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
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
|
/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program 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
* of the License, or (at your option) any later version.
*
* This program 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*
* Contributor(s): Blender Foundation
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/editors/screen/glutil.c
* \ingroup edscr
*/
#include <stdio.h>
#include <string.h>
#include "MEM_guardedalloc.h"
#include "DNA_userdef_types.h"
#include "DNA_vec_types.h"
#include "BLI_rect.h"
#include "BLI_utildefines.h"
#include "BLI_math.h"
#include "BKE_context.h"
#include "BIF_gl.h"
#include "BIF_glutil.h"
#include "IMB_colormanagement.h"
#include "IMB_imbuf_types.h"
#include "GPU_basic_shader.h"
#include "UI_interface.h"
#ifndef GL_CLAMP_TO_EDGE
#define GL_CLAMP_TO_EDGE 0x812F
#endif
/* ******************************************** */
/* defined in BIF_gl.h */
const GLubyte stipple_halftone[128] = {
0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55};
/* repeat this pattern
*
* X000X000
* 00000000
* 00X000X0
* 00000000 */
const GLubyte stipple_quarttone[128] = {
136, 136, 136, 136, 0, 0, 0, 0, 34, 34, 34, 34, 0, 0, 0, 0,
136, 136, 136, 136, 0, 0, 0, 0, 34, 34, 34, 34, 0, 0, 0, 0,
136, 136, 136, 136, 0, 0, 0, 0, 34, 34, 34, 34, 0, 0, 0, 0,
136, 136, 136, 136, 0, 0, 0, 0, 34, 34, 34, 34, 0, 0, 0, 0,
136, 136, 136, 136, 0, 0, 0, 0, 34, 34, 34, 34, 0, 0, 0, 0,
136, 136, 136, 136, 0, 0, 0, 0, 34, 34, 34, 34, 0, 0, 0, 0,
136, 136, 136, 136, 0, 0, 0, 0, 34, 34, 34, 34, 0, 0, 0, 0,
136, 136, 136, 136, 0, 0, 0, 0, 34, 34, 34, 34, 0, 0, 0, 0};
const GLubyte stipple_diag_stripes_pos[128] = {
0x00, 0xff, 0x00, 0xff, 0x01, 0xfe, 0x01, 0xfe,
0x03, 0xfc, 0x03, 0xfc, 0x07, 0xf8, 0x07, 0xf8,
0x0f, 0xf0, 0x0f, 0xf0, 0x1f, 0xe0, 0x1f, 0xe0,
0x3f, 0xc0, 0x3f, 0xc0, 0x7f, 0x80, 0x7f, 0x80,
0xff, 0x00, 0xff, 0x00, 0xfe, 0x01, 0xfe, 0x01,
0xfc, 0x03, 0xfc, 0x03, 0xf8, 0x07, 0xf8, 0x07,
0xf0, 0x0f, 0xf0, 0x0f, 0xe0, 0x1f, 0xe0, 0x1f,
0xc0, 0x3f, 0xc0, 0x3f, 0x80, 0x7f, 0x80, 0x7f,
0x00, 0xff, 0x00, 0xff, 0x01, 0xfe, 0x01, 0xfe,
0x03, 0xfc, 0x03, 0xfc, 0x07, 0xf8, 0x07, 0xf8,
0x0f, 0xf0, 0x0f, 0xf0, 0x1f, 0xe0, 0x1f, 0xe0,
0x3f, 0xc0, 0x3f, 0xc0, 0x7f, 0x80, 0x7f, 0x80,
0xff, 0x00, 0xff, 0x00, 0xfe, 0x01, 0xfe, 0x01,
0xfc, 0x03, 0xfc, 0x03, 0xf8, 0x07, 0xf8, 0x07,
0xf0, 0x0f, 0xf0, 0x0f, 0xe0, 0x1f, 0xe0, 0x1f,
0xc0, 0x3f, 0xc0, 0x3f, 0x80, 0x7f, 0x80, 0x7f};
const GLubyte stipple_diag_stripes_neg[128] = {
0xff, 0x00, 0xff, 0x00, 0xfe, 0x01, 0xfe, 0x01,
0xfc, 0x03, 0xfc, 0x03, 0xf8, 0x07, 0xf8, 0x07,
0xf0, 0x0f, 0xf0, 0x0f, 0xe0, 0x1f, 0xe0, 0x1f,
0xc0, 0x3f, 0xc0, 0x3f, 0x80, 0x7f, 0x80, 0x7f,
0x00, 0xff, 0x00, 0xff, 0x01, 0xfe, 0x01, 0xfe,
0x03, 0xfc, 0x03, 0xfc, 0x07, 0xf8, 0x07, 0xf8,
0x0f, 0xf0, 0x0f, 0xf0, 0x1f, 0xe0, 0x1f, 0xe0,
0x3f, 0xc0, 0x3f, 0xc0, 0x7f, 0x80, 0x7f, 0x80,
0xff, 0x00, 0xff, 0x00, 0xfe, 0x01, 0xfe, 0x01,
0xfc, 0x03, 0xfc, 0x03, 0xf8, 0x07, 0xf8, 0x07,
0xf0, 0x0f, 0xf0, 0x0f, 0xe0, 0x1f, 0xe0, 0x1f,
0xc0, 0x3f, 0xc0, 0x3f, 0x80, 0x7f, 0x80, 0x7f,
0x00, 0xff, 0x00, 0xff, 0x01, 0xfe, 0x01, 0xfe,
0x03, 0xfc, 0x03, 0xfc, 0x07, 0xf8, 0x07, 0xf8,
0x0f, 0xf0, 0x0f, 0xf0, 0x1f, 0xe0, 0x1f, 0xe0,
0x3f, 0xc0, 0x3f, 0xc0, 0x7f, 0x80, 0x7f, 0x80};
const GLubyte stipple_checker_8px[128] = {
255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0,
255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0,
0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255,
0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255,
255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0,
255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0,
0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255,
0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255};
/* UNUSED */
#if 0
void fdrawbezier(float vec[4][3])
{
float dist;
float curve_res = 24, spline_step = 0.0f;
dist = 0.5f * fabsf(vec[0][0] - vec[3][0]);
/* check direction later, for top sockets */
vec[1][0] = vec[0][0] + dist;
vec[1][1] = vec[0][1];
vec[2][0] = vec[3][0] - dist;
vec[2][1] = vec[3][1];
/* we can reuse the dist variable here to increment the GL curve eval amount*/
dist = 1.0f / curve_res;
cpack(0x0);
glMap1f(GL_MAP1_VERTEX_3, 0.0, 1.0, 3, 4, vec[0]);
glBegin(GL_LINE_STRIP);
while (spline_step < 1.000001f) {
#if 0
if (do_shaded)
UI_ThemeColorBlend(th_col1, th_col2, spline_step);
#endif
glEvalCoord1f(spline_step);
spline_step += dist;
}
glEnd();
}
#endif
void fdrawline(float x1, float y1, float x2, float y2)
{
glBegin(GL_LINES);
glVertex2f(x1, y1);
glVertex2f(x2, y2);
glEnd();
}
void fdrawbox(float x1, float y1, float x2, float y2)
{
glBegin(GL_LINE_LOOP);
glVertex2f(x1, y1);
glVertex2f(x1, y2);
glVertex2f(x2, y2);
glVertex2f(x2, y1);
glEnd();
}
void fdrawcheckerboard(float x1, float y1, float x2, float y2)
{
unsigned char col1[4] = {40, 40, 40}, col2[4] = {50, 50, 50};
glColor3ubv(col1);
glRectf(x1, y1, x2, y2);
glColor3ubv(col2);
glEnable(GL_POLYGON_STIPPLE);
glPolygonStipple(stipple_checker_8px);
glRectf(x1, y1, x2, y2);
glDisable(GL_POLYGON_STIPPLE);
}
void sdrawline(int x1, int y1, int x2, int y2)
{
glBegin(GL_LINES);
glVertex2i(x1, y1);
glVertex2i(x2, y2);
glEnd();
}
/* UNUSED */
#if 0
/*
* x1,y2
* | \
* | \
* | \
* x1,y1-- x2,y1
*/
static void sdrawtripoints(int x1, int y1, int x2, int y2)
{
glVertex2i(x1, y1);
glVertex2i(x1, y2);
glVertex2i(x2, y1);
}
void sdrawtri(int x1, int y1, int x2, int y2)
{
glBegin(GL_LINE_STRIP);
sdrawtripoints(x1, y1, x2, y2);
glEnd();
}
void sdrawtrifill(int x1, int y1, int x2, int y2)
{
glBegin(GL_TRIANGLES);
sdrawtripoints(x1, y1, x2, y2);
glEnd();
}
#endif
void sdrawbox(int x1, int y1, int x2, int y2)
{
glBegin(GL_LINE_LOOP);
glVertex2i(x1, y1);
glVertex2i(x1, y2);
glVertex2i(x2, y2);
glVertex2i(x2, y1);
glEnd();
}
/* ******************************************** */
void setlinestyle(int nr)
{
if (nr == 0) {
glDisable(GL_LINE_STIPPLE);
}
else {
glEnable(GL_LINE_STIPPLE);
if (U.pixelsize > 1.0f)
glLineStipple(nr, 0xCCCC);
else
glLineStipple(nr, 0xAAAA);
}
}
/* Invert line handling */
#define GL_TOGGLE(mode, onoff) (((onoff) ? glEnable : glDisable)(mode))
void set_inverted_drawing(int enable)
{
glLogicOp(enable ? GL_INVERT : GL_COPY);
GL_TOGGLE(GL_COLOR_LOGIC_OP, enable);
GL_TOGGLE(GL_DITHER, !enable);
}
/* UNUSED */
#if 0
void sdrawXORline(int x0, int y0, int x1, int y1)
{
if (x0 == x1 && y0 == y1) return;
set_inverted_drawing(1);
glBegin(GL_LINES);
glVertex2i(x0, y0);
glVertex2i(x1, y1);
glEnd();
set_inverted_drawing(0);
}
void sdrawXORline4(int nr, int x0, int y0, int x1, int y1)
{
static int old[4][2][2];
static char flags[4] = {0, 0, 0, 0};
/* with builtin memory, max 4 lines */
set_inverted_drawing(1);
glBegin(GL_LINES);
if (nr == -1) { /* flush */
for (nr = 0; nr < 4; nr++) {
if (flags[nr]) {
glVertex2iv(old[nr][0]);
glVertex2iv(old[nr][1]);
flags[nr] = 0;
}
}
}
else {
if (nr >= 0 && nr < 4) {
if (flags[nr]) {
glVertex2iv(old[nr][0]);
glVertex2iv(old[nr][1]);
}
old[nr][0][0] = x0;
old[nr][0][1] = y0;
old[nr][1][0] = x1;
old[nr][1][1] = y1;
flags[nr] = 1;
}
glVertex2i(x0, y0);
glVertex2i(x1, y1);
}
glEnd();
set_inverted_drawing(0);
}
void fdrawXORellipse(float xofs, float yofs, float hw, float hh)
{
if (hw == 0) return;
set_inverted_drawing(1);
glPushMatrix();
glTranslatef(xofs, yofs, 0.0f);
glScalef(1.0f, hh / hw, 1.0f);
glutil_draw_lined_arc(0.0, M_PI * 2.0, hw, 20);
glPopMatrix();
set_inverted_drawing(0);
}
#endif
void fdrawXORcirc(float xofs, float yofs, float rad)
{
set_inverted_drawing(1);
glPushMatrix();
glTranslatef(xofs, yofs, 0.0);
glutil_draw_lined_arc(0.0, M_PI * 2.0, rad, 20);
glPopMatrix();
set_inverted_drawing(0);
}
void glutil_draw_filled_arc(float start, float angle, float radius, int nsegments)
{
int i;
glBegin(GL_TRIANGLE_FAN);
glVertex2f(0.0, 0.0);
for (i = 0; i < nsegments; i++) {
float t = (float) i / (nsegments - 1);
float cur = start + t * angle;
glVertex2f(cosf(cur) * radius, sinf(cur) * radius);
}
glEnd();
}
void glutil_draw_lined_arc(float start, float angle, float radius, int nsegments)
{
int i;
glBegin(GL_LINE_STRIP);
for (i = 0; i < nsegments; i++) {
float t = (float) i / (nsegments - 1);
float cur = start + t * angle;
glVertex2f(cosf(cur) * radius, sinf(cur) * radius);
}
glEnd();
}
float glaGetOneFloat(int param)
{
GLfloat v;
glGetFloatv(param, &v);
return v;
}
void glaRasterPosSafe2f(float x, float y, float known_good_x, float known_good_y)
{
GLubyte dummy = 0;
/* As long as known good coordinates are correct
* this is guaranteed to generate an ok raster
* position (ignoring potential (real) overflow
* issues).
*/
glRasterPos2f(known_good_x, known_good_y);
/* Now shift the raster position to where we wanted
* it in the first place using the glBitmap trick.
*/
glBitmap(0, 0, 0, 0, x - known_good_x, y - known_good_y, &dummy);
}
static int get_cached_work_texture(int *r_w, int *r_h)
{
static GLint texid = -1;
static int tex_w = 256;
static int tex_h = 256;
if (texid == -1) {
unsigned char *tbuf;
glGenTextures(1, (GLuint *)&texid);
glBindTexture(GL_TEXTURE_2D, texid);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
tbuf = MEM_callocN(tex_w * tex_h * 4, "tbuf");
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, tex_w, tex_h, 0, GL_RGBA, GL_UNSIGNED_BYTE, tbuf);
MEM_freeN(tbuf);
glBindTexture(GL_TEXTURE_2D, 0);
}
*r_w = tex_w;
*r_h = tex_h;
return texid;
}
void glaDrawPixelsTexScaled(float x, float y, int img_w, int img_h, int format, int type, int zoomfilter, void *rect, float scaleX, float scaleY)
{
unsigned char *uc_rect = (unsigned char *) rect;
const float *f_rect = (float *)rect;
float xzoom = glaGetOneFloat(GL_ZOOM_X), yzoom = glaGetOneFloat(GL_ZOOM_Y);
int subpart_x, subpart_y, tex_w, tex_h;
int seamless, offset_x, offset_y, nsubparts_x, nsubparts_y;
int texid = get_cached_work_texture(&tex_w, &tex_h);
int components;
/* Specify the color outside this function, and tex will modulate it.
* This is useful for changing alpha without using glPixelTransferf()
*/
glPixelStorei(GL_UNPACK_ROW_LENGTH, img_w);
glBindTexture(GL_TEXTURE_2D, texid);
/* don't want nasty border artifacts */
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, zoomfilter);
#if defined(__APPLE__) && 0
/* [merwin] disable this workaround and see if anyone is affected. If not scrap it! Also at end of this function */
/* workaround for os x 10.5/10.6 driver bug: http://lists.apple.com/archives/Mac-opengl/2008/Jul/msg00117.html */
glPixelZoom(1.0f, 1.0f);
#endif
/* setup seamless 2=on, 0=off */
seamless = ((tex_w < img_w || tex_h < img_h) && tex_w > 2 && tex_h > 2) ? 2 : 0;
offset_x = tex_w - seamless;
offset_y = tex_h - seamless;
nsubparts_x = (img_w + (offset_x - 1)) / (offset_x);
nsubparts_y = (img_h + (offset_y - 1)) / (offset_y);
if (format == GL_RGBA)
components = 4;
else if (format == GL_RGB)
components = 3;
else if (ELEM(format, GL_LUMINANCE, GL_ALPHA))
components = 1;
else {
BLI_assert(!"Incompatible format passed to glaDrawPixelsTexScaled");
return;
}
if (type == GL_FLOAT) {
/* need to set internal format to higher range float */
/* NOTE: this could fail on some drivers, like mesa,
* but currently this code is only used by color
* management stuff which already checks on whether
* it's possible to use GL_RGBA16F_ARB
*/
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F_ARB, tex_w, tex_h, 0, format, GL_FLOAT, NULL);
}
else {
/* switch to 8bit RGBA for byte buffer */
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, tex_w, tex_h, 0, format, GL_UNSIGNED_BYTE, NULL);
}
for (subpart_y = 0; subpart_y < nsubparts_y; subpart_y++) {
for (subpart_x = 0; subpart_x < nsubparts_x; subpart_x++) {
int remainder_x = img_w - subpart_x * offset_x;
int remainder_y = img_h - subpart_y * offset_y;
int subpart_w = (remainder_x < tex_w) ? remainder_x : tex_w;
int subpart_h = (remainder_y < tex_h) ? remainder_y : tex_h;
int offset_left = (seamless && subpart_x != 0) ? 1 : 0;
int offset_bot = (seamless && subpart_y != 0) ? 1 : 0;
int offset_right = (seamless && remainder_x > tex_w) ? 1 : 0;
int offset_top = (seamless && remainder_y > tex_h) ? 1 : 0;
float rast_x = x + subpart_x * offset_x * xzoom;
float rast_y = y + subpart_y * offset_y * yzoom;
/* check if we already got these because we always get 2 more when doing seamless*/
if (subpart_w <= seamless || subpart_h <= seamless)
continue;
if (type == GL_FLOAT) {
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, subpart_w, subpart_h, format, GL_FLOAT, &f_rect[((size_t)subpart_y) * offset_y * img_w * components + subpart_x * offset_x * components]);
/* add an extra border of pixels so linear looks ok at edges of full image. */
if (subpart_w < tex_w)
glTexSubImage2D(GL_TEXTURE_2D, 0, subpart_w, 0, 1, subpart_h, format, GL_FLOAT, &f_rect[((size_t)subpart_y) * offset_y * img_w * components + (subpart_x * offset_x + subpart_w - 1) * components]);
if (subpart_h < tex_h)
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, subpart_h, subpart_w, 1, format, GL_FLOAT, &f_rect[(((size_t)subpart_y) * offset_y + subpart_h - 1) * img_w * components + subpart_x * offset_x * components]);
if (subpart_w < tex_w && subpart_h < tex_h)
glTexSubImage2D(GL_TEXTURE_2D, 0, subpart_w, subpart_h, 1, 1, format, GL_FLOAT, &f_rect[(((size_t)subpart_y) * offset_y + subpart_h - 1) * img_w * components + (subpart_x * offset_x + subpart_w - 1) * components]);
}
else {
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, subpart_w, subpart_h, format, GL_UNSIGNED_BYTE, &uc_rect[((size_t)subpart_y) * offset_y * img_w * components + subpart_x * offset_x * components]);
if (subpart_w < tex_w)
glTexSubImage2D(GL_TEXTURE_2D, 0, subpart_w, 0, 1, subpart_h, format, GL_UNSIGNED_BYTE, &uc_rect[((size_t)subpart_y) * offset_y * img_w * components + (subpart_x * offset_x + subpart_w - 1) * components]);
if (subpart_h < tex_h)
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, subpart_h, subpart_w, 1, format, GL_UNSIGNED_BYTE, &uc_rect[(((size_t)subpart_y) * offset_y + subpart_h - 1) * img_w * components + subpart_x * offset_x * components]);
if (subpart_w < tex_w && subpart_h < tex_h)
glTexSubImage2D(GL_TEXTURE_2D, 0, subpart_w, subpart_h, 1, 1, format, GL_UNSIGNED_BYTE, &uc_rect[(((size_t)subpart_y) * offset_y + subpart_h - 1) * img_w * components + (subpart_x * offset_x + subpart_w - 1) * components]);
}
GPU_basic_shader_bind(GPU_SHADER_TEXTURE_2D | GPU_SHADER_USE_COLOR);
glBegin(GL_QUADS);
glTexCoord2f((float)(0 + offset_left) / tex_w, (float)(0 + offset_bot) / tex_h);
glVertex2f(rast_x + (float)offset_left * xzoom, rast_y + (float)offset_bot * yzoom);
glTexCoord2f((float)(subpart_w - offset_right) / tex_w, (float)(0 + offset_bot) / tex_h);
glVertex2f(rast_x + (float)(subpart_w - offset_right) * xzoom * scaleX, rast_y + (float)offset_bot * yzoom);
glTexCoord2f((float)(subpart_w - offset_right) / tex_w, (float)(subpart_h - offset_top) / tex_h);
glVertex2f(rast_x + (float)(subpart_w - offset_right) * xzoom * scaleX, rast_y + (float)(subpart_h - offset_top) * yzoom * scaleY);
glTexCoord2f((float)(0 + offset_left) / tex_w, (float)(subpart_h - offset_top) / tex_h);
glVertex2f(rast_x + (float)offset_left * xzoom, rast_y + (float)(subpart_h - offset_top) * yzoom * scaleY);
glEnd();
GPU_basic_shader_bind(GPU_SHADER_USE_COLOR);
}
}
glBindTexture(GL_TEXTURE_2D, 0);
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
#if defined(__APPLE__) && 0
/* workaround for os x 10.5/10.6 driver bug (above) */
glPixelZoom(xzoom, yzoom);
#endif
}
void glaDrawPixelsTex(float x, float y, int img_w, int img_h, int format, int type, int zoomfilter, void *rect)
{
glaDrawPixelsTexScaled(x, y, img_w, img_h, format, type, zoomfilter, rect, 1.0f, 1.0f);
}
void glaDrawPixelsSafe(float x, float y, int img_w, int img_h, int row_w, int format, int type, void *rect)
{
float xzoom = glaGetOneFloat(GL_ZOOM_X);
float yzoom = glaGetOneFloat(GL_ZOOM_Y);
/* The pixel space coordinate of the intersection of
* the [zoomed] image with the origin.
*/
float ix = -x / xzoom;
float iy = -y / yzoom;
/* The maximum pixel amounts the image can be cropped
* at the lower left without exceeding the origin.
*/
int off_x = floor(max_ff(ix, 0.0f));
int off_y = floor(max_ff(iy, 0.0f));
/* The zoomed space coordinate of the raster position
* (starting at the lower left most unclipped pixel).
*/
float rast_x = x + off_x * xzoom;
float rast_y = y + off_y * yzoom;
GLfloat scissor[4];
int draw_w, draw_h;
/* Determine the smallest number of pixels we need to draw
* before the image would go off the upper right corner.
*
* It may seem this is just an optimization but some graphics
* cards (ATI) freak out if there is a large zoom factor and
* a large number of pixels off the screen (probably at some
* level the number of image pixels to draw is getting multiplied
* by the zoom and then clamped). Making sure we draw the
* fewest pixels possible keeps everyone mostly happy (still
* fails if we zoom in on one really huge pixel so that it
* covers the entire screen).
*/
glGetFloatv(GL_SCISSOR_BOX, scissor);
draw_w = min_ii(img_w - off_x, ceil((scissor[2] - rast_x) / xzoom));
draw_h = min_ii(img_h - off_y, ceil((scissor[3] - rast_y) / yzoom));
if (draw_w > 0 && draw_h > 0) {
/* Don't use safe RasterPos (slower) if we can avoid it. */
if (rast_x >= 0 && rast_y >= 0) {
glRasterPos2f(rast_x, rast_y);
}
else {
glaRasterPosSafe2f(rast_x, rast_y, 0, 0);
}
glPixelStorei(GL_UNPACK_ROW_LENGTH, row_w);
if (format == GL_LUMINANCE || format == GL_RED) {
if (type == GL_FLOAT) {
const float *f_rect = (float *)rect;
glDrawPixels(draw_w, draw_h, format, type, f_rect + (off_y * row_w + off_x));
}
else if (type == GL_INT || type == GL_UNSIGNED_INT) {
const int *i_rect = (int *)rect;
glDrawPixels(draw_w, draw_h, format, type, i_rect + (off_y * row_w + off_x));
}
}
else { /* RGBA */
if (type == GL_FLOAT) {
const float *f_rect = (float *)rect;
glDrawPixels(draw_w, draw_h, format, type, f_rect + (off_y * row_w + off_x) * 4);
}
else if (type == GL_UNSIGNED_BYTE) {
unsigned char *uc_rect = (unsigned char *) rect;
glDrawPixels(draw_w, draw_h, format, type, uc_rect + (off_y * row_w + off_x) * 4);
}
}
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
}
}
/* uses either DrawPixelsSafe or DrawPixelsTex, based on user defined maximum */
void glaDrawPixelsAuto(float x, float y, int img_w, int img_h, int format, int type, int zoomfilter, void *rect)
{
if (U.image_draw_method != IMAGE_DRAW_METHOD_DRAWPIXELS) {
glColor4f(1.0, 1.0, 1.0, 1.0);
glaDrawPixelsTex(x, y, img_w, img_h, format, type, zoomfilter, rect);
}
else {
glaDrawPixelsSafe(x, y, img_w, img_h, img_w, format, type, rect);
}
}
/* 2D Drawing Assistance */
void glaDefine2DArea(rcti *screen_rect)
{
const int sc_w = BLI_rcti_size_x(screen_rect) + 1;
const int sc_h = BLI_rcti_size_y(screen_rect) + 1;
glViewport(screen_rect->xmin, screen_rect->ymin, sc_w, sc_h);
glScissor(screen_rect->xmin, screen_rect->ymin, sc_w, sc_h);
/* The GLA_PIXEL_OFS magic number is to shift the matrix so that
* both raster and vertex integer coordinates fall at pixel
* centers properly. For a longer discussion see the OpenGL
* Programming Guide, Appendix H, Correctness Tips.
*/
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0.0, sc_w, 0.0, sc_h, -1, 1);
glTranslatef(GLA_PIXEL_OFS, GLA_PIXEL_OFS, 0.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
#if 0 /* UNUSED */
struct gla2DDrawInfo {
int orig_vp[4], orig_sc[4];
float orig_projmat[16], orig_viewmat[16];
rcti screen_rect;
rctf world_rect;
float wo_to_sc[2];
};
void gla2DGetMap(gla2DDrawInfo *di, rctf *rect)
{
*rect = di->world_rect;
}
void gla2DSetMap(gla2DDrawInfo *di, rctf *rect)
{
int sc_w, sc_h;
float wo_w, wo_h;
di->world_rect = *rect;
sc_w = BLI_rcti_size_x(&di->screen_rect);
sc_h = BLI_rcti_size_y(&di->screen_rect);
wo_w = BLI_rcti_size_x(&di->world_rect);
wo_h = BLI_rcti_size_y(&di->world_rect);
di->wo_to_sc[0] = sc_w / wo_w;
di->wo_to_sc[1] = sc_h / wo_h;
}
/** Save the current OpenGL state and initialize OpenGL for 2D
* rendering. glaEnd2DDraw should be called on the returned structure
* to free it and to return OpenGL to its previous state. The
* scissor rectangle is set to match the viewport.
*
* See glaDefine2DArea for an explanation of why this function uses integers.
*
* \param screen_rect The screen rectangle to be used for 2D drawing.
* \param world_rect The world rectangle that the 2D area represented
* by \a screen_rect is supposed to represent. If NULL it is assumed the
* world has a 1 to 1 mapping to the screen.
*/
gla2DDrawInfo *glaBegin2DDraw(rcti *screen_rect, rctf *world_rect)
{
gla2DDrawInfo *di = MEM_mallocN(sizeof(*di), "gla2DDrawInfo");
int sc_w, sc_h;
float wo_w, wo_h;
glGetIntegerv(GL_VIEWPORT, (GLint *)di->orig_vp);
glGetIntegerv(GL_SCISSOR_BOX, (GLint *)di->orig_sc);
glGetFloatv(GL_PROJECTION_MATRIX, (GLfloat *)di->orig_projmat);
glGetFloatv(GL_MODELVIEW_MATRIX, (GLfloat *)di->orig_viewmat);
di->screen_rect = *screen_rect;
if (world_rect) {
di->world_rect = *world_rect;
}
else {
di->world_rect.xmin = di->screen_rect.xmin;
di->world_rect.ymin = di->screen_rect.ymin;
di->world_rect.xmax = di->screen_rect.xmax;
di->world_rect.ymax = di->screen_rect.ymax;
}
sc_w = BLI_rcti_size_x(&di->screen_rect);
sc_h = BLI_rcti_size_y(&di->screen_rect);
wo_w = BLI_rcti_size_x(&di->world_rect);
wo_h = BLI_rcti_size_y(&di->world_rect);
di->wo_to_sc[0] = sc_w / wo_w;
di->wo_to_sc[1] = sc_h / wo_h;
glaDefine2DArea(&di->screen_rect);
return di;
}
/**
* Translate the (\a wo_x, \a wo_y) point from world coordinates into screen space.
*/
void gla2DDrawTranslatePt(gla2DDrawInfo *di, float wo_x, float wo_y, int *r_sc_x, int *r_sc_y)
{
*r_sc_x = (wo_x - di->world_rect.xmin) * di->wo_to_sc[0];
*r_sc_y = (wo_y - di->world_rect.ymin) * di->wo_to_sc[1];
}
/**
* Translate the \a world point from world coordinates into screen space.
*/
void gla2DDrawTranslatePtv(gla2DDrawInfo *di, float world[2], int r_screen[2])
{
screen_r[0] = (world[0] - di->world_rect.xmin) * di->wo_to_sc[0];
screen_r[1] = (world[1] - di->world_rect.ymin) * di->wo_to_sc[1];
}
/**
* Restores the previous OpenGL state and frees the auxiliary gla data.
*/
void glaEnd2DDraw(gla2DDrawInfo *di)
{
glViewport(di->orig_vp[0], di->orig_vp[1], di->orig_vp[2], di->orig_vp[3]);
glScissor(di->orig_vp[0], di->orig_vp[1], di->orig_vp[2], di->orig_vp[3]);
glMatrixMode(GL_PROJECTION);
glLoadMatrixf(di->orig_projmat);
glMatrixMode(GL_MODELVIEW);
glLoadMatrixf(di->orig_viewmat);
MEM_freeN(di);
}
#endif
/* **************** GL_POINT hack ************************ */
static int curmode = 0;
static int pointhack = 0;
static GLubyte Squaredot[16] = {0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff};
void bglBegin(int mode)
{
curmode = mode;
if (mode == GL_POINTS) {
float value[4];
glGetFloatv(GL_POINT_SIZE_RANGE, value);
if (value[1] < 2.0f) {
glGetFloatv(GL_POINT_SIZE, value);
pointhack = iroundf(value[0]);
if (pointhack > 4) pointhack = 4;
}
else {
glBegin(mode);
}
}
}
#if 0 /* UNUSED */
int bglPointHack(void)
{
float value[4];
int pointhack_px;
glGetFloatv(GL_POINT_SIZE_RANGE, value);
if (value[1] < 2.0f) {
glGetFloatv(GL_POINT_SIZE, value);
pointhack_px = floorf(value[0] + 0.5f);
if (pointhack_px > 4) pointhack_px = 4;
return pointhack_px;
}
return 0;
}
#endif
void bglVertex3fv(const float vec[3])
{
switch (curmode) {
case GL_POINTS:
if (pointhack) {
glRasterPos3fv(vec);
glBitmap(pointhack, pointhack, (float)pointhack / 2.0f, (float)pointhack / 2.0f, 0.0, 0.0, Squaredot);
}
else {
glVertex3fv(vec);
}
break;
}
}
void bglVertex3f(float x, float y, float z)
{
switch (curmode) {
case GL_POINTS:
if (pointhack) {
glRasterPos3f(x, y, z);
glBitmap(pointhack, pointhack, (float)pointhack / 2.0f, (float)pointhack / 2.0f, 0.0, 0.0, Squaredot);
}
else {
glVertex3f(x, y, z);
}
break;
}
}
void bglVertex2fv(const float vec[2])
{
switch (curmode) {
case GL_POINTS:
if (pointhack) {
glRasterPos2fv(vec);
glBitmap(pointhack, pointhack, (float)pointhack / 2, pointhack / 2, 0.0, 0.0, Squaredot);
}
else {
glVertex2fv(vec);
}
break;
}
}
void bglEnd(void)
{
if (pointhack) pointhack = 0;
else glEnd();
}
/* Uses current OpenGL state to get view matrices for gluProject/gluUnProject */
void bgl_get_mats(bglMats *mats)
{
const double badvalue = 1.0e-6;
glGetDoublev(GL_MODELVIEW_MATRIX, mats->modelview);
glGetDoublev(GL_PROJECTION_MATRIX, mats->projection);
glGetIntegerv(GL_VIEWPORT, (GLint *)mats->viewport);
/* Very strange code here - it seems that certain bad values in the
* modelview matrix can cause gluUnProject to give bad results. */
if (mats->modelview[0] < badvalue &&
mats->modelview[0] > -badvalue)
{
mats->modelview[0] = 0;
}
if (mats->modelview[5] < badvalue &&
mats->modelview[5] > -badvalue)
{
mats->modelview[5] = 0;
}
/* Set up viewport so that gluUnProject will give correct values */
mats->viewport[0] = 0;
mats->viewport[1] = 0;
}
/* *************** glPolygonOffset hack ************* */
/**
* \note \a viewdist is only for ortho at the moment.
*/
void bglPolygonOffset(float viewdist, float dist)
{
static float winmat[16], offset = 0.0;
if (dist != 0.0f) {
float offs;
// glEnable(GL_POLYGON_OFFSET_FILL);
// glPolygonOffset(-1.0, -1.0);
/* hack below is to mimic polygon offset */
glMatrixMode(GL_PROJECTION);
glGetFloatv(GL_PROJECTION_MATRIX, (float *)winmat);
/* dist is from camera to center point */
if (winmat[15] > 0.5f) {
#if 1
offs = 0.00001f * dist * viewdist; // ortho tweaking
#else
static float depth_fac = 0.0f;
if (depth_fac == 0.0f) {
int depthbits;
glGetIntegerv(GL_DEPTH_BITS, &depthbits);
depth_fac = 1.0f / (float)((1 << depthbits) - 1);
}
offs = (-1.0 / winmat[10]) * dist * depth_fac;
UNUSED_VARS(viewdist);
#endif
}
else {
/* should be clipping value or so... */
offs = 0.0005f * dist;
}
winmat[14] -= offs;
offset += offs;
glLoadMatrixf(winmat);
glMatrixMode(GL_MODELVIEW);
}
else {
glMatrixMode(GL_PROJECTION);
winmat[14] += offset;
offset = 0.0;
glLoadMatrixf(winmat);
glMatrixMode(GL_MODELVIEW);
}
}
#if 0 /* UNUSED */
void bglFlush(void)
{
glFlush();
#ifdef __APPLE__
// if (GPU_type_matches(GPU_DEVICE_INTEL, GPU_OS_MAC, GPU_DRIVER_OFFICIAL))
// XXX myswapbuffers(); //hack to get mac intel graphics to show frontbuffer
#endif
}
#endif
/* **** Color management helper functions for GLSL display/transform ***** */
/* Draw given image buffer on a screen using GLSL for display transform */
void glaDrawImBuf_glsl(ImBuf *ibuf, float x, float y, int zoomfilter,
ColorManagedViewSettings *view_settings,
ColorManagedDisplaySettings *display_settings)
{
bool force_fallback = false;
bool need_fallback = true;
/* Early out */
if (ibuf->rect == NULL && ibuf->rect_float == NULL)
return;
/* Single channel images could not be transformed using GLSL yet */
force_fallback |= ibuf->channels == 1;
/* If user decided not to use GLSL, fallback to glaDrawPixelsAuto */
force_fallback |= (U.image_draw_method != IMAGE_DRAW_METHOD_GLSL);
/* Try to draw buffer using GLSL display transform */
if (force_fallback == false) {
int ok;
if (ibuf->rect_float) {
if (ibuf->float_colorspace) {
ok = IMB_colormanagement_setup_glsl_draw_from_space(view_settings, display_settings,
ibuf->float_colorspace,
ibuf->dither, true);
}
else {
ok = IMB_colormanagement_setup_glsl_draw(view_settings, display_settings,
ibuf->dither, true);
}
}
else {
ok = IMB_colormanagement_setup_glsl_draw_from_space(view_settings, display_settings,
ibuf->rect_colorspace,
ibuf->dither, false);
}
if (ok) {
glColor4f(1.0, 1.0, 1.0, 1.0);
if (ibuf->rect_float) {
int format = 0;
if (ibuf->channels == 3)
format = GL_RGB;
else if (ibuf->channels == 4)
format = GL_RGBA;
else
BLI_assert(!"Incompatible number of channels for GLSL display");
if (format != 0) {
glaDrawPixelsTex(x, y, ibuf->x, ibuf->y, format, GL_FLOAT,
zoomfilter, ibuf->rect_float);
}
}
else if (ibuf->rect) {
/* ibuf->rect is always RGBA */
glaDrawPixelsTex(x, y, ibuf->x, ibuf->y, GL_RGBA, GL_UNSIGNED_BYTE,
zoomfilter, ibuf->rect);
}
IMB_colormanagement_finish_glsl_draw();
need_fallback = false;
}
}
/* In case GLSL failed or not usable, fallback to glaDrawPixelsAuto */
if (need_fallback) {
unsigned char *display_buffer;
void *cache_handle;
display_buffer = IMB_display_buffer_acquire(ibuf, view_settings, display_settings, &cache_handle);
if (display_buffer)
glaDrawPixelsAuto(x, y, ibuf->x, ibuf->y, GL_RGBA, GL_UNSIGNED_BYTE,
zoomfilter, display_buffer);
IMB_display_buffer_release(cache_handle);
}
}
void glaDrawImBuf_glsl_ctx(const bContext *C, ImBuf *ibuf, float x, float y, int zoomfilter)
{
ColorManagedViewSettings *view_settings;
ColorManagedDisplaySettings *display_settings;
IMB_colormanagement_display_settings_from_ctx(C, &view_settings, &display_settings);
glaDrawImBuf_glsl(ibuf, x, y, zoomfilter, view_settings, display_settings);
}
void cpack(unsigned int x)
{
glColor3ub(( (x) & 0xFF),
(((x) >> 8) & 0xFF),
(((x) >> 16) & 0xFF));
}
void glaDrawBorderCorners(const rcti *border, float zoomx, float zoomy)
{
float delta_x = 4.0f * UI_DPI_FAC / zoomx;
float delta_y = 4.0f * UI_DPI_FAC / zoomy;
delta_x = min_ff(delta_x, border->xmax - border->xmin);
delta_y = min_ff(delta_y, border->ymax - border->ymin);
/* left bottom corner */
glBegin(GL_LINE_STRIP);
glVertex2f(border->xmin, border->ymin + delta_y);
glVertex2f(border->xmin, border->ymin);
glVertex2f(border->xmin + delta_x, border->ymin);
glEnd();
/* left top corner */
glBegin(GL_LINE_STRIP);
glVertex2f(border->xmin, border->ymax - delta_y);
glVertex2f(border->xmin, border->ymax);
glVertex2f(border->xmin + delta_x, border->ymax);
glEnd();
/* right bottom corner */
glBegin(GL_LINE_STRIP);
glVertex2f(border->xmax - delta_x, border->ymin);
glVertex2f(border->xmax, border->ymin);
glVertex2f(border->xmax, border->ymin + delta_y);
glEnd();
/* right top corner */
glBegin(GL_LINE_STRIP);
glVertex2f(border->xmax - delta_x, border->ymax);
glVertex2f(border->xmax, border->ymax);
glVertex2f(border->xmax, border->ymax - delta_y);
glEnd();
}
|