void WebGLLayerChromium::updateCompositorResources(GraphicsContext3D* rendererContext, CCTextureUpdater&)
{
if (!drawsContent())
return;
if (m_dirtyRect.isEmpty())
return;
if (m_textureChanged) {
rendererContext->bindTexture(GraphicsContext3D::TEXTURE_2D, m_textureId);
// Set the min-mag filters to linear and wrap modes to GL_CLAMP_TO_EDGE
// to get around NPOT texture limitations of GLES.
rendererContext->texParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_MIN_FILTER, GraphicsContext3D::LINEAR);
rendererContext->texParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_MAG_FILTER, GraphicsContext3D::LINEAR);
rendererContext->texParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_WRAP_S, GraphicsContext3D::CLAMP_TO_EDGE);
rendererContext->texParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_WRAP_T, GraphicsContext3D::CLAMP_TO_EDGE);
m_textureChanged = false;
}
// Update the contents of the texture used by the compositor.
if (!m_dirtyRect.isEmpty() && m_textureUpdated) {
// publishToPlatformLayer prepares the contents of the off-screen render target for use by the compositor.
drawingBuffer()->publishToPlatformLayer();
context()->markLayerComposited();
m_updateRect = FloatRect(FloatPoint(), bounds());
resetNeedsDisplay();
m_textureUpdated = false;
}
}
void ContentLayerChromium::paintContentsIfDirty()
{
ASSERT(drawsContent());
updateTileSizeAndTilingOption();
const IntRect& layerRect = visibleLayerRect();
if (layerRect.isEmpty())
return;
IntRect dirty = enclosingIntRect(m_dirtyRect);
dirty.intersect(IntRect(IntPoint(), contentBounds()));
invalidateRect(dirty);
if (!drawsContent())
return;
prepareToUpdate(layerRect);
resetNeedsDisplay();
}
