xwininfo/xdpyinfo seems to confirm the red and blue channels are
reversed for GLX windows:
visual:
visual id: 0xb4
class: TrueColor
depth: 24 planes
available colormap entries: 256 per subfield
red, green, blue masks: 0xff0000, 0xff00, 0xff
significant bits in color specification: 8 bits
versus non-GLX windows:
visual:
visual id: 0x28
class: TrueColor
depth: 24 planes
available colormap entries: 256 per subfield
red, green, blue masks: 0xff, 0xff00, 0xff0000
significant bits in color specification: 8 bits
However the problem is not as simple as changing a pixel format. Xmir is
running in rooted mode, so we only get to choose one visual for the
whole display at start-up. So we need to find a way to force GLX to use
the correct visual, or to force XComposite to mix the colours correctly.
Because it's really out of Mir's control...
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which is subscribed to xorg-server in Ubuntu.
https://bugs.launchpad.net/bugs/1573470
Title:
BQ M10 tablet. Libreoffice Impress display wrong colors
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https://bugs.launchpad.net/canonical-devices-system-image/+bug/1573470/+subscriptions
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