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109 lines
3.6 KiB
C++
109 lines
3.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2001
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Chris Saari <saari@netscape.com>
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* Bobby Holley <bobbyholley@gmail.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef _nsGIFDecoder2_h
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#define _nsGIFDecoder2_h
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#include "nsCOMPtr.h"
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#include "Decoder.h"
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#include "imgIDecoderObserver.h"
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#include "GIF2.h"
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namespace mozilla {
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namespace image {
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class RasterImage;
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//////////////////////////////////////////////////////////////////////
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// nsGIFDecoder2 Definition
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class nsGIFDecoder2 : public Decoder
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{
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public:
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nsGIFDecoder2(RasterImage &aImage, imgIDecoderObserver* aObserver);
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~nsGIFDecoder2();
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virtual void WriteInternal(const char* aBuffer, PRUint32 aCount);
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virtual void FinishInternal();
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virtual Telemetry::ID SpeedHistogram();
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private:
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/* These functions will be called when the decoder has a decoded row,
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* frame size information, etc. */
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void BeginGIF();
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nsresult BeginImageFrame(PRUint16 aDepth);
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void EndImageFrame();
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void FlushImageData();
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void FlushImageData(PRUint32 fromRow, PRUint32 rows);
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nsresult GifWrite(const PRUint8 * buf, PRUint32 numbytes);
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PRUint32 OutputRow();
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bool DoLzw(const PRUint8 *q);
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inline int ClearCode() const { return 1 << mGIFStruct.datasize; }
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PRInt32 mCurrentRow;
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PRInt32 mLastFlushedRow;
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PRUint8 *mImageData; // Pointer to image data in either Cairo or 8bit format
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PRUint32 *mColormap; // Current colormap to be used in Cairo format
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PRUint32 mColormapSize;
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PRUint32 mOldColor; // The old value of the transparent pixel
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// The frame number of the currently-decoding frame when we're in the middle
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// of decoding it, and -1 otherwise.
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PRInt32 mCurrentFrame;
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PRUint8 mCurrentPass;
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PRUint8 mLastFlushedPass;
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PRUint8 mColorMask; // Apply this to the pixel to keep within colormap
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bool mGIFOpen;
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bool mSawTransparency;
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gif_struct mGIFStruct;
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};
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} // namespace image
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} // namespace mozilla
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#endif
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