When reading BLP, do not trust JPEG decoder to determine image is CMYK #6767
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I tested the patch myself with each Python we deliver pillow for and the test suite is green again. Thanks! Out of curiosity, IIUIC, the fix is to tell libjpeg explicitly that the given image is "CMYK" as it no longer detects it itself (and Pillow does know that through other means)? |
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Yes, that's correct. |
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Resolves #6741
libjpeg 9e has decided to no longer detect the JPEG embedded within Tests/images/blp/blp1_jpeg.blp as being CMYK.
To allow our tests to still pass, if the BLP JPEG is in CMYK mode, this PR passes a value for
jpegmode, so that JpegDecode.c will override what libjpeg has detected.Testing in libjpeg 9d and 9e in my fork of pillow-wheels, the BLP tests fail without this, and pass with it.