1 /*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 #include "glUtils.h"
17 #include <string.h>
18 #include "ErrorLog.h"
19 #include <IOStream.h>
20
21 #include <GLES3/gl31.h>
22
glSizeof(GLenum type)23 size_t glSizeof(GLenum type)
24 {
25 size_t retval = 0;
26 switch(type) {
27 case GL_BYTE:
28 case GL_UNSIGNED_BYTE:
29 retval = 1;
30 break;
31 case GL_SHORT:
32 case GL_UNSIGNED_SHORT:
33 case GL_HALF_FLOAT:
34 case GL_HALF_FLOAT_OES:
35 retval = 2;
36 break;
37 case GL_IMAGE_2D:
38 case GL_IMAGE_3D:
39 case GL_UNSIGNED_INT:
40 case GL_INT:
41 case GL_FLOAT:
42 case GL_FIXED:
43 case GL_BOOL:
44 retval = 4;
45 break;
46 #ifdef GL_DOUBLE
47 case GL_DOUBLE:
48 retval = 8;
49 break;
50 #endif
51 case GL_FLOAT_VEC2:
52 case GL_INT_VEC2:
53 case GL_UNSIGNED_INT_VEC2:
54 case GL_BOOL_VEC2:
55 retval = 8;
56 break;
57 case GL_INT_VEC3:
58 case GL_UNSIGNED_INT_VEC3:
59 case GL_BOOL_VEC3:
60 case GL_FLOAT_VEC3:
61 retval = 12;
62 break;
63 case GL_FLOAT_VEC4:
64 case GL_BOOL_VEC4:
65 case GL_INT_VEC4:
66 case GL_UNSIGNED_INT_VEC4:
67 case GL_FLOAT_MAT2:
68 retval = 16;
69 break;
70 case GL_FLOAT_MAT3:
71 retval = 36;
72 break;
73 case GL_FLOAT_MAT4:
74 retval = 64;
75 break;
76 case GL_FLOAT_MAT2x3:
77 case GL_FLOAT_MAT3x2:
78 retval = 4 * 6;
79 break;
80 case GL_FLOAT_MAT2x4:
81 case GL_FLOAT_MAT4x2:
82 retval = 4 * 8;
83 break;
84 case GL_FLOAT_MAT3x4:
85 case GL_FLOAT_MAT4x3:
86 retval = 4 * 12;
87 break;
88 case GL_SAMPLER_2D:
89 case GL_SAMPLER_3D:
90 case GL_SAMPLER_CUBE:
91 retval = 4;
92 break;
93 case GL_UNSIGNED_SHORT_4_4_4_4:
94 case GL_UNSIGNED_SHORT_5_5_5_1:
95 case GL_UNSIGNED_SHORT_5_6_5:
96 case GL_UNSIGNED_SHORT_4_4_4_4_REV_EXT:
97 case GL_UNSIGNED_SHORT_1_5_5_5_REV_EXT:
98 retval = 2;
99 break;
100 case GL_INT_2_10_10_10_REV:
101 case GL_UNSIGNED_INT_10F_11F_11F_REV:
102 case GL_UNSIGNED_INT_5_9_9_9_REV:
103 case GL_UNSIGNED_INT_2_10_10_10_REV:
104 case GL_UNSIGNED_INT_24_8_OES:;
105 retval = 4;
106 break;
107 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
108 retval = 4 + 4;
109 break;
110 default:
111 ALOGE("**** ERROR unknown type 0x%x (%s,%d)\n", type, __FUNCTION__,__LINE__);
112 retval = 4;
113 }
114 return retval;
115
116 }
117
glUtilsParamSize(GLenum param)118 size_t glUtilsParamSize(GLenum param)
119 {
120 size_t s = 0;
121
122 switch(param)
123 {
124 case GL_DEPTH_TEST:
125 case GL_DEPTH_FUNC:
126 case GL_DEPTH_BITS:
127 case GL_MAX_CLIP_PLANES:
128 case GL_MAX_COLOR_ATTACHMENTS:
129 case GL_MAX_DRAW_BUFFERS:
130 case GL_GREEN_BITS:
131 case GL_MAX_MODELVIEW_STACK_DEPTH:
132 case GL_MAX_PROJECTION_STACK_DEPTH:
133 case GL_MAX_TEXTURE_STACK_DEPTH:
134 case GL_IMPLEMENTATION_COLOR_READ_FORMAT_OES:
135 case GL_IMPLEMENTATION_COLOR_READ_TYPE_OES:
136 case GL_NUM_COMPRESSED_TEXTURE_FORMATS:
137 case GL_MAX_TEXTURE_SIZE:
138 case GL_TEXTURE_GEN_MODE_OES:
139 case GL_TEXTURE_ENV_MODE:
140 case GL_FOG_MODE:
141 case GL_FOG_DENSITY:
142 case GL_FOG_START:
143 case GL_FOG_END:
144 case GL_SPOT_EXPONENT:
145 case GL_CONSTANT_ATTENUATION:
146 case GL_LINEAR_ATTENUATION:
147 case GL_QUADRATIC_ATTENUATION:
148 case GL_SHININESS:
149 case GL_LIGHT_MODEL_TWO_SIDE:
150 case GL_POINT_SIZE:
151 case GL_POINT_SIZE_MIN:
152 case GL_POINT_SIZE_MAX:
153 case GL_POINT_FADE_THRESHOLD_SIZE:
154 case GL_CULL_FACE:
155 case GL_CULL_FACE_MODE:
156 case GL_FRONT_FACE:
157 case GL_SHADE_MODEL:
158 case GL_DEPTH_WRITEMASK:
159 case GL_DEPTH_CLEAR_VALUE:
160 case GL_STENCIL_FAIL:
161 case GL_STENCIL_PASS_DEPTH_FAIL:
162 case GL_STENCIL_PASS_DEPTH_PASS:
163 case GL_STENCIL_REF:
164 case GL_STENCIL_WRITEMASK:
165 case GL_MATRIX_MODE:
166 case GL_MODELVIEW_STACK_DEPTH:
167 case GL_PROJECTION_STACK_DEPTH:
168 case GL_TEXTURE_STACK_DEPTH:
169 case GL_ALPHA_TEST_FUNC:
170 case GL_ALPHA_TEST_REF:
171 case GL_ALPHA_TEST:
172 case GL_DITHER:
173 case GL_BLEND_DST:
174 case GL_BLEND_SRC:
175 case GL_BLEND:
176 case GL_LOGIC_OP_MODE:
177 case GL_SCISSOR_TEST:
178 case GL_MAX_TEXTURE_UNITS:
179 case GL_ACTIVE_TEXTURE:
180 case GL_ALPHA_BITS:
181 case GL_ARRAY_BUFFER_BINDING:
182 case GL_BLUE_BITS:
183 case GL_CLIENT_ACTIVE_TEXTURE:
184 case GL_CLIP_PLANE0:
185 case GL_CLIP_PLANE1:
186 case GL_CLIP_PLANE2:
187 case GL_CLIP_PLANE3:
188 case GL_CLIP_PLANE4:
189 case GL_CLIP_PLANE5:
190 case GL_COLOR_ARRAY:
191 case GL_COLOR_ARRAY_BUFFER_BINDING:
192 case GL_COLOR_ARRAY_SIZE:
193 case GL_COLOR_ARRAY_STRIDE:
194 case GL_COLOR_ARRAY_TYPE:
195 case GL_COLOR_LOGIC_OP:
196 case GL_COLOR_MATERIAL:
197 case GL_PACK_ALIGNMENT:
198 case GL_PERSPECTIVE_CORRECTION_HINT:
199 case GL_POINT_SIZE_ARRAY_BUFFER_BINDING_OES:
200 case GL_POINT_SIZE_ARRAY_STRIDE_OES:
201 case GL_POINT_SIZE_ARRAY_TYPE_OES:
202 case GL_POINT_SMOOTH:
203 case GL_POINT_SMOOTH_HINT:
204 case GL_POINT_SPRITE_OES:
205 case GL_COORD_REPLACE_OES:
206 case GL_COMBINE_ALPHA:
207 case GL_SRC0_RGB:
208 case GL_SRC1_RGB:
209 case GL_SRC2_RGB:
210 case GL_OPERAND0_RGB:
211 case GL_OPERAND1_RGB:
212 case GL_OPERAND2_RGB:
213 case GL_SRC0_ALPHA:
214 case GL_SRC1_ALPHA:
215 case GL_SRC2_ALPHA:
216 case GL_OPERAND0_ALPHA:
217 case GL_OPERAND1_ALPHA:
218 case GL_OPERAND2_ALPHA:
219 case GL_RGB_SCALE:
220 case GL_ALPHA_SCALE:
221 case GL_COMBINE_RGB:
222 case GL_POLYGON_OFFSET_FACTOR:
223 case GL_POLYGON_OFFSET_FILL:
224 case GL_POLYGON_OFFSET_UNITS:
225 case GL_RED_BITS:
226 case GL_RESCALE_NORMAL:
227 case GL_SAMPLE_ALPHA_TO_COVERAGE:
228 case GL_SAMPLE_ALPHA_TO_ONE:
229 case GL_SAMPLE_BUFFERS:
230 case GL_SAMPLE_COVERAGE:
231 case GL_SAMPLE_COVERAGE_INVERT:
232 case GL_SAMPLE_COVERAGE_VALUE:
233 case GL_SAMPLES:
234 case GL_MAX_SAMPLES_EXT:
235 case GL_STENCIL_BITS:
236 case GL_STENCIL_CLEAR_VALUE:
237 case GL_STENCIL_FUNC:
238 case GL_STENCIL_TEST:
239 case GL_STENCIL_VALUE_MASK:
240 case GL_STENCIL_BACK_FUNC:
241 case GL_STENCIL_BACK_VALUE_MASK:
242 case GL_STENCIL_BACK_REF:
243 case GL_STENCIL_BACK_FAIL:
244 case GL_STENCIL_BACK_PASS_DEPTH_FAIL:
245 case GL_STENCIL_BACK_PASS_DEPTH_PASS:
246 case GL_STENCIL_BACK_WRITEMASK:
247 case GL_TEXTURE_2D:
248 case GL_TEXTURE_BASE_LEVEL:
249 case GL_TEXTURE_BINDING_2D:
250 case GL_TEXTURE_BINDING_CUBE_MAP:
251 case GL_TEXTURE_BINDING_EXTERNAL_OES:
252 case GL_TEXTURE_COMPARE_FUNC:
253 case GL_TEXTURE_COMPARE_MODE:
254 case GL_TEXTURE_COORD_ARRAY:
255 case GL_TEXTURE_COORD_ARRAY_BUFFER_BINDING:
256 case GL_TEXTURE_COORD_ARRAY_SIZE:
257 case GL_TEXTURE_COORD_ARRAY_STRIDE:
258 case GL_TEXTURE_COORD_ARRAY_TYPE:
259 case GL_TEXTURE_IMMUTABLE_FORMAT:
260 case GL_UNPACK_ALIGNMENT:
261 case GL_VERTEX_ARRAY:
262 case GL_VERTEX_ARRAY_BUFFER_BINDING:
263 case GL_VERTEX_ARRAY_SIZE:
264 case GL_VERTEX_ARRAY_STRIDE:
265 case GL_VERTEX_ARRAY_TYPE:
266 case GL_SPOT_CUTOFF:
267 case GL_TEXTURE_MIN_FILTER:
268 case GL_TEXTURE_MAG_FILTER:
269 case GL_TEXTURE_MAX_LOD:
270 case GL_TEXTURE_MIN_LOD:
271 case GL_TEXTURE_WRAP_S:
272 case GL_TEXTURE_WRAP_T:
273 case GL_TEXTURE_WRAP_R:
274 case GL_TEXTURE_SWIZZLE_R:
275 case GL_TEXTURE_SWIZZLE_G:
276 case GL_TEXTURE_SWIZZLE_B:
277 case GL_TEXTURE_SWIZZLE_A:
278 case GL_GENERATE_MIPMAP:
279 case GL_GENERATE_MIPMAP_HINT:
280 case GL_RENDERBUFFER_WIDTH_OES:
281 case GL_RENDERBUFFER_HEIGHT_OES:
282 case GL_RENDERBUFFER_INTERNAL_FORMAT_OES:
283 case GL_RENDERBUFFER_RED_SIZE_OES:
284 case GL_RENDERBUFFER_GREEN_SIZE_OES:
285 case GL_RENDERBUFFER_BLUE_SIZE_OES:
286 case GL_RENDERBUFFER_ALPHA_SIZE_OES:
287 case GL_RENDERBUFFER_DEPTH_SIZE_OES:
288 case GL_RENDERBUFFER_STENCIL_SIZE_OES:
289 case GL_RENDERBUFFER_BINDING:
290 case GL_FRAMEBUFFER_BINDING:
291 case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE_OES:
292 case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME_OES:
293 case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL_OES:
294 case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE_OES:
295 case GL_FENCE_STATUS_NV:
296 case GL_FENCE_CONDITION_NV:
297 case GL_TEXTURE_WIDTH_QCOM:
298 case GL_TEXTURE_HEIGHT_QCOM:
299 case GL_TEXTURE_DEPTH_QCOM:
300 case GL_TEXTURE_INTERNAL_FORMAT_QCOM:
301 case GL_TEXTURE_FORMAT_QCOM:
302 case GL_TEXTURE_TYPE_QCOM:
303 case GL_TEXTURE_IMAGE_VALID_QCOM:
304 case GL_TEXTURE_NUM_LEVELS_QCOM:
305 case GL_TEXTURE_TARGET_QCOM:
306 case GL_TEXTURE_OBJECT_VALID_QCOM:
307 case GL_BLEND_EQUATION_RGB_OES:
308 case GL_BLEND_EQUATION_ALPHA_OES:
309 case GL_BLEND_DST_RGB_OES:
310 case GL_BLEND_SRC_RGB_OES:
311 case GL_BLEND_DST_ALPHA_OES:
312 case GL_BLEND_SRC_ALPHA_OES:
313 case GL_MAX_LIGHTS:
314 case GL_SHADER_TYPE:
315 case GL_COMPILE_STATUS:
316 case GL_SHADER_SOURCE_LENGTH:
317 case GL_CURRENT_PROGRAM:
318 case GL_SUBPIXEL_BITS:
319 case GL_MAX_3D_TEXTURE_SIZE:
320 case GL_MAX_ARRAY_TEXTURE_LAYERS:
321 case GL_MAX_CUBE_MAP_TEXTURE_SIZE:
322 case GL_NUM_SHADER_BINARY_FORMATS:
323 case GL_SHADER_COMPILER:
324 case GL_MAX_VERTEX_ATTRIBS:
325 case GL_MAX_VERTEX_UNIFORM_VECTORS:
326 case GL_MAX_VARYING_VECTORS:
327 case GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS:
328 case GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS:
329 case GL_MAX_FRAGMENT_UNIFORM_VECTORS:
330 case GL_MAX_RENDERBUFFER_SIZE:
331 case GL_MAX_TEXTURE_IMAGE_UNITS:
332 case GL_REQUIRED_TEXTURE_IMAGE_UNITS_OES:
333 case GL_FRAGMENT_SHADER_DERIVATIVE_HINT_OES:
334 case GL_LINE_WIDTH:
335 case GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS:
336 case GL_MAX_UNIFORM_BUFFER_BINDINGS:
337 case GL_MAX_ATOMIC_COUNTER_BUFFER_BINDINGS:
338 case GL_MAX_SHADER_STORAGE_BUFFER_BINDINGS:
339 case GL_UNIFORM_BLOCK_BINDING:
340 case GL_UNIFORM_BLOCK_DATA_SIZE:
341 case GL_UNIFORM_BLOCK_NAME_LENGTH:
342 case GL_UNIFORM_BLOCK_ACTIVE_UNIFORMS:
343 case GL_UNIFORM_BLOCK_REFERENCED_BY_VERTEX_SHADER:
344 case GL_UNIFORM_BLOCK_REFERENCED_BY_FRAGMENT_SHADER:
345 case GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT:
346 case GL_CURRENT_QUERY:
347 case GL_QUERY_RESULT:
348 case GL_QUERY_RESULT_AVAILABLE:
349 case GL_READ_BUFFER:
350 case GL_NUM_PROGRAM_BINARY_FORMATS:
351 case GL_PROGRAM_BINARY_FORMATS:
352
353 case GL_ACTIVE_ATOMIC_COUNTER_BUFFERS:
354 case GL_ACTIVE_ATTRIBUTES:
355 case GL_ACTIVE_ATTRIBUTE_MAX_LENGTH:
356 case GL_ACTIVE_UNIFORM_BLOCKS:
357 case GL_ACTIVE_UNIFORM_BLOCK_MAX_NAME_LENGTH:
358 case GL_ACTIVE_UNIFORMS:
359 case GL_ACTIVE_UNIFORM_MAX_LENGTH:
360 case GL_ATTACHED_SHADERS:
361 case GL_DELETE_STATUS:
362 case GL_INFO_LOG_LENGTH:
363 case GL_LINK_STATUS:
364 case GL_PROGRAM_BINARY_LENGTH:
365 case GL_PROGRAM_BINARY_RETRIEVABLE_HINT:
366 case GL_PROGRAM_SEPARABLE:
367 case GL_SHADER_STORAGE_BUFFER_OFFSET_ALIGNMENT:
368 case GL_TRANSFORM_FEEDBACK_BUFFER_MODE:
369 case GL_TRANSFORM_FEEDBACK_VARYINGS:
370 case GL_TRANSFORM_FEEDBACK_VARYING_MAX_LENGTH:
371 case GL_TRANSFORM_FEEDBACK_ACTIVE:
372 #define GL_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS 0x8C8A
373 #define GL_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS 0x8C80
374 case GL_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS:
375 case GL_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS:
376 case GL_VALIDATE_STATUS:
377 s = 1;
378 break;
379 case GL_ALIASED_LINE_WIDTH_RANGE:
380 case GL_ALIASED_POINT_SIZE_RANGE:
381 case GL_DEPTH_RANGE:
382 case GL_MAX_VIEWPORT_DIMS:
383 case GL_SMOOTH_POINT_SIZE_RANGE:
384 case GL_SMOOTH_LINE_WIDTH_RANGE:
385 case GL_SAMPLE_POSITION:
386 s= 2;
387 break;
388 case GL_SPOT_DIRECTION:
389 case GL_POINT_DISTANCE_ATTENUATION:
390 case GL_CURRENT_NORMAL:
391 case GL_COMPUTE_WORK_GROUP_SIZE:
392 s = 3;
393 break;
394 case GL_CURRENT_VERTEX_ATTRIB:
395 case GL_CURRENT_TEXTURE_COORDS:
396 case GL_CURRENT_COLOR:
397 case GL_FOG_COLOR:
398 case GL_AMBIENT:
399 case GL_DIFFUSE:
400 case GL_SPECULAR:
401 case GL_EMISSION:
402 case GL_POSITION:
403 case GL_LIGHT_MODEL_AMBIENT:
404 case GL_TEXTURE_ENV_COLOR:
405 case GL_SCISSOR_BOX:
406 case GL_VIEWPORT:
407 case GL_TEXTURE_CROP_RECT_OES:
408 case GL_COLOR_CLEAR_VALUE:
409 case GL_COLOR_WRITEMASK:
410 case GL_AMBIENT_AND_DIFFUSE:
411 case GL_BLEND_COLOR:
412 s = 4;
413 break;
414 case GL_MODELVIEW_MATRIX:
415 case GL_PROJECTION_MATRIX:
416 case GL_TEXTURE_MATRIX:
417 s = 16;
418 break;
419 default:
420 s = 1; // assume 1 for everything else
421 }
422 return s;
423 }
424
glUtilsPackPointerData(unsigned char * dst,unsigned char * src,int size,GLenum type,unsigned int stride,unsigned int datalen)425 void glUtilsPackPointerData(unsigned char *dst, unsigned char *src,
426 int size, GLenum type, unsigned int stride,
427 unsigned int datalen)
428 {
429 unsigned int vsize = size * glSizeof(type);
430 switch (type) {
431 case GL_INT_2_10_10_10_REV:
432 case GL_UNSIGNED_INT_2_10_10_10_REV:
433 vsize = vsize / 4;
434 break;
435 default:
436 break;
437 }
438
439 if (stride == 0) stride = vsize;
440
441 if (stride == vsize) {
442 memcpy(dst, src, datalen);
443 } else {
444 for (unsigned int i = 0; i < datalen; i += vsize) {
445 memcpy(dst, src, vsize);
446 dst += vsize;
447 src += stride;
448 }
449 }
450 }
451
glUtilsWritePackPointerData(void * _stream,unsigned char * src,int size,GLenum type,unsigned int stride,unsigned int datalen)452 void glUtilsWritePackPointerData(void* _stream, unsigned char *src,
453 int size, GLenum type, unsigned int stride,
454 unsigned int datalen)
455 {
456 IOStream* stream = reinterpret_cast<IOStream*>(_stream);
457
458 unsigned int vsize = size * glSizeof(type);
459 if (stride == 0) stride = vsize;
460
461 if (stride == vsize) {
462 stream->writeFully(src, datalen);
463 } else {
464 for (unsigned int i = 0; i < datalen; i += vsize) {
465 stream->writeFully(src, (size_t)vsize);
466 src += stride;
467 }
468 }
469 }
470
471 #ifndef GL_RGBA16F
472 #define GL_RGBA16F 0x881A
473 #endif // GL_RGBA16F
474
glUtilsPixelBitSize(GLenum format,GLenum type)475 int glUtilsPixelBitSize(GLenum format, GLenum type)
476 {
477 int components = 0;
478 int componentsize = 0;
479 int pixelsize = 0;
480 switch(type) {
481 case GL_BYTE:
482 case GL_UNSIGNED_BYTE:
483 componentsize = 8;
484 break;
485 case GL_SHORT:
486 case GL_HALF_FLOAT:
487 case GL_UNSIGNED_SHORT:
488 componentsize = 16;
489 break;
490 case GL_INT:
491 case GL_UNSIGNED_INT:
492 case GL_FLOAT:
493 case GL_FIXED:
494 componentsize = 32;
495 break;
496 case GL_UNSIGNED_SHORT_5_6_5:
497 case GL_UNSIGNED_SHORT_4_4_4_4:
498 case GL_UNSIGNED_SHORT_5_5_5_1:
499 case GL_RGB565_OES:
500 case GL_RGB5_A1_OES:
501 case GL_RGBA4_OES:
502 pixelsize = 16;
503 break;
504 case GL_UNSIGNED_INT_2_10_10_10_REV:
505 case GL_UNSIGNED_INT_24_8_OES:
506 pixelsize = 32;
507 break;
508 default:
509 ERR("glUtilsPixelBitSize: unknown pixel type %d - assuming pixel data 0\n", type);
510 componentsize = 0;
511 }
512
513 if (pixelsize == 0) {
514 switch(format) {
515 #if 0
516 case GL_RED:
517 case GL_GREEN:
518 case GL_BLUE:
519 #endif
520 case GL_ALPHA:
521 case GL_LUMINANCE:
522 case GL_DEPTH_COMPONENT:
523 case GL_DEPTH_STENCIL_OES:
524 components = 1;
525 break;
526 case GL_LUMINANCE_ALPHA:
527 components = 2;
528 break;
529 case GL_RGB:
530 #if 0
531 case GL_BGR:
532 #endif
533 components = 3;
534 break;
535 case GL_RGBA:
536 case GL_BGRA_EXT:
537 components = 4;
538 break;
539 case GL_RGBA16F:
540 pixelsize = 64;
541 break;
542 default:
543 ERR("glUtilsPixelBitSize: unknown pixel format %d\n", format);
544 components = 0;
545 }
546 if (pixelsize == 0) {
547 pixelsize = components * componentsize;
548 }
549 }
550
551 return pixelsize;
552 }
553
554 // pack a list of strings into one.
glUtilsPackStrings(char * ptr,char ** strings,GLint * length,GLsizei count)555 void glUtilsPackStrings(char *ptr, char **strings, GLint *length, GLsizei count)
556 {
557 char *p = ptr;
558 *p = '\0';
559 for (int i = 0; i < count; i++) {
560 int l=0;
561 if (strings[i]!=NULL) {
562 if (length == NULL || length[i] < 0) {
563 l = strlen(strings[i]);
564 strcat(p, strings[i]);
565 } else {
566 l = length[i];
567 strncat(p, strings[i], l);
568 }
569 }
570 p += l;
571 }
572 }
573
574 // claculate the length of a list of strings
glUtilsCalcShaderSourceLen(char ** strings,GLint * length,GLsizei count)575 int glUtilsCalcShaderSourceLen( char **strings, GLint *length, GLsizei count)
576 {
577 int len = 0;
578 for (int i = 0; i < count; i++) {
579 int l;
580 if (length == NULL || length[i] < 0) {
581 l = strings[i]!=NULL ? strlen(strings[i]) : 0;
582 } else {
583 l = length[i];
584 }
585 len += l;
586 }
587 return len;
588
589 }
590
591 // helper to get GL_COLOR_ATTACHMENTn names
glUtilsColorAttachmentName(int i)592 GLenum glUtilsColorAttachmentName(int i) {
593 #undef COLOR_ATTACHMENT_CASE
594 #define COLOR_ATTACHMENT_CASE(i) \
595 case i: \
596 return GL_COLOR_ATTACHMENT##i; \
597
598 switch (i) {
599 COLOR_ATTACHMENT_CASE(0)
600 COLOR_ATTACHMENT_CASE(1)
601 COLOR_ATTACHMENT_CASE(2)
602 COLOR_ATTACHMENT_CASE(3)
603 COLOR_ATTACHMENT_CASE(4)
604 COLOR_ATTACHMENT_CASE(5)
605 COLOR_ATTACHMENT_CASE(6)
606 COLOR_ATTACHMENT_CASE(7)
607 COLOR_ATTACHMENT_CASE(8)
608 COLOR_ATTACHMENT_CASE(9)
609 COLOR_ATTACHMENT_CASE(10)
610 COLOR_ATTACHMENT_CASE(11)
611 COLOR_ATTACHMENT_CASE(12)
612 COLOR_ATTACHMENT_CASE(13)
613 COLOR_ATTACHMENT_CASE(14)
614 COLOR_ATTACHMENT_CASE(15)
615 }
616 return GL_NONE;
617 #undef COLOR_ATTACHMENT_CASE
618 }
619
glUtilsColorAttachmentIndex(GLenum attachment)620 int glUtilsColorAttachmentIndex(GLenum attachment) {
621 #undef COLOR_ATTACHMENT_CASE
622 #define COLOR_ATTACHMENT_CASE(i) \
623 case GL_COLOR_ATTACHMENT##i: \
624 return i; \
625
626 switch (attachment) {
627 COLOR_ATTACHMENT_CASE(0)
628 COLOR_ATTACHMENT_CASE(1)
629 COLOR_ATTACHMENT_CASE(2)
630 COLOR_ATTACHMENT_CASE(3)
631 COLOR_ATTACHMENT_CASE(4)
632 COLOR_ATTACHMENT_CASE(5)
633 COLOR_ATTACHMENT_CASE(6)
634 COLOR_ATTACHMENT_CASE(7)
635 COLOR_ATTACHMENT_CASE(8)
636 COLOR_ATTACHMENT_CASE(9)
637 COLOR_ATTACHMENT_CASE(10)
638 COLOR_ATTACHMENT_CASE(11)
639 COLOR_ATTACHMENT_CASE(12)
640 COLOR_ATTACHMENT_CASE(13)
641 COLOR_ATTACHMENT_CASE(14)
642 COLOR_ATTACHMENT_CASE(15)
643 }
644 return -1;
645 #undef COLOR_ATTACHMENT_CASE
646 }
647
648 struct glUtilsDrawArraysIndirectCommand {
649 GLuint count;
650 GLuint primCount;
651 GLuint first;
652 GLuint reserved;
653 };
654
655 struct glUtilsDrawElementsIndirectCommand {
656 GLuint count;
657 GLuint primCount;
658 GLuint first;
659 GLint baseVertex;
660 GLuint reserved;
661 };
662
glUtilsIndirectStructSize(IndirectCommandType cmdType)663 GLuint glUtilsIndirectStructSize(IndirectCommandType cmdType) {
664 switch (cmdType) {
665 case INDIRECT_COMMAND_DRAWARRAYS:
666 return sizeof(glUtilsDrawArraysIndirectCommand);
667 case INDIRECT_COMMAND_DRAWELEMENTS:
668 return sizeof(glUtilsDrawElementsIndirectCommand);
669 }
670 return 4;
671 }
672