RetroZilla/gfx/idl/gfxIImageFrame.idl

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/** -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 2001
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Stuart Parmenter <pavlov@netscape.com>
* Chris Saari <saari@netscape.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsISupports.idl"
#include "gfxtypes.idl"
#include "gfxIFormats.idl"
%{C++
#include "nsRect.h"
%}
native nsRectRef(nsIntRect &);
/**
* gfxIImageFrame interface
*
* All x, y, width, height values are in pixels.
*
* @author Tim Rowley <tor@cs.brown.edu>
* @author Stuart Parmenter <pavlov@netscape.com>
* @version 0.1
*/
[scriptable, uuid(f6d00ee7-defc-4101-b2dc-e72cf4c37c3c)]
interface gfxIImageFrame : nsISupports
{
/**
* Create a new \a aWidth x \a aHeight sized image.
*
* @param aX The x-offset from the origin of the gfxIImageContainer parent.
* @param aY The y-offset from the origin of the gfxIImageContainer parent.
* @param aWidth The width of the image to create.
* @param aHeight The height of the image to create.
* @param aFormat the width of the image to create.
*
* @note The data of a new image is unspecified (Whats the word i'm looking for here?).
*/
void init(in PRInt32 aX,
in PRInt32 aY,
in PRInt32 aWidth,
in PRInt32 aHeight,
in gfx_format aFormat,
in gfx_depth aDepth);
/**
* TRUE by default. When set to FALSE, you will no longer be able to make any modifications
* to the data of the image. Any attempts will fail.
*/
attribute boolean mutable;
/**
* The x-offset of the image.
*/
readonly attribute PRInt32 x;
/**
* The y-offset of the image.
*/
readonly attribute PRInt32 y;
/**
* The width of the image.
*/
readonly attribute PRInt32 width;
/**
* The height of the image.
*/
readonly attribute PRInt32 height;
/**
* The rectangle this frame ocupies.
* @param rect this is really an out parameter.
*/
[noscript] void getRect(in nsRectRef rect);
/**
* The image data format the image was created with.
* @see gfxIFormats
*/
readonly attribute gfx_format format;
/**
* returns whether the image requires the background to be painted
*/
readonly attribute boolean needsBackground;
/* data accessors */
readonly attribute unsigned long imageBytesPerRow;
/**
* returns the number of bytes allocated for the image
*/
readonly attribute unsigned long imageDataLength;
// XXX do we copy here? lets not...
void getImageData([array, size_is(length)] out PRUint8 bits, out unsigned long length);
/**
* Sets \a length bytes of \a data in this object.
* @param offset The offset from the first pixel in bytes. To set
* data beginning with the first (top left) pixel in the image, \a offset
* should be 0; to set data beginning with, for example, the sixth pixel in
* the first row of a RGBA32 image, the offset should be 20.
* @attension should we use PRUint32 instead?
*/
void setImageData([array, size_is(length), const] in PRUint8 data,
in unsigned long length,
in long offset);
/**
* Lock image pixels before addressing the data directly
*/
void lockImageData();
/**
* Unlock image pixels
*/
void unlockImageData();
/* alpha stuff.. used for _A1 and _A8 formated images */
readonly attribute unsigned long alphaBytesPerRow;
/**
* returns the number of bytes allocated for the alpha mask
*/
readonly attribute unsigned long alphaDataLength;
// XXX do we copy here? lets not...
void getAlphaData([array, size_is(length)] out PRUint8 bits, out unsigned long length);
/**
* Sets \a length bytes of \a data in this object.
*/
void setAlphaData([array, size_is(length), const] in PRUint8 data,
in unsigned long length,
in long offset);
/**
* Lock alpha pixels before addressing the data directly
*/
void lockAlphaData();
/**
* Unlock alpha pixels
*/
void unlockAlphaData();
/* GIF Specific methods. These should be in a different class or interface. */
/**
* Blit this frame into another frame. Used for GIF animation compositing
*/
void drawTo(in gfxIImageFrame aDst,
in PRInt32 aDX,
in PRInt32 aDY,
in PRInt32 aDWidth,
in PRInt32 aDHeight);
/**
* Represents the number of milliseconds until the next frame should be displayed.
* @note -1 means that this frame should be displayed forever.
*/
attribute long timeout;
/* frame disposal method, used only by GIFs. Should probably subclass image frame
* and image container for GIFs special needs, but for simplicity it is here for the
* moment
*/
attribute long frameDisposalMethod;
/* frame background color
* GIF specific, should be in a GIF specific frame
*/
attribute gfx_color backgroundColor;
};