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4ef0d4d0 KS |
1 | /* Functions for image support on window system. |
2 | Copyright (C) 1989, 92, 93, 94, 95, 96, 97, 98, 99, 2000,01,02,03,04 | |
3 | Free Software Foundation. | |
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., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | #include <config.h> | |
23 | #include <signal.h> | |
24 | #include <stdio.h> | |
25 | #include <math.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 | ||
43 | ||
44 | #ifdef HAVE_X_WINDOWS | |
45 | #include "xterm.h" | |
46 | #include <sys/types.h> | |
47 | #include <sys/stat.h> | |
48 | ||
49 | #define COLOR_TABLE_SUPPORT 1 | |
50 | ||
51 | typedef struct x_bitmap_record Bitmap_Record; | |
4ef0d4d0 KS |
52 | #define GET_PIXEL(ximg, x, y) XGetPixel(ximg, x, y) |
53 | #define NO_PIXMAP None | |
4ef0d4d0 KS |
54 | |
55 | #define RGB_PIXEL_COLOR unsigned long | |
56 | ||
57 | #define PIX_MASK_RETAIN(f) 0 | |
58 | #define PIX_MASK_DRAW(f) 1 | |
59 | #endif /* HAVE_X_WINDOWS */ | |
60 | ||
61 | ||
62 | #ifdef HAVE_NTGUI | |
63 | #include "w32term.h" | |
64 | ||
65 | /* W32_TODO : Color tables on W32. */ | |
66 | #undef COLOR_TABLE_SUPPORT | |
67 | ||
68 | typedef struct w32_bitmap_record Bitmap_Record; | |
4ef0d4d0 KS |
69 | #define GET_PIXEL(ximg, x, y) GetPixel(ximg, x, y) |
70 | #define NO_PIXMAP 0 | |
4ef0d4d0 KS |
71 | |
72 | #define RGB_PIXEL_COLOR COLORREF | |
73 | ||
74 | #define PIX_MASK_RETAIN(f) 0 | |
75 | #define PIX_MASK_DRAW(f) 1 | |
76 | ||
77 | #define FRAME_X_VISUAL(f) FRAME_X_DISPLAY_INFO (f)->visual | |
78 | #define x_defined_color w32_defined_color | |
79 | #define DefaultDepthOfScreen(screen) (one_w32_display_info.n_cbits) | |
80 | #endif /* HAVE_NTGUI */ | |
81 | ||
82 | ||
83 | #ifdef MAC_OS | |
84 | #include "macterm.h" | |
85 | #ifndef MAC_OSX | |
86 | #include <alloca.h> | |
87 | #endif | |
88 | #ifdef MAC_OSX | |
5243c06a | 89 | #include <sys/stat.h> |
4ef0d4d0 KS |
90 | #include <QuickTime/QuickTime.h> |
91 | #else /* not MAC_OSX */ | |
92 | #include <Windows.h> | |
93 | #include <Gestalt.h> | |
94 | #include <TextUtils.h> | |
95 | #endif /* not MAC_OSX */ | |
96 | ||
97 | /* MAC_TODO : Color tables on Mac. */ | |
98 | #undef COLOR_TABLE_SUPPORT | |
99 | ||
4ef0d4d0 KS |
100 | #define ZPixmap 0 /* arbitrary */ |
101 | typedef struct mac_bitmap_record Bitmap_Record; | |
102 | ||
4ef0d4d0 KS |
103 | #define GET_PIXEL(ximg, x, y) XGetPixel(ximg, x, y) |
104 | #define NO_PIXMAP 0 | |
4ef0d4d0 KS |
105 | |
106 | #define RGB_PIXEL_COLOR unsigned long | |
107 | ||
108 | #define FRAME_X_VISUAL(f) FRAME_X_DISPLAY_INFO (f)->visual | |
109 | #define x_defined_color mac_defined_color | |
110 | #define DefaultDepthOfScreen(screen) (one_mac_display_info.n_planes) | |
111 | #define XDrawLine(display, w, gc, x1, y1, x2, y2) \ | |
112 | mac_draw_line_to_pixmap(display, w, gc, x1, y1, x2, y2) | |
113 | ||
114 | #endif /* MAC_OS */ | |
115 | ||
116 | ||
117 | /* Search path for bitmap files. */ | |
118 | ||
119 | Lisp_Object Vx_bitmap_file_path; | |
120 | ||
121 | ||
122 | static void x_disable_image P_ ((struct frame *, struct image *)); | |
123 | static void x_edge_detection P_ ((struct frame *, struct image *, Lisp_Object, | |
124 | Lisp_Object)); | |
125 | ||
126 | static void init_color_table P_ ((void)); | |
127 | static unsigned long lookup_rgb_color P_ ((struct frame *f, int r, int g, int b)); | |
128 | #ifdef COLOR_TABLE_SUPPORT | |
129 | static void free_color_table P_ ((void)); | |
130 | static unsigned long *colors_in_color_table P_ ((int *n)); | |
131 | static unsigned long lookup_pixel_color P_ ((struct frame *f, unsigned long p)); | |
132 | #endif | |
133 | ||
134 | /* Code to deal with bitmaps. Bitmaps are referenced by their bitmap | |
135 | id, which is just an int that this section returns. Bitmaps are | |
136 | reference counted so they can be shared among frames. | |
137 | ||
138 | Bitmap indices are guaranteed to be > 0, so a negative number can | |
139 | be used to indicate no bitmap. | |
140 | ||
141 | If you use x_create_bitmap_from_data, then you must keep track of | |
142 | the bitmaps yourself. That is, creating a bitmap from the same | |
143 | data more than once will not be caught. */ | |
144 | ||
145 | #ifdef MAC_OS | |
146 | ||
147 | static XImagePtr | |
148 | XGetImage (display, pixmap, x, y, width, height, plane_mask, format) | |
149 | Display *display; /* not used */ | |
150 | Pixmap pixmap; | |
151 | int x, y; /* not used */ | |
152 | unsigned int width, height; /* not used */ | |
153 | unsigned long plane_mask; /* not used */ | |
154 | int format; /* not used */ | |
155 | { | |
156 | #if GLYPH_DEBUG | |
157 | xassert (x == 0 && y == 0); | |
158 | { | |
159 | Rect ri, rp; | |
160 | SetRect (&ri, 0, 0, width, height); | |
161 | xassert (EqualRect (&ri, GetPixBounds (GetGWorldPixMap (pixmap), &rp))); | |
162 | } | |
163 | xassert (! (pixelsLocked & GetPixelsState (GetGWorldPixMap (pixmap)))); | |
164 | #endif | |
165 | ||
166 | LockPixels (GetGWorldPixMap (pixmap)); | |
167 | ||
168 | return pixmap; | |
169 | } | |
170 | ||
171 | static void | |
172 | XPutPixel (ximage, x, y, pixel) | |
173 | XImagePtr ximage; | |
174 | int x, y; | |
175 | unsigned long pixel; | |
176 | { | |
177 | RGBColor color; | |
178 | ||
179 | SetGWorld (ximage, NULL); | |
180 | ||
181 | color.red = RED16_FROM_ULONG (pixel); | |
182 | color.green = GREEN16_FROM_ULONG (pixel); | |
183 | color.blue = BLUE16_FROM_ULONG (pixel); | |
184 | SetCPixel (x, y, &color); | |
185 | } | |
186 | ||
187 | static unsigned long | |
188 | XGetPixel (ximage, x, y) | |
189 | XImagePtr ximage; | |
190 | int x, y; | |
191 | { | |
192 | RGBColor color; | |
193 | ||
194 | SetGWorld (ximage, NULL); | |
195 | ||
196 | GetCPixel (x, y, &color); | |
197 | return RGB_TO_ULONG (color.red >> 8, color.green >> 8, color.blue >> 8); | |
198 | } | |
199 | ||
200 | static void | |
201 | XDestroyImage (ximg) | |
202 | XImagePtr ximg; | |
203 | { | |
204 | UnlockPixels (GetGWorldPixMap (ximg)); | |
205 | } | |
206 | #endif | |
207 | ||
208 | ||
209 | /* Functions to access the contents of a bitmap, given an id. */ | |
210 | ||
211 | int | |
212 | x_bitmap_height (f, id) | |
213 | FRAME_PTR f; | |
214 | int id; | |
215 | { | |
216 | return FRAME_X_DISPLAY_INFO (f)->bitmaps[id - 1].height; | |
217 | } | |
218 | ||
219 | int | |
220 | x_bitmap_width (f, id) | |
221 | FRAME_PTR f; | |
222 | int id; | |
223 | { | |
224 | return FRAME_X_DISPLAY_INFO (f)->bitmaps[id - 1].width; | |
225 | } | |
226 | ||
227 | #if defined (HAVE_X_WINDOWS) || defined (HAVE_NTGUI) | |
228 | int | |
229 | x_bitmap_pixmap (f, id) | |
230 | FRAME_PTR f; | |
231 | int id; | |
232 | { | |
233 | return (int) FRAME_X_DISPLAY_INFO (f)->bitmaps[id - 1].pixmap; | |
234 | } | |
235 | #endif | |
236 | ||
237 | #ifdef HAVE_X_WINDOWS | |
238 | int | |
239 | x_bitmap_mask (f, id) | |
240 | FRAME_PTR f; | |
241 | int id; | |
242 | { | |
243 | return FRAME_X_DISPLAY_INFO (f)->bitmaps[id - 1].mask; | |
244 | } | |
245 | #endif | |
246 | ||
247 | /* Allocate a new bitmap record. Returns index of new record. */ | |
248 | ||
249 | static int | |
250 | x_allocate_bitmap_record (f) | |
251 | FRAME_PTR f; | |
252 | { | |
253 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); | |
254 | int i; | |
255 | ||
256 | if (dpyinfo->bitmaps == NULL) | |
257 | { | |
258 | dpyinfo->bitmaps_size = 10; | |
259 | dpyinfo->bitmaps | |
260 | = (Bitmap_Record *) xmalloc (dpyinfo->bitmaps_size * sizeof (Bitmap_Record)); | |
261 | dpyinfo->bitmaps_last = 1; | |
262 | return 1; | |
263 | } | |
264 | ||
265 | if (dpyinfo->bitmaps_last < dpyinfo->bitmaps_size) | |
266 | return ++dpyinfo->bitmaps_last; | |
267 | ||
268 | for (i = 0; i < dpyinfo->bitmaps_size; ++i) | |
269 | if (dpyinfo->bitmaps[i].refcount == 0) | |
270 | return i + 1; | |
271 | ||
272 | dpyinfo->bitmaps_size *= 2; | |
273 | dpyinfo->bitmaps | |
274 | = (Bitmap_Record *) xrealloc (dpyinfo->bitmaps, | |
275 | dpyinfo->bitmaps_size * sizeof (Bitmap_Record)); | |
276 | return ++dpyinfo->bitmaps_last; | |
277 | } | |
278 | ||
279 | /* Add one reference to the reference count of the bitmap with id ID. */ | |
280 | ||
281 | void | |
282 | x_reference_bitmap (f, id) | |
283 | FRAME_PTR f; | |
284 | int id; | |
285 | { | |
286 | ++FRAME_X_DISPLAY_INFO (f)->bitmaps[id - 1].refcount; | |
287 | } | |
288 | ||
289 | /* Create a bitmap for frame F from a HEIGHT x WIDTH array of bits at BITS. */ | |
290 | ||
291 | int | |
292 | x_create_bitmap_from_data (f, bits, width, height) | |
293 | struct frame *f; | |
294 | char *bits; | |
295 | unsigned int width, height; | |
296 | { | |
297 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); | |
298 | int id; | |
299 | ||
300 | #ifdef HAVE_X_WINDOWS | |
301 | Pixmap bitmap; | |
302 | bitmap = XCreateBitmapFromData (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), | |
303 | bits, width, height); | |
304 | if (! bitmap) | |
305 | return -1; | |
306 | #endif /* HAVE_X_WINDOWS */ | |
307 | ||
308 | #ifdef HAVE_NTGUI | |
309 | Pixmap bitmap; | |
310 | bitmap = CreateBitmap (width, height, | |
311 | FRAME_X_DISPLAY_INFO (XFRAME (frame))->n_planes, | |
312 | FRAME_X_DISPLAY_INFO (XFRAME (frame))->n_cbits, | |
313 | bits); | |
314 | if (! bitmap) | |
315 | return -1; | |
316 | #endif /* HAVE_NTGUI */ | |
317 | ||
318 | #ifdef MAC_OS | |
319 | /* MAC_TODO: for now fail if width is not mod 16 (toolbox requires it) */ | |
320 | if (width % 16 != 0) | |
321 | return -1; | |
322 | #endif | |
323 | ||
324 | id = x_allocate_bitmap_record (f); | |
325 | #ifdef MAC_OS | |
326 | dpyinfo->bitmaps[id - 1].bitmap_data = (char *) xmalloc (height * width); | |
327 | if (! dpyinfo->bitmaps[id - 1].bitmap_data) | |
328 | return -1; | |
329 | bcopy (bits, dpyinfo->bitmaps[id - 1].bitmap_data, height * width); | |
330 | #endif /* MAC_OS */ | |
331 | ||
332 | dpyinfo->bitmaps[id - 1].file = NULL; | |
333 | dpyinfo->bitmaps[id - 1].height = height; | |
334 | dpyinfo->bitmaps[id - 1].width = width; | |
335 | dpyinfo->bitmaps[id - 1].refcount = 1; | |
336 | ||
337 | #ifdef HAVE_X_WINDOWS | |
338 | dpyinfo->bitmaps[id - 1].pixmap = bitmap; | |
339 | dpyinfo->bitmaps[id - 1].have_mask = 0; | |
340 | dpyinfo->bitmaps[id - 1].depth = 1; | |
341 | #endif /* HAVE_X_WINDOWS */ | |
342 | ||
343 | #ifdef HAVE_NTGUI | |
344 | dpyinfo->bitmaps[id - 1].pixmap = bitmap; | |
345 | dpyinfo->bitmaps[id - 1].hinst = NULL; | |
346 | dpyinfo->bitmaps[id - 1].depth = 1; | |
347 | #endif /* HAVE_NTGUI */ | |
348 | ||
349 | return id; | |
350 | } | |
351 | ||
352 | /* Create bitmap from file FILE for frame F. */ | |
353 | ||
354 | int | |
355 | x_create_bitmap_from_file (f, file) | |
356 | struct frame *f; | |
357 | Lisp_Object file; | |
358 | { | |
359 | #ifdef MAC_OS | |
360 | return -1; /* MAC_TODO : bitmap support */ | |
361 | #endif /* MAC_OS */ | |
362 | ||
363 | #ifdef HAVE_NTGUI | |
364 | return -1; /* W32_TODO : bitmap support */ | |
365 | #endif /* HAVE_NTGUI */ | |
366 | ||
367 | #ifdef HAVE_X_WINDOWS | |
368 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); | |
369 | unsigned int width, height; | |
370 | Pixmap bitmap; | |
371 | int xhot, yhot, result, id; | |
372 | Lisp_Object found; | |
373 | int fd; | |
374 | char *filename; | |
375 | ||
376 | /* Look for an existing bitmap with the same name. */ | |
377 | for (id = 0; id < dpyinfo->bitmaps_last; ++id) | |
378 | { | |
379 | if (dpyinfo->bitmaps[id].refcount | |
380 | && dpyinfo->bitmaps[id].file | |
381 | && !strcmp (dpyinfo->bitmaps[id].file, (char *) SDATA (file))) | |
382 | { | |
383 | ++dpyinfo->bitmaps[id].refcount; | |
384 | return id + 1; | |
385 | } | |
386 | } | |
387 | ||
388 | /* Search bitmap-file-path for the file, if appropriate. */ | |
389 | fd = openp (Vx_bitmap_file_path, file, Qnil, &found, Qnil); | |
390 | if (fd < 0) | |
391 | return -1; | |
392 | emacs_close (fd); | |
393 | ||
394 | filename = (char *) SDATA (found); | |
395 | ||
396 | result = XReadBitmapFile (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), | |
397 | filename, &width, &height, &bitmap, &xhot, &yhot); | |
398 | if (result != BitmapSuccess) | |
399 | return -1; | |
400 | ||
401 | id = x_allocate_bitmap_record (f); | |
402 | dpyinfo->bitmaps[id - 1].pixmap = bitmap; | |
403 | dpyinfo->bitmaps[id - 1].have_mask = 0; | |
404 | dpyinfo->bitmaps[id - 1].refcount = 1; | |
405 | dpyinfo->bitmaps[id - 1].file = (char *) xmalloc (SBYTES (file) + 1); | |
406 | dpyinfo->bitmaps[id - 1].depth = 1; | |
407 | dpyinfo->bitmaps[id - 1].height = height; | |
408 | dpyinfo->bitmaps[id - 1].width = width; | |
409 | strcpy (dpyinfo->bitmaps[id - 1].file, SDATA (file)); | |
410 | ||
411 | return id; | |
412 | #endif /* HAVE_X_WINDOWS */ | |
413 | } | |
414 | ||
415 | /* Free bitmap B. */ | |
416 | ||
417 | static void | |
418 | Free_Bitmap_Record (dpyinfo, bm) | |
419 | Display_Info *dpyinfo; | |
420 | Bitmap_Record *bm; | |
421 | { | |
422 | #ifdef HAVE_X_WINDOWS | |
423 | XFreePixmap (dpyinfo->display, bm->pixmap); | |
424 | if (bm->have_mask) | |
425 | XFreePixmap (dpyinfo->display, bm->mask); | |
426 | #endif /* HAVE_X_WINDOWS */ | |
427 | ||
428 | #ifdef HAVE_NTGUI | |
429 | DeleteObject (bm->pixmap); | |
430 | #endif /* HAVE_NTGUI */ | |
431 | ||
432 | #ifdef MAC_OS | |
433 | xfree (bm->bitmap_data); /* Added ++kfs */ | |
434 | bm->bitmap_data = NULL; | |
435 | #endif /* MAC_OS */ | |
436 | ||
437 | if (bm->file) | |
438 | { | |
439 | xfree (bm->file); | |
440 | bm->file = NULL; | |
441 | } | |
442 | } | |
443 | ||
444 | /* Remove reference to bitmap with id number ID. */ | |
445 | ||
446 | void | |
447 | x_destroy_bitmap (f, id) | |
448 | FRAME_PTR f; | |
449 | int id; | |
450 | { | |
451 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); | |
452 | ||
453 | if (id > 0) | |
454 | { | |
455 | Bitmap_Record *bm = &dpyinfo->bitmaps[id - 1]; | |
456 | ||
457 | if (--bm->refcount == 0) | |
458 | { | |
459 | BLOCK_INPUT; | |
460 | Free_Bitmap_Record (dpyinfo, bm); | |
461 | UNBLOCK_INPUT; | |
462 | } | |
463 | } | |
464 | } | |
465 | ||
466 | /* Free all the bitmaps for the display specified by DPYINFO. */ | |
467 | ||
468 | void | |
469 | x_destroy_all_bitmaps (dpyinfo) | |
470 | Display_Info *dpyinfo; | |
471 | { | |
472 | int i; | |
473 | Bitmap_Record *bm = dpyinfo->bitmaps; | |
474 | ||
475 | for (i = 0; i < dpyinfo->bitmaps_last; i++, bm++) | |
476 | if (bm->refcount > 0) | |
477 | Free_Bitmap_Record (dpyinfo, bm); | |
478 | ||
479 | dpyinfo->bitmaps_last = 0; | |
480 | } | |
481 | ||
482 | ||
483 | #ifdef HAVE_X_WINDOWS | |
484 | ||
485 | /* Useful functions defined in the section | |
486 | `Image type independent image structures' below. */ | |
487 | ||
488 | static unsigned long four_corners_best P_ ((XImagePtr ximg, unsigned long width, | |
489 | unsigned long height)); | |
490 | ||
491 | static int x_create_x_image_and_pixmap P_ ((struct frame *f, int width, int height, | |
492 | int depth, XImagePtr *ximg, | |
493 | Pixmap *pixmap)); | |
494 | ||
495 | static void x_destroy_x_image P_ ((XImagePtr ximg)); | |
496 | ||
497 | ||
498 | /* Create a mask of a bitmap. Note is this not a perfect mask. | |
499 | It's nicer with some borders in this context */ | |
500 | ||
501 | int | |
502 | x_create_bitmap_mask (f, id) | |
503 | struct frame *f; | |
504 | int id; | |
505 | { | |
506 | Pixmap pixmap, mask; | |
507 | XImagePtr ximg, mask_img; | |
508 | unsigned long width, height; | |
509 | int result; | |
510 | unsigned long bg; | |
511 | unsigned long x, y, xp, xm, yp, ym; | |
512 | GC gc; | |
513 | ||
514 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); | |
515 | ||
516 | if (!(id > 0)) | |
517 | return -1; | |
518 | ||
519 | pixmap = x_bitmap_pixmap (f, id); | |
520 | width = x_bitmap_width (f, id); | |
521 | height = x_bitmap_height (f, id); | |
522 | ||
523 | BLOCK_INPUT; | |
524 | ximg = XGetImage (FRAME_X_DISPLAY (f), pixmap, 0, 0, width, height, | |
525 | ~0, ZPixmap); | |
526 | ||
527 | if (!ximg) | |
528 | { | |
529 | UNBLOCK_INPUT; | |
530 | return -1; | |
531 | } | |
532 | ||
533 | result = x_create_x_image_and_pixmap (f, width, height, 1, &mask_img, &mask); | |
534 | ||
535 | UNBLOCK_INPUT; | |
536 | if (!result) | |
537 | { | |
538 | XDestroyImage (ximg); | |
539 | return -1; | |
540 | } | |
541 | ||
542 | bg = four_corners_best (ximg, width, height); | |
543 | ||
544 | for (y = 0; y < ximg->height; ++y) | |
545 | { | |
546 | for (x = 0; x < ximg->width; ++x) | |
547 | { | |
548 | xp = x != ximg->width - 1 ? x + 1 : 0; | |
549 | xm = x != 0 ? x - 1 : ximg->width - 1; | |
550 | yp = y != ximg->height - 1 ? y + 1 : 0; | |
551 | ym = y != 0 ? y - 1 : ximg->height - 1; | |
552 | if (XGetPixel (ximg, x, y) == bg | |
553 | && XGetPixel (ximg, x, yp) == bg | |
554 | && XGetPixel (ximg, x, ym) == bg | |
555 | && XGetPixel (ximg, xp, y) == bg | |
556 | && XGetPixel (ximg, xp, yp) == bg | |
557 | && XGetPixel (ximg, xp, ym) == bg | |
558 | && XGetPixel (ximg, xm, y) == bg | |
559 | && XGetPixel (ximg, xm, yp) == bg | |
560 | && XGetPixel (ximg, xm, ym) == bg) | |
561 | XPutPixel (mask_img, x, y, 0); | |
562 | else | |
563 | XPutPixel (mask_img, x, y, 1); | |
564 | } | |
565 | } | |
566 | ||
567 | xassert (interrupt_input_blocked); | |
568 | gc = XCreateGC (FRAME_X_DISPLAY (f), mask, 0, NULL); | |
569 | XPutImage (FRAME_X_DISPLAY (f), mask, gc, mask_img, 0, 0, 0, 0, | |
570 | width, height); | |
571 | XFreeGC (FRAME_X_DISPLAY (f), gc); | |
572 | ||
573 | dpyinfo->bitmaps[id - 1].have_mask = 1; | |
574 | dpyinfo->bitmaps[id - 1].mask = mask; | |
575 | ||
576 | XDestroyImage (ximg); | |
577 | x_destroy_x_image (mask_img); | |
578 | ||
579 | return 0; | |
580 | } | |
581 | ||
582 | #endif /* HAVE_X_WINDOWS */ | |
583 | ||
584 | ||
585 | /*********************************************************************** | |
586 | Image types | |
587 | ***********************************************************************/ | |
588 | ||
589 | /* Value is the number of elements of vector VECTOR. */ | |
590 | ||
591 | #define DIM(VECTOR) (sizeof (VECTOR) / sizeof *(VECTOR)) | |
592 | ||
593 | /* List of supported image types. Use define_image_type to add new | |
594 | types. Use lookup_image_type to find a type for a given symbol. */ | |
595 | ||
596 | static struct image_type *image_types; | |
597 | ||
598 | /* The symbol `xbm' which is used as the type symbol for XBM images. */ | |
599 | ||
600 | Lisp_Object Qxbm; | |
601 | ||
602 | /* Keywords. */ | |
603 | ||
604 | extern Lisp_Object QCwidth, QCheight, QCforeground, QCbackground, QCfile; | |
605 | extern Lisp_Object QCdata, QCtype; | |
e1dfec15 | 606 | extern Lisp_Object Qcenter; |
4ef0d4d0 KS |
607 | Lisp_Object QCascent, QCmargin, QCrelief; |
608 | Lisp_Object QCconversion, QCcolor_symbols, QCheuristic_mask; | |
609 | Lisp_Object QCindex, QCmatrix, QCcolor_adjustment, QCmask; | |
610 | ||
611 | /* Other symbols. */ | |
612 | ||
613 | Lisp_Object Qlaplace, Qemboss, Qedge_detection, Qheuristic; | |
4ef0d4d0 KS |
614 | |
615 | /* Time in seconds after which images should be removed from the cache | |
616 | if not displayed. */ | |
617 | ||
618 | Lisp_Object Vimage_cache_eviction_delay; | |
619 | ||
620 | /* Function prototypes. */ | |
621 | ||
622 | static void define_image_type P_ ((struct image_type *type)); | |
623 | static struct image_type *lookup_image_type P_ ((Lisp_Object symbol)); | |
624 | static void image_error P_ ((char *format, Lisp_Object, Lisp_Object)); | |
625 | static void x_laplace P_ ((struct frame *, struct image *)); | |
626 | static void x_emboss P_ ((struct frame *, struct image *)); | |
627 | static int x_build_heuristic_mask P_ ((struct frame *, struct image *, | |
628 | Lisp_Object)); | |
629 | ||
630 | ||
631 | /* Define a new image type from TYPE. This adds a copy of TYPE to | |
632 | image_types and adds the symbol *TYPE->type to Vimage_types. */ | |
633 | ||
634 | static void | |
635 | define_image_type (type) | |
636 | struct image_type *type; | |
637 | { | |
638 | /* Make a copy of TYPE to avoid a bus error in a dumped Emacs. | |
639 | The initialized data segment is read-only. */ | |
640 | struct image_type *p = (struct image_type *) xmalloc (sizeof *p); | |
641 | bcopy (type, p, sizeof *p); | |
642 | p->next = image_types; | |
643 | image_types = p; | |
644 | Vimage_types = Fcons (*p->type, Vimage_types); | |
645 | } | |
646 | ||
647 | ||
648 | /* Look up image type SYMBOL, and return a pointer to its image_type | |
649 | structure. Value is null if SYMBOL is not a known image type. */ | |
650 | ||
651 | static INLINE struct image_type * | |
652 | lookup_image_type (symbol) | |
653 | Lisp_Object symbol; | |
654 | { | |
655 | struct image_type *type; | |
656 | ||
657 | for (type = image_types; type; type = type->next) | |
658 | if (EQ (symbol, *type->type)) | |
659 | break; | |
660 | ||
661 | return type; | |
662 | } | |
663 | ||
664 | ||
665 | /* Value is non-zero if OBJECT is a valid Lisp image specification. A | |
666 | valid image specification is a list whose car is the symbol | |
667 | `image', and whose rest is a property list. The property list must | |
668 | contain a value for key `:type'. That value must be the name of a | |
669 | supported image type. The rest of the property list depends on the | |
670 | image type. */ | |
671 | ||
672 | int | |
673 | valid_image_p (object) | |
674 | Lisp_Object object; | |
675 | { | |
676 | int valid_p = 0; | |
677 | ||
678 | if (IMAGEP (object)) | |
679 | { | |
680 | Lisp_Object tem; | |
681 | ||
682 | for (tem = XCDR (object); CONSP (tem); tem = XCDR (tem)) | |
683 | if (EQ (XCAR (tem), QCtype)) | |
684 | { | |
685 | tem = XCDR (tem); | |
686 | if (CONSP (tem) && SYMBOLP (XCAR (tem))) | |
687 | { | |
688 | struct image_type *type; | |
689 | type = lookup_image_type (XCAR (tem)); | |
690 | if (type) | |
691 | valid_p = type->valid_p (object); | |
692 | } | |
693 | ||
694 | break; | |
695 | } | |
696 | } | |
697 | ||
698 | return valid_p; | |
699 | } | |
700 | ||
701 | ||
702 | /* Log error message with format string FORMAT and argument ARG. | |
703 | Signaling an error, e.g. when an image cannot be loaded, is not a | |
704 | good idea because this would interrupt redisplay, and the error | |
705 | message display would lead to another redisplay. This function | |
706 | therefore simply displays a message. */ | |
707 | ||
708 | static void | |
709 | image_error (format, arg1, arg2) | |
710 | char *format; | |
711 | Lisp_Object arg1, arg2; | |
712 | { | |
713 | add_to_log (format, arg1, arg2); | |
714 | } | |
715 | ||
716 | ||
717 | \f | |
718 | /*********************************************************************** | |
719 | Image specifications | |
720 | ***********************************************************************/ | |
721 | ||
722 | enum image_value_type | |
723 | { | |
724 | IMAGE_DONT_CHECK_VALUE_TYPE, | |
725 | IMAGE_STRING_VALUE, | |
726 | IMAGE_STRING_OR_NIL_VALUE, | |
727 | IMAGE_SYMBOL_VALUE, | |
728 | IMAGE_POSITIVE_INTEGER_VALUE, | |
729 | IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR, | |
730 | IMAGE_NON_NEGATIVE_INTEGER_VALUE, | |
731 | IMAGE_ASCENT_VALUE, | |
732 | IMAGE_INTEGER_VALUE, | |
733 | IMAGE_FUNCTION_VALUE, | |
734 | IMAGE_NUMBER_VALUE, | |
735 | IMAGE_BOOL_VALUE | |
736 | }; | |
737 | ||
738 | /* Structure used when parsing image specifications. */ | |
739 | ||
740 | struct image_keyword | |
741 | { | |
742 | /* Name of keyword. */ | |
743 | char *name; | |
744 | ||
745 | /* The type of value allowed. */ | |
746 | enum image_value_type type; | |
747 | ||
748 | /* Non-zero means key must be present. */ | |
749 | int mandatory_p; | |
750 | ||
751 | /* Used to recognize duplicate keywords in a property list. */ | |
752 | int count; | |
753 | ||
754 | /* The value that was found. */ | |
755 | Lisp_Object value; | |
756 | }; | |
757 | ||
758 | ||
759 | static int parse_image_spec P_ ((Lisp_Object, struct image_keyword *, | |
760 | int, Lisp_Object)); | |
761 | static Lisp_Object image_spec_value P_ ((Lisp_Object, Lisp_Object, int *)); | |
762 | ||
763 | ||
764 | /* Parse image spec SPEC according to KEYWORDS. A valid image spec | |
765 | has the format (image KEYWORD VALUE ...). One of the keyword/ | |
766 | value pairs must be `:type TYPE'. KEYWORDS is a vector of | |
767 | image_keywords structures of size NKEYWORDS describing other | |
768 | allowed keyword/value pairs. Value is non-zero if SPEC is valid. */ | |
769 | ||
770 | static int | |
771 | parse_image_spec (spec, keywords, nkeywords, type) | |
772 | Lisp_Object spec; | |
773 | struct image_keyword *keywords; | |
774 | int nkeywords; | |
775 | Lisp_Object type; | |
776 | { | |
777 | int i; | |
778 | Lisp_Object plist; | |
779 | ||
780 | if (!IMAGEP (spec)) | |
781 | return 0; | |
782 | ||
783 | plist = XCDR (spec); | |
784 | while (CONSP (plist)) | |
785 | { | |
786 | Lisp_Object key, value; | |
787 | ||
788 | /* First element of a pair must be a symbol. */ | |
789 | key = XCAR (plist); | |
790 | plist = XCDR (plist); | |
791 | if (!SYMBOLP (key)) | |
792 | return 0; | |
793 | ||
794 | /* There must follow a value. */ | |
795 | if (!CONSP (plist)) | |
796 | return 0; | |
797 | value = XCAR (plist); | |
798 | plist = XCDR (plist); | |
799 | ||
800 | /* Find key in KEYWORDS. Error if not found. */ | |
801 | for (i = 0; i < nkeywords; ++i) | |
802 | if (strcmp (keywords[i].name, SDATA (SYMBOL_NAME (key))) == 0) | |
803 | break; | |
804 | ||
805 | if (i == nkeywords) | |
806 | continue; | |
807 | ||
808 | /* Record that we recognized the keyword. If a keywords | |
809 | was found more than once, it's an error. */ | |
810 | keywords[i].value = value; | |
811 | ++keywords[i].count; | |
812 | ||
813 | if (keywords[i].count > 1) | |
814 | return 0; | |
815 | ||
816 | /* Check type of value against allowed type. */ | |
817 | switch (keywords[i].type) | |
818 | { | |
819 | case IMAGE_STRING_VALUE: | |
820 | if (!STRINGP (value)) | |
821 | return 0; | |
822 | break; | |
823 | ||
824 | case IMAGE_STRING_OR_NIL_VALUE: | |
825 | if (!STRINGP (value) && !NILP (value)) | |
826 | return 0; | |
827 | break; | |
828 | ||
829 | case IMAGE_SYMBOL_VALUE: | |
830 | if (!SYMBOLP (value)) | |
831 | return 0; | |
832 | break; | |
833 | ||
834 | case IMAGE_POSITIVE_INTEGER_VALUE: | |
835 | if (!INTEGERP (value) || XINT (value) <= 0) | |
836 | return 0; | |
837 | break; | |
838 | ||
839 | case IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR: | |
840 | if (INTEGERP (value) && XINT (value) >= 0) | |
841 | break; | |
842 | if (CONSP (value) | |
843 | && INTEGERP (XCAR (value)) && INTEGERP (XCDR (value)) | |
844 | && XINT (XCAR (value)) >= 0 && XINT (XCDR (value)) >= 0) | |
845 | break; | |
846 | return 0; | |
847 | ||
848 | case IMAGE_ASCENT_VALUE: | |
849 | if (SYMBOLP (value) && EQ (value, Qcenter)) | |
850 | break; | |
851 | else if (INTEGERP (value) | |
852 | && XINT (value) >= 0 | |
853 | && XINT (value) <= 100) | |
854 | break; | |
855 | return 0; | |
856 | ||
857 | case IMAGE_NON_NEGATIVE_INTEGER_VALUE: | |
858 | if (!INTEGERP (value) || XINT (value) < 0) | |
859 | return 0; | |
860 | break; | |
861 | ||
862 | case IMAGE_DONT_CHECK_VALUE_TYPE: | |
863 | break; | |
864 | ||
865 | case IMAGE_FUNCTION_VALUE: | |
866 | value = indirect_function (value); | |
867 | if (SUBRP (value) | |
868 | || COMPILEDP (value) | |
869 | || (CONSP (value) && EQ (XCAR (value), Qlambda))) | |
870 | break; | |
871 | return 0; | |
872 | ||
873 | case IMAGE_NUMBER_VALUE: | |
874 | if (!INTEGERP (value) && !FLOATP (value)) | |
875 | return 0; | |
876 | break; | |
877 | ||
878 | case IMAGE_INTEGER_VALUE: | |
879 | if (!INTEGERP (value)) | |
880 | return 0; | |
881 | break; | |
882 | ||
883 | case IMAGE_BOOL_VALUE: | |
884 | if (!NILP (value) && !EQ (value, Qt)) | |
885 | return 0; | |
886 | break; | |
887 | ||
888 | default: | |
889 | abort (); | |
890 | break; | |
891 | } | |
892 | ||
893 | if (EQ (key, QCtype) && !EQ (type, value)) | |
894 | return 0; | |
895 | } | |
896 | ||
897 | /* Check that all mandatory fields are present. */ | |
898 | for (i = 0; i < nkeywords; ++i) | |
899 | if (keywords[i].mandatory_p && keywords[i].count == 0) | |
900 | return 0; | |
901 | ||
902 | return NILP (plist); | |
903 | } | |
904 | ||
905 | ||
906 | /* Return the value of KEY in image specification SPEC. Value is nil | |
907 | if KEY is not present in SPEC. if FOUND is not null, set *FOUND | |
908 | to 1 if KEY was found in SPEC, set it to 0 otherwise. */ | |
909 | ||
910 | static Lisp_Object | |
911 | image_spec_value (spec, key, found) | |
912 | Lisp_Object spec, key; | |
913 | int *found; | |
914 | { | |
915 | Lisp_Object tail; | |
916 | ||
917 | xassert (valid_image_p (spec)); | |
918 | ||
919 | for (tail = XCDR (spec); | |
920 | CONSP (tail) && CONSP (XCDR (tail)); | |
921 | tail = XCDR (XCDR (tail))) | |
922 | { | |
923 | if (EQ (XCAR (tail), key)) | |
924 | { | |
925 | if (found) | |
926 | *found = 1; | |
927 | return XCAR (XCDR (tail)); | |
928 | } | |
929 | } | |
930 | ||
931 | if (found) | |
932 | *found = 0; | |
933 | return Qnil; | |
934 | } | |
935 | ||
936 | ||
937 | DEFUN ("image-size", Fimage_size, Simage_size, 1, 3, 0, | |
938 | doc: /* Return the size of image SPEC as pair (WIDTH . HEIGHT). | |
939 | PIXELS non-nil means return the size in pixels, otherwise return the | |
940 | size in canonical character units. | |
941 | FRAME is the frame on which the image will be displayed. FRAME nil | |
942 | or omitted means use the selected frame. */) | |
943 | (spec, pixels, frame) | |
944 | Lisp_Object spec, pixels, frame; | |
945 | { | |
946 | Lisp_Object size; | |
947 | ||
948 | size = Qnil; | |
949 | if (valid_image_p (spec)) | |
950 | { | |
951 | struct frame *f = check_x_frame (frame); | |
952 | int id = lookup_image (f, spec); | |
953 | struct image *img = IMAGE_FROM_ID (f, id); | |
954 | int width = img->width + 2 * img->hmargin; | |
955 | int height = img->height + 2 * img->vmargin; | |
956 | ||
957 | if (NILP (pixels)) | |
958 | size = Fcons (make_float ((double) width / FRAME_COLUMN_WIDTH (f)), | |
959 | make_float ((double) height / FRAME_LINE_HEIGHT (f))); | |
960 | else | |
961 | size = Fcons (make_number (width), make_number (height)); | |
962 | } | |
963 | else | |
964 | error ("Invalid image specification"); | |
965 | ||
966 | return size; | |
967 | } | |
968 | ||
969 | ||
970 | DEFUN ("image-mask-p", Fimage_mask_p, Simage_mask_p, 1, 2, 0, | |
971 | doc: /* Return t if image SPEC has a mask bitmap. | |
972 | FRAME is the frame on which the image will be displayed. FRAME nil | |
973 | or omitted means use the selected frame. */) | |
974 | (spec, frame) | |
975 | Lisp_Object spec, frame; | |
976 | { | |
977 | Lisp_Object mask; | |
978 | ||
979 | mask = Qnil; | |
980 | if (valid_image_p (spec)) | |
981 | { | |
982 | struct frame *f = check_x_frame (frame); | |
983 | int id = lookup_image (f, spec); | |
984 | struct image *img = IMAGE_FROM_ID (f, id); | |
985 | if (img->mask) | |
986 | mask = Qt; | |
987 | } | |
988 | else | |
989 | error ("Invalid image specification"); | |
990 | ||
991 | return mask; | |
992 | } | |
993 | ||
994 | \f | |
995 | /*********************************************************************** | |
996 | Image type independent image structures | |
997 | ***********************************************************************/ | |
998 | ||
999 | static struct image *make_image P_ ((Lisp_Object spec, unsigned hash)); | |
1000 | static void free_image P_ ((struct frame *f, struct image *img)); | |
1001 | ||
1002 | ||
1003 | /* Allocate and return a new image structure for image specification | |
1004 | SPEC. SPEC has a hash value of HASH. */ | |
1005 | ||
1006 | static struct image * | |
1007 | make_image (spec, hash) | |
1008 | Lisp_Object spec; | |
1009 | unsigned hash; | |
1010 | { | |
1011 | struct image *img = (struct image *) xmalloc (sizeof *img); | |
1012 | ||
1013 | xassert (valid_image_p (spec)); | |
1014 | bzero (img, sizeof *img); | |
1015 | img->type = lookup_image_type (image_spec_value (spec, QCtype, NULL)); | |
1016 | xassert (img->type != NULL); | |
1017 | img->spec = spec; | |
1018 | img->data.lisp_val = Qnil; | |
1019 | img->ascent = DEFAULT_IMAGE_ASCENT; | |
1020 | img->hash = hash; | |
1021 | return img; | |
1022 | } | |
1023 | ||
1024 | ||
1025 | /* Free image IMG which was used on frame F, including its resources. */ | |
1026 | ||
1027 | static void | |
1028 | free_image (f, img) | |
1029 | struct frame *f; | |
1030 | struct image *img; | |
1031 | { | |
1032 | if (img) | |
1033 | { | |
1034 | struct image_cache *c = FRAME_X_IMAGE_CACHE (f); | |
1035 | ||
1036 | /* Remove IMG from the hash table of its cache. */ | |
1037 | if (img->prev) | |
1038 | img->prev->next = img->next; | |
1039 | else | |
1040 | c->buckets[img->hash % IMAGE_CACHE_BUCKETS_SIZE] = img->next; | |
1041 | ||
1042 | if (img->next) | |
1043 | img->next->prev = img->prev; | |
1044 | ||
1045 | c->images[img->id] = NULL; | |
1046 | ||
1047 | /* Free resources, then free IMG. */ | |
1048 | img->type->free (f, img); | |
1049 | xfree (img); | |
1050 | } | |
1051 | } | |
1052 | ||
1053 | ||
1054 | /* Prepare image IMG for display on frame F. Must be called before | |
1055 | drawing an image. */ | |
1056 | ||
1057 | void | |
1058 | prepare_image_for_display (f, img) | |
1059 | struct frame *f; | |
1060 | struct image *img; | |
1061 | { | |
1062 | EMACS_TIME t; | |
1063 | ||
1064 | /* We're about to display IMG, so set its timestamp to `now'. */ | |
1065 | EMACS_GET_TIME (t); | |
1066 | img->timestamp = EMACS_SECS (t); | |
1067 | ||
1068 | /* If IMG doesn't have a pixmap yet, load it now, using the image | |
1069 | type dependent loader function. */ | |
1070 | if (img->pixmap == NO_PIXMAP && !img->load_failed_p) | |
1071 | img->load_failed_p = img->type->load (f, img) == 0; | |
1072 | } | |
1073 | ||
1074 | ||
1075 | /* Value is the number of pixels for the ascent of image IMG when | |
1076 | drawn in face FACE. */ | |
1077 | ||
1078 | int | |
1938bc36 | 1079 | image_ascent (img, face, slice) |
4ef0d4d0 KS |
1080 | struct image *img; |
1081 | struct face *face; | |
1938bc36 | 1082 | struct glyph_slice *slice; |
4ef0d4d0 | 1083 | { |
1938bc36 | 1084 | int height; |
4ef0d4d0 KS |
1085 | int ascent; |
1086 | ||
1938bc36 KS |
1087 | if (slice->height == img->height) |
1088 | height = img->height + img->vmargin; | |
1089 | else if (slice->y == 0) | |
1090 | height = slice->height + img->vmargin; | |
1091 | else | |
1092 | height = slice->height; | |
1093 | ||
4ef0d4d0 KS |
1094 | if (img->ascent == CENTERED_IMAGE_ASCENT) |
1095 | { | |
1096 | if (face->font) | |
1097 | { | |
1098 | #ifdef HAVE_NTGUI | |
1099 | /* W32 specific version. Why?. ++kfs */ | |
1100 | ascent = height / 2 - (FONT_DESCENT(face->font) | |
1101 | - FONT_BASE(face->font)) / 2; | |
1102 | #else | |
1103 | /* This expression is arranged so that if the image can't be | |
1104 | exactly centered, it will be moved slightly up. This is | |
1105 | because a typical font is `top-heavy' (due to the presence | |
1106 | uppercase letters), so the image placement should err towards | |
1107 | being top-heavy too. It also just generally looks better. */ | |
1108 | ascent = (height + face->font->ascent - face->font->descent + 1) / 2; | |
1109 | #endif /* HAVE_NTGUI */ | |
1110 | } | |
1111 | else | |
1112 | ascent = height / 2; | |
1113 | } | |
1114 | else | |
1115 | ascent = (int) (height * img->ascent / 100.0); | |
1116 | ||
1117 | return ascent; | |
1118 | } | |
1119 | ||
1120 | \f | |
1121 | /* Image background colors. */ | |
1122 | ||
1123 | /* Find the "best" corner color of a bitmap. | |
1124 | On W32, XIMG is assumed to a device context with the bitmap selected. */ | |
1125 | ||
1126 | static RGB_PIXEL_COLOR | |
1127 | four_corners_best (ximg, width, height) | |
1128 | XImagePtr_or_DC ximg; | |
1129 | unsigned long width, height; | |
1130 | { | |
1131 | RGB_PIXEL_COLOR corners[4], best; | |
1132 | int i, best_count; | |
1133 | ||
1134 | /* Get the colors at the corners of ximg. */ | |
1135 | corners[0] = GET_PIXEL (ximg, 0, 0); | |
1136 | corners[1] = GET_PIXEL (ximg, width - 1, 0); | |
1137 | corners[2] = GET_PIXEL (ximg, width - 1, height - 1); | |
1138 | corners[3] = GET_PIXEL (ximg, 0, height - 1); | |
1139 | ||
1140 | /* Choose the most frequently found color as background. */ | |
1141 | for (i = best_count = 0; i < 4; ++i) | |
1142 | { | |
1143 | int j, n; | |
1144 | ||
1145 | for (j = n = 0; j < 4; ++j) | |
1146 | if (corners[i] == corners[j]) | |
1147 | ++n; | |
1148 | ||
1149 | if (n > best_count) | |
1150 | best = corners[i], best_count = n; | |
1151 | } | |
1152 | ||
1153 | return best; | |
1154 | } | |
1155 | ||
1156 | /* Portability macros */ | |
1157 | ||
1158 | #ifdef HAVE_NTGUI | |
1159 | ||
1160 | #define Destroy_Image(img_dc, prev) \ | |
1161 | do { SelectObject (img_dc, prev); DeleteDC (img_dc); } while (0) | |
1162 | ||
1163 | #define Free_Pixmap(display, pixmap) \ | |
1164 | DeleteObject (pixmap) | |
1165 | ||
1166 | #else | |
1167 | ||
1168 | #define Destroy_Image(ximg, dummy) \ | |
1169 | XDestroyImage (ximg) | |
1170 | ||
1171 | #define Free_Pixmap(display, pixmap) \ | |
1172 | XFreePixmap (display, pixmap) | |
1173 | ||
1174 | #endif /* HAVE_NTGUI */ | |
1175 | ||
1176 | ||
1177 | /* Return the `background' field of IMG. If IMG doesn't have one yet, | |
1178 | it is guessed heuristically. If non-zero, XIMG is an existing | |
1179 | XImage object (or device context with the image selected on W32) to | |
1f026899 | 1180 | use for the heuristic. */ |
4ef0d4d0 KS |
1181 | |
1182 | RGB_PIXEL_COLOR | |
1183 | image_background (img, f, ximg) | |
1184 | struct image *img; | |
1185 | struct frame *f; | |
1186 | XImagePtr_or_DC ximg; | |
1187 | { | |
1188 | if (! img->background_valid) | |
1189 | /* IMG doesn't have a background yet, try to guess a reasonable value. */ | |
1190 | { | |
1191 | int free_ximg = !ximg; | |
1192 | #ifdef HAVE_NTGUI | |
1193 | HGDIOBJ prev; | |
1194 | #endif /* HAVE_NTGUI */ | |
1195 | ||
1196 | if (free_ximg) | |
1197 | { | |
1198 | #ifndef HAVE_NTGUI | |
1199 | ximg = XGetImage (FRAME_X_DISPLAY (f), img->pixmap, | |
1200 | 0, 0, img->width, img->height, ~0, ZPixmap); | |
1201 | #else | |
1202 | HDC frame_dc = get_frame_dc (f); | |
1203 | ximg = CreateCompatibleDC (frame_dc); | |
1204 | release_frame_dc (f, frame_dc); | |
1205 | prev = SelectObject (ximg, img->pixmap); | |
1206 | #endif /* !HAVE_NTGUI */ | |
1207 | } | |
1208 | ||
1209 | img->background = four_corners_best (ximg, img->width, img->height); | |
1210 | ||
1211 | if (free_ximg) | |
1212 | Destroy_Image (ximg, prev); | |
1f026899 | 1213 | |
4ef0d4d0 KS |
1214 | img->background_valid = 1; |
1215 | } | |
1216 | ||
1217 | return img->background; | |
1218 | } | |
1219 | ||
1220 | /* Return the `background_transparent' field of IMG. If IMG doesn't | |
1221 | have one yet, it is guessed heuristically. If non-zero, MASK is an | |
1222 | existing XImage object to use for the heuristic. */ | |
1223 | ||
1224 | int | |
1225 | image_background_transparent (img, f, mask) | |
1226 | struct image *img; | |
1227 | struct frame *f; | |
1228 | XImagePtr_or_DC mask; | |
1229 | { | |
1230 | if (! img->background_transparent_valid) | |
1231 | /* IMG doesn't have a background yet, try to guess a reasonable value. */ | |
1232 | { | |
1233 | if (img->mask) | |
1234 | { | |
1235 | int free_mask = !mask; | |
1236 | #ifdef HAVE_NTGUI | |
1237 | HGDIOBJ prev; | |
1238 | #endif /* HAVE_NTGUI */ | |
1239 | ||
1240 | if (free_mask) | |
1241 | { | |
1242 | #ifndef HAVE_NTGUI | |
1243 | mask = XGetImage (FRAME_X_DISPLAY (f), img->mask, | |
1244 | 0, 0, img->width, img->height, ~0, ZPixmap); | |
1245 | #else | |
1246 | HDC frame_dc = get_frame_dc (f); | |
1247 | mask = CreateCompatibleDC (frame_dc); | |
1248 | release_frame_dc (f, frame_dc); | |
1249 | prev = SelectObject (mask, img->mask); | |
1250 | #endif /* HAVE_NTGUI */ | |
1251 | } | |
1252 | ||
1253 | img->background_transparent | |
1254 | = (four_corners_best (mask, img->width, img->height) == PIX_MASK_RETAIN (f)); | |
1255 | ||
1256 | if (free_mask) | |
1257 | Destroy_Image (mask, prev); | |
1258 | } | |
1259 | else | |
1260 | img->background_transparent = 0; | |
1261 | ||
1262 | img->background_transparent_valid = 1; | |
1263 | } | |
1264 | ||
1265 | return img->background_transparent; | |
1266 | } | |
1267 | ||
1268 | \f | |
1269 | /*********************************************************************** | |
1270 | Helper functions for X image types | |
1271 | ***********************************************************************/ | |
1272 | ||
1273 | static void x_clear_image_1 P_ ((struct frame *, struct image *, int, | |
1274 | int, int)); | |
1275 | static void x_clear_image P_ ((struct frame *f, struct image *img)); | |
1276 | static unsigned long x_alloc_image_color P_ ((struct frame *f, | |
1277 | struct image *img, | |
1278 | Lisp_Object color_name, | |
1279 | unsigned long dflt)); | |
1280 | ||
1281 | ||
1282 | /* Clear X resources of image IMG on frame F. PIXMAP_P non-zero means | |
1283 | free the pixmap if any. MASK_P non-zero means clear the mask | |
1284 | pixmap if any. COLORS_P non-zero means free colors allocated for | |
1285 | the image, if any. */ | |
1286 | ||
1287 | static void | |
1288 | x_clear_image_1 (f, img, pixmap_p, mask_p, colors_p) | |
1289 | struct frame *f; | |
1290 | struct image *img; | |
1291 | int pixmap_p, mask_p, colors_p; | |
1292 | { | |
1293 | if (pixmap_p && img->pixmap) | |
1294 | { | |
1295 | Free_Pixmap (FRAME_X_DISPLAY (f), img->pixmap); | |
1296 | img->pixmap = NO_PIXMAP; | |
1297 | img->background_valid = 0; | |
1298 | } | |
1299 | ||
1300 | if (mask_p && img->mask) | |
1301 | { | |
1302 | Free_Pixmap (FRAME_X_DISPLAY (f), img->mask); | |
1303 | img->mask = NO_PIXMAP; | |
1304 | img->background_transparent_valid = 0; | |
1305 | } | |
1306 | ||
1307 | if (colors_p && img->ncolors) | |
1308 | { | |
1309 | /* MAC_TODO: color table support. */ | |
1310 | /* W32_TODO: color table support. */ | |
1311 | #ifdef HAVE_X_WINDOWS | |
1312 | x_free_colors (f, img->colors, img->ncolors); | |
1313 | #endif /* HAVE_X_WINDOWS */ | |
1314 | xfree (img->colors); | |
1315 | img->colors = NULL; | |
1316 | img->ncolors = 0; | |
1317 | } | |
1318 | } | |
1319 | ||
1320 | /* Free X resources of image IMG which is used on frame F. */ | |
1321 | ||
1322 | static void | |
1323 | x_clear_image (f, img) | |
1324 | struct frame *f; | |
1325 | struct image *img; | |
1326 | { | |
1327 | BLOCK_INPUT; | |
1328 | x_clear_image_1 (f, img, 1, 1, 1); | |
1329 | UNBLOCK_INPUT; | |
1330 | } | |
1331 | ||
1332 | ||
1333 | /* Allocate color COLOR_NAME for image IMG on frame F. If color | |
1334 | cannot be allocated, use DFLT. Add a newly allocated color to | |
1335 | IMG->colors, so that it can be freed again. Value is the pixel | |
1336 | color. */ | |
1337 | ||
1338 | static unsigned long | |
1339 | x_alloc_image_color (f, img, color_name, dflt) | |
1340 | struct frame *f; | |
1341 | struct image *img; | |
1342 | Lisp_Object color_name; | |
1343 | unsigned long dflt; | |
1344 | { | |
1345 | XColor color; | |
1346 | unsigned long result; | |
1347 | ||
1348 | xassert (STRINGP (color_name)); | |
1349 | ||
1350 | if (x_defined_color (f, SDATA (color_name), &color, 1)) | |
1351 | { | |
1352 | /* This isn't called frequently so we get away with simply | |
1353 | reallocating the color vector to the needed size, here. */ | |
1354 | ++img->ncolors; | |
1355 | img->colors = | |
1356 | (unsigned long *) xrealloc (img->colors, | |
1357 | img->ncolors * sizeof *img->colors); | |
1358 | img->colors[img->ncolors - 1] = color.pixel; | |
1359 | result = color.pixel; | |
1360 | } | |
1361 | else | |
1362 | result = dflt; | |
1363 | ||
1364 | return result; | |
1365 | } | |
1366 | ||
1367 | ||
1368 | \f | |
1369 | /*********************************************************************** | |
1370 | Image Cache | |
1371 | ***********************************************************************/ | |
1372 | ||
1373 | static void cache_image P_ ((struct frame *f, struct image *img)); | |
1374 | static void postprocess_image P_ ((struct frame *, struct image *)); | |
1375 | ||
1376 | /* Return a new, initialized image cache that is allocated from the | |
1377 | heap. Call free_image_cache to free an image cache. */ | |
1378 | ||
1379 | struct image_cache * | |
1380 | make_image_cache () | |
1381 | { | |
1382 | struct image_cache *c = (struct image_cache *) xmalloc (sizeof *c); | |
1383 | int size; | |
1384 | ||
1385 | bzero (c, sizeof *c); | |
1386 | c->size = 50; | |
1387 | c->images = (struct image **) xmalloc (c->size * sizeof *c->images); | |
1388 | size = IMAGE_CACHE_BUCKETS_SIZE * sizeof *c->buckets; | |
1389 | c->buckets = (struct image **) xmalloc (size); | |
1390 | bzero (c->buckets, size); | |
1391 | return c; | |
1392 | } | |
1393 | ||
1394 | ||
1395 | /* Free image cache of frame F. Be aware that X frames share images | |
1396 | caches. */ | |
1397 | ||
1398 | void | |
1399 | free_image_cache (f) | |
1400 | struct frame *f; | |
1401 | { | |
1402 | struct image_cache *c = FRAME_X_IMAGE_CACHE (f); | |
1403 | if (c) | |
1404 | { | |
1405 | int i; | |
1406 | ||
1407 | /* Cache should not be referenced by any frame when freed. */ | |
1408 | xassert (c->refcount == 0); | |
1409 | ||
1410 | for (i = 0; i < c->used; ++i) | |
1411 | free_image (f, c->images[i]); | |
1412 | xfree (c->images); | |
1413 | xfree (c->buckets); | |
1414 | xfree (c); | |
1415 | FRAME_X_IMAGE_CACHE (f) = NULL; | |
1416 | } | |
1417 | } | |
1418 | ||
1419 | ||
1420 | /* Clear image cache of frame F. FORCE_P non-zero means free all | |
1421 | images. FORCE_P zero means clear only images that haven't been | |
1422 | displayed for some time. Should be called from time to time to | |
1423 | reduce the number of loaded images. If image-eviction-seconds is | |
1424 | non-nil, this frees images in the cache which weren't displayed for | |
1425 | at least that many seconds. */ | |
1426 | ||
1427 | void | |
1428 | clear_image_cache (f, force_p) | |
1429 | struct frame *f; | |
1430 | int force_p; | |
1431 | { | |
1432 | struct image_cache *c = FRAME_X_IMAGE_CACHE (f); | |
1433 | ||
1434 | if (c && INTEGERP (Vimage_cache_eviction_delay)) | |
1435 | { | |
1436 | EMACS_TIME t; | |
1437 | unsigned long old; | |
1438 | int i, nfreed; | |
1439 | ||
1440 | EMACS_GET_TIME (t); | |
1441 | old = EMACS_SECS (t) - XFASTINT (Vimage_cache_eviction_delay); | |
1442 | ||
1443 | /* Block input so that we won't be interrupted by a SIGIO | |
1444 | while being in an inconsistent state. */ | |
1445 | BLOCK_INPUT; | |
1446 | ||
1447 | for (i = nfreed = 0; i < c->used; ++i) | |
1448 | { | |
1449 | struct image *img = c->images[i]; | |
1450 | if (img != NULL | |
1451 | && (force_p || img->timestamp < old)) | |
1452 | { | |
1453 | free_image (f, img); | |
1454 | ++nfreed; | |
1455 | } | |
1456 | } | |
1457 | ||
1458 | /* We may be clearing the image cache because, for example, | |
1459 | Emacs was iconified for a longer period of time. In that | |
1460 | case, current matrices may still contain references to | |
1461 | images freed above. So, clear these matrices. */ | |
1462 | if (nfreed) | |
1463 | { | |
1464 | Lisp_Object tail, frame; | |
1465 | ||
1466 | FOR_EACH_FRAME (tail, frame) | |
1467 | { | |
1468 | struct frame *f = XFRAME (frame); | |
1469 | if (FRAME_WINDOW_P (f) | |
1470 | && FRAME_X_IMAGE_CACHE (f) == c) | |
1471 | clear_current_matrices (f); | |
1472 | } | |
1473 | ||
1474 | ++windows_or_buffers_changed; | |
1475 | } | |
1476 | ||
1477 | UNBLOCK_INPUT; | |
1478 | } | |
1479 | } | |
1480 | ||
1481 | ||
1482 | DEFUN ("clear-image-cache", Fclear_image_cache, Sclear_image_cache, | |
1483 | 0, 1, 0, | |
1484 | doc: /* Clear the image cache of FRAME. | |
1485 | FRAME nil or omitted means use the selected frame. | |
1486 | FRAME t means clear the image caches of all frames. */) | |
1487 | (frame) | |
1488 | Lisp_Object frame; | |
1489 | { | |
1490 | if (EQ (frame, Qt)) | |
1491 | { | |
1492 | Lisp_Object tail; | |
1493 | ||
1494 | FOR_EACH_FRAME (tail, frame) | |
1495 | if (FRAME_WINDOW_P (XFRAME (frame))) | |
1496 | clear_image_cache (XFRAME (frame), 1); | |
1497 | } | |
1498 | else | |
1499 | clear_image_cache (check_x_frame (frame), 1); | |
1500 | ||
1501 | return Qnil; | |
1502 | } | |
1503 | ||
1504 | ||
1505 | /* Compute masks and transform image IMG on frame F, as specified | |
1506 | by the image's specification, */ | |
1507 | ||
1508 | static void | |
1509 | postprocess_image (f, img) | |
1510 | struct frame *f; | |
1511 | struct image *img; | |
1512 | { | |
1513 | /* Manipulation of the image's mask. */ | |
1514 | if (img->pixmap) | |
1515 | { | |
1516 | Lisp_Object conversion, spec; | |
1517 | Lisp_Object mask; | |
1518 | ||
1519 | spec = img->spec; | |
1520 | ||
1521 | /* `:heuristic-mask t' | |
1522 | `:mask heuristic' | |
1523 | means build a mask heuristically. | |
1524 | `:heuristic-mask (R G B)' | |
1525 | `:mask (heuristic (R G B))' | |
1526 | means build a mask from color (R G B) in the | |
1527 | image. | |
1528 | `:mask nil' | |
1529 | means remove a mask, if any. */ | |
1530 | ||
1531 | mask = image_spec_value (spec, QCheuristic_mask, NULL); | |
1532 | if (!NILP (mask)) | |
1533 | x_build_heuristic_mask (f, img, mask); | |
1534 | else | |
1535 | { | |
1536 | int found_p; | |
1537 | ||
1538 | mask = image_spec_value (spec, QCmask, &found_p); | |
1539 | ||
1540 | if (EQ (mask, Qheuristic)) | |
1541 | x_build_heuristic_mask (f, img, Qt); | |
1542 | else if (CONSP (mask) | |
1543 | && EQ (XCAR (mask), Qheuristic)) | |
1544 | { | |
1545 | if (CONSP (XCDR (mask))) | |
1546 | x_build_heuristic_mask (f, img, XCAR (XCDR (mask))); | |
1547 | else | |
1548 | x_build_heuristic_mask (f, img, XCDR (mask)); | |
1549 | } | |
1550 | else if (NILP (mask) && found_p && img->mask) | |
1551 | { | |
1552 | Free_Pixmap (FRAME_X_DISPLAY (f), img->mask); | |
1553 | img->mask = NO_PIXMAP; | |
1554 | } | |
1555 | } | |
1556 | ||
1557 | ||
1558 | /* Should we apply an image transformation algorithm? */ | |
1559 | conversion = image_spec_value (spec, QCconversion, NULL); | |
1560 | if (EQ (conversion, Qdisabled)) | |
1561 | x_disable_image (f, img); | |
1562 | else if (EQ (conversion, Qlaplace)) | |
1563 | x_laplace (f, img); | |
1564 | else if (EQ (conversion, Qemboss)) | |
1565 | x_emboss (f, img); | |
1566 | else if (CONSP (conversion) | |
1567 | && EQ (XCAR (conversion), Qedge_detection)) | |
1568 | { | |
1569 | Lisp_Object tem; | |
1570 | tem = XCDR (conversion); | |
1571 | if (CONSP (tem)) | |
1572 | x_edge_detection (f, img, | |
1573 | Fplist_get (tem, QCmatrix), | |
1574 | Fplist_get (tem, QCcolor_adjustment)); | |
1575 | } | |
1576 | } | |
1577 | } | |
1578 | ||
1579 | ||
1580 | /* Return the id of image with Lisp specification SPEC on frame F. | |
1581 | SPEC must be a valid Lisp image specification (see valid_image_p). */ | |
1582 | ||
1583 | int | |
1584 | lookup_image (f, spec) | |
1585 | struct frame *f; | |
1586 | Lisp_Object spec; | |
1587 | { | |
1588 | struct image_cache *c = FRAME_X_IMAGE_CACHE (f); | |
1589 | struct image *img; | |
1590 | int i; | |
1591 | unsigned hash; | |
1592 | struct gcpro gcpro1; | |
1593 | EMACS_TIME now; | |
1594 | ||
1595 | /* F must be a window-system frame, and SPEC must be a valid image | |
1596 | specification. */ | |
1597 | xassert (FRAME_WINDOW_P (f)); | |
1598 | xassert (valid_image_p (spec)); | |
1599 | ||
1600 | GCPRO1 (spec); | |
1601 | ||
1602 | /* Look up SPEC in the hash table of the image cache. */ | |
1603 | hash = sxhash (spec, 0); | |
1604 | i = hash % IMAGE_CACHE_BUCKETS_SIZE; | |
1605 | ||
1606 | for (img = c->buckets[i]; img; img = img->next) | |
1607 | if (img->hash == hash && !NILP (Fequal (img->spec, spec))) | |
1608 | break; | |
1609 | ||
1610 | /* If not found, create a new image and cache it. */ | |
1611 | if (img == NULL) | |
1612 | { | |
1613 | extern Lisp_Object Qpostscript; | |
1614 | ||
1615 | BLOCK_INPUT; | |
1616 | img = make_image (spec, hash); | |
1617 | cache_image (f, img); | |
1618 | img->load_failed_p = img->type->load (f, img) == 0; | |
1619 | ||
1620 | /* If we can't load the image, and we don't have a width and | |
1621 | height, use some arbitrary width and height so that we can | |
1622 | draw a rectangle for it. */ | |
1623 | if (img->load_failed_p) | |
1624 | { | |
1625 | Lisp_Object value; | |
1626 | ||
1627 | value = image_spec_value (spec, QCwidth, NULL); | |
1628 | img->width = (INTEGERP (value) | |
1629 | ? XFASTINT (value) : DEFAULT_IMAGE_WIDTH); | |
1630 | value = image_spec_value (spec, QCheight, NULL); | |
1631 | img->height = (INTEGERP (value) | |
1632 | ? XFASTINT (value) : DEFAULT_IMAGE_HEIGHT); | |
1633 | } | |
1634 | else | |
1635 | { | |
1636 | /* Handle image type independent image attributes | |
1637 | `:ascent ASCENT', `:margin MARGIN', `:relief RELIEF', | |
1638 | `:background COLOR'. */ | |
1639 | Lisp_Object ascent, margin, relief, bg; | |
1640 | ||
1641 | ascent = image_spec_value (spec, QCascent, NULL); | |
1642 | if (INTEGERP (ascent)) | |
1643 | img->ascent = XFASTINT (ascent); | |
1644 | else if (EQ (ascent, Qcenter)) | |
1645 | img->ascent = CENTERED_IMAGE_ASCENT; | |
1646 | ||
1647 | margin = image_spec_value (spec, QCmargin, NULL); | |
1648 | if (INTEGERP (margin) && XINT (margin) >= 0) | |
1649 | img->vmargin = img->hmargin = XFASTINT (margin); | |
1650 | else if (CONSP (margin) && INTEGERP (XCAR (margin)) | |
1651 | && INTEGERP (XCDR (margin))) | |
1652 | { | |
1653 | if (XINT (XCAR (margin)) > 0) | |
1654 | img->hmargin = XFASTINT (XCAR (margin)); | |
1655 | if (XINT (XCDR (margin)) > 0) | |
1656 | img->vmargin = XFASTINT (XCDR (margin)); | |
1657 | } | |
1658 | ||
1659 | relief = image_spec_value (spec, QCrelief, NULL); | |
1660 | if (INTEGERP (relief)) | |
1661 | { | |
1662 | img->relief = XINT (relief); | |
1663 | img->hmargin += abs (img->relief); | |
1664 | img->vmargin += abs (img->relief); | |
1665 | } | |
1666 | ||
1667 | if (! img->background_valid) | |
1668 | { | |
1669 | bg = image_spec_value (img->spec, QCbackground, NULL); | |
1670 | if (!NILP (bg)) | |
1671 | { | |
1672 | img->background | |
1673 | = x_alloc_image_color (f, img, bg, | |
1674 | FRAME_BACKGROUND_PIXEL (f)); | |
1675 | img->background_valid = 1; | |
1676 | } | |
1677 | } | |
1678 | ||
1679 | /* Do image transformations and compute masks, unless we | |
1680 | don't have the image yet. */ | |
1681 | if (!EQ (*img->type->type, Qpostscript)) | |
1682 | postprocess_image (f, img); | |
1683 | } | |
1684 | ||
1685 | UNBLOCK_INPUT; | |
1686 | } | |
1687 | ||
1688 | /* We're using IMG, so set its timestamp to `now'. */ | |
1689 | EMACS_GET_TIME (now); | |
1690 | img->timestamp = EMACS_SECS (now); | |
1691 | ||
1692 | UNGCPRO; | |
1693 | ||
1694 | /* Value is the image id. */ | |
1695 | return img->id; | |
1696 | } | |
1697 | ||
1698 | ||
1699 | /* Cache image IMG in the image cache of frame F. */ | |
1700 | ||
1701 | static void | |
1702 | cache_image (f, img) | |
1703 | struct frame *f; | |
1704 | struct image *img; | |
1705 | { | |
1706 | struct image_cache *c = FRAME_X_IMAGE_CACHE (f); | |
1707 | int i; | |
1708 | ||
1709 | /* Find a free slot in c->images. */ | |
1710 | for (i = 0; i < c->used; ++i) | |
1711 | if (c->images[i] == NULL) | |
1712 | break; | |
1713 | ||
1714 | /* If no free slot found, maybe enlarge c->images. */ | |
1715 | if (i == c->used && c->used == c->size) | |
1716 | { | |
1717 | c->size *= 2; | |
1718 | c->images = (struct image **) xrealloc (c->images, | |
1719 | c->size * sizeof *c->images); | |
1720 | } | |
1721 | ||
1722 | /* Add IMG to c->images, and assign IMG an id. */ | |
1723 | c->images[i] = img; | |
1724 | img->id = i; | |
1725 | if (i == c->used) | |
1726 | ++c->used; | |
1727 | ||
1728 | /* Add IMG to the cache's hash table. */ | |
1729 | i = img->hash % IMAGE_CACHE_BUCKETS_SIZE; | |
1730 | img->next = c->buckets[i]; | |
1731 | if (img->next) | |
1732 | img->next->prev = img; | |
1733 | img->prev = NULL; | |
1734 | c->buckets[i] = img; | |
1735 | } | |
1736 | ||
1737 | ||
1738 | /* Call FN on every image in the image cache of frame F. Used to mark | |
1739 | Lisp Objects in the image cache. */ | |
1740 | ||
1741 | void | |
1742 | forall_images_in_image_cache (f, fn) | |
1743 | struct frame *f; | |
1744 | void (*fn) P_ ((struct image *img)); | |
1745 | { | |
1746 | if (FRAME_LIVE_P (f) && FRAME_WINDOW_P (f)) | |
1747 | { | |
1748 | struct image_cache *c = FRAME_X_IMAGE_CACHE (f); | |
1749 | if (c) | |
1750 | { | |
1751 | int i; | |
1752 | for (i = 0; i < c->used; ++i) | |
1753 | if (c->images[i]) | |
1754 | fn (c->images[i]); | |
1755 | } | |
1756 | } | |
1757 | } | |
1758 | ||
1759 | ||
1760 | \f | |
1761 | /*********************************************************************** | |
1762 | X / MAC / W32 support code | |
1763 | ***********************************************************************/ | |
1764 | ||
1765 | #ifdef HAVE_NTGUI | |
1766 | ||
1767 | /* Macro for defining functions that will be loaded from image DLLs. */ | |
1768 | #define DEF_IMGLIB_FN(func) FARPROC fn_##func | |
1769 | ||
1770 | /* Macro for loading those image functions from the library. */ | |
1771 | #define LOAD_IMGLIB_FN(lib,func) { \ | |
1772 | fn_##func = (void *) GetProcAddress (lib, #func); \ | |
1773 | if (!fn_##func) return 0; \ | |
1774 | } | |
1775 | ||
1776 | #endif /* HAVE_NTGUI */ | |
1777 | ||
1778 | static int x_create_x_image_and_pixmap P_ ((struct frame *, int, int, int, | |
1779 | XImagePtr *, Pixmap *)); | |
1780 | static void x_destroy_x_image P_ ((XImagePtr)); | |
1781 | static void x_put_x_image P_ ((struct frame *, XImagePtr, Pixmap, int, int)); | |
1782 | ||
1783 | ||
1784 | /* Create an XImage and a pixmap of size WIDTH x HEIGHT for use on | |
1785 | frame F. Set *XIMG and *PIXMAP to the XImage and Pixmap created. | |
1786 | Set (*XIMG)->data to a raster of WIDTH x HEIGHT pixels allocated | |
1787 | via xmalloc. Print error messages via image_error if an error | |
1788 | occurs. Value is non-zero if successful. | |
1789 | ||
1790 | On W32, a DEPTH of zero signifies a 24 bit image, otherwise DEPTH | |
1791 | should indicate the bit depth of the image. */ | |
1792 | ||
1793 | static int | |
1794 | x_create_x_image_and_pixmap (f, width, height, depth, ximg, pixmap) | |
1795 | struct frame *f; | |
1796 | int width, height, depth; | |
1797 | XImagePtr *ximg; | |
1798 | Pixmap *pixmap; | |
1799 | { | |
1800 | #ifdef HAVE_X_WINDOWS | |
1801 | Display *display = FRAME_X_DISPLAY (f); | |
1802 | Window window = FRAME_X_WINDOW (f); | |
1803 | Screen *screen = FRAME_X_SCREEN (f); | |
1804 | ||
1805 | xassert (interrupt_input_blocked); | |
1806 | ||
1807 | if (depth <= 0) | |
1808 | depth = DefaultDepthOfScreen (screen); | |
1809 | *ximg = XCreateImage (display, DefaultVisualOfScreen (screen), | |
1810 | depth, ZPixmap, 0, NULL, width, height, | |
1811 | depth > 16 ? 32 : depth > 8 ? 16 : 8, 0); | |
1812 | if (*ximg == NULL) | |
1813 | { | |
1814 | image_error ("Unable to allocate X image", Qnil, Qnil); | |
1815 | return 0; | |
1816 | } | |
1817 | ||
1818 | /* Allocate image raster. */ | |
1819 | (*ximg)->data = (char *) xmalloc ((*ximg)->bytes_per_line * height); | |
1820 | ||
1821 | /* Allocate a pixmap of the same size. */ | |
1822 | *pixmap = XCreatePixmap (display, window, width, height, depth); | |
1823 | if (*pixmap == NO_PIXMAP) | |
1824 | { | |
1825 | x_destroy_x_image (*ximg); | |
1826 | *ximg = NULL; | |
1827 | image_error ("Unable to create X pixmap", Qnil, Qnil); | |
1828 | return 0; | |
1829 | } | |
1830 | ||
1831 | return 1; | |
1832 | #endif /* HAVE_X_WINDOWS */ | |
1833 | ||
1834 | #ifdef HAVE_NTGUI | |
1835 | ||
1836 | BITMAPINFOHEADER *header; | |
1837 | HDC hdc; | |
1838 | int scanline_width_bits; | |
1839 | int remainder; | |
1840 | int palette_colors = 0; | |
1841 | ||
1842 | if (depth == 0) | |
1843 | depth = 24; | |
1844 | ||
1845 | if (depth != 1 && depth != 4 && depth != 8 | |
1846 | && depth != 16 && depth != 24 && depth != 32) | |
1847 | { | |
1848 | image_error ("Invalid image bit depth specified", Qnil, Qnil); | |
1849 | return 0; | |
1850 | } | |
1851 | ||
1852 | scanline_width_bits = width * depth; | |
1853 | remainder = scanline_width_bits % 32; | |
1854 | ||
1855 | if (remainder) | |
1856 | scanline_width_bits += 32 - remainder; | |
1857 | ||
1858 | /* Bitmaps with a depth less than 16 need a palette. */ | |
1859 | /* BITMAPINFO structure already contains the first RGBQUAD. */ | |
1860 | if (depth < 16) | |
1861 | palette_colors = 1 << depth - 1; | |
1862 | ||
1863 | *ximg = xmalloc (sizeof (XImage) + palette_colors * sizeof (RGBQUAD)); | |
1864 | if (*ximg == NULL) | |
1865 | { | |
1866 | image_error ("Unable to allocate memory for XImage", Qnil, Qnil); | |
1867 | return 0; | |
1868 | } | |
1869 | ||
1870 | header = &((*ximg)->info.bmiHeader); | |
1871 | bzero (&((*ximg)->info), sizeof (BITMAPINFO)); | |
1872 | header->biSize = sizeof (*header); | |
1873 | header->biWidth = width; | |
1874 | header->biHeight = -height; /* negative indicates a top-down bitmap. */ | |
1875 | header->biPlanes = 1; | |
1876 | header->biBitCount = depth; | |
1877 | header->biCompression = BI_RGB; | |
1878 | header->biClrUsed = palette_colors; | |
1879 | ||
1880 | /* TODO: fill in palette. */ | |
1881 | if (depth == 1) | |
1882 | { | |
1883 | (*ximg)->info.bmiColors[0].rgbBlue = 0; | |
1884 | (*ximg)->info.bmiColors[0].rgbGreen = 0; | |
1885 | (*ximg)->info.bmiColors[0].rgbRed = 0; | |
1886 | (*ximg)->info.bmiColors[0].rgbReserved = 0; | |
1887 | (*ximg)->info.bmiColors[1].rgbBlue = 255; | |
1888 | (*ximg)->info.bmiColors[1].rgbGreen = 255; | |
1889 | (*ximg)->info.bmiColors[1].rgbRed = 255; | |
1890 | (*ximg)->info.bmiColors[1].rgbReserved = 0; | |
1891 | } | |
1892 | ||
1893 | hdc = get_frame_dc (f); | |
1894 | ||
1895 | /* Create a DIBSection and raster array for the bitmap, | |
1896 | and store its handle in *pixmap. */ | |
1897 | *pixmap = CreateDIBSection (hdc, &((*ximg)->info), | |
1898 | (depth < 16) ? DIB_PAL_COLORS : DIB_RGB_COLORS, | |
1899 | &((*ximg)->data), NULL, 0); | |
1900 | ||
1901 | /* Realize display palette and garbage all frames. */ | |
1902 | release_frame_dc (f, hdc); | |
1903 | ||
1904 | if (*pixmap == NULL) | |
1905 | { | |
1906 | DWORD err = GetLastError(); | |
1907 | Lisp_Object errcode; | |
1908 | /* All system errors are < 10000, so the following is safe. */ | |
1909 | XSETINT (errcode, (int) err); | |
1910 | image_error ("Unable to create bitmap, error code %d", errcode, Qnil); | |
1911 | x_destroy_x_image (*ximg); | |
1912 | return 0; | |
1913 | } | |
1914 | ||
1915 | return 1; | |
1916 | ||
1917 | #endif /* HAVE_NTGUI */ | |
1918 | ||
1919 | #ifdef MAC_OS | |
1920 | Display *display = FRAME_X_DISPLAY (f); | |
1921 | Window window = FRAME_X_WINDOW (f); | |
1922 | ||
1923 | xassert (interrupt_input_blocked); | |
1924 | ||
1925 | /* Allocate a pixmap of the same size. */ | |
1926 | *pixmap = XCreatePixmap (display, window, width, height, depth); | |
1927 | if (*pixmap == NO_PIXMAP) | |
1928 | { | |
1929 | x_destroy_x_image (*ximg); | |
1930 | *ximg = NULL; | |
1931 | image_error ("Unable to create X pixmap", Qnil, Qnil); | |
1932 | return 0; | |
1933 | } | |
1934 | ||
1935 | LockPixels (GetGWorldPixMap (*pixmap)); | |
1936 | *ximg = *pixmap; | |
1937 | return 1; | |
1938 | ||
1939 | #endif /* MAC_OS */ | |
1940 | } | |
1941 | ||
1942 | ||
1943 | /* Destroy XImage XIMG. Free XIMG->data. */ | |
1944 | ||
1945 | static void | |
1946 | x_destroy_x_image (ximg) | |
1947 | XImagePtr ximg; | |
1948 | { | |
1949 | xassert (interrupt_input_blocked); | |
1950 | if (ximg) | |
1951 | { | |
1952 | #ifdef HAVE_X_WINDOWS | |
1953 | xfree (ximg->data); | |
1954 | ximg->data = NULL; | |
1955 | XDestroyImage (ximg); | |
1956 | #endif /* HAVE_X_WINDOWS */ | |
1957 | #ifdef HAVE_NTGUI | |
1958 | /* Data will be freed by DestroyObject. */ | |
1959 | ximg->data = NULL; | |
1960 | xfree (ximg); | |
1961 | #endif /* HAVE_NTGUI */ | |
1962 | #ifdef MAC_OS | |
1963 | XDestroyImage (ximg); | |
1964 | #endif /* MAC_OS */ | |
1965 | } | |
1966 | } | |
1967 | ||
1968 | ||
1969 | /* Put XImage XIMG into pixmap PIXMAP on frame F. WIDTH and HEIGHT | |
1970 | are width and height of both the image and pixmap. */ | |
1971 | ||
1972 | static void | |
1973 | x_put_x_image (f, ximg, pixmap, width, height) | |
1974 | struct frame *f; | |
1975 | XImagePtr ximg; | |
1976 | Pixmap pixmap; | |
1977 | int width, height; | |
1978 | { | |
1979 | #ifdef HAVE_X_WINDOWS | |
1980 | GC gc; | |
1981 | ||
1982 | xassert (interrupt_input_blocked); | |
1983 | gc = XCreateGC (FRAME_X_DISPLAY (f), pixmap, 0, NULL); | |
1984 | XPutImage (FRAME_X_DISPLAY (f), pixmap, gc, ximg, 0, 0, 0, 0, width, height); | |
1985 | XFreeGC (FRAME_X_DISPLAY (f), gc); | |
1986 | #endif /* HAVE_X_WINDOWS */ | |
1987 | ||
1988 | #ifdef HAVE_NTGUI | |
1989 | #if 0 /* I don't think this is necessary looking at where it is used. */ | |
1990 | HDC hdc = get_frame_dc (f); | |
1991 | SetDIBits (hdc, pixmap, 0, height, ximg->data, &(ximg->info), DIB_RGB_COLORS); | |
1992 | release_frame_dc (f, hdc); | |
1993 | #endif | |
1994 | #endif /* HAVE_NTGUI */ | |
1995 | ||
1996 | #ifdef MAC_OS | |
1997 | xassert (ximg == pixmap); | |
1998 | #endif /* MAC_OS */ | |
1999 | } | |
2000 | ||
2001 | \f | |
2002 | /*********************************************************************** | |
2003 | File Handling | |
2004 | ***********************************************************************/ | |
2005 | ||
4ef0d4d0 KS |
2006 | static unsigned char *slurp_file P_ ((char *, int *)); |
2007 | ||
2008 | ||
2009 | /* Find image file FILE. Look in data-directory, then | |
2010 | x-bitmap-file-path. Value is the full name of the file found, or | |
2011 | nil if not found. */ | |
2012 | ||
c640aa9b | 2013 | Lisp_Object |
4ef0d4d0 KS |
2014 | x_find_image_file (file) |
2015 | Lisp_Object file; | |
2016 | { | |
2017 | Lisp_Object file_found, search_path; | |
2018 | struct gcpro gcpro1, gcpro2; | |
2019 | int fd; | |
2020 | ||
2021 | file_found = Qnil; | |
2022 | search_path = Fcons (Vdata_directory, Vx_bitmap_file_path); | |
2023 | GCPRO2 (file_found, search_path); | |
2024 | ||
2025 | /* Try to find FILE in data-directory, then x-bitmap-file-path. */ | |
2026 | fd = openp (search_path, file, Qnil, &file_found, Qnil); | |
2027 | ||
2028 | if (fd == -1) | |
2029 | file_found = Qnil; | |
2030 | else | |
2031 | close (fd); | |
2032 | ||
2033 | UNGCPRO; | |
2034 | return file_found; | |
2035 | } | |
2036 | ||
2037 | ||
2038 | /* Read FILE into memory. Value is a pointer to a buffer allocated | |
2039 | with xmalloc holding FILE's contents. Value is null if an error | |
2040 | occurred. *SIZE is set to the size of the file. */ | |
2041 | ||
2042 | static unsigned char * | |
2043 | slurp_file (file, size) | |
2044 | char *file; | |
2045 | int *size; | |
2046 | { | |
2047 | FILE *fp = NULL; | |
2048 | unsigned char *buf = NULL; | |
2049 | struct stat st; | |
2050 | ||
2051 | if (stat (file, &st) == 0 | |
2052 | && (fp = fopen (file, "rb")) != NULL | |
2053 | && (buf = (char *) xmalloc (st.st_size), | |
2054 | fread (buf, 1, st.st_size, fp) == st.st_size)) | |
2055 | { | |
2056 | *size = st.st_size; | |
2057 | fclose (fp); | |
2058 | } | |
2059 | else | |
2060 | { | |
2061 | if (fp) | |
2062 | fclose (fp); | |
2063 | if (buf) | |
2064 | { | |
2065 | xfree (buf); | |
2066 | buf = NULL; | |
2067 | } | |
2068 | } | |
2069 | ||
2070 | return buf; | |
2071 | } | |
2072 | ||
2073 | ||
2074 | \f | |
2075 | #ifdef MAC_OS | |
2076 | ||
2077 | /*********************************************************************** | |
2078 | MAC Image Load Functions | |
2079 | ***********************************************************************/ | |
2080 | ||
2081 | static int image_load_quicktime P_ ((struct frame *, struct image *img, | |
2082 | OSType)); | |
2083 | #ifdef MAC_OSX | |
2084 | static int image_load_quartz2d P_ ((struct frame *, struct image *img, int)); | |
2085 | #endif | |
2086 | ||
2087 | static OSErr | |
2088 | find_image_fsspec (specified_file, file, fss) | |
2089 | Lisp_Object specified_file, *file; | |
2090 | FSSpec *fss; | |
2091 | { | |
2092 | #if TARGET_API_MAC_CARBON | |
2093 | FSRef fsr; | |
2094 | #else | |
2095 | Str255 mac_pathname; | |
2096 | #endif | |
2097 | OSErr err; | |
2098 | ||
2099 | *file = x_find_image_file (specified_file); | |
2100 | if (!STRINGP (*file)) | |
2101 | return fnfErr; /* file or directory not found; | |
2102 | incomplete pathname */ | |
2103 | /* Try to open the image file. */ | |
2104 | #if TARGET_API_MAC_CARBON | |
2105 | err = FSPathMakeRef (SDATA (*file), &fsr, NULL); | |
2106 | if (err == noErr) | |
2107 | err = FSGetCatalogInfo (&fsr, kFSCatInfoNone, NULL, NULL, fss, NULL); | |
2108 | #else | |
2109 | if (posix_to_mac_pathname (SDATA (*file), mac_pathname, MAXPATHLEN+1) == 0) | |
2110 | return fnfErr; | |
2111 | c2pstr (mac_pathname); | |
2112 | err = FSMakeFSSpec (0, 0, mac_pathname, fss); | |
2113 | #endif | |
2114 | return err; | |
2115 | } | |
2116 | ||
2117 | static int | |
2118 | image_load_qt_1 (f, img, type, fss, dh) | |
2119 | struct frame *f; | |
2120 | struct image *img; | |
2121 | OSType type; | |
2122 | FSSpec *fss; | |
2123 | Handle dh; | |
2124 | { | |
2125 | OSErr err; | |
2126 | GraphicsImportComponent gi; | |
2127 | Rect rect; | |
2128 | int width, height; | |
2129 | short draw_all_pixels; | |
2130 | Lisp_Object specified_bg; | |
2131 | XColor color; | |
2132 | XImagePtr ximg; | |
2133 | RGBColor bg_color; | |
2134 | ||
2135 | err = OpenADefaultComponent (GraphicsImporterComponentType, | |
2136 | type, &gi); | |
2137 | if (err != noErr) | |
2138 | { | |
2139 | image_error ("Cannot get importer component for `%s'", img->spec, Qnil); | |
2140 | return 0; | |
2141 | } | |
2142 | if (dh == NULL) | |
2143 | { | |
2144 | /* read from file system spec */ | |
2145 | err = GraphicsImportSetDataFile (gi, fss); | |
2146 | if (err != noErr) | |
2147 | { | |
2148 | image_error ("Cannot set fsspec to graphics importer for '%s'", | |
2149 | img->spec, Qnil); | |
2150 | goto error; | |
2151 | } | |
2152 | } | |
2153 | else | |
2154 | { | |
2155 | /* read from data handle */ | |
2156 | err = GraphicsImportSetDataHandle (gi, dh); | |
2157 | if (err != noErr) | |
2158 | { | |
2159 | image_error ("Cannot set data handle to graphics importer for `%s'", | |
2160 | img->spec, Qnil); | |
2161 | goto error; | |
2162 | } | |
2163 | } | |
2164 | err = GraphicsImportGetNaturalBounds (gi, &rect); | |
2165 | if (err != noErr) | |
2166 | { | |
2167 | image_error ("Error reading `%s'", img->spec, Qnil); | |
2168 | goto error; | |
2169 | } | |
2170 | width = img->width = rect.right - rect.left; | |
2171 | height = img->height = rect.bottom - rect.top; | |
2172 | err = GraphicsImportDoesDrawAllPixels (gi, &draw_all_pixels); | |
2173 | #if 0 | |
2174 | /* Don't check the error code here. It may have an undocumented | |
2175 | value -32766. */ | |
2176 | if (err != noErr) | |
2177 | { | |
2178 | image_error ("Error reading `%s'", img->spec, Qnil); | |
2179 | goto error; | |
2180 | } | |
2181 | #endif | |
2182 | if (draw_all_pixels != graphicsImporterDrawsAllPixels) | |
2183 | { | |
2184 | specified_bg = image_spec_value (img->spec, QCbackground, NULL); | |
2185 | if (!STRINGP (specified_bg) || | |
2186 | !mac_defined_color (f, SDATA (specified_bg), &color, 0)) | |
2187 | { | |
2188 | color.pixel = FRAME_BACKGROUND_PIXEL (f); | |
2189 | color.red = RED16_FROM_ULONG (color.pixel); | |
2190 | color.green = GREEN16_FROM_ULONG (color.pixel); | |
2191 | color.blue = BLUE16_FROM_ULONG (color.pixel); | |
2192 | } | |
2193 | } | |
2194 | ||
2195 | if (!x_create_x_image_and_pixmap (f, width, height, 0, &ximg, &img->pixmap)) | |
2196 | goto error; | |
2197 | if (draw_all_pixels != graphicsImporterDrawsAllPixels) | |
2198 | { | |
2199 | SetGWorld (ximg, NULL); | |
2200 | bg_color.red = color.red; | |
2201 | bg_color.green = color.green; | |
2202 | bg_color.blue = color.blue; | |
2203 | RGBBackColor (&bg_color); | |
2204 | #if TARGET_API_MAC_CARBON | |
2205 | GetPortBounds (ximg, &rect); | |
2206 | EraseRect (&rect); | |
2207 | #else | |
2208 | EraseRect (&(ximg->portRect)); | |
2209 | #endif | |
2210 | } | |
2211 | GraphicsImportSetGWorld (gi, ximg, NULL); | |
2212 | GraphicsImportDraw (gi); | |
2213 | CloseComponent (gi); | |
2214 | ||
2215 | /* Maybe fill in the background field while we have ximg handy. */ | |
2216 | if (NILP (image_spec_value (img->spec, QCbackground, NULL))) | |
2217 | IMAGE_BACKGROUND (img, f, ximg); | |
2218 | ||
2219 | /* Put the image into the pixmap. */ | |
2220 | x_put_x_image (f, ximg, img->pixmap, width, height); | |
2221 | x_destroy_x_image (ximg); | |
2222 | return 1; | |
2223 | ||
2224 | error: | |
2225 | CloseComponent (gi); | |
2226 | return 0; | |
2227 | } | |
2228 | ||
2229 | ||
2230 | /* Load an image using the QuickTime Graphics Importer. | |
2231 | Note: The alpha channel does not work for PNG images. */ | |
2232 | static int | |
2233 | image_load_quicktime (f, img, type) | |
2234 | struct frame *f; | |
2235 | struct image *img; | |
2236 | OSType type; | |
2237 | { | |
2238 | Lisp_Object specified_file; | |
2239 | Lisp_Object specified_data; | |
2240 | OSErr err; | |
2241 | ||
2242 | specified_file = image_spec_value (img->spec, QCfile, NULL); | |
2243 | specified_data = image_spec_value (img->spec, QCdata, NULL); | |
2244 | ||
2245 | if (NILP (specified_data)) | |
2246 | { | |
2247 | /* Read from a file */ | |
2248 | Lisp_Object file; | |
2249 | FSSpec fss; | |
2250 | ||
2251 | err = find_image_fsspec (specified_file, &file, &fss); | |
2252 | if (err != noErr) | |
2253 | { | |
2254 | if (err == fnfErr) | |
2255 | image_error ("Cannot find image file `%s'", specified_file, Qnil); | |
2256 | else | |
2257 | image_error ("Cannot open `%s'", file, Qnil); | |
2258 | return 0; | |
2259 | } | |
2260 | return image_load_qt_1 (f, img, type, &fss, NULL); | |
2261 | } | |
2262 | else | |
2263 | { | |
2264 | /* Memory source! */ | |
2265 | int success_p; | |
2266 | Handle dh; | |
2267 | ||
2268 | err = PtrToHand (SDATA (specified_data), &dh, SBYTES (specified_data)); | |
2269 | if (err != noErr) | |
2270 | { | |
2271 | image_error ("Cannot allocate data handle for `%s'", | |
2272 | img->spec, Qnil); | |
2273 | return 0; | |
2274 | } | |
2275 | success_p = image_load_qt_1 (f, img, type, NULL, dh); | |
2276 | DisposeHandle (dh); | |
2277 | return success_p; | |
2278 | } | |
2279 | } | |
2280 | ||
2281 | ||
2282 | #ifdef MAC_OSX | |
2283 | /* Load a PNG/JPEG image using Quartz 2D decoding routines. | |
2284 | CGImageCreateWithPNGDataProvider is provided after Mac OS X 10.2. | |
2285 | So don't use this function directly but determine at runtime | |
2286 | whether it exists. */ | |
2287 | typedef CGImageRef (*CGImageCreateWithPNGDataProviderProcType) | |
2288 | (CGDataProviderRef, const float [], bool, CGColorRenderingIntent); | |
2289 | static CGImageCreateWithPNGDataProviderProcType MyCGImageCreateWithPNGDataProvider; | |
2290 | ||
2291 | ||
2292 | static void | |
2293 | init_image_func_pointer () | |
2294 | { | |
2295 | if (NSIsSymbolNameDefined ("_CGImageCreateWithPNGDataProvider")) | |
2296 | { | |
2297 | MyCGImageCreateWithPNGDataProvider | |
2298 | = (CGImageCreateWithPNGDataProviderProcType) | |
2299 | NSAddressOfSymbol (NSLookupAndBindSymbol | |
2300 | ("_CGImageCreateWithPNGDataProvider")); | |
2301 | } | |
2302 | else | |
2303 | MyCGImageCreateWithPNGDataProvider = NULL; | |
2304 | } | |
2305 | ||
2306 | ||
2307 | static int | |
2308 | image_load_quartz2d (f, img, png_p) | |
2309 | struct frame *f; | |
2310 | struct image *img; | |
2311 | int png_p; | |
2312 | { | |
2313 | Lisp_Object file, specified_file; | |
2314 | Lisp_Object specified_data, specified_bg; | |
2315 | struct gcpro gcpro1; | |
2316 | CGDataProviderRef source; | |
2317 | CGImageRef image; | |
2318 | int width, height; | |
2319 | XColor color; | |
2320 | XImagePtr ximg = NULL; | |
2321 | CGContextRef context; | |
2322 | CGRect rectangle; | |
2323 | ||
2324 | /* Open the file. */ | |
2325 | specified_file = image_spec_value (img->spec, QCfile, NULL); | |
2326 | specified_data = image_spec_value (img->spec, QCdata, NULL); | |
2327 | ||
2328 | file = Qnil; | |
2329 | GCPRO1 (file); | |
2330 | ||
2331 | if (NILP (specified_data)) | |
2332 | { | |
2333 | CFStringRef path; | |
2334 | CFURLRef url; | |
2335 | ||
2336 | file = x_find_image_file (specified_file); | |
2337 | if (!STRINGP (file)) | |
2338 | { | |
2339 | image_error ("Cannot find image file `%s'", specified_file, Qnil); | |
2340 | UNGCPRO; | |
2341 | return 0; | |
2342 | } | |
2343 | path = CFStringCreateWithCString (NULL, SDATA (file), | |
2344 | kCFStringEncodingUTF8); | |
2345 | url = CFURLCreateWithFileSystemPath (NULL, path, | |
2346 | kCFURLPOSIXPathStyle, 0); | |
2347 | CFRelease (path); | |
2348 | source = CGDataProviderCreateWithURL (url); | |
2349 | CFRelease (url); | |
2350 | } | |
2351 | else | |
2352 | source = CGDataProviderCreateWithData (NULL, SDATA (specified_data), | |
2353 | SBYTES (specified_data), NULL); | |
2354 | ||
2355 | if (png_p) | |
2356 | image = (*MyCGImageCreateWithPNGDataProvider) (source, NULL, FALSE, | |
2357 | kCGRenderingIntentDefault); | |
2358 | else | |
2359 | image = CGImageCreateWithJPEGDataProvider (source, NULL, FALSE, | |
2360 | kCGRenderingIntentDefault); | |
2361 | ||
2362 | CGDataProviderRelease (source); | |
2363 | if (image == NULL) | |
2364 | { | |
2365 | UNGCPRO; | |
2366 | image_error ("Error reading image `%s'", img->spec, Qnil); | |
2367 | return 0; | |
2368 | } | |
2369 | ||
2370 | if (png_p) | |
2371 | { | |
2372 | specified_bg = image_spec_value (img->spec, QCbackground, NULL); | |
2373 | if (!STRINGP (specified_bg) || | |
2374 | !mac_defined_color (f, SDATA (specified_bg), &color, 0)) | |
2375 | { | |
2376 | color.pixel = FRAME_BACKGROUND_PIXEL (f); | |
2377 | color.red = RED16_FROM_ULONG (color.pixel); | |
2378 | color.green = GREEN16_FROM_ULONG (color.pixel); | |
2379 | color.blue = BLUE16_FROM_ULONG (color.pixel); | |
2380 | } | |
2381 | } | |
2382 | width = img->width = CGImageGetWidth (image); | |
2383 | height = img->height = CGImageGetHeight (image); | |
2384 | if (!x_create_x_image_and_pixmap (f, width, height, 0, &ximg, &img->pixmap)) | |
2385 | { | |
2386 | CGImageRelease (image); | |
2387 | UNGCPRO; | |
2388 | return 0; | |
2389 | } | |
2390 | rectangle = CGRectMake (0, 0, width, height); | |
2391 | QDBeginCGContext (ximg, &context); | |
2392 | if (png_p) | |
2393 | { | |
2394 | CGContextSetRGBFillColor (context, color.red / 65535.0, | |
2395 | color.green / 65535.0, | |
2396 | color.blue / 65535.0, 1.0); | |
2397 | CGContextFillRect (context, rectangle); | |
2398 | } | |
2399 | CGContextDrawImage (context, rectangle, image); | |
2400 | QDEndCGContext (ximg, &context); | |
2401 | CGImageRelease (image); | |
2402 | ||
2403 | /* Maybe fill in the background field while we have ximg handy. */ | |
2404 | if (NILP (image_spec_value (img->spec, QCbackground, NULL))) | |
2405 | IMAGE_BACKGROUND (img, f, ximg); | |
2406 | ||
2407 | /* Put the image into the pixmap. */ | |
2408 | x_put_x_image (f, ximg, img->pixmap, width, height); | |
2409 | x_destroy_x_image (ximg); | |
2410 | UNGCPRO; | |
2411 | return 1; | |
2412 | } | |
2413 | #endif | |
2414 | ||
2415 | #endif /* MAC_OS */ | |
2416 | ||
2417 | \f | |
2418 | /*********************************************************************** | |
2419 | XBM images | |
2420 | ***********************************************************************/ | |
2421 | ||
2422 | static int xbm_scan P_ ((unsigned char **, unsigned char *, char *, int *)); | |
2423 | static int xbm_load P_ ((struct frame *f, struct image *img)); | |
2424 | static int xbm_load_image P_ ((struct frame *f, struct image *img, | |
2425 | unsigned char *, unsigned char *)); | |
2426 | static int xbm_image_p P_ ((Lisp_Object object)); | |
2427 | static int xbm_read_bitmap_data P_ ((unsigned char *, unsigned char *, | |
2428 | int *, int *, unsigned char **)); | |
2429 | static int xbm_file_p P_ ((Lisp_Object)); | |
2430 | ||
2431 | ||
2432 | /* Indices of image specification fields in xbm_format, below. */ | |
2433 | ||
2434 | enum xbm_keyword_index | |
2435 | { | |
2436 | XBM_TYPE, | |
2437 | XBM_FILE, | |
2438 | XBM_WIDTH, | |
2439 | XBM_HEIGHT, | |
2440 | XBM_DATA, | |
2441 | XBM_FOREGROUND, | |
2442 | XBM_BACKGROUND, | |
2443 | XBM_ASCENT, | |
2444 | XBM_MARGIN, | |
2445 | XBM_RELIEF, | |
2446 | XBM_ALGORITHM, | |
2447 | XBM_HEURISTIC_MASK, | |
2448 | XBM_MASK, | |
2449 | XBM_LAST | |
2450 | }; | |
2451 | ||
2452 | /* Vector of image_keyword structures describing the format | |
2453 | of valid XBM image specifications. */ | |
2454 | ||
2455 | static struct image_keyword xbm_format[XBM_LAST] = | |
2456 | { | |
2457 | {":type", IMAGE_SYMBOL_VALUE, 1}, | |
2458 | {":file", IMAGE_STRING_VALUE, 0}, | |
2459 | {":width", IMAGE_POSITIVE_INTEGER_VALUE, 0}, | |
2460 | {":height", IMAGE_POSITIVE_INTEGER_VALUE, 0}, | |
2461 | {":data", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, | |
2462 | {":foreground", IMAGE_STRING_OR_NIL_VALUE, 0}, | |
2463 | {":background", IMAGE_STRING_OR_NIL_VALUE, 0}, | |
2464 | {":ascent", IMAGE_ASCENT_VALUE, 0}, | |
2465 | {":margin", IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR, 0}, | |
2466 | {":relief", IMAGE_INTEGER_VALUE, 0}, | |
2467 | {":conversion", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, | |
2468 | {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, | |
2469 | {":mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0} | |
2470 | }; | |
2471 | ||
2472 | /* Structure describing the image type XBM. */ | |
2473 | ||
2474 | static struct image_type xbm_type = | |
2475 | { | |
2476 | &Qxbm, | |
2477 | xbm_image_p, | |
2478 | xbm_load, | |
2479 | x_clear_image, | |
2480 | NULL | |
2481 | }; | |
2482 | ||
2483 | /* Tokens returned from xbm_scan. */ | |
2484 | ||
2485 | enum xbm_token | |
2486 | { | |
2487 | XBM_TK_IDENT = 256, | |
2488 | XBM_TK_NUMBER | |
2489 | }; | |
2490 | ||
2491 | ||
2492 | /* Return non-zero if OBJECT is a valid XBM-type image specification. | |
2493 | A valid specification is a list starting with the symbol `image' | |
2494 | The rest of the list is a property list which must contain an | |
2495 | entry `:type xbm.. | |
2496 | ||
2497 | If the specification specifies a file to load, it must contain | |
2498 | an entry `:file FILENAME' where FILENAME is a string. | |
2499 | ||
2500 | If the specification is for a bitmap loaded from memory it must | |
2501 | contain `:width WIDTH', `:height HEIGHT', and `:data DATA', where | |
2502 | WIDTH and HEIGHT are integers > 0. DATA may be: | |
2503 | ||
2504 | 1. a string large enough to hold the bitmap data, i.e. it must | |
2505 | have a size >= (WIDTH + 7) / 8 * HEIGHT | |
2506 | ||
2507 | 2. a bool-vector of size >= WIDTH * HEIGHT | |
2508 | ||
2509 | 3. a vector of strings or bool-vectors, one for each line of the | |
2510 | bitmap. | |
2511 | ||
2512 | 4. A string containing an in-memory XBM file. WIDTH and HEIGHT | |
2513 | may not be specified in this case because they are defined in the | |
2514 | XBM file. | |
2515 | ||
2516 | Both the file and data forms may contain the additional entries | |
2517 | `:background COLOR' and `:foreground COLOR'. If not present, | |
2518 | foreground and background of the frame on which the image is | |
2519 | displayed is used. */ | |
2520 | ||
2521 | static int | |
2522 | xbm_image_p (object) | |
2523 | Lisp_Object object; | |
2524 | { | |
2525 | struct image_keyword kw[XBM_LAST]; | |
2526 | ||
2527 | bcopy (xbm_format, kw, sizeof kw); | |
2528 | if (!parse_image_spec (object, kw, XBM_LAST, Qxbm)) | |
2529 | return 0; | |
2530 | ||
2531 | xassert (EQ (kw[XBM_TYPE].value, Qxbm)); | |
2532 | ||
2533 | if (kw[XBM_FILE].count) | |
2534 | { | |
2535 | if (kw[XBM_WIDTH].count || kw[XBM_HEIGHT].count || kw[XBM_DATA].count) | |
2536 | return 0; | |
2537 | } | |
2538 | else if (kw[XBM_DATA].count && xbm_file_p (kw[XBM_DATA].value)) | |
2539 | { | |
2540 | /* In-memory XBM file. */ | |
2541 | if (kw[XBM_WIDTH].count || kw[XBM_HEIGHT].count || kw[XBM_FILE].count) | |
2542 | return 0; | |
2543 | } | |
2544 | else | |
2545 | { | |
2546 | Lisp_Object data; | |
2547 | int width, height; | |
2548 | ||
2549 | /* Entries for `:width', `:height' and `:data' must be present. */ | |
2550 | if (!kw[XBM_WIDTH].count | |
2551 | || !kw[XBM_HEIGHT].count | |
2552 | || !kw[XBM_DATA].count) | |
2553 | return 0; | |
2554 | ||
2555 | data = kw[XBM_DATA].value; | |
2556 | width = XFASTINT (kw[XBM_WIDTH].value); | |
2557 | height = XFASTINT (kw[XBM_HEIGHT].value); | |
2558 | ||
2559 | /* Check type of data, and width and height against contents of | |
2560 | data. */ | |
2561 | if (VECTORP (data)) | |
2562 | { | |
2563 | int i; | |
2564 | ||
2565 | /* Number of elements of the vector must be >= height. */ | |
2566 | if (XVECTOR (data)->size < height) | |
2567 | return 0; | |
2568 | ||
2569 | /* Each string or bool-vector in data must be large enough | |
2570 | for one line of the image. */ | |
2571 | for (i = 0; i < height; ++i) | |
2572 | { | |
2573 | Lisp_Object elt = XVECTOR (data)->contents[i]; | |
2574 | ||
2575 | if (STRINGP (elt)) | |
2576 | { | |
2577 | if (SCHARS (elt) | |
2578 | < (width + BITS_PER_CHAR - 1) / BITS_PER_CHAR) | |
2579 | return 0; | |
2580 | } | |
2581 | else if (BOOL_VECTOR_P (elt)) | |
2582 | { | |
2583 | if (XBOOL_VECTOR (elt)->size < width) | |
2584 | return 0; | |
2585 | } | |
2586 | else | |
2587 | return 0; | |
2588 | } | |
2589 | } | |
2590 | else if (STRINGP (data)) | |
2591 | { | |
2592 | if (SCHARS (data) | |
2593 | < (width + BITS_PER_CHAR - 1) / BITS_PER_CHAR * height) | |
2594 | return 0; | |
2595 | } | |
2596 | else if (BOOL_VECTOR_P (data)) | |
2597 | { | |
2598 | if (XBOOL_VECTOR (data)->size < width * height) | |
2599 | return 0; | |
2600 | } | |
2601 | else | |
2602 | return 0; | |
2603 | } | |
2604 | ||
2605 | return 1; | |
2606 | } | |
2607 | ||
2608 | ||
2609 | /* Scan a bitmap file. FP is the stream to read from. Value is | |
2610 | either an enumerator from enum xbm_token, or a character for a | |
2611 | single-character token, or 0 at end of file. If scanning an | |
2612 | identifier, store the lexeme of the identifier in SVAL. If | |
2613 | scanning a number, store its value in *IVAL. */ | |
2614 | ||
2615 | static int | |
2616 | xbm_scan (s, end, sval, ival) | |
2617 | unsigned char **s, *end; | |
2618 | char *sval; | |
2619 | int *ival; | |
2620 | { | |
2621 | unsigned int c; | |
2622 | ||
2623 | loop: | |
2624 | ||
2625 | /* Skip white space. */ | |
2626 | while (*s < end && (c = *(*s)++, isspace (c))) | |
2627 | ; | |
2628 | ||
2629 | if (*s >= end) | |
2630 | c = 0; | |
2631 | else if (isdigit (c)) | |
2632 | { | |
2633 | int value = 0, digit; | |
2634 | ||
2635 | if (c == '0' && *s < end) | |
2636 | { | |
2637 | c = *(*s)++; | |
2638 | if (c == 'x' || c == 'X') | |
2639 | { | |
2640 | while (*s < end) | |
2641 | { | |
2642 | c = *(*s)++; | |
2643 | if (isdigit (c)) | |
2644 | digit = c - '0'; | |
2645 | else if (c >= 'a' && c <= 'f') | |
2646 | digit = c - 'a' + 10; | |
2647 | else if (c >= 'A' && c <= 'F') | |
2648 | digit = c - 'A' + 10; | |
2649 | else | |
2650 | break; | |
2651 | value = 16 * value + digit; | |
2652 | } | |
2653 | } | |
2654 | else if (isdigit (c)) | |
2655 | { | |
2656 | value = c - '0'; | |
2657 | while (*s < end | |
2658 | && (c = *(*s)++, isdigit (c))) | |
2659 | value = 8 * value + c - '0'; | |
2660 | } | |
2661 | } | |
2662 | else | |
2663 | { | |
2664 | value = c - '0'; | |
2665 | while (*s < end | |
2666 | && (c = *(*s)++, isdigit (c))) | |
2667 | value = 10 * value + c - '0'; | |
2668 | } | |
2669 | ||
2670 | if (*s < end) | |
2671 | *s = *s - 1; | |
2672 | *ival = value; | |
2673 | c = XBM_TK_NUMBER; | |
2674 | } | |
2675 | else if (isalpha (c) || c == '_') | |
2676 | { | |
2677 | *sval++ = c; | |
2678 | while (*s < end | |
2679 | && (c = *(*s)++, (isalnum (c) || c == '_'))) | |
2680 | *sval++ = c; | |
2681 | *sval = 0; | |
2682 | if (*s < end) | |
2683 | *s = *s - 1; | |
2684 | c = XBM_TK_IDENT; | |
2685 | } | |
2686 | else if (c == '/' && **s == '*') | |
2687 | { | |
2688 | /* C-style comment. */ | |
2689 | ++*s; | |
2690 | while (**s && (**s != '*' || *(*s + 1) != '/')) | |
2691 | ++*s; | |
2692 | if (**s) | |
2693 | { | |
2694 | *s += 2; | |
2695 | goto loop; | |
2696 | } | |
2697 | } | |
2698 | ||
2699 | return c; | |
2700 | } | |
2701 | ||
2702 | #ifdef HAVE_NTGUI | |
2703 | ||
2704 | /* Create a Windows bitmap from X bitmap data. */ | |
2705 | static HBITMAP | |
2706 | w32_create_pixmap_from_bitmap_data (int width, int height, char *data) | |
2707 | { | |
2708 | static unsigned char swap_nibble[16] | |
2709 | = { 0x0, 0x8, 0x4, 0xc, /* 0000 1000 0100 1100 */ | |
2710 | 0x2, 0xa, 0x6, 0xe, /* 0010 1010 0110 1110 */ | |
2711 | 0x1, 0x9, 0x5, 0xd, /* 0001 1001 0101 1101 */ | |
2712 | 0x3, 0xb, 0x7, 0xf }; /* 0011 1011 0111 1111 */ | |
2713 | int i, j, w1, w2; | |
2714 | unsigned char *bits, *p; | |
2715 | HBITMAP bmp; | |
2716 | ||
2717 | w1 = (width + 7) / 8; /* nb of 8bits elt in X bitmap */ | |
2718 | w2 = ((width + 15) / 16) * 2; /* nb of 16bits elt in W32 bitmap */ | |
2719 | bits = (unsigned char *) alloca (height * w2); | |
2720 | bzero (bits, height * w2); | |
2721 | for (i = 0; i < height; i++) | |
2722 | { | |
2723 | p = bits + i*w2; | |
2724 | for (j = 0; j < w1; j++) | |
2725 | { | |
2726 | /* Bitswap XBM bytes to match how Windows does things. */ | |
2727 | unsigned char c = *data++; | |
2728 | *p++ = (unsigned char)((swap_nibble[c & 0xf] << 4) | |
2729 | | (swap_nibble[(c>>4) & 0xf])); | |
2730 | } | |
2731 | } | |
2732 | bmp = CreateBitmap (width, height, 1, 1, (char *) bits); | |
2733 | ||
2734 | return bmp; | |
2735 | } | |
2736 | ||
2737 | static void convert_mono_to_color_image (f, img, foreground, background) | |
2738 | struct frame *f; | |
2739 | struct image *img; | |
2740 | COLORREF foreground, background; | |
2741 | { | |
2742 | HDC hdc, old_img_dc, new_img_dc; | |
2743 | HGDIOBJ old_prev, new_prev; | |
2744 | HBITMAP new_pixmap; | |
2745 | ||
2746 | hdc = get_frame_dc (f); | |
2747 | old_img_dc = CreateCompatibleDC (hdc); | |
2748 | new_img_dc = CreateCompatibleDC (hdc); | |
2749 | new_pixmap = CreateCompatibleBitmap (hdc, img->width, img->height); | |
2750 | release_frame_dc (f, hdc); | |
2751 | old_prev = SelectObject (old_img_dc, img->pixmap); | |
2752 | new_prev = SelectObject (new_img_dc, new_pixmap); | |
2753 | SetTextColor (new_img_dc, foreground); | |
2754 | SetBkColor (new_img_dc, background); | |
2755 | ||
2756 | BitBlt (new_img_dc, 0, 0, img->width, img->height, old_img_dc, | |
2757 | 0, 0, SRCCOPY); | |
2758 | ||
2759 | SelectObject (old_img_dc, old_prev); | |
2760 | SelectObject (new_img_dc, new_prev); | |
2761 | DeleteDC (old_img_dc); | |
2762 | DeleteDC (new_img_dc); | |
2763 | DeleteObject (img->pixmap); | |
2764 | if (new_pixmap == 0) | |
2765 | fprintf (stderr, "Failed to convert image to color.\n"); | |
2766 | else | |
2767 | img->pixmap = new_pixmap; | |
2768 | } | |
2769 | ||
2770 | #define XBM_BIT_SHUFFLE(b) (~(b)) | |
2771 | ||
2772 | #else | |
2773 | ||
2774 | #define XBM_BIT_SHUFFLE(b) (b) | |
2775 | ||
2776 | #endif /* HAVE_NTGUI */ | |
2777 | ||
2778 | ||
2779 | static void | |
2780 | Create_Pixmap_From_Bitmap_Data(f, img, data, fg, bg, non_default_colors) | |
2781 | struct frame *f; | |
2782 | struct image *img; | |
2783 | char *data; | |
2784 | RGB_PIXEL_COLOR fg, bg; | |
2785 | int non_default_colors; | |
2786 | { | |
2787 | #ifdef HAVE_NTGUI | |
2788 | img->pixmap | |
2789 | = w32_create_pixmap_from_bitmap_data (img->width, img->height, data); | |
2790 | ||
2791 | /* If colors were specified, transfer the bitmap to a color one. */ | |
2792 | if (non_default_colors) | |
2793 | convert_mono_to_color_image (f, img, fg, bg); | |
2794 | #else | |
2795 | img->pixmap | |
2796 | = XCreatePixmapFromBitmapData (FRAME_X_DISPLAY (f), | |
2797 | FRAME_X_WINDOW (f), | |
2798 | data, | |
2799 | img->width, img->height, | |
2800 | fg, bg, | |
2801 | DefaultDepthOfScreen (FRAME_X_SCREEN (f))); | |
2802 | #endif /* HAVE_NTGUI */ | |
2803 | } | |
2804 | ||
2805 | ||
2806 | ||
2807 | /* Replacement for XReadBitmapFileData which isn't available under old | |
2808 | X versions. CONTENTS is a pointer to a buffer to parse; END is the | |
2809 | buffer's end. Set *WIDTH and *HEIGHT to the width and height of | |
2810 | the image. Return in *DATA the bitmap data allocated with xmalloc. | |
2811 | Value is non-zero if successful. DATA null means just test if | |
2812 | CONTENTS looks like an in-memory XBM file. */ | |
2813 | ||
2814 | static int | |
2815 | xbm_read_bitmap_data (contents, end, width, height, data) | |
2816 | unsigned char *contents, *end; | |
2817 | int *width, *height; | |
2818 | unsigned char **data; | |
2819 | { | |
2820 | unsigned char *s = contents; | |
2821 | char buffer[BUFSIZ]; | |
2822 | int padding_p = 0; | |
2823 | int v10 = 0; | |
2824 | int bytes_per_line, i, nbytes; | |
2825 | unsigned char *p; | |
2826 | int value; | |
2827 | int LA1; | |
2828 | ||
2829 | #define match() \ | |
2830 | LA1 = xbm_scan (&s, end, buffer, &value) | |
2831 | ||
2832 | #define expect(TOKEN) \ | |
2833 | if (LA1 != (TOKEN)) \ | |
2834 | goto failure; \ | |
2835 | else \ | |
2836 | match () | |
2837 | ||
2838 | #define expect_ident(IDENT) \ | |
2839 | if (LA1 == XBM_TK_IDENT && strcmp (buffer, (IDENT)) == 0) \ | |
2840 | match (); \ | |
2841 | else \ | |
2842 | goto failure | |
2843 | ||
2844 | *width = *height = -1; | |
2845 | if (data) | |
2846 | *data = NULL; | |
2847 | LA1 = xbm_scan (&s, end, buffer, &value); | |
2848 | ||
2849 | /* Parse defines for width, height and hot-spots. */ | |
2850 | while (LA1 == '#') | |
2851 | { | |
2852 | match (); | |
2853 | expect_ident ("define"); | |
2854 | expect (XBM_TK_IDENT); | |
2855 | ||
2856 | if (LA1 == XBM_TK_NUMBER); | |
2857 | { | |
2858 | char *p = strrchr (buffer, '_'); | |
2859 | p = p ? p + 1 : buffer; | |
2860 | if (strcmp (p, "width") == 0) | |
2861 | *width = value; | |
2862 | else if (strcmp (p, "height") == 0) | |
2863 | *height = value; | |
2864 | } | |
2865 | expect (XBM_TK_NUMBER); | |
2866 | } | |
2867 | ||
2868 | if (*width < 0 || *height < 0) | |
2869 | goto failure; | |
2870 | else if (data == NULL) | |
2871 | goto success; | |
2872 | ||
2873 | /* Parse bits. Must start with `static'. */ | |
2874 | expect_ident ("static"); | |
2875 | if (LA1 == XBM_TK_IDENT) | |
2876 | { | |
2877 | if (strcmp (buffer, "unsigned") == 0) | |
2878 | { | |
2879 | match (); | |
2880 | expect_ident ("char"); | |
2881 | } | |
2882 | else if (strcmp (buffer, "short") == 0) | |
2883 | { | |
2884 | match (); | |
2885 | v10 = 1; | |
2886 | if (*width % 16 && *width % 16 < 9) | |
2887 | padding_p = 1; | |
2888 | } | |
2889 | else if (strcmp (buffer, "char") == 0) | |
2890 | match (); | |
2891 | else | |
2892 | goto failure; | |
2893 | } | |
2894 | else | |
2895 | goto failure; | |
2896 | ||
2897 | expect (XBM_TK_IDENT); | |
2898 | expect ('['); | |
2899 | expect (']'); | |
2900 | expect ('='); | |
2901 | expect ('{'); | |
2902 | ||
2903 | bytes_per_line = (*width + 7) / 8 + padding_p; | |
2904 | nbytes = bytes_per_line * *height; | |
2905 | p = *data = (char *) xmalloc (nbytes); | |
2906 | ||
2907 | if (v10) | |
2908 | { | |
2909 | for (i = 0; i < nbytes; i += 2) | |
2910 | { | |
2911 | int val = value; | |
2912 | expect (XBM_TK_NUMBER); | |
2913 | ||
2914 | *p++ = XBM_BIT_SHUFFLE (val); | |
2915 | if (!padding_p || ((i + 2) % bytes_per_line)) | |
2916 | *p++ = XBM_BIT_SHUFFLE (value >> 8); | |
2917 | ||
2918 | if (LA1 == ',' || LA1 == '}') | |
2919 | match (); | |
2920 | else | |
2921 | goto failure; | |
2922 | } | |
2923 | } | |
2924 | else | |
2925 | { | |
2926 | for (i = 0; i < nbytes; ++i) | |
2927 | { | |
2928 | int val = value; | |
2929 | expect (XBM_TK_NUMBER); | |
2930 | ||
2931 | *p++ = XBM_BIT_SHUFFLE (val); | |
2932 | ||
2933 | if (LA1 == ',' || LA1 == '}') | |
2934 | match (); | |
2935 | else | |
2936 | goto failure; | |
2937 | } | |
2938 | } | |
2939 | ||
2940 | success: | |
2941 | return 1; | |
2942 | ||
2943 | failure: | |
2944 | ||
2945 | if (data && *data) | |
2946 | { | |
2947 | xfree (*data); | |
2948 | *data = NULL; | |
2949 | } | |
2950 | return 0; | |
2951 | ||
2952 | #undef match | |
2953 | #undef expect | |
2954 | #undef expect_ident | |
2955 | } | |
2956 | ||
2957 | ||
2958 | /* Load XBM image IMG which will be displayed on frame F from buffer | |
2959 | CONTENTS. END is the end of the buffer. Value is non-zero if | |
2960 | successful. */ | |
2961 | ||
2962 | static int | |
2963 | xbm_load_image (f, img, contents, end) | |
2964 | struct frame *f; | |
2965 | struct image *img; | |
2966 | unsigned char *contents, *end; | |
2967 | { | |
2968 | int rc; | |
2969 | unsigned char *data; | |
2970 | int success_p = 0; | |
2971 | ||
2972 | rc = xbm_read_bitmap_data (contents, end, &img->width, &img->height, &data); | |
2973 | if (rc) | |
2974 | { | |
2975 | unsigned long foreground = FRAME_FOREGROUND_PIXEL (f); | |
2976 | unsigned long background = FRAME_BACKGROUND_PIXEL (f); | |
2977 | int non_default_colors = 0; | |
2978 | Lisp_Object value; | |
2979 | ||
2980 | xassert (img->width > 0 && img->height > 0); | |
2981 | ||
2982 | /* Get foreground and background colors, maybe allocate colors. */ | |
2983 | value = image_spec_value (img->spec, QCforeground, NULL); | |
2984 | if (!NILP (value)) | |
2985 | { | |
2986 | foreground = x_alloc_image_color (f, img, value, foreground); | |
2987 | non_default_colors = 1; | |
2988 | } | |
2989 | value = image_spec_value (img->spec, QCbackground, NULL); | |
2990 | if (!NILP (value)) | |
2991 | { | |
2992 | background = x_alloc_image_color (f, img, value, background); | |
2993 | img->background = background; | |
2994 | img->background_valid = 1; | |
2995 | non_default_colors = 1; | |
2996 | } | |
2997 | ||
1f026899 | 2998 | Create_Pixmap_From_Bitmap_Data (f, img, data, |
4ef0d4d0 KS |
2999 | foreground, background, |
3000 | non_default_colors); | |
3001 | xfree (data); | |
3002 | ||
3003 | if (img->pixmap == NO_PIXMAP) | |
3004 | { | |
3005 | x_clear_image (f, img); | |
3006 | image_error ("Unable to create X pixmap for `%s'", img->spec, Qnil); | |
3007 | } | |
3008 | else | |
3009 | success_p = 1; | |
3010 | } | |
3011 | else | |
3012 | image_error ("Error loading XBM image `%s'", img->spec, Qnil); | |
3013 | ||
3014 | return success_p; | |
3015 | } | |
3016 | ||
3017 | ||
3018 | /* Value is non-zero if DATA looks like an in-memory XBM file. */ | |
3019 | ||
3020 | static int | |
3021 | xbm_file_p (data) | |
3022 | Lisp_Object data; | |
3023 | { | |
3024 | int w, h; | |
3025 | return (STRINGP (data) | |
3026 | && xbm_read_bitmap_data (SDATA (data), | |
3027 | (SDATA (data) | |
3028 | + SBYTES (data)), | |
3029 | &w, &h, NULL)); | |
3030 | } | |
3031 | ||
3032 | ||
3033 | /* Fill image IMG which is used on frame F with pixmap data. Value is | |
3034 | non-zero if successful. */ | |
3035 | ||
3036 | static int | |
3037 | xbm_load (f, img) | |
3038 | struct frame *f; | |
3039 | struct image *img; | |
3040 | { | |
3041 | int success_p = 0; | |
3042 | Lisp_Object file_name; | |
3043 | ||
3044 | xassert (xbm_image_p (img->spec)); | |
3045 | ||
3046 | /* If IMG->spec specifies a file name, create a non-file spec from it. */ | |
3047 | file_name = image_spec_value (img->spec, QCfile, NULL); | |
3048 | if (STRINGP (file_name)) | |
3049 | { | |
3050 | Lisp_Object file; | |
3051 | unsigned char *contents; | |
3052 | int size; | |
3053 | struct gcpro gcpro1; | |
3054 | ||
3055 | file = x_find_image_file (file_name); | |
3056 | GCPRO1 (file); | |
3057 | if (!STRINGP (file)) | |
3058 | { | |
3059 | image_error ("Cannot find image file `%s'", file_name, Qnil); | |
3060 | UNGCPRO; | |
3061 | return 0; | |
3062 | } | |
3063 | ||
3064 | contents = slurp_file (SDATA (file), &size); | |
3065 | if (contents == NULL) | |
3066 | { | |
3067 | image_error ("Error loading XBM image `%s'", img->spec, Qnil); | |
3068 | UNGCPRO; | |
3069 | return 0; | |
3070 | } | |
3071 | ||
3072 | success_p = xbm_load_image (f, img, contents, contents + size); | |
3073 | UNGCPRO; | |
3074 | } | |
3075 | else | |
3076 | { | |
3077 | struct image_keyword fmt[XBM_LAST]; | |
3078 | Lisp_Object data; | |
3079 | unsigned long foreground = FRAME_FOREGROUND_PIXEL (f); | |
3080 | unsigned long background = FRAME_BACKGROUND_PIXEL (f); | |
3081 | int non_default_colors = 0; | |
3082 | char *bits; | |
3083 | int parsed_p; | |
3084 | int in_memory_file_p = 0; | |
3085 | ||
3086 | /* See if data looks like an in-memory XBM file. */ | |
3087 | data = image_spec_value (img->spec, QCdata, NULL); | |
3088 | in_memory_file_p = xbm_file_p (data); | |
3089 | ||
3090 | /* Parse the image specification. */ | |
3091 | bcopy (xbm_format, fmt, sizeof fmt); | |
3092 | parsed_p = parse_image_spec (img->spec, fmt, XBM_LAST, Qxbm); | |
3093 | xassert (parsed_p); | |
3094 | ||
3095 | /* Get specified width, and height. */ | |
3096 | if (!in_memory_file_p) | |
3097 | { | |
3098 | img->width = XFASTINT (fmt[XBM_WIDTH].value); | |
3099 | img->height = XFASTINT (fmt[XBM_HEIGHT].value); | |
3100 | xassert (img->width > 0 && img->height > 0); | |
3101 | } | |
3102 | ||
3103 | /* Get foreground and background colors, maybe allocate colors. */ | |
3104 | if (fmt[XBM_FOREGROUND].count | |
3105 | && STRINGP (fmt[XBM_FOREGROUND].value)) | |
3106 | { | |
3107 | foreground = x_alloc_image_color (f, img, fmt[XBM_FOREGROUND].value, | |
3108 | foreground); | |
3109 | non_default_colors = 1; | |
3110 | } | |
3111 | ||
3112 | if (fmt[XBM_BACKGROUND].count | |
3113 | && STRINGP (fmt[XBM_BACKGROUND].value)) | |
3114 | { | |
3115 | background = x_alloc_image_color (f, img, fmt[XBM_BACKGROUND].value, | |
3116 | background); | |
3117 | non_default_colors = 1; | |
3118 | } | |
3119 | ||
3120 | if (in_memory_file_p) | |
3121 | success_p = xbm_load_image (f, img, SDATA (data), | |
3122 | (SDATA (data) | |
3123 | + SBYTES (data))); | |
3124 | else | |
3125 | { | |
3126 | if (VECTORP (data)) | |
3127 | { | |
3128 | int i; | |
3129 | char *p; | |
3130 | int nbytes = (img->width + BITS_PER_CHAR - 1) / BITS_PER_CHAR; | |
3131 | ||
3132 | p = bits = (char *) alloca (nbytes * img->height); | |
3133 | for (i = 0; i < img->height; ++i, p += nbytes) | |
3134 | { | |
3135 | Lisp_Object line = XVECTOR (data)->contents[i]; | |
3136 | if (STRINGP (line)) | |
3137 | bcopy (SDATA (line), p, nbytes); | |
3138 | else | |
3139 | bcopy (XBOOL_VECTOR (line)->data, p, nbytes); | |
3140 | } | |
3141 | } | |
3142 | else if (STRINGP (data)) | |
3143 | bits = SDATA (data); | |
3144 | else | |
3145 | bits = XBOOL_VECTOR (data)->data; | |
3146 | ||
3147 | /* Create the pixmap. */ | |
3148 | ||
3149 | Create_Pixmap_From_Bitmap_Data (f, img, bits, | |
3150 | foreground, background, | |
3151 | non_default_colors); | |
3152 | if (img->pixmap) | |
3153 | success_p = 1; | |
3154 | else | |
3155 | { | |
3156 | image_error ("Unable to create pixmap for XBM image `%s'", | |
3157 | img->spec, Qnil); | |
3158 | x_clear_image (f, img); | |
3159 | } | |
3160 | } | |
3161 | } | |
3162 | ||
3163 | return success_p; | |
3164 | } | |
3165 | ||
3166 | ||
3167 | \f | |
3168 | /*********************************************************************** | |
3169 | XPM images | |
3170 | ***********************************************************************/ | |
3171 | ||
3172 | #ifdef HAVE_XPM | |
3173 | ||
3174 | static int xpm_image_p P_ ((Lisp_Object object)); | |
3175 | static int xpm_load P_ ((struct frame *f, struct image *img)); | |
3176 | static int xpm_valid_color_symbols_p P_ ((Lisp_Object)); | |
3177 | ||
3178 | #ifdef HAVE_NTGUI | |
3179 | /* Indicate to xpm.h that we don't have Xlib. */ | |
3180 | #define FOR_MSW | |
3181 | /* simx.h in xpm defines XColor and XImage differently than Emacs. */ | |
3182 | #define XColor xpm_XColor | |
3183 | #define XImage xpm_XImage | |
3184 | #define PIXEL_ALREADY_TYPEDEFED | |
3185 | #include "X11/xpm.h" | |
3186 | #undef FOR_MSW | |
3187 | #undef XColor | |
3188 | #undef XImage | |
3189 | #undef PIXEL_ALREADY_TYPEDEFED | |
3190 | #else | |
3191 | #include "X11/xpm.h" | |
3192 | #endif /* HAVE_NTGUI */ | |
3193 | ||
3194 | /* The symbol `xpm' identifying XPM-format images. */ | |
3195 | ||
3196 | Lisp_Object Qxpm; | |
3197 | ||
3198 | /* Indices of image specification fields in xpm_format, below. */ | |
3199 | ||
3200 | enum xpm_keyword_index | |
3201 | { | |
3202 | XPM_TYPE, | |
3203 | XPM_FILE, | |
3204 | XPM_DATA, | |
3205 | XPM_ASCENT, | |
3206 | XPM_MARGIN, | |
3207 | XPM_RELIEF, | |
3208 | XPM_ALGORITHM, | |
3209 | XPM_HEURISTIC_MASK, | |
3210 | XPM_MASK, | |
3211 | XPM_COLOR_SYMBOLS, | |
3212 | XPM_BACKGROUND, | |
3213 | XPM_LAST | |
3214 | }; | |
3215 | ||
3216 | /* Vector of image_keyword structures describing the format | |
3217 | of valid XPM image specifications. */ | |
3218 | ||
3219 | static struct image_keyword xpm_format[XPM_LAST] = | |
3220 | { | |
3221 | {":type", IMAGE_SYMBOL_VALUE, 1}, | |
3222 | {":file", IMAGE_STRING_VALUE, 0}, | |
3223 | {":data", IMAGE_STRING_VALUE, 0}, | |
3224 | {":ascent", IMAGE_ASCENT_VALUE, 0}, | |
3225 | {":margin", IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR, 0}, | |
3226 | {":relief", IMAGE_INTEGER_VALUE, 0}, | |
3227 | {":conversion", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, | |
3228 | {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, | |
3229 | {":mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, | |
3230 | {":color-symbols", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, | |
3231 | {":background", IMAGE_STRING_OR_NIL_VALUE, 0} | |
3232 | }; | |
3233 | ||
3234 | /* Structure describing the image type XPM. */ | |
3235 | ||
3236 | static struct image_type xpm_type = | |
3237 | { | |
3238 | &Qxpm, | |
3239 | xpm_image_p, | |
3240 | xpm_load, | |
3241 | x_clear_image, | |
3242 | NULL | |
3243 | }; | |
3244 | ||
3245 | #ifdef HAVE_X_WINDOWS | |
3246 | ||
3247 | /* Define ALLOC_XPM_COLORS if we can use Emacs' own color allocation | |
3248 | functions for allocating image colors. Our own functions handle | |
3249 | color allocation failures more gracefully than the ones on the XPM | |
3250 | lib. */ | |
3251 | ||
3252 | #if defined XpmAllocColor && defined XpmFreeColors && defined XpmColorClosure | |
3253 | #define ALLOC_XPM_COLORS | |
3254 | #endif | |
3255 | #endif /* HAVE_X_WINDOWS */ | |
3256 | ||
3257 | #ifdef ALLOC_XPM_COLORS | |
3258 | ||
3259 | static void xpm_init_color_cache P_ ((struct frame *, XpmAttributes *)); | |
3260 | static void xpm_free_color_cache P_ ((void)); | |
3261 | static int xpm_lookup_color P_ ((struct frame *, char *, XColor *)); | |
3262 | static int xpm_color_bucket P_ ((char *)); | |
3263 | static struct xpm_cached_color *xpm_cache_color P_ ((struct frame *, char *, | |
3264 | XColor *, int)); | |
3265 | ||
3266 | /* An entry in a hash table used to cache color definitions of named | |
3267 | colors. This cache is necessary to speed up XPM image loading in | |
3268 | case we do color allocations ourselves. Without it, we would need | |
3269 | a call to XParseColor per pixel in the image. */ | |
3270 | ||
3271 | struct xpm_cached_color | |
3272 | { | |
3273 | /* Next in collision chain. */ | |
3274 | struct xpm_cached_color *next; | |
3275 | ||
3276 | /* Color definition (RGB and pixel color). */ | |
3277 | XColor color; | |
3278 | ||
3279 | /* Color name. */ | |
3280 | char name[1]; | |
3281 | }; | |
3282 | ||
3283 | /* The hash table used for the color cache, and its bucket vector | |
3284 | size. */ | |
3285 | ||
3286 | #define XPM_COLOR_CACHE_BUCKETS 1001 | |
3287 | struct xpm_cached_color **xpm_color_cache; | |
3288 | ||
3289 | /* Initialize the color cache. */ | |
3290 | ||
3291 | static void | |
3292 | xpm_init_color_cache (f, attrs) | |
3293 | struct frame *f; | |
3294 | XpmAttributes *attrs; | |
3295 | { | |
3296 | size_t nbytes = XPM_COLOR_CACHE_BUCKETS * sizeof *xpm_color_cache; | |
3297 | xpm_color_cache = (struct xpm_cached_color **) xmalloc (nbytes); | |
3298 | memset (xpm_color_cache, 0, nbytes); | |
3299 | init_color_table (); | |
3300 | ||
3301 | if (attrs->valuemask & XpmColorSymbols) | |
3302 | { | |
3303 | int i; | |
3304 | XColor color; | |
3305 | ||
3306 | for (i = 0; i < attrs->numsymbols; ++i) | |
3307 | if (XParseColor (FRAME_X_DISPLAY (f), FRAME_X_COLORMAP (f), | |
3308 | attrs->colorsymbols[i].value, &color)) | |
3309 | { | |
3310 | color.pixel = lookup_rgb_color (f, color.red, color.green, | |
3311 | color.blue); | |
3312 | xpm_cache_color (f, attrs->colorsymbols[i].name, &color, -1); | |
3313 | } | |
3314 | } | |
3315 | } | |
3316 | ||
3317 | /* Free the color cache. */ | |
3318 | ||
3319 | static void | |
3320 | xpm_free_color_cache () | |
3321 | { | |
3322 | struct xpm_cached_color *p, *next; | |
3323 | int i; | |
3324 | ||
3325 | for (i = 0; i < XPM_COLOR_CACHE_BUCKETS; ++i) | |
3326 | for (p = xpm_color_cache[i]; p; p = next) | |
3327 | { | |
3328 | next = p->next; | |
3329 | xfree (p); | |
3330 | } | |
3331 | ||
3332 | xfree (xpm_color_cache); | |
3333 | xpm_color_cache = NULL; | |
3334 | free_color_table (); | |
3335 | } | |
3336 | ||
3337 | /* Return the bucket index for color named COLOR_NAME in the color | |
3338 | cache. */ | |
3339 | ||
3340 | static int | |
3341 | xpm_color_bucket (color_name) | |
3342 | char *color_name; | |
3343 | { | |
3344 | unsigned h = 0; | |
3345 | char *s; | |
3346 | ||
3347 | for (s = color_name; *s; ++s) | |
3348 | h = (h << 2) ^ *s; | |
3349 | return h %= XPM_COLOR_CACHE_BUCKETS; | |
3350 | } | |
3351 | ||
3352 | ||
3353 | /* On frame F, cache values COLOR for color with name COLOR_NAME. | |
3354 | BUCKET, if >= 0, is a precomputed bucket index. Value is the cache | |
3355 | entry added. */ | |
3356 | ||
3357 | static struct xpm_cached_color * | |
3358 | xpm_cache_color (f, color_name, color, bucket) | |
3359 | struct frame *f; | |
3360 | char *color_name; | |
3361 | XColor *color; | |
3362 | int bucket; | |
3363 | { | |
3364 | size_t nbytes; | |
3365 | struct xpm_cached_color *p; | |
3366 | ||
3367 | if (bucket < 0) | |
3368 | bucket = xpm_color_bucket (color_name); | |
3369 | ||
3370 | nbytes = sizeof *p + strlen (color_name); | |
3371 | p = (struct xpm_cached_color *) xmalloc (nbytes); | |
3372 | strcpy (p->name, color_name); | |
3373 | p->color = *color; | |
3374 | p->next = xpm_color_cache[bucket]; | |
3375 | xpm_color_cache[bucket] = p; | |
3376 | return p; | |
3377 | } | |
3378 | ||
3379 | /* Look up color COLOR_NAME for frame F in the color cache. If found, | |
3380 | return the cached definition in *COLOR. Otherwise, make a new | |
3381 | entry in the cache and allocate the color. Value is zero if color | |
3382 | allocation failed. */ | |
3383 | ||
3384 | static int | |
3385 | xpm_lookup_color (f, color_name, color) | |
3386 | struct frame *f; | |
3387 | char *color_name; | |
3388 | XColor *color; | |
3389 | { | |
3390 | struct xpm_cached_color *p; | |
3391 | int h = xpm_color_bucket (color_name); | |
3392 | ||
3393 | for (p = xpm_color_cache[h]; p; p = p->next) | |
3394 | if (strcmp (p->name, color_name) == 0) | |
3395 | break; | |
3396 | ||
3397 | if (p != NULL) | |
3398 | *color = p->color; | |
3399 | else if (XParseColor (FRAME_X_DISPLAY (f), FRAME_X_COLORMAP (f), | |
3400 | color_name, color)) | |
3401 | { | |
3402 | color->pixel = lookup_rgb_color (f, color->red, color->green, | |
3403 | color->blue); | |
3404 | p = xpm_cache_color (f, color_name, color, h); | |
3405 | } | |
3406 | /* You get `opaque' at least from ImageMagick converting pbm to xpm | |
3407 | with transparency, and it's useful. */ | |
3408 | else if (strcmp ("opaque", color_name) == 0) | |
3409 | { | |
3410 | bzero (color, sizeof (XColor)); /* Is this necessary/correct? */ | |
3411 | color->pixel = FRAME_FOREGROUND_PIXEL (f); | |
3412 | p = xpm_cache_color (f, color_name, color, h); | |
3413 | } | |
3414 | ||
3415 | return p != NULL; | |
3416 | } | |
3417 | ||
3418 | ||
3419 | /* Callback for allocating color COLOR_NAME. Called from the XPM lib. | |
3420 | CLOSURE is a pointer to the frame on which we allocate the | |
3421 | color. Return in *COLOR the allocated color. Value is non-zero | |
3422 | if successful. */ | |
3423 | ||
3424 | static int | |
3425 | xpm_alloc_color (dpy, cmap, color_name, color, closure) | |
3426 | Display *dpy; | |
3427 | Colormap cmap; | |
3428 | char *color_name; | |
3429 | XColor *color; | |
3430 | void *closure; | |
3431 | { | |
3432 | return xpm_lookup_color ((struct frame *) closure, color_name, color); | |
3433 | } | |
3434 | ||
3435 | ||
3436 | /* Callback for freeing NPIXELS colors contained in PIXELS. CLOSURE | |
3437 | is a pointer to the frame on which we allocate the color. Value is | |
3438 | non-zero if successful. */ | |
3439 | ||
3440 | static int | |
3441 | xpm_free_colors (dpy, cmap, pixels, npixels, closure) | |
3442 | Display *dpy; | |
3443 | Colormap cmap; | |
3444 | Pixel *pixels; | |
3445 | int npixels; | |
3446 | void *closure; | |
3447 | { | |
3448 | return 1; | |
3449 | } | |
3450 | ||
3451 | #endif /* ALLOC_XPM_COLORS */ | |
3452 | ||
3453 | ||
3454 | #ifdef HAVE_NTGUI | |
3455 | ||
3456 | /* XPM library details. */ | |
3457 | ||
3458 | DEF_IMGLIB_FN (XpmFreeAttributes); | |
3459 | DEF_IMGLIB_FN (XpmCreateImageFromBuffer); | |
3460 | DEF_IMGLIB_FN (XpmReadFileToImage); | |
3461 | DEF_IMGLIB_FN (XImageFree); | |
3462 | ||
3463 | ||
3464 | static int | |
3465 | init_xpm_functions (void) | |
3466 | { | |
3467 | HMODULE library; | |
3468 | ||
3469 | if (!(library = LoadLibrary ("libXpm.dll"))) | |
3470 | return 0; | |
3471 | ||
3472 | LOAD_IMGLIB_FN (library, XpmFreeAttributes); | |
3473 | LOAD_IMGLIB_FN (library, XpmCreateImageFromBuffer); | |
3474 | LOAD_IMGLIB_FN (library, XpmReadFileToImage); | |
3475 | LOAD_IMGLIB_FN (library, XImageFree); | |
3476 | return 1; | |
3477 | } | |
3478 | ||
3479 | #endif /* HAVE_NTGUI */ | |
3480 | ||
3481 | ||
3482 | /* Value is non-zero if COLOR_SYMBOLS is a valid color symbols list | |
3483 | for XPM images. Such a list must consist of conses whose car and | |
3484 | cdr are strings. */ | |
3485 | ||
3486 | static int | |
3487 | xpm_valid_color_symbols_p (color_symbols) | |
3488 | Lisp_Object color_symbols; | |
3489 | { | |
3490 | while (CONSP (color_symbols)) | |
3491 | { | |
3492 | Lisp_Object sym = XCAR (color_symbols); | |
3493 | if (!CONSP (sym) | |
3494 | || !STRINGP (XCAR (sym)) | |
3495 | || !STRINGP (XCDR (sym))) | |
3496 | break; | |
3497 | color_symbols = XCDR (color_symbols); | |
3498 | } | |
3499 | ||
3500 | return NILP (color_symbols); | |
3501 | } | |
3502 | ||
3503 | ||
3504 | /* Value is non-zero if OBJECT is a valid XPM image specification. */ | |
3505 | ||
3506 | static int | |
3507 | xpm_image_p (object) | |
3508 | Lisp_Object object; | |
3509 | { | |
3510 | struct image_keyword fmt[XPM_LAST]; | |
3511 | bcopy (xpm_format, fmt, sizeof fmt); | |
3512 | return (parse_image_spec (object, fmt, XPM_LAST, Qxpm) | |
3513 | /* Either `:file' or `:data' must be present. */ | |
3514 | && fmt[XPM_FILE].count + fmt[XPM_DATA].count == 1 | |
3515 | /* Either no `:color-symbols' or it's a list of conses | |
3516 | whose car and cdr are strings. */ | |
3517 | && (fmt[XPM_COLOR_SYMBOLS].count == 0 | |
3518 | || xpm_valid_color_symbols_p (fmt[XPM_COLOR_SYMBOLS].value))); | |
3519 | } | |
3520 | ||
3521 | ||
3522 | /* Load image IMG which will be displayed on frame F. Value is | |
3523 | non-zero if successful. */ | |
3524 | ||
3525 | static int | |
3526 | xpm_load (f, img) | |
3527 | struct frame *f; | |
3528 | struct image *img; | |
3529 | { | |
3530 | int rc; | |
3531 | XpmAttributes attrs; | |
3532 | Lisp_Object specified_file, color_symbols; | |
3533 | #ifdef HAVE_NTGUI | |
3534 | HDC hdc; | |
3535 | xpm_XImage * xpm_image = NULL, * xpm_mask = NULL; | |
3536 | #endif /* HAVE_NTGUI */ | |
3537 | ||
3538 | /* Configure the XPM lib. Use the visual of frame F. Allocate | |
3539 | close colors. Return colors allocated. */ | |
3540 | bzero (&attrs, sizeof attrs); | |
3541 | ||
3542 | #ifndef HAVE_NTGUI | |
3543 | attrs.visual = FRAME_X_VISUAL (f); | |
3544 | attrs.colormap = FRAME_X_COLORMAP (f); | |
3545 | attrs.valuemask |= XpmVisual; | |
3546 | attrs.valuemask |= XpmColormap; | |
3547 | #endif /* HAVE_NTGUI */ | |
3548 | ||
3549 | #ifdef ALLOC_XPM_COLORS | |
3550 | /* Allocate colors with our own functions which handle | |
3551 | failing color allocation more gracefully. */ | |
3552 | attrs.color_closure = f; | |
3553 | attrs.alloc_color = xpm_alloc_color; | |
3554 | attrs.free_colors = xpm_free_colors; | |
3555 | attrs.valuemask |= XpmAllocColor | XpmFreeColors | XpmColorClosure; | |
3556 | #else /* not ALLOC_XPM_COLORS */ | |
3557 | /* Let the XPM lib allocate colors. */ | |
3558 | attrs.valuemask |= XpmReturnAllocPixels; | |
3559 | #ifdef XpmAllocCloseColors | |
3560 | attrs.alloc_close_colors = 1; | |
3561 | attrs.valuemask |= XpmAllocCloseColors; | |
3562 | #else /* not XpmAllocCloseColors */ | |
3563 | attrs.closeness = 600; | |
3564 | attrs.valuemask |= XpmCloseness; | |
3565 | #endif /* not XpmAllocCloseColors */ | |
3566 | #endif /* ALLOC_XPM_COLORS */ | |
3567 | ||
3568 | /* If image specification contains symbolic color definitions, add | |
3569 | these to `attrs'. */ | |
3570 | color_symbols = image_spec_value (img->spec, QCcolor_symbols, NULL); | |
3571 | if (CONSP (color_symbols)) | |
3572 | { | |
3573 | Lisp_Object tail; | |
3574 | XpmColorSymbol *xpm_syms; | |
3575 | int i, size; | |
3576 | ||
3577 | attrs.valuemask |= XpmColorSymbols; | |
3578 | ||
3579 | /* Count number of symbols. */ | |
3580 | attrs.numsymbols = 0; | |
3581 | for (tail = color_symbols; CONSP (tail); tail = XCDR (tail)) | |
3582 | ++attrs.numsymbols; | |
3583 | ||
3584 | /* Allocate an XpmColorSymbol array. */ | |
3585 | size = attrs.numsymbols * sizeof *xpm_syms; | |
3586 | xpm_syms = (XpmColorSymbol *) alloca (size); | |
3587 | bzero (xpm_syms, size); | |
3588 | attrs.colorsymbols = xpm_syms; | |
3589 | ||
3590 | /* Fill the color symbol array. */ | |
3591 | for (tail = color_symbols, i = 0; | |
3592 | CONSP (tail); | |
3593 | ++i, tail = XCDR (tail)) | |
3594 | { | |
3595 | Lisp_Object name = XCAR (XCAR (tail)); | |
3596 | Lisp_Object color = XCDR (XCAR (tail)); | |
3597 | xpm_syms[i].name = (char *) alloca (SCHARS (name) + 1); | |
3598 | strcpy (xpm_syms[i].name, SDATA (name)); | |
3599 | xpm_syms[i].value = (char *) alloca (SCHARS (color) + 1); | |
3600 | strcpy (xpm_syms[i].value, SDATA (color)); | |
3601 | } | |
3602 | } | |
3603 | ||
3604 | /* Create a pixmap for the image, either from a file, or from a | |
3605 | string buffer containing data in the same format as an XPM file. */ | |
3606 | #ifdef ALLOC_XPM_COLORS | |
3607 | xpm_init_color_cache (f, &attrs); | |
3608 | #endif | |
3609 | ||
3610 | specified_file = image_spec_value (img->spec, QCfile, NULL); | |
3611 | ||
3612 | #ifdef HAVE_NTGUI | |
3613 | { | |
3614 | HDC frame_dc = get_frame_dc (f); | |
3615 | hdc = CreateCompatibleDC (frame_dc); | |
3616 | release_frame_dc (f, frame_dc); | |
3617 | } | |
3618 | #endif /* HAVE_NTGUI */ | |
3619 | ||
3620 | if (STRINGP (specified_file)) | |
3621 | { | |
3622 | Lisp_Object file = x_find_image_file (specified_file); | |
3623 | if (!STRINGP (file)) | |
3624 | { | |
3625 | image_error ("Cannot find image file `%s'", specified_file, Qnil); | |
3626 | return 0; | |
3627 | } | |
3628 | ||
3629 | #ifdef HAVE_NTGUI | |
3630 | /* XpmReadFileToPixmap is not available in the Windows port of | |
3631 | libxpm. But XpmReadFileToImage almost does what we want. */ | |
3632 | rc = fn_XpmReadFileToImage (&hdc, SDATA (file), | |
3633 | &xpm_image, &xpm_mask, | |
3634 | &attrs); | |
3635 | #else | |
3636 | rc = XpmReadFileToPixmap (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), | |
3637 | SDATA (file), &img->pixmap, &img->mask, | |
3638 | &attrs); | |
3639 | #endif /* HAVE_NTGUI */ | |
3640 | } | |
3641 | else | |
3642 | { | |
3643 | Lisp_Object buffer = image_spec_value (img->spec, QCdata, NULL); | |
3644 | #ifdef HAVE_NTGUI | |
3645 | /* XpmCreatePixmapFromBuffer is not available in the Windows port | |
3646 | of libxpm. But XpmCreateImageFromBuffer almost does what we want. */ | |
3647 | rc = fn_XpmCreateImageFromBuffer (&hdc, SDATA (buffer), | |
3648 | &xpm_image, &xpm_mask, | |
3649 | &attrs); | |
3650 | #else | |
3651 | rc = XpmCreatePixmapFromBuffer (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), | |
3652 | SDATA (buffer), | |
3653 | &img->pixmap, &img->mask, | |
3654 | &attrs); | |
3655 | #endif /* HAVE_NTGUI */ | |
3656 | } | |
3657 | ||
3658 | if (rc == XpmSuccess) | |
3659 | { | |
3660 | #if defined (COLOR_TABLE_SUPPORT) && defined (ALLOC_XPM_COLORS) | |
3661 | img->colors = colors_in_color_table (&img->ncolors); | |
3662 | #else /* not ALLOC_XPM_COLORS */ | |
3663 | int i; | |
3664 | ||
3665 | #ifdef HAVE_NTGUI | |
3666 | /* W32 XPM uses XImage to wrap what W32 Emacs calls a Pixmap, | |
3667 | plus some duplicate attributes. */ | |
3668 | if (xpm_image && xpm_image->bitmap) | |
3669 | { | |
3670 | img->pixmap = xpm_image->bitmap; | |
3671 | /* XImageFree in libXpm frees XImage struct without destroying | |
3672 | the bitmap, which is what we want. */ | |
3673 | fn_XImageFree (xpm_image); | |
3674 | } | |
3675 | if (xpm_mask && xpm_mask->bitmap) | |
3676 | { | |
3677 | /* The mask appears to be inverted compared with what we expect. | |
3678 | TODO: invert our expectations. See other places where we | |
3679 | have to invert bits because our idea of masks is backwards. */ | |
3680 | HGDIOBJ old_obj; | |
3681 | old_obj = SelectObject (hdc, xpm_mask->bitmap); | |
3682 | ||
3683 | PatBlt (hdc, 0, 0, xpm_mask->width, xpm_mask->height, DSTINVERT); | |
3684 | SelectObject (hdc, old_obj); | |
3685 | ||
3686 | img->mask = xpm_mask->bitmap; | |
3687 | fn_XImageFree (xpm_mask); | |
3688 | DeleteDC (hdc); | |
3689 | } | |
3690 | ||
3691 | DeleteDC (hdc); | |
3692 | #endif /* HAVE_NTGUI */ | |
3693 | ||
3694 | /* Remember allocated colors. */ | |
3695 | img->ncolors = attrs.nalloc_pixels; | |
3696 | img->colors = (unsigned long *) xmalloc (img->ncolors | |
3697 | * sizeof *img->colors); | |
3698 | for (i = 0; i < attrs.nalloc_pixels; ++i) | |
3699 | { | |
3700 | img->colors[i] = attrs.alloc_pixels[i]; | |
3701 | #ifdef DEBUG_X_COLORS | |
3702 | register_color (img->colors[i]); | |
3703 | #endif | |
3704 | } | |
3705 | #endif /* not ALLOC_XPM_COLORS */ | |
3706 | ||
3707 | img->width = attrs.width; | |
3708 | img->height = attrs.height; | |
3709 | xassert (img->width > 0 && img->height > 0); | |
3710 | ||
3711 | /* The call to XpmFreeAttributes below frees attrs.alloc_pixels. */ | |
3712 | #ifdef HAVE_NTGUI | |
3713 | fn_XpmFreeAttributes (&attrs); | |
3714 | #else | |
3715 | XpmFreeAttributes (&attrs); | |
3716 | #endif /* HAVE_NTGUI */ | |
3717 | } | |
3718 | else | |
3719 | { | |
3720 | #ifdef HAVE_NTGUI | |
3721 | DeleteDC (hdc); | |
3722 | #endif /* HAVE_NTGUI */ | |
3723 | ||
3724 | switch (rc) | |
3725 | { | |
3726 | case XpmOpenFailed: | |
3727 | image_error ("Error opening XPM file (%s)", img->spec, Qnil); | |
3728 | break; | |
3729 | ||
3730 | case XpmFileInvalid: | |
3731 | image_error ("Invalid XPM file (%s)", img->spec, Qnil); | |
3732 | break; | |
3733 | ||
3734 | case XpmNoMemory: | |
3735 | image_error ("Out of memory (%s)", img->spec, Qnil); | |
3736 | break; | |
3737 | ||
3738 | case XpmColorFailed: | |
3739 | image_error ("Color allocation error (%s)", img->spec, Qnil); | |
3740 | break; | |
3741 | ||
3742 | default: | |
3743 | image_error ("Unknown error (%s)", img->spec, Qnil); | |
3744 | break; | |
3745 | } | |
3746 | } | |
3747 | ||
3748 | #ifdef ALLOC_XPM_COLORS | |
3749 | xpm_free_color_cache (); | |
3750 | #endif | |
3751 | return rc == XpmSuccess; | |
3752 | } | |
3753 | ||
3754 | #endif /* HAVE_XPM */ | |
3755 | ||
3756 | \f | |
3757 | /*********************************************************************** | |
3758 | Color table | |
3759 | ***********************************************************************/ | |
3760 | ||
3761 | #ifdef COLOR_TABLE_SUPPORT | |
3762 | ||
3763 | /* An entry in the color table mapping an RGB color to a pixel color. */ | |
3764 | ||
3765 | struct ct_color | |
3766 | { | |
3767 | int r, g, b; | |
3768 | unsigned long pixel; | |
3769 | ||
3770 | /* Next in color table collision list. */ | |
3771 | struct ct_color *next; | |
3772 | }; | |
3773 | ||
3774 | /* The bucket vector size to use. Must be prime. */ | |
3775 | ||
3776 | #define CT_SIZE 101 | |
3777 | ||
3778 | /* Value is a hash of the RGB color given by R, G, and B. */ | |
3779 | ||
3780 | #define CT_HASH_RGB(R, G, B) (((R) << 16) ^ ((G) << 8) ^ (B)) | |
3781 | ||
3782 | /* The color hash table. */ | |
3783 | ||
3784 | struct ct_color **ct_table; | |
3785 | ||
3786 | /* Number of entries in the color table. */ | |
3787 | ||
3788 | int ct_colors_allocated; | |
3789 | ||
3790 | /* Initialize the color table. */ | |
3791 | ||
3792 | static void | |
3793 | init_color_table () | |
3794 | { | |
3795 | int size = CT_SIZE * sizeof (*ct_table); | |
3796 | ct_table = (struct ct_color **) xmalloc (size); | |
3797 | bzero (ct_table, size); | |
3798 | ct_colors_allocated = 0; | |
3799 | } | |
3800 | ||
3801 | ||
3802 | /* Free memory associated with the color table. */ | |
3803 | ||
3804 | static void | |
3805 | free_color_table () | |
3806 | { | |
3807 | int i; | |
3808 | struct ct_color *p, *next; | |
3809 | ||
3810 | for (i = 0; i < CT_SIZE; ++i) | |
3811 | for (p = ct_table[i]; p; p = next) | |
3812 | { | |
3813 | next = p->next; | |
3814 | xfree (p); | |
3815 | } | |
3816 | ||
3817 | xfree (ct_table); | |
3818 | ct_table = NULL; | |
3819 | } | |
3820 | ||
3821 | ||
3822 | /* Value is a pixel color for RGB color R, G, B on frame F. If an | |
3823 | entry for that color already is in the color table, return the | |
3824 | pixel color of that entry. Otherwise, allocate a new color for R, | |
3825 | G, B, and make an entry in the color table. */ | |
3826 | ||
3827 | static unsigned long | |
3828 | lookup_rgb_color (f, r, g, b) | |
3829 | struct frame *f; | |
3830 | int r, g, b; | |
3831 | { | |
3832 | unsigned hash = CT_HASH_RGB (r, g, b); | |
3833 | int i = hash % CT_SIZE; | |
3834 | struct ct_color *p; | |
3835 | Display_Info *dpyinfo; | |
3836 | ||
3837 | /* Handle TrueColor visuals specially, which improves performance by | |
3838 | two orders of magnitude. Freeing colors on TrueColor visuals is | |
3839 | a nop, and pixel colors specify RGB values directly. See also | |
3840 | the Xlib spec, chapter 3.1. */ | |
3841 | dpyinfo = FRAME_X_DISPLAY_INFO (f); | |
3842 | if (dpyinfo->red_bits > 0) | |
3843 | { | |
3844 | unsigned long pr, pg, pb; | |
3845 | ||
3846 | /* Apply gamma-correction like normal color allocation does. */ | |
3847 | if (f->gamma) | |
3848 | { | |
3849 | XColor color; | |
3850 | color.red = r, color.green = g, color.blue = b; | |
3851 | gamma_correct (f, &color); | |
3852 | r = color.red, g = color.green, b = color.blue; | |
3853 | } | |
3854 | ||
3855 | /* Scale down RGB values to the visual's bits per RGB, and shift | |
3856 | them to the right position in the pixel color. Note that the | |
3857 | original RGB values are 16-bit values, as usual in X. */ | |
3858 | pr = (r >> (16 - dpyinfo->red_bits)) << dpyinfo->red_offset; | |
3859 | pg = (g >> (16 - dpyinfo->green_bits)) << dpyinfo->green_offset; | |
3860 | pb = (b >> (16 - dpyinfo->blue_bits)) << dpyinfo->blue_offset; | |
3861 | ||
3862 | /* Assemble the pixel color. */ | |
3863 | return pr | pg | pb; | |
3864 | } | |
1f026899 | 3865 | |
4ef0d4d0 KS |
3866 | for (p = ct_table[i]; p; p = p->next) |
3867 | if (p->r == r && p->g == g && p->b == b) | |
3868 | break; | |
3869 | ||
3870 | if (p == NULL) | |
3871 | { | |
3872 | ||
3873 | #ifdef HAVE_X_WINDOWS | |
3874 | XColor color; | |
3875 | Colormap cmap; | |
3876 | int rc; | |
3877 | ||
3878 | color.red = r; | |
3879 | color.green = g; | |
3880 | color.blue = b; | |
3881 | ||
3882 | cmap = FRAME_X_COLORMAP (f); | |
3883 | rc = x_alloc_nearest_color (f, cmap, &color); | |
3884 | if (rc) | |
3885 | { | |
3886 | ++ct_colors_allocated; | |
3887 | p = (struct ct_color *) xmalloc (sizeof *p); | |
3888 | p->r = r; | |
3889 | p->g = g; | |
3890 | p->b = b; | |
3891 | p->pixel = color.pixel; | |
3892 | p->next = ct_table[i]; | |
3893 | ct_table[i] = p; | |
3894 | } | |
3895 | else | |
3896 | return FRAME_FOREGROUND_PIXEL (f); | |
3897 | ||
3898 | #else | |
3899 | COLORREF color; | |
3900 | #ifdef HAVE_NTGUI | |
3901 | color = PALETTERGB (r, g, b); | |
3902 | #else | |
3903 | color = RGB_TO_ULONG (r, g, b); | |
3904 | #endif /* HAVE_NTGUI */ | |
3905 | ++ct_colors_allocated; | |
3906 | p = (struct ct_color *) xmalloc (sizeof *p); | |
3907 | p->r = r; | |
3908 | p->g = g; | |
3909 | p->b = b; | |
3910 | p->pixel = color; | |
3911 | p->next = ct_table[i]; | |
3912 | ct_table[i] = p; | |
3913 | #endif /* HAVE_X_WINDOWS */ | |
3914 | ||
3915 | } | |
3916 | ||
3917 | return p->pixel; | |
3918 | } | |
3919 | ||
3920 | ||
3921 | /* Look up pixel color PIXEL which is used on frame F in the color | |
3922 | table. If not already present, allocate it. Value is PIXEL. */ | |
3923 | ||
3924 | static unsigned long | |
3925 | lookup_pixel_color (f, pixel) | |
3926 | struct frame *f; | |
3927 | unsigned long pixel; | |
3928 | { | |
3929 | int i = pixel % CT_SIZE; | |
3930 | struct ct_color *p; | |
3931 | ||
3932 | for (p = ct_table[i]; p; p = p->next) | |
3933 | if (p->pixel == pixel) | |
3934 | break; | |
3935 | ||
3936 | if (p == NULL) | |
3937 | { | |
3938 | XColor color; | |
3939 | Colormap cmap; | |
3940 | int rc; | |
3941 | ||
3942 | #ifdef HAVE_X_WINDOWS | |
3943 | cmap = FRAME_X_COLORMAP (f); | |
3944 | color.pixel = pixel; | |
3945 | x_query_color (f, &color); | |
3946 | rc = x_alloc_nearest_color (f, cmap, &color); | |
3947 | #else | |
3948 | BLOCK_INPUT; | |
3949 | cmap = DefaultColormapOfScreen (FRAME_X_SCREEN (f)); | |
3950 | color.pixel = pixel; | |
3951 | XQueryColor (NULL, cmap, &color); | |
3952 | rc = x_alloc_nearest_color (f, cmap, &color); | |
3953 | UNBLOCK_INPUT; | |
3954 | #endif /* HAVE_X_WINDOWS */ | |
3955 | ||
3956 | if (rc) | |
3957 | { | |
3958 | ++ct_colors_allocated; | |
3959 | ||
3960 | p = (struct ct_color *) xmalloc (sizeof *p); | |
3961 | p->r = color.red; | |
3962 | p->g = color.green; | |
3963 | p->b = color.blue; | |
3964 | p->pixel = pixel; | |
3965 | p->next = ct_table[i]; | |
3966 | ct_table[i] = p; | |
3967 | } | |
3968 | else | |
3969 | return FRAME_FOREGROUND_PIXEL (f); | |
3970 | } | |
3971 | return p->pixel; | |
3972 | } | |
3973 | ||
3974 | ||
3975 | /* Value is a vector of all pixel colors contained in the color table, | |
3976 | allocated via xmalloc. Set *N to the number of colors. */ | |
3977 | ||
3978 | static unsigned long * | |
3979 | colors_in_color_table (n) | |
3980 | int *n; | |
3981 | { | |
3982 | int i, j; | |
3983 | struct ct_color *p; | |
3984 | unsigned long *colors; | |
3985 | ||
3986 | if (ct_colors_allocated == 0) | |
3987 | { | |
3988 | *n = 0; | |
3989 | colors = NULL; | |
3990 | } | |
3991 | else | |
3992 | { | |
3993 | colors = (unsigned long *) xmalloc (ct_colors_allocated | |
3994 | * sizeof *colors); | |
3995 | *n = ct_colors_allocated; | |
3996 | ||
3997 | for (i = j = 0; i < CT_SIZE; ++i) | |
3998 | for (p = ct_table[i]; p; p = p->next) | |
3999 | colors[j++] = p->pixel; | |
4000 | } | |
4001 | ||
4002 | return colors; | |
4003 | } | |
4004 | ||
4005 | #else /* COLOR_TABLE_SUPPORT */ | |
4006 | ||
4007 | static unsigned long | |
4008 | lookup_rgb_color (f, r, g, b) | |
4009 | struct frame *f; | |
4010 | int r, g, b; | |
4011 | { | |
4012 | unsigned long pixel; | |
4013 | ||
4014 | #ifdef MAC_OS | |
4015 | pixel = RGB_TO_ULONG (r >> 8, g >> 8, b >> 8); | |
4016 | gamma_correct (f, &pixel); | |
4017 | #endif /* MAC_OS */ | |
4018 | ||
4019 | #ifdef HAVE_NTGUI | |
4020 | pixel = PALETTERGB (r >> 8, g >> 8, b >> 8); | |
4021 | #endif /* HAVE_NTGUI */ | |
4022 | ||
4023 | return pixel; | |
4024 | } | |
4025 | ||
4026 | static void | |
4027 | init_color_table () | |
4028 | { | |
4029 | } | |
4030 | #endif /* COLOR_TABLE_SUPPORT */ | |
4031 | ||
4032 | \f | |
4033 | /*********************************************************************** | |
4034 | Algorithms | |
4035 | ***********************************************************************/ | |
4036 | ||
4037 | static XColor *x_to_xcolors P_ ((struct frame *, struct image *, int)); | |
4038 | static void x_from_xcolors P_ ((struct frame *, struct image *, XColor *)); | |
4039 | static void x_detect_edges P_ ((struct frame *, struct image *, int[9], int)); | |
4040 | ||
4041 | #ifdef HAVE_NTGUI | |
4042 | static void XPutPixel (XImagePtr , int, int, COLORREF); | |
4043 | #endif /* HAVE_NTGUI */ | |
4044 | ||
4045 | /* Non-zero means draw a cross on images having `:conversion | |
4046 | disabled'. */ | |
4047 | ||
4048 | int cross_disabled_images; | |
4049 | ||
4050 | /* Edge detection matrices for different edge-detection | |
4051 | strategies. */ | |
4052 | ||
4053 | static int emboss_matrix[9] = { | |
4054 | /* x - 1 x x + 1 */ | |
4055 | 2, -1, 0, /* y - 1 */ | |
4056 | -1, 0, 1, /* y */ | |
4057 | 0, 1, -2 /* y + 1 */ | |
4058 | }; | |
4059 | ||
4060 | static int laplace_matrix[9] = { | |
4061 | /* x - 1 x x + 1 */ | |
4062 | 1, 0, 0, /* y - 1 */ | |
4063 | 0, 0, 0, /* y */ | |
4064 | 0, 0, -1 /* y + 1 */ | |
4065 | }; | |
4066 | ||
4067 | /* Value is the intensity of the color whose red/green/blue values | |
4068 | are R, G, and B. */ | |
4069 | ||
4070 | #define COLOR_INTENSITY(R, G, B) ((2 * (R) + 3 * (G) + (B)) / 6) | |
4071 | ||
4072 | ||
4073 | /* On frame F, return an array of XColor structures describing image | |
4074 | IMG->pixmap. Each XColor structure has its pixel color set. RGB_P | |
4075 | non-zero means also fill the red/green/blue members of the XColor | |
4076 | structures. Value is a pointer to the array of XColors structures, | |
4077 | allocated with xmalloc; it must be freed by the caller. */ | |
4078 | ||
4079 | static XColor * | |
4080 | x_to_xcolors (f, img, rgb_p) | |
4081 | struct frame *f; | |
4082 | struct image *img; | |
4083 | int rgb_p; | |
4084 | { | |
4085 | int x, y; | |
4086 | XColor *colors, *p; | |
4087 | XImagePtr_or_DC ximg; | |
4088 | #ifdef HAVE_NTGUI | |
4089 | HDC hdc; | |
4090 | HGDIOBJ prev; | |
4091 | #endif /* HAVE_NTGUI */ | |
4092 | ||
4093 | colors = (XColor *) xmalloc (img->width * img->height * sizeof *colors); | |
4094 | ||
4095 | #ifndef HAVE_NTGUI | |
4096 | /* Get the X image IMG->pixmap. */ | |
4097 | ximg = XGetImage (FRAME_X_DISPLAY (f), img->pixmap, | |
4098 | 0, 0, img->width, img->height, ~0, ZPixmap); | |
4099 | #else | |
4100 | /* Load the image into a memory device context. */ | |
4101 | hdc = get_frame_dc (f); | |
4102 | ximg = CreateCompatibleDC (hdc); | |
4103 | release_frame_dc (f, hdc); | |
4104 | prev = SelectObject (ximg, img->pixmap); | |
4105 | #endif /* HAVE_NTGUI */ | |
4106 | ||
4107 | /* Fill the `pixel' members of the XColor array. I wished there | |
4108 | were an easy and portable way to circumvent XGetPixel. */ | |
4109 | p = colors; | |
4110 | for (y = 0; y < img->height; ++y) | |
4111 | { | |
4112 | XColor *row = p; | |
4113 | ||
4114 | #ifdef HAVE_X_WINDOWS | |
4115 | for (x = 0; x < img->width; ++x, ++p) | |
4116 | p->pixel = XGetPixel (ximg, x, y); | |
4117 | if (rgb_p) | |
4118 | x_query_colors (f, row, img->width); | |
4119 | ||
4120 | #else | |
4121 | ||
4122 | for (x = 0; x < img->width; ++x, ++p) | |
4123 | { | |
4124 | /* W32_TODO: palette support needed here? */ | |
4125 | p->pixel = GET_PIXEL (ximg, x, y); | |
4126 | if (rgb_p) | |
4127 | { | |
4128 | #ifdef MAC_OS | |
4129 | p->red = RED16_FROM_ULONG (p->pixel); | |
4130 | p->green = GREEN16_FROM_ULONG (p->pixel); | |
4131 | p->blue = BLUE16_FROM_ULONG (p->pixel); | |
4132 | #endif /* MAC_OS */ | |
4133 | #ifdef HAVE_NTGUI | |
4134 | p->red = 256 * GetRValue (p->pixel); | |
4135 | p->green = 256 * GetGValue (p->pixel); | |
4136 | p->blue = 256 * GetBValue (p->pixel); | |
4137 | #endif /* HAVE_NTGUI */ | |
4138 | } | |
4139 | } | |
4140 | #endif /* HAVE_X_WINDOWS */ | |
4141 | } | |
4142 | ||
4143 | Destroy_Image (ximg, prev); | |
4144 | ||
4145 | return colors; | |
4146 | } | |
4147 | ||
4148 | #ifdef HAVE_NTGUI | |
4149 | ||
4150 | /* Put a pixel of COLOR at position X, Y in XIMG. XIMG must have been | |
4151 | created with CreateDIBSection, with the pointer to the bit values | |
4152 | stored in ximg->data. */ | |
4153 | ||
4154 | static void XPutPixel (ximg, x, y, color) | |
4155 | XImagePtr ximg; | |
4156 | int x, y; | |
4157 | COLORREF color; | |
4158 | { | |
4159 | int width = ximg->info.bmiHeader.biWidth; | |
4160 | int height = ximg->info.bmiHeader.biHeight; | |
4161 | unsigned char * pixel; | |
4162 | ||
4163 | /* True color images. */ | |
4164 | if (ximg->info.bmiHeader.biBitCount == 24) | |
4165 | { | |
4166 | int rowbytes = width * 3; | |
4167 | /* Ensure scanlines are aligned on 4 byte boundaries. */ | |
4168 | if (rowbytes % 4) | |
4169 | rowbytes += 4 - (rowbytes % 4); | |
4170 | ||
4171 | pixel = ximg->data + y * rowbytes + x * 3; | |
4172 | /* Windows bitmaps are in BGR order. */ | |
4173 | *pixel = GetBValue (color); | |
4174 | *(pixel + 1) = GetGValue (color); | |
4175 | *(pixel + 2) = GetRValue (color); | |
4176 | } | |
4177 | /* Monochrome images. */ | |
4178 | else if (ximg->info.bmiHeader.biBitCount == 1) | |
4179 | { | |
4180 | int rowbytes = width / 8; | |
4181 | /* Ensure scanlines are aligned on 4 byte boundaries. */ | |
4182 | if (rowbytes % 4) | |
4183 | rowbytes += 4 - (rowbytes % 4); | |
4184 | pixel = ximg->data + y * rowbytes + x / 8; | |
4185 | /* Filter out palette info. */ | |
4186 | if (color & 0x00ffffff) | |
4187 | *pixel = *pixel | (1 << x % 8); | |
4188 | else | |
4189 | *pixel = *pixel & ~(1 << x % 8); | |
4190 | } | |
4191 | else | |
4192 | image_error ("XPutPixel: palette image not supported", Qnil, Qnil); | |
4193 | } | |
4194 | ||
4195 | #endif /* HAVE_NTGUI */ | |
4196 | ||
4197 | /* Create IMG->pixmap from an array COLORS of XColor structures, whose | |
4198 | RGB members are set. F is the frame on which this all happens. | |
4199 | COLORS will be freed; an existing IMG->pixmap will be freed, too. */ | |
4200 | ||
4201 | static void | |
4202 | x_from_xcolors (f, img, colors) | |
4203 | struct frame *f; | |
4204 | struct image *img; | |
4205 | XColor *colors; | |
4206 | { | |
4207 | int x, y; | |
4208 | XImagePtr oimg; | |
4209 | Pixmap pixmap; | |
4210 | XColor *p; | |
4211 | ||
4212 | init_color_table (); | |
4213 | ||
4214 | x_create_x_image_and_pixmap (f, img->width, img->height, 0, | |
4215 | &oimg, &pixmap); | |
4216 | p = colors; | |
4217 | for (y = 0; y < img->height; ++y) | |
4218 | for (x = 0; x < img->width; ++x, ++p) | |
4219 | { | |
4220 | unsigned long pixel; | |
4221 | pixel = lookup_rgb_color (f, p->red, p->green, p->blue); | |
4222 | XPutPixel (oimg, x, y, pixel); | |
4223 | } | |
4224 | ||
4225 | xfree (colors); | |
4226 | x_clear_image_1 (f, img, 1, 0, 1); | |
4227 | ||
4228 | x_put_x_image (f, oimg, pixmap, img->width, img->height); | |
4229 | x_destroy_x_image (oimg); | |
4230 | img->pixmap = pixmap; | |
4231 | #ifdef COLOR_TABLE_SUPPORT | |
4232 | img->colors = colors_in_color_table (&img->ncolors); | |
4233 | free_color_table (); | |
4234 | #endif /* COLOR_TABLE_SUPPORT */ | |
4235 | } | |
4236 | ||
4237 | ||
4238 | /* On frame F, perform edge-detection on image IMG. | |
4239 | ||
4240 | MATRIX is a nine-element array specifying the transformation | |
4241 | matrix. See emboss_matrix for an example. | |
4242 | ||
4243 | COLOR_ADJUST is a color adjustment added to each pixel of the | |
4244 | outgoing image. */ | |
4245 | ||
4246 | static void | |
4247 | x_detect_edges (f, img, matrix, color_adjust) | |
4248 | struct frame *f; | |
4249 | struct image *img; | |
4250 | int matrix[9], color_adjust; | |
4251 | { | |
4252 | XColor *colors = x_to_xcolors (f, img, 1); | |
4253 | XColor *new, *p; | |
4254 | int x, y, i, sum; | |
4255 | ||
4256 | for (i = sum = 0; i < 9; ++i) | |
4257 | sum += abs (matrix[i]); | |
4258 | ||
4259 | #define COLOR(A, X, Y) ((A) + (Y) * img->width + (X)) | |
4260 | ||
4261 | new = (XColor *) xmalloc (img->width * img->height * sizeof *new); | |
4262 | ||
4263 | for (y = 0; y < img->height; ++y) | |
4264 | { | |
4265 | p = COLOR (new, 0, y); | |
4266 | p->red = p->green = p->blue = 0xffff/2; | |
4267 | p = COLOR (new, img->width - 1, y); | |
4268 | p->red = p->green = p->blue = 0xffff/2; | |
4269 | } | |
4270 | ||
4271 | for (x = 1; x < img->width - 1; ++x) | |
4272 | { | |
4273 | p = COLOR (new, x, 0); | |
4274 | p->red = p->green = p->blue = 0xffff/2; | |
4275 | p = COLOR (new, x, img->height - 1); | |
4276 | p->red = p->green = p->blue = 0xffff/2; | |
4277 | } | |
4278 | ||
4279 | for (y = 1; y < img->height - 1; ++y) | |
4280 | { | |
4281 | p = COLOR (new, 1, y); | |
4282 | ||
4283 | for (x = 1; x < img->width - 1; ++x, ++p) | |
4284 | { | |
4285 | int r, g, b, y1, x1; | |
4286 | ||
4287 | r = g = b = i = 0; | |
4288 | for (y1 = y - 1; y1 < y + 2; ++y1) | |
4289 | for (x1 = x - 1; x1 < x + 2; ++x1, ++i) | |
4290 | if (matrix[i]) | |
4291 | { | |
4292 | XColor *t = COLOR (colors, x1, y1); | |
4293 | r += matrix[i] * t->red; | |
4294 | g += matrix[i] * t->green; | |
4295 | b += matrix[i] * t->blue; | |
4296 | } | |
4297 | ||
4298 | r = (r / sum + color_adjust) & 0xffff; | |
4299 | g = (g / sum + color_adjust) & 0xffff; | |
4300 | b = (b / sum + color_adjust) & 0xffff; | |
4301 | p->red = p->green = p->blue = COLOR_INTENSITY (r, g, b); | |
4302 | } | |
4303 | } | |
4304 | ||
4305 | xfree (colors); | |
4306 | x_from_xcolors (f, img, new); | |
4307 | ||
4308 | #undef COLOR | |
4309 | } | |
4310 | ||
4311 | ||
4312 | /* Perform the pre-defined `emboss' edge-detection on image IMG | |
4313 | on frame F. */ | |
4314 | ||
4315 | static void | |
4316 | x_emboss (f, img) | |
4317 | struct frame *f; | |
4318 | struct image *img; | |
4319 | { | |
4320 | x_detect_edges (f, img, emboss_matrix, 0xffff / 2); | |
4321 | } | |
4322 | ||
4323 | ||
4324 | /* Transform image IMG which is used on frame F with a Laplace | |
4325 | edge-detection algorithm. The result is an image that can be used | |
4326 | to draw disabled buttons, for example. */ | |
4327 | ||
4328 | static void | |
4329 | x_laplace (f, img) | |
4330 | struct frame *f; | |
4331 | struct image *img; | |
4332 | { | |
4333 | x_detect_edges (f, img, laplace_matrix, 45000); | |
4334 | } | |
4335 | ||
4336 | ||
4337 | /* Perform edge-detection on image IMG on frame F, with specified | |
4338 | transformation matrix MATRIX and color-adjustment COLOR_ADJUST. | |
4339 | ||
4340 | MATRIX must be either | |
4341 | ||
4342 | - a list of at least 9 numbers in row-major form | |
4343 | - a vector of at least 9 numbers | |
4344 | ||
4345 | COLOR_ADJUST nil means use a default; otherwise it must be a | |
4346 | number. */ | |
4347 | ||
4348 | static void | |
4349 | x_edge_detection (f, img, matrix, color_adjust) | |
4350 | struct frame *f; | |
4351 | struct image *img; | |
4352 | Lisp_Object matrix, color_adjust; | |
4353 | { | |
4354 | int i = 0; | |
4355 | int trans[9]; | |
4356 | ||
4357 | if (CONSP (matrix)) | |
4358 | { | |
4359 | for (i = 0; | |
4360 | i < 9 && CONSP (matrix) && NUMBERP (XCAR (matrix)); | |
4361 | ++i, matrix = XCDR (matrix)) | |
4362 | trans[i] = XFLOATINT (XCAR (matrix)); | |
4363 | } | |
4364 | else if (VECTORP (matrix) && ASIZE (matrix) >= 9) | |
4365 | { | |
4366 | for (i = 0; i < 9 && NUMBERP (AREF (matrix, i)); ++i) | |
4367 | trans[i] = XFLOATINT (AREF (matrix, i)); | |
4368 | } | |
4369 | ||
4370 | if (NILP (color_adjust)) | |
4371 | color_adjust = make_number (0xffff / 2); | |
4372 | ||
4373 | if (i == 9 && NUMBERP (color_adjust)) | |
4374 | x_detect_edges (f, img, trans, (int) XFLOATINT (color_adjust)); | |
4375 | } | |
4376 | ||
4377 | ||
4378 | /* Transform image IMG on frame F so that it looks disabled. */ | |
4379 | ||
4380 | static void | |
4381 | x_disable_image (f, img) | |
4382 | struct frame *f; | |
4383 | struct image *img; | |
4384 | { | |
4385 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); | |
4386 | #ifdef HAVE_NTGUI | |
4387 | int n_planes = dpyinfo->n_planes * dpyinfo->n_cbits; | |
4388 | #else | |
4389 | int n_planes = dpyinfo->n_planes; | |
4390 | #endif /* HAVE_NTGUI */ | |
4391 | ||
4392 | if (n_planes >= 2) | |
4393 | { | |
4394 | /* Color (or grayscale). Convert to gray, and equalize. Just | |
4395 | drawing such images with a stipple can look very odd, so | |
4396 | we're using this method instead. */ | |
4397 | XColor *colors = x_to_xcolors (f, img, 1); | |
4398 | XColor *p, *end; | |
4399 | const int h = 15000; | |
4400 | const int l = 30000; | |
4401 | ||
4402 | for (p = colors, end = colors + img->width * img->height; | |
4403 | p < end; | |
4404 | ++p) | |
4405 | { | |
4406 | int i = COLOR_INTENSITY (p->red, p->green, p->blue); | |
4407 | int i2 = (0xffff - h - l) * i / 0xffff + l; | |
4408 | p->red = p->green = p->blue = i2; | |
4409 | } | |
4410 | ||
4411 | x_from_xcolors (f, img, colors); | |
4412 | } | |
4413 | ||
4414 | /* Draw a cross over the disabled image, if we must or if we | |
4415 | should. */ | |
4416 | if (n_planes < 2 || cross_disabled_images) | |
4417 | { | |
4418 | #ifndef HAVE_NTGUI | |
4419 | Display *dpy = FRAME_X_DISPLAY (f); | |
4420 | GC gc; | |
4421 | ||
4422 | #ifdef MAC_OS | |
4423 | #define XCreateGC_pixmap(dpy, pixmap) XCreateGC (dpy, NULL, 0, NULL) | |
4424 | #define MaskForeground(f) PIX_MASK_DRAW (f) | |
4425 | #else | |
4426 | #define XCreateGC_pixmap(dpy, pixmap) XCreateGC (dpy, pixmap, 0, NULL) | |
4427 | #define MaskForeground(f) WHITE_PIX_DEFAULT (f) | |
4428 | #endif | |
4429 | ||
4430 | gc = XCreateGC_pixmap (dpy, img->pixmap); | |
4431 | XSetForeground (dpy, gc, BLACK_PIX_DEFAULT (f)); | |
4432 | XDrawLine (dpy, img->pixmap, gc, 0, 0, | |
4433 | img->width - 1, img->height - 1); | |
4434 | XDrawLine (dpy, img->pixmap, gc, 0, img->height - 1, | |
4435 | img->width - 1, 0); | |
4436 | XFreeGC (dpy, gc); | |
4437 | ||
4438 | if (img->mask) | |
4439 | { | |
4440 | gc = XCreateGC_pixmap (dpy, img->mask); | |
4441 | XSetForeground (dpy, gc, MaskForeground (f)); | |
4442 | XDrawLine (dpy, img->mask, gc, 0, 0, | |
4443 | img->width - 1, img->height - 1); | |
4444 | XDrawLine (dpy, img->mask, gc, 0, img->height - 1, | |
4445 | img->width - 1, 0); | |
4446 | XFreeGC (dpy, gc); | |
4447 | } | |
4448 | #else | |
4449 | HDC hdc, bmpdc; | |
4450 | HGDIOBJ prev; | |
4451 | ||
4452 | hdc = get_frame_dc (f); | |
4453 | bmpdc = CreateCompatibleDC (hdc); | |
4454 | release_frame_dc (f, hdc); | |
4455 | ||
4456 | prev = SelectObject (bmpdc, img->pixmap); | |
4457 | ||
4458 | SetTextColor (bmpdc, BLACK_PIX_DEFAULT (f)); | |
4459 | MoveToEx (bmpdc, 0, 0, NULL); | |
4460 | LineTo (bmpdc, img->width - 1, img->height - 1); | |
4461 | MoveToEx (bmpdc, 0, img->height - 1, NULL); | |
4462 | LineTo (bmpdc, img->width - 1, 0); | |
4463 | ||
4464 | if (img->mask) | |
4465 | { | |
4466 | SelectObject (bmpdc, img->mask); | |
4467 | SetTextColor (bmpdc, WHITE_PIX_DEFAULT (f)); | |
4468 | MoveToEx (bmpdc, 0, 0, NULL); | |
4469 | LineTo (bmpdc, img->width - 1, img->height - 1); | |
4470 | MoveToEx (bmpdc, 0, img->height - 1, NULL); | |
4471 | LineTo (bmpdc, img->width - 1, 0); | |
4472 | } | |
4473 | SelectObject (bmpdc, prev); | |
4474 | DeleteDC (bmpdc); | |
4475 | #endif /* HAVE_NTGUI */ | |
4476 | } | |
4477 | } | |
4478 | ||
4479 | ||
4480 | /* Build a mask for image IMG which is used on frame F. FILE is the | |
4481 | name of an image file, for error messages. HOW determines how to | |
4482 | determine the background color of IMG. If it is a list '(R G B)', | |
4483 | with R, G, and B being integers >= 0, take that as the color of the | |
4484 | background. Otherwise, determine the background color of IMG | |
4485 | heuristically. Value is non-zero if successful. */ | |
4486 | ||
4487 | static int | |
4488 | x_build_heuristic_mask (f, img, how) | |
4489 | struct frame *f; | |
4490 | struct image *img; | |
4491 | Lisp_Object how; | |
4492 | { | |
4493 | XImagePtr_or_DC ximg; | |
4494 | #ifndef HAVE_NTGUI | |
4495 | XImagePtr mask_img; | |
4496 | #else | |
4497 | HDC frame_dc; | |
4498 | HGDIOBJ prev; | |
4499 | char *mask_img; | |
4500 | int row_width; | |
4501 | #endif /* HAVE_NTGUI */ | |
4502 | int x, y, rc, use_img_background; | |
4503 | unsigned long bg = 0; | |
4504 | ||
4505 | if (img->mask) | |
4506 | { | |
4507 | Free_Pixmap (FRAME_X_DISPLAY (f), img->mask); | |
4508 | img->mask = NO_PIXMAP; | |
4509 | img->background_transparent_valid = 0; | |
4510 | } | |
4511 | ||
4512 | #ifndef HAVE_NTGUI | |
4513 | /* Create an image and pixmap serving as mask. */ | |
4514 | rc = x_create_x_image_and_pixmap (f, img->width, img->height, 1, | |
4515 | &mask_img, &img->mask); | |
4516 | if (!rc) | |
4517 | return 0; | |
4518 | ||
4519 | /* Get the X image of IMG->pixmap. */ | |
4520 | ximg = XGetImage (FRAME_X_DISPLAY (f), img->pixmap, 0, 0, | |
4521 | img->width, img->height, | |
4522 | ~0, ZPixmap); | |
4523 | #else | |
4524 | /* Create the bit array serving as mask. */ | |
4525 | row_width = (img->width + 7) / 8; | |
4526 | mask_img = xmalloc (row_width * img->height); | |
4527 | bzero (mask_img, row_width * img->height); | |
4528 | ||
4529 | /* Create a memory device context for IMG->pixmap. */ | |
4530 | frame_dc = get_frame_dc (f); | |
4531 | ximg = CreateCompatibleDC (frame_dc); | |
4532 | release_frame_dc (f, frame_dc); | |
4533 | prev = SelectObject (ximg, img->pixmap); | |
4534 | #endif /* HAVE_NTGUI */ | |
4535 | ||
4536 | /* Determine the background color of ximg. If HOW is `(R G B)' | |
4537 | take that as color. Otherwise, use the image's background color. */ | |
4538 | use_img_background = 1; | |
4539 | ||
4540 | if (CONSP (how)) | |
4541 | { | |
4542 | int rgb[3], i; | |
4543 | ||
4544 | for (i = 0; i < 3 && CONSP (how) && NATNUMP (XCAR (how)); ++i) | |
4545 | { | |
4546 | rgb[i] = XFASTINT (XCAR (how)) & 0xffff; | |
4547 | how = XCDR (how); | |
4548 | } | |
4549 | ||
4550 | if (i == 3 && NILP (how)) | |
4551 | { | |
4552 | char color_name[30]; | |
4553 | sprintf (color_name, "#%04x%04x%04x", rgb[0], rgb[1], rgb[2]); | |
4554 | bg = ( | |
4555 | #ifdef HAVE_NTGUI | |
4556 | 0x00ffffff & /* Filter out palette info. */ | |
4557 | #endif /* HAVE_NTGUI */ | |
4558 | x_alloc_image_color (f, img, build_string (color_name), 0)); | |
4559 | use_img_background = 0; | |
4560 | } | |
4561 | } | |
4562 | ||
4563 | if (use_img_background) | |
4564 | bg = four_corners_best (ximg, img->width, img->height); | |
4565 | ||
4566 | /* Set all bits in mask_img to 1 whose color in ximg is different | |
4567 | from the background color bg. */ | |
4568 | #ifndef HAVE_NTGUI | |
4569 | for (y = 0; y < img->height; ++y) | |
4570 | for (x = 0; x < img->width; ++x) | |
4571 | XPutPixel (mask_img, x, y, (XGetPixel (ximg, x, y) != bg | |
4572 | ? PIX_MASK_DRAW (f) : PIX_MASK_RETAIN (f))); | |
4573 | ||
4574 | /* Fill in the background_transparent field while we have the mask handy. */ | |
4575 | image_background_transparent (img, f, mask_img); | |
4576 | ||
4577 | /* Put mask_img into img->mask. */ | |
4578 | x_put_x_image (f, mask_img, img->mask, img->width, img->height); | |
4579 | x_destroy_x_image (mask_img); | |
4580 | ||
4581 | #else | |
4582 | for (y = 0; y < img->height; ++y) | |
4583 | for (x = 0; x < img->width; ++x) | |
4584 | { | |
4585 | COLORREF p = GetPixel (ximg, x, y); | |
4586 | if (p != bg) | |
4587 | mask_img[y * row_width + x / 8] |= 1 << (x % 8); | |
4588 | } | |
4589 | ||
4590 | /* Create the mask image. */ | |
4591 | img->mask = w32_create_pixmap_from_bitmap_data (img->width, img->height, | |
4592 | mask_img); | |
4593 | /* Fill in the background_transparent field while we have the mask handy. */ | |
4594 | SelectObject (ximg, img->mask); | |
4595 | image_background_transparent (img, f, ximg); | |
4596 | ||
4597 | /* Was: x_destroy_x_image ((XImagePtr )mask_img); which seems bogus ++kfs */ | |
4598 | xfree (mask_img); | |
4599 | #endif /* HAVE_NTGUI */ | |
4600 | ||
4601 | Destroy_Image (ximg, prev); | |
4602 | ||
4603 | return 1; | |
4604 | } | |
4605 | ||
4606 | \f | |
4607 | /*********************************************************************** | |
4608 | PBM (mono, gray, color) | |
4609 | ***********************************************************************/ | |
4610 | ||
4611 | static int pbm_image_p P_ ((Lisp_Object object)); | |
4612 | static int pbm_load P_ ((struct frame *f, struct image *img)); | |
4613 | static int pbm_scan_number P_ ((unsigned char **, unsigned char *)); | |
4614 | ||
4615 | /* The symbol `pbm' identifying images of this type. */ | |
4616 | ||
4617 | Lisp_Object Qpbm; | |
4618 | ||
4619 | /* Indices of image specification fields in gs_format, below. */ | |
4620 | ||
4621 | enum pbm_keyword_index | |
4622 | { | |
4623 | PBM_TYPE, | |
4624 | PBM_FILE, | |
4625 | PBM_DATA, | |
4626 | PBM_ASCENT, | |
4627 | PBM_MARGIN, | |
4628 | PBM_RELIEF, | |
4629 | PBM_ALGORITHM, | |
4630 | PBM_HEURISTIC_MASK, | |
4631 | PBM_MASK, | |
4632 | PBM_FOREGROUND, | |
4633 | PBM_BACKGROUND, | |
4634 | PBM_LAST | |
4635 | }; | |
4636 | ||
4637 | /* Vector of image_keyword structures describing the format | |
4638 | of valid user-defined image specifications. */ | |
4639 | ||
4640 | static struct image_keyword pbm_format[PBM_LAST] = | |
4641 | { | |
4642 | {":type", IMAGE_SYMBOL_VALUE, 1}, | |
4643 | {":file", IMAGE_STRING_VALUE, 0}, | |
4644 | {":data", IMAGE_STRING_VALUE, 0}, | |
4645 | {":ascent", IMAGE_ASCENT_VALUE, 0}, | |
4646 | {":margin", IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR, 0}, | |
4647 | {":relief", IMAGE_INTEGER_VALUE, 0}, | |
4648 | {":conversion", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, | |
4649 | {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, | |
4650 | {":mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, | |
4651 | {":foreground", IMAGE_STRING_OR_NIL_VALUE, 0}, | |
4652 | {":background", IMAGE_STRING_OR_NIL_VALUE, 0} | |
4653 | }; | |
4654 | ||
4655 | /* Structure describing the image type `pbm'. */ | |
4656 | ||
4657 | static struct image_type pbm_type = | |
4658 | { | |
4659 | &Qpbm, | |
4660 | pbm_image_p, | |
4661 | pbm_load, | |
4662 | x_clear_image, | |
4663 | NULL | |
4664 | }; | |
4665 | ||
4666 | ||
4667 | /* Return non-zero if OBJECT is a valid PBM image specification. */ | |
4668 | ||
4669 | static int | |
4670 | pbm_image_p (object) | |
4671 | Lisp_Object object; | |
4672 | { | |
4673 | struct image_keyword fmt[PBM_LAST]; | |
4674 | ||
4675 | bcopy (pbm_format, fmt, sizeof fmt); | |
4676 | ||
4677 | if (!parse_image_spec (object, fmt, PBM_LAST, Qpbm)) | |
4678 | return 0; | |
4679 | ||
4680 | /* Must specify either :data or :file. */ | |
4681 | return fmt[PBM_DATA].count + fmt[PBM_FILE].count == 1; | |
4682 | } | |
4683 | ||
4684 | ||
4685 | /* Scan a decimal number from *S and return it. Advance *S while | |
4686 | reading the number. END is the end of the string. Value is -1 at | |
4687 | end of input. */ | |
4688 | ||
4689 | static int | |
4690 | pbm_scan_number (s, end) | |
4691 | unsigned char **s, *end; | |
4692 | { | |
4693 | int c = 0, val = -1; | |
4694 | ||
4695 | while (*s < end) | |
4696 | { | |
4697 | /* Skip white-space. */ | |
4698 | while (*s < end && (c = *(*s)++, isspace (c))) | |
4699 | ; | |
4700 | ||
4701 | if (c == '#') | |
4702 | { | |
4703 | /* Skip comment to end of line. */ | |
4704 | while (*s < end && (c = *(*s)++, c != '\n')) | |
4705 | ; | |
4706 | } | |
4707 | else if (isdigit (c)) | |
4708 | { | |
4709 | /* Read decimal number. */ | |
4710 | val = c - '0'; | |
4711 | while (*s < end && (c = *(*s)++, isdigit (c))) | |
4712 | val = 10 * val + c - '0'; | |
4713 | break; | |
4714 | } | |
4715 | else | |
4716 | break; | |
4717 | } | |
4718 | ||
4719 | return val; | |
4720 | } | |
4721 | ||
4722 | ||
4723 | #ifdef HAVE_NTGUI | |
4724 | #if 0 /* Unused. ++kfs */ | |
4725 | ||
4726 | /* Read FILE into memory. Value is a pointer to a buffer allocated | |
4727 | with xmalloc holding FILE's contents. Value is null if an error | |
4728 | occurred. *SIZE is set to the size of the file. */ | |
4729 | ||
4730 | static char * | |
4731 | pbm_read_file (file, size) | |
4732 | Lisp_Object file; | |
4733 | int *size; | |
4734 | { | |
4735 | FILE *fp = NULL; | |
4736 | char *buf = NULL; | |
4737 | struct stat st; | |
4738 | ||
4739 | if (stat (SDATA (file), &st) == 0 | |
4740 | && (fp = fopen (SDATA (file), "rb")) != NULL | |
4741 | && (buf = (char *) xmalloc (st.st_size), | |
4742 | fread (buf, 1, st.st_size, fp) == st.st_size)) | |
4743 | { | |
4744 | *size = st.st_size; | |
4745 | fclose (fp); | |
4746 | } | |
4747 | else | |
4748 | { | |
4749 | if (fp) | |
4750 | fclose (fp); | |
4751 | if (buf) | |
4752 | { | |
4753 | xfree (buf); | |
4754 | buf = NULL; | |
4755 | } | |
4756 | } | |
4757 | ||
4758 | return buf; | |
4759 | } | |
4760 | #endif | |
4761 | #endif /* HAVE_NTGUI */ | |
4762 | ||
4763 | /* Load PBM image IMG for use on frame F. */ | |
4764 | ||
4765 | static int | |
4766 | pbm_load (f, img) | |
4767 | struct frame *f; | |
4768 | struct image *img; | |
4769 | { | |
4770 | int raw_p, x, y; | |
4771 | int width, height, max_color_idx = 0; | |
4772 | XImagePtr ximg; | |
4773 | Lisp_Object file, specified_file; | |
4774 | enum {PBM_MONO, PBM_GRAY, PBM_COLOR} type; | |
4775 | struct gcpro gcpro1; | |
4776 | unsigned char *contents = NULL; | |
4777 | unsigned char *end, *p; | |
4778 | int size; | |
4779 | ||
4780 | specified_file = image_spec_value (img->spec, QCfile, NULL); | |
4781 | file = Qnil; | |
4782 | GCPRO1 (file); | |
4783 | ||
4784 | if (STRINGP (specified_file)) | |
4785 | { | |
4786 | file = x_find_image_file (specified_file); | |
4787 | if (!STRINGP (file)) | |
4788 | { | |
4789 | image_error ("Cannot find image file `%s'", specified_file, Qnil); | |
4790 | UNGCPRO; | |
4791 | return 0; | |
4792 | } | |
4793 | ||
4794 | contents = slurp_file (SDATA (file), &size); | |
4795 | if (contents == NULL) | |
4796 | { | |
4797 | image_error ("Error reading `%s'", file, Qnil); | |
4798 | UNGCPRO; | |
4799 | return 0; | |
4800 | } | |
4801 | ||
4802 | p = contents; | |
4803 | end = contents + size; | |
4804 | } | |
4805 | else | |
4806 | { | |
4807 | Lisp_Object data; | |
4808 | data = image_spec_value (img->spec, QCdata, NULL); | |
4809 | p = SDATA (data); | |
4810 | end = p + SBYTES (data); | |
4811 | } | |
4812 | ||
4813 | /* Check magic number. */ | |
4814 | if (end - p < 2 || *p++ != 'P') | |
4815 | { | |
4816 | image_error ("Not a PBM image: `%s'", img->spec, Qnil); | |
4817 | error: | |
4818 | xfree (contents); | |
4819 | UNGCPRO; | |
4820 | return 0; | |
4821 | } | |
4822 | ||
4823 | switch (*p++) | |
4824 | { | |
4825 | case '1': | |
4826 | raw_p = 0, type = PBM_MONO; | |
4827 | break; | |
4828 | ||
4829 | case '2': | |
4830 | raw_p = 0, type = PBM_GRAY; | |
4831 | break; | |
4832 | ||
4833 | case '3': | |
4834 | raw_p = 0, type = PBM_COLOR; | |
4835 | break; | |
4836 | ||
4837 | case '4': | |
4838 | raw_p = 1, type = PBM_MONO; | |
4839 | break; | |
4840 | ||
4841 | case '5': | |
4842 | raw_p = 1, type = PBM_GRAY; | |
4843 | break; | |
4844 | ||
4845 | case '6': | |
4846 | raw_p = 1, type = PBM_COLOR; | |
4847 | break; | |
4848 | ||
4849 | default: | |
4850 | image_error ("Not a PBM image: `%s'", img->spec, Qnil); | |
4851 | goto error; | |
4852 | } | |
4853 | ||
4854 | /* Read width, height, maximum color-component. Characters | |
4855 | starting with `#' up to the end of a line are ignored. */ | |
4856 | width = pbm_scan_number (&p, end); | |
4857 | height = pbm_scan_number (&p, end); | |
4858 | ||
4859 | if (type != PBM_MONO) | |
4860 | { | |
4861 | max_color_idx = pbm_scan_number (&p, end); | |
4862 | if (raw_p && max_color_idx > 255) | |
4863 | max_color_idx = 255; | |
4864 | } | |
4865 | ||
4866 | if (width < 0 | |
4867 | || height < 0 | |
4868 | || (type != PBM_MONO && max_color_idx < 0)) | |
4869 | goto error; | |
4870 | ||
4871 | if (!x_create_x_image_and_pixmap (f, width, height, 0, | |
4872 | &ximg, &img->pixmap)) | |
4873 | goto error; | |
4874 | ||
4875 | /* Initialize the color hash table. */ | |
4876 | init_color_table (); | |
4877 | ||
4878 | if (type == PBM_MONO) | |
4879 | { | |
4880 | int c = 0, g; | |
4881 | struct image_keyword fmt[PBM_LAST]; | |
4882 | unsigned long fg = FRAME_FOREGROUND_PIXEL (f); | |
4883 | unsigned long bg = FRAME_BACKGROUND_PIXEL (f); | |
4884 | ||
4885 | /* Parse the image specification. */ | |
4886 | bcopy (pbm_format, fmt, sizeof fmt); | |
4887 | parse_image_spec (img->spec, fmt, PBM_LAST, Qpbm); | |
4888 | ||
4889 | /* Get foreground and background colors, maybe allocate colors. */ | |
4890 | if (fmt[PBM_FOREGROUND].count | |
4891 | && STRINGP (fmt[PBM_FOREGROUND].value)) | |
4892 | fg = x_alloc_image_color (f, img, fmt[PBM_FOREGROUND].value, fg); | |
4893 | if (fmt[PBM_BACKGROUND].count | |
4894 | && STRINGP (fmt[PBM_BACKGROUND].value)) | |
4895 | { | |
4896 | bg = x_alloc_image_color (f, img, fmt[PBM_BACKGROUND].value, bg); | |
4897 | img->background = bg; | |
4898 | img->background_valid = 1; | |
4899 | } | |
4900 | ||
4901 | for (y = 0; y < height; ++y) | |
4902 | for (x = 0; x < width; ++x) | |
4903 | { | |
4904 | if (raw_p) | |
4905 | { | |
4906 | if ((x & 7) == 0) | |
4907 | c = *p++; | |
4908 | g = c & 0x80; | |
4909 | c <<= 1; | |
4910 | } | |
4911 | else | |
4912 | g = pbm_scan_number (&p, end); | |
4913 | ||
4914 | XPutPixel (ximg, x, y, g ? fg : bg); | |
4915 | } | |
4916 | } | |
4917 | else | |
4918 | { | |
4919 | for (y = 0; y < height; ++y) | |
4920 | for (x = 0; x < width; ++x) | |
4921 | { | |
4922 | int r, g, b; | |
4923 | ||
4924 | if (type == PBM_GRAY) | |
4925 | r = g = b = raw_p ? *p++ : pbm_scan_number (&p, end); | |
4926 | else if (raw_p) | |
4927 | { | |
4928 | r = *p++; | |
4929 | g = *p++; | |
4930 | b = *p++; | |
4931 | } | |
4932 | else | |
4933 | { | |
4934 | r = pbm_scan_number (&p, end); | |
4935 | g = pbm_scan_number (&p, end); | |
4936 | b = pbm_scan_number (&p, end); | |
4937 | } | |
4938 | ||
4939 | if (r < 0 || g < 0 || b < 0) | |
4940 | { | |
4941 | x_destroy_x_image (ximg); | |
4942 | image_error ("Invalid pixel value in image `%s'", | |
4943 | img->spec, Qnil); | |
4944 | goto error; | |
4945 | } | |
4946 | ||
4947 | /* RGB values are now in the range 0..max_color_idx. | |
4948 | Scale this to the range 0..0xffff supported by X. */ | |
4949 | r = (double) r * 65535 / max_color_idx; | |
4950 | g = (double) g * 65535 / max_color_idx; | |
4951 | b = (double) b * 65535 / max_color_idx; | |
4952 | XPutPixel (ximg, x, y, lookup_rgb_color (f, r, g, b)); | |
4953 | } | |
4954 | } | |
4955 | ||
4956 | #ifdef COLOR_TABLE_SUPPORT | |
4957 | /* Store in IMG->colors the colors allocated for the image, and | |
4958 | free the color table. */ | |
4959 | img->colors = colors_in_color_table (&img->ncolors); | |
4960 | free_color_table (); | |
4961 | #endif /* COLOR_TABLE_SUPPORT */ | |
4962 | ||
4963 | img->width = width; | |
4964 | img->height = height; | |
4965 | ||
4966 | /* Maybe fill in the background field while we have ximg handy. */ | |
4967 | ||
4968 | if (NILP (image_spec_value (img->spec, QCbackground, NULL))) | |
4969 | IMAGE_BACKGROUND (img, f, ximg); | |
4970 | ||
4971 | /* Put the image into a pixmap. */ | |
4972 | x_put_x_image (f, ximg, img->pixmap, width, height); | |
4973 | x_destroy_x_image (ximg); | |
4974 | ||
4975 | /* X and W32 versions did it here, MAC version above. ++kfs | |
1f026899 | 4976 | img->width = width; |
4ef0d4d0 KS |
4977 | img->height = height; */ |
4978 | ||
4979 | UNGCPRO; | |
4980 | xfree (contents); | |
4981 | return 1; | |
4982 | } | |
4983 | ||
4984 | \f | |
4985 | /*********************************************************************** | |
4986 | PNG | |
4987 | ***********************************************************************/ | |
4988 | ||
4989 | #if defined (HAVE_PNG) || defined (MAC_OS) | |
4990 | ||
4991 | /* Function prototypes. */ | |
4992 | ||
4993 | static int png_image_p P_ ((Lisp_Object object)); | |
4994 | static int png_load P_ ((struct frame *f, struct image *img)); | |
4995 | ||
4996 | /* The symbol `png' identifying images of this type. */ | |
4997 | ||
4998 | Lisp_Object Qpng; | |
4999 | ||
5000 | /* Indices of image specification fields in png_format, below. */ | |
5001 | ||
5002 | enum png_keyword_index | |
5003 | { | |
5004 | PNG_TYPE, | |
5005 | PNG_DATA, | |
5006 | PNG_FILE, | |
5007 | PNG_ASCENT, | |
5008 | PNG_MARGIN, | |
5009 | PNG_RELIEF, | |
5010 | PNG_ALGORITHM, | |
5011 | PNG_HEURISTIC_MASK, | |
5012 | PNG_MASK, | |
5013 | PNG_BACKGROUND, | |
5014 | PNG_LAST | |
5015 | }; | |
5016 | ||
5017 | /* Vector of image_keyword structures describing the format | |
5018 | of valid user-defined image specifications. */ | |
5019 | ||
5020 | static struct image_keyword png_format[PNG_LAST] = | |
5021 | { | |
5022 | {":type", IMAGE_SYMBOL_VALUE, 1}, | |
5023 | {":data", IMAGE_STRING_VALUE, 0}, | |
5024 | {":file", IMAGE_STRING_VALUE, 0}, | |
5025 | {":ascent", IMAGE_ASCENT_VALUE, 0}, | |
5026 | {":margin", IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR, 0}, | |
5027 | {":relief", IMAGE_INTEGER_VALUE, 0}, | |
5028 | {":conversion", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, | |
5029 | {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, | |
5030 | {":mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, | |
5031 | {":background", IMAGE_STRING_OR_NIL_VALUE, 0} | |
5032 | }; | |
5033 | ||
5034 | /* Structure describing the image type `png'. */ | |
5035 | ||
5036 | static struct image_type png_type = | |
5037 | { | |
5038 | &Qpng, | |
5039 | png_image_p, | |
5040 | png_load, | |
5041 | x_clear_image, | |
5042 | NULL | |
5043 | }; | |
5044 | ||
5045 | /* Return non-zero if OBJECT is a valid PNG image specification. */ | |
5046 | ||
5047 | static int | |
5048 | png_image_p (object) | |
5049 | Lisp_Object object; | |
5050 | { | |
5051 | struct image_keyword fmt[PNG_LAST]; | |
5052 | bcopy (png_format, fmt, sizeof fmt); | |
5053 | ||
5054 | if (!parse_image_spec (object, fmt, PNG_LAST, Qpng)) | |
5055 | return 0; | |
5056 | ||
5057 | /* Must specify either the :data or :file keyword. */ | |
5058 | return fmt[PNG_FILE].count + fmt[PNG_DATA].count == 1; | |
5059 | } | |
5060 | ||
5061 | #endif /* HAVE_PNG || MAC_OS */ | |
5062 | ||
5063 | ||
5064 | #ifdef HAVE_PNG | |
5065 | ||
5066 | #if defined HAVE_LIBPNG_PNG_H | |
5067 | # include <libpng/png.h> | |
5068 | #else | |
5069 | # include <png.h> | |
5070 | #endif | |
5071 | ||
5072 | #ifdef HAVE_NTGUI | |
5073 | /* PNG library details. */ | |
5074 | ||
5075 | DEF_IMGLIB_FN (png_get_io_ptr); | |
5076 | DEF_IMGLIB_FN (png_check_sig); | |
5077 | DEF_IMGLIB_FN (png_create_read_struct); | |
5078 | DEF_IMGLIB_FN (png_create_info_struct); | |
5079 | DEF_IMGLIB_FN (png_destroy_read_struct); | |
5080 | DEF_IMGLIB_FN (png_set_read_fn); | |
5081 | DEF_IMGLIB_FN (png_init_io); | |
5082 | DEF_IMGLIB_FN (png_set_sig_bytes); | |
5083 | DEF_IMGLIB_FN (png_read_info); | |
5084 | DEF_IMGLIB_FN (png_get_IHDR); | |
5085 | DEF_IMGLIB_FN (png_get_valid); | |
5086 | DEF_IMGLIB_FN (png_set_strip_16); | |
5087 | DEF_IMGLIB_FN (png_set_expand); | |
5088 | DEF_IMGLIB_FN (png_set_gray_to_rgb); | |
5089 | DEF_IMGLIB_FN (png_set_background); | |
5090 | DEF_IMGLIB_FN (png_get_bKGD); | |
5091 | DEF_IMGLIB_FN (png_read_update_info); | |
5092 | DEF_IMGLIB_FN (png_get_channels); | |
5093 | DEF_IMGLIB_FN (png_get_rowbytes); | |
5094 | DEF_IMGLIB_FN (png_read_image); | |
5095 | DEF_IMGLIB_FN (png_read_end); | |
5096 | DEF_IMGLIB_FN (png_error); | |
5097 | ||
5098 | static int | |
5099 | init_png_functions (void) | |
5100 | { | |
5101 | HMODULE library; | |
5102 | ||
5103 | /* Ensure zlib is loaded. Try debug version first. */ | |
5104 | if (!LoadLibrary ("zlibd.dll") | |
5105 | && !LoadLibrary ("zlib.dll")) | |
5106 | return 0; | |
5107 | ||
5108 | /* Try loading libpng under probable names. */ | |
5109 | if (!(library = LoadLibrary ("libpng13d.dll")) | |
5110 | && !(library = LoadLibrary ("libpng13.dll")) | |
5111 | && !(library = LoadLibrary ("libpng12d.dll")) | |
5112 | && !(library = LoadLibrary ("libpng12.dll")) | |
5113 | && !(library = LoadLibrary ("libpng.dll"))) | |
5114 | return 0; | |
5115 | ||
5116 | LOAD_IMGLIB_FN (library, png_get_io_ptr); | |
5117 | LOAD_IMGLIB_FN (library, png_check_sig); | |
5118 | LOAD_IMGLIB_FN (library, png_create_read_struct); | |
5119 | LOAD_IMGLIB_FN (library, png_create_info_struct); | |
5120 | LOAD_IMGLIB_FN (library, png_destroy_read_struct); | |
5121 | LOAD_IMGLIB_FN (library, png_set_read_fn); | |
5122 | LOAD_IMGLIB_FN (library, png_init_io); | |
5123 | LOAD_IMGLIB_FN (library, png_set_sig_bytes); | |
5124 | LOAD_IMGLIB_FN (library, png_read_info); | |
5125 | LOAD_IMGLIB_FN (library, png_get_IHDR); | |
5126 | LOAD_IMGLIB_FN (library, png_get_valid); | |
5127 | LOAD_IMGLIB_FN (library, png_set_strip_16); | |
5128 | LOAD_IMGLIB_FN (library, png_set_expand); | |
5129 | LOAD_IMGLIB_FN (library, png_set_gray_to_rgb); | |
5130 | LOAD_IMGLIB_FN (library, png_set_background); | |
5131 | LOAD_IMGLIB_FN (library, png_get_bKGD); | |
5132 | LOAD_IMGLIB_FN (library, png_read_update_info); | |
5133 | LOAD_IMGLIB_FN (library, png_get_channels); | |
5134 | LOAD_IMGLIB_FN (library, png_get_rowbytes); | |
5135 | LOAD_IMGLIB_FN (library, png_read_image); | |
5136 | LOAD_IMGLIB_FN (library, png_read_end); | |
5137 | LOAD_IMGLIB_FN (library, png_error); | |
5138 | return 1; | |
5139 | } | |
5140 | #else | |
5141 | ||
5142 | #define fn_png_get_io_ptr png_get_io_ptr | |
5143 | #define fn_png_check_sig png_check_sig | |
5144 | #define fn_png_create_read_struct png_create_read_struct | |
5145 | #define fn_png_create_info_struct png_create_info_struct | |
5146 | #define fn_png_destroy_read_struct png_destroy_read_struct | |
5147 | #define fn_png_set_read_fn png_set_read_fn | |
5148 | #define fn_png_init_io png_init_io | |
5149 | #define fn_png_set_sig_bytes png_set_sig_bytes | |
5150 | #define fn_png_read_info png_read_info | |
5151 | #define fn_png_get_IHDR png_get_IHDR | |
5152 | #define fn_png_get_valid png_get_valid | |
5153 | #define fn_png_set_strip_16 png_set_strip_16 | |
5154 | #define fn_png_set_expand png_set_expand | |
5155 | #define fn_png_set_gray_to_rgb png_set_gray_to_rgb | |
5156 | #define fn_png_set_background png_set_background | |
5157 | #define fn_png_get_bKGD png_get_bKGD | |
5158 | #define fn_png_read_update_info png_read_update_info | |
5159 | #define fn_png_get_channels png_get_channels | |
5160 | #define fn_png_get_rowbytes png_get_rowbytes | |
5161 | #define fn_png_read_image png_read_image | |
5162 | #define fn_png_read_end png_read_end | |
5163 | #define fn_png_error png_error | |
5164 | ||
5165 | #endif /* HAVE_NTGUI */ | |
5166 | ||
5167 | /* Error and warning handlers installed when the PNG library | |
5168 | is initialized. */ | |
5169 | ||
5170 | static void | |
5171 | my_png_error (png_ptr, msg) | |
5172 | png_struct *png_ptr; | |
5173 | char *msg; | |
5174 | { | |
5175 | xassert (png_ptr != NULL); | |
5176 | image_error ("PNG error: %s", build_string (msg), Qnil); | |
5177 | longjmp (png_ptr->jmpbuf, 1); | |
5178 | } | |
5179 | ||
5180 | ||
5181 | static void | |
5182 | my_png_warning (png_ptr, msg) | |
5183 | png_struct *png_ptr; | |
5184 | char *msg; | |
5185 | { | |
5186 | xassert (png_ptr != NULL); | |
5187 | image_error ("PNG warning: %s", build_string (msg), Qnil); | |
5188 | } | |
5189 | ||
5190 | /* Memory source for PNG decoding. */ | |
5191 | ||
5192 | struct png_memory_storage | |
5193 | { | |
5194 | unsigned char *bytes; /* The data */ | |
5195 | size_t len; /* How big is it? */ | |
5196 | int index; /* Where are we? */ | |
5197 | }; | |
5198 | ||
5199 | ||
5200 | /* Function set as reader function when reading PNG image from memory. | |
5201 | PNG_PTR is a pointer to the PNG control structure. Copy LENGTH | |
5202 | bytes from the input to DATA. */ | |
5203 | ||
5204 | static void | |
5205 | png_read_from_memory (png_ptr, data, length) | |
5206 | png_structp png_ptr; | |
5207 | png_bytep data; | |
5208 | png_size_t length; | |
5209 | { | |
5210 | struct png_memory_storage *tbr | |
5211 | = (struct png_memory_storage *) fn_png_get_io_ptr (png_ptr); | |
5212 | ||
5213 | if (length > tbr->len - tbr->index) | |
5214 | fn_png_error (png_ptr, "Read error"); | |
5215 | ||
5216 | bcopy (tbr->bytes + tbr->index, data, length); | |
5217 | tbr->index = tbr->index + length; | |
5218 | } | |
5219 | ||
5220 | /* Load PNG image IMG for use on frame F. Value is non-zero if | |
5221 | successful. */ | |
5222 | ||
5223 | static int | |
5224 | png_load (f, img) | |
5225 | struct frame *f; | |
5226 | struct image *img; | |
5227 | { | |
5228 | Lisp_Object file, specified_file; | |
5229 | Lisp_Object specified_data; | |
5230 | int x, y, i; | |
5231 | XImagePtr ximg, mask_img = NULL; | |
5232 | struct gcpro gcpro1; | |
5233 | png_struct *png_ptr = NULL; | |
5234 | png_info *info_ptr = NULL, *end_info = NULL; | |
5235 | FILE *volatile fp = NULL; | |
5236 | png_byte sig[8]; | |
5237 | png_byte * volatile pixels = NULL; | |
5238 | png_byte ** volatile rows = NULL; | |
5239 | png_uint_32 width, height; | |
5240 | int bit_depth, color_type, interlace_type; | |
5241 | png_byte channels; | |
5242 | png_uint_32 row_bytes; | |
5243 | int transparent_p; | |
5244 | double screen_gamma; | |
5245 | struct png_memory_storage tbr; /* Data to be read */ | |
5246 | ||
5247 | /* Find out what file to load. */ | |
5248 | specified_file = image_spec_value (img->spec, QCfile, NULL); | |
5249 | specified_data = image_spec_value (img->spec, QCdata, NULL); | |
5250 | file = Qnil; | |
5251 | GCPRO1 (file); | |
5252 | ||
5253 | if (NILP (specified_data)) | |
5254 | { | |
5255 | file = x_find_image_file (specified_file); | |
5256 | if (!STRINGP (file)) | |
5257 | { | |
5258 | image_error ("Cannot find image file `%s'", specified_file, Qnil); | |
5259 | UNGCPRO; | |
5260 | return 0; | |
5261 | } | |
5262 | ||
5263 | /* Open the image file. */ | |
5264 | fp = fopen (SDATA (file), "rb"); | |
5265 | if (!fp) | |
5266 | { | |
5267 | image_error ("Cannot open image file `%s'", file, Qnil); | |
5268 | UNGCPRO; | |
5269 | fclose (fp); | |
5270 | return 0; | |
5271 | } | |
5272 | ||
5273 | /* Check PNG signature. */ | |
5274 | if (fread (sig, 1, sizeof sig, fp) != sizeof sig | |
5275 | || !fn_png_check_sig (sig, sizeof sig)) | |
5276 | { | |
5277 | image_error ("Not a PNG file: `%s'", file, Qnil); | |
5278 | UNGCPRO; | |
5279 | fclose (fp); | |
5280 | return 0; | |
5281 | } | |
5282 | } | |
5283 | else | |
5284 | { | |
5285 | /* Read from memory. */ | |
5286 | tbr.bytes = SDATA (specified_data); | |
5287 | tbr.len = SBYTES (specified_data); | |
5288 | tbr.index = 0; | |
5289 | ||
5290 | /* Check PNG signature. */ | |
5291 | if (tbr.len < sizeof sig | |
5292 | || !fn_png_check_sig (tbr.bytes, sizeof sig)) | |
5293 | { | |
5294 | image_error ("Not a PNG image: `%s'", img->spec, Qnil); | |
5295 | UNGCPRO; | |
5296 | return 0; | |
5297 | } | |
5298 | ||
5299 | /* Need to skip past the signature. */ | |
5300 | tbr.bytes += sizeof (sig); | |
5301 | } | |
5302 | ||
5303 | /* Initialize read and info structs for PNG lib. */ | |
5304 | png_ptr = fn_png_create_read_struct (PNG_LIBPNG_VER_STRING, NULL, | |
5305 | my_png_error, my_png_warning); | |
5306 | if (!png_ptr) | |
5307 | { | |
5308 | if (fp) fclose (fp); | |
5309 | UNGCPRO; | |
5310 | return 0; | |
5311 | } | |
5312 | ||
5313 | info_ptr = fn_png_create_info_struct (png_ptr); | |
5314 | if (!info_ptr) | |
5315 | { | |
5316 | fn_png_destroy_read_struct (&png_ptr, NULL, NULL); | |
5317 | if (fp) fclose (fp); | |
5318 | UNGCPRO; | |
5319 | return 0; | |
5320 | } | |
5321 | ||
5322 | end_info = fn_png_create_info_struct (png_ptr); | |
5323 | if (!end_info) | |
5324 | { | |
5325 | fn_png_destroy_read_struct (&png_ptr, &info_ptr, NULL); | |
5326 | if (fp) fclose (fp); | |
5327 | UNGCPRO; | |
5328 | return 0; | |
5329 | } | |
5330 | ||
5331 | /* Set error jump-back. We come back here when the PNG library | |
5332 | detects an error. */ | |
5333 | if (setjmp (png_ptr->jmpbuf)) | |
5334 | { | |
5335 | error: | |
5336 | if (png_ptr) | |
5337 | fn_png_destroy_read_struct (&png_ptr, &info_ptr, &end_info); | |
5338 | xfree (pixels); | |
5339 | xfree (rows); | |
5340 | if (fp) fclose (fp); | |
5341 | UNGCPRO; | |
5342 | return 0; | |
5343 | } | |
5344 | ||
5345 | /* Read image info. */ | |
5346 | if (!NILP (specified_data)) | |
5347 | fn_png_set_read_fn (png_ptr, (void *) &tbr, png_read_from_memory); | |
5348 | else | |
5349 | fn_png_init_io (png_ptr, fp); | |
5350 | ||
5351 | fn_png_set_sig_bytes (png_ptr, sizeof sig); | |
5352 | fn_png_read_info (png_ptr, info_ptr); | |
5353 | fn_png_get_IHDR (png_ptr, info_ptr, &width, &height, &bit_depth, &color_type, | |
5354 | &interlace_type, NULL, NULL); | |
5355 | ||
5356 | /* If image contains simply transparency data, we prefer to | |
5357 | construct a clipping mask. */ | |
5358 | if (fn_png_get_valid (png_ptr, info_ptr, PNG_INFO_tRNS)) | |
5359 | transparent_p = 1; | |
5360 | else | |
5361 | transparent_p = 0; | |
5362 | ||
5363 | /* This function is easier to write if we only have to handle | |
5364 | one data format: RGB or RGBA with 8 bits per channel. Let's | |
5365 | transform other formats into that format. */ | |
5366 | ||
5367 | /* Strip more than 8 bits per channel. */ | |
5368 | if (bit_depth == 16) | |
5369 | fn_png_set_strip_16 (png_ptr); | |
5370 | ||
5371 | /* Expand data to 24 bit RGB, or 8 bit grayscale, with alpha channel | |
5372 | if available. */ | |
5373 | fn_png_set_expand (png_ptr); | |
5374 | ||
5375 | /* Convert grayscale images to RGB. */ | |
5376 | if (color_type == PNG_COLOR_TYPE_GRAY | |
5377 | || color_type == PNG_COLOR_TYPE_GRAY_ALPHA) | |
5378 | fn_png_set_gray_to_rgb (png_ptr); | |
5379 | ||
5380 | screen_gamma = (f->gamma ? 1 / f->gamma / 0.45455 : 2.2); | |
5381 | ||
5382 | #if 0 /* Avoid double gamma correction for PNG images. */ | |
5383 | { /* Tell the PNG lib to handle gamma correction for us. */ | |
5384 | int intent; | |
5385 | double image_gamma; | |
5386 | #if defined(PNG_READ_sRGB_SUPPORTED) || defined(PNG_WRITE_sRGB_SUPPORTED) | |
5387 | if (png_get_sRGB (png_ptr, info_ptr, &intent)) | |
5388 | /* The libpng documentation says this is right in this case. */ | |
5389 | png_set_gamma (png_ptr, screen_gamma, 0.45455); | |
5390 | else | |
5391 | #endif | |
5392 | if (png_get_gAMA (png_ptr, info_ptr, &image_gamma)) | |
5393 | /* Image contains gamma information. */ | |
5394 | png_set_gamma (png_ptr, screen_gamma, image_gamma); | |
5395 | else | |
5396 | /* Use the standard default for the image gamma. */ | |
5397 | png_set_gamma (png_ptr, screen_gamma, 0.45455); | |
5398 | } | |
5399 | #endif /* if 0 */ | |
5400 | ||
5401 | /* Handle alpha channel by combining the image with a background | |
5402 | color. Do this only if a real alpha channel is supplied. For | |
5403 | simple transparency, we prefer a clipping mask. */ | |
5404 | if (!transparent_p) | |
5405 | { | |
5406 | png_color_16 *image_bg; | |
5407 | Lisp_Object specified_bg | |
5408 | = image_spec_value (img->spec, QCbackground, NULL); | |
5409 | ||
5410 | if (STRINGP (specified_bg)) | |
5411 | /* The user specified `:background', use that. */ | |
5412 | { | |
5413 | /* W32 version incorrectly used COLORREF here!! ++kfs */ | |
5414 | XColor color; | |
5415 | if (x_defined_color (f, SDATA (specified_bg), &color, 0)) | |
5416 | { | |
5417 | png_color_16 user_bg; | |
5418 | ||
5419 | bzero (&user_bg, sizeof user_bg); | |
1f026899 KS |
5420 | user_bg.red = color.red >> 8; |
5421 | user_bg.green = color.green >> 8; | |
5422 | user_bg.blue = color.blue >> 8; | |
4ef0d4d0 KS |
5423 | |
5424 | fn_png_set_background (png_ptr, &user_bg, | |
5425 | PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0); | |
5426 | } | |
5427 | } | |
5428 | else if (fn_png_get_bKGD (png_ptr, info_ptr, &image_bg)) | |
5429 | /* Image contains a background color with which to | |
5430 | combine the image. */ | |
5431 | fn_png_set_background (png_ptr, image_bg, | |
5432 | PNG_BACKGROUND_GAMMA_FILE, 1, 1.0); | |
5433 | else | |
5434 | { | |
5435 | /* Image does not contain a background color with which | |
5436 | to combine the image data via an alpha channel. Use | |
5437 | the frame's background instead. */ | |
5438 | #ifdef HAVE_X_WINDOWS | |
5439 | XColor color; | |
5440 | png_color_16 frame_background; | |
5441 | ||
5442 | color.pixel = FRAME_BACKGROUND_PIXEL (f); | |
5443 | x_query_color (f, &color); | |
5444 | ||
5445 | bzero (&frame_background, sizeof frame_background); | |
1f026899 KS |
5446 | frame_background.red = color.red >> 8; |
5447 | frame_background.green = color.green >> 8; | |
5448 | frame_background.blue = color.blue >> 8; | |
4ef0d4d0 KS |
5449 | #endif /* HAVE_X_WINDOWS */ |
5450 | ||
5451 | #ifdef HAVE_NTGUI | |
5452 | COLORREF color; | |
5453 | png_color_16 frame_background; | |
5454 | color = FRAME_BACKGROUND_PIXEL (f); | |
5455 | #if 0 /* W32 TODO : Colormap support. */ | |
5456 | x_query_color (f, &color); | |
5457 | #endif | |
5458 | bzero (&frame_background, sizeof frame_background); | |
1f026899 KS |
5459 | frame_background.red = GetRValue (color); |
5460 | frame_background.green = GetGValue (color); | |
5461 | frame_background.blue = GetBValue (color); | |
4ef0d4d0 KS |
5462 | #endif /* HAVE_NTGUI */ |
5463 | ||
5464 | #ifdef MAC_OS | |
5465 | unsigned long color; | |
5466 | png_color_16 frame_background; | |
5467 | color = FRAME_BACKGROUND_PIXEL (f); | |
5468 | #if 0 /* MAC/W32 TODO : Colormap support. */ | |
5469 | x_query_color (f, &color); | |
5470 | #endif | |
5471 | bzero (&frame_background, sizeof frame_background); | |
5472 | frame_background.red = RED_FROM_ULONG (color); | |
5473 | frame_background.green = GREEN_FROM_ULONG (color); | |
5474 | frame_background.blue = BLUE_FROM_ULONG (color); | |
5475 | #endif /* MAC_OS */ | |
5476 | ||
5477 | fn_png_set_background (png_ptr, &frame_background, | |
5478 | PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0); | |
5479 | } | |
5480 | } | |
5481 | ||
5482 | /* Update info structure. */ | |
5483 | fn_png_read_update_info (png_ptr, info_ptr); | |
5484 | ||
5485 | /* Get number of channels. Valid values are 1 for grayscale images | |
5486 | and images with a palette, 2 for grayscale images with transparency | |
5487 | information (alpha channel), 3 for RGB images, and 4 for RGB | |
5488 | images with alpha channel, i.e. RGBA. If conversions above were | |
5489 | sufficient we should only have 3 or 4 channels here. */ | |
5490 | channels = fn_png_get_channels (png_ptr, info_ptr); | |
5491 | xassert (channels == 3 || channels == 4); | |
5492 | ||
5493 | /* Number of bytes needed for one row of the image. */ | |
5494 | row_bytes = fn_png_get_rowbytes (png_ptr, info_ptr); | |
5495 | ||
5496 | /* Allocate memory for the image. */ | |
5497 | pixels = (png_byte *) xmalloc (row_bytes * height * sizeof *pixels); | |
5498 | rows = (png_byte **) xmalloc (height * sizeof *rows); | |
5499 | for (i = 0; i < height; ++i) | |
5500 | rows[i] = pixels + i * row_bytes; | |
5501 | ||
5502 | /* Read the entire image. */ | |
5503 | fn_png_read_image (png_ptr, rows); | |
5504 | fn_png_read_end (png_ptr, info_ptr); | |
5505 | if (fp) | |
5506 | { | |
5507 | fclose (fp); | |
5508 | fp = NULL; | |
5509 | } | |
5510 | ||
5511 | /* Create the X image and pixmap. */ | |
5512 | if (!x_create_x_image_and_pixmap (f, width, height, 0, &ximg, | |
5513 | &img->pixmap)) | |
5514 | goto error; | |
5515 | ||
5516 | /* Create an image and pixmap serving as mask if the PNG image | |
5517 | contains an alpha channel. */ | |
5518 | if (channels == 4 | |
5519 | && !transparent_p | |
5520 | && !x_create_x_image_and_pixmap (f, width, height, 1, | |
5521 | &mask_img, &img->mask)) | |
5522 | { | |
5523 | x_destroy_x_image (ximg); | |
5524 | Free_Pixmap (FRAME_X_DISPLAY (f), img->pixmap); | |
5525 | img->pixmap = NO_PIXMAP; | |
5526 | goto error; | |
5527 | } | |
5528 | ||
5529 | /* Fill the X image and mask from PNG data. */ | |
5530 | init_color_table (); | |
5531 | ||
5532 | for (y = 0; y < height; ++y) | |
5533 | { | |
5534 | png_byte *p = rows[y]; | |
5535 | ||
5536 | for (x = 0; x < width; ++x) | |
5537 | { | |
5538 | unsigned r, g, b; | |
5539 | ||
5540 | r = *p++ << 8; | |
5541 | g = *p++ << 8; | |
5542 | b = *p++ << 8; | |
5543 | XPutPixel (ximg, x, y, lookup_rgb_color (f, r, g, b)); | |
5544 | /* An alpha channel, aka mask channel, associates variable | |
5545 | transparency with an image. Where other image formats | |
5546 | support binary transparency---fully transparent or fully | |
5547 | opaque---PNG allows up to 254 levels of partial transparency. | |
5548 | The PNG library implements partial transparency by combining | |
5549 | the image with a specified background color. | |
5550 | ||
5551 | I'm not sure how to handle this here nicely: because the | |
5552 | background on which the image is displayed may change, for | |
5553 | real alpha channel support, it would be necessary to create | |
5554 | a new image for each possible background. | |
5555 | ||
5556 | What I'm doing now is that a mask is created if we have | |
5557 | boolean transparency information. Otherwise I'm using | |
5558 | the frame's background color to combine the image with. */ | |
5559 | ||
5560 | if (channels == 4) | |
5561 | { | |
5562 | if (mask_img) | |
5563 | XPutPixel (mask_img, x, y, *p > 0 ? PIX_MASK_DRAW (f) : PIX_MASK_RETAIN (f)); | |
5564 | ++p; | |
5565 | } | |
5566 | } | |
5567 | } | |
5568 | ||
5569 | if (NILP (image_spec_value (img->spec, QCbackground, NULL))) | |
5570 | /* Set IMG's background color from the PNG image, unless the user | |
5571 | overrode it. */ | |
5572 | { | |
5573 | png_color_16 *bg; | |
5574 | if (fn_png_get_bKGD (png_ptr, info_ptr, &bg)) | |
5575 | { | |
5576 | img->background = lookup_rgb_color (f, bg->red, bg->green, bg->blue); | |
5577 | img->background_valid = 1; | |
5578 | } | |
5579 | } | |
5580 | ||
5581 | #ifdef COLOR_TABLE_SUPPORT | |
5582 | /* Remember colors allocated for this image. */ | |
5583 | img->colors = colors_in_color_table (&img->ncolors); | |
5584 | free_color_table (); | |
5585 | #endif /* COLOR_TABLE_SUPPORT */ | |
5586 | ||
5587 | /* Clean up. */ | |
5588 | fn_png_destroy_read_struct (&png_ptr, &info_ptr, &end_info); | |
5589 | xfree (rows); | |
5590 | xfree (pixels); | |
5591 | ||
5592 | img->width = width; | |
5593 | img->height = height; | |
5594 | ||
5595 | /* Maybe fill in the background field while we have ximg handy. */ | |
5596 | IMAGE_BACKGROUND (img, f, ximg); | |
5597 | ||
5598 | /* Put the image into the pixmap, then free the X image and its buffer. */ | |
5599 | x_put_x_image (f, ximg, img->pixmap, width, height); | |
5600 | x_destroy_x_image (ximg); | |
5601 | ||
5602 | /* Same for the mask. */ | |
5603 | if (mask_img) | |
5604 | { | |
5605 | /* Fill in the background_transparent field while we have the mask | |
5606 | handy. */ | |
5607 | image_background_transparent (img, f, mask_img); | |
5608 | ||
5609 | x_put_x_image (f, mask_img, img->mask, img->width, img->height); | |
5610 | x_destroy_x_image (mask_img); | |
5611 | } | |
5612 | ||
5613 | UNGCPRO; | |
5614 | return 1; | |
5615 | } | |
5616 | ||
5617 | #else /* HAVE_PNG */ | |
5618 | ||
5619 | #ifdef MAC_OS | |
5620 | static int | |
5621 | png_load (f, img) | |
5622 | struct frame *f; | |
5623 | struct image *img; | |
5624 | { | |
5625 | #ifdef MAC_OSX | |
5626 | if (MyCGImageCreateWithPNGDataProvider) | |
5627 | return image_load_quartz2d (f, img, 1); | |
5628 | else | |
5629 | #endif | |
5630 | return image_load_quicktime (f, img, kQTFileTypePNG); | |
5631 | } | |
5632 | #endif /* MAC_OS */ | |
5633 | ||
5634 | #endif /* !HAVE_PNG */ | |
5635 | ||
5636 | ||
5637 | \f | |
5638 | /*********************************************************************** | |
5639 | JPEG | |
5640 | ***********************************************************************/ | |
5641 | ||
5642 | #if defined (HAVE_JPEG) || defined (MAC_OS) | |
5643 | ||
5644 | static int jpeg_image_p P_ ((Lisp_Object object)); | |
5645 | static int jpeg_load P_ ((struct frame *f, struct image *img)); | |
5646 | ||
5647 | /* The symbol `jpeg' identifying images of this type. */ | |
5648 | ||
5649 | Lisp_Object Qjpeg; | |
5650 | ||
5651 | /* Indices of image specification fields in gs_format, below. */ | |
5652 | ||
5653 | enum jpeg_keyword_index | |
5654 | { | |
5655 | JPEG_TYPE, | |
5656 | JPEG_DATA, | |
5657 | JPEG_FILE, | |
5658 | JPEG_ASCENT, | |
5659 | JPEG_MARGIN, | |
5660 | JPEG_RELIEF, | |
5661 | JPEG_ALGORITHM, | |
5662 | JPEG_HEURISTIC_MASK, | |
5663 | JPEG_MASK, | |
5664 | JPEG_BACKGROUND, | |
5665 | JPEG_LAST | |
5666 | }; | |
5667 | ||
5668 | /* Vector of image_keyword structures describing the format | |
5669 | of valid user-defined image specifications. */ | |
5670 | ||
5671 | static struct image_keyword jpeg_format[JPEG_LAST] = | |
5672 | { | |
5673 | {":type", IMAGE_SYMBOL_VALUE, 1}, | |
5674 | {":data", IMAGE_STRING_VALUE, 0}, | |
5675 | {":file", IMAGE_STRING_VALUE, 0}, | |
5676 | {":ascent", IMAGE_ASCENT_VALUE, 0}, | |
5677 | {":margin", IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR, 0}, | |
5678 | {":relief", IMAGE_INTEGER_VALUE, 0}, | |
5679 | {":conversions", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, | |
5680 | {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, | |
5681 | {":mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, | |
5682 | {":background", IMAGE_STRING_OR_NIL_VALUE, 0} | |
5683 | }; | |
5684 | ||
5685 | /* Structure describing the image type `jpeg'. */ | |
5686 | ||
5687 | static struct image_type jpeg_type = | |
5688 | { | |
5689 | &Qjpeg, | |
5690 | jpeg_image_p, | |
5691 | jpeg_load, | |
5692 | x_clear_image, | |
5693 | NULL | |
5694 | }; | |
5695 | ||
5696 | /* Return non-zero if OBJECT is a valid JPEG image specification. */ | |
5697 | ||
5698 | static int | |
5699 | jpeg_image_p (object) | |
5700 | Lisp_Object object; | |
5701 | { | |
5702 | struct image_keyword fmt[JPEG_LAST]; | |
5703 | ||
5704 | bcopy (jpeg_format, fmt, sizeof fmt); | |
5705 | ||
5706 | if (!parse_image_spec (object, fmt, JPEG_LAST, Qjpeg)) | |
5707 | return 0; | |
5708 | ||
5709 | /* Must specify either the :data or :file keyword. */ | |
5710 | return fmt[JPEG_FILE].count + fmt[JPEG_DATA].count == 1; | |
5711 | } | |
5712 | ||
5713 | #endif /* HAVE_JPEG || MAC_OS */ | |
5714 | ||
5715 | #ifdef HAVE_JPEG | |
5716 | ||
5717 | /* Work around a warning about HAVE_STDLIB_H being redefined in | |
5718 | jconfig.h. */ | |
5719 | #ifdef HAVE_STDLIB_H | |
5720 | #define HAVE_STDLIB_H_1 | |
5721 | #undef HAVE_STDLIB_H | |
5722 | #endif /* HAVE_STLIB_H */ | |
5723 | ||
5724 | #include <jpeglib.h> | |
5725 | #include <jerror.h> | |
5726 | #include <setjmp.h> | |
5727 | ||
5728 | #ifdef HAVE_STLIB_H_1 | |
5729 | #define HAVE_STDLIB_H 1 | |
5730 | #endif | |
5731 | ||
5732 | #ifdef HAVE_NTGUI | |
5733 | ||
5734 | /* JPEG library details. */ | |
5735 | DEF_IMGLIB_FN (jpeg_CreateDecompress); | |
5736 | DEF_IMGLIB_FN (jpeg_start_decompress); | |
5737 | DEF_IMGLIB_FN (jpeg_finish_decompress); | |
5738 | DEF_IMGLIB_FN (jpeg_destroy_decompress); | |
5739 | DEF_IMGLIB_FN (jpeg_read_header); | |
5740 | DEF_IMGLIB_FN (jpeg_read_scanlines); | |
5741 | DEF_IMGLIB_FN (jpeg_stdio_src); | |
5742 | DEF_IMGLIB_FN (jpeg_std_error); | |
5743 | DEF_IMGLIB_FN (jpeg_resync_to_restart); | |
5744 | ||
5745 | static int | |
5746 | init_jpeg_functions (void) | |
5747 | { | |
5748 | HMODULE library; | |
5749 | ||
5750 | if (!(library = LoadLibrary ("libjpeg.dll")) | |
5751 | && !(library = LoadLibrary ("jpeg-62.dll")) | |
5752 | && !(library = LoadLibrary ("jpeg.dll"))) | |
5753 | return 0; | |
5754 | ||
5755 | LOAD_IMGLIB_FN (library, jpeg_finish_decompress); | |
5756 | LOAD_IMGLIB_FN (library, jpeg_read_scanlines); | |
5757 | LOAD_IMGLIB_FN (library, jpeg_start_decompress); | |
5758 | LOAD_IMGLIB_FN (library, jpeg_read_header); | |
5759 | LOAD_IMGLIB_FN (library, jpeg_stdio_src); | |
5760 | LOAD_IMGLIB_FN (library, jpeg_CreateDecompress); | |
5761 | LOAD_IMGLIB_FN (library, jpeg_destroy_decompress); | |
5762 | LOAD_IMGLIB_FN (library, jpeg_std_error); | |
5763 | LOAD_IMGLIB_FN (library, jpeg_resync_to_restart); | |
5764 | return 1; | |
5765 | } | |
5766 | ||
5767 | /* Wrapper since we can't directly assign the function pointer | |
5768 | to another function pointer that was declared more completely easily. */ | |
5769 | static boolean | |
5770 | jpeg_resync_to_restart_wrapper(cinfo, desired) | |
5771 | j_decompress_ptr cinfo; | |
5772 | int desired; | |
5773 | { | |
5774 | return fn_jpeg_resync_to_restart (cinfo, desired); | |
5775 | } | |
5776 | ||
5777 | #else | |
5778 | ||
5779 | #define fn_jpeg_CreateDecompress(a,b,c) jpeg_create_decompress(a) | |
5780 | #define fn_jpeg_start_decompress jpeg_start_decompress | |
5781 | #define fn_jpeg_finish_decompress jpeg_finish_decompress | |
5782 | #define fn_jpeg_destroy_decompress jpeg_destroy_decompress | |
5783 | #define fn_jpeg_read_header jpeg_read_header | |
5784 | #define fn_jpeg_read_scanlines jpeg_read_scanlines | |
5785 | #define fn_jpeg_stdio_src jpeg_stdio_src | |
5786 | #define fn_jpeg_std_error jpeg_std_error | |
5787 | #define jpeg_resync_to_restart_wrapper jpeg_resync_to_restart | |
5788 | ||
5789 | #endif /* HAVE_NTGUI */ | |
5790 | ||
5791 | struct my_jpeg_error_mgr | |
5792 | { | |
5793 | struct jpeg_error_mgr pub; | |
5794 | jmp_buf setjmp_buffer; | |
5795 | }; | |
5796 | ||
5797 | ||
5798 | static void | |
5799 | my_error_exit (cinfo) | |
5800 | j_common_ptr cinfo; | |
5801 | { | |
5802 | struct my_jpeg_error_mgr *mgr = (struct my_jpeg_error_mgr *) cinfo->err; | |
5803 | longjmp (mgr->setjmp_buffer, 1); | |
5804 | } | |
5805 | ||
5806 | ||
5807 | /* Init source method for JPEG data source manager. Called by | |
5808 | jpeg_read_header() before any data is actually read. See | |
5809 | libjpeg.doc from the JPEG lib distribution. */ | |
5810 | ||
5811 | static void | |
5812 | our_init_source (cinfo) | |
5813 | j_decompress_ptr cinfo; | |
5814 | { | |
5815 | } | |
5816 | ||
5817 | ||
5818 | /* Fill input buffer method for JPEG data source manager. Called | |
5819 | whenever more data is needed. We read the whole image in one step, | |
5820 | so this only adds a fake end of input marker at the end. */ | |
5821 | ||
5822 | static boolean | |
5823 | our_fill_input_buffer (cinfo) | |
5824 | j_decompress_ptr cinfo; | |
5825 | { | |
5826 | /* Insert a fake EOI marker. */ | |
5827 | struct jpeg_source_mgr *src = cinfo->src; | |
5828 | static JOCTET buffer[2]; | |
5829 | ||
5830 | buffer[0] = (JOCTET) 0xFF; | |
5831 | buffer[1] = (JOCTET) JPEG_EOI; | |
5832 | ||
5833 | src->next_input_byte = buffer; | |
5834 | src->bytes_in_buffer = 2; | |
5835 | return TRUE; | |
5836 | } | |
5837 | ||
5838 | ||
5839 | /* Method to skip over NUM_BYTES bytes in the image data. CINFO->src | |
5840 | is the JPEG data source manager. */ | |
5841 | ||
5842 | static void | |
5843 | our_skip_input_data (cinfo, num_bytes) | |
5844 | j_decompress_ptr cinfo; | |
5845 | long num_bytes; | |
5846 | { | |
5847 | struct jpeg_source_mgr *src = (struct jpeg_source_mgr *) cinfo->src; | |
5848 | ||
5849 | if (src) | |
5850 | { | |
5851 | if (num_bytes > src->bytes_in_buffer) | |
5852 | ERREXIT (cinfo, JERR_INPUT_EOF); | |
5853 | ||
5854 | src->bytes_in_buffer -= num_bytes; | |
5855 | src->next_input_byte += num_bytes; | |
5856 | } | |
5857 | } | |
5858 | ||
5859 | ||
5860 | /* Method to terminate data source. Called by | |
5861 | jpeg_finish_decompress() after all data has been processed. */ | |
5862 | ||
5863 | static void | |
5864 | our_term_source (cinfo) | |
5865 | j_decompress_ptr cinfo; | |
5866 | { | |
5867 | } | |
5868 | ||
5869 | ||
5870 | /* Set up the JPEG lib for reading an image from DATA which contains | |
5871 | LEN bytes. CINFO is the decompression info structure created for | |
5872 | reading the image. */ | |
5873 | ||
5874 | static void | |
5875 | jpeg_memory_src (cinfo, data, len) | |
5876 | j_decompress_ptr cinfo; | |
5877 | JOCTET *data; | |
5878 | unsigned int len; | |
5879 | { | |
5880 | struct jpeg_source_mgr *src; | |
5881 | ||
5882 | if (cinfo->src == NULL) | |
5883 | { | |
5884 | /* First time for this JPEG object? */ | |
5885 | cinfo->src = (struct jpeg_source_mgr *) | |
5886 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT, | |
5887 | sizeof (struct jpeg_source_mgr)); | |
5888 | src = (struct jpeg_source_mgr *) cinfo->src; | |
5889 | src->next_input_byte = data; | |
5890 | } | |
5891 | ||
5892 | src = (struct jpeg_source_mgr *) cinfo->src; | |
5893 | src->init_source = our_init_source; | |
5894 | src->fill_input_buffer = our_fill_input_buffer; | |
5895 | src->skip_input_data = our_skip_input_data; | |
5896 | src->resync_to_restart = jpeg_resync_to_restart_wrapper; /* Use default method. */ | |
5897 | src->term_source = our_term_source; | |
5898 | src->bytes_in_buffer = len; | |
5899 | src->next_input_byte = data; | |
5900 | } | |
5901 | ||
5902 | ||
5903 | /* Load image IMG for use on frame F. Patterned after example.c | |
5904 | from the JPEG lib. */ | |
5905 | ||
5906 | static int | |
5907 | jpeg_load (f, img) | |
5908 | struct frame *f; | |
5909 | struct image *img; | |
5910 | { | |
5911 | struct jpeg_decompress_struct cinfo; | |
5912 | struct my_jpeg_error_mgr mgr; | |
5913 | Lisp_Object file, specified_file; | |
5914 | Lisp_Object specified_data; | |
5915 | FILE * volatile fp = NULL; | |
5916 | JSAMPARRAY buffer; | |
5917 | int row_stride, x, y; | |
5918 | XImagePtr ximg = NULL; | |
5919 | int rc; | |
5920 | unsigned long *colors; | |
5921 | int width, height; | |
5922 | struct gcpro gcpro1; | |
5923 | ||
5924 | /* Open the JPEG file. */ | |
5925 | specified_file = image_spec_value (img->spec, QCfile, NULL); | |
5926 | specified_data = image_spec_value (img->spec, QCdata, NULL); | |
5927 | file = Qnil; | |
5928 | GCPRO1 (file); | |
5929 | ||
5930 | if (NILP (specified_data)) | |
5931 | { | |
5932 | file = x_find_image_file (specified_file); | |
5933 | if (!STRINGP (file)) | |
5934 | { | |
5935 | image_error ("Cannot find image file `%s'", specified_file, Qnil); | |
5936 | UNGCPRO; | |
5937 | return 0; | |
5938 | } | |
5939 | ||
5940 | fp = fopen (SDATA (file), "rb"); | |
5941 | if (fp == NULL) | |
5942 | { | |
5943 | image_error ("Cannot open `%s'", file, Qnil); | |
5944 | UNGCPRO; | |
5945 | return 0; | |
5946 | } | |
5947 | } | |
5948 | ||
5949 | /* Customize libjpeg's error handling to call my_error_exit when an | |
5950 | error is detected. This function will perform a longjmp. */ | |
5951 | cinfo.err = fn_jpeg_std_error (&mgr.pub); | |
5952 | mgr.pub.error_exit = my_error_exit; | |
5953 | ||
5954 | if ((rc = setjmp (mgr.setjmp_buffer)) != 0) | |
5955 | { | |
5956 | if (rc == 1) | |
5957 | { | |
5958 | /* Called from my_error_exit. Display a JPEG error. */ | |
5959 | char buffer[JMSG_LENGTH_MAX]; | |
5960 | cinfo.err->format_message ((j_common_ptr) &cinfo, buffer); | |
5961 | image_error ("Error reading JPEG image `%s': %s", img->spec, | |
5962 | build_string (buffer)); | |
5963 | } | |
5964 | ||
5965 | /* Close the input file and destroy the JPEG object. */ | |
5966 | if (fp) | |
5967 | fclose ((FILE *) fp); | |
5968 | fn_jpeg_destroy_decompress (&cinfo); | |
5969 | ||
5970 | /* If we already have an XImage, free that. */ | |
5971 | x_destroy_x_image (ximg); | |
5972 | ||
5973 | /* Free pixmap and colors. */ | |
5974 | x_clear_image (f, img); | |
5975 | ||
5976 | UNGCPRO; | |
5977 | return 0; | |
5978 | } | |
5979 | ||
5980 | /* Create the JPEG decompression object. Let it read from fp. | |
5981 | Read the JPEG image header. */ | |
5982 | fn_jpeg_CreateDecompress (&cinfo, JPEG_LIB_VERSION, sizeof (cinfo)); | |
5983 | ||
5984 | if (NILP (specified_data)) | |
5985 | fn_jpeg_stdio_src (&cinfo, (FILE *) fp); | |
5986 | else | |
5987 | jpeg_memory_src (&cinfo, SDATA (specified_data), | |
5988 | SBYTES (specified_data)); | |
5989 | ||
5990 | fn_jpeg_read_header (&cinfo, TRUE); | |
5991 | ||
5992 | /* Customize decompression so that color quantization will be used. | |
5993 | Start decompression. */ | |
5994 | cinfo.quantize_colors = TRUE; | |
5995 | fn_jpeg_start_decompress (&cinfo); | |
5996 | width = img->width = cinfo.output_width; | |
5997 | height = img->height = cinfo.output_height; | |
5998 | ||
5999 | /* Create X image and pixmap. */ | |
6000 | if (!x_create_x_image_and_pixmap (f, width, height, 0, &ximg, &img->pixmap)) | |
6001 | longjmp (mgr.setjmp_buffer, 2); | |
6002 | ||
6003 | /* Allocate colors. When color quantization is used, | |
6004 | cinfo.actual_number_of_colors has been set with the number of | |
6005 | colors generated, and cinfo.colormap is a two-dimensional array | |
6006 | of color indices in the range 0..cinfo.actual_number_of_colors. | |
6007 | No more than 255 colors will be generated. */ | |
6008 | { | |
6009 | int i, ir, ig, ib; | |
6010 | ||
6011 | if (cinfo.out_color_components > 2) | |
6012 | ir = 0, ig = 1, ib = 2; | |
6013 | else if (cinfo.out_color_components > 1) | |
6014 | ir = 0, ig = 1, ib = 0; | |
6015 | else | |
6016 | ir = 0, ig = 0, ib = 0; | |
6017 | ||
6018 | /* Use the color table mechanism because it handles colors that | |
6019 | cannot be allocated nicely. Such colors will be replaced with | |
6020 | a default color, and we don't have to care about which colors | |
6021 | can be freed safely, and which can't. */ | |
6022 | init_color_table (); | |
6023 | colors = (unsigned long *) alloca (cinfo.actual_number_of_colors | |
6024 | * sizeof *colors); | |
6025 | ||
6026 | for (i = 0; i < cinfo.actual_number_of_colors; ++i) | |
6027 | { | |
6028 | /* Multiply RGB values with 255 because X expects RGB values | |
6029 | in the range 0..0xffff. */ | |
6030 | int r = cinfo.colormap[ir][i] << 8; | |
6031 | int g = cinfo.colormap[ig][i] << 8; | |
6032 | int b = cinfo.colormap[ib][i] << 8; | |
6033 | colors[i] = lookup_rgb_color (f, r, g, b); | |
6034 | } | |
6035 | ||
6036 | #ifdef COLOR_TABLE_SUPPORT | |
6037 | /* Remember those colors actually allocated. */ | |
6038 | img->colors = colors_in_color_table (&img->ncolors); | |
6039 | free_color_table (); | |
6040 | #endif /* COLOR_TABLE_SUPPORT */ | |
6041 | } | |
6042 | ||
6043 | /* Read pixels. */ | |
6044 | row_stride = width * cinfo.output_components; | |
6045 | buffer = cinfo.mem->alloc_sarray ((j_common_ptr) &cinfo, JPOOL_IMAGE, | |
6046 | row_stride, 1); | |
6047 | for (y = 0; y < height; ++y) | |
6048 | { | |
6049 | fn_jpeg_read_scanlines (&cinfo, buffer, 1); | |
6050 | for (x = 0; x < cinfo.output_width; ++x) | |
6051 | XPutPixel (ximg, x, y, colors[buffer[0][x]]); | |
6052 | } | |
6053 | ||
6054 | /* Clean up. */ | |
6055 | fn_jpeg_finish_decompress (&cinfo); | |
6056 | fn_jpeg_destroy_decompress (&cinfo); | |
6057 | if (fp) | |
6058 | fclose ((FILE *) fp); | |
6059 | ||
6060 | /* Maybe fill in the background field while we have ximg handy. */ | |
6061 | if (NILP (image_spec_value (img->spec, QCbackground, NULL))) | |
6062 | IMAGE_BACKGROUND (img, f, ximg); | |
6063 | ||
6064 | /* Put the image into the pixmap. */ | |
6065 | x_put_x_image (f, ximg, img->pixmap, width, height); | |
6066 | x_destroy_x_image (ximg); | |
6067 | UNGCPRO; | |
6068 | return 1; | |
6069 | } | |
6070 | ||
6071 | #else /* HAVE_JPEG */ | |
6072 | ||
6073 | #ifdef MAC_OS | |
6074 | static int | |
6075 | jpeg_load (f, img) | |
6076 | struct frame *f; | |
6077 | struct image *img; | |
6078 | { | |
6079 | #ifdef MAC_OSX | |
6080 | return image_load_quartz2d (f, img, 0); | |
6081 | #else | |
6082 | return image_load_quicktime (f, img, kQTFileTypeJPEG); | |
6083 | #endif | |
6084 | } | |
6085 | #endif /* MAC_OS */ | |
6086 | ||
6087 | #endif /* !HAVE_JPEG */ | |
6088 | ||
6089 | ||
6090 | \f | |
6091 | /*********************************************************************** | |
6092 | TIFF | |
6093 | ***********************************************************************/ | |
6094 | ||
6095 | #if defined (HAVE_TIFF) || defined (MAC_OS) | |
6096 | ||
6097 | static int tiff_image_p P_ ((Lisp_Object object)); | |
6098 | static int tiff_load P_ ((struct frame *f, struct image *img)); | |
6099 | ||
6100 | /* The symbol `tiff' identifying images of this type. */ | |
6101 | ||
6102 | Lisp_Object Qtiff; | |
6103 | ||
6104 | /* Indices of image specification fields in tiff_format, below. */ | |
6105 | ||
6106 | enum tiff_keyword_index | |
6107 | { | |
6108 | TIFF_TYPE, | |
6109 | TIFF_DATA, | |
6110 | TIFF_FILE, | |
6111 | TIFF_ASCENT, | |
6112 | TIFF_MARGIN, | |
6113 | TIFF_RELIEF, | |
6114 | TIFF_ALGORITHM, | |
6115 | TIFF_HEURISTIC_MASK, | |
6116 | TIFF_MASK, | |
6117 | TIFF_BACKGROUND, | |
6118 | TIFF_LAST | |
6119 | }; | |
6120 | ||
6121 | /* Vector of image_keyword structures describing the format | |
6122 | of valid user-defined image specifications. */ | |
6123 | ||
6124 | static struct image_keyword tiff_format[TIFF_LAST] = | |
6125 | { | |
6126 | {":type", IMAGE_SYMBOL_VALUE, 1}, | |
6127 | {":data", IMAGE_STRING_VALUE, 0}, | |
6128 | {":file", IMAGE_STRING_VALUE, 0}, | |
6129 | {":ascent", IMAGE_ASCENT_VALUE, 0}, | |
6130 | {":margin", IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR, 0}, | |
6131 | {":relief", IMAGE_INTEGER_VALUE, 0}, | |
6132 | {":conversions", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, | |
6133 | {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, | |
6134 | {":mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, | |
6135 | {":background", IMAGE_STRING_OR_NIL_VALUE, 0} | |
6136 | }; | |
6137 | ||
6138 | /* Structure describing the image type `tiff'. */ | |
6139 | ||
6140 | static struct image_type tiff_type = | |
6141 | { | |
6142 | &Qtiff, | |
6143 | tiff_image_p, | |
6144 | tiff_load, | |
6145 | x_clear_image, | |
6146 | NULL | |
6147 | }; | |
6148 | ||
6149 | /* Return non-zero if OBJECT is a valid TIFF image specification. */ | |
6150 | ||
6151 | static int | |
6152 | tiff_image_p (object) | |
6153 | Lisp_Object object; | |
6154 | { | |
6155 | struct image_keyword fmt[TIFF_LAST]; | |
6156 | bcopy (tiff_format, fmt, sizeof fmt); | |
6157 | ||
6158 | if (!parse_image_spec (object, fmt, TIFF_LAST, Qtiff)) | |
6159 | return 0; | |
6160 | ||
6161 | /* Must specify either the :data or :file keyword. */ | |
6162 | return fmt[TIFF_FILE].count + fmt[TIFF_DATA].count == 1; | |
6163 | } | |
6164 | ||
6165 | #endif /* HAVE_TIFF || MAC_OS */ | |
6166 | ||
6167 | #ifdef HAVE_TIFF | |
6168 | ||
6169 | #include <tiffio.h> | |
6170 | ||
6171 | #ifdef HAVE_NTGUI | |
6172 | ||
6173 | /* TIFF library details. */ | |
6174 | DEF_IMGLIB_FN (TIFFSetErrorHandler); | |
6175 | DEF_IMGLIB_FN (TIFFSetWarningHandler); | |
6176 | DEF_IMGLIB_FN (TIFFOpen); | |
6177 | DEF_IMGLIB_FN (TIFFClientOpen); | |
6178 | DEF_IMGLIB_FN (TIFFGetField); | |
6179 | DEF_IMGLIB_FN (TIFFReadRGBAImage); | |
6180 | DEF_IMGLIB_FN (TIFFClose); | |
6181 | ||
6182 | static int | |
6183 | init_tiff_functions (void) | |
6184 | { | |
6185 | HMODULE library; | |
6186 | ||
6187 | if (!(library = LoadLibrary ("libtiff.dll"))) | |
6188 | return 0; | |
6189 | ||
6190 | LOAD_IMGLIB_FN (library, TIFFSetErrorHandler); | |
6191 | LOAD_IMGLIB_FN (library, TIFFSetWarningHandler); | |
6192 | LOAD_IMGLIB_FN (library, TIFFOpen); | |
6193 | LOAD_IMGLIB_FN (library, TIFFClientOpen); | |
6194 | LOAD_IMGLIB_FN (library, TIFFGetField); | |
6195 | LOAD_IMGLIB_FN (library, TIFFReadRGBAImage); | |
6196 | LOAD_IMGLIB_FN (library, TIFFClose); | |
6197 | return 1; | |
6198 | } | |
6199 | ||
6200 | #else | |
6201 | ||
6202 | #define fn_TIFFSetErrorHandler TIFFSetErrorHandler | |
6203 | #define fn_TIFFSetWarningHandler TIFFSetWarningHandler | |
6204 | #define fn_TIFFOpen TIFFOpen | |
6205 | #define fn_TIFFClientOpen TIFFClientOpen | |
6206 | #define fn_TIFFGetField TIFFGetField | |
6207 | #define fn_TIFFReadRGBAImage TIFFReadRGBAImage | |
6208 | #define fn_TIFFClose TIFFClose | |
6209 | ||
6210 | #endif /* HAVE_NTGUI */ | |
6211 | ||
6212 | ||
6213 | /* Reading from a memory buffer for TIFF images Based on the PNG | |
6214 | memory source, but we have to provide a lot of extra functions. | |
6215 | Blah. | |
6216 | ||
6217 | We really only need to implement read and seek, but I am not | |
6218 | convinced that the TIFF library is smart enough not to destroy | |
6219 | itself if we only hand it the function pointers we need to | |
6220 | override. */ | |
6221 | ||
6222 | typedef struct | |
6223 | { | |
6224 | unsigned char *bytes; | |
6225 | size_t len; | |
6226 | int index; | |
6227 | } | |
6228 | tiff_memory_source; | |
6229 | ||
6230 | static size_t | |
6231 | tiff_read_from_memory (data, buf, size) | |
6232 | thandle_t data; | |
6233 | tdata_t buf; | |
6234 | tsize_t size; | |
6235 | { | |
6236 | tiff_memory_source *src = (tiff_memory_source *) data; | |
6237 | ||
6238 | if (size > src->len - src->index) | |
6239 | return (size_t) -1; | |
6240 | bcopy (src->bytes + src->index, buf, size); | |
6241 | src->index += size; | |
6242 | return size; | |
6243 | } | |
6244 | ||
6245 | static size_t | |
6246 | tiff_write_from_memory (data, buf, size) | |
6247 | thandle_t data; | |
6248 | tdata_t buf; | |
6249 | tsize_t size; | |
6250 | { | |
6251 | return (size_t) -1; | |
6252 | } | |
6253 | ||
6254 | static toff_t | |
6255 | tiff_seek_in_memory (data, off, whence) | |
6256 | thandle_t data; | |
6257 | toff_t off; | |
6258 | int whence; | |
6259 | { | |
6260 | tiff_memory_source *src = (tiff_memory_source *) data; | |
6261 | int idx; | |
6262 | ||
6263 | switch (whence) | |
6264 | { | |
6265 | case SEEK_SET: /* Go from beginning of source. */ | |
6266 | idx = off; | |
6267 | break; | |
6268 | ||
6269 | case SEEK_END: /* Go from end of source. */ | |
6270 | idx = src->len + off; | |
6271 | break; | |
6272 | ||
6273 | case SEEK_CUR: /* Go from current position. */ | |
6274 | idx = src->index + off; | |
6275 | break; | |
6276 | ||
6277 | default: /* Invalid `whence'. */ | |
6278 | return -1; | |
6279 | } | |
6280 | ||
6281 | if (idx > src->len || idx < 0) | |
6282 | return -1; | |
6283 | ||
6284 | src->index = idx; | |
6285 | return src->index; | |
6286 | } | |
6287 | ||
6288 | static int | |
6289 | tiff_close_memory (data) | |
6290 | thandle_t data; | |
6291 | { | |
6292 | /* NOOP */ | |
6293 | return 0; | |
6294 | } | |
6295 | ||
6296 | static int | |
6297 | tiff_mmap_memory (data, pbase, psize) | |
6298 | thandle_t data; | |
6299 | tdata_t *pbase; | |
6300 | toff_t *psize; | |
6301 | { | |
6302 | /* It is already _IN_ memory. */ | |
6303 | return 0; | |
6304 | } | |
6305 | ||
6306 | static void | |
6307 | tiff_unmap_memory (data, base, size) | |
6308 | thandle_t data; | |
6309 | tdata_t base; | |
6310 | toff_t size; | |
6311 | { | |
6312 | /* We don't need to do this. */ | |
6313 | } | |
6314 | ||
6315 | static toff_t | |
6316 | tiff_size_of_memory (data) | |
6317 | thandle_t data; | |
6318 | { | |
6319 | return ((tiff_memory_source *) data)->len; | |
6320 | } | |
6321 | ||
6322 | ||
6323 | static void | |
6324 | tiff_error_handler (title, format, ap) | |
6325 | const char *title, *format; | |
6326 | va_list ap; | |
6327 | { | |
6328 | char buf[512]; | |
6329 | int len; | |
6330 | ||
6331 | len = sprintf (buf, "TIFF error: %s ", title); | |
6332 | vsprintf (buf + len, format, ap); | |
6333 | add_to_log (buf, Qnil, Qnil); | |
6334 | } | |
6335 | ||
6336 | ||
6337 | static void | |
6338 | tiff_warning_handler (title, format, ap) | |
6339 | const char *title, *format; | |
6340 | va_list ap; | |
6341 | { | |
6342 | char buf[512]; | |
6343 | int len; | |
6344 | ||
6345 | len = sprintf (buf, "TIFF warning: %s ", title); | |
6346 | vsprintf (buf + len, format, ap); | |
6347 | add_to_log (buf, Qnil, Qnil); | |
6348 | } | |
6349 | ||
6350 | ||
6351 | /* Load TIFF image IMG for use on frame F. Value is non-zero if | |
6352 | successful. */ | |
6353 | ||
6354 | static int | |
6355 | tiff_load (f, img) | |
6356 | struct frame *f; | |
6357 | struct image *img; | |
6358 | { | |
6359 | Lisp_Object file, specified_file; | |
6360 | Lisp_Object specified_data; | |
6361 | TIFF *tiff; | |
6362 | int width, height, x, y; | |
6363 | uint32 *buf; | |
6364 | int rc; | |
6365 | XImagePtr ximg; | |
6366 | struct gcpro gcpro1; | |
6367 | tiff_memory_source memsrc; | |
6368 | ||
6369 | specified_file = image_spec_value (img->spec, QCfile, NULL); | |
6370 | specified_data = image_spec_value (img->spec, QCdata, NULL); | |
6371 | file = Qnil; | |
6372 | GCPRO1 (file); | |
6373 | ||
6374 | fn_TIFFSetErrorHandler (tiff_error_handler); | |
6375 | fn_TIFFSetWarningHandler (tiff_warning_handler); | |
6376 | ||
6377 | if (NILP (specified_data)) | |
6378 | { | |
6379 | /* Read from a file */ | |
6380 | file = x_find_image_file (specified_file); | |
6381 | if (!STRINGP (file)) | |
6382 | { | |
6383 | image_error ("Cannot find image file `%s'", specified_file, Qnil); | |
6384 | UNGCPRO; | |
6385 | return 0; | |
6386 | } | |
6387 | ||
6388 | /* Try to open the image file. */ | |
6389 | tiff = fn_TIFFOpen (SDATA (file), "r"); | |
6390 | if (tiff == NULL) | |
6391 | { | |
6392 | image_error ("Cannot open `%s'", file, Qnil); | |
6393 | UNGCPRO; | |
6394 | return 0; | |
6395 | } | |
6396 | } | |
6397 | else | |
6398 | { | |
6399 | /* Memory source! */ | |
6400 | memsrc.bytes = SDATA (specified_data); | |
6401 | memsrc.len = SBYTES (specified_data); | |
6402 | memsrc.index = 0; | |
6403 | ||
6404 | tiff = fn_TIFFClientOpen ("memory_source", "r", &memsrc, | |
6405 | (TIFFReadWriteProc) tiff_read_from_memory, | |
6406 | (TIFFReadWriteProc) tiff_write_from_memory, | |
6407 | tiff_seek_in_memory, | |
6408 | tiff_close_memory, | |
6409 | tiff_size_of_memory, | |
6410 | tiff_mmap_memory, | |
6411 | tiff_unmap_memory); | |
6412 | ||
6413 | if (!tiff) | |
6414 | { | |
6415 | image_error ("Cannot open memory source for `%s'", img->spec, Qnil); | |
6416 | UNGCPRO; | |
6417 | return 0; | |
6418 | } | |
6419 | } | |
6420 | ||
6421 | /* Get width and height of the image, and allocate a raster buffer | |
6422 | of width x height 32-bit values. */ | |
6423 | fn_TIFFGetField (tiff, TIFFTAG_IMAGEWIDTH, &width); | |
6424 | fn_TIFFGetField (tiff, TIFFTAG_IMAGELENGTH, &height); | |
6425 | buf = (uint32 *) xmalloc (width * height * sizeof *buf); | |
6426 | ||
6427 | rc = fn_TIFFReadRGBAImage (tiff, width, height, buf, 0); | |
6428 | fn_TIFFClose (tiff); | |
6429 | if (!rc) | |
6430 | { | |
6431 | image_error ("Error reading TIFF image `%s'", img->spec, Qnil); | |
6432 | xfree (buf); | |
6433 | UNGCPRO; | |
6434 | return 0; | |
6435 | } | |
6436 | ||
6437 | /* Create the X image and pixmap. */ | |
6438 | if (!x_create_x_image_and_pixmap (f, width, height, 0, &ximg, &img->pixmap)) | |
6439 | { | |
6440 | xfree (buf); | |
6441 | UNGCPRO; | |
6442 | return 0; | |
6443 | } | |
6444 | ||
6445 | /* Initialize the color table. */ | |
6446 | init_color_table (); | |
6447 | ||
6448 | /* Process the pixel raster. Origin is in the lower-left corner. */ | |
6449 | for (y = 0; y < height; ++y) | |
6450 | { | |
6451 | uint32 *row = buf + y * width; | |
6452 | ||
6453 | for (x = 0; x < width; ++x) | |
6454 | { | |
6455 | uint32 abgr = row[x]; | |
6456 | int r = TIFFGetR (abgr) << 8; | |
6457 | int g = TIFFGetG (abgr) << 8; | |
6458 | int b = TIFFGetB (abgr) << 8; | |
6459 | XPutPixel (ximg, x, height - 1 - y, lookup_rgb_color (f, r, g, b)); | |
6460 | } | |
6461 | } | |
6462 | ||
6463 | #ifdef COLOR_TABLE_SUPPORT | |
6464 | /* Remember the colors allocated for the image. Free the color table. */ | |
6465 | img->colors = colors_in_color_table (&img->ncolors); | |
6466 | free_color_table (); | |
6467 | #endif /* COLOR_TABLE_SUPPORT */ | |
6468 | ||
6469 | img->width = width; | |
6470 | img->height = height; | |
6471 | ||
6472 | /* Maybe fill in the background field while we have ximg handy. */ | |
6473 | if (NILP (image_spec_value (img->spec, QCbackground, NULL))) | |
6474 | IMAGE_BACKGROUND (img, f, ximg); | |
6475 | ||
6476 | /* Put the image into the pixmap, then free the X image and its buffer. */ | |
6477 | x_put_x_image (f, ximg, img->pixmap, width, height); | |
6478 | x_destroy_x_image (ximg); | |
6479 | xfree (buf); | |
6480 | ||
6481 | UNGCPRO; | |
6482 | return 1; | |
6483 | } | |
6484 | ||
6485 | #else /* HAVE_TIFF */ | |
6486 | ||
6487 | #ifdef MAC_OS | |
6488 | static int | |
6489 | tiff_load (f, img) | |
6490 | struct frame *f; | |
6491 | struct image *img; | |
6492 | { | |
6493 | return image_load_quicktime (f, img, kQTFileTypeTIFF); | |
6494 | } | |
6495 | #endif /* MAC_OS */ | |
6496 | ||
6497 | #endif /* !HAVE_TIFF */ | |
6498 | ||
6499 | ||
6500 | \f | |
6501 | /*********************************************************************** | |
6502 | GIF | |
6503 | ***********************************************************************/ | |
6504 | ||
6505 | #if defined (HAVE_GIF) || defined (MAC_OS) | |
6506 | ||
6507 | static int gif_image_p P_ ((Lisp_Object object)); | |
6508 | static int gif_load P_ ((struct frame *f, struct image *img)); | |
6509 | ||
6510 | /* The symbol `gif' identifying images of this type. */ | |
6511 | ||
6512 | Lisp_Object Qgif; | |
6513 | ||
6514 | /* Indices of image specification fields in gif_format, below. */ | |
6515 | ||
6516 | enum gif_keyword_index | |
6517 | { | |
6518 | GIF_TYPE, | |
6519 | GIF_DATA, | |
6520 | GIF_FILE, | |
6521 | GIF_ASCENT, | |
6522 | GIF_MARGIN, | |
6523 | GIF_RELIEF, | |
6524 | GIF_ALGORITHM, | |
6525 | GIF_HEURISTIC_MASK, | |
6526 | GIF_MASK, | |
6527 | GIF_IMAGE, | |
6528 | GIF_BACKGROUND, | |
6529 | GIF_LAST | |
6530 | }; | |
6531 | ||
6532 | /* Vector of image_keyword structures describing the format | |
6533 | of valid user-defined image specifications. */ | |
6534 | ||
6535 | static struct image_keyword gif_format[GIF_LAST] = | |
6536 | { | |
6537 | {":type", IMAGE_SYMBOL_VALUE, 1}, | |
6538 | {":data", IMAGE_STRING_VALUE, 0}, | |
6539 | {":file", IMAGE_STRING_VALUE, 0}, | |
6540 | {":ascent", IMAGE_ASCENT_VALUE, 0}, | |
6541 | {":margin", IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR, 0}, | |
6542 | {":relief", IMAGE_INTEGER_VALUE, 0}, | |
6543 | {":conversion", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, | |
6544 | {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, | |
6545 | {":mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, | |
6546 | {":image", IMAGE_NON_NEGATIVE_INTEGER_VALUE, 0}, | |
6547 | {":background", IMAGE_STRING_OR_NIL_VALUE, 0} | |
6548 | }; | |
6549 | ||
6550 | /* Structure describing the image type `gif'. */ | |
6551 | ||
6552 | static struct image_type gif_type = | |
6553 | { | |
6554 | &Qgif, | |
6555 | gif_image_p, | |
6556 | gif_load, | |
6557 | x_clear_image, | |
6558 | NULL | |
6559 | }; | |
6560 | ||
6561 | /* Return non-zero if OBJECT is a valid GIF image specification. */ | |
6562 | ||
6563 | static int | |
6564 | gif_image_p (object) | |
6565 | Lisp_Object object; | |
6566 | { | |
6567 | struct image_keyword fmt[GIF_LAST]; | |
6568 | bcopy (gif_format, fmt, sizeof fmt); | |
6569 | ||
6570 | if (!parse_image_spec (object, fmt, GIF_LAST, Qgif)) | |
6571 | return 0; | |
6572 | ||
6573 | /* Must specify either the :data or :file keyword. */ | |
6574 | return fmt[GIF_FILE].count + fmt[GIF_DATA].count == 1; | |
6575 | } | |
6576 | ||
6577 | #endif /* HAVE_GIF || MAC_OS */ | |
6578 | ||
6579 | #ifdef HAVE_GIF | |
6580 | ||
6581 | #if defined (HAVE_NTGUI) || defined (MAC_OS) | |
6582 | /* avoid conflict with QuickdrawText.h */ | |
6583 | #define DrawText gif_DrawText | |
6584 | #include <gif_lib.h> | |
6585 | #undef DrawText | |
6586 | ||
6587 | #else /* HAVE_NTGUI || MAC_OS */ | |
6588 | ||
6589 | #include <gif_lib.h> | |
6590 | ||
6591 | #endif /* HAVE_NTGUI || MAC_OS */ | |
6592 | ||
6593 | ||
6594 | #ifdef HAVE_NTGUI | |
6595 | ||
6596 | /* GIF library details. */ | |
6597 | DEF_IMGLIB_FN (DGifCloseFile); | |
6598 | DEF_IMGLIB_FN (DGifSlurp); | |
6599 | DEF_IMGLIB_FN (DGifOpen); | |
6600 | DEF_IMGLIB_FN (DGifOpenFileName); | |
6601 | ||
6602 | static int | |
6603 | init_gif_functions (void) | |
6604 | { | |
6605 | HMODULE library; | |
6606 | ||
6607 | if (!(library = LoadLibrary ("libungif.dll"))) | |
6608 | return 0; | |
6609 | ||
6610 | LOAD_IMGLIB_FN (library, DGifCloseFile); | |
6611 | LOAD_IMGLIB_FN (library, DGifSlurp); | |
6612 | LOAD_IMGLIB_FN (library, DGifOpen); | |
6613 | LOAD_IMGLIB_FN (library, DGifOpenFileName); | |
6614 | return 1; | |
6615 | } | |
6616 | ||
6617 | #else | |
6618 | ||
6619 | #define fn_DGifCloseFile DGifCloseFile | |
6620 | #define fn_DGifSlurp DGifSlurp | |
6621 | #define fn_DGifOpen DGifOpen | |
6622 | #define fn_DGifOpenFileName DGifOpenFileName | |
6623 | ||
6624 | #endif /* HAVE_NTGUI */ | |
6625 | ||
6626 | /* Reading a GIF image from memory | |
6627 | Based on the PNG memory stuff to a certain extent. */ | |
6628 | ||
6629 | typedef struct | |
6630 | { | |
6631 | unsigned char *bytes; | |
6632 | size_t len; | |
6633 | int index; | |
6634 | } | |
6635 | gif_memory_source; | |
6636 | ||
6637 | /* Make the current memory source available to gif_read_from_memory. | |
6638 | It's done this way because not all versions of libungif support | |
6639 | a UserData field in the GifFileType structure. */ | |
6640 | static gif_memory_source *current_gif_memory_src; | |
6641 | ||
6642 | static int | |
6643 | gif_read_from_memory (file, buf, len) | |
6644 | GifFileType *file; | |
6645 | GifByteType *buf; | |
6646 | int len; | |
6647 | { | |
6648 | gif_memory_source *src = current_gif_memory_src; | |
6649 | ||
6650 | if (len > src->len - src->index) | |
6651 | return -1; | |
6652 | ||
6653 | bcopy (src->bytes + src->index, buf, len); | |
6654 | src->index += len; | |
6655 | return len; | |
6656 | } | |
6657 | ||
6658 | ||
6659 | /* Load GIF image IMG for use on frame F. Value is non-zero if | |
6660 | successful. */ | |
6661 | ||
6662 | static int | |
6663 | gif_load (f, img) | |
6664 | struct frame *f; | |
6665 | struct image *img; | |
6666 | { | |
6667 | Lisp_Object file, specified_file; | |
6668 | Lisp_Object specified_data; | |
6669 | int rc, width, height, x, y, i; | |
6670 | XImagePtr ximg; | |
6671 | ColorMapObject *gif_color_map; | |
6672 | unsigned long pixel_colors[256]; | |
6673 | GifFileType *gif; | |
6674 | struct gcpro gcpro1; | |
6675 | Lisp_Object image; | |
6676 | int ino, image_left, image_top, image_width, image_height; | |
6677 | gif_memory_source memsrc; | |
6678 | unsigned char *raster; | |
6679 | ||
6680 | specified_file = image_spec_value (img->spec, QCfile, NULL); | |
6681 | specified_data = image_spec_value (img->spec, QCdata, NULL); | |
6682 | file = Qnil; | |
6683 | GCPRO1 (file); | |
6684 | ||
6685 | if (NILP (specified_data)) | |
6686 | { | |
6687 | file = x_find_image_file (specified_file); | |
6688 | if (!STRINGP (file)) | |
6689 | { | |
6690 | image_error ("Cannot find image file `%s'", specified_file, Qnil); | |
6691 | UNGCPRO; | |
6692 | return 0; | |
6693 | } | |
6694 | ||
6695 | /* Open the GIF file. */ | |
6696 | gif = fn_DGifOpenFileName (SDATA (file)); | |
6697 | if (gif == NULL) | |
6698 | { | |
6699 | image_error ("Cannot open `%s'", file, Qnil); | |
6700 | UNGCPRO; | |
6701 | return 0; | |
6702 | } | |
6703 | } | |
6704 | else | |
6705 | { | |
6706 | /* Read from memory! */ | |
6707 | current_gif_memory_src = &memsrc; | |
6708 | memsrc.bytes = SDATA (specified_data); | |
6709 | memsrc.len = SBYTES (specified_data); | |
6710 | memsrc.index = 0; | |
6711 | ||
6712 | gif = fn_DGifOpen(&memsrc, gif_read_from_memory); | |
6713 | if (!gif) | |
6714 | { | |
6715 | image_error ("Cannot open memory source `%s'", img->spec, Qnil); | |
6716 | UNGCPRO; | |
6717 | return 0; | |
6718 | } | |
6719 | } | |
6720 | ||
6721 | /* Read entire contents. */ | |
6722 | rc = fn_DGifSlurp (gif); | |
6723 | if (rc == GIF_ERROR) | |
6724 | { | |
6725 | image_error ("Error reading `%s'", img->spec, Qnil); | |
6726 | fn_DGifCloseFile (gif); | |
6727 | UNGCPRO; | |
6728 | return 0; | |
6729 | } | |
6730 | ||
6731 | image = image_spec_value (img->spec, QCindex, NULL); | |
6732 | ino = INTEGERP (image) ? XFASTINT (image) : 0; | |
6733 | if (ino >= gif->ImageCount) | |
6734 | { | |
6735 | image_error ("Invalid image number `%s' in image `%s'", | |
6736 | image, img->spec); | |
6737 | fn_DGifCloseFile (gif); | |
6738 | UNGCPRO; | |
6739 | return 0; | |
6740 | } | |
6741 | ||
6742 | width = img->width = max (gif->SWidth, gif->Image.Left + gif->Image.Width); | |
6743 | height = img->height = max (gif->SHeight, gif->Image.Top + gif->Image.Height); | |
6744 | ||
6745 | /* Create the X image and pixmap. */ | |
6746 | if (!x_create_x_image_and_pixmap (f, width, height, 0, &ximg, &img->pixmap)) | |
6747 | { | |
6748 | fn_DGifCloseFile (gif); | |
6749 | UNGCPRO; | |
6750 | return 0; | |
6751 | } | |
6752 | ||
6753 | /* Allocate colors. */ | |
6754 | gif_color_map = gif->SavedImages[ino].ImageDesc.ColorMap; | |
6755 | if (!gif_color_map) | |
6756 | gif_color_map = gif->SColorMap; | |
6757 | init_color_table (); | |
6758 | bzero (pixel_colors, sizeof pixel_colors); | |
6759 | ||
6760 | for (i = 0; i < gif_color_map->ColorCount; ++i) | |
6761 | { | |
6762 | int r = gif_color_map->Colors[i].Red << 8; | |
6763 | int g = gif_color_map->Colors[i].Green << 8; | |
6764 | int b = gif_color_map->Colors[i].Blue << 8; | |
6765 | pixel_colors[i] = lookup_rgb_color (f, r, g, b); | |
6766 | } | |
6767 | ||
6768 | #ifdef COLOR_TABLE_SUPPORT | |
6769 | img->colors = colors_in_color_table (&img->ncolors); | |
6770 | free_color_table (); | |
6771 | #endif /* COLOR_TABLE_SUPPORT */ | |
6772 | ||
6773 | /* Clear the part of the screen image that are not covered by | |
6774 | the image from the GIF file. Full animated GIF support | |
6775 | requires more than can be done here (see the gif89 spec, | |
6776 | disposal methods). Let's simply assume that the part | |
6777 | not covered by a sub-image is in the frame's background color. */ | |
6778 | image_top = gif->SavedImages[ino].ImageDesc.Top; | |
6779 | image_left = gif->SavedImages[ino].ImageDesc.Left; | |
6780 | image_width = gif->SavedImages[ino].ImageDesc.Width; | |
6781 | image_height = gif->SavedImages[ino].ImageDesc.Height; | |
6782 | ||
6783 | for (y = 0; y < image_top; ++y) | |
6784 | for (x = 0; x < width; ++x) | |
6785 | XPutPixel (ximg, x, y, FRAME_BACKGROUND_PIXEL (f)); | |
6786 | ||
6787 | for (y = image_top + image_height; y < height; ++y) | |
6788 | for (x = 0; x < width; ++x) | |
6789 | XPutPixel (ximg, x, y, FRAME_BACKGROUND_PIXEL (f)); | |
6790 | ||
6791 | for (y = image_top; y < image_top + image_height; ++y) | |
6792 | { | |
6793 | for (x = 0; x < image_left; ++x) | |
6794 | XPutPixel (ximg, x, y, FRAME_BACKGROUND_PIXEL (f)); | |
6795 | for (x = image_left + image_width; x < width; ++x) | |
6796 | XPutPixel (ximg, x, y, FRAME_BACKGROUND_PIXEL (f)); | |
6797 | } | |
6798 | ||
6799 | /* Read the GIF image into the X image. We use a local variable | |
6800 | `raster' here because RasterBits below is a char *, and invites | |
6801 | problems with bytes >= 0x80. */ | |
6802 | raster = (unsigned char *) gif->SavedImages[ino].RasterBits; | |
6803 | ||
6804 | if (gif->SavedImages[ino].ImageDesc.Interlace) | |
6805 | { | |
6806 | static int interlace_start[] = {0, 4, 2, 1}; | |
6807 | static int interlace_increment[] = {8, 8, 4, 2}; | |
6808 | int pass; | |
6809 | int row = interlace_start[0]; | |
6810 | ||
6811 | pass = 0; | |
6812 | ||
6813 | for (y = 0; y < image_height; y++) | |
6814 | { | |
6815 | if (row >= image_height) | |
6816 | { | |
6817 | row = interlace_start[++pass]; | |
6818 | while (row >= image_height) | |
6819 | row = interlace_start[++pass]; | |
6820 | } | |
6821 | ||
6822 | for (x = 0; x < image_width; x++) | |
6823 | { | |
6824 | int i = raster[(y * image_width) + x]; | |
6825 | XPutPixel (ximg, x + image_left, row + image_top, | |
6826 | pixel_colors[i]); | |
6827 | } | |
6828 | ||
6829 | row += interlace_increment[pass]; | |
6830 | } | |
6831 | } | |
6832 | else | |
6833 | { | |
6834 | for (y = 0; y < image_height; ++y) | |
6835 | for (x = 0; x < image_width; ++x) | |
6836 | { | |
6837 | int i = raster[y * image_width + x]; | |
6838 | XPutPixel (ximg, x + image_left, y + image_top, pixel_colors[i]); | |
6839 | } | |
6840 | } | |
6841 | ||
6842 | fn_DGifCloseFile (gif); | |
6843 | ||
6844 | /* Maybe fill in the background field while we have ximg handy. */ | |
6845 | if (NILP (image_spec_value (img->spec, QCbackground, NULL))) | |
6846 | IMAGE_BACKGROUND (img, f, ximg); | |
6847 | ||
6848 | /* Put the image into the pixmap, then free the X image and its buffer. */ | |
6849 | x_put_x_image (f, ximg, img->pixmap, width, height); | |
6850 | x_destroy_x_image (ximg); | |
6851 | ||
6852 | UNGCPRO; | |
6853 | return 1; | |
6854 | } | |
6855 | ||
6856 | #else | |
6857 | ||
6858 | #ifdef MAC_OS | |
6859 | static int | |
6860 | gif_load (f, img) | |
6861 | struct frame *f; | |
6862 | struct image *img; | |
6863 | { | |
6864 | Lisp_Object specified_file, file; | |
6865 | Lisp_Object specified_data; | |
6866 | OSErr err; | |
6867 | Boolean graphic_p, movie_p, prefer_graphic_p; | |
6868 | Handle dh = NULL; | |
6869 | Movie movie = NULL; | |
6870 | Lisp_Object image; | |
6871 | Track track = NULL; | |
6872 | Media media = NULL; | |
6873 | long nsamples; | |
6874 | Rect rect; | |
6875 | Lisp_Object specified_bg; | |
6876 | XColor color; | |
6877 | RGBColor bg_color; | |
6878 | int width, height; | |
6879 | XImagePtr ximg; | |
6880 | TimeValue time; | |
6881 | struct gcpro gcpro1; | |
6882 | int ino; | |
6883 | ||
6884 | specified_file = image_spec_value (img->spec, QCfile, NULL); | |
6885 | specified_data = image_spec_value (img->spec, QCdata, NULL); | |
6886 | ||
6887 | if (NILP (specified_data)) | |
6888 | { | |
6889 | /* Read from a file */ | |
6890 | FSSpec fss; | |
6891 | short refnum; | |
6892 | ||
6893 | err = find_image_fsspec (specified_file, &file, &fss); | |
6894 | if (err != noErr) | |
6895 | { | |
6896 | if (err == fnfErr) | |
6897 | image_error ("Cannot find image file `%s'", specified_file, Qnil); | |
6898 | else | |
6899 | goto open_error; | |
6900 | } | |
6901 | ||
6902 | err = CanQuickTimeOpenFile (&fss, kQTFileTypeGIF, 0, | |
6903 | &graphic_p, &movie_p, &prefer_graphic_p, 0); | |
6904 | if (err != noErr) | |
6905 | goto open_error; | |
6906 | ||
6907 | if (!graphic_p && !movie_p) | |
6908 | goto open_error; | |
6909 | if (prefer_graphic_p) | |
6910 | return image_load_qt_1 (f, img, kQTFileTypeGIF, &fss, NULL); | |
6911 | err = OpenMovieFile (&fss, &refnum, fsRdPerm); | |
6912 | if (err != noErr) | |
6913 | goto open_error; | |
6914 | err = NewMovieFromFile (&movie, refnum, NULL, NULL, 0, NULL); | |
6915 | CloseMovieFile (refnum); | |
6916 | if (err != noErr) | |
6917 | { | |
6918 | image_error ("Error reading `%s'", file, Qnil); | |
6919 | return 0; | |
6920 | } | |
6921 | } | |
6922 | else | |
6923 | { | |
6924 | /* Memory source! */ | |
6925 | Handle dref = NULL; | |
6926 | long file_type_atom[3]; | |
6927 | ||
6928 | err = PtrToHand (SDATA (specified_data), &dh, SBYTES (specified_data)); | |
6929 | if (err != noErr) | |
6930 | { | |
6931 | image_error ("Cannot allocate data handle for `%s'", | |
6932 | img->spec, Qnil); | |
6933 | goto error; | |
6934 | } | |
6935 | ||
6936 | file_type_atom[0] = EndianU32_NtoB (sizeof (long) * 3); | |
6937 | file_type_atom[1] = EndianU32_NtoB (kDataRefExtensionMacOSFileType); | |
6938 | file_type_atom[2] = EndianU32_NtoB (kQTFileTypeGIF); | |
6939 | err = PtrToHand (&dh, &dref, sizeof (Handle)); | |
6940 | if (err == noErr) | |
6941 | /* no file name */ | |
6942 | err = PtrAndHand ("\p", dref, 1); | |
6943 | if (err == noErr) | |
6944 | err = PtrAndHand (file_type_atom, dref, sizeof (long) * 3); | |
6945 | if (err != noErr) | |
6946 | { | |
6947 | image_error ("Cannot allocate handle data ref for `%s'", img->spec, Qnil); | |
6948 | goto error; | |
6949 | } | |
6950 | err = CanQuickTimeOpenDataRef (dref, HandleDataHandlerSubType, &graphic_p, | |
6951 | &movie_p, &prefer_graphic_p, 0); | |
6952 | if (err != noErr) | |
6953 | goto open_error; | |
6954 | ||
6955 | if (!graphic_p && !movie_p) | |
6956 | goto open_error; | |
6957 | if (prefer_graphic_p) | |
6958 | { | |
6959 | int success_p; | |
6960 | ||
6961 | DisposeHandle (dref); | |
6962 | success_p = image_load_qt_1 (f, img, kQTFileTypeGIF, NULL, dh); | |
6963 | DisposeHandle (dh); | |
6964 | return success_p; | |
6965 | } | |
6966 | err = NewMovieFromDataRef (&movie, 0, NULL, dref, | |
6967 | HandleDataHandlerSubType); | |
6968 | DisposeHandle (dref); | |
6969 | if (err != noErr) | |
6970 | goto open_error; | |
6971 | } | |
6972 | ||
6973 | image = image_spec_value (img->spec, QCindex, NULL); | |
6974 | ino = INTEGERP (image) ? XFASTINT (image) : 0; | |
6975 | track = GetMovieIndTrack (movie, 1); | |
6976 | media = GetTrackMedia (track); | |
6977 | nsamples = GetMediaSampleCount (media); | |
6978 | if (ino >= nsamples) | |
6979 | { | |
6980 | image_error ("Invalid image number `%s' in image `%s'", | |
6981 | image, img->spec); | |
6982 | goto error; | |
6983 | } | |
6984 | ||
6985 | specified_bg = image_spec_value (img->spec, QCbackground, NULL); | |
6986 | if (!STRINGP (specified_bg) || | |
6987 | !mac_defined_color (f, SDATA (specified_bg), &color, 0)) | |
6988 | { | |
6989 | color.pixel = FRAME_BACKGROUND_PIXEL (f); | |
6990 | color.red = RED16_FROM_ULONG (color.pixel); | |
6991 | color.green = GREEN16_FROM_ULONG (color.pixel); | |
6992 | color.blue = BLUE16_FROM_ULONG (color.pixel); | |
6993 | } | |
6994 | GetMovieBox (movie, &rect); | |
6995 | width = img->width = rect.right - rect.left; | |
6996 | height = img->height = rect.bottom - rect.top; | |
6997 | if (!x_create_x_image_and_pixmap (f, width, height, 0, &ximg, &img->pixmap)) | |
6998 | goto error; | |
6999 | ||
7000 | SetGWorld (ximg, NULL); | |
7001 | bg_color.red = color.red; | |
7002 | bg_color.green = color.green; | |
7003 | bg_color.blue = color.blue; | |
7004 | RGBBackColor (&bg_color); | |
7005 | SetMovieActive (movie, TRUE); | |
7006 | SetMovieGWorld (movie, ximg, NULL); | |
7007 | SampleNumToMediaTime (media, ino + 1, &time, NULL); | |
7008 | SetMovieTimeValue (movie, time); | |
7009 | MoviesTask (movie, 0L); | |
7010 | DisposeTrackMedia (media); | |
7011 | DisposeMovieTrack (track); | |
7012 | DisposeMovie (movie); | |
7013 | if (dh) | |
7014 | DisposeHandle (dh); | |
7015 | /* Maybe fill in the background field while we have ximg handy. */ | |
7016 | if (NILP (image_spec_value (img->spec, QCbackground, NULL))) | |
7017 | IMAGE_BACKGROUND (img, f, ximg); | |
7018 | ||
7019 | /* Put the image into the pixmap. */ | |
7020 | x_put_x_image (f, ximg, img->pixmap, width, height); | |
7021 | x_destroy_x_image (ximg); | |
7022 | return 1; | |
7023 | ||
7024 | open_error: | |
7025 | image_error ("Cannot open `%s'", file, Qnil); | |
7026 | error: | |
7027 | if (media) | |
7028 | DisposeTrackMedia (media); | |
7029 | if (track) | |
7030 | DisposeMovieTrack (track); | |
7031 | if (movie) | |
7032 | DisposeMovie (movie); | |
7033 | if (dh) | |
7034 | DisposeHandle (dh); | |
7035 | return 0; | |
7036 | } | |
7037 | #endif /* MAC_OS */ | |
7038 | ||
7039 | #endif /* HAVE_GIF */ | |
7040 | ||
7041 | ||
7042 | \f | |
7043 | /*********************************************************************** | |
7044 | Ghostscript | |
7045 | ***********************************************************************/ | |
7046 | ||
7047 | #ifdef HAVE_X_WINDOWS | |
7048 | #define HAVE_GHOSTSCRIPT 1 | |
7049 | #endif /* HAVE_X_WINDOWS */ | |
7050 | ||
7051 | /* The symbol `postscript' identifying images of this type. */ | |
7052 | ||
7053 | Lisp_Object Qpostscript; | |
7054 | ||
7055 | #ifdef HAVE_GHOSTSCRIPT | |
7056 | ||
7057 | static int gs_image_p P_ ((Lisp_Object object)); | |
7058 | static int gs_load P_ ((struct frame *f, struct image *img)); | |
7059 | static void gs_clear_image P_ ((struct frame *f, struct image *img)); | |
7060 | ||
7061 | /* Keyword symbols. */ | |
7062 | ||
7063 | Lisp_Object QCloader, QCbounding_box, QCpt_width, QCpt_height; | |
7064 | ||
7065 | /* Indices of image specification fields in gs_format, below. */ | |
7066 | ||
7067 | enum gs_keyword_index | |
7068 | { | |
7069 | GS_TYPE, | |
7070 | GS_PT_WIDTH, | |
7071 | GS_PT_HEIGHT, | |
7072 | GS_FILE, | |
7073 | GS_LOADER, | |
7074 | GS_BOUNDING_BOX, | |
7075 | GS_ASCENT, | |
7076 | GS_MARGIN, | |
7077 | GS_RELIEF, | |
7078 | GS_ALGORITHM, | |
7079 | GS_HEURISTIC_MASK, | |
7080 | GS_MASK, | |
7081 | GS_BACKGROUND, | |
7082 | GS_LAST | |
7083 | }; | |
7084 | ||
7085 | /* Vector of image_keyword structures describing the format | |
7086 | of valid user-defined image specifications. */ | |
7087 | ||
7088 | static struct image_keyword gs_format[GS_LAST] = | |
7089 | { | |
7090 | {":type", IMAGE_SYMBOL_VALUE, 1}, | |
7091 | {":pt-width", IMAGE_POSITIVE_INTEGER_VALUE, 1}, | |
7092 | {":pt-height", IMAGE_POSITIVE_INTEGER_VALUE, 1}, | |
7093 | {":file", IMAGE_STRING_VALUE, 1}, | |
7094 | {":loader", IMAGE_FUNCTION_VALUE, 0}, | |
7095 | {":bounding-box", IMAGE_DONT_CHECK_VALUE_TYPE, 1}, | |
7096 | {":ascent", IMAGE_ASCENT_VALUE, 0}, | |
7097 | {":margin", IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR, 0}, | |
7098 | {":relief", IMAGE_INTEGER_VALUE, 0}, | |
7099 | {":conversion", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, | |
7100 | {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, | |
7101 | {":mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, | |
7102 | {":background", IMAGE_STRING_OR_NIL_VALUE, 0} | |
7103 | }; | |
7104 | ||
7105 | /* Structure describing the image type `ghostscript'. */ | |
7106 | ||
7107 | static struct image_type gs_type = | |
7108 | { | |
7109 | &Qpostscript, | |
7110 | gs_image_p, | |
7111 | gs_load, | |
7112 | gs_clear_image, | |
7113 | NULL | |
7114 | }; | |
7115 | ||
7116 | ||
7117 | /* Free X resources of Ghostscript image IMG which is used on frame F. */ | |
7118 | ||
7119 | static void | |
7120 | gs_clear_image (f, img) | |
7121 | struct frame *f; | |
7122 | struct image *img; | |
7123 | { | |
7124 | /* IMG->data.ptr_val may contain a recorded colormap. */ | |
7125 | xfree (img->data.ptr_val); | |
7126 | x_clear_image (f, img); | |
7127 | } | |
7128 | ||
7129 | ||
7130 | /* Return non-zero if OBJECT is a valid Ghostscript image | |
7131 | specification. */ | |
7132 | ||
7133 | static int | |
7134 | gs_image_p (object) | |
7135 | Lisp_Object object; | |
7136 | { | |
7137 | struct image_keyword fmt[GS_LAST]; | |
7138 | Lisp_Object tem; | |
7139 | int i; | |
7140 | ||
7141 | bcopy (gs_format, fmt, sizeof fmt); | |
7142 | ||
7143 | if (!parse_image_spec (object, fmt, GS_LAST, Qpostscript)) | |
7144 | return 0; | |
7145 | ||
7146 | /* Bounding box must be a list or vector containing 4 integers. */ | |
7147 | tem = fmt[GS_BOUNDING_BOX].value; | |
7148 | if (CONSP (tem)) | |
7149 | { | |
7150 | for (i = 0; i < 4; ++i, tem = XCDR (tem)) | |
7151 | if (!CONSP (tem) || !INTEGERP (XCAR (tem))) | |
7152 | return 0; | |
7153 | if (!NILP (tem)) | |
7154 | return 0; | |
7155 | } | |
7156 | else if (VECTORP (tem)) | |
7157 | { | |
7158 | if (XVECTOR (tem)->size != 4) | |
7159 | return 0; | |
7160 | for (i = 0; i < 4; ++i) | |
7161 | if (!INTEGERP (XVECTOR (tem)->contents[i])) | |
7162 | return 0; | |
7163 | } | |
7164 | else | |
7165 | return 0; | |
7166 | ||
7167 | return 1; | |
7168 | } | |
7169 | ||
7170 | ||
7171 | /* Load Ghostscript image IMG for use on frame F. Value is non-zero | |
7172 | if successful. */ | |
7173 | ||
7174 | static int | |
7175 | gs_load (f, img) | |
7176 | struct frame *f; | |
7177 | struct image *img; | |
7178 | { | |
7179 | char buffer[100]; | |
7180 | Lisp_Object window_and_pixmap_id = Qnil, loader, pt_height, pt_width; | |
7181 | struct gcpro gcpro1, gcpro2; | |
7182 | Lisp_Object frame; | |
7183 | double in_width, in_height; | |
7184 | Lisp_Object pixel_colors = Qnil; | |
7185 | ||
7186 | /* Compute pixel size of pixmap needed from the given size in the | |
7187 | image specification. Sizes in the specification are in pt. 1 pt | |
7188 | = 1/72 in, xdpi and ydpi are stored in the frame's X display | |
7189 | info. */ | |
7190 | pt_width = image_spec_value (img->spec, QCpt_width, NULL); | |
7191 | in_width = XFASTINT (pt_width) / 72.0; | |
7192 | img->width = in_width * FRAME_X_DISPLAY_INFO (f)->resx; | |
7193 | pt_height = image_spec_value (img->spec, QCpt_height, NULL); | |
7194 | in_height = XFASTINT (pt_height) / 72.0; | |
7195 | img->height = in_height * FRAME_X_DISPLAY_INFO (f)->resy; | |
7196 | ||
7197 | /* Create the pixmap. */ | |
7198 | xassert (img->pixmap == NO_PIXMAP); | |
7199 | ||
7200 | /* Only W32 version did BLOCK_INPUT here. ++kfs */ | |
7201 | BLOCK_INPUT; | |
7202 | img->pixmap = XCreatePixmap (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), | |
7203 | img->width, img->height, | |
7204 | DefaultDepthOfScreen (FRAME_X_SCREEN (f))); | |
7205 | UNBLOCK_INPUT; | |
7206 | ||
7207 | if (!img->pixmap) | |
7208 | { | |
7209 | image_error ("Unable to create pixmap for `%s'", img->spec, Qnil); | |
7210 | return 0; | |
7211 | } | |
7212 | ||
7213 | /* Call the loader to fill the pixmap. It returns a process object | |
7214 | if successful. We do not record_unwind_protect here because | |
7215 | other places in redisplay like calling window scroll functions | |
7216 | don't either. Let the Lisp loader use `unwind-protect' instead. */ | |
7217 | GCPRO2 (window_and_pixmap_id, pixel_colors); | |
7218 | ||
7219 | sprintf (buffer, "%lu %lu", | |
7220 | (unsigned long) FRAME_X_WINDOW (f), | |
7221 | (unsigned long) img->pixmap); | |
7222 | window_and_pixmap_id = build_string (buffer); | |
7223 | ||
7224 | sprintf (buffer, "%lu %lu", | |
7225 | FRAME_FOREGROUND_PIXEL (f), | |
7226 | FRAME_BACKGROUND_PIXEL (f)); | |
7227 | pixel_colors = build_string (buffer); | |
7228 | ||
7229 | XSETFRAME (frame, f); | |
7230 | loader = image_spec_value (img->spec, QCloader, NULL); | |
7231 | if (NILP (loader)) | |
7232 | loader = intern ("gs-load-image"); | |
7233 | ||
7234 | img->data.lisp_val = call6 (loader, frame, img->spec, | |
7235 | make_number (img->width), | |
7236 | make_number (img->height), | |
7237 | window_and_pixmap_id, | |
7238 | pixel_colors); | |
7239 | UNGCPRO; | |
7240 | return PROCESSP (img->data.lisp_val); | |
7241 | } | |
7242 | ||
7243 | ||
7244 | /* Kill the Ghostscript process that was started to fill PIXMAP on | |
7245 | frame F. Called from XTread_socket when receiving an event | |
7246 | telling Emacs that Ghostscript has finished drawing. */ | |
7247 | ||
7248 | void | |
7249 | x_kill_gs_process (pixmap, f) | |
7250 | Pixmap pixmap; | |
7251 | struct frame *f; | |
7252 | { | |
7253 | struct image_cache *c = FRAME_X_IMAGE_CACHE (f); | |
7254 | int class, i; | |
7255 | struct image *img; | |
7256 | ||
7257 | /* Find the image containing PIXMAP. */ | |
7258 | for (i = 0; i < c->used; ++i) | |
7259 | if (c->images[i]->pixmap == pixmap) | |
7260 | break; | |
7261 | ||
7262 | /* Should someone in between have cleared the image cache, for | |
7263 | instance, give up. */ | |
7264 | if (i == c->used) | |
7265 | return; | |
7266 | ||
7267 | /* Kill the GS process. We should have found PIXMAP in the image | |
7268 | cache and its image should contain a process object. */ | |
7269 | img = c->images[i]; | |
7270 | xassert (PROCESSP (img->data.lisp_val)); | |
7271 | Fkill_process (img->data.lisp_val, Qnil); | |
7272 | img->data.lisp_val = Qnil; | |
7273 | ||
7274 | #if defined (HAVE_X_WINDOWS) | |
7275 | ||
7276 | /* On displays with a mutable colormap, figure out the colors | |
7277 | allocated for the image by looking at the pixels of an XImage for | |
7278 | img->pixmap. */ | |
7279 | class = FRAME_X_VISUAL (f)->class; | |
7280 | if (class != StaticColor && class != StaticGray && class != TrueColor) | |
7281 | { | |
7282 | XImagePtr ximg; | |
7283 | ||
7284 | BLOCK_INPUT; | |
7285 | ||
7286 | /* Try to get an XImage for img->pixmep. */ | |
7287 | ximg = XGetImage (FRAME_X_DISPLAY (f), img->pixmap, | |
7288 | 0, 0, img->width, img->height, ~0, ZPixmap); | |
7289 | if (ximg) | |
7290 | { | |
7291 | int x, y; | |
7292 | ||
7293 | /* Initialize the color table. */ | |
7294 | init_color_table (); | |
7295 | ||
7296 | /* For each pixel of the image, look its color up in the | |
7297 | color table. After having done so, the color table will | |
7298 | contain an entry for each color used by the image. */ | |
7299 | for (y = 0; y < img->height; ++y) | |
7300 | for (x = 0; x < img->width; ++x) | |
7301 | { | |
7302 | unsigned long pixel = XGetPixel (ximg, x, y); | |
7303 | lookup_pixel_color (f, pixel); | |
7304 | } | |
7305 | ||
7306 | /* Record colors in the image. Free color table and XImage. */ | |
7307 | #ifdef COLOR_TABLE_SUPPORT | |
7308 | img->colors = colors_in_color_table (&img->ncolors); | |
7309 | free_color_table (); | |
7310 | #endif | |
7311 | XDestroyImage (ximg); | |
7312 | ||
7313 | #if 0 /* This doesn't seem to be the case. If we free the colors | |
7314 | here, we get a BadAccess later in x_clear_image when | |
7315 | freeing the colors. */ | |
7316 | /* We have allocated colors once, but Ghostscript has also | |
7317 | allocated colors on behalf of us. So, to get the | |
7318 | reference counts right, free them once. */ | |
7319 | if (img->ncolors) | |
7320 | x_free_colors (f, img->colors, img->ncolors); | |
7321 | #endif | |
7322 | } | |
7323 | else | |
7324 | image_error ("Cannot get X image of `%s'; colors will not be freed", | |
7325 | img->spec, Qnil); | |
7326 | ||
7327 | UNBLOCK_INPUT; | |
7328 | } | |
7329 | #endif /* HAVE_X_WINDOWS */ | |
7330 | ||
7331 | /* Now that we have the pixmap, compute mask and transform the | |
7332 | image if requested. */ | |
7333 | BLOCK_INPUT; | |
7334 | postprocess_image (f, img); | |
7335 | UNBLOCK_INPUT; | |
7336 | } | |
7337 | ||
7338 | #endif /* HAVE_GHOSTSCRIPT */ | |
7339 | ||
7340 | \f | |
7341 | /*********************************************************************** | |
7342 | Tests | |
7343 | ***********************************************************************/ | |
7344 | ||
7345 | #if GLYPH_DEBUG | |
7346 | ||
7347 | DEFUN ("imagep", Fimagep, Simagep, 1, 1, 0, | |
7348 | doc: /* Value is non-nil if SPEC is a valid image specification. */) | |
7349 | (spec) | |
7350 | Lisp_Object spec; | |
7351 | { | |
7352 | return valid_image_p (spec) ? Qt : Qnil; | |
7353 | } | |
7354 | ||
7355 | ||
7356 | DEFUN ("lookup-image", Flookup_image, Slookup_image, 1, 1, 0, "") | |
7357 | (spec) | |
7358 | Lisp_Object spec; | |
7359 | { | |
7360 | int id = -1; | |
7361 | ||
7362 | if (valid_image_p (spec)) | |
7363 | id = lookup_image (SELECTED_FRAME (), spec); | |
7364 | ||
7365 | debug_print (spec); | |
7366 | return make_number (id); | |
7367 | } | |
7368 | ||
7369 | #endif /* GLYPH_DEBUG != 0 */ | |
7370 | ||
7371 | ||
7372 | /*********************************************************************** | |
7373 | Initialization | |
7374 | ***********************************************************************/ | |
7375 | ||
7376 | void | |
7377 | syms_of_image () | |
7378 | { | |
7379 | QCascent = intern (":ascent"); | |
7380 | staticpro (&QCascent); | |
7381 | QCmargin = intern (":margin"); | |
7382 | staticpro (&QCmargin); | |
7383 | QCrelief = intern (":relief"); | |
7384 | staticpro (&QCrelief); | |
7385 | QCconversion = intern (":conversion"); | |
7386 | staticpro (&QCconversion); | |
7387 | QCcolor_symbols = intern (":color-symbols"); | |
7388 | staticpro (&QCcolor_symbols); | |
7389 | QCheuristic_mask = intern (":heuristic-mask"); | |
7390 | staticpro (&QCheuristic_mask); | |
7391 | QCindex = intern (":index"); | |
7392 | staticpro (&QCindex); | |
7393 | QCmatrix = intern (":matrix"); | |
7394 | staticpro (&QCmatrix); | |
7395 | QCcolor_adjustment = intern (":color-adjustment"); | |
7396 | staticpro (&QCcolor_adjustment); | |
7397 | QCmask = intern (":mask"); | |
7398 | staticpro (&QCmask); | |
7399 | ||
7400 | Qlaplace = intern ("laplace"); | |
7401 | staticpro (&Qlaplace); | |
7402 | Qemboss = intern ("emboss"); | |
7403 | staticpro (&Qemboss); | |
7404 | Qedge_detection = intern ("edge-detection"); | |
7405 | staticpro (&Qedge_detection); | |
7406 | Qheuristic = intern ("heuristic"); | |
7407 | staticpro (&Qheuristic); | |
4ef0d4d0 KS |
7408 | |
7409 | Qpostscript = intern ("postscript"); | |
7410 | staticpro (&Qpostscript); | |
7411 | #ifdef HAVE_GHOSTSCRIPT | |
7412 | QCloader = intern (":loader"); | |
7413 | staticpro (&QCloader); | |
7414 | QCbounding_box = intern (":bounding-box"); | |
7415 | staticpro (&QCbounding_box); | |
7416 | QCpt_width = intern (":pt-width"); | |
7417 | staticpro (&QCpt_width); | |
7418 | QCpt_height = intern (":pt-height"); | |
7419 | staticpro (&QCpt_height); | |
7420 | #endif /* HAVE_GHOSTSCRIPT */ | |
7421 | ||
7422 | Qpbm = intern ("pbm"); | |
7423 | staticpro (&Qpbm); | |
7424 | ||
7425 | Qxbm = intern ("xbm"); | |
7426 | staticpro (&Qxbm); | |
7427 | ||
7428 | #ifdef HAVE_XPM | |
7429 | Qxpm = intern ("xpm"); | |
7430 | staticpro (&Qxpm); | |
7431 | #endif | |
7432 | ||
7433 | #if defined (HAVE_JPEG) || defined (MAC_OS) | |
7434 | Qjpeg = intern ("jpeg"); | |
7435 | staticpro (&Qjpeg); | |
7436 | #endif | |
7437 | ||
7438 | #if defined (HAVE_TIFF) || defined (MAC_OS) | |
7439 | Qtiff = intern ("tiff"); | |
7440 | staticpro (&Qtiff); | |
7441 | #endif | |
7442 | ||
7443 | #if defined (HAVE_GIF) || defined (MAC_OS) | |
7444 | Qgif = intern ("gif"); | |
7445 | staticpro (&Qgif); | |
7446 | #endif | |
7447 | ||
7448 | #if defined (HAVE_PNG) || defined (MAC_OS) | |
7449 | Qpng = intern ("png"); | |
7450 | staticpro (&Qpng); | |
7451 | #endif | |
7452 | ||
7453 | defsubr (&Sclear_image_cache); | |
7454 | defsubr (&Simage_size); | |
7455 | defsubr (&Simage_mask_p); | |
7456 | ||
7457 | #if GLYPH_DEBUG | |
7458 | defsubr (&Simagep); | |
7459 | defsubr (&Slookup_image); | |
7460 | #endif | |
7461 | ||
7462 | DEFVAR_BOOL ("cross-disabled-images", &cross_disabled_images, | |
7463 | doc: /* Non-nil means always draw a cross over disabled images. | |
7464 | Disabled images are those having an `:conversion disabled' property. | |
7465 | A cross is always drawn on black & white displays. */); | |
7466 | cross_disabled_images = 0; | |
7467 | ||
7468 | DEFVAR_LISP ("x-bitmap-file-path", &Vx_bitmap_file_path, | |
7469 | doc: /* List of directories to search for window system bitmap files. */); | |
7470 | Vx_bitmap_file_path = decode_env_path ((char *) 0, PATH_BITMAPS); | |
7471 | ||
7472 | DEFVAR_LISP ("image-cache-eviction-delay", &Vimage_cache_eviction_delay, | |
7473 | doc: /* Time after which cached images are removed from the cache. | |
7474 | When an image has not been displayed this many seconds, remove it | |
7475 | from the image cache. Value must be an integer or nil with nil | |
7476 | meaning don't clear the cache. */); | |
7477 | Vimage_cache_eviction_delay = make_number (30 * 60); | |
7478 | } | |
7479 | ||
7480 | ||
7481 | #ifdef HAVE_NTGUI | |
7482 | /* Image types that rely on external libraries are loaded dynamically | |
7483 | if the library is available. */ | |
7484 | #define IF_LIB_AVAILABLE(init_lib_fn) if (init_lib_fn()) | |
7485 | #else | |
7486 | #define IF_LIB_AVAILABLE(init_func) /* Load unconditionally */ | |
7487 | #endif /* HAVE_NTGUI */ | |
7488 | ||
7489 | void | |
7490 | init_image () | |
7491 | { | |
7492 | image_types = NULL; | |
7493 | Vimage_types = Qnil; | |
7494 | ||
7495 | define_image_type (&xbm_type); | |
7496 | define_image_type (&pbm_type); | |
7497 | ||
7498 | #ifdef HAVE_XPM | |
7499 | IF_LIB_AVAILABLE(init_xpm_functions) | |
7500 | define_image_type (&xpm_type); | |
7501 | #endif | |
7502 | ||
7503 | #if defined (HAVE_JPEG) || defined (MAC_OS) | |
7504 | IF_LIB_AVAILABLE(init_jpeg_functions) | |
7505 | define_image_type (&jpeg_type); | |
7506 | #endif | |
7507 | ||
7508 | #if defined (HAVE_TIFF) || defined (MAC_OS) | |
7509 | IF_LIB_AVAILABLE(init_tiff_functions) | |
7510 | define_image_type (&tiff_type); | |
7511 | #endif | |
7512 | ||
7513 | #if defined (HAVE_GIF) || defined (MAC_OS) | |
7514 | IF_LIB_AVAILABLE(init_gif_functions) | |
7515 | define_image_type (&gif_type); | |
7516 | #endif | |
7517 | ||
7518 | #if defined (HAVE_PNG) || defined (MAC_OS) | |
7519 | IF_LIB_AVAILABLE(init_png_functions) | |
7520 | define_image_type (&png_type); | |
7521 | #endif | |
7522 | ||
7523 | #ifdef HAVE_GHOSTSCRIPT | |
7524 | define_image_type (&gs_type); | |
7525 | #endif | |
7526 | ||
7527 | #ifdef MAC_OS | |
7528 | /* Animated gifs use QuickTime Movie Toolbox. So initialize it here. */ | |
7529 | EnterMovies (); | |
7530 | #ifdef MAC_OSX | |
7531 | init_image_func_pointer (); | |
7532 | #endif | |
7533 | #endif | |
7534 | } | |
7535 | ||
1b9f8cec MB |
7536 | /* arch-tag: 123c2a5e-14a8-4c53-ab95-af47d7db49b9 |
7537 | (do not change this comment) */ |