gecko/modules/libpr0n/decoders/gif/nsGIFDecoder2.h

128 lines
4.1 KiB
C++

/* -*- 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):
* Chris Saari <saari@netscape.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either 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 ***** */
#ifndef _nsGIFDecoder2_h
#define _nsGIFDecoder2_h
#include "nsCOMPtr.h"
#include "imgIDecoder.h"
#include "imgIContainer.h"
#include "imgIDecoderObserver.h"
#include "gfxIImageFrame.h"
#include "GIF2.h"
#define NS_GIFDECODER2_CID \
{ /* 797bec5a-1dd2-11b2-a7f8-ca397e0179c4 */ \
0x797bec5a, \
0x1dd2, \
0x11b2, \
{0xa7, 0xf8, 0xca, 0x39, 0x7e, 0x01, 0x79, 0xc4} \
}
//////////////////////////////////////////////////////////////////////
// nsGIFDecoder2 Definition
class nsGIFDecoder2 : public imgIDecoder
{
public:
NS_DECL_ISUPPORTS
NS_DECL_IMGIDECODER
nsGIFDecoder2();
~nsGIFDecoder2();
nsresult ProcessData(unsigned char *data, PRUint32 count, PRUint32 *_retval);
NS_METHOD FlushImageData();
/* These functions will be called when the decoder has a decoded
* rows, frame size information, etc. */
static int BeginGIF(
void* aClientData,
PRUint32 aLogicalScreenWidth,
PRUint32 aLogicalScreenHeight,
PRUint8 aBackgroundRGBIndex);
static int EndGIF(
void* aClientData,
int aAnimationLoopCount);
static int BeginImageFrame(
void* aClientData,
PRUint32 aFrameNumber, /* Frame number, 1-n */
PRUint32 aFrameXOffset, /* X offset in logical screen */
PRUint32 aFrameYOffset, /* Y offset in logical screen */
PRUint32 aFrameWidth,
PRUint32 aFrameHeight);
static int EndImageFrame(
void* aClientData,
PRUint32 aFrameNumber,
PRUint32 aDelayTimeout);
static int HaveDecodedRow(
void* aClientData,
PRUint8* aRowBufPtr, /* Pointer to single scanline temporary buffer */
int aRow, /* Row number? */
int aDuplicateCount, /* Number of times to duplicate the row? */
int aInterlacePass);
private:
nsCOMPtr<imgIContainer> mImageContainer;
nsCOMPtr<gfxIImageFrame> mImageFrame;
nsCOMPtr<imgIDecoderObserver> mObserver; // this is just qi'd from mRequest for speed
PRInt32 mCurrentRow;
PRInt32 mLastFlushedRow;
gif_struct *mGIFStruct;
PRUint8 *mRGBLine;
PRUint32 mRGBLineMaxSize;
PRUint8 mBackgroundRGBIndex;
PRUint8 mCurrentPass;
PRUint8 mLastFlushedPass;
PRPackedBool mGIFOpen;
};
void nsGifShutdown();
#endif