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Massively cleaned up the code that calculates front/back/depth buffer
[mesa.git] / src / mesa / main / histogram.c
1 /*
2 * Mesa 3-D graphics library
3 * Version: 6.1
4 *
5 * Copyright (C) 1999-2004 Brian Paul All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25
26 #include "glheader.h"
27 #include "colormac.h"
28 #include "context.h"
29 #include "image.h"
30 #include "histogram.h"
31
32
33 /**********************************************************************
34 * Internal functions
35 */
36
37
38 /*
39 * Update the min/max values from an array of fragment colors.
40 */
41 void
42 _mesa_update_minmax(GLcontext *ctx, GLuint n, const GLfloat rgba[][4])
43 {
44 GLuint i;
45 for (i = 0; i < n; i++) {
46 /* update mins */
47 if (rgba[i][RCOMP] < ctx->MinMax.Min[RCOMP])
48 ctx->MinMax.Min[RCOMP] = rgba[i][RCOMP];
49 if (rgba[i][GCOMP] < ctx->MinMax.Min[GCOMP])
50 ctx->MinMax.Min[GCOMP] = rgba[i][GCOMP];
51 if (rgba[i][BCOMP] < ctx->MinMax.Min[BCOMP])
52 ctx->MinMax.Min[BCOMP] = rgba[i][BCOMP];
53 if (rgba[i][ACOMP] < ctx->MinMax.Min[ACOMP])
54 ctx->MinMax.Min[ACOMP] = rgba[i][ACOMP];
55
56 /* update maxs */
57 if (rgba[i][RCOMP] > ctx->MinMax.Max[RCOMP])
58 ctx->MinMax.Max[RCOMP] = rgba[i][RCOMP];
59 if (rgba[i][GCOMP] > ctx->MinMax.Max[GCOMP])
60 ctx->MinMax.Max[GCOMP] = rgba[i][GCOMP];
61 if (rgba[i][BCOMP] > ctx->MinMax.Max[BCOMP])
62 ctx->MinMax.Max[BCOMP] = rgba[i][BCOMP];
63 if (rgba[i][ACOMP] > ctx->MinMax.Max[ACOMP])
64 ctx->MinMax.Max[ACOMP] = rgba[i][ACOMP];
65 }
66 }
67
68
69 /*
70 * Update the histogram values from an array of fragment colors.
71 */
72 void
73 _mesa_update_histogram(GLcontext *ctx, GLuint n, const GLfloat rgba[][4])
74 {
75 const GLint max = ctx->Histogram.Width - 1;
76 GLfloat w = (GLfloat) max;
77 GLuint i;
78
79 if (ctx->Histogram.Width == 0)
80 return;
81
82 for (i = 0; i < n; i++) {
83 GLint ri = IROUND(rgba[i][RCOMP] * w);
84 GLint gi = IROUND(rgba[i][GCOMP] * w);
85 GLint bi = IROUND(rgba[i][BCOMP] * w);
86 GLint ai = IROUND(rgba[i][ACOMP] * w);
87 ri = CLAMP(ri, 0, max);
88 gi = CLAMP(gi, 0, max);
89 bi = CLAMP(bi, 0, max);
90 ai = CLAMP(ai, 0, max);
91 ctx->Histogram.Count[ri][RCOMP]++;
92 ctx->Histogram.Count[gi][GCOMP]++;
93 ctx->Histogram.Count[bi][BCOMP]++;
94 ctx->Histogram.Count[ai][ACOMP]++;
95 }
96 }
97
98
99 /*
100 * XXX the packed pixel formats haven't been tested.
101 */
102 static void
103 pack_histogram( GLcontext *ctx,
104 GLuint n, CONST GLuint rgba[][4],
105 GLenum format, GLenum type, GLvoid *destination,
106 const struct gl_pixelstore_attrib *packing )
107 {
108 const GLint comps = _mesa_components_in_format(format);
109 GLuint luminance[MAX_WIDTH];
110
111 if (format == GL_LUMINANCE || format == GL_LUMINANCE_ALPHA) {
112 GLuint i;
113 for (i = 0; i < n; i++) {
114 luminance[i] = rgba[i][RCOMP] + rgba[i][GCOMP] + rgba[i][BCOMP];
115 }
116 }
117
118 #define PACK_MACRO(TYPE) \
119 { \
120 GLuint i; \
121 switch (format) { \
122 case GL_RED: \
123 for (i=0;i<n;i++) \
124 dst[i] = (TYPE) rgba[i][RCOMP]; \
125 break; \
126 case GL_GREEN: \
127 for (i=0;i<n;i++) \
128 dst[i] = (TYPE) rgba[i][GCOMP]; \
129 break; \
130 case GL_BLUE: \
131 for (i=0;i<n;i++) \
132 dst[i] = (TYPE) rgba[i][BCOMP]; \
133 break; \
134 case GL_ALPHA: \
135 for (i=0;i<n;i++) \
136 dst[i] = (TYPE) rgba[i][ACOMP]; \
137 break; \
138 case GL_LUMINANCE: \
139 for (i=0;i<n;i++) \
140 dst[i] = (TYPE) luminance[i]; \
141 break; \
142 case GL_LUMINANCE_ALPHA: \
143 for (i=0;i<n;i++) { \
144 dst[i*2+0] = (TYPE) luminance[i]; \
145 dst[i*2+1] = (TYPE) rgba[i][ACOMP]; \
146 } \
147 break; \
148 case GL_RGB: \
149 for (i=0;i<n;i++) { \
150 dst[i*3+0] = (TYPE) rgba[i][RCOMP]; \
151 dst[i*3+1] = (TYPE) rgba[i][GCOMP]; \
152 dst[i*3+2] = (TYPE) rgba[i][BCOMP]; \
153 } \
154 break; \
155 case GL_RGBA: \
156 for (i=0;i<n;i++) { \
157 dst[i*4+0] = (TYPE) rgba[i][RCOMP]; \
158 dst[i*4+1] = (TYPE) rgba[i][GCOMP]; \
159 dst[i*4+2] = (TYPE) rgba[i][BCOMP]; \
160 dst[i*4+3] = (TYPE) rgba[i][ACOMP]; \
161 } \
162 break; \
163 case GL_BGR: \
164 for (i=0;i<n;i++) { \
165 dst[i*3+0] = (TYPE) rgba[i][BCOMP]; \
166 dst[i*3+1] = (TYPE) rgba[i][GCOMP]; \
167 dst[i*3+2] = (TYPE) rgba[i][RCOMP]; \
168 } \
169 break; \
170 case GL_BGRA: \
171 for (i=0;i<n;i++) { \
172 dst[i*4+0] = (TYPE) rgba[i][BCOMP]; \
173 dst[i*4+1] = (TYPE) rgba[i][GCOMP]; \
174 dst[i*4+2] = (TYPE) rgba[i][RCOMP]; \
175 dst[i*4+3] = (TYPE) rgba[i][ACOMP]; \
176 } \
177 break; \
178 case GL_ABGR_EXT: \
179 for (i=0;i<n;i++) { \
180 dst[i*4+0] = (TYPE) rgba[i][ACOMP]; \
181 dst[i*4+1] = (TYPE) rgba[i][BCOMP]; \
182 dst[i*4+2] = (TYPE) rgba[i][GCOMP]; \
183 dst[i*4+3] = (TYPE) rgba[i][RCOMP]; \
184 } \
185 break; \
186 default: \
187 _mesa_problem(ctx, "bad format in pack_histogram"); \
188 } \
189 }
190
191 switch (type) {
192 case GL_UNSIGNED_BYTE:
193 {
194 GLubyte *dst = (GLubyte *) destination;
195 PACK_MACRO(GLubyte);
196 }
197 break;
198 case GL_BYTE:
199 {
200 GLbyte *dst = (GLbyte *) destination;
201 PACK_MACRO(GLbyte);
202 }
203 break;
204 case GL_UNSIGNED_SHORT:
205 {
206 GLushort *dst = (GLushort *) destination;
207 PACK_MACRO(GLushort);
208 if (packing->SwapBytes) {
209 _mesa_swap2(dst, n * comps);
210 }
211 }
212 break;
213 case GL_SHORT:
214 {
215 GLshort *dst = (GLshort *) destination;
216 PACK_MACRO(GLshort);
217 if (packing->SwapBytes) {
218 _mesa_swap2((GLushort *) dst, n * comps);
219 }
220 }
221 break;
222 case GL_UNSIGNED_INT:
223 {
224 GLuint *dst = (GLuint *) destination;
225 PACK_MACRO(GLuint);
226 if (packing->SwapBytes) {
227 _mesa_swap4(dst, n * comps);
228 }
229 }
230 break;
231 case GL_INT:
232 {
233 GLint *dst = (GLint *) destination;
234 PACK_MACRO(GLint);
235 if (packing->SwapBytes) {
236 _mesa_swap4((GLuint *) dst, n * comps);
237 }
238 }
239 break;
240 case GL_FLOAT:
241 {
242 GLfloat *dst = (GLfloat *) destination;
243 PACK_MACRO(GLfloat);
244 if (packing->SwapBytes) {
245 _mesa_swap4((GLuint *) dst, n * comps);
246 }
247 }
248 break;
249 case GL_HALF_FLOAT_ARB:
250 {
251 /* temporarily store as GLuints */
252 GLuint temp[4*HISTOGRAM_TABLE_SIZE];
253 GLhalfARB *dst = (GLhalfARB *) destination;
254 GLuint i;
255 /* get GLuint values */
256 PACK_MACRO(GLuint);
257 /* convert to GLhalf */
258 for (i = 0; i < n * comps; i++) {
259 dst[i] = _mesa_float_to_half((GLfloat) temp[i]);
260 }
261 if (packing->SwapBytes) {
262 _mesa_swap2((GLushort *) dst, n * comps);
263 }
264 }
265 break;
266 case GL_UNSIGNED_BYTE_3_3_2:
267 if (format == GL_RGB) {
268 GLubyte *dst = (GLubyte *) destination;
269 GLuint i;
270 for (i = 0; i < n; i++) {
271 dst[i] = ((rgba[i][RCOMP] & 0x7) << 5)
272 | ((rgba[i][GCOMP] & 0x7) << 2)
273 | ((rgba[i][BCOMP] & 0x3) );
274 }
275 }
276 else {
277 GLubyte *dst = (GLubyte *) destination;
278 GLuint i;
279 ASSERT(format == GL_BGR);
280 for (i = 0; i < n; i++) {
281 dst[i] = ((rgba[i][BCOMP] & 0x7) << 5)
282 | ((rgba[i][GCOMP] & 0x7) << 2)
283 | ((rgba[i][RCOMP] & 0x3) );
284 }
285 }
286 break;
287 case GL_UNSIGNED_BYTE_2_3_3_REV:
288 if (format == GL_RGB) {
289 GLubyte *dst = (GLubyte *) destination;
290 GLuint i;
291 for (i = 0; i < n; i++) {
292 dst[i] = ((rgba[i][RCOMP] & 0x3) << 6)
293 | ((rgba[i][GCOMP] & 0x7) << 3)
294 | ((rgba[i][BCOMP] & 0x7) );
295 }
296 }
297 else {
298 GLubyte *dst = (GLubyte *) destination;
299 GLuint i;
300 ASSERT(format == GL_BGR);
301 for (i = 0; i < n; i++) {
302 dst[i] = ((rgba[i][BCOMP] & 0x3) << 6)
303 | ((rgba[i][GCOMP] & 0x7) << 3)
304 | ((rgba[i][RCOMP] & 0x7) );
305 }
306 }
307 break;
308 case GL_UNSIGNED_SHORT_5_6_5:
309 if (format == GL_RGB) {
310 GLushort *dst = (GLushort *) destination;
311 GLuint i;
312 for (i = 0; i < n; i++) {
313 dst[i] = ((rgba[i][RCOMP] & 0x1f) << 11)
314 | ((rgba[i][GCOMP] & 0x3f) << 5)
315 | ((rgba[i][BCOMP] & 0x1f) );
316 }
317 }
318 else {
319 GLushort *dst = (GLushort *) destination;
320 GLuint i;
321 ASSERT(format == GL_BGR);
322 for (i = 0; i < n; i++) {
323 dst[i] = ((rgba[i][BCOMP] & 0x1f) << 11)
324 | ((rgba[i][GCOMP] & 0x3f) << 5)
325 | ((rgba[i][RCOMP] & 0x1f) );
326 }
327 }
328 break;
329 case GL_UNSIGNED_SHORT_5_6_5_REV:
330 if (format == GL_RGB) {
331 GLushort *dst = (GLushort *) destination;
332 GLuint i;
333 for (i = 0; i < n; i++) {
334 dst[i] = ((rgba[i][BCOMP] & 0x1f) << 11)
335 | ((rgba[i][GCOMP] & 0x3f) << 5)
336 | ((rgba[i][RCOMP] & 0x1f) );
337 }
338 }
339 else {
340 GLushort *dst = (GLushort *) destination;
341 GLuint i;
342 ASSERT(format == GL_BGR);
343 for (i = 0; i < n; i++) {
344 dst[i] = ((rgba[i][RCOMP] & 0x1f) << 11)
345 | ((rgba[i][GCOMP] & 0x3f) << 5)
346 | ((rgba[i][BCOMP] & 0x1f) );
347 }
348 }
349 break;
350 case GL_UNSIGNED_SHORT_4_4_4_4:
351 if (format == GL_RGBA) {
352 GLushort *dst = (GLushort *) destination;
353 GLuint i;
354 for (i = 0; i < n; i++) {
355 dst[i] = ((rgba[i][RCOMP] & 0xf) << 12)
356 | ((rgba[i][GCOMP] & 0xf) << 8)
357 | ((rgba[i][BCOMP] & 0xf) << 4)
358 | ((rgba[i][ACOMP] & 0xf) );
359 }
360 }
361 else if (format == GL_BGRA) {
362 GLushort *dst = (GLushort *) destination;
363 GLuint i;
364 for (i = 0; i < n; i++) {
365 dst[i] = ((rgba[i][BCOMP] & 0xf) << 12)
366 | ((rgba[i][GCOMP] & 0xf) << 8)
367 | ((rgba[i][RCOMP] & 0xf) << 4)
368 | ((rgba[i][ACOMP] & 0xf) );
369 }
370 }
371 else {
372 GLushort *dst = (GLushort *) destination;
373 GLuint i;
374 ASSERT(format == GL_ABGR_EXT);
375 for (i = 0; i < n; i++) {
376 dst[i] = ((rgba[i][ACOMP] & 0xf) << 12)
377 | ((rgba[i][BCOMP] & 0xf) << 8)
378 | ((rgba[i][GCOMP] & 0xf) << 4)
379 | ((rgba[i][RCOMP] & 0xf) );
380 }
381 }
382 break;
383 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
384 if (format == GL_RGBA) {
385 GLushort *dst = (GLushort *) destination;
386 GLuint i;
387 for (i = 0; i < n; i++) {
388 dst[i] = ((rgba[i][ACOMP] & 0xf) << 12)
389 | ((rgba[i][BCOMP] & 0xf) << 8)
390 | ((rgba[i][GCOMP] & 0xf) << 4)
391 | ((rgba[i][RCOMP] & 0xf) );
392 }
393 }
394 else if (format == GL_BGRA) {
395 GLushort *dst = (GLushort *) destination;
396 GLuint i;
397 for (i = 0; i < n; i++) {
398 dst[i] = ((rgba[i][ACOMP] & 0xf) << 12)
399 | ((rgba[i][RCOMP] & 0xf) << 8)
400 | ((rgba[i][GCOMP] & 0xf) << 4)
401 | ((rgba[i][BCOMP] & 0xf) );
402 }
403 }
404 else {
405 GLushort *dst = (GLushort *) destination;
406 GLuint i;
407 ASSERT(format == GL_ABGR_EXT);
408 for (i = 0; i < n; i++) {
409 dst[i] = ((rgba[i][RCOMP] & 0xf) << 12)
410 | ((rgba[i][GCOMP] & 0xf) << 8)
411 | ((rgba[i][BCOMP] & 0xf) << 4)
412 | ((rgba[i][ACOMP] & 0xf) );
413 }
414 }
415 break;
416 case GL_UNSIGNED_SHORT_5_5_5_1:
417 if (format == GL_RGBA) {
418 GLushort *dst = (GLushort *) destination;
419 GLuint i;
420 for (i = 0; i < n; i++) {
421 dst[i] = ((rgba[i][RCOMP] & 0x1f) << 11)
422 | ((rgba[i][GCOMP] & 0x1f) << 6)
423 | ((rgba[i][BCOMP] & 0x1f) << 1)
424 | ((rgba[i][ACOMP] & 0x1) );
425 }
426 }
427 else if (format == GL_BGRA) {
428 GLushort *dst = (GLushort *) destination;
429 GLuint i;
430 for (i = 0; i < n; i++) {
431 dst[i] = ((rgba[i][BCOMP] & 0x1f) << 11)
432 | ((rgba[i][GCOMP] & 0x1f) << 6)
433 | ((rgba[i][RCOMP] & 0x1f) << 1)
434 | ((rgba[i][ACOMP] & 0x1) );
435 }
436 }
437 else {
438 GLushort *dst = (GLushort *) destination;
439 GLuint i;
440 ASSERT(format == GL_ABGR_EXT);
441 for (i = 0; i < n; i++) {
442 dst[i] = ((rgba[i][ACOMP] & 0x1f) << 11)
443 | ((rgba[i][BCOMP] & 0x1f) << 6)
444 | ((rgba[i][GCOMP] & 0x1f) << 1)
445 | ((rgba[i][RCOMP] & 0x1) );
446 }
447 }
448 break;
449 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
450 if (format == GL_RGBA) {
451 GLushort *dst = (GLushort *) destination;
452 GLuint i;
453 for (i = 0; i < n; i++) {
454 dst[i] = ((rgba[i][ACOMP] & 0x1f) << 11)
455 | ((rgba[i][BCOMP] & 0x1f) << 6)
456 | ((rgba[i][GCOMP] & 0x1f) << 1)
457 | ((rgba[i][RCOMP] & 0x1) );
458 }
459 }
460 else if (format == GL_BGRA) {
461 GLushort *dst = (GLushort *) destination;
462 GLuint i;
463 for (i = 0; i < n; i++) {
464 dst[i] = ((rgba[i][ACOMP] & 0x1f) << 11)
465 | ((rgba[i][RCOMP] & 0x1f) << 6)
466 | ((rgba[i][GCOMP] & 0x1f) << 1)
467 | ((rgba[i][BCOMP] & 0x1) );
468 }
469 }
470 else {
471 GLushort *dst = (GLushort *) destination;
472 GLuint i;
473 ASSERT(format == GL_ABGR_EXT);
474 for (i = 0; i < n; i++) {
475 dst[i] = ((rgba[i][RCOMP] & 0x1f) << 11)
476 | ((rgba[i][GCOMP] & 0x1f) << 6)
477 | ((rgba[i][BCOMP] & 0x1f) << 1)
478 | ((rgba[i][ACOMP] & 0x1) );
479 }
480 }
481 break;
482 case GL_UNSIGNED_INT_8_8_8_8:
483 if (format == GL_RGBA) {
484 GLuint *dst = (GLuint *) destination;
485 GLuint i;
486 for (i = 0; i < n; i++) {
487 dst[i] = ((rgba[i][RCOMP] & 0xff) << 24)
488 | ((rgba[i][GCOMP] & 0xff) << 16)
489 | ((rgba[i][BCOMP] & 0xff) << 8)
490 | ((rgba[i][ACOMP] & 0xff) );
491 }
492 }
493 else if (format == GL_BGRA) {
494 GLuint *dst = (GLuint *) destination;
495 GLuint i;
496 for (i = 0; i < n; i++) {
497 dst[i] = ((rgba[i][BCOMP] & 0xff) << 24)
498 | ((rgba[i][GCOMP] & 0xff) << 16)
499 | ((rgba[i][RCOMP] & 0xff) << 8)
500 | ((rgba[i][ACOMP] & 0xff) );
501 }
502 }
503 else {
504 GLuint *dst = (GLuint *) destination;
505 GLuint i;
506 ASSERT(format == GL_ABGR_EXT);
507 for (i = 0; i < n; i++) {
508 dst[i] = ((rgba[i][ACOMP] & 0xff) << 24)
509 | ((rgba[i][BCOMP] & 0xff) << 16)
510 | ((rgba[i][GCOMP] & 0xff) << 8)
511 | ((rgba[i][RCOMP] & 0xff) );
512 }
513 }
514 break;
515 case GL_UNSIGNED_INT_8_8_8_8_REV:
516 if (format == GL_RGBA) {
517 GLuint *dst = (GLuint *) destination;
518 GLuint i;
519 for (i = 0; i < n; i++) {
520 dst[i] = ((rgba[i][ACOMP] & 0xff) << 24)
521 | ((rgba[i][BCOMP] & 0xff) << 16)
522 | ((rgba[i][GCOMP] & 0xff) << 8)
523 | ((rgba[i][RCOMP] & 0xff) );
524 }
525 }
526 else if (format == GL_BGRA) {
527 GLuint *dst = (GLuint *) destination;
528 GLuint i;
529 for (i = 0; i < n; i++) {
530 dst[i] = ((rgba[i][ACOMP] & 0xff) << 24)
531 | ((rgba[i][RCOMP] & 0xff) << 16)
532 | ((rgba[i][GCOMP] & 0xff) << 8)
533 | ((rgba[i][BCOMP] & 0xff) );
534 }
535 }
536 else {
537 GLuint *dst = (GLuint *) destination;
538 GLuint i;
539 ASSERT(format == GL_ABGR_EXT);
540 for (i = 0; i < n; i++) {
541 dst[i] = ((rgba[i][RCOMP] & 0xff) << 24)
542 | ((rgba[i][GCOMP] & 0xff) << 16)
543 | ((rgba[i][BCOMP] & 0xff) << 8)
544 | ((rgba[i][ACOMP] & 0xff) );
545 }
546 }
547 break;
548 case GL_UNSIGNED_INT_10_10_10_2:
549 if (format == GL_RGBA) {
550 GLuint *dst = (GLuint *) destination;
551 GLuint i;
552 for (i = 0; i < n; i++) {
553 dst[i] = ((rgba[i][RCOMP] & 0x3ff) << 22)
554 | ((rgba[i][GCOMP] & 0x3ff) << 12)
555 | ((rgba[i][BCOMP] & 0x3ff) << 2)
556 | ((rgba[i][ACOMP] & 0x3) );
557 }
558 }
559 else if (format == GL_BGRA) {
560 GLuint *dst = (GLuint *) destination;
561 GLuint i;
562 for (i = 0; i < n; i++) {
563 dst[i] = ((rgba[i][BCOMP] & 0x3ff) << 22)
564 | ((rgba[i][GCOMP] & 0x3ff) << 12)
565 | ((rgba[i][RCOMP] & 0x3ff) << 2)
566 | ((rgba[i][ACOMP] & 0x3) );
567 }
568 }
569 else {
570 GLuint *dst = (GLuint *) destination;
571 GLuint i;
572 ASSERT(format == GL_ABGR_EXT);
573 for (i = 0; i < n; i++) {
574 dst[i] = ((rgba[i][ACOMP] & 0x3ff) << 22)
575 | ((rgba[i][BCOMP] & 0x3ff) << 12)
576 | ((rgba[i][GCOMP] & 0x3ff) << 2)
577 | ((rgba[i][RCOMP] & 0x3) );
578 }
579 }
580 break;
581 case GL_UNSIGNED_INT_2_10_10_10_REV:
582 if (format == GL_RGBA) {
583 GLuint *dst = (GLuint *) destination;
584 GLuint i;
585 for (i = 0; i < n; i++) {
586 dst[i] = ((rgba[i][ACOMP] & 0x3ff) << 22)
587 | ((rgba[i][BCOMP] & 0x3ff) << 12)
588 | ((rgba[i][GCOMP] & 0x3ff) << 2)
589 | ((rgba[i][RCOMP] & 0x3) );
590 }
591 }
592 else if (format == GL_BGRA) {
593 GLuint *dst = (GLuint *) destination;
594 GLuint i;
595 for (i = 0; i < n; i++) {
596 dst[i] = ((rgba[i][ACOMP] & 0x3ff) << 22)
597 | ((rgba[i][RCOMP] & 0x3ff) << 12)
598 | ((rgba[i][GCOMP] & 0x3ff) << 2)
599 | ((rgba[i][BCOMP] & 0x3) );
600 }
601 }
602 else {
603 GLuint *dst = (GLuint *) destination;
604 GLuint i;
605 ASSERT(format == GL_ABGR_EXT);
606 for (i = 0; i < n; i++) {
607 dst[i] = ((rgba[i][RCOMP] & 0x3ff) << 22)
608 | ((rgba[i][GCOMP] & 0x3ff) << 12)
609 | ((rgba[i][BCOMP] & 0x3ff) << 2)
610 | ((rgba[i][ACOMP] & 0x3) );
611 }
612 }
613 break;
614 default:
615 _mesa_problem(ctx, "Bad type in pack_histogram");
616 }
617
618 #undef PACK_MACRO
619 }
620
621
622 /*
623 * Given an internalFormat token passed to glHistogram or glMinMax,
624 * return the corresponding base format.
625 * Return -1 if invalid token.
626 */
627 static GLint
628 base_histogram_format( GLenum format )
629 {
630 switch (format) {
631 case GL_ALPHA:
632 case GL_ALPHA4:
633 case GL_ALPHA8:
634 case GL_ALPHA12:
635 case GL_ALPHA16:
636 return GL_ALPHA;
637 case GL_LUMINANCE:
638 case GL_LUMINANCE4:
639 case GL_LUMINANCE8:
640 case GL_LUMINANCE12:
641 case GL_LUMINANCE16:
642 return GL_LUMINANCE;
643 case GL_LUMINANCE_ALPHA:
644 case GL_LUMINANCE4_ALPHA4:
645 case GL_LUMINANCE6_ALPHA2:
646 case GL_LUMINANCE8_ALPHA8:
647 case GL_LUMINANCE12_ALPHA4:
648 case GL_LUMINANCE12_ALPHA12:
649 case GL_LUMINANCE16_ALPHA16:
650 return GL_LUMINANCE_ALPHA;
651 case GL_RGB:
652 case GL_R3_G3_B2:
653 case GL_RGB4:
654 case GL_RGB5:
655 case GL_RGB8:
656 case GL_RGB10:
657 case GL_RGB12:
658 case GL_RGB16:
659 return GL_RGB;
660 case GL_RGBA:
661 case GL_RGBA2:
662 case GL_RGBA4:
663 case GL_RGB5_A1:
664 case GL_RGBA8:
665 case GL_RGB10_A2:
666 case GL_RGBA12:
667 case GL_RGBA16:
668 return GL_RGBA;
669 default:
670 return -1; /* error */
671 }
672 }
673
674
675
676 /**********************************************************************
677 * API functions
678 */
679
680
681 void GLAPIENTRY
682 _mesa_GetMinmax(GLenum target, GLboolean reset, GLenum format, GLenum type, GLvoid *values)
683 {
684 GET_CURRENT_CONTEXT(ctx);
685 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
686
687 if (!ctx->Extensions.EXT_histogram && !ctx->Extensions.ARB_imaging) {
688 _mesa_error(ctx, GL_INVALID_OPERATION, "glGetMinmax");
689 return;
690 }
691
692 if (target != GL_MINMAX) {
693 _mesa_error(ctx, GL_INVALID_ENUM, "glGetMinmax(target)");
694 return;
695 }
696
697 if (format != GL_RED &&
698 format != GL_GREEN &&
699 format != GL_BLUE &&
700 format != GL_ALPHA &&
701 format != GL_RGB &&
702 format != GL_BGR &&
703 format != GL_RGBA &&
704 format != GL_BGRA &&
705 format != GL_ABGR_EXT &&
706 format != GL_LUMINANCE &&
707 format != GL_LUMINANCE_ALPHA) {
708 _mesa_error(ctx, GL_INVALID_ENUM, "glGetHistogram(format)");
709 }
710
711 if (!_mesa_is_legal_format_and_type(ctx, format, type)) {
712 _mesa_error(ctx, GL_INVALID_OPERATION, "glGetMinmax(format or type)");
713 return;
714 }
715
716 if (!values)
717 return;
718
719 {
720 GLfloat minmax[2][4];
721 minmax[0][RCOMP] = CLAMP(ctx->MinMax.Min[RCOMP], 0.0F, 1.0F);
722 minmax[0][GCOMP] = CLAMP(ctx->MinMax.Min[GCOMP], 0.0F, 1.0F);
723 minmax[0][BCOMP] = CLAMP(ctx->MinMax.Min[BCOMP], 0.0F, 1.0F);
724 minmax[0][ACOMP] = CLAMP(ctx->MinMax.Min[ACOMP], 0.0F, 1.0F);
725 minmax[1][RCOMP] = CLAMP(ctx->MinMax.Max[RCOMP], 0.0F, 1.0F);
726 minmax[1][GCOMP] = CLAMP(ctx->MinMax.Max[GCOMP], 0.0F, 1.0F);
727 minmax[1][BCOMP] = CLAMP(ctx->MinMax.Max[BCOMP], 0.0F, 1.0F);
728 minmax[1][ACOMP] = CLAMP(ctx->MinMax.Max[ACOMP], 0.0F, 1.0F);
729 _mesa_pack_rgba_span_float(ctx, 2, (CONST GLfloat (*)[4]) minmax,
730 format, type, values, &ctx->Pack, 0);
731 }
732
733 if (reset) {
734 _mesa_ResetMinmax(GL_MINMAX);
735 }
736 }
737
738
739 void GLAPIENTRY
740 _mesa_GetHistogram(GLenum target, GLboolean reset, GLenum format, GLenum type, GLvoid *values)
741 {
742 GET_CURRENT_CONTEXT(ctx);
743 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
744
745 if (!ctx->Extensions.EXT_histogram && !ctx->Extensions.ARB_imaging) {
746 _mesa_error(ctx, GL_INVALID_OPERATION, "glGetHistogram");
747 return;
748 }
749
750 if (target != GL_HISTOGRAM) {
751 _mesa_error(ctx, GL_INVALID_ENUM, "glGetHistogram(target)");
752 return;
753 }
754
755 if (format != GL_RED &&
756 format != GL_GREEN &&
757 format != GL_BLUE &&
758 format != GL_ALPHA &&
759 format != GL_RGB &&
760 format != GL_BGR &&
761 format != GL_RGBA &&
762 format != GL_BGRA &&
763 format != GL_ABGR_EXT &&
764 format != GL_LUMINANCE &&
765 format != GL_LUMINANCE_ALPHA) {
766 _mesa_error(ctx, GL_INVALID_ENUM, "glGetHistogram(format)");
767 }
768
769 if (!_mesa_is_legal_format_and_type(ctx, format, type)) {
770 _mesa_error(ctx, GL_INVALID_OPERATION, "glGetHistogram(format or type)");
771 return;
772 }
773
774 if (!values)
775 return;
776
777 pack_histogram(ctx, ctx->Histogram.Width,
778 (CONST GLuint (*)[4]) ctx->Histogram.Count,
779 format, type, values, &ctx->Pack);
780
781 if (reset) {
782 GLuint i;
783 for (i = 0; i < HISTOGRAM_TABLE_SIZE; i++) {
784 ctx->Histogram.Count[i][0] = 0;
785 ctx->Histogram.Count[i][1] = 0;
786 ctx->Histogram.Count[i][2] = 0;
787 ctx->Histogram.Count[i][3] = 0;
788 }
789 }
790 }
791
792
793 void GLAPIENTRY
794 _mesa_GetHistogramParameterfv(GLenum target, GLenum pname, GLfloat *params)
795 {
796 GET_CURRENT_CONTEXT(ctx);
797 ASSERT_OUTSIDE_BEGIN_END(ctx);
798
799 if (!ctx->Extensions.EXT_histogram && !ctx->Extensions.ARB_imaging) {
800 _mesa_error(ctx, GL_INVALID_OPERATION, "glGetHistogramParameterfv");
801 return;
802 }
803
804 if (target != GL_HISTOGRAM && target != GL_PROXY_HISTOGRAM) {
805 _mesa_error(ctx, GL_INVALID_ENUM, "glGetHistogramParameterfv(target)");
806 return;
807 }
808
809 switch (pname) {
810 case GL_HISTOGRAM_WIDTH:
811 *params = (GLfloat) ctx->Histogram.Width;
812 break;
813 case GL_HISTOGRAM_FORMAT:
814 *params = (GLfloat) ctx->Histogram.Format;
815 break;
816 case GL_HISTOGRAM_RED_SIZE:
817 *params = (GLfloat) ctx->Histogram.RedSize;
818 break;
819 case GL_HISTOGRAM_GREEN_SIZE:
820 *params = (GLfloat) ctx->Histogram.GreenSize;
821 break;
822 case GL_HISTOGRAM_BLUE_SIZE:
823 *params = (GLfloat) ctx->Histogram.BlueSize;
824 break;
825 case GL_HISTOGRAM_ALPHA_SIZE:
826 *params = (GLfloat) ctx->Histogram.AlphaSize;
827 break;
828 case GL_HISTOGRAM_LUMINANCE_SIZE:
829 *params = (GLfloat) ctx->Histogram.LuminanceSize;
830 break;
831 case GL_HISTOGRAM_SINK:
832 *params = (GLfloat) ctx->Histogram.Sink;
833 break;
834 default:
835 _mesa_error(ctx, GL_INVALID_ENUM, "glGetHistogramParameterfv(pname)");
836 }
837 }
838
839
840 void GLAPIENTRY
841 _mesa_GetHistogramParameteriv(GLenum target, GLenum pname, GLint *params)
842 {
843 GET_CURRENT_CONTEXT(ctx);
844 ASSERT_OUTSIDE_BEGIN_END(ctx);
845
846 if (!ctx->Extensions.EXT_histogram && !ctx->Extensions.ARB_imaging) {
847 _mesa_error(ctx, GL_INVALID_OPERATION, "glGetHistogramParameteriv");
848 return;
849 }
850
851 if (target != GL_HISTOGRAM && target != GL_PROXY_HISTOGRAM) {
852 _mesa_error(ctx, GL_INVALID_ENUM, "glGetHistogramParameteriv(target)");
853 return;
854 }
855
856 switch (pname) {
857 case GL_HISTOGRAM_WIDTH:
858 *params = (GLint) ctx->Histogram.Width;
859 break;
860 case GL_HISTOGRAM_FORMAT:
861 *params = (GLint) ctx->Histogram.Format;
862 break;
863 case GL_HISTOGRAM_RED_SIZE:
864 *params = (GLint) ctx->Histogram.RedSize;
865 break;
866 case GL_HISTOGRAM_GREEN_SIZE:
867 *params = (GLint) ctx->Histogram.GreenSize;
868 break;
869 case GL_HISTOGRAM_BLUE_SIZE:
870 *params = (GLint) ctx->Histogram.BlueSize;
871 break;
872 case GL_HISTOGRAM_ALPHA_SIZE:
873 *params = (GLint) ctx->Histogram.AlphaSize;
874 break;
875 case GL_HISTOGRAM_LUMINANCE_SIZE:
876 *params = (GLint) ctx->Histogram.LuminanceSize;
877 break;
878 case GL_HISTOGRAM_SINK:
879 *params = (GLint) ctx->Histogram.Sink;
880 break;
881 default:
882 _mesa_error(ctx, GL_INVALID_ENUM, "glGetHistogramParameteriv(pname)");
883 }
884 }
885
886
887 void GLAPIENTRY
888 _mesa_GetMinmaxParameterfv(GLenum target, GLenum pname, GLfloat *params)
889 {
890 GET_CURRENT_CONTEXT(ctx);
891 ASSERT_OUTSIDE_BEGIN_END(ctx);
892
893 if (!ctx->Extensions.EXT_histogram && !ctx->Extensions.ARB_imaging) {
894 _mesa_error(ctx, GL_INVALID_OPERATION, "glGetMinmaxParameterfv");
895 return;
896 }
897 if (target != GL_MINMAX) {
898 _mesa_error(ctx, GL_INVALID_ENUM, "glGetMinmaxParameterfv(target)");
899 return;
900 }
901 if (pname == GL_MINMAX_FORMAT) {
902 *params = (GLfloat) ctx->MinMax.Format;
903 }
904 else if (pname == GL_MINMAX_SINK) {
905 *params = (GLfloat) ctx->MinMax.Sink;
906 }
907 else {
908 _mesa_error(ctx, GL_INVALID_ENUM, "glGetMinMaxParameterfv(pname)");
909 }
910 }
911
912
913 void GLAPIENTRY
914 _mesa_GetMinmaxParameteriv(GLenum target, GLenum pname, GLint *params)
915 {
916 GET_CURRENT_CONTEXT(ctx);
917 ASSERT_OUTSIDE_BEGIN_END(ctx);
918
919 if (!ctx->Extensions.EXT_histogram && !ctx->Extensions.ARB_imaging) {
920 _mesa_error(ctx, GL_INVALID_OPERATION, "glGetMinmaxParameteriv");
921 return;
922 }
923 if (target != GL_MINMAX) {
924 _mesa_error(ctx, GL_INVALID_ENUM, "glGetMinmaxParameteriv(target)");
925 return;
926 }
927 if (pname == GL_MINMAX_FORMAT) {
928 *params = (GLint) ctx->MinMax.Format;
929 }
930 else if (pname == GL_MINMAX_SINK) {
931 *params = (GLint) ctx->MinMax.Sink;
932 }
933 else {
934 _mesa_error(ctx, GL_INVALID_ENUM, "glGetMinMaxParameteriv(pname)");
935 }
936 }
937
938
939 void GLAPIENTRY
940 _mesa_Histogram(GLenum target, GLsizei width, GLenum internalFormat, GLboolean sink)
941 {
942 GLuint i;
943 GLboolean error = GL_FALSE;
944 GET_CURRENT_CONTEXT(ctx);
945 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); /* sideeffects */
946
947 if (!ctx->Extensions.EXT_histogram && !ctx->Extensions.ARB_imaging) {
948 _mesa_error(ctx, GL_INVALID_OPERATION, "glHistogram");
949 return;
950 }
951
952 if (target != GL_HISTOGRAM && target != GL_PROXY_HISTOGRAM) {
953 _mesa_error(ctx, GL_INVALID_ENUM, "glHistogram(target)");
954 return;
955 }
956
957 if (width < 0 || width > HISTOGRAM_TABLE_SIZE) {
958 if (target == GL_PROXY_HISTOGRAM) {
959 error = GL_TRUE;
960 }
961 else {
962 if (width < 0)
963 _mesa_error(ctx, GL_INVALID_VALUE, "glHistogram(width)");
964 else
965 _mesa_error(ctx, GL_TABLE_TOO_LARGE, "glHistogram(width)");
966 return;
967 }
968 }
969
970 if (width != 0 && _mesa_bitcount(width) != 1) {
971 if (target == GL_PROXY_HISTOGRAM) {
972 error = GL_TRUE;
973 }
974 else {
975 _mesa_error(ctx, GL_INVALID_VALUE, "glHistogram(width)");
976 return;
977 }
978 }
979
980 if (base_histogram_format(internalFormat) < 0) {
981 if (target == GL_PROXY_HISTOGRAM) {
982 error = GL_TRUE;
983 }
984 else {
985 _mesa_error(ctx, GL_INVALID_ENUM, "glHistogram(internalFormat)");
986 return;
987 }
988 }
989
990 /* reset histograms */
991 for (i = 0; i < HISTOGRAM_TABLE_SIZE; i++) {
992 ctx->Histogram.Count[i][0] = 0;
993 ctx->Histogram.Count[i][1] = 0;
994 ctx->Histogram.Count[i][2] = 0;
995 ctx->Histogram.Count[i][3] = 0;
996 }
997
998 if (error) {
999 ctx->Histogram.Width = 0;
1000 ctx->Histogram.Format = 0;
1001 ctx->Histogram.RedSize = 0;
1002 ctx->Histogram.GreenSize = 0;
1003 ctx->Histogram.BlueSize = 0;
1004 ctx->Histogram.AlphaSize = 0;
1005 ctx->Histogram.LuminanceSize = 0;
1006 }
1007 else {
1008 ctx->Histogram.Width = width;
1009 ctx->Histogram.Format = internalFormat;
1010 ctx->Histogram.Sink = sink;
1011 ctx->Histogram.RedSize = 8 * sizeof(GLuint);
1012 ctx->Histogram.GreenSize = 8 * sizeof(GLuint);
1013 ctx->Histogram.BlueSize = 8 * sizeof(GLuint);
1014 ctx->Histogram.AlphaSize = 8 * sizeof(GLuint);
1015 ctx->Histogram.LuminanceSize = 8 * sizeof(GLuint);
1016 }
1017
1018 ctx->NewState |= _NEW_PIXEL;
1019 }
1020
1021
1022 void GLAPIENTRY
1023 _mesa_Minmax(GLenum target, GLenum internalFormat, GLboolean sink)
1024 {
1025 GET_CURRENT_CONTEXT(ctx);
1026 ASSERT_OUTSIDE_BEGIN_END(ctx);
1027
1028 if (!ctx->Extensions.EXT_histogram && !ctx->Extensions.ARB_imaging) {
1029 _mesa_error(ctx, GL_INVALID_OPERATION, "glMinmax");
1030 return;
1031 }
1032
1033 if (target != GL_MINMAX) {
1034 _mesa_error(ctx, GL_INVALID_ENUM, "glMinMax(target)");
1035 return;
1036 }
1037
1038 if (base_histogram_format(internalFormat) < 0) {
1039 _mesa_error(ctx, GL_INVALID_ENUM, "glMinMax(internalFormat)");
1040 return;
1041 }
1042
1043 if (ctx->MinMax.Sink == sink)
1044 return;
1045 FLUSH_VERTICES(ctx, _NEW_PIXEL);
1046 ctx->MinMax.Sink = sink;
1047 }
1048
1049
1050 void GLAPIENTRY
1051 _mesa_ResetHistogram(GLenum target)
1052 {
1053 GLuint i;
1054 GET_CURRENT_CONTEXT(ctx);
1055 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); /* sideeffects */
1056
1057 if (!ctx->Extensions.EXT_histogram && !ctx->Extensions.ARB_imaging) {
1058 _mesa_error(ctx, GL_INVALID_OPERATION, "glResetHistogram");
1059 return;
1060 }
1061
1062 if (target != GL_HISTOGRAM) {
1063 _mesa_error(ctx, GL_INVALID_ENUM, "glResetHistogram(target)");
1064 return;
1065 }
1066
1067 for (i = 0; i < HISTOGRAM_TABLE_SIZE; i++) {
1068 ctx->Histogram.Count[i][0] = 0;
1069 ctx->Histogram.Count[i][1] = 0;
1070 ctx->Histogram.Count[i][2] = 0;
1071 ctx->Histogram.Count[i][3] = 0;
1072 }
1073
1074 ctx->NewState |= _NEW_PIXEL;
1075 }
1076
1077
1078 void GLAPIENTRY
1079 _mesa_ResetMinmax(GLenum target)
1080 {
1081 GET_CURRENT_CONTEXT(ctx);
1082 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
1083
1084 if (!ctx->Extensions.EXT_histogram && !ctx->Extensions.ARB_imaging) {
1085 _mesa_error(ctx, GL_INVALID_OPERATION, "glResetMinmax");
1086 return;
1087 }
1088
1089 if (target != GL_MINMAX) {
1090 _mesa_error(ctx, GL_INVALID_ENUM, "glResetMinMax(target)");
1091 return;
1092 }
1093
1094 ctx->MinMax.Min[RCOMP] = 1000; ctx->MinMax.Max[RCOMP] = -1000;
1095 ctx->MinMax.Min[GCOMP] = 1000; ctx->MinMax.Max[GCOMP] = -1000;
1096 ctx->MinMax.Min[BCOMP] = 1000; ctx->MinMax.Max[BCOMP] = -1000;
1097 ctx->MinMax.Min[ACOMP] = 1000; ctx->MinMax.Max[ACOMP] = -1000;
1098 ctx->NewState |= _NEW_PIXEL;
1099 }
1100
1101
1102
1103 /**********************************************************************/
1104 /***** Initialization *****/
1105 /**********************************************************************/
1106
1107 void _mesa_init_histogram( GLcontext * ctx )
1108 {
1109 int i;
1110
1111 /* Histogram group */
1112 ctx->Histogram.Width = 0;
1113 ctx->Histogram.Format = GL_RGBA;
1114 ctx->Histogram.Sink = GL_FALSE;
1115 ctx->Histogram.RedSize = 0;
1116 ctx->Histogram.GreenSize = 0;
1117 ctx->Histogram.BlueSize = 0;
1118 ctx->Histogram.AlphaSize = 0;
1119 ctx->Histogram.LuminanceSize = 0;
1120 for (i = 0; i < HISTOGRAM_TABLE_SIZE; i++) {
1121 ctx->Histogram.Count[i][0] = 0;
1122 ctx->Histogram.Count[i][1] = 0;
1123 ctx->Histogram.Count[i][2] = 0;
1124 ctx->Histogram.Count[i][3] = 0;
1125 }
1126
1127 /* Min/Max group */
1128 ctx->MinMax.Format = GL_RGBA;
1129 ctx->MinMax.Sink = GL_FALSE;
1130 ctx->MinMax.Min[RCOMP] = 1000; ctx->MinMax.Max[RCOMP] = -1000;
1131 ctx->MinMax.Min[GCOMP] = 1000; ctx->MinMax.Max[GCOMP] = -1000;
1132 ctx->MinMax.Min[BCOMP] = 1000; ctx->MinMax.Max[BCOMP] = -1000;
1133 ctx->MinMax.Min[ACOMP] = 1000; ctx->MinMax.Max[ACOMP] = -1000;
1134 }