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Enable writing I;16B images as PNG #7301
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I've created PR #7302 to resolve this. |
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Yes, I always thought so as well. However, if you check the unpack function for Pillow/src/libImaging/Unpack.c Lines 1152 to 1160 in 3c5324b
So I am not sure if |
While investigating an ImageIO issue concerning behavior on big-endian architectures I've noticed that pillow's PNG plugin currently doesn't allow writing 16-bit big-endian images to PNG.
I;16
is already supported, so I was wondering if it would be possible to addI;16B
as well.From what I can see, the only change needed to support this would be to add the line
"I;16B": ("I;16B", b"\x10\x00"),
to this dict:Pillow/src/PIL/PngImagePlugin.py
Lines 1035 to 1051 in 3c5324b
With this change we would be able to do 16 bit round-trips on big-endian, i.e., we can decode the pixel data directly into a 16 bit big-endian buffer and then use that same buffer when encoding as PNG. This would improve performance and streamline working with native encoding on big-endian machines.
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