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_HINT_STYLE, 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   /* Make sure that the Xrender extension is added before the Xft one.
 278      Otherwise, the close-display hook set by Xft is called after the
 279      one for Xrender, and the former tries to re-add the latter.  This
 280      results in inconsistency of internal states and leads to X
 281      protocol error when one reconnects to the same X server.
 282      (Bug#1696)  */
 283   {
 284     int event_base, error_base;
 285     XRenderQueryExtension (display, &event_base, &error_base);
 286   }
 287   match = XftFontMatch (display, FRAME_X_SCREEN_NUMBER (f), pat, &result);
 288   FcPatternDestroy (pat);
 289   xftfont = XftFontOpenPattern (display, match);
 290   if (!xftfont)
 291     {
 292       UNBLOCK_INPUT;
 293       XftPatternDestroy (match);
 294       return Qnil;
 295     }
 296   ft_face = XftLockFace (xftfont);
 297   UNBLOCK_INPUT;
 298
 299   /* We should not destroy PAT here because it is kept in XFTFONT and
 300      destroyed automatically when XFTFONT is closed.  */
 301   font_object = font_make_object (VECSIZE (struct xftfont_info), entity, size);
 302   ASET (font_object, FONT_TYPE_INDEX, Qxft);
 303   len = font_unparse_xlfd (entity, size, name, 256);
 304   if (len > 0)
 305     ASET (font_object, FONT_NAME_INDEX, make_string (name, len));
 306   len = font_unparse_fcname (entity, size, name, 256);
 307   if (len > 0)
 308     ASET (font_object, FONT_FULLNAME_INDEX, make_string (name, len));
 309   else
 310     ASET (font_object, FONT_FULLNAME_INDEX,
 311           AREF (font_object, FONT_NAME_INDEX));
 312   ASET (font_object, FONT_FILE_INDEX, filename);
 313   ASET (font_object, FONT_FORMAT_INDEX,
 314         ftfont_font_format (xftfont->pattern, filename));
 315   font = XFONT_OBJECT (font_object);
 316   font->pixel_size = pixel_size;
 317   font->driver = &xftfont_driver;
 318   font->encoding_charset = font->repertory_charset = -1;
 319
 320   xftfont_info = (struct xftfont_info *) font;
 321   xftfont_info->display = display;
 322   xftfont_info->screen = FRAME_X_SCREEN_NUMBER (f);
 323   xftfont_info->xftfont = xftfont;
 324   font->pixel_size = size;
 325   font->driver = &xftfont_driver;
 326   if (INTEGERP (AREF (entity, FONT_SPACING_INDEX)))
 327     spacing = XINT (AREF (entity, FONT_SPACING_INDEX));
 328   else
 329     spacing = FC_PROPORTIONAL;
 330   if (! ascii_printable[0])
 331     {
 332       int i;
 333       for (i = 0; i < 95; i++)
 334         ascii_printable[i] = ' ' + i;
 335     }
 336   BLOCK_INPUT;
 337   if (spacing != FC_PROPORTIONAL)
 338     {
 339       font->min_width = font->average_width = font->space_width
 340         = xftfont->max_advance_width;
 341       XftTextExtents8 (display, xftfont, ascii_printable + 1, 94, &extents);
 342     }
 343   else
 344     {
 345       XftTextExtents8 (display, xftfont, ascii_printable, 1, &extents);
 346       font->space_width = extents.xOff;
 347       if (font->space_width <= 0)
 348         /* dirty workaround */
 349         font->space_width = pixel_size;
 350       XftTextExtents8 (display, xftfont, ascii_printable + 1, 94, &extents);
 351       font->average_width = (font->space_width + extents.xOff) / 95;
 352     }
 353   UNBLOCK_INPUT;
 354
 355   font->ascent = xftfont->ascent;
 356   font->descent = xftfont->descent;
 357   if (pixel_size >= 5)
 358     {
 359       /* The above condition is a dirty workaround because
 360          XftTextExtents8 behaves strangely for some fonts
 361          (e.g. "Dejavu Sans Mono") when pixel_size is less than 5. */
 362       if (font->ascent < extents.y)
 363         font->ascent = extents.y;
 364       if (font->descent < extents.height - extents.y)
 365         font->descent = extents.height - extents.y;
 366     }
 367   font->height = font->ascent + font->descent;
 368
 369   if (XINT (AREF (entity, FONT_SIZE_INDEX)) == 0)
 370     {
 371       int upEM = ft_face->units_per_EM;
 372
 373       font->underline_position = -ft_face->underline_position * size / upEM;
 374       font->underline_thickness = ft_face->underline_thickness * size / upEM;
 375       if (font->underline_thickness > 2)
 376         font->underline_position -= font->underline_thickness / 2;
 377     }
 378   else
 379     {
 380       font->underline_position = -1;
 381       font->underline_thickness = 0;
 382     }
 383 #ifdef HAVE_LIBOTF
 384   xftfont_info->maybe_otf = ft_face->face_flags & FT_FACE_FLAG_SFNT;
 385   xftfont_info->otf = NULL;
 386 #endif  /* HAVE_LIBOTF */
 387   xftfont_info->ft_size = ft_face->size;
 388
 389   /* Unfortunately Xft doesn't provide a way to get minimum char
 390      width.  So, we use space_width instead.  */
 391   font->min_width = font->space_width;
 392
 393   font->baseline_offset = 0;
 394   font->relative_compose = 0;
 395   font->default_ascent = 0;
 396   font->vertical_centering = 0;
 397 #ifdef FT_BDF_H
 398   if (! (ft_face->face_flags & FT_FACE_FLAG_SFNT))
 399     {
 400       BDF_PropertyRec rec;
 401
 402       if (FT_Get_BDF_Property (ft_face, "_MULE_BASELINE_OFFSET", &rec) == 0
 403           && rec.type == BDF_PROPERTY_TYPE_INTEGER)
 404         font->baseline_offset = rec.u.integer;
 405       if (FT_Get_BDF_Property (ft_face, "_MULE_RELATIVE_COMPOSE", &rec) == 0
 406           && rec.type == BDF_PROPERTY_TYPE_INTEGER)
 407         font->relative_compose = rec.u.integer;
 408       if (FT_Get_BDF_Property (ft_face, "_MULE_DEFAULT_ASCENT", &rec) == 0
 409           && rec.type == BDF_PROPERTY_TYPE_INTEGER)
 410         font->default_ascent = rec.u.integer;
 411     }
 412 #endif
 413
 414   return font_object;
 415 }
 416
 417 static void
 418 xftfont_close (f, font)
 419      FRAME_PTR f;
 420      struct font *font;
 421 {
 422   struct xftfont_info *xftfont_info = (struct xftfont_info *) font;
 423
 424 #ifdef HAVE_LIBOTF
 425   if (xftfont_info->otf)
 426     OTF_close (xftfont_info->otf);
 427 #endif
 428   BLOCK_INPUT;
 429   XftUnlockFace (xftfont_info->xftfont);
 430   XftFontClose (xftfont_info->display, xftfont_info->xftfont);
 431   UNBLOCK_INPUT;
 432 }
 433
 434 static int
 435 xftfont_prepare_face (f, face)
 436      FRAME_PTR f;
 437      struct face *face;
 438 {
 439   struct xftface_info *xftface_info;
 440
 441 #if 0
 442   /* This doesn't work if face->ascii_face doesn't use an Xft font. */
 443   if (face != face->ascii_face)
 444     {
 445       face->extra = face->ascii_face->extra;
 446       return 0;
 447     }
 448 #endif
 449
 450   xftface_info = malloc (sizeof (struct xftface_info));
 451   if (! xftface_info)
 452     return -1;
 453   xftfont_get_colors (f, face, face->gc, NULL,
 454                       &xftface_info->xft_fg, &xftface_info->xft_bg);
 455   face->extra = xftface_info;
 456   return 0;
 457 }
 458
 459 static void
 460 xftfont_done_face (f, face)
 461      FRAME_PTR f;
 462      struct face *face;
 463 {
 464   struct xftface_info *xftface_info;
 465
 466 #if 0
 467   /* This doesn't work if face->ascii_face doesn't use an Xft font. */
 468   if (face != face->ascii_face
 469       || ! face->extra)
 470     return;
 471 #endif
 472
 473   xftface_info = (struct xftface_info *) face->extra;
 474   if (xftface_info)
 475     {
 476       free (xftface_info);
 477       face->extra = NULL;
 478     }
 479 }
 480
 481 extern Lisp_Object Qja, Qko;
 482
 483 static int
 484 xftfont_has_char (font, c)
 485      Lisp_Object font;
 486      int c;
 487 {
 488   struct xftfont_info *xftfont_info;
 489   struct charset *cs = NULL;
 490
 491   if (EQ (AREF (font, FONT_ADSTYLE_INDEX), Qja)
 492       && charset_jisx0208 >= 0)
 493     cs = CHARSET_FROM_ID (charset_jisx0208);
 494   else if (EQ (AREF (font, FONT_ADSTYLE_INDEX), Qko)
 495       && charset_ksc5601 >= 0)
 496     cs = CHARSET_FROM_ID (charset_ksc5601);
 497   if (cs)
 498     return (ENCODE_CHAR (cs, c) != CHARSET_INVALID_CODE (cs));
 499
 500   if (FONT_ENTITY_P (font))
 501     return ftfont_driver.has_char (font, c);
 502   xftfont_info = (struct xftfont_info *) XFONT_OBJECT (font);
 503   return (XftCharExists (xftfont_info->display, xftfont_info->xftfont,
 504                          (FcChar32) c) == FcTrue);
 505 }
 506
 507 static unsigned
 508 xftfont_encode_char (font, c)
 509      struct font *font;
 510      int c;
 511 {
 512   struct xftfont_info *xftfont_info = (struct xftfont_info *) font;
 513   unsigned code = XftCharIndex (xftfont_info->display, xftfont_info->xftfont,
 514                                 (FcChar32) c);
 515
 516   return (code ? code : FONT_INVALID_CODE);
 517 }
 518
 519 static int
 520 xftfont_text_extents (font, code, nglyphs, metrics)
 521      struct font *font;
 522      unsigned *code;
 523      int nglyphs;
 524      struct font_metrics *metrics;
 525 {
 526   struct xftfont_info *xftfont_info = (struct xftfont_info *) font;
 527   XGlyphInfo extents;
 528
 529   BLOCK_INPUT;
 530   XftGlyphExtents (xftfont_info->display, xftfont_info->xftfont, code, nglyphs,
 531                    &extents);
 532   UNBLOCK_INPUT;
 533   if (metrics)
 534     {
 535       metrics->lbearing = - extents.x;
 536       metrics->rbearing = - extents.x + extents.width;
 537       metrics->width = extents.xOff;
 538       metrics->ascent = extents.y;
 539       metrics->descent = extents.height - extents.y;
 540     }
 541   return extents.xOff;
 542 }
 543
 544 static XftDraw *
 545 xftfont_get_xft_draw (f)
 546      FRAME_PTR f;
 547 {
 548   XftDraw *xft_draw = font_get_frame_data (f, &xftfont_driver);
 549
 550   if (! xft_draw)
 551     {
 552       BLOCK_INPUT;
 553       xft_draw= XftDrawCreate (FRAME_X_DISPLAY (f),
 554                                FRAME_X_WINDOW (f),
 555                                FRAME_X_VISUAL (f),
 556                                FRAME_X_COLORMAP (f));
 557       UNBLOCK_INPUT;
 558       if (! xft_draw)
 559         abort ();
 560       font_put_frame_data (f, &xftfont_driver, xft_draw);
 561     }
 562   return xft_draw;
 563 }
 564
 565 static int
 566 xftfont_draw (s, from, to, x, y, with_background)
 567      struct glyph_string *s;
 568      int from, to, x, y, with_background;
 569 {
 570   FRAME_PTR f = s->f;
 571   struct face *face = s->face;
 572   struct xftfont_info *xftfont_info = (struct xftfont_info *) s->font;
 573   struct xftface_info *xftface_info = NULL;
 574   XftDraw *xft_draw = xftfont_get_xft_draw (f);
 575   FT_UInt *code;
 576   XftColor fg, bg;
 577   int len = to - from;
 578   int i;
 579
 580   if (s->font == face->font)
 581     xftface_info = (struct xftface_info *) face->extra;
 582   xftfont_get_colors (f, face, s->gc, xftface_info,
 583                       &fg, with_background ? &bg : NULL);
 584   BLOCK_INPUT;
 585   if (s->num_clips > 0)
 586     XftDrawSetClipRectangles (xft_draw, 0, 0, s->clip, s->num_clips);
 587   else
 588     XftDrawSetClip (xft_draw, NULL);
 589
 590   if (with_background)
 591     XftDrawRect (xft_draw, &bg,
 592                  x, y - face->font->ascent, s->width, face->font->height);
 593   code = alloca (sizeof (FT_UInt) * len);
 594   for (i = 0; i < len; i++)
 595     code[i] = ((XCHAR2B_BYTE1 (s->char2b + from + i) << 8)
 596                | XCHAR2B_BYTE2 (s->char2b + from + i));
 597
 598   if (s->padding_p)
 599     for (i = 0; i < len; i++)
 600       XftDrawGlyphs (xft_draw, &fg, xftfont_info->xftfont,
 601                      x + i, y, code + i, 1);
 602   else
 603     XftDrawGlyphs (xft_draw, &fg, xftfont_info->xftfont,
 604                    x, y, code, len);
 605   UNBLOCK_INPUT;
 606
 607   return len;
 608 }
 609
 610 static int
 611 xftfont_end_for_frame (f)
 612      FRAME_PTR f;
 613 {
 614   XftDraw *xft_draw = font_get_frame_data (f, &xftfont_driver);
 615
 616   if (xft_draw)
 617     {
 618       BLOCK_INPUT;
 619       XftDrawDestroy (xft_draw);
 620       UNBLOCK_INPUT;
 621       font_put_frame_data (f, &xftfont_driver, NULL);
 622     }
 623   return 0;
 624 }
 625
 626 void
 627 syms_of_xftfont ()
 628 {
 629   DEFSYM (Qxft, "xft");
 630   DEFSYM (QChinting, ":hinting");
 631   DEFSYM (QCautohint, ":autohint");
 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.has_char = xftfont_has_char;
 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.end_for_frame = xftfont_end_for_frame;
 650
 651   register_font_driver (&xftfont_driver, NULL);
 652 }
 653
 654 /* arch-tag: 64ec61bf-7c8e-4fe6-b953-c6a85d5e1605
 655    (do not change this comment) */