This class, designed for GD2+ effects numerous transformations on a target image and saves a compressed jpeg version on the server. It can easily handle proportional thumbnails with stacked transformations.
bevel - shaded bevelled edges (width,hex light colour,hex dark colour)
greyscale - black n white (ratio red,ratio green,ratio blue)
ellipse - carved ellipse (hex background colour)
round_edges - corner trimming (edge_radius,background colour,anti-alias)
merge - overlay merge image (image,x [neg = from right],y,opacity,transparent colour on merge image)
frame - plain raised border (hex light colour,hex dark colour,int width)
drop_shadow - [semi buggy] (width,hex shadow colour,hex background colour)
motion_blur - fading parallel lines (int # lines,hex background colour)
Multiple transformations can be stacked together with ease.