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 ?
--
Regards,
Alexei Babich, circuit engineer, OOO NPP "Rezonans", Chelyabinsk, Russia
http://www.rez.ru
Jabber ID: [email protected]
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