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png.h

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00001 /* ScummVM - Graphic Adventure Engine
00002  *
00003  * ScummVM is the legal property of its developers, whose names
00004  * are too numerous to list here. Please refer to the COPYRIGHT
00005  * file distributed with this source distribution.
00006  *
00007  * This program is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU General Public License
00009  * as published by the Free Software Foundation; either version 2
00010  * of the License, or (at your option) any later version.
00011  *
00012  * This program is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  * GNU General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU General Public License
00018  * along with this program; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
00020  *
00021  */
00022 
00023 /*
00024  * PNG decoder used in engines:
00025  *  - sword25
00026  *  - wintermute
00027  * Dependencies:
00028  *  - libpng
00029  */
00030 
00031 #ifndef IMAGE_PNG_H
00032 #define IMAGE_PNG_H
00033 
00034 #include "common/scummsys.h"
00035 #include "common/textconsole.h"
00036 #include "image/image_decoder.h"
00037 
00038 namespace Common {
00039 class SeekableReadStream;
00040 class WriteStream;
00041 }
00042 
00043 namespace Graphics {
00044 struct Surface;
00045 }
00046 
00047 namespace Image {
00048 
00049 class PNGDecoder : public ImageDecoder {
00050 public:
00051     PNGDecoder();
00052     ~PNGDecoder();
00053 
00054     bool loadStream(Common::SeekableReadStream &stream);
00055     void destroy();
00056     const Graphics::Surface *getSurface() const { return _outputSurface; }
00057     const byte *getPalette() const { return _palette; }
00058     uint16 getPaletteColorCount() const { return _paletteColorCount; }
00059     void setSkipSignature(bool skip) { _skipSignature = skip; }
00060 private:
00061     byte *_palette;
00062     uint16 _paletteColorCount;
00063 
00064     // flag to skip the png signature check for headless png files
00065     bool _skipSignature;
00066 
00067     Graphics::Surface *_outputSurface;
00068 };
00069 
00076 bool writePNG(Common::WriteStream &out, const Graphics::Surface &input, const bool bottomUp = false);
00077 
00078 } // End of namespace Image
00079 
00080 #endif


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