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/*
* i2v -- image-to-video.
* Convert an SGI image file to a format that is immediately usable
* by lrectwrite.
* The header of the file contains a description (in ASCII)
* padded to 8196 byte for fast access of the rest of the file.
*
* Based upon "showimg.c" by Paul Haeberli.
* --Guido van Rossum, CWI, Amsterdam
*/
#include <stdio.h>
#include <gl/gl.h>
#include <gl/device.h>
#include <gl/image.h>
unsigned short rs[8192];
unsigned short gs[8192];
unsigned short bs[8192];
IMAGE *image;
int xsize, ysize, zsize;
FILE *fp;
char header[100];
char *progname = "i2v";
main(argc,argv)
int argc;
char **argv;
{
int y;
if (argc > 0) progname = argv[0];
if( argc != 3 ) {
fprintf(stderr, "usage: %s infile outfile\n", progname);
exit(2);
}
if( (image=iopen(argv[1],"r")) == NULL ) {
fprintf(stderr, "%s: can't open input file %s\n",progname, argv[1]);
exit(1);
}
xsize = image->xsize;
ysize = image->ysize;
zsize = image->zsize;
if ((fp = fopen(argv[2], "w")) == NULL) {
fprintf(stderr,"%s: can't open output file %s\n", progname, argv[2]);
exit(1);
}
fprintf(fp, "CMIF video 1.0\n");
fprintf(fp, "(%d, %d, %d)\n", xsize, ysize, 0);
fprintf(fp, "0, %ld\n", (long)xsize * (long)ysize * sizeof(long));
fflush(fp);
for(y = 0; y < ysize; y++) {
if(zsize<3) {
getrow(image, rs, y, 0);
writepacked(xsize, rs, rs, rs);
} else {
getrow(image, rs, y, 0);
getrow(image, gs, y, 1);
getrow(image, bs, y, 2);
writepacked(xsize, rs, gs, bs);
}
}
exit(0);
}
writepacked(n, rsptr, gsptr, bsptr)
int n;
short *rsptr, *gsptr, *bsptr;
{
long parray[8192];
long *pptr = parray;
int i = n;
while (--i >= 0) {
*pptr++ = *rsptr++ | (*gsptr++<<8) | (*bsptr++<<16);
}
if (fwrite((char *) parray, sizeof(long), n, fp) != n) {
perror("fwrite");
exit(1);
}
}
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