void LayerRendererChromium::copyOffscreenTextureToDisplay()
{
if (settings().compositeOffscreen) {
makeContextCurrent();
useRenderSurface(0);
TransformationMatrix drawTransform;
drawTransform.translate3d(0.5 * m_defaultRenderSurface->contentRect().width(), 0.5 * m_defaultRenderSurface->contentRect().height(), 0);
m_defaultRenderSurface->setDrawTransform(drawTransform);
m_defaultRenderSurface->setDrawOpacity(1);
m_defaultRenderSurface->draw(this, m_defaultRenderSurface->contentRect());
}
}
void LayerRendererChromium::copyOffscreenTextureToDisplay()
{
if (m_compositeOffscreen) {
makeContextCurrent();
useRenderSurface(0);
m_defaultRenderSurface->m_drawTransform.makeIdentity();
m_defaultRenderSurface->m_drawTransform.translate3d(0.5 * m_defaultRenderSurface->m_contentRect.width(),
0.5 * m_defaultRenderSurface->m_contentRect.height(), 0);
m_defaultRenderSurface->m_drawOpacity = 1;
m_defaultRenderSurface->draw(m_defaultRenderSurface->m_contentRect);
}
}
void LayerRendererChromium::drawLayersInternal()
{
if (viewportSize().isEmpty() || !rootLayer())
return;
TRACE_EVENT("LayerRendererChromium::drawLayers", this, 0);
CCLayerImpl* rootDrawLayer = rootLayer();
makeContextCurrent();
if (!rootDrawLayer->renderSurface())
rootDrawLayer->createRenderSurface();
rootDrawLayer->renderSurface()->setContentRect(IntRect(IntPoint(), viewportSize()));
rootDrawLayer->setScissorRect(IntRect(IntPoint(), viewportSize()));
CCLayerList renderSurfaceLayerList;
renderSurfaceLayerList.append(rootDrawLayer);
m_defaultRenderSurface = rootDrawLayer->renderSurface();
m_defaultRenderSurface->clearLayerList();
{
TRACE_EVENT("LayerRendererChromium::drawLayersInternal::calcDrawEtc", this, 0);
CCLayerTreeHostCommon::calculateDrawTransformsAndVisibility(rootDrawLayer, rootDrawLayer, m_zoomAnimatorTransform, m_zoomAnimatorTransform, renderSurfaceLayerList, m_defaultRenderSurface->layerList(), &m_layerSorter, m_capabilities.maxTextureSize);
}
// The GL viewport covers the entire visible area, including the scrollbars.
GLC(m_context.get(), m_context->viewport(0, 0, viewportWidth(), viewportHeight()));
m_windowMatrix = screenMatrix(0, 0, viewportWidth(), viewportHeight());
// Bind the common vertex attributes used for drawing all the layers.
m_sharedGeometry->prepareForDraw();
GLC(m_context.get(), m_context->disable(GraphicsContext3D::SCISSOR_TEST));
GLC(m_context.get(), m_context->disable(GraphicsContext3D::DEPTH_TEST));
GLC(m_context.get(), m_context->disable(GraphicsContext3D::CULL_FACE));
useRenderSurface(m_defaultRenderSurface);
if (m_zoomAnimatorTransform.isIdentity())
// Clear to blue to make it easier to spot unrendered regions.
m_context->clearColor(0, 0, 1, 1);
else
// Clear to grey, as zoom animation may leave unrendered regions.
// FIXME(wjmaclean): Render some interesting texture in unrendered regions.
m_context->clearColor(0.25, 0.25, 0.25, 1);
m_context->colorMask(true, true, true, true);
m_context->clear(GraphicsContext3D::COLOR_BUFFER_BIT);
GLC(m_context.get(), m_context->enable(GraphicsContext3D::BLEND));
GLC(m_context.get(), m_context->blendFunc(GraphicsContext3D::ONE, GraphicsContext3D::ONE_MINUS_SRC_ALPHA));
GLC(m_context.get(), m_context->enable(GraphicsContext3D::SCISSOR_TEST));
// Update the contents of the render surfaces. We traverse the array from
// back to front to guarantee that nested render surfaces get rendered in the
// correct order.
for (int surfaceIndex = renderSurfaceLayerList.size() - 1; surfaceIndex >= 0 ; --surfaceIndex) {
CCLayerImpl* renderSurfaceLayer = renderSurfaceLayerList[surfaceIndex].get();
CCRenderSurface* renderSurface = renderSurfaceLayer->renderSurface();
ASSERT(renderSurface);
renderSurface->setSkipsDraw(true);
// Render surfaces whose drawable area has zero width or height
// will have no layers associated with them and should be skipped.
if (!renderSurface->layerList().size())
continue;
// Skip completely transparent render surfaces.
if (!renderSurface->drawOpacity())
continue;
if (useRenderSurface(renderSurface)) {
renderSurface->setSkipsDraw(false);
if (renderSurfaceLayer != rootDrawLayer) {
GLC(m_context.get(), m_context->disable(GraphicsContext3D::SCISSOR_TEST));
GLC(m_context.get(), m_context->clearColor(0, 0, 0, 0));
GLC(m_context.get(), m_context->clear(GraphicsContext3D::COLOR_BUFFER_BIT));
GLC(m_context.get(), m_context->enable(GraphicsContext3D::SCISSOR_TEST));
}
const CCLayerList& layerList = renderSurface->layerList();
for (unsigned layerIndex = 0; layerIndex < layerList.size(); ++layerIndex)
drawLayer(layerList[layerIndex].get(), renderSurface);
}
}
if (m_headsUpDisplay->enabled()) {
GLC(m_context.get(), m_context->enable(GraphicsContext3D::BLEND));
GLC(m_context.get(), m_context->blendFunc(GraphicsContext3D::ONE, GraphicsContext3D::ONE_MINUS_SRC_ALPHA));
GLC(m_context.get(), m_context->disable(GraphicsContext3D::SCISSOR_TEST));
useRenderSurface(m_defaultRenderSurface);
m_headsUpDisplay->draw();
}
GLC(m_context.get(), m_context->disable(GraphicsContext3D::SCISSOR_TEST));
GLC(m_context.get(), m_context->disable(GraphicsContext3D::BLEND));
}
void LayerRendererChromium::drawLayers(const LayerList& renderSurfaceLayerList)
{
TRACE_EVENT("LayerRendererChromium::drawLayers", this, 0);
CCLayerImpl* rootDrawLayer = m_rootLayer->ccLayerImpl();
makeContextCurrent();
// The GL viewport covers the entire visible area, including the scrollbars.
GLC(m_context.get(), m_context->viewport(0, 0, m_viewportVisibleRect.width(), m_viewportVisibleRect.height()));
// Bind the common vertex attributes used for drawing all the layers.
m_sharedGeometry->prepareForDraw();
// FIXME: These calls can be made once, when the compositor context is initialized.
GLC(m_context.get(), m_context->disable(GraphicsContext3D::DEPTH_TEST));
GLC(m_context.get(), m_context->disable(GraphicsContext3D::CULL_FACE));
// Blending disabled by default. Root layer alpha channel on Windows is incorrect when Skia uses ClearType.
GLC(m_context.get(), m_context->disable(GraphicsContext3D::BLEND));
useRenderSurface(m_defaultRenderSurface);
// Clear to blue to make it easier to spot unrendered regions.
m_context->clearColor(0, 0, 1, 1);
m_context->colorMask(true, true, true, true);
m_context->clear(GraphicsContext3D::COLOR_BUFFER_BIT);
// Mask out writes to alpha channel: subpixel antialiasing via Skia results in invalid
// zero alpha values on text glyphs. The root layer is always opaque.
m_context->colorMask(true, true, true, false);
drawRootLayer();
// Re-enable color writes to layers, which may be partially transparent.
m_context->colorMask(true, true, true, true);
GLC(m_context.get(), m_context->enable(GraphicsContext3D::BLEND));
GLC(m_context.get(), m_context->blendFunc(GraphicsContext3D::ONE, GraphicsContext3D::ONE_MINUS_SRC_ALPHA));
GLC(m_context.get(), m_context->enable(GraphicsContext3D::SCISSOR_TEST));
// Update the contents of the render surfaces. We traverse the array from
// back to front to guarantee that nested render surfaces get rendered in the
// correct order.
for (int surfaceIndex = renderSurfaceLayerList.size() - 1; surfaceIndex >= 0 ; --surfaceIndex) {
CCLayerImpl* renderSurfaceLayer = renderSurfaceLayerList[surfaceIndex].get();
ASSERT(renderSurfaceLayer->renderSurface());
// Render surfaces whose drawable area has zero width or height
// will have no layers associated with them and should be skipped.
if (!renderSurfaceLayer->renderSurface()->m_layerList.size())
continue;
if (useRenderSurface(renderSurfaceLayer->renderSurface())) {
if (renderSurfaceLayer != rootDrawLayer) {
GLC(m_context.get(), m_context->disable(GraphicsContext3D::SCISSOR_TEST));
GLC(m_context.get(), m_context->clearColor(0, 0, 0, 0));
GLC(m_context.get(), m_context->clear(GraphicsContext3D::COLOR_BUFFER_BIT));
GLC(m_context.get(), m_context->enable(GraphicsContext3D::SCISSOR_TEST));
}
LayerList& layerList = renderSurfaceLayer->renderSurface()->m_layerList;
ASSERT(layerList.size());
for (unsigned layerIndex = 0; layerIndex < layerList.size(); ++layerIndex)
drawLayer(layerList[layerIndex].get(), renderSurfaceLayer->renderSurface());
}
}
if (m_headsUpDisplay->enabled()) {
GLC(m_context.get(), m_context->enable(GraphicsContext3D::BLEND));
GLC(m_context.get(), m_context->blendFunc(GraphicsContext3D::ONE, GraphicsContext3D::ONE_MINUS_SRC_ALPHA));
GLC(m_context.get(), m_context->disable(GraphicsContext3D::SCISSOR_TEST));
useRenderSurface(m_defaultRenderSurface);
m_headsUpDisplay->draw();
}
GLC(m_context.get(), m_context->disable(GraphicsContext3D::SCISSOR_TEST));
GLC(m_context.get(), m_context->disable(GraphicsContext3D::BLEND));
}
