bool CCLayerTreeHost::paintMasksForRenderSurface(LayerChromium* renderSurfaceLayer, CCTextureUpdateQueue& queue) { // Note: Masks and replicas only exist for layers that own render surfaces. If we reach this point // in code, we already know that at least something will be drawn into this render surface, so the // mask and replica should be painted. bool needMoreUpdates = false; LayerChromium* maskLayer = renderSurfaceLayer->maskLayer(); if (maskLayer) { maskLayer->update(queue, 0, m_renderingStats); needMoreUpdates |= maskLayer->needMoreUpdates(); } LayerChromium* replicaMaskLayer = renderSurfaceLayer->replicaLayer() ? renderSurfaceLayer->replicaLayer()->maskLayer() : 0; if (replicaMaskLayer) { replicaMaskLayer->update(queue, 0, m_renderingStats); needMoreUpdates |= replicaMaskLayer->needMoreUpdates(); } return needMoreUpdates; }