regression in image downscaling
downscaling from 6400x3600 to 1280x720 gives strange artifacts at some edges
good appearance: pixman-0.38.4
bad appearance: pixman-0.40.0
source code for my bitmap downscaler:
both crosscompiled to windows 64bit exe from linux debian bullseye/sid (testing/unstable) using gcc:
$ x86_64-w64-mingw32-g++ --version
x86_64-w64-mingw32-g++ (GCC) 10-win32 20200525
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