GD 1.2							utility program


Usage: webgif [-i y|n ] [-l] [-t index|off ] [-d] gifname.gif

  Where:

	-i controls interlace (specify y or n for yes or no).

	    y: gdImageInterlace(im, 1); /* Set interlace. */
	    n: gdImageInterlace(im, 0); /* Clear interlace. */

	-l outputs a table of color indexes.

	     : printf("%d	%d	%d	%d\n",
				j, 
				gdImageRed(im, j),
				gdImageGreen(im, j),
				gdImageBlue(im, j));

	-t sets the specified color index (0-255 or none) to be the
	  transparent color.

	     : gdImageColorTransparent(im, -1); /* -1 means not transparent. */

	-d reports the dimensions and other characteristics of the image.

	     : printf("Width: %d Height: %d Colors: %d\n",
				gdImageSX(im), gdImageSY(im),
				gdImageColorsTotal(im));
			t = gdImageGetTransparent(im);
			if (t != (-1)) {
				printf("Transparent index: %d\n", t);
			} else {
				/* -1 means the image is not transparent. */
				printf("Transparent index: none\n");
			}
			if (gdImageGetInterlaced(im)) {
				printf("Interlaced: yes\n");	
			} else {
				printf("Interlaced: no\n");	
			}

Note: you may wish to pipe to "more" when using the -l option.

GD 1.2							utility program