source: trunk/src/opengl/mesa/pixel.c

Last change on this file was 3598, checked in by jeroen, 25 years ago

* empty log message *
File size: 26.8 KB
Line 
1/* $Id: pixel.c,v 1.3 2000-05-23 20:40:45 jeroen Exp $ */
2
3/*
4 * Mesa 3-D graphics library
5 * Version: 3.3
6 *
7 * Copyright (C) 1999 Brian Paul All Rights Reserved.
8 *
9 * Permission is hereby granted, free of charge, to any person obtaining a
10 * copy of this software and associated documentation files (the "Software"),
11 * to deal in the Software without restriction, including without limitation
12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
13 * and/or sell copies of the Software, and to permit persons to whom the
14 * Software is furnished to do so, subject to the following conditions:
15 *
16 * The above copyright notice and this permission notice shall be included
17 * in all copies or substantial portions of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
23 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
24 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 */
26
27
28
29
30
31/*
32 * glPixelStore, glPixelTransfer, glPixelMap, glPixelZoom, etc.
33 */
34
35
36#ifdef PC_HEADER
37#include "all.h"
38#else
39#include "glheader.h"
40#include "types.h"
41#include "context.h"
42#include "macros.h"
43#include "pixel.h"
44#include "mem.h"
45#endif
46
47
48
49/**********************************************************************/
50/***** glPixelZoom *****/
51/**********************************************************************/
52
53
54
55void
56_mesa_PixelZoom( GLfloat xfactor, GLfloat yfactor )
57{
58 GET_CURRENT_CONTEXT(ctx);
59 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPixelZoom");
60
61 ctx->Pixel.ZoomX = xfactor;
62 ctx->Pixel.ZoomY = yfactor;
63}
64
65
66
67/**********************************************************************/
68/***** glPixelStore *****/
69/**********************************************************************/
70
71
72void
73_mesa_PixelStorei( GLenum pname, GLint param )
74{
75 /* NOTE: this call can't be compiled into the display list */
76 GET_CURRENT_CONTEXT(ctx);
77 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPixelStore");
78
79 switch (pname) {
80 case GL_PACK_SWAP_BYTES:
81 ctx->Pack.SwapBytes = param ? GL_TRUE : GL_FALSE;
82 break;
83 case GL_PACK_LSB_FIRST:
84 ctx->Pack.LsbFirst = param ? GL_TRUE : GL_FALSE;
85 break;
86 case GL_PACK_ROW_LENGTH:
87 if (param<0) {
88 gl_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
89 }
90 else {
91 ctx->Pack.RowLength = param;
92 }
93 break;
94 case GL_PACK_IMAGE_HEIGHT:
95 if (param<0)
96 gl_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
97 else
98 ctx->Pack.ImageHeight = param;
99 break;
100 case GL_PACK_SKIP_PIXELS:
101 if (param<0) {
102 gl_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
103 }
104 else {
105 ctx->Pack.SkipPixels = param;
106 }
107 break;
108 case GL_PACK_SKIP_ROWS:
109 if (param<0) {
110 gl_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
111 }
112 else {
113 ctx->Pack.SkipRows = param;
114 }
115 break;
116 case GL_PACK_ALIGNMENT:
117 if (param==1 || param==2 || param==4 || param==8) {
118 ctx->Pack.Alignment = param;
119 }
120 else {
121 gl_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
122 }
123 break;
124 case GL_UNPACK_SWAP_BYTES:
125 ctx->Unpack.SwapBytes = param ? GL_TRUE : GL_FALSE;
126 break;
127 case GL_UNPACK_LSB_FIRST:
128 ctx->Unpack.LsbFirst = param ? GL_TRUE : GL_FALSE;
129 break;
130 case GL_UNPACK_ROW_LENGTH:
131 if (param<0) {
132 gl_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
133 }
134 else {
135 ctx->Unpack.RowLength = param;
136 }
137 break;
138 case GL_UNPACK_IMAGE_HEIGHT:
139 if (param<0)
140 gl_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
141 else
142 ctx->Unpack.ImageHeight = param;
143 break;
144 case GL_UNPACK_SKIP_PIXELS:
145 if (param<0) {
146 gl_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
147 }
148 else {
149 ctx->Unpack.SkipPixels = param;
150 }
151 break;
152 case GL_UNPACK_SKIP_ROWS:
153 if (param<0) {
154 gl_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
155 }
156 else {
157 ctx->Unpack.SkipRows = param;
158 }
159 break;
160 case GL_UNPACK_ALIGNMENT:
161 if (param==1 || param==2 || param==4 || param==8) {
162 ctx->Unpack.Alignment = param;
163 }
164 else {
165 gl_error( ctx, GL_INVALID_VALUE, "glPixelStore" );
166 }
167 break;
168 default:
169 gl_error( ctx, GL_INVALID_ENUM, "glPixelStore" );
170 }
171}
172
173
174void
175_mesa_PixelStoref( GLenum pname, GLfloat param )
176{
177 _mesa_PixelStorei( pname, (GLint) param );
178}
179
180
181
182/**********************************************************************/
183/***** glPixelMap *****/
184/**********************************************************************/
185
186
187
188void
189_mesa_PixelMapfv( GLenum map, GLint mapsize, const GLfloat *values )
190{
191 GLint i;
192 GET_CURRENT_CONTEXT(ctx);
193 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPixelMapfv");
194
195
196 if (mapsize<0 || mapsize>MAX_PIXEL_MAP_TABLE) {
197 gl_error( ctx, GL_INVALID_VALUE, "glPixelMapfv(mapsize)" );
198 return;
199 }
200
201 if (map>=GL_PIXEL_MAP_S_TO_S && map<=GL_PIXEL_MAP_I_TO_A) {
202 /* test that mapsize is a power of two */
203 GLuint p;
204 GLboolean ok = GL_FALSE;
205 for (p=1; p<=MAX_PIXEL_MAP_TABLE; p=p<<1) {
206 if ( (p&mapsize) == p ) {
207 ok = GL_TRUE;
208 break;
209 }
210 }
211 if (!ok) {
212 gl_error( ctx, GL_INVALID_VALUE, "glPixelMapfv(mapsize)" );
213 return;
214 }
215 }
216
217 switch (map) {
218 case GL_PIXEL_MAP_S_TO_S:
219 ctx->Pixel.MapStoSsize = mapsize;
220 for (i=0;i<mapsize;i++) {
221 ctx->Pixel.MapStoS[i] = (GLint) values[i];
222 }
223 break;
224 case GL_PIXEL_MAP_I_TO_I:
225 ctx->Pixel.MapItoIsize = mapsize;
226 for (i=0;i<mapsize;i++) {
227 ctx->Pixel.MapItoI[i] = (GLint) values[i];
228 }
229 break;
230 case GL_PIXEL_MAP_I_TO_R:
231 ctx->Pixel.MapItoRsize = mapsize;
232 for (i=0;i<mapsize;i++) {
233 GLfloat val = CLAMP( values[i], 0.0, 1.0 );
234 ctx->Pixel.MapItoR[i] = val;
235 ctx->Pixel.MapItoR8[i] = (GLint) (val * 255.0F);
236 }
237 break;
238 case GL_PIXEL_MAP_I_TO_G:
239 ctx->Pixel.MapItoGsize = mapsize;
240 for (i=0;i<mapsize;i++) {
241 GLfloat val = CLAMP( values[i], 0.0, 1.0 );
242 ctx->Pixel.MapItoG[i] = val;
243 ctx->Pixel.MapItoG8[i] = (GLint) (val * 255.0F);
244 }
245 break;
246 case GL_PIXEL_MAP_I_TO_B:
247 ctx->Pixel.MapItoBsize = mapsize;
248 for (i=0;i<mapsize;i++) {
249 GLfloat val = CLAMP( values[i], 0.0, 1.0 );
250 ctx->Pixel.MapItoB[i] = val;
251 ctx->Pixel.MapItoB8[i] = (GLint) (val * 255.0F);
252 }
253 break;
254 case GL_PIXEL_MAP_I_TO_A:
255 ctx->Pixel.MapItoAsize = mapsize;
256 for (i=0;i<mapsize;i++) {
257 GLfloat val = CLAMP( values[i], 0.0, 1.0 );
258 ctx->Pixel.MapItoA[i] = val;
259 ctx->Pixel.MapItoA8[i] = (GLint) (val * 255.0F);
260 }
261 break;
262 case GL_PIXEL_MAP_R_TO_R:
263 ctx->Pixel.MapRtoRsize = mapsize;
264 for (i=0;i<mapsize;i++) {
265 ctx->Pixel.MapRtoR[i] = CLAMP( values[i], 0.0, 1.0 );
266 }
267 break;
268 case GL_PIXEL_MAP_G_TO_G:
269 ctx->Pixel.MapGtoGsize = mapsize;
270 for (i=0;i<mapsize;i++) {
271 ctx->Pixel.MapGtoG[i] = CLAMP( values[i], 0.0, 1.0 );
272 }
273 break;
274 case GL_PIXEL_MAP_B_TO_B:
275 ctx->Pixel.MapBtoBsize = mapsize;
276 for (i=0;i<mapsize;i++) {
277 ctx->Pixel.MapBtoB[i] = CLAMP( values[i], 0.0, 1.0 );
278 }
279 break;
280 case GL_PIXEL_MAP_A_TO_A:
281 ctx->Pixel.MapAtoAsize = mapsize;
282 for (i=0;i<mapsize;i++) {
283 ctx->Pixel.MapAtoA[i] = CLAMP( values[i], 0.0, 1.0 );
284 }
285 break;
286 default:
287 gl_error( ctx, GL_INVALID_ENUM, "glPixelMapfv(map)" );
288 }
289}
290
291
292void
293_mesa_PixelMapuiv(GLenum map, GLint mapsize, const GLuint *values )
294{
295 GLfloat fvalues[MAX_PIXEL_MAP_TABLE];
296 GLint i;
297 if (map==GL_PIXEL_MAP_I_TO_I || map==GL_PIXEL_MAP_S_TO_S) {
298 for (i=0;i<mapsize;i++) {
299 fvalues[i] = (GLfloat) values[i];
300 }
301 }
302 else {
303 for (i=0;i<mapsize;i++) {
304 fvalues[i] = UINT_TO_FLOAT( values[i] );
305 }
306 }
307 _mesa_PixelMapfv(map, mapsize, fvalues);
308}
309
310
311
312void
313_mesa_PixelMapusv(GLenum map, GLint mapsize, const GLushort *values )
314{
315 GLfloat fvalues[MAX_PIXEL_MAP_TABLE];
316 GLint i;
317 if (map==GL_PIXEL_MAP_I_TO_I || map==GL_PIXEL_MAP_S_TO_S) {
318 for (i=0;i<mapsize;i++) {
319 fvalues[i] = (GLfloat) values[i];
320 }
321 }
322 else {
323 for (i=0;i<mapsize;i++) {
324 fvalues[i] = USHORT_TO_FLOAT( values[i] );
325 }
326 }
327 _mesa_PixelMapfv(map, mapsize, fvalues);
328}
329
330
331
332
333
334void
335_mesa_GetPixelMapfv( GLenum map, GLfloat *values )
336{
337 GET_CURRENT_CONTEXT(ctx);
338 GLint i;
339
340 ASSERT_OUTSIDE_BEGIN_END(ctx, "glGetPixelMapfv");
341
342 switch (map) {
343 case GL_PIXEL_MAP_I_TO_I:
344 for (i=0;i<ctx->Pixel.MapItoIsize;i++) {
345 values[i] = (GLfloat) ctx->Pixel.MapItoI[i];
346 }
347 break;
348 case GL_PIXEL_MAP_S_TO_S:
349 for (i=0;i<ctx->Pixel.MapStoSsize;i++) {
350 values[i] = (GLfloat) ctx->Pixel.MapStoS[i];
351 }
352 break;
353 case GL_PIXEL_MAP_I_TO_R:
354 MEMCPY(values,ctx->Pixel.MapItoR,ctx->Pixel.MapItoRsize*sizeof(GLfloat));
355 break;
356 case GL_PIXEL_MAP_I_TO_G:
357 MEMCPY(values,ctx->Pixel.MapItoG,ctx->Pixel.MapItoGsize*sizeof(GLfloat));
358 break;
359 case GL_PIXEL_MAP_I_TO_B:
360 MEMCPY(values,ctx->Pixel.MapItoB,ctx->Pixel.MapItoBsize*sizeof(GLfloat));
361 break;
362 case GL_PIXEL_MAP_I_TO_A:
363 MEMCPY(values,ctx->Pixel.MapItoA,ctx->Pixel.MapItoAsize*sizeof(GLfloat));
364 break;
365 case GL_PIXEL_MAP_R_TO_R:
366 MEMCPY(values,ctx->Pixel.MapRtoR,ctx->Pixel.MapRtoRsize*sizeof(GLfloat));
367 break;
368 case GL_PIXEL_MAP_G_TO_G:
369 MEMCPY(values,ctx->Pixel.MapGtoG,ctx->Pixel.MapGtoGsize*sizeof(GLfloat));
370 break;
371 case GL_PIXEL_MAP_B_TO_B:
372 MEMCPY(values,ctx->Pixel.MapBtoB,ctx->Pixel.MapBtoBsize*sizeof(GLfloat));
373 break;
374 case GL_PIXEL_MAP_A_TO_A:
375 MEMCPY(values,ctx->Pixel.MapAtoA,ctx->Pixel.MapAtoAsize*sizeof(GLfloat));
376 break;
377 default:
378 gl_error( ctx, GL_INVALID_ENUM, "glGetPixelMapfv" );
379 }
380}
381
382
383void
384_mesa_GetPixelMapuiv( GLenum map, GLuint *values )
385{
386 GET_CURRENT_CONTEXT(ctx);
387 GLint i;
388
389 ASSERT_OUTSIDE_BEGIN_END(ctx, "glGetPixelMapfv");
390
391 switch (map) {
392 case GL_PIXEL_MAP_I_TO_I:
393 MEMCPY(values, ctx->Pixel.MapItoI, ctx->Pixel.MapItoIsize*sizeof(GLint));
394 break;
395 case GL_PIXEL_MAP_S_TO_S:
396 MEMCPY(values, ctx->Pixel.MapStoS, ctx->Pixel.MapStoSsize*sizeof(GLint));
397 break;
398 case GL_PIXEL_MAP_I_TO_R:
399 for (i=0;i<ctx->Pixel.MapItoRsize;i++) {
400 values[i] = FLOAT_TO_UINT( ctx->Pixel.MapItoR[i] );
401 }
402 break;
403 case GL_PIXEL_MAP_I_TO_G:
404 for (i=0;i<ctx->Pixel.MapItoGsize;i++) {
405 values[i] = FLOAT_TO_UINT( ctx->Pixel.MapItoG[i] );
406 }
407 break;
408 case GL_PIXEL_MAP_I_TO_B:
409 for (i=0;i<ctx->Pixel.MapItoBsize;i++) {
410 values[i] = FLOAT_TO_UINT( ctx->Pixel.MapItoB[i] );
411 }
412 break;
413 case GL_PIXEL_MAP_I_TO_A:
414 for (i=0;i<ctx->Pixel.MapItoAsize;i++) {
415 values[i] = FLOAT_TO_UINT( ctx->Pixel.MapItoA[i] );
416 }
417 break;
418 case GL_PIXEL_MAP_R_TO_R:
419 for (i=0;i<ctx->Pixel.MapRtoRsize;i++) {
420 values[i] = FLOAT_TO_UINT( ctx->Pixel.MapRtoR[i] );
421 }
422 break;
423 case GL_PIXEL_MAP_G_TO_G:
424 for (i=0;i<ctx->Pixel.MapGtoGsize;i++) {
425 values[i] = FLOAT_TO_UINT( ctx->Pixel.MapGtoG[i] );
426 }
427 break;
428 case GL_PIXEL_MAP_B_TO_B:
429 for (i=0;i<ctx->Pixel.MapBtoBsize;i++) {
430 values[i] = FLOAT_TO_UINT( ctx->Pixel.MapBtoB[i] );
431 }
432 break;
433 case GL_PIXEL_MAP_A_TO_A:
434 for (i=0;i<ctx->Pixel.MapAtoAsize;i++) {
435 values[i] = FLOAT_TO_UINT( ctx->Pixel.MapAtoA[i] );
436 }
437 break;
438 default:
439 gl_error( ctx, GL_INVALID_ENUM, "glGetPixelMapfv" );
440 }
441}
442
443
444void
445_mesa_GetPixelMapusv( GLenum map, GLushort *values )
446{
447 GET_CURRENT_CONTEXT(ctx);
448 GLint i;
449
450 ASSERT_OUTSIDE_BEGIN_END(ctx, "glGetPixelMapfv");
451
452 switch (map) {
453 case GL_PIXEL_MAP_I_TO_I:
454 for (i=0;i<ctx->Pixel.MapItoIsize;i++) {
455 values[i] = (GLushort) ctx->Pixel.MapItoI[i];
456 }
457 break;
458 case GL_PIXEL_MAP_S_TO_S:
459 for (i=0;i<ctx->Pixel.MapStoSsize;i++) {
460 values[i] = (GLushort) ctx->Pixel.MapStoS[i];
461 }
462 break;
463 case GL_PIXEL_MAP_I_TO_R:
464 for (i=0;i<ctx->Pixel.MapItoRsize;i++) {
465 values[i] = FLOAT_TO_USHORT( ctx->Pixel.MapItoR[i] );
466 }
467 break;
468 case GL_PIXEL_MAP_I_TO_G:
469 for (i=0;i<ctx->Pixel.MapItoGsize;i++) {
470 values[i] = FLOAT_TO_USHORT( ctx->Pixel.MapItoG[i] );
471 }
472 break;
473 case GL_PIXEL_MAP_I_TO_B:
474 for (i=0;i<ctx->Pixel.MapItoBsize;i++) {
475 values[i] = FLOAT_TO_USHORT( ctx->Pixel.MapItoB[i] );
476 }
477 break;
478 case GL_PIXEL_MAP_I_TO_A:
479 for (i=0;i<ctx->Pixel.MapItoAsize;i++) {
480 values[i] = FLOAT_TO_USHORT( ctx->Pixel.MapItoA[i] );
481 }
482 break;
483 case GL_PIXEL_MAP_R_TO_R:
484 for (i=0;i<ctx->Pixel.MapRtoRsize;i++) {
485 values[i] = FLOAT_TO_USHORT( ctx->Pixel.MapRtoR[i] );
486 }
487 break;
488 case GL_PIXEL_MAP_G_TO_G:
489 for (i=0;i<ctx->Pixel.MapGtoGsize;i++) {
490 values[i] = FLOAT_TO_USHORT( ctx->Pixel.MapGtoG[i] );
491 }
492 break;
493 case GL_PIXEL_MAP_B_TO_B:
494 for (i=0;i<ctx->Pixel.MapBtoBsize;i++) {
495 values[i] = FLOAT_TO_USHORT( ctx->Pixel.MapBtoB[i] );
496 }
497 break;
498 case GL_PIXEL_MAP_A_TO_A:
499 for (i=0;i<ctx->Pixel.MapAtoAsize;i++) {
500 values[i] = FLOAT_TO_USHORT( ctx->Pixel.MapAtoA[i] );
501 }
502 break;
503 default:
504 gl_error( ctx, GL_INVALID_ENUM, "glGetPixelMapfv" );
505 }
506}
507
508
509
510/**********************************************************************/
511/***** glPixelTransfer *****/
512/**********************************************************************/
513
514
515/*
516 * Implements glPixelTransfer[fi] whether called immediately or from a
517 * display list.
518 */
519void
520_mesa_PixelTransferf( GLenum pname, GLfloat param )
521{
522 GET_CURRENT_CONTEXT(ctx);
523 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPixelTransfer");
524
525
526 switch (pname) {
527 case GL_MAP_COLOR:
528 ctx->Pixel.MapColorFlag = param ? GL_TRUE : GL_FALSE;
529 break;
530 case GL_MAP_STENCIL:
531 ctx->Pixel.MapStencilFlag = param ? GL_TRUE : GL_FALSE;
532 break;
533 case GL_INDEX_SHIFT:
534 ctx->Pixel.IndexShift = (GLint) param;
535 break;
536 case GL_INDEX_OFFSET:
537 ctx->Pixel.IndexOffset = (GLint) param;
538 break;
539 case GL_RED_SCALE:
540 ctx->Pixel.RedScale = param;
541 break;
542 case GL_RED_BIAS:
543 ctx->Pixel.RedBias = param;
544 break;
545 case GL_GREEN_SCALE:
546 ctx->Pixel.GreenScale = param;
547 break;
548 case GL_GREEN_BIAS:
549 ctx->Pixel.GreenBias = param;
550 break;
551 case GL_BLUE_SCALE:
552 ctx->Pixel.BlueScale = param;
553 break;
554 case GL_BLUE_BIAS:
555 ctx->Pixel.BlueBias = param;
556 break;
557 case GL_ALPHA_SCALE:
558 ctx->Pixel.AlphaScale = param;
559 break;
560 case GL_ALPHA_BIAS:
561 ctx->Pixel.AlphaBias = param;
562 break;
563 case GL_DEPTH_SCALE:
564 ctx->Pixel.DepthScale = param;
565 break;
566 case GL_DEPTH_BIAS:
567 ctx->Pixel.DepthBias = param;
568 break;
569 default:
570 gl_error( ctx, GL_INVALID_ENUM, "glPixelTransfer(pname)" );
571 return;
572 }
573
574 if (ctx->Pixel.RedScale!=1.0F || ctx->Pixel.RedBias!=0.0F ||
575 ctx->Pixel.GreenScale!=1.0F || ctx->Pixel.GreenBias!=0.0F ||
576 ctx->Pixel.BlueScale!=1.0F || ctx->Pixel.BlueBias!=0.0F ||
577 ctx->Pixel.AlphaScale!=1.0F || ctx->Pixel.AlphaBias!=0.0F) {
578 ctx->Pixel.ScaleOrBiasRGBA = GL_TRUE;
579 }
580 else {
581 ctx->Pixel.ScaleOrBiasRGBA = GL_FALSE;
582 }
583}
584
585
586void
587_mesa_PixelTransferi( GLenum pname, GLint param )
588{
589 _mesa_PixelTransferf( pname, (GLfloat) param );
590}
591
592
593
594
595/*
596 * Pixel processing functions
597 */
598
599
600/*
601 * Apply scale and bias factors to an array of RGBA pixels.
602 */
603void gl_scale_and_bias_color( const GLcontext *ctx, GLuint n,
604 GLfloat red[], GLfloat green[],
605 GLfloat blue[], GLfloat alpha[] )
606{
607 GLuint i;
608 for (i=0;i<n;i++) {
609 GLfloat r = red[i] * ctx->Pixel.RedScale + ctx->Pixel.RedBias;
610 GLfloat g = green[i] * ctx->Pixel.GreenScale + ctx->Pixel.GreenBias;
611 GLfloat b = blue[i] * ctx->Pixel.BlueScale + ctx->Pixel.BlueBias;
612 GLfloat a = alpha[i] * ctx->Pixel.AlphaScale + ctx->Pixel.AlphaBias;
613 red[i] = CLAMP( r, 0.0F, 1.0F );
614 green[i] = CLAMP( g, 0.0F, 1.0F );
615 blue[i] = CLAMP( b, 0.0F, 1.0F );
616 alpha[i] = CLAMP( a, 0.0F, 1.0F );
617 }
618}
619
620
621/*
622 * Apply scale and bias factors to an array of RGBA pixels.
623 */
624void gl_scale_and_bias_rgba( const GLcontext *ctx, GLuint n, GLubyte rgba[][4] )
625{
626 GLfloat rbias = ctx->Pixel.RedBias * 255.0F;
627 GLfloat gbias = ctx->Pixel.GreenBias * 255.0F;
628 GLfloat bbias = ctx->Pixel.BlueBias * 255.0F;
629 GLfloat abias = ctx->Pixel.AlphaBias * 255.0F;
630 GLuint i;
631 for (i=0;i<n;i++) {
632 GLint r = (GLint) (rgba[i][RCOMP] * ctx->Pixel.RedScale + rbias);
633 GLint g = (GLint) (rgba[i][GCOMP] * ctx->Pixel.GreenScale + gbias);
634 GLint b = (GLint) (rgba[i][BCOMP] * ctx->Pixel.BlueScale + bbias);
635 GLint a = (GLint) (rgba[i][ACOMP] * ctx->Pixel.AlphaScale + abias);
636 rgba[i][RCOMP] = CLAMP( r, 0, 255 );
637 rgba[i][GCOMP] = CLAMP( g, 0, 255 );
638 rgba[i][BCOMP] = CLAMP( b, 0, 255 );
639 rgba[i][ACOMP] = CLAMP( a, 0, 255 );
640 }
641}
642
643
644/*
645 * Apply scale and bias factors to an array of RGBA pixels.
646 */
647void gl_scale_and_bias_rgba_float( const GLcontext *ctx, GLuint n, GLfloat rgba[][4] )
648{
649 if (ctx->Pixel.RedScale != 1.0 || ctx->Pixel.RedBias != 0.0) {
650 const GLfloat scale = ctx->Pixel.RedScale;
651 const GLfloat bias = ctx->Pixel.RedBias;
652 GLuint i;
653 for (i = 0; i < n; i++) {
654 rgba[i][RCOMP] = rgba[i][RCOMP] * scale + bias;
655 }
656 }
657 if (ctx->Pixel.GreenScale != 1.0 || ctx->Pixel.GreenBias != 0.0) {
658 const GLfloat scale = ctx->Pixel.GreenScale;
659 const GLfloat bias = ctx->Pixel.GreenBias;
660 GLuint i;
661 for (i = 0; i < n; i++) {
662 rgba[i][GCOMP] = rgba[i][GCOMP] * scale + bias;
663 }
664 }
665 if (ctx->Pixel.BlueScale != 1.0 || ctx->Pixel.BlueBias != 0.0) {
666 const GLfloat scale = ctx->Pixel.BlueScale;
667 const GLfloat bias = ctx->Pixel.BlueBias;
668 GLuint i;
669 for (i = 0; i < n; i++) {
670 rgba[i][BCOMP] = rgba[i][BCOMP] * scale + bias;
671 }
672 }
673 if (ctx->Pixel.AlphaScale != 1.0 || ctx->Pixel.AlphaBias != 0.0) {
674 const GLfloat scale = ctx->Pixel.AlphaScale;
675 const GLfloat bias = ctx->Pixel.AlphaBias;
676 GLuint i;
677 for (i = 0; i < n; i++) {
678 rgba[i][ACOMP] = rgba[i][ACOMP] * scale + bias;
679 }
680 }
681}
682
683
684/*
685 * Apply pixel mapping to an array of RGBA pixels.
686 */
687void gl_map_rgba( const GLcontext *ctx, GLuint n, GLubyte rgba[][4] )
688{
689 GLfloat rscale = (ctx->Pixel.MapRtoRsize - 1) / 255.0F;
690 GLfloat gscale = (ctx->Pixel.MapGtoGsize - 1) / 255.0F;
691 GLfloat bscale = (ctx->Pixel.MapBtoBsize - 1) / 255.0F;
692 GLfloat ascale = (ctx->Pixel.MapAtoAsize - 1) / 255.0F;
693 GLuint i;
694 for (i=0;i<n;i++) {
695 GLint ir = (GLint) (rgba[i][RCOMP] * rscale);
696 GLint ig = (GLint) (rgba[i][GCOMP] * gscale);
697 GLint ib = (GLint) (rgba[i][BCOMP] * bscale);
698 GLint ia = (GLint) (rgba[i][ACOMP] * ascale);
699 rgba[i][RCOMP] = (GLint) (ctx->Pixel.MapRtoR[ir] * 255.0F);
700 rgba[i][GCOMP] = (GLint) (ctx->Pixel.MapGtoG[ig] * 255.0F);
701 rgba[i][BCOMP] = (GLint) (ctx->Pixel.MapBtoB[ib] * 255.0F);
702 rgba[i][ACOMP] = (GLint) (ctx->Pixel.MapAtoA[ia] * 255.0F);
703 }
704}
705
706
707/*
708 * Apply pixel mapping to an array of floating point RGBA pixels.
709 */
710void gl_map_rgba_float( const GLcontext *ctx, GLuint n, GLfloat rgba[][4] )
711{
712 const GLfloat rscale = ctx->Pixel.MapRtoRsize - 1;
713 const GLfloat gscale = ctx->Pixel.MapGtoGsize - 1;
714 const GLfloat bscale = ctx->Pixel.MapBtoBsize - 1;
715 const GLfloat ascale = ctx->Pixel.MapAtoAsize - 1;
716 const GLfloat *rMap = ctx->Pixel.MapRtoR;
717 const GLfloat *gMap = ctx->Pixel.MapGtoG;
718 const GLfloat *bMap = ctx->Pixel.MapBtoB;
719 const GLfloat *aMap = ctx->Pixel.MapAtoA;
720 GLuint i;
721 for (i=0;i<n;i++) {
722 rgba[i][RCOMP] = rMap[(GLint) (rgba[i][RCOMP] * rscale + 0.5F)];
723 rgba[i][GCOMP] = gMap[(GLint) (rgba[i][GCOMP] * gscale + 0.5F)];
724 rgba[i][BCOMP] = bMap[(GLint) (rgba[i][BCOMP] * bscale + 0.5F)];
725 rgba[i][ACOMP] = aMap[(GLint) (rgba[i][ACOMP] * ascale + 0.5F)];
726 }
727}
728
729
730/*
731 * Apply pixel mapping to an array of RGBA pixels.
732 */
733void gl_map_color( const GLcontext *ctx, GLuint n,
734 GLfloat red[], GLfloat green[],
735 GLfloat blue[], GLfloat alpha[] )
736{
737 GLfloat rscale = ctx->Pixel.MapRtoRsize - 1;
738 GLfloat gscale = ctx->Pixel.MapGtoGsize - 1;
739 GLfloat bscale = ctx->Pixel.MapBtoBsize - 1;
740 GLfloat ascale = ctx->Pixel.MapAtoAsize - 1;
741 GLuint i;
742 for (i=0;i<n;i++) {
743 red[i] = ctx->Pixel.MapRtoR[ (GLint) (red[i] * rscale + 0.5F) ];
744 green[i] = ctx->Pixel.MapGtoG[ (GLint) (green[i] * gscale + 0.5F) ];
745 blue[i] = ctx->Pixel.MapBtoB[ (GLint) (blue[i] * bscale + 0.5F) ];
746 alpha[i] = ctx->Pixel.MapAtoA[ (GLint) (alpha[i] * ascale + 0.5F) ];
747 }
748}
749
750
751
752/*
753 * Apply color index shift and offset to an array of pixels.
754 */
755void gl_shift_and_offset_ci( const GLcontext *ctx, GLuint n, GLuint indexes[] )
756{
757 GLint shift = ctx->Pixel.IndexShift;
758 GLint offset = ctx->Pixel.IndexOffset;
759 GLuint i;
760 if (shift > 0) {
761 for (i=0;i<n;i++) {
762 indexes[i] = (indexes[i] << shift) + offset;
763 }
764 }
765 else if (shift < 0) {
766 shift = -shift;
767 for (i=0;i<n;i++) {
768 indexes[i] = (indexes[i] >> shift) + offset;
769 }
770 }
771 else {
772 for (i=0;i<n;i++) {
773 indexes[i] = indexes[i] + offset;
774 }
775 }
776}
777
778
779/*
780 * Apply color index mapping to color indexes.
781 */
782void gl_map_ci( const GLcontext *ctx, GLuint n, GLuint index[] )
783{
784 GLuint mask = ctx->Pixel.MapItoIsize - 1;
785 GLuint i;
786 for (i=0;i<n;i++) {
787 index[i] = ctx->Pixel.MapItoI[ index[i] & mask ];
788 }
789}
790
791
792/*
793 * Map color indexes to rgba values.
794 */
795void gl_map_ci_to_rgba( const GLcontext *ctx, GLuint n, const GLuint index[],
796 GLubyte rgba[][4] )
797{
798 GLuint rmask = ctx->Pixel.MapItoRsize - 1;
799 GLuint gmask = ctx->Pixel.MapItoGsize - 1;
800 GLuint bmask = ctx->Pixel.MapItoBsize - 1;
801 GLuint amask = ctx->Pixel.MapItoAsize - 1;
802 const GLubyte *rMap = ctx->Pixel.MapItoR8;
803 const GLubyte *gMap = ctx->Pixel.MapItoG8;
804 const GLubyte *bMap = ctx->Pixel.MapItoB8;
805 const GLubyte *aMap = ctx->Pixel.MapItoA8;
806 GLuint i;
807 for (i=0;i<n;i++) {
808 rgba[i][RCOMP] = rMap[index[i] & rmask];
809 rgba[i][GCOMP] = gMap[index[i] & gmask];
810 rgba[i][BCOMP] = bMap[index[i] & bmask];
811 rgba[i][ACOMP] = aMap[index[i] & amask];
812 }
813}
814
815
816/*
817 * Map color indexes to float rgba values.
818 */
819void gl_map_ci_to_rgba_float( const GLcontext *ctx, GLuint n, const GLuint index[],
820 GLfloat rgba[][4] )
821{
822 GLuint rmask = ctx->Pixel.MapItoRsize - 1;
823 GLuint gmask = ctx->Pixel.MapItoGsize - 1;
824 GLuint bmask = ctx->Pixel.MapItoBsize - 1;
825 GLuint amask = ctx->Pixel.MapItoAsize - 1;
826 const GLfloat *rMap = ctx->Pixel.MapItoR;
827 const GLfloat *gMap = ctx->Pixel.MapItoG;
828 const GLfloat *bMap = ctx->Pixel.MapItoB;
829 const GLfloat *aMap = ctx->Pixel.MapItoA;
830 GLuint i;
831 for (i=0;i<n;i++) {
832 rgba[i][RCOMP] = rMap[index[i] & rmask];
833 rgba[i][GCOMP] = gMap[index[i] & gmask];
834 rgba[i][BCOMP] = bMap[index[i] & bmask];
835 rgba[i][ACOMP] = aMap[index[i] & amask];
836 }
837}
838
839
840/*
841 * Map 8-bit color indexes to rgb values.
842 */
843void gl_map_ci8_to_rgba( const GLcontext *ctx, GLuint n, const GLubyte index[],
844 GLubyte rgba[][4] )
845{
846 GLuint rmask = ctx->Pixel.MapItoRsize - 1;
847 GLuint gmask = ctx->Pixel.MapItoGsize - 1;
848 GLuint bmask = ctx->Pixel.MapItoBsize - 1;
849 GLuint amask = ctx->Pixel.MapItoAsize - 1;
850 const GLubyte *rMap = ctx->Pixel.MapItoR8;
851 const GLubyte *gMap = ctx->Pixel.MapItoG8;
852 const GLubyte *bMap = ctx->Pixel.MapItoB8;
853 const GLubyte *aMap = ctx->Pixel.MapItoA8;
854 GLuint i;
855 for (i=0;i<n;i++) {
856 rgba[i][RCOMP] = rMap[index[i] & rmask];
857 rgba[i][GCOMP] = gMap[index[i] & gmask];
858 rgba[i][BCOMP] = bMap[index[i] & bmask];
859 rgba[i][ACOMP] = aMap[index[i] & amask];
860 }
861}
862
863
864void gl_map_ci_to_color( const GLcontext *ctx, GLuint n, const GLuint index[],
865 GLfloat r[], GLfloat g[],
866 GLfloat b[], GLfloat a[] )
867{
868 GLuint rmask = ctx->Pixel.MapItoRsize - 1;
869 GLuint gmask = ctx->Pixel.MapItoGsize - 1;
870 GLuint bmask = ctx->Pixel.MapItoBsize - 1;
871 GLuint amask = ctx->Pixel.MapItoAsize - 1;
872 GLuint i;
873 for (i=0;i<n;i++) {
874 r[i] = ctx->Pixel.MapItoR[index[i] & rmask];
875 g[i] = ctx->Pixel.MapItoG[index[i] & gmask];
876 b[i] = ctx->Pixel.MapItoB[index[i] & bmask];
877 a[i] = ctx->Pixel.MapItoA[index[i] & amask];
878 }
879}
880
881
882
883void gl_shift_and_offset_stencil( const GLcontext *ctx, GLuint n,
884 GLstencil stencil[] )
885{
886 GLuint i;
887 GLint shift = ctx->Pixel.IndexShift;
888 GLint offset = ctx->Pixel.IndexOffset;
889 if (shift > 0) {
890 for (i=0;i<n;i++) {
891 stencil[i] = (stencil[i] << shift) + offset;
892 }
893 }
894 else if (shift < 0) {
895 shift = -shift;
896 for (i=0;i<n;i++) {
897 stencil[i] = (stencil[i] >> shift) + offset;
898 }
899 }
900 else {
901 for (i=0;i<n;i++) {
902 stencil[i] = stencil[i] + offset;
903 }
904 }
905
906}
907
908
909
910void gl_map_stencil( const GLcontext *ctx, GLuint n, GLstencil stencil[] )
911{
912 GLuint mask = ctx->Pixel.MapStoSsize - 1;
913 GLuint i;
914 for (i=0;i<n;i++) {
915 stencil[i] = ctx->Pixel.MapStoS[ stencil[i] & mask ];
916 }
917}
918
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