Grab a 24-bit image off the StarterVideo
diff --git a/Demo/sgi/video/svgrab24.c b/Demo/sgi/video/svgrab24.c
new file mode 100755
index 0000000..3418b14
--- /dev/null
+++ b/Demo/sgi/video/svgrab24.c
@@ -0,0 +1,97 @@
+/*
+ * svgrab24 - Grab the current video input image into an rgb file.
+ *
+ * Jack Jansen, CWI, May 93.
+ *
+ * Adapted from grabone.c
+ */
+
+#ident "$Revision$"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <svideo.h>
+#include <gl/gl.h>
+#include <gl/device.h>
+#include <getopt.h>
+#include <image.h>
+
+main(int argc, char *argv[])
+{
+ SVhandle V;
+ svCaptureInfo ci;
+ boolean debug;
+ int ch, errflg;
+ int bufferSize;
+ long *buffer;
+ IMAGE *imgfile;
+ short *r, *g, *b;
+ int x, y;
+ char *ProgName = argv[0];
+
+ debug = FALSE;
+ ci.format = SV_RGB32_FRAMES;
+ ci.width = 0;
+ ci.height = 0;
+ ci.size = 1;
+
+ argv++; argc--;
+ if ( argc > 2 && strcmp(argv[0], "-w") == 0) {
+ ci.width = atoi(argv[1]);
+ argc -= 2;
+ argv += 2;
+ }
+ if ( argc != 1 ) {
+ fprintf(stderr, "Usage: %s [-w width] rgbfilename\n", ProgName);
+ exit(1);
+ }
+
+ /* Open video device */
+ if ((V = svOpenVideo()) == NULL) {
+ svPerror("open");
+ exit(1);
+ }
+
+ if (svQueryCaptureBufferSize(V, &ci, &bufferSize) < 0) {
+ svPerror("svQueryCaptureBufferSize");
+ exit(1);
+ }
+ buffer = malloc(bufferSize);
+
+ if (svCaptureOneFrame(V, ci.format, &ci.width, &ci.height, buffer) < 0) {
+ svPerror("svCaptureOneFrame");
+ exit(1);
+ }
+ if (debug) {
+ printf("captured size: %d by %d\n", ci.width, ci.height);
+ }
+
+ if ( (imgfile=iopen(argv[0], "w", RLE(1), 3, ci.width, ci.height, 3)) == 0) {
+ perror(argv[1]);
+ exit(1);
+ }
+ r = (short *)malloc(ci.width*sizeof(short));
+ g = (short *)malloc(ci.width*sizeof(short));
+ b = (short *)malloc(ci.width*sizeof(short));
+ if ( !r || !g || !b ) {
+ fprintf(stderr, "%s: malloc failed\n", ProgName);
+ exit(1);
+ }
+ for(y=0; y<ci.height; y++) {
+ for(x=0; x<ci.width; x++) {
+ unsigned long data = *buffer++;
+
+ r[x] = data & 0xff;
+ g[x] = (data>>8) & 0xff;
+ b[x] = (data>>16) & 0xff;
+ }
+ if ( putrow(imgfile, r, y, 0) == 0 ||
+ putrow(imgfile, g, y, 1) == 0 ||
+ putrow(imgfile, b, y, 2) == 0) {
+ fprintf(stderr, "%s: putrow failed\n", ProgName);
+ exit(1);
+ }
+ }
+ iclose(imgfile);
+ exit(0);
+}