image/ImageFactory.h
author Kartikaya Gupta <kgupta@mozilla.com>
Thu, 15 Mar 2018 15:25:09 -0400
changeset 408344 a27ceb86fbd002b8aafd2f6377c315c11254af0c
parent 376425 397cfed5073f34740aed9e20460810316ee8ec25
child 421522 7597bbcc9d66111326aa69048ad5847bdc7497f2
permissions -rw-r--r--
Bug 1445662 - Remove ProcessTouchVelocity from PAPZCTreeManager.ipdl. r=rhunt This function is never actually called over IPDL. It is called directly on the concrete APZCTreeManager instance by the AndroidDynamicToolbarAnimator code, both of which live in the compositor. So we don't need to expose this method on IAPZCTreeManager or over PAPZCTreeManager.

/* -*- 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_ImageFactory_h
#define mozilla_image_ImageFactory_h

#include "nsCOMPtr.h"
#include "nsProxyRelease.h"
#include "nsStringFwd.h"

class nsIRequest;

namespace mozilla {
namespace image {

class Image;
class ImageURL;
class MultipartImage;
class ProgressTracker;

class ImageFactory
{
public:
  /**
   * Registers vars with Preferences. Should only be called on the main thread.
   */
  static void Initialize();

  /**
   * Creates a new image with the given properties.
   * Can be called on or off the main thread.
   *
   * @param aRequest         The associated request.
   * @param aProgressTracker A status tracker for the image to use.
   * @param aMimeType        The mimetype of the image.
   * @param aURI             The URI of the image.
   * @param aIsMultiPart     Whether the image is part of a multipart request.
   * @param aInnerWindowId   The window this image belongs to.
   */
  static already_AddRefed<Image> CreateImage(nsIRequest* aRequest,
                                             ProgressTracker* aProgressTracker,
                                             const nsCString& aMimeType,
                                             ImageURL* aURI,
                                             bool aIsMultiPart,
                                             uint32_t aInnerWindowId);
  /**
   * Creates a new image which isn't associated with a URI or loaded through
   * the usual image loading mechanism.
   *
   * @param aMimeType      The mimetype of the image.
   * @param aSizeHint      The length of the source data for the image.
   */
  static already_AddRefed<Image>
  CreateAnonymousImage(const nsCString& aMimeType, uint32_t aSizeHint = 0);

  /**
   * Creates a new multipart/x-mixed-replace image wrapper, and initializes it
   * with the first part. Subsequent parts should be passed to the existing
   * MultipartImage via MultipartImage::BeginTransitionToPart().
   *
   * @param aFirstPart       An image containing the first part of the multipart
   *                         stream.
   * @param aProgressTracker A progress tracker for the multipart image.
   */
  static already_AddRefed<MultipartImage>
  CreateMultipartImage(Image* aFirstPart, ProgressTracker* aProgressTracker);

private:
  // Factory functions that create specific types of image containers.
  static already_AddRefed<Image>
  CreateRasterImage(nsIRequest* aRequest,
                    ProgressTracker* aProgressTracker,
                    const nsCString& aMimeType,
                    ImageURL* aURI,
                    uint32_t aImageFlags,
                    uint32_t aInnerWindowId);

  static already_AddRefed<Image>
  CreateVectorImage(nsIRequest* aRequest,
                    ProgressTracker* aProgressTracker,
                    const nsCString& aMimeType,
                    ImageURL* aURI,
                    uint32_t aImageFlags,
                    uint32_t aInnerWindowId);

  // This is a static factory class, so disallow instantiation.
  virtual ~ImageFactory() = 0;
};

} // namespace image
} // namespace mozilla

#endif // mozilla_image_ImageFactory_h