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
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
|
/* vga-dynafont.c - Dynamic font handling for VGA cards.
Copyright (C) 2002, 2010 Free Software Foundation, Inc.
Written by Marcus Brinkmann.
This file is part of the GNU Hurd.
The GNU Hurd 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.
The GNU Hurd 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 this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */
#include <stddef.h>
#include <assert.h>
#include <malloc.h>
#include <wchar.h>
#include <stdlib.h>
#include <hurd/ihash.h>
#include <string.h>
#include <hurd/console.h>
#include "vga-hw.h"
#include "vga-support.h"
#include "bdf.h"
#include "vga-dynafont.h"
#include "unicode.h"
/* The currently active (visible) dynafont. The original idea was to
use some sort of caching for multiple dynafonts using the 8 font
buffers on the graphic card, but the new idea is to share a common
state among all virtual consoles and do a full refresh on
switching. However, bits and pieces of the old idea are still
present, in case they become useful. */
static dynafont_t active_dynafont;
/* One glyph in a VGA font is 8 pixels wide and 32 pixels high. Only
the first N lines are visible, and N depends on the VGA register
settings. */
typedef char vga_font_glyph[VGA_FONT_HEIGHT];
/* For each glyph in the VGA font, one instance of this structure is
held in the dynafont. */
struct mapped_character
{
/* Reference count of the mapped character. If this drops zero, we
can remove the mapping at any time. */
int refs;
/* Remember the character this glyph belongs to, so the glyph can be
reloaded when the font is changed. This is actually a wchar_t
with some text attributes mixed into the high bits. */
#define WCHAR_BOLD ((wchar_t) 0x20000000)
#define WCHAR_ITALIC ((wchar_t) 0x10000000)
#define WCHAR_MASK CONS_WCHAR_MASK
wchar_t character;
/* Used by libihash for fast removal of elements. */
hurd_ihash_locp_t locp;
};
struct dynafont
{
/* The sorted font to take the glyphs from. */
bdf_font_t font;
/* The sorted font to take the italic glyphs from. */
bdf_font_t font_italic;
/* The sorted font to take the bold glyphs from. */
bdf_font_t font_bold;
/* The sorted font to take the bold and italic glyphs from. */
bdf_font_t font_bold_italic;
/* The size of the VGA font (256 or 512). Must be a power of 2! */
int size;
/* A hash containing a pointer to a struct mapped_character for each
UCS-4 character we map to a VGA font index. */
struct hurd_ihash charmap;
/* The struct mapped_characters are preallocated for all vga font
index values. This points to an array of SIZE such elements. */
struct mapped_character *charmap_data;
/* The last vga font index that had been free (or could be
reused). */
int vga_font_last_free_index;
/* The number of free slots in the VGA font. */
int vga_font_free_indices;
int use_lgc;
/* The last vga font index that had been free (or could be reused)
for horizontal line graphic characters. */
int vga_font_last_free_index_lgc;
/* The number of free slots in the VGA font for horizontal line
graphic charactes. */
int vga_font_free_indices_lgc;
/* The font memory as stored on the card. */
vga_font_glyph *vga_font;
/* The cursor size, standout or normal. */
int cursor_standout;
};
/* The VGA standard font follows IBM code page 437. The following
table maps this to unicode. For simplicity, a 1:1 mapping is
assumed. Ambiguities are special cased in create_system_font. */
static
wchar_t ibm437_to_unicode[VGA_FONT_SIZE] = {
0, /* 0x00 */
UNICODE_WHITE_SMILING_FACE, /* 0x01 */
UNICODE_BLACK_SMILING_FACE, /* 0x02 */
UNICODE_BLACK_HEART_SUIT, /* 0x03 */
UNICODE_BLACK_DIAMOND_SUIT, /* 0x04 */
UNICODE_BLACK_CLUB_SUIT, /* 0x05 */
UNICODE_BLACK_SPADE_SUIT, /* 0x06 */
UNICODE_BULLET, /* 0x07 */
UNICODE_INVERSE_BULLET, /* 0x08 */
UNICODE_WHITE_CIRCLE, /* 0x09 */
UNICODE_INVERSE_WHITE_CIRCLE, /* 0x0a */
UNICODE_MALE_SIGN, /* 0x0b */
UNICODE_FEMALE_SIGN, /* 0x0c */
UNICODE_EIGHTH_NOTE, /* 0x0d */
UNICODE_BEAMED_EIGHTH_NOTES, /* 0x0e */
UNICODE_WHITE_SUN_WITH_RAYS, /* 0x0f */
UNICODE_BLACK_RIGHT_POINTING_TRIANGLE, /* 0x10 */
UNICODE_BLACK_LEFT_POINTING_TRIANGLE, /* 0x11 */
UNICODE_UP_DOWN_ARROW, /* 0x12 */
UNICODE_DOUBLE_EXCLAMATION_MARK, /* 0x13 */
UNICODE_PILCROW_SIGN, /* 0x14 */
UNICODE_SECTION_SIGN, /* 0x15 */
UNICODE_BLACK_RECTANGLE, /* 0x16 */
UNICODE_UP_DOWN_ARROW_WITH_BASE, /* 0x17 */
UNICODE_UPWARDS_ARROW, /* 0x18 */
UNICODE_DOWNWARDS_ARROW, /* 0x19 */
UNICODE_RIGHTWARDS_ARROW, /* 0x1a */
UNICODE_LEFTWARDS_ARROW, /* 0x1b */
UNICODE_RIGHT_ANGLE, /* 0x1c */
UNICODE_LEFT_RIGHT_ARROW, /* 0x1d */
UNICODE_BLACK_UP_POINTING_TRIANGLE, /* 0x1e */
UNICODE_BLACK_DOWN_POINTING_TRIANGLE, /* 0x1f */
' ', '!', '"', '#', '$', '%', '&', '\'', /* 0x20 - 0x27 */
'(', ')', '*', '+', ',', '-', '.', '/', /* 0x28 - 0x2f */
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', /* 0x30 - 0x37 */
':', ';', '<', '=', '>', '?', /* 0x38 - 0x3f */
'@', 'A', 'B', 'C', 'D', 'E', 'F', 'G', /* 0x40 - 0x47 */
'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', /* 0x48 - 0x4f */
'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', /* 0x50 - 0x57 */
'X', 'Y', 'Z', '[', '\\', ']', '^', '_', /* 0x58 - 0x5f */
'`', 'a', 'b', 'c', 'd', 'e', 'f', 'g', /* 0x60 - 0x67 */
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', /* 0x68 - 0x6f */
'p', 'q', 'r', 's', 't', 'u', 'v', 'w', /* 0x70 - 0x77 */
'x', 'y', 'z', '{', '|', '}', '~', UNICODE_HOUSE, /* 0x78 - 0x7f */
UNICODE_LATIN_CAPITAL_LETTER_C_WITH_CEDILLA, /* 0x80 */
UNICODE_LATIN_SMALL_LETTER_U_WITH_DIARESIS, /* 0x81 */
UNICODE_LATIN_SMALL_LETTER_E_WITH_ACUTE, /* 0x82 */
UNICODE_LATIN_SMALL_LETTER_A_WITH_CIRCUMFLEX, /* 0x83 */
UNICODE_LATIN_SMALL_LETTER_A_WITH_DIARESIS, /* 0x84 */
UNICODE_LATIN_SMALL_LETTER_A_WITH_GRAVE, /* 0x85 */
UNICODE_LATIN_SMALL_LETTER_A_WITH_RING_ABOVE, /* 0x86 */
UNICODE_LATIN_SMALL_LETTER_C_WITH_CEDILLA, /* 0x87 */
UNICODE_LATIN_SMALL_LETTER_E_WITH_CIRCUMFLEX, /* 0x88 */
UNICODE_LATIN_SMALL_LETTER_E_WITH_DIARESIS, /* 0x89 */
UNICODE_LATIN_SMALL_LETTER_E_WITH_GRAVE, /* 0x8a */
UNICODE_LATIN_SMALL_LETTER_I_WITH_DIARESIS, /* 0x8b */
UNICODE_LATIN_SMALL_LETTER_I_WITH_CIRCUMFLEX, /* 0x8c */
UNICODE_LATIN_SMALL_LETTER_I_WITH_GRAVE, /* 0x8d */
UNICODE_LATIN_CAPITAL_LETTER_A_WITH_DIARESIS, /* 0x8e */
UNICODE_LATIN_CAPITAL_LETTER_A_WITH_RING_ABOVE, /* 0x8f */
UNICODE_LATIN_CAPITAL_LETTER_E_WITH_ACUTE, /* 0x90 */
UNICODE_LATIN_SMALL_LETTER_AE, /* 0x91 */
UNICODE_LATIN_CAPITAL_LETTER_AE, /* 0x92 */
UNICODE_LATIN_SMALL_LETTER_O_WITH_CIRCUMFLEX, /* 0x93 */
UNICODE_LATIN_SMALL_LETTER_O_WITH_DIARESIS, /* 0x94 */
UNICODE_LATIN_SMALL_LETTER_O_WITH_GRAVE, /* 0x95 */
UNICODE_LATIN_SMALL_LETTER_U_WITH_CIRCUMFLEX, /* 0x96 */
UNICODE_LATIN_SMALL_LETTER_U_WITH_GRAVE, /* 0x97 */
UNICODE_LATIN_SMALL_LETTER_Y_WITH_DIARESIS, /* 0x98 */
UNICODE_LATIN_CAPITAL_LETTER_O_WITH_DIARESIS, /* 0x99 */
UNICODE_LATIN_CAPITAL_LETTER_U_WITH_DIARESIS, /* 0x9a */
UNICODE_CENT_SIGN, /* 0x9b */
UNICODE_POUND_SIGN, /* 0x9c */
UNICODE_YEN_SIGN, /* 0x9d */
UNICODE_PESETA_SIGN, /* 0x9e */
UNICODE_LATIN_SMALL_LETTER_F_WITH_HOOK, /* 0x9f */
UNICODE_LATIN_SMALL_LETTER_A_WITH_ACUTE, /* 0xa0 */
UNICODE_LATIN_SMALL_LETTER_I_WITH_ACUTE, /* 0xa1 */
UNICODE_LATIN_SMALL_LETTER_O_WITH_ACUTE, /* 0xa2 */
UNICODE_LATIN_SMALL_LETTER_U_WITH_ACUTE, /* 0xa3 */
UNICODE_LATIN_SMALL_LETTER_N_WITH_TILDE, /* 0xa4 */
UNICODE_LATIN_CAPITAL_LETTER_N_WITH_TILDE, /* 0xa5 */
UNICODE_FEMININE_ORDINAL_INDICATOR, /* 0xa6 */
UNICODE_MASCULINE_ORDINAL_INDICATOR, /* 0xa7 */
UNICODE_INVERTED_QUESTION_MARK, /* 0xa8 */
UNICODE_REVERSED_NOT_SIGN, /* 0xa9 */
UNICODE_NOT_SIGN, /* 0xaa */
UNICODE_VULGAR_FRACTION_ONE_HALF, /* 0xab */
UNICODE_VULGAR_FRACTION_ONE_QUARTER, /* 0xac */
UNICODE_INVERTED_EXCLAMATION_MARK, /* 0xad */
UNICODE_LEFT_POINTING_DOUBLE_ANGLE_QUOTATION_MARK, /* 0xae */
UNICODE_RIGHT_POINTING_DOUBLE_ANGLE_QUOTATION_MARK, /* 0xaf */
UNICODE_LIGHT_SHADE, /* 0xb0 */
UNICODE_MEDIUM_SHADE, /* 0xb1 */
UNICODE_DARK_SHADE, /* 0xb2 */
UNICODE_BOX_DRAWINGS_LIGHT_VERTICAL, /* 0xb3 */
UNICODE_BOX_DRAWINGS_LIGHT_VERTICAL_AND_LEFT, /* 0xb4 */
UNICODE_BOX_DRAWINGS_VERTICAL_SINGLE_AND_LEFT_DOUBLE, /* 0xb5 */
UNICODE_BOX_DRAWINGS_VERTICAL_DOUBLE_AND_LEFT_SINGLE, /* 0xb6 */
UNICODE_BOX_DRAWINGS_DOWN_DOUBLE_AND_LEFT_SINGLE, /* 0xb7 */
UNICODE_BOX_DRAWINGS_DOWN_SINGLE_AND_LEFT_DOUBLE, /* 0xb8 */
UNICODE_BOX_DRAWINGS_DOUBLE_VERTICAL_AND_LEFT, /* 0xb9 */
UNICODE_BOX_DRAWINGS_DOUBLE_VERTICAL, /* 0xba */
UNICODE_BOX_DRAWINGS_DOUBLE_DOWN_AND_LEFT, /* 0xbb */
UNICODE_BOX_DRAWINGS_DOUBLE_UP_AND_LEFT, /* 0xbc */
UNICODE_BOX_DRAWINGS_UP_DOUBLE_AND_LEFT_SINGLE, /* 0xbd */
UNICODE_BOX_DRAWINGS_UP_SINGLE_AND_LEFT_DOUBLE, /* 0xbe */
UNICODE_BOX_DRAWINGS_LIGHT_DOWN_AND_LEFT, /* 0xbf */
UNICODE_BOX_DRAWINGS_LIGHT_UP_AND_RIGHT, /* 0xc0 */
UNICODE_BOX_DRAWINGS_LIGHT_UP_AND_HORIZONTAL, /* 0xc1 */
UNICODE_BOX_DRAWINGS_LIGHT_DOWN_AND_HORIZONTAL, /* 0xc2 */
UNICODE_BOX_DRAWINGS_LIGHT_VERTICAL_AND_RIGHT, /* 0xc3 */
UNICODE_BOX_DRAWINGS_LIGHT_HORIZONTAL, /* 0xc4 */
UNICODE_BOX_DRAWINGS_LIGHT_VERTICAL_AND_HORIZONTAL, /* 0xc5 */
UNICODE_BOX_DRAWINGS_VERTICAL_SINGLE_AND_RIGHT_DOUBLE, /* 0xc6 */
UNICODE_BOX_DRAWINGS_VERTICAL_DOUBLE_AND_RIGHT_SINGLE, /* 0xc7 */
UNICODE_BOX_DRAWINGS_DOUBLE_UP_AND_RIGHT, /* 0xc8 */
UNICODE_BOX_DRAWINGS_DOUBLE_DOWN_AND_RIGHT, /* 0xc9 */
UNICODE_BOX_DRAWINGS_DOUBLE_UP_AND_HORIZONTAL, /* 0xca */
UNICODE_BOX_DRAWINGS_DOUBLE_DOWN_AND_HORIZONTAL, /* 0xcb */
UNICODE_BOX_DRAWINGS_DOUBLE_VERTICAL_AND_RIGHT, /* 0xcc */
UNICODE_BOX_DRAWINGS_DOUBLE_HORIZONTAL, /* 0xcd */
UNICODE_BOX_DRAWINGS_DOUBLE_VERTICAL_AND_HORIZONTAL,/* 0xce */
UNICODE_BOX_DRAWINGS_UP_SINGLE_AND_HORIZONTAL_DOUBLE, /* 0xcf */
UNICODE_BOX_DRAWINGS_UP_DOUBLE_AND_HORIZONTAL_SINGLE, /* 0xd0 */
UNICODE_BOX_DRAWINGS_DOWN_SINGLE_AND_HORIZONTAL_DOUBLE, /* 0xd1 */
UNICODE_BOX_DRAWINGS_DOWN_DOUBLE_AND_HORIZONTAL_SINGLE, /* 0xd2 */
UNICODE_BOX_DRAWINGS_UP_DOUBLE_AND_RIGHT_SINGLE, /* 0xd3 */
UNICODE_BOX_DRAWINGS_UP_SINGLE_AND_RIGHT_DOUBLE, /* 0xd4 */
UNICODE_BOX_DRAWINGS_DOWN_SINGLE_AND_RIGHT_DOUBLE, /* 0xd5 */
UNICODE_BOX_DRAWINGS_DOWN_DOUBLE_AND_RIGHT_SINGLE, /* 0xd6 */
UNICODE_BOX_DRAWINGS_VERTICAL_DOUBLE_AND_HORIZONTAL_SINGLE, /* 0xd7 */
UNICODE_BOX_DRAWINGS_VERTICAL_SINGLE_AND_HORIZONTAL_DOUBLE, /* 0xd8 */
UNICODE_BOX_DRAWINGS_LIGHT_UP_AND_LEFT, /* 0xd9 */
UNICODE_BOX_DRAWINGS_LIGHT_DOWN_AND_RIGHT, /* 0xda */
UNICODE_FULL_BLOCK, /* 0xdb */
UNICODE_LOWER_HALF_BLOCK, /* 0xdc */
UNICODE_LEFT_HALF_BLOCK, /* 0xdd */
UNICODE_RIGHT_HALF_BLOCK, /* 0xde */
UNICODE_UPPER_HALF_BLOCK, /* 0xdf */
UNICODE_GREEK_SMALL_LETTER_ALPHA, /* 0xe0 */
/* The next one: Also sz-ligature. */
UNICODE_GREEK_SMALL_LETTER_BETA, /* 0xe1 */
UNICODE_GREEK_CAPITAL_LETTER_GAMMA, /* 0xe2 */
UNICODE_GREEK_SMALL_LETTER_PI, /* 0xe3 */
UNICODE_GREEK_CAPITAL_LETTER_SIGMA, /* 0xe4 */
UNICODE_GREEK_SMALL_LETTER_SIGMA, /* 0xe5 */
/* The next one: Also micro. */
UNICODE_GREEK_SMALL_LETTER_MU, /* 0xe6 */
UNICODE_GREEK_SMALL_LETTER_TAU, /* 0xe7 */
UNICODE_GREEK_CAPITAL_LETTER_PHI, /* 0xe8 */
UNICODE_GREEK_CAPITAL_LETTER_OMICRON, /* 0xe9 */
UNICODE_GREEK_CAPITAL_LETTER_OMEGA, /* 0xea */
UNICODE_GREEK_SMALL_LETTER_DELTA, /* 0xeb */
UNICODE_INFINITY, /* 0xec */
UNICODE_GREEK_SMALL_LETTER_PHI, /* 0xed */
UNICODE_GREEK_SMALL_LETTER_EPSILON, /* 0xee */
UNICODE_INTERSECTION, /* 0xef */
UNICODE_IDENTICAL_TO, /* 0xf0 */
UNICODE_PLUS_MINUS_SIGN, /* 0xf1 */
UNICODE_GREATER_THAN_OR_EQUAL_TO, /* 0xf2 */
UNICODE_LESS_THAN_OR_EQUAL_TO, /* 0xf3 */
UNICODE_TOP_HALF_INTEGRAL, /* 0xf4 */
UNICODE_BOTTOM_HALF_INTEGRAL, /* 0xf5 */
UNICODE_DIVISION_SIGN, /* 0xf6 */
UNICODE_ALMOST_EQUAL_TO, /* 0xf7 */
UNICODE_DEGREE_SIGN, /* 0xf8 */
UNICODE_BULLET_OPERATOR, /* 0xf9 */
UNICODE_MIDDLE_DOT, /* 0xfa */
UNICODE_SQUARE_ROOT, /* 0xfb */
UNICODE_SUPERSCRIPT_LATIN_SMALL_LETTER, /* 0xfc */
UNICODE_SUPERSCRIPT_TWO, /* 0xfd */
UNICODE_BLACK_SQUARE, /* 0xfe */
UNICODE_NO_BREAK_SPACE /* 0xff */
};
/* Read the VGA card's memory as IBM 437 font and create a Unicode BDF
font from it. If an error occurs, errno is set and NULL is
returned. */
static bdf_font_t
create_system_font (void)
{
bdf_error_t bdferr;
bdf_font_t font;
unsigned char bitmap[VGA_FONT_SIZE][VGA_FONT_HEIGHT]; /* 8kB on stack. */
int width = vga_get_font_width ();
int i;
/* Add the glyph at position POS to the font for character
ENCODING. */
void vga_add_glyph (int pos, int encoding)
{
char name[16];
snprintf (name, sizeof (name), "VGA %i", pos);
if (width == 8)
bdferr = bdf_add_glyph (font, name, encoding,
0, 8, 16, 0, 0, bitmap[pos]);
else
{
int i;
char glyph_bitmap[32];
for (i = 0; i < 16; i++)
{
glyph_bitmap[i * 2] = bitmap[pos][i];
if (pos >= VGA_FONT_LGC_BEGIN
&& pos < VGA_FONT_LGC_BEGIN + VGA_FONT_LGC_COUNT)
glyph_bitmap[i * 2 + 1]
= (bitmap[pos][i] & 1) ? 0x80 : 0;
else
glyph_bitmap[i * 2 + 1] = 0;
}
bdferr = bdf_add_glyph (font, name, encoding,
0, 9, 16, 0, 0, glyph_bitmap);
}
}
/* The point size and resolution is arbitrary. */
bdferr = bdf_new (&font, 2, 2, "vga-system", 10, 100, 100,
width, 16, 0, 0, 0);
if (bdferr)
{
if (bdferr != BDF_SYSTEM_ERROR)
errno = EGRATUITOUS;
return NULL;
}
vga_read_font_buffer (0, 0, (unsigned char *) bitmap,
VGA_FONT_SIZE * VGA_FONT_HEIGHT);
for (i = 0; i < VGA_FONT_SIZE; i++)
if (ibm437_to_unicode[i])
{
vga_add_glyph (i, ibm437_to_unicode[i]);
if (bdferr)
break;
/* Some glyphs are ambivalent. */
if (ibm437_to_unicode[i] == UNICODE_GREEK_SMALL_LETTER_BETA)
vga_add_glyph (i, UNICODE_LATIN_SMALL_LETTER_SHARP_S);
else if (ibm437_to_unicode[i] == UNICODE_GREEK_SMALL_LETTER_MU)
vga_add_glyph (i, UNICODE_MICRO_SIGN);
if (bdferr)
break;
}
if (bdferr)
{
bdf_destroy (font);
if (bdferr != BDF_SYSTEM_ERROR)
errno = EGRATUITOUS;
return NULL;
}
return font;
}
#if QUAERENDO_INVENIETIS
#define GNU_HEAD_BEGIN (UNICODE_PRIVATE_USE_AREA + 0x0f00)
static void
add_gnu_head (bdf_font_t font)
{
#define GNU_HEAD_WIDTH 6
static unsigned char gnu_head[][GNU_HEAD_WIDTH] =
{
{ 255, 255, 255, 255, 255, 255 }, { 255, 0, 127, 255, 252, 31 },
{ 252, 0, 31, 255, 224, 7 }, { 248, 0, 7, 255, 0, 3 },
{ 240, 0, 15, 255, 128, 3 }, { 240, 31, 255, 255, 252, 1 },
{ 224, 63, 241, 255, 255, 1 }, { 192, 127, 128, 96, 255, 129 },
{ 192, 255, 0, 0, 63, 193 }, { 192, 254, 0, 0, 31, 193 },
{ 192, 252, 0, 0, 15, 193 }, { 192, 248, 0, 0, 15, 193 },
{ 192, 248, 0, 0, 7, 129 }, { 192, 96, 63, 131, 192, 1 },
{ 192, 1, 227, 98, 112, 1 }, { 192, 3, 195, 244, 176, 3 },
{ 224, 7, 221, 125, 248, 3 }, { 240, 15, 184, 124, 120, 7 },
{ 240, 15, 248, 124, 60, 15 }, { 248, 15, 220, 254, 124, 127 },
{ 252, 31, 223, 255, 254, 127 }, { 255, 159, 159, 255, 31, 191 },
{ 255, 223, 159, 255, 35, 63 }, { 255, 191, 127, 195, 152, 127 },
{ 255, 188, 255, 156, 199, 255 }, { 255, 96, 253, 134, 115, 255 },
{ 254, 134, 251, 227, 251, 255 }, { 254, 46, 254, 249, 251, 255 },
{ 255, 238, 126, 127, 231, 255 }, { 255, 239, 127, 127, 207, 255 },
{ 255, 239, 63, 63, 231, 255 }, { 255, 247, 159, 158, 15, 255 },
{ 255, 247, 207, 193, 159, 255 }, { 255, 247, 223, 255, 223, 255 },
{ 255, 243, 199, 252, 31, 255 }, { 255, 251, 227, 224, 63, 255 },
{ 255, 253, 241, 240, 255, 255 }, { 255, 252, 244, 126, 255, 255 },
{ 255, 254, 121, 122, 255, 255 }, { 255, 255, 252, 48, 255, 255 },
{ 255, 255, 252, 35, 255, 255 }, { 255, 255, 249, 1, 127, 255 },
{ 255, 255, 251, 0, 127, 255 }, { 255, 255, 255, 128, 255, 255 },
{ 255, 255, 255, 255, 255, 255 }
};
/* Height of a single glyph, truncated to fit VGA glyph slot. */
int height = (font->bbox.height > 32) ? 32 : font->bbox.height;
/* Width of a single glyph in byte. */
int width = (font->bbox.width + 7) / 8;
/* Number of rows in bitmap. */
int rows = sizeof (gnu_head) / sizeof (gnu_head[0]);
/* Number of rows of glyphs necessary. */
int nr = (rows + height - 1) / height;
int row, col;
/* Check that all those glyphs are free in the private area. */
if (nr * GNU_HEAD_WIDTH > GNU_HEAD_BEGIN - UNICODE_PRIVATE_USE_AREA + 1)
return;
for (int i = 0; i < nr * GNU_HEAD_WIDTH; i++)
if (bdf_find_glyph (font, (int) GNU_HEAD_BEGIN + i, 0)
|| bdf_find_glyph (font, -1, (int) GNU_HEAD_BEGIN + i))
return;
for (row = 0; row < nr; row++)
for (col = 0; col < GNU_HEAD_WIDTH; col++)
{
char bitmap[font->bbox.height][width];
char name[] = "GNU Head ..........";
/* strlen ("GNU Head ") == 9. */
sprintf (&name[9], "%i", row * GNU_HEAD_WIDTH + col);
memset (bitmap, 0, sizeof (bitmap));
for (int j = 0; j < height && row * height + j < rows; j++)
bitmap[j][0] = gnu_head[row * height + j][col];
if (bdf_add_glyph (font, name,
GNU_HEAD_BEGIN + row * GNU_HEAD_WIDTH + col,
0, font->bbox.width, font->bbox.height,
0, 0, (unsigned char *) bitmap))
return;
}
}
#endif
/* Create a new dynafont object, which uses glyphs from the font FONT
(which should be 8 or 9 pixels wide and 13 to 16 pixels high).
SIZE is either 256 or 512, and specifies the number of available
glyphs in the font cache. The object is returned in DYNAFONT.
The font is consumed. If FONT is the null pointer, the VGA card's
memory is converted to a font according to the VGA default map (IBM
Code Page 437). */
error_t
dynafont_new (bdf_font_t font, bdf_font_t font_italic, bdf_font_t font_bold,
bdf_font_t font_bold_italic, int size, dynafont_t *dynafont)
{
dynafont_t df;
struct bdf_glyph *glyph = NULL;
if (!font)
font = create_system_font ();
if (!font || !font->bbox.height)
return errno;
df = malloc (sizeof *df);
if (!df)
return ENOMEM;
#if QUAERENDO_INVENIETIS
add_gnu_head (font);
#endif
bdf_sort_glyphs (font);
df->font = font;
df->font_italic = font_italic;
df->font_bold = font_bold;
df->font_bold_italic = font_bold_italic;
df->size = size;
df->cursor_standout = 0;
df->charmap_data = calloc (size, sizeof (struct mapped_character));
if (!df->charmap_data)
{
free (df);
return ENOMEM;
}
df->vga_font = malloc (sizeof (vga_font_glyph) * size);
if (!df->vga_font)
{
free (df->charmap_data);
free (df);
return ENOMEM;
}
hurd_ihash_init (&df->charmap, offsetof (struct mapped_character, locp));
if (df->font->bbox.width == 9)
{
/* 32 from 256 font slots are for horizontal line graphic
characters. */
df->use_lgc = 1;
df->vga_font_free_indices = df->size
- (df->size / 256) * VGA_FONT_LGC_COUNT;
df->vga_font_last_free_index = 0;
df->vga_font_free_indices_lgc = (df->size / 256) * VGA_FONT_LGC_COUNT;
df->vga_font_last_free_index_lgc = VGA_FONT_LGC_BEGIN;
}
else
{
df->use_lgc = 0;
df->vga_font_free_indices = df->size;
df->vga_font_last_free_index = 0;
df->vga_font_free_indices_lgc = 0;
df->vga_font_last_free_index_lgc = 0;
}
/* Ensure that ASCII is always available 1-to-1, for kernel messages. */
for (int c = ' '; c <= '~'; c++)
{
glyph = bdf_find_glyph (df->font, c, 0);
if (!glyph)
glyph = bdf_find_glyph (df->font, -1, c);
if (glyph)
{
struct mapped_character *chr = &df->charmap_data[c];
df->vga_font_free_indices--;
chr->refs = 1;
for (int i = 0; i < ((glyph->bbox.height > 32)
? 32 : glyph->bbox.height); i++)
df->vga_font[c][i]
= glyph->bitmap[i * ((glyph->bbox.width + 7) / 8)];
if (glyph->bbox.height < 32)
memset (((char *) df->vga_font[c])
+ glyph->bbox.height, 0, 32 - glyph->bbox.height);
/* Update the hash table. */
hurd_ihash_add (&df->charmap, c, chr);
}
}
/* Ensure that we always have the replacement character
available. */
{
struct mapped_character *chr = &df->charmap_data[FONT_INDEX_UNKNOWN];
df->vga_font_free_indices--;
chr->refs = 1;
glyph = bdf_find_glyph (df->font, UNICODE_REPLACEMENT_CHARACTER, 0);
if (!glyph)
glyph = bdf_find_glyph (df->font, -1, UNICODE_REPLACEMENT_CHARACTER);
if (glyph)
{
for (int i = 0; i < ((glyph->bbox.height > 32)
? 32 : glyph->bbox.height); i++)
df->vga_font[FONT_INDEX_UNKNOWN][i]
= glyph->bitmap[i * ((glyph->bbox.width + 7) / 8)];
if (glyph->bbox.height < 32)
memset (((char *) df->vga_font[FONT_INDEX_UNKNOWN])
+ glyph->bbox.height, 0, 32 - glyph->bbox.height);
/* Update the hash table. */
hurd_ihash_add (&df->charmap, UNICODE_REPLACEMENT_CHARACTER, chr);
}
else
{
int i;
char *gl = df->vga_font[FONT_INDEX_UNKNOWN];
/* XXX Take font height into account. */
gl[0] = 0x7E; /* ****** */
gl[1] = 0xC3; /* ** ** */
gl[2] = 0x99; /* * ** * */
gl[3] = 0x99; /* * ** * */
gl[4] = 0xF9; /* ***** * */
gl[5] = 0xF3; /* **** ** */
gl[6] = 0xF3; /* *** *** */
gl[7] = 0xE7; /* *** *** */
gl[8] = 0xFF; /* ******** */
gl[9] = 0xE7; /* *** *** */
gl[10] = 0xE7; /* *** *** */
gl[11] = 0x7E; /* ****** */
for (i = 12; i < 32; i++)
gl[i] = 0;
}
}
*dynafont = df;
return 0;
}
/* Release a dynafont object and its associated resources. */
void
dynafont_free (dynafont_t df)
{
if (active_dynafont == df)
active_dynafont = NULL;
bdf_destroy (df->font);
if (df->font_italic)
bdf_destroy (df->font_italic);
if (df->font_bold)
bdf_destroy (df->font_bold);
if (df->font_bold_italic)
bdf_destroy (df->font_bold_italic);
hurd_ihash_destroy (&df->charmap);
free (df->charmap_data);
free (df->vga_font);
free (df);
}
/* Determine if CHR is a character that needs to be continuous in the
horizontal direction by repeating the last (eighth) column in
9-pixel-width mode. */
static inline int
is_lgc (wchar_t chr)
{
/* This list must be sorted for bsearch! */
static wchar_t horiz_glyphs[] =
{
UNICODE_BOX_DRAWINGS_LIGHT_HORIZONTAL, /* 0x2500 */
UNICODE_BOX_DRAWINGS_HEAVY_HORIZONTAL, /* 0x2501 */
UNICODE_BOX_DRAWINGS_LIGHT_DOWN_AND_RIGHT, /* 0x250c */
UNICODE_BOX_DRAWINGS_DOWN_LIGHT_AND_RIGHT_HEAVY, /* 0x250d */
UNICODE_BOX_DRAWINGS_DOWN_HEAVY_AND_RIGHT_LIGHT, /* 0x250e */
UNICODE_BOX_DRAWINGS_HEAVY_DOWN_AND_RIGHT, /* 0x250f */
UNICODE_BOX_DRAWINGS_LIGHT_UP_AND_RIGHT, /* 0x2514 */
UNICODE_BOX_DRAWINGS_UP_LIGHT_AND_RIGHT_HEAVY, /* 0x2515 */
UNICODE_BOX_DRAWINGS_UP_HEAVY_AND_RIGHT_LIGHT, /* 0x2516 */
UNICODE_BOX_DRAWINGS_HEAVY_UP_AND_RIGHT, /* 0x2517 */
UNICODE_BOX_DRAWINGS_LIGHT_VERTICAL_AND_RIGHT, /* 0x251c */
UNICODE_BOX_DRAWINGS_VERTICAL_LIGHT_AND_RIGHT_HEAVY, /* 0x251d */
UNICODE_BOX_DRAWINGS_UP_HEAVY_AND_RIGHT_UP_LIGHT, /* 0x251e */
UNICODE_BOX_DRAWINGS_DOWN_HEAVY_AND_RIGHT_UP_LIGHT, /* 0x251f */
UNICODE_BOX_DRAWINGS_VERTICAL_HEAVY_AND_RIGHT_LIGHT, /* 0x2520 */
UNICODE_BOX_DRAWINGS_DOWN_LIGHT_AND_RIGHT_UP_HEAVY, /* 0x2521 */
UNICODE_BOX_DRAWINGS_UP_LIGHT_AND_RIGHT_DOWN_HEAVY, /* 0x2522 */
UNICODE_BOX_DRAWINGS_HEAVY_VERTICAL_AND_RIGHT, /* 0x2523 */
UNICODE_BOX_DRAWINGS_LIGHT_DOWN_AND_HORIZONTAL, /* 0x252c */
UNICODE_BOX_DRAWINGS_LEFT_HEAVY_AND_RIGHT_DOWN_LIGHT, /* 0x252d */
UNICODE_BOX_DRAWINGS_RIGHT_HEAVY_AND_LEFT_DOWN_LIGHT, /* 0x252e */
UNICODE_BOX_DRAWINGS_DOWN_LIGHT_AND_HORIZONTAL_HEAVY, /* 0x252f */
UNICODE_BOX_DRAWINGS_DOWN_HEAVY_AND_HORIZONTAL_LIGHT, /* 0x2530 */
UNICODE_BOX_DRAWINGS_RIGHT_LIGHT_AND_LEFT_DOWN_HEAVY, /* 0x2531 */
UNICODE_BOX_DRAWINGS_LEFT_LIGHT_AND_RIGHT_DOWN_HEAVY, /* 0x2532 */
UNICODE_BOX_DRAWINGS_HEAVY_DOWN_AND_HORIZONTAL, /* 0x2533 */
UNICODE_BOX_DRAWINGS_LIGHT_UP_AND_HORIZONTAL, /* 0x2534 */
UNICODE_BOX_DRAWINGS_LEFT_HEAVY_AND_RIGHT_UP_LIGHT, /* 0x2535 */
UNICODE_BOX_DRAWINGS_RIGHT_HEAVY_AND_LEFT_UP_LIGHT, /* 0x2536 */
UNICODE_BOX_DRAWINGS_UP_LIGHT_AND_HORIZONTAL_HEAVY, /* 0x2537 */
UNICODE_BOX_DRAWINGS_UP_HEAVY_AND_HORIZONTAL_LIGHT, /* 0x2538 */
UNICODE_BOX_DRAWINGS_RIGHT_LIGHT_AND_LEFT_UP_HEAVY, /* 0x2539 */
UNICODE_BOX_DRAWINGS_LEFT_LIGHT_AND_RIGHT_UP_HEAVY, /* 0x253a */
UNICODE_BOX_DRAWINGS_HEAVY_UP_AND_HORIZONTAL, /* 0x253b */
UNICODE_BOX_DRAWINGS_LIGHT_VERTICAL_AND_HORIZONTAL, /* 0x253c */
UNICODE_BOX_DRAWINGS_LEFT_HEAVY_AND_RIGHT_VERTICAL_LIGHT, /* 0x253d */
UNICODE_BOX_DRAWINGS_RIGHT_HEAVY_AND_LEFT_VERTICAL_LIGHT, /* 0x253e */
UNICODE_BOX_DRAWINGS_VERTICAL_LIGHT_AND_HORIZONTAL_HEAVY, /* 0x253f */
UNICODE_BOX_DRAWINGS_UP_HEAVY_AND_DOWN_HORIZONTAL_LIGHT, /* 0x2540 */
UNICODE_BOX_DRAWINGS_DOWN_HEAVY_AND_UP_HORIZONTAL_LIGHT, /* 0x2541 */
UNICODE_BOX_DRAWINGS_VERTICAL_HEAVY_AND_HORIZONTAL_LIGHT, /* 0x2542 */
UNICODE_BOX_DRAWINGS_LEFT_UP_HEAVY_AND_RIGHT_DOWN_LIGHT, /* 0x2543 */
UNICODE_BOX_DRAWINGS_RIGHT_UP_HEAVY_AND_LEFT_DOWN_LIGHT, /* 0x2544 */
UNICODE_BOX_DRAWINGS_LEFT_DOWN_HEAVY_AND_RIGHT_UP_LIGHT, /* 0x2545 */
UNICODE_BOX_DRAWINGS_RIGHT_DOWN_HEAVY_AND_LEFT_UP_LIGHT, /* 0x2546 */
UNICODE_BOX_DRAWINGS_DOWN_LIGHT_AND_UP_HORIZONTAL_HEAVY, /* 0x2547 */
UNICODE_BOX_DRAWINGS_UP_LIGHT_AND_DOWN_HORIZONTAL_HEAVY, /* 0x2548 */
UNICODE_BOX_DRAWINGS_RIGHT_LIGHT_AND_LEFT_VERTICAL_HEAVY, /* 0x2549 */
UNICODE_BOX_DRAWINGS_LEFT_LIGHT_AND_RIGHT_VERTICAL_HEAVY, /* 0x254a */
UNICODE_BOX_DRAWINGS_HEAVY_VERTICAL_AND_HORIZONTAL, /* 0x254b */
UNICODE_BOX_DRAWINGS_DOUBLE_HORIZONTAL, /* 0x2550 */
UNICODE_BOX_DRAWINGS_DOWN_SINGLE_AND_RIGHT_DOUBLE, /* 0x2552 */
UNICODE_BOX_DRAWINGS_DOWN_DOUBLE_AND_RIGHT_SINGLE, /* 0x2553 */
UNICODE_BOX_DRAWINGS_DOUBLE_DOWN_AND_RIGHT, /* 0x2554 */
UNICODE_BOX_DRAWINGS_UP_SINGLE_AND_RIGHT_DOUBLE, /* 0x2558 */
UNICODE_BOX_DRAWINGS_UP_DOUBLE_AND_RIGHT_SINGLE, /* 0x2559 */
UNICODE_BOX_DRAWINGS_DOUBLE_UP_AND_RIGHT, /* 0x255a */
UNICODE_BOX_DRAWINGS_VERTICAL_SINGLE_AND_RIGHT_DOUBLE, /* 0x255e */
UNICODE_BOX_DRAWINGS_VERTICAL_DOUBLE_AND_RIGHT_SINGLE, /* 0x255f */
UNICODE_BOX_DRAWINGS_DOUBLE_VERTICAL_AND_RIGHT, /* 0x2560 */
UNICODE_BOX_DRAWINGS_DOWN_SINGLE_AND_HORIZONTAL_DOUBLE, /* 0x2564 */
UNICODE_BOX_DRAWINGS_DOWN_DOUBLE_AND_HORIZONTAL_SINGLE, /* 0x2565 */
UNICODE_BOX_DRAWINGS_DOUBLE_DOWN_AND_HORIZONTAL, /* 0x2566 */
UNICODE_BOX_DRAWINGS_UP_SINGLE_AND_HORIZONTAL_DOUBLE, /* 0x2567 */
UNICODE_BOX_DRAWINGS_UP_DOUBLE_AND_HORIZONTAL_SINGLE, /* 0x2568 */
UNICODE_BOX_DRAWINGS_DOUBLE_UP_AND_HORIZONTAL, /* 0x2569 */
UNICODE_BOX_DRAWINGS_VERTICAL_SINGLE_AND_HORIZONTAL_DOUBLE, /* 0x256a */
UNICODE_BOX_DRAWINGS_VERTICAL_DOUBLE_AND_HORIZONTAL_SINGLE, /* 0x256b */
UNICODE_BOX_DRAWINGS_DOUBLE_VERTICAL_AND_HORIZONTAL, /* 0x256c */
UNICODE_BOX_DRAWINGS_LIGHT_ARC_DOWN_AND_RIGHT, /* 0x256d */
UNICODE_BOX_DRAWINGS_LIGHT_ARC_UP_AND_RIGHT, /* 0x2570 */
#if 0
/* The diagonal lines don't look much better with or without the
ninth column. */
/* 0x2571 */
UNICODE_BOX_DRAWINGS_LIGHT_DIAGONAL_UPPER_RIGHT_TO_LOWER_LEFT,
/* 0x2572 */
UNICODE_BOX_DRAWINGS_LIGHT_DIAGONAL_UPPER_LEFT_TO_LOWER_RIGHT,
UNICODE_BOX_DRAWINGS_LIGHT_DIAGONAL_CROSS, /* 0x2573 */
#endif
UNICODE_BOX_DRAWINGS_LIGHT_RIGHT, /* 0x2576 */
UNICODE_BOX_DRAWINGS_HEAVY_RIGHT, /* 0x257a */
UNICODE_BOX_DRAWINGS_LIGHT_LEFT_AND_HEAVY_RIGHT, /* 0x257c */
UNICODE_BOX_DRAWINGS_HEAVY_LEFT_AND_LIGHT_RIGHT, /* 0x257e */
UNICODE_UPPER_HALF_BLOCK, /* 0x2580 */
UNICODE_LOWER_ONE_EIGHTH_BLOCK, /* 0x2581 */
UNICODE_LOWER_ONE_QUARTER_BLOCK, /* 0x2582 */
UNICODE_LOWER_THREE_EIGHTHS_BLOCK, /* 0x2583 */
UNICODE_LOWER_HALF_BLOCK, /* 0x2584 */
UNICODE_LOWER_FIVE_EIGHTHS_BLOCK, /* 0x2585 */
UNICODE_LOWER_THREE_QUARTERS_BLOCK, /* 0x2586 */
UNICODE_LOWER_SEVEN_EIGHTHS_BLOCK, /* 0x2587 */
UNICODE_FULL_BLOCK, /* 0x2588 */
UNICODE_RIGHT_HALF_BLOCK, /* 0x2590 */
#if 0
/* The shades don't look much better with or without the ninth
column. */
UNICODE_LIGHT_SHADE, /* 0x2591 */
UNICODE_MEDIUM_SHADE, /* 0x2592 */
UNICODE_DARK_SHADE, /* 0x2593 */
#endif
UNICODE_BLACK_SQUARE, /* 0x25a0 */
UNICODE_UPPER_ONE_EIGHTH_BLOCK, /* 0x2594 */
UNICODE_RIGHT_ONE_EIGHTH_BLOCK, /* 0x2595 */
UNICODE_QUADRANT_LOWER_RIGHT, /* 0x2597 */
UNICODE_QUADRANT_UPPER_LEFT_AND_LOWER_LEFT_AND_LOWER_RIGHT, /* 0x2599 */
UNICODE_QUADRANT_UPPER_LEFT_AND_LOWER_RIGHT, /* 0x259a */
UNICODE_QUADRANT_UPPER_LEFT_AND_UPPER_RIGHT_AND_LOWER_LEFT, /* 0x259b */
UNICODE_QUADRANT_UPPER_LEFT_AND_UPPER_RIGHT_AND_LOWER_RIGHT, /* 0x259c */
UNICODE_QUADRANT_UPPER_RIGHT, /* 0x259d */
UNICODE_QUADRANT_UPPER_RIGHT_AND_LOWER_LEFT, /* 0x259e */
UNICODE_QUADRANT_UPPER_RIGHT_AND_LOWER_LEFT_AND_LOWER_RIGHT, /* 0x259f */
};
int cmp_wchar (const void *a, const void *b)
{
const wchar_t *wa = (const wchar_t *) a;
const wchar_t *wb = (const wchar_t *) b;
return (*wa > *wb) - (*wa < *wb);
}
#if QUAERENDO_INVENIETIS
/* XXX The (maximum) size is hard coded. */
if (chr >= GNU_HEAD_BEGIN && chr <= GNU_HEAD_BEGIN + 50)
return 1;
#endif
return bsearch (&chr, horiz_glyphs,
sizeof (horiz_glyphs) / sizeof (horiz_glyphs[0]),
sizeof (horiz_glyphs[0]), cmp_wchar) ? 1 : 0;
}
/* Try to look up glyph CHR in font FONT of dynafont DF with attribute
ATTR. This is a helper function for dynafont_lookup. Returns 1 on
success, 0 otherwise. */
static int
dynafont_lookup_internal (dynafont_t df, bdf_font_t font,
wchar_t wide_chr, wchar_t attr, int *rpos)
{
/* When hashing the character, we mix in the font attribute. */
struct mapped_character *chr = hurd_ihash_find (&df->charmap,
(int) (wide_chr | attr));
int lgc;
struct bdf_glyph *glyph;
int pos;
int found = 0;
lgc = df->use_lgc ? is_lgc (wide_chr) : 0;
if (chr)
{
if (!chr->refs++)
{
if (lgc)
df->vga_font_free_indices_lgc--;
else
df->vga_font_free_indices--;
}
/* Return the index of CHR. */
*rpos = chr - df->charmap_data;
return 1;
}
/* The character is not currently mapped. Look for an empty slot
and add it. */
if ((lgc && !df->vga_font_free_indices_lgc)
|| (!lgc && !df->vga_font_free_indices))
return 0;
glyph = bdf_find_glyph (font, (int) (wide_chr & ~CONS_WCHAR_CONTINUED), 0);
if (!glyph)
glyph = bdf_find_glyph (font, -1, (int) (wide_chr & ~CONS_WCHAR_CONTINUED));
if (!glyph)
return 0;
if (lgc)
{
int start_pos = df->vga_font_last_free_index_lgc + 1;
if ((start_pos % VGA_FONT_SIZE)
== VGA_FONT_LGC_BEGIN + VGA_FONT_LGC_COUNT)
{
start_pos += VGA_FONT_SIZE - VGA_FONT_LGC_COUNT;
start_pos %= df->size;
}
pos = start_pos;
do
{
if (df->charmap_data[pos].refs == 0)
{
found = 1;
break;
}
pos++;
if ((pos % VGA_FONT_SIZE) == VGA_FONT_LGC_BEGIN + VGA_FONT_LGC_COUNT)
{
pos += VGA_FONT_SIZE - VGA_FONT_LGC_COUNT;
pos %= df->size;
}
}
while (pos != start_pos);
assert (found);
df->vga_font_free_indices_lgc--;
df->vga_font_last_free_index_lgc = pos;
}
else
{
int start_pos = (df->vga_font_last_free_index + 1) % df->size;
if (df->use_lgc && (start_pos % VGA_FONT_SIZE) == VGA_FONT_LGC_BEGIN)
start_pos += VGA_FONT_LGC_COUNT;
pos = start_pos;
do
{
if (df->charmap_data[pos].refs == 0)
{
found = 1;
break;
}
pos = (pos + 1) % df->size;
if (df->use_lgc && (pos % VGA_FONT_SIZE) == VGA_FONT_LGC_BEGIN)
pos += VGA_FONT_LGC_COUNT;
}
while (pos != start_pos);
assert (found);
df->vga_font_free_indices--;
df->vga_font_last_free_index = pos;
}
/* Ok, we found a new entry, use it. */
chr = &df->charmap_data[pos];
chr->refs = 1;
chr->character = (wide_chr | attr);
/* Copy the glyph bitmap, taking into account double-width characters. */
{
int height = (glyph->bbox.height > 32) ? 32 : glyph->bbox.height;
int bwidth = (glyph->bbox.width + 7) / 8;
int ofs = (bwidth >= 2) && (wide_chr & CONS_WCHAR_CONTINUED);
for (int i = 0; i < height; i++)
df->vga_font[pos][i] = glyph->bitmap[i * bwidth + ofs];
if (height < 32)
memset (&df->vga_font[pos][height], 0, 32 - height);
}
if (active_dynafont == df)
vga_write_font_buffer (0, pos, df->vga_font[pos],
VGA_FONT_HEIGHT);
/* Update the hash table. */
if (chr->locp)
hurd_ihash_locp_remove (&df->charmap, chr->locp);
hurd_ihash_add (&df->charmap, (int) (wide_chr | attr), chr);
*rpos = pos;
return 1;
}
/* Look up the vga font index for an UCS-4 character. If not already
mapped, try to find space for a new entry and add the mapping.
Acquires an additional reference to the character. Might return
the glyph for the unrepresentable character if the glyph is ot
available for this character or no free slot is available right
now. In the former case, some information gets lost (to do
otherwise, one would have to either assign one of the scarce font
indices to each undisplayable character value on screen, or to
store the whole scrollback buffer as wide chars as well to recover
the lost info from that copy of the original text. */
int
dynafont_lookup (dynafont_t df, conchar_t *conchr)
{
wchar_t attr = (conchr->attr.italic ? WCHAR_ITALIC : 0)
| (conchr->attr.bold ? WCHAR_BOLD : 0);
int found = 0;
int pos = FONT_INDEX_UNKNOWN;
if (attr == (WCHAR_BOLD | WCHAR_ITALIC) && df->font_bold_italic)
found = dynafont_lookup_internal (df, df->font_bold_italic,
conchr->chr, WCHAR_BOLD | WCHAR_ITALIC,
&pos);
/* This order will prefer bold over italic if both are requested but
are not available at the same time. The other order is just as
good. XXX. */
if (!found && (attr & WCHAR_BOLD) && df->font_bold)
found = dynafont_lookup_internal (df, df->font_bold,
conchr->chr, WCHAR_BOLD, &pos);
if (!found && (attr & WCHAR_ITALIC) && df->font_italic)
found = dynafont_lookup_internal (df, df->font_italic,
conchr->chr, WCHAR_ITALIC, &pos);
if (!found)
found = dynafont_lookup_internal (df, df->font, conchr->chr, 0, &pos);
if (!found)
{
df->charmap_data[FONT_INDEX_UNKNOWN].refs++;
pos = FONT_INDEX_UNKNOWN;
}
return pos;
}
/* Release a reference to the glyph VGA_FONT_INDEX in dynafont DF. */
void
dynafont_release (dynafont_t df, int vga_font_index)
{
if (! --df->charmap_data[vga_font_index].refs)
{
if (df->use_lgc
&& is_lgc (df->charmap_data[vga_font_index].character & WCHAR_MASK))
df->vga_font_free_indices_lgc++;
else
df->vga_font_free_indices++;
}
}
/* Set the cursor to normal if STANDOUT is zero, or to a block cursor
otherwise. */
void
dynafont_set_cursor (dynafont_t df, int standout)
{
int height = (df->font->bbox.height > 32) ? 32 : df->font->bbox.height;
df->cursor_standout = standout;
if (df == active_dynafont)
{
if (standout)
vga_set_cursor_size (1, -1);
else
vga_set_cursor_size ((height >= 2) ? height - 2 : 0, -1);
}
}
/* Load the VGA font to the card and make it active. */
void
dynafont_activate (dynafont_t df)
{
int height = (df->font->bbox.height > 32) ? 32 : df->font->bbox.height;
vga_write_font_buffer (0, 0, (char *) df->vga_font,
df->size * VGA_FONT_HEIGHT);
vga_select_font_buffer (0, (df->size == 512) ? 1 : 0);
/* XXX Changing the font height below 13 or above 16 will cause
display problems for the user if we don't also program the video
mode timings. The standard font height for 80x25 is 16. */
vga_set_font_height (height);
vga_set_font_width (df->font->bbox.width % 8 ? 9 : 8);
active_dynafont = df;
dynafont_set_cursor (df, df->cursor_standout);
}
#if 0
/* XXX This code is deactivated because it needs to be changed to
allow the italic and bold code, too. */
/* Change the font used by dynafont DF to FONT. This transformation
is initially loss-less, if the new font can't display some
characters on the screen, you can always go back to a font that
does and get the glyphs for those characters back. (However, the
comments in dynafont_lookup hold for glyphs looked up after the font
change.) */
void
dynafont_change_font (dynafont_t df, bdf_font_t font)
{
int i;
df->font = font;
for (i = 0; i < df->size; i++)
{
/* If we don't derive the unknown or space glyph from the font,
we don't update it. */
#ifndef ENCODING_UNKNOWN
if (i == FONT_INDEX_UNKNOWN)
continue;
#endif
if (! df->charmap_data[i].refs)
{
/* The glyph is not used. If it is mapped, we need to
remove the mapping to invalidate the glyph. */
if (df->charmap_data[i].locp)
{
hurd_ihash_locp_remove (&df->charmap, df->charmap_data[i].locp);
df->charmap_data[i].locp = NULL;
}
}
else
{
/* The glyph is mapped and in use. We will not destroy the
mapping, but just override the glyph in the VGA font.
This way the user can recover from loading a bad font by
going back to a better one. */
struct bdf_glyph *glyph;
glyph = bdf_find_glyph (df->font,
(int) df->charmap_data[i].character, 0);
if (!glyph)
glyph = bdf_find_glyph (df->font, -1,
(int) df->charmap_data[i].character);
if (!glyph)
{
#ifdef ENCODING_UNKNOWN
/* The new font doesn't have a representation for the
unknown glyph at the desired place, so keep the old
one. XXX Should load the built-in one here. */
if (i == FONT_INDEX_UNKNOWN)
continue;
#endif
memcpy (df->vga_font[i], df->vga_font[FONT_INDEX_UNKNOWN], 32);
}
else
{
/* XXX Take font size and glyph size into account. */
for (int j = 0; j < ((glyph->bbox.height > 32)
? 32 : glyph->bbox.height); j++)
df->vga_font[i][j]
= glyph->bitmap[j * ((glyph->bbox.width + 7) / 8)];
if (glyph->bbox.height < 32)
memset (((char *) df->vga_font[i]) + glyph->bbox.height,
0, 32 - glyph->bbox.height);
}
}
}
if (active_dynafont == df)
/* Refresh the card info. */
dynafont_activate (df);
}
#endif
|