OAG Library (OpenGL) Part 2.3 - Drawing 2D Textures Using the Mouse and Programatically

#ifdef _WIN32
#ifdef _MSC_VER
#include "..\..\..\IOSystem\include\DefaultIOSystem.h"
#include "..\..\..\IOSystem\include\FileSystemFilter.h"
#include "..\..\include\Texture\OAGTextureLoader.h"
#include "..\..\include\BMP\BMPTexture.h"
#include "..\..\include\PCX\PCXTexture.h"
#include "..\..\include\JPG\JPGTexture.h"
#include "..\..\include\TGA\TGATexture.h"
#endif
#endif


oag::OAGTextureLoader::OAGTextureLoader(void)
{
}

oag::OAGTextureLoader::~OAGTextureLoader(void)
{
}


//Operations

oag::OAGTexture* oag::OAGTextureLoader::LoadTextureFromDisk(std::string strFileName)
{
	oag::OAGTexture* texture = NULL;

	DefaultIOSystem IOHandler;

	// First check if the file is accessable at all
	if( !IOHandler.Exists( strFileName.c_str() ) )
		return NULL;

	FileSystemFilter filter(strFileName, &IOHandler);

	std::string extension =  IOHandler.GetExtension( strFileName );

	if ( extension.compare("bmp") == 0 )
	{
		texture = new oag::OAGBMPTexture();
		texture->LoadTextureFromDisk(strFileName);
	}
	else if ( extension.compare("pcx") == 0  )
	{
		texture = new oag::OAGPCXTexture();
		texture->LoadTextureFromDisk(strFileName);
	}
	else if ( extension.compare("jpg") == 0  )
	{
		texture = new oag::OGAJPGTexture();
		texture->LoadTextureFromDisk(strFileName);
	}
	else if ( extension.compare("tga") == 0  )
	{
		texture = new oag::OAGTGATexture();
		texture->LoadTextureFromDisk(strFileName);
	}

	if ( texture )
	{
		texture->SetIOSystemFilter( filter.base, filter.filename);
	}

	return texture;
}