Howto create a window with ARGB32-visual?

[Aaron Plattner]

On Fri, Sep 24, 2010 at 05:25:05AM -0700, Clemens Eisserer wrote:
> Hi,
> 
> I would like to create a Window with ARGB32-visual to reproduce a bug
> I experience
> with shaped ARGB32 windows when not using a composition manager,
> however I always get a BadMatch error.
> 
> My attemp tried to find a 32-bit visual, and pass that to XCreateWindow:
> 
> XVisualInfo info;
> int cnt;
> XVisualInfo *visInfos = XGetVisualInfo(display, 0, NULL, &cnt);
> 
> while(cnt-- > 0) {
>   if(visInfos[x].depth == 32) {
>        info = visInfos[x];
>    }
> }
> 
> XCreateWindow(display, root, 0, 0, 200, 200, 0, 32, InputOutput,
> info.visual,  0, NULL);
> 
> Any idea whats wrong here?

You need to create a colormap and I think also specify a border pixel value
and pass those in via the attribute structure parameter to XCreateWindow.

> Thank you in advance, Clemens