1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/canvas/src/CanvasImageCache.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,51 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
1.5 + * This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#ifndef CANVASIMAGECACHE_H_
1.10 +#define CANVASIMAGECACHE_H_
1.11 +
1.12 +#include "nsSize.h"
1.13 +
1.14 +namespace mozilla {
1.15 +namespace dom {
1.16 +class Element;
1.17 +class HTMLCanvasElement;
1.18 +} // namespace dom
1.19 +namespace gfx {
1.20 +class SourceSurface;
1.21 +} // namespace gfx
1.22 +} // namespace mozilla
1.23 +class imgIRequest;
1.24 +
1.25 +namespace mozilla {
1.26 +
1.27 +class CanvasImageCache {
1.28 + typedef mozilla::gfx::SourceSurface SourceSurface;
1.29 +public:
1.30 + /**
1.31 + * Notify that image element aImage was (or is about to be) drawn to aCanvas
1.32 + * using the first frame of aRequest's image. The data for the surface is
1.33 + * in aSurface, and the image size is in aSize.
1.34 + */
1.35 + static void NotifyDrawImage(dom::Element* aImage,
1.36 + dom::HTMLCanvasElement* aCanvas,
1.37 + imgIRequest* aRequest,
1.38 + SourceSurface* aSource,
1.39 + const gfxIntSize& aSize);
1.40 +
1.41 + /**
1.42 + * Check whether aImage has recently been drawn into aCanvas. If we return
1.43 + * a non-null surface, then the image was recently drawn into the canvas
1.44 + * (with the same image request) and the returned surface contains the image
1.45 + * data, and the image size will be returned in aSize.
1.46 + */
1.47 + static SourceSurface* Lookup(dom::Element* aImage,
1.48 + dom::HTMLCanvasElement* aCanvas,
1.49 + gfxIntSize* aSize);
1.50 +};
1.51 +
1.52 +}
1.53 +
1.54 +#endif /* CANVASIMAGECACHE_H_ */
