[Nouveau] [Bug 90871] NV30: Xfwm4 use_compositing - garbled display

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #46 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to Hans de Goede from comment #44)
> Hi Ilia,
> 
> (In reply to Ilia Mirkin from comment #43)
> > Created attachment 118995 [details]
> > updated test program
> > 
> > With this I get the same results whether I set has_texture_rectangle = 1 or
> > 0. Attached the full updated source file, or use the patch below.
> 
> Thanks for the updated test program, this seems to fix things on nv3x. There
> still is an issue with then test program though (also reproduced on intel
> gfx) the program is supposed to change the color of the "box" when you click
> a mouse button (pressing a key exits the program), but currently when using
> rectangle textures it draws a red box on startup and then on a mouse click
> everything goes gray, where as the box should turn blue. As said this
> happens on intel gfx too, so I think there still is an issue with the test
> program when using rectangle textures.

Just my incompetence -- glMatrixMode has to go *before* glPushMatrix, not
after. Oops. Moving it up makes the program behave as expected, at least on
intel/hsw.

> 
> As for epoxy not seeing the extension, I believe that that is an epoxy
> issue, as said the extension is clearly listed in both glxinfo and glxgears
> -info output.

Pretty sure it's what I said -- the test program doesn't do a glXMakeCurrent
before calling gl functions, which means their output is invalid. Not an epoxy
issue. Rearranging the test program's code to fix this is annoying though.

I wonder if this is a real issue in xfwm code as well.

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