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/* -*- 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/. */
#include "nsISupports.idl"
interface nsIInputStream;
interface imgIContainer;
interface imgILoader;
interface imgICache;
interface nsIDOMDocument;
interface imgIScriptedNotificationObserver;
interface imgINotificationObserver;
[scriptable, builtinclass, uuid(4c2383a4-931c-484d-8c4a-973590f66e3f)]
interface imgITools : nsISupports
{
/**
* decodeImage
* Caller provides an input stream and mimetype. We read from the stream
* and decompress it (according to the specified mime type) and return
* the resulting imgIContainer.
*
* @param aStream
* An input stream for an encoded image file.
* @param aMimeType
* Type of image in the stream.
*/
imgIContainer decodeImage(in nsIInputStream aStream,
in ACString aMimeType);
/**
* decodeImageData
* Caller provides an input stream and mimetype. We read from the stream
* and decompress it (according to the specified mime type) and return
* the resulting imgIContainer.
*
* This method is deprecated and will be removed at some time in the future;
* new code should use |decodeImage|.
*
* @param aStream
* An input stream for an encoded image file.
* @param aMimeType
* Type of image in the stream.
* @param aContainer
* An imgIContainer holding the decoded image will be returned via
* this parameter. It is an error to provide any initial value but
* |null|.
*/
[deprecated] void decodeImageData(in nsIInputStream aStream,
in ACString aMimeType,
inout imgIContainer aContainer);
/**
* encodeImage
* Caller provides an image container, and the mime type it should be
* encoded to. We return an input stream for the encoded image data.
*
* @param aContainer
* An image container.
* @param aMimeType
* Type of encoded image desired (eg "image/png").
* @param outputOptions
* Encoder-specific output options.
*/
nsIInputStream encodeImage(in imgIContainer aContainer,
in ACString aMimeType,
[optional] in AString outputOptions);
/**
* encodeScaledImage
* Caller provides an image container, and the mime type it should be
* encoded to. We return an input stream for the encoded image data.
* The encoded image is scaled to the specified dimensions.
*
* @param aContainer
* An image container.
* @param aMimeType
* Type of encoded image desired (eg "image/png").
* @param aWidth, aHeight
* The size (in pixels) desired for the resulting image. Specify 0 to
* use the given image's width or height. Values must be >= 0.
* @param outputOptions
* Encoder-specific output options.
*/
nsIInputStream encodeScaledImage(in imgIContainer aContainer,
in ACString aMimeType,
in long aWidth,
in long aHeight,
[optional] in AString outputOptions);
/**
* getImgLoaderForDocument
* Retrieve an image loader that reflects the privacy status of the given
* document.
*
* @param doc
* A document. Must not be null.
*/
imgILoader getImgLoaderForDocument(in nsIDOMDocument doc);
/**
* getImgLoaderForDocument
* Retrieve an image cache that reflects the privacy status of the given
* document.
*
* @param doc
* A document. Null is allowed, but must _only_ be passed
* when there is no way to obtain a relevant document for
* the current context in which a cache is desired.
*/
imgICache getImgCacheForDocument(in nsIDOMDocument doc);
/**
* encodeCroppedImage
* Caller provides an image container, and the mime type it should be
* encoded to. We return an input stream for the encoded image data.
* The encoded image is cropped to the specified dimensions.
*
* The given offset and size must not exceed the image bounds.
*
* @param aContainer
* An image container.
* @param aMimeType
* Type of encoded image desired (eg "image/png").
* @param aOffsetX, aOffsetY
* The crop offset (in pixels). Values must be >= 0.
* @param aWidth, aHeight
* The size (in pixels) desired for the resulting image. Specify 0 to
* use the given image's width or height. Values must be >= 0.
* @param outputOptions
* Encoder-specific output options.
*/
nsIInputStream encodeCroppedImage(in imgIContainer aContainer,
in ACString aMimeType,
in long aOffsetX,
in long aOffsetY,
in long aWidth,
in long aHeight,
[optional] in AString outputOptions);
/**
* Create a wrapper around a scripted notification observer (ordinarily
* imgINotificationObserver cannot be implemented from scripts).
*
* @param aObserver The scripted observer to wrap
*/
imgINotificationObserver
createScriptedObserver(in imgIScriptedNotificationObserver aObserver);
};
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