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

//.........这里部分代码省略.........

    mOGLManager->BindAndDrawQuad(program);
#ifdef XP_MACOSX
  } else if (image->GetFormat() == MAC_IO_SURFACE) {
     MacIOSurfaceImage *ioImage =
       static_cast<MacIOSurfaceImage*>(image);

     if (!mOGLManager->GetThebesLayerCallback()) {
       // If its an empty transaction we still need to update
       // the plugin IO Surface and make sure we grab the
       // new image
       ioImage->Update(GetContainer());
       image = nullptr;
       autoLock.Refresh();
       image = autoLock.GetImage();
       gl()->MakeCurrent();
       ioImage = static_cast<MacIOSurfaceImage*>(image);
     }

     if (!ioImage) {
       return;
     }

     gl()->fActiveTexture(LOCAL_GL_TEXTURE0);

     if (!ioImage->GetBackendData(LAYERS_OPENGL)) {
       AllocateTextureIOSurface(ioImage, gl());
     }

     MacIOSurfaceImageOGLBackendData *data =
      static_cast<MacIOSurfaceImageOGLBackendData*>(ioImage->GetBackendData(LAYERS_OPENGL));

     gl()->fActiveTexture(LOCAL_GL_TEXTURE0);
     gl()->fBindTexture(LOCAL_GL_TEXTURE_RECTANGLE_ARB, data->mTexture.GetTextureID());

     ShaderProgramOGL *program =
       mOGLManager->GetProgram(gl::RGBARectLayerProgramType, GetMaskLayer());

     program->Activate();
     if (program->GetTexCoordMultiplierUniformLocation() != -1) {
       // 2DRect case, get the multiplier right for a sampler2DRect
       program->SetTexCoordMultiplier(ioImage->GetSize().width, ioImage->GetSize().height);
     } else {
       NS_ASSERTION(0, "no rects?");
     }

     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->BindAndDrawQuad(program);
     gl()->fBindTexture(LOCAL_GL_TEXTURE_RECTANGLE_ARB, 0);
#endif
#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);
}

//.........这里部分代码省略.........
    }
    childOffset.x = visibleRect.x;
    childOffset.y = visibleRect.y;
  } else {
    frameBuffer = aPreviousFrameBuffer;
    aContainer->mSupportsComponentAlphaChildren = (aContainer->GetContentFlags() & Layer::CONTENT_OPAQUE) ||
      (aContainer->GetParent() && aContainer->GetParent()->SupportsComponentAlphaChildren());
  }

  nsAutoTArray<Layer*, 12> children;
  aContainer->SortChildrenBy3DZOrder(children);

  /**
   * Render this container's contents.
   */
  for (uint32_t i = 0; i < children.Length(); i++) {
    LayerOGL* layerToRender = static_cast<LayerOGL*>(children.ElementAt(i)->ImplData());

    if (layerToRender->GetLayer()->GetEffectiveVisibleRegion().IsEmpty()) {
      continue;
    }

    nsIntRect scissorRect = layerToRender->GetLayer()->
        CalculateScissorRect(cachedScissor, &aManager->GetWorldTransform());
    if (scissorRect.IsEmpty()) {
      continue;
    }

    aContainer->gl()->fScissor(scissorRect.x, 
                               scissorRect.y, 
                               scissorRect.width, 
                               scissorRect.height);

    layerToRender->RenderLayer(frameBuffer, childOffset);
    aContainer->gl()->MakeCurrent();
  }


  if (needsFramebuffer) {
    // Unbind the current framebuffer and rebind the previous one.
#ifdef MOZ_DUMP_PAINTING
    if (gfxUtils::sDumpPainting) {
      nsRefPtr<gfxImageSurface> surf = 
        aContainer->gl()->GetTexImage(containerSurface, true, aManager->GetFBOLayerProgramType());

      WriteSnapshotToDumpFile(aContainer, surf);
    }
#endif
    
    // Restore the viewport
    aContainer->gl()->PopViewportRect();
    nsIntRect viewport = aContainer->gl()->ViewportRect();
    aManager->SetupPipeline(viewport.width, viewport.height,
                            LayerManagerOGL::ApplyWorldTransform);
    aContainer->gl()->PopScissorRect();
    aContainer->gl()->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, aPreviousFrameBuffer);

    if (!aManager->CompositingDisabled()) {
      aContainer->gl()->fDeleteFramebuffers(1, &frameBuffer);

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

      aContainer->gl()->fBindTexture(aManager->FBOTextureTarget(), containerSurface);

      MaskType maskType = MaskNone;
      if (aContainer->GetMaskLayer()) {
        if (!aContainer->GetTransform().CanDraw2D()) {
          maskType = Mask3d;
        } else {
          maskType = Mask2d;
        }
      }
      ShaderProgramOGL *rgb =
        aManager->GetFBOLayerProgram(maskType);

      rgb->Activate();
      rgb->SetLayerQuadRect(visibleRect);
      rgb->SetLayerTransform(transform);
      rgb->SetLayerOpacity(opacity);
      rgb->SetRenderOffset(aOffset);
      rgb->SetTextureUnit(0);
      rgb->LoadMask(aContainer->GetMaskLayer());

      if (rgb->GetTexCoordMultiplierUniformLocation() != -1) {
        // 2DRect case, get the multiplier right for a sampler2DRect
        rgb->SetTexCoordMultiplier(visibleRect.width, visibleRect.height);
      }

      // Drawing is always flipped, but when copying between surfaces we want to avoid
      // this. Pass true for the flip parameter to introduce a second flip
      // that cancels the other one out.
      aManager->BindAndDrawQuad(rgb, true);

      // Clean up resources.  This also unbinds the texture.
      aContainer->gl()->fDeleteTextures(1, &containerSurface);
    }
  } else {
    aContainer->gl()->PopScissorRect();
  }
}

//.........这里部分代码省略.........
    nsIntRect rect = GetVisibleRegion().GetBounds();

    GLContext::RectTriangles triangleBuffer;

    float tex_offset_u = float(rect.x % iwidth) / iwidth;
    float tex_offset_v = float(rect.y % iheight) / iheight;
    triangleBuffer.addRect(rect.x, rect.y,
                           rect.x + rect.width, rect.y + rect.height,
                           tex_offset_u, tex_offset_v,
                           tex_offset_u + float(rect.width) / float(iwidth),
                           tex_offset_v + float(rect.height) / float(iheight));

    GLuint vertAttribIndex =
        program->AttribLocation(ShaderProgramOGL::VertexCoordAttrib);
    GLuint texCoordAttribIndex =
        program->AttribLocation(ShaderProgramOGL::TexCoordAttrib);
    NS_ASSERTION(texCoordAttribIndex != GLuint(-1), "no texture coords?");

    gl()->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, 0);
    gl()->fVertexAttribPointer(vertAttribIndex, 2,
                               LOCAL_GL_FLOAT, LOCAL_GL_FALSE, 0,
                               triangleBuffer.vertexPointer());

    gl()->fVertexAttribPointer(texCoordAttribIndex, 2,
                               LOCAL_GL_FLOAT, LOCAL_GL_FALSE, 0,
                               triangleBuffer.texCoordPointer());
    {
        gl()->fEnableVertexAttribArray(texCoordAttribIndex);
        {
            gl()->fEnableVertexAttribArray(vertAttribIndex);
            gl()->fDrawArrays(LOCAL_GL_TRIANGLES, 0, triangleBuffer.elements());
            gl()->fDisableVertexAttribArray(vertAttribIndex);
        }
        gl()->fDisableVertexAttribArray(texCoordAttribIndex);
    }
#if defined(MOZ_WIDGET_GTK2) && !defined(MOZ_PLATFORM_MAEMO)
    if (cairoImage->mSurface && pixmap) {
        sGLXLibrary.ReleaseTexImage(pixmap);
        sGLXLibrary.DestroyPixmap(pixmap);
    }
#endif
#ifdef XP_MACOSX
  } else if (image->GetFormat() == Image::MAC_IO_SURFACE) {
     MacIOSurfaceImage *ioImage =
       static_cast<MacIOSurfaceImage*>(image);

     if (!mOGLManager->GetThebesLayerCallback()) {
       // If its an empty transaction we still need to update
       // the plugin IO Surface and make sure we grab the
       // new image
       ioImage->Update(GetContainer());
       image = nsnull;
       autoLock.Refresh();
       image = autoLock.GetImage();
       gl()->MakeCurrent();
       ioImage = static_cast<MacIOSurfaceImage*>(image);
     }

     if (!ioImage) {
       return;
     }

     gl()->fActiveTexture(LOCAL_GL_TEXTURE0);

     if (!ioImage->GetBackendData(LayerManager::LAYERS_OPENGL)) {
       AllocateTextureIOSurface(ioImage, gl());
     }

     MacIOSurfaceImageOGLBackendData *data =
      static_cast<MacIOSurfaceImageOGLBackendData*>(ioImage->GetBackendData(LayerManager::LAYERS_OPENGL));

     gl()->fActiveTexture(LOCAL_GL_TEXTURE0);
     gl()->fBindTexture(LOCAL_GL_TEXTURE_RECTANGLE_ARB, data->mTexture.GetTextureID());

     ShaderProgramOGL *program =
       mOGLManager->GetProgram(gl::RGBARectLayerProgramType, GetMaskLayer());
     
     program->Activate();
     if (program->GetTexCoordMultiplierUniformLocation() != -1) {
       // 2DRect case, get the multiplier right for a sampler2DRect
       program->SetTexCoordMultiplier(ioImage->GetSize().width, ioImage->GetSize().height);
     } else {
       NS_ASSERTION(0, "no rects?");
     }
     
     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->BindAndDrawQuad(program);
     gl()->fBindTexture(LOCAL_GL_TEXTURE_RECTANGLE_ARB, 0);
#endif
  }
  GetContainer()->NotifyPaintedImage(image);
}