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mesa/format: add mesa MESA_FORMAT_ARGB2101010_UINT support.
[mesa.git] / src / mesa / main / image.c
1 /*
2 * Mesa 3-D graphics library
3 * Version: 7.5
4 *
5 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
6 * Copyright (C) 2009 VMware, Inc. All Rights Reserved.
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
22 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 */
25
26
27 /**
28 * \file image.c
29 * Image handling.
30 */
31
32
33 #include "glheader.h"
34 #include "colormac.h"
35 #include "image.h"
36 #include "imports.h"
37 #include "macros.h"
38 #include "mfeatures.h"
39 #include "mtypes.h"
40
41
42
43 /**
44 * \return GL_TRUE if type is packed pixel type, GL_FALSE otherwise.
45 */
46 GLboolean
47 _mesa_type_is_packed(GLenum type)
48 {
49 switch (type) {
50 case GL_UNSIGNED_BYTE_3_3_2:
51 case GL_UNSIGNED_BYTE_2_3_3_REV:
52 case MESA_UNSIGNED_BYTE_4_4:
53 case GL_UNSIGNED_SHORT_5_6_5:
54 case GL_UNSIGNED_SHORT_5_6_5_REV:
55 case GL_UNSIGNED_SHORT_4_4_4_4:
56 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
57 case GL_UNSIGNED_SHORT_5_5_5_1:
58 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
59 case GL_UNSIGNED_INT_8_8_8_8:
60 case GL_UNSIGNED_INT_8_8_8_8_REV:
61 case GL_UNSIGNED_INT_10_10_10_2:
62 case GL_UNSIGNED_INT_2_10_10_10_REV:
63 case GL_UNSIGNED_SHORT_8_8_MESA:
64 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
65 case GL_UNSIGNED_INT_24_8_EXT:
66 case GL_UNSIGNED_INT_5_9_9_9_REV:
67 case GL_UNSIGNED_INT_10F_11F_11F_REV:
68 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
69 return GL_TRUE;
70 }
71
72 return GL_FALSE;
73 }
74
75
76
77 /**
78 * Flip the order of the 2 bytes in each word in the given array.
79 *
80 * \param p array.
81 * \param n number of words.
82 */
83 void
84 _mesa_swap2( GLushort *p, GLuint n )
85 {
86 GLuint i;
87 for (i = 0; i < n; i++) {
88 p[i] = (p[i] >> 8) | ((p[i] << 8) & 0xff00);
89 }
90 }
91
92
93
94 /*
95 * Flip the order of the 4 bytes in each word in the given array.
96 */
97 void
98 _mesa_swap4( GLuint *p, GLuint n )
99 {
100 GLuint i, a, b;
101 for (i = 0; i < n; i++) {
102 b = p[i];
103 a = (b >> 24)
104 | ((b >> 8) & 0xff00)
105 | ((b << 8) & 0xff0000)
106 | ((b << 24) & 0xff000000);
107 p[i] = a;
108 }
109 }
110
111
112 /**
113 * Get the size of a GL data type.
114 *
115 * \param type GL data type.
116 *
117 * \return the size, in bytes, of the given data type, 0 if a GL_BITMAP, or -1
118 * if an invalid type enum.
119 */
120 GLint
121 _mesa_sizeof_type( GLenum type )
122 {
123 switch (type) {
124 case GL_BITMAP:
125 return 0;
126 case GL_UNSIGNED_BYTE:
127 return sizeof(GLubyte);
128 case GL_BYTE:
129 return sizeof(GLbyte);
130 case GL_UNSIGNED_SHORT:
131 return sizeof(GLushort);
132 case GL_SHORT:
133 return sizeof(GLshort);
134 case GL_UNSIGNED_INT:
135 return sizeof(GLuint);
136 case GL_INT:
137 return sizeof(GLint);
138 case GL_FLOAT:
139 return sizeof(GLfloat);
140 case GL_DOUBLE:
141 return sizeof(GLdouble);
142 case GL_HALF_FLOAT_ARB:
143 return sizeof(GLhalfARB);
144 case GL_FIXED:
145 return sizeof(GLfixed);
146 default:
147 return -1;
148 }
149 }
150
151
152 /**
153 * Same as _mesa_sizeof_type() but also accepting the packed pixel
154 * format data types.
155 */
156 GLint
157 _mesa_sizeof_packed_type( GLenum type )
158 {
159 switch (type) {
160 case GL_BITMAP:
161 return 0;
162 case GL_UNSIGNED_BYTE:
163 return sizeof(GLubyte);
164 case GL_BYTE:
165 return sizeof(GLbyte);
166 case GL_UNSIGNED_SHORT:
167 return sizeof(GLushort);
168 case GL_SHORT:
169 return sizeof(GLshort);
170 case GL_UNSIGNED_INT:
171 return sizeof(GLuint);
172 case GL_INT:
173 return sizeof(GLint);
174 case GL_HALF_FLOAT_ARB:
175 return sizeof(GLhalfARB);
176 case GL_FLOAT:
177 return sizeof(GLfloat);
178 case GL_UNSIGNED_BYTE_3_3_2:
179 case GL_UNSIGNED_BYTE_2_3_3_REV:
180 case MESA_UNSIGNED_BYTE_4_4:
181 return sizeof(GLubyte);
182 case GL_UNSIGNED_SHORT_5_6_5:
183 case GL_UNSIGNED_SHORT_5_6_5_REV:
184 case GL_UNSIGNED_SHORT_4_4_4_4:
185 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
186 case GL_UNSIGNED_SHORT_5_5_5_1:
187 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
188 case GL_UNSIGNED_SHORT_8_8_MESA:
189 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
190 return sizeof(GLushort);
191 case GL_UNSIGNED_INT_8_8_8_8:
192 case GL_UNSIGNED_INT_8_8_8_8_REV:
193 case GL_UNSIGNED_INT_10_10_10_2:
194 case GL_UNSIGNED_INT_2_10_10_10_REV:
195 case GL_UNSIGNED_INT_24_8_EXT:
196 case GL_UNSIGNED_INT_5_9_9_9_REV:
197 case GL_UNSIGNED_INT_10F_11F_11F_REV:
198 return sizeof(GLuint);
199 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
200 return 8;
201 default:
202 return -1;
203 }
204 }
205
206
207 /**
208 * Get the number of components in a pixel format.
209 *
210 * \param format pixel format.
211 *
212 * \return the number of components in the given format, or -1 if a bad format.
213 */
214 GLint
215 _mesa_components_in_format( GLenum format )
216 {
217 switch (format) {
218 case GL_COLOR_INDEX:
219 case GL_STENCIL_INDEX:
220 case GL_DEPTH_COMPONENT:
221 case GL_RED:
222 case GL_RED_INTEGER_EXT:
223 case GL_GREEN:
224 case GL_GREEN_INTEGER_EXT:
225 case GL_BLUE:
226 case GL_BLUE_INTEGER_EXT:
227 case GL_ALPHA:
228 case GL_ALPHA_INTEGER_EXT:
229 case GL_LUMINANCE:
230 case GL_LUMINANCE_INTEGER_EXT:
231 case GL_INTENSITY:
232 return 1;
233
234 case GL_LUMINANCE_ALPHA:
235 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
236 case GL_RG:
237 case GL_YCBCR_MESA:
238 case GL_DEPTH_STENCIL_EXT:
239 case GL_DUDV_ATI:
240 case GL_DU8DV8_ATI:
241 return 2;
242
243 case GL_RGB:
244 case GL_BGR:
245 case GL_RGB_INTEGER_EXT:
246 case GL_BGR_INTEGER_EXT:
247 return 3;
248
249 case GL_RGBA:
250 case GL_BGRA:
251 case GL_ABGR_EXT:
252 case GL_RGBA_INTEGER_EXT:
253 case GL_BGRA_INTEGER_EXT:
254 return 4;
255
256 default:
257 return -1;
258 }
259 }
260
261
262 /**
263 * Get the bytes per pixel of pixel format type pair.
264 *
265 * \param format pixel format.
266 * \param type pixel type.
267 *
268 * \return bytes per pixel, or -1 if a bad format or type was given.
269 */
270 GLint
271 _mesa_bytes_per_pixel( GLenum format, GLenum type )
272 {
273 GLint comps = _mesa_components_in_format( format );
274 if (comps < 0)
275 return -1;
276
277 switch (type) {
278 case GL_BITMAP:
279 return 0; /* special case */
280 case GL_BYTE:
281 case GL_UNSIGNED_BYTE:
282 return comps * sizeof(GLubyte);
283 case GL_SHORT:
284 case GL_UNSIGNED_SHORT:
285 return comps * sizeof(GLshort);
286 case GL_INT:
287 case GL_UNSIGNED_INT:
288 return comps * sizeof(GLint);
289 case GL_FLOAT:
290 return comps * sizeof(GLfloat);
291 case GL_HALF_FLOAT_ARB:
292 return comps * sizeof(GLhalfARB);
293 case GL_UNSIGNED_BYTE_3_3_2:
294 case GL_UNSIGNED_BYTE_2_3_3_REV:
295 if (format == GL_RGB || format == GL_BGR ||
296 format == GL_RGB_INTEGER_EXT || format == GL_BGR_INTEGER_EXT)
297 return sizeof(GLubyte);
298 else
299 return -1; /* error */
300 case GL_UNSIGNED_SHORT_5_6_5:
301 case GL_UNSIGNED_SHORT_5_6_5_REV:
302 if (format == GL_RGB || format == GL_BGR ||
303 format == GL_RGB_INTEGER_EXT || format == GL_BGR_INTEGER_EXT)
304 return sizeof(GLushort);
305 else
306 return -1; /* error */
307 case GL_UNSIGNED_SHORT_4_4_4_4:
308 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
309 case GL_UNSIGNED_SHORT_5_5_5_1:
310 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
311 if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT ||
312 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT)
313 return sizeof(GLushort);
314 else
315 return -1;
316 case GL_UNSIGNED_INT_8_8_8_8:
317 case GL_UNSIGNED_INT_8_8_8_8_REV:
318 case GL_UNSIGNED_INT_10_10_10_2:
319 case GL_UNSIGNED_INT_2_10_10_10_REV:
320 if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT ||
321 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT)
322 return sizeof(GLuint);
323 else
324 return -1;
325 case GL_UNSIGNED_SHORT_8_8_MESA:
326 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
327 if (format == GL_YCBCR_MESA)
328 return sizeof(GLushort);
329 else
330 return -1;
331 case GL_UNSIGNED_INT_24_8_EXT:
332 if (format == GL_DEPTH_STENCIL_EXT)
333 return sizeof(GLuint);
334 else
335 return -1;
336 case GL_UNSIGNED_INT_5_9_9_9_REV:
337 if (format == GL_RGB)
338 return sizeof(GLuint);
339 else
340 return -1;
341 case GL_UNSIGNED_INT_10F_11F_11F_REV:
342 if (format == GL_RGB)
343 return sizeof(GLuint);
344 else
345 return -1;
346 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
347 if (format == GL_DEPTH_STENCIL)
348 return 8;
349 else
350 return -1;
351 default:
352 return -1;
353 }
354 }
355
356
357 /**
358 * Test for a legal pixel format and type.
359 *
360 * \param format pixel format.
361 * \param type pixel type.
362 *
363 * \return GL_TRUE if the given pixel format and type are legal, or GL_FALSE
364 * otherwise.
365 */
366 GLboolean
367 _mesa_is_legal_format_and_type(const struct gl_context *ctx,
368 GLenum format, GLenum type)
369 {
370 switch (format) {
371 case GL_COLOR_INDEX:
372 case GL_STENCIL_INDEX:
373 switch (type) {
374 case GL_BITMAP:
375 case GL_BYTE:
376 case GL_UNSIGNED_BYTE:
377 case GL_SHORT:
378 case GL_UNSIGNED_SHORT:
379 case GL_INT:
380 case GL_UNSIGNED_INT:
381 case GL_FLOAT:
382 return GL_TRUE;
383 case GL_HALF_FLOAT_ARB:
384 return ctx->Extensions.ARB_half_float_pixel;
385 default:
386 return GL_FALSE;
387 }
388 case GL_RED:
389 case GL_GREEN:
390 case GL_BLUE:
391 case GL_ALPHA:
392 #if 0 /* not legal! see table 3.6 of the 1.5 spec */
393 case GL_INTENSITY:
394 #endif
395 case GL_LUMINANCE:
396 case GL_LUMINANCE_ALPHA:
397 case GL_DEPTH_COMPONENT:
398 switch (type) {
399 case GL_BYTE:
400 case GL_UNSIGNED_BYTE:
401 case GL_SHORT:
402 case GL_UNSIGNED_SHORT:
403 case GL_INT:
404 case GL_UNSIGNED_INT:
405 case GL_FLOAT:
406 return GL_TRUE;
407 case GL_HALF_FLOAT_ARB:
408 return ctx->Extensions.ARB_half_float_pixel;
409 default:
410 return GL_FALSE;
411 }
412 case GL_RG:
413 if (!ctx->Extensions.ARB_texture_rg)
414 return GL_FALSE;
415
416 switch (type) {
417 case GL_BYTE:
418 case GL_UNSIGNED_BYTE:
419 case GL_SHORT:
420 case GL_UNSIGNED_SHORT:
421 case GL_INT:
422 case GL_UNSIGNED_INT:
423 case GL_FLOAT:
424 return GL_TRUE;
425 case GL_HALF_FLOAT_ARB:
426 return ctx->Extensions.ARB_half_float_pixel;
427 default:
428 return GL_FALSE;
429 }
430 case GL_RGB:
431 switch (type) {
432 case GL_BYTE:
433 case GL_UNSIGNED_BYTE:
434 case GL_SHORT:
435 case GL_UNSIGNED_SHORT:
436 case GL_INT:
437 case GL_UNSIGNED_INT:
438 case GL_FLOAT:
439 case GL_UNSIGNED_BYTE_3_3_2:
440 case GL_UNSIGNED_BYTE_2_3_3_REV:
441 case GL_UNSIGNED_SHORT_5_6_5:
442 case GL_UNSIGNED_SHORT_5_6_5_REV:
443 return GL_TRUE;
444 case GL_HALF_FLOAT_ARB:
445 return ctx->Extensions.ARB_half_float_pixel;
446 case GL_UNSIGNED_INT_5_9_9_9_REV:
447 return ctx->Extensions.EXT_texture_shared_exponent;
448 case GL_UNSIGNED_INT_10F_11F_11F_REV:
449 return ctx->Extensions.EXT_packed_float;
450 default:
451 return GL_FALSE;
452 }
453 case GL_BGR:
454 switch (type) {
455 /* NOTE: no packed types are supported with BGR. That's
456 * intentional, according to the GL spec.
457 */
458 case GL_BYTE:
459 case GL_UNSIGNED_BYTE:
460 case GL_SHORT:
461 case GL_UNSIGNED_SHORT:
462 case GL_INT:
463 case GL_UNSIGNED_INT:
464 case GL_FLOAT:
465 return GL_TRUE;
466 case GL_HALF_FLOAT_ARB:
467 return ctx->Extensions.ARB_half_float_pixel;
468 default:
469 return GL_FALSE;
470 }
471 case GL_RGBA:
472 case GL_BGRA:
473 case GL_ABGR_EXT:
474 switch (type) {
475 case GL_BYTE:
476 case GL_UNSIGNED_BYTE:
477 case GL_SHORT:
478 case GL_UNSIGNED_SHORT:
479 case GL_INT:
480 case GL_UNSIGNED_INT:
481 case GL_FLOAT:
482 case GL_UNSIGNED_SHORT_4_4_4_4:
483 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
484 case GL_UNSIGNED_SHORT_5_5_5_1:
485 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
486 case GL_UNSIGNED_INT_8_8_8_8:
487 case GL_UNSIGNED_INT_8_8_8_8_REV:
488 case GL_UNSIGNED_INT_10_10_10_2:
489 case GL_UNSIGNED_INT_2_10_10_10_REV:
490 return GL_TRUE;
491 case GL_HALF_FLOAT_ARB:
492 return ctx->Extensions.ARB_half_float_pixel;
493 default:
494 return GL_FALSE;
495 }
496 case GL_YCBCR_MESA:
497 if (type == GL_UNSIGNED_SHORT_8_8_MESA ||
498 type == GL_UNSIGNED_SHORT_8_8_REV_MESA)
499 return GL_TRUE;
500 else
501 return GL_FALSE;
502 case GL_DEPTH_STENCIL_EXT:
503 if ((ctx->Extensions.EXT_packed_depth_stencil &&
504 type == GL_UNSIGNED_INT_24_8_EXT) ||
505 (ctx->Extensions.ARB_depth_buffer_float &&
506 type == GL_FLOAT_32_UNSIGNED_INT_24_8_REV))
507 return GL_TRUE;
508 else
509 return GL_FALSE;
510 case GL_DUDV_ATI:
511 case GL_DU8DV8_ATI:
512 switch (type) {
513 case GL_BYTE:
514 case GL_UNSIGNED_BYTE:
515 case GL_SHORT:
516 case GL_UNSIGNED_SHORT:
517 case GL_INT:
518 case GL_UNSIGNED_INT:
519 case GL_FLOAT:
520 return GL_TRUE;
521 default:
522 return GL_FALSE;
523 }
524
525 /* integer-valued formats */
526 case GL_RED_INTEGER_EXT:
527 case GL_GREEN_INTEGER_EXT:
528 case GL_BLUE_INTEGER_EXT:
529 case GL_ALPHA_INTEGER_EXT:
530 switch (type) {
531 case GL_BYTE:
532 case GL_UNSIGNED_BYTE:
533 case GL_SHORT:
534 case GL_UNSIGNED_SHORT:
535 case GL_INT:
536 case GL_UNSIGNED_INT:
537 return ctx->Extensions.EXT_texture_integer;
538 default:
539 return GL_FALSE;
540 }
541
542 case GL_RGB_INTEGER_EXT:
543 switch (type) {
544 case GL_BYTE:
545 case GL_UNSIGNED_BYTE:
546 case GL_SHORT:
547 case GL_UNSIGNED_SHORT:
548 case GL_INT:
549 case GL_UNSIGNED_INT:
550 return ctx->Extensions.EXT_texture_integer;
551 case GL_UNSIGNED_BYTE_3_3_2:
552 case GL_UNSIGNED_BYTE_2_3_3_REV:
553 case GL_UNSIGNED_SHORT_5_6_5:
554 case GL_UNSIGNED_SHORT_5_6_5_REV:
555 return ctx->Extensions.ARB_texture_rgb10_a2ui;
556 default:
557 return GL_FALSE;
558 }
559
560 case GL_BGR_INTEGER_EXT:
561 switch (type) {
562 case GL_BYTE:
563 case GL_UNSIGNED_BYTE:
564 case GL_SHORT:
565 case GL_UNSIGNED_SHORT:
566 case GL_INT:
567 case GL_UNSIGNED_INT:
568 /* NOTE: no packed formats w/ BGR format */
569 return ctx->Extensions.EXT_texture_integer;
570 default:
571 return GL_FALSE;
572 }
573
574 case GL_RGBA_INTEGER_EXT:
575 case GL_BGRA_INTEGER_EXT:
576 switch (type) {
577 case GL_BYTE:
578 case GL_UNSIGNED_BYTE:
579 case GL_SHORT:
580 case GL_UNSIGNED_SHORT:
581 case GL_INT:
582 case GL_UNSIGNED_INT:
583 return ctx->Extensions.EXT_texture_integer;
584 case GL_UNSIGNED_SHORT_4_4_4_4:
585 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
586 case GL_UNSIGNED_SHORT_5_5_5_1:
587 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
588 case GL_UNSIGNED_INT_8_8_8_8:
589 case GL_UNSIGNED_INT_8_8_8_8_REV:
590 case GL_UNSIGNED_INT_10_10_10_2:
591 case GL_UNSIGNED_INT_2_10_10_10_REV:
592 return ctx->Extensions.ARB_texture_rgb10_a2ui;
593 default:
594 return GL_FALSE;
595 }
596
597 case GL_LUMINANCE_INTEGER_EXT:
598 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
599 switch (type) {
600 case GL_BYTE:
601 case GL_UNSIGNED_BYTE:
602 case GL_SHORT:
603 case GL_UNSIGNED_SHORT:
604 case GL_INT:
605 case GL_UNSIGNED_INT:
606 return ctx->Extensions.EXT_texture_integer;
607 default:
608 return GL_FALSE;
609 }
610
611 default:
612 ; /* fall-through */
613 }
614 return GL_FALSE;
615 }
616
617
618 /**
619 * Test if the given image format is a color/RGBA format (i.e., not color
620 * index, depth, stencil, etc).
621 * \param format the image format value (may by an internal texture format)
622 * \return GL_TRUE if its a color/RGBA format, GL_FALSE otherwise.
623 */
624 GLboolean
625 _mesa_is_color_format(GLenum format)
626 {
627 switch (format) {
628 case GL_RED:
629 case GL_GREEN:
630 case GL_BLUE:
631 case GL_ALPHA:
632 case GL_ALPHA4:
633 case GL_ALPHA8:
634 case GL_ALPHA12:
635 case GL_ALPHA16:
636 case 1:
637 case GL_LUMINANCE:
638 case GL_LUMINANCE4:
639 case GL_LUMINANCE8:
640 case GL_LUMINANCE12:
641 case GL_LUMINANCE16:
642 case 2:
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 case GL_INTENSITY:
651 case GL_INTENSITY4:
652 case GL_INTENSITY8:
653 case GL_INTENSITY12:
654 case GL_INTENSITY16:
655 case GL_R8:
656 case GL_R16:
657 case GL_RG:
658 case GL_RG8:
659 case GL_RG16:
660 case 3:
661 case GL_RGB:
662 case GL_BGR:
663 case GL_R3_G3_B2:
664 case GL_RGB4:
665 case GL_RGB5:
666 case GL_RGB8:
667 case GL_RGB10:
668 case GL_RGB12:
669 case GL_RGB16:
670 case 4:
671 case GL_ABGR_EXT:
672 case GL_RGBA:
673 case GL_BGRA:
674 case GL_RGBA2:
675 case GL_RGBA4:
676 case GL_RGB5_A1:
677 case GL_RGBA8:
678 case GL_RGB10_A2:
679 case GL_RGBA12:
680 case GL_RGBA16:
681 /* float texture formats */
682 case GL_ALPHA16F_ARB:
683 case GL_ALPHA32F_ARB:
684 case GL_LUMINANCE16F_ARB:
685 case GL_LUMINANCE32F_ARB:
686 case GL_LUMINANCE_ALPHA16F_ARB:
687 case GL_LUMINANCE_ALPHA32F_ARB:
688 case GL_INTENSITY16F_ARB:
689 case GL_INTENSITY32F_ARB:
690 case GL_R16F:
691 case GL_R32F:
692 case GL_RG16F:
693 case GL_RG32F:
694 case GL_RGB16F_ARB:
695 case GL_RGB32F_ARB:
696 case GL_RGBA16F_ARB:
697 case GL_RGBA32F_ARB:
698 /* compressed formats */
699 case GL_COMPRESSED_ALPHA:
700 case GL_COMPRESSED_LUMINANCE:
701 case GL_COMPRESSED_LUMINANCE_ALPHA:
702 case GL_COMPRESSED_INTENSITY:
703 case GL_COMPRESSED_RED:
704 case GL_COMPRESSED_RG:
705 case GL_COMPRESSED_RGB:
706 case GL_COMPRESSED_RGBA:
707 case GL_RGB_S3TC:
708 case GL_RGB4_S3TC:
709 case GL_RGBA_S3TC:
710 case GL_RGBA4_S3TC:
711 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
712 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
713 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
714 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
715 case GL_COMPRESSED_RGB_FXT1_3DFX:
716 case GL_COMPRESSED_RGBA_FXT1_3DFX:
717 #if FEATURE_EXT_texture_sRGB
718 case GL_SRGB_EXT:
719 case GL_SRGB8_EXT:
720 case GL_SRGB_ALPHA_EXT:
721 case GL_SRGB8_ALPHA8_EXT:
722 case GL_SLUMINANCE_ALPHA_EXT:
723 case GL_SLUMINANCE8_ALPHA8_EXT:
724 case GL_SLUMINANCE_EXT:
725 case GL_SLUMINANCE8_EXT:
726 case GL_COMPRESSED_SRGB_EXT:
727 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
728 case GL_COMPRESSED_SRGB_ALPHA_EXT:
729 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
730 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
731 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
732 case GL_COMPRESSED_SLUMINANCE_EXT:
733 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
734 #endif /* FEATURE_EXT_texture_sRGB */
735 case GL_COMPRESSED_RED_RGTC1:
736 case GL_COMPRESSED_SIGNED_RED_RGTC1:
737 case GL_COMPRESSED_RG_RGTC2:
738 case GL_COMPRESSED_SIGNED_RG_RGTC2:
739 case GL_COMPRESSED_LUMINANCE_LATC1_EXT:
740 case GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT:
741 case GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT:
742 case GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT:
743 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
744 /* generic integer formats */
745 case GL_RED_INTEGER_EXT:
746 case GL_GREEN_INTEGER_EXT:
747 case GL_BLUE_INTEGER_EXT:
748 case GL_ALPHA_INTEGER_EXT:
749 case GL_RGB_INTEGER_EXT:
750 case GL_RGBA_INTEGER_EXT:
751 case GL_BGR_INTEGER_EXT:
752 case GL_BGRA_INTEGER_EXT:
753 case GL_LUMINANCE_INTEGER_EXT:
754 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
755 /* sized integer formats */
756 case GL_RGBA32UI_EXT:
757 case GL_RGB32UI_EXT:
758 case GL_ALPHA32UI_EXT:
759 case GL_INTENSITY32UI_EXT:
760 case GL_LUMINANCE32UI_EXT:
761 case GL_LUMINANCE_ALPHA32UI_EXT:
762 case GL_RGBA16UI_EXT:
763 case GL_RGB16UI_EXT:
764 case GL_ALPHA16UI_EXT:
765 case GL_INTENSITY16UI_EXT:
766 case GL_LUMINANCE16UI_EXT:
767 case GL_LUMINANCE_ALPHA16UI_EXT:
768 case GL_RGBA8UI_EXT:
769 case GL_RGB8UI_EXT:
770 case GL_ALPHA8UI_EXT:
771 case GL_INTENSITY8UI_EXT:
772 case GL_LUMINANCE8UI_EXT:
773 case GL_LUMINANCE_ALPHA8UI_EXT:
774 case GL_RGBA32I_EXT:
775 case GL_RGB32I_EXT:
776 case GL_ALPHA32I_EXT:
777 case GL_INTENSITY32I_EXT:
778 case GL_LUMINANCE32I_EXT:
779 case GL_LUMINANCE_ALPHA32I_EXT:
780 case GL_RGBA16I_EXT:
781 case GL_RGB16I_EXT:
782 case GL_ALPHA16I_EXT:
783 case GL_INTENSITY16I_EXT:
784 case GL_LUMINANCE16I_EXT:
785 case GL_LUMINANCE_ALPHA16I_EXT:
786 case GL_RGBA8I_EXT:
787 case GL_RGB8I_EXT:
788 case GL_ALPHA8I_EXT:
789 case GL_INTENSITY8I_EXT:
790 case GL_LUMINANCE8I_EXT:
791 case GL_LUMINANCE_ALPHA8I_EXT:
792 /* signed, normalized texture formats */
793 case GL_RED_SNORM:
794 case GL_R8_SNORM:
795 case GL_R16_SNORM:
796 case GL_RG_SNORM:
797 case GL_RG8_SNORM:
798 case GL_RG16_SNORM:
799 case GL_RGB_SNORM:
800 case GL_RGB8_SNORM:
801 case GL_RGB16_SNORM:
802 case GL_RGBA_SNORM:
803 case GL_RGBA8_SNORM:
804 case GL_RGBA16_SNORM:
805 case GL_ALPHA_SNORM:
806 case GL_ALPHA8_SNORM:
807 case GL_ALPHA16_SNORM:
808 case GL_LUMINANCE_SNORM:
809 case GL_LUMINANCE8_SNORM:
810 case GL_LUMINANCE16_SNORM:
811 case GL_LUMINANCE_ALPHA_SNORM:
812 case GL_LUMINANCE8_ALPHA8_SNORM:
813 case GL_LUMINANCE16_ALPHA16_SNORM:
814 case GL_INTENSITY_SNORM:
815 case GL_INTENSITY8_SNORM:
816 case GL_INTENSITY16_SNORM:
817 case GL_RGB9_E5:
818 case GL_R11F_G11F_B10F:
819 case GL_RGB10_A2UI:
820 return GL_TRUE;
821 case GL_YCBCR_MESA: /* not considered to be RGB */
822 /* fall-through */
823 default:
824 return GL_FALSE;
825 }
826 }
827
828
829 /**
830 * Test if the given image format is a depth component format.
831 */
832 GLboolean
833 _mesa_is_depth_format(GLenum format)
834 {
835 switch (format) {
836 case GL_DEPTH_COMPONENT:
837 case GL_DEPTH_COMPONENT16:
838 case GL_DEPTH_COMPONENT24:
839 case GL_DEPTH_COMPONENT32:
840 case GL_DEPTH_COMPONENT32F:
841 return GL_TRUE;
842 default:
843 return GL_FALSE;
844 }
845 }
846
847
848 /**
849 * Test if the given image format is a stencil format.
850 */
851 GLboolean
852 _mesa_is_stencil_format(GLenum format)
853 {
854 switch (format) {
855 case GL_STENCIL_INDEX:
856 case GL_DEPTH_STENCIL:
857 return GL_TRUE;
858 default:
859 return GL_FALSE;
860 }
861 }
862
863
864 /**
865 * Test if the given image format is a YCbCr format.
866 */
867 GLboolean
868 _mesa_is_ycbcr_format(GLenum format)
869 {
870 switch (format) {
871 case GL_YCBCR_MESA:
872 return GL_TRUE;
873 default:
874 return GL_FALSE;
875 }
876 }
877
878
879 /**
880 * Test if the given image format is a depth+stencil format.
881 */
882 GLboolean
883 _mesa_is_depthstencil_format(GLenum format)
884 {
885 switch (format) {
886 case GL_DEPTH24_STENCIL8_EXT:
887 case GL_DEPTH_STENCIL_EXT:
888 case GL_DEPTH32F_STENCIL8:
889 return GL_TRUE;
890 default:
891 return GL_FALSE;
892 }
893 }
894
895
896 /**
897 * Test if the given image format is a depth or stencil format.
898 */
899 GLboolean
900 _mesa_is_depth_or_stencil_format(GLenum format)
901 {
902 switch (format) {
903 case GL_DEPTH_COMPONENT:
904 case GL_DEPTH_COMPONENT16:
905 case GL_DEPTH_COMPONENT24:
906 case GL_DEPTH_COMPONENT32:
907 case GL_STENCIL_INDEX:
908 case GL_STENCIL_INDEX1_EXT:
909 case GL_STENCIL_INDEX4_EXT:
910 case GL_STENCIL_INDEX8_EXT:
911 case GL_STENCIL_INDEX16_EXT:
912 case GL_DEPTH_STENCIL_EXT:
913 case GL_DEPTH24_STENCIL8_EXT:
914 case GL_DEPTH_COMPONENT32F:
915 case GL_DEPTH32F_STENCIL8:
916 return GL_TRUE;
917 default:
918 return GL_FALSE;
919 }
920 }
921
922
923 /**
924 * Test if the given image format is a dudv format.
925 */
926 GLboolean
927 _mesa_is_dudv_format(GLenum format)
928 {
929 switch (format) {
930 case GL_DUDV_ATI:
931 case GL_DU8DV8_ATI:
932 return GL_TRUE;
933 default:
934 return GL_FALSE;
935 }
936 }
937
938
939 /**
940 * Test if the given format is an integer (non-normalized) format.
941 */
942 GLboolean
943 _mesa_is_integer_format(GLenum format)
944 {
945 switch (format) {
946 /* generic integer formats */
947 case GL_RED_INTEGER_EXT:
948 case GL_GREEN_INTEGER_EXT:
949 case GL_BLUE_INTEGER_EXT:
950 case GL_ALPHA_INTEGER_EXT:
951 case GL_RGB_INTEGER_EXT:
952 case GL_RGBA_INTEGER_EXT:
953 case GL_BGR_INTEGER_EXT:
954 case GL_BGRA_INTEGER_EXT:
955 case GL_LUMINANCE_INTEGER_EXT:
956 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
957 /* specific integer formats */
958 case GL_RGBA32UI_EXT:
959 case GL_RGB32UI_EXT:
960 case GL_RG32UI:
961 case GL_R32UI:
962 case GL_ALPHA32UI_EXT:
963 case GL_INTENSITY32UI_EXT:
964 case GL_LUMINANCE32UI_EXT:
965 case GL_LUMINANCE_ALPHA32UI_EXT:
966 case GL_RGBA16UI_EXT:
967 case GL_RGB16UI_EXT:
968 case GL_RG16UI:
969 case GL_R16UI:
970 case GL_ALPHA16UI_EXT:
971 case GL_INTENSITY16UI_EXT:
972 case GL_LUMINANCE16UI_EXT:
973 case GL_LUMINANCE_ALPHA16UI_EXT:
974 case GL_RGBA8UI_EXT:
975 case GL_RGB8UI_EXT:
976 case GL_RG8UI:
977 case GL_R8UI:
978 case GL_ALPHA8UI_EXT:
979 case GL_INTENSITY8UI_EXT:
980 case GL_LUMINANCE8UI_EXT:
981 case GL_LUMINANCE_ALPHA8UI_EXT:
982 case GL_RGBA32I_EXT:
983 case GL_RGB32I_EXT:
984 case GL_RG32I:
985 case GL_R32I:
986 case GL_ALPHA32I_EXT:
987 case GL_INTENSITY32I_EXT:
988 case GL_LUMINANCE32I_EXT:
989 case GL_LUMINANCE_ALPHA32I_EXT:
990 case GL_RGBA16I_EXT:
991 case GL_RGB16I_EXT:
992 case GL_RG16I:
993 case GL_R16I:
994 case GL_ALPHA16I_EXT:
995 case GL_INTENSITY16I_EXT:
996 case GL_LUMINANCE16I_EXT:
997 case GL_LUMINANCE_ALPHA16I_EXT:
998 case GL_RGBA8I_EXT:
999 case GL_RGB8I_EXT:
1000 case GL_RG8I:
1001 case GL_R8I:
1002 case GL_ALPHA8I_EXT:
1003 case GL_INTENSITY8I_EXT:
1004 case GL_LUMINANCE8I_EXT:
1005 case GL_LUMINANCE_ALPHA8I_EXT:
1006 case GL_RGB10_A2UI:
1007 return GL_TRUE;
1008 default:
1009 return GL_FALSE;
1010 }
1011 }
1012
1013
1014 /**
1015 * Test if an image format is a supported compressed format.
1016 * \param format the internal format token provided by the user.
1017 * \return GL_TRUE if compressed, GL_FALSE if uncompressed
1018 */
1019 GLboolean
1020 _mesa_is_compressed_format(struct gl_context *ctx, GLenum format)
1021 {
1022 switch (format) {
1023 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
1024 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
1025 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
1026 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
1027 return ctx->Extensions.EXT_texture_compression_s3tc;
1028 case GL_RGB_S3TC:
1029 case GL_RGB4_S3TC:
1030 case GL_RGBA_S3TC:
1031 case GL_RGBA4_S3TC:
1032 return ctx->Extensions.S3_s3tc;
1033 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
1034 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
1035 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
1036 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
1037 return ctx->Extensions.EXT_texture_sRGB
1038 && ctx->Extensions.EXT_texture_compression_s3tc;
1039 case GL_COMPRESSED_RGB_FXT1_3DFX:
1040 case GL_COMPRESSED_RGBA_FXT1_3DFX:
1041 return ctx->Extensions.TDFX_texture_compression_FXT1;
1042 case GL_COMPRESSED_RED_RGTC1:
1043 case GL_COMPRESSED_SIGNED_RED_RGTC1:
1044 case GL_COMPRESSED_RG_RGTC2:
1045 case GL_COMPRESSED_SIGNED_RG_RGTC2:
1046 return ctx->Extensions.ARB_texture_compression_rgtc;
1047 case GL_COMPRESSED_LUMINANCE_LATC1_EXT:
1048 case GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT:
1049 case GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT:
1050 case GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT:
1051 return ctx->Extensions.EXT_texture_compression_latc;
1052 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
1053 return ctx->Extensions.ATI_texture_compression_3dc;
1054 #if FEATURE_ES
1055 case GL_PALETTE4_RGB8_OES:
1056 case GL_PALETTE4_RGBA8_OES:
1057 case GL_PALETTE4_R5_G6_B5_OES:
1058 case GL_PALETTE4_RGBA4_OES:
1059 case GL_PALETTE4_RGB5_A1_OES:
1060 case GL_PALETTE8_RGB8_OES:
1061 case GL_PALETTE8_RGBA8_OES:
1062 case GL_PALETTE8_R5_G6_B5_OES:
1063 case GL_PALETTE8_RGBA4_OES:
1064 case GL_PALETTE8_RGB5_A1_OES:
1065 return ctx->API == API_OPENGLES;
1066 #endif
1067 default:
1068 return GL_FALSE;
1069 }
1070 }
1071
1072
1073 /**
1074 * Return the address of a specific pixel in an image (1D, 2D or 3D).
1075 *
1076 * Pixel unpacking/packing parameters are observed according to \p packing.
1077 *
1078 * \param dimensions either 1, 2 or 3 to indicate dimensionality of image
1079 * \param image starting address of image data
1080 * \param width the image width
1081 * \param height theimage height
1082 * \param format the pixel format
1083 * \param type the pixel data type
1084 * \param packing the pixelstore attributes
1085 * \param img which image in the volume (0 for 1D or 2D images)
1086 * \param row row of pixel in the image (0 for 1D images)
1087 * \param column column of pixel in the image
1088 *
1089 * \return address of pixel on success, or NULL on error.
1090 *
1091 * \sa gl_pixelstore_attrib.
1092 */
1093 GLvoid *
1094 _mesa_image_address( GLuint dimensions,
1095 const struct gl_pixelstore_attrib *packing,
1096 const GLvoid *image,
1097 GLsizei width, GLsizei height,
1098 GLenum format, GLenum type,
1099 GLint img, GLint row, GLint column )
1100 {
1101 GLint alignment; /* 1, 2 or 4 */
1102 GLint pixels_per_row;
1103 GLint rows_per_image;
1104 GLint skiprows;
1105 GLint skippixels;
1106 GLint skipimages; /* for 3-D volume images */
1107 GLubyte *pixel_addr;
1108
1109 ASSERT(dimensions >= 1 && dimensions <= 3);
1110
1111 alignment = packing->Alignment;
1112 if (packing->RowLength > 0) {
1113 pixels_per_row = packing->RowLength;
1114 }
1115 else {
1116 pixels_per_row = width;
1117 }
1118 if (packing->ImageHeight > 0) {
1119 rows_per_image = packing->ImageHeight;
1120 }
1121 else {
1122 rows_per_image = height;
1123 }
1124
1125 skippixels = packing->SkipPixels;
1126 /* Note: SKIP_ROWS _is_ used for 1D images */
1127 skiprows = packing->SkipRows;
1128 /* Note: SKIP_IMAGES is only used for 3D images */
1129 skipimages = (dimensions == 3) ? packing->SkipImages : 0;
1130
1131 if (type == GL_BITMAP) {
1132 /* BITMAP data */
1133 GLint comp_per_pixel; /* components per pixel */
1134 GLint bytes_per_comp; /* bytes per component */
1135 GLint bytes_per_row;
1136 GLint bytes_per_image;
1137
1138 /* Compute bytes per component */
1139 bytes_per_comp = _mesa_sizeof_packed_type( type );
1140 if (bytes_per_comp < 0) {
1141 return NULL;
1142 }
1143
1144 /* Compute number of components per pixel */
1145 comp_per_pixel = _mesa_components_in_format( format );
1146 if (comp_per_pixel < 0) {
1147 return NULL;
1148 }
1149
1150 bytes_per_row = alignment
1151 * CEILING( comp_per_pixel*pixels_per_row, 8*alignment );
1152
1153 bytes_per_image = bytes_per_row * rows_per_image;
1154
1155 pixel_addr = (GLubyte *) image
1156 + (skipimages + img) * bytes_per_image
1157 + (skiprows + row) * bytes_per_row
1158 + (skippixels + column) / 8;
1159 }
1160 else {
1161 /* Non-BITMAP data */
1162 GLint bytes_per_pixel, bytes_per_row, remainder, bytes_per_image;
1163 GLint topOfImage;
1164
1165 bytes_per_pixel = _mesa_bytes_per_pixel( format, type );
1166
1167 /* The pixel type and format should have been error checked earlier */
1168 assert(bytes_per_pixel > 0);
1169
1170 bytes_per_row = pixels_per_row * bytes_per_pixel;
1171 remainder = bytes_per_row % alignment;
1172 if (remainder > 0)
1173 bytes_per_row += (alignment - remainder);
1174
1175 ASSERT(bytes_per_row % alignment == 0);
1176
1177 bytes_per_image = bytes_per_row * rows_per_image;
1178
1179 if (packing->Invert) {
1180 /* set pixel_addr to the last row */
1181 topOfImage = bytes_per_row * (height - 1);
1182 bytes_per_row = -bytes_per_row;
1183 }
1184 else {
1185 topOfImage = 0;
1186 }
1187
1188 /* compute final pixel address */
1189 pixel_addr = (GLubyte *) image
1190 + (skipimages + img) * bytes_per_image
1191 + topOfImage
1192 + (skiprows + row) * bytes_per_row
1193 + (skippixels + column) * bytes_per_pixel;
1194 }
1195
1196 return (GLvoid *) pixel_addr;
1197 }
1198
1199
1200 GLvoid *
1201 _mesa_image_address1d( const struct gl_pixelstore_attrib *packing,
1202 const GLvoid *image,
1203 GLsizei width,
1204 GLenum format, GLenum type,
1205 GLint column )
1206 {
1207 return _mesa_image_address(1, packing, image, width, 1,
1208 format, type, 0, 0, column);
1209 }
1210
1211
1212 GLvoid *
1213 _mesa_image_address2d( const struct gl_pixelstore_attrib *packing,
1214 const GLvoid *image,
1215 GLsizei width, GLsizei height,
1216 GLenum format, GLenum type,
1217 GLint row, GLint column )
1218 {
1219 return _mesa_image_address(2, packing, image, width, height,
1220 format, type, 0, row, column);
1221 }
1222
1223
1224 GLvoid *
1225 _mesa_image_address3d( const struct gl_pixelstore_attrib *packing,
1226 const GLvoid *image,
1227 GLsizei width, GLsizei height,
1228 GLenum format, GLenum type,
1229 GLint img, GLint row, GLint column )
1230 {
1231 return _mesa_image_address(3, packing, image, width, height,
1232 format, type, img, row, column);
1233 }
1234
1235
1236
1237 /**
1238 * Compute the stride (in bytes) between image rows.
1239 *
1240 * \param packing the pixelstore attributes
1241 * \param width image width.
1242 * \param format pixel format.
1243 * \param type pixel data type.
1244 *
1245 * \return the stride in bytes for the given parameters, or -1 if error
1246 */
1247 GLint
1248 _mesa_image_row_stride( const struct gl_pixelstore_attrib *packing,
1249 GLint width, GLenum format, GLenum type )
1250 {
1251 GLint bytesPerRow, remainder;
1252
1253 ASSERT(packing);
1254
1255 if (type == GL_BITMAP) {
1256 if (packing->RowLength == 0) {
1257 bytesPerRow = (width + 7) / 8;
1258 }
1259 else {
1260 bytesPerRow = (packing->RowLength + 7) / 8;
1261 }
1262 }
1263 else {
1264 /* Non-BITMAP data */
1265 const GLint bytesPerPixel = _mesa_bytes_per_pixel(format, type);
1266 if (bytesPerPixel <= 0)
1267 return -1; /* error */
1268 if (packing->RowLength == 0) {
1269 bytesPerRow = bytesPerPixel * width;
1270 }
1271 else {
1272 bytesPerRow = bytesPerPixel * packing->RowLength;
1273 }
1274 }
1275
1276 remainder = bytesPerRow % packing->Alignment;
1277 if (remainder > 0) {
1278 bytesPerRow += (packing->Alignment - remainder);
1279 }
1280
1281 if (packing->Invert) {
1282 /* negate the bytes per row (negative row stride) */
1283 bytesPerRow = -bytesPerRow;
1284 }
1285
1286 return bytesPerRow;
1287 }
1288
1289
1290 /*
1291 * Compute the stride between images in a 3D texture (in bytes) for the given
1292 * pixel packing parameters and image width, format and type.
1293 */
1294 GLint
1295 _mesa_image_image_stride( const struct gl_pixelstore_attrib *packing,
1296 GLint width, GLint height,
1297 GLenum format, GLenum type )
1298 {
1299 GLint bytesPerRow, bytesPerImage, remainder;
1300
1301 ASSERT(packing);
1302
1303 if (type == GL_BITMAP) {
1304 if (packing->RowLength == 0) {
1305 bytesPerRow = (width + 7) / 8;
1306 }
1307 else {
1308 bytesPerRow = (packing->RowLength + 7) / 8;
1309 }
1310 }
1311 else {
1312 const GLint bytesPerPixel = _mesa_bytes_per_pixel(format, type);
1313
1314 if (bytesPerPixel <= 0)
1315 return -1; /* error */
1316 if (packing->RowLength == 0) {
1317 bytesPerRow = bytesPerPixel * width;
1318 }
1319 else {
1320 bytesPerRow = bytesPerPixel * packing->RowLength;
1321 }
1322 }
1323
1324 remainder = bytesPerRow % packing->Alignment;
1325 if (remainder > 0)
1326 bytesPerRow += (packing->Alignment - remainder);
1327
1328 if (packing->ImageHeight == 0)
1329 bytesPerImage = bytesPerRow * height;
1330 else
1331 bytesPerImage = bytesPerRow * packing->ImageHeight;
1332
1333 return bytesPerImage;
1334 }
1335
1336
1337
1338 /**
1339 * "Expand" a bitmap from 1-bit per pixel to 8-bits per pixel.
1340 * This is typically used to convert a bitmap into a GLubyte/pixel texture.
1341 * "On" bits will set texels to \p onValue.
1342 * "Off" bits will not modify texels.
1343 * \param width src bitmap width in pixels
1344 * \param height src bitmap height in pixels
1345 * \param unpack bitmap unpacking state
1346 * \param bitmap the src bitmap data
1347 * \param destBuffer start of dest buffer
1348 * \param destStride row stride in dest buffer
1349 * \param onValue if bit is 1, set destBuffer pixel to this value
1350 */
1351 void
1352 _mesa_expand_bitmap(GLsizei width, GLsizei height,
1353 const struct gl_pixelstore_attrib *unpack,
1354 const GLubyte *bitmap,
1355 GLubyte *destBuffer, GLint destStride,
1356 GLubyte onValue)
1357 {
1358 const GLubyte *srcRow = (const GLubyte *)
1359 _mesa_image_address2d(unpack, bitmap, width, height,
1360 GL_COLOR_INDEX, GL_BITMAP, 0, 0);
1361 const GLint srcStride = _mesa_image_row_stride(unpack, width,
1362 GL_COLOR_INDEX, GL_BITMAP);
1363 GLint row, col;
1364
1365 #define SET_PIXEL(COL, ROW) \
1366 destBuffer[(ROW) * destStride + (COL)] = onValue;
1367
1368 for (row = 0; row < height; row++) {
1369 const GLubyte *src = srcRow;
1370
1371 if (unpack->LsbFirst) {
1372 /* Lsb first */
1373 GLubyte mask = 1U << (unpack->SkipPixels & 0x7);
1374 for (col = 0; col < width; col++) {
1375
1376 if (*src & mask) {
1377 SET_PIXEL(col, row);
1378 }
1379
1380 if (mask == 128U) {
1381 src++;
1382 mask = 1U;
1383 }
1384 else {
1385 mask = mask << 1;
1386 }
1387 }
1388
1389 /* get ready for next row */
1390 if (mask != 1)
1391 src++;
1392 }
1393 else {
1394 /* Msb first */
1395 GLubyte mask = 128U >> (unpack->SkipPixels & 0x7);
1396 for (col = 0; col < width; col++) {
1397
1398 if (*src & mask) {
1399 SET_PIXEL(col, row);
1400 }
1401
1402 if (mask == 1U) {
1403 src++;
1404 mask = 128U;
1405 }
1406 else {
1407 mask = mask >> 1;
1408 }
1409 }
1410
1411 /* get ready for next row */
1412 if (mask != 128)
1413 src++;
1414 }
1415
1416 srcRow += srcStride;
1417 } /* row */
1418
1419 #undef SET_PIXEL
1420 }
1421
1422
1423
1424
1425 /**
1426 * Convert an array of RGBA colors from one datatype to another.
1427 * NOTE: src may equal dst. In that case, we use a temporary buffer.
1428 */
1429 void
1430 _mesa_convert_colors(GLenum srcType, const GLvoid *src,
1431 GLenum dstType, GLvoid *dst,
1432 GLuint count, const GLubyte mask[])
1433 {
1434 GLuint tempBuffer[MAX_WIDTH][4];
1435 const GLboolean useTemp = (src == dst);
1436
1437 ASSERT(srcType != dstType);
1438
1439 switch (srcType) {
1440 case GL_UNSIGNED_BYTE:
1441 if (dstType == GL_UNSIGNED_SHORT) {
1442 const GLubyte (*src1)[4] = (const GLubyte (*)[4]) src;
1443 GLushort (*dst2)[4] = (GLushort (*)[4]) (useTemp ? tempBuffer : dst);
1444 GLuint i;
1445 for (i = 0; i < count; i++) {
1446 if (!mask || mask[i]) {
1447 dst2[i][RCOMP] = UBYTE_TO_USHORT(src1[i][RCOMP]);
1448 dst2[i][GCOMP] = UBYTE_TO_USHORT(src1[i][GCOMP]);
1449 dst2[i][BCOMP] = UBYTE_TO_USHORT(src1[i][BCOMP]);
1450 dst2[i][ACOMP] = UBYTE_TO_USHORT(src1[i][ACOMP]);
1451 }
1452 }
1453 if (useTemp)
1454 memcpy(dst, tempBuffer, count * 4 * sizeof(GLushort));
1455 }
1456 else {
1457 const GLubyte (*src1)[4] = (const GLubyte (*)[4]) src;
1458 GLfloat (*dst4)[4] = (GLfloat (*)[4]) (useTemp ? tempBuffer : dst);
1459 GLuint i;
1460 ASSERT(dstType == GL_FLOAT);
1461 for (i = 0; i < count; i++) {
1462 if (!mask || mask[i]) {
1463 dst4[i][RCOMP] = UBYTE_TO_FLOAT(src1[i][RCOMP]);
1464 dst4[i][GCOMP] = UBYTE_TO_FLOAT(src1[i][GCOMP]);
1465 dst4[i][BCOMP] = UBYTE_TO_FLOAT(src1[i][BCOMP]);
1466 dst4[i][ACOMP] = UBYTE_TO_FLOAT(src1[i][ACOMP]);
1467 }
1468 }
1469 if (useTemp)
1470 memcpy(dst, tempBuffer, count * 4 * sizeof(GLfloat));
1471 }
1472 break;
1473 case GL_UNSIGNED_SHORT:
1474 if (dstType == GL_UNSIGNED_BYTE) {
1475 const GLushort (*src2)[4] = (const GLushort (*)[4]) src;
1476 GLubyte (*dst1)[4] = (GLubyte (*)[4]) (useTemp ? tempBuffer : dst);
1477 GLuint i;
1478 for (i = 0; i < count; i++) {
1479 if (!mask || mask[i]) {
1480 dst1[i][RCOMP] = USHORT_TO_UBYTE(src2[i][RCOMP]);
1481 dst1[i][GCOMP] = USHORT_TO_UBYTE(src2[i][GCOMP]);
1482 dst1[i][BCOMP] = USHORT_TO_UBYTE(src2[i][BCOMP]);
1483 dst1[i][ACOMP] = USHORT_TO_UBYTE(src2[i][ACOMP]);
1484 }
1485 }
1486 if (useTemp)
1487 memcpy(dst, tempBuffer, count * 4 * sizeof(GLubyte));
1488 }
1489 else {
1490 const GLushort (*src2)[4] = (const GLushort (*)[4]) src;
1491 GLfloat (*dst4)[4] = (GLfloat (*)[4]) (useTemp ? tempBuffer : dst);
1492 GLuint i;
1493 ASSERT(dstType == GL_FLOAT);
1494 for (i = 0; i < count; i++) {
1495 if (!mask || mask[i]) {
1496 dst4[i][RCOMP] = USHORT_TO_FLOAT(src2[i][RCOMP]);
1497 dst4[i][GCOMP] = USHORT_TO_FLOAT(src2[i][GCOMP]);
1498 dst4[i][BCOMP] = USHORT_TO_FLOAT(src2[i][BCOMP]);
1499 dst4[i][ACOMP] = USHORT_TO_FLOAT(src2[i][ACOMP]);
1500 }
1501 }
1502 if (useTemp)
1503 memcpy(dst, tempBuffer, count * 4 * sizeof(GLfloat));
1504 }
1505 break;
1506 case GL_FLOAT:
1507 if (dstType == GL_UNSIGNED_BYTE) {
1508 const GLfloat (*src4)[4] = (const GLfloat (*)[4]) src;
1509 GLubyte (*dst1)[4] = (GLubyte (*)[4]) (useTemp ? tempBuffer : dst);
1510 GLuint i;
1511 for (i = 0; i < count; i++) {
1512 if (!mask || mask[i])
1513 _mesa_unclamped_float_rgba_to_ubyte(dst1[i], src4[i]);
1514 }
1515 if (useTemp)
1516 memcpy(dst, tempBuffer, count * 4 * sizeof(GLubyte));
1517 }
1518 else {
1519 const GLfloat (*src4)[4] = (const GLfloat (*)[4]) src;
1520 GLushort (*dst2)[4] = (GLushort (*)[4]) (useTemp ? tempBuffer : dst);
1521 GLuint i;
1522 ASSERT(dstType == GL_UNSIGNED_SHORT);
1523 for (i = 0; i < count; i++) {
1524 if (!mask || mask[i]) {
1525 UNCLAMPED_FLOAT_TO_USHORT(dst2[i][RCOMP], src4[i][RCOMP]);
1526 UNCLAMPED_FLOAT_TO_USHORT(dst2[i][GCOMP], src4[i][GCOMP]);
1527 UNCLAMPED_FLOAT_TO_USHORT(dst2[i][BCOMP], src4[i][BCOMP]);
1528 UNCLAMPED_FLOAT_TO_USHORT(dst2[i][ACOMP], src4[i][ACOMP]);
1529 }
1530 }
1531 if (useTemp)
1532 memcpy(dst, tempBuffer, count * 4 * sizeof(GLushort));
1533 }
1534 break;
1535 default:
1536 _mesa_problem(NULL, "Invalid datatype in _mesa_convert_colors");
1537 }
1538 }
1539
1540
1541
1542
1543 /**
1544 * Perform basic clipping for glDrawPixels. The image's position and size
1545 * and the unpack SkipPixels and SkipRows are adjusted so that the image
1546 * region is entirely within the window and scissor bounds.
1547 * NOTE: this will only work when glPixelZoom is (1, 1) or (1, -1).
1548 * If Pixel.ZoomY is -1, *destY will be changed to be the first row which
1549 * we'll actually write. Beforehand, *destY-1 is the first drawing row.
1550 *
1551 * \return GL_TRUE if image is ready for drawing or
1552 * GL_FALSE if image was completely clipped away (draw nothing)
1553 */
1554 GLboolean
1555 _mesa_clip_drawpixels(const struct gl_context *ctx,
1556 GLint *destX, GLint *destY,
1557 GLsizei *width, GLsizei *height,
1558 struct gl_pixelstore_attrib *unpack)
1559 {
1560 const struct gl_framebuffer *buffer = ctx->DrawBuffer;
1561
1562 if (unpack->RowLength == 0) {
1563 unpack->RowLength = *width;
1564 }
1565
1566 ASSERT(ctx->Pixel.ZoomX == 1.0F);
1567 ASSERT(ctx->Pixel.ZoomY == 1.0F || ctx->Pixel.ZoomY == -1.0F);
1568
1569 /* left clipping */
1570 if (*destX < buffer->_Xmin) {
1571 unpack->SkipPixels += (buffer->_Xmin - *destX);
1572 *width -= (buffer->_Xmin - *destX);
1573 *destX = buffer->_Xmin;
1574 }
1575 /* right clipping */
1576 if (*destX + *width > buffer->_Xmax)
1577 *width -= (*destX + *width - buffer->_Xmax);
1578
1579 if (*width <= 0)
1580 return GL_FALSE;
1581
1582 if (ctx->Pixel.ZoomY == 1.0F) {
1583 /* bottom clipping */
1584 if (*destY < buffer->_Ymin) {
1585 unpack->SkipRows += (buffer->_Ymin - *destY);
1586 *height -= (buffer->_Ymin - *destY);
1587 *destY = buffer->_Ymin;
1588 }
1589 /* top clipping */
1590 if (*destY + *height > buffer->_Ymax)
1591 *height -= (*destY + *height - buffer->_Ymax);
1592 }
1593 else { /* upside down */
1594 /* top clipping */
1595 if (*destY > buffer->_Ymax) {
1596 unpack->SkipRows += (*destY - buffer->_Ymax);
1597 *height -= (*destY - buffer->_Ymax);
1598 *destY = buffer->_Ymax;
1599 }
1600 /* bottom clipping */
1601 if (*destY - *height < buffer->_Ymin)
1602 *height -= (buffer->_Ymin - (*destY - *height));
1603 /* adjust destY so it's the first row to write to */
1604 (*destY)--;
1605 }
1606
1607 if (*height <= 0)
1608 return GL_FALSE;
1609
1610 return GL_TRUE;
1611 }
1612
1613
1614 /**
1615 * Perform clipping for glReadPixels. The image's window position
1616 * and size, and the pack skipPixels, skipRows and rowLength are adjusted
1617 * so that the image region is entirely within the window bounds.
1618 * Note: this is different from _mesa_clip_drawpixels() in that the
1619 * scissor box is ignored, and we use the bounds of the current readbuffer
1620 * surface.
1621 *
1622 * \return GL_TRUE if region to read is in bounds
1623 * GL_FALSE if region is completely out of bounds (nothing to read)
1624 */
1625 GLboolean
1626 _mesa_clip_readpixels(const struct gl_context *ctx,
1627 GLint *srcX, GLint *srcY,
1628 GLsizei *width, GLsizei *height,
1629 struct gl_pixelstore_attrib *pack)
1630 {
1631 const struct gl_framebuffer *buffer = ctx->ReadBuffer;
1632
1633 if (pack->RowLength == 0) {
1634 pack->RowLength = *width;
1635 }
1636
1637 /* left clipping */
1638 if (*srcX < 0) {
1639 pack->SkipPixels += (0 - *srcX);
1640 *width -= (0 - *srcX);
1641 *srcX = 0;
1642 }
1643 /* right clipping */
1644 if (*srcX + *width > (GLsizei) buffer->Width)
1645 *width -= (*srcX + *width - buffer->Width);
1646
1647 if (*width <= 0)
1648 return GL_FALSE;
1649
1650 /* bottom clipping */
1651 if (*srcY < 0) {
1652 pack->SkipRows += (0 - *srcY);
1653 *height -= (0 - *srcY);
1654 *srcY = 0;
1655 }
1656 /* top clipping */
1657 if (*srcY + *height > (GLsizei) buffer->Height)
1658 *height -= (*srcY + *height - buffer->Height);
1659
1660 if (*height <= 0)
1661 return GL_FALSE;
1662
1663 return GL_TRUE;
1664 }
1665
1666
1667 /**
1668 * Do clipping for a glCopyTexSubImage call.
1669 * The framebuffer source region might extend outside the framebuffer
1670 * bounds. Clip the source region against the framebuffer bounds and
1671 * adjust the texture/dest position and size accordingly.
1672 *
1673 * \return GL_FALSE if region is totally clipped, GL_TRUE otherwise.
1674 */
1675 GLboolean
1676 _mesa_clip_copytexsubimage(const struct gl_context *ctx,
1677 GLint *destX, GLint *destY,
1678 GLint *srcX, GLint *srcY,
1679 GLsizei *width, GLsizei *height)
1680 {
1681 const struct gl_framebuffer *fb = ctx->ReadBuffer;
1682 const GLint srcX0 = *srcX, srcY0 = *srcY;
1683
1684 if (_mesa_clip_to_region(0, 0, fb->Width, fb->Height,
1685 srcX, srcY, width, height)) {
1686 *destX = *destX + *srcX - srcX0;
1687 *destY = *destY + *srcY - srcY0;
1688
1689 return GL_TRUE;
1690 }
1691 else {
1692 return GL_FALSE;
1693 }
1694 }
1695
1696
1697
1698 /**
1699 * Clip the rectangle defined by (x, y, width, height) against the bounds
1700 * specified by [xmin, xmax) and [ymin, ymax).
1701 * \return GL_FALSE if rect is totally clipped, GL_TRUE otherwise.
1702 */
1703 GLboolean
1704 _mesa_clip_to_region(GLint xmin, GLint ymin,
1705 GLint xmax, GLint ymax,
1706 GLint *x, GLint *y,
1707 GLsizei *width, GLsizei *height )
1708 {
1709 /* left clipping */
1710 if (*x < xmin) {
1711 *width -= (xmin - *x);
1712 *x = xmin;
1713 }
1714
1715 /* right clipping */
1716 if (*x + *width > xmax)
1717 *width -= (*x + *width - xmax);
1718
1719 if (*width <= 0)
1720 return GL_FALSE;
1721
1722 /* bottom (or top) clipping */
1723 if (*y < ymin) {
1724 *height -= (ymin - *y);
1725 *y = ymin;
1726 }
1727
1728 /* top (or bottom) clipping */
1729 if (*y + *height > ymax)
1730 *height -= (*y + *height - ymax);
1731
1732 if (*height <= 0)
1733 return GL_FALSE;
1734
1735 return GL_TRUE;
1736 }
1737
1738
1739 /**
1740 * Clip dst coords against Xmax (or Ymax).
1741 */
1742 static inline void
1743 clip_right_or_top(GLint *srcX0, GLint *srcX1,
1744 GLint *dstX0, GLint *dstX1,
1745 GLint maxValue)
1746 {
1747 GLfloat t, bias;
1748
1749 if (*dstX1 > maxValue) {
1750 /* X1 outside right edge */
1751 ASSERT(*dstX0 < maxValue); /* X0 should be inside right edge */
1752 t = (GLfloat) (maxValue - *dstX0) / (GLfloat) (*dstX1 - *dstX0);
1753 /* chop off [t, 1] part */
1754 ASSERT(t >= 0.0 && t <= 1.0);
1755 *dstX1 = maxValue;
1756 bias = (*srcX0 < *srcX1) ? 0.5F : -0.5F;
1757 *srcX1 = *srcX0 + (GLint) (t * (*srcX1 - *srcX0) + bias);
1758 }
1759 else if (*dstX0 > maxValue) {
1760 /* X0 outside right edge */
1761 ASSERT(*dstX1 < maxValue); /* X1 should be inside right edge */
1762 t = (GLfloat) (maxValue - *dstX1) / (GLfloat) (*dstX0 - *dstX1);
1763 /* chop off [t, 1] part */
1764 ASSERT(t >= 0.0 && t <= 1.0);
1765 *dstX0 = maxValue;
1766 bias = (*srcX0 < *srcX1) ? -0.5F : 0.5F;
1767 *srcX0 = *srcX1 + (GLint) (t * (*srcX0 - *srcX1) + bias);
1768 }
1769 }
1770
1771
1772 /**
1773 * Clip dst coords against Xmin (or Ymin).
1774 */
1775 static inline void
1776 clip_left_or_bottom(GLint *srcX0, GLint *srcX1,
1777 GLint *dstX0, GLint *dstX1,
1778 GLint minValue)
1779 {
1780 GLfloat t, bias;
1781
1782 if (*dstX0 < minValue) {
1783 /* X0 outside left edge */
1784 ASSERT(*dstX1 > minValue); /* X1 should be inside left edge */
1785 t = (GLfloat) (minValue - *dstX0) / (GLfloat) (*dstX1 - *dstX0);
1786 /* chop off [0, t] part */
1787 ASSERT(t >= 0.0 && t <= 1.0);
1788 *dstX0 = minValue;
1789 bias = (*srcX0 < *srcX1) ? 0.5F : -0.5F; /* flipped??? */
1790 *srcX0 = *srcX0 + (GLint) (t * (*srcX1 - *srcX0) + bias);
1791 }
1792 else if (*dstX1 < minValue) {
1793 /* X1 outside left edge */
1794 ASSERT(*dstX0 > minValue); /* X0 should be inside left edge */
1795 t = (GLfloat) (minValue - *dstX1) / (GLfloat) (*dstX0 - *dstX1);
1796 /* chop off [0, t] part */
1797 ASSERT(t >= 0.0 && t <= 1.0);
1798 *dstX1 = minValue;
1799 bias = (*srcX0 < *srcX1) ? 0.5F : -0.5F;
1800 *srcX1 = *srcX1 + (GLint) (t * (*srcX0 - *srcX1) + bias);
1801 }
1802 }
1803
1804
1805 /**
1806 * Do clipping of blit src/dest rectangles.
1807 * The dest rect is clipped against both the buffer bounds and scissor bounds.
1808 * The src rect is just clipped against the buffer bounds.
1809 *
1810 * When either the src or dest rect is clipped, the other is also clipped
1811 * proportionately!
1812 *
1813 * Note that X0 need not be less than X1 (same for Y) for either the source
1814 * and dest rects. That makes the clipping a little trickier.
1815 *
1816 * \return GL_TRUE if anything is left to draw, GL_FALSE if totally clipped
1817 */
1818 GLboolean
1819 _mesa_clip_blit(struct gl_context *ctx,
1820 GLint *srcX0, GLint *srcY0, GLint *srcX1, GLint *srcY1,
1821 GLint *dstX0, GLint *dstY0, GLint *dstX1, GLint *dstY1)
1822 {
1823 const GLint srcXmin = 0;
1824 const GLint srcXmax = ctx->ReadBuffer->Width;
1825 const GLint srcYmin = 0;
1826 const GLint srcYmax = ctx->ReadBuffer->Height;
1827
1828 /* these include scissor bounds */
1829 const GLint dstXmin = ctx->DrawBuffer->_Xmin;
1830 const GLint dstXmax = ctx->DrawBuffer->_Xmax;
1831 const GLint dstYmin = ctx->DrawBuffer->_Ymin;
1832 const GLint dstYmax = ctx->DrawBuffer->_Ymax;
1833
1834 /*
1835 printf("PreClipX: src: %d .. %d dst: %d .. %d\n",
1836 *srcX0, *srcX1, *dstX0, *dstX1);
1837 printf("PreClipY: src: %d .. %d dst: %d .. %d\n",
1838 *srcY0, *srcY1, *dstY0, *dstY1);
1839 */
1840
1841 /* trivial rejection tests */
1842 if (*dstX0 == *dstX1)
1843 return GL_FALSE; /* no width */
1844 if (*dstX0 <= dstXmin && *dstX1 <= dstXmin)
1845 return GL_FALSE; /* totally out (left) of bounds */
1846 if (*dstX0 >= dstXmax && *dstX1 >= dstXmax)
1847 return GL_FALSE; /* totally out (right) of bounds */
1848
1849 if (*dstY0 == *dstY1)
1850 return GL_FALSE;
1851 if (*dstY0 <= dstYmin && *dstY1 <= dstYmin)
1852 return GL_FALSE;
1853 if (*dstY0 >= dstYmax && *dstY1 >= dstYmax)
1854 return GL_FALSE;
1855
1856 if (*srcX0 == *srcX1)
1857 return GL_FALSE;
1858 if (*srcX0 <= srcXmin && *srcX1 <= srcXmin)
1859 return GL_FALSE;
1860 if (*srcX0 >= srcXmax && *srcX1 >= srcXmax)
1861 return GL_FALSE;
1862
1863 if (*srcY0 == *srcY1)
1864 return GL_FALSE;
1865 if (*srcY0 <= srcYmin && *srcY1 <= srcYmin)
1866 return GL_FALSE;
1867 if (*srcY0 >= srcYmax && *srcY1 >= srcYmax)
1868 return GL_FALSE;
1869
1870 /*
1871 * dest clip
1872 */
1873 clip_right_or_top(srcX0, srcX1, dstX0, dstX1, dstXmax);
1874 clip_right_or_top(srcY0, srcY1, dstY0, dstY1, dstYmax);
1875 clip_left_or_bottom(srcX0, srcX1, dstX0, dstX1, dstXmin);
1876 clip_left_or_bottom(srcY0, srcY1, dstY0, dstY1, dstYmin);
1877
1878 /*
1879 * src clip (just swap src/dst values from above)
1880 */
1881 clip_right_or_top(dstX0, dstX1, srcX0, srcX1, srcXmax);
1882 clip_right_or_top(dstY0, dstY1, srcY0, srcY1, srcYmax);
1883 clip_left_or_bottom(dstX0, dstX1, srcX0, srcX1, srcXmin);
1884 clip_left_or_bottom(dstY0, dstY1, srcY0, srcY1, srcYmin);
1885
1886 /*
1887 printf("PostClipX: src: %d .. %d dst: %d .. %d\n",
1888 *srcX0, *srcX1, *dstX0, *dstX1);
1889 printf("PostClipY: src: %d .. %d dst: %d .. %d\n",
1890 *srcY0, *srcY1, *dstY0, *dstY1);
1891 */
1892
1893 ASSERT(*dstX0 >= dstXmin);
1894 ASSERT(*dstX0 <= dstXmax);
1895 ASSERT(*dstX1 >= dstXmin);
1896 ASSERT(*dstX1 <= dstXmax);
1897
1898 ASSERT(*dstY0 >= dstYmin);
1899 ASSERT(*dstY0 <= dstYmax);
1900 ASSERT(*dstY1 >= dstYmin);
1901 ASSERT(*dstY1 <= dstYmax);
1902
1903 ASSERT(*srcX0 >= srcXmin);
1904 ASSERT(*srcX0 <= srcXmax);
1905 ASSERT(*srcX1 >= srcXmin);
1906 ASSERT(*srcX1 <= srcXmax);
1907
1908 ASSERT(*srcY0 >= srcYmin);
1909 ASSERT(*srcY0 <= srcYmax);
1910 ASSERT(*srcY1 >= srcYmin);
1911 ASSERT(*srcY1 <= srcYmax);
1912
1913 return GL_TRUE;
1914 }