void FullscreenVideoController::LayerClient::platformCALayerLayoutSublayersOfLayer(PlatformCALayer* layer) { ASSERT_ARG(layer, layer == m_parent->m_rootChild); HTMLVideoElement* videoElement = m_parent->m_videoElement.get(); if (!videoElement) return; PlatformCALayer* videoLayer = PlatformCALayer::platformCALayer(videoElement->platformLayer()); if (!videoLayer || videoLayer->superlayer() != layer) return; FloatRect layerBounds = layer->bounds(); FloatSize videoSize = videoElement->player()->naturalSize(); float scaleFactor; if (videoSize.aspectRatio() > layerBounds.size().aspectRatio()) scaleFactor = layerBounds.width() / videoSize.width(); else scaleFactor = layerBounds.height() / videoSize.height(); videoSize.scale(scaleFactor); // Calculate the centered position based on the videoBounds and layerBounds: FloatPoint videoPosition; FloatPoint videoOrigin; videoOrigin.setX((layerBounds.width() - videoSize.width()) * 0.5); videoOrigin.setY((layerBounds.height() - videoSize.height()) * 0.5); videoLayer->setPosition(videoOrigin); videoLayer->setBounds(FloatRect(FloatPoint(), videoSize)); }