summaryrefslogtreecommitdiff
path: root/src/w32faces.c
blob: c7b4c3263e03ee112ef9f747730d80be47c71842 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
/* "Face" primitives.
   Copyright (C) 1993, 1994, 1995 Free Software Foundation.

This file is part of GNU Emacs.

GNU Emacs is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING.  If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

/* Ported xfaces.c for win32 - Kevin Gallo */

#include <sys/types.h>
#include <sys/stat.h>

#include <config.h>
#include "lisp.h"

#include "w32term.h"
#include "buffer.h"
#include "dispextern.h"
#include "frame.h"
#include "blockinput.h"
#include "window.h"
#include "intervals.h"


/* An explanation of the face data structures.  */

/* ========================= Face Data Structures =========================

   Let FACE-NAME be a symbol naming a face.

   Let FACE-VECTOR be (assq FACE-NAME (frame-face-alist FRAME))
   FACE-VECTOR is either nil, or a vector of the form
       [face NAME ID FONT FOREGROUND BACKGROUND BACKGROUND-PIXMAP UNDERLINE-P]
   where
       face is the symbol `face',
       NAME is the symbol with which this vector is associated (a backpointer),
       ID is the face ID, an integer used internally by the C code to identify
           the face,
       FONT, FOREGROUND, and BACKGROUND are strings naming the fonts and colors
           to use with the face,
       BACKGROUND-PIXMAP is the name of an x bitmap filename, which we don't
           use right now, and
       UNDERLINE-P is non-nil if the face should be underlined.
   If any of these elements are nil, that parameter is considered
   unspecified; parameters from faces specified by lower-priority
   overlays or text properties, or the parameters of the frame itself,
   can show through.  (lisp/faces.el maintains these lists.)

   (assq FACE-NAME global-face-data) returns a vector describing the
   global parameters for that face.

   Let PARAM-FACE be FRAME->display.x->param_faces[Faref (FACE-VECTOR, 2)].
   PARAM_FACE is a struct face whose members are the Xlib analogues of
   the parameters in FACE-VECTOR.  If an element of FACE-VECTOR is
   nil, then the corresponding member of PARAM_FACE is FACE_DEFAULT.
   These faces are called "parameter faces", because they're the ones
   lisp manipulates to control what gets displayed.  Elements 0 and 1
   of FRAME->display.x->param_faces are special - they describe the
   default and mode line faces.  None of the faces in param_faces have
   GC's.  (See src/dispextern.h for the definition of struct face.
   lisp/faces.el maintains the isomorphism between face_alist and
   param_faces.)

   The functions compute_char_face and compute_glyph_face find and
   combine the parameter faces associated with overlays and text
   properties.  The resulting faces are called "computed faces"; none
   of their members are FACE_DEFAULT; they are completely specified.
   They then call intern_compute_face to search
   FRAME->display.x->computed_faces for a matching face, add one if
   none is found, and return the index into
   FRAME->display.x->computed_faces.  FRAME's glyph matrices use these
   indices to record the faces of the matrix characters, and the X
   display hooks consult compute_faces to decide how to display these
   characters.  Elements 0 and 1 of computed_faces always describe the
   default and mode-line faces.

   Each computed face belongs to a particular frame.

   Computed faces have graphics contexts some of the time.
   intern_face builds a GC for a specified computed face
   if it doesn't have one already.
   clear_face_cache clears out the GCs of all computed faces.
   This is done from time to time so that we don't hold on to
   lots of GCs that are no longer needed.

   Constraints:

   Symbols naming faces must have associations on all frames; for any
   FRAME, for all FACE-NAME, if (assq FACE-NAME (frame-face-alist
   FRAME)) is non-nil, it must be non-nil for all frames.

   Analogously, indices into param_faces must be valid on all frames;
   if param_faces[i] is a non-zero face pointer on one frame, then it
   must be filled in on all frames.  Code assumes that face ID's can
   be used on any frame.

   Some subtleties:
   
   Why do we keep param_faces and computed_faces separate?
   computed_faces contains an element for every combination of facial
   parameters we have ever displayed.  indices into param_faces have
   to be valid on all frames.  If they were the same array, then that
   array would grow very large on all frames, because any facial
   combination displayed on any frame would need to be a valid entry
   on all frames.  */

/* Definitions and declarations.  */

/* The number of face-id's in use (same for all frames).  */
static int next_face_id;

/* The number of the face to use to indicate the region.  */
static int region_face;

/* This is what appears in a slot in a face to signify that the face
   does not specify that display aspect.  */
#define FACE_DEFAULT (~0)

Lisp_Object Qface, Qmouse_face;
Lisp_Object Qpixmap_spec_p;

int face_name_id_number ( /* FRAME_PTR, Lisp_Object name */ );

struct face *intern_face ( /* FRAME_PTR, struct face * */ );
static int new_computed_face ( /* FRAME_PTR, struct face * */ );
static int intern_computed_face ( /* FRAME_PTR, struct face * */ );
static void ensure_face_ready ( /* FRAME_PTR, int id */ );
void recompute_basic_faces ( /* FRAME_PTR f */ );

/* Allocating, copying, and comparing struct faces.  */

/* Allocate a new face */
static struct face *
allocate_face ()
{
  struct face *result = (struct face *) xmalloc (sizeof (struct face));
  bzero (result, sizeof (struct face));
  result->font = (XFontStruct *) FACE_DEFAULT;
  result->foreground = FACE_DEFAULT;
  result->background = FACE_DEFAULT;
  result->stipple = FACE_DEFAULT;
  return result;
}

/* Make a new face that's a copy of an existing one.  */
static struct face *
copy_face (face)
     struct face *face;
{
  struct face *result = allocate_face ();

  result->font = face->font;
  result->foreground = face->foreground;
  result->background = face->background;
  result->stipple = face->stipple;
  result->underline = face->underline;
  result->pixmap_h = face->pixmap_h;
  result->pixmap_w = face->pixmap_w;

  return result;
}

static int
face_eql (face1, face2)
     struct face *face1, *face2;
{
  return (   face1->font       == face2->font
	  && face1->foreground == face2->foreground
	  && face1->background == face2->background
	  && face1->stipple    == face2->stipple
	  && face1->underline  == face2->underline);
}

/* Managing graphics contexts of faces.  */

/* Given a computed face, construct its graphics context if necessary.  */

struct face *
intern_face (f, face)
     struct frame *f;
     struct face *face;
{
  face->gc = NULL;

  return face;
}

/* Clear out all graphics contexts for all computed faces
   except for the default and mode line faces.
   This should be done from time to time just to avoid
   keeping too many graphics contexts that are no longer needed.  */

void
clear_face_cache ()
{
/* Nothing extra */
}

/* Allocating, freeing, and duplicating fonts, colors, and pixmaps.

   These functions operate on param faces only.
   Computed faces get their fonts, colors and pixmaps
   by merging param faces.  */

static XFontStruct *
load_font (f, name)
     struct frame *f;
     Lisp_Object name;
{
  XFontStruct *font;

  if (NILP (name))
    return (XFontStruct *) FACE_DEFAULT;

  CHECK_STRING (name, 0);
  BLOCK_INPUT;
  font = win32_load_font (FRAME_WIN32_DISPLAY_INFO (f), (char *) XSTRING (name)->data);
  UNBLOCK_INPUT;

  if (! font)
    Fsignal (Qerror, Fcons (build_string ("undefined font"),
			    Fcons (name, Qnil)));
  return font;
}

static void
unload_font (f, font)
     struct frame *f;
     XFontStruct *font;
{
  if (!font || font == ((XFontStruct *) FACE_DEFAULT))
    return;

  BLOCK_INPUT;
  win32_unload_font (FRAME_WIN32_DISPLAY_INFO (f), font);
  UNBLOCK_INPUT;
}

static unsigned long
load_color (f, name)
     struct frame *f;
     Lisp_Object name;
{
  COLORREF color;
  int result;

  if (NILP (name))
    return FACE_DEFAULT;

  CHECK_STRING (name, 0);
  /* if the colormap is full, defined_color will return a best match
     to the values in an an existing cell. */
  result = defined_color(f, (char *) XSTRING (name)->data, &color, 1);
  if (! result)
    Fsignal (Qerror, Fcons (build_string ("undefined color"),
			    Fcons (name, Qnil)));
  return (unsigned long) color;
}

static void
unload_color (f, pixel)
     struct frame *f;
     unsigned long pixel;
{
}

DEFUN ("pixmap-spec-p", Fpixmap_spec_p, Spixmap_spec_p, 1, 1, 0,
  "Return t if ARG is a valid pixmap specification.")
  (arg)
     Lisp_Object arg;
{
  Lisp_Object height, width;

  return ((STRINGP (arg)
	   || (CONSP (arg)
	       && CONSP (XCONS (arg)->cdr)
	       && CONSP (XCONS (XCONS (arg)->cdr)->cdr)
	       && NILP (XCONS (XCONS (XCONS (arg)->cdr)->cdr)->cdr)
	       && (width = XCONS (arg)->car, INTEGERP (width))
	       && (height = XCONS (XCONS (arg)->cdr)->car, INTEGERP (height))
	       && STRINGP (XCONS (XCONS (XCONS (arg)->cdr)->cdr)->car)
	       && XINT (width) > 0
	       && XINT (height) > 0
	       /* The string must have enough bits for width * height.  */
	       && ((XSTRING (XCONS (XCONS (XCONS (arg)->cdr)->cdr)->car)->size
		    * (BITS_PER_INT / sizeof (int)))
		   >= XFASTINT (width) * XFASTINT (height))))
	  ? Qt : Qnil);
}

/* Load a bitmap according to NAME (which is either a file name
   or a pixmap spec).  Return the bitmap_id (see xfns.c)
   or get an error if NAME is invalid.

   Store the bitmap width in *W_PTR and height in *H_PTR.  */

static long
load_pixmap (f, name, w_ptr, h_ptr)
     FRAME_PTR f;
     Lisp_Object name;
     unsigned int *w_ptr, *h_ptr;
{
  int bitmap_id;
  Lisp_Object tem;

  if (NILP (name))
    return FACE_DEFAULT;

  tem = Fpixmap_spec_p (name);
  if (NILP (tem))
    wrong_type_argument (Qpixmap_spec_p, name);

  BLOCK_INPUT;

  if (CONSP (name))
    {
      /* Decode a bitmap spec into a bitmap.  */

      int h, w;
      Lisp_Object bits;

      w = XINT (Fcar (name));
      h = XINT (Fcar (Fcdr (name)));
      bits = Fcar (Fcdr (Fcdr (name)));

      bitmap_id = x_create_bitmap_from_data (f, XSTRING (bits)->data,
					     w, h);
    }
  else
    {
      /* It must be a string -- a file name.  */
      bitmap_id = x_create_bitmap_from_file (f, name);
    }
  UNBLOCK_INPUT;

  if (bitmap_id < 0)
    Fsignal (Qerror, Fcons (build_string ("invalid or undefined bitmap"),
			    Fcons (name, Qnil)));

  *w_ptr = x_bitmap_width (f, bitmap_id);
  *h_ptr = x_bitmap_height (f, bitmap_id);

  return bitmap_id;
}


/* Managing parameter face arrays for frames. */

void
init_frame_faces (f)
     FRAME_PTR f;
{
  ensure_face_ready (f, 0);
  ensure_face_ready (f, 1);

  FRAME_N_COMPUTED_FACES (f) = 0;
  FRAME_SIZE_COMPUTED_FACES (f) = 0;

  new_computed_face (f, FRAME_PARAM_FACES (f)[0]);
  new_computed_face (f, FRAME_PARAM_FACES (f)[1]);
  recompute_basic_faces (f);

#ifdef MULTI_FRAME
  /* Find another frame.  */
  {
    Lisp_Object tail, frame, result;
    
    result = Qnil;
    FOR_EACH_FRAME (tail, frame)
      if (FRAME_WIN32_P (XFRAME (frame))
	  && XFRAME (frame) != f)
	{
	  result = frame;
	  break;
	}

    /* If we didn't find any X frames other than f, then we don't need
       any faces other than 0 and 1, so we're okay.  Otherwise, make
       sure that all faces valid on the selected frame are also valid
       on this new frame.  */
    if (FRAMEP (result))
      {
	int i;
	int n_faces = FRAME_N_PARAM_FACES (XFRAME (result));
	struct face **faces = FRAME_PARAM_FACES (XFRAME (result));

	for (i = 2; i < n_faces; i++)
	  if (faces[i])
	    ensure_face_ready (f, i);
      }
  }
#endif /* MULTI_FRAME */
}


/* Called from Fdelete_frame.  */

void
free_frame_faces (f)
     struct frame *f;
{
  int i;

  BLOCK_INPUT;

  for (i = 0; i < FRAME_N_PARAM_FACES (f); i++)
    {
      struct face *face = FRAME_PARAM_FACES (f) [i];
      if (face)
	{
	  unload_font (f, face->font);
	  unload_color (f, face->foreground);
	  unload_color (f, face->background);
	  x_destroy_bitmap (f, face->stipple);
	  xfree (face);
	}
    }
  xfree (FRAME_PARAM_FACES (f));
  FRAME_PARAM_FACES (f) = 0;
  FRAME_N_PARAM_FACES (f) = 0;

  /* All faces in FRAME_COMPUTED_FACES use resources copied from
     FRAME_PARAM_FACES; we can free them without fuss.
     But we do free the GCs and the face objects themselves.  */
  for (i = 0; i < FRAME_N_COMPUTED_FACES (f); i++)
    {
      struct face *face = FRAME_COMPUTED_FACES (f) [i];
      if (face)
	{
	  xfree (face);
	}
    }
  xfree (FRAME_COMPUTED_FACES (f));
  FRAME_COMPUTED_FACES (f) = 0;
  FRAME_N_COMPUTED_FACES (f) = 0;

  UNBLOCK_INPUT;
}

/* Interning faces in a frame's face array.  */

static int
new_computed_face (f, new_face)
     struct frame *f;
     struct face *new_face;
{
  int i = FRAME_N_COMPUTED_FACES (f);

  if (i >= FRAME_SIZE_COMPUTED_FACES (f))
    {
      int new_size = i + 32;

      FRAME_COMPUTED_FACES (f)
	= (struct face **) (FRAME_SIZE_COMPUTED_FACES (f) == 0
			    ? xmalloc (new_size * sizeof (struct face *))
			    : xrealloc (FRAME_COMPUTED_FACES (f),
					new_size * sizeof (struct face *)));
      FRAME_SIZE_COMPUTED_FACES (f) = new_size;
    }

  i = FRAME_N_COMPUTED_FACES (f)++;
  FRAME_COMPUTED_FACES (f)[i] = copy_face (new_face);
  return i;
}


/* Find a match for NEW_FACE in a FRAME's computed face array, and add
   it if we don't find one.  */
static int
intern_computed_face (f, new_face)
     struct frame *f;
     struct face *new_face;
{
  int len = FRAME_N_COMPUTED_FACES (f);
  int i;

  /* Search for a computed face already on F equivalent to FACE.  */
  for (i = 0; i < len; i++)
    {
      if (! FRAME_COMPUTED_FACES (f)[i])
	abort ();
      if (face_eql (new_face, FRAME_COMPUTED_FACES (f)[i]))
	return i;
    }

  /* We didn't find one; add a new one.  */
  return new_computed_face (f, new_face);
}

/* Make parameter face id ID valid on frame F.  */

static void
ensure_face_ready (f, id)
     struct frame *f;
     int id;
{
  if (FRAME_N_PARAM_FACES (f) <= id)
    {
      int n = id + 10;
      int i;
      if (!FRAME_N_PARAM_FACES (f))
	FRAME_PARAM_FACES (f)
	  = (struct face **) xmalloc (sizeof (struct face *) * n);
      else
	FRAME_PARAM_FACES (f)
	  = (struct face **) xrealloc (FRAME_PARAM_FACES (f),
				       sizeof (struct face *) * n);

      bzero (FRAME_PARAM_FACES (f) + FRAME_N_PARAM_FACES (f),
	     (n - FRAME_N_PARAM_FACES (f)) * sizeof (struct face *));
      FRAME_N_PARAM_FACES (f) = n;
    }

  if (FRAME_PARAM_FACES (f) [id] == 0)
    FRAME_PARAM_FACES (f) [id] = allocate_face ();
}

/* Return non-zero if FONT1 and FONT2 have the same width.
   We do not check the height, because we can now deal with
   different heights.
   We assume that they're both character-cell fonts.  */

int
same_size_fonts (font1, font2)
     XFontStruct *font1, *font2;
{
  return (FONT_WIDTH(font1) == FONT_WIDTH(font2));
}

/* Update the line_height of frame F according to the biggest font in
   any face.  Return nonzero if if line_height changes.  */

int
frame_update_line_height (f)
     FRAME_PTR f;
{
  int i;
  int biggest = FONT_HEIGHT (f->output_data.win32->font);

  for (i = 0; i < f->output_data.win32->n_param_faces; i++)
    if (f->output_data.win32->param_faces[i] != 0
	&& f->output_data.win32->param_faces[i]->font != (XFontStruct *) FACE_DEFAULT)
      {
	int height = FONT_HEIGHT (f->output_data.win32->param_faces[i]->font);
	if (height > biggest)
	  biggest = height;
      }

  if (biggest == f->output_data.win32->line_height)
    return 0;

  f->output_data.win32->line_height = biggest;
  return 1;
}

/* Modify face TO by copying from FROM all properties which have
   nondefault settings.  */

static void 
merge_faces (from, to)
     struct face *from, *to;
{
  /* Only merge the font if it's the same width as the base font.
     Otherwise ignore it, since we can't handle it properly.  */
  if (from->font != (XFontStruct *) FACE_DEFAULT
      && same_size_fonts (from->font, to->font))
    to->font = from->font;
  if (from->foreground != FACE_DEFAULT)
    to->foreground = from->foreground;
  if (from->background != FACE_DEFAULT)
    to->background = from->background;
  if (from->stipple != FACE_DEFAULT)
    {
      to->stipple = from->stipple;
      to->pixmap_h = from->pixmap_h;
      to->pixmap_w = from->pixmap_w;
    }
  if (from->underline)
    to->underline = from->underline;
}

/* Set up the basic set of facial parameters, based on the frame's
   data; all faces are deltas applied to this.  */

static void
compute_base_face (f, face)
     FRAME_PTR f;
     struct face *face;
{
  face->gc = 0;
  face->foreground = FRAME_FOREGROUND_PIXEL (f);
  face->background = FRAME_BACKGROUND_PIXEL (f);
  face->font = FRAME_FONT (f);
  face->stipple = 0;
  face->underline = 0;
}

/* Return the face ID to use to display a special glyph which selects
   FACE_CODE as the face ID, assuming that ordinarily the face would
   be CURRENT_FACE.  F is the frame.  */

int
compute_glyph_face (f, face_code, current_face)
     struct frame *f;
     int face_code, current_face;
{
  struct face face;

  face = *FRAME_COMPUTED_FACES (f)[current_face];

  if (face_code >= 0 && face_code < FRAME_N_PARAM_FACES (f)
      && FRAME_PARAM_FACES (f) [face_code] != 0)
    merge_faces (FRAME_PARAM_FACES (f) [face_code], &face);

  return intern_computed_face (f, &face);
}

/* Return the face ID to use to display a special glyph which selects
   FACE_CODE as the face ID, assuming that ordinarily the face would
   be CURRENT_FACE.  F is the frame.  */

int
compute_glyph_face_1 (f, face_name, current_face)
     struct frame *f;
     Lisp_Object face_name;
     int current_face;
{
  struct face face;

  face = *FRAME_COMPUTED_FACES (f)[current_face];

  if (!NILP (face_name))
    {
      int facecode = face_name_id_number (f, face_name);
      if (facecode >= 0 && facecode < FRAME_N_PARAM_FACES (f)
	  && FRAME_PARAM_FACES (f) [facecode] != 0)
	merge_faces (FRAME_PARAM_FACES (f) [facecode], &face);
    }

  return intern_computed_face (f, &face);
}

/* Return the face ID associated with a buffer position POS.
   Store into *ENDPTR the position at which a different face is needed.
   This does not take account of glyphs that specify their own face codes.
   F is the frame in use for display, and W is a window displaying
   the current buffer.

   REGION_BEG, REGION_END delimit the region, so it can be highlighted.

   LIMIT is a position not to scan beyond.  That is to limit
   the time this function can take.

   If MOUSE is nonzero, use the character's mouse-face, not its face.  */

int
compute_char_face (f, w, pos, region_beg, region_end, endptr, limit, mouse)
     struct frame *f;
     struct window *w;
     int pos;
     int region_beg, region_end;
     int *endptr;
     int limit;
     int mouse;
{
  struct face face;
  Lisp_Object prop, position;
  int i, j, noverlays;
  int facecode;
  Lisp_Object *overlay_vec;
  Lisp_Object frame;
  int endpos;
  Lisp_Object propname;

  /* W must display the current buffer.  We could write this function
     to use the frame and buffer of W, but right now it doesn't.  */
  if (XBUFFER (w->buffer) != current_buffer)
    abort ();

  XSETFRAME (frame, f);

  endpos = ZV;
  if (pos < region_beg && region_beg < endpos)
    endpos = region_beg;

  XSETFASTINT (position, pos);

  if (mouse)
    propname = Qmouse_face;
  else
    propname = Qface;

  prop = Fget_text_property (position, propname, w->buffer);

  {
    Lisp_Object limit1, end;

    XSETFASTINT (limit1, (limit < endpos ? limit : endpos));
    end = Fnext_single_property_change (position, propname, w->buffer, limit1);
    if (INTEGERP (end))
      endpos = XINT (end);
  }

  {
    int next_overlay;
    int len;

    /* First try with room for 40 overlays.  */
    len = 40;
    overlay_vec = (Lisp_Object *) alloca (len * sizeof (Lisp_Object));
    
    noverlays = overlays_at (pos, 0, &overlay_vec, &len,
			     &next_overlay, (int *) 0);

    /* If there are more than 40,
       make enough space for all, and try again.  */
    if (noverlays > len)
      {
	len = noverlays;
	overlay_vec = (Lisp_Object *) alloca (len * sizeof (Lisp_Object));
	noverlays = overlays_at (pos, 0, &overlay_vec, &len,
				 &next_overlay, (int *) 0);
      }

    if (next_overlay < endpos)
      endpos = next_overlay;
  }

  *endptr = endpos;

  /* Optimize the default case.  */
  if (noverlays == 0 && NILP (prop)
      && !(pos >= region_beg && pos < region_end))
    return 0;

  compute_base_face (f, &face);

  if (CONSP (prop))
    {
      /* We have a list of faces, merge them in reverse order */
      Lisp_Object length = Flength (prop);
      int len = XINT (length);
      Lisp_Object *faces;

      /* Put them into an array */
      faces = (Lisp_Object *) alloca (len * sizeof (Lisp_Object));
      for (j = 0; j < len; j++)
	{
	  faces[j] = Fcar (prop);
	  prop = Fcdr (prop);
	}
      /* So that we can merge them in the reverse order */
      for (j = len - 1; j >= 0; j--)
	{
	  facecode = face_name_id_number (f, faces[j]);
	  if (facecode >= 0 && facecode < FRAME_N_PARAM_FACES (f)
	      && FRAME_PARAM_FACES (f) [facecode] != 0)
	    merge_faces (FRAME_PARAM_FACES (f) [facecode], &face);
	}
    }
  else if (!NILP (prop))
    {
      facecode = face_name_id_number (f, prop);
      if (facecode >= 0 && facecode < FRAME_N_PARAM_FACES (f)
	  && FRAME_PARAM_FACES (f) [facecode] != 0)
	merge_faces (FRAME_PARAM_FACES (f) [facecode], &face);
    }

  noverlays = sort_overlays (overlay_vec, noverlays, w);

  /* Now merge the overlay data in that order.  */
  for (i = 0; i < noverlays; i++)
    {
      prop = Foverlay_get (overlay_vec[i], propname);
      if (CONSP (prop))
	{
	  /* We have a list of faces, merge them in reverse order */
	  Lisp_Object length = Flength (prop);
	  int len = XINT (length);
	  Lisp_Object *faces;
	  int i;

	  /* Put them into an array */
	  faces = (Lisp_Object *) alloca (len * sizeof (Lisp_Object));
	  for (j = 0; j < len; j++)
	    {
	      faces[j] = Fcar (prop);
	      prop = Fcdr (prop);
	    }
	  /* So that we can merge them in the reverse order */
	  for (j = len - 1; j >= 0; j--)
	    {
	      facecode = face_name_id_number (f, faces[j]);
	      if (facecode >= 0 && facecode < FRAME_N_PARAM_FACES (f)
		  && FRAME_PARAM_FACES (f) [facecode] != 0)
		merge_faces (FRAME_PARAM_FACES (f) [facecode], &face);
	    }
	}
      else if (!NILP (prop))
	{
	  Lisp_Object oend;
	  int oendpos;

	  facecode = face_name_id_number (f, prop);
	  if (facecode >= 0 && facecode < FRAME_N_PARAM_FACES (f)
	      && FRAME_PARAM_FACES (f) [facecode] != 0)
	    merge_faces (FRAME_PARAM_FACES (f)[facecode], &face);

	  oend = OVERLAY_END (overlay_vec[i]);
	  oendpos = OVERLAY_POSITION (oend);
	  if (oendpos < endpos)
	    endpos = oendpos;
	}
    }

  if (pos >= region_beg && pos < region_end)
    {
      if (region_end < endpos)
	endpos = region_end;
      if (region_face >= 0 && region_face < next_face_id)
	merge_faces (FRAME_PARAM_FACES (f)[region_face], &face);
    }

  *endptr = endpos;

  return intern_computed_face (f, &face);
}

/* Recompute the GC's for the default and modeline faces.
   We call this after changing frame parameters on which those GC's
   depend.  */

void
recompute_basic_faces (f)
     FRAME_PTR f;
{
  /* If the frame's faces haven't been initialized yet, don't worry about
     this stuff.  */
  if (FRAME_N_PARAM_FACES (f) < 2)
    return;

  BLOCK_INPUT;

  compute_base_face (f, FRAME_DEFAULT_FACE (f));
  compute_base_face (f, FRAME_MODE_LINE_FACE (f));

  merge_faces (FRAME_DEFAULT_PARAM_FACE (f), FRAME_DEFAULT_FACE (f));
  merge_faces (FRAME_MODE_LINE_PARAM_FACE (f), FRAME_MODE_LINE_FACE (f));
  
  intern_face (f, FRAME_DEFAULT_FACE (f));
  intern_face (f, FRAME_MODE_LINE_FACE (f));

  UNBLOCK_INPUT;
}



/* Lisp interface. */

DEFUN ("frame-face-alist", Fframe_face_alist, Sframe_face_alist, 1, 1, 0,
       "")
     (frame)
     Lisp_Object frame;
{
  CHECK_FRAME (frame, 0);
  return XFRAME (frame)->face_alist;
}

DEFUN ("set-frame-face-alist", Fset_frame_face_alist, Sset_frame_face_alist,
       2, 2, 0, "")
     (frame, value)
     Lisp_Object frame, value;
{
  CHECK_FRAME (frame, 0);
  XFRAME (frame)->face_alist = value;
  return value;
}


DEFUN ("make-face-internal", Fmake_face_internal, Smake_face_internal, 1, 1, 0,
  "Create face number FACE-ID on all frames.")
  (face_id)
     Lisp_Object face_id;
{
  Lisp_Object rest, frame;
  int id = XINT (face_id);

  CHECK_NUMBER (face_id, 0);
  if (id < 0 || id >= next_face_id)
    error ("Face id out of range");

  FOR_EACH_FRAME (rest, frame)
    {
      if (FRAME_WIN32_P (XFRAME (frame)))
	ensure_face_ready (XFRAME (frame), id);
    }
  return Qnil;
}


DEFUN ("set-face-attribute-internal", Fset_face_attribute_internal,
       Sset_face_attribute_internal, 4, 4, 0, "")
     (face_id, attr_name, attr_value, frame)
     Lisp_Object face_id, attr_name, attr_value, frame;
{
  struct face *face;
  struct frame *f;
  int magic_p;
  int id;
  int garbaged = 0;

  CHECK_FRAME (frame, 0);
  CHECK_NUMBER (face_id, 0);
  CHECK_SYMBOL (attr_name, 0);

  f = XFRAME (frame);
  id = XINT (face_id);
  if (id < 0 || id >= next_face_id)
    error ("Face id out of range");

  if (! FRAME_WIN32_P (f))
    return Qnil;

  ensure_face_ready (f, id);
  face = FRAME_PARAM_FACES (f) [XFASTINT (face_id)];

  if (EQ (attr_name, intern ("font")))
    {
      XFontStruct *font = load_font (f, attr_value);
      if (face->font != f->output_data.win32->font)
	unload_font (f, face->font);
      face->font = font;
      if (frame_update_line_height (f))
	x_set_window_size (f, 0, f->width, f->height);
      /* Must clear cache, since it might contain the font
	 we just got rid of.  */
      garbaged = 1;
    }
  else if (EQ (attr_name, intern ("foreground")))
    {
      unsigned long new_color = load_color (f, attr_value);
      unload_color (f, face->foreground);
      face->foreground = new_color;
      garbaged = 1;
    }
  else if (EQ (attr_name, intern ("background")))
    {
      unsigned long new_color = load_color (f, attr_value);
      unload_color (f, face->background);
      face->background = new_color;
      garbaged = 1;
    }
  else if (EQ (attr_name, intern ("background-pixmap")))
    {
      unsigned int w, h;
      unsigned long new_pixmap = load_pixmap (f, attr_value, &w, &h);
      x_destroy_bitmap (f, face->stipple);
      face->stipple = (Pixmap) new_pixmap;
      face->pixmap_w = w;
      face->pixmap_h = h;
      garbaged = 1;
    }
  else if (EQ (attr_name, intern ("underline")))
    {
      int new = !NILP (attr_value);
      face->underline = new;
    }
  else
    error ("unknown face attribute");

  if (id == 0 || id == 1)
    recompute_basic_faces (f);

  /* We must redraw the frame whenever any face font or color changes,
     because it's possible that a merged (display) face
     contains the font or color we just replaced.
     And we must inhibit any Expose events until the redraw is done,
     since they would try to use the invalid display faces.  */
  if (garbaged)
    SET_FRAME_GARBAGED (f);

  return Qnil;
}

DEFUN ("internal-next-face-id", Finternal_next_face_id, Sinternal_next_face_id,
  0, 0, 0, "")
  ()
{
  return make_number (next_face_id++);
}

/* Return the face id for name NAME on frame FRAME.
   (It should be the same for all frames,
   but it's as easy to use the "right" frame to look it up
   as to use any other one.)  */

int
face_name_id_number (f, name)
     FRAME_PTR f;
     Lisp_Object name;
{
  Lisp_Object tem;

  tem = Fcdr (assq_no_quit (name, f->face_alist));
  if (NILP (tem))
    return 0;
  CHECK_VECTOR (tem, 0);
  tem = XVECTOR (tem)->contents[2];
  CHECK_NUMBER (tem, 0);
  return XINT (tem);
}

/* Emacs initialization.  */

void
syms_of_win32faces ()
{
  Qface = intern ("face");
  staticpro (&Qface);
  Qmouse_face = intern ("mouse-face");
  staticpro (&Qmouse_face);
  Qpixmap_spec_p = intern ("pixmap-spec-p");
  staticpro (&Qpixmap_spec_p);

  DEFVAR_INT ("region-face", &region_face,
    "Face number to use to highlight the region\n\
The region is highlighted with this face\n\
when Transient Mark mode is enabled and the mark is active.");

  defsubr (&Spixmap_spec_p);
  defsubr (&Sframe_face_alist);
  defsubr (&Sset_frame_face_alist);
  defsubr (&Smake_face_internal);
  defsubr (&Sset_face_attribute_internal);
  defsubr (&Sinternal_next_face_id);
}