[opensuse] glXChooseVisual can't select XVisualInfo struct on both 42.3 & 15?

3 Jul 2018

      All,

  Stray issue with initializing an openGL application. For some reason in both
42.3 and 15 glXChooseVisual will return NULL regardless of attributes used.
(even the defaults).

  If anyone has the glut and the openGL devel packages installed, I would like
to see if anyone can confirm this behavior. A simple init snippet in C that
will do it is:

#include <GL/glx.h>
#include <GL/gl.h>
#include <GL/glu.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <stdio.h>
#include <stdlib.h>

int main (void)
{
    Display *dpy;
    static int attributes[] = {GLX_DEPTH_SIZE, 16, GLX_DOUBLEBUFFER, None};
    XVisualInfo    *vi;
    int             errbase,
                    eventbase;

    dpy = XOpenDisplay(NULL);
    if (dpy == NULL) {
        fprintf (stderr, "XOpenDisplay: could not open display\n");
        exit (EXIT_FAILURE);
    }

    if (!glXQueryExtension (dpy, &errbase, &eventbase)){
        fprintf (stderr, "glXQueryExtension: no glx extension");
        exit (EXIT_FAILURE);
    }

    /* glXChooseVisual returns NULL on 42.3 & 15 regardless of
     * attributes specified.
     */
    vi = glXChooseVisual (dpy, DefaultScreen(dpy), attributes);
    if (vi == NULL) {
        fprintf (stderr, "glXChooseVisual: could not get visual\n");
        exit (EXIT_FAILURE);
    }

    return 0;
}

Compile with:

gcc -Wall -Wextra -pedantic -Wshadow -std=gnu11 -Ofast -lGL -lGLU -lX11 -o
glXChooseVisual_test glXChooseVisual_test.c -lglut

Bug opened: https://bugzilla.opensuse.org/show_bug.cgi?id=1099913

-- 
David C. Rankin, J.D.,P.E.

-- 
To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org
To contact the owner, e-mail: opensuse+owner@opensuse.org