OLD | NEW |
---|---|
1 /* | 1 /* |
2 * Copyright (c) 2010, Google Inc. All rights reserved. | 2 * Copyright (c) 2010, Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
6 * met: | 6 * met: |
7 * | 7 * |
8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
(...skipping 87 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... | |
98 extensionsUtil->ensureExtensionEnabled("GL_EXT_multisampled_render_t o_texture"); | 98 extensionsUtil->ensureExtensionEnabled("GL_EXT_multisampled_render_t o_texture"); |
99 } | 99 } |
100 bool packedDepthStencilSupported = extensionsUtil->supportsExtension("GL_OES _packed_depth_stencil"); | 100 bool packedDepthStencilSupported = extensionsUtil->supportsExtension("GL_OES _packed_depth_stencil"); |
101 if (packedDepthStencilSupported) | 101 if (packedDepthStencilSupported) |
102 extensionsUtil->ensureExtensionEnabled("GL_OES_packed_depth_stencil"); | 102 extensionsUtil->ensureExtensionEnabled("GL_OES_packed_depth_stencil"); |
103 bool discardFramebufferSupported = extensionsUtil->supportsExtension("GL_EXT _discard_framebuffer"); | 103 bool discardFramebufferSupported = extensionsUtil->supportsExtension("GL_EXT _discard_framebuffer"); |
104 if (discardFramebufferSupported) | 104 if (discardFramebufferSupported) |
105 extensionsUtil->ensureExtensionEnabled("GL_EXT_discard_framebuffer"); | 105 extensionsUtil->ensureExtensionEnabled("GL_EXT_discard_framebuffer"); |
106 | 106 |
107 RefPtr<DrawingBuffer> drawingBuffer = adoptRef(new DrawingBuffer(context, ex tensionsUtil.release(), multisampleSupported, packedDepthStencilSupported, disca rdFramebufferSupported, preserve, requestedAttributes)); | 107 RefPtr<DrawingBuffer> drawingBuffer = adoptRef(new DrawingBuffer(context, ex tensionsUtil.release(), multisampleSupported, packedDepthStencilSupported, disca rdFramebufferSupported, preserve, requestedAttributes)); |
108 drawingBuffer->validateBackbuffer(); | |
108 if (!drawingBuffer->initialize(size)) { | 109 if (!drawingBuffer->initialize(size)) { |
109 drawingBuffer->beginDestruction(); | 110 drawingBuffer->beginDestruction(); |
110 return PassRefPtr<DrawingBuffer>(); | 111 return PassRefPtr<DrawingBuffer>(); |
111 } | 112 } |
112 return drawingBuffer.release(); | 113 return drawingBuffer.release(); |
113 } | 114 } |
114 | 115 |
115 DrawingBuffer::DrawingBuffer(PassOwnPtr<WebGraphicsContext3D> context, | 116 DrawingBuffer::DrawingBuffer(PassOwnPtr<WebGraphicsContext3D> context, |
116 PassOwnPtr<Extensions3DUtil> extensionsUtil, | 117 PassOwnPtr<Extensions3DUtil> extensionsUtil, |
117 bool multisampleExtensionSupported, | 118 bool multisampleExtensionSupported, |
(...skipping 278 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... | |
396 ASSERT_NOT_REACHED(); | 397 ASSERT_NOT_REACHED(); |
397 } | 398 } |
398 | 399 |
399 bool DrawingBuffer::initialize(const IntSize& size) | 400 bool DrawingBuffer::initialize(const IntSize& size) |
400 { | 401 { |
401 if (m_context->isContextLost()) { | 402 if (m_context->isContextLost()) { |
402 // Need to try to restore the context again later. | 403 // Need to try to restore the context again later. |
403 return false; | 404 return false; |
404 } | 405 } |
405 | 406 |
406 if (m_requestedAttributes.alpha) { | 407 // Type of color format should be selected based on |
408 // alpha attribute & texture format supported on GPU's | |
409 if (m_requestedAttributes.alpha || !isRGBTextureSupported()) { | |
407 m_internalColorFormat = GL_RGBA; | 410 m_internalColorFormat = GL_RGBA; |
408 m_colorFormat = GL_RGBA; | 411 m_colorFormat = GL_RGBA; |
409 m_internalRenderbufferFormat = GL_RGBA8_OES; | 412 m_internalRenderbufferFormat = GL_RGBA8_OES; |
410 } else { | 413 } else { |
411 m_internalColorFormat = GL_RGB; | 414 m_internalColorFormat = GL_RGB; |
412 m_colorFormat = GL_RGB; | 415 m_colorFormat = GL_RGB; |
413 m_internalRenderbufferFormat = GL_RGB8_OES; | 416 m_internalRenderbufferFormat = GL_RGB8_OES; |
414 } | 417 } |
415 | 418 |
416 m_context->getIntegerv(GL_MAX_TEXTURE_SIZE, &m_maxTextureSize); | 419 m_context->getIntegerv(GL_MAX_TEXTURE_SIZE, &m_maxTextureSize); |
(...skipping 339 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... | |
756 break; | 759 break; |
757 } while (!adjustedSize.isEmpty()); | 760 } while (!adjustedSize.isEmpty()); |
758 | 761 |
759 setSize(adjustedSize); | 762 setSize(adjustedSize); |
760 | 763 |
761 if (adjustedSize.isEmpty()) | 764 if (adjustedSize.isEmpty()) |
762 return false; | 765 return false; |
763 } | 766 } |
764 | 767 |
765 m_context->disable(GL_SCISSOR_TEST); | 768 m_context->disable(GL_SCISSOR_TEST); |
766 m_context->clearColor(0, 0, 0, 0); | 769 |
767 m_context->colorMask(true, true, true, true); | 770 if (!m_requestedAttributes.alpha && !isRGBTextureSupported()) { |
771 // This case signifies that requested alpha attribute is false, even tho ugh | |
772 // DrawingBuffer choosen backbuffer as GL_RGBA format (due to GPU limita tions). | |
773 // 1. So ensure alpha channel should be cleared to 1.0 | |
774 // 2. colormask should be disabled (Turn off rendering to alpha) | |
775 m_context->clearColor(0, 0, 0, 1); | |
776 m_context->colorMask(true, true, true, false); | |
Ken Russell (switch to Gerrit)
2015/04/06 21:43:18
This won't work -- the color mask applies to clear
| |
777 } else { | |
778 m_context->clearColor(0, 0, 0, 0); | |
779 m_context->colorMask(true, true, true, true); | |
780 } | |
768 | 781 |
769 GLbitfield clearMask = GL_COLOR_BUFFER_BIT; | 782 GLbitfield clearMask = GL_COLOR_BUFFER_BIT; |
770 if (m_actualAttributes.depth) { | 783 if (m_actualAttributes.depth) { |
771 m_context->clearDepth(1.0f); | 784 m_context->clearDepth(1.0f); |
772 clearMask |= GL_DEPTH_BUFFER_BIT; | 785 clearMask |= GL_DEPTH_BUFFER_BIT; |
773 m_context->depthMask(true); | 786 m_context->depthMask(true); |
774 } | 787 } |
775 if (m_actualAttributes.stencil) { | 788 if (m_actualAttributes.stencil) { |
776 m_context->clearStencil(0); | 789 m_context->clearStencil(0); |
777 clearMask |= GL_STENCIL_BUFFER_BIT; | 790 clearMask |= GL_STENCIL_BUFFER_BIT; |
(...skipping 202 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... | |
980 | 993 |
981 void DrawingBuffer::deleteChromiumImageForTexture(TextureInfo* info) | 994 void DrawingBuffer::deleteChromiumImageForTexture(TextureInfo* info) |
982 { | 995 { |
983 if (info->imageId) { | 996 if (info->imageId) { |
984 m_context->releaseTexImage2DCHROMIUM(GL_TEXTURE_2D, info->imageId); | 997 m_context->releaseTexImage2DCHROMIUM(GL_TEXTURE_2D, info->imageId); |
985 m_context->destroyImageCHROMIUM(info->imageId); | 998 m_context->destroyImageCHROMIUM(info->imageId); |
986 info->imageId = 0; | 999 info->imageId = 0; |
987 } | 1000 } |
988 } | 1001 } |
989 | 1002 |
1003 void DrawingBuffer::validateBackbuffer() | |
1004 { | |
1005 // One time validation is required for GL_RGB texture | |
Ken Russell (switch to Gerrit)
2015/04/06 21:43:18
I'm sorry, but I'm not comfortable doing this code
Ken Russell (switch to Gerrit)
2015/04/06 21:44:54
Also -- on request from another engineer on Blink,
| |
1006 // so that DrawingBuffer can choose format for the backbuffer correctly. | |
1007 // DrawingBuffer tries to allocate GL_RGB texture in case of alpha attribute false | |
1008 // and fails because GL_RGB not supported on specific GPU's (e.g Mali- 2/3/4 00 family). | |
1009 Platform3DObject fbo = m_context->createFramebuffer(); | |
1010 m_context->bindFramebuffer(GL_FRAMEBUFFER, fbo); | |
1011 unsigned offscreenRGBTexture = createColorTexture(); | |
1012 m_context->texImage2D(GL_TEXTURE_2D, 0, GL_RGB, 1, 1, 0, GL_RGB, GL_UNSIGNED _BYTE, 0); | |
1013 m_context->framebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEX TURE_2D, offscreenRGBTexture, 0); | |
1014 m_RGBTextureSupported = m_context->checkFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE; | |
1015 | |
1016 if (fbo) | |
Ken Russell (switch to Gerrit)
2015/04/06 21:43:18
Also m_context_>bindFramebuffer(GL_FRAMEBUFFER, 0)
| |
1017 m_context->deleteFramebuffer(fbo); | |
1018 | |
1019 if (offscreenRGBTexture) | |
1020 m_context->deleteTexture(offscreenRGBTexture); | |
1021 } | |
1022 | |
990 } // namespace blink | 1023 } // namespace blink |
OLD | NEW |