text: //Copyright (C) 2011 by Ivan Fratric
  //
  //Permission is hereby granted, free of charge, to any person obtaining a copy
  //of this software and associated documentation files (the "Software"), to deal
  //in the Software without restriction, including without limitation the rights
  //to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  //copies of the Software, and to permit persons to whom the Software is
  //furnished to do so, subject to the following conditions:
  //
  //The above copyright notice and this permission notice shall be included in
  //all copies or substantial portions of the Software.
  //
  //THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  //IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  //FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  //AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  //LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  //OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  //THE SOFTWARE.
  
  
  #pragma once
  
  #define IMGTYPE_RAW 0
  #define IMGTYPE_BMP 1
  #define IMGTYPE_PPM 2
  #define IMGTYPE_PGM 3
  #define IMGTYPE_UNSUPPORTED 999
  
  namespace LibSubspace {
  
  //handles basic image file input/output
  //only supports uncompressed image formats
  class ImageIO
  {
  protected:
  	//gets the file extension of file filename
  	char *GetFileExtension(char *filename);
  
  	//determines the imege format from the filename
  	int GetImageType(char *filename);
  
  public:
  
  	//loads the image from filename into image
  	//automatically determines the image format
  	void LoadImage(char *filename, Image *image);
  
  	//loads the image of the specified format (imageType) from filename into image
  	void LoadImage(char *filename, Image *image, int imageType);
  	
  	//saves the image into file named 'filename'
  	//automatically determines the image format
  	void SaveImage(char *filename, Image *image);
  
  	//saves the image into file named 'filename', using the format given as imageType
  	void SaveImage(char *filename, Image *image, int imageType);
  
  	//loads the uncompressed BMP image from filename into image
  	void LoadImageBMP(char *filename, Image *image);
  	//saves the image into file named 'filename' in uncompressed BMP format
  	void SaveImageBMP(char *filename, Image *image);
  
  	//loads the PPM image from filename into image
  	void LoadImagePPM(char *filename, Image *image);
  	//saves the image into file named 'filename' in PPM format
  	void SaveImagePPM(char *filename, Image *image);
  
  	//loads the PGM image from filename into image
  	void LoadImagePGM(char *filename, Image *image);
  	//saves the image into file named 'filename' in PGM format
  	void SaveImagePGM(char *filename, Image *image);
  
  	//loads the image from the file named 'filename'
  	//the file is assumed to be structured so that it only contains an array of raw (gray) pixel values
  	//as the file does not contain the image width and height, those are passed as parameters to the function
  	//if width and height are 0, the image is assumed to be square and the width and height are computed based on the file size
  	void LoadImageRAW(char *filename, Image *image, long width = 0, long height = 0);
  
  	//saves the image to a file named 'filename'
  	//only the array of raw (gray) pixel values is stored, without additional information such as image size
  	void SaveImageRAW(char *filename, Image *image);
  };
  
  } //namespace
  