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| 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 te
sts |
| 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(GrGLStandard forcedGpuAPI, int width, |
| 31 int height) { |
| 32 if (fGL) { |
| 33 fGL->unref(); |
| 34 this->destroyGLContext(); |
| 35 } |
| 36 |
| 37 fGL = this->createGLContext(forcedGpuAPI); |
| 38 if (fGL) { |
| 39 const GrGLubyte* temp; |
| 40 |
| 41 if (!fGL->validate()) { |
| 42 fGL = NULL; |
| 43 this->destroyGLContext(); |
| 44 return false; |
| 45 } |
| 46 |
| 47 SK_GL_RET(*this, temp, GetString(GR_GL_VERSION)); |
| 48 const char* versionStr = reinterpret_cast<const char*>(temp); |
| 49 GrGLVersion version = GrGLGetVersionFromString(versionStr); |
| 50 |
| 51 // clear any existing GL erorrs |
| 52 GrGLenum error; |
| 53 do { |
| 54 SK_GL_RET(*this, error, GetError()); |
| 55 } while (GR_GL_NO_ERROR != error); |
| 56 |
| 57 SK_GL(*this, GenFramebuffers(1, &fFBO)); |
| 58 SK_GL(*this, BindFramebuffer(GR_GL_FRAMEBUFFER, fFBO)); |
| 59 SK_GL(*this, GenRenderbuffers(1, &fColorBufferID)); |
| 60 SK_GL(*this, BindRenderbuffer(GR_GL_RENDERBUFFER, fColorBufferID)); |
| 61 if (kGLES_GrGLStandard == this->gl()->fStandard) { |
| 62 SK_GL(*this, RenderbufferStorage(GR_GL_RENDERBUFFER, |
| 63 GR_GL_RGBA8, |
| 64 width, height)); |
| 65 } else { |
| 66 SK_GL(*this, RenderbufferStorage(GR_GL_RENDERBUFFER, |
| 67 GR_GL_RGBA, |
| 68 width, height)); |
| 69 } |
| 70 SK_GL(*this, FramebufferRenderbuffer(GR_GL_FRAMEBUFFER, |
| 71 GR_GL_COLOR_ATTACHMENT0, |
| 72 GR_GL_RENDERBUFFER, |
| 73 fColorBufferID)); |
| 74 SK_GL(*this, GenRenderbuffers(1, &fDepthStencilBufferID)); |
| 75 SK_GL(*this, BindRenderbuffer(GR_GL_RENDERBUFFER, fDepthStencilBufferID)
); |
| 76 |
| 77 // Some drivers that support packed depth stencil will only succeed |
| 78 // in binding a packed format an FBO. However, we can't rely on packed |
| 79 // depth stencil being available. |
| 80 bool supportsPackedDepthStencil; |
| 81 if (kGLES_GrGLStandard == this->gl()->fStandard) { |
| 82 supportsPackedDepthStencil = version >= GR_GL_VER(3,0) || |
| 83 this->hasExtension("GL_OES_packed_depth
_stencil"); |
| 84 } else { |
| 85 supportsPackedDepthStencil = version >= GR_GL_VER(3,0) || |
| 86 this->hasExtension("GL_EXT_packed_depth
_stencil") || |
| 87 this->hasExtension("GL_ARB_framebuffer_
object"); |
| 88 } |
| 89 |
| 90 if (supportsPackedDepthStencil) { |
| 91 // ES2 requires sized internal formats for RenderbufferStorage |
| 92 // On Desktop we let the driver decide. |
| 93 GrGLenum format = kGLES_GrGLStandard == this->gl()->fStandard ? |
| 94 GR_GL_DEPTH24_STENCIL8 : |
| 95 GR_GL_DEPTH_STENCIL; |
| 96 SK_GL(*this, RenderbufferStorage(GR_GL_RENDERBUFFER, |
| 97 format, |
| 98 width, height)); |
| 99 SK_GL(*this, FramebufferRenderbuffer(GR_GL_FRAMEBUFFER, |
| 100 GR_GL_DEPTH_ATTACHMENT, |
| 101 GR_GL_RENDERBUFFER, |
| 102 fDepthStencilBufferID)); |
| 103 } else { |
| 104 GrGLenum format = kGLES_GrGLStandard == this->gl()->fStandard ? GR_G
L_STENCIL_INDEX8 : |
| 105 GR_GL_
STENCIL_INDEX; |
| 106 SK_GL(*this, RenderbufferStorage(GR_GL_RENDERBUFFER, |
| 107 format, |
| 108 width, height)); |
| 109 } |
| 110 SK_GL(*this, FramebufferRenderbuffer(GR_GL_FRAMEBUFFER, |
| 111 GR_GL_STENCIL_ATTACHMENT, |
| 112 GR_GL_RENDERBUFFER, |
| 113 fDepthStencilBufferID)); |
| 114 SK_GL(*this, Viewport(0, 0, width, height)); |
| 115 SK_GL(*this, ClearStencil(0)); |
| 116 SK_GL(*this, Clear(GR_GL_STENCIL_BUFFER_BIT)); |
| 117 |
| 118 SK_GL_RET(*this, error, GetError()); |
| 119 GrGLenum status; |
| 120 SK_GL_RET(*this, status, CheckFramebufferStatus(GR_GL_FRAMEBUFFER)); |
| 121 |
| 122 if (GR_GL_FRAMEBUFFER_COMPLETE != status || |
| 123 GR_GL_NO_ERROR != error) { |
| 124 fFBO = 0; |
| 125 fColorBufferID = 0; |
| 126 fDepthStencilBufferID = 0; |
| 127 fGL->unref(); |
| 128 fGL = NULL; |
| 129 this->destroyGLContext(); |
| 130 return false; |
| 131 } else { |
| 132 return true; |
| 133 } |
| 134 } |
| 135 return false; |
| 136 } |
| 137 |
| 138 void SkGLContextHelper::testAbandon() { |
| 139 if (fGL) { |
| 140 fGL->abandon(); |
| 141 } |
| 142 } |
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