https://bugs.documentfoundation.org/show_bug.cgi?id=151703

--- Comment #7 from Armin Le Grand <armin.le.gr...@me.com> ---
> @Armin, I don't want to dump this solely on Luboš's plate, but does this
> make any sense?

Comment 2 hints that it's Skia-related. I looked quickly on linux version where
I am more concerned that 'Quadratic' is not kept quadratic anymore in
slideshow, wrng as PageFill and ObjectFill (Hint to check gradients: Use a
StepWidth (e.g. 5) and slight rotation in the gradient definition to quickly
see problems).

Slideshow still transfers geometry info using Metafile (no primitives, see
GradientStyle::Linear in cppcanvas & similar), one root of problems.

It renders these with an own renderer impl, not using PrimitiveRenderes,
another root of problems. On Win this uses DirectX AFAIR - if that was not
changed, problem may be there. -> This speaks against Skia as reason, as long
as no one has implemented cppcanvas on skia

OTOH that it did change and worked before is a hint that someone changed
something in that processing chain somewhere. Since that chain is long and old
and converts gradient definition quite some times it would be necessary to
deep-dive and dig for the reason - if there is no obvious change in mentioned
areas. Maybe this can be bibisected somehow...?

Just my 2ct

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