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jpeg.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 
00033 #ifndef IMAGE_JPEG_H
00034 #define IMAGE_JPEG_H
00035 
00036 #include "graphics/surface.h"
00037 #include "image/image_decoder.h"
00038 #include "image/codecs/codec.h"
00039 
00040 namespace Common {
00041 class SeekableReadStream;
00042 }
00043 
00044 namespace Image {
00045 
00046 class JPEGDecoder : public ImageDecoder, public Codec {
00047 public:
00048     JPEGDecoder();
00049     ~JPEGDecoder();
00050 
00051     // ImageDecoder API
00052     virtual void destroy();
00053     virtual bool loadStream(Common::SeekableReadStream &str);
00054     virtual const Graphics::Surface *getSurface() const;
00055 
00056     // Codec API
00057     const Graphics::Surface *decodeFrame(Common::SeekableReadStream &stream);
00058     Graphics::PixelFormat getPixelFormat() const;
00059 
00060     // Special API for JPEG
00061     enum ColorSpace {
00067         kColorSpaceRGB,
00068 
00082         kColorSpaceYUV
00083     };
00084 
00093     void setOutputColorSpace(ColorSpace outSpace) { _colorSpace = outSpace; }
00094 
00100     void setOutputPixelFormat(const Graphics::PixelFormat &format) { _requestedPixelFormat = format; }
00101 
00102 private:
00103     Graphics::Surface _surface;
00104     ColorSpace _colorSpace;
00105     Graphics::PixelFormat _requestedPixelFormat;
00106 
00107     Graphics::PixelFormat getByteOrderRgbPixelFormat() const;
00108 };
00109 
00110 } // End of namespace Image
00111 
00112 #endif


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