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2 commits

Author SHA1 Message Date
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
Andreas Kling
69c33bd4ca LibGfx/OpenType: Load x-height metrics from OS/2 table if available
Before this change we always returned the font's point size as the
x-height which was basically never correct.

We now get it from the OS/2 table (if one with version >= 2 is available
in the file). Otherwise we fall back to using the ascent of the 'x'
glyph. Most fonts appear to have a sufficiently modern OS/2 table.
2023-06-10 21:46:33 +02:00