| |
| /* |
| * Copyright 2013 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| #include "gl/SkGLContextHelper.h" |
| #include "GrGLUtil.h" |
| |
| SkGLContextHelper::SkGLContextHelper() |
| : fFBO(0) |
| , fColorBufferID(0) |
| , fDepthStencilBufferID(0) |
| , fGL(NULL) { |
| } |
| |
| SkGLContextHelper::~SkGLContextHelper() { |
| |
| if (fGL) { |
| // TODO: determine why DeleteFramebuffers is generating a GL error in tests |
| SK_GL_NOERRCHECK(*this, DeleteFramebuffers(1, &fFBO)); |
| SK_GL_NOERRCHECK(*this, DeleteRenderbuffers(1, &fColorBufferID)); |
| SK_GL_NOERRCHECK(*this, DeleteRenderbuffers(1, &fDepthStencilBufferID)); |
| } |
| |
| SkSafeUnref(fGL); |
| } |
| |
| bool SkGLContextHelper::init(int width, int height) { |
| if (fGL) { |
| fGL->unref(); |
| this->destroyGLContext(); |
| } |
| |
| fGL = this->createGLContext(); |
| if (fGL) { |
| const GrGLubyte* temp; |
| |
| if (!fGL->validate() || !fExtensions.init(fGL)) { |
| fGL = NULL; |
| this->destroyGLContext(); |
| return false; |
| } |
| |
| SK_GL_RET(*this, temp, GetString(GR_GL_VERSION)); |
| const char* versionStr = reinterpret_cast<const char*>(temp); |
| GrGLVersion version = GrGLGetVersionFromString(versionStr); |
| |
| // clear any existing GL erorrs |
| GrGLenum error; |
| do { |
| SK_GL_RET(*this, error, GetError()); |
| } while (GR_GL_NO_ERROR != error); |
| |
| SK_GL(*this, GenFramebuffers(1, &fFBO)); |
| SK_GL(*this, BindFramebuffer(GR_GL_FRAMEBUFFER, fFBO)); |
| SK_GL(*this, GenRenderbuffers(1, &fColorBufferID)); |
| SK_GL(*this, BindRenderbuffer(GR_GL_RENDERBUFFER, fColorBufferID)); |
| if (kGLES_GrGLStandard == this->gl()->fStandard) { |
| SK_GL(*this, RenderbufferStorage(GR_GL_RENDERBUFFER, |
| GR_GL_RGBA8, |
| width, height)); |
| } else { |
| SK_GL(*this, RenderbufferStorage(GR_GL_RENDERBUFFER, |
| GR_GL_RGBA, |
| width, height)); |
| } |
| SK_GL(*this, FramebufferRenderbuffer(GR_GL_FRAMEBUFFER, |
| GR_GL_COLOR_ATTACHMENT0, |
| GR_GL_RENDERBUFFER, |
| fColorBufferID)); |
| SK_GL(*this, GenRenderbuffers(1, &fDepthStencilBufferID)); |
| SK_GL(*this, BindRenderbuffer(GR_GL_RENDERBUFFER, fDepthStencilBufferID)); |
| |
| // Some drivers that support packed depth stencil will only succeed |
| // in binding a packed format an FBO. However, we can't rely on packed |
| // depth stencil being available. |
| bool supportsPackedDepthStencil; |
| if (kGLES_GrGLStandard == this->gl()->fStandard) { |
| supportsPackedDepthStencil = version >= GR_GL_VER(3,0) || |
| this->hasExtension("GL_OES_packed_depth_stencil"); |
| } else { |
| supportsPackedDepthStencil = version >= GR_GL_VER(3,0) || |
| this->hasExtension("GL_EXT_packed_depth_stencil") || |
| this->hasExtension("GL_ARB_framebuffer_object"); |
| } |
| |
| if (supportsPackedDepthStencil) { |
| // ES2 requires sized internal formats for RenderbufferStorage |
| // On Desktop we let the driver decide. |
| GrGLenum format = kGLES_GrGLStandard == this->gl()->fStandard ? |
| GR_GL_DEPTH24_STENCIL8 : |
| GR_GL_DEPTH_STENCIL; |
| SK_GL(*this, RenderbufferStorage(GR_GL_RENDERBUFFER, |
| format, |
| width, height)); |
| SK_GL(*this, FramebufferRenderbuffer(GR_GL_FRAMEBUFFER, |
| GR_GL_DEPTH_ATTACHMENT, |
| GR_GL_RENDERBUFFER, |
| fDepthStencilBufferID)); |
| } else { |
| GrGLenum format = kGLES_GrGLStandard == this->gl()->fStandard ? GR_GL_STENCIL_INDEX8 : |
| GR_GL_STENCIL_INDEX; |
| SK_GL(*this, RenderbufferStorage(GR_GL_RENDERBUFFER, |
| format, |
| width, height)); |
| } |
| SK_GL(*this, FramebufferRenderbuffer(GR_GL_FRAMEBUFFER, |
| GR_GL_STENCIL_ATTACHMENT, |
| GR_GL_RENDERBUFFER, |
| fDepthStencilBufferID)); |
| SK_GL(*this, Viewport(0, 0, width, height)); |
| SK_GL(*this, ClearStencil(0)); |
| SK_GL(*this, Clear(GR_GL_STENCIL_BUFFER_BIT)); |
| |
| SK_GL_RET(*this, error, GetError()); |
| GrGLenum status; |
| SK_GL_RET(*this, status, CheckFramebufferStatus(GR_GL_FRAMEBUFFER)); |
| |
| if (GR_GL_FRAMEBUFFER_COMPLETE != status || |
| GR_GL_NO_ERROR != error) { |
| fFBO = 0; |
| fColorBufferID = 0; |
| fDepthStencilBufferID = 0; |
| fGL->unref(); |
| fGL = NULL; |
| this->destroyGLContext(); |
| return false; |
| } else { |
| return true; |
| } |
| } |
| return false; |
| } |