зеркало из https://github.com/mozilla/gecko-dev.git
102 строки
4.1 KiB
Plaintext
102 строки
4.1 KiB
Plaintext
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsISupports.idl"
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interface nsIInputStream;
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interface imgIContainer;
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[scriptable, uuid(8e16f39e-7012-46bd-aa22-2a7a3265608f)]
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interface imgITools : nsISupports
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{
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/**
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* decodeImageData
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* Caller provides an input stream and mimetype. We read from the stream
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* and decompress it (according to the specified mime type) and return
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* the resulting imgIContainer. (If the caller already has a container,
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* it can be provided as input to be reused).
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*
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* @param aStream
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* An input stream for an encoded image file.
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* @param aMimeType
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* Type of image in the stream.
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* @param aContainer
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* An imgIContainer holding the decoded image. Specify |null| when
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* calling to have one created, otherwise specify a container to
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* be used. It is an error to pass an already-initialized container
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* as aContainer.
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*/
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void decodeImageData(in nsIInputStream aStream,
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in ACString aMimeType,
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inout imgIContainer aContainer);
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/**
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* encodeImage
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* Caller provides an image container, and the mime type it should be
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* encoded to. We return an input stream for the encoded image data.
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*
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* @param aContainer
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* An image container.
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* @param aMimeType
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* Type of encoded image desired (eg "image/png").
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* @param outputOptions
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* Encoder-specific output options.
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*/
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nsIInputStream encodeImage(in imgIContainer aContainer,
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in ACString aMimeType,
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[optional] in AString outputOptions);
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/**
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* encodeScaledImage
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* Caller provides an image container, and the mime type it should be
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* encoded to. We return an input stream for the encoded image data.
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* The encoded image is scaled to the specified dimensions.
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*
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* @param aContainer
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* An image container.
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* @param aMimeType
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* Type of encoded image desired (eg "image/png").
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* @param aWidth, aHeight
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* The size (in pixels) desired for the resulting image. Specify 0 to
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* use the given image's width or height. Values must be >= 0.
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* @param outputOptions
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* Encoder-specific output options.
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*/
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nsIInputStream encodeScaledImage(in imgIContainer aContainer,
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in ACString aMimeType,
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in long aWidth,
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in long aHeight,
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[optional] in AString outputOptions);
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/**
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* encodeCroppedImage
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* Caller provides an image container, and the mime type it should be
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* encoded to. We return an input stream for the encoded image data.
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* The encoded image is cropped to the specified dimensions.
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*
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* The given offset and size must not exceed the image bounds.
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*
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* @param aContainer
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* An image container.
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* @param aMimeType
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* Type of encoded image desired (eg "image/png").
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* @param aOffsetX, aOffsetY
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* The crop offset (in pixels). Values must be >= 0.
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* @param aWidth, aHeight
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* The size (in pixels) desired for the resulting image. Specify 0 to
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* use the given image's width or height. Values must be >= 0.
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* @param outputOptions
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* Encoder-specific output options.
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*/
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nsIInputStream encodeCroppedImage(in imgIContainer aContainer,
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in ACString aMimeType,
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in long aOffsetX,
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in long aOffsetY,
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in long aWidth,
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in long aHeight,
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[optional] in AString outputOptions);
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};
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