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2 commits

Author SHA1 Message Date
Aliaksandr Kalenik
c431167736 LibWeb: Implement subtraction using saturated_addition in CSSPixels 
Fixes overflow bug found by UBSAN.
 2023-07-25 15:21:40 +02:00
Aliaksandr Kalenik
bec07d4af7 LibWeb: Use fixed-point saturated arithmetics for CSSPixels 
Using fixed-point saturated arithmetics for CSSPixels allows to avoid
accumulating floating-point errors.

This implementation is not complete yet: currently saturated
arithmetics implemented only for addition. But it is enough to not
regress any of layout tests we have :)

See https://github.com/SerenityOS/serenity/issues/18566
 2023-07-25 11:52:02 +02:00