Review Request 116567: Implement fuzzy image matching in readtest

[Alex Merry]

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https://git.reviewboard.kde.org/r/116567/
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Review request for KDE Frameworks.


Repository: kimageformats


Description
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Implement fuzzy image matching in readtest

Images are converted to ARGB32 format, then each byte (ie: each pixel
channel) in the read image is allowed to deviate by 1 from the
corresponding byte in the expected image, to allow for rounding errors
etc.

Extract QImage::Format parsing into its own header

Use the array-of-strings suggested by David Faure so that only one list
has to be maintained instead of three.


Diffs
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  autotests/readtest.cpp dec9686e38389b04296fdf176db9fb8c1f3a56a4 
  tests/format-enum.h PRE-CREATION 
  tests/imagedump.cpp 4b38c07d151d9bcb895f49a76e2bd03ddee41487 

Diff: https://git.reviewboard.kde.org/r/116567/diff/


Testing
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imagedump still works.  Most tests still pass; note that the non-alpha pic tests fail without https://git.reviewboard.kde.org/r/116568/diff/ as the wrong format (ARGB32 instead of RGB32) is constructed.

This should make the xcf tests pass again on Jenkins.


Thanks,

Alex Merry

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