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From: mae%vygr@Sun.COM (Mike Ekberg, Sun {Graphics Product Division})
Newsgroups: comp.graphics
Subject: Re: Sun rasterfiles.
Message-ID: <54042@sun.uucp>
Date: 20 May 88 22:01:16 GMT
References: <1051@luth.luth.se> <818@imagine.PAWL.RPI.EDU>
Sender: news@sun.uucp
Reply-To: mae@sun.UUCP (Mike Ekberg, Sun {Graphics Product Division})
Organization: Sun Microsystems, Mountain View
Lines: 61

Check out Pixrects manual, p 41. 

"...This support is implemented by passing raster files with
non-standard types through filters founbd in /usr/lib/rasfilters.
This directory also includes sample source code for a filter ..."

Also, here's a start:

/* dumprf.c - dump rasterfile formater */

#include <stdio.h>
#include <suntool/sunview.h>
#include <pixrect/pixrect.h>

FILE * fp;

main(argc, argv)
int argc;
char **argv;
{
  Pixrect *pr;
  struct rasterfile rh;
  colormap_t colormap;

  if( (fp = fopen(argv[1],"r")) == NULL) {
    perror(argv[1]);
    exit(-1);
  }

  if( pr_load_header(fp,&rh) == PIX_ERR) {
    perror("Header");
    exit(-1);
  }
  dump_rh(&rh);

  if( pr_load_colormap(fp,&rh,&colormap) == PIX_ERR) {
    perror("Colormap");
    exit(-1);
  }

  if( (pr = pr_load_image(fp,&rh,&colormap)) == NULL) {
    perror("Image");
    exit(-1);
  }
}

dump_rh(rh)			/* dump rasterefile header */
  struct rasterfile *rh;
{      
  printf("ras_magic = 0x%x.\n",rh->ras_magic);
  printf("ras_width = 0x%x.\n",rh->ras_width);
  printf("ras_height = 0x%x.\n",rh->ras_height);
  printf("ras_depth = 0x%x.\n",rh->ras_depth);
  printf("ras_length = 0x%x.\n",rh->ras_length);
  printf("ras_type = 0x%x.\n",rh->ras_type);
  printf("ras_maptype = 0x%x.\n",rh->ras_maptype);
  printf("ras_maplength = 0x%x.\n",rh->ras_maplength);
}

mike (sun!mae), M/S 5-40
"There's nothing human that's alien to us." - A. Einstein