-
Notifications
You must be signed in to change notification settings - Fork 0
/
graphics.c
1799 lines (1609 loc) · 47.3 KB
/
graphics.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
/* $XTermId: graphics.c,v 1.69 2016/05/17 10:04:40 tom Exp $ */
/*
* Copyright 2013-2015,2016 by Ross Combs
*
* All Rights Reserved
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* Except as contained in this notice, the name(s) of the above copyright
* holders shall not be used in advertising or otherwise to promote the
* sale, use or other dealings in this Software without prior written
* authorization.
*/
#include <xterm.h>
#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#include <data.h>
#include <ptyx.h>
#include <assert.h>
#include <graphics.h>
#undef DUMP_BITMAP
#undef DUMP_COLORS
#undef DEBUG_PALETTE
#undef DEBUG_PIXEL
#undef DEBUG_REFRESH
/*
* graphics TODO list
*
* ReGIS:
* - ship a default alphabet zero font instead of scaling Xft fonts
* - input and output cursors
* - mouse input
* - fix graphic pages for ReGIS -- they should also apply to text and sixel graphics
* - fix interpolated curves to more closely match implementation (identical despite direction and starting point)
* - non-ASCII alphabets
* - enter/leave anywhere in a command
* - locator key definitions (DECLKD)
* - command display mode
* - re-rasterization on resize
* - macros
* - improved fills for narrow angles (track actual lines not just pixels)
*
* sixel:
* - fix problem where new_row < 0 during sixel parsing (see FIXME)
* - screen-capture support (need dialog of some sort for safety)
*
* VT55/VT105 waveform graphics
* - everything
*
* Tektronix:
* - color (VT340 4014 emulation, 41xx, IRAF GTERM, and also MS-DOS Kermit color support)
* - polygon fill (41xx)
* - clear area extension
* - area fill extension
* - pixel operations (RU/RS/RP)
* - research other 41xx and 42xx extensions
*
* common graphics features:
* - handle light/dark screen modes (CSI?5[hl])
* - update text fg/bg color which overlaps images
* - handle graphic updates in scroll regions (verify effect on graphics)
* - handle rectangular area copies (verify they work with graphics)
* - invalidate graphics under graphic if same origin, at least as big, and bg not transparent
* - invalidate graphic if completely scrolled past end of scrollback
* - invalidate graphic if all pixels are transparent/erased
* - invalidate graphic if completely scrolled out of alt buffer
* - posturize requested colors to match hardware palettes (e.g. only four possible shades on VT240)
* - color register report/restore
* - ability to select/copy graphics for pasting in other programs
* - ability to show non-scroll-mode sixel graphics in a separate window
* - ability to show ReGIS graphics in a separate window
* - ability to show Tektronix graphics in VT100 window
* - truncate graphics at bottom edge of terminal?
* - locator events (DECEFR DECSLE DECELR DECLRP)
* - locator controller mode (CSI6i / CSI7i)
*
* new escape sequences:
* - way to query text font size without "window ops" (or make "window ops" permissions more fine grained)
* - way to query and set the number of graphics pages
*
* ReGIS extensions:
* - non-integer text scaling
* - free distortionless text rotation
* - font characteristics: bold/underline/italic
* - remove/increase arbitrary limits (pattern size, pages, alphabets, stack size, font names, etc.)
* - comment command
* - shade/fill with borders
* - sprites (copy portion of page into/out of buffer with scaling and rotation)
* - ellipses
* - 2D patterns
* - option to set actual graphic size (not just coordinate range)
* - gradients (for lines and fills)
* - line width (RLogin has this and it is mentioned in docs for the DEC ReGIS to Postscript converter)
* - transparency
* - background color as stackable write control
* - true color (virtual color registers created upon lookup)
* - anti-aliasing
* - variable-width text
*/
/* font sizes:
* VT510:
* 80 Columns 132 Columns Maximum Number of Lines
* 10 x 16 6 x 16 26 lines + keyboard indicator line
* 10 x 13 6 x 13 26 lines + keyboard indicator line
* 10 x 10 6 x 10 42 lines + keyboard indicator line
* 10 x 8 6 x 8 53 lines + keyboard indicator line
*/
typedef struct allocated_color_register {
struct allocated_color_register *next;
Pixel pix;
short r, g, b;
} AllocatedColorRegister;
#define LOOKUP_WIDTH 16
static AllocatedColorRegister *allocated_colors[LOOKUP_WIDTH][LOOKUP_WIDTH][LOOKUP_WIDTH];
#define FOR_EACH_SLOT(ii) for (ii = 0U; ii < MAX_GRAPHICS; ii++)
static ColorRegister *shared_color_registers;
static Graphic *displayed_graphics[MAX_GRAPHICS];
static unsigned next_graphic_id = 0U;
static ColorRegister *
allocRegisters(void)
{
return TypeCallocN(ColorRegister, MAX_COLOR_REGISTERS);
}
static Graphic *
freeGraphic(Graphic *obj)
{
if (obj) {
if (obj->pixels)
free(obj->pixels);
if (obj->private_color_registers)
free(obj->private_color_registers);
free(obj);
}
return NULL;
}
static Graphic *
allocGraphic(int max_w, int max_h)
{
Graphic *result = TypeCalloc(Graphic);
if (result) {
result->max_width = max_w;
result->max_height = max_h;
if (!(result->pixels = TypeCallocN(RegisterNum,
(size_t) max_w * (size_t) max_h))) {
result = freeGraphic(result);
} else if (!(result->private_color_registers = allocRegisters())) {
result = freeGraphic(result);
}
}
return result;
}
static Graphic *
getActiveSlot(unsigned n)
{
if (n < MAX_GRAPHICS &&
displayed_graphics[n] &&
displayed_graphics[n]->valid) {
return displayed_graphics[n];
}
return NULL;
}
static Graphic *
getInactiveSlot(const TScreen *screen, unsigned n)
{
if (n < MAX_GRAPHICS &&
(!displayed_graphics[n] ||
!displayed_graphics[n]->valid)) {
if (!displayed_graphics[n]) {
displayed_graphics[n] = allocGraphic(screen->graphics_max_wide,
screen->graphics_max_high);
}
return displayed_graphics[n];
}
return NULL;
}
static ColorRegister *
getSharedRegisters(void)
{
if (!shared_color_registers)
shared_color_registers = allocRegisters();
return shared_color_registers;
}
static void
deactivateSlot(unsigned n)
{
if (n < MAX_GRAPHICS) {
displayed_graphics[n] = freeGraphic(displayed_graphics[n]);
}
}
extern RegisterNum
read_pixel(Graphic *graphic, int x, int y)
{
if (x < 0 || x >= graphic->actual_width ||
y < 0 || y >= graphic->actual_height) {
return COLOR_HOLE;
}
return graphic->pixels[y * graphic->max_width + x];
}
#define _draw_pixel(G, X, Y, C) \
do { \
(G)->pixels[(Y) * (G)->max_width + (X)] = (RegisterNum) (C); \
} while (0)
void
draw_solid_pixel(Graphic *graphic, int x, int y, unsigned color)
{
assert(color <= MAX_COLOR_REGISTERS);
#ifdef DEBUG_PIXEL
TRACE(("drawing pixel at %d,%d color=%hu (hole=%hu, [%d,%d,%d])\n",
x,
y,
color,
COLOR_HOLE,
((color != COLOR_HOLE)
? (unsigned) graphic->color_registers[color].r : 0U),
((color != COLOR_HOLE)
? (unsigned) graphic->color_registers[color].g : 0U),
((color != COLOR_HOLE)
? (unsigned) graphic->color_registers[color].b : 0U)));
#endif
if (x >= 0 && x < graphic->actual_width &&
y >= 0 && y < graphic->actual_height) {
_draw_pixel(graphic, x, y, color);
if (color < MAX_COLOR_REGISTERS)
graphic->color_registers_used[color] = 1;
}
}
void
draw_solid_rectangle(Graphic *graphic, int x1, int y1, int x2, int y2, unsigned color)
{
int x, y;
int tmp;
assert(color <= MAX_COLOR_REGISTERS);
if (x1 > x2) {
EXCHANGE(x1, x2, tmp);
}
if (y1 > y2) {
EXCHANGE(y1, y2, tmp);
}
if (x2 < 0 || x1 >= graphic->actual_width ||
y2 < 0 || y1 >= graphic->actual_height)
return;
if (x1 < 0)
x1 = 0;
if (x2 >= graphic->actual_width)
x2 = graphic->actual_width - 1;
if (y1 < 0)
y1 = 0;
if (y2 >= graphic->actual_height)
y2 = graphic->actual_height - 1;
if (color < MAX_COLOR_REGISTERS)
graphic->color_registers_used[color] = 1;
for (y = y1; y <= y2; y++)
for (x = x1; x <= x2; x++)
_draw_pixel(graphic, x, y, color);
}
void
draw_solid_line(Graphic *graphic, int x1, int y1, int x2, int y2, unsigned color)
{
int x, y;
int dx, dy;
int dir, diff;
assert(color <= MAX_COLOR_REGISTERS);
dx = abs(x1 - x2);
dy = abs(y1 - y2);
if (dx > dy) {
if (x1 > x2) {
int tmp;
EXCHANGE(x1, x2, tmp);
EXCHANGE(y1, y2, tmp);
}
if (y1 < y2)
dir = 1;
else if (y1 > y2)
dir = -1;
else
dir = 0;
diff = 0;
y = y1;
for (x = x1; x <= x2; x++) {
if (diff >= dx) {
diff -= dx;
y += dir;
}
diff += dy;
draw_solid_pixel(graphic, x, y, color);
}
} else {
if (y1 > y2) {
int tmp;
EXCHANGE(x1, x2, tmp);
EXCHANGE(y1, y2, tmp);
}
if (x1 < x2)
dir = 1;
else if (x1 > x2)
dir = -1;
else
dir = 0;
diff = 0;
x = x1;
for (y = y1; y <= y2; y++) {
if (diff >= dy) {
diff -= dy;
x += dir;
}
diff += dx;
draw_solid_pixel(graphic, x, y, color);
}
}
}
void
copy_overlapping_area(Graphic *graphic, int src_ul_x, int src_ul_y,
int dst_ul_x, int dst_ul_y, unsigned w, unsigned h,
unsigned default_color)
{
int sx, ex, dx;
int sy, ey, dy;
int xx, yy;
RegisterNum color;
if (dst_ul_x <= src_ul_x) {
sx = 0;
ex = (int) w - 1;
dx = +1;
} else {
sx = (int) w - 1;
ex = 0;
dx = -1;
}
if (dst_ul_y <= src_ul_y) {
sy = 0;
ey = (int) h - 1;
dy = +1;
} else {
sy = (int) h - 1;
ey = 0;
dy = -1;
}
for (yy = sy; yy != ey + dy; yy += dy) {
int dst_y = dst_ul_y + yy;
int src_y = src_ul_y + yy;
if (dst_y < 0 || dst_y >= (int) graphic->actual_height)
continue;
for (xx = sx; xx != ex + dx; xx += dx) {
int dst_x = dst_ul_x + xx;
int src_x = src_ul_x + xx;
if (dst_x < 0 || dst_x >= (int) graphic->actual_width)
continue;
if (src_x < 0 || src_x >= (int) graphic->actual_width ||
src_y < 0 || src_y >= (int) graphic->actual_height)
color = (RegisterNum) default_color;
else
color = graphic->pixels[(unsigned) (src_y *
graphic->max_width) +
(unsigned) src_x];
graphic->pixels[(unsigned) (dst_y * graphic->max_width) +
(unsigned) dst_x] = color;
}
}
}
static void
set_color_register(ColorRegister *color_registers,
unsigned color,
int r,
int g,
int b)
{
ColorRegister *reg = &color_registers[color];
reg->r = (short) r;
reg->g = (short) g;
reg->b = (short) b;
}
/* Graphics which don't use private colors will act as if they are using a
* device-wide color palette.
*/
static void
set_shared_color_register(unsigned color, int r, int g, int b)
{
unsigned ii;
assert(color < MAX_COLOR_REGISTERS);
set_color_register(getSharedRegisters(), color, r, g, b);
FOR_EACH_SLOT(ii) {
Graphic *graphic;
if (!(graphic = getActiveSlot(ii)))
continue;
if (graphic->private_colors)
continue;
if (graphic->color_registers_used[ii]) {
graphic->dirty = 1;
}
}
}
void
update_color_register(Graphic *graphic,
unsigned color,
int r,
int g,
int b)
{
assert(color < MAX_COLOR_REGISTERS);
if (graphic->private_colors) {
set_color_register(graphic->private_color_registers,
color, r, g, b);
if (graphic->color_registers_used[color]) {
graphic->dirty = 1;
}
graphic->color_registers_used[color] = 1;
} else {
set_shared_color_register(color, r, g, b);
}
}
#define SQUARE(X) ( (X) * (X) )
RegisterNum
find_color_register(ColorRegister const *color_registers, int r, int g, int b)
{
unsigned i;
unsigned closest_index;
unsigned closest_distance;
/* I have no idea what algorithm DEC used for this.
* The documentation warns that it is unpredictable, especially with values
* far away from any allocated color so it is probably a very simple
* heuristic rather than something fancy like finding the minimum distance
* in a linear perceptive color space.
*/
closest_index = MAX_COLOR_REGISTERS;
closest_distance = 0U;
for (i = 0U; i < MAX_COLOR_REGISTERS; i++) {
unsigned d = (unsigned) (SQUARE(2 * (color_registers[i].r - r)) +
SQUARE(3 * (color_registers[i].g - g)) +
SQUARE(1 * (color_registers[i].b - b)));
if (closest_index == MAX_COLOR_REGISTERS || d < closest_distance) {
closest_index = i;
closest_distance = d;
}
}
TRACE(("found closest color register to %d,%d,%d: %u (distance %u value %d,%d,%d)\n",
r, g, b,
closest_index,
closest_distance,
color_registers[closest_index].r,
color_registers[closest_index].g,
color_registers[closest_index].b));
return (RegisterNum) closest_index;
}
static void
init_color_registers(ColorRegister *color_registers, int terminal_id)
{
TRACE(("setting initial colors for terminal %d\n", terminal_id));
{
unsigned i;
for (i = 0U; i < MAX_COLOR_REGISTERS; i++) {
set_color_register(color_registers, (RegisterNum) i, 0, 0, 0);
}
}
/*
* default color registers:
* (mono) (color)
* VK100/GIGI (fixed)
* VT125:
* 0: 0% 0%
* 1: 33% blue
* 2: 66% red
* 3: 100% green
* VT240:
* 0: 0% 0%
* 1: 33% blue
* 2: 66% red
* 3: 100% green
* VT241:
* 0: 0% 0%
* 1: 33% blue
* 2: 66% red
* 3: 100% green
* VT330:
* 0: 0% 0% (bg for light on dark mode)
* 1: 33% blue (red?)
* 2: 66% red (green?)
* 3: 100% green (yellow?) (fg for light on dark mode)
* VT340:
* 0: 0% 0% (bg for light on dark mode)
* 1: 14% blue
* 2: 29% red
* 3: 43% green
* 4: 57% magenta
* 5: 71% cyan
* 6: 86% yellow
* 7: 100% 50% (fg for light on dark mode)
* 8: 0% 25%
* 9: 14% gray-blue
* 10: 29% gray-red
* 11: 43% gray-green
* 12: 57% gray-magenta
* 13: 71% gray-cyan
* 14: 86% gray-yellow
* 15: 100% 75% ("white")
* VT382:
* ? (FIXME: B&W only?)
* dxterm:
* ?
*/
switch (terminal_id) {
case 125:
case 241:
set_color_register(color_registers, 0, 0, 0, 0);
set_color_register(color_registers, 1, 0, 0, 100);
set_color_register(color_registers, 2, 0, 100, 0);
set_color_register(color_registers, 3, 100, 0, 0);
break;
case 240:
case 330:
set_color_register(color_registers, 0, 0, 0, 0);
set_color_register(color_registers, 1, 33, 33, 33);
set_color_register(color_registers, 2, 66, 66, 66);
set_color_register(color_registers, 3, 100, 100, 100);
break;
case 340:
default:
set_color_register(color_registers, 0, 0, 0, 0);
set_color_register(color_registers, 1, 20, 20, 80);
set_color_register(color_registers, 2, 80, 13, 13);
set_color_register(color_registers, 3, 20, 80, 20);
set_color_register(color_registers, 4, 80, 20, 80);
set_color_register(color_registers, 5, 20, 80, 80);
set_color_register(color_registers, 6, 80, 80, 20);
set_color_register(color_registers, 7, 53, 53, 53);
set_color_register(color_registers, 8, 26, 26, 26);
set_color_register(color_registers, 9, 33, 33, 60);
set_color_register(color_registers, 10, 60, 26, 26);
set_color_register(color_registers, 11, 33, 60, 33);
set_color_register(color_registers, 12, 60, 33, 60);
set_color_register(color_registers, 13, 33, 60, 60);
set_color_register(color_registers, 14, 60, 60, 33);
set_color_register(color_registers, 15, 80, 80, 80);
break;
case 382: /* FIXME: verify */
set_color_register(color_registers, 0, 0, 0, 0);
set_color_register(color_registers, 1, 100, 100, 100);
break;
}
#ifdef DEBUG_PALETTE
{
unsigned i;
for (i = 0U; i < MAX_COLOR_REGISTERS; i++) {
TRACE(("initial value for register %03u: %d,%d,%d\n",
i,
color_registers[i].r,
color_registers[i].g,
color_registers[i].b));
}
}
#endif
}
unsigned
get_color_register_count(TScreen const *screen)
{
unsigned num_color_registers;
if (screen->numcolorregisters >= 0) {
num_color_registers = (unsigned) screen->numcolorregisters;
} else {
num_color_registers = 0U;
}
if (num_color_registers > 1U) {
if (num_color_registers > MAX_COLOR_REGISTERS)
return MAX_COLOR_REGISTERS;
return num_color_registers;
}
/*
* color capabilities:
* VK100/GIGI 1 plane (12x1 pixel attribute blocks) colorspace is 8 fixed colors (black, white, red, green, blue, cyan, yellow, magenta)
* VT125 2 planes (4 registers) colorspace is (64?) (color), ? (grayscale)
* VT240 2 planes (4 registers) colorspace is 4 shades (grayscale)
* VT241 2 planes (4 registers) colorspace is ? (color), ? shades (grayscale)
* VT330 2 planes (4 registers) colorspace is 4 shades (grayscale)
* VT340 4 planes (16 registers) colorspace is r16g16b16 (color), 16 shades (grayscale)
* VT382 1 plane (two fixed colors: black and white) FIXME: verify
* dxterm ?
*/
switch (screen->terminal_id) {
case 125:
return 4U;
case 240:
return 4U;
case 241:
return 4U;
case 330:
return 4U;
case 340:
return 16U;
case 382:
return 2U;
default:
/* unknown graphics model -- might as well be generous */
return MAX_COLOR_REGISTERS;
}
}
static void
init_graphic(Graphic *graphic,
unsigned type,
int terminal_id,
int charrow,
int charcol,
unsigned num_color_registers,
int private_colors)
{
const unsigned max_pixels = (unsigned) (graphic->max_width *
graphic->max_height);
unsigned i;
TRACE(("initializing graphic object\n"));
graphic->hidden = 0;
graphic->dirty = 1;
for (i = 0U; i < max_pixels; i++)
graphic->pixels[i] = COLOR_HOLE;
memset(graphic->color_registers_used, 0, sizeof(graphic->color_registers_used));
/*
* text and graphics interactions:
* VK100/GIGI text writes on top of graphics buffer, color attribute shared with text
* VT240,VT241,VT330,VT340 text writes on top of graphics buffer
* VT382 text writes on top of graphics buffer FIXME: verify
* VT125 graphics buffer overlaid on top of text in B&W display, text not present in color display
*/
/*
* dimensions (ReGIS logical, physical):
* VK100/GIGI 768x4?? 768x240(status?)
* VT125 768x460 768x230(+10status) (1:2 aspect ratio, ReGIS halves vertical addresses through "odd y emulation")
* VT240 800x460 800x230(+10status) (1:2 aspect ratio, ReGIS halves vertical addresses through "odd y emulation")
* VT241 800x460 800x230(+10status) (1:2 aspect ratio, ReGIS halves vertical addresses through "odd y emulation")
* VT330 800x480 800x480(+?status)
* VT340 800x480 800x480(+?status)
* VT382 960x750 sixel only
* dxterm ?x? ?x? variable?
*/
graphic->actual_width = 0;
graphic->actual_height = 0;
graphic->pixw = 1;
graphic->pixh = 1;
graphic->valid_registers = num_color_registers;
TRACE(("%d color registers\n", graphic->valid_registers));
graphic->private_colors = private_colors;
if (graphic->private_colors) {
TRACE(("using private color registers\n"));
init_color_registers(graphic->private_color_registers, terminal_id);
graphic->color_registers = graphic->private_color_registers;
} else {
TRACE(("using shared color registers\n"));
graphic->color_registers = getSharedRegisters();
}
graphic->charrow = charrow;
graphic->charcol = charcol;
graphic->type = type;
graphic->valid = 0;
}
Graphic *
get_new_graphic(XtermWidget xw, int charrow, int charcol, unsigned type)
{
TScreen const *screen = TScreenOf(xw);
int bufferid = screen->whichBuf;
int terminal_id = screen->terminal_id;
Graphic *graphic;
unsigned ii;
FOR_EACH_SLOT(ii) {
if ((graphic = getInactiveSlot(screen, ii))) {
TRACE(("using fresh graphic index=%u id=%u\n", ii, next_graphic_id));
break;
}
}
/* if none are free, recycle the graphic scrolled back the farthest */
if (!graphic) {
int min_charrow = 0;
Graphic *min_graphic = NULL;
FOR_EACH_SLOT(ii) {
if (!(graphic = getActiveSlot(ii)))
continue;
if (!min_graphic || graphic->charrow < min_charrow) {
min_charrow = graphic->charrow;
min_graphic = graphic;
}
}
TRACE(("recycling old graphic index=%u id=%u\n", ii, next_graphic_id));
graphic = min_graphic;
}
if (graphic) {
unsigned num_color_registers;
num_color_registers = get_color_register_count(screen);
graphic->xw = xw;
graphic->bufferid = bufferid;
graphic->id = next_graphic_id++;
init_graphic(graphic,
type,
terminal_id,
charrow,
charcol,
num_color_registers,
screen->privatecolorregisters);
}
return graphic;
}
Graphic *
get_new_or_matching_graphic(XtermWidget xw,
int charrow,
int charcol,
int actual_width,
int actual_height,
unsigned type)
{
TScreen const *screen = TScreenOf(xw);
int bufferid = screen->whichBuf;
Graphic *graphic;
unsigned ii;
FOR_EACH_SLOT(ii) {
TRACE(("checking slot=%u for graphic at %d,%d %dx%d bufferid=%d type=%u\n", ii,
charrow, charcol,
actual_width, actual_height,
bufferid, type));
if ((graphic = getActiveSlot(ii))) {
if (graphic->type == type &&
graphic->bufferid == bufferid &&
graphic->charrow == charrow &&
graphic->charcol == charcol &&
graphic->actual_width == actual_width &&
graphic->actual_height == actual_height) {
TRACE(("found existing graphic slot=%u id=%u\n", ii, graphic->id));
return graphic;
}
TRACE(("not a match: graphic at %d,%d %dx%d bufferid=%d type=%u\n",
graphic->charrow, graphic->charcol,
graphic->actual_width, graphic->actual_height,
graphic->bufferid, graphic->type));
}
}
/* if no match get a new graphic */
if ((graphic = get_new_graphic(xw, charrow, charcol, type))) {
graphic->actual_width = actual_width;
graphic->actual_height = actual_height;
TRACE(("no match; created graphic at %d,%d %dx%d bufferid=%d type=%u\n",
graphic->charrow, graphic->charcol,
graphic->actual_width, graphic->actual_height,
graphic->bufferid, graphic->type));
}
return graphic;
}
static int
lookup_allocated_color(const ColorRegister *reg, Pixel *pix)
{
unsigned const rr = ((unsigned) reg->r * (LOOKUP_WIDTH - 1)) / CHANNEL_MAX;
unsigned const gg = ((unsigned) reg->g * (LOOKUP_WIDTH - 1)) / CHANNEL_MAX;
unsigned const bb = ((unsigned) reg->b * (LOOKUP_WIDTH - 1)) / CHANNEL_MAX;
const AllocatedColorRegister *search;
for (search = allocated_colors[rr][gg][bb]; search; search = search->next) {
if (search->r == reg->r &&
search->g == reg->g &&
search->b == reg->b) {
*pix = search->pix;
return 1;
}
}
*pix = 0UL;
return 0;
}
#define ScaleForXColor(s) (unsigned short) ((long)(s) * 65535 / CHANNEL_MAX)
static int
save_allocated_color(const ColorRegister *reg, XtermWidget xw, Pixel *pix)
{
unsigned const rr = ((unsigned) reg->r * (LOOKUP_WIDTH - 1)) / CHANNEL_MAX;
unsigned const gg = ((unsigned) reg->g * (LOOKUP_WIDTH - 1)) / CHANNEL_MAX;
unsigned const bb = ((unsigned) reg->b * (LOOKUP_WIDTH - 1)) / CHANNEL_MAX;
XColor xcolor;
AllocatedColorRegister *new_color;
xcolor.pixel = 0UL;
xcolor.red = ScaleForXColor(reg->r);
xcolor.green = ScaleForXColor(reg->g);
xcolor.blue = ScaleForXColor(reg->b);
xcolor.flags = DoRed | DoGreen | DoBlue;
if (!allocateBestRGB(xw, &xcolor)) {
TRACE(("unable to allocate xcolor\n"));
*pix = 0UL;
return 0;
}
*pix = xcolor.pixel;
if (!(new_color = malloc(sizeof(*new_color)))) {
TRACE(("unable to save pixel %lu\n", (unsigned long) *pix));
return 0;
}
new_color->r = reg->r;
new_color->g = reg->g;
new_color->b = reg->b;
new_color->pix = *pix;
new_color->next = allocated_colors[rr][gg][bb];
allocated_colors[rr][gg][bb] = new_color;
return 1;
}
static Pixel
color_register_to_xpixel(const ColorRegister *reg, XtermWidget xw)
{
Pixel pix;
if (!lookup_allocated_color(reg, &pix))
save_allocated_color(reg, xw, &pix);
/* FIXME: with so many possible colors we need to determine
* when to free them to be nice to PseudoColor displays
*/
return pix;
}
static void
refresh_graphic(TScreen const *screen,
Graphic const *graphic,
ColorRegister *buffer,
int refresh_x,
int refresh_y,
int refresh_w,
int refresh_h,
int draw_x,
int draw_y,
int draw_w,
int draw_h)
{
int const pw = graphic->pixw;
int const ph = graphic->pixh;
int const graph_x = graphic->charcol * FontWidth(screen);
int const graph_y = graphic->charrow * FontHeight(screen);
int const graph_w = graphic->actual_width;
int const graph_h = graphic->actual_height;
int const mw = graphic->max_width;
int r, c;
int fillx, filly;
int holes, total, out_of_range;
RegisterNum regnum;
TRACE(("refreshing graphic %u from %d,%d %dx%d (valid=%d, size=%dx%d, scale=%dx%d max=%dx%d)\n",
graphic->id,
graph_x, graph_y, draw_w, draw_h,
graphic->valid,
graphic->actual_width,
graphic->actual_height,
pw, ph,
graphic->max_width,
graphic->max_height));
TRACE(("refresh pixmap starts at %d,%d\n", refresh_x, refresh_y));
holes = total = 0;
out_of_range = 0;
for (r = 0; r < graph_h; r++) {
int pmy = graph_y + r * ph;
if (pmy + ph - 1 < draw_y)
continue;
if (pmy > draw_y + draw_h - 1)
break;
for (c = 0; c < graph_w; c++) {
int pmx = graph_x + c * pw;
if (pmx + pw - 1 < draw_x)
continue;
if (pmx > draw_x + draw_w - 1)
break;
total++;
regnum = graphic->pixels[r * mw + c];
if (regnum == COLOR_HOLE) {
holes++;
continue;
}
for (fillx = 0; fillx < pw; fillx++) {
for (filly = 0; filly < ph; filly++) {
if (pmx < draw_x || pmx > draw_x + draw_w - 1 ||
pmy < draw_y || pmy > draw_y + draw_h - 1) {
out_of_range++;
continue;
}
/* this shouldn't happen, but it doesn't hurt to check */
if (pmx < refresh_x || pmx > refresh_x + refresh_w - 1 ||
pmy < refresh_y || pmy > refresh_y + refresh_h - 1) {
TRACE(("OUT OF RANGE: %d,%d (%d,%d)\n", pmx, pmy, r, c));
out_of_range++;
continue;
}
buffer[(pmy - refresh_y) * refresh_w +
(pmx - refresh_x)] =
graphic->color_registers[regnum];
}
}
}
}