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Bug 1097464 - Part 6: Handle preserves-3d by compositor. r=roc

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Remove WrapPreserve3DList() and replaced it by creating a
nsDisplayTransform item for each transformed frame.

 - Add an additional item for each top frame extending 3D context to
   separate consequence contexts.

 - Effective transform of a layer is the accumulation of ancestors in
   the same 3D context.

 - The layers creating new context and extended by children need a
   temporary buffer if it's effective transform is not 2D.

 - Clip rects are accumulated along the context chain.

 - Visible rects of items are computed from dirty regions of the frame
   creating the context and accumulated transforms.

 - Bounds of items are computed from accumulated transforms and
   accumulated bounds of the descent frames.

 - Backface hidden is handled by compositor and BasicLayerManager.
This commit is contained in:
Thinker K.F. Li
2015-09-17 03:31:00 +02:00
parent 9e548da5a7
commit af80f65bac
14 changed files with 858 additions and 291 deletions
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44
gfx/layers/basic/BasicContainerLayer.cpp
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@@ -39,22 +39,32 @@ BasicContainerLayer::ComputeEffectiveTransforms(const Matrix4x4& aTransformToSur
// containers.
Matrix residual;
Matrix4x4 idealTransform = GetLocalTransform() * aTransformToSurface;
idealTransform.ProjectTo2D();
if (!Extend3DContext() && !Is3DContextLeaf()) {
// For 3D transform leaked from extended parent layer.
idealTransform.ProjectTo2D();
}
if (!idealTransform.CanDraw2D()) {
if (!Extend3DContext() ||
(!idealTransform.Is2D() && Creates3DContextWithExtendingChildren())) {
if (!Creates3DContextWithExtendingChildren()) {
idealTransform.ProjectTo2D();
}
mEffectiveTransform = idealTransform;
ComputeEffectiveTransformsForChildren(Matrix4x4());
ComputeEffectiveTransformForMaskLayers(Matrix4x4());
mUseIntermediateSurface = true;
return;
}
mEffectiveTransform = idealTransform;
ComputeEffectiveTransformsForChildren(Matrix4x4());
ComputeEffectiveTransformForMaskLayers(Matrix4x4());
mUseIntermediateSurface = true;
ComputeEffectiveTransformsForChildren(idealTransform);
ComputeEffectiveTransformForMaskLayers(idealTransform);
mUseIntermediateSurface = false;
return;
}
mEffectiveTransform = SnapTransformTranslation(idealTransform, &residual);
// We always pass the ideal matrix down to our children, so there is no
// need to apply any compensation using the residual from SnapTransformTranslation.
ComputeEffectiveTransformsForChildren(idealTransform);
ComputeEffectiveTransformForMaskLayers(aTransformToSurface);
// With 2D transform or extended 3D context.
Layer* child = GetFirstChild();
bool hasSingleBlendingChild = false;
@@ -74,6 +84,20 @@ BasicContainerLayer::ComputeEffectiveTransforms(const Matrix4x4& aTransformToSur
GetForceIsolatedGroup() ||
(GetMixBlendMode() != CompositionOp::OP_OVER && HasMultipleChildren()) ||
(GetEffectiveOpacity() != 1.0 && (HasMultipleChildren() || hasSingleBlendingChild));
if (!Extend3DContext()) {
idealTransform.ProjectTo2D();
}
mEffectiveTransform =
!mUseIntermediateSurface ?
idealTransform : SnapTransformTranslation(idealTransform, &residual);
Matrix4x4 childTransformToSurface =
(!mUseIntermediateSurface ||
(mUseIntermediateSurface && !Extend3DContext() /* 2D */)) ?
idealTransform : Matrix4x4::From2D(residual);
ComputeEffectiveTransformsForChildren(childTransformToSurface);
ComputeEffectiveTransformForMaskLayers(aTransformToSurface);
}
bool