gecko-dev/image/ImageFactory.h
Eric Rahm a33f11e0f5 Bug 1391803 - Use nsStringFwd.h for forward declaring string classes. r=froydnj
We should not be declaring forward declarations for nsString classes directly,
instead we should use nsStringFwd.h. This will make changing the underlying
types easier.

--HG--
extra : rebase_source : b2c7554e8632f078167ff2f609392e63a136c299
2017-08-16 16:48:52 -07:00

97 lines
3.3 KiB
C++

/* -*- 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