ImagePng.h

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////////////////////////////////////////////////////////////////////////////////
//    Scorched3D (c) 2000-2009
//
//    This file is part of Scorched3D.
//
//    Scorched3D is free software; you can redistribute it and/or modify
//    it under the terms of the GNU General Public License as published by
//    the Free Software Foundation; either version 2 of the License, or
//    (at your option) any later version.
//
//    Scorched3D is distributed in the hope that it will be useful,
//    but WITHOUT ANY WARRANTY; without even the implied warranty of
//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//    GNU General Public License for more details.
//
//    You should have received a copy of the GNU General Public License
//    along with Scorched3D; if not, write to the Free Software
//    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
////////////////////////////////////////////////////////////////////////////////

#if !defined(AFX_ImagePng_H__315BF771_5E56_4C78_9D9F_51608D8CB3F0__INCLUDED_)
#define AFX_ImagePng_H__315BF771_5E56_4C78_9D9F_51608D8CB3F0__INCLUDED_

#include <image/Image.h>
#include <net/NetBuffer.h>

class ImagePng : public Image
{
public:
        ImagePng();
        ImagePng(int startWidth, int startHeight, bool alpha = false, unsigned char fill = 0);
        virtual ~ImagePng();

        virtual void removeOwnership() { owner_ = false; }
        virtual unsigned char *getBits() { return bits_; }
        virtual int getWidth() { return width_; }
        virtual int getHeight() { return height_; }
        virtual int getAlignment() { return 4; }
        virtual int getComponents() { return alpha_?4:3; }

        void clear();

        /**
        Overwrite the bitmap with the contents of the given file.
        If alpha is true then any black areas in the bitmap have full
        opacity.  When creating an alpha bitmap the bitmap is created
        in RGBA format, otherwise in RGB format.
        */
        bool loadFromFile(const std::string &filename, bool readalpha = false);
        bool loadFromFile(const std::string &filename, const std::string &alphafilename, bool invert);
        bool loadFromBuffer(NetBuffer &buffer, bool readalpha = false);

        bool writeToBuffer(NetBuffer &buffer);

protected:
        bool owner_;
        unsigned char *bits_;
        int width_;
        int height_;
        bool alpha_;

        void createBlankInternal(int width, int height, 
                bool alpha = false, unsigned char fill = 255);

private:
        ImagePng(ImagePng &other);
        ImagePng &operator=(ImagePng &other);
};

#endif // !defined(AFX_ImagePng_H__315BF771_5E56_4C78_9D9F_51608D8CB3F0__INCLUDED_)

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