3d image rotating

Hello. I'm looking for way to rotate normal images, but not x/y, but with Z also. I get a source image (png, jpg, gif...) and I want to rotate it. assuming the "depth" of the image is 1 pixel for example... I'm looking for a way to do it without using imagemagick - only GD. I know it might be slower, but its need to run on a server without imagemagick. I've searched information about it, also in PEAR, but I couldn't find anything that takes a normal image and rotate it.. Thanks, Daniel -- Use ROT26 for best security