src/apps/mplayerc/libpng.h

   1 /*
   2  *      Copyright (C) 2003-2006 Gabest
   3  *      http://www.gabest.org
   4  *
   5  *  This Program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2, or (at your option)
   8  *  any later version.
   9  *
  10  *  This Program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with GNU Make; see the file COPYING.  If not, write to
  17  *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  18  *  http://www.gnu.org/copyleft/gpl.html
  19  *
  20  */
  21
  22 #pragma once
  23
  24 struct png_t {unsigned char* data; unsigned int size, pos;};
  25
  26 #ifdef __cplusplus
  27
  28 extern "C" unsigned char* DecompressPNG(struct png_t* png, int* w, int* h);
  29
  30 #include <atlimage.h>
  31
  32 class CPngImage : public CImage
  33 {
  34 public:
  35         bool LoadFromResource(UINT id)
  36         {
  37                 bool ret = false;
  38
  39                 CStringA str;
  40                 if(LoadResource(id, str, _T("FILE")))
  41                 {
  42                         struct png_t png;
  43                         png.data = (unsigned char*)(LPCSTR)str;
  44                         png.size = str.GetLength();
  45                         int w, h;
  46                         if(BYTE* p = DecompressPNG(&png, &w, &h))
  47                         {
  48                                 if(Create(w, -h, 32))
  49                                 {
  50                                         for(int y = 0; y < h; y++)
  51                                                 memcpy(GetPixelAddress(0, y), &p[w*4*y], w*4);
  52                                         ret = true;
  53                                 }
  54
  55                                 free(p);
  56                         }
  57                 }
  58
  59                 return ret;
  60         }
  61 };
  62 #endif