Re: [B2-devel] GDK BadMatch error

[<gb...@di...>]

Hi,

> It seemed to happen exactly when Basilisk wanted to show the window, thus
> when it tried to write and discovered it isn't a DirectColor visual at
> all. (Below the "// Show window" comment in driver_xf86dga)

On my system, default visual is TrueColor (0x21) but DirectColor is
available. B2 first tries to get a DirectColor visual for gamma
correction. It then uses that visual, if available. Get rid of Gtk, and
you will get a more precise error from the X server.

> What I was thinking is, AFAIK, the new DGA 2.0 extension, included in XF86
> 4.0 and up, allows (unlike the old 1.0 version) depth and visual
> switching.

I believe the VidMode extension allows depth and resolution switching
even for DGA 1.

> Maybe the X server returned that the DirectColor visual is available and
> can be switched to, unlike the code, which seems to assume the current
> visual is DirectColor.

Where does the code make that assumption? The code actually does try a
DirectColor visual first. XMatchVisual() returned non-zero so that of
visual is available and will be used. Probably, some other bits
mismatch.

Bye,
Gwenole.