aparler/RosettaCodeData
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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
199093 changed files with 3378972 additions and 0 deletions
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13
Task/Bitmap-Read-an-image-through-a-pipe/Lua/bitmap-read-an-image-through-a-pipe-1.lua Normal file
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function Bitmap:loadPPM(filename, fp)
if not fp then fp = io.open(filename, "rb") end
if not fp then return end
local head, width, height, depth, tail = fp:read("*line", "*number", "*number", "*number", "*line")
self.width, self.height = width, height
self:alloc()
for y = 1, self.height do
for x = 1, self.width do
self.pixels[y][x] = { string.byte(fp:read(1)), string.byte(fp:read(1)), string.byte(fp:read(1)) }
end
end
fp:close()
end

5
Task/Bitmap-Read-an-image-through-a-pipe/Lua/bitmap-read-an-image-through-a-pipe-2.lua Normal file
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local bitmap = Bitmap(0,0)
fp = io.popen("magick Lenna100.jpg ppm:-", "rb")
bitmap:loadPPM(nil, fp)
bitmap:savePPM("Lenna100.ppm") -- just as "proof"