void
ReadbackProcessor::BuildUpdatesForLayer(ReadbackLayer* aLayer)
{
if (!aLayer->mSink)
return;
nsIntPoint offset;
Layer* newBackground = FindBackgroundLayer(aLayer, &offset);
if (!newBackground) {
aLayer->SetUnknown();
return;
}
if (newBackground->GetType() == Layer::TYPE_COLOR) {
ColorLayer* colorLayer = static_cast<ColorLayer*>(newBackground);
if (aLayer->mBackgroundColor != colorLayer->GetColor()) {
aLayer->mBackgroundLayer = nullptr;
aLayer->mBackgroundColor = colorLayer->GetColor();
NS_ASSERTION(aLayer->mBackgroundColor.a == 1.0,
"Color layer said it was opaque!");
nsRefPtr<gfxContext> ctx =
aLayer->mSink->BeginUpdate(aLayer->GetRect(),
aLayer->AllocateSequenceNumber());
if (ctx) {
ctx->SetColor(aLayer->mBackgroundColor);
nsIntSize size = aLayer->GetSize();
ctx->Rectangle(gfxRect(0, 0, size.width, size.height));
ctx->Fill();
aLayer->mSink->EndUpdate(ctx, aLayer->GetRect());
}
}
} else {
NS_ASSERTION(newBackground->AsThebesLayer(), "Must be ThebesLayer");
ThebesLayer* thebesLayer = static_cast<ThebesLayer*>(newBackground);
// updateRect is relative to the ThebesLayer
nsIntRect updateRect = aLayer->GetRect() - offset;
if (thebesLayer != aLayer->mBackgroundLayer ||
offset != aLayer->mBackgroundLayerOffset) {
aLayer->mBackgroundLayer = thebesLayer;
aLayer->mBackgroundLayerOffset = offset;
aLayer->mBackgroundColor = gfxRGBA(0,0,0,0);
thebesLayer->SetUsedForReadback(true);
} else {
nsIntRegion invalid;
invalid.Sub(updateRect, thebesLayer->GetValidRegion());
updateRect = invalid.GetBounds();
}
Update update = { aLayer, updateRect, aLayer->AllocateSequenceNumber() };
mAllUpdates.AppendElement(update);
}
}
void
ContainerLayer::DidRemoveChild(Layer* aLayer)
{
ThebesLayer* tl = aLayer->AsThebesLayer();
if (tl && tl->UsedForReadback()) {
for (Layer* l = mFirstChild; l; l = l->GetNextSibling()) {
if (l->GetType() == TYPE_READBACK) {
static_cast<ReadbackLayer*>(l)->NotifyThebesLayerRemoved(tl);
}
}
}
if (aLayer->GetType() == TYPE_READBACK) {
static_cast<ReadbackLayer*>(aLayer)->NotifyRemoved();
}
}
/* 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 thebes layers can be incomplete
ThebesLayer* thebesLayer = aLayer->AsThebesLayer();
if (!thebesLayer) {
return;
}
// See if there's any incomplete rendering
nsIntRegion incompleteRegion = aLayer->GetEffectiveVisibleRegion();
incompleteRegion.Sub(incompleteRegion, thebesLayer->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
TiledLayerComposer* composer = nullptr;
LayerComposite* shadow = aLayer->AsLayerComposite();
if (shadow) {
composer = shadow->GetTiledLayerComposer();
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);
}
}
}
