src/xftfont.c

   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 extern Lisp_Object Qja, Qko;
 471
 472 static int
 473 xftfont_has_char (font, c)
 474      Lisp_Object font;
 475      int c;
 476 {
 477   struct xftfont_info *xftfont_info;
 478   struct charset *cs = NULL;
 479
 480   if (FONT_ENTITY_P (font))
 481     return ftfont_driver.has_char (font, c);
 482
 483   if (EQ (AREF (font, FONT_ADSTYLE_INDEX), Qja)
 484       && charset_jisx0208 >= 0)
 485     cs = CHARSET_FROM_ID (charset_jisx0208);
 486   else if (EQ (AREF (font, FONT_ADSTYLE_INDEX), Qko)
 487       && charset_ksc5601 >= 0)
 488     cs = CHARSET_FROM_ID (charset_ksc5601);
 489   if (cs)
 490     return (ENCODE_CHAR (cs, c) != CHARSET_INVALID_CODE (cs));
 491
 492   xftfont_info = (struct xftfont_info *) XFONT_OBJECT (font);
 493   return (XftCharExists (xftfont_info->display, xftfont_info->xftfont,
 494                          (FcChar32) c) == FcTrue);
 495 }
 496
 497 static unsigned
 498 xftfont_encode_char (font, c)
 499      struct font *font;
 500      int c;
 501 {
 502   struct xftfont_info *xftfont_info = (struct xftfont_info *) font;
 503   unsigned code = XftCharIndex (xftfont_info->display, xftfont_info->xftfont,
 504                                 (FcChar32) c);
 505
 506   return (code ? code : FONT_INVALID_CODE);
 507 }
 508
 509 static int
 510 xftfont_text_extents (font, code, nglyphs, metrics)
 511      struct font *font;
 512      unsigned *code;
 513      int nglyphs;
 514      struct font_metrics *metrics;
 515 {
 516   struct xftfont_info *xftfont_info = (struct xftfont_info *) font;
 517   XGlyphInfo extents;
 518
 519   BLOCK_INPUT;
 520   XftGlyphExtents (xftfont_info->display, xftfont_info->xftfont, code, nglyphs,
 521                    &extents);
 522   UNBLOCK_INPUT;
 523   if (metrics)
 524     {
 525       metrics->lbearing = - extents.x;
 526       metrics->rbearing = - extents.x + extents.width;
 527       metrics->width = extents.xOff;
 528       metrics->ascent = extents.y;
 529       metrics->descent = extents.height - extents.y;
 530     }
 531   return extents.xOff;
 532 }
 533
 534 static XftDraw *
 535 xftfont_get_xft_draw (f)
 536      FRAME_PTR f;
 537 {
 538   XftDraw *xft_draw = font_get_frame_data (f, &xftfont_driver);
 539
 540   if (! xft_draw)
 541     {
 542       BLOCK_INPUT;
 543       xft_draw= XftDrawCreate (FRAME_X_DISPLAY (f),
 544                                FRAME_X_WINDOW (f),
 545                                FRAME_X_VISUAL (f),
 546                                FRAME_X_COLORMAP (f));
 547       UNBLOCK_INPUT;
 548       if (! xft_draw)
 549         abort ();
 550       font_put_frame_data (f, &xftfont_driver, xft_draw);
 551     }
 552   return xft_draw;
 553 }
 554
 555 static int
 556 xftfont_draw (s, from, to, x, y, with_background)
 557      struct glyph_string *s;
 558      int from, to, x, y, with_background;
 559 {
 560   FRAME_PTR f = s->f;
 561   struct face *face = s->face;
 562   struct xftfont_info *xftfont_info = (struct xftfont_info *) s->font;
 563   struct xftface_info *xftface_info = NULL;
 564   XftDraw *xft_draw = xftfont_get_xft_draw (f);
 565   FT_UInt *code;
 566   XftColor fg, bg;
 567   int len = to - from;
 568   int i;
 569
 570   if (s->font == face->font)
 571     xftface_info = (struct xftface_info *) face->extra;
 572   xftfont_get_colors (f, face, s->gc, xftface_info,
 573                       &fg, with_background ? &bg : NULL);
 574   BLOCK_INPUT;
 575   if (s->num_clips > 0)
 576     XftDrawSetClipRectangles (xft_draw, 0, 0, s->clip, s->num_clips);
 577   else
 578     XftDrawSetClip (xft_draw, NULL);
 579
 580   if (with_background)
 581     XftDrawRect (xft_draw, &bg,
 582                  x, y - face->font->ascent, s->width, face->font->height);
 583   code = alloca (sizeof (FT_UInt) * len);
 584   for (i = 0; i < len; i++)
 585     code[i] = ((XCHAR2B_BYTE1 (s->char2b + from + i) << 8)
 586                | XCHAR2B_BYTE2 (s->char2b + from + i));
 587
 588   if (s->padding_p)
 589     for (i = 0; i < len; i++)
 590       XftDrawGlyphs (xft_draw, &fg, xftfont_info->xftfont,
 591                      x + i, y, code + i, 1);
 592   else
 593     XftDrawGlyphs (xft_draw, &fg, xftfont_info->xftfont,
 594                    x, y, code, len);
 595   UNBLOCK_INPUT;
 596
 597   return len;
 598 }
 599
 600 static int
 601 xftfont_end_for_frame (f)
 602      FRAME_PTR f;
 603 {
 604   XftDraw *xft_draw = font_get_frame_data (f, &xftfont_driver);
 605
 606   if (xft_draw)
 607     {
 608       BLOCK_INPUT;
 609       XftDrawDestroy (xft_draw);
 610       UNBLOCK_INPUT;
 611       font_put_frame_data (f, &xftfont_driver, NULL);
 612     }
 613   return 0;
 614 }
 615
 616 void
 617 syms_of_xftfont ()
 618 {
 619   DEFSYM (Qxft, "xft");
 620   DEFSYM (QChinting, ":hinting");
 621   DEFSYM (QCautohint, ":autohint");
 622   DEFSYM (QChintstyle, ":hintstyle");
 623   DEFSYM (QCrgba, ":rgba");
 624   DEFSYM (QCembolden, ":embolden");
 625
 626   xftfont_driver = ftfont_driver;
 627   xftfont_driver.type = Qxft;
 628   xftfont_driver.get_cache = xfont_driver.get_cache;
 629   xftfont_driver.list = xftfont_list;
 630   xftfont_driver.match = xftfont_match;
 631   xftfont_driver.open = xftfont_open;
 632   xftfont_driver.close = xftfont_close;
 633   xftfont_driver.prepare_face = xftfont_prepare_face;
 634   xftfont_driver.done_face = xftfont_done_face;
 635   xftfont_driver.has_char = xftfont_has_char;
 636   xftfont_driver.encode_char = xftfont_encode_char;
 637   xftfont_driver.text_extents = xftfont_text_extents;
 638   xftfont_driver.draw = xftfont_draw;
 639   xftfont_driver.end_for_frame = xftfont_end_for_frame;
 640
 641   register_font_driver (&xftfont_driver, NULL);
 642 }
 643
 644 /* arch-tag: 64ec61bf-7c8e-4fe6-b953-c6a85d5e1605
 645    (do not change this comment) */