[Mesa-dev] [PATCH v3] dri3: For 1.2, use root window instead of pixmap drawable

[Eric Anholt]

Olivier Fourdan <ofourdan at redhat.com> writes:

> get_supported_modifiers() and pixmap_from_buffers() requests both
> expect a window as drawable, passing a pixmap will fail as the Xserver
> will fail to match the given drawable to a window.
>
> That leads to dri3_alloc_render_buffer() to return NULL and breaks
> rendering when using GLX_DOUBLEBUFFER on pixmaps.
>
> Query the root window of the pixmap on first init, and use the root
> window instead of the pixmap drawable for get_supported_modifiers()
> and pixmap_from_buffers().
>
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107117
> Fixes: 069fdd5 ("egl/x11: Support DRI3 v1.1")
> Signed-off-by: Olivier Fourdan <ofourdan at redhat.com>

Looks great!

Reviewed-by: Eric Anholt <eric at anholt.net>
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