#!/usr/local/bin/ruby
#
# ./image_newfromgd.rb > image_newfromgd.gif

require "GD"

file = open("image_newfromgd.gd", "rb")
im = GD::Image.newFromGd(file)
file.close

# allocate some colors
white = im.colorAllocate(255,255,255)
black = im.colorAllocate(0,0,0)
red = im.colorAllocate(255,0,0)
green = im.colorAllocate(0,255,0)
blue = im.colorAllocate(0,0,255)
yellow = im.colorAllocate(255,250,205)

im.gif STDOUT