| 1 | /* Functions for image support on window system. |
| 2 | Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
| 3 | 2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GNU Emacs. |
| 6 | |
| 7 | GNU Emacs is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2, or (at your option) |
| 10 | any later version. |
| 11 | |
| 12 | GNU Emacs is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with GNU Emacs; see the file COPYING. If not, write to |
| 19 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| 20 | Boston, MA 02110-1301, USA. */ |
| 21 | |
| 22 | #include <config.h> |
| 23 | #include <stdio.h> |
| 24 | #include <math.h> |
| 25 | #include <ctype.h> |
| 26 | |
| 27 | #ifdef HAVE_UNISTD_H |
| 28 | #include <unistd.h> |
| 29 | #endif |
| 30 | |
| 31 | /* This makes the fields of a Display accessible, in Xlib header files. */ |
| 32 | |
| 33 | #define XLIB_ILLEGAL_ACCESS |
| 34 | |
| 35 | #include "lisp.h" |
| 36 | #include "frame.h" |
| 37 | #include "window.h" |
| 38 | #include "dispextern.h" |
| 39 | #include "blockinput.h" |
| 40 | #include "systime.h" |
| 41 | #include <epaths.h> |
| 42 | #include "charset.h" |
| 43 | #include "coding.h" |
| 44 | |
| 45 | |
| 46 | #ifdef HAVE_X_WINDOWS |
| 47 | #include "xterm.h" |
| 48 | #include <sys/types.h> |
| 49 | #include <sys/stat.h> |
| 50 | |
| 51 | #define COLOR_TABLE_SUPPORT 1 |
| 52 | |
| 53 | typedef struct x_bitmap_record Bitmap_Record; |
| 54 | #define GET_PIXEL(ximg, x, y) XGetPixel(ximg, x, y) |
| 55 | #define NO_PIXMAP None |
| 56 | |
| 57 | #define RGB_PIXEL_COLOR unsigned long |
| 58 | |
| 59 | #define PIX_MASK_RETAIN 0 |
| 60 | #define PIX_MASK_DRAW 1 |
| 61 | #endif /* HAVE_X_WINDOWS */ |
| 62 | |
| 63 | |
| 64 | #ifdef HAVE_NTGUI |
| 65 | #include "w32term.h" |
| 66 | |
| 67 | /* W32_TODO : Color tables on W32. */ |
| 68 | #undef COLOR_TABLE_SUPPORT |
| 69 | |
| 70 | typedef struct w32_bitmap_record Bitmap_Record; |
| 71 | #define GET_PIXEL(ximg, x, y) GetPixel(ximg, x, y) |
| 72 | #define NO_PIXMAP 0 |
| 73 | |
| 74 | #define RGB_PIXEL_COLOR COLORREF |
| 75 | |
| 76 | #define PIX_MASK_RETAIN 0 |
| 77 | #define PIX_MASK_DRAW 1 |
| 78 | |
| 79 | #define FRAME_X_VISUAL(f) FRAME_X_DISPLAY_INFO (f)->visual |
| 80 | #define x_defined_color w32_defined_color |
| 81 | #define DefaultDepthOfScreen(screen) (one_w32_display_info.n_cbits) |
| 82 | #endif /* HAVE_NTGUI */ |
| 83 | |
| 84 | |
| 85 | #ifdef MAC_OS |
| 86 | #include "macterm.h" |
| 87 | #include <sys/stat.h> |
| 88 | #ifndef MAC_OSX |
| 89 | #include <alloca.h> |
| 90 | #include <sys/param.h> |
| 91 | #endif |
| 92 | #if TARGET_API_MAC_CARBON |
| 93 | #ifdef MAC_OSX |
| 94 | #include <QuickTime/QuickTime.h> |
| 95 | #else /* not MAC_OSX */ |
| 96 | #include <QuickTime.h> |
| 97 | #endif /* not MAC_OSX */ |
| 98 | #else /* not TARGET_API_MAC_CARBON */ |
| 99 | #include <Windows.h> |
| 100 | #include <Gestalt.h> |
| 101 | #include <TextUtils.h> |
| 102 | #include <ImageCompression.h> |
| 103 | #include <QuickTimeComponents.h> |
| 104 | #endif /* not TARGET_API_MAC_CARBON */ |
| 105 | |
| 106 | /* MAC_TODO : Color tables on Mac. */ |
| 107 | #undef COLOR_TABLE_SUPPORT |
| 108 | |
| 109 | #define ZPixmap 0 /* arbitrary */ |
| 110 | typedef struct mac_bitmap_record Bitmap_Record; |
| 111 | |
| 112 | #define GET_PIXEL(ximg, x, y) XGetPixel(ximg, x, y) |
| 113 | #define NO_PIXMAP 0 |
| 114 | |
| 115 | #define RGB_PIXEL_COLOR unsigned long |
| 116 | |
| 117 | /* A black pixel in a mask bitmap/pixmap means ``draw a source |
| 118 | pixel''. A white pixel means ``retain the current pixel''. */ |
| 119 | #define PIX_MASK_DRAW RGB_TO_ULONG(0,0,0) |
| 120 | #define PIX_MASK_RETAIN RGB_TO_ULONG(255,255,255) |
| 121 | |
| 122 | #define FRAME_X_VISUAL(f) FRAME_X_DISPLAY_INFO (f)->visual |
| 123 | #define x_defined_color mac_defined_color |
| 124 | #define DefaultDepthOfScreen(screen) (one_mac_display_info.n_planes) |
| 125 | #define XDrawLine(display, w, gc, x1, y1, x2, y2) \ |
| 126 | mac_draw_line_to_pixmap(display, w, gc, x1, y1, x2, y2) |
| 127 | |
| 128 | #endif /* MAC_OS */ |
| 129 | |
| 130 | |
| 131 | /* Search path for bitmap files. */ |
| 132 | |
| 133 | Lisp_Object Vx_bitmap_file_path; |
| 134 | |
| 135 | |
| 136 | static void x_disable_image P_ ((struct frame *, struct image *)); |
| 137 | static void x_edge_detection P_ ((struct frame *, struct image *, Lisp_Object, |
| 138 | Lisp_Object)); |
| 139 | |
| 140 | static void init_color_table P_ ((void)); |
| 141 | static unsigned long lookup_rgb_color P_ ((struct frame *f, int r, int g, int b)); |
| 142 | #ifdef COLOR_TABLE_SUPPORT |
| 143 | static void free_color_table P_ ((void)); |
| 144 | static unsigned long *colors_in_color_table P_ ((int *n)); |
| 145 | static unsigned long lookup_pixel_color P_ ((struct frame *f, unsigned long p)); |
| 146 | #endif |
| 147 | |
| 148 | /* Code to deal with bitmaps. Bitmaps are referenced by their bitmap |
| 149 | id, which is just an int that this section returns. Bitmaps are |
| 150 | reference counted so they can be shared among frames. |
| 151 | |
| 152 | Bitmap indices are guaranteed to be > 0, so a negative number can |
| 153 | be used to indicate no bitmap. |
| 154 | |
| 155 | If you use x_create_bitmap_from_data, then you must keep track of |
| 156 | the bitmaps yourself. That is, creating a bitmap from the same |
| 157 | data more than once will not be caught. */ |
| 158 | |
| 159 | #ifdef MAC_OS |
| 160 | |
| 161 | static XImagePtr |
| 162 | XGetImage (display, pixmap, x, y, width, height, plane_mask, format) |
| 163 | Display *display; /* not used */ |
| 164 | Pixmap pixmap; |
| 165 | int x, y; /* not used */ |
| 166 | unsigned int width, height; /* not used */ |
| 167 | unsigned long plane_mask; /* not used */ |
| 168 | int format; /* not used */ |
| 169 | { |
| 170 | #if GLYPH_DEBUG |
| 171 | xassert (x == 0 && y == 0); |
| 172 | { |
| 173 | Rect ri, rp; |
| 174 | SetRect (&ri, 0, 0, width, height); |
| 175 | xassert (EqualRect (&ri, GetPixBounds (GetGWorldPixMap (pixmap), &rp))); |
| 176 | } |
| 177 | xassert (! (pixelsLocked & GetPixelsState (GetGWorldPixMap (pixmap)))); |
| 178 | #endif |
| 179 | |
| 180 | LockPixels (GetGWorldPixMap (pixmap)); |
| 181 | |
| 182 | return pixmap; |
| 183 | } |
| 184 | |
| 185 | static void |
| 186 | XPutPixel (ximage, x, y, pixel) |
| 187 | XImagePtr ximage; |
| 188 | int x, y; |
| 189 | unsigned long pixel; |
| 190 | { |
| 191 | PixMapHandle pixmap = GetGWorldPixMap (ximage); |
| 192 | short depth = GetPixDepth (pixmap); |
| 193 | |
| 194 | #if defined (WORDS_BIG_ENDIAN) || !USE_CG_DRAWING |
| 195 | if (depth == 32) |
| 196 | { |
| 197 | char *base_addr = GetPixBaseAddr (pixmap); |
| 198 | short row_bytes = GetPixRowBytes (pixmap); |
| 199 | |
| 200 | ((unsigned long *) (base_addr + y * row_bytes))[x] = 0xff000000 | pixel; |
| 201 | } |
| 202 | else |
| 203 | #endif |
| 204 | if (depth == 1) |
| 205 | { |
| 206 | char *base_addr = GetPixBaseAddr (pixmap); |
| 207 | short row_bytes = GetPixRowBytes (pixmap); |
| 208 | |
| 209 | if (pixel == PIX_MASK_DRAW) |
| 210 | base_addr[y * row_bytes + x / 8] |= (1 << 7) >> (x & 7); |
| 211 | else |
| 212 | base_addr[y * row_bytes + x / 8] &= ~((1 << 7) >> (x & 7)); |
| 213 | } |
| 214 | else |
| 215 | { |
| 216 | CGrafPtr old_port; |
| 217 | GDHandle old_gdh; |
| 218 | RGBColor color; |
| 219 | |
| 220 | GetGWorld (&old_port, &old_gdh); |
| 221 | SetGWorld (ximage, NULL); |
| 222 | |
| 223 | color.red = RED16_FROM_ULONG (pixel); |
| 224 | color.green = GREEN16_FROM_ULONG (pixel); |
| 225 | color.blue = BLUE16_FROM_ULONG (pixel); |
| 226 | |
| 227 | SetCPixel (x, y, &color); |
| 228 | |
| 229 | SetGWorld (old_port, old_gdh); |
| 230 | } |
| 231 | } |
| 232 | |
| 233 | static unsigned long |
| 234 | XGetPixel (ximage, x, y) |
| 235 | XImagePtr ximage; |
| 236 | int x, y; |
| 237 | { |
| 238 | PixMapHandle pixmap = GetGWorldPixMap (ximage); |
| 239 | short depth = GetPixDepth (pixmap); |
| 240 | |
| 241 | #if defined (WORDS_BIG_ENDIAN) || !USE_CG_DRAWING |
| 242 | if (depth == 32) |
| 243 | { |
| 244 | char *base_addr = GetPixBaseAddr (pixmap); |
| 245 | short row_bytes = GetPixRowBytes (pixmap); |
| 246 | |
| 247 | return ((unsigned long *) (base_addr + y * row_bytes))[x] & 0x00ffffff; |
| 248 | } |
| 249 | else |
| 250 | #endif |
| 251 | if (depth == 1) |
| 252 | { |
| 253 | char *base_addr = GetPixBaseAddr (pixmap); |
| 254 | short row_bytes = GetPixRowBytes (pixmap); |
| 255 | |
| 256 | if (base_addr[y * row_bytes + x / 8] & (1 << (~x & 7))) |
| 257 | return PIX_MASK_DRAW; |
| 258 | else |
| 259 | return PIX_MASK_RETAIN; |
| 260 | } |
| 261 | else |
| 262 | { |
| 263 | CGrafPtr old_port; |
| 264 | GDHandle old_gdh; |
| 265 | RGBColor color; |
| 266 | |
| 267 | GetGWorld (&old_port, &old_gdh); |
| 268 | SetGWorld (ximage, NULL); |
| 269 | |
| 270 | GetCPixel (x, y, &color); |
| 271 | |
| 272 | SetGWorld (old_port, old_gdh); |
| 273 | return RGB_TO_ULONG (color.red >> 8, color.green >> 8, color.blue >> 8); |
| 274 | } |
| 275 | } |
| 276 | |
| 277 | static void |
| 278 | XDestroyImage (ximg) |
| 279 | XImagePtr ximg; |
| 280 | { |
| 281 | UnlockPixels (GetGWorldPixMap (ximg)); |
| 282 | } |
| 283 | |
| 284 | #if USE_CG_DRAWING |
| 285 | static CGImageRef |
| 286 | mac_create_cg_image_from_image (f, img) |
| 287 | struct frame *f; |
| 288 | struct image *img; |
| 289 | { |
| 290 | Pixmap mask; |
| 291 | CGImageRef result = NULL; |
| 292 | |
| 293 | BLOCK_INPUT; |
| 294 | if (img->mask) |
| 295 | mask = img->mask; |
| 296 | else |
| 297 | { |
| 298 | mask = XCreatePixmap (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), |
| 299 | img->width, img->height, 1); |
| 300 | if (mask) |
| 301 | { |
| 302 | CGrafPtr old_port; |
| 303 | GDHandle old_gdh; |
| 304 | Rect r; |
| 305 | |
| 306 | GetGWorld (&old_port, &old_gdh); |
| 307 | SetGWorld (mask, NULL); |
| 308 | BackColor (blackColor); /* Don't mask. */ |
| 309 | SetRect (&r, 0, 0, img->width, img->height); |
| 310 | EraseRect (&r); |
| 311 | SetGWorld (old_port, old_gdh); |
| 312 | } |
| 313 | } |
| 314 | if (mask) |
| 315 | { |
| 316 | CreateCGImageFromPixMaps (GetGWorldPixMap (img->pixmap), |
| 317 | GetGWorldPixMap (mask), &result); |
| 318 | if (mask != img->mask) |
| 319 | XFreePixmap (FRAME_X_DISPLAY (f), mask); |
| 320 | } |
| 321 | UNBLOCK_INPUT; |
| 322 | |
| 323 | return result; |
| 324 | } |
| 325 | #endif /* USE_CG_DRAWING */ |
| 326 | #endif /* MAC_OS */ |
| 327 | |
| 328 | |
| 329 | /* Functions to access the contents of a bitmap, given an id. */ |
| 330 | |
| 331 | int |
| 332 | x_bitmap_height (f, id) |
| 333 | FRAME_PTR f; |
| 334 | int id; |
| 335 | { |
| 336 | return FRAME_X_DISPLAY_INFO (f)->bitmaps[id - 1].height; |
| 337 | } |
| 338 | |
| 339 | int |
| 340 | x_bitmap_width (f, id) |
| 341 | FRAME_PTR f; |
| 342 | int id; |
| 343 | { |
| 344 | return FRAME_X_DISPLAY_INFO (f)->bitmaps[id - 1].width; |
| 345 | } |
| 346 | |
| 347 | #if defined (HAVE_X_WINDOWS) || defined (HAVE_NTGUI) |
| 348 | int |
| 349 | x_bitmap_pixmap (f, id) |
| 350 | FRAME_PTR f; |
| 351 | int id; |
| 352 | { |
| 353 | return (int) FRAME_X_DISPLAY_INFO (f)->bitmaps[id - 1].pixmap; |
| 354 | } |
| 355 | #endif |
| 356 | |
| 357 | #ifdef HAVE_X_WINDOWS |
| 358 | int |
| 359 | x_bitmap_mask (f, id) |
| 360 | FRAME_PTR f; |
| 361 | int id; |
| 362 | { |
| 363 | return FRAME_X_DISPLAY_INFO (f)->bitmaps[id - 1].mask; |
| 364 | } |
| 365 | #endif |
| 366 | |
| 367 | /* Allocate a new bitmap record. Returns index of new record. */ |
| 368 | |
| 369 | static int |
| 370 | x_allocate_bitmap_record (f) |
| 371 | FRAME_PTR f; |
| 372 | { |
| 373 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); |
| 374 | int i; |
| 375 | |
| 376 | if (dpyinfo->bitmaps == NULL) |
| 377 | { |
| 378 | dpyinfo->bitmaps_size = 10; |
| 379 | dpyinfo->bitmaps |
| 380 | = (Bitmap_Record *) xmalloc (dpyinfo->bitmaps_size * sizeof (Bitmap_Record)); |
| 381 | dpyinfo->bitmaps_last = 1; |
| 382 | return 1; |
| 383 | } |
| 384 | |
| 385 | if (dpyinfo->bitmaps_last < dpyinfo->bitmaps_size) |
| 386 | return ++dpyinfo->bitmaps_last; |
| 387 | |
| 388 | for (i = 0; i < dpyinfo->bitmaps_size; ++i) |
| 389 | if (dpyinfo->bitmaps[i].refcount == 0) |
| 390 | return i + 1; |
| 391 | |
| 392 | dpyinfo->bitmaps_size *= 2; |
| 393 | dpyinfo->bitmaps |
| 394 | = (Bitmap_Record *) xrealloc (dpyinfo->bitmaps, |
| 395 | dpyinfo->bitmaps_size * sizeof (Bitmap_Record)); |
| 396 | return ++dpyinfo->bitmaps_last; |
| 397 | } |
| 398 | |
| 399 | /* Add one reference to the reference count of the bitmap with id ID. */ |
| 400 | |
| 401 | void |
| 402 | x_reference_bitmap (f, id) |
| 403 | FRAME_PTR f; |
| 404 | int id; |
| 405 | { |
| 406 | ++FRAME_X_DISPLAY_INFO (f)->bitmaps[id - 1].refcount; |
| 407 | } |
| 408 | |
| 409 | /* Create a bitmap for frame F from a HEIGHT x WIDTH array of bits at BITS. */ |
| 410 | |
| 411 | int |
| 412 | x_create_bitmap_from_data (f, bits, width, height) |
| 413 | struct frame *f; |
| 414 | char *bits; |
| 415 | unsigned int width, height; |
| 416 | { |
| 417 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); |
| 418 | int id; |
| 419 | |
| 420 | #ifdef HAVE_X_WINDOWS |
| 421 | Pixmap bitmap; |
| 422 | bitmap = XCreateBitmapFromData (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), |
| 423 | bits, width, height); |
| 424 | if (! bitmap) |
| 425 | return -1; |
| 426 | #endif /* HAVE_X_WINDOWS */ |
| 427 | |
| 428 | #ifdef HAVE_NTGUI |
| 429 | Pixmap bitmap; |
| 430 | bitmap = CreateBitmap (width, height, |
| 431 | FRAME_X_DISPLAY_INFO (XFRAME (frame))->n_planes, |
| 432 | FRAME_X_DISPLAY_INFO (XFRAME (frame))->n_cbits, |
| 433 | bits); |
| 434 | if (! bitmap) |
| 435 | return -1; |
| 436 | #endif /* HAVE_NTGUI */ |
| 437 | |
| 438 | #ifdef MAC_OS |
| 439 | /* MAC_TODO: for now fail if width is not mod 16 (toolbox requires it) */ |
| 440 | if (width % 16 != 0) |
| 441 | return -1; |
| 442 | #endif |
| 443 | |
| 444 | id = x_allocate_bitmap_record (f); |
| 445 | #ifdef MAC_OS |
| 446 | dpyinfo->bitmaps[id - 1].bitmap_data = (char *) xmalloc (height * width); |
| 447 | if (! dpyinfo->bitmaps[id - 1].bitmap_data) |
| 448 | return -1; |
| 449 | bcopy (bits, dpyinfo->bitmaps[id - 1].bitmap_data, height * width); |
| 450 | #endif /* MAC_OS */ |
| 451 | |
| 452 | dpyinfo->bitmaps[id - 1].file = NULL; |
| 453 | dpyinfo->bitmaps[id - 1].height = height; |
| 454 | dpyinfo->bitmaps[id - 1].width = width; |
| 455 | dpyinfo->bitmaps[id - 1].refcount = 1; |
| 456 | |
| 457 | #ifdef HAVE_X_WINDOWS |
| 458 | dpyinfo->bitmaps[id - 1].pixmap = bitmap; |
| 459 | dpyinfo->bitmaps[id - 1].have_mask = 0; |
| 460 | dpyinfo->bitmaps[id - 1].depth = 1; |
| 461 | #endif /* HAVE_X_WINDOWS */ |
| 462 | |
| 463 | #ifdef HAVE_NTGUI |
| 464 | dpyinfo->bitmaps[id - 1].pixmap = bitmap; |
| 465 | dpyinfo->bitmaps[id - 1].hinst = NULL; |
| 466 | dpyinfo->bitmaps[id - 1].depth = 1; |
| 467 | #endif /* HAVE_NTGUI */ |
| 468 | |
| 469 | return id; |
| 470 | } |
| 471 | |
| 472 | /* Create bitmap from file FILE for frame F. */ |
| 473 | |
| 474 | int |
| 475 | x_create_bitmap_from_file (f, file) |
| 476 | struct frame *f; |
| 477 | Lisp_Object file; |
| 478 | { |
| 479 | #ifdef MAC_OS |
| 480 | return -1; /* MAC_TODO : bitmap support */ |
| 481 | #endif /* MAC_OS */ |
| 482 | |
| 483 | #ifdef HAVE_NTGUI |
| 484 | return -1; /* W32_TODO : bitmap support */ |
| 485 | #endif /* HAVE_NTGUI */ |
| 486 | |
| 487 | #ifdef HAVE_X_WINDOWS |
| 488 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); |
| 489 | unsigned int width, height; |
| 490 | Pixmap bitmap; |
| 491 | int xhot, yhot, result, id; |
| 492 | Lisp_Object found; |
| 493 | int fd; |
| 494 | char *filename; |
| 495 | |
| 496 | /* Look for an existing bitmap with the same name. */ |
| 497 | for (id = 0; id < dpyinfo->bitmaps_last; ++id) |
| 498 | { |
| 499 | if (dpyinfo->bitmaps[id].refcount |
| 500 | && dpyinfo->bitmaps[id].file |
| 501 | && !strcmp (dpyinfo->bitmaps[id].file, (char *) SDATA (file))) |
| 502 | { |
| 503 | ++dpyinfo->bitmaps[id].refcount; |
| 504 | return id + 1; |
| 505 | } |
| 506 | } |
| 507 | |
| 508 | /* Search bitmap-file-path for the file, if appropriate. */ |
| 509 | fd = openp (Vx_bitmap_file_path, file, Qnil, &found, Qnil); |
| 510 | if (fd < 0) |
| 511 | return -1; |
| 512 | emacs_close (fd); |
| 513 | |
| 514 | filename = (char *) SDATA (found); |
| 515 | |
| 516 | result = XReadBitmapFile (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), |
| 517 | filename, &width, &height, &bitmap, &xhot, &yhot); |
| 518 | if (result != BitmapSuccess) |
| 519 | return -1; |
| 520 | |
| 521 | id = x_allocate_bitmap_record (f); |
| 522 | dpyinfo->bitmaps[id - 1].pixmap = bitmap; |
| 523 | dpyinfo->bitmaps[id - 1].have_mask = 0; |
| 524 | dpyinfo->bitmaps[id - 1].refcount = 1; |
| 525 | dpyinfo->bitmaps[id - 1].file = (char *) xmalloc (SBYTES (file) + 1); |
| 526 | dpyinfo->bitmaps[id - 1].depth = 1; |
| 527 | dpyinfo->bitmaps[id - 1].height = height; |
| 528 | dpyinfo->bitmaps[id - 1].width = width; |
| 529 | strcpy (dpyinfo->bitmaps[id - 1].file, SDATA (file)); |
| 530 | |
| 531 | return id; |
| 532 | #endif /* HAVE_X_WINDOWS */ |
| 533 | } |
| 534 | |
| 535 | /* Free bitmap B. */ |
| 536 | |
| 537 | static void |
| 538 | Free_Bitmap_Record (dpyinfo, bm) |
| 539 | Display_Info *dpyinfo; |
| 540 | Bitmap_Record *bm; |
| 541 | { |
| 542 | #ifdef HAVE_X_WINDOWS |
| 543 | XFreePixmap (dpyinfo->display, bm->pixmap); |
| 544 | if (bm->have_mask) |
| 545 | XFreePixmap (dpyinfo->display, bm->mask); |
| 546 | #endif /* HAVE_X_WINDOWS */ |
| 547 | |
| 548 | #ifdef HAVE_NTGUI |
| 549 | DeleteObject (bm->pixmap); |
| 550 | #endif /* HAVE_NTGUI */ |
| 551 | |
| 552 | #ifdef MAC_OS |
| 553 | xfree (bm->bitmap_data); /* Added ++kfs */ |
| 554 | bm->bitmap_data = NULL; |
| 555 | #endif /* MAC_OS */ |
| 556 | |
| 557 | if (bm->file) |
| 558 | { |
| 559 | xfree (bm->file); |
| 560 | bm->file = NULL; |
| 561 | } |
| 562 | } |
| 563 | |
| 564 | /* Remove reference to bitmap with id number ID. */ |
| 565 | |
| 566 | void |
| 567 | x_destroy_bitmap (f, id) |
| 568 | FRAME_PTR f; |
| 569 | int id; |
| 570 | { |
| 571 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); |
| 572 | |
| 573 | if (id > 0) |
| 574 | { |
| 575 | Bitmap_Record *bm = &dpyinfo->bitmaps[id - 1]; |
| 576 | |
| 577 | if (--bm->refcount == 0) |
| 578 | { |
| 579 | BLOCK_INPUT; |
| 580 | Free_Bitmap_Record (dpyinfo, bm); |
| 581 | UNBLOCK_INPUT; |
| 582 | } |
| 583 | } |
| 584 | } |
| 585 | |
| 586 | /* Free all the bitmaps for the display specified by DPYINFO. */ |
| 587 | |
| 588 | void |
| 589 | x_destroy_all_bitmaps (dpyinfo) |
| 590 | Display_Info *dpyinfo; |
| 591 | { |
| 592 | int i; |
| 593 | Bitmap_Record *bm = dpyinfo->bitmaps; |
| 594 | |
| 595 | for (i = 0; i < dpyinfo->bitmaps_last; i++, bm++) |
| 596 | if (bm->refcount > 0) |
| 597 | Free_Bitmap_Record (dpyinfo, bm); |
| 598 | |
| 599 | dpyinfo->bitmaps_last = 0; |
| 600 | } |
| 601 | |
| 602 | |
| 603 | #ifdef HAVE_X_WINDOWS |
| 604 | |
| 605 | /* Useful functions defined in the section |
| 606 | `Image type independent image structures' below. */ |
| 607 | |
| 608 | static unsigned long four_corners_best P_ ((XImagePtr ximg, unsigned long width, |
| 609 | unsigned long height)); |
| 610 | |
| 611 | static int x_create_x_image_and_pixmap P_ ((struct frame *f, int width, int height, |
| 612 | int depth, XImagePtr *ximg, |
| 613 | Pixmap *pixmap)); |
| 614 | |
| 615 | static void x_destroy_x_image P_ ((XImagePtr ximg)); |
| 616 | |
| 617 | |
| 618 | /* Create a mask of a bitmap. Note is this not a perfect mask. |
| 619 | It's nicer with some borders in this context */ |
| 620 | |
| 621 | int |
| 622 | x_create_bitmap_mask (f, id) |
| 623 | struct frame *f; |
| 624 | int id; |
| 625 | { |
| 626 | Pixmap pixmap, mask; |
| 627 | XImagePtr ximg, mask_img; |
| 628 | unsigned long width, height; |
| 629 | int result; |
| 630 | unsigned long bg; |
| 631 | unsigned long x, y, xp, xm, yp, ym; |
| 632 | GC gc; |
| 633 | |
| 634 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); |
| 635 | |
| 636 | if (!(id > 0)) |
| 637 | return -1; |
| 638 | |
| 639 | pixmap = x_bitmap_pixmap (f, id); |
| 640 | width = x_bitmap_width (f, id); |
| 641 | height = x_bitmap_height (f, id); |
| 642 | |
| 643 | BLOCK_INPUT; |
| 644 | ximg = XGetImage (FRAME_X_DISPLAY (f), pixmap, 0, 0, width, height, |
| 645 | ~0, ZPixmap); |
| 646 | |
| 647 | if (!ximg) |
| 648 | { |
| 649 | UNBLOCK_INPUT; |
| 650 | return -1; |
| 651 | } |
| 652 | |
| 653 | result = x_create_x_image_and_pixmap (f, width, height, 1, &mask_img, &mask); |
| 654 | |
| 655 | UNBLOCK_INPUT; |
| 656 | if (!result) |
| 657 | { |
| 658 | XDestroyImage (ximg); |
| 659 | return -1; |
| 660 | } |
| 661 | |
| 662 | bg = four_corners_best (ximg, width, height); |
| 663 | |
| 664 | for (y = 0; y < ximg->height; ++y) |
| 665 | { |
| 666 | for (x = 0; x < ximg->width; ++x) |
| 667 | { |
| 668 | xp = x != ximg->width - 1 ? x + 1 : 0; |
| 669 | xm = x != 0 ? x - 1 : ximg->width - 1; |
| 670 | yp = y != ximg->height - 1 ? y + 1 : 0; |
| 671 | ym = y != 0 ? y - 1 : ximg->height - 1; |
| 672 | if (XGetPixel (ximg, x, y) == bg |
| 673 | && XGetPixel (ximg, x, yp) == bg |
| 674 | && XGetPixel (ximg, x, ym) == bg |
| 675 | && XGetPixel (ximg, xp, y) == bg |
| 676 | && XGetPixel (ximg, xp, yp) == bg |
| 677 | && XGetPixel (ximg, xp, ym) == bg |
| 678 | && XGetPixel (ximg, xm, y) == bg |
| 679 | && XGetPixel (ximg, xm, yp) == bg |
| 680 | && XGetPixel (ximg, xm, ym) == bg) |
| 681 | XPutPixel (mask_img, x, y, 0); |
| 682 | else |
| 683 | XPutPixel (mask_img, x, y, 1); |
| 684 | } |
| 685 | } |
| 686 | |
| 687 | xassert (interrupt_input_blocked); |
| 688 | gc = XCreateGC (FRAME_X_DISPLAY (f), mask, 0, NULL); |
| 689 | XPutImage (FRAME_X_DISPLAY (f), mask, gc, mask_img, 0, 0, 0, 0, |
| 690 | width, height); |
| 691 | XFreeGC (FRAME_X_DISPLAY (f), gc); |
| 692 | |
| 693 | dpyinfo->bitmaps[id - 1].have_mask = 1; |
| 694 | dpyinfo->bitmaps[id - 1].mask = mask; |
| 695 | |
| 696 | XDestroyImage (ximg); |
| 697 | x_destroy_x_image (mask_img); |
| 698 | |
| 699 | return 0; |
| 700 | } |
| 701 | |
| 702 | #endif /* HAVE_X_WINDOWS */ |
| 703 | |
| 704 | |
| 705 | /*********************************************************************** |
| 706 | Image types |
| 707 | ***********************************************************************/ |
| 708 | |
| 709 | /* Value is the number of elements of vector VECTOR. */ |
| 710 | |
| 711 | #define DIM(VECTOR) (sizeof (VECTOR) / sizeof *(VECTOR)) |
| 712 | |
| 713 | /* List of supported image types. Use define_image_type to add new |
| 714 | types. Use lookup_image_type to find a type for a given symbol. */ |
| 715 | |
| 716 | static struct image_type *image_types; |
| 717 | |
| 718 | /* A list of symbols, one for each supported image type. */ |
| 719 | |
| 720 | Lisp_Object Vimage_types; |
| 721 | |
| 722 | /* An alist of image types and libraries that implement the type. */ |
| 723 | |
| 724 | Lisp_Object Vimage_library_alist; |
| 725 | |
| 726 | /* Cache for delayed-loading image types. */ |
| 727 | |
| 728 | static Lisp_Object Vimage_type_cache; |
| 729 | |
| 730 | /* The symbol `xbm' which is used as the type symbol for XBM images. */ |
| 731 | |
| 732 | Lisp_Object Qxbm; |
| 733 | |
| 734 | /* Keywords. */ |
| 735 | |
| 736 | extern Lisp_Object QCwidth, QCheight, QCforeground, QCbackground, QCfile; |
| 737 | extern Lisp_Object QCdata, QCtype; |
| 738 | extern Lisp_Object Qcenter; |
| 739 | Lisp_Object QCascent, QCmargin, QCrelief; |
| 740 | Lisp_Object QCconversion, QCcolor_symbols, QCheuristic_mask; |
| 741 | Lisp_Object QCindex, QCmatrix, QCcolor_adjustment, QCmask; |
| 742 | |
| 743 | /* Other symbols. */ |
| 744 | |
| 745 | Lisp_Object Qlaplace, Qemboss, Qedge_detection, Qheuristic; |
| 746 | |
| 747 | /* Time in seconds after which images should be removed from the cache |
| 748 | if not displayed. */ |
| 749 | |
| 750 | Lisp_Object Vimage_cache_eviction_delay; |
| 751 | |
| 752 | /* Function prototypes. */ |
| 753 | |
| 754 | static Lisp_Object define_image_type P_ ((struct image_type *type, int loaded)); |
| 755 | static struct image_type *lookup_image_type P_ ((Lisp_Object symbol)); |
| 756 | static void image_error P_ ((char *format, Lisp_Object, Lisp_Object)); |
| 757 | static void x_laplace P_ ((struct frame *, struct image *)); |
| 758 | static void x_emboss P_ ((struct frame *, struct image *)); |
| 759 | static int x_build_heuristic_mask P_ ((struct frame *, struct image *, |
| 760 | Lisp_Object)); |
| 761 | |
| 762 | #define CACHE_IMAGE_TYPE(type, status) \ |
| 763 | do { Vimage_type_cache = Fcons (Fcons (type, status), Vimage_type_cache); } while (0) |
| 764 | |
| 765 | #define ADD_IMAGE_TYPE(type) \ |
| 766 | do { Vimage_types = Fcons (type, Vimage_types); } while (0) |
| 767 | |
| 768 | /* Define a new image type from TYPE. This adds a copy of TYPE to |
| 769 | image_types and caches the loading status of TYPE. */ |
| 770 | |
| 771 | static Lisp_Object |
| 772 | define_image_type (type, loaded) |
| 773 | struct image_type *type; |
| 774 | int loaded; |
| 775 | { |
| 776 | Lisp_Object success; |
| 777 | |
| 778 | if (!loaded) |
| 779 | success = Qnil; |
| 780 | else |
| 781 | { |
| 782 | /* Make a copy of TYPE to avoid a bus error in a dumped Emacs. |
| 783 | The initialized data segment is read-only. */ |
| 784 | struct image_type *p = (struct image_type *) xmalloc (sizeof *p); |
| 785 | bcopy (type, p, sizeof *p); |
| 786 | p->next = image_types; |
| 787 | image_types = p; |
| 788 | success = Qt; |
| 789 | } |
| 790 | |
| 791 | CACHE_IMAGE_TYPE (*type->type, success); |
| 792 | return success; |
| 793 | } |
| 794 | |
| 795 | |
| 796 | /* Look up image type SYMBOL, and return a pointer to its image_type |
| 797 | structure. Value is null if SYMBOL is not a known image type. */ |
| 798 | |
| 799 | static INLINE struct image_type * |
| 800 | lookup_image_type (symbol) |
| 801 | Lisp_Object symbol; |
| 802 | { |
| 803 | struct image_type *type; |
| 804 | |
| 805 | /* We must initialize the image-type if it hasn't been already. */ |
| 806 | if (NILP (Finit_image_library (symbol, Vimage_library_alist))) |
| 807 | return 0; /* unimplemented */ |
| 808 | |
| 809 | for (type = image_types; type; type = type->next) |
| 810 | if (EQ (symbol, *type->type)) |
| 811 | break; |
| 812 | |
| 813 | return type; |
| 814 | } |
| 815 | |
| 816 | |
| 817 | /* Value is non-zero if OBJECT is a valid Lisp image specification. A |
| 818 | valid image specification is a list whose car is the symbol |
| 819 | `image', and whose rest is a property list. The property list must |
| 820 | contain a value for key `:type'. That value must be the name of a |
| 821 | supported image type. The rest of the property list depends on the |
| 822 | image type. */ |
| 823 | |
| 824 | int |
| 825 | valid_image_p (object) |
| 826 | Lisp_Object object; |
| 827 | { |
| 828 | int valid_p = 0; |
| 829 | |
| 830 | if (IMAGEP (object)) |
| 831 | { |
| 832 | Lisp_Object tem; |
| 833 | |
| 834 | for (tem = XCDR (object); CONSP (tem); tem = XCDR (tem)) |
| 835 | if (EQ (XCAR (tem), QCtype)) |
| 836 | { |
| 837 | tem = XCDR (tem); |
| 838 | if (CONSP (tem) && SYMBOLP (XCAR (tem))) |
| 839 | { |
| 840 | struct image_type *type; |
| 841 | type = lookup_image_type (XCAR (tem)); |
| 842 | if (type) |
| 843 | valid_p = type->valid_p (object); |
| 844 | } |
| 845 | |
| 846 | break; |
| 847 | } |
| 848 | } |
| 849 | |
| 850 | return valid_p; |
| 851 | } |
| 852 | |
| 853 | |
| 854 | /* Log error message with format string FORMAT and argument ARG. |
| 855 | Signaling an error, e.g. when an image cannot be loaded, is not a |
| 856 | good idea because this would interrupt redisplay, and the error |
| 857 | message display would lead to another redisplay. This function |
| 858 | therefore simply displays a message. */ |
| 859 | |
| 860 | static void |
| 861 | image_error (format, arg1, arg2) |
| 862 | char *format; |
| 863 | Lisp_Object arg1, arg2; |
| 864 | { |
| 865 | add_to_log (format, arg1, arg2); |
| 866 | } |
| 867 | |
| 868 | |
| 869 | \f |
| 870 | /*********************************************************************** |
| 871 | Image specifications |
| 872 | ***********************************************************************/ |
| 873 | |
| 874 | enum image_value_type |
| 875 | { |
| 876 | IMAGE_DONT_CHECK_VALUE_TYPE, |
| 877 | IMAGE_STRING_VALUE, |
| 878 | IMAGE_STRING_OR_NIL_VALUE, |
| 879 | IMAGE_SYMBOL_VALUE, |
| 880 | IMAGE_POSITIVE_INTEGER_VALUE, |
| 881 | IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR, |
| 882 | IMAGE_NON_NEGATIVE_INTEGER_VALUE, |
| 883 | IMAGE_ASCENT_VALUE, |
| 884 | IMAGE_INTEGER_VALUE, |
| 885 | IMAGE_FUNCTION_VALUE, |
| 886 | IMAGE_NUMBER_VALUE, |
| 887 | IMAGE_BOOL_VALUE |
| 888 | }; |
| 889 | |
| 890 | /* Structure used when parsing image specifications. */ |
| 891 | |
| 892 | struct image_keyword |
| 893 | { |
| 894 | /* Name of keyword. */ |
| 895 | char *name; |
| 896 | |
| 897 | /* The type of value allowed. */ |
| 898 | enum image_value_type type; |
| 899 | |
| 900 | /* Non-zero means key must be present. */ |
| 901 | int mandatory_p; |
| 902 | |
| 903 | /* Used to recognize duplicate keywords in a property list. */ |
| 904 | int count; |
| 905 | |
| 906 | /* The value that was found. */ |
| 907 | Lisp_Object value; |
| 908 | }; |
| 909 | |
| 910 | |
| 911 | static int parse_image_spec P_ ((Lisp_Object, struct image_keyword *, |
| 912 | int, Lisp_Object)); |
| 913 | static Lisp_Object image_spec_value P_ ((Lisp_Object, Lisp_Object, int *)); |
| 914 | |
| 915 | |
| 916 | /* Parse image spec SPEC according to KEYWORDS. A valid image spec |
| 917 | has the format (image KEYWORD VALUE ...). One of the keyword/ |
| 918 | value pairs must be `:type TYPE'. KEYWORDS is a vector of |
| 919 | image_keywords structures of size NKEYWORDS describing other |
| 920 | allowed keyword/value pairs. Value is non-zero if SPEC is valid. */ |
| 921 | |
| 922 | static int |
| 923 | parse_image_spec (spec, keywords, nkeywords, type) |
| 924 | Lisp_Object spec; |
| 925 | struct image_keyword *keywords; |
| 926 | int nkeywords; |
| 927 | Lisp_Object type; |
| 928 | { |
| 929 | int i; |
| 930 | Lisp_Object plist; |
| 931 | |
| 932 | if (!IMAGEP (spec)) |
| 933 | return 0; |
| 934 | |
| 935 | plist = XCDR (spec); |
| 936 | while (CONSP (plist)) |
| 937 | { |
| 938 | Lisp_Object key, value; |
| 939 | |
| 940 | /* First element of a pair must be a symbol. */ |
| 941 | key = XCAR (plist); |
| 942 | plist = XCDR (plist); |
| 943 | if (!SYMBOLP (key)) |
| 944 | return 0; |
| 945 | |
| 946 | /* There must follow a value. */ |
| 947 | if (!CONSP (plist)) |
| 948 | return 0; |
| 949 | value = XCAR (plist); |
| 950 | plist = XCDR (plist); |
| 951 | |
| 952 | /* Find key in KEYWORDS. Error if not found. */ |
| 953 | for (i = 0; i < nkeywords; ++i) |
| 954 | if (strcmp (keywords[i].name, SDATA (SYMBOL_NAME (key))) == 0) |
| 955 | break; |
| 956 | |
| 957 | if (i == nkeywords) |
| 958 | continue; |
| 959 | |
| 960 | /* Record that we recognized the keyword. If a keywords |
| 961 | was found more than once, it's an error. */ |
| 962 | keywords[i].value = value; |
| 963 | ++keywords[i].count; |
| 964 | |
| 965 | if (keywords[i].count > 1) |
| 966 | return 0; |
| 967 | |
| 968 | /* Check type of value against allowed type. */ |
| 969 | switch (keywords[i].type) |
| 970 | { |
| 971 | case IMAGE_STRING_VALUE: |
| 972 | if (!STRINGP (value)) |
| 973 | return 0; |
| 974 | break; |
| 975 | |
| 976 | case IMAGE_STRING_OR_NIL_VALUE: |
| 977 | if (!STRINGP (value) && !NILP (value)) |
| 978 | return 0; |
| 979 | break; |
| 980 | |
| 981 | case IMAGE_SYMBOL_VALUE: |
| 982 | if (!SYMBOLP (value)) |
| 983 | return 0; |
| 984 | break; |
| 985 | |
| 986 | case IMAGE_POSITIVE_INTEGER_VALUE: |
| 987 | if (!INTEGERP (value) || XINT (value) <= 0) |
| 988 | return 0; |
| 989 | break; |
| 990 | |
| 991 | case IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR: |
| 992 | if (INTEGERP (value) && XINT (value) >= 0) |
| 993 | break; |
| 994 | if (CONSP (value) |
| 995 | && INTEGERP (XCAR (value)) && INTEGERP (XCDR (value)) |
| 996 | && XINT (XCAR (value)) >= 0 && XINT (XCDR (value)) >= 0) |
| 997 | break; |
| 998 | return 0; |
| 999 | |
| 1000 | case IMAGE_ASCENT_VALUE: |
| 1001 | if (SYMBOLP (value) && EQ (value, Qcenter)) |
| 1002 | break; |
| 1003 | else if (INTEGERP (value) |
| 1004 | && XINT (value) >= 0 |
| 1005 | && XINT (value) <= 100) |
| 1006 | break; |
| 1007 | return 0; |
| 1008 | |
| 1009 | case IMAGE_NON_NEGATIVE_INTEGER_VALUE: |
| 1010 | if (!INTEGERP (value) || XINT (value) < 0) |
| 1011 | return 0; |
| 1012 | break; |
| 1013 | |
| 1014 | case IMAGE_DONT_CHECK_VALUE_TYPE: |
| 1015 | break; |
| 1016 | |
| 1017 | case IMAGE_FUNCTION_VALUE: |
| 1018 | value = indirect_function (value); |
| 1019 | if (SUBRP (value) |
| 1020 | || COMPILEDP (value) |
| 1021 | || (CONSP (value) && EQ (XCAR (value), Qlambda))) |
| 1022 | break; |
| 1023 | return 0; |
| 1024 | |
| 1025 | case IMAGE_NUMBER_VALUE: |
| 1026 | if (!INTEGERP (value) && !FLOATP (value)) |
| 1027 | return 0; |
| 1028 | break; |
| 1029 | |
| 1030 | case IMAGE_INTEGER_VALUE: |
| 1031 | if (!INTEGERP (value)) |
| 1032 | return 0; |
| 1033 | break; |
| 1034 | |
| 1035 | case IMAGE_BOOL_VALUE: |
| 1036 | if (!NILP (value) && !EQ (value, Qt)) |
| 1037 | return 0; |
| 1038 | break; |
| 1039 | |
| 1040 | default: |
| 1041 | abort (); |
| 1042 | break; |
| 1043 | } |
| 1044 | |
| 1045 | if (EQ (key, QCtype) && !EQ (type, value)) |
| 1046 | return 0; |
| 1047 | } |
| 1048 | |
| 1049 | /* Check that all mandatory fields are present. */ |
| 1050 | for (i = 0; i < nkeywords; ++i) |
| 1051 | if (keywords[i].mandatory_p && keywords[i].count == 0) |
| 1052 | return 0; |
| 1053 | |
| 1054 | return NILP (plist); |
| 1055 | } |
| 1056 | |
| 1057 | |
| 1058 | /* Return the value of KEY in image specification SPEC. Value is nil |
| 1059 | if KEY is not present in SPEC. if FOUND is not null, set *FOUND |
| 1060 | to 1 if KEY was found in SPEC, set it to 0 otherwise. */ |
| 1061 | |
| 1062 | static Lisp_Object |
| 1063 | image_spec_value (spec, key, found) |
| 1064 | Lisp_Object spec, key; |
| 1065 | int *found; |
| 1066 | { |
| 1067 | Lisp_Object tail; |
| 1068 | |
| 1069 | xassert (valid_image_p (spec)); |
| 1070 | |
| 1071 | for (tail = XCDR (spec); |
| 1072 | CONSP (tail) && CONSP (XCDR (tail)); |
| 1073 | tail = XCDR (XCDR (tail))) |
| 1074 | { |
| 1075 | if (EQ (XCAR (tail), key)) |
| 1076 | { |
| 1077 | if (found) |
| 1078 | *found = 1; |
| 1079 | return XCAR (XCDR (tail)); |
| 1080 | } |
| 1081 | } |
| 1082 | |
| 1083 | if (found) |
| 1084 | *found = 0; |
| 1085 | return Qnil; |
| 1086 | } |
| 1087 | |
| 1088 | |
| 1089 | DEFUN ("image-size", Fimage_size, Simage_size, 1, 3, 0, |
| 1090 | doc: /* Return the size of image SPEC as pair (WIDTH . HEIGHT). |
| 1091 | PIXELS non-nil means return the size in pixels, otherwise return the |
| 1092 | size in canonical character units. |
| 1093 | FRAME is the frame on which the image will be displayed. FRAME nil |
| 1094 | or omitted means use the selected frame. */) |
| 1095 | (spec, pixels, frame) |
| 1096 | Lisp_Object spec, pixels, frame; |
| 1097 | { |
| 1098 | Lisp_Object size; |
| 1099 | |
| 1100 | size = Qnil; |
| 1101 | if (valid_image_p (spec)) |
| 1102 | { |
| 1103 | struct frame *f = check_x_frame (frame); |
| 1104 | int id = lookup_image (f, spec); |
| 1105 | struct image *img = IMAGE_FROM_ID (f, id); |
| 1106 | int width = img->width + 2 * img->hmargin; |
| 1107 | int height = img->height + 2 * img->vmargin; |
| 1108 | |
| 1109 | if (NILP (pixels)) |
| 1110 | size = Fcons (make_float ((double) width / FRAME_COLUMN_WIDTH (f)), |
| 1111 | make_float ((double) height / FRAME_LINE_HEIGHT (f))); |
| 1112 | else |
| 1113 | size = Fcons (make_number (width), make_number (height)); |
| 1114 | } |
| 1115 | else |
| 1116 | error ("Invalid image specification"); |
| 1117 | |
| 1118 | return size; |
| 1119 | } |
| 1120 | |
| 1121 | |
| 1122 | DEFUN ("image-mask-p", Fimage_mask_p, Simage_mask_p, 1, 2, 0, |
| 1123 | doc: /* Return t if image SPEC has a mask bitmap. |
| 1124 | FRAME is the frame on which the image will be displayed. FRAME nil |
| 1125 | or omitted means use the selected frame. */) |
| 1126 | (spec, frame) |
| 1127 | Lisp_Object spec, frame; |
| 1128 | { |
| 1129 | Lisp_Object mask; |
| 1130 | |
| 1131 | mask = Qnil; |
| 1132 | if (valid_image_p (spec)) |
| 1133 | { |
| 1134 | struct frame *f = check_x_frame (frame); |
| 1135 | int id = lookup_image (f, spec); |
| 1136 | struct image *img = IMAGE_FROM_ID (f, id); |
| 1137 | if (img->mask) |
| 1138 | mask = Qt; |
| 1139 | } |
| 1140 | else |
| 1141 | error ("Invalid image specification"); |
| 1142 | |
| 1143 | return mask; |
| 1144 | } |
| 1145 | |
| 1146 | \f |
| 1147 | /*********************************************************************** |
| 1148 | Image type independent image structures |
| 1149 | ***********************************************************************/ |
| 1150 | |
| 1151 | static struct image *make_image P_ ((Lisp_Object spec, unsigned hash)); |
| 1152 | static void free_image P_ ((struct frame *f, struct image *img)); |
| 1153 | static int check_image_size P_ ((struct frame *f, int width, int height)); |
| 1154 | |
| 1155 | #define MAX_IMAGE_SIZE 6.0 |
| 1156 | Lisp_Object Vmax_image_size; |
| 1157 | |
| 1158 | /* Allocate and return a new image structure for image specification |
| 1159 | SPEC. SPEC has a hash value of HASH. */ |
| 1160 | |
| 1161 | static struct image * |
| 1162 | make_image (spec, hash) |
| 1163 | Lisp_Object spec; |
| 1164 | unsigned hash; |
| 1165 | { |
| 1166 | struct image *img = (struct image *) xmalloc (sizeof *img); |
| 1167 | |
| 1168 | xassert (valid_image_p (spec)); |
| 1169 | bzero (img, sizeof *img); |
| 1170 | img->type = lookup_image_type (image_spec_value (spec, QCtype, NULL)); |
| 1171 | xassert (img->type != NULL); |
| 1172 | img->spec = spec; |
| 1173 | img->data.lisp_val = Qnil; |
| 1174 | img->ascent = DEFAULT_IMAGE_ASCENT; |
| 1175 | img->hash = hash; |
| 1176 | return img; |
| 1177 | } |
| 1178 | |
| 1179 | |
| 1180 | /* Free image IMG which was used on frame F, including its resources. */ |
| 1181 | |
| 1182 | static void |
| 1183 | free_image (f, img) |
| 1184 | struct frame *f; |
| 1185 | struct image *img; |
| 1186 | { |
| 1187 | if (img) |
| 1188 | { |
| 1189 | struct image_cache *c = FRAME_X_IMAGE_CACHE (f); |
| 1190 | |
| 1191 | /* Remove IMG from the hash table of its cache. */ |
| 1192 | if (img->prev) |
| 1193 | img->prev->next = img->next; |
| 1194 | else |
| 1195 | c->buckets[img->hash % IMAGE_CACHE_BUCKETS_SIZE] = img->next; |
| 1196 | |
| 1197 | if (img->next) |
| 1198 | img->next->prev = img->prev; |
| 1199 | |
| 1200 | c->images[img->id] = NULL; |
| 1201 | |
| 1202 | /* Free resources, then free IMG. */ |
| 1203 | img->type->free (f, img); |
| 1204 | xfree (img); |
| 1205 | } |
| 1206 | } |
| 1207 | |
| 1208 | /* Return 1 if the given widths and heights are valid for display; |
| 1209 | otherwise, return 0. */ |
| 1210 | |
| 1211 | int |
| 1212 | check_image_size (f, width, height) |
| 1213 | struct frame *f; |
| 1214 | int width; |
| 1215 | int height; |
| 1216 | { |
| 1217 | int w, h; |
| 1218 | |
| 1219 | if (width <= 0 || height <= 0) |
| 1220 | return 0; |
| 1221 | |
| 1222 | if (INTEGERP (Vmax_image_size)) |
| 1223 | w = h = XINT (Vmax_image_size); |
| 1224 | else if (FLOATP (Vmax_image_size)) |
| 1225 | { |
| 1226 | if (f != NULL) |
| 1227 | { |
| 1228 | w = FRAME_PIXEL_WIDTH (f); |
| 1229 | h = FRAME_PIXEL_HEIGHT (f); |
| 1230 | } |
| 1231 | else |
| 1232 | w = h = 1024; /* Arbitrary size for unknown frame. */ |
| 1233 | w = (int) (XFLOAT_DATA (Vmax_image_size) * w); |
| 1234 | h = (int) (XFLOAT_DATA (Vmax_image_size) * h); |
| 1235 | } |
| 1236 | else |
| 1237 | return 1; |
| 1238 | |
| 1239 | return (width <= w && height <= h); |
| 1240 | } |
| 1241 | |
| 1242 | /* Prepare image IMG for display on frame F. Must be called before |
| 1243 | drawing an image. */ |
| 1244 | |
| 1245 | void |
| 1246 | prepare_image_for_display (f, img) |
| 1247 | struct frame *f; |
| 1248 | struct image *img; |
| 1249 | { |
| 1250 | EMACS_TIME t; |
| 1251 | |
| 1252 | /* We're about to display IMG, so set its timestamp to `now'. */ |
| 1253 | EMACS_GET_TIME (t); |
| 1254 | img->timestamp = EMACS_SECS (t); |
| 1255 | |
| 1256 | /* If IMG doesn't have a pixmap yet, load it now, using the image |
| 1257 | type dependent loader function. */ |
| 1258 | if (img->pixmap == NO_PIXMAP && !img->load_failed_p) |
| 1259 | img->load_failed_p = img->type->load (f, img) == 0; |
| 1260 | |
| 1261 | #if defined (MAC_OS) && USE_CG_DRAWING |
| 1262 | if (!img->load_failed_p && img->data.ptr_val == NULL) |
| 1263 | { |
| 1264 | img->data.ptr_val = mac_create_cg_image_from_image (f, img); |
| 1265 | if (img->data.ptr_val == NULL) |
| 1266 | { |
| 1267 | img->load_failed_p = 1; |
| 1268 | img->type->free (f, img); |
| 1269 | } |
| 1270 | } |
| 1271 | #endif |
| 1272 | } |
| 1273 | |
| 1274 | |
| 1275 | /* Value is the number of pixels for the ascent of image IMG when |
| 1276 | drawn in face FACE. */ |
| 1277 | |
| 1278 | int |
| 1279 | image_ascent (img, face, slice) |
| 1280 | struct image *img; |
| 1281 | struct face *face; |
| 1282 | struct glyph_slice *slice; |
| 1283 | { |
| 1284 | int height; |
| 1285 | int ascent; |
| 1286 | |
| 1287 | if (slice->height == img->height) |
| 1288 | height = img->height + img->vmargin; |
| 1289 | else if (slice->y == 0) |
| 1290 | height = slice->height + img->vmargin; |
| 1291 | else |
| 1292 | height = slice->height; |
| 1293 | |
| 1294 | if (img->ascent == CENTERED_IMAGE_ASCENT) |
| 1295 | { |
| 1296 | if (face->font) |
| 1297 | { |
| 1298 | #ifdef HAVE_NTGUI |
| 1299 | /* W32 specific version. Why?. ++kfs */ |
| 1300 | ascent = height / 2 - (FONT_DESCENT(face->font) |
| 1301 | - FONT_BASE(face->font)) / 2; |
| 1302 | #else |
| 1303 | /* This expression is arranged so that if the image can't be |
| 1304 | exactly centered, it will be moved slightly up. This is |
| 1305 | because a typical font is `top-heavy' (due to the presence |
| 1306 | uppercase letters), so the image placement should err towards |
| 1307 | being top-heavy too. It also just generally looks better. */ |
| 1308 | ascent = (height + face->font->ascent - face->font->descent + 1) / 2; |
| 1309 | #endif /* HAVE_NTGUI */ |
| 1310 | } |
| 1311 | else |
| 1312 | ascent = height / 2; |
| 1313 | } |
| 1314 | else |
| 1315 | ascent = (int) (height * img->ascent / 100.0); |
| 1316 | |
| 1317 | return ascent; |
| 1318 | } |
| 1319 | |
| 1320 | \f |
| 1321 | /* Image background colors. */ |
| 1322 | |
| 1323 | /* Find the "best" corner color of a bitmap. |
| 1324 | On W32, XIMG is assumed to a device context with the bitmap selected. */ |
| 1325 | |
| 1326 | static RGB_PIXEL_COLOR |
| 1327 | four_corners_best (ximg, width, height) |
| 1328 | XImagePtr_or_DC ximg; |
| 1329 | unsigned long width, height; |
| 1330 | { |
| 1331 | RGB_PIXEL_COLOR corners[4], best; |
| 1332 | int i, best_count; |
| 1333 | |
| 1334 | /* Get the colors at the corners of ximg. */ |
| 1335 | corners[0] = GET_PIXEL (ximg, 0, 0); |
| 1336 | corners[1] = GET_PIXEL (ximg, width - 1, 0); |
| 1337 | corners[2] = GET_PIXEL (ximg, width - 1, height - 1); |
| 1338 | corners[3] = GET_PIXEL (ximg, 0, height - 1); |
| 1339 | |
| 1340 | /* Choose the most frequently found color as background. */ |
| 1341 | for (i = best_count = 0; i < 4; ++i) |
| 1342 | { |
| 1343 | int j, n; |
| 1344 | |
| 1345 | for (j = n = 0; j < 4; ++j) |
| 1346 | if (corners[i] == corners[j]) |
| 1347 | ++n; |
| 1348 | |
| 1349 | if (n > best_count) |
| 1350 | best = corners[i], best_count = n; |
| 1351 | } |
| 1352 | |
| 1353 | return best; |
| 1354 | } |
| 1355 | |
| 1356 | /* Portability macros */ |
| 1357 | |
| 1358 | #ifdef HAVE_NTGUI |
| 1359 | |
| 1360 | #define Destroy_Image(img_dc, prev) \ |
| 1361 | do { SelectObject (img_dc, prev); DeleteDC (img_dc); } while (0) |
| 1362 | |
| 1363 | #define Free_Pixmap(display, pixmap) \ |
| 1364 | DeleteObject (pixmap) |
| 1365 | |
| 1366 | #else |
| 1367 | |
| 1368 | #define Destroy_Image(ximg, dummy) \ |
| 1369 | XDestroyImage (ximg) |
| 1370 | |
| 1371 | #define Free_Pixmap(display, pixmap) \ |
| 1372 | XFreePixmap (display, pixmap) |
| 1373 | |
| 1374 | #endif /* HAVE_NTGUI */ |
| 1375 | |
| 1376 | |
| 1377 | /* Return the `background' field of IMG. If IMG doesn't have one yet, |
| 1378 | it is guessed heuristically. If non-zero, XIMG is an existing |
| 1379 | XImage object (or device context with the image selected on W32) to |
| 1380 | use for the heuristic. */ |
| 1381 | |
| 1382 | RGB_PIXEL_COLOR |
| 1383 | image_background (img, f, ximg) |
| 1384 | struct image *img; |
| 1385 | struct frame *f; |
| 1386 | XImagePtr_or_DC ximg; |
| 1387 | { |
| 1388 | if (! img->background_valid) |
| 1389 | /* IMG doesn't have a background yet, try to guess a reasonable value. */ |
| 1390 | { |
| 1391 | int free_ximg = !ximg; |
| 1392 | #ifdef HAVE_NTGUI |
| 1393 | HGDIOBJ prev; |
| 1394 | #endif /* HAVE_NTGUI */ |
| 1395 | |
| 1396 | if (free_ximg) |
| 1397 | { |
| 1398 | #ifndef HAVE_NTGUI |
| 1399 | ximg = XGetImage (FRAME_X_DISPLAY (f), img->pixmap, |
| 1400 | 0, 0, img->width, img->height, ~0, ZPixmap); |
| 1401 | #else |
| 1402 | HDC frame_dc = get_frame_dc (f); |
| 1403 | ximg = CreateCompatibleDC (frame_dc); |
| 1404 | release_frame_dc (f, frame_dc); |
| 1405 | prev = SelectObject (ximg, img->pixmap); |
| 1406 | #endif /* !HAVE_NTGUI */ |
| 1407 | } |
| 1408 | |
| 1409 | img->background = four_corners_best (ximg, img->width, img->height); |
| 1410 | |
| 1411 | if (free_ximg) |
| 1412 | Destroy_Image (ximg, prev); |
| 1413 | |
| 1414 | img->background_valid = 1; |
| 1415 | } |
| 1416 | |
| 1417 | return img->background; |
| 1418 | } |
| 1419 | |
| 1420 | /* Return the `background_transparent' field of IMG. If IMG doesn't |
| 1421 | have one yet, it is guessed heuristically. If non-zero, MASK is an |
| 1422 | existing XImage object to use for the heuristic. */ |
| 1423 | |
| 1424 | int |
| 1425 | image_background_transparent (img, f, mask) |
| 1426 | struct image *img; |
| 1427 | struct frame *f; |
| 1428 | XImagePtr_or_DC mask; |
| 1429 | { |
| 1430 | if (! img->background_transparent_valid) |
| 1431 | /* IMG doesn't have a background yet, try to guess a reasonable value. */ |
| 1432 | { |
| 1433 | if (img->mask) |
| 1434 | { |
| 1435 | int free_mask = !mask; |
| 1436 | #ifdef HAVE_NTGUI |
| 1437 | HGDIOBJ prev; |
| 1438 | #endif /* HAVE_NTGUI */ |
| 1439 | |
| 1440 | if (free_mask) |
| 1441 | { |
| 1442 | #ifndef HAVE_NTGUI |
| 1443 | mask = XGetImage (FRAME_X_DISPLAY (f), img->mask, |
| 1444 | 0, 0, img->width, img->height, ~0, ZPixmap); |
| 1445 | #else |
| 1446 | HDC frame_dc = get_frame_dc (f); |
| 1447 | mask = CreateCompatibleDC (frame_dc); |
| 1448 | release_frame_dc (f, frame_dc); |
| 1449 | prev = SelectObject (mask, img->mask); |
| 1450 | #endif /* HAVE_NTGUI */ |
| 1451 | } |
| 1452 | |
| 1453 | img->background_transparent |
| 1454 | = (four_corners_best (mask, img->width, img->height) == PIX_MASK_RETAIN); |
| 1455 | |
| 1456 | if (free_mask) |
| 1457 | Destroy_Image (mask, prev); |
| 1458 | } |
| 1459 | else |
| 1460 | img->background_transparent = 0; |
| 1461 | |
| 1462 | img->background_transparent_valid = 1; |
| 1463 | } |
| 1464 | |
| 1465 | return img->background_transparent; |
| 1466 | } |
| 1467 | |
| 1468 | \f |
| 1469 | /*********************************************************************** |
| 1470 | Helper functions for X image types |
| 1471 | ***********************************************************************/ |
| 1472 | |
| 1473 | static void x_clear_image_1 P_ ((struct frame *, struct image *, int, |
| 1474 | int, int)); |
| 1475 | static void x_clear_image P_ ((struct frame *f, struct image *img)); |
| 1476 | static unsigned long x_alloc_image_color P_ ((struct frame *f, |
| 1477 | struct image *img, |
| 1478 | Lisp_Object color_name, |
| 1479 | unsigned long dflt)); |
| 1480 | |
| 1481 | |
| 1482 | /* Clear X resources of image IMG on frame F. PIXMAP_P non-zero means |
| 1483 | free the pixmap if any. MASK_P non-zero means clear the mask |
| 1484 | pixmap if any. COLORS_P non-zero means free colors allocated for |
| 1485 | the image, if any. */ |
| 1486 | |
| 1487 | static void |
| 1488 | x_clear_image_1 (f, img, pixmap_p, mask_p, colors_p) |
| 1489 | struct frame *f; |
| 1490 | struct image *img; |
| 1491 | int pixmap_p, mask_p, colors_p; |
| 1492 | { |
| 1493 | if (pixmap_p && img->pixmap) |
| 1494 | { |
| 1495 | Free_Pixmap (FRAME_X_DISPLAY (f), img->pixmap); |
| 1496 | img->pixmap = NO_PIXMAP; |
| 1497 | img->background_valid = 0; |
| 1498 | } |
| 1499 | |
| 1500 | if (mask_p && img->mask) |
| 1501 | { |
| 1502 | Free_Pixmap (FRAME_X_DISPLAY (f), img->mask); |
| 1503 | img->mask = NO_PIXMAP; |
| 1504 | img->background_transparent_valid = 0; |
| 1505 | } |
| 1506 | |
| 1507 | if (colors_p && img->ncolors) |
| 1508 | { |
| 1509 | /* MAC_TODO: color table support. */ |
| 1510 | /* W32_TODO: color table support. */ |
| 1511 | #ifdef HAVE_X_WINDOWS |
| 1512 | x_free_colors (f, img->colors, img->ncolors); |
| 1513 | #endif /* HAVE_X_WINDOWS */ |
| 1514 | xfree (img->colors); |
| 1515 | img->colors = NULL; |
| 1516 | img->ncolors = 0; |
| 1517 | } |
| 1518 | |
| 1519 | #if defined (MAC_OS) && USE_CG_DRAWING |
| 1520 | if (img->data.ptr_val) |
| 1521 | { |
| 1522 | CGImageRelease (img->data.ptr_val); |
| 1523 | img->data.ptr_val = NULL; |
| 1524 | } |
| 1525 | #endif |
| 1526 | } |
| 1527 | |
| 1528 | /* Free X resources of image IMG which is used on frame F. */ |
| 1529 | |
| 1530 | static void |
| 1531 | x_clear_image (f, img) |
| 1532 | struct frame *f; |
| 1533 | struct image *img; |
| 1534 | { |
| 1535 | BLOCK_INPUT; |
| 1536 | x_clear_image_1 (f, img, 1, 1, 1); |
| 1537 | UNBLOCK_INPUT; |
| 1538 | } |
| 1539 | |
| 1540 | |
| 1541 | /* Allocate color COLOR_NAME for image IMG on frame F. If color |
| 1542 | cannot be allocated, use DFLT. Add a newly allocated color to |
| 1543 | IMG->colors, so that it can be freed again. Value is the pixel |
| 1544 | color. */ |
| 1545 | |
| 1546 | static unsigned long |
| 1547 | x_alloc_image_color (f, img, color_name, dflt) |
| 1548 | struct frame *f; |
| 1549 | struct image *img; |
| 1550 | Lisp_Object color_name; |
| 1551 | unsigned long dflt; |
| 1552 | { |
| 1553 | XColor color; |
| 1554 | unsigned long result; |
| 1555 | |
| 1556 | xassert (STRINGP (color_name)); |
| 1557 | |
| 1558 | if (x_defined_color (f, SDATA (color_name), &color, 1)) |
| 1559 | { |
| 1560 | /* This isn't called frequently so we get away with simply |
| 1561 | reallocating the color vector to the needed size, here. */ |
| 1562 | ++img->ncolors; |
| 1563 | img->colors = |
| 1564 | (unsigned long *) xrealloc (img->colors, |
| 1565 | img->ncolors * sizeof *img->colors); |
| 1566 | img->colors[img->ncolors - 1] = color.pixel; |
| 1567 | result = color.pixel; |
| 1568 | } |
| 1569 | else |
| 1570 | result = dflt; |
| 1571 | |
| 1572 | return result; |
| 1573 | } |
| 1574 | |
| 1575 | |
| 1576 | \f |
| 1577 | /*********************************************************************** |
| 1578 | Image Cache |
| 1579 | ***********************************************************************/ |
| 1580 | |
| 1581 | static void cache_image P_ ((struct frame *f, struct image *img)); |
| 1582 | static void postprocess_image P_ ((struct frame *, struct image *)); |
| 1583 | |
| 1584 | /* Return a new, initialized image cache that is allocated from the |
| 1585 | heap. Call free_image_cache to free an image cache. */ |
| 1586 | |
| 1587 | struct image_cache * |
| 1588 | make_image_cache () |
| 1589 | { |
| 1590 | struct image_cache *c = (struct image_cache *) xmalloc (sizeof *c); |
| 1591 | int size; |
| 1592 | |
| 1593 | bzero (c, sizeof *c); |
| 1594 | c->size = 50; |
| 1595 | c->images = (struct image **) xmalloc (c->size * sizeof *c->images); |
| 1596 | size = IMAGE_CACHE_BUCKETS_SIZE * sizeof *c->buckets; |
| 1597 | c->buckets = (struct image **) xmalloc (size); |
| 1598 | bzero (c->buckets, size); |
| 1599 | return c; |
| 1600 | } |
| 1601 | |
| 1602 | |
| 1603 | /* Free image cache of frame F. Be aware that X frames share images |
| 1604 | caches. */ |
| 1605 | |
| 1606 | void |
| 1607 | free_image_cache (f) |
| 1608 | struct frame *f; |
| 1609 | { |
| 1610 | struct image_cache *c = FRAME_X_IMAGE_CACHE (f); |
| 1611 | if (c) |
| 1612 | { |
| 1613 | int i; |
| 1614 | |
| 1615 | /* Cache should not be referenced by any frame when freed. */ |
| 1616 | xassert (c->refcount == 0); |
| 1617 | |
| 1618 | for (i = 0; i < c->used; ++i) |
| 1619 | free_image (f, c->images[i]); |
| 1620 | xfree (c->images); |
| 1621 | xfree (c->buckets); |
| 1622 | xfree (c); |
| 1623 | FRAME_X_IMAGE_CACHE (f) = NULL; |
| 1624 | } |
| 1625 | } |
| 1626 | |
| 1627 | |
| 1628 | /* Clear image cache of frame F. FORCE_P non-zero means free all |
| 1629 | images. FORCE_P zero means clear only images that haven't been |
| 1630 | displayed for some time. Should be called from time to time to |
| 1631 | reduce the number of loaded images. If image-eviction-seconds is |
| 1632 | non-nil, this frees images in the cache which weren't displayed for |
| 1633 | at least that many seconds. */ |
| 1634 | |
| 1635 | void |
| 1636 | clear_image_cache (f, force_p) |
| 1637 | struct frame *f; |
| 1638 | int force_p; |
| 1639 | { |
| 1640 | struct image_cache *c = FRAME_X_IMAGE_CACHE (f); |
| 1641 | |
| 1642 | if (c && INTEGERP (Vimage_cache_eviction_delay)) |
| 1643 | { |
| 1644 | EMACS_TIME t; |
| 1645 | unsigned long old; |
| 1646 | int i, nfreed; |
| 1647 | |
| 1648 | EMACS_GET_TIME (t); |
| 1649 | old = EMACS_SECS (t) - XFASTINT (Vimage_cache_eviction_delay); |
| 1650 | |
| 1651 | /* Block input so that we won't be interrupted by a SIGIO |
| 1652 | while being in an inconsistent state. */ |
| 1653 | BLOCK_INPUT; |
| 1654 | |
| 1655 | for (i = nfreed = 0; i < c->used; ++i) |
| 1656 | { |
| 1657 | struct image *img = c->images[i]; |
| 1658 | if (img != NULL |
| 1659 | && (force_p || img->timestamp < old)) |
| 1660 | { |
| 1661 | free_image (f, img); |
| 1662 | ++nfreed; |
| 1663 | } |
| 1664 | } |
| 1665 | |
| 1666 | /* We may be clearing the image cache because, for example, |
| 1667 | Emacs was iconified for a longer period of time. In that |
| 1668 | case, current matrices may still contain references to |
| 1669 | images freed above. So, clear these matrices. */ |
| 1670 | if (nfreed) |
| 1671 | { |
| 1672 | Lisp_Object tail, frame; |
| 1673 | |
| 1674 | FOR_EACH_FRAME (tail, frame) |
| 1675 | { |
| 1676 | struct frame *f = XFRAME (frame); |
| 1677 | if (FRAME_WINDOW_P (f) |
| 1678 | && FRAME_X_IMAGE_CACHE (f) == c) |
| 1679 | clear_current_matrices (f); |
| 1680 | } |
| 1681 | |
| 1682 | ++windows_or_buffers_changed; |
| 1683 | } |
| 1684 | |
| 1685 | UNBLOCK_INPUT; |
| 1686 | } |
| 1687 | } |
| 1688 | |
| 1689 | |
| 1690 | DEFUN ("clear-image-cache", Fclear_image_cache, Sclear_image_cache, |
| 1691 | 0, 1, 0, |
| 1692 | doc: /* Clear the image cache of FRAME. |
| 1693 | FRAME nil or omitted means use the selected frame. |
| 1694 | FRAME t means clear the image caches of all frames. */) |
| 1695 | (frame) |
| 1696 | Lisp_Object frame; |
| 1697 | { |
| 1698 | if (EQ (frame, Qt)) |
| 1699 | { |
| 1700 | Lisp_Object tail; |
| 1701 | |
| 1702 | FOR_EACH_FRAME (tail, frame) |
| 1703 | if (FRAME_WINDOW_P (XFRAME (frame))) |
| 1704 | clear_image_cache (XFRAME (frame), 1); |
| 1705 | } |
| 1706 | else |
| 1707 | clear_image_cache (check_x_frame (frame), 1); |
| 1708 | |
| 1709 | return Qnil; |
| 1710 | } |
| 1711 | |
| 1712 | |
| 1713 | /* Compute masks and transform image IMG on frame F, as specified |
| 1714 | by the image's specification, */ |
| 1715 | |
| 1716 | static void |
| 1717 | postprocess_image (f, img) |
| 1718 | struct frame *f; |
| 1719 | struct image *img; |
| 1720 | { |
| 1721 | /* Manipulation of the image's mask. */ |
| 1722 | if (img->pixmap) |
| 1723 | { |
| 1724 | Lisp_Object conversion, spec; |
| 1725 | Lisp_Object mask; |
| 1726 | |
| 1727 | spec = img->spec; |
| 1728 | |
| 1729 | /* `:heuristic-mask t' |
| 1730 | `:mask heuristic' |
| 1731 | means build a mask heuristically. |
| 1732 | `:heuristic-mask (R G B)' |
| 1733 | `:mask (heuristic (R G B))' |
| 1734 | means build a mask from color (R G B) in the |
| 1735 | image. |
| 1736 | `:mask nil' |
| 1737 | means remove a mask, if any. */ |
| 1738 | |
| 1739 | mask = image_spec_value (spec, QCheuristic_mask, NULL); |
| 1740 | if (!NILP (mask)) |
| 1741 | x_build_heuristic_mask (f, img, mask); |
| 1742 | else |
| 1743 | { |
| 1744 | int found_p; |
| 1745 | |
| 1746 | mask = image_spec_value (spec, QCmask, &found_p); |
| 1747 | |
| 1748 | if (EQ (mask, Qheuristic)) |
| 1749 | x_build_heuristic_mask (f, img, Qt); |
| 1750 | else if (CONSP (mask) |
| 1751 | && EQ (XCAR (mask), Qheuristic)) |
| 1752 | { |
| 1753 | if (CONSP (XCDR (mask))) |
| 1754 | x_build_heuristic_mask (f, img, XCAR (XCDR (mask))); |
| 1755 | else |
| 1756 | x_build_heuristic_mask (f, img, XCDR (mask)); |
| 1757 | } |
| 1758 | else if (NILP (mask) && found_p && img->mask) |
| 1759 | { |
| 1760 | Free_Pixmap (FRAME_X_DISPLAY (f), img->mask); |
| 1761 | img->mask = NO_PIXMAP; |
| 1762 | } |
| 1763 | } |
| 1764 | |
| 1765 | |
| 1766 | /* Should we apply an image transformation algorithm? */ |
| 1767 | conversion = image_spec_value (spec, QCconversion, NULL); |
| 1768 | if (EQ (conversion, Qdisabled)) |
| 1769 | x_disable_image (f, img); |
| 1770 | else if (EQ (conversion, Qlaplace)) |
| 1771 | x_laplace (f, img); |
| 1772 | else if (EQ (conversion, Qemboss)) |
| 1773 | x_emboss (f, img); |
| 1774 | else if (CONSP (conversion) |
| 1775 | && EQ (XCAR (conversion), Qedge_detection)) |
| 1776 | { |
| 1777 | Lisp_Object tem; |
| 1778 | tem = XCDR (conversion); |
| 1779 | if (CONSP (tem)) |
| 1780 | x_edge_detection (f, img, |
| 1781 | Fplist_get (tem, QCmatrix), |
| 1782 | Fplist_get (tem, QCcolor_adjustment)); |
| 1783 | } |
| 1784 | } |
| 1785 | } |
| 1786 | |
| 1787 | |
| 1788 | /* Return the id of image with Lisp specification SPEC on frame F. |
| 1789 | SPEC must be a valid Lisp image specification (see valid_image_p). */ |
| 1790 | |
| 1791 | int |
| 1792 | lookup_image (f, spec) |
| 1793 | struct frame *f; |
| 1794 | Lisp_Object spec; |
| 1795 | { |
| 1796 | struct image_cache *c = FRAME_X_IMAGE_CACHE (f); |
| 1797 | struct image *img; |
| 1798 | int i; |
| 1799 | unsigned hash; |
| 1800 | struct gcpro gcpro1; |
| 1801 | EMACS_TIME now; |
| 1802 | |
| 1803 | /* F must be a window-system frame, and SPEC must be a valid image |
| 1804 | specification. */ |
| 1805 | xassert (FRAME_WINDOW_P (f)); |
| 1806 | xassert (valid_image_p (spec)); |
| 1807 | |
| 1808 | GCPRO1 (spec); |
| 1809 | |
| 1810 | /* Look up SPEC in the hash table of the image cache. */ |
| 1811 | hash = sxhash (spec, 0); |
| 1812 | i = hash % IMAGE_CACHE_BUCKETS_SIZE; |
| 1813 | |
| 1814 | for (img = c->buckets[i]; img; img = img->next) |
| 1815 | if (img->hash == hash && !NILP (Fequal (img->spec, spec))) |
| 1816 | break; |
| 1817 | |
| 1818 | if (img && img->load_failed_p) |
| 1819 | { |
| 1820 | free_image (f, img); |
| 1821 | img = NULL; |
| 1822 | } |
| 1823 | |
| 1824 | /* If not found, create a new image and cache it. */ |
| 1825 | if (img == NULL) |
| 1826 | { |
| 1827 | extern Lisp_Object Qpostscript; |
| 1828 | |
| 1829 | BLOCK_INPUT; |
| 1830 | img = make_image (spec, hash); |
| 1831 | cache_image (f, img); |
| 1832 | img->load_failed_p = img->type->load (f, img) == 0; |
| 1833 | |
| 1834 | /* If we can't load the image, and we don't have a width and |
| 1835 | height, use some arbitrary width and height so that we can |
| 1836 | draw a rectangle for it. */ |
| 1837 | if (img->load_failed_p) |
| 1838 | { |
| 1839 | Lisp_Object value; |
| 1840 | |
| 1841 | value = image_spec_value (spec, QCwidth, NULL); |
| 1842 | img->width = (INTEGERP (value) |
| 1843 | ? XFASTINT (value) : DEFAULT_IMAGE_WIDTH); |
| 1844 | value = image_spec_value (spec, QCheight, NULL); |
| 1845 | img->height = (INTEGERP (value) |
| 1846 | ? XFASTINT (value) : DEFAULT_IMAGE_HEIGHT); |
| 1847 | } |
| 1848 | else |
| 1849 | { |
| 1850 | /* Handle image type independent image attributes |
| 1851 | `:ascent ASCENT', `:margin MARGIN', `:relief RELIEF', |
| 1852 | `:background COLOR'. */ |
| 1853 | Lisp_Object ascent, margin, relief, bg; |
| 1854 | |
| 1855 | ascent = image_spec_value (spec, QCascent, NULL); |
| 1856 | if (INTEGERP (ascent)) |
| 1857 | img->ascent = XFASTINT (ascent); |
| 1858 | else if (EQ (ascent, Qcenter)) |
| 1859 | img->ascent = CENTERED_IMAGE_ASCENT; |
| 1860 | |
| 1861 | margin = image_spec_value (spec, QCmargin, NULL); |
| 1862 | if (INTEGERP (margin) && XINT (margin) >= 0) |
| 1863 | img->vmargin = img->hmargin = XFASTINT (margin); |
| 1864 | else if (CONSP (margin) && INTEGERP (XCAR (margin)) |
| 1865 | && INTEGERP (XCDR (margin))) |
| 1866 | { |
| 1867 | if (XINT (XCAR (margin)) > 0) |
| 1868 | img->hmargin = XFASTINT (XCAR (margin)); |
| 1869 | if (XINT (XCDR (margin)) > 0) |
| 1870 | img->vmargin = XFASTINT (XCDR (margin)); |
| 1871 | } |
| 1872 | |
| 1873 | relief = image_spec_value (spec, QCrelief, NULL); |
| 1874 | if (INTEGERP (relief)) |
| 1875 | { |
| 1876 | img->relief = XINT (relief); |
| 1877 | img->hmargin += abs (img->relief); |
| 1878 | img->vmargin += abs (img->relief); |
| 1879 | } |
| 1880 | |
| 1881 | if (! img->background_valid) |
| 1882 | { |
| 1883 | bg = image_spec_value (img->spec, QCbackground, NULL); |
| 1884 | if (!NILP (bg)) |
| 1885 | { |
| 1886 | img->background |
| 1887 | = x_alloc_image_color (f, img, bg, |
| 1888 | FRAME_BACKGROUND_PIXEL (f)); |
| 1889 | img->background_valid = 1; |
| 1890 | } |
| 1891 | } |
| 1892 | |
| 1893 | /* Do image transformations and compute masks, unless we |
| 1894 | don't have the image yet. */ |
| 1895 | if (!EQ (*img->type->type, Qpostscript)) |
| 1896 | postprocess_image (f, img); |
| 1897 | } |
| 1898 | |
| 1899 | UNBLOCK_INPUT; |
| 1900 | } |
| 1901 | |
| 1902 | /* We're using IMG, so set its timestamp to `now'. */ |
| 1903 | EMACS_GET_TIME (now); |
| 1904 | img->timestamp = EMACS_SECS (now); |
| 1905 | |
| 1906 | UNGCPRO; |
| 1907 | |
| 1908 | /* Value is the image id. */ |
| 1909 | return img->id; |
| 1910 | } |
| 1911 | |
| 1912 | |
| 1913 | /* Cache image IMG in the image cache of frame F. */ |
| 1914 | |
| 1915 | static void |
| 1916 | cache_image (f, img) |
| 1917 | struct frame *f; |
| 1918 | struct image *img; |
| 1919 | { |
| 1920 | struct image_cache *c = FRAME_X_IMAGE_CACHE (f); |
| 1921 | int i; |
| 1922 | |
| 1923 | /* Find a free slot in c->images. */ |
| 1924 | for (i = 0; i < c->used; ++i) |
| 1925 | if (c->images[i] == NULL) |
| 1926 | break; |
| 1927 | |
| 1928 | /* If no free slot found, maybe enlarge c->images. */ |
| 1929 | if (i == c->used && c->used == c->size) |
| 1930 | { |
| 1931 | c->size *= 2; |
| 1932 | c->images = (struct image **) xrealloc (c->images, |
| 1933 | c->size * sizeof *c->images); |
| 1934 | } |
| 1935 | |
| 1936 | /* Add IMG to c->images, and assign IMG an id. */ |
| 1937 | c->images[i] = img; |
| 1938 | img->id = i; |
| 1939 | if (i == c->used) |
| 1940 | ++c->used; |
| 1941 | |
| 1942 | /* Add IMG to the cache's hash table. */ |
| 1943 | i = img->hash % IMAGE_CACHE_BUCKETS_SIZE; |
| 1944 | img->next = c->buckets[i]; |
| 1945 | if (img->next) |
| 1946 | img->next->prev = img; |
| 1947 | img->prev = NULL; |
| 1948 | c->buckets[i] = img; |
| 1949 | } |
| 1950 | |
| 1951 | |
| 1952 | /* Call FN on every image in the image cache of frame F. Used to mark |
| 1953 | Lisp Objects in the image cache. */ |
| 1954 | |
| 1955 | void |
| 1956 | forall_images_in_image_cache (f, fn) |
| 1957 | struct frame *f; |
| 1958 | void (*fn) P_ ((struct image *img)); |
| 1959 | { |
| 1960 | if (FRAME_LIVE_P (f) && FRAME_WINDOW_P (f)) |
| 1961 | { |
| 1962 | struct image_cache *c = FRAME_X_IMAGE_CACHE (f); |
| 1963 | if (c) |
| 1964 | { |
| 1965 | int i; |
| 1966 | for (i = 0; i < c->used; ++i) |
| 1967 | if (c->images[i]) |
| 1968 | fn (c->images[i]); |
| 1969 | } |
| 1970 | } |
| 1971 | } |
| 1972 | |
| 1973 | |
| 1974 | \f |
| 1975 | /*********************************************************************** |
| 1976 | X / MAC / W32 support code |
| 1977 | ***********************************************************************/ |
| 1978 | |
| 1979 | #ifdef HAVE_NTGUI |
| 1980 | |
| 1981 | /* Macro for defining functions that will be loaded from image DLLs. */ |
| 1982 | #define DEF_IMGLIB_FN(func) int (FAR CDECL *fn_##func)() |
| 1983 | |
| 1984 | /* Macro for loading those image functions from the library. */ |
| 1985 | #define LOAD_IMGLIB_FN(lib,func) { \ |
| 1986 | fn_##func = (void *) GetProcAddress (lib, #func); \ |
| 1987 | if (!fn_##func) return 0; \ |
| 1988 | } |
| 1989 | |
| 1990 | /* Load a DLL implementing an image type. |
| 1991 | The `image-library-alist' variable associates a symbol, |
| 1992 | identifying an image type, to a list of possible filenames. |
| 1993 | The function returns NULL if no library could be loaded for |
| 1994 | the given image type, or if the library was previously loaded; |
| 1995 | else the handle of the DLL. */ |
| 1996 | static HMODULE |
| 1997 | w32_delayed_load (Lisp_Object libraries, Lisp_Object type) |
| 1998 | { |
| 1999 | HMODULE library = NULL; |
| 2000 | |
| 2001 | if (CONSP (libraries) && NILP (Fassq (type, Vimage_type_cache))) |
| 2002 | { |
| 2003 | Lisp_Object dlls = Fassq (type, libraries); |
| 2004 | |
| 2005 | if (CONSP (dlls)) |
| 2006 | for (dlls = XCDR (dlls); CONSP (dlls); dlls = XCDR (dlls)) |
| 2007 | { |
| 2008 | CHECK_STRING_CAR (dlls); |
| 2009 | if (library = LoadLibrary (SDATA (XCAR (dlls)))) |
| 2010 | break; |
| 2011 | } |
| 2012 | } |
| 2013 | |
| 2014 | return library; |
| 2015 | } |
| 2016 | |
| 2017 | #endif /* HAVE_NTGUI */ |
| 2018 | |
| 2019 | static int x_create_x_image_and_pixmap P_ ((struct frame *, int, int, int, |
| 2020 | XImagePtr *, Pixmap *)); |
| 2021 | static void x_destroy_x_image P_ ((XImagePtr)); |
| 2022 | static void x_put_x_image P_ ((struct frame *, XImagePtr, Pixmap, int, int)); |
| 2023 | |
| 2024 | |
| 2025 | /* Create an XImage and a pixmap of size WIDTH x HEIGHT for use on |
| 2026 | frame F. Set *XIMG and *PIXMAP to the XImage and Pixmap created. |
| 2027 | Set (*XIMG)->data to a raster of WIDTH x HEIGHT pixels allocated |
| 2028 | via xmalloc. Print error messages via image_error if an error |
| 2029 | occurs. Value is non-zero if successful. |
| 2030 | |
| 2031 | On W32, a DEPTH of zero signifies a 24 bit image, otherwise DEPTH |
| 2032 | should indicate the bit depth of the image. */ |
| 2033 | |
| 2034 | static int |
| 2035 | x_create_x_image_and_pixmap (f, width, height, depth, ximg, pixmap) |
| 2036 | struct frame *f; |
| 2037 | int width, height, depth; |
| 2038 | XImagePtr *ximg; |
| 2039 | Pixmap *pixmap; |
| 2040 | { |
| 2041 | #ifdef HAVE_X_WINDOWS |
| 2042 | Display *display = FRAME_X_DISPLAY (f); |
| 2043 | Window window = FRAME_X_WINDOW (f); |
| 2044 | Screen *screen = FRAME_X_SCREEN (f); |
| 2045 | |
| 2046 | xassert (interrupt_input_blocked); |
| 2047 | |
| 2048 | if (depth <= 0) |
| 2049 | depth = DefaultDepthOfScreen (screen); |
| 2050 | *ximg = XCreateImage (display, DefaultVisualOfScreen (screen), |
| 2051 | depth, ZPixmap, 0, NULL, width, height, |
| 2052 | depth > 16 ? 32 : depth > 8 ? 16 : 8, 0); |
| 2053 | if (*ximg == NULL) |
| 2054 | { |
| 2055 | image_error ("Unable to allocate X image", Qnil, Qnil); |
| 2056 | return 0; |
| 2057 | } |
| 2058 | |
| 2059 | /* Allocate image raster. */ |
| 2060 | (*ximg)->data = (char *) xmalloc ((*ximg)->bytes_per_line * height); |
| 2061 | |
| 2062 | /* Allocate a pixmap of the same size. */ |
| 2063 | *pixmap = XCreatePixmap (display, window, width, height, depth); |
| 2064 | if (*pixmap == NO_PIXMAP) |
| 2065 | { |
| 2066 | x_destroy_x_image (*ximg); |
| 2067 | *ximg = NULL; |
| 2068 | image_error ("Unable to create X pixmap", Qnil, Qnil); |
| 2069 | return 0; |
| 2070 | } |
| 2071 | |
| 2072 | return 1; |
| 2073 | #endif /* HAVE_X_WINDOWS */ |
| 2074 | |
| 2075 | #ifdef HAVE_NTGUI |
| 2076 | |
| 2077 | BITMAPINFOHEADER *header; |
| 2078 | HDC hdc; |
| 2079 | int scanline_width_bits; |
| 2080 | int remainder; |
| 2081 | int palette_colors = 0; |
| 2082 | |
| 2083 | if (depth == 0) |
| 2084 | depth = 24; |
| 2085 | |
| 2086 | if (depth != 1 && depth != 4 && depth != 8 |
| 2087 | && depth != 16 && depth != 24 && depth != 32) |
| 2088 | { |
| 2089 | image_error ("Invalid image bit depth specified", Qnil, Qnil); |
| 2090 | return 0; |
| 2091 | } |
| 2092 | |
| 2093 | scanline_width_bits = width * depth; |
| 2094 | remainder = scanline_width_bits % 32; |
| 2095 | |
| 2096 | if (remainder) |
| 2097 | scanline_width_bits += 32 - remainder; |
| 2098 | |
| 2099 | /* Bitmaps with a depth less than 16 need a palette. */ |
| 2100 | /* BITMAPINFO structure already contains the first RGBQUAD. */ |
| 2101 | if (depth < 16) |
| 2102 | palette_colors = 1 << depth - 1; |
| 2103 | |
| 2104 | *ximg = xmalloc (sizeof (XImage) + palette_colors * sizeof (RGBQUAD)); |
| 2105 | if (*ximg == NULL) |
| 2106 | { |
| 2107 | image_error ("Unable to allocate memory for XImage", Qnil, Qnil); |
| 2108 | return 0; |
| 2109 | } |
| 2110 | |
| 2111 | header = &((*ximg)->info.bmiHeader); |
| 2112 | bzero (&((*ximg)->info), sizeof (BITMAPINFO)); |
| 2113 | header->biSize = sizeof (*header); |
| 2114 | header->biWidth = width; |
| 2115 | header->biHeight = -height; /* negative indicates a top-down bitmap. */ |
| 2116 | header->biPlanes = 1; |
| 2117 | header->biBitCount = depth; |
| 2118 | header->biCompression = BI_RGB; |
| 2119 | header->biClrUsed = palette_colors; |
| 2120 | |
| 2121 | /* TODO: fill in palette. */ |
| 2122 | if (depth == 1) |
| 2123 | { |
| 2124 | (*ximg)->info.bmiColors[0].rgbBlue = 0; |
| 2125 | (*ximg)->info.bmiColors[0].rgbGreen = 0; |
| 2126 | (*ximg)->info.bmiColors[0].rgbRed = 0; |
| 2127 | (*ximg)->info.bmiColors[0].rgbReserved = 0; |
| 2128 | (*ximg)->info.bmiColors[1].rgbBlue = 255; |
| 2129 | (*ximg)->info.bmiColors[1].rgbGreen = 255; |
| 2130 | (*ximg)->info.bmiColors[1].rgbRed = 255; |
| 2131 | (*ximg)->info.bmiColors[1].rgbReserved = 0; |
| 2132 | } |
| 2133 | |
| 2134 | hdc = get_frame_dc (f); |
| 2135 | |
| 2136 | /* Create a DIBSection and raster array for the bitmap, |
| 2137 | and store its handle in *pixmap. */ |
| 2138 | *pixmap = CreateDIBSection (hdc, &((*ximg)->info), |
| 2139 | (depth < 16) ? DIB_PAL_COLORS : DIB_RGB_COLORS, |
| 2140 | /* casting avoids a GCC warning */ |
| 2141 | (void **)&((*ximg)->data), NULL, 0); |
| 2142 | |
| 2143 | /* Realize display palette and garbage all frames. */ |
| 2144 | release_frame_dc (f, hdc); |
| 2145 | |
| 2146 | if (*pixmap == NULL) |
| 2147 | { |
| 2148 | DWORD err = GetLastError(); |
| 2149 | Lisp_Object errcode; |
| 2150 | /* All system errors are < 10000, so the following is safe. */ |
| 2151 | XSETINT (errcode, (int) err); |
| 2152 | image_error ("Unable to create bitmap, error code %d", errcode, Qnil); |
| 2153 | x_destroy_x_image (*ximg); |
| 2154 | return 0; |
| 2155 | } |
| 2156 | |
| 2157 | return 1; |
| 2158 | |
| 2159 | #endif /* HAVE_NTGUI */ |
| 2160 | |
| 2161 | #ifdef MAC_OS |
| 2162 | Display *display = FRAME_X_DISPLAY (f); |
| 2163 | Window window = FRAME_X_WINDOW (f); |
| 2164 | |
| 2165 | xassert (interrupt_input_blocked); |
| 2166 | |
| 2167 | /* Allocate a pixmap of the same size. */ |
| 2168 | *pixmap = XCreatePixmap (display, window, width, height, depth); |
| 2169 | if (*pixmap == NO_PIXMAP) |
| 2170 | { |
| 2171 | *ximg = NULL; |
| 2172 | image_error ("Unable to create X pixmap", Qnil, Qnil); |
| 2173 | return 0; |
| 2174 | } |
| 2175 | |
| 2176 | LockPixels (GetGWorldPixMap (*pixmap)); |
| 2177 | *ximg = *pixmap; |
| 2178 | return 1; |
| 2179 | |
| 2180 | #endif /* MAC_OS */ |
| 2181 | } |
| 2182 | |
| 2183 | |
| 2184 | /* Destroy XImage XIMG. Free XIMG->data. */ |
| 2185 | |
| 2186 | static void |
| 2187 | x_destroy_x_image (ximg) |
| 2188 | XImagePtr ximg; |
| 2189 | { |
| 2190 | xassert (interrupt_input_blocked); |
| 2191 | if (ximg) |
| 2192 | { |
| 2193 | #ifdef HAVE_X_WINDOWS |
| 2194 | xfree (ximg->data); |
| 2195 | ximg->data = NULL; |
| 2196 | XDestroyImage (ximg); |
| 2197 | #endif /* HAVE_X_WINDOWS */ |
| 2198 | #ifdef HAVE_NTGUI |
| 2199 | /* Data will be freed by DestroyObject. */ |
| 2200 | ximg->data = NULL; |
| 2201 | xfree (ximg); |
| 2202 | #endif /* HAVE_NTGUI */ |
| 2203 | #ifdef MAC_OS |
| 2204 | XDestroyImage (ximg); |
| 2205 | #endif /* MAC_OS */ |
| 2206 | } |
| 2207 | } |
| 2208 | |
| 2209 | |
| 2210 | /* Put XImage XIMG into pixmap PIXMAP on frame F. WIDTH and HEIGHT |
| 2211 | are width and height of both the image and pixmap. */ |
| 2212 | |
| 2213 | static void |
| 2214 | x_put_x_image (f, ximg, pixmap, width, height) |
| 2215 | struct frame *f; |
| 2216 | XImagePtr ximg; |
| 2217 | Pixmap pixmap; |
| 2218 | int width, height; |
| 2219 | { |
| 2220 | #ifdef HAVE_X_WINDOWS |
| 2221 | GC gc; |
| 2222 | |
| 2223 | xassert (interrupt_input_blocked); |
| 2224 | gc = XCreateGC (FRAME_X_DISPLAY (f), pixmap, 0, NULL); |
| 2225 | XPutImage (FRAME_X_DISPLAY (f), pixmap, gc, ximg, 0, 0, 0, 0, width, height); |
| 2226 | XFreeGC (FRAME_X_DISPLAY (f), gc); |
| 2227 | #endif /* HAVE_X_WINDOWS */ |
| 2228 | |
| 2229 | #ifdef HAVE_NTGUI |
| 2230 | #if 0 /* I don't think this is necessary looking at where it is used. */ |
| 2231 | HDC hdc = get_frame_dc (f); |
| 2232 | SetDIBits (hdc, pixmap, 0, height, ximg->data, &(ximg->info), DIB_RGB_COLORS); |
| 2233 | release_frame_dc (f, hdc); |
| 2234 | #endif |
| 2235 | #endif /* HAVE_NTGUI */ |
| 2236 | |
| 2237 | #ifdef MAC_OS |
| 2238 | xassert (ximg == pixmap); |
| 2239 | #endif /* MAC_OS */ |
| 2240 | } |
| 2241 | |
| 2242 | \f |
| 2243 | /*********************************************************************** |
| 2244 | File Handling |
| 2245 | ***********************************************************************/ |
| 2246 | |
| 2247 | static unsigned char *slurp_file P_ ((char *, int *)); |
| 2248 | |
| 2249 | |
| 2250 | /* Find image file FILE. Look in data-directory, then |
| 2251 | x-bitmap-file-path. Value is the encoded full name of the file |
| 2252 | found, or nil if not found. */ |
| 2253 | |
| 2254 | Lisp_Object |
| 2255 | x_find_image_file (file) |
| 2256 | Lisp_Object file; |
| 2257 | { |
| 2258 | Lisp_Object file_found, search_path; |
| 2259 | struct gcpro gcpro1, gcpro2; |
| 2260 | int fd; |
| 2261 | |
| 2262 | file_found = Qnil; |
| 2263 | search_path = Fcons (Vdata_directory, Vx_bitmap_file_path); |
| 2264 | GCPRO2 (file_found, search_path); |
| 2265 | |
| 2266 | /* Try to find FILE in data-directory, then x-bitmap-file-path. */ |
| 2267 | fd = openp (search_path, file, Qnil, &file_found, Qnil); |
| 2268 | |
| 2269 | if (fd == -1) |
| 2270 | file_found = Qnil; |
| 2271 | else |
| 2272 | { |
| 2273 | file_found = ENCODE_FILE (file_found); |
| 2274 | close (fd); |
| 2275 | } |
| 2276 | |
| 2277 | UNGCPRO; |
| 2278 | return file_found; |
| 2279 | } |
| 2280 | |
| 2281 | |
| 2282 | /* Read FILE into memory. Value is a pointer to a buffer allocated |
| 2283 | with xmalloc holding FILE's contents. Value is null if an error |
| 2284 | occurred. *SIZE is set to the size of the file. */ |
| 2285 | |
| 2286 | static unsigned char * |
| 2287 | slurp_file (file, size) |
| 2288 | char *file; |
| 2289 | int *size; |
| 2290 | { |
| 2291 | FILE *fp = NULL; |
| 2292 | unsigned char *buf = NULL; |
| 2293 | struct stat st; |
| 2294 | |
| 2295 | if (stat (file, &st) == 0 |
| 2296 | && (fp = fopen (file, "rb")) != NULL |
| 2297 | && (buf = (unsigned char *) xmalloc (st.st_size), |
| 2298 | fread (buf, 1, st.st_size, fp) == st.st_size)) |
| 2299 | { |
| 2300 | *size = st.st_size; |
| 2301 | fclose (fp); |
| 2302 | } |
| 2303 | else |
| 2304 | { |
| 2305 | if (fp) |
| 2306 | fclose (fp); |
| 2307 | if (buf) |
| 2308 | { |
| 2309 | xfree (buf); |
| 2310 | buf = NULL; |
| 2311 | } |
| 2312 | } |
| 2313 | |
| 2314 | return buf; |
| 2315 | } |
| 2316 | |
| 2317 | |
| 2318 | \f |
| 2319 | #ifdef MAC_OS |
| 2320 | |
| 2321 | /*********************************************************************** |
| 2322 | MAC Image Load Functions |
| 2323 | ***********************************************************************/ |
| 2324 | |
| 2325 | static int image_load_quicktime P_ ((struct frame *, struct image *img, |
| 2326 | OSType)); |
| 2327 | #ifdef MAC_OSX |
| 2328 | static int image_load_quartz2d P_ ((struct frame *, struct image *img, int)); |
| 2329 | #endif |
| 2330 | |
| 2331 | static OSErr |
| 2332 | find_image_fsspec (specified_file, file, fss) |
| 2333 | Lisp_Object specified_file, *file; |
| 2334 | FSSpec *fss; |
| 2335 | { |
| 2336 | OSErr err; |
| 2337 | AEDesc desc; |
| 2338 | |
| 2339 | *file = x_find_image_file (specified_file); |
| 2340 | if (!STRINGP (*file)) |
| 2341 | return fnfErr; /* file or directory not found; |
| 2342 | incomplete pathname */ |
| 2343 | /* Try to open the image file. */ |
| 2344 | err = AECoercePtr (TYPE_FILE_NAME, SDATA (*file), |
| 2345 | SBYTES (*file), typeFSS, &desc); |
| 2346 | if (err == noErr) |
| 2347 | { |
| 2348 | #if TARGET_API_MAC_CARBON |
| 2349 | err = AEGetDescData (&desc, fss, sizeof (FSSpec)); |
| 2350 | #else |
| 2351 | *fss = *(FSSpec *)(*(desc.dataHandle)); |
| 2352 | #endif |
| 2353 | AEDisposeDesc (&desc); |
| 2354 | } |
| 2355 | return err; |
| 2356 | } |
| 2357 | |
| 2358 | static int |
| 2359 | image_load_qt_1 (f, img, type, fss, dh) |
| 2360 | struct frame *f; |
| 2361 | struct image *img; |
| 2362 | OSType type; |
| 2363 | FSSpec *fss; |
| 2364 | Handle dh; |
| 2365 | { |
| 2366 | OSErr err; |
| 2367 | GraphicsImportComponent gi; |
| 2368 | Rect rect; |
| 2369 | int width, height; |
| 2370 | ImageDescriptionHandle desc_handle; |
| 2371 | short draw_all_pixels; |
| 2372 | Lisp_Object specified_bg; |
| 2373 | XColor color; |
| 2374 | XImagePtr ximg; |
| 2375 | RGBColor bg_color; |
| 2376 | |
| 2377 | err = OpenADefaultComponent (GraphicsImporterComponentType, |
| 2378 | type, &gi); |
| 2379 | if (err != noErr) |
| 2380 | { |
| 2381 | image_error ("Cannot get importer component for `%s'", img->spec, Qnil); |
| 2382 | return 0; |
| 2383 | } |
| 2384 | if (dh == NULL) |
| 2385 | { |
| 2386 | /* read from file system spec */ |
| 2387 | err = GraphicsImportSetDataFile (gi, fss); |
| 2388 | if (err != noErr) |
| 2389 | { |
| 2390 | image_error ("Cannot set fsspec to graphics importer for '%s'", |
| 2391 | img->spec, Qnil); |
| 2392 | goto error; |
| 2393 | } |
| 2394 | } |
| 2395 | else |
| 2396 | { |
| 2397 | /* read from data handle */ |
| 2398 | err = GraphicsImportSetDataHandle (gi, dh); |
| 2399 | if (err != noErr) |
| 2400 | { |
| 2401 | image_error ("Cannot set data handle to graphics importer for `%s'", |
| 2402 | img->spec, Qnil); |
| 2403 | goto error; |
| 2404 | } |
| 2405 | } |
| 2406 | err = GraphicsImportGetImageDescription (gi, &desc_handle); |
| 2407 | if (err != noErr || desc_handle == NULL) |
| 2408 | { |
| 2409 | image_error ("Error reading `%s'", img->spec, Qnil); |
| 2410 | goto error; |
| 2411 | } |
| 2412 | width = img->width = (*desc_handle)->width; |
| 2413 | height = img->height = (*desc_handle)->height; |
| 2414 | DisposeHandle ((Handle)desc_handle); |
| 2415 | |
| 2416 | if (!check_image_size (f, width, height)) |
| 2417 | { |
| 2418 | image_error ("Invalid image size", Qnil, Qnil); |
| 2419 | goto error; |
| 2420 | } |
| 2421 | |
| 2422 | err = GraphicsImportDoesDrawAllPixels (gi, &draw_all_pixels); |
| 2423 | #if 0 |
| 2424 | /* Don't check the error code here. It may have an undocumented |
| 2425 | value -32766. */ |
| 2426 | if (err != noErr) |
| 2427 | { |
| 2428 | image_error ("Error reading `%s'", img->spec, Qnil); |
| 2429 | goto error; |
| 2430 | } |
| 2431 | #endif |
| 2432 | if (draw_all_pixels != graphicsImporterDrawsAllPixels) |
| 2433 | { |
| 2434 | specified_bg = image_spec_value (img->spec, QCbackground, NULL); |
| 2435 | if (!STRINGP (specified_bg) || |
| 2436 | !mac_defined_color (f, SDATA (specified_bg), &color, 0)) |
| 2437 | { |
| 2438 | color.pixel = FRAME_BACKGROUND_PIXEL (f); |
| 2439 | color.red = RED16_FROM_ULONG (color.pixel); |
| 2440 | color.green = GREEN16_FROM_ULONG (color.pixel); |
| 2441 | color.blue = BLUE16_FROM_ULONG (color.pixel); |
| 2442 | } |
| 2443 | } |
| 2444 | |
| 2445 | if (!x_create_x_image_and_pixmap (f, width, height, 0, &ximg, &img->pixmap)) |
| 2446 | goto error; |
| 2447 | if (draw_all_pixels != graphicsImporterDrawsAllPixels) |
| 2448 | { |
| 2449 | CGrafPtr old_port; |
| 2450 | GDHandle old_gdh; |
| 2451 | |
| 2452 | GetGWorld (&old_port, &old_gdh); |
| 2453 | SetGWorld (ximg, NULL); |
| 2454 | bg_color.red = color.red; |
| 2455 | bg_color.green = color.green; |
| 2456 | bg_color.blue = color.blue; |
| 2457 | RGBBackColor (&bg_color); |
| 2458 | #if TARGET_API_MAC_CARBON |
| 2459 | GetPortBounds (ximg, &rect); |
| 2460 | EraseRect (&rect); |
| 2461 | #else |
| 2462 | EraseRect (&(ximg->portRect)); |
| 2463 | #endif |
| 2464 | SetGWorld (old_port, old_gdh); |
| 2465 | } |
| 2466 | GraphicsImportSetGWorld (gi, ximg, NULL); |
| 2467 | GraphicsImportDraw (gi); |
| 2468 | CloseComponent (gi); |
| 2469 | |
| 2470 | /* Maybe fill in the background field while we have ximg handy. */ |
| 2471 | if (NILP (image_spec_value (img->spec, QCbackground, NULL))) |
| 2472 | IMAGE_BACKGROUND (img, f, ximg); |
| 2473 | |
| 2474 | /* Put the image into the pixmap. */ |
| 2475 | x_put_x_image (f, ximg, img->pixmap, width, height); |
| 2476 | x_destroy_x_image (ximg); |
| 2477 | return 1; |
| 2478 | |
| 2479 | error: |
| 2480 | CloseComponent (gi); |
| 2481 | return 0; |
| 2482 | } |
| 2483 | |
| 2484 | |
| 2485 | /* Load an image using the QuickTime Graphics Importer. |
| 2486 | Note: The alpha channel does not work for PNG images. */ |
| 2487 | static int |
| 2488 | image_load_quicktime (f, img, type) |
| 2489 | struct frame *f; |
| 2490 | struct image *img; |
| 2491 | OSType type; |
| 2492 | { |
| 2493 | Lisp_Object specified_file; |
| 2494 | Lisp_Object specified_data; |
| 2495 | OSErr err; |
| 2496 | |
| 2497 | specified_file = image_spec_value (img->spec, QCfile, NULL); |
| 2498 | specified_data = image_spec_value (img->spec, QCdata, NULL); |
| 2499 | |
| 2500 | if (NILP (specified_data)) |
| 2501 | { |
| 2502 | /* Read from a file */ |
| 2503 | Lisp_Object file; |
| 2504 | FSSpec fss; |
| 2505 | |
| 2506 | err = find_image_fsspec (specified_file, &file, &fss); |
| 2507 | if (err != noErr) |
| 2508 | { |
| 2509 | if (err == fnfErr) |
| 2510 | image_error ("Cannot find image file `%s'", specified_file, Qnil); |
| 2511 | else |
| 2512 | image_error ("Cannot open `%s'", file, Qnil); |
| 2513 | return 0; |
| 2514 | } |
| 2515 | return image_load_qt_1 (f, img, type, &fss, NULL); |
| 2516 | } |
| 2517 | else |
| 2518 | { |
| 2519 | /* Memory source! */ |
| 2520 | int success_p; |
| 2521 | Handle dh; |
| 2522 | |
| 2523 | err = PtrToHand (SDATA (specified_data), &dh, SBYTES (specified_data)); |
| 2524 | if (err != noErr) |
| 2525 | { |
| 2526 | image_error ("Cannot allocate data handle for `%s'", |
| 2527 | img->spec, Qnil); |
| 2528 | return 0; |
| 2529 | } |
| 2530 | success_p = image_load_qt_1 (f, img, type, NULL, dh); |
| 2531 | DisposeHandle (dh); |
| 2532 | return success_p; |
| 2533 | } |
| 2534 | } |
| 2535 | |
| 2536 | |
| 2537 | #ifdef MAC_OSX |
| 2538 | /* Load a PNG/JPEG image using Quartz 2D decoding routines. |
| 2539 | CGImageCreateWithPNGDataProvider is provided after Mac OS X 10.2. |
| 2540 | So don't use this function directly but determine at runtime |
| 2541 | whether it exists. */ |
| 2542 | typedef CGImageRef (*CGImageCreateWithPNGDataProviderProcType) |
| 2543 | (CGDataProviderRef, const float [], bool, CGColorRenderingIntent); |
| 2544 | static CGImageCreateWithPNGDataProviderProcType MyCGImageCreateWithPNGDataProvider; |
| 2545 | |
| 2546 | |
| 2547 | static void |
| 2548 | init_image_func_pointer () |
| 2549 | { |
| 2550 | if (NSIsSymbolNameDefined ("_CGImageCreateWithPNGDataProvider")) |
| 2551 | { |
| 2552 | MyCGImageCreateWithPNGDataProvider |
| 2553 | = (CGImageCreateWithPNGDataProviderProcType) |
| 2554 | NSAddressOfSymbol (NSLookupAndBindSymbol |
| 2555 | ("_CGImageCreateWithPNGDataProvider")); |
| 2556 | } |
| 2557 | else |
| 2558 | MyCGImageCreateWithPNGDataProvider = NULL; |
| 2559 | } |
| 2560 | |
| 2561 | |
| 2562 | static int |
| 2563 | image_load_quartz2d (f, img, png_p) |
| 2564 | struct frame *f; |
| 2565 | struct image *img; |
| 2566 | int png_p; |
| 2567 | { |
| 2568 | Lisp_Object file, specified_file; |
| 2569 | Lisp_Object specified_data, specified_bg; |
| 2570 | struct gcpro gcpro1; |
| 2571 | CGDataProviderRef source; |
| 2572 | CGImageRef image; |
| 2573 | int width, height; |
| 2574 | XColor color; |
| 2575 | XImagePtr ximg = NULL; |
| 2576 | CGContextRef context; |
| 2577 | CGRect rectangle; |
| 2578 | |
| 2579 | /* Open the file. */ |
| 2580 | specified_file = image_spec_value (img->spec, QCfile, NULL); |
| 2581 | specified_data = image_spec_value (img->spec, QCdata, NULL); |
| 2582 | |
| 2583 | file = Qnil; |
| 2584 | GCPRO1 (file); |
| 2585 | |
| 2586 | if (NILP (specified_data)) |
| 2587 | { |
| 2588 | CFStringRef path; |
| 2589 | CFURLRef url; |
| 2590 | |
| 2591 | file = x_find_image_file (specified_file); |
| 2592 | if (!STRINGP (file)) |
| 2593 | { |
| 2594 | image_error ("Cannot find image file `%s'", specified_file, Qnil); |
| 2595 | UNGCPRO; |
| 2596 | return 0; |
| 2597 | } |
| 2598 | path = cfstring_create_with_string (file); |
| 2599 | url = CFURLCreateWithFileSystemPath (NULL, path, |
| 2600 | kCFURLPOSIXPathStyle, 0); |
| 2601 | CFRelease (path); |
| 2602 | source = CGDataProviderCreateWithURL (url); |
| 2603 | CFRelease (url); |
| 2604 | } |
| 2605 | else |
| 2606 | source = CGDataProviderCreateWithData (NULL, SDATA (specified_data), |
| 2607 | SBYTES (specified_data), NULL); |
| 2608 | |
| 2609 | if (png_p) |
| 2610 | image = (*MyCGImageCreateWithPNGDataProvider) (source, NULL, FALSE, |
| 2611 | kCGRenderingIntentDefault); |
| 2612 | else |
| 2613 | image = CGImageCreateWithJPEGDataProvider (source, NULL, FALSE, |
| 2614 | kCGRenderingIntentDefault); |
| 2615 | |
| 2616 | CGDataProviderRelease (source); |
| 2617 | if (image == NULL) |
| 2618 | { |
| 2619 | UNGCPRO; |
| 2620 | image_error ("Error reading image `%s'", img->spec, Qnil); |
| 2621 | return 0; |
| 2622 | } |
| 2623 | width = img->width = CGImageGetWidth (image); |
| 2624 | height = img->height = CGImageGetHeight (image); |
| 2625 | |
| 2626 | if (!check_image_size (f, width, height)) |
| 2627 | { |
| 2628 | CGImageRelease (image); |
| 2629 | UNGCPRO; |
| 2630 | image_error ("Invalid image size", Qnil, Qnil); |
| 2631 | return 0; |
| 2632 | } |
| 2633 | |
| 2634 | if (png_p) |
| 2635 | { |
| 2636 | specified_bg = image_spec_value (img->spec, QCbackground, NULL); |
| 2637 | if (!STRINGP (specified_bg) || |
| 2638 | !mac_defined_color (f, SDATA (specified_bg), &color, 0)) |
| 2639 | { |
| 2640 | color.pixel = FRAME_BACKGROUND_PIXEL (f); |
| 2641 | color.red = RED16_FROM_ULONG (color.pixel); |
| 2642 | color.green = GREEN16_FROM_ULONG (color.pixel); |
| 2643 | color.blue = BLUE16_FROM_ULONG (color.pixel); |
| 2644 | } |
| 2645 | } |
| 2646 | |
| 2647 | if (!x_create_x_image_and_pixmap (f, width, height, 0, &ximg, &img->pixmap)) |
| 2648 | { |
| 2649 | CGImageRelease (image); |
| 2650 | UNGCPRO; |
| 2651 | return 0; |
| 2652 | } |
| 2653 | rectangle = CGRectMake (0, 0, width, height); |
| 2654 | QDBeginCGContext (ximg, &context); |
| 2655 | if (png_p) |
| 2656 | { |
| 2657 | CGContextSetRGBFillColor (context, color.red / 65535.0, |
| 2658 | color.green / 65535.0, |
| 2659 | color.blue / 65535.0, 1.0); |
| 2660 | CGContextFillRect (context, rectangle); |
| 2661 | } |
| 2662 | CGContextDrawImage (context, rectangle, image); |
| 2663 | QDEndCGContext (ximg, &context); |
| 2664 | CGImageRelease (image); |
| 2665 | |
| 2666 | /* Maybe fill in the background field while we have ximg handy. */ |
| 2667 | if (NILP (image_spec_value (img->spec, QCbackground, NULL))) |
| 2668 | IMAGE_BACKGROUND (img, f, ximg); |
| 2669 | |
| 2670 | /* Put the image into the pixmap. */ |
| 2671 | x_put_x_image (f, ximg, img->pixmap, width, height); |
| 2672 | x_destroy_x_image (ximg); |
| 2673 | UNGCPRO; |
| 2674 | return 1; |
| 2675 | } |
| 2676 | #endif |
| 2677 | |
| 2678 | #endif /* MAC_OS */ |
| 2679 | |
| 2680 | \f |
| 2681 | /*********************************************************************** |
| 2682 | XBM images |
| 2683 | ***********************************************************************/ |
| 2684 | |
| 2685 | static int xbm_scan P_ ((unsigned char **, unsigned char *, char *, int *)); |
| 2686 | static int xbm_load P_ ((struct frame *f, struct image *img)); |
| 2687 | static int xbm_load_image P_ ((struct frame *f, struct image *img, |
| 2688 | unsigned char *, unsigned char *)); |
| 2689 | static int xbm_image_p P_ ((Lisp_Object object)); |
| 2690 | static int xbm_read_bitmap_data P_ ((struct frame *f, |
| 2691 | unsigned char *, unsigned char *, |
| 2692 | int *, int *, unsigned char **)); |
| 2693 | static int xbm_file_p P_ ((Lisp_Object)); |
| 2694 | |
| 2695 | |
| 2696 | /* Indices of image specification fields in xbm_format, below. */ |
| 2697 | |
| 2698 | enum xbm_keyword_index |
| 2699 | { |
| 2700 | XBM_TYPE, |
| 2701 | XBM_FILE, |
| 2702 | XBM_WIDTH, |
| 2703 | XBM_HEIGHT, |
| 2704 | XBM_DATA, |
| 2705 | XBM_FOREGROUND, |
| 2706 | XBM_BACKGROUND, |
| 2707 | XBM_ASCENT, |
| 2708 | XBM_MARGIN, |
| 2709 | XBM_RELIEF, |
| 2710 | XBM_ALGORITHM, |
| 2711 | XBM_HEURISTIC_MASK, |
| 2712 | XBM_MASK, |
| 2713 | XBM_LAST |
| 2714 | }; |
| 2715 | |
| 2716 | /* Vector of image_keyword structures describing the format |
| 2717 | of valid XBM image specifications. */ |
| 2718 | |
| 2719 | static struct image_keyword xbm_format[XBM_LAST] = |
| 2720 | { |
| 2721 | {":type", IMAGE_SYMBOL_VALUE, 1}, |
| 2722 | {":file", IMAGE_STRING_VALUE, 0}, |
| 2723 | {":width", IMAGE_POSITIVE_INTEGER_VALUE, 0}, |
| 2724 | {":height", IMAGE_POSITIVE_INTEGER_VALUE, 0}, |
| 2725 | {":data", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, |
| 2726 | {":foreground", IMAGE_STRING_OR_NIL_VALUE, 0}, |
| 2727 | {":background", IMAGE_STRING_OR_NIL_VALUE, 0}, |
| 2728 | {":ascent", IMAGE_ASCENT_VALUE, 0}, |
| 2729 | {":margin", IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR, 0}, |
| 2730 | {":relief", IMAGE_INTEGER_VALUE, 0}, |
| 2731 | {":conversion", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, |
| 2732 | {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, |
| 2733 | {":mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0} |
| 2734 | }; |
| 2735 | |
| 2736 | /* Structure describing the image type XBM. */ |
| 2737 | |
| 2738 | static struct image_type xbm_type = |
| 2739 | { |
| 2740 | &Qxbm, |
| 2741 | xbm_image_p, |
| 2742 | xbm_load, |
| 2743 | x_clear_image, |
| 2744 | NULL |
| 2745 | }; |
| 2746 | |
| 2747 | /* Tokens returned from xbm_scan. */ |
| 2748 | |
| 2749 | enum xbm_token |
| 2750 | { |
| 2751 | XBM_TK_IDENT = 256, |
| 2752 | XBM_TK_NUMBER |
| 2753 | }; |
| 2754 | |
| 2755 | |
| 2756 | /* Return non-zero if OBJECT is a valid XBM-type image specification. |
| 2757 | A valid specification is a list starting with the symbol `image' |
| 2758 | The rest of the list is a property list which must contain an |
| 2759 | entry `:type xbm.. |
| 2760 | |
| 2761 | If the specification specifies a file to load, it must contain |
| 2762 | an entry `:file FILENAME' where FILENAME is a string. |
| 2763 | |
| 2764 | If the specification is for a bitmap loaded from memory it must |
| 2765 | contain `:width WIDTH', `:height HEIGHT', and `:data DATA', where |
| 2766 | WIDTH and HEIGHT are integers > 0. DATA may be: |
| 2767 | |
| 2768 | 1. a string large enough to hold the bitmap data, i.e. it must |
| 2769 | have a size >= (WIDTH + 7) / 8 * HEIGHT |
| 2770 | |
| 2771 | 2. a bool-vector of size >= WIDTH * HEIGHT |
| 2772 | |
| 2773 | 3. a vector of strings or bool-vectors, one for each line of the |
| 2774 | bitmap. |
| 2775 | |
| 2776 | 4. A string containing an in-memory XBM file. WIDTH and HEIGHT |
| 2777 | may not be specified in this case because they are defined in the |
| 2778 | XBM file. |
| 2779 | |
| 2780 | Both the file and data forms may contain the additional entries |
| 2781 | `:background COLOR' and `:foreground COLOR'. If not present, |
| 2782 | foreground and background of the frame on which the image is |
| 2783 | displayed is used. */ |
| 2784 | |
| 2785 | static int |
| 2786 | xbm_image_p (object) |
| 2787 | Lisp_Object object; |
| 2788 | { |
| 2789 | struct image_keyword kw[XBM_LAST]; |
| 2790 | |
| 2791 | bcopy (xbm_format, kw, sizeof kw); |
| 2792 | if (!parse_image_spec (object, kw, XBM_LAST, Qxbm)) |
| 2793 | return 0; |
| 2794 | |
| 2795 | xassert (EQ (kw[XBM_TYPE].value, Qxbm)); |
| 2796 | |
| 2797 | if (kw[XBM_FILE].count) |
| 2798 | { |
| 2799 | if (kw[XBM_WIDTH].count || kw[XBM_HEIGHT].count || kw[XBM_DATA].count) |
| 2800 | return 0; |
| 2801 | } |
| 2802 | else if (kw[XBM_DATA].count && xbm_file_p (kw[XBM_DATA].value)) |
| 2803 | { |
| 2804 | /* In-memory XBM file. */ |
| 2805 | if (kw[XBM_WIDTH].count || kw[XBM_HEIGHT].count || kw[XBM_FILE].count) |
| 2806 | return 0; |
| 2807 | } |
| 2808 | else |
| 2809 | { |
| 2810 | Lisp_Object data; |
| 2811 | int width, height; |
| 2812 | |
| 2813 | /* Entries for `:width', `:height' and `:data' must be present. */ |
| 2814 | if (!kw[XBM_WIDTH].count |
| 2815 | || !kw[XBM_HEIGHT].count |
| 2816 | || !kw[XBM_DATA].count) |
| 2817 | return 0; |
| 2818 | |
| 2819 | data = kw[XBM_DATA].value; |
| 2820 | width = XFASTINT (kw[XBM_WIDTH].value); |
| 2821 | height = XFASTINT (kw[XBM_HEIGHT].value); |
| 2822 | |
| 2823 | /* Check type of data, and width and height against contents of |
| 2824 | data. */ |
| 2825 | if (VECTORP (data)) |
| 2826 | { |
| 2827 | int i; |
| 2828 | |
| 2829 | /* Number of elements of the vector must be >= height. */ |
| 2830 | if (XVECTOR (data)->size < height) |
| 2831 | return 0; |
| 2832 | |
| 2833 | /* Each string or bool-vector in data must be large enough |
| 2834 | for one line of the image. */ |
| 2835 | for (i = 0; i < height; ++i) |
| 2836 | { |
| 2837 | Lisp_Object elt = XVECTOR (data)->contents[i]; |
| 2838 | |
| 2839 | if (STRINGP (elt)) |
| 2840 | { |
| 2841 | if (SCHARS (elt) |
| 2842 | < (width + BITS_PER_CHAR - 1) / BITS_PER_CHAR) |
| 2843 | return 0; |
| 2844 | } |
| 2845 | else if (BOOL_VECTOR_P (elt)) |
| 2846 | { |
| 2847 | if (XBOOL_VECTOR (elt)->size < width) |
| 2848 | return 0; |
| 2849 | } |
| 2850 | else |
| 2851 | return 0; |
| 2852 | } |
| 2853 | } |
| 2854 | else if (STRINGP (data)) |
| 2855 | { |
| 2856 | if (SCHARS (data) |
| 2857 | < (width + BITS_PER_CHAR - 1) / BITS_PER_CHAR * height) |
| 2858 | return 0; |
| 2859 | } |
| 2860 | else if (BOOL_VECTOR_P (data)) |
| 2861 | { |
| 2862 | if (XBOOL_VECTOR (data)->size < width * height) |
| 2863 | return 0; |
| 2864 | } |
| 2865 | else |
| 2866 | return 0; |
| 2867 | } |
| 2868 | |
| 2869 | return 1; |
| 2870 | } |
| 2871 | |
| 2872 | |
| 2873 | /* Scan a bitmap file. FP is the stream to read from. Value is |
| 2874 | either an enumerator from enum xbm_token, or a character for a |
| 2875 | single-character token, or 0 at end of file. If scanning an |
| 2876 | identifier, store the lexeme of the identifier in SVAL. If |
| 2877 | scanning a number, store its value in *IVAL. */ |
| 2878 | |
| 2879 | static int |
| 2880 | xbm_scan (s, end, sval, ival) |
| 2881 | unsigned char **s, *end; |
| 2882 | char *sval; |
| 2883 | int *ival; |
| 2884 | { |
| 2885 | unsigned int c; |
| 2886 | |
| 2887 | loop: |
| 2888 | |
| 2889 | /* Skip white space. */ |
| 2890 | while (*s < end && (c = *(*s)++, isspace (c))) |
| 2891 | ; |
| 2892 | |
| 2893 | if (*s >= end) |
| 2894 | c = 0; |
| 2895 | else if (isdigit (c)) |
| 2896 | { |
| 2897 | int value = 0, digit; |
| 2898 | |
| 2899 | if (c == '0' && *s < end) |
| 2900 | { |
| 2901 | c = *(*s)++; |
| 2902 | if (c == 'x' || c == 'X') |
| 2903 | { |
| 2904 | while (*s < end) |
| 2905 | { |
| 2906 | c = *(*s)++; |
| 2907 | if (isdigit (c)) |
| 2908 | digit = c - '0'; |
| 2909 | else if (c >= 'a' && c <= 'f') |
| 2910 | digit = c - 'a' + 10; |
| 2911 | else if (c >= 'A' && c <= 'F') |
| 2912 | digit = c - 'A' + 10; |
| 2913 | else |
| 2914 | break; |
| 2915 | value = 16 * value + digit; |
| 2916 | } |
| 2917 | } |
| 2918 | else if (isdigit (c)) |
| 2919 | { |
| 2920 | value = c - '0'; |
| 2921 | while (*s < end |
| 2922 | && (c = *(*s)++, isdigit (c))) |
| 2923 | value = 8 * value + c - '0'; |
| 2924 | } |
| 2925 | } |
| 2926 | else |
| 2927 | { |
| 2928 | value = c - '0'; |
| 2929 | while (*s < end |
| 2930 | && (c = *(*s)++, isdigit (c))) |
| 2931 | value = 10 * value + c - '0'; |
| 2932 | } |
| 2933 | |
| 2934 | if (*s < end) |
| 2935 | *s = *s - 1; |
| 2936 | *ival = value; |
| 2937 | c = XBM_TK_NUMBER; |
| 2938 | } |
| 2939 | else if (isalpha (c) || c == '_') |
| 2940 | { |
| 2941 | *sval++ = c; |
| 2942 | while (*s < end |
| 2943 | && (c = *(*s)++, (isalnum (c) || c == '_'))) |
| 2944 | *sval++ = c; |
| 2945 | *sval = 0; |
| 2946 | if (*s < end) |
| 2947 | *s = *s - 1; |
| 2948 | c = XBM_TK_IDENT; |
| 2949 | } |
| 2950 | else if (c == '/' && **s == '*') |
| 2951 | { |
| 2952 | /* C-style comment. */ |
| 2953 | ++*s; |
| 2954 | while (**s && (**s != '*' || *(*s + 1) != '/')) |
| 2955 | ++*s; |
| 2956 | if (**s) |
| 2957 | { |
| 2958 | *s += 2; |
| 2959 | goto loop; |
| 2960 | } |
| 2961 | } |
| 2962 | |
| 2963 | return c; |
| 2964 | } |
| 2965 | |
| 2966 | #ifdef HAVE_NTGUI |
| 2967 | |
| 2968 | /* Create a Windows bitmap from X bitmap data. */ |
| 2969 | static HBITMAP |
| 2970 | w32_create_pixmap_from_bitmap_data (int width, int height, char *data) |
| 2971 | { |
| 2972 | static unsigned char swap_nibble[16] |
| 2973 | = { 0x0, 0x8, 0x4, 0xc, /* 0000 1000 0100 1100 */ |
| 2974 | 0x2, 0xa, 0x6, 0xe, /* 0010 1010 0110 1110 */ |
| 2975 | 0x1, 0x9, 0x5, 0xd, /* 0001 1001 0101 1101 */ |
| 2976 | 0x3, 0xb, 0x7, 0xf }; /* 0011 1011 0111 1111 */ |
| 2977 | int i, j, w1, w2; |
| 2978 | unsigned char *bits, *p; |
| 2979 | HBITMAP bmp; |
| 2980 | |
| 2981 | w1 = (width + 7) / 8; /* nb of 8bits elt in X bitmap */ |
| 2982 | w2 = ((width + 15) / 16) * 2; /* nb of 16bits elt in W32 bitmap */ |
| 2983 | bits = (unsigned char *) alloca (height * w2); |
| 2984 | bzero (bits, height * w2); |
| 2985 | for (i = 0; i < height; i++) |
| 2986 | { |
| 2987 | p = bits + i*w2; |
| 2988 | for (j = 0; j < w1; j++) |
| 2989 | { |
| 2990 | /* Bitswap XBM bytes to match how Windows does things. */ |
| 2991 | unsigned char c = *data++; |
| 2992 | *p++ = (unsigned char)((swap_nibble[c & 0xf] << 4) |
| 2993 | | (swap_nibble[(c>>4) & 0xf])); |
| 2994 | } |
| 2995 | } |
| 2996 | bmp = CreateBitmap (width, height, 1, 1, (char *) bits); |
| 2997 | |
| 2998 | return bmp; |
| 2999 | } |
| 3000 | |
| 3001 | static void convert_mono_to_color_image (f, img, foreground, background) |
| 3002 | struct frame *f; |
| 3003 | struct image *img; |
| 3004 | COLORREF foreground, background; |
| 3005 | { |
| 3006 | HDC hdc, old_img_dc, new_img_dc; |
| 3007 | HGDIOBJ old_prev, new_prev; |
| 3008 | HBITMAP new_pixmap; |
| 3009 | |
| 3010 | hdc = get_frame_dc (f); |
| 3011 | old_img_dc = CreateCompatibleDC (hdc); |
| 3012 | new_img_dc = CreateCompatibleDC (hdc); |
| 3013 | new_pixmap = CreateCompatibleBitmap (hdc, img->width, img->height); |
| 3014 | release_frame_dc (f, hdc); |
| 3015 | old_prev = SelectObject (old_img_dc, img->pixmap); |
| 3016 | new_prev = SelectObject (new_img_dc, new_pixmap); |
| 3017 | SetTextColor (new_img_dc, foreground); |
| 3018 | SetBkColor (new_img_dc, background); |
| 3019 | |
| 3020 | BitBlt (new_img_dc, 0, 0, img->width, img->height, old_img_dc, |
| 3021 | 0, 0, SRCCOPY); |
| 3022 | |
| 3023 | SelectObject (old_img_dc, old_prev); |
| 3024 | SelectObject (new_img_dc, new_prev); |
| 3025 | DeleteDC (old_img_dc); |
| 3026 | DeleteDC (new_img_dc); |
| 3027 | DeleteObject (img->pixmap); |
| 3028 | if (new_pixmap == 0) |
| 3029 | fprintf (stderr, "Failed to convert image to color.\n"); |
| 3030 | else |
| 3031 | img->pixmap = new_pixmap; |
| 3032 | } |
| 3033 | |
| 3034 | #define XBM_BIT_SHUFFLE(b) (~(b)) |
| 3035 | |
| 3036 | #else |
| 3037 | |
| 3038 | #define XBM_BIT_SHUFFLE(b) (b) |
| 3039 | |
| 3040 | #endif /* HAVE_NTGUI */ |
| 3041 | |
| 3042 | |
| 3043 | static void |
| 3044 | Create_Pixmap_From_Bitmap_Data(f, img, data, fg, bg, non_default_colors) |
| 3045 | struct frame *f; |
| 3046 | struct image *img; |
| 3047 | char *data; |
| 3048 | RGB_PIXEL_COLOR fg, bg; |
| 3049 | int non_default_colors; |
| 3050 | { |
| 3051 | #ifdef HAVE_NTGUI |
| 3052 | img->pixmap |
| 3053 | = w32_create_pixmap_from_bitmap_data (img->width, img->height, data); |
| 3054 | |
| 3055 | /* If colors were specified, transfer the bitmap to a color one. */ |
| 3056 | if (non_default_colors) |
| 3057 | convert_mono_to_color_image (f, img, fg, bg); |
| 3058 | #else |
| 3059 | img->pixmap |
| 3060 | = XCreatePixmapFromBitmapData (FRAME_X_DISPLAY (f), |
| 3061 | FRAME_X_WINDOW (f), |
| 3062 | data, |
| 3063 | img->width, img->height, |
| 3064 | fg, bg, |
| 3065 | DefaultDepthOfScreen (FRAME_X_SCREEN (f))); |
| 3066 | #endif /* HAVE_NTGUI */ |
| 3067 | } |
| 3068 | |
| 3069 | |
| 3070 | |
| 3071 | /* Replacement for XReadBitmapFileData which isn't available under old |
| 3072 | X versions. CONTENTS is a pointer to a buffer to parse; END is the |
| 3073 | buffer's end. Set *WIDTH and *HEIGHT to the width and height of |
| 3074 | the image. Return in *DATA the bitmap data allocated with xmalloc. |
| 3075 | Value is non-zero if successful. DATA null means just test if |
| 3076 | CONTENTS looks like an in-memory XBM file. */ |
| 3077 | |
| 3078 | static int |
| 3079 | xbm_read_bitmap_data (f, contents, end, width, height, data) |
| 3080 | struct frame *f; |
| 3081 | unsigned char *contents, *end; |
| 3082 | int *width, *height; |
| 3083 | unsigned char **data; |
| 3084 | { |
| 3085 | unsigned char *s = contents; |
| 3086 | char buffer[BUFSIZ]; |
| 3087 | int padding_p = 0; |
| 3088 | int v10 = 0; |
| 3089 | int bytes_per_line, i, nbytes; |
| 3090 | unsigned char *p; |
| 3091 | int value; |
| 3092 | int LA1; |
| 3093 | |
| 3094 | #define match() \ |
| 3095 | LA1 = xbm_scan (&s, end, buffer, &value) |
| 3096 | |
| 3097 | #define expect(TOKEN) \ |
| 3098 | if (LA1 != (TOKEN)) \ |
| 3099 | goto failure; \ |
| 3100 | else \ |
| 3101 | match () |
| 3102 | |
| 3103 | #define expect_ident(IDENT) \ |
| 3104 | if (LA1 == XBM_TK_IDENT && strcmp (buffer, (IDENT)) == 0) \ |
| 3105 | match (); \ |
| 3106 | else \ |
| 3107 | goto failure |
| 3108 | |
| 3109 | *width = *height = -1; |
| 3110 | if (data) |
| 3111 | *data = NULL; |
| 3112 | LA1 = xbm_scan (&s, end, buffer, &value); |
| 3113 | |
| 3114 | /* Parse defines for width, height and hot-spots. */ |
| 3115 | while (LA1 == '#') |
| 3116 | { |
| 3117 | match (); |
| 3118 | expect_ident ("define"); |
| 3119 | expect (XBM_TK_IDENT); |
| 3120 | |
| 3121 | if (LA1 == XBM_TK_NUMBER); |
| 3122 | { |
| 3123 | char *p = strrchr (buffer, '_'); |
| 3124 | p = p ? p + 1 : buffer; |
| 3125 | if (strcmp (p, "width") == 0) |
| 3126 | *width = value; |
| 3127 | else if (strcmp (p, "height") == 0) |
| 3128 | *height = value; |
| 3129 | } |
| 3130 | expect (XBM_TK_NUMBER); |
| 3131 | } |
| 3132 | |
| 3133 | if (!check_image_size (f, *width, *height)) |
| 3134 | goto failure; |
| 3135 | else if (data == NULL) |
| 3136 | goto success; |
| 3137 | |
| 3138 | /* Parse bits. Must start with `static'. */ |
| 3139 | expect_ident ("static"); |
| 3140 | if (LA1 == XBM_TK_IDENT) |
| 3141 | { |
| 3142 | if (strcmp (buffer, "unsigned") == 0) |
| 3143 | { |
| 3144 | match (); |
| 3145 | expect_ident ("char"); |
| 3146 | } |
| 3147 | else if (strcmp (buffer, "short") == 0) |
| 3148 | { |
| 3149 | match (); |
| 3150 | v10 = 1; |
| 3151 | if (*width % 16 && *width % 16 < 9) |
| 3152 | padding_p = 1; |
| 3153 | } |
| 3154 | else if (strcmp (buffer, "char") == 0) |
| 3155 | match (); |
| 3156 | else |
| 3157 | goto failure; |
| 3158 | } |
| 3159 | else |
| 3160 | goto failure; |
| 3161 | |
| 3162 | expect (XBM_TK_IDENT); |
| 3163 | expect ('['); |
| 3164 | expect (']'); |
| 3165 | expect ('='); |
| 3166 | expect ('{'); |
| 3167 | |
| 3168 | bytes_per_line = (*width + 7) / 8 + padding_p; |
| 3169 | nbytes = bytes_per_line * *height; |
| 3170 | p = *data = (unsigned char *) xmalloc (nbytes); |
| 3171 | |
| 3172 | if (v10) |
| 3173 | { |
| 3174 | for (i = 0; i < nbytes; i += 2) |
| 3175 | { |
| 3176 | int val = value; |
| 3177 | expect (XBM_TK_NUMBER); |
| 3178 | |
| 3179 | *p++ = XBM_BIT_SHUFFLE (val); |
| 3180 | if (!padding_p || ((i + 2) % bytes_per_line)) |
| 3181 | *p++ = XBM_BIT_SHUFFLE (value >> 8); |
| 3182 | |
| 3183 | if (LA1 == ',' || LA1 == '}') |
| 3184 | match (); |
| 3185 | else |
| 3186 | goto failure; |
| 3187 | } |
| 3188 | } |
| 3189 | else |
| 3190 | { |
| 3191 | for (i = 0; i < nbytes; ++i) |
| 3192 | { |
| 3193 | int val = value; |
| 3194 | expect (XBM_TK_NUMBER); |
| 3195 | |
| 3196 | *p++ = XBM_BIT_SHUFFLE (val); |
| 3197 | |
| 3198 | if (LA1 == ',' || LA1 == '}') |
| 3199 | match (); |
| 3200 | else |
| 3201 | goto failure; |
| 3202 | } |
| 3203 | } |
| 3204 | |
| 3205 | success: |
| 3206 | return 1; |
| 3207 | |
| 3208 | failure: |
| 3209 | |
| 3210 | if (data && *data) |
| 3211 | { |
| 3212 | xfree (*data); |
| 3213 | *data = NULL; |
| 3214 | } |
| 3215 | return 0; |
| 3216 | |
| 3217 | #undef match |
| 3218 | #undef expect |
| 3219 | #undef expect_ident |
| 3220 | } |
| 3221 | |
| 3222 | |
| 3223 | /* Load XBM image IMG which will be displayed on frame F from buffer |
| 3224 | CONTENTS. END is the end of the buffer. Value is non-zero if |
| 3225 | successful. */ |
| 3226 | |
| 3227 | static int |
| 3228 | xbm_load_image (f, img, contents, end) |
| 3229 | struct frame *f; |
| 3230 | struct image *img; |
| 3231 | unsigned char *contents, *end; |
| 3232 | { |
| 3233 | int rc; |
| 3234 | unsigned char *data; |
| 3235 | int success_p = 0; |
| 3236 | |
| 3237 | rc = xbm_read_bitmap_data (f, contents, end, &img->width, &img->height, &data); |
| 3238 | if (rc) |
| 3239 | { |
| 3240 | unsigned long foreground = FRAME_FOREGROUND_PIXEL (f); |
| 3241 | unsigned long background = FRAME_BACKGROUND_PIXEL (f); |
| 3242 | int non_default_colors = 0; |
| 3243 | Lisp_Object value; |
| 3244 | |
| 3245 | xassert (img->width > 0 && img->height > 0); |
| 3246 | |
| 3247 | /* Get foreground and background colors, maybe allocate colors. */ |
| 3248 | value = image_spec_value (img->spec, QCforeground, NULL); |
| 3249 | if (!NILP (value)) |
| 3250 | { |
| 3251 | foreground = x_alloc_image_color (f, img, value, foreground); |
| 3252 | non_default_colors = 1; |
| 3253 | } |
| 3254 | value = image_spec_value (img->spec, QCbackground, NULL); |
| 3255 | if (!NILP (value)) |
| 3256 | { |
| 3257 | background = x_alloc_image_color (f, img, value, background); |
| 3258 | img->background = background; |
| 3259 | img->background_valid = 1; |
| 3260 | non_default_colors = 1; |
| 3261 | } |
| 3262 | |
| 3263 | Create_Pixmap_From_Bitmap_Data (f, img, data, |
| 3264 | foreground, background, |
| 3265 | non_default_colors); |
| 3266 | xfree (data); |
| 3267 | |
| 3268 | if (img->pixmap == NO_PIXMAP) |
| 3269 | { |
| 3270 | x_clear_image (f, img); |
| 3271 | image_error ("Unable to create X pixmap for `%s'", img->spec, Qnil); |
| 3272 | } |
| 3273 | else |
| 3274 | success_p = 1; |
| 3275 | } |
| 3276 | else |
| 3277 | image_error ("Error loading XBM image `%s'", img->spec, Qnil); |
| 3278 | |
| 3279 | return success_p; |
| 3280 | } |
| 3281 | |
| 3282 | |
| 3283 | /* Value is non-zero if DATA looks like an in-memory XBM file. */ |
| 3284 | |
| 3285 | static int |
| 3286 | xbm_file_p (data) |
| 3287 | Lisp_Object data; |
| 3288 | { |
| 3289 | int w, h; |
| 3290 | return (STRINGP (data) |
| 3291 | && xbm_read_bitmap_data (NULL, SDATA (data), |
| 3292 | (SDATA (data) |
| 3293 | + SBYTES (data)), |
| 3294 | &w, &h, NULL)); |
| 3295 | } |
| 3296 | |
| 3297 | |
| 3298 | /* Fill image IMG which is used on frame F with pixmap data. Value is |
| 3299 | non-zero if successful. */ |
| 3300 | |
| 3301 | static int |
| 3302 | xbm_load (f, img) |
| 3303 | struct frame *f; |
| 3304 | struct image *img; |
| 3305 | { |
| 3306 | int success_p = 0; |
| 3307 | Lisp_Object file_name; |
| 3308 | |
| 3309 | xassert (xbm_image_p (img->spec)); |
| 3310 | |
| 3311 | /* If IMG->spec specifies a file name, create a non-file spec from it. */ |
| 3312 | file_name = image_spec_value (img->spec, QCfile, NULL); |
| 3313 | if (STRINGP (file_name)) |
| 3314 | { |
| 3315 | Lisp_Object file; |
| 3316 | unsigned char *contents; |
| 3317 | int size; |
| 3318 | struct gcpro gcpro1; |
| 3319 | |
| 3320 | file = x_find_image_file (file_name); |
| 3321 | GCPRO1 (file); |
| 3322 | if (!STRINGP (file)) |
| 3323 | { |
| 3324 | image_error ("Cannot find image file `%s'", file_name, Qnil); |
| 3325 | UNGCPRO; |
| 3326 | return 0; |
| 3327 | } |
| 3328 | |
| 3329 | contents = slurp_file (SDATA (file), &size); |
| 3330 | if (contents == NULL) |
| 3331 | { |
| 3332 | image_error ("Error loading XBM image `%s'", img->spec, Qnil); |
| 3333 | UNGCPRO; |
| 3334 | return 0; |
| 3335 | } |
| 3336 | |
| 3337 | success_p = xbm_load_image (f, img, contents, contents + size); |
| 3338 | UNGCPRO; |
| 3339 | } |
| 3340 | else |
| 3341 | { |
| 3342 | struct image_keyword fmt[XBM_LAST]; |
| 3343 | Lisp_Object data; |
| 3344 | unsigned long foreground = FRAME_FOREGROUND_PIXEL (f); |
| 3345 | unsigned long background = FRAME_BACKGROUND_PIXEL (f); |
| 3346 | int non_default_colors = 0; |
| 3347 | char *bits; |
| 3348 | int parsed_p; |
| 3349 | int in_memory_file_p = 0; |
| 3350 | |
| 3351 | /* See if data looks like an in-memory XBM file. */ |
| 3352 | data = image_spec_value (img->spec, QCdata, NULL); |
| 3353 | in_memory_file_p = xbm_file_p (data); |
| 3354 | |
| 3355 | /* Parse the image specification. */ |
| 3356 | bcopy (xbm_format, fmt, sizeof fmt); |
| 3357 | parsed_p = parse_image_spec (img->spec, fmt, XBM_LAST, Qxbm); |
| 3358 | xassert (parsed_p); |
| 3359 | |
| 3360 | /* Get specified width, and height. */ |
| 3361 | if (!in_memory_file_p) |
| 3362 | { |
| 3363 | img->width = XFASTINT (fmt[XBM_WIDTH].value); |
| 3364 | img->height = XFASTINT (fmt[XBM_HEIGHT].value); |
| 3365 | xassert (img->width > 0 && img->height > 0); |
| 3366 | } |
| 3367 | |
| 3368 | /* Get foreground and background colors, maybe allocate colors. */ |
| 3369 | if (fmt[XBM_FOREGROUND].count |
| 3370 | && STRINGP (fmt[XBM_FOREGROUND].value)) |
| 3371 | { |
| 3372 | foreground = x_alloc_image_color (f, img, fmt[XBM_FOREGROUND].value, |
| 3373 | foreground); |
| 3374 | non_default_colors = 1; |
| 3375 | } |
| 3376 | |
| 3377 | if (fmt[XBM_BACKGROUND].count |
| 3378 | && STRINGP (fmt[XBM_BACKGROUND].value)) |
| 3379 | { |
| 3380 | background = x_alloc_image_color (f, img, fmt[XBM_BACKGROUND].value, |
| 3381 | background); |
| 3382 | non_default_colors = 1; |
| 3383 | } |
| 3384 | |
| 3385 | if (in_memory_file_p) |
| 3386 | success_p = xbm_load_image (f, img, SDATA (data), |
| 3387 | (SDATA (data) |
| 3388 | + SBYTES (data))); |
| 3389 | else |
| 3390 | { |
| 3391 | if (VECTORP (data)) |
| 3392 | { |
| 3393 | int i; |
| 3394 | char *p; |
| 3395 | int nbytes = (img->width + BITS_PER_CHAR - 1) / BITS_PER_CHAR; |
| 3396 | |
| 3397 | p = bits = (char *) alloca (nbytes * img->height); |
| 3398 | for (i = 0; i < img->height; ++i, p += nbytes) |
| 3399 | { |
| 3400 | Lisp_Object line = XVECTOR (data)->contents[i]; |
| 3401 | if (STRINGP (line)) |
| 3402 | bcopy (SDATA (line), p, nbytes); |
| 3403 | else |
| 3404 | bcopy (XBOOL_VECTOR (line)->data, p, nbytes); |
| 3405 | } |
| 3406 | } |
| 3407 | else if (STRINGP (data)) |
| 3408 | bits = SDATA (data); |
| 3409 | else |
| 3410 | bits = XBOOL_VECTOR (data)->data; |
| 3411 | |
| 3412 | /* Create the pixmap. */ |
| 3413 | |
| 3414 | Create_Pixmap_From_Bitmap_Data (f, img, bits, |
| 3415 | foreground, background, |
| 3416 | non_default_colors); |
| 3417 | if (img->pixmap) |
| 3418 | success_p = 1; |
| 3419 | else |
| 3420 | { |
| 3421 | image_error ("Unable to create pixmap for XBM image `%s'", |
| 3422 | img->spec, Qnil); |
| 3423 | x_clear_image (f, img); |
| 3424 | } |
| 3425 | } |
| 3426 | } |
| 3427 | |
| 3428 | return success_p; |
| 3429 | } |
| 3430 | |
| 3431 | |
| 3432 | \f |
| 3433 | /*********************************************************************** |
| 3434 | XPM images |
| 3435 | ***********************************************************************/ |
| 3436 | |
| 3437 | #if defined (HAVE_XPM) || defined (MAC_OS) |
| 3438 | |
| 3439 | static int xpm_image_p P_ ((Lisp_Object object)); |
| 3440 | static int xpm_load P_ ((struct frame *f, struct image *img)); |
| 3441 | static int xpm_valid_color_symbols_p P_ ((Lisp_Object)); |
| 3442 | |
| 3443 | #endif /* HAVE_XPM || MAC_OS */ |
| 3444 | |
| 3445 | #ifdef HAVE_XPM |
| 3446 | #ifdef HAVE_NTGUI |
| 3447 | /* Indicate to xpm.h that we don't have Xlib. */ |
| 3448 | #define FOR_MSW |
| 3449 | /* simx.h in xpm defines XColor and XImage differently than Emacs. */ |
| 3450 | /* It also defines Display the same way as Emacs, but gcc 3.3 still barfs. */ |
| 3451 | #define XColor xpm_XColor |
| 3452 | #define XImage xpm_XImage |
| 3453 | #define Display xpm_Display |
| 3454 | #define PIXEL_ALREADY_TYPEDEFED |
| 3455 | #include "X11/xpm.h" |
| 3456 | #undef FOR_MSW |
| 3457 | #undef XColor |
| 3458 | #undef XImage |
| 3459 | #undef Display |
| 3460 | #undef PIXEL_ALREADY_TYPEDEFED |
| 3461 | #else |
| 3462 | #include "X11/xpm.h" |
| 3463 | #endif /* HAVE_NTGUI */ |
| 3464 | #endif /* HAVE_XPM */ |
| 3465 | |
| 3466 | #if defined (HAVE_XPM) || defined (MAC_OS) |
| 3467 | /* The symbol `xpm' identifying XPM-format images. */ |
| 3468 | |
| 3469 | Lisp_Object Qxpm; |
| 3470 | |
| 3471 | /* Indices of image specification fields in xpm_format, below. */ |
| 3472 | |
| 3473 | enum xpm_keyword_index |
| 3474 | { |
| 3475 | XPM_TYPE, |
| 3476 | XPM_FILE, |
| 3477 | XPM_DATA, |
| 3478 | XPM_ASCENT, |
| 3479 | XPM_MARGIN, |
| 3480 | XPM_RELIEF, |
| 3481 | XPM_ALGORITHM, |
| 3482 | XPM_HEURISTIC_MASK, |
| 3483 | XPM_MASK, |
| 3484 | XPM_COLOR_SYMBOLS, |
| 3485 | XPM_BACKGROUND, |
| 3486 | XPM_LAST |
| 3487 | }; |
| 3488 | |
| 3489 | /* Vector of image_keyword structures describing the format |
| 3490 | of valid XPM image specifications. */ |
| 3491 | |
| 3492 | static struct image_keyword xpm_format[XPM_LAST] = |
| 3493 | { |
| 3494 | {":type", IMAGE_SYMBOL_VALUE, 1}, |
| 3495 | {":file", IMAGE_STRING_VALUE, 0}, |
| 3496 | {":data", IMAGE_STRING_VALUE, 0}, |
| 3497 | {":ascent", IMAGE_ASCENT_VALUE, 0}, |
| 3498 | {":margin", IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR, 0}, |
| 3499 | {":relief", IMAGE_INTEGER_VALUE, 0}, |
| 3500 | {":conversion", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, |
| 3501 | {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, |
| 3502 | {":mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, |
| 3503 | {":color-symbols", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, |
| 3504 | {":background", IMAGE_STRING_OR_NIL_VALUE, 0} |
| 3505 | }; |
| 3506 | |
| 3507 | /* Structure describing the image type XPM. */ |
| 3508 | |
| 3509 | static struct image_type xpm_type = |
| 3510 | { |
| 3511 | &Qxpm, |
| 3512 | xpm_image_p, |
| 3513 | xpm_load, |
| 3514 | x_clear_image, |
| 3515 | NULL |
| 3516 | }; |
| 3517 | |
| 3518 | #ifdef HAVE_X_WINDOWS |
| 3519 | |
| 3520 | /* Define ALLOC_XPM_COLORS if we can use Emacs' own color allocation |
| 3521 | functions for allocating image colors. Our own functions handle |
| 3522 | color allocation failures more gracefully than the ones on the XPM |
| 3523 | lib. */ |
| 3524 | |
| 3525 | #if defined XpmAllocColor && defined XpmFreeColors && defined XpmColorClosure |
| 3526 | #define ALLOC_XPM_COLORS |
| 3527 | #endif |
| 3528 | #endif /* HAVE_X_WINDOWS */ |
| 3529 | |
| 3530 | #ifdef ALLOC_XPM_COLORS |
| 3531 | |
| 3532 | static void xpm_init_color_cache P_ ((struct frame *, XpmAttributes *)); |
| 3533 | static void xpm_free_color_cache P_ ((void)); |
| 3534 | static int xpm_lookup_color P_ ((struct frame *, char *, XColor *)); |
| 3535 | static int xpm_color_bucket P_ ((char *)); |
| 3536 | static struct xpm_cached_color *xpm_cache_color P_ ((struct frame *, char *, |
| 3537 | XColor *, int)); |
| 3538 | |
| 3539 | /* An entry in a hash table used to cache color definitions of named |
| 3540 | colors. This cache is necessary to speed up XPM image loading in |
| 3541 | case we do color allocations ourselves. Without it, we would need |
| 3542 | a call to XParseColor per pixel in the image. */ |
| 3543 | |
| 3544 | struct xpm_cached_color |
| 3545 | { |
| 3546 | /* Next in collision chain. */ |
| 3547 | struct xpm_cached_color *next; |
| 3548 | |
| 3549 | /* Color definition (RGB and pixel color). */ |
| 3550 | XColor color; |
| 3551 | |
| 3552 | /* Color name. */ |
| 3553 | char name[1]; |
| 3554 | }; |
| 3555 | |
| 3556 | /* The hash table used for the color cache, and its bucket vector |
| 3557 | size. */ |
| 3558 | |
| 3559 | #define XPM_COLOR_CACHE_BUCKETS 1001 |
| 3560 | struct xpm_cached_color **xpm_color_cache; |
| 3561 | |
| 3562 | /* Initialize the color cache. */ |
| 3563 | |
| 3564 | static void |
| 3565 | xpm_init_color_cache (f, attrs) |
| 3566 | struct frame *f; |
| 3567 | XpmAttributes *attrs; |
| 3568 | { |
| 3569 | size_t nbytes = XPM_COLOR_CACHE_BUCKETS * sizeof *xpm_color_cache; |
| 3570 | xpm_color_cache = (struct xpm_cached_color **) xmalloc (nbytes); |
| 3571 | memset (xpm_color_cache, 0, nbytes); |
| 3572 | init_color_table (); |
| 3573 | |
| 3574 | if (attrs->valuemask & XpmColorSymbols) |
| 3575 | { |
| 3576 | int i; |
| 3577 | XColor color; |
| 3578 | |
| 3579 | for (i = 0; i < attrs->numsymbols; ++i) |
| 3580 | if (XParseColor (FRAME_X_DISPLAY (f), FRAME_X_COLORMAP (f), |
| 3581 | attrs->colorsymbols[i].value, &color)) |
| 3582 | { |
| 3583 | color.pixel = lookup_rgb_color (f, color.red, color.green, |
| 3584 | color.blue); |
| 3585 | xpm_cache_color (f, attrs->colorsymbols[i].name, &color, -1); |
| 3586 | } |
| 3587 | } |
| 3588 | } |
| 3589 | |
| 3590 | /* Free the color cache. */ |
| 3591 | |
| 3592 | static void |
| 3593 | xpm_free_color_cache () |
| 3594 | { |
| 3595 | struct xpm_cached_color *p, *next; |
| 3596 | int i; |
| 3597 | |
| 3598 | for (i = 0; i < XPM_COLOR_CACHE_BUCKETS; ++i) |
| 3599 | for (p = xpm_color_cache[i]; p; p = next) |
| 3600 | { |
| 3601 | next = p->next; |
| 3602 | xfree (p); |
| 3603 | } |
| 3604 | |
| 3605 | xfree (xpm_color_cache); |
| 3606 | xpm_color_cache = NULL; |
| 3607 | free_color_table (); |
| 3608 | } |
| 3609 | |
| 3610 | /* Return the bucket index for color named COLOR_NAME in the color |
| 3611 | cache. */ |
| 3612 | |
| 3613 | static int |
| 3614 | xpm_color_bucket (color_name) |
| 3615 | char *color_name; |
| 3616 | { |
| 3617 | unsigned h = 0; |
| 3618 | char *s; |
| 3619 | |
| 3620 | for (s = color_name; *s; ++s) |
| 3621 | h = (h << 2) ^ *s; |
| 3622 | return h %= XPM_COLOR_CACHE_BUCKETS; |
| 3623 | } |
| 3624 | |
| 3625 | |
| 3626 | /* On frame F, cache values COLOR for color with name COLOR_NAME. |
| 3627 | BUCKET, if >= 0, is a precomputed bucket index. Value is the cache |
| 3628 | entry added. */ |
| 3629 | |
| 3630 | static struct xpm_cached_color * |
| 3631 | xpm_cache_color (f, color_name, color, bucket) |
| 3632 | struct frame *f; |
| 3633 | char *color_name; |
| 3634 | XColor *color; |
| 3635 | int bucket; |
| 3636 | { |
| 3637 | size_t nbytes; |
| 3638 | struct xpm_cached_color *p; |
| 3639 | |
| 3640 | if (bucket < 0) |
| 3641 | bucket = xpm_color_bucket (color_name); |
| 3642 | |
| 3643 | nbytes = sizeof *p + strlen (color_name); |
| 3644 | p = (struct xpm_cached_color *) xmalloc (nbytes); |
| 3645 | strcpy (p->name, color_name); |
| 3646 | p->color = *color; |
| 3647 | p->next = xpm_color_cache[bucket]; |
| 3648 | xpm_color_cache[bucket] = p; |
| 3649 | return p; |
| 3650 | } |
| 3651 | |
| 3652 | /* Look up color COLOR_NAME for frame F in the color cache. If found, |
| 3653 | return the cached definition in *COLOR. Otherwise, make a new |
| 3654 | entry in the cache and allocate the color. Value is zero if color |
| 3655 | allocation failed. */ |
| 3656 | |
| 3657 | static int |
| 3658 | xpm_lookup_color (f, color_name, color) |
| 3659 | struct frame *f; |
| 3660 | char *color_name; |
| 3661 | XColor *color; |
| 3662 | { |
| 3663 | struct xpm_cached_color *p; |
| 3664 | int h = xpm_color_bucket (color_name); |
| 3665 | |
| 3666 | for (p = xpm_color_cache[h]; p; p = p->next) |
| 3667 | if (strcmp (p->name, color_name) == 0) |
| 3668 | break; |
| 3669 | |
| 3670 | if (p != NULL) |
| 3671 | *color = p->color; |
| 3672 | else if (XParseColor (FRAME_X_DISPLAY (f), FRAME_X_COLORMAP (f), |
| 3673 | color_name, color)) |
| 3674 | { |
| 3675 | color->pixel = lookup_rgb_color (f, color->red, color->green, |
| 3676 | color->blue); |
| 3677 | p = xpm_cache_color (f, color_name, color, h); |
| 3678 | } |
| 3679 | /* You get `opaque' at least from ImageMagick converting pbm to xpm |
| 3680 | with transparency, and it's useful. */ |
| 3681 | else if (strcmp ("opaque", color_name) == 0) |
| 3682 | { |
| 3683 | bzero (color, sizeof (XColor)); /* Is this necessary/correct? */ |
| 3684 | color->pixel = FRAME_FOREGROUND_PIXEL (f); |
| 3685 | p = xpm_cache_color (f, color_name, color, h); |
| 3686 | } |
| 3687 | |
| 3688 | return p != NULL; |
| 3689 | } |
| 3690 | |
| 3691 | |
| 3692 | /* Callback for allocating color COLOR_NAME. Called from the XPM lib. |
| 3693 | CLOSURE is a pointer to the frame on which we allocate the |
| 3694 | color. Return in *COLOR the allocated color. Value is non-zero |
| 3695 | if successful. */ |
| 3696 | |
| 3697 | static int |
| 3698 | xpm_alloc_color (dpy, cmap, color_name, color, closure) |
| 3699 | Display *dpy; |
| 3700 | Colormap cmap; |
| 3701 | char *color_name; |
| 3702 | XColor *color; |
| 3703 | void *closure; |
| 3704 | { |
| 3705 | return xpm_lookup_color ((struct frame *) closure, color_name, color); |
| 3706 | } |
| 3707 | |
| 3708 | |
| 3709 | /* Callback for freeing NPIXELS colors contained in PIXELS. CLOSURE |
| 3710 | is a pointer to the frame on which we allocate the color. Value is |
| 3711 | non-zero if successful. */ |
| 3712 | |
| 3713 | static int |
| 3714 | xpm_free_colors (dpy, cmap, pixels, npixels, closure) |
| 3715 | Display *dpy; |
| 3716 | Colormap cmap; |
| 3717 | Pixel *pixels; |
| 3718 | int npixels; |
| 3719 | void *closure; |
| 3720 | { |
| 3721 | return 1; |
| 3722 | } |
| 3723 | |
| 3724 | #endif /* ALLOC_XPM_COLORS */ |
| 3725 | |
| 3726 | |
| 3727 | #ifdef HAVE_NTGUI |
| 3728 | |
| 3729 | /* XPM library details. */ |
| 3730 | |
| 3731 | DEF_IMGLIB_FN (XpmFreeAttributes); |
| 3732 | DEF_IMGLIB_FN (XpmCreateImageFromBuffer); |
| 3733 | DEF_IMGLIB_FN (XpmReadFileToImage); |
| 3734 | DEF_IMGLIB_FN (XImageFree); |
| 3735 | |
| 3736 | static int |
| 3737 | init_xpm_functions (Lisp_Object libraries) |
| 3738 | { |
| 3739 | HMODULE library; |
| 3740 | |
| 3741 | if (!(library = w32_delayed_load (libraries, Qxpm))) |
| 3742 | return 0; |
| 3743 | |
| 3744 | LOAD_IMGLIB_FN (library, XpmFreeAttributes); |
| 3745 | LOAD_IMGLIB_FN (library, XpmCreateImageFromBuffer); |
| 3746 | LOAD_IMGLIB_FN (library, XpmReadFileToImage); |
| 3747 | LOAD_IMGLIB_FN (library, XImageFree); |
| 3748 | return 1; |
| 3749 | } |
| 3750 | |
| 3751 | #endif /* HAVE_NTGUI */ |
| 3752 | |
| 3753 | |
| 3754 | /* Value is non-zero if COLOR_SYMBOLS is a valid color symbols list |
| 3755 | for XPM images. Such a list must consist of conses whose car and |
| 3756 | cdr are strings. */ |
| 3757 | |
| 3758 | static int |
| 3759 | xpm_valid_color_symbols_p (color_symbols) |
| 3760 | Lisp_Object color_symbols; |
| 3761 | { |
| 3762 | while (CONSP (color_symbols)) |
| 3763 | { |
| 3764 | Lisp_Object sym = XCAR (color_symbols); |
| 3765 | if (!CONSP (sym) |
| 3766 | || !STRINGP (XCAR (sym)) |
| 3767 | || !STRINGP (XCDR (sym))) |
| 3768 | break; |
| 3769 | color_symbols = XCDR (color_symbols); |
| 3770 | } |
| 3771 | |
| 3772 | return NILP (color_symbols); |
| 3773 | } |
| 3774 | |
| 3775 | |
| 3776 | /* Value is non-zero if OBJECT is a valid XPM image specification. */ |
| 3777 | |
| 3778 | static int |
| 3779 | xpm_image_p (object) |
| 3780 | Lisp_Object object; |
| 3781 | { |
| 3782 | struct image_keyword fmt[XPM_LAST]; |
| 3783 | bcopy (xpm_format, fmt, sizeof fmt); |
| 3784 | return (parse_image_spec (object, fmt, XPM_LAST, Qxpm) |
| 3785 | /* Either `:file' or `:data' must be present. */ |
| 3786 | && fmt[XPM_FILE].count + fmt[XPM_DATA].count == 1 |
| 3787 | /* Either no `:color-symbols' or it's a list of conses |
| 3788 | whose car and cdr are strings. */ |
| 3789 | && (fmt[XPM_COLOR_SYMBOLS].count == 0 |
| 3790 | || xpm_valid_color_symbols_p (fmt[XPM_COLOR_SYMBOLS].value))); |
| 3791 | } |
| 3792 | |
| 3793 | #endif /* HAVE_XPM || MAC_OS */ |
| 3794 | |
| 3795 | #if defined (HAVE_XPM) && defined (HAVE_X_WINDOWS) |
| 3796 | int |
| 3797 | x_create_bitmap_from_xpm_data (f, bits) |
| 3798 | struct frame *f; |
| 3799 | char **bits; |
| 3800 | { |
| 3801 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); |
| 3802 | int id, rc; |
| 3803 | XpmAttributes attrs; |
| 3804 | Pixmap bitmap, mask; |
| 3805 | |
| 3806 | bzero (&attrs, sizeof attrs); |
| 3807 | |
| 3808 | attrs.visual = FRAME_X_VISUAL (f); |
| 3809 | attrs.colormap = FRAME_X_COLORMAP (f); |
| 3810 | attrs.valuemask |= XpmVisual; |
| 3811 | attrs.valuemask |= XpmColormap; |
| 3812 | |
| 3813 | rc = XpmCreatePixmapFromData (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), |
| 3814 | bits, &bitmap, &mask, &attrs); |
| 3815 | if (rc != XpmSuccess) |
| 3816 | { |
| 3817 | XpmFreeAttributes (&attrs); |
| 3818 | return -1; |
| 3819 | } |
| 3820 | |
| 3821 | id = x_allocate_bitmap_record (f); |
| 3822 | dpyinfo->bitmaps[id - 1].pixmap = bitmap; |
| 3823 | dpyinfo->bitmaps[id - 1].have_mask = 1; |
| 3824 | dpyinfo->bitmaps[id - 1].mask = mask; |
| 3825 | dpyinfo->bitmaps[id - 1].file = NULL; |
| 3826 | dpyinfo->bitmaps[id - 1].height = attrs.height; |
| 3827 | dpyinfo->bitmaps[id - 1].width = attrs.width; |
| 3828 | dpyinfo->bitmaps[id - 1].depth = attrs.depth; |
| 3829 | dpyinfo->bitmaps[id - 1].refcount = 1; |
| 3830 | |
| 3831 | XpmFreeAttributes (&attrs); |
| 3832 | return id; |
| 3833 | } |
| 3834 | #endif /* defined (HAVE_XPM) && defined (HAVE_X_WINDOWS) */ |
| 3835 | |
| 3836 | /* Load image IMG which will be displayed on frame F. Value is |
| 3837 | non-zero if successful. */ |
| 3838 | |
| 3839 | #ifdef HAVE_XPM |
| 3840 | |
| 3841 | static int |
| 3842 | xpm_load (f, img) |
| 3843 | struct frame *f; |
| 3844 | struct image *img; |
| 3845 | { |
| 3846 | int rc; |
| 3847 | XpmAttributes attrs; |
| 3848 | Lisp_Object specified_file, color_symbols; |
| 3849 | #ifdef HAVE_NTGUI |
| 3850 | HDC hdc; |
| 3851 | xpm_XImage * xpm_image = NULL, * xpm_mask = NULL; |
| 3852 | #endif /* HAVE_NTGUI */ |
| 3853 | |
| 3854 | /* Configure the XPM lib. Use the visual of frame F. Allocate |
| 3855 | close colors. Return colors allocated. */ |
| 3856 | bzero (&attrs, sizeof attrs); |
| 3857 | |
| 3858 | #ifndef HAVE_NTGUI |
| 3859 | attrs.visual = FRAME_X_VISUAL (f); |
| 3860 | attrs.colormap = FRAME_X_COLORMAP (f); |
| 3861 | attrs.valuemask |= XpmVisual; |
| 3862 | attrs.valuemask |= XpmColormap; |
| 3863 | #endif /* HAVE_NTGUI */ |
| 3864 | |
| 3865 | #ifdef ALLOC_XPM_COLORS |
| 3866 | /* Allocate colors with our own functions which handle |
| 3867 | failing color allocation more gracefully. */ |
| 3868 | attrs.color_closure = f; |
| 3869 | attrs.alloc_color = xpm_alloc_color; |
| 3870 | attrs.free_colors = xpm_free_colors; |
| 3871 | attrs.valuemask |= XpmAllocColor | XpmFreeColors | XpmColorClosure; |
| 3872 | #else /* not ALLOC_XPM_COLORS */ |
| 3873 | /* Let the XPM lib allocate colors. */ |
| 3874 | attrs.valuemask |= XpmReturnAllocPixels; |
| 3875 | #ifdef XpmAllocCloseColors |
| 3876 | attrs.alloc_close_colors = 1; |
| 3877 | attrs.valuemask |= XpmAllocCloseColors; |
| 3878 | #else /* not XpmAllocCloseColors */ |
| 3879 | attrs.closeness = 600; |
| 3880 | attrs.valuemask |= XpmCloseness; |
| 3881 | #endif /* not XpmAllocCloseColors */ |
| 3882 | #endif /* ALLOC_XPM_COLORS */ |
| 3883 | #ifdef ALLOC_XPM_COLORS |
| 3884 | xpm_init_color_cache (f, &attrs); |
| 3885 | #endif |
| 3886 | |
| 3887 | /* If image specification contains symbolic color definitions, add |
| 3888 | these to `attrs'. */ |
| 3889 | color_symbols = image_spec_value (img->spec, QCcolor_symbols, NULL); |
| 3890 | if (CONSP (color_symbols)) |
| 3891 | { |
| 3892 | Lisp_Object tail; |
| 3893 | XpmColorSymbol *xpm_syms; |
| 3894 | int i, size; |
| 3895 | |
| 3896 | attrs.valuemask |= XpmColorSymbols; |
| 3897 | |
| 3898 | /* Count number of symbols. */ |
| 3899 | attrs.numsymbols = 0; |
| 3900 | for (tail = color_symbols; CONSP (tail); tail = XCDR (tail)) |
| 3901 | ++attrs.numsymbols; |
| 3902 | |
| 3903 | /* Allocate an XpmColorSymbol array. */ |
| 3904 | size = attrs.numsymbols * sizeof *xpm_syms; |
| 3905 | xpm_syms = (XpmColorSymbol *) alloca (size); |
| 3906 | bzero (xpm_syms, size); |
| 3907 | attrs.colorsymbols = xpm_syms; |
| 3908 | |
| 3909 | /* Fill the color symbol array. */ |
| 3910 | for (tail = color_symbols, i = 0; |
| 3911 | CONSP (tail); |
| 3912 | ++i, tail = XCDR (tail)) |
| 3913 | { |
| 3914 | Lisp_Object name = XCAR (XCAR (tail)); |
| 3915 | Lisp_Object color = XCDR (XCAR (tail)); |
| 3916 | xpm_syms[i].name = (char *) alloca (SCHARS (name) + 1); |
| 3917 | strcpy (xpm_syms[i].name, SDATA (name)); |
| 3918 | xpm_syms[i].value = (char *) alloca (SCHARS (color) + 1); |
| 3919 | strcpy (xpm_syms[i].value, SDATA (color)); |
| 3920 | } |
| 3921 | } |
| 3922 | |
| 3923 | /* Create a pixmap for the image, either from a file, or from a |
| 3924 | string buffer containing data in the same format as an XPM file. */ |
| 3925 | #ifdef ALLOC_XPM_COLORS |
| 3926 | xpm_init_color_cache (f, &attrs); |
| 3927 | #endif |
| 3928 | |
| 3929 | specified_file = image_spec_value (img->spec, QCfile, NULL); |
| 3930 | |
| 3931 | #ifdef HAVE_NTGUI |
| 3932 | { |
| 3933 | HDC frame_dc = get_frame_dc (f); |
| 3934 | hdc = CreateCompatibleDC (frame_dc); |
| 3935 | release_frame_dc (f, frame_dc); |
| 3936 | } |
| 3937 | #endif /* HAVE_NTGUI */ |
| 3938 | |
| 3939 | if (STRINGP (specified_file)) |
| 3940 | { |
| 3941 | Lisp_Object file = x_find_image_file (specified_file); |
| 3942 | if (!STRINGP (file)) |
| 3943 | { |
| 3944 | image_error ("Cannot find image file `%s'", specified_file, Qnil); |
| 3945 | return 0; |
| 3946 | } |
| 3947 | |
| 3948 | #ifdef HAVE_NTGUI |
| 3949 | /* XpmReadFileToPixmap is not available in the Windows port of |
| 3950 | libxpm. But XpmReadFileToImage almost does what we want. */ |
| 3951 | rc = fn_XpmReadFileToImage (&hdc, SDATA (file), |
| 3952 | &xpm_image, &xpm_mask, |
| 3953 | &attrs); |
| 3954 | #else |
| 3955 | rc = XpmReadFileToPixmap (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), |
| 3956 | SDATA (file), &img->pixmap, &img->mask, |
| 3957 | &attrs); |
| 3958 | #endif /* HAVE_NTGUI */ |
| 3959 | } |
| 3960 | else |
| 3961 | { |
| 3962 | Lisp_Object buffer = image_spec_value (img->spec, QCdata, NULL); |
| 3963 | #ifdef HAVE_NTGUI |
| 3964 | /* XpmCreatePixmapFromBuffer is not available in the Windows port |
| 3965 | of libxpm. But XpmCreateImageFromBuffer almost does what we want. */ |
| 3966 | rc = fn_XpmCreateImageFromBuffer (&hdc, SDATA (buffer), |
| 3967 | &xpm_image, &xpm_mask, |
| 3968 | &attrs); |
| 3969 | #else |
| 3970 | rc = XpmCreatePixmapFromBuffer (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), |
| 3971 | SDATA (buffer), |
| 3972 | &img->pixmap, &img->mask, |
| 3973 | &attrs); |
| 3974 | #endif /* HAVE_NTGUI */ |
| 3975 | } |
| 3976 | |
| 3977 | if (rc == XpmSuccess) |
| 3978 | { |
| 3979 | #if defined (COLOR_TABLE_SUPPORT) && defined (ALLOC_XPM_COLORS) |
| 3980 | img->colors = colors_in_color_table (&img->ncolors); |
| 3981 | #else /* not ALLOC_XPM_COLORS */ |
| 3982 | int i; |
| 3983 | |
| 3984 | #ifdef HAVE_NTGUI |
| 3985 | /* W32 XPM uses XImage to wrap what W32 Emacs calls a Pixmap, |
| 3986 | plus some duplicate attributes. */ |
| 3987 | if (xpm_image && xpm_image->bitmap) |
| 3988 | { |
| 3989 | img->pixmap = xpm_image->bitmap; |
| 3990 | /* XImageFree in libXpm frees XImage struct without destroying |
| 3991 | the bitmap, which is what we want. */ |
| 3992 | fn_XImageFree (xpm_image); |
| 3993 | } |
| 3994 | if (xpm_mask && xpm_mask->bitmap) |
| 3995 | { |
| 3996 | /* The mask appears to be inverted compared with what we expect. |
| 3997 | TODO: invert our expectations. See other places where we |
| 3998 | have to invert bits because our idea of masks is backwards. */ |
| 3999 | HGDIOBJ old_obj; |
| 4000 | old_obj = SelectObject (hdc, xpm_mask->bitmap); |
| 4001 | |
| 4002 | PatBlt (hdc, 0, 0, xpm_mask->width, xpm_mask->height, DSTINVERT); |
| 4003 | SelectObject (hdc, old_obj); |
| 4004 | |
| 4005 | img->mask = xpm_mask->bitmap; |
| 4006 | fn_XImageFree (xpm_mask); |
| 4007 | DeleteDC (hdc); |
| 4008 | } |
| 4009 | |
| 4010 | DeleteDC (hdc); |
| 4011 | #endif /* HAVE_NTGUI */ |
| 4012 | |
| 4013 | /* Remember allocated colors. */ |
| 4014 | img->ncolors = attrs.nalloc_pixels; |
| 4015 | img->colors = (unsigned long *) xmalloc (img->ncolors |
| 4016 | * sizeof *img->colors); |
| 4017 | for (i = 0; i < attrs.nalloc_pixels; ++i) |
| 4018 | { |
| 4019 | img->colors[i] = attrs.alloc_pixels[i]; |
| 4020 | #ifdef DEBUG_X_COLORS |
| 4021 | register_color (img->colors[i]); |
| 4022 | #endif |
| 4023 | } |
| 4024 | #endif /* not ALLOC_XPM_COLORS */ |
| 4025 | |
| 4026 | img->width = attrs.width; |
| 4027 | img->height = attrs.height; |
| 4028 | xassert (img->width > 0 && img->height > 0); |
| 4029 | |
| 4030 | /* The call to XpmFreeAttributes below frees attrs.alloc_pixels. */ |
| 4031 | #ifdef HAVE_NTGUI |
| 4032 | fn_XpmFreeAttributes (&attrs); |
| 4033 | #else |
| 4034 | XpmFreeAttributes (&attrs); |
| 4035 | #endif /* HAVE_NTGUI */ |
| 4036 | } |
| 4037 | else |
| 4038 | { |
| 4039 | #ifdef HAVE_NTGUI |
| 4040 | DeleteDC (hdc); |
| 4041 | #endif /* HAVE_NTGUI */ |
| 4042 | |
| 4043 | switch (rc) |
| 4044 | { |
| 4045 | case XpmOpenFailed: |
| 4046 | image_error ("Error opening XPM file (%s)", img->spec, Qnil); |
| 4047 | break; |
| 4048 | |
| 4049 | case XpmFileInvalid: |
| 4050 | image_error ("Invalid XPM file (%s)", img->spec, Qnil); |
| 4051 | break; |
| 4052 | |
| 4053 | case XpmNoMemory: |
| 4054 | image_error ("Out of memory (%s)", img->spec, Qnil); |
| 4055 | break; |
| 4056 | |
| 4057 | case XpmColorFailed: |
| 4058 | image_error ("Color allocation error (%s)", img->spec, Qnil); |
| 4059 | break; |
| 4060 | |
| 4061 | default: |
| 4062 | image_error ("Unknown error (%s)", img->spec, Qnil); |
| 4063 | break; |
| 4064 | } |
| 4065 | } |
| 4066 | |
| 4067 | #ifdef ALLOC_XPM_COLORS |
| 4068 | xpm_free_color_cache (); |
| 4069 | #endif |
| 4070 | return rc == XpmSuccess; |
| 4071 | } |
| 4072 | |
| 4073 | #endif /* HAVE_XPM */ |
| 4074 | |
| 4075 | #ifdef MAC_OS |
| 4076 | |
| 4077 | /* XPM support functions for Mac OS where libxpm is not available. |
| 4078 | Only XPM version 3 (without any extensions) is supported. */ |
| 4079 | |
| 4080 | static int xpm_scan P_ ((unsigned char **, unsigned char *, |
| 4081 | unsigned char **, int *)); |
| 4082 | static Lisp_Object xpm_make_color_table_v |
| 4083 | P_ ((void (**) (Lisp_Object, unsigned char *, int, Lisp_Object), |
| 4084 | Lisp_Object (**) (Lisp_Object, unsigned char *, int))); |
| 4085 | static void xpm_put_color_table_v P_ ((Lisp_Object, unsigned char *, |
| 4086 | int, Lisp_Object)); |
| 4087 | static Lisp_Object xpm_get_color_table_v P_ ((Lisp_Object, |
| 4088 | unsigned char *, int)); |
| 4089 | static Lisp_Object xpm_make_color_table_h |
| 4090 | P_ ((void (**) (Lisp_Object, unsigned char *, int, Lisp_Object), |
| 4091 | Lisp_Object (**) (Lisp_Object, unsigned char *, int))); |
| 4092 | static void xpm_put_color_table_h P_ ((Lisp_Object, unsigned char *, |
| 4093 | int, Lisp_Object)); |
| 4094 | static Lisp_Object xpm_get_color_table_h P_ ((Lisp_Object, |
| 4095 | unsigned char *, int)); |
| 4096 | static int xpm_str_to_color_key P_ ((char *)); |
| 4097 | static int xpm_load_image P_ ((struct frame *, struct image *, |
| 4098 | unsigned char *, unsigned char *)); |
| 4099 | |
| 4100 | /* Tokens returned from xpm_scan. */ |
| 4101 | |
| 4102 | enum xpm_token |
| 4103 | { |
| 4104 | XPM_TK_IDENT = 256, |
| 4105 | XPM_TK_STRING, |
| 4106 | XPM_TK_EOF |
| 4107 | }; |
| 4108 | |
| 4109 | /* Scan an XPM data and return a character (< 256) or a token defined |
| 4110 | by enum xpm_token above. *S and END are the start (inclusive) and |
| 4111 | the end (exclusive) addresses of the data, respectively. Advance |
| 4112 | *S while scanning. If token is either XPM_TK_IDENT or |
| 4113 | XPM_TK_STRING, *BEG and *LEN are set to the start address and the |
| 4114 | length of the corresponding token, respectively. */ |
| 4115 | |
| 4116 | static int |
| 4117 | xpm_scan (s, end, beg, len) |
| 4118 | unsigned char **s, *end, **beg; |
| 4119 | int *len; |
| 4120 | { |
| 4121 | int c; |
| 4122 | |
| 4123 | while (*s < end) |
| 4124 | { |
| 4125 | /* Skip white-space. */ |
| 4126 | while (*s < end && (c = *(*s)++, isspace (c))) |
| 4127 | ; |
| 4128 | |
| 4129 | /* gnus-pointer.xpm uses '-' in its identifier. |
| 4130 | sb-dir-plus.xpm uses '+' in its identifier. */ |
| 4131 | if (isalpha (c) || c == '_' || c == '-' || c == '+') |
| 4132 | { |
| 4133 | *beg = *s - 1; |
| 4134 | while (*s < end && |
| 4135 | (c = **s, isalnum (c) || c == '_' || c == '-' || c == '+')) |
| 4136 | ++*s; |
| 4137 | *len = *s - *beg; |
| 4138 | return XPM_TK_IDENT; |
| 4139 | } |
| 4140 | else if (c == '"') |
| 4141 | { |
| 4142 | *beg = *s; |
| 4143 | while (*s < end && **s != '"') |
| 4144 | ++*s; |
| 4145 | *len = *s - *beg; |
| 4146 | if (*s < end) |
| 4147 | ++*s; |
| 4148 | return XPM_TK_STRING; |
| 4149 | } |
| 4150 | else if (c == '/') |
| 4151 | { |
| 4152 | if (*s < end && **s == '*') |
| 4153 | { |
| 4154 | /* C-style comment. */ |
| 4155 | ++*s; |
| 4156 | do |
| 4157 | { |
| 4158 | while (*s < end && *(*s)++ != '*') |
| 4159 | ; |
| 4160 | } |
| 4161 | while (*s < end && **s != '/'); |
| 4162 | if (*s < end) |
| 4163 | ++*s; |
| 4164 | } |
| 4165 | else |
| 4166 | return c; |
| 4167 | } |
| 4168 | else |
| 4169 | return c; |
| 4170 | } |
| 4171 | |
| 4172 | return XPM_TK_EOF; |
| 4173 | } |
| 4174 | |
| 4175 | /* Functions for color table lookup in XPM data. A Key is a string |
| 4176 | specifying the color of each pixel in XPM data. A value is either |
| 4177 | an integer that specifies a pixel color, Qt that specifies |
| 4178 | transparency, or Qnil for the unspecified color. If the length of |
| 4179 | the key string is one, a vector is used as a table. Otherwise, a |
| 4180 | hash table is used. */ |
| 4181 | |
| 4182 | static Lisp_Object |
| 4183 | xpm_make_color_table_v (put_func, get_func) |
| 4184 | void (**put_func) (Lisp_Object, unsigned char *, int, Lisp_Object); |
| 4185 | Lisp_Object (**get_func) (Lisp_Object, unsigned char *, int); |
| 4186 | { |
| 4187 | *put_func = xpm_put_color_table_v; |
| 4188 | *get_func = xpm_get_color_table_v; |
| 4189 | return Fmake_vector (make_number (256), Qnil); |
| 4190 | } |
| 4191 | |
| 4192 | static void |
| 4193 | xpm_put_color_table_v (color_table, chars_start, chars_len, color) |
| 4194 | Lisp_Object color_table; |
| 4195 | unsigned char *chars_start; |
| 4196 | int chars_len; |
| 4197 | Lisp_Object color; |
| 4198 | { |
| 4199 | XVECTOR (color_table)->contents[*chars_start] = color; |
| 4200 | } |
| 4201 | |
| 4202 | static Lisp_Object |
| 4203 | xpm_get_color_table_v (color_table, chars_start, chars_len) |
| 4204 | Lisp_Object color_table; |
| 4205 | unsigned char *chars_start; |
| 4206 | int chars_len; |
| 4207 | { |
| 4208 | return XVECTOR (color_table)->contents[*chars_start]; |
| 4209 | } |
| 4210 | |
| 4211 | static Lisp_Object |
| 4212 | xpm_make_color_table_h (put_func, get_func) |
| 4213 | void (**put_func) (Lisp_Object, unsigned char *, int, Lisp_Object); |
| 4214 | Lisp_Object (**get_func) (Lisp_Object, unsigned char *, int); |
| 4215 | { |
| 4216 | *put_func = xpm_put_color_table_h; |
| 4217 | *get_func = xpm_get_color_table_h; |
| 4218 | return make_hash_table (Qequal, make_number (DEFAULT_HASH_SIZE), |
| 4219 | make_float (DEFAULT_REHASH_SIZE), |
| 4220 | make_float (DEFAULT_REHASH_THRESHOLD), |
| 4221 | Qnil, Qnil, Qnil); |
| 4222 | } |
| 4223 | |
| 4224 | static void |
| 4225 | xpm_put_color_table_h (color_table, chars_start, chars_len, color) |
| 4226 | Lisp_Object color_table; |
| 4227 | unsigned char *chars_start; |
| 4228 | int chars_len; |
| 4229 | Lisp_Object color; |
| 4230 | { |
| 4231 | struct Lisp_Hash_Table *table = XHASH_TABLE (color_table); |
| 4232 | unsigned hash_code; |
| 4233 | Lisp_Object chars = make_unibyte_string (chars_start, chars_len); |
| 4234 | |
| 4235 | hash_lookup (table, chars, &hash_code); |
| 4236 | hash_put (table, chars, color, hash_code); |
| 4237 | } |
| 4238 | |
| 4239 | static Lisp_Object |
| 4240 | xpm_get_color_table_h (color_table, chars_start, chars_len) |
| 4241 | Lisp_Object color_table; |
| 4242 | unsigned char *chars_start; |
| 4243 | int chars_len; |
| 4244 | { |
| 4245 | struct Lisp_Hash_Table *table = XHASH_TABLE (color_table); |
| 4246 | int i = hash_lookup (table, make_unibyte_string (chars_start, chars_len), |
| 4247 | NULL); |
| 4248 | |
| 4249 | return i >= 0 ? HASH_VALUE (table, i) : Qnil; |
| 4250 | } |
| 4251 | |
| 4252 | enum xpm_color_key { |
| 4253 | XPM_COLOR_KEY_S, |
| 4254 | XPM_COLOR_KEY_M, |
| 4255 | XPM_COLOR_KEY_G4, |
| 4256 | XPM_COLOR_KEY_G, |
| 4257 | XPM_COLOR_KEY_C |
| 4258 | }; |
| 4259 | |
| 4260 | static char xpm_color_key_strings[][4] = {"s", "m", "g4", "g", "c"}; |
| 4261 | |
| 4262 | static int |
| 4263 | xpm_str_to_color_key (s) |
| 4264 | char *s; |
| 4265 | { |
| 4266 | int i; |
| 4267 | |
| 4268 | for (i = 0; |
| 4269 | i < sizeof xpm_color_key_strings / sizeof xpm_color_key_strings[0]; |
| 4270 | i++) |
| 4271 | if (strcmp (xpm_color_key_strings[i], s) == 0) |
| 4272 | return i; |
| 4273 | return -1; |
| 4274 | } |
| 4275 | |
| 4276 | static int |
| 4277 | xpm_load_image (f, img, contents, end) |
| 4278 | struct frame *f; |
| 4279 | struct image *img; |
| 4280 | unsigned char *contents, *end; |
| 4281 | { |
| 4282 | unsigned char *s = contents, *beg, *str; |
| 4283 | unsigned char buffer[BUFSIZ]; |
| 4284 | int width, height, x, y; |
| 4285 | int num_colors, chars_per_pixel; |
| 4286 | int len, LA1; |
| 4287 | void (*put_color_table) (Lisp_Object, unsigned char *, int, Lisp_Object); |
| 4288 | Lisp_Object (*get_color_table) (Lisp_Object, unsigned char *, int); |
| 4289 | Lisp_Object frame, color_symbols, color_table; |
| 4290 | int best_key, have_mask = 0; |
| 4291 | XImagePtr ximg = NULL, mask_img = NULL; |
| 4292 | |
| 4293 | #define match() \ |
| 4294 | LA1 = xpm_scan (&s, end, &beg, &len) |
| 4295 | |
| 4296 | #define expect(TOKEN) \ |
| 4297 | if (LA1 != (TOKEN)) \ |
| 4298 | goto failure; \ |
| 4299 | else \ |
| 4300 | match () |
| 4301 | |
| 4302 | #define expect_ident(IDENT) \ |
| 4303 | if (LA1 == XPM_TK_IDENT \ |
| 4304 | && strlen ((IDENT)) == len && memcmp ((IDENT), beg, len) == 0) \ |
| 4305 | match (); \ |
| 4306 | else \ |
| 4307 | goto failure |
| 4308 | |
| 4309 | if (!(end - s >= 9 && memcmp (s, "/* XPM */", 9) == 0)) |
| 4310 | goto failure; |
| 4311 | s += 9; |
| 4312 | match(); |
| 4313 | expect_ident ("static"); |
| 4314 | expect_ident ("char"); |
| 4315 | expect ('*'); |
| 4316 | expect (XPM_TK_IDENT); |
| 4317 | expect ('['); |
| 4318 | expect (']'); |
| 4319 | expect ('='); |
| 4320 | expect ('{'); |
| 4321 | expect (XPM_TK_STRING); |
| 4322 | if (len >= BUFSIZ) |
| 4323 | goto failure; |
| 4324 | memcpy (buffer, beg, len); |
| 4325 | buffer[len] = '\0'; |
| 4326 | if (sscanf (buffer, "%d %d %d %d", &width, &height, |
| 4327 | &num_colors, &chars_per_pixel) != 4 |
| 4328 | || width <= 0 || height <= 0 |
| 4329 | || num_colors <= 0 || chars_per_pixel <= 0) |
| 4330 | goto failure; |
| 4331 | |
| 4332 | if (!check_image_size (f, width, height)) |
| 4333 | { |
| 4334 | image_error ("Invalid image size", Qnil, Qnil); |
| 4335 | goto failure; |
| 4336 | } |
| 4337 | |
| 4338 | expect (','); |
| 4339 | |
| 4340 | XSETFRAME (frame, f); |
| 4341 | if (!NILP (Fxw_display_color_p (frame))) |
| 4342 | best_key = XPM_COLOR_KEY_C; |
| 4343 | else if (!NILP (Fx_display_grayscale_p (frame))) |
| 4344 | best_key = (XFASTINT (Fx_display_planes (frame)) > 2 |
| 4345 | ? XPM_COLOR_KEY_G : XPM_COLOR_KEY_G4); |
| 4346 | else |
| 4347 | best_key = XPM_COLOR_KEY_M; |
| 4348 | |
| 4349 | color_symbols = image_spec_value (img->spec, QCcolor_symbols, NULL); |
| 4350 | if (chars_per_pixel == 1) |
| 4351 | color_table = xpm_make_color_table_v (&put_color_table, |
| 4352 | &get_color_table); |
| 4353 | else |
| 4354 | color_table = xpm_make_color_table_h (&put_color_table, |
| 4355 | &get_color_table); |
| 4356 | |
| 4357 | while (num_colors-- > 0) |
| 4358 | { |
| 4359 | unsigned char *color, *max_color; |
| 4360 | int key, next_key, max_key = 0; |
| 4361 | Lisp_Object symbol_color = Qnil, color_val; |
| 4362 | XColor cdef; |
| 4363 | |
| 4364 | expect (XPM_TK_STRING); |
| 4365 | if (len <= chars_per_pixel || len >= BUFSIZ + chars_per_pixel) |
| 4366 | goto failure; |
| 4367 | memcpy (buffer, beg + chars_per_pixel, len - chars_per_pixel); |
| 4368 | buffer[len - chars_per_pixel] = '\0'; |
| 4369 | |
| 4370 | str = strtok (buffer, " \t"); |
| 4371 | if (str == NULL) |
| 4372 | goto failure; |
| 4373 | key = xpm_str_to_color_key (str); |
| 4374 | if (key < 0) |
| 4375 | goto failure; |
| 4376 | do |
| 4377 | { |
| 4378 | color = strtok (NULL, " \t"); |
| 4379 | if (color == NULL) |
| 4380 | goto failure; |
| 4381 | |
| 4382 | while ((str = strtok (NULL, " \t")) != NULL) |
| 4383 | { |
| 4384 | next_key = xpm_str_to_color_key (str); |
| 4385 | if (next_key >= 0) |
| 4386 | break; |
| 4387 | color[strlen (color)] = ' '; |
| 4388 | } |
| 4389 | |
| 4390 | if (key == XPM_COLOR_KEY_S) |
| 4391 | { |
| 4392 | if (NILP (symbol_color)) |
| 4393 | symbol_color = build_string (color); |
| 4394 | } |
| 4395 | else if (max_key < key && key <= best_key) |
| 4396 | { |
| 4397 | max_key = key; |
| 4398 | max_color = color; |
| 4399 | } |
| 4400 | key = next_key; |
| 4401 | } |
| 4402 | while (str); |
| 4403 | |
| 4404 | color_val = Qnil; |
| 4405 | if (!NILP (color_symbols) && !NILP (symbol_color)) |
| 4406 | { |
| 4407 | Lisp_Object specified_color = Fassoc (symbol_color, color_symbols); |
| 4408 | |
| 4409 | if (CONSP (specified_color) && STRINGP (XCDR (specified_color))) |
| 4410 | { |
| 4411 | if (xstricmp (SDATA (XCDR (specified_color)), "None") == 0) |
| 4412 | color_val = Qt; |
| 4413 | else if (x_defined_color (f, SDATA (XCDR (specified_color)), |
| 4414 | &cdef, 0)) |
| 4415 | color_val = make_number (cdef.pixel); |
| 4416 | } |
| 4417 | } |
| 4418 | if (NILP (color_val) && max_key > 0) |
| 4419 | { |
| 4420 | if (xstricmp (max_color, "None") == 0) |
| 4421 | color_val = Qt; |
| 4422 | else if (x_defined_color (f, max_color, &cdef, 0)) |
| 4423 | color_val = make_number (cdef.pixel); |
| 4424 | } |
| 4425 | if (!NILP (color_val)) |
| 4426 | (*put_color_table) (color_table, beg, chars_per_pixel, color_val); |
| 4427 | |
| 4428 | expect (','); |
| 4429 | } |
| 4430 | |
| 4431 | if (!x_create_x_image_and_pixmap (f, width, height, 0, |
| 4432 | &ximg, &img->pixmap) |
| 4433 | || !x_create_x_image_and_pixmap (f, width, height, 1, |
| 4434 | &mask_img, &img->mask)) |
| 4435 | { |
| 4436 | image_error ("Out of memory (%s)", img->spec, Qnil); |
| 4437 | goto error; |
| 4438 | } |
| 4439 | |
| 4440 | for (y = 0; y < height; y++) |
| 4441 | { |
| 4442 | expect (XPM_TK_STRING); |
| 4443 | str = beg; |
| 4444 | if (len < width * chars_per_pixel) |
| 4445 | goto failure; |
| 4446 | for (x = 0; x < width; x++, str += chars_per_pixel) |
| 4447 | { |
| 4448 | Lisp_Object color_val = |
| 4449 | (*get_color_table) (color_table, str, chars_per_pixel); |
| 4450 | |
| 4451 | XPutPixel (ximg, x, y, |
| 4452 | (INTEGERP (color_val) ? XINT (color_val) |
| 4453 | : FRAME_FOREGROUND_PIXEL (f))); |
| 4454 | XPutPixel (mask_img, x, y, |
| 4455 | (!EQ (color_val, Qt) ? PIX_MASK_DRAW |
| 4456 | : (have_mask = 1, PIX_MASK_RETAIN))); |
| 4457 | } |
| 4458 | if (y + 1 < height) |
| 4459 | expect (','); |
| 4460 | } |
| 4461 | |
| 4462 | img->width = width; |
| 4463 | img->height = height; |
| 4464 | |
| 4465 | x_put_x_image (f, ximg, img->pixmap, width, height); |
| 4466 | x_destroy_x_image (ximg); |
| 4467 | if (have_mask) |
| 4468 | { |
| 4469 | /* Fill in the background_transparent field while we have the |
| 4470 | mask handy. */ |
| 4471 | image_background_transparent (img, f, mask_img); |
| 4472 | |
| 4473 | x_put_x_image (f, mask_img, img->mask, width, height); |
| 4474 | x_destroy_x_image (mask_img); |
| 4475 | } |
| 4476 | else |
| 4477 | { |
| 4478 | x_destroy_x_image (mask_img); |
| 4479 | Free_Pixmap (FRAME_X_DISPLAY (f), img->mask); |
| 4480 | img->mask = NO_PIXMAP; |
| 4481 | } |
| 4482 | |
| 4483 | return 1; |
| 4484 | |
| 4485 | failure: |
| 4486 | image_error ("Invalid XPM file (%s)", img->spec, Qnil); |
| 4487 | error: |
| 4488 | x_destroy_x_image (ximg); |
| 4489 | x_destroy_x_image (mask_img); |
| 4490 | x_clear_image (f, img); |
| 4491 | return 0; |
| 4492 | |
| 4493 | #undef match |
| 4494 | #undef expect |
| 4495 | #undef expect_ident |
| 4496 | } |
| 4497 | |
| 4498 | static int |
| 4499 | xpm_load (f, img) |
| 4500 | struct frame *f; |
| 4501 | struct image *img; |
| 4502 | { |
| 4503 | int success_p = 0; |
| 4504 | Lisp_Object file_name; |
| 4505 | |
| 4506 | /* If IMG->spec specifies a file name, create a non-file spec from it. */ |
| 4507 | file_name = image_spec_value (img->spec, QCfile, NULL); |
| 4508 | if (STRINGP (file_name)) |
| 4509 | { |
| 4510 | Lisp_Object file; |
| 4511 | unsigned char *contents; |
| 4512 | int size; |
| 4513 | struct gcpro gcpro1; |
| 4514 | |
| 4515 | file = x_find_image_file (file_name); |
| 4516 | GCPRO1 (file); |
| 4517 | if (!STRINGP (file)) |
| 4518 | { |
| 4519 | image_error ("Cannot find image file `%s'", file_name, Qnil); |
| 4520 | UNGCPRO; |
| 4521 | return 0; |
| 4522 | } |
| 4523 | |
| 4524 | contents = slurp_file (SDATA (file), &size); |
| 4525 | if (contents == NULL) |
| 4526 | { |
| 4527 | image_error ("Error loading XPM image `%s'", img->spec, Qnil); |
| 4528 | UNGCPRO; |
| 4529 | return 0; |
| 4530 | } |
| 4531 | |
| 4532 | success_p = xpm_load_image (f, img, contents, contents + size); |
| 4533 | xfree (contents); |
| 4534 | UNGCPRO; |
| 4535 | } |
| 4536 | else |
| 4537 | { |
| 4538 | Lisp_Object data; |
| 4539 | |
| 4540 | data = image_spec_value (img->spec, QCdata, NULL); |
| 4541 | success_p = xpm_load_image (f, img, SDATA (data), |
| 4542 | SDATA (data) + SBYTES (data)); |
| 4543 | } |
| 4544 | |
| 4545 | return success_p; |
| 4546 | } |
| 4547 | |
| 4548 | #endif /* MAC_OS */ |
| 4549 | |
| 4550 | |
| 4551 | \f |
| 4552 | /*********************************************************************** |
| 4553 | Color table |
| 4554 | ***********************************************************************/ |
| 4555 | |
| 4556 | #ifdef COLOR_TABLE_SUPPORT |
| 4557 | |
| 4558 | /* An entry in the color table mapping an RGB color to a pixel color. */ |
| 4559 | |
| 4560 | struct ct_color |
| 4561 | { |
| 4562 | int r, g, b; |
| 4563 | unsigned long pixel; |
| 4564 | |
| 4565 | /* Next in color table collision list. */ |
| 4566 | struct ct_color *next; |
| 4567 | }; |
| 4568 | |
| 4569 | /* The bucket vector size to use. Must be prime. */ |
| 4570 | |
| 4571 | #define CT_SIZE 101 |
| 4572 | |
| 4573 | /* Value is a hash of the RGB color given by R, G, and B. */ |
| 4574 | |
| 4575 | #define CT_HASH_RGB(R, G, B) (((R) << 16) ^ ((G) << 8) ^ (B)) |
| 4576 | |
| 4577 | /* The color hash table. */ |
| 4578 | |
| 4579 | struct ct_color **ct_table; |
| 4580 | |
| 4581 | /* Number of entries in the color table. */ |
| 4582 | |
| 4583 | int ct_colors_allocated; |
| 4584 | |
| 4585 | /* Initialize the color table. */ |
| 4586 | |
| 4587 | static void |
| 4588 | init_color_table () |
| 4589 | { |
| 4590 | int size = CT_SIZE * sizeof (*ct_table); |
| 4591 | ct_table = (struct ct_color **) xmalloc (size); |
| 4592 | bzero (ct_table, size); |
| 4593 | ct_colors_allocated = 0; |
| 4594 | } |
| 4595 | |
| 4596 | |
| 4597 | /* Free memory associated with the color table. */ |
| 4598 | |
| 4599 | static void |
| 4600 | free_color_table () |
| 4601 | { |
| 4602 | int i; |
| 4603 | struct ct_color *p, *next; |
| 4604 | |
| 4605 | for (i = 0; i < CT_SIZE; ++i) |
| 4606 | for (p = ct_table[i]; p; p = next) |
| 4607 | { |
| 4608 | next = p->next; |
| 4609 | xfree (p); |
| 4610 | } |
| 4611 | |
| 4612 | xfree (ct_table); |
| 4613 | ct_table = NULL; |
| 4614 | } |
| 4615 | |
| 4616 | |
| 4617 | /* Value is a pixel color for RGB color R, G, B on frame F. If an |
| 4618 | entry for that color already is in the color table, return the |
| 4619 | pixel color of that entry. Otherwise, allocate a new color for R, |
| 4620 | G, B, and make an entry in the color table. */ |
| 4621 | |
| 4622 | static unsigned long |
| 4623 | lookup_rgb_color (f, r, g, b) |
| 4624 | struct frame *f; |
| 4625 | int r, g, b; |
| 4626 | { |
| 4627 | unsigned hash = CT_HASH_RGB (r, g, b); |
| 4628 | int i = hash % CT_SIZE; |
| 4629 | struct ct_color *p; |
| 4630 | Display_Info *dpyinfo; |
| 4631 | |
| 4632 | /* Handle TrueColor visuals specially, which improves performance by |
| 4633 | two orders of magnitude. Freeing colors on TrueColor visuals is |
| 4634 | a nop, and pixel colors specify RGB values directly. See also |
| 4635 | the Xlib spec, chapter 3.1. */ |
| 4636 | dpyinfo = FRAME_X_DISPLAY_INFO (f); |
| 4637 | if (dpyinfo->red_bits > 0) |
| 4638 | { |
| 4639 | unsigned long pr, pg, pb; |
| 4640 | |
| 4641 | /* Apply gamma-correction like normal color allocation does. */ |
| 4642 | if (f->gamma) |
| 4643 | { |
| 4644 | XColor color; |
| 4645 | color.red = r, color.green = g, color.blue = b; |
| 4646 | gamma_correct (f, &color); |
| 4647 | r = color.red, g = color.green, b = color.blue; |
| 4648 | } |
| 4649 | |
| 4650 | /* Scale down RGB values to the visual's bits per RGB, and shift |
| 4651 | them to the right position in the pixel color. Note that the |
| 4652 | original RGB values are 16-bit values, as usual in X. */ |
| 4653 | pr = (r >> (16 - dpyinfo->red_bits)) << dpyinfo->red_offset; |
| 4654 | pg = (g >> (16 - dpyinfo->green_bits)) << dpyinfo->green_offset; |
| 4655 | pb = (b >> (16 - dpyinfo->blue_bits)) << dpyinfo->blue_offset; |
| 4656 | |
| 4657 | /* Assemble the pixel color. */ |
| 4658 | return pr | pg | pb; |
| 4659 | } |
| 4660 | |
| 4661 | for (p = ct_table[i]; p; p = p->next) |
| 4662 | if (p->r == r && p->g == g && p->b == b) |
| 4663 | break; |
| 4664 | |
| 4665 | if (p == NULL) |
| 4666 | { |
| 4667 | |
| 4668 | #ifdef HAVE_X_WINDOWS |
| 4669 | XColor color; |
| 4670 | Colormap cmap; |
| 4671 | int rc; |
| 4672 | |
| 4673 | color.red = r; |
| 4674 | color.green = g; |
| 4675 | color.blue = b; |
| 4676 | |
| 4677 | cmap = FRAME_X_COLORMAP (f); |
| 4678 | rc = x_alloc_nearest_color (f, cmap, &color); |
| 4679 | if (rc) |
| 4680 | { |
| 4681 | ++ct_colors_allocated; |
| 4682 | p = (struct ct_color *) xmalloc (sizeof *p); |
| 4683 | p->r = r; |
| 4684 | p->g = g; |
| 4685 | p->b = b; |
| 4686 | p->pixel = color.pixel; |
| 4687 | p->next = ct_table[i]; |
| 4688 | ct_table[i] = p; |
| 4689 | } |
| 4690 | else |
| 4691 | return FRAME_FOREGROUND_PIXEL (f); |
| 4692 | |
| 4693 | #else |
| 4694 | COLORREF color; |
| 4695 | #ifdef HAVE_NTGUI |
| 4696 | color = PALETTERGB (r, g, b); |
| 4697 | #else |
| 4698 | color = RGB_TO_ULONG (r, g, b); |
| 4699 | #endif /* HAVE_NTGUI */ |
| 4700 | ++ct_colors_allocated; |
| 4701 | p = (struct ct_color *) xmalloc (sizeof *p); |
| 4702 | p->r = r; |
| 4703 | p->g = g; |
| 4704 | p->b = b; |
| 4705 | p->pixel = color; |
| 4706 | p->next = ct_table[i]; |
| 4707 | ct_table[i] = p; |
| 4708 | #endif /* HAVE_X_WINDOWS */ |
| 4709 | |
| 4710 | } |
| 4711 | |
| 4712 | return p->pixel; |
| 4713 | } |
| 4714 | |
| 4715 | |
| 4716 | /* Look up pixel color PIXEL which is used on frame F in the color |
| 4717 | table. If not already present, allocate it. Value is PIXEL. */ |
| 4718 | |
| 4719 | static unsigned long |
| 4720 | lookup_pixel_color (f, pixel) |
| 4721 | struct frame *f; |
| 4722 | unsigned long pixel; |
| 4723 | { |
| 4724 | int i = pixel % CT_SIZE; |
| 4725 | struct ct_color *p; |
| 4726 | |
| 4727 | for (p = ct_table[i]; p; p = p->next) |
| 4728 | if (p->pixel == pixel) |
| 4729 | break; |
| 4730 | |
| 4731 | if (p == NULL) |
| 4732 | { |
| 4733 | XColor color; |
| 4734 | Colormap cmap; |
| 4735 | int rc; |
| 4736 | |
| 4737 | #ifdef HAVE_X_WINDOWS |
| 4738 | cmap = FRAME_X_COLORMAP (f); |
| 4739 | color.pixel = pixel; |
| 4740 | x_query_color (f, &color); |
| 4741 | rc = x_alloc_nearest_color (f, cmap, &color); |
| 4742 | #else |
| 4743 | BLOCK_INPUT; |
| 4744 | cmap = DefaultColormapOfScreen (FRAME_X_SCREEN (f)); |
| 4745 | color.pixel = pixel; |
| 4746 | XQueryColor (NULL, cmap, &color); |
| 4747 | rc = x_alloc_nearest_color (f, cmap, &color); |
| 4748 | UNBLOCK_INPUT; |
| 4749 | #endif /* HAVE_X_WINDOWS */ |
| 4750 | |
| 4751 | if (rc) |
| 4752 | { |
| 4753 | ++ct_colors_allocated; |
| 4754 | |
| 4755 | p = (struct ct_color *) xmalloc (sizeof *p); |
| 4756 | p->r = color.red; |
| 4757 | p->g = color.green; |
| 4758 | p->b = color.blue; |
| 4759 | p->pixel = pixel; |
| 4760 | p->next = ct_table[i]; |
| 4761 | ct_table[i] = p; |
| 4762 | } |
| 4763 | else |
| 4764 | return FRAME_FOREGROUND_PIXEL (f); |
| 4765 | } |
| 4766 | return p->pixel; |
| 4767 | } |
| 4768 | |
| 4769 | |
| 4770 | /* Value is a vector of all pixel colors contained in the color table, |
| 4771 | allocated via xmalloc. Set *N to the number of colors. */ |
| 4772 | |
| 4773 | static unsigned long * |
| 4774 | colors_in_color_table (n) |
| 4775 | int *n; |
| 4776 | { |
| 4777 | int i, j; |
| 4778 | struct ct_color *p; |
| 4779 | unsigned long *colors; |
| 4780 | |
| 4781 | if (ct_colors_allocated == 0) |
| 4782 | { |
| 4783 | *n = 0; |
| 4784 | colors = NULL; |
| 4785 | } |
| 4786 | else |
| 4787 | { |
| 4788 | colors = (unsigned long *) xmalloc (ct_colors_allocated |
| 4789 | * sizeof *colors); |
| 4790 | *n = ct_colors_allocated; |
| 4791 | |
| 4792 | for (i = j = 0; i < CT_SIZE; ++i) |
| 4793 | for (p = ct_table[i]; p; p = p->next) |
| 4794 | colors[j++] = p->pixel; |
| 4795 | } |
| 4796 | |
| 4797 | return colors; |
| 4798 | } |
| 4799 | |
| 4800 | #else /* COLOR_TABLE_SUPPORT */ |
| 4801 | |
| 4802 | static unsigned long |
| 4803 | lookup_rgb_color (f, r, g, b) |
| 4804 | struct frame *f; |
| 4805 | int r, g, b; |
| 4806 | { |
| 4807 | unsigned long pixel; |
| 4808 | |
| 4809 | #ifdef MAC_OS |
| 4810 | pixel = RGB_TO_ULONG (r >> 8, g >> 8, b >> 8); |
| 4811 | gamma_correct (f, &pixel); |
| 4812 | #endif /* MAC_OS */ |
| 4813 | |
| 4814 | #ifdef HAVE_NTGUI |
| 4815 | pixel = PALETTERGB (r >> 8, g >> 8, b >> 8); |
| 4816 | #endif /* HAVE_NTGUI */ |
| 4817 | |
| 4818 | return pixel; |
| 4819 | } |
| 4820 | |
| 4821 | static void |
| 4822 | init_color_table () |
| 4823 | { |
| 4824 | } |
| 4825 | #endif /* COLOR_TABLE_SUPPORT */ |
| 4826 | |
| 4827 | \f |
| 4828 | /*********************************************************************** |
| 4829 | Algorithms |
| 4830 | ***********************************************************************/ |
| 4831 | |
| 4832 | static XColor *x_to_xcolors P_ ((struct frame *, struct image *, int)); |
| 4833 | static void x_from_xcolors P_ ((struct frame *, struct image *, XColor *)); |
| 4834 | static void x_detect_edges P_ ((struct frame *, struct image *, int[9], int)); |
| 4835 | |
| 4836 | #ifdef HAVE_NTGUI |
| 4837 | static void XPutPixel (XImagePtr , int, int, COLORREF); |
| 4838 | #endif /* HAVE_NTGUI */ |
| 4839 | |
| 4840 | /* Non-zero means draw a cross on images having `:conversion |
| 4841 | disabled'. */ |
| 4842 | |
| 4843 | int cross_disabled_images; |
| 4844 | |
| 4845 | /* Edge detection matrices for different edge-detection |
| 4846 | strategies. */ |
| 4847 | |
| 4848 | static int emboss_matrix[9] = { |
| 4849 | /* x - 1 x x + 1 */ |
| 4850 | 2, -1, 0, /* y - 1 */ |
| 4851 | -1, 0, 1, /* y */ |
| 4852 | 0, 1, -2 /* y + 1 */ |
| 4853 | }; |
| 4854 | |
| 4855 | static int laplace_matrix[9] = { |
| 4856 | /* x - 1 x x + 1 */ |
| 4857 | 1, 0, 0, /* y - 1 */ |
| 4858 | 0, 0, 0, /* y */ |
| 4859 | 0, 0, -1 /* y + 1 */ |
| 4860 | }; |
| 4861 | |
| 4862 | /* Value is the intensity of the color whose red/green/blue values |
| 4863 | are R, G, and B. */ |
| 4864 | |
| 4865 | #define COLOR_INTENSITY(R, G, B) ((2 * (R) + 3 * (G) + (B)) / 6) |
| 4866 | |
| 4867 | |
| 4868 | /* On frame F, return an array of XColor structures describing image |
| 4869 | IMG->pixmap. Each XColor structure has its pixel color set. RGB_P |
| 4870 | non-zero means also fill the red/green/blue members of the XColor |
| 4871 | structures. Value is a pointer to the array of XColors structures, |
| 4872 | allocated with xmalloc; it must be freed by the caller. */ |
| 4873 | |
| 4874 | static XColor * |
| 4875 | x_to_xcolors (f, img, rgb_p) |
| 4876 | struct frame *f; |
| 4877 | struct image *img; |
| 4878 | int rgb_p; |
| 4879 | { |
| 4880 | int x, y; |
| 4881 | XColor *colors, *p; |
| 4882 | XImagePtr_or_DC ximg; |
| 4883 | #ifdef HAVE_NTGUI |
| 4884 | HDC hdc; |
| 4885 | HGDIOBJ prev; |
| 4886 | #endif /* HAVE_NTGUI */ |
| 4887 | |
| 4888 | colors = (XColor *) xmalloc (img->width * img->height * sizeof *colors); |
| 4889 | |
| 4890 | #ifndef HAVE_NTGUI |
| 4891 | /* Get the X image IMG->pixmap. */ |
| 4892 | ximg = XGetImage (FRAME_X_DISPLAY (f), img->pixmap, |
| 4893 | 0, 0, img->width, img->height, ~0, ZPixmap); |
| 4894 | #else |
| 4895 | /* Load the image into a memory device context. */ |
| 4896 | hdc = get_frame_dc (f); |
| 4897 | ximg = CreateCompatibleDC (hdc); |
| 4898 | release_frame_dc (f, hdc); |
| 4899 | prev = SelectObject (ximg, img->pixmap); |
| 4900 | #endif /* HAVE_NTGUI */ |
| 4901 | |
| 4902 | /* Fill the `pixel' members of the XColor array. I wished there |
| 4903 | were an easy and portable way to circumvent XGetPixel. */ |
| 4904 | p = colors; |
| 4905 | for (y = 0; y < img->height; ++y) |
| 4906 | { |
| 4907 | XColor *row = p; |
| 4908 | |
| 4909 | #ifdef HAVE_X_WINDOWS |
| 4910 | for (x = 0; x < img->width; ++x, ++p) |
| 4911 | p->pixel = XGetPixel (ximg, x, y); |
| 4912 | if (rgb_p) |
| 4913 | x_query_colors (f, row, img->width); |
| 4914 | |
| 4915 | #else |
| 4916 | |
| 4917 | for (x = 0; x < img->width; ++x, ++p) |
| 4918 | { |
| 4919 | /* W32_TODO: palette support needed here? */ |
| 4920 | p->pixel = GET_PIXEL (ximg, x, y); |
| 4921 | if (rgb_p) |
| 4922 | { |
| 4923 | #ifdef MAC_OS |
| 4924 | p->red = RED16_FROM_ULONG (p->pixel); |
| 4925 | p->green = GREEN16_FROM_ULONG (p->pixel); |
| 4926 | p->blue = BLUE16_FROM_ULONG (p->pixel); |
| 4927 | #endif /* MAC_OS */ |
| 4928 | #ifdef HAVE_NTGUI |
| 4929 | p->red = 256 * GetRValue (p->pixel); |
| 4930 | p->green = 256 * GetGValue (p->pixel); |
| 4931 | p->blue = 256 * GetBValue (p->pixel); |
| 4932 | #endif /* HAVE_NTGUI */ |
| 4933 | } |
| 4934 | } |
| 4935 | #endif /* HAVE_X_WINDOWS */ |
| 4936 | } |
| 4937 | |
| 4938 | Destroy_Image (ximg, prev); |
| 4939 | |
| 4940 | return colors; |
| 4941 | } |
| 4942 | |
| 4943 | #ifdef HAVE_NTGUI |
| 4944 | |
| 4945 | /* Put a pixel of COLOR at position X, Y in XIMG. XIMG must have been |
| 4946 | created with CreateDIBSection, with the pointer to the bit values |
| 4947 | stored in ximg->data. */ |
| 4948 | |
| 4949 | static void XPutPixel (ximg, x, y, color) |
| 4950 | XImagePtr ximg; |
| 4951 | int x, y; |
| 4952 | COLORREF color; |
| 4953 | { |
| 4954 | int width = ximg->info.bmiHeader.biWidth; |
| 4955 | int height = ximg->info.bmiHeader.biHeight; |
| 4956 | unsigned char * pixel; |
| 4957 | |
| 4958 | /* True color images. */ |
| 4959 | if (ximg->info.bmiHeader.biBitCount == 24) |
| 4960 | { |
| 4961 | int rowbytes = width * 3; |
| 4962 | /* Ensure scanlines are aligned on 4 byte boundaries. */ |
| 4963 | if (rowbytes % 4) |
| 4964 | rowbytes += 4 - (rowbytes % 4); |
| 4965 | |
| 4966 | pixel = ximg->data + y * rowbytes + x * 3; |
| 4967 | /* Windows bitmaps are in BGR order. */ |
| 4968 | *pixel = GetBValue (color); |
| 4969 | *(pixel + 1) = GetGValue (color); |
| 4970 | *(pixel + 2) = GetRValue (color); |
| 4971 | } |
| 4972 | /* Monochrome images. */ |
| 4973 | else if (ximg->info.bmiHeader.biBitCount == 1) |
| 4974 | { |
| 4975 | int rowbytes = width / 8; |
| 4976 | /* Ensure scanlines are aligned on 4 byte boundaries. */ |
| 4977 | if (rowbytes % 4) |
| 4978 | rowbytes += 4 - (rowbytes % 4); |
| 4979 | pixel = ximg->data + y * rowbytes + x / 8; |
| 4980 | /* Filter out palette info. */ |
| 4981 | if (color & 0x00ffffff) |
| 4982 | *pixel = *pixel | (1 << x % 8); |
| 4983 | else |
| 4984 | *pixel = *pixel & ~(1 << x % 8); |
| 4985 | } |
| 4986 | else |
| 4987 | image_error ("XPutPixel: palette image not supported", Qnil, Qnil); |
| 4988 | } |
| 4989 | |
| 4990 | #endif /* HAVE_NTGUI */ |
| 4991 | |
| 4992 | /* Create IMG->pixmap from an array COLORS of XColor structures, whose |
| 4993 | RGB members are set. F is the frame on which this all happens. |
| 4994 | COLORS will be freed; an existing IMG->pixmap will be freed, too. */ |
| 4995 | |
| 4996 | static void |
| 4997 | x_from_xcolors (f, img, colors) |
| 4998 | struct frame *f; |
| 4999 | struct image *img; |
| 5000 | XColor *colors; |
| 5001 | { |
| 5002 | int x, y; |
| 5003 | XImagePtr oimg; |
| 5004 | Pixmap pixmap; |
| 5005 | XColor *p; |
| 5006 | |
| 5007 | init_color_table (); |
| 5008 | |
| 5009 | x_create_x_image_and_pixmap (f, img->width, img->height, 0, |
| 5010 | &oimg, &pixmap); |
| 5011 | p = colors; |
| 5012 | for (y = 0; y < img->height; ++y) |
| 5013 | for (x = 0; x < img->width; ++x, ++p) |
| 5014 | { |
| 5015 | unsigned long pixel; |
| 5016 | pixel = lookup_rgb_color (f, p->red, p->green, p->blue); |
| 5017 | XPutPixel (oimg, x, y, pixel); |
| 5018 | } |
| 5019 | |
| 5020 | xfree (colors); |
| 5021 | x_clear_image_1 (f, img, 1, 0, 1); |
| 5022 | |
| 5023 | x_put_x_image (f, oimg, pixmap, img->width, img->height); |
| 5024 | x_destroy_x_image (oimg); |
| 5025 | img->pixmap = pixmap; |
| 5026 | #ifdef COLOR_TABLE_SUPPORT |
| 5027 | img->colors = colors_in_color_table (&img->ncolors); |
| 5028 | free_color_table (); |
| 5029 | #endif /* COLOR_TABLE_SUPPORT */ |
| 5030 | } |
| 5031 | |
| 5032 | |
| 5033 | /* On frame F, perform edge-detection on image IMG. |
| 5034 | |
| 5035 | MATRIX is a nine-element array specifying the transformation |
| 5036 | matrix. See emboss_matrix for an example. |
| 5037 | |
| 5038 | COLOR_ADJUST is a color adjustment added to each pixel of the |
| 5039 | outgoing image. */ |
| 5040 | |
| 5041 | static void |
| 5042 | x_detect_edges (f, img, matrix, color_adjust) |
| 5043 | struct frame *f; |
| 5044 | struct image *img; |
| 5045 | int matrix[9], color_adjust; |
| 5046 | { |
| 5047 | XColor *colors = x_to_xcolors (f, img, 1); |
| 5048 | XColor *new, *p; |
| 5049 | int x, y, i, sum; |
| 5050 | |
| 5051 | for (i = sum = 0; i < 9; ++i) |
| 5052 | sum += abs (matrix[i]); |
| 5053 | |
| 5054 | #define COLOR(A, X, Y) ((A) + (Y) * img->width + (X)) |
| 5055 | |
| 5056 | new = (XColor *) xmalloc (img->width * img->height * sizeof *new); |
| 5057 | |
| 5058 | for (y = 0; y < img->height; ++y) |
| 5059 | { |
| 5060 | p = COLOR (new, 0, y); |
| 5061 | p->red = p->green = p->blue = 0xffff/2; |
| 5062 | p = COLOR (new, img->width - 1, y); |
| 5063 | p->red = p->green = p->blue = 0xffff/2; |
| 5064 | } |
| 5065 | |
| 5066 | for (x = 1; x < img->width - 1; ++x) |
| 5067 | { |
| 5068 | p = COLOR (new, x, 0); |
| 5069 | p->red = p->green = p->blue = 0xffff/2; |
| 5070 | p = COLOR (new, x, img->height - 1); |
| 5071 | p->red = p->green = p->blue = 0xffff/2; |
| 5072 | } |
| 5073 | |
| 5074 | for (y = 1; y < img->height - 1; ++y) |
| 5075 | { |
| 5076 | p = COLOR (new, 1, y); |
| 5077 | |
| 5078 | for (x = 1; x < img->width - 1; ++x, ++p) |
| 5079 | { |
| 5080 | int r, g, b, y1, x1; |
| 5081 | |
| 5082 | r = g = b = i = 0; |
| 5083 | for (y1 = y - 1; y1 < y + 2; ++y1) |
| 5084 | for (x1 = x - 1; x1 < x + 2; ++x1, ++i) |
| 5085 | if (matrix[i]) |
| 5086 | { |
| 5087 | XColor *t = COLOR (colors, x1, y1); |
| 5088 | r += matrix[i] * t->red; |
| 5089 | g += matrix[i] * t->green; |
| 5090 | b += matrix[i] * t->blue; |
| 5091 | } |
| 5092 | |
| 5093 | r = (r / sum + color_adjust) & 0xffff; |
| 5094 | g = (g / sum + color_adjust) & 0xffff; |
| 5095 | b = (b / sum + color_adjust) & 0xffff; |
| 5096 | p->red = p->green = p->blue = COLOR_INTENSITY (r, g, b); |
| 5097 | } |
| 5098 | } |
| 5099 | |
| 5100 | xfree (colors); |
| 5101 | x_from_xcolors (f, img, new); |
| 5102 | |
| 5103 | #undef COLOR |
| 5104 | } |
| 5105 | |
| 5106 | |
| 5107 | /* Perform the pre-defined `emboss' edge-detection on image IMG |
| 5108 | on frame F. */ |
| 5109 | |
| 5110 | static void |
| 5111 | x_emboss (f, img) |
| 5112 | struct frame *f; |
| 5113 | struct image *img; |
| 5114 | { |
| 5115 | x_detect_edges (f, img, emboss_matrix, 0xffff / 2); |
| 5116 | } |
| 5117 | |
| 5118 | |
| 5119 | /* Transform image IMG which is used on frame F with a Laplace |
| 5120 | edge-detection algorithm. The result is an image that can be used |
| 5121 | to draw disabled buttons, for example. */ |
| 5122 | |
| 5123 | static void |
| 5124 | x_laplace (f, img) |
| 5125 | struct frame *f; |
| 5126 | struct image *img; |
| 5127 | { |
| 5128 | x_detect_edges (f, img, laplace_matrix, 45000); |
| 5129 | } |
| 5130 | |
| 5131 | |
| 5132 | /* Perform edge-detection on image IMG on frame F, with specified |
| 5133 | transformation matrix MATRIX and color-adjustment COLOR_ADJUST. |
| 5134 | |
| 5135 | MATRIX must be either |
| 5136 | |
| 5137 | - a list of at least 9 numbers in row-major form |
| 5138 | - a vector of at least 9 numbers |
| 5139 | |
| 5140 | COLOR_ADJUST nil means use a default; otherwise it must be a |
| 5141 | number. */ |
| 5142 | |
| 5143 | static void |
| 5144 | x_edge_detection (f, img, matrix, color_adjust) |
| 5145 | struct frame *f; |
| 5146 | struct image *img; |
| 5147 | Lisp_Object matrix, color_adjust; |
| 5148 | { |
| 5149 | int i = 0; |
| 5150 | int trans[9]; |
| 5151 | |
| 5152 | if (CONSP (matrix)) |
| 5153 | { |
| 5154 | for (i = 0; |
| 5155 | i < 9 && CONSP (matrix) && NUMBERP (XCAR (matrix)); |
| 5156 | ++i, matrix = XCDR (matrix)) |
| 5157 | trans[i] = XFLOATINT (XCAR (matrix)); |
| 5158 | } |
| 5159 | else if (VECTORP (matrix) && ASIZE (matrix) >= 9) |
| 5160 | { |
| 5161 | for (i = 0; i < 9 && NUMBERP (AREF (matrix, i)); ++i) |
| 5162 | trans[i] = XFLOATINT (AREF (matrix, i)); |
| 5163 | } |
| 5164 | |
| 5165 | if (NILP (color_adjust)) |
| 5166 | color_adjust = make_number (0xffff / 2); |
| 5167 | |
| 5168 | if (i == 9 && NUMBERP (color_adjust)) |
| 5169 | x_detect_edges (f, img, trans, (int) XFLOATINT (color_adjust)); |
| 5170 | } |
| 5171 | |
| 5172 | |
| 5173 | /* Transform image IMG on frame F so that it looks disabled. */ |
| 5174 | |
| 5175 | static void |
| 5176 | x_disable_image (f, img) |
| 5177 | struct frame *f; |
| 5178 | struct image *img; |
| 5179 | { |
| 5180 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); |
| 5181 | #ifdef HAVE_NTGUI |
| 5182 | int n_planes = dpyinfo->n_planes * dpyinfo->n_cbits; |
| 5183 | #else |
| 5184 | int n_planes = dpyinfo->n_planes; |
| 5185 | #endif /* HAVE_NTGUI */ |
| 5186 | |
| 5187 | if (n_planes >= 2) |
| 5188 | { |
| 5189 | /* Color (or grayscale). Convert to gray, and equalize. Just |
| 5190 | drawing such images with a stipple can look very odd, so |
| 5191 | we're using this method instead. */ |
| 5192 | XColor *colors = x_to_xcolors (f, img, 1); |
| 5193 | XColor *p, *end; |
| 5194 | const int h = 15000; |
| 5195 | const int l = 30000; |
| 5196 | |
| 5197 | for (p = colors, end = colors + img->width * img->height; |
| 5198 | p < end; |
| 5199 | ++p) |
| 5200 | { |
| 5201 | int i = COLOR_INTENSITY (p->red, p->green, p->blue); |
| 5202 | int i2 = (0xffff - h - l) * i / 0xffff + l; |
| 5203 | p->red = p->green = p->blue = i2; |
| 5204 | } |
| 5205 | |
| 5206 | x_from_xcolors (f, img, colors); |
| 5207 | } |
| 5208 | |
| 5209 | /* Draw a cross over the disabled image, if we must or if we |
| 5210 | should. */ |
| 5211 | if (n_planes < 2 || cross_disabled_images) |
| 5212 | { |
| 5213 | #ifndef HAVE_NTGUI |
| 5214 | Display *dpy = FRAME_X_DISPLAY (f); |
| 5215 | GC gc; |
| 5216 | |
| 5217 | #ifdef MAC_OS |
| 5218 | #define XCreateGC_pixmap(dpy, pixmap) XCreateGC (dpy, NULL, 0, NULL) |
| 5219 | #define MaskForeground(f) PIX_MASK_DRAW |
| 5220 | #else |
| 5221 | #define XCreateGC_pixmap(dpy, pixmap) XCreateGC (dpy, pixmap, 0, NULL) |
| 5222 | #define MaskForeground(f) WHITE_PIX_DEFAULT (f) |
| 5223 | #endif |
| 5224 | |
| 5225 | gc = XCreateGC_pixmap (dpy, img->pixmap); |
| 5226 | XSetForeground (dpy, gc, BLACK_PIX_DEFAULT (f)); |
| 5227 | XDrawLine (dpy, img->pixmap, gc, 0, 0, |
| 5228 | img->width - 1, img->height - 1); |
| 5229 | XDrawLine (dpy, img->pixmap, gc, 0, img->height - 1, |
| 5230 | img->width - 1, 0); |
| 5231 | XFreeGC (dpy, gc); |
| 5232 | |
| 5233 | if (img->mask) |
| 5234 | { |
| 5235 | gc = XCreateGC_pixmap (dpy, img->mask); |
| 5236 | XSetForeground (dpy, gc, MaskForeground (f)); |
| 5237 | XDrawLine (dpy, img->mask, gc, 0, 0, |
| 5238 | img->width - 1, img->height - 1); |
| 5239 | XDrawLine (dpy, img->mask, gc, 0, img->height - 1, |
| 5240 | img->width - 1, 0); |
| 5241 | XFreeGC (dpy, gc); |
| 5242 | } |
| 5243 | #else |
| 5244 | HDC hdc, bmpdc; |
| 5245 | HGDIOBJ prev; |
| 5246 | |
| 5247 | hdc = get_frame_dc (f); |
| 5248 | bmpdc = CreateCompatibleDC (hdc); |
| 5249 | release_frame_dc (f, hdc); |
| 5250 | |
| 5251 | prev = SelectObject (bmpdc, img->pixmap); |
| 5252 | |
| 5253 | SetTextColor (bmpdc, BLACK_PIX_DEFAULT (f)); |
| 5254 | MoveToEx (bmpdc, 0, 0, NULL); |
| 5255 | LineTo (bmpdc, img->width - 1, img->height - 1); |
| 5256 | MoveToEx (bmpdc, 0, img->height - 1, NULL); |
| 5257 | LineTo (bmpdc, img->width - 1, 0); |
| 5258 | |
| 5259 | if (img->mask) |
| 5260 | { |
| 5261 | SelectObject (bmpdc, img->mask); |
| 5262 | SetTextColor (bmpdc, WHITE_PIX_DEFAULT (f)); |
| 5263 | MoveToEx (bmpdc, 0, 0, NULL); |
| 5264 | LineTo (bmpdc, img->width - 1, img->height - 1); |
| 5265 | MoveToEx (bmpdc, 0, img->height - 1, NULL); |
| 5266 | LineTo (bmpdc, img->width - 1, 0); |
| 5267 | } |
| 5268 | SelectObject (bmpdc, prev); |
| 5269 | DeleteDC (bmpdc); |
| 5270 | #endif /* HAVE_NTGUI */ |
| 5271 | } |
| 5272 | } |
| 5273 | |
| 5274 | |
| 5275 | /* Build a mask for image IMG which is used on frame F. FILE is the |
| 5276 | name of an image file, for error messages. HOW determines how to |
| 5277 | determine the background color of IMG. If it is a list '(R G B)', |
| 5278 | with R, G, and B being integers >= 0, take that as the color of the |
| 5279 | background. Otherwise, determine the background color of IMG |
| 5280 | heuristically. Value is non-zero if successful. */ |
| 5281 | |
| 5282 | static int |
| 5283 | x_build_heuristic_mask (f, img, how) |
| 5284 | struct frame *f; |
| 5285 | struct image *img; |
| 5286 | Lisp_Object how; |
| 5287 | { |
| 5288 | XImagePtr_or_DC ximg; |
| 5289 | #ifndef HAVE_NTGUI |
| 5290 | XImagePtr mask_img; |
| 5291 | #else |
| 5292 | HDC frame_dc; |
| 5293 | HGDIOBJ prev; |
| 5294 | char *mask_img; |
| 5295 | int row_width; |
| 5296 | #endif /* HAVE_NTGUI */ |
| 5297 | int x, y, rc, use_img_background; |
| 5298 | unsigned long bg = 0; |
| 5299 | |
| 5300 | if (img->mask) |
| 5301 | { |
| 5302 | Free_Pixmap (FRAME_X_DISPLAY (f), img->mask); |
| 5303 | img->mask = NO_PIXMAP; |
| 5304 | img->background_transparent_valid = 0; |
| 5305 | } |
| 5306 | |
| 5307 | #ifndef HAVE_NTGUI |
| 5308 | /* Create an image and pixmap serving as mask. */ |
| 5309 | rc = x_create_x_image_and_pixmap (f, img->width, img->height, 1, |
| 5310 | &mask_img, &img->mask); |
| 5311 | if (!rc) |
| 5312 | return 0; |
| 5313 | |
| 5314 | /* Get the X image of IMG->pixmap. */ |
| 5315 | ximg = XGetImage (FRAME_X_DISPLAY (f), img->pixmap, 0, 0, |
| 5316 | img->width, img->height, |
| 5317 | ~0, ZPixmap); |
| 5318 | #else |
| 5319 | /* Create the bit array serving as mask. */ |
| 5320 | row_width = (img->width + 7) / 8; |
| 5321 | mask_img = xmalloc (row_width * img->height); |
| 5322 | bzero (mask_img, row_width * img->height); |
| 5323 | |
| 5324 | /* Create a memory device context for IMG->pixmap. */ |
| 5325 | frame_dc = get_frame_dc (f); |
| 5326 | ximg = CreateCompatibleDC (frame_dc); |
| 5327 | release_frame_dc (f, frame_dc); |
| 5328 | prev = SelectObject (ximg, img->pixmap); |
| 5329 | #endif /* HAVE_NTGUI */ |
| 5330 | |
| 5331 | /* Determine the background color of ximg. If HOW is `(R G B)' |
| 5332 | take that as color. Otherwise, use the image's background color. */ |
| 5333 | use_img_background = 1; |
| 5334 | |
| 5335 | if (CONSP (how)) |
| 5336 | { |
| 5337 | int rgb[3], i; |
| 5338 | |
| 5339 | for (i = 0; i < 3 && CONSP (how) && NATNUMP (XCAR (how)); ++i) |
| 5340 | { |
| 5341 | rgb[i] = XFASTINT (XCAR (how)) & 0xffff; |
| 5342 | how = XCDR (how); |
| 5343 | } |
| 5344 | |
| 5345 | if (i == 3 && NILP (how)) |
| 5346 | { |
| 5347 | char color_name[30]; |
| 5348 | sprintf (color_name, "#%04x%04x%04x", rgb[0], rgb[1], rgb[2]); |
| 5349 | bg = ( |
| 5350 | #ifdef HAVE_NTGUI |
| 5351 | 0x00ffffff & /* Filter out palette info. */ |
| 5352 | #endif /* HAVE_NTGUI */ |
| 5353 | x_alloc_image_color (f, img, build_string (color_name), 0)); |
| 5354 | use_img_background = 0; |
| 5355 | } |
| 5356 | } |
| 5357 | |
| 5358 | if (use_img_background) |
| 5359 | bg = four_corners_best (ximg, img->width, img->height); |
| 5360 | |
| 5361 | /* Set all bits in mask_img to 1 whose color in ximg is different |
| 5362 | from the background color bg. */ |
| 5363 | #ifndef HAVE_NTGUI |
| 5364 | for (y = 0; y < img->height; ++y) |
| 5365 | for (x = 0; x < img->width; ++x) |
| 5366 | XPutPixel (mask_img, x, y, (XGetPixel (ximg, x, y) != bg |
| 5367 | ? PIX_MASK_DRAW : PIX_MASK_RETAIN)); |
| 5368 | |
| 5369 | /* Fill in the background_transparent field while we have the mask handy. */ |
| 5370 | image_background_transparent (img, f, mask_img); |
| 5371 | |
| 5372 | /* Put mask_img into img->mask. */ |
| 5373 | x_put_x_image (f, mask_img, img->mask, img->width, img->height); |
| 5374 | x_destroy_x_image (mask_img); |
| 5375 | |
| 5376 | #else |
| 5377 | for (y = 0; y < img->height; ++y) |
| 5378 | for (x = 0; x < img->width; ++x) |
| 5379 | { |
| 5380 | COLORREF p = GetPixel (ximg, x, y); |
| 5381 | if (p != bg) |
| 5382 | mask_img[y * row_width + x / 8] |= 1 << (x % 8); |
| 5383 | } |
| 5384 | |
| 5385 | /* Create the mask image. */ |
| 5386 | img->mask = w32_create_pixmap_from_bitmap_data (img->width, img->height, |
| 5387 | mask_img); |
| 5388 | /* Fill in the background_transparent field while we have the mask handy. */ |
| 5389 | SelectObject (ximg, img->mask); |
| 5390 | image_background_transparent (img, f, ximg); |
| 5391 | |
| 5392 | /* Was: x_destroy_x_image ((XImagePtr )mask_img); which seems bogus ++kfs */ |
| 5393 | xfree (mask_img); |
| 5394 | #endif /* HAVE_NTGUI */ |
| 5395 | |
| 5396 | Destroy_Image (ximg, prev); |
| 5397 | |
| 5398 | return 1; |
| 5399 | } |
| 5400 | |
| 5401 | \f |
| 5402 | /*********************************************************************** |
| 5403 | PBM (mono, gray, color) |
| 5404 | ***********************************************************************/ |
| 5405 | |
| 5406 | static int pbm_image_p P_ ((Lisp_Object object)); |
| 5407 | static int pbm_load P_ ((struct frame *f, struct image *img)); |
| 5408 | static int pbm_scan_number P_ ((unsigned char **, unsigned char *)); |
| 5409 | |
| 5410 | /* The symbol `pbm' identifying images of this type. */ |
| 5411 | |
| 5412 | Lisp_Object Qpbm; |
| 5413 | |
| 5414 | /* Indices of image specification fields in gs_format, below. */ |
| 5415 | |
| 5416 | enum pbm_keyword_index |
| 5417 | { |
| 5418 | PBM_TYPE, |
| 5419 | PBM_FILE, |
| 5420 | PBM_DATA, |
| 5421 | PBM_ASCENT, |
| 5422 | PBM_MARGIN, |
| 5423 | PBM_RELIEF, |
| 5424 | PBM_ALGORITHM, |
| 5425 | PBM_HEURISTIC_MASK, |
| 5426 | PBM_MASK, |
| 5427 | PBM_FOREGROUND, |
| 5428 | PBM_BACKGROUND, |
| 5429 | PBM_LAST |
| 5430 | }; |
| 5431 | |
| 5432 | /* Vector of image_keyword structures describing the format |
| 5433 | of valid user-defined image specifications. */ |
| 5434 | |
| 5435 | static struct image_keyword pbm_format[PBM_LAST] = |
| 5436 | { |
| 5437 | {":type", IMAGE_SYMBOL_VALUE, 1}, |
| 5438 | {":file", IMAGE_STRING_VALUE, 0}, |
| 5439 | {":data", IMAGE_STRING_VALUE, 0}, |
| 5440 | {":ascent", IMAGE_ASCENT_VALUE, 0}, |
| 5441 | {":margin", IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR, 0}, |
| 5442 | {":relief", IMAGE_INTEGER_VALUE, 0}, |
| 5443 | {":conversion", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, |
| 5444 | {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, |
| 5445 | {":mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, |
| 5446 | {":foreground", IMAGE_STRING_OR_NIL_VALUE, 0}, |
| 5447 | {":background", IMAGE_STRING_OR_NIL_VALUE, 0} |
| 5448 | }; |
| 5449 | |
| 5450 | /* Structure describing the image type `pbm'. */ |
| 5451 | |
| 5452 | static struct image_type pbm_type = |
| 5453 | { |
| 5454 | &Qpbm, |
| 5455 | pbm_image_p, |
| 5456 | pbm_load, |
| 5457 | x_clear_image, |
| 5458 | NULL |
| 5459 | }; |
| 5460 | |
| 5461 | |
| 5462 | /* Return non-zero if OBJECT is a valid PBM image specification. */ |
| 5463 | |
| 5464 | static int |
| 5465 | pbm_image_p (object) |
| 5466 | Lisp_Object object; |
| 5467 | { |
| 5468 | struct image_keyword fmt[PBM_LAST]; |
| 5469 | |
| 5470 | bcopy (pbm_format, fmt, sizeof fmt); |
| 5471 | |
| 5472 | if (!parse_image_spec (object, fmt, PBM_LAST, Qpbm)) |
| 5473 | return 0; |
| 5474 | |
| 5475 | /* Must specify either :data or :file. */ |
| 5476 | return fmt[PBM_DATA].count + fmt[PBM_FILE].count == 1; |
| 5477 | } |
| 5478 | |
| 5479 | |
| 5480 | /* Scan a decimal number from *S and return it. Advance *S while |
| 5481 | reading the number. END is the end of the string. Value is -1 at |
| 5482 | end of input. */ |
| 5483 | |
| 5484 | static int |
| 5485 | pbm_scan_number (s, end) |
| 5486 | unsigned char **s, *end; |
| 5487 | { |
| 5488 | int c = 0, val = -1; |
| 5489 | |
| 5490 | while (*s < end) |
| 5491 | { |
| 5492 | /* Skip white-space. */ |
| 5493 | while (*s < end && (c = *(*s)++, isspace (c))) |
| 5494 | ; |
| 5495 | |
| 5496 | if (c == '#') |
| 5497 | { |
| 5498 | /* Skip comment to end of line. */ |
| 5499 | while (*s < end && (c = *(*s)++, c != '\n')) |
| 5500 | ; |
| 5501 | } |
| 5502 | else if (isdigit (c)) |
| 5503 | { |
| 5504 | /* Read decimal number. */ |
| 5505 | val = c - '0'; |
| 5506 | while (*s < end && (c = *(*s)++, isdigit (c))) |
| 5507 | val = 10 * val + c - '0'; |
| 5508 | break; |
| 5509 | } |
| 5510 | else |
| 5511 | break; |
| 5512 | } |
| 5513 | |
| 5514 | return val; |
| 5515 | } |
| 5516 | |
| 5517 | |
| 5518 | #ifdef HAVE_NTGUI |
| 5519 | #if 0 /* Unused. ++kfs */ |
| 5520 | |
| 5521 | /* Read FILE into memory. Value is a pointer to a buffer allocated |
| 5522 | with xmalloc holding FILE's contents. Value is null if an error |
| 5523 | occurred. *SIZE is set to the size of the file. */ |
| 5524 | |
| 5525 | static char * |
| 5526 | pbm_read_file (file, size) |
| 5527 | Lisp_Object file; |
| 5528 | int *size; |
| 5529 | { |
| 5530 | FILE *fp = NULL; |
| 5531 | char *buf = NULL; |
| 5532 | struct stat st; |
| 5533 | |
| 5534 | if (stat (SDATA (file), &st) == 0 |
| 5535 | && (fp = fopen (SDATA (file), "rb")) != NULL |
| 5536 | && (buf = (char *) xmalloc (st.st_size), |
| 5537 | fread (buf, 1, st.st_size, fp) == st.st_size)) |
| 5538 | { |
| 5539 | *size = st.st_size; |
| 5540 | fclose (fp); |
| 5541 | } |
| 5542 | else |
| 5543 | { |
| 5544 | if (fp) |
| 5545 | fclose (fp); |
| 5546 | if (buf) |
| 5547 | { |
| 5548 | xfree (buf); |
| 5549 | buf = NULL; |
| 5550 | } |
| 5551 | } |
| 5552 | |
| 5553 | return buf; |
| 5554 | } |
| 5555 | #endif |
| 5556 | #endif /* HAVE_NTGUI */ |
| 5557 | |
| 5558 | /* Load PBM image IMG for use on frame F. */ |
| 5559 | |
| 5560 | static int |
| 5561 | pbm_load (f, img) |
| 5562 | struct frame *f; |
| 5563 | struct image *img; |
| 5564 | { |
| 5565 | int raw_p, x, y; |
| 5566 | int width, height, max_color_idx = 0; |
| 5567 | XImagePtr ximg; |
| 5568 | Lisp_Object file, specified_file; |
| 5569 | enum {PBM_MONO, PBM_GRAY, PBM_COLOR} type; |
| 5570 | struct gcpro gcpro1; |
| 5571 | unsigned char *contents = NULL; |
| 5572 | unsigned char *end, *p; |
| 5573 | int size; |
| 5574 | |
| 5575 | specified_file = image_spec_value (img->spec, QCfile, NULL); |
| 5576 | file = Qnil; |
| 5577 | GCPRO1 (file); |
| 5578 | |
| 5579 | if (STRINGP (specified_file)) |
| 5580 | { |
| 5581 | file = x_find_image_file (specified_file); |
| 5582 | if (!STRINGP (file)) |
| 5583 | { |
| 5584 | image_error ("Cannot find image file `%s'", specified_file, Qnil); |
| 5585 | UNGCPRO; |
| 5586 | return 0; |
| 5587 | } |
| 5588 | |
| 5589 | contents = slurp_file (SDATA (file), &size); |
| 5590 | if (contents == NULL) |
| 5591 | { |
| 5592 | image_error ("Error reading `%s'", file, Qnil); |
| 5593 | UNGCPRO; |
| 5594 | return 0; |
| 5595 | } |
| 5596 | |
| 5597 | p = contents; |
| 5598 | end = contents + size; |
| 5599 | } |
| 5600 | else |
| 5601 | { |
| 5602 | Lisp_Object data; |
| 5603 | data = image_spec_value (img->spec, QCdata, NULL); |
| 5604 | p = SDATA (data); |
| 5605 | end = p + SBYTES (data); |
| 5606 | } |
| 5607 | |
| 5608 | /* Check magic number. */ |
| 5609 | if (end - p < 2 || *p++ != 'P') |
| 5610 | { |
| 5611 | image_error ("Not a PBM image: `%s'", img->spec, Qnil); |
| 5612 | error: |
| 5613 | xfree (contents); |
| 5614 | UNGCPRO; |
| 5615 | return 0; |
| 5616 | } |
| 5617 | |
| 5618 | switch (*p++) |
| 5619 | { |
| 5620 | case '1': |
| 5621 | raw_p = 0, type = PBM_MONO; |
| 5622 | break; |
| 5623 | |
| 5624 | case '2': |
| 5625 | raw_p = 0, type = PBM_GRAY; |
| 5626 | break; |
| 5627 | |
| 5628 | case '3': |
| 5629 | raw_p = 0, type = PBM_COLOR; |
| 5630 | break; |
| 5631 | |
| 5632 | case '4': |
| 5633 | raw_p = 1, type = PBM_MONO; |
| 5634 | break; |
| 5635 | |
| 5636 | case '5': |
| 5637 | raw_p = 1, type = PBM_GRAY; |
| 5638 | break; |
| 5639 | |
| 5640 | case '6': |
| 5641 | raw_p = 1, type = PBM_COLOR; |
| 5642 | break; |
| 5643 | |
| 5644 | default: |
| 5645 | image_error ("Not a PBM image: `%s'", img->spec, Qnil); |
| 5646 | goto error; |
| 5647 | } |
| 5648 | |
| 5649 | /* Read width, height, maximum color-component. Characters |
| 5650 | starting with `#' up to the end of a line are ignored. */ |
| 5651 | width = pbm_scan_number (&p, end); |
| 5652 | height = pbm_scan_number (&p, end); |
| 5653 | |
| 5654 | if (type != PBM_MONO) |
| 5655 | { |
| 5656 | max_color_idx = pbm_scan_number (&p, end); |
| 5657 | if (raw_p && max_color_idx > 255) |
| 5658 | max_color_idx = 255; |
| 5659 | } |
| 5660 | |
| 5661 | if (!check_image_size (f, width, height) |
| 5662 | || (type != PBM_MONO && max_color_idx < 0)) |
| 5663 | goto error; |
| 5664 | |
| 5665 | if (!x_create_x_image_and_pixmap (f, width, height, 0, |
| 5666 | &ximg, &img->pixmap)) |
| 5667 | goto error; |
| 5668 | |
| 5669 | /* Initialize the color hash table. */ |
| 5670 | init_color_table (); |
| 5671 | |
| 5672 | if (type == PBM_MONO) |
| 5673 | { |
| 5674 | int c = 0, g; |
| 5675 | struct image_keyword fmt[PBM_LAST]; |
| 5676 | unsigned long fg = FRAME_FOREGROUND_PIXEL (f); |
| 5677 | unsigned long bg = FRAME_BACKGROUND_PIXEL (f); |
| 5678 | |
| 5679 | /* Parse the image specification. */ |
| 5680 | bcopy (pbm_format, fmt, sizeof fmt); |
| 5681 | parse_image_spec (img->spec, fmt, PBM_LAST, Qpbm); |
| 5682 | |
| 5683 | /* Get foreground and background colors, maybe allocate colors. */ |
| 5684 | if (fmt[PBM_FOREGROUND].count |
| 5685 | && STRINGP (fmt[PBM_FOREGROUND].value)) |
| 5686 | fg = x_alloc_image_color (f, img, fmt[PBM_FOREGROUND].value, fg); |
| 5687 | if (fmt[PBM_BACKGROUND].count |
| 5688 | && STRINGP (fmt[PBM_BACKGROUND].value)) |
| 5689 | { |
| 5690 | bg = x_alloc_image_color (f, img, fmt[PBM_BACKGROUND].value, bg); |
| 5691 | img->background = bg; |
| 5692 | img->background_valid = 1; |
| 5693 | } |
| 5694 | |
| 5695 | for (y = 0; y < height; ++y) |
| 5696 | for (x = 0; x < width; ++x) |
| 5697 | { |
| 5698 | if (raw_p) |
| 5699 | { |
| 5700 | if ((x & 7) == 0) |
| 5701 | c = *p++; |
| 5702 | g = c & 0x80; |
| 5703 | c <<= 1; |
| 5704 | } |
| 5705 | else |
| 5706 | g = pbm_scan_number (&p, end); |
| 5707 | |
| 5708 | XPutPixel (ximg, x, y, g ? fg : bg); |
| 5709 | } |
| 5710 | } |
| 5711 | else |
| 5712 | { |
| 5713 | for (y = 0; y < height; ++y) |
| 5714 | for (x = 0; x < width; ++x) |
| 5715 | { |
| 5716 | int r, g, b; |
| 5717 | |
| 5718 | if (type == PBM_GRAY) |
| 5719 | r = g = b = raw_p ? *p++ : pbm_scan_number (&p, end); |
| 5720 | else if (raw_p) |
| 5721 | { |
| 5722 | r = *p++; |
| 5723 | g = *p++; |
| 5724 | b = *p++; |
| 5725 | } |
| 5726 | else |
| 5727 | { |
| 5728 | r = pbm_scan_number (&p, end); |
| 5729 | g = pbm_scan_number (&p, end); |
| 5730 | b = pbm_scan_number (&p, end); |
| 5731 | } |
| 5732 | |
| 5733 | if (r < 0 || g < 0 || b < 0) |
| 5734 | { |
| 5735 | x_destroy_x_image (ximg); |
| 5736 | image_error ("Invalid pixel value in image `%s'", |
| 5737 | img->spec, Qnil); |
| 5738 | goto error; |
| 5739 | } |
| 5740 | |
| 5741 | /* RGB values are now in the range 0..max_color_idx. |
| 5742 | Scale this to the range 0..0xffff supported by X. */ |
| 5743 | r = (double) r * 65535 / max_color_idx; |
| 5744 | g = (double) g * 65535 / max_color_idx; |
| 5745 | b = (double) b * 65535 / max_color_idx; |
| 5746 | XPutPixel (ximg, x, y, lookup_rgb_color (f, r, g, b)); |
| 5747 | } |
| 5748 | } |
| 5749 | |
| 5750 | #ifdef COLOR_TABLE_SUPPORT |
| 5751 | /* Store in IMG->colors the colors allocated for the image, and |
| 5752 | free the color table. */ |
| 5753 | img->colors = colors_in_color_table (&img->ncolors); |
| 5754 | free_color_table (); |
| 5755 | #endif /* COLOR_TABLE_SUPPORT */ |
| 5756 | |
| 5757 | img->width = width; |
| 5758 | img->height = height; |
| 5759 | |
| 5760 | /* Maybe fill in the background field while we have ximg handy. */ |
| 5761 | |
| 5762 | if (NILP (image_spec_value (img->spec, QCbackground, NULL))) |
| 5763 | /* Casting avoids a GCC warning. */ |
| 5764 | IMAGE_BACKGROUND (img, f, (XImagePtr_or_DC)ximg); |
| 5765 | |
| 5766 | /* Put the image into a pixmap. */ |
| 5767 | x_put_x_image (f, ximg, img->pixmap, width, height); |
| 5768 | x_destroy_x_image (ximg); |
| 5769 | |
| 5770 | /* X and W32 versions did it here, MAC version above. ++kfs |
| 5771 | img->width = width; |
| 5772 | img->height = height; */ |
| 5773 | |
| 5774 | UNGCPRO; |
| 5775 | xfree (contents); |
| 5776 | return 1; |
| 5777 | } |
| 5778 | |
| 5779 | \f |
| 5780 | /*********************************************************************** |
| 5781 | PNG |
| 5782 | ***********************************************************************/ |
| 5783 | |
| 5784 | #if defined (HAVE_PNG) || defined (MAC_OS) |
| 5785 | |
| 5786 | /* Function prototypes. */ |
| 5787 | |
| 5788 | static int png_image_p P_ ((Lisp_Object object)); |
| 5789 | static int png_load P_ ((struct frame *f, struct image *img)); |
| 5790 | |
| 5791 | /* The symbol `png' identifying images of this type. */ |
| 5792 | |
| 5793 | Lisp_Object Qpng; |
| 5794 | |
| 5795 | /* Indices of image specification fields in png_format, below. */ |
| 5796 | |
| 5797 | enum png_keyword_index |
| 5798 | { |
| 5799 | PNG_TYPE, |
| 5800 | PNG_DATA, |
| 5801 | PNG_FILE, |
| 5802 | PNG_ASCENT, |
| 5803 | PNG_MARGIN, |
| 5804 | PNG_RELIEF, |
| 5805 | PNG_ALGORITHM, |
| 5806 | PNG_HEURISTIC_MASK, |
| 5807 | PNG_MASK, |
| 5808 | PNG_BACKGROUND, |
| 5809 | PNG_LAST |
| 5810 | }; |
| 5811 | |
| 5812 | /* Vector of image_keyword structures describing the format |
| 5813 | of valid user-defined image specifications. */ |
| 5814 | |
| 5815 | static struct image_keyword png_format[PNG_LAST] = |
| 5816 | { |
| 5817 | {":type", IMAGE_SYMBOL_VALUE, 1}, |
| 5818 | {":data", IMAGE_STRING_VALUE, 0}, |
| 5819 | {":file", IMAGE_STRING_VALUE, 0}, |
| 5820 | {":ascent", IMAGE_ASCENT_VALUE, 0}, |
| 5821 | {":margin", IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR, 0}, |
| 5822 | {":relief", IMAGE_INTEGER_VALUE, 0}, |
| 5823 | {":conversion", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, |
| 5824 | {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, |
| 5825 | {":mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, |
| 5826 | {":background", IMAGE_STRING_OR_NIL_VALUE, 0} |
| 5827 | }; |
| 5828 | |
| 5829 | /* Structure describing the image type `png'. */ |
| 5830 | |
| 5831 | static struct image_type png_type = |
| 5832 | { |
| 5833 | &Qpng, |
| 5834 | png_image_p, |
| 5835 | png_load, |
| 5836 | x_clear_image, |
| 5837 | NULL |
| 5838 | }; |
| 5839 | |
| 5840 | /* Return non-zero if OBJECT is a valid PNG image specification. */ |
| 5841 | |
| 5842 | static int |
| 5843 | png_image_p (object) |
| 5844 | Lisp_Object object; |
| 5845 | { |
| 5846 | struct image_keyword fmt[PNG_LAST]; |
| 5847 | bcopy (png_format, fmt, sizeof fmt); |
| 5848 | |
| 5849 | if (!parse_image_spec (object, fmt, PNG_LAST, Qpng)) |
| 5850 | return 0; |
| 5851 | |
| 5852 | /* Must specify either the :data or :file keyword. */ |
| 5853 | return fmt[PNG_FILE].count + fmt[PNG_DATA].count == 1; |
| 5854 | } |
| 5855 | |
| 5856 | #endif /* HAVE_PNG || MAC_OS */ |
| 5857 | |
| 5858 | |
| 5859 | #ifdef HAVE_PNG |
| 5860 | |
| 5861 | #if defined HAVE_LIBPNG_PNG_H |
| 5862 | # include <libpng/png.h> |
| 5863 | #else |
| 5864 | # include <png.h> |
| 5865 | #endif |
| 5866 | |
| 5867 | #ifdef HAVE_NTGUI |
| 5868 | /* PNG library details. */ |
| 5869 | |
| 5870 | DEF_IMGLIB_FN (png_get_io_ptr); |
| 5871 | DEF_IMGLIB_FN (png_check_sig); |
| 5872 | DEF_IMGLIB_FN (png_create_read_struct); |
| 5873 | DEF_IMGLIB_FN (png_create_info_struct); |
| 5874 | DEF_IMGLIB_FN (png_destroy_read_struct); |
| 5875 | DEF_IMGLIB_FN (png_set_read_fn); |
| 5876 | DEF_IMGLIB_FN (png_set_sig_bytes); |
| 5877 | DEF_IMGLIB_FN (png_read_info); |
| 5878 | DEF_IMGLIB_FN (png_get_IHDR); |
| 5879 | DEF_IMGLIB_FN (png_get_valid); |
| 5880 | DEF_IMGLIB_FN (png_set_strip_16); |
| 5881 | DEF_IMGLIB_FN (png_set_expand); |
| 5882 | DEF_IMGLIB_FN (png_set_gray_to_rgb); |
| 5883 | DEF_IMGLIB_FN (png_set_background); |
| 5884 | DEF_IMGLIB_FN (png_get_bKGD); |
| 5885 | DEF_IMGLIB_FN (png_read_update_info); |
| 5886 | DEF_IMGLIB_FN (png_get_channels); |
| 5887 | DEF_IMGLIB_FN (png_get_rowbytes); |
| 5888 | DEF_IMGLIB_FN (png_read_image); |
| 5889 | DEF_IMGLIB_FN (png_read_end); |
| 5890 | DEF_IMGLIB_FN (png_error); |
| 5891 | |
| 5892 | static int |
| 5893 | init_png_functions (Lisp_Object libraries) |
| 5894 | { |
| 5895 | HMODULE library; |
| 5896 | |
| 5897 | /* Try loading libpng under probable names. */ |
| 5898 | if (!(library = w32_delayed_load (libraries, Qpng))) |
| 5899 | return 0; |
| 5900 | |
| 5901 | LOAD_IMGLIB_FN (library, png_get_io_ptr); |
| 5902 | LOAD_IMGLIB_FN (library, png_check_sig); |
| 5903 | LOAD_IMGLIB_FN (library, png_create_read_struct); |
| 5904 | LOAD_IMGLIB_FN (library, png_create_info_struct); |
| 5905 | LOAD_IMGLIB_FN (library, png_destroy_read_struct); |
| 5906 | LOAD_IMGLIB_FN (library, png_set_read_fn); |
| 5907 | LOAD_IMGLIB_FN (library, png_set_sig_bytes); |
| 5908 | LOAD_IMGLIB_FN (library, png_read_info); |
| 5909 | LOAD_IMGLIB_FN (library, png_get_IHDR); |
| 5910 | LOAD_IMGLIB_FN (library, png_get_valid); |
| 5911 | LOAD_IMGLIB_FN (library, png_set_strip_16); |
| 5912 | LOAD_IMGLIB_FN (library, png_set_expand); |
| 5913 | LOAD_IMGLIB_FN (library, png_set_gray_to_rgb); |
| 5914 | LOAD_IMGLIB_FN (library, png_set_background); |
| 5915 | LOAD_IMGLIB_FN (library, png_get_bKGD); |
| 5916 | LOAD_IMGLIB_FN (library, png_read_update_info); |
| 5917 | LOAD_IMGLIB_FN (library, png_get_channels); |
| 5918 | LOAD_IMGLIB_FN (library, png_get_rowbytes); |
| 5919 | LOAD_IMGLIB_FN (library, png_read_image); |
| 5920 | LOAD_IMGLIB_FN (library, png_read_end); |
| 5921 | LOAD_IMGLIB_FN (library, png_error); |
| 5922 | return 1; |
| 5923 | } |
| 5924 | #else |
| 5925 | |
| 5926 | #define fn_png_get_io_ptr png_get_io_ptr |
| 5927 | #define fn_png_check_sig png_check_sig |
| 5928 | #define fn_png_create_read_struct png_create_read_struct |
| 5929 | #define fn_png_create_info_struct png_create_info_struct |
| 5930 | #define fn_png_destroy_read_struct png_destroy_read_struct |
| 5931 | #define fn_png_set_read_fn png_set_read_fn |
| 5932 | #define fn_png_set_sig_bytes png_set_sig_bytes |
| 5933 | #define fn_png_read_info png_read_info |
| 5934 | #define fn_png_get_IHDR png_get_IHDR |
| 5935 | #define fn_png_get_valid png_get_valid |
| 5936 | #define fn_png_set_strip_16 png_set_strip_16 |
| 5937 | #define fn_png_set_expand png_set_expand |
| 5938 | #define fn_png_set_gray_to_rgb png_set_gray_to_rgb |
| 5939 | #define fn_png_set_background png_set_background |
| 5940 | #define fn_png_get_bKGD png_get_bKGD |
| 5941 | #define fn_png_read_update_info png_read_update_info |
| 5942 | #define fn_png_get_channels png_get_channels |
| 5943 | #define fn_png_get_rowbytes png_get_rowbytes |
| 5944 | #define fn_png_read_image png_read_image |
| 5945 | #define fn_png_read_end png_read_end |
| 5946 | #define fn_png_error png_error |
| 5947 | |
| 5948 | #endif /* HAVE_NTGUI */ |
| 5949 | |
| 5950 | /* Error and warning handlers installed when the PNG library |
| 5951 | is initialized. */ |
| 5952 | |
| 5953 | static void |
| 5954 | my_png_error (png_ptr, msg) |
| 5955 | png_struct *png_ptr; |
| 5956 | char *msg; |
| 5957 | { |
| 5958 | xassert (png_ptr != NULL); |
| 5959 | image_error ("PNG error: %s", build_string (msg), Qnil); |
| 5960 | longjmp (png_ptr->jmpbuf, 1); |
| 5961 | } |
| 5962 | |
| 5963 | |
| 5964 | static void |
| 5965 | my_png_warning (png_ptr, msg) |
| 5966 | png_struct *png_ptr; |
| 5967 | char *msg; |
| 5968 | { |
| 5969 | xassert (png_ptr != NULL); |
| 5970 | image_error ("PNG warning: %s", build_string (msg), Qnil); |
| 5971 | } |
| 5972 | |
| 5973 | /* Memory source for PNG decoding. */ |
| 5974 | |
| 5975 | struct png_memory_storage |
| 5976 | { |
| 5977 | unsigned char *bytes; /* The data */ |
| 5978 | size_t len; /* How big is it? */ |
| 5979 | int index; /* Where are we? */ |
| 5980 | }; |
| 5981 | |
| 5982 | |
| 5983 | /* Function set as reader function when reading PNG image from memory. |
| 5984 | PNG_PTR is a pointer to the PNG control structure. Copy LENGTH |
| 5985 | bytes from the input to DATA. */ |
| 5986 | |
| 5987 | static void |
| 5988 | png_read_from_memory (png_ptr, data, length) |
| 5989 | png_structp png_ptr; |
| 5990 | png_bytep data; |
| 5991 | png_size_t length; |
| 5992 | { |
| 5993 | struct png_memory_storage *tbr |
| 5994 | = (struct png_memory_storage *) fn_png_get_io_ptr (png_ptr); |
| 5995 | |
| 5996 | if (length > tbr->len - tbr->index) |
| 5997 | fn_png_error (png_ptr, "Read error"); |
| 5998 | |
| 5999 | bcopy (tbr->bytes + tbr->index, data, length); |
| 6000 | tbr->index = tbr->index + length; |
| 6001 | } |
| 6002 | |
| 6003 | |
| 6004 | /* Function set as reader function when reading PNG image from a file. |
| 6005 | PNG_PTR is a pointer to the PNG control structure. Copy LENGTH |
| 6006 | bytes from the input to DATA. */ |
| 6007 | |
| 6008 | static void |
| 6009 | png_read_from_file (png_ptr, data, length) |
| 6010 | png_structp png_ptr; |
| 6011 | png_bytep data; |
| 6012 | png_size_t length; |
| 6013 | { |
| 6014 | FILE *fp = (FILE *) fn_png_get_io_ptr (png_ptr); |
| 6015 | |
| 6016 | if (fread (data, 1, length, fp) < length) |
| 6017 | fn_png_error (png_ptr, "Read error"); |
| 6018 | } |
| 6019 | |
| 6020 | |
| 6021 | /* Load PNG image IMG for use on frame F. Value is non-zero if |
| 6022 | successful. */ |
| 6023 | |
| 6024 | static int |
| 6025 | png_load (f, img) |
| 6026 | struct frame *f; |
| 6027 | struct image *img; |
| 6028 | { |
| 6029 | Lisp_Object file, specified_file; |
| 6030 | Lisp_Object specified_data; |
| 6031 | int x, y, i; |
| 6032 | XImagePtr ximg, mask_img = NULL; |
| 6033 | struct gcpro gcpro1; |
| 6034 | png_struct *png_ptr = NULL; |
| 6035 | png_info *info_ptr = NULL, *end_info = NULL; |
| 6036 | FILE *volatile fp = NULL; |
| 6037 | png_byte sig[8]; |
| 6038 | png_byte * volatile pixels = NULL; |
| 6039 | png_byte ** volatile rows = NULL; |
| 6040 | png_uint_32 width, height; |
| 6041 | int bit_depth, color_type, interlace_type; |
| 6042 | png_byte channels; |
| 6043 | png_uint_32 row_bytes; |
| 6044 | int transparent_p; |
| 6045 | double screen_gamma; |
| 6046 | struct png_memory_storage tbr; /* Data to be read */ |
| 6047 | |
| 6048 | /* Find out what file to load. */ |
| 6049 | specified_file = image_spec_value (img->spec, QCfile, NULL); |
| 6050 | specified_data = image_spec_value (img->spec, QCdata, NULL); |
| 6051 | file = Qnil; |
| 6052 | GCPRO1 (file); |
| 6053 | |
| 6054 | if (NILP (specified_data)) |
| 6055 | { |
| 6056 | file = x_find_image_file (specified_file); |
| 6057 | if (!STRINGP (file)) |
| 6058 | { |
| 6059 | image_error ("Cannot find image file `%s'", specified_file, Qnil); |
| 6060 | UNGCPRO; |
| 6061 | return 0; |
| 6062 | } |
| 6063 | |
| 6064 | /* Open the image file. */ |
| 6065 | fp = fopen (SDATA (file), "rb"); |
| 6066 | if (!fp) |
| 6067 | { |
| 6068 | image_error ("Cannot open image file `%s'", file, Qnil); |
| 6069 | UNGCPRO; |
| 6070 | fclose (fp); |
| 6071 | return 0; |
| 6072 | } |
| 6073 | |
| 6074 | /* Check PNG signature. */ |
| 6075 | if (fread (sig, 1, sizeof sig, fp) != sizeof sig |
| 6076 | || !fn_png_check_sig (sig, sizeof sig)) |
| 6077 | { |
| 6078 | image_error ("Not a PNG file: `%s'", file, Qnil); |
| 6079 | UNGCPRO; |
| 6080 | fclose (fp); |
| 6081 | return 0; |
| 6082 | } |
| 6083 | } |
| 6084 | else |
| 6085 | { |
| 6086 | /* Read from memory. */ |
| 6087 | tbr.bytes = SDATA (specified_data); |
| 6088 | tbr.len = SBYTES (specified_data); |
| 6089 | tbr.index = 0; |
| 6090 | |
| 6091 | /* Check PNG signature. */ |
| 6092 | if (tbr.len < sizeof sig |
| 6093 | || !fn_png_check_sig (tbr.bytes, sizeof sig)) |
| 6094 | { |
| 6095 | image_error ("Not a PNG image: `%s'", img->spec, Qnil); |
| 6096 | UNGCPRO; |
| 6097 | return 0; |
| 6098 | } |
| 6099 | |
| 6100 | /* Need to skip past the signature. */ |
| 6101 | tbr.bytes += sizeof (sig); |
| 6102 | } |
| 6103 | |
| 6104 | /* Initialize read and info structs for PNG lib. Casting return |
| 6105 | value avoids a GCC warning on W32. */ |
| 6106 | png_ptr = (png_structp)fn_png_create_read_struct (PNG_LIBPNG_VER_STRING, |
| 6107 | NULL, my_png_error, |
| 6108 | my_png_warning); |
| 6109 | if (!png_ptr) |
| 6110 | { |
| 6111 | if (fp) fclose (fp); |
| 6112 | UNGCPRO; |
| 6113 | return 0; |
| 6114 | } |
| 6115 | |
| 6116 | /* Casting return value avoids a GCC warning on W32. */ |
| 6117 | info_ptr = (png_infop)fn_png_create_info_struct (png_ptr); |
| 6118 | if (!info_ptr) |
| 6119 | { |
| 6120 | fn_png_destroy_read_struct (&png_ptr, NULL, NULL); |
| 6121 | if (fp) fclose (fp); |
| 6122 | UNGCPRO; |
| 6123 | return 0; |
| 6124 | } |
| 6125 | |
| 6126 | /* Casting return value avoids a GCC warning on W32. */ |
| 6127 | end_info = (png_infop)fn_png_create_info_struct (png_ptr); |
| 6128 | if (!end_info) |
| 6129 | { |
| 6130 | fn_png_destroy_read_struct (&png_ptr, &info_ptr, NULL); |
| 6131 | if (fp) fclose (fp); |
| 6132 | UNGCPRO; |
| 6133 | return 0; |
| 6134 | } |
| 6135 | |
| 6136 | /* Set error jump-back. We come back here when the PNG library |
| 6137 | detects an error. */ |
| 6138 | if (setjmp (png_ptr->jmpbuf)) |
| 6139 | { |
| 6140 | error: |
| 6141 | if (png_ptr) |
| 6142 | fn_png_destroy_read_struct (&png_ptr, &info_ptr, &end_info); |
| 6143 | xfree (pixels); |
| 6144 | xfree (rows); |
| 6145 | if (fp) fclose (fp); |
| 6146 | UNGCPRO; |
| 6147 | return 0; |
| 6148 | } |
| 6149 | |
| 6150 | /* Read image info. */ |
| 6151 | if (!NILP (specified_data)) |
| 6152 | fn_png_set_read_fn (png_ptr, (void *) &tbr, png_read_from_memory); |
| 6153 | else |
| 6154 | fn_png_set_read_fn (png_ptr, (void *) fp, png_read_from_file); |
| 6155 | |
| 6156 | fn_png_set_sig_bytes (png_ptr, sizeof sig); |
| 6157 | fn_png_read_info (png_ptr, info_ptr); |
| 6158 | fn_png_get_IHDR (png_ptr, info_ptr, &width, &height, &bit_depth, &color_type, |
| 6159 | &interlace_type, NULL, NULL); |
| 6160 | |
| 6161 | if (!check_image_size (f, width, height)) |
| 6162 | goto error; |
| 6163 | |
| 6164 | /* If image contains simply transparency data, we prefer to |
| 6165 | construct a clipping mask. */ |
| 6166 | if (fn_png_get_valid (png_ptr, info_ptr, PNG_INFO_tRNS)) |
| 6167 | transparent_p = 1; |
| 6168 | else |
| 6169 | transparent_p = 0; |
| 6170 | |
| 6171 | /* This function is easier to write if we only have to handle |
| 6172 | one data format: RGB or RGBA with 8 bits per channel. Let's |
| 6173 | transform other formats into that format. */ |
| 6174 | |
| 6175 | /* Strip more than 8 bits per channel. */ |
| 6176 | if (bit_depth == 16) |
| 6177 | fn_png_set_strip_16 (png_ptr); |
| 6178 | |
| 6179 | /* Expand data to 24 bit RGB, or 8 bit grayscale, with alpha channel |
| 6180 | if available. */ |
| 6181 | fn_png_set_expand (png_ptr); |
| 6182 | |
| 6183 | /* Convert grayscale images to RGB. */ |
| 6184 | if (color_type == PNG_COLOR_TYPE_GRAY |
| 6185 | || color_type == PNG_COLOR_TYPE_GRAY_ALPHA) |
| 6186 | fn_png_set_gray_to_rgb (png_ptr); |
| 6187 | |
| 6188 | screen_gamma = (f->gamma ? 1 / f->gamma / 0.45455 : 2.2); |
| 6189 | |
| 6190 | #if 0 /* Avoid double gamma correction for PNG images. */ |
| 6191 | { /* Tell the PNG lib to handle gamma correction for us. */ |
| 6192 | int intent; |
| 6193 | double image_gamma; |
| 6194 | #if defined(PNG_READ_sRGB_SUPPORTED) || defined(PNG_WRITE_sRGB_SUPPORTED) |
| 6195 | if (png_get_sRGB (png_ptr, info_ptr, &intent)) |
| 6196 | /* The libpng documentation says this is right in this case. */ |
| 6197 | png_set_gamma (png_ptr, screen_gamma, 0.45455); |
| 6198 | else |
| 6199 | #endif |
| 6200 | if (png_get_gAMA (png_ptr, info_ptr, &image_gamma)) |
| 6201 | /* Image contains gamma information. */ |
| 6202 | png_set_gamma (png_ptr, screen_gamma, image_gamma); |
| 6203 | else |
| 6204 | /* Use the standard default for the image gamma. */ |
| 6205 | png_set_gamma (png_ptr, screen_gamma, 0.45455); |
| 6206 | } |
| 6207 | #endif /* if 0 */ |
| 6208 | |
| 6209 | /* Handle alpha channel by combining the image with a background |
| 6210 | color. Do this only if a real alpha channel is supplied. For |
| 6211 | simple transparency, we prefer a clipping mask. */ |
| 6212 | if (!transparent_p) |
| 6213 | { |
| 6214 | png_color_16 *image_bg; |
| 6215 | Lisp_Object specified_bg |
| 6216 | = image_spec_value (img->spec, QCbackground, NULL); |
| 6217 | |
| 6218 | if (STRINGP (specified_bg)) |
| 6219 | /* The user specified `:background', use that. */ |
| 6220 | { |
| 6221 | /* W32 version incorrectly used COLORREF here!! ++kfs */ |
| 6222 | XColor color; |
| 6223 | if (x_defined_color (f, SDATA (specified_bg), &color, 0)) |
| 6224 | { |
| 6225 | png_color_16 user_bg; |
| 6226 | |
| 6227 | bzero (&user_bg, sizeof user_bg); |
| 6228 | user_bg.red = color.red >> 8; |
| 6229 | user_bg.green = color.green >> 8; |
| 6230 | user_bg.blue = color.blue >> 8; |
| 6231 | |
| 6232 | fn_png_set_background (png_ptr, &user_bg, |
| 6233 | PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0); |
| 6234 | } |
| 6235 | } |
| 6236 | else if (fn_png_get_bKGD (png_ptr, info_ptr, &image_bg)) |
| 6237 | /* Image contains a background color with which to |
| 6238 | combine the image. */ |
| 6239 | fn_png_set_background (png_ptr, image_bg, |
| 6240 | PNG_BACKGROUND_GAMMA_FILE, 1, 1.0); |
| 6241 | else |
| 6242 | { |
| 6243 | /* Image does not contain a background color with which |
| 6244 | to combine the image data via an alpha channel. Use |
| 6245 | the frame's background instead. */ |
| 6246 | #ifdef HAVE_X_WINDOWS |
| 6247 | XColor color; |
| 6248 | png_color_16 frame_background; |
| 6249 | |
| 6250 | color.pixel = FRAME_BACKGROUND_PIXEL (f); |
| 6251 | x_query_color (f, &color); |
| 6252 | |
| 6253 | bzero (&frame_background, sizeof frame_background); |
| 6254 | frame_background.red = color.red >> 8; |
| 6255 | frame_background.green = color.green >> 8; |
| 6256 | frame_background.blue = color.blue >> 8; |
| 6257 | #endif /* HAVE_X_WINDOWS */ |
| 6258 | |
| 6259 | #ifdef HAVE_NTGUI |
| 6260 | COLORREF color; |
| 6261 | png_color_16 frame_background; |
| 6262 | color = FRAME_BACKGROUND_PIXEL (f); |
| 6263 | #if 0 /* W32 TODO : Colormap support. */ |
| 6264 | x_query_color (f, &color); |
| 6265 | #endif |
| 6266 | bzero (&frame_background, sizeof frame_background); |
| 6267 | frame_background.red = GetRValue (color); |
| 6268 | frame_background.green = GetGValue (color); |
| 6269 | frame_background.blue = GetBValue (color); |
| 6270 | #endif /* HAVE_NTGUI */ |
| 6271 | |
| 6272 | #ifdef MAC_OS |
| 6273 | unsigned long color; |
| 6274 | png_color_16 frame_background; |
| 6275 | color = FRAME_BACKGROUND_PIXEL (f); |
| 6276 | #if 0 /* MAC/W32 TODO : Colormap support. */ |
| 6277 | x_query_color (f, &color); |
| 6278 | #endif |
| 6279 | bzero (&frame_background, sizeof frame_background); |
| 6280 | frame_background.red = RED_FROM_ULONG (color); |
| 6281 | frame_background.green = GREEN_FROM_ULONG (color); |
| 6282 | frame_background.blue = BLUE_FROM_ULONG (color); |
| 6283 | #endif /* MAC_OS */ |
| 6284 | |
| 6285 | fn_png_set_background (png_ptr, &frame_background, |
| 6286 | PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0); |
| 6287 | } |
| 6288 | } |
| 6289 | |
| 6290 | /* Update info structure. */ |
| 6291 | fn_png_read_update_info (png_ptr, info_ptr); |
| 6292 | |
| 6293 | /* Get number of channels. Valid values are 1 for grayscale images |
| 6294 | and images with a palette, 2 for grayscale images with transparency |
| 6295 | information (alpha channel), 3 for RGB images, and 4 for RGB |
| 6296 | images with alpha channel, i.e. RGBA. If conversions above were |
| 6297 | sufficient we should only have 3 or 4 channels here. */ |
| 6298 | channels = fn_png_get_channels (png_ptr, info_ptr); |
| 6299 | xassert (channels == 3 || channels == 4); |
| 6300 | |
| 6301 | /* Number of bytes needed for one row of the image. */ |
| 6302 | row_bytes = fn_png_get_rowbytes (png_ptr, info_ptr); |
| 6303 | |
| 6304 | /* Allocate memory for the image. */ |
| 6305 | pixels = (png_byte *) xmalloc (row_bytes * height * sizeof *pixels); |
| 6306 | rows = (png_byte **) xmalloc (height * sizeof *rows); |
| 6307 | for (i = 0; i < height; ++i) |
| 6308 | rows[i] = pixels + i * row_bytes; |
| 6309 | |
| 6310 | /* Read the entire image. */ |
| 6311 | fn_png_read_image (png_ptr, rows); |
| 6312 | fn_png_read_end (png_ptr, info_ptr); |
| 6313 | if (fp) |
| 6314 | { |
| 6315 | fclose (fp); |
| 6316 | fp = NULL; |
| 6317 | } |
| 6318 | |
| 6319 | /* Create the X image and pixmap. */ |
| 6320 | if (!x_create_x_image_and_pixmap (f, width, height, 0, &ximg, |
| 6321 | &img->pixmap)) |
| 6322 | goto error; |
| 6323 | |
| 6324 | /* Create an image and pixmap serving as mask if the PNG image |
| 6325 | contains an alpha channel. */ |
| 6326 | if (channels == 4 |
| 6327 | && !transparent_p |
| 6328 | && !x_create_x_image_and_pixmap (f, width, height, 1, |
| 6329 | &mask_img, &img->mask)) |
| 6330 | { |
| 6331 | x_destroy_x_image (ximg); |
| 6332 | Free_Pixmap (FRAME_X_DISPLAY (f), img->pixmap); |
| 6333 | img->pixmap = NO_PIXMAP; |
| 6334 | goto error; |
| 6335 | } |
| 6336 | |
| 6337 | /* Fill the X image and mask from PNG data. */ |
| 6338 | init_color_table (); |
| 6339 | |
| 6340 | for (y = 0; y < height; ++y) |
| 6341 | { |
| 6342 | png_byte *p = rows[y]; |
| 6343 | |
| 6344 | for (x = 0; x < width; ++x) |
| 6345 | { |
| 6346 | unsigned r, g, b; |
| 6347 | |
| 6348 | r = *p++ << 8; |
| 6349 | g = *p++ << 8; |
| 6350 | b = *p++ << 8; |
| 6351 | XPutPixel (ximg, x, y, lookup_rgb_color (f, r, g, b)); |
| 6352 | /* An alpha channel, aka mask channel, associates variable |
| 6353 | transparency with an image. Where other image formats |
| 6354 | support binary transparency---fully transparent or fully |
| 6355 | opaque---PNG allows up to 254 levels of partial transparency. |
| 6356 | The PNG library implements partial transparency by combining |
| 6357 | the image with a specified background color. |
| 6358 | |
| 6359 | I'm not sure how to handle this here nicely: because the |
| 6360 | background on which the image is displayed may change, for |
| 6361 | real alpha channel support, it would be necessary to create |
| 6362 | a new image for each possible background. |
| 6363 | |
| 6364 | What I'm doing now is that a mask is created if we have |
| 6365 | boolean transparency information. Otherwise I'm using |
| 6366 | the frame's background color to combine the image with. */ |
| 6367 | |
| 6368 | if (channels == 4) |
| 6369 | { |
| 6370 | if (mask_img) |
| 6371 | XPutPixel (mask_img, x, y, *p > 0 ? PIX_MASK_DRAW : PIX_MASK_RETAIN); |
| 6372 | ++p; |
| 6373 | } |
| 6374 | } |
| 6375 | } |
| 6376 | |
| 6377 | if (NILP (image_spec_value (img->spec, QCbackground, NULL))) |
| 6378 | /* Set IMG's background color from the PNG image, unless the user |
| 6379 | overrode it. */ |
| 6380 | { |
| 6381 | png_color_16 *bg; |
| 6382 | if (fn_png_get_bKGD (png_ptr, info_ptr, &bg)) |
| 6383 | { |
| 6384 | img->background = lookup_rgb_color (f, bg->red, bg->green, bg->blue); |
| 6385 | img->background_valid = 1; |
| 6386 | } |
| 6387 | } |
| 6388 | |
| 6389 | #ifdef COLOR_TABLE_SUPPORT |
| 6390 | /* Remember colors allocated for this image. */ |
| 6391 | img->colors = colors_in_color_table (&img->ncolors); |
| 6392 | free_color_table (); |
| 6393 | #endif /* COLOR_TABLE_SUPPORT */ |
| 6394 | |
| 6395 | /* Clean up. */ |
| 6396 | fn_png_destroy_read_struct (&png_ptr, &info_ptr, &end_info); |
| 6397 | xfree (rows); |
| 6398 | xfree (pixels); |
| 6399 | |
| 6400 | img->width = width; |
| 6401 | img->height = height; |
| 6402 | |
| 6403 | /* Maybe fill in the background field while we have ximg handy. |
| 6404 | Casting avoids a GCC warning. */ |
| 6405 | IMAGE_BACKGROUND (img, f, (XImagePtr_or_DC)ximg); |
| 6406 | |
| 6407 | /* Put the image into the pixmap, then free the X image and its buffer. */ |
| 6408 | x_put_x_image (f, ximg, img->pixmap, width, height); |
| 6409 | x_destroy_x_image (ximg); |
| 6410 | |
| 6411 | /* Same for the mask. */ |
| 6412 | if (mask_img) |
| 6413 | { |
| 6414 | /* Fill in the background_transparent field while we have the |
| 6415 | mask handy. Casting avoids a GCC warning. */ |
| 6416 | image_background_transparent (img, f, (XImagePtr_or_DC)mask_img); |
| 6417 | |
| 6418 | x_put_x_image (f, mask_img, img->mask, img->width, img->height); |
| 6419 | x_destroy_x_image (mask_img); |
| 6420 | } |
| 6421 | |
| 6422 | UNGCPRO; |
| 6423 | return 1; |
| 6424 | } |
| 6425 | |
| 6426 | #else /* HAVE_PNG */ |
| 6427 | |
| 6428 | #ifdef MAC_OS |
| 6429 | static int |
| 6430 | png_load (f, img) |
| 6431 | struct frame *f; |
| 6432 | struct image *img; |
| 6433 | { |
| 6434 | #ifdef MAC_OSX |
| 6435 | if (MyCGImageCreateWithPNGDataProvider) |
| 6436 | return image_load_quartz2d (f, img, 1); |
| 6437 | else |
| 6438 | #endif |
| 6439 | return image_load_quicktime (f, img, kQTFileTypePNG); |
| 6440 | } |
| 6441 | #endif /* MAC_OS */ |
| 6442 | |
| 6443 | #endif /* !HAVE_PNG */ |
| 6444 | |
| 6445 | |
| 6446 | \f |
| 6447 | /*********************************************************************** |
| 6448 | JPEG |
| 6449 | ***********************************************************************/ |
| 6450 | |
| 6451 | #if defined (HAVE_JPEG) || defined (MAC_OS) |
| 6452 | |
| 6453 | static int jpeg_image_p P_ ((Lisp_Object object)); |
| 6454 | static int jpeg_load P_ ((struct frame *f, struct image *img)); |
| 6455 | |
| 6456 | /* The symbol `jpeg' identifying images of this type. */ |
| 6457 | |
| 6458 | Lisp_Object Qjpeg; |
| 6459 | |
| 6460 | /* Indices of image specification fields in gs_format, below. */ |
| 6461 | |
| 6462 | enum jpeg_keyword_index |
| 6463 | { |
| 6464 | JPEG_TYPE, |
| 6465 | JPEG_DATA, |
| 6466 | JPEG_FILE, |
| 6467 | JPEG_ASCENT, |
| 6468 | JPEG_MARGIN, |
| 6469 | JPEG_RELIEF, |
| 6470 | JPEG_ALGORITHM, |
| 6471 | JPEG_HEURISTIC_MASK, |
| 6472 | JPEG_MASK, |
| 6473 | JPEG_BACKGROUND, |
| 6474 | JPEG_LAST |
| 6475 | }; |
| 6476 | |
| 6477 | /* Vector of image_keyword structures describing the format |
| 6478 | of valid user-defined image specifications. */ |
| 6479 | |
| 6480 | static struct image_keyword jpeg_format[JPEG_LAST] = |
| 6481 | { |
| 6482 | {":type", IMAGE_SYMBOL_VALUE, 1}, |
| 6483 | {":data", IMAGE_STRING_VALUE, 0}, |
| 6484 | {":file", IMAGE_STRING_VALUE, 0}, |
| 6485 | {":ascent", IMAGE_ASCENT_VALUE, 0}, |
| 6486 | {":margin", IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR, 0}, |
| 6487 | {":relief", IMAGE_INTEGER_VALUE, 0}, |
| 6488 | {":conversions", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, |
| 6489 | {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, |
| 6490 | {":mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, |
| 6491 | {":background", IMAGE_STRING_OR_NIL_VALUE, 0} |
| 6492 | }; |
| 6493 | |
| 6494 | /* Structure describing the image type `jpeg'. */ |
| 6495 | |
| 6496 | static struct image_type jpeg_type = |
| 6497 | { |
| 6498 | &Qjpeg, |
| 6499 | jpeg_image_p, |
| 6500 | jpeg_load, |
| 6501 | x_clear_image, |
| 6502 | NULL |
| 6503 | }; |
| 6504 | |
| 6505 | /* Return non-zero if OBJECT is a valid JPEG image specification. */ |
| 6506 | |
| 6507 | static int |
| 6508 | jpeg_image_p (object) |
| 6509 | Lisp_Object object; |
| 6510 | { |
| 6511 | struct image_keyword fmt[JPEG_LAST]; |
| 6512 | |
| 6513 | bcopy (jpeg_format, fmt, sizeof fmt); |
| 6514 | |
| 6515 | if (!parse_image_spec (object, fmt, JPEG_LAST, Qjpeg)) |
| 6516 | return 0; |
| 6517 | |
| 6518 | /* Must specify either the :data or :file keyword. */ |
| 6519 | return fmt[JPEG_FILE].count + fmt[JPEG_DATA].count == 1; |
| 6520 | } |
| 6521 | |
| 6522 | #endif /* HAVE_JPEG || MAC_OS */ |
| 6523 | |
| 6524 | #ifdef HAVE_JPEG |
| 6525 | |
| 6526 | /* Work around a warning about HAVE_STDLIB_H being redefined in |
| 6527 | jconfig.h. */ |
| 6528 | #ifdef HAVE_STDLIB_H |
| 6529 | #define HAVE_STDLIB_H_1 |
| 6530 | #undef HAVE_STDLIB_H |
| 6531 | #endif /* HAVE_STLIB_H */ |
| 6532 | |
| 6533 | #if defined (HAVE_NTGUI) && !defined (__WIN32__) |
| 6534 | /* In older releases of the jpeg library, jpeglib.h will define boolean |
| 6535 | differently depending on __WIN32__, so make sure it is defined. */ |
| 6536 | #define __WIN32__ 1 |
| 6537 | #endif |
| 6538 | |
| 6539 | #include <jpeglib.h> |
| 6540 | #include <jerror.h> |
| 6541 | #include <setjmp.h> |
| 6542 | |
| 6543 | #ifdef HAVE_STLIB_H_1 |
| 6544 | #define HAVE_STDLIB_H 1 |
| 6545 | #endif |
| 6546 | |
| 6547 | #ifdef HAVE_NTGUI |
| 6548 | |
| 6549 | /* JPEG library details. */ |
| 6550 | DEF_IMGLIB_FN (jpeg_CreateDecompress); |
| 6551 | DEF_IMGLIB_FN (jpeg_start_decompress); |
| 6552 | DEF_IMGLIB_FN (jpeg_finish_decompress); |
| 6553 | DEF_IMGLIB_FN (jpeg_destroy_decompress); |
| 6554 | DEF_IMGLIB_FN (jpeg_read_header); |
| 6555 | DEF_IMGLIB_FN (jpeg_read_scanlines); |
| 6556 | DEF_IMGLIB_FN (jpeg_std_error); |
| 6557 | DEF_IMGLIB_FN (jpeg_resync_to_restart); |
| 6558 | |
| 6559 | static int |
| 6560 | init_jpeg_functions (Lisp_Object libraries) |
| 6561 | { |
| 6562 | HMODULE library; |
| 6563 | |
| 6564 | if (!(library = w32_delayed_load (libraries, Qjpeg))) |
| 6565 | return 0; |
| 6566 | |
| 6567 | LOAD_IMGLIB_FN (library, jpeg_finish_decompress); |
| 6568 | LOAD_IMGLIB_FN (library, jpeg_read_scanlines); |
| 6569 | LOAD_IMGLIB_FN (library, jpeg_start_decompress); |
| 6570 | LOAD_IMGLIB_FN (library, jpeg_read_header); |
| 6571 | LOAD_IMGLIB_FN (library, jpeg_CreateDecompress); |
| 6572 | LOAD_IMGLIB_FN (library, jpeg_destroy_decompress); |
| 6573 | LOAD_IMGLIB_FN (library, jpeg_std_error); |
| 6574 | LOAD_IMGLIB_FN (library, jpeg_resync_to_restart); |
| 6575 | return 1; |
| 6576 | } |
| 6577 | |
| 6578 | /* Wrapper since we can't directly assign the function pointer |
| 6579 | to another function pointer that was declared more completely easily. */ |
| 6580 | static boolean |
| 6581 | jpeg_resync_to_restart_wrapper(cinfo, desired) |
| 6582 | j_decompress_ptr cinfo; |
| 6583 | int desired; |
| 6584 | { |
| 6585 | return fn_jpeg_resync_to_restart (cinfo, desired); |
| 6586 | } |
| 6587 | |
| 6588 | #else |
| 6589 | |
| 6590 | #define fn_jpeg_CreateDecompress(a,b,c) jpeg_create_decompress(a) |
| 6591 | #define fn_jpeg_start_decompress jpeg_start_decompress |
| 6592 | #define fn_jpeg_finish_decompress jpeg_finish_decompress |
| 6593 | #define fn_jpeg_destroy_decompress jpeg_destroy_decompress |
| 6594 | #define fn_jpeg_read_header jpeg_read_header |
| 6595 | #define fn_jpeg_read_scanlines jpeg_read_scanlines |
| 6596 | #define fn_jpeg_std_error jpeg_std_error |
| 6597 | #define jpeg_resync_to_restart_wrapper jpeg_resync_to_restart |
| 6598 | |
| 6599 | #endif /* HAVE_NTGUI */ |
| 6600 | |
| 6601 | struct my_jpeg_error_mgr |
| 6602 | { |
| 6603 | struct jpeg_error_mgr pub; |
| 6604 | jmp_buf setjmp_buffer; |
| 6605 | }; |
| 6606 | |
| 6607 | |
| 6608 | static void |
| 6609 | my_error_exit (cinfo) |
| 6610 | j_common_ptr cinfo; |
| 6611 | { |
| 6612 | struct my_jpeg_error_mgr *mgr = (struct my_jpeg_error_mgr *) cinfo->err; |
| 6613 | longjmp (mgr->setjmp_buffer, 1); |
| 6614 | } |
| 6615 | |
| 6616 | |
| 6617 | /* Init source method for JPEG data source manager. Called by |
| 6618 | jpeg_read_header() before any data is actually read. See |
| 6619 | libjpeg.doc from the JPEG lib distribution. */ |
| 6620 | |
| 6621 | static void |
| 6622 | our_common_init_source (cinfo) |
| 6623 | j_decompress_ptr cinfo; |
| 6624 | { |
| 6625 | } |
| 6626 | |
| 6627 | |
| 6628 | /* Method to terminate data source. Called by |
| 6629 | jpeg_finish_decompress() after all data has been processed. */ |
| 6630 | |
| 6631 | static void |
| 6632 | our_common_term_source (cinfo) |
| 6633 | j_decompress_ptr cinfo; |
| 6634 | { |
| 6635 | } |
| 6636 | |
| 6637 | |
| 6638 | /* Fill input buffer method for JPEG data source manager. Called |
| 6639 | whenever more data is needed. We read the whole image in one step, |
| 6640 | so this only adds a fake end of input marker at the end. */ |
| 6641 | |
| 6642 | static boolean |
| 6643 | our_memory_fill_input_buffer (cinfo) |
| 6644 | j_decompress_ptr cinfo; |
| 6645 | { |
| 6646 | /* Insert a fake EOI marker. */ |
| 6647 | struct jpeg_source_mgr *src = cinfo->src; |
| 6648 | static JOCTET buffer[2]; |
| 6649 | |
| 6650 | buffer[0] = (JOCTET) 0xFF; |
| 6651 | buffer[1] = (JOCTET) JPEG_EOI; |
| 6652 | |
| 6653 | src->next_input_byte = buffer; |
| 6654 | src->bytes_in_buffer = 2; |
| 6655 | return 1; |
| 6656 | } |
| 6657 | |
| 6658 | |
| 6659 | /* Method to skip over NUM_BYTES bytes in the image data. CINFO->src |
| 6660 | is the JPEG data source manager. */ |
| 6661 | |
| 6662 | static void |
| 6663 | our_memory_skip_input_data (cinfo, num_bytes) |
| 6664 | j_decompress_ptr cinfo; |
| 6665 | long num_bytes; |
| 6666 | { |
| 6667 | struct jpeg_source_mgr *src = (struct jpeg_source_mgr *) cinfo->src; |
| 6668 | |
| 6669 | if (src) |
| 6670 | { |
| 6671 | if (num_bytes > src->bytes_in_buffer) |
| 6672 | ERREXIT (cinfo, JERR_INPUT_EOF); |
| 6673 | |
| 6674 | src->bytes_in_buffer -= num_bytes; |
| 6675 | src->next_input_byte += num_bytes; |
| 6676 | } |
| 6677 | } |
| 6678 | |
| 6679 | |
| 6680 | /* Set up the JPEG lib for reading an image from DATA which contains |
| 6681 | LEN bytes. CINFO is the decompression info structure created for |
| 6682 | reading the image. */ |
| 6683 | |
| 6684 | static void |
| 6685 | jpeg_memory_src (cinfo, data, len) |
| 6686 | j_decompress_ptr cinfo; |
| 6687 | JOCTET *data; |
| 6688 | unsigned int len; |
| 6689 | { |
| 6690 | struct jpeg_source_mgr *src; |
| 6691 | |
| 6692 | if (cinfo->src == NULL) |
| 6693 | { |
| 6694 | /* First time for this JPEG object? */ |
| 6695 | cinfo->src = (struct jpeg_source_mgr *) |
| 6696 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT, |
| 6697 | sizeof (struct jpeg_source_mgr)); |
| 6698 | src = (struct jpeg_source_mgr *) cinfo->src; |
| 6699 | src->next_input_byte = data; |
| 6700 | } |
| 6701 | |
| 6702 | src = (struct jpeg_source_mgr *) cinfo->src; |
| 6703 | src->init_source = our_common_init_source; |
| 6704 | src->fill_input_buffer = our_memory_fill_input_buffer; |
| 6705 | src->skip_input_data = our_memory_skip_input_data; |
| 6706 | src->resync_to_restart = jpeg_resync_to_restart_wrapper; /* Use default method. */ |
| 6707 | src->term_source = our_common_term_source; |
| 6708 | src->bytes_in_buffer = len; |
| 6709 | src->next_input_byte = data; |
| 6710 | } |
| 6711 | |
| 6712 | |
| 6713 | struct jpeg_stdio_mgr |
| 6714 | { |
| 6715 | struct jpeg_source_mgr mgr; |
| 6716 | boolean finished; |
| 6717 | FILE *file; |
| 6718 | JOCTET *buffer; |
| 6719 | }; |
| 6720 | |
| 6721 | |
| 6722 | /* Size of buffer to read JPEG from file. |
| 6723 | Not too big, as we want to use alloc_small. */ |
| 6724 | #define JPEG_STDIO_BUFFER_SIZE 8192 |
| 6725 | |
| 6726 | |
| 6727 | /* Fill input buffer method for JPEG data source manager. Called |
| 6728 | whenever more data is needed. The data is read from a FILE *. */ |
| 6729 | |
| 6730 | static boolean |
| 6731 | our_stdio_fill_input_buffer (cinfo) |
| 6732 | j_decompress_ptr cinfo; |
| 6733 | { |
| 6734 | struct jpeg_stdio_mgr *src; |
| 6735 | |
| 6736 | src = (struct jpeg_stdio_mgr *) cinfo->src; |
| 6737 | if (!src->finished) |
| 6738 | { |
| 6739 | size_t bytes; |
| 6740 | |
| 6741 | bytes = fread (src->buffer, 1, JPEG_STDIO_BUFFER_SIZE, src->file); |
| 6742 | if (bytes > 0) |
| 6743 | src->mgr.bytes_in_buffer = bytes; |
| 6744 | else |
| 6745 | { |
| 6746 | WARNMS (cinfo, JWRN_JPEG_EOF); |
| 6747 | src->finished = 1; |
| 6748 | src->buffer[0] = (JOCTET) 0xFF; |
| 6749 | src->buffer[1] = (JOCTET) JPEG_EOI; |
| 6750 | src->mgr.bytes_in_buffer = 2; |
| 6751 | } |
| 6752 | src->mgr.next_input_byte = src->buffer; |
| 6753 | } |
| 6754 | |
| 6755 | return 1; |
| 6756 | } |
| 6757 | |
| 6758 | |
| 6759 | /* Method to skip over NUM_BYTES bytes in the image data. CINFO->src |
| 6760 | is the JPEG data source manager. */ |
| 6761 | |
| 6762 | static void |
| 6763 | our_stdio_skip_input_data (cinfo, num_bytes) |
| 6764 | j_decompress_ptr cinfo; |
| 6765 | long num_bytes; |
| 6766 | { |
| 6767 | struct jpeg_stdio_mgr *src; |
| 6768 | src = (struct jpeg_stdio_mgr *) cinfo->src; |
| 6769 | |
| 6770 | while (num_bytes > 0 && !src->finished) |
| 6771 | { |
| 6772 | if (num_bytes <= src->mgr.bytes_in_buffer) |
| 6773 | { |
| 6774 | src->mgr.bytes_in_buffer -= num_bytes; |
| 6775 | src->mgr.next_input_byte += num_bytes; |
| 6776 | break; |
| 6777 | } |
| 6778 | else |
| 6779 | { |
| 6780 | num_bytes -= src->mgr.bytes_in_buffer; |
| 6781 | src->mgr.bytes_in_buffer = 0; |
| 6782 | src->mgr.next_input_byte = NULL; |
| 6783 | |
| 6784 | our_stdio_fill_input_buffer (cinfo); |
| 6785 | } |
| 6786 | } |
| 6787 | } |
| 6788 | |
| 6789 | |
| 6790 | /* Set up the JPEG lib for reading an image from a FILE *. |
| 6791 | CINFO is the decompression info structure created for |
| 6792 | reading the image. */ |
| 6793 | |
| 6794 | static void |
| 6795 | jpeg_file_src (cinfo, fp) |
| 6796 | j_decompress_ptr cinfo; |
| 6797 | FILE *fp; |
| 6798 | { |
| 6799 | struct jpeg_stdio_mgr *src; |
| 6800 | |
| 6801 | if (cinfo->src != NULL) |
| 6802 | src = (struct jpeg_stdio_mgr *) cinfo->src; |
| 6803 | else |
| 6804 | { |
| 6805 | /* First time for this JPEG object? */ |
| 6806 | cinfo->src = (struct jpeg_source_mgr *) |
| 6807 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT, |
| 6808 | sizeof (struct jpeg_stdio_mgr)); |
| 6809 | src = (struct jpeg_stdio_mgr *) cinfo->src; |
| 6810 | src->buffer = (JOCTET *) |
| 6811 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT, |
| 6812 | JPEG_STDIO_BUFFER_SIZE); |
| 6813 | } |
| 6814 | |
| 6815 | src->file = fp; |
| 6816 | src->finished = 0; |
| 6817 | src->mgr.init_source = our_common_init_source; |
| 6818 | src->mgr.fill_input_buffer = our_stdio_fill_input_buffer; |
| 6819 | src->mgr.skip_input_data = our_stdio_skip_input_data; |
| 6820 | src->mgr.resync_to_restart = jpeg_resync_to_restart_wrapper; /* Use default method. */ |
| 6821 | src->mgr.term_source = our_common_term_source; |
| 6822 | src->mgr.bytes_in_buffer = 0; |
| 6823 | src->mgr.next_input_byte = NULL; |
| 6824 | } |
| 6825 | |
| 6826 | |
| 6827 | /* Load image IMG for use on frame F. Patterned after example.c |
| 6828 | from the JPEG lib. */ |
| 6829 | |
| 6830 | static int |
| 6831 | jpeg_load (f, img) |
| 6832 | struct frame *f; |
| 6833 | struct image *img; |
| 6834 | { |
| 6835 | struct jpeg_decompress_struct cinfo; |
| 6836 | struct my_jpeg_error_mgr mgr; |
| 6837 | Lisp_Object file, specified_file; |
| 6838 | Lisp_Object specified_data; |
| 6839 | FILE * volatile fp = NULL; |
| 6840 | JSAMPARRAY buffer; |
| 6841 | int row_stride, x, y; |
| 6842 | XImagePtr ximg = NULL; |
| 6843 | int rc; |
| 6844 | unsigned long *colors; |
| 6845 | int width, height; |
| 6846 | struct gcpro gcpro1; |
| 6847 | |
| 6848 | /* Open the JPEG file. */ |
| 6849 | specified_file = image_spec_value (img->spec, QCfile, NULL); |
| 6850 | specified_data = image_spec_value (img->spec, QCdata, NULL); |
| 6851 | file = Qnil; |
| 6852 | GCPRO1 (file); |
| 6853 | |
| 6854 | if (NILP (specified_data)) |
| 6855 | { |
| 6856 | file = x_find_image_file (specified_file); |
| 6857 | if (!STRINGP (file)) |
| 6858 | { |
| 6859 | image_error ("Cannot find image file `%s'", specified_file, Qnil); |
| 6860 | UNGCPRO; |
| 6861 | return 0; |
| 6862 | } |
| 6863 | |
| 6864 | fp = fopen (SDATA (file), "rb"); |
| 6865 | if (fp == NULL) |
| 6866 | { |
| 6867 | image_error ("Cannot open `%s'", file, Qnil); |
| 6868 | UNGCPRO; |
| 6869 | return 0; |
| 6870 | } |
| 6871 | } |
| 6872 | |
| 6873 | /* Customize libjpeg's error handling to call my_error_exit when an |
| 6874 | error is detected. This function will perform a longjmp. |
| 6875 | Casting return value avoids a GCC warning on W32. */ |
| 6876 | cinfo.err = (struct jpeg_error_mgr *)fn_jpeg_std_error (&mgr.pub); |
| 6877 | mgr.pub.error_exit = my_error_exit; |
| 6878 | |
| 6879 | if ((rc = setjmp (mgr.setjmp_buffer)) != 0) |
| 6880 | { |
| 6881 | if (rc == 1) |
| 6882 | { |
| 6883 | /* Called from my_error_exit. Display a JPEG error. */ |
| 6884 | char buffer[JMSG_LENGTH_MAX]; |
| 6885 | cinfo.err->format_message ((j_common_ptr) &cinfo, buffer); |
| 6886 | image_error ("Error reading JPEG image `%s': %s", img->spec, |
| 6887 | build_string (buffer)); |
| 6888 | } |
| 6889 | |
| 6890 | /* Close the input file and destroy the JPEG object. */ |
| 6891 | if (fp) |
| 6892 | fclose ((FILE *) fp); |
| 6893 | fn_jpeg_destroy_decompress (&cinfo); |
| 6894 | |
| 6895 | /* If we already have an XImage, free that. */ |
| 6896 | x_destroy_x_image (ximg); |
| 6897 | |
| 6898 | /* Free pixmap and colors. */ |
| 6899 | x_clear_image (f, img); |
| 6900 | |
| 6901 | UNGCPRO; |
| 6902 | return 0; |
| 6903 | } |
| 6904 | |
| 6905 | /* Create the JPEG decompression object. Let it read from fp. |
| 6906 | Read the JPEG image header. */ |
| 6907 | fn_jpeg_CreateDecompress (&cinfo, JPEG_LIB_VERSION, sizeof (cinfo)); |
| 6908 | |
| 6909 | if (NILP (specified_data)) |
| 6910 | jpeg_file_src (&cinfo, (FILE *) fp); |
| 6911 | else |
| 6912 | jpeg_memory_src (&cinfo, SDATA (specified_data), |
| 6913 | SBYTES (specified_data)); |
| 6914 | |
| 6915 | fn_jpeg_read_header (&cinfo, 1); |
| 6916 | |
| 6917 | /* Customize decompression so that color quantization will be used. |
| 6918 | Start decompression. */ |
| 6919 | cinfo.quantize_colors = 1; |
| 6920 | fn_jpeg_start_decompress (&cinfo); |
| 6921 | width = img->width = cinfo.output_width; |
| 6922 | height = img->height = cinfo.output_height; |
| 6923 | |
| 6924 | if (!check_image_size (f, width, height)) |
| 6925 | { |
| 6926 | image_error ("Invalid image size", Qnil, Qnil); |
| 6927 | longjmp (mgr.setjmp_buffer, 2); |
| 6928 | } |
| 6929 | |
| 6930 | /* Create X image and pixmap. */ |
| 6931 | if (!x_create_x_image_and_pixmap (f, width, height, 0, &ximg, &img->pixmap)) |
| 6932 | longjmp (mgr.setjmp_buffer, 2); |
| 6933 | |
| 6934 | /* Allocate colors. When color quantization is used, |
| 6935 | cinfo.actual_number_of_colors has been set with the number of |
| 6936 | colors generated, and cinfo.colormap is a two-dimensional array |
| 6937 | of color indices in the range 0..cinfo.actual_number_of_colors. |
| 6938 | No more than 255 colors will be generated. */ |
| 6939 | { |
| 6940 | int i, ir, ig, ib; |
| 6941 | |
| 6942 | if (cinfo.out_color_components > 2) |
| 6943 | ir = 0, ig = 1, ib = 2; |
| 6944 | else if (cinfo.out_color_components > 1) |
| 6945 | ir = 0, ig = 1, ib = 0; |
| 6946 | else |
| 6947 | ir = 0, ig = 0, ib = 0; |
| 6948 | |
| 6949 | /* Use the color table mechanism because it handles colors that |
| 6950 | cannot be allocated nicely. Such colors will be replaced with |
| 6951 | a default color, and we don't have to care about which colors |
| 6952 | can be freed safely, and which can't. */ |
| 6953 | init_color_table (); |
| 6954 | colors = (unsigned long *) alloca (cinfo.actual_number_of_colors |
| 6955 | * sizeof *colors); |
| 6956 | |
| 6957 | for (i = 0; i < cinfo.actual_number_of_colors; ++i) |
| 6958 | { |
| 6959 | /* Multiply RGB values with 255 because X expects RGB values |
| 6960 | in the range 0..0xffff. */ |
| 6961 | int r = cinfo.colormap[ir][i] << 8; |
| 6962 | int g = cinfo.colormap[ig][i] << 8; |
| 6963 | int b = cinfo.colormap[ib][i] << 8; |
| 6964 | colors[i] = lookup_rgb_color (f, r, g, b); |
| 6965 | } |
| 6966 | |
| 6967 | #ifdef COLOR_TABLE_SUPPORT |
| 6968 | /* Remember those colors actually allocated. */ |
| 6969 | img->colors = colors_in_color_table (&img->ncolors); |
| 6970 | free_color_table (); |
| 6971 | #endif /* COLOR_TABLE_SUPPORT */ |
| 6972 | } |
| 6973 | |
| 6974 | /* Read pixels. */ |
| 6975 | row_stride = width * cinfo.output_components; |
| 6976 | buffer = cinfo.mem->alloc_sarray ((j_common_ptr) &cinfo, JPOOL_IMAGE, |
| 6977 | row_stride, 1); |
| 6978 | for (y = 0; y < height; ++y) |
| 6979 | { |
| 6980 | fn_jpeg_read_scanlines (&cinfo, buffer, 1); |
| 6981 | for (x = 0; x < cinfo.output_width; ++x) |
| 6982 | XPutPixel (ximg, x, y, colors[buffer[0][x]]); |
| 6983 | } |
| 6984 | |
| 6985 | /* Clean up. */ |
| 6986 | fn_jpeg_finish_decompress (&cinfo); |
| 6987 | fn_jpeg_destroy_decompress (&cinfo); |
| 6988 | if (fp) |
| 6989 | fclose ((FILE *) fp); |
| 6990 | |
| 6991 | /* Maybe fill in the background field while we have ximg handy. */ |
| 6992 | if (NILP (image_spec_value (img->spec, QCbackground, NULL))) |
| 6993 | /* Casting avoids a GCC warning. */ |
| 6994 | IMAGE_BACKGROUND (img, f, (XImagePtr_or_DC)ximg); |
| 6995 | |
| 6996 | /* Put the image into the pixmap. */ |
| 6997 | x_put_x_image (f, ximg, img->pixmap, width, height); |
| 6998 | x_destroy_x_image (ximg); |
| 6999 | UNGCPRO; |
| 7000 | return 1; |
| 7001 | } |
| 7002 | |
| 7003 | #else /* HAVE_JPEG */ |
| 7004 | |
| 7005 | #ifdef MAC_OS |
| 7006 | static int |
| 7007 | jpeg_load (f, img) |
| 7008 | struct frame *f; |
| 7009 | struct image *img; |
| 7010 | { |
| 7011 | #ifdef MAC_OSX |
| 7012 | return image_load_quartz2d (f, img, 0); |
| 7013 | #else |
| 7014 | return image_load_quicktime (f, img, kQTFileTypeJPEG); |
| 7015 | #endif |
| 7016 | } |
| 7017 | #endif /* MAC_OS */ |
| 7018 | |
| 7019 | #endif /* !HAVE_JPEG */ |
| 7020 | |
| 7021 | |
| 7022 | \f |
| 7023 | /*********************************************************************** |
| 7024 | TIFF |
| 7025 | ***********************************************************************/ |
| 7026 | |
| 7027 | #if defined (HAVE_TIFF) || defined (MAC_OS) |
| 7028 | |
| 7029 | static int tiff_image_p P_ ((Lisp_Object object)); |
| 7030 | static int tiff_load P_ ((struct frame *f, struct image *img)); |
| 7031 | |
| 7032 | /* The symbol `tiff' identifying images of this type. */ |
| 7033 | |
| 7034 | Lisp_Object Qtiff; |
| 7035 | |
| 7036 | /* Indices of image specification fields in tiff_format, below. */ |
| 7037 | |
| 7038 | enum tiff_keyword_index |
| 7039 | { |
| 7040 | TIFF_TYPE, |
| 7041 | TIFF_DATA, |
| 7042 | TIFF_FILE, |
| 7043 | TIFF_ASCENT, |
| 7044 | TIFF_MARGIN, |
| 7045 | TIFF_RELIEF, |
| 7046 | TIFF_ALGORITHM, |
| 7047 | TIFF_HEURISTIC_MASK, |
| 7048 | TIFF_MASK, |
| 7049 | TIFF_BACKGROUND, |
| 7050 | TIFF_LAST |
| 7051 | }; |
| 7052 | |
| 7053 | /* Vector of image_keyword structures describing the format |
| 7054 | of valid user-defined image specifications. */ |
| 7055 | |
| 7056 | static struct image_keyword tiff_format[TIFF_LAST] = |
| 7057 | { |
| 7058 | {":type", IMAGE_SYMBOL_VALUE, 1}, |
| 7059 | {":data", IMAGE_STRING_VALUE, 0}, |
| 7060 | {":file", IMAGE_STRING_VALUE, 0}, |
| 7061 | {":ascent", IMAGE_ASCENT_VALUE, 0}, |
| 7062 | {":margin", IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR, 0}, |
| 7063 | {":relief", IMAGE_INTEGER_VALUE, 0}, |
| 7064 | {":conversions", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, |
| 7065 | {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, |
| 7066 | {":mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, |
| 7067 | {":background", IMAGE_STRING_OR_NIL_VALUE, 0} |
| 7068 | }; |
| 7069 | |
| 7070 | /* Structure describing the image type `tiff'. */ |
| 7071 | |
| 7072 | static struct image_type tiff_type = |
| 7073 | { |
| 7074 | &Qtiff, |
| 7075 | tiff_image_p, |
| 7076 | tiff_load, |
| 7077 | x_clear_image, |
| 7078 | NULL |
| 7079 | }; |
| 7080 | |
| 7081 | /* Return non-zero if OBJECT is a valid TIFF image specification. */ |
| 7082 | |
| 7083 | static int |
| 7084 | tiff_image_p (object) |
| 7085 | Lisp_Object object; |
| 7086 | { |
| 7087 | struct image_keyword fmt[TIFF_LAST]; |
| 7088 | bcopy (tiff_format, fmt, sizeof fmt); |
| 7089 | |
| 7090 | if (!parse_image_spec (object, fmt, TIFF_LAST, Qtiff)) |
| 7091 | return 0; |
| 7092 | |
| 7093 | /* Must specify either the :data or :file keyword. */ |
| 7094 | return fmt[TIFF_FILE].count + fmt[TIFF_DATA].count == 1; |
| 7095 | } |
| 7096 | |
| 7097 | #endif /* HAVE_TIFF || MAC_OS */ |
| 7098 | |
| 7099 | #ifdef HAVE_TIFF |
| 7100 | |
| 7101 | #include <tiffio.h> |
| 7102 | |
| 7103 | #ifdef HAVE_NTGUI |
| 7104 | |
| 7105 | /* TIFF library details. */ |
| 7106 | DEF_IMGLIB_FN (TIFFSetErrorHandler); |
| 7107 | DEF_IMGLIB_FN (TIFFSetWarningHandler); |
| 7108 | DEF_IMGLIB_FN (TIFFOpen); |
| 7109 | DEF_IMGLIB_FN (TIFFClientOpen); |
| 7110 | DEF_IMGLIB_FN (TIFFGetField); |
| 7111 | DEF_IMGLIB_FN (TIFFReadRGBAImage); |
| 7112 | DEF_IMGLIB_FN (TIFFClose); |
| 7113 | |
| 7114 | static int |
| 7115 | init_tiff_functions (Lisp_Object libraries) |
| 7116 | { |
| 7117 | HMODULE library; |
| 7118 | |
| 7119 | if (!(library = w32_delayed_load (libraries, Qtiff))) |
| 7120 | return 0; |
| 7121 | |
| 7122 | LOAD_IMGLIB_FN (library, TIFFSetErrorHandler); |
| 7123 | LOAD_IMGLIB_FN (library, TIFFSetWarningHandler); |
| 7124 | LOAD_IMGLIB_FN (library, TIFFOpen); |
| 7125 | LOAD_IMGLIB_FN (library, TIFFClientOpen); |
| 7126 | LOAD_IMGLIB_FN (library, TIFFGetField); |
| 7127 | LOAD_IMGLIB_FN (library, TIFFReadRGBAImage); |
| 7128 | LOAD_IMGLIB_FN (library, TIFFClose); |
| 7129 | return 1; |
| 7130 | } |
| 7131 | |
| 7132 | #else |
| 7133 | |
| 7134 | #define fn_TIFFSetErrorHandler TIFFSetErrorHandler |
| 7135 | #define fn_TIFFSetWarningHandler TIFFSetWarningHandler |
| 7136 | #define fn_TIFFOpen TIFFOpen |
| 7137 | #define fn_TIFFClientOpen TIFFClientOpen |
| 7138 | #define fn_TIFFGetField TIFFGetField |
| 7139 | #define fn_TIFFReadRGBAImage TIFFReadRGBAImage |
| 7140 | #define fn_TIFFClose TIFFClose |
| 7141 | |
| 7142 | #endif /* HAVE_NTGUI */ |
| 7143 | |
| 7144 | |
| 7145 | /* Reading from a memory buffer for TIFF images Based on the PNG |
| 7146 | memory source, but we have to provide a lot of extra functions. |
| 7147 | Blah. |
| 7148 | |
| 7149 | We really only need to implement read and seek, but I am not |
| 7150 | convinced that the TIFF library is smart enough not to destroy |
| 7151 | itself if we only hand it the function pointers we need to |
| 7152 | override. */ |
| 7153 | |
| 7154 | typedef struct |
| 7155 | { |
| 7156 | unsigned char *bytes; |
| 7157 | size_t len; |
| 7158 | int index; |
| 7159 | } |
| 7160 | tiff_memory_source; |
| 7161 | |
| 7162 | static size_t |
| 7163 | tiff_read_from_memory (data, buf, size) |
| 7164 | thandle_t data; |
| 7165 | tdata_t buf; |
| 7166 | tsize_t size; |
| 7167 | { |
| 7168 | tiff_memory_source *src = (tiff_memory_source *) data; |
| 7169 | |
| 7170 | if (size > src->len - src->index) |
| 7171 | return (size_t) -1; |
| 7172 | bcopy (src->bytes + src->index, buf, size); |
| 7173 | src->index += size; |
| 7174 | return size; |
| 7175 | } |
| 7176 | |
| 7177 | static size_t |
| 7178 | tiff_write_from_memory (data, buf, size) |
| 7179 | thandle_t data; |
| 7180 | tdata_t buf; |
| 7181 | tsize_t size; |
| 7182 | { |
| 7183 | return (size_t) -1; |
| 7184 | } |
| 7185 | |
| 7186 | static toff_t |
| 7187 | tiff_seek_in_memory (data, off, whence) |
| 7188 | thandle_t data; |
| 7189 | toff_t off; |
| 7190 | int whence; |
| 7191 | { |
| 7192 | tiff_memory_source *src = (tiff_memory_source *) data; |
| 7193 | int idx; |
| 7194 | |
| 7195 | switch (whence) |
| 7196 | { |
| 7197 | case SEEK_SET: /* Go from beginning of source. */ |
| 7198 | idx = off; |
| 7199 | break; |
| 7200 | |
| 7201 | case SEEK_END: /* Go from end of source. */ |
| 7202 | idx = src->len + off; |
| 7203 | break; |
| 7204 | |
| 7205 | case SEEK_CUR: /* Go from current position. */ |
| 7206 | idx = src->index + off; |
| 7207 | break; |
| 7208 | |
| 7209 | default: /* Invalid `whence'. */ |
| 7210 | return -1; |
| 7211 | } |
| 7212 | |
| 7213 | if (idx > src->len || idx < 0) |
| 7214 | return -1; |
| 7215 | |
| 7216 | src->index = idx; |
| 7217 | return src->index; |
| 7218 | } |
| 7219 | |
| 7220 | static int |
| 7221 | tiff_close_memory (data) |
| 7222 | thandle_t data; |
| 7223 | { |
| 7224 | /* NOOP */ |
| 7225 | return 0; |
| 7226 | } |
| 7227 | |
| 7228 | static int |
| 7229 | tiff_mmap_memory (data, pbase, psize) |
| 7230 | thandle_t data; |
| 7231 | tdata_t *pbase; |
| 7232 | toff_t *psize; |
| 7233 | { |
| 7234 | /* It is already _IN_ memory. */ |
| 7235 | return 0; |
| 7236 | } |
| 7237 | |
| 7238 | static void |
| 7239 | tiff_unmap_memory (data, base, size) |
| 7240 | thandle_t data; |
| 7241 | tdata_t base; |
| 7242 | toff_t size; |
| 7243 | { |
| 7244 | /* We don't need to do this. */ |
| 7245 | } |
| 7246 | |
| 7247 | static toff_t |
| 7248 | tiff_size_of_memory (data) |
| 7249 | thandle_t data; |
| 7250 | { |
| 7251 | return ((tiff_memory_source *) data)->len; |
| 7252 | } |
| 7253 | |
| 7254 | |
| 7255 | static void |
| 7256 | tiff_error_handler (title, format, ap) |
| 7257 | const char *title, *format; |
| 7258 | va_list ap; |
| 7259 | { |
| 7260 | char buf[512]; |
| 7261 | int len; |
| 7262 | |
| 7263 | len = sprintf (buf, "TIFF error: %s ", title); |
| 7264 | vsprintf (buf + len, format, ap); |
| 7265 | add_to_log (buf, Qnil, Qnil); |
| 7266 | } |
| 7267 | |
| 7268 | |
| 7269 | static void |
| 7270 | tiff_warning_handler (title, format, ap) |
| 7271 | const char *title, *format; |
| 7272 | va_list ap; |
| 7273 | { |
| 7274 | char buf[512]; |
| 7275 | int len; |
| 7276 | |
| 7277 | len = sprintf (buf, "TIFF warning: %s ", title); |
| 7278 | vsprintf (buf + len, format, ap); |
| 7279 | add_to_log (buf, Qnil, Qnil); |
| 7280 | } |
| 7281 | |
| 7282 | |
| 7283 | /* Load TIFF image IMG for use on frame F. Value is non-zero if |
| 7284 | successful. */ |
| 7285 | |
| 7286 | static int |
| 7287 | tiff_load (f, img) |
| 7288 | struct frame *f; |
| 7289 | struct image *img; |
| 7290 | { |
| 7291 | Lisp_Object file, specified_file; |
| 7292 | Lisp_Object specified_data; |
| 7293 | TIFF *tiff; |
| 7294 | int width, height, x, y; |
| 7295 | uint32 *buf; |
| 7296 | int rc; |
| 7297 | XImagePtr ximg; |
| 7298 | struct gcpro gcpro1; |
| 7299 | tiff_memory_source memsrc; |
| 7300 | |
| 7301 | specified_file = image_spec_value (img->spec, QCfile, NULL); |
| 7302 | specified_data = image_spec_value (img->spec, QCdata, NULL); |
| 7303 | file = Qnil; |
| 7304 | GCPRO1 (file); |
| 7305 | |
| 7306 | fn_TIFFSetErrorHandler (tiff_error_handler); |
| 7307 | fn_TIFFSetWarningHandler (tiff_warning_handler); |
| 7308 | |
| 7309 | if (NILP (specified_data)) |
| 7310 | { |
| 7311 | /* Read from a file */ |
| 7312 | file = x_find_image_file (specified_file); |
| 7313 | if (!STRINGP (file)) |
| 7314 | { |
| 7315 | image_error ("Cannot find image file `%s'", specified_file, Qnil); |
| 7316 | UNGCPRO; |
| 7317 | return 0; |
| 7318 | } |
| 7319 | |
| 7320 | /* Try to open the image file. Casting return value avoids a |
| 7321 | GCC warning on W32. */ |
| 7322 | tiff = (TIFF *)fn_TIFFOpen (SDATA (file), "r"); |
| 7323 | if (tiff == NULL) |
| 7324 | { |
| 7325 | image_error ("Cannot open `%s'", file, Qnil); |
| 7326 | UNGCPRO; |
| 7327 | return 0; |
| 7328 | } |
| 7329 | } |
| 7330 | else |
| 7331 | { |
| 7332 | /* Memory source! */ |
| 7333 | memsrc.bytes = SDATA (specified_data); |
| 7334 | memsrc.len = SBYTES (specified_data); |
| 7335 | memsrc.index = 0; |
| 7336 | |
| 7337 | /* Casting return value avoids a GCC warning on W32. */ |
| 7338 | tiff = (TIFF *)fn_TIFFClientOpen ("memory_source", "r", &memsrc, |
| 7339 | (TIFFReadWriteProc) tiff_read_from_memory, |
| 7340 | (TIFFReadWriteProc) tiff_write_from_memory, |
| 7341 | tiff_seek_in_memory, |
| 7342 | tiff_close_memory, |
| 7343 | tiff_size_of_memory, |
| 7344 | tiff_mmap_memory, |
| 7345 | tiff_unmap_memory); |
| 7346 | |
| 7347 | if (!tiff) |
| 7348 | { |
| 7349 | image_error ("Cannot open memory source for `%s'", img->spec, Qnil); |
| 7350 | UNGCPRO; |
| 7351 | return 0; |
| 7352 | } |
| 7353 | } |
| 7354 | |
| 7355 | /* Get width and height of the image, and allocate a raster buffer |
| 7356 | of width x height 32-bit values. */ |
| 7357 | fn_TIFFGetField (tiff, TIFFTAG_IMAGEWIDTH, &width); |
| 7358 | fn_TIFFGetField (tiff, TIFFTAG_IMAGELENGTH, &height); |
| 7359 | |
| 7360 | if (!check_image_size (f, width, height)) |
| 7361 | { |
| 7362 | image_error ("Invalid image size", Qnil, Qnil); |
| 7363 | UNGCPRO; |
| 7364 | return 0; |
| 7365 | } |
| 7366 | |
| 7367 | buf = (uint32 *) xmalloc (width * height * sizeof *buf); |
| 7368 | |
| 7369 | rc = fn_TIFFReadRGBAImage (tiff, width, height, buf, 0); |
| 7370 | fn_TIFFClose (tiff); |
| 7371 | if (!rc) |
| 7372 | { |
| 7373 | image_error ("Error reading TIFF image `%s'", img->spec, Qnil); |
| 7374 | xfree (buf); |
| 7375 | UNGCPRO; |
| 7376 | return 0; |
| 7377 | } |
| 7378 | |
| 7379 | /* Create the X image and pixmap. */ |
| 7380 | if (!x_create_x_image_and_pixmap (f, width, height, 0, &ximg, &img->pixmap)) |
| 7381 | { |
| 7382 | xfree (buf); |
| 7383 | UNGCPRO; |
| 7384 | return 0; |
| 7385 | } |
| 7386 | |
| 7387 | /* Initialize the color table. */ |
| 7388 | init_color_table (); |
| 7389 | |
| 7390 | /* Process the pixel raster. Origin is in the lower-left corner. */ |
| 7391 | for (y = 0; y < height; ++y) |
| 7392 | { |
| 7393 | uint32 *row = buf + y * width; |
| 7394 | |
| 7395 | for (x = 0; x < width; ++x) |
| 7396 | { |
| 7397 | uint32 abgr = row[x]; |
| 7398 | int r = TIFFGetR (abgr) << 8; |
| 7399 | int g = TIFFGetG (abgr) << 8; |
| 7400 | int b = TIFFGetB (abgr) << 8; |
| 7401 | XPutPixel (ximg, x, height - 1 - y, lookup_rgb_color (f, r, g, b)); |
| 7402 | } |
| 7403 | } |
| 7404 | |
| 7405 | #ifdef COLOR_TABLE_SUPPORT |
| 7406 | /* Remember the colors allocated for the image. Free the color table. */ |
| 7407 | img->colors = colors_in_color_table (&img->ncolors); |
| 7408 | free_color_table (); |
| 7409 | #endif /* COLOR_TABLE_SUPPORT */ |
| 7410 | |
| 7411 | img->width = width; |
| 7412 | img->height = height; |
| 7413 | |
| 7414 | /* Maybe fill in the background field while we have ximg handy. */ |
| 7415 | if (NILP (image_spec_value (img->spec, QCbackground, NULL))) |
| 7416 | /* Casting avoids a GCC warning on W32. */ |
| 7417 | IMAGE_BACKGROUND (img, f, (XImagePtr_or_DC)ximg); |
| 7418 | |
| 7419 | /* Put the image into the pixmap, then free the X image and its buffer. */ |
| 7420 | x_put_x_image (f, ximg, img->pixmap, width, height); |
| 7421 | x_destroy_x_image (ximg); |
| 7422 | xfree (buf); |
| 7423 | |
| 7424 | UNGCPRO; |
| 7425 | return 1; |
| 7426 | } |
| 7427 | |
| 7428 | #else /* HAVE_TIFF */ |
| 7429 | |
| 7430 | #ifdef MAC_OS |
| 7431 | static int |
| 7432 | tiff_load (f, img) |
| 7433 | struct frame *f; |
| 7434 | struct image *img; |
| 7435 | { |
| 7436 | return image_load_quicktime (f, img, kQTFileTypeTIFF); |
| 7437 | } |
| 7438 | #endif /* MAC_OS */ |
| 7439 | |
| 7440 | #endif /* !HAVE_TIFF */ |
| 7441 | |
| 7442 | |
| 7443 | \f |
| 7444 | /*********************************************************************** |
| 7445 | GIF |
| 7446 | ***********************************************************************/ |
| 7447 | |
| 7448 | #if defined (HAVE_GIF) || defined (MAC_OS) |
| 7449 | |
| 7450 | static int gif_image_p P_ ((Lisp_Object object)); |
| 7451 | static int gif_load P_ ((struct frame *f, struct image *img)); |
| 7452 | |
| 7453 | /* The symbol `gif' identifying images of this type. */ |
| 7454 | |
| 7455 | Lisp_Object Qgif; |
| 7456 | |
| 7457 | /* Indices of image specification fields in gif_format, below. */ |
| 7458 | |
| 7459 | enum gif_keyword_index |
| 7460 | { |
| 7461 | GIF_TYPE, |
| 7462 | GIF_DATA, |
| 7463 | GIF_FILE, |
| 7464 | GIF_ASCENT, |
| 7465 | GIF_MARGIN, |
| 7466 | GIF_RELIEF, |
| 7467 | GIF_ALGORITHM, |
| 7468 | GIF_HEURISTIC_MASK, |
| 7469 | GIF_MASK, |
| 7470 | GIF_IMAGE, |
| 7471 | GIF_BACKGROUND, |
| 7472 | GIF_LAST |
| 7473 | }; |
| 7474 | |
| 7475 | /* Vector of image_keyword structures describing the format |
| 7476 | of valid user-defined image specifications. */ |
| 7477 | |
| 7478 | static struct image_keyword gif_format[GIF_LAST] = |
| 7479 | { |
| 7480 | {":type", IMAGE_SYMBOL_VALUE, 1}, |
| 7481 | {":data", IMAGE_STRING_VALUE, 0}, |
| 7482 | {":file", IMAGE_STRING_VALUE, 0}, |
| 7483 | {":ascent", IMAGE_ASCENT_VALUE, 0}, |
| 7484 | {":margin", IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR, 0}, |
| 7485 | {":relief", IMAGE_INTEGER_VALUE, 0}, |
| 7486 | {":conversion", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, |
| 7487 | {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, |
| 7488 | {":mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, |
| 7489 | {":image", IMAGE_NON_NEGATIVE_INTEGER_VALUE, 0}, |
| 7490 | {":background", IMAGE_STRING_OR_NIL_VALUE, 0} |
| 7491 | }; |
| 7492 | |
| 7493 | /* Structure describing the image type `gif'. */ |
| 7494 | |
| 7495 | static struct image_type gif_type = |
| 7496 | { |
| 7497 | &Qgif, |
| 7498 | gif_image_p, |
| 7499 | gif_load, |
| 7500 | x_clear_image, |
| 7501 | NULL |
| 7502 | }; |
| 7503 | |
| 7504 | /* Return non-zero if OBJECT is a valid GIF image specification. */ |
| 7505 | |
| 7506 | static int |
| 7507 | gif_image_p (object) |
| 7508 | Lisp_Object object; |
| 7509 | { |
| 7510 | struct image_keyword fmt[GIF_LAST]; |
| 7511 | bcopy (gif_format, fmt, sizeof fmt); |
| 7512 | |
| 7513 | if (!parse_image_spec (object, fmt, GIF_LAST, Qgif)) |
| 7514 | return 0; |
| 7515 | |
| 7516 | /* Must specify either the :data or :file keyword. */ |
| 7517 | return fmt[GIF_FILE].count + fmt[GIF_DATA].count == 1; |
| 7518 | } |
| 7519 | |
| 7520 | #endif /* HAVE_GIF || MAC_OS */ |
| 7521 | |
| 7522 | #ifdef HAVE_GIF |
| 7523 | |
| 7524 | #if defined (HAVE_NTGUI) || defined (MAC_OS) |
| 7525 | /* winuser.h might define DrawText to DrawTextA or DrawTextW. |
| 7526 | Undefine before redefining to avoid a preprocessor warning. */ |
| 7527 | #ifdef DrawText |
| 7528 | #undef DrawText |
| 7529 | #endif |
| 7530 | /* avoid conflict with QuickdrawText.h */ |
| 7531 | #define DrawText gif_DrawText |
| 7532 | #include <gif_lib.h> |
| 7533 | #undef DrawText |
| 7534 | |
| 7535 | #else /* HAVE_NTGUI || MAC_OS */ |
| 7536 | |
| 7537 | #include <gif_lib.h> |
| 7538 | |
| 7539 | #endif /* HAVE_NTGUI || MAC_OS */ |
| 7540 | |
| 7541 | |
| 7542 | #ifdef HAVE_NTGUI |
| 7543 | |
| 7544 | /* GIF library details. */ |
| 7545 | DEF_IMGLIB_FN (DGifCloseFile); |
| 7546 | DEF_IMGLIB_FN (DGifSlurp); |
| 7547 | DEF_IMGLIB_FN (DGifOpen); |
| 7548 | DEF_IMGLIB_FN (DGifOpenFileName); |
| 7549 | |
| 7550 | static int |
| 7551 | init_gif_functions (Lisp_Object libraries) |
| 7552 | { |
| 7553 | HMODULE library; |
| 7554 | |
| 7555 | if (!(library = w32_delayed_load (libraries, Qgif))) |
| 7556 | return 0; |
| 7557 | |
| 7558 | LOAD_IMGLIB_FN (library, DGifCloseFile); |
| 7559 | LOAD_IMGLIB_FN (library, DGifSlurp); |
| 7560 | LOAD_IMGLIB_FN (library, DGifOpen); |
| 7561 | LOAD_IMGLIB_FN (library, DGifOpenFileName); |
| 7562 | return 1; |
| 7563 | } |
| 7564 | |
| 7565 | #else |
| 7566 | |
| 7567 | #define fn_DGifCloseFile DGifCloseFile |
| 7568 | #define fn_DGifSlurp DGifSlurp |
| 7569 | #define fn_DGifOpen DGifOpen |
| 7570 | #define fn_DGifOpenFileName DGifOpenFileName |
| 7571 | |
| 7572 | #endif /* HAVE_NTGUI */ |
| 7573 | |
| 7574 | /* Reading a GIF image from memory |
| 7575 | Based on the PNG memory stuff to a certain extent. */ |
| 7576 | |
| 7577 | typedef struct |
| 7578 | { |
| 7579 | unsigned char *bytes; |
| 7580 | size_t len; |
| 7581 | int index; |
| 7582 | } |
| 7583 | gif_memory_source; |
| 7584 | |
| 7585 | /* Make the current memory source available to gif_read_from_memory. |
| 7586 | It's done this way because not all versions of libungif support |
| 7587 | a UserData field in the GifFileType structure. */ |
| 7588 | static gif_memory_source *current_gif_memory_src; |
| 7589 | |
| 7590 | static int |
| 7591 | gif_read_from_memory (file, buf, len) |
| 7592 | GifFileType *file; |
| 7593 | GifByteType *buf; |
| 7594 | int len; |
| 7595 | { |
| 7596 | gif_memory_source *src = current_gif_memory_src; |
| 7597 | |
| 7598 | if (len > src->len - src->index) |
| 7599 | return -1; |
| 7600 | |
| 7601 | bcopy (src->bytes + src->index, buf, len); |
| 7602 | src->index += len; |
| 7603 | return len; |
| 7604 | } |
| 7605 | |
| 7606 | |
| 7607 | /* Load GIF image IMG for use on frame F. Value is non-zero if |
| 7608 | successful. */ |
| 7609 | |
| 7610 | static int |
| 7611 | gif_load (f, img) |
| 7612 | struct frame *f; |
| 7613 | struct image *img; |
| 7614 | { |
| 7615 | Lisp_Object file, specified_file; |
| 7616 | Lisp_Object specified_data; |
| 7617 | int rc, width, height, x, y, i; |
| 7618 | XImagePtr ximg; |
| 7619 | ColorMapObject *gif_color_map; |
| 7620 | unsigned long pixel_colors[256]; |
| 7621 | GifFileType *gif; |
| 7622 | struct gcpro gcpro1; |
| 7623 | Lisp_Object image; |
| 7624 | int ino, image_left, image_top, image_width, image_height; |
| 7625 | gif_memory_source memsrc; |
| 7626 | unsigned char *raster; |
| 7627 | |
| 7628 | specified_file = image_spec_value (img->spec, QCfile, NULL); |
| 7629 | specified_data = image_spec_value (img->spec, QCdata, NULL); |
| 7630 | file = Qnil; |
| 7631 | GCPRO1 (file); |
| 7632 | |
| 7633 | if (NILP (specified_data)) |
| 7634 | { |
| 7635 | file = x_find_image_file (specified_file); |
| 7636 | if (!STRINGP (file)) |
| 7637 | { |
| 7638 | image_error ("Cannot find image file `%s'", specified_file, Qnil); |
| 7639 | UNGCPRO; |
| 7640 | return 0; |
| 7641 | } |
| 7642 | |
| 7643 | /* Open the GIF file. Casting return value avoids a GCC warning |
| 7644 | on W32. */ |
| 7645 | gif = (GifFileType *)fn_DGifOpenFileName (SDATA (file)); |
| 7646 | if (gif == NULL) |
| 7647 | { |
| 7648 | image_error ("Cannot open `%s'", file, Qnil); |
| 7649 | UNGCPRO; |
| 7650 | return 0; |
| 7651 | } |
| 7652 | } |
| 7653 | else |
| 7654 | { |
| 7655 | /* Read from memory! */ |
| 7656 | current_gif_memory_src = &memsrc; |
| 7657 | memsrc.bytes = SDATA (specified_data); |
| 7658 | memsrc.len = SBYTES (specified_data); |
| 7659 | memsrc.index = 0; |
| 7660 | |
| 7661 | /* Casting return value avoids a GCC warning on W32. */ |
| 7662 | gif = (GifFileType *)fn_DGifOpen(&memsrc, gif_read_from_memory); |
| 7663 | if (!gif) |
| 7664 | { |
| 7665 | image_error ("Cannot open memory source `%s'", img->spec, Qnil); |
| 7666 | UNGCPRO; |
| 7667 | return 0; |
| 7668 | } |
| 7669 | } |
| 7670 | |
| 7671 | /* Before reading entire contents, check the declared image size. */ |
| 7672 | if (!check_image_size (f, gif->SWidth, gif->SHeight)) |
| 7673 | { |
| 7674 | image_error ("Invalid image size", Qnil, Qnil); |
| 7675 | fn_DGifCloseFile (gif); |
| 7676 | UNGCPRO; |
| 7677 | return 0; |
| 7678 | } |
| 7679 | |
| 7680 | /* Read entire contents. */ |
| 7681 | rc = fn_DGifSlurp (gif); |
| 7682 | if (rc == GIF_ERROR) |
| 7683 | { |
| 7684 | image_error ("Error reading `%s'", img->spec, Qnil); |
| 7685 | fn_DGifCloseFile (gif); |
| 7686 | UNGCPRO; |
| 7687 | return 0; |
| 7688 | } |
| 7689 | |
| 7690 | image = image_spec_value (img->spec, QCindex, NULL); |
| 7691 | ino = INTEGERP (image) ? XFASTINT (image) : 0; |
| 7692 | if (ino >= gif->ImageCount) |
| 7693 | { |
| 7694 | image_error ("Invalid image number `%s' in image `%s'", |
| 7695 | image, img->spec); |
| 7696 | fn_DGifCloseFile (gif); |
| 7697 | UNGCPRO; |
| 7698 | return 0; |
| 7699 | } |
| 7700 | |
| 7701 | image_top = gif->SavedImages[ino].ImageDesc.Top; |
| 7702 | image_left = gif->SavedImages[ino].ImageDesc.Left; |
| 7703 | image_width = gif->SavedImages[ino].ImageDesc.Width; |
| 7704 | image_height = gif->SavedImages[ino].ImageDesc.Height; |
| 7705 | |
| 7706 | width = img->width = max (gif->SWidth, |
| 7707 | max (gif->Image.Left + gif->Image.Width, |
| 7708 | image_left + image_width)); |
| 7709 | height = img->height = max (gif->SHeight, |
| 7710 | max (gif->Image.Top + gif->Image.Height, |
| 7711 | image_top + image_height)); |
| 7712 | |
| 7713 | if (!check_image_size (f, width, height)) |
| 7714 | { |
| 7715 | image_error ("Invalid image size", Qnil, Qnil); |
| 7716 | fn_DGifCloseFile (gif); |
| 7717 | UNGCPRO; |
| 7718 | return 0; |
| 7719 | } |
| 7720 | |
| 7721 | /* Create the X image and pixmap. */ |
| 7722 | if (!x_create_x_image_and_pixmap (f, width, height, 0, &ximg, &img->pixmap)) |
| 7723 | { |
| 7724 | fn_DGifCloseFile (gif); |
| 7725 | UNGCPRO; |
| 7726 | return 0; |
| 7727 | } |
| 7728 | |
| 7729 | /* Allocate colors. */ |
| 7730 | gif_color_map = gif->SavedImages[ino].ImageDesc.ColorMap; |
| 7731 | if (!gif_color_map) |
| 7732 | gif_color_map = gif->SColorMap; |
| 7733 | init_color_table (); |
| 7734 | bzero (pixel_colors, sizeof pixel_colors); |
| 7735 | |
| 7736 | for (i = 0; i < gif_color_map->ColorCount; ++i) |
| 7737 | { |
| 7738 | int r = gif_color_map->Colors[i].Red << 8; |
| 7739 | int g = gif_color_map->Colors[i].Green << 8; |
| 7740 | int b = gif_color_map->Colors[i].Blue << 8; |
| 7741 | pixel_colors[i] = lookup_rgb_color (f, r, g, b); |
| 7742 | } |
| 7743 | |
| 7744 | #ifdef COLOR_TABLE_SUPPORT |
| 7745 | img->colors = colors_in_color_table (&img->ncolors); |
| 7746 | free_color_table (); |
| 7747 | #endif /* COLOR_TABLE_SUPPORT */ |
| 7748 | |
| 7749 | /* Clear the part of the screen image that are not covered by |
| 7750 | the image from the GIF file. Full animated GIF support |
| 7751 | requires more than can be done here (see the gif89 spec, |
| 7752 | disposal methods). Let's simply assume that the part |
| 7753 | not covered by a sub-image is in the frame's background color. */ |
| 7754 | for (y = 0; y < image_top; ++y) |
| 7755 | for (x = 0; x < width; ++x) |
| 7756 | XPutPixel (ximg, x, y, FRAME_BACKGROUND_PIXEL (f)); |
| 7757 | |
| 7758 | for (y = image_top + image_height; y < height; ++y) |
| 7759 | for (x = 0; x < width; ++x) |
| 7760 | XPutPixel (ximg, x, y, FRAME_BACKGROUND_PIXEL (f)); |
| 7761 | |
| 7762 | for (y = image_top; y < image_top + image_height; ++y) |
| 7763 | { |
| 7764 | for (x = 0; x < image_left; ++x) |
| 7765 | XPutPixel (ximg, x, y, FRAME_BACKGROUND_PIXEL (f)); |
| 7766 | for (x = image_left + image_width; x < width; ++x) |
| 7767 | XPutPixel (ximg, x, y, FRAME_BACKGROUND_PIXEL (f)); |
| 7768 | } |
| 7769 | |
| 7770 | /* Read the GIF image into the X image. We use a local variable |
| 7771 | `raster' here because RasterBits below is a char *, and invites |
| 7772 | problems with bytes >= 0x80. */ |
| 7773 | raster = (unsigned char *) gif->SavedImages[ino].RasterBits; |
| 7774 | |
| 7775 | if (gif->SavedImages[ino].ImageDesc.Interlace) |
| 7776 | { |
| 7777 | static int interlace_start[] = {0, 4, 2, 1}; |
| 7778 | static int interlace_increment[] = {8, 8, 4, 2}; |
| 7779 | int pass; |
| 7780 | int row = interlace_start[0]; |
| 7781 | |
| 7782 | pass = 0; |
| 7783 | |
| 7784 | for (y = 0; y < image_height; y++) |
| 7785 | { |
| 7786 | if (row >= image_height) |
| 7787 | { |
| 7788 | row = interlace_start[++pass]; |
| 7789 | while (row >= image_height) |
| 7790 | row = interlace_start[++pass]; |
| 7791 | } |
| 7792 | |
| 7793 | for (x = 0; x < image_width; x++) |
| 7794 | { |
| 7795 | int i = raster[(y * image_width) + x]; |
| 7796 | XPutPixel (ximg, x + image_left, row + image_top, |
| 7797 | pixel_colors[i]); |
| 7798 | } |
| 7799 | |
| 7800 | row += interlace_increment[pass]; |
| 7801 | } |
| 7802 | } |
| 7803 | else |
| 7804 | { |
| 7805 | for (y = 0; y < image_height; ++y) |
| 7806 | for (x = 0; x < image_width; ++x) |
| 7807 | { |
| 7808 | int i = raster[y * image_width + x]; |
| 7809 | XPutPixel (ximg, x + image_left, y + image_top, pixel_colors[i]); |
| 7810 | } |
| 7811 | } |
| 7812 | |
| 7813 | fn_DGifCloseFile (gif); |
| 7814 | |
| 7815 | /* Maybe fill in the background field while we have ximg handy. */ |
| 7816 | if (NILP (image_spec_value (img->spec, QCbackground, NULL))) |
| 7817 | /* Casting avoids a GCC warning. */ |
| 7818 | IMAGE_BACKGROUND (img, f, (XImagePtr_or_DC)ximg); |
| 7819 | |
| 7820 | /* Put the image into the pixmap, then free the X image and its buffer. */ |
| 7821 | x_put_x_image (f, ximg, img->pixmap, width, height); |
| 7822 | x_destroy_x_image (ximg); |
| 7823 | |
| 7824 | UNGCPRO; |
| 7825 | return 1; |
| 7826 | } |
| 7827 | |
| 7828 | #else /* !HAVE_GIF */ |
| 7829 | |
| 7830 | #ifdef MAC_OS |
| 7831 | static int |
| 7832 | gif_load (f, img) |
| 7833 | struct frame *f; |
| 7834 | struct image *img; |
| 7835 | { |
| 7836 | Lisp_Object specified_file, file; |
| 7837 | Lisp_Object specified_data; |
| 7838 | OSErr err; |
| 7839 | Boolean graphic_p, movie_p, prefer_graphic_p; |
| 7840 | Handle dh = NULL; |
| 7841 | Movie movie = NULL; |
| 7842 | Lisp_Object image; |
| 7843 | Track track = NULL; |
| 7844 | Media media = NULL; |
| 7845 | long nsamples; |
| 7846 | Rect rect; |
| 7847 | Lisp_Object specified_bg; |
| 7848 | XColor color; |
| 7849 | RGBColor bg_color; |
| 7850 | int width, height; |
| 7851 | XImagePtr ximg; |
| 7852 | TimeValue time; |
| 7853 | int ino; |
| 7854 | CGrafPtr old_port; |
| 7855 | GDHandle old_gdh; |
| 7856 | |
| 7857 | specified_file = image_spec_value (img->spec, QCfile, NULL); |
| 7858 | specified_data = image_spec_value (img->spec, QCdata, NULL); |
| 7859 | |
| 7860 | /* Animated gifs use QuickTime Movie Toolbox. So initialize it here. */ |
| 7861 | EnterMovies (); |
| 7862 | |
| 7863 | if (NILP (specified_data)) |
| 7864 | { |
| 7865 | /* Read from a file */ |
| 7866 | FSSpec fss; |
| 7867 | short refnum; |
| 7868 | |
| 7869 | err = find_image_fsspec (specified_file, &file, &fss); |
| 7870 | if (err != noErr) |
| 7871 | { |
| 7872 | if (err == fnfErr) |
| 7873 | image_error ("Cannot find image file `%s'", specified_file, Qnil); |
| 7874 | else |
| 7875 | goto open_error; |
| 7876 | } |
| 7877 | |
| 7878 | err = CanQuickTimeOpenFile (&fss, kQTFileTypeGIF, 0, |
| 7879 | &graphic_p, &movie_p, &prefer_graphic_p, 0); |
| 7880 | if (err != noErr) |
| 7881 | goto open_error; |
| 7882 | |
| 7883 | if (!graphic_p && !movie_p) |
| 7884 | goto open_error; |
| 7885 | if (prefer_graphic_p) |
| 7886 | return image_load_qt_1 (f, img, kQTFileTypeGIF, &fss, NULL); |
| 7887 | err = OpenMovieFile (&fss, &refnum, fsRdPerm); |
| 7888 | if (err != noErr) |
| 7889 | goto open_error; |
| 7890 | err = NewMovieFromFile (&movie, refnum, NULL, NULL, 0, NULL); |
| 7891 | CloseMovieFile (refnum); |
| 7892 | if (err != noErr) |
| 7893 | { |
| 7894 | image_error ("Error reading `%s'", file, Qnil); |
| 7895 | return 0; |
| 7896 | } |
| 7897 | } |
| 7898 | else |
| 7899 | { |
| 7900 | /* Memory source! */ |
| 7901 | Handle dref = NULL; |
| 7902 | long file_type_atom[3]; |
| 7903 | |
| 7904 | err = PtrToHand (SDATA (specified_data), &dh, SBYTES (specified_data)); |
| 7905 | if (err != noErr) |
| 7906 | { |
| 7907 | image_error ("Cannot allocate data handle for `%s'", |
| 7908 | img->spec, Qnil); |
| 7909 | goto error; |
| 7910 | } |
| 7911 | |
| 7912 | file_type_atom[0] = EndianU32_NtoB (sizeof (long) * 3); |
| 7913 | file_type_atom[1] = EndianU32_NtoB (kDataRefExtensionMacOSFileType); |
| 7914 | file_type_atom[2] = EndianU32_NtoB (kQTFileTypeGIF); |
| 7915 | err = PtrToHand (&dh, &dref, sizeof (Handle)); |
| 7916 | if (err == noErr) |
| 7917 | /* no file name */ |
| 7918 | err = PtrAndHand ("\p", dref, 1); |
| 7919 | if (err == noErr) |
| 7920 | err = PtrAndHand (file_type_atom, dref, sizeof (long) * 3); |
| 7921 | if (err != noErr) |
| 7922 | { |
| 7923 | image_error ("Cannot allocate handle data ref for `%s'", img->spec, Qnil); |
| 7924 | goto error; |
| 7925 | } |
| 7926 | err = CanQuickTimeOpenDataRef (dref, HandleDataHandlerSubType, &graphic_p, |
| 7927 | &movie_p, &prefer_graphic_p, 0); |
| 7928 | if (err != noErr) |
| 7929 | goto open_error; |
| 7930 | |
| 7931 | if (!graphic_p && !movie_p) |
| 7932 | goto open_error; |
| 7933 | if (prefer_graphic_p) |
| 7934 | { |
| 7935 | int success_p; |
| 7936 | |
| 7937 | DisposeHandle (dref); |
| 7938 | success_p = image_load_qt_1 (f, img, kQTFileTypeGIF, NULL, dh); |
| 7939 | DisposeHandle (dh); |
| 7940 | return success_p; |
| 7941 | } |
| 7942 | err = NewMovieFromDataRef (&movie, 0, NULL, dref, |
| 7943 | HandleDataHandlerSubType); |
| 7944 | DisposeHandle (dref); |
| 7945 | if (err != noErr) |
| 7946 | goto open_error; |
| 7947 | } |
| 7948 | |
| 7949 | image = image_spec_value (img->spec, QCindex, NULL); |
| 7950 | ino = INTEGERP (image) ? XFASTINT (image) : 0; |
| 7951 | track = GetMovieIndTrack (movie, 1); |
| 7952 | media = GetTrackMedia (track); |
| 7953 | nsamples = GetMediaSampleCount (media); |
| 7954 | if (ino >= nsamples) |
| 7955 | { |
| 7956 | image_error ("Invalid image number `%s' in image `%s'", |
| 7957 | image, img->spec); |
| 7958 | goto error; |
| 7959 | } |
| 7960 | |
| 7961 | specified_bg = image_spec_value (img->spec, QCbackground, NULL); |
| 7962 | if (!STRINGP (specified_bg) || |
| 7963 | !mac_defined_color (f, SDATA (specified_bg), &color, 0)) |
| 7964 | { |
| 7965 | color.pixel = FRAME_BACKGROUND_PIXEL (f); |
| 7966 | color.red = RED16_FROM_ULONG (color.pixel); |
| 7967 | color.green = GREEN16_FROM_ULONG (color.pixel); |
| 7968 | color.blue = BLUE16_FROM_ULONG (color.pixel); |
| 7969 | } |
| 7970 | GetMovieBox (movie, &rect); |
| 7971 | width = img->width = rect.right - rect.left; |
| 7972 | height = img->height = rect.bottom - rect.top; |
| 7973 | if (!x_create_x_image_and_pixmap (f, width, height, 0, &ximg, &img->pixmap)) |
| 7974 | goto error; |
| 7975 | |
| 7976 | GetGWorld (&old_port, &old_gdh); |
| 7977 | SetGWorld (ximg, NULL); |
| 7978 | bg_color.red = color.red; |
| 7979 | bg_color.green = color.green; |
| 7980 | bg_color.blue = color.blue; |
| 7981 | RGBBackColor (&bg_color); |
| 7982 | SetGWorld (old_port, old_gdh); |
| 7983 | SetMovieActive (movie, 1); |
| 7984 | SetMovieGWorld (movie, ximg, NULL); |
| 7985 | SampleNumToMediaTime (media, ino + 1, &time, NULL); |
| 7986 | SetMovieTimeValue (movie, time); |
| 7987 | MoviesTask (movie, 0L); |
| 7988 | DisposeTrackMedia (media); |
| 7989 | DisposeMovieTrack (track); |
| 7990 | DisposeMovie (movie); |
| 7991 | if (dh) |
| 7992 | DisposeHandle (dh); |
| 7993 | /* Maybe fill in the background field while we have ximg handy. */ |
| 7994 | if (NILP (image_spec_value (img->spec, QCbackground, NULL))) |
| 7995 | IMAGE_BACKGROUND (img, f, ximg); |
| 7996 | |
| 7997 | /* Put the image into the pixmap. */ |
| 7998 | x_put_x_image (f, ximg, img->pixmap, width, height); |
| 7999 | x_destroy_x_image (ximg); |
| 8000 | return 1; |
| 8001 | |
| 8002 | open_error: |
| 8003 | image_error ("Cannot open `%s'", file, Qnil); |
| 8004 | error: |
| 8005 | if (media) |
| 8006 | DisposeTrackMedia (media); |
| 8007 | if (track) |
| 8008 | DisposeMovieTrack (track); |
| 8009 | if (movie) |
| 8010 | DisposeMovie (movie); |
| 8011 | if (dh) |
| 8012 | DisposeHandle (dh); |
| 8013 | return 0; |
| 8014 | } |
| 8015 | #endif /* MAC_OS */ |
| 8016 | |
| 8017 | #endif /* HAVE_GIF */ |
| 8018 | |
| 8019 | |
| 8020 | \f |
| 8021 | /*********************************************************************** |
| 8022 | Ghostscript |
| 8023 | ***********************************************************************/ |
| 8024 | |
| 8025 | #ifdef HAVE_X_WINDOWS |
| 8026 | #define HAVE_GHOSTSCRIPT 1 |
| 8027 | #endif /* HAVE_X_WINDOWS */ |
| 8028 | |
| 8029 | /* The symbol `postscript' identifying images of this type. */ |
| 8030 | |
| 8031 | Lisp_Object Qpostscript; |
| 8032 | |
| 8033 | #ifdef HAVE_GHOSTSCRIPT |
| 8034 | |
| 8035 | static int gs_image_p P_ ((Lisp_Object object)); |
| 8036 | static int gs_load P_ ((struct frame *f, struct image *img)); |
| 8037 | static void gs_clear_image P_ ((struct frame *f, struct image *img)); |
| 8038 | |
| 8039 | /* Keyword symbols. */ |
| 8040 | |
| 8041 | Lisp_Object QCloader, QCbounding_box, QCpt_width, QCpt_height; |
| 8042 | |
| 8043 | /* Indices of image specification fields in gs_format, below. */ |
| 8044 | |
| 8045 | enum gs_keyword_index |
| 8046 | { |
| 8047 | GS_TYPE, |
| 8048 | GS_PT_WIDTH, |
| 8049 | GS_PT_HEIGHT, |
| 8050 | GS_FILE, |
| 8051 | GS_LOADER, |
| 8052 | GS_BOUNDING_BOX, |
| 8053 | GS_ASCENT, |
| 8054 | GS_MARGIN, |
| 8055 | GS_RELIEF, |
| 8056 | GS_ALGORITHM, |
| 8057 | GS_HEURISTIC_MASK, |
| 8058 | GS_MASK, |
| 8059 | GS_BACKGROUND, |
| 8060 | GS_LAST |
| 8061 | }; |
| 8062 | |
| 8063 | /* Vector of image_keyword structures describing the format |
| 8064 | of valid user-defined image specifications. */ |
| 8065 | |
| 8066 | static struct image_keyword gs_format[GS_LAST] = |
| 8067 | { |
| 8068 | {":type", IMAGE_SYMBOL_VALUE, 1}, |
| 8069 | {":pt-width", IMAGE_POSITIVE_INTEGER_VALUE, 1}, |
| 8070 | {":pt-height", IMAGE_POSITIVE_INTEGER_VALUE, 1}, |
| 8071 | {":file", IMAGE_STRING_VALUE, 1}, |
| 8072 | {":loader", IMAGE_FUNCTION_VALUE, 0}, |
| 8073 | {":bounding-box", IMAGE_DONT_CHECK_VALUE_TYPE, 1}, |
| 8074 | {":ascent", IMAGE_ASCENT_VALUE, 0}, |
| 8075 | {":margin", IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR, 0}, |
| 8076 | {":relief", IMAGE_INTEGER_VALUE, 0}, |
| 8077 | {":conversion", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, |
| 8078 | {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, |
| 8079 | {":mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, |
| 8080 | {":background", IMAGE_STRING_OR_NIL_VALUE, 0} |
| 8081 | }; |
| 8082 | |
| 8083 | /* Structure describing the image type `ghostscript'. */ |
| 8084 | |
| 8085 | static struct image_type gs_type = |
| 8086 | { |
| 8087 | &Qpostscript, |
| 8088 | gs_image_p, |
| 8089 | gs_load, |
| 8090 | gs_clear_image, |
| 8091 | NULL |
| 8092 | }; |
| 8093 | |
| 8094 | |
| 8095 | /* Free X resources of Ghostscript image IMG which is used on frame F. */ |
| 8096 | |
| 8097 | static void |
| 8098 | gs_clear_image (f, img) |
| 8099 | struct frame *f; |
| 8100 | struct image *img; |
| 8101 | { |
| 8102 | /* IMG->data.ptr_val may contain a recorded colormap. */ |
| 8103 | xfree (img->data.ptr_val); |
| 8104 | x_clear_image (f, img); |
| 8105 | } |
| 8106 | |
| 8107 | |
| 8108 | /* Return non-zero if OBJECT is a valid Ghostscript image |
| 8109 | specification. */ |
| 8110 | |
| 8111 | static int |
| 8112 | gs_image_p (object) |
| 8113 | Lisp_Object object; |
| 8114 | { |
| 8115 | struct image_keyword fmt[GS_LAST]; |
| 8116 | Lisp_Object tem; |
| 8117 | int i; |
| 8118 | |
| 8119 | bcopy (gs_format, fmt, sizeof fmt); |
| 8120 | |
| 8121 | if (!parse_image_spec (object, fmt, GS_LAST, Qpostscript)) |
| 8122 | return 0; |
| 8123 | |
| 8124 | /* Bounding box must be a list or vector containing 4 integers. */ |
| 8125 | tem = fmt[GS_BOUNDING_BOX].value; |
| 8126 | if (CONSP (tem)) |
| 8127 | { |
| 8128 | for (i = 0; i < 4; ++i, tem = XCDR (tem)) |
| 8129 | if (!CONSP (tem) || !INTEGERP (XCAR (tem))) |
| 8130 | return 0; |
| 8131 | if (!NILP (tem)) |
| 8132 | return 0; |
| 8133 | } |
| 8134 | else if (VECTORP (tem)) |
| 8135 | { |
| 8136 | if (XVECTOR (tem)->size != 4) |
| 8137 | return 0; |
| 8138 | for (i = 0; i < 4; ++i) |
| 8139 | if (!INTEGERP (XVECTOR (tem)->contents[i])) |
| 8140 | return 0; |
| 8141 | } |
| 8142 | else |
| 8143 | return 0; |
| 8144 | |
| 8145 | return 1; |
| 8146 | } |
| 8147 | |
| 8148 | |
| 8149 | /* Load Ghostscript image IMG for use on frame F. Value is non-zero |
| 8150 | if successful. */ |
| 8151 | |
| 8152 | static int |
| 8153 | gs_load (f, img) |
| 8154 | struct frame *f; |
| 8155 | struct image *img; |
| 8156 | { |
| 8157 | char buffer[100]; |
| 8158 | Lisp_Object window_and_pixmap_id = Qnil, loader, pt_height, pt_width; |
| 8159 | struct gcpro gcpro1, gcpro2; |
| 8160 | Lisp_Object frame; |
| 8161 | double in_width, in_height; |
| 8162 | Lisp_Object pixel_colors = Qnil; |
| 8163 | |
| 8164 | /* Compute pixel size of pixmap needed from the given size in the |
| 8165 | image specification. Sizes in the specification are in pt. 1 pt |
| 8166 | = 1/72 in, xdpi and ydpi are stored in the frame's X display |
| 8167 | info. */ |
| 8168 | pt_width = image_spec_value (img->spec, QCpt_width, NULL); |
| 8169 | in_width = XFASTINT (pt_width) / 72.0; |
| 8170 | img->width = in_width * FRAME_X_DISPLAY_INFO (f)->resx; |
| 8171 | pt_height = image_spec_value (img->spec, QCpt_height, NULL); |
| 8172 | in_height = XFASTINT (pt_height) / 72.0; |
| 8173 | img->height = in_height * FRAME_X_DISPLAY_INFO (f)->resy; |
| 8174 | |
| 8175 | if (!check_image_size (f, img->width, img->height)) |
| 8176 | { |
| 8177 | image_error ("Invalid image size", Qnil, Qnil); |
| 8178 | return 0; |
| 8179 | } |
| 8180 | |
| 8181 | /* Create the pixmap. */ |
| 8182 | xassert (img->pixmap == NO_PIXMAP); |
| 8183 | |
| 8184 | /* Only W32 version did BLOCK_INPUT here. ++kfs */ |
| 8185 | BLOCK_INPUT; |
| 8186 | img->pixmap = XCreatePixmap (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), |
| 8187 | img->width, img->height, |
| 8188 | DefaultDepthOfScreen (FRAME_X_SCREEN (f))); |
| 8189 | UNBLOCK_INPUT; |
| 8190 | |
| 8191 | if (!img->pixmap) |
| 8192 | { |
| 8193 | image_error ("Unable to create pixmap for `%s'", img->spec, Qnil); |
| 8194 | return 0; |
| 8195 | } |
| 8196 | |
| 8197 | /* Call the loader to fill the pixmap. It returns a process object |
| 8198 | if successful. We do not record_unwind_protect here because |
| 8199 | other places in redisplay like calling window scroll functions |
| 8200 | don't either. Let the Lisp loader use `unwind-protect' instead. */ |
| 8201 | GCPRO2 (window_and_pixmap_id, pixel_colors); |
| 8202 | |
| 8203 | sprintf (buffer, "%lu %lu", |
| 8204 | (unsigned long) FRAME_X_WINDOW (f), |
| 8205 | (unsigned long) img->pixmap); |
| 8206 | window_and_pixmap_id = build_string (buffer); |
| 8207 | |
| 8208 | sprintf (buffer, "%lu %lu", |
| 8209 | FRAME_FOREGROUND_PIXEL (f), |
| 8210 | FRAME_BACKGROUND_PIXEL (f)); |
| 8211 | pixel_colors = build_string (buffer); |
| 8212 | |
| 8213 | XSETFRAME (frame, f); |
| 8214 | loader = image_spec_value (img->spec, QCloader, NULL); |
| 8215 | if (NILP (loader)) |
| 8216 | loader = intern ("gs-load-image"); |
| 8217 | |
| 8218 | img->data.lisp_val = call6 (loader, frame, img->spec, |
| 8219 | make_number (img->width), |
| 8220 | make_number (img->height), |
| 8221 | window_and_pixmap_id, |
| 8222 | pixel_colors); |
| 8223 | UNGCPRO; |
| 8224 | return PROCESSP (img->data.lisp_val); |
| 8225 | } |
| 8226 | |
| 8227 | |
| 8228 | /* Kill the Ghostscript process that was started to fill PIXMAP on |
| 8229 | frame F. Called from XTread_socket when receiving an event |
| 8230 | telling Emacs that Ghostscript has finished drawing. */ |
| 8231 | |
| 8232 | void |
| 8233 | x_kill_gs_process (pixmap, f) |
| 8234 | Pixmap pixmap; |
| 8235 | struct frame *f; |
| 8236 | { |
| 8237 | struct image_cache *c = FRAME_X_IMAGE_CACHE (f); |
| 8238 | int class, i; |
| 8239 | struct image *img; |
| 8240 | |
| 8241 | /* Find the image containing PIXMAP. */ |
| 8242 | for (i = 0; i < c->used; ++i) |
| 8243 | if (c->images[i]->pixmap == pixmap) |
| 8244 | break; |
| 8245 | |
| 8246 | /* Should someone in between have cleared the image cache, for |
| 8247 | instance, give up. */ |
| 8248 | if (i == c->used) |
| 8249 | return; |
| 8250 | |
| 8251 | /* Kill the GS process. We should have found PIXMAP in the image |
| 8252 | cache and its image should contain a process object. */ |
| 8253 | img = c->images[i]; |
| 8254 | xassert (PROCESSP (img->data.lisp_val)); |
| 8255 | Fkill_process (img->data.lisp_val, Qnil); |
| 8256 | img->data.lisp_val = Qnil; |
| 8257 | |
| 8258 | #if defined (HAVE_X_WINDOWS) |
| 8259 | |
| 8260 | /* On displays with a mutable colormap, figure out the colors |
| 8261 | allocated for the image by looking at the pixels of an XImage for |
| 8262 | img->pixmap. */ |
| 8263 | class = FRAME_X_VISUAL (f)->class; |
| 8264 | if (class != StaticColor && class != StaticGray && class != TrueColor) |
| 8265 | { |
| 8266 | XImagePtr ximg; |
| 8267 | |
| 8268 | BLOCK_INPUT; |
| 8269 | |
| 8270 | /* Try to get an XImage for img->pixmep. */ |
| 8271 | ximg = XGetImage (FRAME_X_DISPLAY (f), img->pixmap, |
| 8272 | 0, 0, img->width, img->height, ~0, ZPixmap); |
| 8273 | if (ximg) |
| 8274 | { |
| 8275 | int x, y; |
| 8276 | |
| 8277 | /* Initialize the color table. */ |
| 8278 | init_color_table (); |
| 8279 | |
| 8280 | /* For each pixel of the image, look its color up in the |
| 8281 | color table. After having done so, the color table will |
| 8282 | contain an entry for each color used by the image. */ |
| 8283 | for (y = 0; y < img->height; ++y) |
| 8284 | for (x = 0; x < img->width; ++x) |
| 8285 | { |
| 8286 | unsigned long pixel = XGetPixel (ximg, x, y); |
| 8287 | lookup_pixel_color (f, pixel); |
| 8288 | } |
| 8289 | |
| 8290 | /* Record colors in the image. Free color table and XImage. */ |
| 8291 | #ifdef COLOR_TABLE_SUPPORT |
| 8292 | img->colors = colors_in_color_table (&img->ncolors); |
| 8293 | free_color_table (); |
| 8294 | #endif |
| 8295 | XDestroyImage (ximg); |
| 8296 | |
| 8297 | #if 0 /* This doesn't seem to be the case. If we free the colors |
| 8298 | here, we get a BadAccess later in x_clear_image when |
| 8299 | freeing the colors. */ |
| 8300 | /* We have allocated colors once, but Ghostscript has also |
| 8301 | allocated colors on behalf of us. So, to get the |
| 8302 | reference counts right, free them once. */ |
| 8303 | if (img->ncolors) |
| 8304 | x_free_colors (f, img->colors, img->ncolors); |
| 8305 | #endif |
| 8306 | } |
| 8307 | else |
| 8308 | image_error ("Cannot get X image of `%s'; colors will not be freed", |
| 8309 | img->spec, Qnil); |
| 8310 | |
| 8311 | UNBLOCK_INPUT; |
| 8312 | } |
| 8313 | #endif /* HAVE_X_WINDOWS */ |
| 8314 | |
| 8315 | /* Now that we have the pixmap, compute mask and transform the |
| 8316 | image if requested. */ |
| 8317 | BLOCK_INPUT; |
| 8318 | postprocess_image (f, img); |
| 8319 | UNBLOCK_INPUT; |
| 8320 | } |
| 8321 | |
| 8322 | #endif /* HAVE_GHOSTSCRIPT */ |
| 8323 | |
| 8324 | \f |
| 8325 | /*********************************************************************** |
| 8326 | Tests |
| 8327 | ***********************************************************************/ |
| 8328 | |
| 8329 | #if GLYPH_DEBUG |
| 8330 | |
| 8331 | DEFUN ("imagep", Fimagep, Simagep, 1, 1, 0, |
| 8332 | doc: /* Value is non-nil if SPEC is a valid image specification. */) |
| 8333 | (spec) |
| 8334 | Lisp_Object spec; |
| 8335 | { |
| 8336 | return valid_image_p (spec) ? Qt : Qnil; |
| 8337 | } |
| 8338 | |
| 8339 | |
| 8340 | DEFUN ("lookup-image", Flookup_image, Slookup_image, 1, 1, 0, "") |
| 8341 | (spec) |
| 8342 | Lisp_Object spec; |
| 8343 | { |
| 8344 | int id = -1; |
| 8345 | |
| 8346 | if (valid_image_p (spec)) |
| 8347 | id = lookup_image (SELECTED_FRAME (), spec); |
| 8348 | |
| 8349 | debug_print (spec); |
| 8350 | return make_number (id); |
| 8351 | } |
| 8352 | |
| 8353 | #endif /* GLYPH_DEBUG != 0 */ |
| 8354 | |
| 8355 | |
| 8356 | /*********************************************************************** |
| 8357 | Initialization |
| 8358 | ***********************************************************************/ |
| 8359 | |
| 8360 | #ifdef HAVE_NTGUI |
| 8361 | /* Image types that rely on external libraries are loaded dynamically |
| 8362 | if the library is available. */ |
| 8363 | #define CHECK_LIB_AVAILABLE(image_type, init_lib_fn, libraries) \ |
| 8364 | define_image_type (image_type, init_lib_fn (libraries)) |
| 8365 | #else |
| 8366 | #define CHECK_LIB_AVAILABLE(image_type, init_lib_fn, libraries) \ |
| 8367 | define_image_type (image_type, 1) |
| 8368 | #endif /* HAVE_NTGUI */ |
| 8369 | |
| 8370 | DEFUN ("init-image-library", Finit_image_library, Sinit_image_library, 2, 2, 0, |
| 8371 | doc: /* Initialize image library implementing image type TYPE. |
| 8372 | Return non-nil if TYPE is a supported image type. |
| 8373 | |
| 8374 | Image types pbm and xbm are prebuilt; other types are loaded here. |
| 8375 | Libraries to load are specified in alist LIBRARIES (usually, the value |
| 8376 | of `image-library-alist', which see). */) |
| 8377 | (type, libraries) |
| 8378 | Lisp_Object type, libraries; |
| 8379 | { |
| 8380 | Lisp_Object tested; |
| 8381 | |
| 8382 | /* Don't try to reload the library. */ |
| 8383 | tested = Fassq (type, Vimage_type_cache); |
| 8384 | if (CONSP (tested)) |
| 8385 | return XCDR (tested); |
| 8386 | |
| 8387 | #if defined (HAVE_XPM) || defined (MAC_OS) |
| 8388 | if (EQ (type, Qxpm)) |
| 8389 | return CHECK_LIB_AVAILABLE (&xpm_type, init_xpm_functions, libraries); |
| 8390 | #endif |
| 8391 | |
| 8392 | #if defined (HAVE_JPEG) || defined (MAC_OS) |
| 8393 | if (EQ (type, Qjpeg)) |
| 8394 | return CHECK_LIB_AVAILABLE (&jpeg_type, init_jpeg_functions, libraries); |
| 8395 | #endif |
| 8396 | |
| 8397 | #if defined (HAVE_TIFF) || defined (MAC_OS) |
| 8398 | if (EQ (type, Qtiff)) |
| 8399 | return CHECK_LIB_AVAILABLE (&tiff_type, init_tiff_functions, libraries); |
| 8400 | #endif |
| 8401 | |
| 8402 | #if defined (HAVE_GIF) || defined (MAC_OS) |
| 8403 | if (EQ (type, Qgif)) |
| 8404 | return CHECK_LIB_AVAILABLE (&gif_type, init_gif_functions, libraries); |
| 8405 | #endif |
| 8406 | |
| 8407 | #if defined (HAVE_PNG) || defined (MAC_OS) |
| 8408 | if (EQ (type, Qpng)) |
| 8409 | return CHECK_LIB_AVAILABLE (&png_type, init_png_functions, libraries); |
| 8410 | #endif |
| 8411 | |
| 8412 | #ifdef HAVE_GHOSTSCRIPT |
| 8413 | if (EQ (type, Qpostscript)) |
| 8414 | return CHECK_LIB_AVAILABLE (&gs_type, init_gs_functions, libraries); |
| 8415 | #endif |
| 8416 | |
| 8417 | /* If the type is not recognized, avoid testing it ever again. */ |
| 8418 | CACHE_IMAGE_TYPE (type, Qnil); |
| 8419 | return Qnil; |
| 8420 | } |
| 8421 | |
| 8422 | void |
| 8423 | syms_of_image () |
| 8424 | { |
| 8425 | extern Lisp_Object Qrisky_local_variable; /* Syms_of_xdisp has already run. */ |
| 8426 | |
| 8427 | /* Initialize this only once, since that's what we do with Vimage_types |
| 8428 | and they are supposed to be in sync. Initializing here gives correct |
| 8429 | operation on GNU/Linux of calling dump-emacs after loading some images. */ |
| 8430 | image_types = NULL; |
| 8431 | |
| 8432 | /* Must be defined now becase we're going to update it below, while |
| 8433 | defining the supported image types. */ |
| 8434 | DEFVAR_LISP ("image-types", &Vimage_types, |
| 8435 | doc: /* List of potentially supported image types. |
| 8436 | Each element of the list is a symbol for a image type, like 'jpeg or 'png. |
| 8437 | To check whether it is really supported, use `image-type-available-p'. */); |
| 8438 | Vimage_types = Qnil; |
| 8439 | |
| 8440 | DEFVAR_LISP ("image-library-alist", &Vimage_library_alist, |
| 8441 | doc: /* Alist of image types vs external libraries needed to display them. |
| 8442 | |
| 8443 | Each element is a list (IMAGE-TYPE LIBRARY...), where the car is a symbol |
| 8444 | representing a supported image type, and the rest are strings giving |
| 8445 | alternate filenames for the corresponding external libraries. |
| 8446 | |
| 8447 | Emacs tries to load the libraries in the order they appear on the |
| 8448 | list; if none is loaded, the running session of Emacs won't |
| 8449 | support the image type. Types 'pbm and 'xbm don't need to be |
| 8450 | listed; they're always supported. */); |
| 8451 | Vimage_library_alist = Qnil; |
| 8452 | Fput (intern ("image-library-alist"), Qrisky_local_variable, Qt); |
| 8453 | |
| 8454 | DEFVAR_LISP ("max-image-size", &Vmax_image_size, |
| 8455 | doc: /* Maximum size of images. |
| 8456 | Emacs will not load an image into memory if its pixel width or |
| 8457 | pixel height exceeds this limit. |
| 8458 | |
| 8459 | If the value is an integer, it directly specifies the maximum |
| 8460 | image height and width, measured in pixels. If it is a floating |
| 8461 | point number, it specifies the maximum image height and width |
| 8462 | as a ratio to the frame height and width. If the value is |
| 8463 | non-numeric, there is no explicit limit on the size of images. */); |
| 8464 | Vmax_image_size = make_float (MAX_IMAGE_SIZE); |
| 8465 | |
| 8466 | Vimage_type_cache = Qnil; |
| 8467 | staticpro (&Vimage_type_cache); |
| 8468 | |
| 8469 | Qpbm = intern ("pbm"); |
| 8470 | staticpro (&Qpbm); |
| 8471 | ADD_IMAGE_TYPE(Qpbm); |
| 8472 | |
| 8473 | Qxbm = intern ("xbm"); |
| 8474 | staticpro (&Qxbm); |
| 8475 | ADD_IMAGE_TYPE(Qxbm); |
| 8476 | |
| 8477 | define_image_type (&xbm_type, 1); |
| 8478 | define_image_type (&pbm_type, 1); |
| 8479 | |
| 8480 | QCascent = intern (":ascent"); |
| 8481 | staticpro (&QCascent); |
| 8482 | QCmargin = intern (":margin"); |
| 8483 | staticpro (&QCmargin); |
| 8484 | QCrelief = intern (":relief"); |
| 8485 | staticpro (&QCrelief); |
| 8486 | QCconversion = intern (":conversion"); |
| 8487 | staticpro (&QCconversion); |
| 8488 | QCcolor_symbols = intern (":color-symbols"); |
| 8489 | staticpro (&QCcolor_symbols); |
| 8490 | QCheuristic_mask = intern (":heuristic-mask"); |
| 8491 | staticpro (&QCheuristic_mask); |
| 8492 | QCindex = intern (":index"); |
| 8493 | staticpro (&QCindex); |
| 8494 | QCmatrix = intern (":matrix"); |
| 8495 | staticpro (&QCmatrix); |
| 8496 | QCcolor_adjustment = intern (":color-adjustment"); |
| 8497 | staticpro (&QCcolor_adjustment); |
| 8498 | QCmask = intern (":mask"); |
| 8499 | staticpro (&QCmask); |
| 8500 | |
| 8501 | Qlaplace = intern ("laplace"); |
| 8502 | staticpro (&Qlaplace); |
| 8503 | Qemboss = intern ("emboss"); |
| 8504 | staticpro (&Qemboss); |
| 8505 | Qedge_detection = intern ("edge-detection"); |
| 8506 | staticpro (&Qedge_detection); |
| 8507 | Qheuristic = intern ("heuristic"); |
| 8508 | staticpro (&Qheuristic); |
| 8509 | |
| 8510 | Qpostscript = intern ("postscript"); |
| 8511 | staticpro (&Qpostscript); |
| 8512 | #ifdef HAVE_GHOSTSCRIPT |
| 8513 | ADD_IMAGE_TYPE(Qpostscript); |
| 8514 | QCloader = intern (":loader"); |
| 8515 | staticpro (&QCloader); |
| 8516 | QCbounding_box = intern (":bounding-box"); |
| 8517 | staticpro (&QCbounding_box); |
| 8518 | QCpt_width = intern (":pt-width"); |
| 8519 | staticpro (&QCpt_width); |
| 8520 | QCpt_height = intern (":pt-height"); |
| 8521 | staticpro (&QCpt_height); |
| 8522 | #endif /* HAVE_GHOSTSCRIPT */ |
| 8523 | |
| 8524 | #if defined (HAVE_XPM) || defined (MAC_OS) |
| 8525 | Qxpm = intern ("xpm"); |
| 8526 | staticpro (&Qxpm); |
| 8527 | ADD_IMAGE_TYPE(Qxpm); |
| 8528 | #endif |
| 8529 | |
| 8530 | #if defined (HAVE_JPEG) || defined (MAC_OS) |
| 8531 | Qjpeg = intern ("jpeg"); |
| 8532 | staticpro (&Qjpeg); |
| 8533 | ADD_IMAGE_TYPE(Qjpeg); |
| 8534 | #endif |
| 8535 | |
| 8536 | #if defined (HAVE_TIFF) || defined (MAC_OS) |
| 8537 | Qtiff = intern ("tiff"); |
| 8538 | staticpro (&Qtiff); |
| 8539 | ADD_IMAGE_TYPE(Qtiff); |
| 8540 | #endif |
| 8541 | |
| 8542 | #if defined (HAVE_GIF) || defined (MAC_OS) |
| 8543 | Qgif = intern ("gif"); |
| 8544 | staticpro (&Qgif); |
| 8545 | ADD_IMAGE_TYPE(Qgif); |
| 8546 | #endif |
| 8547 | |
| 8548 | #if defined (HAVE_PNG) || defined (MAC_OS) |
| 8549 | Qpng = intern ("png"); |
| 8550 | staticpro (&Qpng); |
| 8551 | ADD_IMAGE_TYPE(Qpng); |
| 8552 | #endif |
| 8553 | |
| 8554 | defsubr (&Sinit_image_library); |
| 8555 | defsubr (&Sclear_image_cache); |
| 8556 | defsubr (&Simage_size); |
| 8557 | defsubr (&Simage_mask_p); |
| 8558 | |
| 8559 | #if GLYPH_DEBUG |
| 8560 | defsubr (&Simagep); |
| 8561 | defsubr (&Slookup_image); |
| 8562 | #endif |
| 8563 | |
| 8564 | DEFVAR_BOOL ("cross-disabled-images", &cross_disabled_images, |
| 8565 | doc: /* Non-nil means always draw a cross over disabled images. |
| 8566 | Disabled images are those having an `:conversion disabled' property. |
| 8567 | A cross is always drawn on black & white displays. */); |
| 8568 | cross_disabled_images = 0; |
| 8569 | |
| 8570 | DEFVAR_LISP ("x-bitmap-file-path", &Vx_bitmap_file_path, |
| 8571 | doc: /* List of directories to search for window system bitmap files. */); |
| 8572 | Vx_bitmap_file_path = decode_env_path ((char *) 0, PATH_BITMAPS); |
| 8573 | |
| 8574 | DEFVAR_LISP ("image-cache-eviction-delay", &Vimage_cache_eviction_delay, |
| 8575 | doc: /* Time after which cached images are removed from the cache. |
| 8576 | When an image has not been displayed this many seconds, remove it |
| 8577 | from the image cache. Value must be an integer or nil with nil |
| 8578 | meaning don't clear the cache. */); |
| 8579 | Vimage_cache_eviction_delay = make_number (30 * 60); |
| 8580 | } |
| 8581 | |
| 8582 | void |
| 8583 | init_image () |
| 8584 | { |
| 8585 | #if defined (MAC_OSX) && TARGET_API_MAC_CARBON |
| 8586 | init_image_func_pointer (); |
| 8587 | #endif |
| 8588 | } |
| 8589 | |
| 8590 | /* arch-tag: 123c2a5e-14a8-4c53-ab95-af47d7db49b9 |
| 8591 | (do not change this comment) */ |