code.delx.au - gnu-emacs/blob - 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 <setjmp.h>
  25 #include <X11/Xlib.h>
  26 #include <X11/Xft/Xft.h>
  27
  28 #include "lisp.h"
  29 #include "dispextern.h"
  30 #include "xterm.h"
  31 #include "frame.h"
  32 #include "blockinput.h"
  33 #include "character.h"
  34 #include "charset.h"
  35 #include "fontset.h"
  36 #include "font.h"
  37 #include "ftfont.h"
  38
  39 /* Xft font driver.  */
  40
  41 static Lisp_Object Qxft;
  42 static Lisp_Object QChinting , QCautohint, QChintstyle, QCrgba, QCembolden;
  43
  44 /* The actual structure for Xft font that can be casted to struct
  45    font.  */
  46
  47 struct xftfont_info
  48 {
  49   struct font font;
  50   /* The following four members must be here in this order to be
  51      compatible with struct ftfont_info (in ftfont.c).  */
  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   FT_Size ft_size;
  57   int index;
  58   Display *display;
  59   int screen;
  60   XftFont *xftfont;
  61 };
  62
  63 /* Structure pointed by (struct face *)->extra  */
  64
  65 struct xftface_info
  66 {
  67   XftColor xft_fg;              /* color for face->foreground */
  68   XftColor xft_bg;              /* color for face->background */
  69 };
  70
  71 static void xftfont_get_colors P_ ((FRAME_PTR, struct face *, GC gc,
  72                                     struct xftface_info *,
  73                                     XftColor *fg, XftColor *bg));
  74
  75
  76 /* Setup foreground and background colors of GC into FG and BG.  If
  77    XFTFACE_INFO is not NULL, reuse the colors in it if possible.  BG
  78    may be NULL.  */
  79
  80 static void
  81 xftfont_get_colors (f, face, gc, xftface_info, fg, bg)
  82      FRAME_PTR f;
  83      struct face *face;
  84      GC gc;
  85      struct xftface_info *xftface_info;
  86      XftColor *fg, *bg;
  87 {
  88   if (xftface_info && face->gc == gc)
  89     {
  90       *fg = xftface_info->xft_fg;
  91       if (bg)
  92         *bg = xftface_info->xft_bg;
  93     }
  94   else
  95     {
  96       XGCValues xgcv;
  97       int fg_done = 0, bg_done = 0;
  98
  99       BLOCK_INPUT;
 100       XGetGCValues (FRAME_X_DISPLAY (f), gc,
 101                     GCForeground | GCBackground, &xgcv);
 102       if (xftface_info)
 103         {
 104           if (xgcv.foreground == face->foreground)
 105             *fg = xftface_info->xft_fg, fg_done = 1;
 106           else if (xgcv.foreground == face->background)
 107             *fg = xftface_info->xft_bg, fg_done = 1;
 108           if (! bg)
 109             bg_done = 1;
 110           else if (xgcv.background == face->background)
 111             *bg = xftface_info->xft_bg, bg_done = 1;
 112           else if (xgcv.background == face->foreground)
 113             *bg = xftface_info->xft_fg, bg_done = 1;
 114         }
 115
 116       if (fg_done + bg_done < 2)
 117         {
 118           XColor colors[2];
 119
 120           colors[0].pixel = fg->pixel = xgcv.foreground;
 121           if (bg)
 122             colors[1].pixel = bg->pixel = xgcv.background;
 123           XQueryColors (FRAME_X_DISPLAY (f), FRAME_X_COLORMAP (f), colors,
 124                         bg ? 2 : 1);
 125           fg->color.alpha = 0xFFFF;
 126           fg->color.red = colors[0].red;
 127           fg->color.green = colors[0].green;
 128           fg->color.blue = colors[0].blue;
 129           if (bg)
 130             {
 131               bg->color.alpha = 0xFFFF;
 132               bg->color.red = colors[1].red;
 133               bg->color.green = colors[1].green;
 134               bg->color.blue = colors[1].blue;
 135             }
 136         }
 137       UNBLOCK_INPUT;
 138     }
 139 }
 140
 141
 142 static Lisp_Object xftfont_list P_ ((Lisp_Object, Lisp_Object));
 143 static Lisp_Object xftfont_match P_ ((Lisp_Object, Lisp_Object));
 144 static Lisp_Object xftfont_open P_ ((FRAME_PTR, Lisp_Object, int));
 145 static void xftfont_close P_ ((FRAME_PTR, struct font *));
 146 static int xftfont_prepare_face P_ ((FRAME_PTR, struct face *));
 147 static void xftfont_done_face P_ ((FRAME_PTR, struct face *));
 148 static int xftfont_has_char P_ ((Lisp_Object, int));
 149 static unsigned xftfont_encode_char P_ ((struct font *, int));
 150 static int xftfont_text_extents P_ ((struct font *, unsigned *, int,
 151                                      struct font_metrics *));
 152 static int xftfont_draw P_ ((struct glyph_string *, int, int, int, int, int));
 153 static int xftfont_end_for_frame P_ ((FRAME_PTR f));
 154
 155 struct font_driver xftfont_driver;
 156
 157 static Lisp_Object
 158 xftfont_list (frame, spec)
 159      Lisp_Object frame;
 160      Lisp_Object spec;
 161 {
 162   Lisp_Object list = ftfont_driver.list (frame, spec), tail;
 163
 164   for (tail = list; CONSP (tail); tail = XCDR (tail))
 165     ASET (XCAR (tail), FONT_TYPE_INDEX, Qxft);
 166   return list;
 167 }
 168
 169 static Lisp_Object
 170 xftfont_match (frame, spec)
 171      Lisp_Object frame;
 172      Lisp_Object spec;
 173 {
 174   Lisp_Object entity = ftfont_driver.match (frame, spec);
 175
 176   if (! NILP (entity))
 177     ASET (entity, FONT_TYPE_INDEX, Qxft);
 178   return entity;
 179 }
 180
 181 extern Lisp_Object ftfont_font_format P_ ((FcPattern *, Lisp_Object));
 182 extern FcCharSet *ftfont_get_fc_charset P_ ((Lisp_Object));
 183 extern Lisp_Object QCantialias;
 184
 185 static FcChar8 ascii_printable[95];
 186
 187 static Lisp_Object
 188 xftfont_open (f, entity, pixel_size)
 189      FRAME_PTR f;
 190      Lisp_Object entity;
 191      int pixel_size;
 192 {
 193   FcResult result;
 194   Display *display = FRAME_X_DISPLAY (f);
 195   Lisp_Object val, filename, index, tail, font_object;
 196   FcPattern *pat = NULL, *match;
 197   struct xftfont_info *xftfont_info = NULL;
 198   struct font *font;
 199   double size = 0;
 200   XftFont *xftfont = NULL;
 201   int spacing;
 202   char name[256];
 203   int len, i;
 204   XGlyphInfo extents;
 205   FT_Face ft_face;
 206
 207   val = assq_no_quit (QCfont_entity, AREF (entity, FONT_EXTRA_INDEX));
 208   if (! CONSP (val))
 209     return Qnil;
 210   val = XCDR (val);
 211   filename = XCAR (val);
 212   index = XCDR (val);
 213   size = XINT (AREF (entity, FONT_SIZE_INDEX));
 214   if (size == 0)
 215     size = pixel_size;
 216   pat = FcPatternCreate ();
 217   FcPatternAddInteger (pat, FC_WEIGHT, FONT_WEIGHT_NUMERIC (entity));
 218   i = FONT_SLANT_NUMERIC (entity) - 100;
 219   if (i < 0) i = 0;
 220   FcPatternAddInteger (pat, FC_SLANT, i);
 221   FcPatternAddInteger (pat, FC_WIDTH, FONT_WIDTH_NUMERIC (entity));
 222   FcPatternAddDouble (pat, FC_PIXEL_SIZE, pixel_size);
 223   val = AREF (entity, FONT_FAMILY_INDEX);
 224   if (! NILP (val))
 225     FcPatternAddString (pat, FC_FAMILY, (FcChar8 *) SDATA (SYMBOL_NAME (val)));
 226   val = AREF (entity, FONT_FOUNDRY_INDEX);
 227   if (! NILP (val))
 228     FcPatternAddString (pat, FC_FOUNDRY, (FcChar8 *) SDATA (SYMBOL_NAME (val)));
 229   val = AREF (entity, FONT_SPACING_INDEX);
 230   if (! NILP (val))
 231     FcPatternAddInteger (pat, FC_SPACING, XINT (val));
 232   val = AREF (entity, FONT_DPI_INDEX);
 233   if (! NILP (val))
 234     {
 235       double dbl = XINT (val);
 236
 237       FcPatternAddDouble (pat, FC_DPI, dbl);
 238     }
 239   val = AREF (entity, FONT_AVGWIDTH_INDEX);
 240   if (INTEGERP (val) && XINT (val) == 0)
 241     FcPatternAddBool (pat, FC_SCALABLE, FcTrue);
 242   /* This is necessary to identify the exact font (e.g. 10x20.pcf.gz
 243      over 10x20-ISO8859-1.pcf.gz).  */
 244   FcPatternAddCharSet (pat, FC_CHARSET, ftfont_get_fc_charset (entity));
 245
 246   for (tail = AREF (entity, FONT_EXTRA_INDEX); CONSP (tail); tail = XCDR (tail))
 247     {
 248       Lisp_Object key, val;
 249
 250       key = XCAR (XCAR (tail)), val = XCDR (XCAR (tail));
 251       if (EQ (key, QCantialias))
 252         FcPatternAddBool (pat, FC_ANTIALIAS, NILP (val) ? FcFalse : FcTrue);
 253       else if (EQ (key, QChinting))
 254         FcPatternAddBool (pat, FC_HINTING, NILP (val) ? FcFalse : FcTrue);
 255       else if (EQ (key, QCautohint))
 256         FcPatternAddBool (pat, FC_AUTOHINT, NILP (val) ? FcFalse : FcTrue);
 257       else if (EQ (key, QChintstyle))
 258         {
 259           if (INTEGERP (val))
 260             FcPatternAddInteger (pat, FC_HINT_STYLE, XINT (val));
 261         }
 262       else if (EQ (key, QCrgba))
 263         {
 264           if (INTEGERP (val))
 265             FcPatternAddInteger (pat, FC_RGBA, XINT (val));
 266         }
 267 #ifdef FC_EMBOLDEN
 268       else if (EQ (key, QCembolden))
 269         FcPatternAddBool (pat, FC_EMBOLDEN, NILP (val) ? FcFalse : FcTrue);
 270 #endif
 271     }
 272
 273   FcPatternAddString (pat, FC_FILE, (FcChar8 *) SDATA (filename));
 274   FcPatternAddInteger (pat, FC_INDEX, XINT (index));
 275
 276
 277   BLOCK_INPUT;
 278   /* Make sure that the Xrender extension is added before the Xft one.
 279      Otherwise, the close-display hook set by Xft is called after the
 280      one for Xrender, and the former tries to re-add the latter.  This
 281      results in inconsistency of internal states and leads to X
 282      protocol error when one reconnects to the same X server.
 283      (Bug#1696)  */
 284   {
 285     int event_base, error_base;
 286     XRenderQueryExtension (display, &event_base, &error_base);
 287   }
 288   match = XftFontMatch (display, FRAME_X_SCREEN_NUMBER (f), pat, &result);
 289   FcPatternDestroy (pat);
 290   xftfont = XftFontOpenPattern (display, match);
 291   if (!xftfont)
 292     {
 293       UNBLOCK_INPUT;
 294       XftPatternDestroy (match);
 295       return Qnil;
 296     }
 297   ft_face = XftLockFace (xftfont);
 298   UNBLOCK_INPUT;
 299
 300   /* We should not destroy PAT here because it is kept in XFTFONT and
 301      destroyed automatically when XFTFONT is closed.  */
 302   font_object = font_make_object (VECSIZE (struct xftfont_info), entity, size);
 303   ASET (font_object, FONT_TYPE_INDEX, Qxft);
 304   len = font_unparse_xlfd (entity, size, name, 256);
 305   if (len > 0)
 306     ASET (font_object, FONT_NAME_INDEX, make_string (name, len));
 307   len = font_unparse_fcname (entity, size, name, 256);
 308   if (len > 0)
 309     ASET (font_object, FONT_FULLNAME_INDEX, make_string (name, len));
 310   else
 311     ASET (font_object, FONT_FULLNAME_INDEX,
 312           AREF (font_object, FONT_NAME_INDEX));
 313   ASET (font_object, FONT_FILE_INDEX, filename);
 314   ASET (font_object, FONT_FORMAT_INDEX,
 315         ftfont_font_format (xftfont->pattern, filename));
 316   font = XFONT_OBJECT (font_object);
 317   font->pixel_size = pixel_size;
 318   font->driver = &xftfont_driver;
 319   font->encoding_charset = font->repertory_charset = -1;
 320
 321   xftfont_info = (struct xftfont_info *) font;
 322   xftfont_info->display = display;
 323   xftfont_info->screen = FRAME_X_SCREEN_NUMBER (f);
 324   xftfont_info->xftfont = xftfont;
 325   font->pixel_size = size;
 326   font->driver = &xftfont_driver;
 327   if (INTEGERP (AREF (entity, FONT_SPACING_INDEX)))
 328     spacing = XINT (AREF (entity, FONT_SPACING_INDEX));
 329   else
 330     spacing = FC_PROPORTIONAL;
 331   if (! ascii_printable[0])
 332     {
 333       int i;
 334       for (i = 0; i < 95; i++)
 335         ascii_printable[i] = ' ' + i;
 336     }
 337   BLOCK_INPUT;
 338   if (spacing != FC_PROPORTIONAL)
 339     {
 340       font->min_width = font->average_width = font->space_width
 341         = xftfont->max_advance_width;
 342       XftTextExtents8 (display, xftfont, ascii_printable + 1, 94, &extents);
 343     }
 344   else
 345     {
 346       XftTextExtents8 (display, xftfont, ascii_printable, 1, &extents);
 347       font->space_width = extents.xOff;
 348       if (font->space_width <= 0)
 349         /* dirty workaround */
 350         font->space_width = pixel_size;
 351       XftTextExtents8 (display, xftfont, ascii_printable + 1, 94, &extents);
 352       font->average_width = (font->space_width + extents.xOff) / 95;
 353     }
 354   UNBLOCK_INPUT;
 355
 356   font->ascent = xftfont->ascent;
 357   font->descent = xftfont->descent;
 358   if (pixel_size >= 5)
 359     {
 360       /* The above condition is a dirty workaround because
 361          XftTextExtents8 behaves strangely for some fonts
 362          (e.g. "Dejavu Sans Mono") when pixel_size is less than 5. */
 363       if (font->ascent < extents.y)
 364         font->ascent = extents.y;
 365       if (font->descent < extents.height - extents.y)
 366         font->descent = extents.height - extents.y;
 367     }
 368   font->height = font->ascent + font->descent;
 369
 370   if (XINT (AREF (entity, FONT_SIZE_INDEX)) == 0)
 371     {
 372       int upEM = ft_face->units_per_EM;
 373
 374       font->underline_position = -ft_face->underline_position * size / upEM;
 375       font->underline_thickness = ft_face->underline_thickness * size / upEM;
 376       if (font->underline_thickness > 2)
 377         font->underline_position -= font->underline_thickness / 2;
 378     }
 379   else
 380     {
 381       font->underline_position = -1;
 382       font->underline_thickness = 0;
 383     }
 384 #ifdef HAVE_LIBOTF
 385   xftfont_info->maybe_otf = ft_face->face_flags & FT_FACE_FLAG_SFNT;
 386   xftfont_info->otf = NULL;
 387 #endif  /* HAVE_LIBOTF */
 388   xftfont_info->ft_size = ft_face->size;
 389
 390   /* Unfortunately Xft doesn't provide a way to get minimum char
 391      width.  So, we use space_width instead.  */
 392   font->min_width = font->space_width;
 393
 394   font->baseline_offset = 0;
 395   font->relative_compose = 0;
 396   font->default_ascent = 0;
 397   font->vertical_centering = 0;
 398 #ifdef FT_BDF_H
 399   if (! (ft_face->face_flags & FT_FACE_FLAG_SFNT))
 400     {
 401       BDF_PropertyRec rec;
 402
 403       if (FT_Get_BDF_Property (ft_face, "_MULE_BASELINE_OFFSET", &rec) == 0
 404           && rec.type == BDF_PROPERTY_TYPE_INTEGER)
 405         font->baseline_offset = rec.u.integer;
 406       if (FT_Get_BDF_Property (ft_face, "_MULE_RELATIVE_COMPOSE", &rec) == 0
 407           && rec.type == BDF_PROPERTY_TYPE_INTEGER)
 408         font->relative_compose = rec.u.integer;
 409       if (FT_Get_BDF_Property (ft_face, "_MULE_DEFAULT_ASCENT", &rec) == 0
 410           && rec.type == BDF_PROPERTY_TYPE_INTEGER)
 411         font->default_ascent = rec.u.integer;
 412     }
 413 #endif
 414
 415   return font_object;
 416 }
 417
 418 static void
 419 xftfont_close (f, font)
 420      FRAME_PTR f;
 421      struct font *font;
 422 {
 423   struct xftfont_info *xftfont_info = (struct xftfont_info *) font;
 424
 425 #ifdef HAVE_LIBOTF
 426   if (xftfont_info->otf)
 427     OTF_close (xftfont_info->otf);
 428 #endif
 429   BLOCK_INPUT;
 430   XftUnlockFace (xftfont_info->xftfont);
 431   XftFontClose (xftfont_info->display, xftfont_info->xftfont);
 432   UNBLOCK_INPUT;
 433 }
 434
 435 static int
 436 xftfont_prepare_face (f, face)
 437      FRAME_PTR f;
 438      struct face *face;
 439 {
 440   struct xftface_info *xftface_info;
 441
 442 #if 0
 443   /* This doesn't work if face->ascii_face doesn't use an Xft font. */
 444   if (face != face->ascii_face)
 445     {
 446       face->extra = face->ascii_face->extra;
 447       return 0;
 448     }
 449 #endif
 450
 451   xftface_info = malloc (sizeof (struct xftface_info));
 452   if (! xftface_info)
 453     return -1;
 454   xftfont_get_colors (f, face, face->gc, NULL,
 455                       &xftface_info->xft_fg, &xftface_info->xft_bg);
 456   face->extra = xftface_info;
 457   return 0;
 458 }
 459
 460 static void
 461 xftfont_done_face (f, face)
 462      FRAME_PTR f;
 463      struct face *face;
 464 {
 465   struct xftface_info *xftface_info;
 466
 467 #if 0
 468   /* This doesn't work if face->ascii_face doesn't use an Xft font. */
 469   if (face != face->ascii_face
 470       || ! face->extra)
 471     return;
 472 #endif
 473
 474   xftface_info = (struct xftface_info *) face->extra;
 475   if (xftface_info)
 476     {
 477       free (xftface_info);
 478       face->extra = NULL;
 479     }
 480 }
 481
 482 extern Lisp_Object Qja, Qko;
 483
 484 static int
 485 xftfont_has_char (font, c)
 486      Lisp_Object font;
 487      int c;
 488 {
 489   struct xftfont_info *xftfont_info;
 490   struct charset *cs = NULL;
 491
 492   if (EQ (AREF (font, FONT_ADSTYLE_INDEX), Qja)
 493       && charset_jisx0208 >= 0)
 494     cs = CHARSET_FROM_ID (charset_jisx0208);
 495   else if (EQ (AREF (font, FONT_ADSTYLE_INDEX), Qko)
 496       && charset_ksc5601 >= 0)
 497     cs = CHARSET_FROM_ID (charset_ksc5601);
 498   if (cs)
 499     return (ENCODE_CHAR (cs, c) != CHARSET_INVALID_CODE (cs));
 500
 501   if (FONT_ENTITY_P (font))
 502     return ftfont_driver.has_char (font, c);
 503   xftfont_info = (struct xftfont_info *) XFONT_OBJECT (font);
 504   return (XftCharExists (xftfont_info->display, xftfont_info->xftfont,
 505                          (FcChar32) c) == FcTrue);
 506 }
 507
 508 static unsigned
 509 xftfont_encode_char (font, c)
 510      struct font *font;
 511      int c;
 512 {
 513   struct xftfont_info *xftfont_info = (struct xftfont_info *) font;
 514   unsigned code = XftCharIndex (xftfont_info->display, xftfont_info->xftfont,
 515                                 (FcChar32) c);
 516
 517   return (code ? code : FONT_INVALID_CODE);
 518 }
 519
 520 static int
 521 xftfont_text_extents (font, code, nglyphs, metrics)
 522      struct font *font;
 523      unsigned *code;
 524      int nglyphs;
 525      struct font_metrics *metrics;
 526 {
 527   struct xftfont_info *xftfont_info = (struct xftfont_info *) font;
 528   XGlyphInfo extents;
 529
 530   BLOCK_INPUT;
 531   XftGlyphExtents (xftfont_info->display, xftfont_info->xftfont, code, nglyphs,
 532                    &extents);
 533   UNBLOCK_INPUT;
 534   if (metrics)
 535     {
 536       metrics->lbearing = - extents.x;
 537       metrics->rbearing = - extents.x + extents.width;
 538       metrics->width = extents.xOff;
 539       metrics->ascent = extents.y;
 540       metrics->descent = extents.height - extents.y;
 541     }
 542   return extents.xOff;
 543 }
 544
 545 static XftDraw *
 546 xftfont_get_xft_draw (f)
 547      FRAME_PTR f;
 548 {
 549   XftDraw *xft_draw = font_get_frame_data (f, &xftfont_driver);
 550
 551   if (! xft_draw)
 552     {
 553       BLOCK_INPUT;
 554       xft_draw= XftDrawCreate (FRAME_X_DISPLAY (f),
 555                                FRAME_X_WINDOW (f),
 556                                FRAME_X_VISUAL (f),
 557                                FRAME_X_COLORMAP (f));
 558       UNBLOCK_INPUT;
 559       if (! xft_draw)
 560         abort ();
 561       font_put_frame_data (f, &xftfont_driver, xft_draw);
 562     }
 563   return xft_draw;
 564 }
 565
 566 static int
 567 xftfont_draw (s, from, to, x, y, with_background)
 568      struct glyph_string *s;
 569      int from, to, x, y, with_background;
 570 {
 571   FRAME_PTR f = s->f;
 572   struct face *face = s->face;
 573   struct xftfont_info *xftfont_info = (struct xftfont_info *) s->font;
 574   struct xftface_info *xftface_info = NULL;
 575   XftDraw *xft_draw = xftfont_get_xft_draw (f);
 576   FT_UInt *code;
 577   XftColor fg, bg;
 578   int len = to - from;
 579   int i;
 580
 581   if (s->font == face->font)
 582     xftface_info = (struct xftface_info *) face->extra;
 583   xftfont_get_colors (f, face, s->gc, xftface_info,
 584                       &fg, with_background ? &bg : NULL);
 585   BLOCK_INPUT;
 586   if (s->num_clips > 0)
 587     XftDrawSetClipRectangles (xft_draw, 0, 0, s->clip, s->num_clips);
 588   else
 589     XftDrawSetClip (xft_draw, NULL);
 590
 591   if (with_background)
 592     XftDrawRect (xft_draw, &bg,
 593                  x, y - face->font->ascent, s->width, face->font->height);
 594   code = alloca (sizeof (FT_UInt) * len);
 595   for (i = 0; i < len; i++)
 596     code[i] = ((XCHAR2B_BYTE1 (s->char2b + from + i) << 8)
 597                | XCHAR2B_BYTE2 (s->char2b + from + i));
 598
 599   if (s->padding_p)
 600     for (i = 0; i < len; i++)
 601       XftDrawGlyphs (xft_draw, &fg, xftfont_info->xftfont,
 602                      x + i, y, code + i, 1);
 603   else
 604     XftDrawGlyphs (xft_draw, &fg, xftfont_info->xftfont,
 605                    x, y, code, len);
 606   UNBLOCK_INPUT;
 607
 608   return len;
 609 }
 610
 611 static int
 612 xftfont_end_for_frame (f)
 613      FRAME_PTR f;
 614 {
 615   XftDraw *xft_draw = font_get_frame_data (f, &xftfont_driver);
 616
 617   if (xft_draw)
 618     {
 619       BLOCK_INPUT;
 620       XftDrawDestroy (xft_draw);
 621       UNBLOCK_INPUT;
 622       font_put_frame_data (f, &xftfont_driver, NULL);
 623     }
 624   return 0;
 625 }
 626
 627 void
 628 syms_of_xftfont ()
 629 {
 630   DEFSYM (Qxft, "xft");
 631   DEFSYM (QChinting, ":hinting");
 632   DEFSYM (QCautohint, ":autohint");
 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.has_char = xftfont_has_char;
 647   xftfont_driver.encode_char = xftfont_encode_char;
 648   xftfont_driver.text_extents = xftfont_text_extents;
 649   xftfont_driver.draw = xftfont_draw;
 650   xftfont_driver.end_for_frame = xftfont_end_for_frame;
 651
 652   register_font_driver (&xftfont_driver, NULL);
 653 }
 654
 655 /* arch-tag: 64ec61bf-7c8e-4fe6-b953-c6a85d5e1605
 656    (do not change this comment) */