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 *, Lisp_Object));
 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   FcPatternAddInteger (pat, FC_WEIGHT, FONT_WEIGHT_NUMERIC (entity));
 213   i = FONT_SLANT_NUMERIC (entity) - 100;
 214   if (i < 0) i = 0;
 215   FcPatternAddInteger (pat, FC_SLANT, i);
 216   FcPatternAddInteger (pat, FC_WIDTH, FONT_WIDTH_NUMERIC (entity));
 217   FcPatternAddDouble (pat, FC_PIXEL_SIZE, pixel_size);
 218   val = AREF (entity, FONT_FAMILY_INDEX);
 219   if (! NILP (val))
 220     FcPatternAddString (pat, FC_FAMILY, (FcChar8 *) SDATA (SYMBOL_NAME (val)));
 221   val = AREF (entity, FONT_FOUNDRY_INDEX);
 222   if (! NILP (val))
 223     FcPatternAddString (pat, FC_FOUNDRY, (FcChar8 *) SDATA (SYMBOL_NAME (val)));
 224   val = AREF (entity, FONT_SPACING_INDEX);
 225   if (! NILP (val))
 226     FcPatternAddInteger (pat, FC_SPACING, XINT (val));
 227   val = AREF (entity, FONT_DPI_INDEX);
 228   if (! NILP (val))
 229     {
 230       double dbl = XINT (val);
 231
 232       FcPatternAddDouble (pat, FC_DPI, dbl);
 233     }
 234   val = AREF (entity, FONT_AVGWIDTH_INDEX);
 235   if (INTEGERP (val) && XINT (val) == 0)
 236     FcPatternAddBool (pat, FC_SCALABLE, FcTrue);
 237
 238   for (tail = AREF (entity, FONT_EXTRA_INDEX); CONSP (tail); tail = XCDR (tail))
 239     {
 240       Lisp_Object key, val;
 241
 242       key = XCAR (XCAR (tail)), val = XCDR (XCAR (tail));
 243       if (EQ (key, QCantialias))
 244         FcPatternAddBool (pat, FC_ANTIALIAS, NILP (val) ? FcFalse : FcTrue);
 245       else if (EQ (key, QChinting))
 246         FcPatternAddBool (pat, FC_HINTING, NILP (val) ? FcFalse : FcTrue);
 247       else if (EQ (key, QCautohint))
 248         FcPatternAddBool (pat, FC_AUTOHINT, NILP (val) ? FcFalse : FcTrue);
 249       else if (EQ (key, QChintstyle))
 250         {
 251           if (INTEGERP (val))
 252             FcPatternAddInteger (pat, FC_RGBA, XINT (val));
 253         }
 254       else if (EQ (key, QCrgba))
 255         {
 256           if (INTEGERP (val))
 257             FcPatternAddInteger (pat, FC_RGBA, XINT (val));
 258         }
 259 #ifdef FC_EMBOLDEN
 260       else if (EQ (key, QCembolden))
 261         FcPatternAddBool (pat, FC_EMBOLDEN, NILP (val) ? FcFalse : FcTrue);
 262 #endif
 263     }
 264
 265   BLOCK_INPUT;
 266   match = XftFontMatch (display, FRAME_X_SCREEN_NUMBER (f), pat, &result);
 267   FcPatternDestroy (pat);
 268   FcPatternDel (match, FC_FILE);
 269   FcPatternAddString (match, FC_FILE, (FcChar8 *) SDATA (filename));
 270   xftfont = XftFontOpenPattern (display, match);
 271   UNBLOCK_INPUT;
 272
 273   if (! xftfont)
 274     return Qnil;
 275   /* We should not destroy PAT here because it is kept in XFTFONT and
 276      destroyed automatically when XFTFONT is closed.  */
 277   font_object = font_make_object (VECSIZE (struct xftfont_info));
 278   ASET (font_object, FONT_TYPE_INDEX, Qxft);
 279   for (i = 1; i < FONT_ENTITY_MAX; i++)
 280     ASET (font_object, i, AREF (entity, i));
 281   ASET (font_object, FONT_SIZE_INDEX, make_number (size));
 282   len = font_unparse_xlfd (entity, size, name, 256);
 283   if (len > 0)
 284     ASET (font_object, FONT_NAME_INDEX, make_unibyte_string (name, len));
 285   len = font_unparse_fcname (entity, size, name, 256);
 286   if (len > 0)
 287     ASET (font_object, FONT_FULLNAME_INDEX, make_unibyte_string (name, len));
 288   else
 289     ASET (font_object, FONT_FULLNAME_INDEX,
 290           AREF (font_object, FONT_NAME_INDEX));
 291   ASET (font_object, FONT_FILE_INDEX, filename);
 292   ASET (font_object, FONT_FORMAT_INDEX,
 293         ftfont_font_format (xftfont->pattern, filename));
 294   font = XFONT_OBJECT (font_object);
 295   font->pixel_size = pixel_size;
 296   font->driver = &xftfont_driver;
 297   font->encoding_charset = font->repertory_charset = -1;
 298
 299   xftfont_info = (struct xftfont_info *) font;
 300   xftfont_info->display = display;
 301   xftfont_info->screen = FRAME_X_SCREEN_NUMBER (f);
 302   xftfont_info->xftfont = xftfont;
 303   font->pixel_size = size;
 304   font->driver = &xftfont_driver;
 305   if (INTEGERP (AREF (entity, FONT_SPACING_INDEX)))
 306     spacing = XINT (AREF (entity, FONT_SPACING_INDEX));
 307   else
 308     spacing = FC_PROPORTIONAL;
 309   if (! ascii_printable[0])
 310     {
 311       int i;
 312       for (i = 0; i < 95; i++)
 313         ascii_printable[i] = ' ' + i;
 314     }
 315   BLOCK_INPUT;
 316   if (spacing != FC_PROPORTIONAL)
 317     {
 318       font->min_width = font->average_width = font->space_width
 319         = xftfont->max_advance_width;
 320       XftTextExtents8 (display, xftfont, ascii_printable + 1, 94, &extents);
 321     }
 322   else
 323     {
 324       XftTextExtents8 (display, xftfont, ascii_printable, 1, &extents);
 325       font->space_width = extents.xOff;
 326       if (font->space_width <= 0)
 327         /* dirty workaround */
 328         font->space_width = pixel_size;
 329       XftTextExtents8 (display, xftfont, ascii_printable + 1, 94, &extents);
 330       font->average_width = (font->space_width + extents.xOff) / 95;
 331     }
 332   UNBLOCK_INPUT;
 333
 334   font->ascent = xftfont->ascent;
 335   font->descent = xftfont->descent;
 336   if (pixel_size >= 5)
 337     {
 338       /* The above condition is a dirty workaround because
 339          XftTextExtents8 behaves strangely for some fonts
 340          (e.g. "Dejavu Sans Mono") when pixel_size is less than 5. */
 341       if (font->ascent < extents.y)
 342         font->ascent = extents.y;
 343       if (font->descent < extents.height - extents.y)
 344         font->descent = extents.height - extents.y;
 345     }
 346   font->height = font->ascent + font->descent;
 347
 348   ft_face = XftLockFace (xftfont);
 349   if (XINT (AREF (entity, FONT_SIZE_INDEX)) == 0)
 350     {
 351       int upEM = ft_face->units_per_EM;
 352
 353       font->underline_position = -ft_face->underline_position * size / upEM;
 354       font->underline_thickness = -ft_face->underline_thickness * size / upEM;
 355       if (font->underline_thickness > 2)
 356         font->underline_position -= font->underline_thickness / 2;
 357     }
 358   else
 359     {
 360       font->underline_position = -1;
 361       font->underline_thickness = 0;
 362     }
 363 #ifdef HAVE_LIBOTF
 364   xftfont_info->maybe_otf = ft_face->face_flags & FT_FACE_FLAG_SFNT;
 365   xftfont_info->otf = NULL;
 366 #endif  /* HAVE_LIBOTF */
 367   XftUnlockFace (xftfont);
 368
 369   /* Unfortunately Xft doesn't provide a way to get minimum char
 370      width.  So, we use space_width instead.  */
 371   font->min_width = font->space_width;
 372
 373   font->baseline_offset = 0;
 374   font->relative_compose = 0;
 375   font->default_ascent = 0;
 376   font->vertical_centering = 0;
 377
 378   return font_object;
 379 }
 380
 381 static void
 382 xftfont_close (f, font)
 383      FRAME_PTR f;
 384      struct font *font;
 385 {
 386   struct xftfont_info *xftfont_info = (struct xftfont_info *) font;
 387
 388 #ifdef HAVE_LIBOTF
 389   if (xftfont_info->otf)
 390     OTF_close (xftfont_info->otf);
 391 #endif
 392   BLOCK_INPUT;
 393   XftFontClose (xftfont_info->display, xftfont_info->xftfont);
 394   UNBLOCK_INPUT;
 395 }
 396
 397 static int
 398 xftfont_prepare_face (f, face)
 399      FRAME_PTR f;
 400      struct face *face;
 401 {
 402   struct xftface_info *xftface_info;
 403
 404 #if 0
 405   /* This doesn't work if face->ascii_face doesn't use an Xft font. */
 406   if (face != face->ascii_face)
 407     {
 408       face->extra = face->ascii_face->extra;
 409       return 0;
 410     }
 411 #endif
 412
 413   xftface_info = malloc (sizeof (struct xftface_info));
 414   if (! xftface_info)
 415     return -1;
 416   xftfont_get_colors (f, face, face->gc, NULL,
 417                       &xftface_info->xft_fg, &xftface_info->xft_bg);
 418   face->extra = xftface_info;
 419   return 0;
 420 }
 421
 422 static void
 423 xftfont_done_face (f, face)
 424      FRAME_PTR f;
 425      struct face *face;
 426 {
 427   struct xftface_info *xftface_info;
 428
 429 #if 0
 430   /* This doesn't work if face->ascii_face doesn't use an Xft font. */
 431   if (face != face->ascii_face
 432       || ! face->extra)
 433     return;
 434 #endif
 435
 436   xftface_info = (struct xftface_info *) face->extra;
 437   if (xftface_info)
 438     {
 439       free (xftface_info);
 440       face->extra = NULL;
 441     }
 442 }
 443
 444 static unsigned
 445 xftfont_encode_char (font, c)
 446      struct font *font;
 447      int c;
 448 {
 449   struct xftfont_info *xftfont_info = (struct xftfont_info *) font;
 450   unsigned code = XftCharIndex (xftfont_info->display, xftfont_info->xftfont,
 451                                 (FcChar32) c);
 452
 453   return (code ? code : FONT_INVALID_CODE);
 454 }
 455
 456 static int
 457 xftfont_text_extents (font, code, nglyphs, metrics)
 458      struct font *font;
 459      unsigned *code;
 460      int nglyphs;
 461      struct font_metrics *metrics;
 462 {
 463   struct xftfont_info *xftfont_info = (struct xftfont_info *) font;
 464   XGlyphInfo extents;
 465
 466   BLOCK_INPUT;
 467   XftGlyphExtents (xftfont_info->display, xftfont_info->xftfont, code, nglyphs,
 468                    &extents);
 469   UNBLOCK_INPUT;
 470   if (metrics)
 471     {
 472       metrics->lbearing = - extents.x;
 473       metrics->rbearing = - extents.x + extents.width;
 474       metrics->width = extents.xOff;
 475       metrics->ascent = extents.y;
 476       metrics->descent = extents.height - extents.y;
 477     }
 478   return extents.xOff;
 479 }
 480
 481 static XftDraw *
 482 xftfont_get_xft_draw (f)
 483      FRAME_PTR f;
 484 {
 485   XftDraw *xft_draw = font_get_frame_data (f, &xftfont_driver);;
 486
 487   if (! xft_draw)
 488     {
 489       BLOCK_INPUT;
 490       xft_draw= XftDrawCreate (FRAME_X_DISPLAY (f),
 491                                FRAME_X_WINDOW (f),
 492                                FRAME_X_VISUAL (f),
 493                                FRAME_X_COLORMAP (f));
 494       UNBLOCK_INPUT;
 495       if (! xft_draw)
 496         abort ();
 497       font_put_frame_data (f, &xftfont_driver, xft_draw);
 498     }
 499   return xft_draw;
 500 }
 501
 502 static int
 503 xftfont_draw (s, from, to, x, y, with_background)
 504      struct glyph_string *s;
 505      int from, to, x, y, with_background;
 506 {
 507   FRAME_PTR f = s->f;
 508   struct face *face = s->face;
 509   struct xftfont_info *xftfont_info = (struct xftfont_info *) s->font;
 510   struct xftface_info *xftface_info = NULL;
 511   XftDraw *xft_draw = xftfont_get_xft_draw (f);
 512   FT_UInt *code;
 513   XftColor fg, bg;
 514   int len = to - from;
 515   int i;
 516
 517   if (s->font == face->font)
 518     xftface_info = (struct xftface_info *) face->extra;
 519   xftfont_get_colors (f, face, s->gc, xftface_info,
 520                       &fg, with_background ? &bg : NULL);
 521   BLOCK_INPUT;
 522   if (s->num_clips > 0)
 523     XftDrawSetClipRectangles (xft_draw, 0, 0, s->clip, s->num_clips);
 524   else
 525     XftDrawSetClip (xft_draw, NULL);
 526
 527   if (with_background)
 528     XftDrawRect (xft_draw, &bg,
 529                  x, y - face->font->ascent, s->width, face->font->height);
 530   code = alloca (sizeof (FT_UInt) * len);
 531   for (i = 0; i < len; i++)
 532     code[i] = ((XCHAR2B_BYTE1 (s->char2b + from + i) << 8)
 533                | XCHAR2B_BYTE2 (s->char2b + from + i));
 534
 535   if (s->padding_p)
 536     for (i = 0; i < len; i++)
 537       XftDrawGlyphs (xft_draw, &fg, xftfont_info->xftfont,
 538                      x + i, y, code + i, 1);
 539   else
 540     XftDrawGlyphs (xft_draw, &fg, xftfont_info->xftfont,
 541                    x, y, code, len);
 542   UNBLOCK_INPUT;
 543
 544   return len;
 545 }
 546
 547 static int
 548 xftfont_anchor_point (font, code, index, x, y)
 549      struct font *font;
 550      unsigned code;
 551      int index;
 552      int *x, *y;
 553 {
 554   struct xftfont_info *xftfont_info = (struct xftfont_info *) font;
 555   FT_Face ft_face = XftLockFace (xftfont_info->xftfont);
 556   int result;
 557
 558   if (FT_Load_Glyph (ft_face, code, FT_LOAD_DEFAULT) != 0)
 559     result = -1;
 560   else if (ft_face->glyph->format != FT_GLYPH_FORMAT_OUTLINE)
 561     result = -1;
 562   else if (index >= ft_face->glyph->outline.n_points)
 563     result = -1;
 564   else
 565     {
 566       *x = ft_face->glyph->outline.points[index].x;
 567       *y = ft_face->glyph->outline.points[index].y;
 568     }
 569   XftUnlockFace (xftfont_info->xftfont);
 570   return result;
 571 }
 572
 573 static int
 574 xftfont_end_for_frame (f)
 575      FRAME_PTR f;
 576 {
 577   XftDraw *xft_draw = font_get_frame_data (f, &xftfont_driver);
 578
 579   if (xft_draw)
 580     {
 581       BLOCK_INPUT;
 582       XftDrawDestroy (xft_draw);
 583       UNBLOCK_INPUT;
 584       font_put_frame_data (f, &xftfont_driver, NULL);
 585     }
 586   return 0;
 587 }
 588
 589 #ifdef HAVE_LIBOTF
 590 #ifdef HAVE_M17N_FLT
 591 static Lisp_Object
 592 xftfont_shape (lgstring)
 593      Lisp_Object lgstring;
 594 {
 595   struct font *font;
 596   struct xftfont_info *xftfont_info;
 597   Lisp_Object result;
 598   FT_Face ft_face;
 599
 600   CHECK_FONT_GET_OBJECT (LGSTRING_FONT (lgstring), font);
 601   xftfont_info = (struct xftfont_info *) font;
 602   if (! xftfont_info->maybe_otf)
 603     return Qnil;
 604   ft_face = XftLockFace (xftfont_info->xftfont);
 605   if (! xftfont_info->otf)
 606     {
 607       OTF *otf = OTF_open_ft_face (ft_face);
 608
 609       if (! otf || OTF_get_table (otf, "head") < 0)
 610         {
 611           if (otf)
 612             OTF_close (otf);
 613           xftfont_info->maybe_otf = 0;
 614           XftUnlockFace (xftfont_info->xftfont);
 615           return Qnil;
 616         }
 617       xftfont_info->otf = otf;
 618     }
 619
 620   result = ftfont_shape_by_flt (lgstring, font, ft_face, xftfont_info->otf);
 621   XftUnlockFace (xftfont_info->xftfont);
 622   return result;
 623 }
 624 #endif  /* HAVE_M17N_FLT */
 625 #endif  /* HAVE_LIBOTF */
 626
 627 void
 628 syms_of_xftfont ()
 629 {
 630   DEFSYM (Qxft, "xft");
 631   DEFSYM (QChinting, ":hinting");
 632   DEFSYM (QCautohint, ":autohing");
 633   DEFSYM (QChintstyle, ":hintstyle");
 634   DEFSYM (QCrgba, ":rgba");
 635   DEFSYM (QCembolden, ":embolden");
 636
 637   xftfont_driver = ftfont_driver;
 638   xftfont_driver.type = Qxft;
 639   xftfont_driver.get_cache = xfont_driver.get_cache;
 640   xftfont_driver.list = xftfont_list;
 641   xftfont_driver.match = xftfont_match;
 642   xftfont_driver.open = xftfont_open;
 643   xftfont_driver.close = xftfont_close;
 644   xftfont_driver.prepare_face = xftfont_prepare_face;
 645   xftfont_driver.done_face = xftfont_done_face;
 646   xftfont_driver.encode_char = xftfont_encode_char;
 647   xftfont_driver.text_extents = xftfont_text_extents;
 648   xftfont_driver.draw = xftfont_draw;
 649   xftfont_driver.anchor_point = xftfont_anchor_point;
 650   xftfont_driver.end_for_frame = xftfont_end_for_frame;
 651 #ifdef HAVE_LIBOTF
 652 #ifdef HAVE_M17N_FLT
 653   xftfont_driver.shape = xftfont_shape;
 654 #endif  /* HAVE_M17N_FLT */
 655 #endif  /* HAVE_LIBOTF */
 656
 657   register_font_driver (&xftfont_driver, NULL);
 658 }
 659
 660 /* arch-tag: 64ec61bf-7c8e-4fe6-b953-c6a85d5e1605
 661    (do not change this comment) */