Method pad

ij/src/main/java/ij/plugin/FFT.java:337–361

(ImageProcessor ip)

	}
	
	ImageProcessor pad(ImageProcessor ip) {
		originalWidth = ip.getWidth();
		originalHeight = ip.getHeight();
		int maxN = Math.max(originalWidth, originalHeight);
		int i = 2;
		while(i<maxN) i *= 2;
		if (i==maxN && originalWidth==originalHeight) {
			padded = false;
			return ip;
		}
		maxN = i;
		showStatus("Padding to "+ maxN + "x" + maxN);
		if (maxN>=65536) {
			IJ.error("FFT", "Padded image is too large ("+maxN+"x"+maxN+")");
			return null;
		}
		ImageStatistics stats = ImageStatistics.getStatistics(ip, MEAN, null);
		ImageProcessor ip2 = ip.createProcessor(maxN, maxN);
		ip2.setValue(stats.mean);
		ip2.fill();
		ip2.insert(ip, 0, 0);
		padded = true;
		Undo.reset();
		return ip2;
	}
	
	void showStatus(String msg) {
		if (stackSize>1)