Alexei Babich <a.bab...@rez.ru> writes:
> Good afternoon.
>
> I tryed to deal with colormap, but probably I got wrong.
>
> Description: We have two visuals (as xdpyinfo says): default, 0x21
> (TrueColor, depth == 24 planes); 0x39 (TrueColor, depth == 32 planes)
>
> I tryed this:
>
> {
> Window win;
> Visual *argb_visual;
>
> { //search visual suitable for PictStandardARGB32
> //derived from xdpyinfo source
> XVisualInfo viproto; /* fill in for getting info */
> XVisualInfo *vip; /* returned info */
> int nvi = 0;
> viproto.depth = 32;
> vip = XGetVisualInfo (display, VisualDepthMask, &viproto,
> &nvi);
> if(nvi <1) {
> exit(EXIT_FAILURE);
> }
> if(nvi){
> argb_visual = vip->visual; //visual for
> 32-planes
> XFree(vip);
> }
> }
>
> // create window
> // default depth of root window is 24
>
> win = XCreateWindow(display, DefaultRootWindow(display),
> 20,30,20,30,0,32 /*depth*/,InputOutput,argb_visual,0,NULL);
> // when I try depth 24, creating window also fails.
> // This depth (32) and visual combinations look legal, because manual
> tells, that "For class InputOutput, the visual type and depth must be a
> combination supported for the screen, or a BadMatch error results".
> }
>
> Following your advice, I tryed colormap before creating window, like this:
> {
> Colormap cmap;
> //AllocNone is the only choice for visual type of TrueColor
> cmap = XCreateColormap(display, DefaultRootWindow(display),
> argb_visual,AllocNone);
> }
>
> But creating window still fails.
> I suppose I could get your letter wrong. If not, have you please other ideas
> how to create windows compatible with PictStandardARGB32 ?
Just to be sure: You did pass the colormap to the XCreateWindow call?
(Adding the colormap to the "attributes" parameter and setting the
CWColorMap bit in "valuemask")
eirik
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