62 lines
2.0 KiB
C++
62 lines
2.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef CANVASIMAGECACHE_H_
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#define CANVASIMAGECACHE_H_
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#include "nsSize.h"
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namespace mozilla {
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namespace dom {
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class Element;
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class HTMLCanvasElement;
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} // namespace dom
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namespace gfx {
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class SourceSurface;
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} // namespace gfx
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} // namespace mozilla
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class imgIRequest;
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namespace mozilla {
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class CanvasImageCache {
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typedef mozilla::gfx::SourceSurface SourceSurface;
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public:
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/**
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* Notify that image element aImage was (or is about to be) drawn to aCanvas
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* using the first frame of aRequest's image. The data for the surface is
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* in aSurface, and the image size is in aSize.
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*/
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static void NotifyDrawImage(dom::Element* aImage,
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dom::HTMLCanvasElement* aCanvas,
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imgIRequest* aRequest,
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SourceSurface* aSource,
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const gfx::IntSize& aSize,
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bool aIsAccelerated);
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/**
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* Check whether aImage has recently been drawn into aCanvas. If we return
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* a non-null surface, then the image was recently drawn into the canvas
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* (with the same image request) and the returned surface contains the image
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* data, and the image size will be returned in aSize.
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*/
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static SourceSurface* Lookup(dom::Element* aImage,
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dom::HTMLCanvasElement* aCanvas,
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gfx::IntSize* aSize,
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bool aIsAccelerated);
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/**
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* This is the same as Lookup, except it works on any image recently drawn
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* into any canvas. Security checks need to be done again if using the
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* results from this.
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*/
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static SourceSurface* SimpleLookup(dom::Element* aImage,
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bool aIsAccelerated);
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};
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} // namespace mozilla
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#endif /* CANVASIMAGECACHE_H_ */
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