LCOV - code coverage report
Current view: directory - image/decoders - nsPNGDecoder.h (source / functions) Found Hit Coverage
Test: app.info Lines: 5 0 0.0 %
Date: 2012-06-02 Functions: 1 0 0.0 %

       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                 :  *   Stuart Parmenter <pavlov@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 nsPNGDecoder_h__
      42                 : #define nsPNGDecoder_h__
      43                 : 
      44                 : #include "Decoder.h"
      45                 : 
      46                 : #include "imgIDecoderObserver.h"
      47                 : #include "gfxASurface.h"
      48                 : 
      49                 : #include "nsCOMPtr.h"
      50                 : 
      51                 : #include "png.h"
      52                 : 
      53                 : #include "qcms.h"
      54                 : 
      55                 : namespace mozilla {
      56                 : namespace image {
      57                 : class RasterImage;
      58                 : 
      59                 : class nsPNGDecoder : public Decoder
      60                 : {
      61                 : public:
      62                 :   nsPNGDecoder(RasterImage &aImage, imgIDecoderObserver* aObserver);
      63                 :   virtual ~nsPNGDecoder();
      64                 : 
      65                 :   virtual void InitInternal();
      66                 :   virtual void WriteInternal(const char* aBuffer, PRUint32 aCount);
      67                 :   virtual Telemetry::ID SpeedHistogram();
      68                 : 
      69                 :   void CreateFrame(png_uint_32 x_offset, png_uint_32 y_offset,
      70                 :                    PRInt32 width, PRInt32 height,
      71                 :                    gfxASurface::gfxImageFormat format);
      72                 :   void SetAnimFrameInfo();
      73                 : 
      74                 :   void EndImageFrame();
      75                 : 
      76                 :   // Check if PNG is valid ICO (32bpp RGBA)
      77                 :   // http://blogs.msdn.com/b/oldnewthing/archive/2010/10/22/10079192.aspx
      78               0 :   bool IsValidICO() const
      79                 :   {
      80                 :     png_uint_32
      81                 :         png_width,  // Unused
      82                 :         png_height; // Unused
      83                 : 
      84                 :     int png_bit_depth,
      85                 :         png_color_type;
      86                 : 
      87               0 :     if (png_get_IHDR(mPNG, mInfo, &png_width, &png_height, &png_bit_depth,
      88               0 :                      &png_color_type, NULL, NULL, NULL)) {
      89                 : 
      90                 :       return (png_color_type == PNG_COLOR_TYPE_RGB_ALPHA &&
      91               0 :               png_bit_depth == 8);
      92                 :     } else {
      93               0 :       return false;
      94                 :     }
      95                 :   }
      96                 : 
      97                 : public:
      98                 :   png_structp mPNG;
      99                 :   png_infop mInfo;
     100                 :   nsIntRect mFrameRect;
     101                 :   PRUint8 *mCMSLine;
     102                 :   PRUint8 *interlacebuf;
     103                 :   PRUint8 *mImageData;
     104                 :   qcms_profile *mInProfile;
     105                 :   qcms_transform *mTransform;
     106                 : 
     107                 :   gfxASurface::gfxImageFormat format;
     108                 : 
     109                 :   // For size decodes
     110                 :   PRUint8 *mHeaderBuf;
     111                 :   PRUint32 mHeaderBytesRead;
     112                 : 
     113                 :   PRUint8 mChannels;
     114                 :   bool mFrameHasNoAlpha;
     115                 :   bool mFrameIsHidden;
     116                 : 
     117                 :   // whether CMS or premultiplied alpha are forced off
     118                 :   PRUint32 mCMSMode;
     119                 :   bool mDisablePremultipliedAlpha;
     120                 :   
     121                 :   /*
     122                 :    * libpng callbacks
     123                 :    *
     124                 :    * We put these in the class so that they can access protected members.
     125                 :    */
     126                 :   static void PNGAPI info_callback(png_structp png_ptr, png_infop info_ptr);
     127                 :   static void PNGAPI row_callback(png_structp png_ptr, png_bytep new_row,
     128                 :                                   png_uint_32 row_num, int pass);
     129                 : #ifdef PNG_APNG_SUPPORTED
     130                 :   static void PNGAPI frame_info_callback(png_structp png_ptr,
     131                 :                                          png_uint_32 frame_num);
     132                 : #endif
     133                 :   static void PNGAPI end_callback(png_structp png_ptr, png_infop info_ptr);
     134                 :   static void PNGAPI error_callback(png_structp png_ptr,
     135                 :                                     png_const_charp error_msg);
     136                 :   static void PNGAPI warning_callback(png_structp png_ptr,
     137                 :                                       png_const_charp warning_msg);
     138                 : 
     139                 :   // This is defined in the PNG spec as an invariant. We use it to
     140                 :   // do manual validation without libpng.
     141                 :   static const PRUint8 pngSignatureBytes[];
     142                 : };
     143                 : 
     144                 : } // namespace image
     145                 : } // namespace mozilla
     146                 : 
     147                 : #endif // nsPNGDecoder_h__

Generated by: LCOV version 1.7