forked from iPodLinux/hotdog
-
Notifications
You must be signed in to change notification settings - Fork 0
/
hotdog_font.c
1279 lines (1104 loc) · 34.7 KB
/
hotdog_font.c
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
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <netinet/in.h>
#include "hotdog.h"
#define HDF_MAGIC 0x676f6448
/************ Drawing and objecting ****************/
static void _do_draw_char8 (hd_surface srf, hd_font *font, int x, int y, uint32 color, uint16 ch, int cblend)
{
uint8 *pixels = (uint8 *)font->pixels + font->offset[ch];
int width = font->width[ch];
int sx = x, ex = x + width, ey = y + font->h;
while (y < ey) {
uint32 pix;
x = sx;
while (x < ex) {
pix = HD_MASKPIX (color, *pixels++);
HD_SRF_BLENDPIX (srf, x, y, pix);
x++;
}
if (font->bitstype == HD_FONT_CLUMPED)
pixels += font->pitch - (width & (font->pitch - 1));
else
pixels += font->pitch - width;
y++;
}
}
static void _do_draw_char8_fast (hd_surface srf, hd_font *font, int x, int y, uint32 color, uint16 ch, int cblend)
{
uint8 *pixels = (uint8 *)font->pixels + font->offset[ch];
uint32 *dest = HD_SRF_PIXPTR (srf, x, y);
uint32 pix;
int width = font->width[ch];
int sx = x, ex = x + width, ey = y + font->h;
color = ~color;
while (y < ey) {
x = sx;
while (x < ex) {
pix = *pixels++;
pix |= (pix << 8);
pix |= (pix << 16);
*dest++ = pix ^ color;
x++;
}
if (font->bitstype == HD_FONT_CLUMPED)
pixels += font->pitch - (width & (font->pitch - 1));
else
pixels += font->pitch - width;
dest += HD_SRF_WIDTH (srf) - width;
y++;
}
}
static void _do_draw_char32 (hd_surface srf, hd_font *font, int x, int y, uint32 color, uint16 ch, int cblend)
{
uint32 *pixels = (uint32 *)font->pixels + font->offset[ch];
int width = font->width[ch];
int sx = x, ex = x + width, ey = y + font->h;
while (y < ey) {
x = sx;
while (x < ex) {
HD_SRF_BLENDPIX (srf, x, y, *pixels++);
x++;
}
if (font->bitstype == HD_FONT_PITCHED)
pixels += font->pitch - width;
y++;
}
}
static void _do_draw_char32_fast (hd_surface srf, hd_font *font, int x, int y, uint32 color, uint16 ch, int cblend)
{
uint32 *pixels = (uint32 *)font->pixels + font->offset[ch];
uint32 *dest = HD_SRF_PIXPTR (srf, x, y);
int width = font->width[ch];
int ey = y + font->h;
while (y < ey) {
memcpy (dest, pixels, 4*width);
if (font->bitstype == HD_FONT_CLUMPED)
pixels += width;
else
pixels += (font->pitch >> 2);
dest += HD_SRF_WIDTH (srf);
y++;
}
}
static void _do_draw_char1 (hd_surface srf, hd_font *font, int x, int y, uint32 color, uint16 ch, int cblend)
{
uint8 *pixels = (uint8 *)font->pixels + font->offset[ch];
int ofs = 0;
int width = font->width[ch];
int sx = x, ex = x + width, ey = y + font->h;
while (y < ey) {
int byte = 0;
x = sx;
ofs = 0;
// Read this row.
while (x < ex) {
if (!(ofs & 7)) byte = *pixels++;
if (byte & 0x80) {
if (cblend)
HD_SRF_BLENDPIX (srf, x, y, color);
else
HD_SRF_SETPIX (srf, x, y, color);
}
byte <<= 1;
ofs++;
x++;
}
ofs = (ofs + 7) >> 3; // ofs = number of bytes consumed
if (font->bitstype == HD_FONT_CLUMPED) {
// Align to multiple of pitch.
while (ofs & (font->pitch - 1)) {
ofs++;
pixels++;
}
} else {
// Advance to next row.
pixels += font->pitch - ofs;
}
y++;
}
}
typedef void draw_func (hd_surface srf, hd_font *font, int x, int y, uint32 color, uint16 ch, int blend_all);
static inline draw_func *_do_pick_draw_func (int bpp, int blend_parts)
{
switch (bpp + !blend_parts) {
case 1:
case 2:
return _do_draw_char1;
case 8:
return _do_draw_char8;
case 9:
return _do_draw_char8_fast;
case 32:
return _do_draw_char32;
case 33:
return _do_draw_char32_fast;
default:
fprintf (stderr, "Invalid bpp in font!\n");
abort();
}
return 0;
}
static void _do_draw_lat8 (hd_surface srf, hd_font *font, int x, int y, uint32 color, const char *str,
int blend_all, int blend_parts)
{
int cx = x, cy = y;
const char *p = str;
draw_func *func = _do_pick_draw_func (font->bpp, blend_parts);
while (*p) {
if (*p == '\n') {
cx = x;
cy += font->h + 1;
}
else if (*p == ' ') {
int ch = 0x20 - font->firstchar;
cx += font->width[ch < 0 ? 0 : ch];
}
else if (*p > font->firstchar && *p < font->firstchar + font->nchars) {
(*func)(srf, font, cx, cy, color, *p - font->firstchar, blend_all);
cx += font->width[*p - font->firstchar];
}
p++;
}
}
static void _do_draw_uc16 (hd_surface srf, hd_font *font, int x, int y, uint32 color, const uint16 *str,
int blend_all, int blend_parts)
{
int cx = x, cy = y;
const uint16 *p = str;
draw_func *func = _do_pick_draw_func (font->bpp, blend_parts);
while (*p) {
if (*p == '\n') {
cx = x;
cy += font->h + 1;
}
else if (*p > font->firstchar && *p < font->firstchar + font->nchars) {
(*func)(srf, font, cx, cy, color, *p - font->firstchar, blend_all);
cx += font->width[*p - font->firstchar];
}
p++;
}
}
void HD_Font_DrawLatin1 (hd_surface srf, hd_font *font, int x, int y, uint32 color, const char *str)
{
_do_draw_lat8 (srf, font, x, y, color, str, (color & 0xff000000) != 0xff000000, 1);
}
void HD_Font_DrawFastLatin1 (hd_surface srf, hd_font *font, int x, int y, uint32 color, const char *str)
{
int luminance;
luminance = (((color & 0x00FF0000) >> (16 + 2)) +
((color & 0x0000FF00) >> ( 8 + 1)) +
((color & 0x0000FF00) >> ( 8 + 3)) +
((color & 0x000000FF) >> ( 0 + 3)));
_do_draw_lat8 (srf, font, x, y, (font->bpp == 1)? color : (luminance > 128)? 0xffffffff : 0, str, 0, 0);
}
void HD_Font_DrawUnicode (hd_surface srf, hd_font *font, int x, int y, uint32 color, const uint16 *str)
{
_do_draw_uc16 (srf, font, x, y, color, str, (color & 0xff000000) != 0xff000000, 1);
}
void HD_Font_DrawFastUnicode (hd_surface srf, hd_font *font, int x, int y, uint32 color, const uint16 *str)
{
int luminance;
luminance = (((color & 0x00FF0000) >> (16 + 2)) +
((color & 0x0000FF00) >> ( 8 + 1)) +
((color & 0x0000FF00) >> ( 8 + 3)) +
((color & 0x000000FF) >> ( 0 + 3)));
_do_draw_uc16 (srf, font, x, y, (font->bpp == 1)? color : (luminance > 128)? 0xffffffff : 0, str, 0, 0);
}
static int IsASCII (const char *str)
{
const char *p = str;
while (*p) {
if (*p & 0x80) return 0;
p++;
}
return 1;
}
static unsigned int ConvertUTF8 (const unsigned char *src, unsigned short *dst)
{
const unsigned char *sp = src;
unsigned short *dp = dst;
int len = 0;
while (*sp) {
*dp = 0;
if (*sp < 0x80) *dp = *sp++;
else if (*sp >= 0xC0 && *sp < 0xE0) {
*dp |= (*sp++ - 0xC0) << 6; if (!*sp) goto err;
*dp |= (*sp++ - 0x80);
}
else if (*sp >= 0xE0 && *sp < 0xF0) {
*dp |= (*sp++ - 0xE0) << 12; if (!*sp) goto err;
*dp |= (*sp++ - 0x80) << 6; if (!*sp) goto err;
*dp |= (*sp++ - 0x80);
}
else if (*sp >= 0xF0 && *sp < 0xF8) {
*dp |= (*sp++ - 0xF0) << 18; if (!*sp) goto err;
*dp |= (*sp++ - 0x80) << 12; if (!*sp) goto err;
*dp |= (*sp++ - 0x80) << 6; if (!*sp) goto err;
*dp |= (*sp++ - 0x80);
}
else if (*sp >= 0xF8 && *sp < 0xFC) {
*dp |= (*sp++ - 0xF8) << 24; if (!*sp) goto err;
*dp |= (*sp++ - 0x80) << 18; if (!*sp) goto err;
*dp |= (*sp++ - 0x80) << 12; if (!*sp) goto err;
*dp |= (*sp++ - 0x80) << 6; if (!*sp) goto err;
*dp |= (*sp++ - 0x80);
}
else if (*sp >= 0xFC && *sp < 0xFE) {
*dp |= (*sp++ - 0xF8) << 30; if (!*sp) goto err;
*dp |= (*sp++ - 0x80) << 24; if (!*sp) goto err;
*dp |= (*sp++ - 0x80) << 18; if (!*sp) goto err;
*dp |= (*sp++ - 0x80) << 12; if (!*sp) goto err;
*dp |= (*sp++ - 0x80) << 6; if (!*sp) goto err;
*dp |= (*sp++ - 0x80);
}
else goto err;
dp++;
len++;
continue;
err:
*dp++ = '?';
sp++;
len++;
}
*dp = 0;
return len;
}
void HD_Font_Draw (hd_surface srf, hd_font *font, int x, int y, uint32 color, const char *str)
{
if (IsASCII (str))
HD_Font_DrawLatin1 (srf, font, x, y, color, str);
else {
unsigned short *buf = xmalloc (strlen (str) * 2 + 2);
unsigned int len = ConvertUTF8 ((const unsigned char *)str, buf);
buf[len] = 0;
HD_Font_DrawUnicode (srf, font, x, y, color, buf);
free (buf);
}
}
void HD_Font_DrawFast (hd_surface srf, hd_font *font, int x, int y, uint32 color, const char *str)
{
if (IsASCII (str))
HD_Font_DrawFastLatin1 (srf, font, x, y, color, str);
else {
unsigned short *buf = xmalloc (strlen (str) * 2 + 2);
unsigned int len = ConvertUTF8 ((const unsigned char *)str, buf);
buf[len] = 0;
HD_Font_DrawFastUnicode (srf, font, x, y, color, buf);
free (buf);
}
}
int HD_Font_TextWidthLatin1 (hd_font *font, const char *str)
{
const char *p = str;
int ret = 0;
if (!font || !str || !font->width) return -1;
while (*p) {
if (*p - font->firstchar <= font->nchars)
ret += font->width[*p - font->firstchar];
p++;
}
return ret;
}
int HD_Font_TextWidthUnicode (hd_font *font, const uint16 *str)
{
const uint16 *p = str;
int ret = 0;
if (!font || !str || !font->width) return -1;
while (*p) {
if (*p - font->firstchar <= font->nchars)
ret += font->width[*p - font->firstchar];
p++;
}
return ret;
}
int HD_Font_TextWidth (hd_font *font, const char *str)
{
if (IsASCII (str))
return HD_Font_TextWidthLatin1 (font, str);
else {
unsigned short *buf = xmalloc (strlen (str) * 2 + 2);
unsigned int len = ConvertUTF8 ((const unsigned char *)str, buf);
buf[len] = 0;
int ret = HD_Font_TextWidthUnicode (font, buf);
free (buf);
return ret;
}
}
hd_object *HD_Font_MakeObject (hd_font *font, uint32 col, const char *str)
{
hd_object *ret = HD_Canvas_Create (HD_Font_TextWidth (font, str), font->h);
if (!ret) return 0;
HD_Font_Draw (ret->canvas, font, 0, 0, col, str);
return ret;
}
/********************* Freeing *********************/
void HD_Font_Free (hd_font *font)
{
if (font->offset) free (font->offset);
if (font->width) free (font->width);
if (font->pixels) free (font->pixels);
free (font);
}
/*********************** HDF ***********************/
/* The HDF header. All fields are stored big-endian. */
typedef struct HDF_header
{
uint32 magic; /* 'Hdog' = 0x676f6448 */
uint16 nchars; /* number of characters in the font */
uint16 firstchar; /* first character */
uint8 bpp; /* bits per pixel: 1, 8, or 32 */
uint8 bitstype; /* HD_FONT_PITCHED or HD_FONT_CLUMPED */
uint16 height; /* height of the font, height of the data surface */
uint32 pitch; /* width in bytes of a scanline in the data surface, for PITCHED fonts.
Has a different meaning for CLUMPED fonts; see hotdog.h. */
uint32 nbytes; /* Number of bytes of character data to read */
/* 32-bit AARRGGBB bytes are premultiplied! */
} __attribute__ ((packed)) HDF_header;
/* Following the header are <nchars> 32-bit BE values indicating the offset
* in pixels into the data surface.
* (The first one is char <firstchar>, second is char <firstchar>+1, etc.)
*
* Following that are <nchars> bytes indicating the *width* of
* each character, indexed in the same way.
*
* Following that is the data surface.
*/
/* 1-bpp fonts look like
*
* MSb, byte 0 LSb MSb, byte 1 LSb
* | | | |
* v v v v
* 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ...
*
* That is, the bits are arranged in bytes, MSb first. The numbers
* indicate bit positions (0=first bit, 1=second, ...).
*/
/* 32-bit fonts are stored in AA RR GG BB byte order (ARGB big-endian),
* and cannot be colored differently from their color in the file.
* The ARGB bytes are premultiplied.
*/
hd_font *HD_Font_LoadHDF (const char *filename)
{
int i;
FILE *fp = fopen (filename, "rb");
if (!fp) return 0;
HDF_header hdr;
fread (&hdr, 20, 1, fp);
hdr.magic = ntohl (hdr.magic);
hdr.nchars = ntohs (hdr.nchars);
hdr.firstchar = ntohs (hdr.firstchar);
hdr.height = ntohs (hdr.height);
hdr.pitch = ntohl (hdr.pitch);
hdr.nbytes = ntohl (hdr.nbytes);
if (hdr.magic != HDF_MAGIC || (hdr.bpp != 1 && hdr.bpp != 8 && hdr.bpp == 32)) {
fclose (fp);
return 0;
}
hd_font *font = xmalloc (sizeof(hd_font));
font->bitstype = hdr.bitstype;
font->pitch = hdr.pitch;
font->h = hdr.height;
font->bpp = hdr.bpp;
font->firstchar = hdr.firstchar;
font->nchars = hdr.nchars;
font->defaultchar = 0;
font->pixbytes = hdr.nbytes;
font->offset = xmalloc (4 * font->nchars);
font->width = xmalloc (font->nchars);
font->pixels = xmalloc (font->pixbytes);
if (!font->offset || !font->width || !font->pixels) {
if (font->offset) free (font->offset);
if (font->width) free (font->width);
if (font->pixels) free (font->pixels);
free (font);
return 0;
}
fread (font->offset, 4, font->nchars, fp);
for (i = 0; i < font->nchars; i++)
font->offset[i] = ntohl (font->offset[i]);
fread (font->width, 1, font->nchars, fp);
fread (font->pixels, font->pixbytes, 1, fp);
if (font->bpp == 32) {
uint32 *pp;
for (pp = font->pixels; pp < (uint32 *)((char *)font->pixels + font->pixbytes); pp++)
*pp = ntohl (*pp);
}
return font;
}
int HD_Font_SaveHDF (hd_font *font, const char *filename)
{
int i;
FILE *fp = fopen (filename, "wb");
if (!fp) return -1;
HDF_header hdr;
hdr.magic = htonl (HDF_MAGIC);
hdr.nchars = htons (font->nchars);
hdr.firstchar = htons (font->firstchar);
hdr.bpp = font->bpp;
hdr.bitstype = font->bitstype;
hdr.height = htons (font->h);
hdr.pitch = htonl (font->pitch);
hdr.nbytes = htonl (font->pixbytes);
fwrite (&hdr, 16, 1, fp);
for (i = 0; i < font->nchars; i++)
font->offset[i] = htonl (font->offset[i]);
fwrite (font->offset, 4, font->nchars, fp);
for (i = 0; i < font->nchars; i++)
font->offset[i] = ntohl (font->offset[i]);
fwrite (font->width, 1, font->nchars, fp);
if (font->bpp == 32) {
uint32 *pp;
for (pp = font->pixels; pp < (uint32 *)((char *)font->pixels + font->pixbytes); pp++)
*pp = htonl (*pp);
}
fwrite (font->pixels, font->pixbytes, 1, fp);
if (font->bpp == 32) {
uint32 *pp;
for (pp = font->pixels; pp < (uint32 *)((char *)font->pixels + font->pixbytes); pp++)
*pp = ntohl (*pp);
}
fclose (fp);
return 0;
}
/*********************** FNT ***********************/
/** Most of this code is taken from Microwindows. **/
/* Utility functions for LoadFNT and LoadPCF - read little-endian datums. */
static int read16 (FILE *fp, uint16 *sp)
{
int c;
uint16 s = 0;
if ((c = getc (fp)) == EOF) return 0;
s |= (c & 0xff);
if ((c = getc (fp)) == EOF) return 0;
s |= (c & 0xff) << 8;
*sp = s;
return 1;
}
static int read32 (FILE *fp, uint32 *lp)
{
int c;
uint32 l = 0;
if ((c = getc (fp)) == EOF) return 0;
l |= (c & 0xff);
if ((c = getc (fp)) == EOF) return 0;
l |= (c & 0xff) << 8;
if ((c = getc (fp)) == EOF) return 0;
l |= (c & 0xff) << 16;
if ((c = getc (fp)) == EOF) return 0;
l |= (c & 0xff) << 24;
*lp = l;
return 1;
}
static int readstr (FILE *fp, char *buf, int count)
{
return fread (buf, 1, count, fp);
}
hd_font *HD_Font_LoadFNT (const char *filename)
{
FILE *fp = fopen (filename, "rb");
if (!fp) return 0;
uint16 maxwidth, height, ascent, pad;
uint32 firstchar, defaultchar, nchars;
uint32 nbits, noffset, nwidth, i;
char version[5];
memset (version, 0, 5);
if (readstr (fp, version, 4) != 4)
goto errout;
if (strcmp (version, "RB11") != 0)
goto errout;
fseek (fp, 0x140, SEEK_CUR); // skip name and copyright
if (!read16 (fp, &maxwidth)) goto errout;
if (!read16 (fp, &height)) goto errout;
if (!read16 (fp, &ascent)) goto errout;
if (!read16 (fp, &pad)) goto errout;
if (!read32 (fp, &firstchar)) goto errout;
if (!read32 (fp, &defaultchar)) goto errout;
if (!read32 (fp, &nchars)) goto errout;
if (!read32 (fp, &nbits)) goto errout; // nbits = number of *words* of bmap data
if (!read32 (fp, &noffset)) goto errout;
if (!read32 (fp, &nwidth)) goto errout;
hd_font *font = xmalloc (sizeof(hd_font));
font->bitstype = HD_FONT_CLUMPED;
font->pitch = 2;
font->h = height;
font->bpp = 1;
font->firstchar = firstchar;
font->nchars = nchars;
font->defaultchar = defaultchar;
font->pixels = xmalloc (font->pixbytes = 2 * nbits);
font->offset = xmalloc (4 * nchars);
font->width = xmalloc (nchars);
if (!font->pixels || !font->offset || !font->width) {
goto errfree;
}
if (nbits & 1) nbits++;
fread (font->pixels, 2, nbits, fp);
uint8 *pix = font->pixels;
for (i = 0; i < nbits; i++) {
uint8 tmp;
tmp = pix[2*i+1];
pix[2*i+1] = pix[2*i];
pix[2*i] = tmp;
}
if (!noffset) goto errfree;
if (noffset > nchars) noffset = nchars;
for (i = 0; i < noffset; i++) {
if (!read32 (fp, font->offset + i))
goto errfree;
font->offset[i] *= 2;
}
if (noffset < nchars) printf ("warning: too few offset data\n");
if (nwidth) {
if (nwidth > nchars) nwidth = nchars;
fread (font->width, 1, nwidth, fp);
if (nwidth < nchars) memset (font->width + nwidth, maxwidth, nchars - nwidth);
} else {
memset (font->width, maxwidth, nchars);
}
fclose (fp);
return font;
errfree:
if (font->offset) free (font->offset);
if (font->width) free (font->width);
if (font->pixels) free (font->pixels);
free (font);
errout:
fclose (fp);
return 0;
}
/*********************** PCF ***********************/
/** Most of this code is taken from Microwindows. **/
/* These are maintained statically for ease FIXME*/
static struct toc_entry *toc;
static uint32 toc_size;
/* Various definitions from the Free86 PCF code */
#define PCF_FILE_VERSION (('p'<<24)|('c'<<16)|('f'<<8)|1)
#define PCF_PROPERTIES (1 << 0)
#define PCF_ACCELERATORS (1 << 1)
#define PCF_METRICS (1 << 2)
#define PCF_BITMAPS (1 << 3)
#define PCF_INK_METRICS (1 << 4)
#define PCF_BDF_ENCODINGS (1 << 5)
#define PCF_SWIDTHS (1 << 6)
#define PCF_GLYPH_NAMES (1 << 7)
#define PCF_BDF_ACCELERATORS (1 << 8)
#define PCF_FORMAT_MASK 0xFFFFFF00
#define PCF_DEFAULT_FORMAT 0x00000000
#define PCF_GLYPH_PAD_MASK (3<<0)
#define PCF_BYTE_MASK (1<<2)
#define PCF_BIT_MASK (1<<3)
#define PCF_SCAN_UNIT_MASK (3<<4)
#define GLYPHPADOPTIONS 4
#define PCF_LSB_FIRST 0
#define PCF_MSB_FIRST 1
#ifndef _BIG_ENDIAN
/* little endian - no action required */
# define wswap(x) (x)
# define dwswap(x) (x)
#else
/** Convert little-endian 16-bit number to the host CPU format. */
# define wswap(x) ((((x) << 8) & 0xff00) | (((x) >> 8) & 0x00ff))
/** Convert little-endian 32-bit number to the host CPU format. */
# define dwswap(x) ((((x) << 24) & 0xff000000L) | \
(((x) << 8) & 0x00ff0000L) | \
(((x) >> 8) & 0x0000ff00L) | \
(((x) >> 24) & 0x000000ffL) )
#endif
/* A few structures that define the various fields within the file */
struct toc_entry {
int type;
int format;
int size;
int offset;
};
struct prop_entry {
unsigned int name;
unsigned char is_string;
unsigned int value;
};
struct string_table {
unsigned char *name;
unsigned char *value;
};
struct metric_entry {
short leftBearing;
short rightBearing;
short width;
short ascent;
short descent;
short attributes;
};
struct encoding_entry {
uint16 min_byte2; /* min_char or min_byte2 */
uint16 max_byte2; /* max_char or max_byte2 */
uint16 min_byte1; /* min_byte1 (hi order) */
uint16 max_byte1; /* max_byte1 (hi order) */
uint16 defaultchar;
uint32 count; /* count of map entries */
uint16 *map; /* font index -> glyph index */
};
/* This is used to quickly reverse the bits in a field */
static unsigned char _reverse_byte[0x100] = {
0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff
};
/*
* Invert bit order within each BYTE of an array.
*/
static void
bit_order_invert(unsigned char *buf, int nbytes)
{
for (; --nbytes >= 0; buf++)
*buf = _reverse_byte[*buf];
}
/*
* Invert byte order within each 16-bits of an array.
*/
static void
two_byte_swap(unsigned char *buf, int nbytes)
{
unsigned char c;
for (; nbytes > 0; nbytes -= 2, buf += 2) {
c = buf[0];
buf[0] = buf[1];
buf[1] = c;
}
}
#define FILEP FILE*
#define FREAD(a,b,c) fread(b,1,c,a)
/* read an 8 bit byte*/
static uint16
readINT8(FILEP file)
{
unsigned char b;
FREAD(file, &b, sizeof(b));
return b;
}
/* read a 16-bit integer LSB16 format*/
static uint16
readLSB16(FILEP file)
{
uint16 s;
FREAD(file, &s, sizeof(s));
return wswap(s);
}
/* read a 32-bit integer LSB32 format*/
static uint32
readLSB32(FILEP file)
{
uint32 n;
FREAD(file, &n, sizeof(n));
return dwswap(n);
}
/* Get the offset of the given field */
static int
pcf_get_offset(int item)
{
uint32 i;
for (i = 0; i < toc_size; i++)
if (item == toc[i].type)
return toc[i].offset;
return -1;
}
/* Read the actual bitmaps into memory */
static int
pcf_readbitmaps(FILE *file, unsigned char **bits, int *bits_size,
uint32 **offsets)
{
long offset;
uint32 format;
uint32 num_glyphs;
uint32 pad;
unsigned int i;
int endian;
uint32 *o;
unsigned char *b;
uint32 bmsize[GLYPHPADOPTIONS];
if ((offset = pcf_get_offset(PCF_BITMAPS)) == -1)
return -1;
fseek (file, offset, SEEK_SET);
format = readLSB32(file);
endian = (format & PCF_BIT_MASK)? PCF_LSB_FIRST: PCF_MSB_FIRST;
num_glyphs = readLSB32(file);
o = *offsets = (uint32 *)xmalloc(num_glyphs * sizeof(uint32));
for (i=0; i < num_glyphs; ++i)
o[i] = readLSB32(file);
for (i=0; i < GLYPHPADOPTIONS; ++i)
bmsize[i] = readLSB32(file);
pad = format & PCF_GLYPH_PAD_MASK;
*bits_size = bmsize[pad]? bmsize[pad] : 1;
/* alloc and read bitmap data*/
b = *bits = (unsigned char *) xmalloc(*bits_size);
FREAD(file, b, *bits_size);
/* convert bitmaps*/
bit_order_invert(b, *bits_size);
#ifdef _BIG_ENDIAN
if (endian == PCF_LSB_FIRST)
two_byte_swap(b, *bits_size);
#else
if (endian == PCF_MSB_FIRST)
two_byte_swap(b, *bits_size);
#endif
return num_glyphs;
}
/* read character metric data*/
static int
pcf_readmetrics(FILE * file, struct metric_entry **metrics)
{
long i, size, offset;
uint32 format;
struct metric_entry *m;
if ((offset = pcf_get_offset(PCF_METRICS)) == -1)
return -1;
fseek (file, offset, SEEK_SET);
format = readLSB32(file);
if ((format & PCF_FORMAT_MASK) == PCF_DEFAULT_FORMAT) {
size = readLSB32(file); /* 32 bits - Number of metrics*/
m = *metrics = (struct metric_entry *) xmalloc(size *
sizeof(struct metric_entry));
for (i=0; i < size; i++) {
m[i].leftBearing = readLSB16(file);
m[i].rightBearing = readLSB16(file);
m[i].width = readLSB16(file);
m[i].ascent = readLSB16(file);
m[i].descent = readLSB16(file);
m[i].attributes = readLSB16(file);
}
} else {
size = readLSB16(file); /* 16 bits - Number of metrics*/
m = *metrics = (struct metric_entry *) xmalloc(size *
sizeof(struct metric_entry));
for (i = 0; i < size; i++) {
m[i].leftBearing = readINT8(file) - 0x80;
m[i].rightBearing = readINT8(file) - 0x80;
m[i].width = readINT8(file) - 0x80;
m[i].ascent = readINT8(file) - 0x80;
m[i].descent = readINT8(file) - 0x80;
}
}
return size;
}
/* read encoding table*/
static int
pcf_read_encoding(FILE * file, struct encoding_entry **encoding)
{
long offset;
uint32 format, n;
struct encoding_entry *e;
if ((offset = pcf_get_offset(PCF_BDF_ENCODINGS)) == -1)
return -1;
fseek (file, offset, SEEK_SET);
format = readLSB32(file);
e = *encoding = (struct encoding_entry *)
xmalloc(sizeof(struct encoding_entry));
e->min_byte2 = readLSB16(file);
e->max_byte2 = readLSB16(file);
e->min_byte1 = readLSB16(file);
e->max_byte1 = readLSB16(file);
e->defaultchar = readLSB16(file);
e->count = (e->max_byte2 - e->min_byte2 + 1) *
(e->max_byte1 - e->min_byte1 + 1);
e->map = (uint16 *) xmalloc(e->count * sizeof(uint16));
for (n = 0; n < e->count; ++n) {
e->map[n] = readLSB16(file);
/*DPRINTF("ncode %x (%c) %x\n", n, n, e->map[n]);*/
}
return e->count;
}
static int
pcf_read_toc(FILE * file, struct toc_entry **toc, uint32 *size)
{
uint32 version, i;
struct toc_entry *t;
fseek (file, 0, SEEK_SET);
/* Verify the version */
version = readLSB32(file);
if (version != PCF_FILE_VERSION)
return -1;
*size = readLSB32(file);
t = *toc = (struct toc_entry *)xcalloc(sizeof(struct toc_entry), *size);
if (!t)
return -1;
/* Read in the entire table of contents */
for (i=0; i<*size; ++i) {
t[i].type = readLSB32(file);
t[i].format = readLSB32(file);
t[i].size = readLSB32(file);
t[i].offset = readLSB32(file);
}
return 0;
}
hd_font *HD_Font_LoadPCF (const char *fname)
{
FILE *file = 0;
int offset, i, count, bsize, bwidth, err = 0;
struct metric_entry *metrics = 0;