1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/image/src/ClippedImage.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,97 @@
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 MOZILLA_IMAGELIB_CLIPPEDIMAGE_H_
1.10 +#define MOZILLA_IMAGELIB_CLIPPEDIMAGE_H_
1.11 +
1.12 +#include "ImageWrapper.h"
1.13 +#include "mozilla/gfx/2D.h"
1.14 +#include "mozilla/Maybe.h"
1.15 +#include "mozilla/RefPtr.h"
1.16 +
1.17 +namespace mozilla {
1.18 +namespace image {
1.19 +
1.20 +class ClippedImageCachedSurface;
1.21 +class DrawSingleTileCallback;
1.22 +
1.23 +/**
1.24 + * An Image wrapper that clips an image against a rectangle. Right now only
1.25 + * absolute coordinates in pixels are supported.
1.26 + *
1.27 + * XXX(seth): There a known (performance, not correctness) issue with
1.28 + * GetImageContainer. See the comments for that method for more information.
1.29 + */
1.30 +class ClippedImage : public ImageWrapper
1.31 +{
1.32 + typedef mozilla::gfx::SourceSurface SourceSurface;
1.33 +
1.34 +public:
1.35 + NS_DECL_ISUPPORTS
1.36 +
1.37 + virtual ~ClippedImage();
1.38 +
1.39 + virtual nsIntRect FrameRect(uint32_t aWhichFrame) MOZ_OVERRIDE;
1.40 +
1.41 + NS_IMETHOD GetWidth(int32_t* aWidth) MOZ_OVERRIDE;
1.42 + NS_IMETHOD GetHeight(int32_t* aHeight) MOZ_OVERRIDE;
1.43 + NS_IMETHOD GetIntrinsicSize(nsSize* aSize) MOZ_OVERRIDE;
1.44 + NS_IMETHOD GetIntrinsicRatio(nsSize* aRatio) MOZ_OVERRIDE;
1.45 + NS_IMETHOD_(mozilla::TemporaryRef<SourceSurface>)
1.46 + GetFrame(uint32_t aWhichFrame, uint32_t aFlags) MOZ_OVERRIDE;
1.47 + NS_IMETHOD GetImageContainer(mozilla::layers::LayerManager* aManager,
1.48 + mozilla::layers::ImageContainer** _retval) MOZ_OVERRIDE;
1.49 + NS_IMETHOD Draw(gfxContext* aContext,
1.50 + GraphicsFilter aFilter,
1.51 + const gfxMatrix& aUserSpaceToImageSpace,
1.52 + const gfxRect& aFill,
1.53 + const nsIntRect& aSubimage,
1.54 + const nsIntSize& aViewportSize,
1.55 + const SVGImageContext* aSVGContext,
1.56 + uint32_t aWhichFrame,
1.57 + uint32_t aFlags) MOZ_OVERRIDE;
1.58 + NS_IMETHOD RequestDiscard() MOZ_OVERRIDE;
1.59 + NS_IMETHOD_(Orientation) GetOrientation() MOZ_OVERRIDE;
1.60 +
1.61 +protected:
1.62 + ClippedImage(Image* aImage, nsIntRect aClip);
1.63 +
1.64 +private:
1.65 + mozilla::TemporaryRef<SourceSurface>
1.66 + GetFrameInternal(const nsIntSize& aViewportSize,
1.67 + const SVGImageContext* aSVGContext,
1.68 + uint32_t aWhichFrame,
1.69 + uint32_t aFlags);
1.70 + bool ShouldClip();
1.71 + bool MustCreateSurface(gfxContext* aContext,
1.72 + const gfxMatrix& aTransform,
1.73 + const gfxRect& aSourceRect,
1.74 + const nsIntRect& aSubimage,
1.75 + const uint32_t aFlags) const;
1.76 + gfxFloat ClampFactor(const gfxFloat aToClamp, const int aReference) const;
1.77 + nsresult DrawSingleTile(gfxContext* aContext,
1.78 + GraphicsFilter aFilter,
1.79 + const gfxMatrix& aUserSpaceToImageSpace,
1.80 + const gfxRect& aFill,
1.81 + const nsIntRect& aSubimage,
1.82 + const nsIntSize& aViewportSize,
1.83 + const SVGImageContext* aSVGContext,
1.84 + uint32_t aWhichFrame,
1.85 + uint32_t aFlags);
1.86 +
1.87 + // If we are forced to draw a temporary surface, we cache it here.
1.88 + nsAutoPtr<ClippedImageCachedSurface> mCachedSurface;
1.89 +
1.90 + nsIntRect mClip; // The region to clip to.
1.91 + Maybe<bool> mShouldClip; // Memoized ShouldClip() if present.
1.92 +
1.93 + friend class DrawSingleTileCallback;
1.94 + friend class ImageOps;
1.95 +};
1.96 +
1.97 +} // namespace image
1.98 +} // namespace mozilla
1.99 +
1.100 +#endif // MOZILLA_IMAGELIB_CLIPPEDIMAGE_H_
