1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 // This file is here so other GLES2 related files can have a common set of
6 // includes where appropriate.
7
8 #include <sstream>
9 #include <GLES2/gl2.h>
10 #include <GLES2/gl2ext.h>
11 #include <GLES2/gl2extchromium.h>
12
13 #include "gpu/command_buffer/common/gles2_cmd_format.h"
14 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
15
16 namespace gpu {
17 namespace gles2 {
18
19 namespace gl_error_bit {
20 enum GLErrorBit {
21 kNoError = 0,
22 kInvalidEnum = (1 << 0),
23 kInvalidValue = (1 << 1),
24 kInvalidOperation = (1 << 2),
25 kOutOfMemory = (1 << 3),
26 kInvalidFrameBufferOperation = (1 << 4)
27 };
28 }
29
GLGetNumValuesReturned(int id) const30 int GLES2Util::GLGetNumValuesReturned(int id) const {
31 switch (id) {
32 // -- glGetBooleanv, glGetFloatv, glGetIntergerv
33 case GL_ACTIVE_TEXTURE:
34 return 1;
35 case GL_ALIASED_LINE_WIDTH_RANGE:
36 return 2;
37 case GL_ALIASED_POINT_SIZE_RANGE:
38 return 2;
39 case GL_ALPHA_BITS:
40 return 1;
41 case GL_ARRAY_BUFFER_BINDING:
42 return 1;
43 case GL_BLEND:
44 return 1;
45 case GL_BLEND_COLOR:
46 return 4;
47 case GL_BLEND_DST_ALPHA:
48 return 1;
49 case GL_BLEND_DST_RGB:
50 return 1;
51 case GL_BLEND_EQUATION_ALPHA:
52 return 1;
53 case GL_BLEND_EQUATION_RGB:
54 return 1;
55 case GL_BLEND_SRC_ALPHA:
56 return 1;
57 case GL_BLEND_SRC_RGB:
58 return 1;
59 case GL_BLUE_BITS:
60 return 1;
61 case GL_COLOR_CLEAR_VALUE:
62 return 4;
63 case GL_COLOR_WRITEMASK:
64 return 4;
65 case GL_COMPRESSED_TEXTURE_FORMATS:
66 return num_compressed_texture_formats_;
67 case GL_CULL_FACE:
68 return 1;
69 case GL_CULL_FACE_MODE:
70 return 1;
71 case GL_CURRENT_PROGRAM:
72 return 1;
73 case GL_DEPTH_BITS:
74 return 1;
75 case GL_DEPTH_CLEAR_VALUE:
76 return 1;
77 case GL_DEPTH_FUNC:
78 return 1;
79 case GL_DEPTH_RANGE:
80 return 2;
81 case GL_DEPTH_TEST:
82 return 1;
83 case GL_DEPTH_WRITEMASK:
84 return 1;
85 case GL_DITHER:
86 return 1;
87 case GL_ELEMENT_ARRAY_BUFFER_BINDING:
88 return 1;
89 case GL_FRAMEBUFFER_BINDING:
90 return 1;
91 case GL_FRONT_FACE:
92 return 1;
93 case GL_GENERATE_MIPMAP_HINT:
94 return 1;
95 case GL_GREEN_BITS:
96 return 1;
97 case GL_IMPLEMENTATION_COLOR_READ_FORMAT:
98 return 1;
99 case GL_IMPLEMENTATION_COLOR_READ_TYPE:
100 return 1;
101 case GL_LINE_WIDTH:
102 return 1;
103 case GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS:
104 return 1;
105 case GL_MAX_CUBE_MAP_TEXTURE_SIZE:
106 return 1;
107 case GL_MAX_FRAGMENT_UNIFORM_VECTORS:
108 return 1;
109 case GL_MAX_RENDERBUFFER_SIZE:
110 return 1;
111 case GL_MAX_TEXTURE_IMAGE_UNITS:
112 return 1;
113 case GL_MAX_TEXTURE_SIZE:
114 return 1;
115 case GL_MAX_VARYING_VECTORS:
116 return 1;
117 case GL_MAX_VERTEX_ATTRIBS:
118 return 1;
119 case GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS:
120 return 1;
121 case GL_MAX_VERTEX_UNIFORM_VECTORS:
122 return 1;
123 case GL_MAX_VIEWPORT_DIMS:
124 return 2;
125 case GL_NUM_COMPRESSED_TEXTURE_FORMATS:
126 return 1;
127 case GL_NUM_SHADER_BINARY_FORMATS:
128 return 1;
129 case GL_PACK_ALIGNMENT:
130 return 1;
131 case GL_PACK_REVERSE_ROW_ORDER_ANGLE:
132 return 1;
133 case GL_POLYGON_OFFSET_FACTOR:
134 return 1;
135 case GL_POLYGON_OFFSET_FILL:
136 return 1;
137 case GL_POLYGON_OFFSET_UNITS:
138 return 1;
139 case GL_RED_BITS:
140 return 1;
141 case GL_RENDERBUFFER_BINDING:
142 return 1;
143 case GL_SAMPLE_BUFFERS:
144 return 1;
145 case GL_SAMPLE_COVERAGE_INVERT:
146 return 1;
147 case GL_SAMPLE_COVERAGE_VALUE:
148 return 1;
149 case GL_SAMPLES:
150 return 1;
151 case GL_SCISSOR_BOX:
152 return 4;
153 case GL_SCISSOR_TEST:
154 return 1;
155 case GL_SHADER_BINARY_FORMATS:
156 return num_shader_binary_formats_;
157 case GL_SHADER_COMPILER:
158 return 1;
159 case GL_STENCIL_BACK_FAIL:
160 return 1;
161 case GL_STENCIL_BACK_FUNC:
162 return 1;
163 case GL_STENCIL_BACK_PASS_DEPTH_FAIL:
164 return 1;
165 case GL_STENCIL_BACK_PASS_DEPTH_PASS:
166 return 1;
167 case GL_STENCIL_BACK_REF:
168 return 1;
169 case GL_STENCIL_BACK_VALUE_MASK:
170 return 1;
171 case GL_STENCIL_BACK_WRITEMASK:
172 return 1;
173 case GL_STENCIL_BITS:
174 return 1;
175 case GL_STENCIL_CLEAR_VALUE:
176 return 1;
177 case GL_STENCIL_FAIL:
178 return 1;
179 case GL_STENCIL_FUNC:
180 return 1;
181 case GL_STENCIL_PASS_DEPTH_FAIL:
182 return 1;
183 case GL_STENCIL_PASS_DEPTH_PASS:
184 return 1;
185 case GL_STENCIL_REF:
186 return 1;
187 case GL_STENCIL_TEST:
188 return 1;
189 case GL_STENCIL_VALUE_MASK:
190 return 1;
191 case GL_STENCIL_WRITEMASK:
192 return 1;
193 case GL_SUBPIXEL_BITS:
194 return 1;
195 case GL_TEXTURE_BINDING_2D:
196 return 1;
197 case GL_TEXTURE_BINDING_CUBE_MAP:
198 return 1;
199 case GL_TEXTURE_BINDING_EXTERNAL_OES:
200 return 1;
201 case GL_TEXTURE_BINDING_RECTANGLE_ARB:
202 return 1;
203 case GL_TEXTURE_IMMUTABLE_FORMAT_EXT:
204 return 1;
205 case GL_UNPACK_ALIGNMENT:
206 return 1;
207 case GL_VIEWPORT:
208 return 4;
209 // -- glGetBooleanv, glGetFloatv, glGetIntergerv with
210 // GL_CHROMIUM_framebuffer_multisample
211 case GL_MAX_SAMPLES_EXT:
212 return 1;
213 case GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT:
214 return 1;
215
216 // -- glGetBufferParameteriv
217 case GL_BUFFER_SIZE:
218 return 1;
219 case GL_BUFFER_USAGE:
220 return 1;
221
222 // -- glGetFramebufferAttachmentParameteriv
223 case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE:
224 return 1;
225 case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME:
226 return 1;
227 case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL:
228 return 1;
229 case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE:
230 return 1;
231 // -- glGetFramebufferAttachmentParameteriv with
232 // GL_EXT_multisampled_render_to_texture
233 case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_SAMPLES_EXT:
234 return 1;
235
236 // -- glGetProgramiv
237 case GL_DELETE_STATUS:
238 return 1;
239 case GL_LINK_STATUS:
240 return 1;
241 case GL_VALIDATE_STATUS:
242 return 1;
243 case GL_INFO_LOG_LENGTH:
244 return 1;
245 case GL_ATTACHED_SHADERS:
246 return 1;
247 case GL_ACTIVE_ATTRIBUTES:
248 return 1;
249 case GL_ACTIVE_ATTRIBUTE_MAX_LENGTH:
250 return 1;
251 case GL_ACTIVE_UNIFORMS:
252 return 1;
253 case GL_ACTIVE_UNIFORM_MAX_LENGTH:
254 return 1;
255
256
257 // -- glGetRenderbufferAttachmentParameteriv
258 case GL_RENDERBUFFER_WIDTH:
259 return 1;
260 case GL_RENDERBUFFER_HEIGHT:
261 return 1;
262 case GL_RENDERBUFFER_INTERNAL_FORMAT:
263 return 1;
264 case GL_RENDERBUFFER_RED_SIZE:
265 return 1;
266 case GL_RENDERBUFFER_GREEN_SIZE:
267 return 1;
268 case GL_RENDERBUFFER_BLUE_SIZE:
269 return 1;
270 case GL_RENDERBUFFER_ALPHA_SIZE:
271 return 1;
272 case GL_RENDERBUFFER_DEPTH_SIZE:
273 return 1;
274 case GL_RENDERBUFFER_STENCIL_SIZE:
275 return 1;
276 // -- glGetRenderbufferAttachmentParameteriv with
277 // GL_EXT_multisampled_render_to_texture
278 case GL_RENDERBUFFER_SAMPLES_EXT:
279 return 1;
280
281 // -- glGetShaderiv
282 case GL_SHADER_TYPE:
283 return 1;
284 // Already defined under glGetFramebufferAttachemntParameteriv.
285 // case GL_DELETE_STATUS:
286 // return 1;
287 case GL_COMPILE_STATUS:
288 return 1;
289 // Already defined under glGetFramebufferAttachemntParameteriv.
290 // case GL_INFO_LOG_LENGTH:
291 // return 1;
292 case GL_SHADER_SOURCE_LENGTH:
293 return 1;
294 case GL_TRANSLATED_SHADER_SOURCE_LENGTH_ANGLE:
295 return 1;
296
297 // -- glGetTexParameterfv, glGetTexParameteriv
298 case GL_TEXTURE_MAG_FILTER:
299 return 1;
300 case GL_TEXTURE_MIN_FILTER:
301 return 1;
302 case GL_TEXTURE_WRAP_S:
303 return 1;
304 case GL_TEXTURE_WRAP_T:
305 return 1;
306 case GL_TEXTURE_MAX_ANISOTROPY_EXT:
307 return 1;
308
309 // -- glGetVertexAttribfv, glGetVertexAttribiv
310 case GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING:
311 return 1;
312 case GL_VERTEX_ATTRIB_ARRAY_ENABLED:
313 return 1;
314 case GL_VERTEX_ATTRIB_ARRAY_SIZE:
315 return 1;
316 case GL_VERTEX_ATTRIB_ARRAY_STRIDE:
317 return 1;
318 case GL_VERTEX_ATTRIB_ARRAY_TYPE:
319 return 1;
320 case GL_VERTEX_ATTRIB_ARRAY_NORMALIZED:
321 return 1;
322 case GL_CURRENT_VERTEX_ATTRIB:
323 return 4;
324
325 // -- glHint with GL_OES_standard_derivatives
326 case GL_FRAGMENT_SHADER_DERIVATIVE_HINT_OES:
327 return 1;
328
329 // Chromium internal bind_generates_resource query
330 case GL_BIND_GENERATES_RESOURCE_CHROMIUM:
331 return 1;
332
333 // bad enum
334 default:
335 return 0;
336 }
337 }
338
339 namespace {
340
341 // Return the number of elements per group of a specified format.
ElementsPerGroup(int format,int type)342 int ElementsPerGroup(int format, int type) {
343 switch (type) {
344 case GL_UNSIGNED_SHORT_5_6_5:
345 case GL_UNSIGNED_SHORT_4_4_4_4:
346 case GL_UNSIGNED_SHORT_5_5_5_1:
347 case GL_UNSIGNED_INT_24_8_OES:
348 return 1;
349 default:
350 break;
351 }
352
353 switch (format) {
354 case GL_RGB:
355 return 3;
356 case GL_LUMINANCE_ALPHA:
357 return 2;
358 case GL_RGBA:
359 case GL_BGRA_EXT:
360 return 4;
361 case GL_ALPHA:
362 case GL_LUMINANCE:
363 case GL_DEPTH_COMPONENT:
364 case GL_DEPTH_COMPONENT24_OES:
365 case GL_DEPTH_COMPONENT32_OES:
366 case GL_DEPTH_COMPONENT16:
367 case GL_DEPTH24_STENCIL8_OES:
368 case GL_DEPTH_STENCIL_OES:
369 return 1;
370 default:
371 return 0;
372 }
373 }
374
375 // Return the number of bytes per element, based on the element type.
BytesPerElement(int type)376 int BytesPerElement(int type) {
377 switch (type) {
378 case GL_FLOAT:
379 case GL_UNSIGNED_INT_24_8_OES:
380 case GL_UNSIGNED_INT:
381 return 4;
382 case GL_HALF_FLOAT_OES:
383 case GL_UNSIGNED_SHORT:
384 case GL_SHORT:
385 case GL_UNSIGNED_SHORT_5_6_5:
386 case GL_UNSIGNED_SHORT_4_4_4_4:
387 case GL_UNSIGNED_SHORT_5_5_5_1:
388 return 2;
389 case GL_UNSIGNED_BYTE:
390 case GL_BYTE:
391 return 1;
392 default:
393 return 0;
394 }
395 }
396
397 } // anonymous namespace
398
ComputeImageGroupSize(int format,int type)399 uint32 GLES2Util::ComputeImageGroupSize(int format, int type) {
400 return BytesPerElement(type) * ElementsPerGroup(format, type);
401 }
402
ComputeImagePaddedRowSize(int width,int format,int type,int unpack_alignment,uint32 * padded_row_size)403 bool GLES2Util::ComputeImagePaddedRowSize(
404 int width, int format, int type, int unpack_alignment,
405 uint32* padded_row_size) {
406 uint32 bytes_per_group = ComputeImageGroupSize(format, type);
407 uint32 unpadded_row_size;
408 if (!SafeMultiplyUint32(width, bytes_per_group, &unpadded_row_size)) {
409 return false;
410 }
411 uint32 temp;
412 if (!SafeAddUint32(unpadded_row_size, unpack_alignment - 1, &temp)) {
413 return false;
414 }
415 *padded_row_size = (temp / unpack_alignment) * unpack_alignment;
416 return true;
417 }
418
419 // Returns the amount of data glTexImage2D or glTexSubImage2D will access.
ComputeImageDataSizes(int width,int height,int format,int type,int unpack_alignment,uint32 * size,uint32 * ret_unpadded_row_size,uint32 * ret_padded_row_size)420 bool GLES2Util::ComputeImageDataSizes(
421 int width, int height, int format, int type, int unpack_alignment,
422 uint32* size, uint32* ret_unpadded_row_size, uint32* ret_padded_row_size) {
423 uint32 bytes_per_group = ComputeImageGroupSize(format, type);
424 uint32 row_size;
425 if (!SafeMultiplyUint32(width, bytes_per_group, &row_size)) {
426 return false;
427 }
428 if (height > 1) {
429 uint32 temp;
430 if (!SafeAddUint32(row_size, unpack_alignment - 1, &temp)) {
431 return false;
432 }
433 uint32 padded_row_size = (temp / unpack_alignment) * unpack_alignment;
434 uint32 size_of_all_but_last_row;
435 if (!SafeMultiplyUint32((height - 1), padded_row_size,
436 &size_of_all_but_last_row)) {
437 return false;
438 }
439 if (!SafeAddUint32(size_of_all_but_last_row, row_size, size)) {
440 return false;
441 }
442 if (ret_padded_row_size) {
443 *ret_padded_row_size = padded_row_size;
444 }
445 } else {
446 if (!SafeMultiplyUint32(height, row_size, size)) {
447 return false;
448 }
449 if (ret_padded_row_size) {
450 *ret_padded_row_size = row_size;
451 }
452 }
453 if (ret_unpadded_row_size) {
454 *ret_unpadded_row_size = row_size;
455 }
456
457 return true;
458 }
459
RenderbufferBytesPerPixel(int format)460 size_t GLES2Util::RenderbufferBytesPerPixel(int format) {
461 switch (format) {
462 case GL_STENCIL_INDEX8:
463 return 1;
464 case GL_RGBA4:
465 case GL_RGB565:
466 case GL_RGB5_A1:
467 case GL_DEPTH_COMPONENT16:
468 return 2;
469 case GL_RGB:
470 case GL_RGBA:
471 case GL_DEPTH24_STENCIL8_OES:
472 case GL_RGB8_OES:
473 case GL_RGBA8_OES:
474 case GL_DEPTH_COMPONENT24_OES:
475 return 4;
476 default:
477 return 0;
478 }
479 }
480
GetGLDataTypeSizeForUniforms(int type)481 uint32 GLES2Util::GetGLDataTypeSizeForUniforms(int type) {
482 switch (type) {
483 case GL_FLOAT:
484 return sizeof(GLfloat); // NOLINT
485 case GL_FLOAT_VEC2:
486 return sizeof(GLfloat) * 2; // NOLINT
487 case GL_FLOAT_VEC3:
488 return sizeof(GLfloat) * 3; // NOLINT
489 case GL_FLOAT_VEC4:
490 return sizeof(GLfloat) * 4; // NOLINT
491 case GL_INT:
492 return sizeof(GLint); // NOLINT
493 case GL_INT_VEC2:
494 return sizeof(GLint) * 2; // NOLINT
495 case GL_INT_VEC3:
496 return sizeof(GLint) * 3; // NOLINT
497 case GL_INT_VEC4:
498 return sizeof(GLint) * 4; // NOLINT
499 case GL_BOOL:
500 return sizeof(GLint); // NOLINT
501 case GL_BOOL_VEC2:
502 return sizeof(GLint) * 2; // NOLINT
503 case GL_BOOL_VEC3:
504 return sizeof(GLint) * 3; // NOLINT
505 case GL_BOOL_VEC4:
506 return sizeof(GLint) * 4; // NOLINT
507 case GL_FLOAT_MAT2:
508 return sizeof(GLfloat) * 2 * 2; // NOLINT
509 case GL_FLOAT_MAT3:
510 return sizeof(GLfloat) * 3 * 3; // NOLINT
511 case GL_FLOAT_MAT4:
512 return sizeof(GLfloat) * 4 * 4; // NOLINT
513 case GL_SAMPLER_2D:
514 return sizeof(GLint); // NOLINT
515 case GL_SAMPLER_2D_RECT_ARB:
516 return sizeof(GLint); // NOLINT
517 case GL_SAMPLER_CUBE:
518 return sizeof(GLint); // NOLINT
519 case GL_SAMPLER_EXTERNAL_OES:
520 return sizeof(GLint); // NOLINT
521 default:
522 return 0;
523 }
524 }
525
GetGLTypeSizeForTexturesAndBuffers(uint32 type)526 size_t GLES2Util::GetGLTypeSizeForTexturesAndBuffers(uint32 type) {
527 switch (type) {
528 case GL_BYTE:
529 return sizeof(GLbyte); // NOLINT
530 case GL_UNSIGNED_BYTE:
531 return sizeof(GLubyte); // NOLINT
532 case GL_SHORT:
533 return sizeof(GLshort); // NOLINT
534 case GL_UNSIGNED_SHORT:
535 return sizeof(GLushort); // NOLINT
536 case GL_INT:
537 return sizeof(GLint); // NOLINT
538 case GL_UNSIGNED_INT:
539 return sizeof(GLuint); // NOLINT
540 case GL_FLOAT:
541 return sizeof(GLfloat); // NOLINT
542 case GL_FIXED:
543 return sizeof(GLfixed); // NOLINT
544 default:
545 return 0;
546 }
547 }
548
GLErrorToErrorBit(uint32 error)549 uint32 GLES2Util::GLErrorToErrorBit(uint32 error) {
550 switch (error) {
551 case GL_INVALID_ENUM:
552 return gl_error_bit::kInvalidEnum;
553 case GL_INVALID_VALUE:
554 return gl_error_bit::kInvalidValue;
555 case GL_INVALID_OPERATION:
556 return gl_error_bit::kInvalidOperation;
557 case GL_OUT_OF_MEMORY:
558 return gl_error_bit::kOutOfMemory;
559 case GL_INVALID_FRAMEBUFFER_OPERATION:
560 return gl_error_bit::kInvalidFrameBufferOperation;
561 default:
562 NOTREACHED();
563 return gl_error_bit::kNoError;
564 }
565 }
566
GLErrorBitToGLError(uint32 error_bit)567 uint32 GLES2Util::GLErrorBitToGLError(uint32 error_bit) {
568 switch (error_bit) {
569 case gl_error_bit::kInvalidEnum:
570 return GL_INVALID_ENUM;
571 case gl_error_bit::kInvalidValue:
572 return GL_INVALID_VALUE;
573 case gl_error_bit::kInvalidOperation:
574 return GL_INVALID_OPERATION;
575 case gl_error_bit::kOutOfMemory:
576 return GL_OUT_OF_MEMORY;
577 case gl_error_bit::kInvalidFrameBufferOperation:
578 return GL_INVALID_FRAMEBUFFER_OPERATION;
579 default:
580 NOTREACHED();
581 return GL_NO_ERROR;
582 }
583 }
584
IndexToGLFaceTarget(int index)585 uint32 GLES2Util::IndexToGLFaceTarget(int index) {
586 static uint32 faces[] = {
587 GL_TEXTURE_CUBE_MAP_POSITIVE_X,
588 GL_TEXTURE_CUBE_MAP_NEGATIVE_X,
589 GL_TEXTURE_CUBE_MAP_POSITIVE_Y,
590 GL_TEXTURE_CUBE_MAP_NEGATIVE_Y,
591 GL_TEXTURE_CUBE_MAP_POSITIVE_Z,
592 GL_TEXTURE_CUBE_MAP_NEGATIVE_Z,
593 };
594 return faces[index];
595 }
596
GetPreferredGLReadPixelsFormat(uint32 internal_format)597 uint32 GLES2Util::GetPreferredGLReadPixelsFormat(uint32 internal_format) {
598 switch (internal_format) {
599 case GL_RGB16F_EXT:
600 case GL_RGB32F_EXT:
601 return GL_RGB;
602 case GL_RGBA16F_EXT:
603 case GL_RGBA32F_EXT:
604 return GL_RGBA;
605 default:
606 return GL_RGBA;
607 }
608 }
609
GetPreferredGLReadPixelsType(uint32 internal_format,uint32 texture_type)610 uint32 GLES2Util::GetPreferredGLReadPixelsType(
611 uint32 internal_format, uint32 texture_type) {
612 switch (internal_format) {
613 case GL_RGBA32F_EXT:
614 case GL_RGB32F_EXT:
615 return GL_FLOAT;
616 case GL_RGBA16F_EXT:
617 case GL_RGB16F_EXT:
618 return GL_HALF_FLOAT_OES;
619 case GL_RGBA:
620 case GL_RGB:
621 // Unsized internal format, check the type
622 switch (texture_type) {
623 case GL_FLOAT:
624 case GL_HALF_FLOAT_OES:
625 return GL_FLOAT;
626 default:
627 return GL_UNSIGNED_BYTE;
628 }
629 default:
630 return GL_UNSIGNED_BYTE;
631 }
632 }
633
GetChannelsForFormat(int format)634 uint32 GLES2Util::GetChannelsForFormat(int format) {
635 switch (format) {
636 case GL_ALPHA:
637 case GL_ALPHA16F_EXT:
638 case GL_ALPHA32F_EXT:
639 return kAlpha;
640 case GL_LUMINANCE:
641 return kRGB;
642 case GL_LUMINANCE_ALPHA:
643 return kRGBA;
644 case GL_RGB:
645 case GL_RGB8_OES:
646 case GL_RGB565:
647 case GL_RGB16F_EXT:
648 case GL_RGB32F_EXT:
649 return kRGB;
650 case GL_BGRA_EXT:
651 case GL_BGRA8_EXT:
652 case GL_RGBA16F_EXT:
653 case GL_RGBA32F_EXT:
654 case GL_RGBA:
655 case GL_RGBA8_OES:
656 case GL_RGBA4:
657 case GL_RGB5_A1:
658 return kRGBA;
659 case GL_DEPTH_COMPONENT32_OES:
660 case GL_DEPTH_COMPONENT24_OES:
661 case GL_DEPTH_COMPONENT16:
662 case GL_DEPTH_COMPONENT:
663 return kDepth;
664 case GL_STENCIL_INDEX8:
665 return kStencil;
666 case GL_DEPTH_STENCIL_OES:
667 case GL_DEPTH24_STENCIL8_OES:
668 return kDepth | kStencil;
669 default:
670 return 0x0000;
671 }
672 }
673
GetChannelsNeededForAttachmentType(int type,uint32 max_color_attachments)674 uint32 GLES2Util::GetChannelsNeededForAttachmentType(
675 int type, uint32 max_color_attachments) {
676 switch (type) {
677 case GL_DEPTH_ATTACHMENT:
678 return kDepth;
679 case GL_STENCIL_ATTACHMENT:
680 return kStencil;
681 default:
682 if (type >= GL_COLOR_ATTACHMENT0 &&
683 type < static_cast<int>(
684 GL_COLOR_ATTACHMENT0 + max_color_attachments)) {
685 return kRGBA;
686 }
687 return 0x0000;
688 }
689 }
690
GetStringEnum(uint32 value)691 std::string GLES2Util::GetStringEnum(uint32 value) {
692 const EnumToString* entry = enum_to_string_table_;
693 const EnumToString* end = entry + enum_to_string_table_len_;
694 for (;entry < end; ++entry) {
695 if (value == entry->value) {
696 return entry->name;
697 }
698 }
699 std::stringstream ss;
700 ss.fill('0');
701 ss.width(value < 0x10000 ? 4 : 8);
702 ss << std::hex << value;
703 return "0x" + ss.str();
704 }
705
GetStringError(uint32 value)706 std::string GLES2Util::GetStringError(uint32 value) {
707 static EnumToString string_table[] = {
708 { GL_NONE, "GL_NONE" },
709 };
710 return GLES2Util::GetQualifiedEnumString(
711 string_table, arraysize(string_table), value);
712 }
713
GetStringBool(uint32 value)714 std::string GLES2Util::GetStringBool(uint32 value) {
715 return value ? "GL_TRUE" : "GL_FALSE";
716 }
717
GetQualifiedEnumString(const EnumToString * table,size_t count,uint32 value)718 std::string GLES2Util::GetQualifiedEnumString(
719 const EnumToString* table, size_t count, uint32 value) {
720 for (const EnumToString* end = table + count; table < end; ++table) {
721 if (table->value == value) {
722 return table->name;
723 }
724 }
725 return GetStringEnum(value);
726 }
727
ParseUniformName(const std::string & name,size_t * array_pos,int * element_index,bool * getting_array)728 bool GLES2Util::ParseUniformName(
729 const std::string& name,
730 size_t* array_pos,
731 int* element_index,
732 bool* getting_array) {
733 bool getting_array_location = false;
734 size_t open_pos = std::string::npos;
735 int index = 0;
736 if (name[name.size() - 1] == ']') {
737 if (name.size() < 3) {
738 return false;
739 }
740 open_pos = name.find_last_of('[');
741 if (open_pos == std::string::npos ||
742 open_pos >= name.size() - 2) {
743 return false;
744 }
745 size_t last = name.size() - 1;
746 for (size_t pos = open_pos + 1; pos < last; ++pos) {
747 int8 digit = name[pos] - '0';
748 if (digit < 0 || digit > 9) {
749 return false;
750 }
751 index = index * 10 + digit;
752 }
753 getting_array_location = true;
754 }
755 *getting_array = getting_array_location;
756 *element_index = index;
757 *array_pos = open_pos;
758 return true;
759 }
760
761 namespace {
762
763 // From <EGL/egl.h>.
764 const int32 kAlphaSize = 0x3021; // EGL_ALPHA_SIZE
765 const int32 kBlueSize = 0x3022; // EGL_BLUE_SIZE
766 const int32 kGreenSize = 0x3023; // EGL_GREEN_SIZE
767 const int32 kRedSize = 0x3024; // EGL_RED_SIZE
768 const int32 kDepthSize = 0x3025; // EGL_DEPTH_SIZE
769 const int32 kStencilSize = 0x3026; // EGL_STENCIL_SIZE
770 const int32 kSamples = 0x3031; // EGL_SAMPLES
771 const int32 kSampleBuffers = 0x3032; // EGL_SAMPLE_BUFFERS
772 const int32 kNone = 0x3038; // EGL_NONE
773 const int32 kSwapBehavior = 0x3093; // EGL_SWAP_BEHAVIOR
774 const int32 kBufferPreserved = 0x3094; // EGL_BUFFER_PRESERVED
775 const int32 kBufferDestroyed = 0x3095; // EGL_BUFFER_DESTROYED
776
777 // Chromium only.
778 const int32 kShareResources = 0x10000;
779 const int32 kBindGeneratesResource = 0x10001;
780 const int32 kFailIfMajorPerfCaveat = 0x10002;
781 const int32 kLoseContextWhenOutOfMemory = 0x10003;
782
783 } // namespace
784
ContextCreationAttribHelper()785 ContextCreationAttribHelper::ContextCreationAttribHelper()
786 : alpha_size_(-1),
787 blue_size_(-1),
788 green_size_(-1),
789 red_size_(-1),
790 depth_size_(-1),
791 stencil_size_(-1),
792 samples_(-1),
793 sample_buffers_(-1),
794 buffer_preserved_(true),
795 share_resources_(false),
796 bind_generates_resource_(true),
797 fail_if_major_perf_caveat_(false),
798 lose_context_when_out_of_memory_(false) {}
799
Serialize(std::vector<int32> * attribs)800 void ContextCreationAttribHelper::Serialize(std::vector<int32>* attribs) {
801 if (alpha_size_ != -1) {
802 attribs->push_back(kAlphaSize);
803 attribs->push_back(alpha_size_);
804 }
805 if (blue_size_ != -1) {
806 attribs->push_back(kBlueSize);
807 attribs->push_back(blue_size_);
808 }
809 if (green_size_ != -1) {
810 attribs->push_back(kGreenSize);
811 attribs->push_back(green_size_);
812 }
813 if (red_size_ != -1) {
814 attribs->push_back(kRedSize);
815 attribs->push_back(red_size_);
816 }
817 if (depth_size_ != -1) {
818 attribs->push_back(kDepthSize);
819 attribs->push_back(depth_size_);
820 }
821 if (stencil_size_ != -1) {
822 attribs->push_back(kStencilSize);
823 attribs->push_back(stencil_size_);
824 }
825 if (samples_ != -1) {
826 attribs->push_back(kSamples);
827 attribs->push_back(samples_);
828 }
829 if (sample_buffers_ != -1) {
830 attribs->push_back(kSampleBuffers);
831 attribs->push_back(sample_buffers_);
832 }
833 attribs->push_back(kSwapBehavior);
834 attribs->push_back(buffer_preserved_ ? kBufferPreserved : kBufferDestroyed);
835 attribs->push_back(kShareResources);
836 attribs->push_back(share_resources_ ? 1 : 0);
837 attribs->push_back(kBindGeneratesResource);
838 attribs->push_back(bind_generates_resource_ ? 1 : 0);
839 attribs->push_back(kFailIfMajorPerfCaveat);
840 attribs->push_back(fail_if_major_perf_caveat_ ? 1 : 0);
841 attribs->push_back(kLoseContextWhenOutOfMemory);
842 attribs->push_back(lose_context_when_out_of_memory_ ? 1 : 0);
843 attribs->push_back(kNone);
844 }
845
Parse(const std::vector<int32> & attribs)846 bool ContextCreationAttribHelper::Parse(const std::vector<int32>& attribs) {
847 for (size_t i = 0; i < attribs.size(); i += 2) {
848 const int32 attrib = attribs[i];
849 if (i + 1 >= attribs.size()) {
850 if (attrib == kNone) {
851 return true;
852 }
853
854 DLOG(ERROR) << "Missing value after context creation attribute: "
855 << attrib;
856 return false;
857 }
858
859 const int32 value = attribs[i+1];
860 switch (attrib) {
861 case kAlphaSize:
862 alpha_size_ = value;
863 break;
864 case kBlueSize:
865 blue_size_ = value;
866 break;
867 case kGreenSize:
868 green_size_ = value;
869 break;
870 case kRedSize:
871 red_size_ = value;
872 break;
873 case kDepthSize:
874 depth_size_ = value;
875 break;
876 case kStencilSize:
877 stencil_size_ = value;
878 break;
879 case kSamples:
880 samples_ = value;
881 break;
882 case kSampleBuffers:
883 sample_buffers_ = value;
884 break;
885 case kSwapBehavior:
886 buffer_preserved_ = value == kBufferPreserved;
887 break;
888 case kShareResources:
889 share_resources_ = value != 0;
890 break;
891 case kBindGeneratesResource:
892 bind_generates_resource_ = value != 0;
893 break;
894 case kFailIfMajorPerfCaveat:
895 fail_if_major_perf_caveat_ = value != 0;
896 break;
897 case kLoseContextWhenOutOfMemory:
898 lose_context_when_out_of_memory_ = value != 0;
899 break;
900 case kNone:
901 // Terminate list, even if more attributes.
902 return true;
903 default:
904 DLOG(ERROR) << "Invalid context creation attribute: " << attrib;
905 return false;
906 }
907 }
908
909 return true;
910 }
911
912 #include "gpu/command_buffer/common/gles2_cmd_utils_implementation_autogen.h"
913
914 } // namespace gles2
915 } // namespace gpu
916
917