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Bug 843618. When reading back the results of clayer ompositing to draw them to a non-deefault rendering context, don't depend on the size of the rendering context's target surface --- it could be anything. r=jrmuizel

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This commit is contained in:
Robert O'Callahan 2013-03-21 00:22:58 +13:00
parent 6939bc3c12
commit 91bf5398ad
1 changed files with 3 additions and 4 deletions
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7
gfx/layers/basic/BasicLayerManager.cpp
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@ -1153,9 +1153,10 @@ BasicShadowLayerManager::EndTransaction(DrawThebesLayerCallback aCallback,
} else if (mShadowTarget) {
if (mWidget) {
if (CompositorChild* remoteRenderer = mWidget->GetRemoteRenderer()) {
nsRefPtr<gfxASurface> target = mShadowTarget->OriginalSurface();
nsIntRect bounds;
mWidget->GetBounds(bounds);
SurfaceDescriptor inSnapshot, snapshot;
if (AllocBuffer(target->GetSize(), target->GetContentType(),
if (AllocBuffer(bounds.Size(), gfxASurface::CONTENT_COLOR_ALPHA,
&inSnapshot) &&
// The compositor will usually reuse |snapshot| and return
// it through |outSnapshot|, but if it doesn't, it's
@ -1164,8 +1165,6 @@ BasicShadowLayerManager::EndTransaction(DrawThebesLayerCallback aCallback,
AutoOpenSurface opener(OPEN_READ_ONLY, snapshot);
gfxASurface* source = opener.Get();
gfxContextAutoSaveRestore restore(mShadowTarget);
mShadowTarget->SetOperator(gfxContext::OPERATOR_OVER);
mShadowTarget->DrawSurface(source, source->GetSize());
}
if (IsSurfaceDescriptorValid(snapshot)) {