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Bug 655836: Use Snapshot API for drawing one Azure canvas to another. r=roc

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This commit is contained in:
Bas Schouten 2011-10-05 01:12:23 +02:00
parent fdd511ec35
commit 37e7838c7d
1 changed files with 21 additions and 0 deletions
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21
content/canvas/src/nsCanvasRenderingContext2DAzure.cpp
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@ -3682,6 +3682,27 @@ nsCanvasRenderingContext2DAzure::DrawImage(nsIDOMElement *imgElt, float a1,
imgSize = gfxIntSize(mWidth, mHeight);
}
// Special case for Canvas, which could be an Azure canvas!
if (canvas) {
if (canvas->CountContexts() == 1) {
nsICanvasRenderingContextInternal *srcCanvas = canvas->GetContextAtIndex(0);
// This might not be an Azure canvas!
if (srcCanvas) {
srcSurf = srcCanvas->GetSurfaceSnapshot();
if (srcSurf && mCanvasElement) {
// Do security check here.
CanvasUtils::DoDrawImageSecurityCheck(HTMLCanvasElement(),
content->NodePrincipal(), canvas->IsWriteOnly(),
false);
imgSize = gfxIntSize(srcSurf->GetSize().width, srcSurf->GetSize().height);
}
}
}
}
if (!srcSurf) {
// The canvas spec says that drawImage should draw the first frame
// of animated images