src/xftfont.c

   1 /* xftfont.c -- XFT font driver.
   2    Copyright (C) 2006, 2007, 2008 Free Software Foundation, Inc.
   3    Copyright (C) 2006, 2007, 2008
   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   Display *display;
  50   int screen;
  51   XftFont *xftfont;
  52 #ifdef HAVE_LIBOTF
  53   int maybe_otf;          /* Flag to tell if this may be OTF or not.  */
  54   OTF *otf;
  55 #endif  /* HAVE_LIBOTF */
  56 };
  57
  58 /* Structure pointed by (struct face *)->extra  */
  59
  60 struct xftface_info
  61 {
  62   XftColor xft_fg;              /* color for face->foreground */
  63   XftColor xft_bg;              /* color for face->background */
  64 };
  65
  66 static void xftfont_get_colors P_ ((FRAME_PTR, struct face *, GC gc,
  67                                     struct xftface_info *,
  68                                     XftColor *fg, XftColor *bg));
  69
  70
  71 /* Setup foreground and background colors of GC into FG and BG.  If
  72    XFTFACE_INFO is not NULL, reuse the colors in it if possible.  BG
  73    may be NULL.  */
  74
  75 static void
  76 xftfont_get_colors (f, face, gc, xftface_info, fg, bg)
  77      FRAME_PTR f;
  78      struct face *face;
  79      GC gc;
  80      struct xftface_info *xftface_info;
  81      XftColor *fg, *bg;
  82 {
  83   if (xftface_info && face->gc == gc)
  84     {
  85       *fg = xftface_info->xft_fg;
  86       if (bg)
  87         *bg = xftface_info->xft_bg;
  88     }
  89   else
  90     {
  91       XGCValues xgcv;
  92       int fg_done = 0, bg_done = 0;
  93
  94       BLOCK_INPUT;
  95       XGetGCValues (FRAME_X_DISPLAY (f), gc,
  96                     GCForeground | GCBackground, &xgcv);
  97       if (xftface_info)
  98         {
  99           if (xgcv.foreground == face->foreground)
 100             *fg = xftface_info->xft_fg, fg_done = 1;
 101           else if (xgcv.foreground == face->background)
 102             *fg = xftface_info->xft_bg, fg_done = 1;
 103           if (! bg)
 104             bg_done = 1;
 105           else if (xgcv.background == face->background)
 106             *bg = xftface_info->xft_bg, bg_done = 1;
 107           else if (xgcv.background == face->foreground)
 108             *bg = xftface_info->xft_fg, bg_done = 1;
 109         }
 110
 111       if (fg_done + bg_done < 2)
 112         {
 113           XColor colors[2];
 114
 115           colors[0].pixel = fg->pixel = xgcv.foreground;
 116           if (bg)
 117             colors[1].pixel = bg->pixel = xgcv.background;
 118           XQueryColors (FRAME_X_DISPLAY (f), FRAME_X_COLORMAP (f), colors,
 119                         bg ? 2 : 1);
 120           fg->color.alpha = 0xFFFF;
 121           fg->color.red = colors[0].red;
 122           fg->color.green = colors[0].green;
 123           fg->color.blue = colors[0].blue;
 124           if (bg)
 125             {
 126               bg->color.alpha = 0xFFFF;
 127               bg->color.red = colors[1].red;
 128               bg->color.green = colors[1].green;
 129               bg->color.blue = colors[1].blue;
 130             }
 131         }
 132       UNBLOCK_INPUT;
 133     }
 134 }
 135
 136
 137 static Lisp_Object xftfont_list P_ ((Lisp_Object, Lisp_Object));
 138 static Lisp_Object xftfont_match P_ ((Lisp_Object, Lisp_Object));
 139 static Lisp_Object xftfont_open P_ ((FRAME_PTR, Lisp_Object, int));
 140 static void xftfont_close P_ ((FRAME_PTR, struct font *));
 141 static int xftfont_prepare_face P_ ((FRAME_PTR, struct face *));
 142 static void xftfont_done_face P_ ((FRAME_PTR, struct face *));
 143 static unsigned xftfont_encode_char P_ ((struct font *, int));
 144 static int xftfont_text_extents P_ ((struct font *, unsigned *, int,
 145                                      struct font_metrics *));
 146 static int xftfont_draw P_ ((struct glyph_string *, int, int, int, int, int));
 147
 148 static int xftfont_anchor_point P_ ((struct font *, unsigned, int,
 149                                      int *, int *));
 150 static int xftfont_end_for_frame P_ ((FRAME_PTR f));
 151
 152 struct font_driver xftfont_driver;
 153
 154 static Lisp_Object
 155 xftfont_list (frame, spec)
 156      Lisp_Object frame;
 157      Lisp_Object spec;
 158 {
 159   Lisp_Object list = ftfont_driver.list (frame, spec), tail;
 160
 161   for (tail = list; CONSP (tail); tail = XCDR (tail))
 162     ASET (XCAR (tail), FONT_TYPE_INDEX, Qxft);
 163   return list;
 164 }
 165
 166 static Lisp_Object
 167 xftfont_match (frame, spec)
 168      Lisp_Object frame;
 169      Lisp_Object spec;
 170 {
 171   Lisp_Object entity = ftfont_driver.match (frame, spec);
 172
 173   if (! NILP (entity))
 174     ASET (entity, FONT_TYPE_INDEX, Qxft);
 175   return entity;
 176 }
 177
 178 extern Lisp_Object ftfont_font_format P_ ((FcPattern *));
 179 extern Lisp_Object QCantialias;
 180
 181 static FcChar8 ascii_printable[95];
 182
 183 static Lisp_Object
 184 xftfont_open (f, entity, pixel_size)
 185      FRAME_PTR f;
 186      Lisp_Object entity;
 187      int pixel_size;
 188 {
 189   FcResult result;
 190   Display *display = FRAME_X_DISPLAY (f);
 191   Lisp_Object val, filename, tail, font_object;
 192   FcPattern *pat = NULL, *match;
 193   struct xftfont_info *xftfont_info = NULL;
 194   struct font *font;
 195   double size = 0;
 196   XftFont *xftfont = NULL;
 197   int spacing;
 198   char name[256];
 199   int len, i;
 200   XGlyphInfo extents;
 201   FT_Face ft_face;
 202
 203   val = assq_no_quit (QCfont_entity, AREF (entity, FONT_EXTRA_INDEX));
 204   if (! CONSP (val))
 205     return Qnil;
 206   val = XCDR (val);
 207   filename = XCAR (val);
 208   size = XINT (AREF (entity, FONT_SIZE_INDEX));
 209   if (size == 0)
 210     size = pixel_size;
 211   pat = FcPatternCreate ();
 212   FcPatternAddString (pat, FC_FILE, (FcChar8 *) SDATA (filename));
 213   FcPatternAddInteger (pat, FC_WEIGHT, FONT_WEIGHT_NUMERIC (entity));
 214   i = FONT_SLANT_NUMERIC (entity) - 100;
 215   if (i < 0) i = 0;
 216   FcPatternAddInteger (pat, FC_SLANT, i);
 217   FcPatternAddInteger (pat, FC_WIDTH, FONT_WIDTH_NUMERIC (entity));
 218   FcPatternAddDouble (pat, FC_PIXEL_SIZE, pixel_size);
 219   val = AREF (entity, FONT_FAMILY_INDEX);
 220   if (! NILP (val))
 221     FcPatternAddString (pat, FC_FAMILY, (FcChar8 *) SDATA (SYMBOL_NAME (val)));
 222   val = AREF (entity, FONT_FOUNDRY_INDEX);
 223   if (! NILP (val))
 224     FcPatternAddString (pat, FC_FOUNDRY, (FcChar8 *) SDATA (SYMBOL_NAME (val)));
 225   val = AREF (entity, FONT_SPACING_INDEX);
 226   if (! NILP (val))
 227     FcPatternAddInteger (pat, FC_SPACING, XINT (val));
 228   val = AREF (entity, FONT_DPI_INDEX);
 229   if (! NILP (val))
 230     {
 231       double dbl = XINT (val);
 232
 233       FcPatternAddDouble (pat, FC_DPI, dbl);
 234     }
 235   val = AREF (entity, FONT_AVGWIDTH_INDEX);
 236   if (INTEGERP (val) && XINT (val) == 0)
 237     FcPatternAddBool (pat, FC_SCALABLE, FcTrue);
 238
 239   for (tail = AREF (entity, FONT_EXTRA_INDEX); CONSP (tail); tail = XCDR (tail))
 240     {
 241       Lisp_Object key, val;
 242
 243       key = XCAR (XCAR (tail)), val = XCDR (XCAR (tail));
 244       if (EQ (key, QCantialias))
 245         FcPatternAddBool (pat, FC_ANTIALIAS, NILP (val) ? FcFalse : FcTrue);
 246       else if (EQ (key, QChinting))
 247         FcPatternAddBool (pat, FC_HINTING, NILP (val) ? FcFalse : FcTrue);
 248       else if (EQ (key, QCautohint))
 249         FcPatternAddBool (pat, FC_AUTOHINT, NILP (val) ? FcFalse : FcTrue);
 250       else if (EQ (key, QChintstyle))
 251         {
 252           if (INTEGERP (val))
 253             FcPatternAddInteger (pat, FC_RGBA, XINT (val));
 254         }
 255       else if (EQ (key, QCrgba))
 256         {
 257           if (INTEGERP (val))
 258             FcPatternAddInteger (pat, FC_RGBA, XINT (val));
 259         }
 260       else if (EQ (key, QCembolden))
 261         FcPatternAddBool (pat, FC_EMBOLDEN, NILP (val) ? FcFalse : FcTrue);
 262     }
 263   FcConfigSubstitute (NULL, pat, FcMatchPattern);
 264
 265   BLOCK_INPUT;
 266   XftDefaultSubstitute (display, FRAME_X_SCREEN_NUMBER (f), pat);
 267   match = XftFontMatch (display, FRAME_X_SCREEN_NUMBER (f), pat, &result);
 268   FcPatternDestroy (pat);
 269   xftfont = XftFontOpenPattern (display, match);
 270   UNBLOCK_INPUT;
 271
 272   if (! xftfont)
 273     return Qnil;
 274   /* We should not destroy PAT here because it is kept in XFTFONT and
 275      destroyed automatically when XFTFONT is closed.  */
 276   font_object = font_make_object (VECSIZE (struct xftfont_info));
 277   ASET (font_object, FONT_TYPE_INDEX, Qxft);
 278   for (i = 1; i < FONT_ENTITY_MAX; i++)
 279     ASET (font_object, i, AREF (entity, i));
 280   ASET (font_object, FONT_SIZE_INDEX, make_number (size));
 281   len = font_unparse_xlfd (entity, size, name, 256);
 282   if (len > 0)
 283     ASET (font_object, FONT_NAME_INDEX, make_unibyte_string (name, len));
 284   len = font_unparse_fcname (entity, size, name, 256);
 285   if (len > 0)
 286     ASET (font_object, FONT_FULLNAME_INDEX, make_unibyte_string (name, len));
 287   else
 288     ASET (font_object, FONT_FULLNAME_INDEX,
 289           AREF (font_object, FONT_NAME_INDEX));
 290   ASET (font_object, FONT_FILE_INDEX, filename);
 291   ASET (font_object, FONT_FORMAT_INDEX,
 292         ftfont_font_format (xftfont->pattern));
 293   font = XFONT_OBJECT (font_object);
 294   font->pixel_size = pixel_size;
 295   font->driver = &xftfont_driver;
 296   font->encoding_charset = font->repertory_charset = -1;
 297
 298   xftfont_info = (struct xftfont_info *) font;
 299   xftfont_info->display = display;
 300   xftfont_info->screen = FRAME_X_SCREEN_NUMBER (f);
 301   xftfont_info->xftfont = xftfont;
 302   font->pixel_size = size;
 303   font->driver = &xftfont_driver;
 304   if (INTEGERP (AREF (entity, FONT_SPACING_INDEX)))
 305     spacing = XINT (AREF (entity, FONT_SPACING_INDEX));
 306   else
 307     spacing = FC_PROPORTIONAL;
 308   if (! ascii_printable[0])
 309     {
 310       int i;
 311       for (i = 0; i < 95; i++)
 312         ascii_printable[i] = ' ' + i;
 313     }
 314   BLOCK_INPUT;
 315   if (spacing != FC_PROPORTIONAL)
 316     {
 317       font->min_width = font->average_width = font->space_width
 318         = xftfont->max_advance_width;
 319       XftTextExtents8 (display, xftfont, ascii_printable + 1, 94, &extents);
 320     }
 321   else
 322     {
 323       XftTextExtents8 (display, xftfont, ascii_printable, 1, &extents);
 324       font->space_width = extents.xOff;
 325       if (font->space_width <= 0)
 326         /* dirty workaround */
 327         font->space_width = pixel_size;
 328       XftTextExtents8 (display, xftfont, ascii_printable + 1, 94, &extents);
 329       font->average_width = (font->space_width + extents.xOff) / 95;
 330     }
 331   UNBLOCK_INPUT;
 332
 333   font->ascent = xftfont->ascent;
 334   font->descent = xftfont->descent;
 335   if (pixel_size >= 5)
 336     {
 337       /* The above condition is a dirty workaround because
 338          XftTextExtents8 behaves strangely for some fonts
 339          (e.g. "Dejavu Sans Mono") when pixel_size is less than 5. */
 340       if (font->ascent < extents.y)
 341         font->ascent = extents.y;
 342       if (font->descent < extents.height - extents.y)
 343         font->descent = extents.height - extents.y;
 344     }
 345   font->height = font->ascent + font->descent;
 346
 347   ft_face = XftLockFace (xftfont);
 348   if (XINT (AREF (entity, FONT_SIZE_INDEX)) == 0)
 349     {
 350       int upEM = ft_face->units_per_EM;
 351
 352       font->underline_position = -ft_face->underline_position * size / upEM;
 353       font->underline_thickness = -ft_face->underline_thickness * size / upEM;
 354       if (font->underline_thickness > 2)
 355         font->underline_position -= font->underline_thickness / 2;
 356     }
 357   else
 358     {
 359       font->underline_position = -1;
 360       font->underline_thickness = 0;
 361     }
 362 #ifdef HAVE_LIBOTF
 363   xftfont_info->maybe_otf = ft_face->face_flags & FT_FACE_FLAG_SFNT;
 364   xftfont_info->otf = NULL;
 365 #endif  /* HAVE_LIBOTF */
 366   XftUnlockFace (xftfont);
 367
 368   /* Unfortunately Xft doesn't provide a way to get minimum char
 369      width.  So, we use space_width instead.  */
 370   font->min_width = font->space_width;
 371
 372   font->baseline_offset = 0;
 373   font->relative_compose = 0;
 374   font->default_ascent = 0;
 375   font->vertical_centering = 0;
 376
 377   return font_object;
 378 }
 379
 380 static void
 381 xftfont_close (f, font)
 382      FRAME_PTR f;
 383      struct font *font;
 384 {
 385   struct xftfont_info *xftfont_info = (struct xftfont_info *) font;
 386
 387 #ifdef HAVE_LIBOTF
 388   if (xftfont_info->otf)
 389     OTF_close (xftfont_info->otf);
 390 #endif
 391   BLOCK_INPUT;
 392   XftFontClose (xftfont_info->display, xftfont_info->xftfont);
 393   UNBLOCK_INPUT;
 394 }
 395
 396 static int
 397 xftfont_prepare_face (f, face)
 398      FRAME_PTR f;
 399      struct face *face;
 400 {
 401   struct xftface_info *xftface_info;
 402
 403 #if 0
 404   /* This doesn't work if face->ascii_face doesn't use an Xft font. */
 405   if (face != face->ascii_face)
 406     {
 407       face->extra = face->ascii_face->extra;
 408       return 0;
 409     }
 410 #endif
 411
 412   xftface_info = malloc (sizeof (struct xftface_info));
 413   if (! xftface_info)
 414     return -1;
 415   xftfont_get_colors (f, face, face->gc, NULL,
 416                       &xftface_info->xft_fg, &xftface_info->xft_bg);
 417   face->extra = xftface_info;
 418   return 0;
 419 }
 420
 421 static void
 422 xftfont_done_face (f, face)
 423      FRAME_PTR f;
 424      struct face *face;
 425 {
 426   struct xftface_info *xftface_info;
 427
 428 #if 0
 429   /* This doesn't work if face->ascii_face doesn't use an Xft font. */
 430   if (face != face->ascii_face
 431       || ! face->extra)
 432     return;
 433 #endif
 434
 435   xftface_info = (struct xftface_info *) face->extra;
 436   if (xftface_info)
 437     {
 438       free (xftface_info);
 439       face->extra = NULL;
 440     }
 441 }
 442
 443 static unsigned
 444 xftfont_encode_char (font, c)
 445      struct font *font;
 446      int c;
 447 {
 448   struct xftfont_info *xftfont_info = (struct xftfont_info *) font;
 449   unsigned code = XftCharIndex (xftfont_info->display, xftfont_info->xftfont,
 450                                 (FcChar32) c);
 451
 452   return (code ? code : FONT_INVALID_CODE);
 453 }
 454
 455 static int
 456 xftfont_text_extents (font, code, nglyphs, metrics)
 457      struct font *font;
 458      unsigned *code;
 459      int nglyphs;
 460      struct font_metrics *metrics;
 461 {
 462   struct xftfont_info *xftfont_info = (struct xftfont_info *) font;
 463   XGlyphInfo extents;
 464
 465   BLOCK_INPUT;
 466   XftGlyphExtents (xftfont_info->display, xftfont_info->xftfont, code, nglyphs,
 467                    &extents);
 468   UNBLOCK_INPUT;
 469   if (metrics)
 470     {
 471       metrics->lbearing = - extents.x;
 472       metrics->rbearing = - extents.x + extents.width;
 473       metrics->width = extents.xOff;
 474       metrics->ascent = extents.y;
 475       metrics->descent = extents.height - extents.y;
 476     }
 477   return extents.xOff;
 478 }
 479
 480 static XftDraw *
 481 xftfont_get_xft_draw (f)
 482      FRAME_PTR f;
 483 {
 484   XftDraw *xft_draw = font_get_frame_data (f, &xftfont_driver);;
 485
 486   if (! xft_draw)
 487     {
 488       BLOCK_INPUT;
 489       xft_draw= XftDrawCreate (FRAME_X_DISPLAY (f),
 490                                FRAME_X_WINDOW (f),
 491                                FRAME_X_VISUAL (f),
 492                                FRAME_X_COLORMAP (f));
 493       UNBLOCK_INPUT;
 494       if (! xft_draw)
 495         abort ();
 496       font_put_frame_data (f, &xftfont_driver, xft_draw);
 497     }
 498   return xft_draw;
 499 }
 500
 501 static int
 502 xftfont_draw (s, from, to, x, y, with_background)
 503      struct glyph_string *s;
 504      int from, to, x, y, with_background;
 505 {
 506   FRAME_PTR f = s->f;
 507   struct face *face = s->face;
 508   struct xftfont_info *xftfont_info = (struct xftfont_info *) s->font;
 509   struct xftface_info *xftface_info = NULL;
 510   XftDraw *xft_draw = xftfont_get_xft_draw (f);
 511   FT_UInt *code;
 512   XftColor fg, bg;
 513   int len = to - from;
 514   int i;
 515
 516   if (s->font == face->font)
 517     xftface_info = (struct xftface_info *) face->extra;
 518   xftfont_get_colors (f, face, s->gc, xftface_info,
 519                       &fg, with_background ? &bg : NULL);
 520   BLOCK_INPUT;
 521   if (s->num_clips > 0)
 522     XftDrawSetClipRectangles (xft_draw, 0, 0, s->clip, s->num_clips);
 523   else
 524     XftDrawSetClip (xft_draw, NULL);
 525
 526   if (with_background)
 527     XftDrawRect (xft_draw, &bg,
 528                  x, y - face->font->ascent, s->width, face->font->height);
 529   code = alloca (sizeof (FT_UInt) * len);
 530   for (i = 0; i < len; i++)
 531     code[i] = ((XCHAR2B_BYTE1 (s->char2b + from + i) << 8)
 532                | XCHAR2B_BYTE2 (s->char2b + from + i));
 533
 534   if (s->padding_p)
 535     for (i = 0; i < len; i++)
 536       XftDrawGlyphs (xft_draw, &fg, xftfont_info->xftfont,
 537                      x + i, y, code + i, 1);
 538   else
 539     XftDrawGlyphs (xft_draw, &fg, xftfont_info->xftfont,
 540                    x, y, code, len);
 541   UNBLOCK_INPUT;
 542
 543   return len;
 544 }
 545
 546 static int
 547 xftfont_anchor_point (font, code, index, x, y)
 548      struct font *font;
 549      unsigned code;
 550      int index;
 551      int *x, *y;
 552 {
 553   struct xftfont_info *xftfont_info = (struct xftfont_info *) font;
 554   FT_Face ft_face = XftLockFace (xftfont_info->xftfont);
 555   int result;
 556
 557   if (FT_Load_Glyph (ft_face, code, FT_LOAD_DEFAULT) != 0)
 558     result = -1;
 559   else if (ft_face->glyph->format != FT_GLYPH_FORMAT_OUTLINE)
 560     result = -1;
 561   else if (index >= ft_face->glyph->outline.n_points)
 562     result = -1;
 563   else
 564     {
 565       *x = ft_face->glyph->outline.points[index].x;
 566       *y = ft_face->glyph->outline.points[index].y;
 567     }
 568   XftUnlockFace (xftfont_info->xftfont);
 569   return result;
 570 }
 571
 572 static int
 573 xftfont_end_for_frame (f)
 574      FRAME_PTR f;
 575 {
 576   XftDraw *xft_draw = font_get_frame_data (f, &xftfont_driver);
 577
 578   if (xft_draw)
 579     {
 580       BLOCK_INPUT;
 581       XftDrawDestroy (xft_draw);
 582       UNBLOCK_INPUT;
 583       font_put_frame_data (f, &xftfont_driver, NULL);
 584     }
 585   return 0;
 586 }
 587
 588 #ifdef HAVE_LIBOTF
 589 #ifdef HAVE_M17N_FLT
 590 static Lisp_Object
 591 xftfont_shape (lgstring)
 592      Lisp_Object lgstring;
 593 {
 594   struct font *font;
 595   struct xftfont_info *xftfont_info;
 596   Lisp_Object result;
 597   FT_Face ft_face;
 598
 599   CHECK_FONT_GET_OBJECT (LGSTRING_FONT (lgstring), font);
 600   xftfont_info = (struct xftfont_info *) font;
 601   if (! xftfont_info->maybe_otf)
 602     return Qnil;
 603   ft_face = XftLockFace (xftfont_info->xftfont);
 604   if (! xftfont_info->otf)
 605     {
 606       OTF *otf = OTF_open_ft_face (ft_face);
 607
 608       if (! otf || OTF_get_table (otf, "head") < 0)
 609         {
 610           if (otf)
 611             OTF_close (otf);
 612           xftfont_info->maybe_otf = 0;
 613           XftUnlockFace (xftfont_info->xftfont);
 614           return Qnil;
 615         }
 616       xftfont_info->otf = otf;
 617     }
 618
 619   result = ftfont_shape_by_flt (lgstring, font, ft_face, xftfont_info->otf);
 620   XftUnlockFace (xftfont_info->xftfont);
 621   return result;
 622 }
 623 #endif  /* HAVE_M17N_FLT */
 624 #endif  /* HAVE_LIBOTF */
 625
 626 void
 627 syms_of_xftfont ()
 628 {
 629   DEFSYM (Qxft, "xft");
 630   DEFSYM (QChinting, ":hinting");
 631   DEFSYM (QCautohint, ":autohing");
 632   DEFSYM (QChintstyle, ":hintstyle");
 633   DEFSYM (QCrgba, ":rgba");
 634   DEFSYM (QCembolden, ":embolden");
 635
 636   xftfont_driver = ftfont_driver;
 637   xftfont_driver.type = Qxft;
 638   xftfont_driver.get_cache = xfont_driver.get_cache;
 639   xftfont_driver.list = xftfont_list;
 640   xftfont_driver.match = xftfont_match;
 641   xftfont_driver.open = xftfont_open;
 642   xftfont_driver.close = xftfont_close;
 643   xftfont_driver.prepare_face = xftfont_prepare_face;
 644   xftfont_driver.done_face = xftfont_done_face;
 645   xftfont_driver.encode_char = xftfont_encode_char;
 646   xftfont_driver.text_extents = xftfont_text_extents;
 647   xftfont_driver.draw = xftfont_draw;
 648   xftfont_driver.anchor_point = xftfont_anchor_point;
 649   xftfont_driver.end_for_frame = xftfont_end_for_frame;
 650 #ifdef HAVE_LIBOTF
 651 #ifdef HAVE_M17N_FLT
 652   xftfont_driver.shape = xftfont_shape;
 653 #endif  /* HAVE_M17N_FLT */
 654 #endif  /* HAVE_LIBOTF */
 655
 656   register_font_driver (&xftfont_driver, NULL);
 657 }
 658
 659 /* arch-tag: 64ec61bf-7c8e-4fe6-b953-c6a85d5e1605
 660    (do not change this comment) */