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