Re: BadImplementation X Window System error with GTK+ 2.6.1

[Albert Chin <gtk-devel-list mlists thewrittenword com>]

On Tue, Jan 18, 2005 at 01:53:52PM +0800, James Henstridge wrote:
> Albert Chin wrote:
> 
> >Is it possible to query the RENDER extension to determine if it
> >supports the RenderTrapezoids request? I could then augment
> >_gdk_x11_have_render(). I haven't a clue about how to do this though.
> > 
> >
> You can query the XRENDER extension protocol version using the 
> XRenderQueryVersion() function.  From the Cairo source, it would appear 
> that the given protocol request was added in version 0.4:
> 
> #define CAIRO_SURFACE_RENDER_HAS_TRAPEZOIDS(surface) 
> CAIRO_SURFACE_RENDER_AT_LEAST((surface), 0, 4)
> 
> Also, remember that the availability of the CompositeTrapezoids will 
> differ from display to display, so a global 
> "has_xrender_composite_trapezoids" variable would not be appropriate 
> here (although you probably want to cache the result of 
> XRenderQueryVersion).

Isn't this an XFree86-specific solution though? Or do all vendors
(e.g. Sun) base their RENDER extension on Xrender from XFree86/xorg?

-- 
albert chin (china thewrittenword com)