GUI: Fix hard shadow of tabs under HiDPI #4911
Merged
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Introduce
shadowIntensityto tab drawing functions.New implementation can behave slightly differently with old one under fractional scaling factors. E.g. when
scale=1.2 offset=2, the offset is rounded to2.4->2while scaling factor be1.2, only[offset/1.2]+1=2rectangles will be drawndrawSquareShadow()anddrawSquareShadowClip()are already self-contained under scaling and don't need to be changed.