ogl.c


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/* gcc ogl.c -lGL -lX11 */
/* fd.o bugzilla #8443 */

#include <GL/glx.h>
int main()
{
	Display *gdi_display = XOpenDisplay(NULL);
	int screen = DefaultScreen(gdi_display);
	Window win = RootWindow(gdi_display, screen);
	Visual *visual;
	XVisualInfo template;
	XVisualInfo *vis;
	int num;

	GLXContext ctx = NULL;
	visual = DefaultVisual(gdi_display, screen);
	template.visualid = XVisualIDFromVisual(visual);
	vis = XGetVisualInfo(gdi_display, VisualIDMask, &template, &num);
	if (vis)
		ctx = glXCreateContext(gdi_display, vis, None, GL_TRUE);
	if (ctx)
		glXMakeCurrent(gdi_display, win, ctx);
	glXMakeCurrent(gdi_display, None, NULL);
	XCloseDisplay(gdi_display);
	return 0;
}