| 1 | /* xftfont.c -- XFT font driver. |
| 2 | Copyright (C) 2006, 2007, 2008, 2009 Free Software Foundation, Inc. |
| 3 | Copyright (C) 2006, 2007, 2008, 2009 |
| 4 | National Institute of Advanced Industrial Science and Technology (AIST) |
| 5 | Registration Number H13PRO009 |
| 6 | |
| 7 | This file is part of GNU Emacs. |
| 8 | |
| 9 | GNU Emacs is free software: you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation, either version 3 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | GNU Emacs is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 21 | |
| 22 | #include <config.h> |
| 23 | #include <stdio.h> |
| 24 | #include <X11/Xlib.h> |
| 25 | #include <X11/Xft/Xft.h> |
| 26 | |
| 27 | #include "lisp.h" |
| 28 | #include "dispextern.h" |
| 29 | #include "xterm.h" |
| 30 | #include "frame.h" |
| 31 | #include "blockinput.h" |
| 32 | #include "character.h" |
| 33 | #include "charset.h" |
| 34 | #include "fontset.h" |
| 35 | #include "font.h" |
| 36 | #include "ftfont.h" |
| 37 | |
| 38 | /* Xft font driver. */ |
| 39 | |
| 40 | static Lisp_Object Qxft; |
| 41 | static Lisp_Object QChinting , QCautohint, QChintstyle, QCrgba, QCembolden; |
| 42 | |
| 43 | /* The actual structure for Xft font that can be casted to struct |
| 44 | font. */ |
| 45 | |
| 46 | struct xftfont_info |
| 47 | { |
| 48 | struct font font; |
| 49 | /* The following four members must be here in this order to be |
| 50 | compatible with struct ftfont_info (in ftfont.c). */ |
| 51 | #ifdef HAVE_LIBOTF |
| 52 | int maybe_otf; /* Flag to tell if this may be OTF or not. */ |
| 53 | OTF *otf; |
| 54 | #endif /* HAVE_LIBOTF */ |
| 55 | FT_Size ft_size; |
| 56 | int index; |
| 57 | Display *display; |
| 58 | int screen; |
| 59 | XftFont *xftfont; |
| 60 | }; |
| 61 | |
| 62 | /* Structure pointed by (struct face *)->extra */ |
| 63 | |
| 64 | struct xftface_info |
| 65 | { |
| 66 | XftColor xft_fg; /* color for face->foreground */ |
| 67 | XftColor xft_bg; /* color for face->background */ |
| 68 | }; |
| 69 | |
| 70 | static void xftfont_get_colors P_ ((FRAME_PTR, struct face *, GC gc, |
| 71 | struct xftface_info *, |
| 72 | XftColor *fg, XftColor *bg)); |
| 73 | |
| 74 | |
| 75 | /* Setup foreground and background colors of GC into FG and BG. If |
| 76 | XFTFACE_INFO is not NULL, reuse the colors in it if possible. BG |
| 77 | may be NULL. */ |
| 78 | |
| 79 | static void |
| 80 | xftfont_get_colors (f, face, gc, xftface_info, fg, bg) |
| 81 | FRAME_PTR f; |
| 82 | struct face *face; |
| 83 | GC gc; |
| 84 | struct xftface_info *xftface_info; |
| 85 | XftColor *fg, *bg; |
| 86 | { |
| 87 | if (xftface_info && face->gc == gc) |
| 88 | { |
| 89 | *fg = xftface_info->xft_fg; |
| 90 | if (bg) |
| 91 | *bg = xftface_info->xft_bg; |
| 92 | } |
| 93 | else |
| 94 | { |
| 95 | XGCValues xgcv; |
| 96 | int fg_done = 0, bg_done = 0; |
| 97 | |
| 98 | BLOCK_INPUT; |
| 99 | XGetGCValues (FRAME_X_DISPLAY (f), gc, |
| 100 | GCForeground | GCBackground, &xgcv); |
| 101 | if (xftface_info) |
| 102 | { |
| 103 | if (xgcv.foreground == face->foreground) |
| 104 | *fg = xftface_info->xft_fg, fg_done = 1; |
| 105 | else if (xgcv.foreground == face->background) |
| 106 | *fg = xftface_info->xft_bg, fg_done = 1; |
| 107 | if (! bg) |
| 108 | bg_done = 1; |
| 109 | else if (xgcv.background == face->background) |
| 110 | *bg = xftface_info->xft_bg, bg_done = 1; |
| 111 | else if (xgcv.background == face->foreground) |
| 112 | *bg = xftface_info->xft_fg, bg_done = 1; |
| 113 | } |
| 114 | |
| 115 | if (fg_done + bg_done < 2) |
| 116 | { |
| 117 | XColor colors[2]; |
| 118 | |
| 119 | colors[0].pixel = fg->pixel = xgcv.foreground; |
| 120 | if (bg) |
| 121 | colors[1].pixel = bg->pixel = xgcv.background; |
| 122 | XQueryColors (FRAME_X_DISPLAY (f), FRAME_X_COLORMAP (f), colors, |
| 123 | bg ? 2 : 1); |
| 124 | fg->color.alpha = 0xFFFF; |
| 125 | fg->color.red = colors[0].red; |
| 126 | fg->color.green = colors[0].green; |
| 127 | fg->color.blue = colors[0].blue; |
| 128 | if (bg) |
| 129 | { |
| 130 | bg->color.alpha = 0xFFFF; |
| 131 | bg->color.red = colors[1].red; |
| 132 | bg->color.green = colors[1].green; |
| 133 | bg->color.blue = colors[1].blue; |
| 134 | } |
| 135 | } |
| 136 | UNBLOCK_INPUT; |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | |
| 141 | static Lisp_Object xftfont_list P_ ((Lisp_Object, Lisp_Object)); |
| 142 | static Lisp_Object xftfont_match P_ ((Lisp_Object, Lisp_Object)); |
| 143 | static Lisp_Object xftfont_open P_ ((FRAME_PTR, Lisp_Object, int)); |
| 144 | static void xftfont_close P_ ((FRAME_PTR, struct font *)); |
| 145 | static int xftfont_prepare_face P_ ((FRAME_PTR, struct face *)); |
| 146 | static void xftfont_done_face P_ ((FRAME_PTR, struct face *)); |
| 147 | static int xftfont_has_char P_ ((Lisp_Object, int)); |
| 148 | static unsigned xftfont_encode_char P_ ((struct font *, int)); |
| 149 | static int xftfont_text_extents P_ ((struct font *, unsigned *, int, |
| 150 | struct font_metrics *)); |
| 151 | static int xftfont_draw P_ ((struct glyph_string *, int, int, int, int, int)); |
| 152 | static int xftfont_end_for_frame P_ ((FRAME_PTR f)); |
| 153 | |
| 154 | struct font_driver xftfont_driver; |
| 155 | |
| 156 | static Lisp_Object |
| 157 | xftfont_list (frame, spec) |
| 158 | Lisp_Object frame; |
| 159 | Lisp_Object spec; |
| 160 | { |
| 161 | Lisp_Object list = ftfont_driver.list (frame, spec), tail; |
| 162 | |
| 163 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
| 164 | ASET (XCAR (tail), FONT_TYPE_INDEX, Qxft); |
| 165 | return list; |
| 166 | } |
| 167 | |
| 168 | static Lisp_Object |
| 169 | xftfont_match (frame, spec) |
| 170 | Lisp_Object frame; |
| 171 | Lisp_Object spec; |
| 172 | { |
| 173 | Lisp_Object entity = ftfont_driver.match (frame, spec); |
| 174 | |
| 175 | if (! NILP (entity)) |
| 176 | ASET (entity, FONT_TYPE_INDEX, Qxft); |
| 177 | return entity; |
| 178 | } |
| 179 | |
| 180 | extern Lisp_Object ftfont_font_format P_ ((FcPattern *, Lisp_Object)); |
| 181 | extern FcCharSet *ftfont_get_fc_charset P_ ((Lisp_Object)); |
| 182 | extern Lisp_Object QCantialias; |
| 183 | |
| 184 | static FcChar8 ascii_printable[95]; |
| 185 | |
| 186 | static Lisp_Object |
| 187 | xftfont_open (f, entity, pixel_size) |
| 188 | FRAME_PTR f; |
| 189 | Lisp_Object entity; |
| 190 | int pixel_size; |
| 191 | { |
| 192 | FcResult result; |
| 193 | Display *display = FRAME_X_DISPLAY (f); |
| 194 | Lisp_Object val, filename, index, tail, font_object; |
| 195 | FcPattern *pat = NULL, *match; |
| 196 | struct xftfont_info *xftfont_info = NULL; |
| 197 | struct font *font; |
| 198 | double size = 0; |
| 199 | XftFont *xftfont = NULL; |
| 200 | int spacing; |
| 201 | char name[256]; |
| 202 | int len, i; |
| 203 | XGlyphInfo extents; |
| 204 | FT_Face ft_face; |
| 205 | |
| 206 | val = assq_no_quit (QCfont_entity, AREF (entity, FONT_EXTRA_INDEX)); |
| 207 | if (! CONSP (val)) |
| 208 | return Qnil; |
| 209 | val = XCDR (val); |
| 210 | filename = XCAR (val); |
| 211 | index = XCDR (val); |
| 212 | size = XINT (AREF (entity, FONT_SIZE_INDEX)); |
| 213 | if (size == 0) |
| 214 | size = pixel_size; |
| 215 | pat = FcPatternCreate (); |
| 216 | FcPatternAddInteger (pat, FC_WEIGHT, FONT_WEIGHT_NUMERIC (entity)); |
| 217 | i = FONT_SLANT_NUMERIC (entity) - 100; |
| 218 | if (i < 0) i = 0; |
| 219 | FcPatternAddInteger (pat, FC_SLANT, i); |
| 220 | FcPatternAddInteger (pat, FC_WIDTH, FONT_WIDTH_NUMERIC (entity)); |
| 221 | FcPatternAddDouble (pat, FC_PIXEL_SIZE, pixel_size); |
| 222 | val = AREF (entity, FONT_FAMILY_INDEX); |
| 223 | if (! NILP (val)) |
| 224 | FcPatternAddString (pat, FC_FAMILY, (FcChar8 *) SDATA (SYMBOL_NAME (val))); |
| 225 | val = AREF (entity, FONT_FOUNDRY_INDEX); |
| 226 | if (! NILP (val)) |
| 227 | FcPatternAddString (pat, FC_FOUNDRY, (FcChar8 *) SDATA (SYMBOL_NAME (val))); |
| 228 | val = AREF (entity, FONT_SPACING_INDEX); |
| 229 | if (! NILP (val)) |
| 230 | FcPatternAddInteger (pat, FC_SPACING, XINT (val)); |
| 231 | val = AREF (entity, FONT_DPI_INDEX); |
| 232 | if (! NILP (val)) |
| 233 | { |
| 234 | double dbl = XINT (val); |
| 235 | |
| 236 | FcPatternAddDouble (pat, FC_DPI, dbl); |
| 237 | } |
| 238 | val = AREF (entity, FONT_AVGWIDTH_INDEX); |
| 239 | if (INTEGERP (val) && XINT (val) == 0) |
| 240 | FcPatternAddBool (pat, FC_SCALABLE, FcTrue); |
| 241 | /* This is necessary to identify the exact font (e.g. 10x20.pcf.gz |
| 242 | over 10x20-ISO8859-1.pcf.gz). */ |
| 243 | FcPatternAddCharSet (pat, FC_CHARSET, ftfont_get_fc_charset (entity)); |
| 244 | |
| 245 | for (tail = AREF (entity, FONT_EXTRA_INDEX); CONSP (tail); tail = XCDR (tail)) |
| 246 | { |
| 247 | Lisp_Object key, val; |
| 248 | |
| 249 | key = XCAR (XCAR (tail)), val = XCDR (XCAR (tail)); |
| 250 | if (EQ (key, QCantialias)) |
| 251 | FcPatternAddBool (pat, FC_ANTIALIAS, NILP (val) ? FcFalse : FcTrue); |
| 252 | else if (EQ (key, QChinting)) |
| 253 | FcPatternAddBool (pat, FC_HINTING, NILP (val) ? FcFalse : FcTrue); |
| 254 | else if (EQ (key, QCautohint)) |
| 255 | FcPatternAddBool (pat, FC_AUTOHINT, NILP (val) ? FcFalse : FcTrue); |
| 256 | else if (EQ (key, QChintstyle)) |
| 257 | { |
| 258 | if (INTEGERP (val)) |
| 259 | FcPatternAddInteger (pat, FC_RGBA, XINT (val)); |
| 260 | } |
| 261 | else if (EQ (key, QCrgba)) |
| 262 | { |
| 263 | if (INTEGERP (val)) |
| 264 | FcPatternAddInteger (pat, FC_RGBA, XINT (val)); |
| 265 | } |
| 266 | #ifdef FC_EMBOLDEN |
| 267 | else if (EQ (key, QCembolden)) |
| 268 | FcPatternAddBool (pat, FC_EMBOLDEN, NILP (val) ? FcFalse : FcTrue); |
| 269 | #endif |
| 270 | } |
| 271 | |
| 272 | FcPatternAddString (pat, FC_FILE, (FcChar8 *) SDATA (filename)); |
| 273 | FcPatternAddInteger (pat, FC_INDEX, XINT (index)); |
| 274 | |
| 275 | |
| 276 | BLOCK_INPUT; |
| 277 | match = XftFontMatch (display, FRAME_X_SCREEN_NUMBER (f), pat, &result); |
| 278 | FcPatternDestroy (pat); |
| 279 | xftfont = XftFontOpenPattern (display, match); |
| 280 | ft_face = XftLockFace (xftfont); |
| 281 | UNBLOCK_INPUT; |
| 282 | |
| 283 | if (! xftfont) |
| 284 | { |
| 285 | XftPatternDestroy (match); |
| 286 | return Qnil; |
| 287 | } |
| 288 | /* We should not destroy PAT here because it is kept in XFTFONT and |
| 289 | destroyed automatically when XFTFONT is closed. */ |
| 290 | font_object = font_make_object (VECSIZE (struct xftfont_info), entity, size); |
| 291 | ASET (font_object, FONT_TYPE_INDEX, Qxft); |
| 292 | len = font_unparse_xlfd (entity, size, name, 256); |
| 293 | if (len > 0) |
| 294 | ASET (font_object, FONT_NAME_INDEX, make_string (name, len)); |
| 295 | len = font_unparse_fcname (entity, size, name, 256); |
| 296 | if (len > 0) |
| 297 | ASET (font_object, FONT_FULLNAME_INDEX, make_string (name, len)); |
| 298 | else |
| 299 | ASET (font_object, FONT_FULLNAME_INDEX, |
| 300 | AREF (font_object, FONT_NAME_INDEX)); |
| 301 | ASET (font_object, FONT_FILE_INDEX, filename); |
| 302 | ASET (font_object, FONT_FORMAT_INDEX, |
| 303 | ftfont_font_format (xftfont->pattern, filename)); |
| 304 | font = XFONT_OBJECT (font_object); |
| 305 | font->pixel_size = pixel_size; |
| 306 | font->driver = &xftfont_driver; |
| 307 | font->encoding_charset = font->repertory_charset = -1; |
| 308 | |
| 309 | xftfont_info = (struct xftfont_info *) font; |
| 310 | xftfont_info->display = display; |
| 311 | xftfont_info->screen = FRAME_X_SCREEN_NUMBER (f); |
| 312 | xftfont_info->xftfont = xftfont; |
| 313 | font->pixel_size = size; |
| 314 | font->driver = &xftfont_driver; |
| 315 | if (INTEGERP (AREF (entity, FONT_SPACING_INDEX))) |
| 316 | spacing = XINT (AREF (entity, FONT_SPACING_INDEX)); |
| 317 | else |
| 318 | spacing = FC_PROPORTIONAL; |
| 319 | if (! ascii_printable[0]) |
| 320 | { |
| 321 | int i; |
| 322 | for (i = 0; i < 95; i++) |
| 323 | ascii_printable[i] = ' ' + i; |
| 324 | } |
| 325 | BLOCK_INPUT; |
| 326 | if (spacing != FC_PROPORTIONAL) |
| 327 | { |
| 328 | font->min_width = font->average_width = font->space_width |
| 329 | = xftfont->max_advance_width; |
| 330 | XftTextExtents8 (display, xftfont, ascii_printable + 1, 94, &extents); |
| 331 | } |
| 332 | else |
| 333 | { |
| 334 | XftTextExtents8 (display, xftfont, ascii_printable, 1, &extents); |
| 335 | font->space_width = extents.xOff; |
| 336 | if (font->space_width <= 0) |
| 337 | /* dirty workaround */ |
| 338 | font->space_width = pixel_size; |
| 339 | XftTextExtents8 (display, xftfont, ascii_printable + 1, 94, &extents); |
| 340 | font->average_width = (font->space_width + extents.xOff) / 95; |
| 341 | } |
| 342 | UNBLOCK_INPUT; |
| 343 | |
| 344 | font->ascent = xftfont->ascent; |
| 345 | font->descent = xftfont->descent; |
| 346 | if (pixel_size >= 5) |
| 347 | { |
| 348 | /* The above condition is a dirty workaround because |
| 349 | XftTextExtents8 behaves strangely for some fonts |
| 350 | (e.g. "Dejavu Sans Mono") when pixel_size is less than 5. */ |
| 351 | if (font->ascent < extents.y) |
| 352 | font->ascent = extents.y; |
| 353 | if (font->descent < extents.height - extents.y) |
| 354 | font->descent = extents.height - extents.y; |
| 355 | } |
| 356 | font->height = font->ascent + font->descent; |
| 357 | |
| 358 | if (XINT (AREF (entity, FONT_SIZE_INDEX)) == 0) |
| 359 | { |
| 360 | int upEM = ft_face->units_per_EM; |
| 361 | |
| 362 | font->underline_position = -ft_face->underline_position * size / upEM; |
| 363 | font->underline_thickness = -ft_face->underline_thickness * size / upEM; |
| 364 | if (font->underline_thickness > 2) |
| 365 | font->underline_position -= font->underline_thickness / 2; |
| 366 | } |
| 367 | else |
| 368 | { |
| 369 | font->underline_position = -1; |
| 370 | font->underline_thickness = 0; |
| 371 | } |
| 372 | #ifdef HAVE_LIBOTF |
| 373 | xftfont_info->maybe_otf = ft_face->face_flags & FT_FACE_FLAG_SFNT; |
| 374 | xftfont_info->otf = NULL; |
| 375 | #endif /* HAVE_LIBOTF */ |
| 376 | xftfont_info->ft_size = ft_face->size; |
| 377 | |
| 378 | /* Unfortunately Xft doesn't provide a way to get minimum char |
| 379 | width. So, we use space_width instead. */ |
| 380 | font->min_width = font->space_width; |
| 381 | |
| 382 | font->baseline_offset = 0; |
| 383 | font->relative_compose = 0; |
| 384 | font->default_ascent = 0; |
| 385 | font->vertical_centering = 0; |
| 386 | #ifdef FT_BDF_H |
| 387 | if (! (ft_face->face_flags & FT_FACE_FLAG_SFNT)) |
| 388 | { |
| 389 | BDF_PropertyRec rec; |
| 390 | |
| 391 | if (FT_Get_BDF_Property (ft_face, "_MULE_BASELINE_OFFSET", &rec) == 0 |
| 392 | && rec.type == BDF_PROPERTY_TYPE_INTEGER) |
| 393 | font->baseline_offset = rec.u.integer; |
| 394 | if (FT_Get_BDF_Property (ft_face, "_MULE_RELATIVE_COMPOSE", &rec) == 0 |
| 395 | && rec.type == BDF_PROPERTY_TYPE_INTEGER) |
| 396 | font->relative_compose = rec.u.integer; |
| 397 | if (FT_Get_BDF_Property (ft_face, "_MULE_DEFAULT_ASCENT", &rec) == 0 |
| 398 | && rec.type == BDF_PROPERTY_TYPE_INTEGER) |
| 399 | font->default_ascent = rec.u.integer; |
| 400 | } |
| 401 | #endif |
| 402 | |
| 403 | return font_object; |
| 404 | } |
| 405 | |
| 406 | static void |
| 407 | xftfont_close (f, font) |
| 408 | FRAME_PTR f; |
| 409 | struct font *font; |
| 410 | { |
| 411 | struct xftfont_info *xftfont_info = (struct xftfont_info *) font; |
| 412 | |
| 413 | #ifdef HAVE_LIBOTF |
| 414 | if (xftfont_info->otf) |
| 415 | OTF_close (xftfont_info->otf); |
| 416 | #endif |
| 417 | BLOCK_INPUT; |
| 418 | XftUnlockFace (xftfont_info->xftfont); |
| 419 | XftFontClose (xftfont_info->display, xftfont_info->xftfont); |
| 420 | UNBLOCK_INPUT; |
| 421 | } |
| 422 | |
| 423 | static int |
| 424 | xftfont_prepare_face (f, face) |
| 425 | FRAME_PTR f; |
| 426 | struct face *face; |
| 427 | { |
| 428 | struct xftface_info *xftface_info; |
| 429 | |
| 430 | #if 0 |
| 431 | /* This doesn't work if face->ascii_face doesn't use an Xft font. */ |
| 432 | if (face != face->ascii_face) |
| 433 | { |
| 434 | face->extra = face->ascii_face->extra; |
| 435 | return 0; |
| 436 | } |
| 437 | #endif |
| 438 | |
| 439 | xftface_info = malloc (sizeof (struct xftface_info)); |
| 440 | if (! xftface_info) |
| 441 | return -1; |
| 442 | xftfont_get_colors (f, face, face->gc, NULL, |
| 443 | &xftface_info->xft_fg, &xftface_info->xft_bg); |
| 444 | face->extra = xftface_info; |
| 445 | return 0; |
| 446 | } |
| 447 | |
| 448 | static void |
| 449 | xftfont_done_face (f, face) |
| 450 | FRAME_PTR f; |
| 451 | struct face *face; |
| 452 | { |
| 453 | struct xftface_info *xftface_info; |
| 454 | |
| 455 | #if 0 |
| 456 | /* This doesn't work if face->ascii_face doesn't use an Xft font. */ |
| 457 | if (face != face->ascii_face |
| 458 | || ! face->extra) |
| 459 | return; |
| 460 | #endif |
| 461 | |
| 462 | xftface_info = (struct xftface_info *) face->extra; |
| 463 | if (xftface_info) |
| 464 | { |
| 465 | free (xftface_info); |
| 466 | face->extra = NULL; |
| 467 | } |
| 468 | } |
| 469 | |
| 470 | static int |
| 471 | xftfont_has_char (font, c) |
| 472 | Lisp_Object font; |
| 473 | int c; |
| 474 | { |
| 475 | struct xftfont_info *xftfont_info; |
| 476 | |
| 477 | if (FONT_ENTITY_P (font)) |
| 478 | return ftfont_driver.has_char (font, c); |
| 479 | |
| 480 | xftfont_info = (struct xftfont_info *) XFONT_OBJECT (font); |
| 481 | return (XftCharExists (xftfont_info->display, xftfont_info->xftfont, |
| 482 | (FcChar32) c) == FcTrue); |
| 483 | } |
| 484 | |
| 485 | static unsigned |
| 486 | xftfont_encode_char (font, c) |
| 487 | struct font *font; |
| 488 | int c; |
| 489 | { |
| 490 | struct xftfont_info *xftfont_info = (struct xftfont_info *) font; |
| 491 | unsigned code = XftCharIndex (xftfont_info->display, xftfont_info->xftfont, |
| 492 | (FcChar32) c); |
| 493 | |
| 494 | return (code ? code : FONT_INVALID_CODE); |
| 495 | } |
| 496 | |
| 497 | static int |
| 498 | xftfont_text_extents (font, code, nglyphs, metrics) |
| 499 | struct font *font; |
| 500 | unsigned *code; |
| 501 | int nglyphs; |
| 502 | struct font_metrics *metrics; |
| 503 | { |
| 504 | struct xftfont_info *xftfont_info = (struct xftfont_info *) font; |
| 505 | XGlyphInfo extents; |
| 506 | |
| 507 | BLOCK_INPUT; |
| 508 | XftGlyphExtents (xftfont_info->display, xftfont_info->xftfont, code, nglyphs, |
| 509 | &extents); |
| 510 | UNBLOCK_INPUT; |
| 511 | if (metrics) |
| 512 | { |
| 513 | metrics->lbearing = - extents.x; |
| 514 | metrics->rbearing = - extents.x + extents.width; |
| 515 | metrics->width = extents.xOff; |
| 516 | metrics->ascent = extents.y; |
| 517 | metrics->descent = extents.height - extents.y; |
| 518 | } |
| 519 | return extents.xOff; |
| 520 | } |
| 521 | |
| 522 | static XftDraw * |
| 523 | xftfont_get_xft_draw (f) |
| 524 | FRAME_PTR f; |
| 525 | { |
| 526 | XftDraw *xft_draw = font_get_frame_data (f, &xftfont_driver); |
| 527 | |
| 528 | if (! xft_draw) |
| 529 | { |
| 530 | BLOCK_INPUT; |
| 531 | xft_draw= XftDrawCreate (FRAME_X_DISPLAY (f), |
| 532 | FRAME_X_WINDOW (f), |
| 533 | FRAME_X_VISUAL (f), |
| 534 | FRAME_X_COLORMAP (f)); |
| 535 | UNBLOCK_INPUT; |
| 536 | if (! xft_draw) |
| 537 | abort (); |
| 538 | font_put_frame_data (f, &xftfont_driver, xft_draw); |
| 539 | } |
| 540 | return xft_draw; |
| 541 | } |
| 542 | |
| 543 | static int |
| 544 | xftfont_draw (s, from, to, x, y, with_background) |
| 545 | struct glyph_string *s; |
| 546 | int from, to, x, y, with_background; |
| 547 | { |
| 548 | FRAME_PTR f = s->f; |
| 549 | struct face *face = s->face; |
| 550 | struct xftfont_info *xftfont_info = (struct xftfont_info *) s->font; |
| 551 | struct xftface_info *xftface_info = NULL; |
| 552 | XftDraw *xft_draw = xftfont_get_xft_draw (f); |
| 553 | FT_UInt *code; |
| 554 | XftColor fg, bg; |
| 555 | int len = to - from; |
| 556 | int i; |
| 557 | |
| 558 | if (s->font == face->font) |
| 559 | xftface_info = (struct xftface_info *) face->extra; |
| 560 | xftfont_get_colors (f, face, s->gc, xftface_info, |
| 561 | &fg, with_background ? &bg : NULL); |
| 562 | BLOCK_INPUT; |
| 563 | if (s->num_clips > 0) |
| 564 | XftDrawSetClipRectangles (xft_draw, 0, 0, s->clip, s->num_clips); |
| 565 | else |
| 566 | XftDrawSetClip (xft_draw, NULL); |
| 567 | |
| 568 | if (with_background) |
| 569 | XftDrawRect (xft_draw, &bg, |
| 570 | x, y - face->font->ascent, s->width, face->font->height); |
| 571 | code = alloca (sizeof (FT_UInt) * len); |
| 572 | for (i = 0; i < len; i++) |
| 573 | code[i] = ((XCHAR2B_BYTE1 (s->char2b + from + i) << 8) |
| 574 | | XCHAR2B_BYTE2 (s->char2b + from + i)); |
| 575 | |
| 576 | if (s->padding_p) |
| 577 | for (i = 0; i < len; i++) |
| 578 | XftDrawGlyphs (xft_draw, &fg, xftfont_info->xftfont, |
| 579 | x + i, y, code + i, 1); |
| 580 | else |
| 581 | XftDrawGlyphs (xft_draw, &fg, xftfont_info->xftfont, |
| 582 | x, y, code, len); |
| 583 | UNBLOCK_INPUT; |
| 584 | |
| 585 | return len; |
| 586 | } |
| 587 | |
| 588 | static int |
| 589 | xftfont_end_for_frame (f) |
| 590 | FRAME_PTR f; |
| 591 | { |
| 592 | XftDraw *xft_draw = font_get_frame_data (f, &xftfont_driver); |
| 593 | |
| 594 | if (xft_draw) |
| 595 | { |
| 596 | BLOCK_INPUT; |
| 597 | XftDrawDestroy (xft_draw); |
| 598 | UNBLOCK_INPUT; |
| 599 | font_put_frame_data (f, &xftfont_driver, NULL); |
| 600 | } |
| 601 | return 0; |
| 602 | } |
| 603 | |
| 604 | void |
| 605 | syms_of_xftfont () |
| 606 | { |
| 607 | DEFSYM (Qxft, "xft"); |
| 608 | DEFSYM (QChinting, ":hinting"); |
| 609 | DEFSYM (QCautohint, ":autohint"); |
| 610 | DEFSYM (QChintstyle, ":hintstyle"); |
| 611 | DEFSYM (QCrgba, ":rgba"); |
| 612 | DEFSYM (QCembolden, ":embolden"); |
| 613 | |
| 614 | xftfont_driver = ftfont_driver; |
| 615 | xftfont_driver.type = Qxft; |
| 616 | xftfont_driver.get_cache = xfont_driver.get_cache; |
| 617 | xftfont_driver.list = xftfont_list; |
| 618 | xftfont_driver.match = xftfont_match; |
| 619 | xftfont_driver.open = xftfont_open; |
| 620 | xftfont_driver.close = xftfont_close; |
| 621 | xftfont_driver.prepare_face = xftfont_prepare_face; |
| 622 | xftfont_driver.done_face = xftfont_done_face; |
| 623 | xftfont_driver.has_char = xftfont_has_char; |
| 624 | xftfont_driver.encode_char = xftfont_encode_char; |
| 625 | xftfont_driver.text_extents = xftfont_text_extents; |
| 626 | xftfont_driver.draw = xftfont_draw; |
| 627 | xftfont_driver.end_for_frame = xftfont_end_for_frame; |
| 628 | |
| 629 | register_font_driver (&xftfont_driver, NULL); |
| 630 | } |
| 631 | |
| 632 | /* arch-tag: 64ec61bf-7c8e-4fe6-b953-c6a85d5e1605 |
| 633 | (do not change this comment) */ |