Re: Writing an image format

[Luiz Henrique de Figueiredo <lhf@...>]

> I am looking for a simple way to generate and write a color image to disk.

The simplest format is the Netpbm family of formats:
	http://en.wikipedia.org/wiki/Netpbm_format

Easy to generate from Lua. Here's a Lua program for generating a gray-scale
picture of the Mandelbrot set (Mandelbrot died earlier this month).
--lhf

local N=256
print("P2\n",N,N,255)
for i=1,N do
	local y=2-4*(i-1)/(N-1)
	for j=1,N do
		local x=-2+4*(j-1)/(N-1)
		local xc,yc=x,y
		local X,Y=0,0
		local p=0
		for n=1,255 do
			X,Y = X^2-Y^2+xc, 2*X*Y+yc
			if X^2+Y^2>4 then p=n break end
		end
		print(p)
	end
end