// -----------------------------------------------------------------------------
// This file is part of Broken Sword 2.5
// Copyright (c) Malte Thiesen, Daniel Queteschiner and Michael Elsdörfer
//
// Broken Sword 2.5 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.
//
// Broken Sword 2.5 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 Broken Sword 2.5; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
// -----------------------------------------------------------------------------

/*
	BS_PNGLoader
	------------
	BS_ImageLoader-Klasse zum Laden von PNG-Dateien

	Autor: Malte Thiesen
*/

#ifndef SWORD25_PNGLOADER2_H
#define SWORD25_PNGLOADER2_H

// Includes
#include "sword25/kernel/common.h"
#include "sword25/gfx/image/imageloader.h"

// Klassendefinition
class BS_PNGLoader : public BS_ImageLoader
{
public:
	static BS_ImageLoader* CreateInstance() 
	{ 
		#include "sword25/kernel/memlog_off.h"
		return (BS_ImageLoader*) new BS_PNGLoader();
		#include "sword25/kernel/memlog_on.h"
	}

	// Alle virtuellen Methoden von BS_ImageLoader sind hier als static-Methode implementiert, damit sie von BS_B25SLoader aufgerufen werden können.
	// Die virtuellen Methoden rufen diese Methoden auf.
	static bool DoIsCorrectImageFormat(const char * FileDataPtr, unsigned int FileSize);
	static bool	DoDecodeImage(const char * FileDataPtr, unsigned int FileSize,  BS_GraphicEngine::COLOR_FORMATS ColorFormat, char * & UncompressedDataPtr,
							  int & Width, int & Height, int & Pitch);
	static bool DoImageProperties(const char * FileDataPtr, unsigned int FileSize, BS_GraphicEngine::COLOR_FORMATS & ColorFormat, int & Width, int & Height);

protected:
	BS_PNGLoader();
	bool DecodeImage(const char * pFileData, unsigned int FileSize, 
					 BS_GraphicEngine::COLOR_FORMATS ColorFormat,
					 char * & pUncompressedData,
					 int & Width, int & Height,
					 int & Pitch);
	bool IsCorrectImageFormat(const char * FileDataPtr, unsigned int FileSize);
	bool ImageProperties(const char * FileDatePtr, unsigned int FileSize, BS_GraphicEngine::COLOR_FORMATS & ColorFormat, int & Width, int & Height);
};

#endif