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try both single and double-buffered visuals

This commit is contained in:
Brian Paul 2000-02-02 20:57:51 +00:00
parent 831f8ada7b
commit 8460cc9bf9
1 changed files with 21 additions and 9 deletions
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30
progs/xdemos/glxinfo.c
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@ -1,4 +1,4 @@
/* $Id: glxinfo.c,v 1.3 2000/01/27 16:53:55 brianp Exp $ */
/* $Id: glxinfo.c,v 1.4 2000/02/02 20:57:51 brianp Exp $ */
/*
* Copyright (C) 1999 Brian Paul All Rights Reserved.
@ -131,11 +131,20 @@ static void
print_screen_info(Display *dpy, int scrnum)
{
Window win;
int attrib[] = { GLX_RGBA,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
None };
int attribSingle[] = {
GLX_RGBA,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
None };
int attribDouble[] = {
GLX_RGBA,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
GLX_DOUBLEBUFFER,
None };
XSetWindowAttributes attr;
unsigned long mask;
Window root;
@ -145,10 +154,13 @@ print_screen_info(Display *dpy, int scrnum)
root = RootWindow(dpy, scrnum);
visinfo = glXChooseVisual(dpy, scrnum, attrib);
visinfo = glXChooseVisual(dpy, scrnum, attribSingle);
if (!visinfo) {
fprintf(stderr, "Error: couldn't find RGB GLX visual!\n");
return;
visinfo = glXChooseVisual(dpy, scrnum, attribDouble);
if (!visinfo) {
fprintf(stderr, "Error: couldn't find RGB GLX visual!\n");
return;
}
}
attr.background_pixel = 0;