image/src/ImageOps.h
author Ehsan Akhgari <ehsan@mozilla.com>
Thu, 14 May 2015 14:16:51 -0400
changeset 264596 2ef80cf97822b7b4e475da1536b282971029c97a
parent 258511 7f2cb4c27f48b2afcdf78c711eb11eae36bf0db3
parent 264511 cafa8c19cc6336f05aa2d9b022e1f7cc627a862f
permissions -rw-r--r--
Merge central into inbound

/* -*- 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_image_src_ImageOps_h
#define mozilla_image_src_ImageOps_h

#include "nsCOMPtr.h"
#include "nsRect.h"

class gfxDrawable;
class imgIContainer;

namespace mozilla {
namespace image {

class Image;
struct Orientation;

class ImageOps
{
public:
  /**
   * Creates a version of an existing image which does not animate and is frozen
   * at the first frame.
   *
   * @param aImage         The existing image.
   */
  static already_AddRefed<Image> Freeze(Image* aImage);
  static already_AddRefed<imgIContainer> Freeze(imgIContainer* aImage);

  /**
   * Creates a clipped version of an existing image. Animation is unaffected.
   *
   * @param aImage         The existing image.
   * @param aClip          The rectangle to clip the image against.
   */
  static already_AddRefed<Image> Clip(Image* aImage, nsIntRect aClip);
  static already_AddRefed<imgIContainer> Clip(imgIContainer* aImage,
                                              nsIntRect aClip);

  /**
   * Creates a version of an existing image which is rotated and/or flipped to
   * the specified orientation.
   *
   * @param aImage         The existing image.
   * @param aOrientation   The desired orientation.
   */
  static already_AddRefed<Image> Orient(Image* aImage,
                                        Orientation aOrientation);
  static already_AddRefed<imgIContainer> Orient(imgIContainer* aImage,
                                                Orientation aOrientation);

  /**
   * Creates an image from a gfxDrawable.
   *
   * @param aDrawable      The gfxDrawable.
   */
  static already_AddRefed<imgIContainer>
  CreateFromDrawable(gfxDrawable* aDrawable);

private:
  // This is a static utility class, so disallow instantiation.
  virtual ~ImageOps() = 0;
};

} // namespace image
} // namespace mozilla

#endif // mozilla_image_src_ImageOps_h