Here is a strange behavior (easy to repro for those of you who might have a
copy of OIIO lying around):
# works
oiiotool --pattern checker 512x512 1 -d half -compression dwaa -tile 16 16
-o test.exr
# fails
oiiotool --pattern checker 512x512 1 -d half -compression dwaa -tile 8 8 -o
test.exr
Just writing a simple tiled 1-channel half exr file with dwaa (or dwab)
compression. It succeeds with 16x16 tiles but fails with 8x8, wherein
writeTiles() throws an exception with the following message:
> Failed to write pixel data to image file "test.bb700d14.temp.exr". Data
compression (zlib) failed.
Curiously, if I instead make a 3-channel file,
oiiotool --pattern checker 512x512 3 -d half -compression dwaa -tile 8 8 -o
test.exr
that succeeds (also fine with 4x4, 2x2, 1x1 tile size). Using zip compression
is fine. I can only make it fail with the specific combination of 1 channel
images + dwaa/dwab compression + tile size < 16.
Anybody have any insight, or has this bug been reported before?
Here's the OIIO issue if anyone wants to follow up there or reference it:
https://github.com/OpenImageIO/oiio/issues/1844
--
Larry Gritz
[email protected]
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