43 lines
1.0 KiB
Lua
43 lines
1.0 KiB
Lua
local bitmap = require'bitmap' --used to read its content
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function int_hex(nb)
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if nb < 16 then add = "0"
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else add = "" end
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return [[\x]]..add..string.format("%x", nb)
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end
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io.write([[from draw import *
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]])
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do --open image
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local cairo = require'cairo' --used to open the file
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local image = cairo.load_png(arg[1])
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image_infos = {width = image:width(), height = image:height()}
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image_bitmap = image:bitmap()
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end
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local getpixel, setpixel = bitmap.pixel_interface(image_bitmap)
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pallet = {} --will store colors
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pallet_last = 0
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io.write("width=", image_infos.width, "\n", [[data=b"]])
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for j = 1, image_infos.height, 1 do
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for i = 1, image_infos.width, 1 do
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r, g, b = getpixel(i, j)
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if not pallet[r..","..g..","..b] then
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pallet[r..","..g..","..b] = pallet_last
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pallet_last = pallet_last + 1
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end
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io.write(int_hex(pallet[r..","..g..","..b]))
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end
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end
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--let's write the pallet
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io.write("\"\npallet=(")
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for i, _ in pairs(pallet) do
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io.write("(", i, "),")
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end
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io.write(")\ndraw(data,pallet,", image_infos.width, ")")
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