https://bugs.documentfoundation.org/show_bug.cgi?id=156629

--- Comment #10 from Patrick Luby <[email protected]> ---
(In reply to Noel Grandin from comment #9)
> (In reply to Patrick Luby from comment #8)
> > Are you not seeing this behavior on Windows or Linux with Skia/Vulcan?
> 
> I do not see rendering artifacts on Windows, cannot test Linux.
> 
> > Also,
> > are you not seeing
> > https://bugs.documentfoundation.org/show_bug.cgi?id=156630#c15?
> 
> On Windows, I see rendering artifacts near the tail.

I now think that this is a macOS-only bug. If the bug was occurring on Windows,
you would see the 2x scale gray outline of the elephant in the bottom half of
the animated image like in
https://bugs.documentfoundation.org/attachment.cgi?id=188832.

I forced the native and Skia window scale to always be 1.0f in
getWindowScaling() in vcl/skia/osx/gdiimpl.cxx and this Skia/Raster scaling
behavior no longer occurs for this bug or for
https://bugs.documentfoundation.org/show_bug.cgi?id=156630 so I suspect that
Skia's window scale is diverging from the native window scale.

I'll investigate that and submit a separate Gerrit change when I have a fix.

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