/* static */ bool
LayerManagerComposite::AddMaskEffect(Layer* aMaskLayer, EffectChain& aEffects, bool aIs3D)
{
if (!aMaskLayer) {
return false;
}
LayerComposite* maskLayerComposite = static_cast<LayerComposite*>(aMaskLayer->ImplData());
if (!maskLayerComposite->GetCompositableHost()) {
NS_WARNING("Mask layer with no compositable host");
return false;
}
gfx::Matrix4x4 transform;
ToMatrix4x4(aMaskLayer->GetEffectiveTransform(), transform);
return maskLayerComposite->GetCompositableHost()->AddMaskEffect(aEffects, transform, aIs3D);
}
/* static */ void
LayerManagerComposite::ComputeRenderIntegrityInternal(Layer* aLayer,
nsIntRegion& aScreenRegion,
nsIntRegion& aLowPrecisionScreenRegion,
const Matrix4x4& aTransform)
{
if (aLayer->GetOpacity() <= 0.f ||
(aScreenRegion.IsEmpty() && aLowPrecisionScreenRegion.IsEmpty())) {
return;
}
// If the layer's a container, recurse into all of its children
ContainerLayer* container = aLayer->AsContainerLayer();
if (container) {
// Accumulate the transform of intermediate surfaces
Matrix4x4 transform = aTransform;
if (container->UseIntermediateSurface()) {
transform = aLayer->GetEffectiveTransform();
transform = aTransform * transform;
}
for (Layer* child = aLayer->GetFirstChild(); child;
child = child->GetNextSibling()) {
ComputeRenderIntegrityInternal(child, aScreenRegion, aLowPrecisionScreenRegion, transform);
}
return;
}
// Only painted layers can be incomplete
PaintedLayer* paintedLayer = aLayer->AsPaintedLayer();
if (!paintedLayer) {
return;
}
// See if there's any incomplete rendering
nsIntRegion incompleteRegion = aLayer->GetEffectiveVisibleRegion();
incompleteRegion.Sub(incompleteRegion, paintedLayer->GetValidRegion());
if (!incompleteRegion.IsEmpty()) {
// Calculate the transform to get between screen and layer space
Matrix4x4 transformToScreen = aLayer->GetEffectiveTransform();
transformToScreen = aTransform * transformToScreen;
SubtractTransformedRegion(aScreenRegion, incompleteRegion, transformToScreen);
// See if there's any incomplete low-precision rendering
TiledContentHost* composer = nullptr;
LayerComposite* shadow = aLayer->AsLayerComposite();
if (shadow) {
composer = shadow->GetCompositableHost()->AsTiledContentHost();
if (composer) {
incompleteRegion.Sub(incompleteRegion, composer->GetValidLowPrecisionRegion());
if (!incompleteRegion.IsEmpty()) {
SubtractTransformedRegion(aLowPrecisionScreenRegion, incompleteRegion, transformToScreen);
}
}
}
// If we can't get a valid low precision region, assume it's the same as
// the high precision region.
if (!composer) {
SubtractTransformedRegion(aLowPrecisionScreenRegion, incompleteRegion, transformToScreen);
}
}
}