Initial revision

Demo/sgi/video/Makefile

+all:	v2i i2v
+
+v2i:	v2i.o
+	$(CC) v2i.o -limage -o v2i
+
+i2v:	i2v.o
+	$(CC) i2v.o -limage -o i2v

Demo/sgi/video/i2v.c

+/*
+ * 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);
+	}
+}