I am trying to use the XeviGetVisualInfo library call, but I am getting strange
results. Could someone tell me if there are any known bugs for it? Am I just using
it wrong? See below for the example piece of code I am trying to use. I have tried
this (unsuccessfully) both on RH7.1 (FireGL3 video card) and RH7.2 (with a
Geforce256), both running XFree86 4.1.0 (I upgraded the RH7.1 from 4.0.3). When I run
the example, I get a valid n_info_return, but the array evi_return does not get
allocated properly and is returned with garbage.
I appreciate any help anyone can give me.
Thanks,
Mark
#include <X11/Intrinsic.h>
#include <iostream.h>
#include <X11/extensions/XEVI.h>
int main ( int argc, char **argv )
{
Widget parent;
XtAppContext app;
Display* disp;
parent = XtAppInitialize ( &app, "Test", NULL, 0,
&argc, argv, NULL, NULL, 0);
disp = XOpenDisplay(NULL);
if(XeviQueryExtension(disp))
{
ExtendedVisualInfo** evi_return;
int n_info_return = 0;
int stat = XeviGetVisualInfo(disp,
NULL,//return all visuals
0,
evi_return,
&n_info_return);
if (Success == stat)
{
cout << "n_info_return = " << n_info_return << endl;
int i;
for(i = 0; i < n_info_return; ++i)
{
cout << "Visual ID: " << evi_return[i]->core_visual_id
<< ", level " << evi_return[i]->level
<< ", min_hw_cmaps " << evi_return[i]->min_hw_colormaps
<< ", max_hw_cmaps " << evi_return[i]->max_hw_colormaps << endl;
}
XFree(evi_return);
}
}
else
{
cout << "Xevi extensions not available" << endl;
}
return 0;
}
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