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CompositingRenderTargetOGL.cpp (4240B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #include "CompositingRenderTargetOGL.h"
      8 #include "GLContext.h"
      9 #include "GLReadTexImageHelper.h"
     10 #include "ScopedGLHelpers.h"
     11 #include "mozilla/gfx/2D.h"
     12 
     13 namespace mozilla {
     14 namespace layers {
     15 
     16 using namespace mozilla::gfx;
     17 using namespace mozilla::gl;
     18 
     19 CompositingRenderTargetOGL::~CompositingRenderTargetOGL() {
     20  if (mGLResourceOwnership == GLResourceOwnership::OWNED_BY_RENDER_TARGET &&
     21      mGL && mGL->MakeCurrent()) {
     22    mGL->fDeleteTextures(1, &mTextureHandle);
     23    mGL->fDeleteFramebuffers(1, &mFBO);
     24  }
     25 }
     26 
     27 void CompositingRenderTargetOGL::BindTexture(GLenum aTextureUnit,
     28                                             GLenum aTextureTarget) {
     29  MOZ_ASSERT(!mNeedInitialization);
     30  MOZ_ASSERT(mTextureHandle != 0);
     31  mGL->fActiveTexture(aTextureUnit);
     32  mGL->fBindTexture(aTextureTarget, mTextureHandle);
     33 }
     34 
     35 void CompositingRenderTargetOGL::BindRenderTarget() {
     36  bool needsClear = false;
     37 
     38  if (mNeedInitialization) {
     39    Initialize(mNeedInitialization->mFBOTextureTarget);
     40    if (mNeedInitialization->mInitMode == INIT_MODE_CLEAR) {
     41      needsClear = true;
     42      mClearOnBind = false;
     43    }
     44    mNeedInitialization = Nothing();
     45  } else {
     46    GLuint fbo = GetFBO();
     47    mGL->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, fbo);
     48    GLenum result = mGL->fCheckFramebufferStatus(LOCAL_GL_FRAMEBUFFER);
     49    if (result != LOCAL_GL_FRAMEBUFFER_COMPLETE) {
     50      // The main framebuffer (0) of non-offscreen contexts
     51      // might be backed by a EGLSurface that needs to be renewed.
     52      if (mFBO == 0 && !mGL->IsOffscreen()) {
     53        mGL->RenewSurface(mCompositor->GetWidget());
     54        result = mGL->fCheckFramebufferStatus(LOCAL_GL_FRAMEBUFFER);
     55      }
     56      if (result != LOCAL_GL_FRAMEBUFFER_COMPLETE) {
     57        nsAutoCString msg;
     58        msg.AppendPrintf(
     59            "Framebuffer not complete -- CheckFramebufferStatus returned 0x%x, "
     60            "GLContext=%p, IsOffscreen()=%d, mFBO=%d, "
     61            "aRect.width=%d, aRect.height=%d",
     62            result, mGL.get(), mGL->IsOffscreen(), mFBO, mSize.width,
     63            mSize.height);
     64        NS_WARNING(msg.get());
     65      }
     66    }
     67 
     68    needsClear = mClearOnBind;
     69  }
     70 
     71  if (needsClear) {
     72    ScopedGLState scopedScissorTestState(mGL, LOCAL_GL_SCISSOR_TEST, true);
     73    ScopedScissorRect autoScissorRect(mGL, 0, 0, mSize.width, mSize.height);
     74    mGL->fClearColor(0.0, 0.0, 0.0, 0.0);
     75    mGL->fClearDepth(0.0);
     76    mGL->fClear(LOCAL_GL_COLOR_BUFFER_BIT | LOCAL_GL_DEPTH_BUFFER_BIT);
     77  }
     78 }
     79 
     80 GLuint CompositingRenderTargetOGL::GetFBO() const {
     81  MOZ_ASSERT(!mNeedInitialization);
     82  return mFBO == 0 ? mGL->GetDefaultFramebuffer() : mFBO;
     83 }
     84 
     85 #ifdef MOZ_DUMP_PAINTING
     86 already_AddRefed<DataSourceSurface> CompositingRenderTargetOGL::Dump(
     87    Compositor* aCompositor) {
     88  MOZ_ASSERT(!mNeedInitialization);
     89  CompositorOGL* compositorOGL = aCompositor->AsCompositorOGL();
     90  return ReadBackSurface(mGL, mTextureHandle, true,
     91                         compositorOGL->GetFBOFormat());
     92 }
     93 #endif
     94 
     95 void CompositingRenderTargetOGL::Initialize(GLenum aFBOTextureTarget) {
     96  // TODO: call mGL->GetBackbufferFB(), use that
     97  GLuint fbo = mFBO == 0 ? mGL->GetDefaultFramebuffer() : mFBO;
     98  mGL->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, fbo);
     99  mGL->fFramebufferTexture2D(LOCAL_GL_FRAMEBUFFER, LOCAL_GL_COLOR_ATTACHMENT0,
    100                             aFBOTextureTarget, mTextureHandle, 0);
    101 
    102  // Making this call to fCheckFramebufferStatus prevents a crash on
    103  // PowerVR. See bug 695246.
    104  GLenum result = mGL->fCheckFramebufferStatus(LOCAL_GL_FRAMEBUFFER);
    105  if (result != LOCAL_GL_FRAMEBUFFER_COMPLETE) {
    106    nsAutoCString msg;
    107    msg.AppendPrintf(
    108        "Framebuffer not complete -- error 0x%x, aFBOTextureTarget 0x%x, mFBO "
    109        "%d, mTextureHandle %d, aRect.width %d, aRect.height %d",
    110        result, aFBOTextureTarget, mFBO, mTextureHandle, mSize.width,
    111        mSize.height);
    112    NS_ERROR(msg.get());
    113  }
    114 }
    115 
    116 }  // namespace layers
    117 }  // namespace mozilla