Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
       2             :  * This Source Code Form is subject to the terms of the Mozilla Public
       3             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       4             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       5             : 
       6             : #include "CompositingRenderTargetOGL.h"
       7             : #include "GLContext.h"
       8             : #include "GLReadTexImageHelper.h"
       9             : #include "ScopedGLHelpers.h"
      10             : #include "mozilla/gfx/2D.h"
      11             : 
      12             : namespace mozilla {
      13             : namespace layers {
      14             : 
      15             : using namespace mozilla::gfx;
      16             : using namespace mozilla::gl;
      17             : 
      18           0 : CompositingRenderTargetOGL::~CompositingRenderTargetOGL()
      19             : {
      20           0 :   if (mGL && mGL->MakeCurrent()) {
      21           0 :     mGL->fDeleteTextures(1, &mTextureHandle);
      22           0 :     mGL->fDeleteFramebuffers(1, &mFBO);
      23             :   }
      24           0 : }
      25             : 
      26             : void
      27           0 : CompositingRenderTargetOGL::BindTexture(GLenum aTextureUnit, GLenum aTextureTarget)
      28             : {
      29           0 :   MOZ_ASSERT(mInitParams.mStatus == InitParams::INITIALIZED);
      30           0 :   MOZ_ASSERT(mTextureHandle != 0);
      31           0 :   mGL->fActiveTexture(aTextureUnit);
      32           0 :   mGL->fBindTexture(aTextureTarget, mTextureHandle);
      33           0 : }
      34             : 
      35             : void
      36           0 : CompositingRenderTargetOGL::BindRenderTarget()
      37             : {
      38           0 :   bool needsClear = false;
      39             : 
      40           0 :   if (mInitParams.mStatus != InitParams::INITIALIZED) {
      41           0 :     InitializeImpl();
      42           0 :     if (mInitParams.mInit == INIT_MODE_CLEAR) {
      43           0 :       needsClear = true;
      44           0 :       mClearOnBind = false;
      45             :     }
      46             :   } else {
      47           0 :     MOZ_ASSERT(mInitParams.mStatus == InitParams::INITIALIZED);
      48           0 :     GLuint fbo = mFBO == 0 ? mGL->GetDefaultFramebuffer() : mFBO;
      49           0 :     mGL->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, fbo);
      50           0 :     GLenum result = mGL->fCheckFramebufferStatus(LOCAL_GL_FRAMEBUFFER);
      51           0 :     if (result != LOCAL_GL_FRAMEBUFFER_COMPLETE) {
      52             :       // The main framebuffer (0) of non-offscreen contexts
      53             :       // might be backed by a EGLSurface that needs to be renewed.
      54           0 :       if (mFBO == 0 && !mGL->IsOffscreen()) {
      55           0 :         mGL->RenewSurface(mCompositor->GetWidget());
      56           0 :         result = mGL->fCheckFramebufferStatus(LOCAL_GL_FRAMEBUFFER);
      57             :       }
      58           0 :       if (result != LOCAL_GL_FRAMEBUFFER_COMPLETE) {
      59           0 :         nsAutoCString msg;
      60           0 :         msg.AppendPrintf("Framebuffer not complete -- CheckFramebufferStatus returned 0x%x, "
      61             :                          "GLContext=%p, IsOffscreen()=%d, mFBO=%d, aFBOTextureTarget=0x%x, "
      62             :                          "aRect.width=%d, aRect.height=%d",
      63           0 :                          result, mGL, mGL->IsOffscreen(), mFBO, mInitParams.mFBOTextureTarget,
      64           0 :                          mInitParams.mSize.width, mInitParams.mSize.height);
      65           0 :         NS_WARNING(msg.get());
      66             :       }
      67             :     }
      68             : 
      69           0 :     needsClear = mClearOnBind;
      70             :   }
      71             : 
      72           0 :   if (needsClear) {
      73           0 :     ScopedGLState scopedScissorTestState(mGL, LOCAL_GL_SCISSOR_TEST, true);
      74             :     ScopedScissorRect autoScissorRect(mGL, 0, 0, mInitParams.mSize.width,
      75           0 :                                       mInitParams.mSize.height);
      76           0 :     mGL->fClearColor(0.0, 0.0, 0.0, 0.0);
      77           0 :     mGL->fClearDepth(0.0);
      78           0 :     mGL->fClear(LOCAL_GL_COLOR_BUFFER_BIT | LOCAL_GL_DEPTH_BUFFER_BIT);
      79             :   }
      80           0 : }
      81             : 
      82             : #ifdef MOZ_DUMP_PAINTING
      83             : already_AddRefed<DataSourceSurface>
      84           0 : CompositingRenderTargetOGL::Dump(Compositor* aCompositor)
      85             : {
      86           0 :   MOZ_ASSERT(mInitParams.mStatus == InitParams::INITIALIZED);
      87           0 :   CompositorOGL* compositorOGL = aCompositor->AsCompositorOGL();
      88           0 :   return ReadBackSurface(mGL, mTextureHandle, true, compositorOGL->GetFBOFormat());
      89             : }
      90             : #endif
      91             : 
      92             : void
      93           0 : CompositingRenderTargetOGL::InitializeImpl()
      94             : {
      95           0 :   MOZ_ASSERT(mInitParams.mStatus == InitParams::READY);
      96             : 
      97             :   //TODO: call mGL->GetBackbufferFB(), use that
      98           0 :   GLuint fbo = mFBO == 0 ? mGL->GetDefaultFramebuffer() : mFBO;
      99           0 :   mGL->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, fbo);
     100           0 :   mGL->fFramebufferTexture2D(LOCAL_GL_FRAMEBUFFER,
     101             :                               LOCAL_GL_COLOR_ATTACHMENT0,
     102             :                               mInitParams.mFBOTextureTarget,
     103             :                               mTextureHandle,
     104           0 :                               0);
     105             : 
     106             :   // Making this call to fCheckFramebufferStatus prevents a crash on
     107             :   // PowerVR. See bug 695246.
     108           0 :   GLenum result = mGL->fCheckFramebufferStatus(LOCAL_GL_FRAMEBUFFER);
     109           0 :   if (result != LOCAL_GL_FRAMEBUFFER_COMPLETE) {
     110           0 :     nsAutoCString msg;
     111           0 :     msg.AppendPrintf("Framebuffer not complete -- error 0x%x, aFBOTextureTarget 0x%x, mFBO %d, mTextureHandle %d, aRect.width %d, aRect.height %d",
     112           0 :                       result, mInitParams.mFBOTextureTarget, mFBO, mTextureHandle, mInitParams.mSize.width, mInitParams.mSize.height);
     113           0 :     NS_ERROR(msg.get());
     114             :   }
     115             : 
     116           0 :   mInitParams.mStatus = InitParams::INITIALIZED;
     117           0 : }
     118             : 
     119             : } // namespace layers
     120             : } // namespace mozilla