The Tor Browser / file comparison
comparison: gfx/skia/trunk/src/gpu/gl/SkGLContextHelper.cpp
gfx/skia/trunk/src/gpu/gl/SkGLContextHelper.cpp
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:b0dc656bb852 |
|---|---|
| 1 | |
| 2 /* | |
| 3 * Copyright 2013 Google Inc. | |
| 4 * | |
| 5 * Use of this source code is governed by a BSD-style license that can be | |
| 6 * found in the LICENSE file. | |
| 7 */ | |
| 8 #include "gl/SkGLContextHelper.h" | |
| 9 #include "GrGLUtil.h" | |
| 10 | |
| 11 SkGLContextHelper::SkGLContextHelper() | |
| 12 : fFBO(0) | |
| 13 , fColorBufferID(0) | |
| 14 , fDepthStencilBufferID(0) | |
| 15 , fGL(NULL) { | |
| 16 } | |
| 17 | |
| 18 SkGLContextHelper::~SkGLContextHelper() { | |
| 19 | |
| 20 if (fGL) { | |
| 21 // TODO: determine why DeleteFramebuffers is generating a GL error in tests | |
| 22 SK_GL_NOERRCHECK(*this, DeleteFramebuffers(1, &fFBO)); | |
| 23 SK_GL_NOERRCHECK(*this, DeleteRenderbuffers(1, &fColorBufferID)); | |
| 24 SK_GL_NOERRCHECK(*this, DeleteRenderbuffers(1, &fDepthStencilBufferID)); | |
| 25 } | |
| 26 | |
| 27 SkSafeUnref(fGL); | |
| 28 } | |
| 29 | |
| 30 bool SkGLContextHelper::init(int width, int height) { | |
| 31 if (fGL) { | |
| 32 fGL->unref(); | |
| 33 this->destroyGLContext(); | |
| 34 } | |
| 35 | |
| 36 fGL = this->createGLContext(); | |
| 37 if (fGL) { | |
| 38 const GrGLubyte* temp; | |
| 39 | |
| 40 if (!fGL->validate()) { | |
| 41 fGL = NULL; | |
| 42 this->destroyGLContext(); | |
| 43 return false; | |
| 44 } | |
| 45 | |
| 46 SK_GL_RET(*this, temp, GetString(GR_GL_VERSION)); | |
| 47 const char* versionStr = reinterpret_cast<const char*>(temp); | |
| 48 GrGLVersion version = GrGLGetVersionFromString(versionStr); | |
| 49 | |
| 50 // clear any existing GL erorrs | |
| 51 GrGLenum error; | |
| 52 do { | |
| 53 SK_GL_RET(*this, error, GetError()); | |
| 54 } while (GR_GL_NO_ERROR != error); | |
| 55 | |
| 56 SK_GL(*this, GenFramebuffers(1, &fFBO)); | |
| 57 SK_GL(*this, BindFramebuffer(GR_GL_FRAMEBUFFER, fFBO)); | |
| 58 SK_GL(*this, GenRenderbuffers(1, &fColorBufferID)); | |
| 59 SK_GL(*this, BindRenderbuffer(GR_GL_RENDERBUFFER, fColorBufferID)); | |
| 60 if (kGLES_GrGLStandard == this->gl()->fStandard) { | |
| 61 SK_GL(*this, RenderbufferStorage(GR_GL_RENDERBUFFER, | |
| 62 GR_GL_RGBA8, | |
| 63 width, height)); | |
| 64 } else { | |
| 65 SK_GL(*this, RenderbufferStorage(GR_GL_RENDERBUFFER, | |
| 66 GR_GL_RGBA, | |
| 67 width, height)); | |
| 68 } | |
| 69 SK_GL(*this, FramebufferRenderbuffer(GR_GL_FRAMEBUFFER, | |
| 70 GR_GL_COLOR_ATTACHMENT0, | |
| 71 GR_GL_RENDERBUFFER, | |
| 72 fColorBufferID)); | |
| 73 SK_GL(*this, GenRenderbuffers(1, &fDepthStencilBufferID)); | |
| 74 SK_GL(*this, BindRenderbuffer(GR_GL_RENDERBUFFER, fDepthStencilBufferID)); | |
| 75 | |
| 76 // Some drivers that support packed depth stencil will only succeed | |
| 77 // in binding a packed format an FBO. However, we can't rely on packed | |
| 78 // depth stencil being available. | |
| 79 bool supportsPackedDepthStencil; | |
| 80 if (kGLES_GrGLStandard == this->gl()->fStandard) { | |
| 81 supportsPackedDepthStencil = version >= GR_GL_VER(3,0) || | |
| 82 this->hasExtension("GL_OES_packed_depth_stencil"); | |
| 83 } else { | |
| 84 supportsPackedDepthStencil = version >= GR_GL_VER(3,0) || | |
| 85 this->hasExtension("GL_EXT_packed_depth_stencil") || | |
| 86 this->hasExtension("GL_ARB_framebuffer_object"); | |
| 87 } | |
| 88 | |
| 89 if (supportsPackedDepthStencil) { | |
| 90 // ES2 requires sized internal formats for RenderbufferStorage | |
| 91 // On Desktop we let the driver decide. | |
| 92 GrGLenum format = kGLES_GrGLStandard == this->gl()->fStandard ? | |
| 93 GR_GL_DEPTH24_STENCIL8 : | |
| 94 GR_GL_DEPTH_STENCIL; | |
| 95 SK_GL(*this, RenderbufferStorage(GR_GL_RENDERBUFFER, | |
| 96 format, | |
| 97 width, height)); | |
| 98 SK_GL(*this, FramebufferRenderbuffer(GR_GL_FRAMEBUFFER, | |
| 99 GR_GL_DEPTH_ATTACHMENT, | |
| 100 GR_GL_RENDERBUFFER, | |
| 101 fDepthStencilBufferID)); | |
| 102 } else { | |
| 103 GrGLenum format = kGLES_GrGLStandard == this->gl()->fStandard ? GR_GL_STENCIL_INDEX8 : | |
| 104 GR_GL_STENCIL_INDEX; | |
| 105 SK_GL(*this, RenderbufferStorage(GR_GL_RENDERBUFFER, | |
| 106 format, | |
| 107 width, height)); | |
| 108 } | |
| 109 SK_GL(*this, FramebufferRenderbuffer(GR_GL_FRAMEBUFFER, | |
| 110 GR_GL_STENCIL_ATTACHMENT, | |
| 111 GR_GL_RENDERBUFFER, | |
| 112 fDepthStencilBufferID)); | |
| 113 SK_GL(*this, Viewport(0, 0, width, height)); | |
| 114 SK_GL(*this, ClearStencil(0)); | |
| 115 SK_GL(*this, Clear(GR_GL_STENCIL_BUFFER_BIT)); | |
| 116 | |
| 117 SK_GL_RET(*this, error, GetError()); | |
| 118 GrGLenum status; | |
| 119 SK_GL_RET(*this, status, CheckFramebufferStatus(GR_GL_FRAMEBUFFER)); | |
| 120 | |
| 121 if (GR_GL_FRAMEBUFFER_COMPLETE != status || | |
| 122 GR_GL_NO_ERROR != error) { | |
| 123 fFBO = 0; | |
| 124 fColorBufferID = 0; | |
| 125 fDepthStencilBufferID = 0; | |
| 126 fGL->unref(); | |
| 127 fGL = NULL; | |
| 128 this->destroyGLContext(); | |
| 129 return false; | |
| 130 } else { | |
| 131 return true; | |
| 132 } | |
| 133 } | |
| 134 return false; | |
| 135 } |
