| /* |
| * 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); |
| } |
| } |