LCOV - code coverage report
Current view: directory - image/decoders - nsGIFDecoder2.h (source / functions) Found Hit Coverage
Test: app.info Lines: 1 1 100.0 %
Date: 2012-06-02 Functions: 1 1 100.0 %

       1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
       2                 :  *
       3                 :  * ***** BEGIN LICENSE BLOCK *****
       4                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       5                 :  *
       6                 :  * The contents of this file are subject to the Mozilla Public License Version
       7                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       8                 :  * the License. You may obtain a copy of the License at
       9                 :  * http://www.mozilla.org/MPL/
      10                 :  *
      11                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      12                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      13                 :  * for the specific language governing rights and limitations under the
      14                 :  * License.
      15                 :  *
      16                 :  * The Original Code is mozilla.org code.
      17                 :  *
      18                 :  * The Initial Developer of the Original Code is
      19                 :  * Netscape Communications Corporation.
      20                 :  * Portions created by the Initial Developer are Copyright (C) 2001
      21                 :  * the Initial Developer. All Rights Reserved.
      22                 :  *
      23                 :  * Contributor(s):
      24                 :  *   Chris Saari <saari@netscape.com>
      25                 :  *   Bobby Holley <bobbyholley@gmail.com>
      26                 :  *
      27                 :  * Alternatively, the contents of this file may be used under the terms of
      28                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      29                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      30                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      31                 :  * of those above. If you wish to allow use of your version of this file only
      32                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      33                 :  * use your version of this file under the terms of the MPL, indicate your
      34                 :  * decision by deleting the provisions above and replace them with the notice
      35                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      36                 :  * the provisions above, a recipient may use your version of this file under
      37                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      38                 :  *
      39                 :  * ***** END LICENSE BLOCK ***** */
      40                 : 
      41                 : #ifndef _nsGIFDecoder2_h
      42                 : #define _nsGIFDecoder2_h
      43                 : 
      44                 : #include "nsCOMPtr.h"
      45                 : #include "Decoder.h"
      46                 : #include "imgIDecoderObserver.h"
      47                 : 
      48                 : #include "GIF2.h"
      49                 : 
      50                 : namespace mozilla {
      51                 : namespace image {
      52                 : class RasterImage;
      53                 : 
      54                 : //////////////////////////////////////////////////////////////////////
      55                 : // nsGIFDecoder2 Definition
      56                 : 
      57                 : class nsGIFDecoder2 : public Decoder
      58                 : {
      59                 : public:
      60                 : 
      61                 :   nsGIFDecoder2(RasterImage &aImage, imgIDecoderObserver* aObserver);
      62                 :   ~nsGIFDecoder2();
      63                 : 
      64                 :   virtual void WriteInternal(const char* aBuffer, PRUint32 aCount);
      65                 :   virtual void FinishInternal();
      66                 :   virtual Telemetry::ID SpeedHistogram();
      67                 : 
      68                 : private:
      69                 :   /* These functions will be called when the decoder has a decoded row,
      70                 :    * frame size information, etc. */
      71                 : 
      72                 :   void      BeginGIF();
      73                 :   nsresult  BeginImageFrame(PRUint16 aDepth);
      74                 :   void      EndImageFrame();
      75                 :   void      FlushImageData();
      76                 :   void      FlushImageData(PRUint32 fromRow, PRUint32 rows);
      77                 : 
      78                 :   nsresult  GifWrite(const PRUint8 * buf, PRUint32 numbytes);
      79                 :   PRUint32  OutputRow();
      80                 :   bool      DoLzw(const PRUint8 *q);
      81                 : 
      82              11 :   inline int ClearCode() const { return 1 << mGIFStruct.datasize; }
      83                 : 
      84                 :   PRInt32 mCurrentRow;
      85                 :   PRInt32 mLastFlushedRow;
      86                 : 
      87                 :   PRUint8 *mImageData;       // Pointer to image data in either Cairo or 8bit format
      88                 :   PRUint32 *mColormap;       // Current colormap to be used in Cairo format
      89                 :   PRUint32 mColormapSize;
      90                 :   PRUint32 mOldColor;        // The old value of the transparent pixel
      91                 : 
      92                 :   // The frame number of the currently-decoding frame when we're in the middle
      93                 :   // of decoding it, and -1 otherwise.
      94                 :   PRInt32 mCurrentFrame;
      95                 : 
      96                 :   PRUint8 mCurrentPass;
      97                 :   PRUint8 mLastFlushedPass;
      98                 :   PRUint8 mColorMask;        // Apply this to the pixel to keep within colormap
      99                 :   bool mGIFOpen;
     100                 :   bool mSawTransparency;
     101                 : 
     102                 :   gif_struct mGIFStruct;
     103                 : };
     104                 : 
     105                 : } // namespace image
     106                 : } // namespace mozilla
     107                 : 
     108                 : #endif

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