Create GL Window

There is much line appendix!!
In it there is a shared library for work with X Window, this library creates a window in which are created a heap of affiliated windows on which different structures, and moving images with help Xvlibs are deduced, and is used XShm expansion
At attempt of creation of creation of a window for work with GL library by a call glXMakeCurrent (dpy, glwin, ctx);
There is an exclusive situation in internal function glXChannelRectSyncSGIX () SIGSEGV

Used: nVidia 8174 driver


 TInt scrnum;
 TUint mask;
 XSetWindowAttributes attr;
 Window root;
 Window glwin;
 GLXContext ctx;
 TInt attrib [] = {GLX_RGBA,
								 GLX_RED_SIZE, 1,
								 GLX_GREEN_SIZE, 1,
								 GLX_BLUE_SIZE, 1,
								 1, None};
 XVisualInfo* visinfo = NULL;
 GLint max [2] = {0, 0};
 visinfo = glXChooseVisual (dpy, NumberWorkScreen, attrib);

// visinfo = glXChooseVisual (dpy, scrnum, attrib);

 attr.background_pixel = 0;
 attr.border_pixel = 0;
 attr.colormap = // WorkScreenColormap;
		 XCreateColormap (dpy, Win_DC, visinfo-> visual, AllocNone);
 attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
 mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;

 int l = 0;
 int t = 0;
 int w = 200;
 int h = 200;

 glwin = 0;
 glwin = XCreateWindow (dpy, Win_DC,
										 0, visinfo-> depth,
										 InputOutput, visinfo-> visual,
										 mask, *attr);

// GLXContext ctx
ctx = glXCreateContext (dpy, visinfo, NULL, True);
if (! ctx)
return I_ERROR;
XFree (visinfo);
// dcv-> ctx = ctx;
XMapWindow (dpy, glwin);

 glXMakeCurrent (dpy, glwin, ctx);

// glXMakeContextCurrent (dpy, glwin, glwin, ctx);
glGetIntegerv (GL_MAX_VIEWPORT_DIMS, max);
/ **/
return I_OK;

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