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Bug 588690 - Part 1: Expose ClearCachedResources on BasicLayerManagers. r=roc

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This commit is contained in:
Bas Schouten 2010-08-20 05:40:49 +02:00
parent 0b6b520e81
commit cb632a9c1b
2 changed files with 36 additions and 0 deletions
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30
gfx/layers/basic/BasicLayers.cpp
View File

@ -112,6 +112,13 @@ public:
float aOpacity) {}
virtual ShadowableLayer* AsShadowableLayer() { return nsnull; }
/**
* Layers will get this call when their layer manager is destroyed, this
* indicates they should clear resources they don't really need after their
* LayerManager ceases to exist.
*/
virtual void ClearCachedResources() {}
};
static BasicImplData*
@ -290,6 +297,8 @@ public:
LayerManager::DrawThebesLayerCallback aCallback,
void* aCallbackData,
float aOpacity);
virtual void ClearCachedResources() { mBuffer.Clear(); mValidRegion.SetEmpty(); }
virtual already_AddRefed<gfxASurface>
CreateBuffer(Buffer::ContentType aType, const nsIntSize& aSize)
@ -856,6 +865,8 @@ BasicLayerManager::~BasicLayerManager()
{
NS_ASSERTION(!InTransaction(), "Died during transaction?");
ClearCachedResources();
mRoot = nsnull;
MOZ_COUNT_DTOR(BasicLayerManager);
@ -1078,6 +1089,25 @@ BasicLayerManager::PaintLayer(Layer* aLayer,
}
}
void
BasicLayerManager::ClearCachedResources()
{
if (mRoot) {
ClearLayer(mRoot);
}
mCachedSurface.Expire();
}
void
BasicLayerManager::ClearLayer(Layer* aLayer)
{
ToData(aLayer)->ClearResources();
for (Layer* child = aLayer->GetFirstChild(); child;
child = child->GetNextSibling()) {
ClearLayer(child);
}
}
already_AddRefed<ThebesLayer>
BasicLayerManager::CreateThebesLayer()
{

6
gfx/layers/basic/BasicLayers.h
View File

@ -156,6 +156,9 @@ public:
virtual const char* Name() const { return "Basic"; }
#endif // MOZ_LAYERS_HAVE_LOG
// Clear the cached contents of this layer.
void ClearCachedResources();
protected:
#ifdef DEBUG
enum TransactionPhase {
@ -171,6 +174,9 @@ private:
void* aCallbackData,
float aOpacity);
// Clear the contents of a layer
void ClearLayer(Layer* aLayer);
already_AddRefed<gfxContext> PushGroupWithCachedSurface(gfxContext *aTarget,
gfxASurface::gfxContentType aContent,
gfxPoint *aSavedOffset);