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Bug 539356 - Part 31 - Call Azure canvas DidTransactionCallback even when painting from DrawWindow(). r=roc

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This commit is contained in:
Matt Woodrow 2012-08-13 22:10:57 +12:00
parent 6ac4dc5746
commit e1a83f8656
1 changed files with 13 additions and 16 deletions
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29
content/canvas/src/nsCanvasRenderingContext2DAzure.cpp
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@ -4645,23 +4645,20 @@ nsCanvasRenderingContext2DAzure::GetCanvasLayer(nsDisplayListBuilder* aBuilder,
return nullptr;
}
CanvasRenderingContext2DUserDataAzure *userData = nullptr;
if (aBuilder->IsPaintingToWindow()) {
// Make the layer tell us whenever a transaction finishes (including
// the current transaction), so we can clear our invalidation state and
// start invalidating again. We need to do this for the layer that is
// being painted to a window (there shouldn't be more than one at a time,
// and if there is, flushing the invalidation state more often than
// necessary is harmless).
// Make the layer tell us whenever a transaction finishes (including
// the current transaction), so we can clear our invalidation state and
// start invalidating again. We need to do this for all layers since
// callers of DrawWindow may be expecting to receive normal invalidation
// notifications after this paint.
// The layer will be destroyed when we tear down the presentation
// (at the latest), at which time this userData will be destroyed,
// releasing the reference to the element.
// The userData will receive DidTransactionCallbacks, which flush the
// the invalidation state to indicate that the canvas is up to date.
userData = new CanvasRenderingContext2DUserDataAzure(this);
canvasLayer->SetDidTransactionCallback(
CanvasRenderingContext2DUserDataAzure::DidTransactionCallback, userData);
}
// The layer will be destroyed when we tear down the presentation
// (at the latest), at which time this userData will be destroyed,
// releasing the reference to the element.
// The userData will receive DidTransactionCallbacks, which flush the
// the invalidation state to indicate that the canvas is up to date.
userData = new CanvasRenderingContext2DUserDataAzure(this);
canvasLayer->SetDidTransactionCallback(
CanvasRenderingContext2DUserDataAzure::DidTransactionCallback, userData);
canvasLayer->SetUserData(&g2DContextLayerUserData, userData);
CanvasLayer::Data data;