C++ ShaderProgramOGL::SetTextureTransform方法代码示例

void
CanvasLayerOGL::RenderLayer(int aPreviousDestination,
                            const nsIntPoint& aOffset)
{
  FirePreTransactionCallback();
  UpdateSurface();
  if (mOGLManager->CompositingDisabled()) {
    return;
  }
  FireDidTransactionCallback();

  mOGLManager->MakeCurrent();

  // XXX We're going to need a different program depending on if
  // mGLBufferIsPremultiplied is TRUE or not.  The RGBLayerProgram
  // assumes that it's true.

  gl()->fActiveTexture(LOCAL_GL_TEXTURE0);

  if (mTexture) {
    gl()->fBindTexture(mTextureTarget, mTexture);
  }

  ShaderProgramOGL *program = nullptr;

  nsIntRect drawRect = mBounds;
  if (mDelayedUpdates) {
    NS_ABORT_IF_FALSE(mCanvasSurface || mDrawTarget, "WebGL canvases should always be using full texture upload");
    
    drawRect.IntersectRect(drawRect, GetEffectiveVisibleRegion().GetBounds());

    gfx::SurfaceFormat format =
      gl()->UploadSurfaceToTexture(mCanvasSurface,
                                   nsIntRect(0, 0, drawRect.width, drawRect.height),
                                   mUploadTexture,
                                   true,
                                   drawRect.TopLeft());
    mLayerProgram = ShaderProgramFromSurfaceFormat(format);
    mTexture = mUploadTexture;
  }

  if (!program) {
    program = mOGLManager->GetProgram(mLayerProgram, GetMaskLayer());
  }

#if defined(GL_PROVIDER_GLX)
  if (mPixmap && !mDelayedUpdates) {
    sDefGLXLib.BindTexImage(mPixmap);
  }
#endif

  gl()->ApplyFilterToBoundTexture(mFilter);

  program->Activate();
  if (mLayerProgram == RGBARectLayerProgramType ||
      mLayerProgram == RGBXRectLayerProgramType) {
    // This is used by IOSurface that use 0,0...w,h coordinate rather then 0,0..1,1.
    program->SetTexCoordMultiplier(mBounds.width, mBounds.height);
  }
  program->SetLayerQuadRect(drawRect);
  program->SetLayerTransform(GetEffectiveTransform());
  program->SetTextureTransform(gfx3DMatrix());
  program->SetLayerOpacity(GetEffectiveOpacity());
  program->SetRenderOffset(aOffset);
  program->SetTextureUnit(0);
  program->LoadMask(GetMaskLayer());

  if (gl()->CanUploadNonPowerOfTwo()) {
    mOGLManager->BindAndDrawQuad(program, mNeedsYFlip ? true : false);
  } else {
    mOGLManager->BindAndDrawQuadWithTextureRect(program, drawRect, drawRect.Size());
  }

#if defined(GL_PROVIDER_GLX)
  if (mPixmap && !mDelayedUpdates) {
    sDefGLXLib.ReleaseTexImage(mPixmap);
  }
#endif
}

//.........这里部分代码省略.........

    gl()->ApplyFilterToBoundTexture(LOCAL_GL_TEXTURE_EXTERNAL, mFilter);

    program->Activate();
    program->SetLayerQuadRect(nsIntRect(0, 0,
                                        mSize.width, mSize.height));
    program->SetLayerTransform(GetEffectiveTransform());
    program->SetLayerOpacity(GetEffectiveOpacity());
    program->SetRenderOffset(aOffset);
    program->SetTextureUnit(0);
    program->LoadMask(GetMaskLayer());

    mOGLManager->BindAndDrawQuad(program);

    // Make sure that we release the underlying external image
    gl()->fActiveTexture(LOCAL_GL_TEXTURE0);
    gl()->fBindTexture(LOCAL_GL_TEXTURE_EXTERNAL, 0);
    mExternalBufferTexture.Release();
#endif
  } else if (mSharedHandle) {
    GLContext::SharedHandleDetails handleDetails;
    if (!gl()->GetSharedHandleDetails(mShareType, mSharedHandle, handleDetails)) {
      NS_ERROR("Failed to get shared handle details");
      return;
    }

    ShaderProgramOGL* program = mOGLManager->GetProgram(handleDetails.mProgramType, GetMaskLayer());
   
    program->Activate();
    program->SetLayerTransform(GetEffectiveTransform());
    program->SetLayerOpacity(GetEffectiveOpacity());
    program->SetRenderOffset(aOffset);
    program->SetTextureUnit(0);
    program->SetTextureTransform(handleDetails.mTextureTransform);
    program->LoadMask(GetMaskLayer());

    MakeTextureIfNeeded(gl(), mTexture);
    gl()->fActiveTexture(LOCAL_GL_TEXTURE0);
    gl()->fBindTexture(handleDetails.mTarget, mTexture);
    
    if (!gl()->AttachSharedHandle(mShareType, mSharedHandle)) {
      NS_ERROR("Failed to bind shared texture handle");
      return;
    }

    gl()->fBlendFuncSeparate(LOCAL_GL_ONE, LOCAL_GL_ONE_MINUS_SRC_ALPHA,
                             LOCAL_GL_ONE, LOCAL_GL_ONE);
    gl()->ApplyFilterToBoundTexture(mFilter);
    program->SetLayerQuadRect(nsIntRect(nsIntPoint(0, 0), mSize));
    mOGLManager->BindAndDrawQuad(program, mInverted);
    gl()->fBindTexture(handleDetails.mTarget, 0);
    gl()->DetachSharedHandle(mShareType, mSharedHandle);
  } else if (mRGBTexture.IsAllocated()) {
    gl()->fActiveTexture(LOCAL_GL_TEXTURE0);
    gl()->fBindTexture(LOCAL_GL_TEXTURE_2D, mRGBTexture.GetTextureID());
    gl()->ApplyFilterToBoundTexture(mFilter);

    ShaderProgramOGL *shader = mOGLManager->GetProgram(RGBALayerProgramType, GetMaskLayer());
    shader->Activate();

    shader->SetLayerQuadRect(nsIntRect(0, 0,
                                           mPictureRect.width,
                                           mPictureRect.height));
    shader->SetTextureUnit(0);
    shader->SetLayerTransform(GetEffectiveTransform());
    shader->SetLayerOpacity(GetEffectiveOpacity());

//.........这里部分代码省略.........
      mOGLManager->GetProgram(data->mLayerProgram, GetMaskLayer());

    gl()->ApplyFilterToBoundTexture(mFilter);

    program->Activate();
    program->SetLayerQuadRect(nsIntRect(0, 0, 
                                        cairoImage->GetSize().width, 
                                        cairoImage->GetSize().height));
    program->SetLayerTransform(GetEffectiveTransform());
    program->SetLayerOpacity(GetEffectiveOpacity());
    program->SetRenderOffset(aOffset);
    program->SetTextureUnit(0);
    program->LoadMask(GetMaskLayer());

    mOGLManager->BindAndDrawQuad(program);
  } else if (image->GetFormat() == SHARED_TEXTURE) {
    SharedTextureImage* texImage =
      static_cast<SharedTextureImage*>(image);
    const SharedTextureImage::Data* data = texImage->GetData();
    GLContext::SharedHandleDetails handleDetails;
    if (!gl()->GetSharedHandleDetails(data->mShareType, data->mHandle, handleDetails)) {
      NS_ERROR("Failed to get shared handle details");
      return;
    }

    ShaderProgramOGL* program = mOGLManager->GetProgram(handleDetails.mProgramType, GetMaskLayer());

    program->Activate();
    if (handleDetails.mProgramType == gl::RGBARectLayerProgramType) {
      // 2DRect case, get the multiplier right for a sampler2DRect
      program->SetTexCoordMultiplier(data->mSize.width, data->mSize.height);
    }
    program->SetLayerTransform(GetEffectiveTransform());
    program->SetLayerOpacity(GetEffectiveOpacity());
    program->SetRenderOffset(aOffset);
    program->SetTextureUnit(0);
    program->SetTextureTransform(handleDetails.mTextureTransform);
    program->LoadMask(GetMaskLayer());

    if (!texImage->GetBackendData(LAYERS_OPENGL)) {
      AllocateTextureSharedTexture(texImage, gl(), handleDetails.mTarget);
    }

    ImageOGLBackendData *backendData =
      static_cast<ImageOGLBackendData*>(texImage->GetBackendData(LAYERS_OPENGL));
    gl()->fActiveTexture(LOCAL_GL_TEXTURE0);
    gl()->fBindTexture(handleDetails.mTarget, backendData->mTexture.GetTextureID());

    if (!gl()->AttachSharedHandle(data->mShareType, data->mHandle)) {
      NS_ERROR("Failed to bind shared texture handle");
      return;
    }

    gl()->ApplyFilterToBoundTexture(handleDetails.mTarget, mFilter);
    program->SetLayerQuadRect(nsIntRect(nsIntPoint(0, 0), data->mSize));
    mOGLManager->BindAndDrawQuad(program, data->mInverted);
    gl()->fBindTexture(handleDetails.mTarget, 0);
    gl()->DetachSharedHandle(data->mShareType, data->mHandle);
#ifdef MOZ_WIDGET_GONK
  } else if (image->GetFormat() == GONK_IO_SURFACE) {

    GonkIOSurfaceImage *ioImage = static_cast<GonkIOSurfaceImage*>(image);
    if (!ioImage) {
      return;
    }

    gl()->MakeCurrent();
    gl()->fActiveTexture(LOCAL_GL_TEXTURE0);

    if (!ioImage->GetBackendData(LAYERS_OPENGL)) {
      AllocateTextureIOSurface(ioImage, gl());
    }
    GonkIOSurfaceImageOGLBackendData *data =
      static_cast<GonkIOSurfaceImageOGLBackendData*>(ioImage->GetBackendData(LAYERS_OPENGL));

    gl()->fActiveTexture(LOCAL_GL_TEXTURE0);
    gl()->BindExternalBuffer(data->mTexture.GetTextureID(), ioImage->GetNativeBuffer());

    ShaderProgramOGL *program = mOGLManager->GetProgram(RGBAExternalLayerProgramType, GetMaskLayer());

    gl()->ApplyFilterToBoundTexture(mFilter);

    program->Activate();
    program->SetLayerQuadRect(nsIntRect(0, 0, 
                                        ioImage->GetSize().width, 
                                        ioImage->GetSize().height));
    program->SetLayerTransform(GetEffectiveTransform());
    program->SetLayerOpacity(GetEffectiveOpacity());
    program->SetRenderOffset(aOffset);
    program->SetTextureUnit(0);
    program->LoadMask(GetMaskLayer());

    mOGLManager->BindAndDrawQuadWithTextureRect(program,
                                                GetVisibleRegion().GetBounds(),
                                                nsIntSize(ioImage->GetSize().width,
                                                          ioImage->GetSize().height));
#endif
  }
  GetContainer()->NotifyPaintedImage(image);
}