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d4ddb0013c
This patch adds ImageResource as a subclass of Resource. This new class also keeps a Gfx::ImageDecoder so that we can share decoded bitmaps between all clients of an image resource inside LibWeb. With this, we now share both encoded and decoded data for images. :^) I had to change how the purgeable-volatile flag is updated to keep the volatile-images-outside-the-visible-viewport optimization working. HTMLImageElement now inherits from ImageResourceClient (a subclass of ResourceClient with additional image-specific stuff) and informs its ImageResource about whether it's inside the viewport or outside. This is pretty awesome! :^)