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simpler

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This commit is contained in:
Ryan Oldenburg 2022-06-15 16:00:26 -05:00
parent 1493634920
commit 03c6ee1411
1 changed files with 2 additions and 2 deletions
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4
src/pixie/fileformats/png.nim
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@ -120,7 +120,7 @@ proc unfilter(
for x in 0 ..< rowBytes: for x in 0 ..< rowBytes:
var value = uncompressed.readUint8(uncompressedStartIdx + x) var value = uncompressed.readUint8(uncompressedStartIdx + x)
if x - bpp >= 0: if x - bpp >= 0:
value += result.readUint8(unfilteredStartIx + x - bpp) value += result[unfilteredStartIx + x - bpp]
result[unfilteredStartIx + x] = value result[unfilteredStartIx + x] = value
of 2: # Up of 2: # Up
let let
@ -129,7 +129,7 @@ proc unfilter(
for x in 0 ..< rowBytes: for x in 0 ..< rowBytes:
var value = uncompressed.readUint8(uncompressedStartIdx + x) var value = uncompressed.readUint8(uncompressedStartIdx + x)
if y - 1 >= 0: if y - 1 >= 0:
value += result.readUint8(unfilteredStartIx + x - rowBytes) value += result[unfilteredStartIx + x - rowBytes]
result[unfilteredStartIx + x] = value result[unfilteredStartIx + x] = value
of 3: # Average of 3: # Average
let let