ppm_util.hpp

The goal of this project is to explore the idea of point-based radiosity, which is a shooting radio

#if !defined(BRL_PPM_UTIL_HPP)
#define BRL_PPM_UTIL_HPP

#include <stdio.h> // for FILE type

/*+-----------------------------------------------------------------------------

  Ben Landon
  CSCI E-235

  Assignment 3 
  
  Read/write PPM files.

*/


/*+-----------------------------------------------------------------------------
  read_PPM_file

  Reads a named PPM file and returns the data, the width and the
  height.

*/
bool read_PPM_file (FILE* file, 
                    unsigned char** ppData, 
                    unsigned int* width, 
                    unsigned int* height,
                    unsigned int* colorDepth
                    );

/*+-----------------------------------------------------------------------------
  save_PPM_file

  Given a filename and the image parameters, writes our a type 6 
  PPM file.

*/
bool save_PPM_file (FILE* file,
                    unsigned char* pData,
                    unsigned int width,
                    unsigned int height,
                    unsigned int maxChannelValue
                    );


/*+-------------------------------------------------------------------
  
  flip_PPM_image
  
  PPM images are top down, and OpenGL images are bottom up.  For using
  PPM images as textures, it is sometimes useful to flip them.
  
  This function flips the PPM image, from top to bottom, in place. 
  
*/
void flip_PPM_image (unsigned char* pData,
		     unsigned int width, 
		     unsigned int height, 
		     unsigned int maxChannelValue);


#endif