RosettaCodeData/Task/Bitmap-Write-a-PPM-file/Lua/bitmap-write-a-ppm-file-2.lua

14 lines
407 B
Lua

Bitmap.savePPM = function(self, filename)
local fp = io.open(filename, "wb")
if fp == nil then return false end
fp:write(string.format("P6\n%d %d\n%d\n", self.width, self.height, 255))
for y = 1, self.height do
for x = 1, self.width do
local pix = self.pixels[y][x]
fp:write(string.char(pix[1]), string.char(pix[2]), string.char(pix[3]))
end
end
fp:close()
return true
end