michael@0: /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "CompositingRenderTargetOGL.h"
michael@0: #include "GLContext.h"
michael@0: #include "GLReadTexImageHelper.h"
michael@0: #include "mozilla/gfx/2D.h"
michael@0: 
michael@0: using namespace mozilla;
michael@0: using namespace mozilla::gfx;
michael@0: using namespace mozilla::gl;
michael@0: using namespace mozilla::layers;
michael@0: 
michael@0: CompositingRenderTargetOGL::~CompositingRenderTargetOGL()
michael@0: {
michael@0:   mGL->fDeleteTextures(1, &mTextureHandle);
michael@0:   mGL->fDeleteFramebuffers(1, &mFBO);
michael@0: }
michael@0: 
michael@0: void
michael@0: CompositingRenderTargetOGL::BindTexture(GLenum aTextureUnit, GLenum aTextureTarget)
michael@0: {
michael@0:   MOZ_ASSERT(mInitParams.mStatus == InitParams::INITIALIZED);
michael@0:   MOZ_ASSERT(mTextureHandle != 0);
michael@0:   mGL->fActiveTexture(aTextureUnit);
michael@0:   mGL->fBindTexture(aTextureTarget, mTextureHandle);
michael@0: }
michael@0: 
michael@0: void
michael@0: CompositingRenderTargetOGL::BindRenderTarget()
michael@0: {
michael@0:   if (mInitParams.mStatus != InitParams::INITIALIZED) {
michael@0:     InitializeImpl();
michael@0:   } else {
michael@0:     MOZ_ASSERT(mInitParams.mStatus == InitParams::INITIALIZED);
michael@0:     mGL->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, mFBO);
michael@0:     GLenum result = mGL->fCheckFramebufferStatus(LOCAL_GL_FRAMEBUFFER);
michael@0:     if (result != LOCAL_GL_FRAMEBUFFER_COMPLETE) {
michael@0:       // The main framebuffer (0) of non-offscreen contexts
michael@0:       // might be backed by a EGLSurface that needs to be renewed.
michael@0:       if (mFBO == 0 && !mGL->IsOffscreen()) {
michael@0:         mGL->RenewSurface();
michael@0:         result = mGL->fCheckFramebufferStatus(LOCAL_GL_FRAMEBUFFER);
michael@0:       }
michael@0:       if (result != LOCAL_GL_FRAMEBUFFER_COMPLETE) {
michael@0:         nsAutoCString msg;
michael@0:         msg.AppendPrintf("Framebuffer not complete -- CheckFramebufferStatus returned 0x%x, "
michael@0:                          "GLContext=%p, IsOffscreen()=%d, mFBO=%d, aFBOTextureTarget=0x%x, "
michael@0:                          "aRect.width=%d, aRect.height=%d",
michael@0:                          result, mGL, mGL->IsOffscreen(), mFBO, mInitParams.mFBOTextureTarget,
michael@0:                          mInitParams.mSize.width, mInitParams.mSize.height);
michael@0:         NS_WARNING(msg.get());
michael@0:       }
michael@0:     }
michael@0: 
michael@0:     mCompositor->PrepareViewport(mInitParams.mSize, mTransform);
michael@0:   }
michael@0: }
michael@0: 
michael@0: #ifdef MOZ_DUMP_PAINTING
michael@0: TemporaryRef<DataSourceSurface>
michael@0: CompositingRenderTargetOGL::Dump(Compositor* aCompositor)
michael@0: {
michael@0:   MOZ_ASSERT(mInitParams.mStatus == InitParams::INITIALIZED);
michael@0:   CompositorOGL* compositorOGL = static_cast<CompositorOGL*>(aCompositor);
michael@0:   return ReadBackSurface(mGL, mTextureHandle, true, compositorOGL->GetFBOFormat());
michael@0: }
michael@0: #endif
michael@0: 
michael@0: void
michael@0: CompositingRenderTargetOGL::InitializeImpl()
michael@0: {
michael@0:   MOZ_ASSERT(mInitParams.mStatus == InitParams::READY);
michael@0: 
michael@0:   mGL->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, mFBO);
michael@0:   mGL->fFramebufferTexture2D(LOCAL_GL_FRAMEBUFFER,
michael@0:                               LOCAL_GL_COLOR_ATTACHMENT0,
michael@0:                               mInitParams.mFBOTextureTarget,
michael@0:                               mTextureHandle,
michael@0:                               0);
michael@0: 
michael@0:   // Making this call to fCheckFramebufferStatus prevents a crash on
michael@0:   // PowerVR. See bug 695246.
michael@0:   GLenum result = mGL->fCheckFramebufferStatus(LOCAL_GL_FRAMEBUFFER);
michael@0:   if (result != LOCAL_GL_FRAMEBUFFER_COMPLETE) {
michael@0:     nsAutoCString msg;
michael@0:     msg.AppendPrintf("Framebuffer not complete -- error 0x%x, aFBOTextureTarget 0x%x, mFBO %d, mTextureHandle %d, aRect.width %d, aRect.height %d",
michael@0:                       result, mInitParams.mFBOTextureTarget, mFBO, mTextureHandle, mInitParams.mSize.width, mInitParams.mSize.height);
michael@0:     NS_ERROR(msg.get());
michael@0:   }
michael@0: 
michael@0:   mCompositor->PrepareViewport(mInitParams.mSize, mTransform);
michael@0:   mGL->fScissor(0, 0, mInitParams.mSize.width, mInitParams.mSize.height);
michael@0:   if (mInitParams.mInit == INIT_MODE_CLEAR) {
michael@0:     mGL->fClearColor(0.0, 0.0, 0.0, 0.0);
michael@0:     mGL->fClear(LOCAL_GL_COLOR_BUFFER_BIT);
michael@0:   }
michael@0: 
michael@0:   mInitParams.mStatus = InitParams::INITIALIZED;
michael@0: }