pixie/tests/fuzz_png.nim

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import pixie/common, pixie/fileformats/png, pngsuite, random, strformat
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randomize()
for i in 0 ..< 10_000:
let file = pngSuiteFiles[rand(pngSuiteFiles.len - 1)]
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var data = cast[seq[uint8]](
readFile(&"tests/images/png/pngsuite/{file}.png")
)
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let
pos = 29 + rand(data.len - 30)
value = rand(255).uint8
data[pos] = value
echo &"{i} {file} {pos} {value}"
try:
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let img = decodePng(data)
doAssert img.height > 0 and img.width > 0
except PixieError:
discard
data = data[0 ..< pos]
try:
let img = decodePng(data)
doAssert img.height > 0 and img.width > 0
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except PixieError:
discard