SourceSurface*
CanvasImageCache::Lookup(Element* aImage,
HTMLCanvasElement* aCanvas,
gfx::IntSize* aSize)
{
if (!gImageCache)
return nullptr;
ImageCacheEntry* entry = gImageCache->mCache.GetEntry(ImageCacheKey(aImage, aCanvas));
if (!entry || !entry->mData->mILC)
return nullptr;
nsCOMPtr<imgIRequest> request;
entry->mData->mILC->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST, getter_AddRefs(request));
if (request != entry->mData->mRequest)
return nullptr;
gImageCache->MarkUsed(entry->mData);
*aSize = entry->mData->mSize;
return entry->mData->mSourceSurface;
}
SourceSurface* CanvasImageCache::LookupCanvas(Element* aImage,
HTMLCanvasElement* aCanvas,
IntSize* aSizeOut) {
if (!gImageCache) {
return nullptr;
}
nsCOMPtr<imgIContainer> imgContainer = GetImageContainer(aImage);
if (!imgContainer) {
return nullptr;
}
ImageCacheEntry* entry =
gImageCache->mCache.GetEntry(ImageCacheKey(imgContainer, aCanvas));
if (!entry) {
return nullptr;
}
MOZ_ASSERT(aSizeOut);
gImageCache->MarkUsed(entry->mData);
*aSizeOut = entry->mData->mSize;
return entry->mData->mSourceSurface;
}
virtual void NotifyExpired(ImageCacheEntryData* aObject)
{
RemoveObject(aObject);
// Deleting the entry will delete aObject since the entry owns aObject
mCache.RemoveEntry(ImageCacheKey(aObject->mImage, aObject->mCanvas));
}
