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move these out of header decoding

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Ryan Oldenburg 2023-06-12 07:56:26 -05:00
parent 1445558050
commit 35a8f6ec4e
1 changed files with 6 additions and 8 deletions
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14
src/pixie/fileformats/png.nim
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@ -76,14 +76,6 @@ proc decodeHeader(data: pointer): PngHeader =
if result.interlaceMethod notin [0.uint8, 1]: if result.interlaceMethod notin [0.uint8, 1]:
raise newException(PixieError, "Invalid PNG interlace method") raise newException(PixieError, "Invalid PNG interlace method")
# Not yet supported:
if result.bitDepth == 16:
raise newException(PixieError, "PNG 16 bit depth not supported yet")
if result.interlaceMethod != 0:
raise newException(PixieError, "Interlaced PNG not supported yet")
proc decodePalette(data: pointer, len: int): seq[ColorRGB] = proc decodePalette(data: pointer, len: int): seq[ColorRGB] =
if len == 0 or len mod 3 != 0: if len == 0 or len mod 3 != 0:
failInvalid() failInvalid()
@ -451,6 +443,12 @@ proc decodePng*(data: pointer, len: int): Png {.raises: [PixieError].} =
failCRC() failCRC()
inc(pos, 4) # CRC inc(pos, 4) # CRC
# Not yet supported:
if header.bitDepth == 16:
raise newException(PixieError, "PNG 16 bit depth not supported yet")
if header.interlaceMethod != 0:
raise newException(PixieError, "Interlaced PNG not supported yet")
while true: while true:
if pos + 8 > len: if pos + 8 > len:
failInvalid() failInvalid()