gistfile1.txt

if (!is_Duplicate){
	if (!is_imageData) {
		image = im.getImageData(0, 0, im.canvas.width, im.canvas.height).data;
		if (!sizeSet) setSize(im.canvas.width, im.canvas.height);
	} else {
		image = im;
	}
	getImagePixels(); // convert to correct format if necessary
	analyzePixels(); // build color table & map pixels

	if (firstFrame) {
		writeLSD(); // logical screen descriptior
		writePalette(); // global color table
		if (repeat >= 0) {
			// use NS app extension to indicate reps
			writeNetscapeExt();
		}
	}
}