Drawing: Draw graphics and process images

This class can draw graphics and process images.

It can create an image and draw graphics on them like lines, arcs, ellipsis, rectangles, polygons, and text strings.

The class can also perform image manipulation operations like resize, crop, rotate, flip, remove borders, adjust brightness, colorize, add watermark, pixelate and render gradient areas.

The resulting image can be saved to a file in GIF, JPEG or PNG format or display the image dumping it as the current script output.