Source:NetHack 3.4.3/include/bitmfile.h

Below is the full text to include/bitmfile.h from NetHack 3.4.3. To link to a particular line, write [[bitmfile.h#line123]], for example.

/****************************\
* Bitmap mit Farbtabelle als *
* Graphik-Datei speichern		 *
* Autor: Gabriel Schmidt		 *
* (c} 1992 by MAXON-Computer *
* -> Header-Datei						 *
\****************************/

#ifndef H_TO_FILE
#define H_TO_FILE

/*	#include <portab.h>	*/
#define UWORD unsigned short
#define ULONG unsigned long
#define UBYTE unsigned char

#define XIMG_MAGIC	0x58494D47


typedef enum { IMG, XIMG } FILE_TYP;

const char *get_file_ext(FILE_TYP typ);

struct RGB
	{
	UWORD r, g, b;
	};

int bitmap_to_file(FILE_TYP typ, int ww, int wh,
									 unsigned int pwx, unsigned int pwy,
									 unsigned int planes, unsigned int colors,
									 const char *filename,
									 void (*get_color) (unsigned int colind, struct RGB *rgb) ,
									 void (*get_pixel) (int x, int y, unsigned int *colind) ) ;

#endif