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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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Task/Bitmap/Lua/bitmap-4.lua Normal file
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local bitmap = Bitmap(32,32)
-- default pixel representation is 32-bit packed ARGB on [0,255]
bitmap:clear(0xFFFF0000) -- fill with red
bitmap:set(1, 1, 0xFF00FF00) -- one green pixel
bitmap:set(2, 2, 0xFF0000FF) -- one blue pixel
print(string.format("pixel at 0,0 = %x", bitmap:get(0,0)))
print(string.format("pixel at 1,1 = %x", bitmap:get(1,1)))
print(string.format("pixel at 2,2 = %x", bitmap:get(2,2)))
-- but note that pixel representation is agnostic..
-- (it's just a wrapper around a 2d-array of any valid type)
-- want to switch to RGB-tuple on [0,1]??
bitmap:clear({1,0,0}) -- fill with red
bitmap:set(1, 1, {0,1,0}) -- one green pixel
bitmap:set(2, 2, {0,0,1}) -- one blue pixel
print(string.format("pixel at 0,0 = %s", table.concat(bitmap:get(0,0),", ")))
print(string.format("pixel at 1,1 = %s", table.concat(bitmap:get(1,1),", ")))
print(string.format("pixel at 2,2 = %s", table.concat(bitmap:get(2,2),", ")))
-- or strings??
bitmap:clear("red") -- fill with red
bitmap:set(1, 1, "green") -- one green pixel
bitmap:set(2, 2, "blue") -- one blue pixel
print(string.format("pixel at 0,0 = %s", bitmap:get(0,0)))
print(string.format("pixel at 1,1 = %s", bitmap:get(1,1)))
print(string.format("pixel at 2,2 = %s", bitmap:get(2,2)))