1 /* $Id: logic.c,v 1.7 1997/07/24 01:24:11 brianp Exp $ */
2
3 /*
4 * Mesa 3-D graphics library
5 * Version: 2.4
6 * Copyright (C) 1995-1997 Brian Paul
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
17 *
18 * You should have received a copy of the GNU Library General Public
19 * License along with this library; if not, write to the Free
20 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 */
22
23
24 /*
25 * $Log: logic.c,v $
26 * Revision 1.7 1997/07/24 01:24:11 brianp
27 * changed precompiled header symbol from PCH to PC_HEADER
28 *
29 * Revision 1.6 1997/05/28 03:25:26 brianp
30 * added precompiled header (PCH) support
31 *
32 * Revision 1.5 1997/04/20 20:28:49 brianp
33 * replaced abort() with gl_problem()
34 *
35 * Revision 1.4 1997/03/04 18:56:57 brianp
36 * added #include <stdlib.h> for abort()
37 *
38 * Revision 1.3 1997/01/28 22:16:31 brianp
39 * added gl_logicop_rgba_span() and gl_logicop_rgba_pixels()
40 *
41 * Revision 1.2 1997/01/04 00:13:11 brianp
42 * was using ! instead of ~ to invert pixel bits (ugh!)
43 *
44 * Revision 1.1 1996/09/13 01:38:16 brianp
45 * Initial revision
46 *
47 */
48
49
50 #ifdef PC_HEADER
51 #include "all.h"
52 #else
53 #include <stdlib.h>
54 #include "alphabuf.h"
55 #include "context.h"
56 #include "dlist.h"
57 #include "logic.h"
58 #include "macros.h"
59 #include "pb.h"
60 #include "span.h"
61 #include "types.h"
62 #endif
63
64
65
gl_LogicOp(GLcontext * ctx,GLenum opcode)66 void gl_LogicOp( GLcontext *ctx, GLenum opcode )
67 {
68 if (INSIDE_BEGIN_END(ctx)) {
69 gl_error( ctx, GL_INVALID_OPERATION, "glLogicOp" );
70 return;
71 }
72 switch (opcode) {
73 case GL_CLEAR:
74 case GL_SET:
75 case GL_COPY:
76 case GL_COPY_INVERTED:
77 case GL_NOOP:
78 case GL_INVERT:
79 case GL_AND:
80 case GL_NAND:
81 case GL_OR:
82 case GL_NOR:
83 case GL_XOR:
84 case GL_EQUIV:
85 case GL_AND_REVERSE:
86 case GL_AND_INVERTED:
87 case GL_OR_REVERSE:
88 case GL_OR_INVERTED:
89 ctx->Color.LogicOp = opcode;
90 ctx->NewState |= NEW_RASTER_OPS;
91 return;
92 default:
93 gl_error( ctx, GL_INVALID_ENUM, "glLogicOp" );
94 return;
95 }
96 }
97
98
99
100
101 /*
102 * Apply the current logic operator to a span of CI pixels. This is only
103 * used if the device driver can't do logic ops.
104 */
gl_logicop_ci_span(GLcontext * ctx,GLuint n,GLint x,GLint y,GLuint index[],GLubyte mask[])105 void gl_logicop_ci_span( GLcontext *ctx, GLuint n, GLint x, GLint y,
106 GLuint index[], GLubyte mask[] )
107 {
108 GLuint dest[MAX_WIDTH];
109 GLuint i;
110
111 /* Read dest values from frame buffer */
112 (*ctx->Driver.ReadIndexSpan)( ctx, n, x, y, dest );
113
114 switch (ctx->Color.LogicOp) {
115 case GL_CLEAR:
116 for (i=0;i<n;i++) {
117 if (mask[i]) {
118 index[i] = 0;
119 }
120 }
121 break;
122 case GL_SET:
123 for (i=0;i<n;i++) {
124 if (mask[i]) {
125 index[i] = 1;
126 }
127 }
128 break;
129 case GL_COPY:
130 /* do nothing */
131 break;
132 case GL_COPY_INVERTED:
133 for (i=0;i<n;i++) {
134 if (mask[i]) {
135 index[i] = ~index[i];
136 }
137 }
138 break;
139 case GL_NOOP:
140 for (i=0;i<n;i++) {
141 if (mask[i]) {
142 index[i] = dest[i];
143 }
144 }
145 break;
146 case GL_INVERT:
147 for (i=0;i<n;i++) {
148 if (mask[i]) {
149 index[i] = ~dest[i];
150 }
151 }
152 break;
153 case GL_AND:
154 for (i=0;i<n;i++) {
155 if (mask[i]) {
156 index[i] &= dest[i];
157 }
158 }
159 break;
160 case GL_NAND:
161 for (i=0;i<n;i++) {
162 if (mask[i]) {
163 index[i] = ~(index[i] & dest[i]);
164 }
165 }
166 break;
167 case GL_OR:
168 for (i=0;i<n;i++) {
169 if (mask[i]) {
170 index[i] |= dest[i];
171 }
172 }
173 break;
174 case GL_NOR:
175 for (i=0;i<n;i++) {
176 if (mask[i]) {
177 index[i] = ~(index[i] | dest[i]);
178 }
179 }
180 break;
181 case GL_XOR:
182 for (i=0;i<n;i++) {
183 if (mask[i]) {
184 index[i] ^= dest[i];
185 }
186 }
187 break;
188 case GL_EQUIV:
189 for (i=0;i<n;i++) {
190 if (mask[i]) {
191 index[i] = ~(index[i] ^ dest[i]);
192 }
193 }
194 break;
195 case GL_AND_REVERSE:
196 for (i=0;i<n;i++) {
197 if (mask[i]) {
198 index[i] = index[i] & ~dest[i];
199 }
200 }
201 break;
202 case GL_AND_INVERTED:
203 for (i=0;i<n;i++) {
204 if (mask[i]) {
205 index[i] = ~index[i] & dest[i];
206 }
207 }
208 break;
209 case GL_OR_REVERSE:
210 for (i=0;i<n;i++) {
211 if (mask[i]) {
212 index[i] = index[i] | ~dest[i];
213 }
214 }
215 break;
216 case GL_OR_INVERTED:
217 for (i=0;i<n;i++) {
218 if (mask[i]) {
219 index[i] = ~index[i] | dest[i];
220 }
221 }
222 break;
223 default:
224 gl_error( ctx, GL_INVALID_ENUM, "gl_logic error" );
225 }
226 }
227
228
229
230 /*
231 * Apply the current logic operator to an array of CI pixels. This is only
232 * used if the device driver can't do logic ops.
233 */
gl_logicop_ci_pixels(GLcontext * ctx,GLuint n,const GLint x[],const GLint y[],GLuint index[],GLubyte mask[])234 void gl_logicop_ci_pixels( GLcontext *ctx,
235 GLuint n, const GLint x[], const GLint y[],
236 GLuint index[], GLubyte mask[] )
237 {
238 GLuint dest[PB_SIZE];
239 GLuint i;
240
241 /* Read dest values from frame buffer */
242 (*ctx->Driver.ReadIndexPixels)( ctx, n, x, y, dest, mask );
243
244 switch (ctx->Color.LogicOp) {
245 case GL_CLEAR:
246 for (i=0;i<n;i++) {
247 if (mask[i]) {
248 index[i] = 0;
249 }
250 }
251 break;
252 case GL_SET:
253 for (i=0;i<n;i++) {
254 if (mask[i]) {
255 index[i] = 1;
256 }
257 }
258 break;
259 case GL_COPY:
260 /* do nothing */
261 break;
262 case GL_COPY_INVERTED:
263 for (i=0;i<n;i++) {
264 if (mask[i]) {
265 index[i] = ~index[i];
266 }
267 }
268 break;
269 case GL_NOOP:
270 for (i=0;i<n;i++) {
271 if (mask[i]) {
272 index[i] = dest[i];
273 }
274 }
275 break;
276 case GL_INVERT:
277 for (i=0;i<n;i++) {
278 if (mask[i]) {
279 index[i] = ~dest[i];
280 }
281 }
282 break;
283 case GL_AND:
284 for (i=0;i<n;i++) {
285 if (mask[i]) {
286 index[i] &= dest[i];
287 }
288 }
289 break;
290 case GL_NAND:
291 for (i=0;i<n;i++) {
292 if (mask[i]) {
293 index[i] = ~(index[i] & dest[i]);
294 }
295 }
296 break;
297 case GL_OR:
298 for (i=0;i<n;i++) {
299 if (mask[i]) {
300 index[i] |= dest[i];
301 }
302 }
303 break;
304 case GL_NOR:
305 for (i=0;i<n;i++) {
306 if (mask[i]) {
307 index[i] = ~(index[i] | dest[i]);
308 }
309 }
310 break;
311 case GL_XOR:
312 for (i=0;i<n;i++) {
313 if (mask[i]) {
314 index[i] ^= dest[i];
315 }
316 }
317 break;
318 case GL_EQUIV:
319 for (i=0;i<n;i++) {
320 if (mask[i]) {
321 index[i] = ~(index[i] ^ dest[i]);
322 }
323 }
324 break;
325 case GL_AND_REVERSE:
326 for (i=0;i<n;i++) {
327 if (mask[i]) {
328 index[i] = index[i] & ~dest[i];
329 }
330 }
331 break;
332 case GL_AND_INVERTED:
333 for (i=0;i<n;i++) {
334 if (mask[i]) {
335 index[i] = ~index[i] & dest[i];
336 }
337 }
338 break;
339 case GL_OR_REVERSE:
340 for (i=0;i<n;i++) {
341 if (mask[i]) {
342 index[i] = index[i] | ~dest[i];
343 }
344 }
345 break;
346 case GL_OR_INVERTED:
347 for (i=0;i<n;i++) {
348 if (mask[i]) {
349 index[i] = ~index[i] | dest[i];
350 }
351 }
352 break;
353 default:
354 gl_error( ctx, GL_INVALID_ENUM, "gl_logic_pixels error" );
355 }
356 }
357
358
359
360 /*
361 * Apply the current logic operator to a span of RGBA pixels. This is only
362 * used if the device driver can't do logic ops.
363 */
gl_logicop_rgba_span(GLcontext * ctx,GLuint n,GLint x,GLint y,GLubyte red[],GLubyte green[],GLubyte blue[],GLubyte alpha[],GLubyte mask[])364 void gl_logicop_rgba_span( GLcontext *ctx,
365 GLuint n, GLint x, GLint y,
366 GLubyte red[], GLubyte green[],
367 GLubyte blue[], GLubyte alpha[],
368 GLubyte mask[] )
369 {
370 GLubyte rdest[MAX_WIDTH], gdest[MAX_WIDTH];
371 GLubyte bdest[MAX_WIDTH], adest[MAX_WIDTH];
372 GLuint i;
373
374 /* Read span of current frame buffer pixels */
375 gl_read_color_span( ctx, n, x, y, rdest, gdest, bdest, adest );
376
377 /* apply logic op */
378 switch (ctx->Color.LogicOp) {
379 case GL_CLEAR:
380 for (i=0;i<n;i++) {
381 if (mask[i]) {
382 red[i] = green[i] = blue[i] = alpha[i] = 0;
383 }
384 }
385 break;
386 case GL_SET:
387 {
388 GLubyte r = (GLint) ctx->Visual->RedScale;
389 GLubyte g = (GLint) ctx->Visual->GreenScale;
390 GLubyte b = (GLint) ctx->Visual->BlueScale;
391 GLubyte a = (GLint) ctx->Visual->AlphaScale;
392 for (i=0;i<n;i++) {
393 if (mask[i]) {
394 red[i] = r;
395 green[i] = g;
396 blue[i] = b;
397 alpha[i] = a;
398 }
399 }
400 }
401 break;
402 case GL_COPY:
403 /* do nothing */
404 break;
405 case GL_COPY_INVERTED:
406 for (i=0;i<n;i++) {
407 if (mask[i]) {
408 red[i] = ~red[i];
409 green[i] = ~green[i];
410 blue[i] = ~blue[i];
411 alpha[i] = ~alpha[i];
412 }
413 }
414 break;
415 case GL_NOOP:
416 for (i=0;i<n;i++) {
417 if (mask[i]) {
418 red[i] = rdest[i];
419 green[i] = gdest[i];
420 blue[i] = bdest[i];
421 alpha[i] = adest[i];
422 }
423 }
424 break;
425 case GL_INVERT:
426 for (i=0;i<n;i++) {
427 if (mask[i]) {
428 red[i] = ~rdest[i];
429 green[i] = ~gdest[i];
430 blue[i] = ~bdest[i];
431 alpha[i] = ~adest[i];
432 }
433 }
434 break;
435 case GL_AND:
436 for (i=0;i<n;i++) {
437 if (mask[i]) {
438 red[i] &= rdest[i];
439 green[i] &= gdest[i];
440 blue[i] &= bdest[i];
441 alpha[i] &= adest[i];
442 }
443 }
444 break;
445 case GL_NAND:
446 for (i=0;i<n;i++) {
447 if (mask[i]) {
448 red[i] = ~(red[i] & rdest[i]);
449 green[i] = ~(green[i] & gdest[i]);
450 blue[i] = ~(blue[i] & bdest[i]);
451 alpha[i] = ~(alpha[i] & adest[i]);
452 }
453 }
454 break;
455 case GL_OR:
456 for (i=0;i<n;i++) {
457 if (mask[i]) {
458 red[i] |= rdest[i];
459 green[i] |= gdest[i];
460 blue[i] |= bdest[i];
461 alpha[i] |= adest[i];
462 }
463 }
464 break;
465 case GL_NOR:
466 for (i=0;i<n;i++) {
467 if (mask[i]) {
468 red[i] = ~(red[i] | rdest[i]);
469 green[i] = ~(green[i] | gdest[i]);
470 blue[i] = ~(blue[i] | bdest[i]);
471 alpha[i] = ~(alpha[i] | adest[i]);
472 }
473 }
474 break;
475 case GL_XOR:
476 for (i=0;i<n;i++) {
477 if (mask[i]) {
478 red[i] ^= rdest[i];
479 green[i] ^= gdest[i];
480 blue[i] ^= bdest[i];
481 alpha[i] ^= adest[i];
482 }
483 }
484 break;
485 case GL_EQUIV:
486 for (i=0;i<n;i++) {
487 if (mask[i]) {
488 red[i] = ~(red[i] ^ rdest[i]);
489 green[i] = ~(green[i] ^ gdest[i]);
490 blue[i] = ~(blue[i] ^ bdest[i]);
491 alpha[i] = ~(alpha[i] ^ adest[i]);
492 }
493 }
494 break;
495 case GL_AND_REVERSE:
496 for (i=0;i<n;i++) {
497 if (mask[i]) {
498 red[i] = red[i] & ~rdest[i];
499 green[i] = green[i] & ~gdest[i];
500 blue[i] = blue[i] & ~bdest[i];
501 alpha[i] = alpha[i] & ~adest[i];
502 }
503 }
504 break;
505 case GL_AND_INVERTED:
506 for (i=0;i<n;i++) {
507 if (mask[i]) {
508 red[i] = ~red[i] & rdest[i];
509 green[i] = ~green[i] & gdest[i];
510 blue[i] = ~blue[i] & bdest[i];
511 alpha[i] = ~alpha[i] & adest[i];
512 }
513 }
514 break;
515 case GL_OR_REVERSE:
516 for (i=0;i<n;i++) {
517 if (mask[i]) {
518 red[i] = red[i] | ~rdest[i];
519 green[i] = green[i] | ~gdest[i];
520 blue[i] = blue[i] | ~bdest[i];
521 alpha[i] = alpha[i] | ~adest[i];
522 }
523 }
524 break;
525 case GL_OR_INVERTED:
526 for (i=0;i<n;i++) {
527 if (mask[i]) {
528 red[i] = ~red[i] | rdest[i];
529 green[i] = ~green[i] | gdest[i];
530 blue[i] = ~blue[i] | bdest[i];
531 alpha[i] = ~alpha[i] | adest[i];
532 }
533 }
534 break;
535 default:
536 /* should never happen */
537 gl_problem(ctx, "Bad function in gl_logicop_rgba_span");
538 return;
539 }
540 }
541
542
543
544 /*
545 * Apply the current logic operator to an array of RGBA pixels. This is only
546 * used if the device driver can't do logic ops.
547 */
gl_logicop_rgba_pixels(GLcontext * ctx,GLuint n,const GLint x[],const GLint y[],GLubyte red[],GLubyte green[],GLubyte blue[],GLubyte alpha[],GLubyte mask[])548 void gl_logicop_rgba_pixels( GLcontext *ctx,
549 GLuint n, const GLint x[], const GLint y[],
550 GLubyte red[], GLubyte green[],
551 GLubyte blue[], GLubyte alpha[],
552 GLubyte mask[] )
553 {
554 GLubyte rdest[PB_SIZE], gdest[PB_SIZE], bdest[PB_SIZE], adest[PB_SIZE];
555 GLuint i;
556
557 /* Read pixels from current color buffer */
558 (*ctx->Driver.ReadColorPixels)( ctx, n, x, y, rdest, gdest, bdest, adest, mask );
559 if (ctx->RasterMask & ALPHABUF_BIT) {
560 gl_read_alpha_pixels( ctx, n, x, y, adest, mask );
561 }
562
563 /* apply logic op */
564 switch (ctx->Color.LogicOp) {
565 case GL_CLEAR:
566 for (i=0;i<n;i++) {
567 if (mask[i]) {
568 red[i] = green[i] = blue[i] = alpha[i] = 0;
569 }
570 }
571 break;
572 case GL_SET:
573 {
574 GLubyte r = (GLint) ctx->Visual->RedScale;
575 GLubyte g = (GLint) ctx->Visual->GreenScale;
576 GLubyte b = (GLint) ctx->Visual->BlueScale;
577 GLubyte a = (GLint) ctx->Visual->AlphaScale;
578 for (i=0;i<n;i++) {
579 if (mask[i]) {
580 red[i] = r;
581 green[i] = g;
582 blue[i] = b;
583 alpha[i] = a;
584 }
585 }
586 }
587 break;
588 case GL_COPY:
589 /* do nothing */
590 break;
591 case GL_COPY_INVERTED:
592 for (i=0;i<n;i++) {
593 if (mask[i]) {
594 red[i] = ~red[i];
595 green[i] = ~green[i];
596 blue[i] = ~blue[i];
597 alpha[i] = ~alpha[i];
598 }
599 }
600 break;
601 case GL_NOOP:
602 for (i=0;i<n;i++) {
603 if (mask[i]) {
604 red[i] = rdest[i];
605 green[i] = gdest[i];
606 blue[i] = bdest[i];
607 alpha[i] = adest[i];
608 }
609 }
610 break;
611 case GL_INVERT:
612 for (i=0;i<n;i++) {
613 if (mask[i]) {
614 red[i] = ~rdest[i];
615 green[i] = ~gdest[i];
616 blue[i] = ~bdest[i];
617 alpha[i] = ~adest[i];
618 }
619 }
620 break;
621 case GL_AND:
622 for (i=0;i<n;i++) {
623 if (mask[i]) {
624 red[i] &= rdest[i];
625 green[i] &= gdest[i];
626 blue[i] &= bdest[i];
627 alpha[i] &= adest[i];
628 }
629 }
630 break;
631 case GL_NAND:
632 for (i=0;i<n;i++) {
633 if (mask[i]) {
634 red[i] = ~(red[i] & rdest[i]);
635 green[i] = ~(green[i] & gdest[i]);
636 blue[i] = ~(blue[i] & bdest[i]);
637 alpha[i] = ~(alpha[i] & adest[i]);
638 }
639 }
640 break;
641 case GL_OR:
642 for (i=0;i<n;i++) {
643 if (mask[i]) {
644 red[i] |= rdest[i];
645 green[i] |= gdest[i];
646 blue[i] |= bdest[i];
647 alpha[i] |= adest[i];
648 }
649 }
650 break;
651 case GL_NOR:
652 for (i=0;i<n;i++) {
653 if (mask[i]) {
654 red[i] = ~(red[i] | rdest[i]);
655 green[i] = ~(green[i] | gdest[i]);
656 blue[i] = ~(blue[i] | bdest[i]);
657 alpha[i] = ~(alpha[i] | adest[i]);
658 }
659 }
660 break;
661 case GL_XOR:
662 for (i=0;i<n;i++) {
663 if (mask[i]) {
664 red[i] ^= rdest[i];
665 green[i] ^= gdest[i];
666 blue[i] ^= bdest[i];
667 alpha[i] ^= adest[i];
668 }
669 }
670 break;
671 case GL_EQUIV:
672 for (i=0;i<n;i++) {
673 if (mask[i]) {
674 red[i] = ~(red[i] ^ rdest[i]);
675 green[i] = ~(green[i] ^ gdest[i]);
676 blue[i] = ~(blue[i] ^ bdest[i]);
677 alpha[i] = ~(alpha[i] ^ adest[i]);
678 }
679 }
680 break;
681 case GL_AND_REVERSE:
682 for (i=0;i<n;i++) {
683 if (mask[i]) {
684 red[i] = red[i] & ~rdest[i];
685 green[i] = green[i] & ~gdest[i];
686 blue[i] = blue[i] & ~bdest[i];
687 alpha[i] = alpha[i] & ~adest[i];
688 }
689 }
690 break;
691 case GL_AND_INVERTED:
692 for (i=0;i<n;i++) {
693 if (mask[i]) {
694 red[i] = ~red[i] & rdest[i];
695 green[i] = ~green[i] & gdest[i];
696 blue[i] = ~blue[i] & bdest[i];
697 alpha[i] = ~alpha[i] & adest[i];
698 }
699 }
700 break;
701 case GL_OR_REVERSE:
702 for (i=0;i<n;i++) {
703 if (mask[i]) {
704 red[i] = red[i] | ~rdest[i];
705 green[i] = green[i] | ~gdest[i];
706 blue[i] = blue[i] | ~bdest[i];
707 alpha[i] = alpha[i] | ~adest[i];
708 }
709 }
710 break;
711 case GL_OR_INVERTED:
712 for (i=0;i<n;i++) {
713 if (mask[i]) {
714 red[i] = ~red[i] | rdest[i];
715 green[i] = ~green[i] | gdest[i];
716 blue[i] = ~blue[i] | bdest[i];
717 alpha[i] = ~alpha[i] | adest[i];
718 }
719 }
720 break;
721 default:
722 /* should never happen */
723 gl_problem(ctx, "Bad function in gl_logicop_rgba_pixels");
724 return;
725 }
726 }
727