image/src/OrientedImage.h
author Oleg Romashin <oleg.romashin@microsoft.com>
Wed, 20 Nov 2013 16:08:36 -0800
changeset 157013 0752cf4780e0b726a238607d8c1135a1cf176875
parent 149846 dbff283df8c12c3340ae54d13f363a7eae8386fe
child 160685 826415ddd250964cbef76e9ea5a554c89cb9744d
permissions -rw-r--r--
Backed out 3 changesets (bug 822898) for mochitest bustage on B2G ICS emulator

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef MOZILLA_IMAGELIB_ORIENTEDIMAGE_H_
#define MOZILLA_IMAGELIB_ORIENTEDIMAGE_H_

#include "ImageWrapper.h"
#include "Orientation.h"

namespace mozilla {
namespace image {

/**
 * An Image wrapper that rotates and/or flips an image according to a specified
 * Orientation.
 *
 * XXX(seth): There a known (performance, not correctness) issue with
 * GetImageContainer. See the comments for that method for more information.
 */
class OrientedImage : public ImageWrapper
{
public:
  NS_DECL_ISUPPORTS

  virtual ~OrientedImage() { }

  virtual nsIntRect FrameRect(uint32_t aWhichFrame) MOZ_OVERRIDE;

  NS_IMETHOD GetWidth(int32_t* aWidth) MOZ_OVERRIDE;
  NS_IMETHOD GetHeight(int32_t* aHeight) MOZ_OVERRIDE;
  NS_IMETHOD GetIntrinsicSize(nsSize* aSize) MOZ_OVERRIDE;
  NS_IMETHOD GetIntrinsicRatio(nsSize* aRatio) MOZ_OVERRIDE;
  NS_IMETHOD GetFrame(uint32_t aWhichFrame,
                      uint32_t aFlags,
                      gfxASurface** _retval) MOZ_OVERRIDE;
  NS_IMETHOD GetImageContainer(mozilla::layers::LayerManager* aManager,
                               mozilla::layers::ImageContainer** _retval) MOZ_OVERRIDE;
  NS_IMETHOD Draw(gfxContext* aContext,
                  GraphicsFilter aFilter,
                  const gfxMatrix& aUserSpaceToImageSpace,
                  const gfxRect& aFill,
                  const nsIntRect& aSubimage,
                  const nsIntSize& aViewportSize,
                  const SVGImageContext* aSVGContext,
                  uint32_t aWhichFrame,
                  uint32_t aFlags) MOZ_OVERRIDE;
 
protected:
  OrientedImage(Image* aImage, Orientation aOrientation)
    : ImageWrapper(aImage)
    , mOrientation(aOrientation)
  { }

  gfxMatrix OrientationMatrix(const nsIntSize& aViewportSize);

private:
  Orientation mOrientation;

  friend class ImageOps;
};

} // namespace image
} // namespace mozilla

#endif // MOZILLA_IMAGELIB_ORIENTEDIMAGE_H_