[cairo-bugs] [Bug 84044] test/cairo-test-suite reports wrong max diff comparing different opaque images

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=84044

--- Comment #5 from Massimo <sixtysix at inwind.it> ---
(In reply to Uli Schlachter from comment #4)
> 
> I'd rather fix these problems in pdiff instead of somewhere in the code
> producing these images. In theory, these two code paths are independent from
> each other and pdiff could be used from something else than just the test
> suite.

Agreed, I opted to fix the producer because a failing test
compares an image with many references, but is produced
only once, so with many failures in the test-suite this
extra work is not repeated many times. 

OTOH to speed up the execution of the test suite probably it could be
possible to save with the reference also its md5sum, so that for
the exact comparison one computes the md5sum of the output and compares
it against many references with only one image loop.

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