static TFB_ColorMap *
clone_colormap (TFB_ColorMap *from, int index)
// returns an addrefed object
{
TFB_ColorMap *map;
map = alloc_colormap ();
if (!map)
{
log_add (log_Warning, "FATAL: clone_colormap(): "
"could not allocate a map");
exit (EXIT_FAILURE);
}
else
{ // fresh new map
map->index = index;
if (from)
map->version = from->version;
}
map->version++;
return map;
}
int main(int argc, char *argv[])
{
static int glAttribs[] = {
GLX_DOUBLEBUFFER,
GLX_RGBA,
GLX_DEPTH_SIZE, 1,
None
};
Display *dpy;
XVisualInfo *visInfo;
int scrn;
Window root;
Colormap cmap;
Window win;
XSetWindowAttributes winAttribs;
unsigned long winAttribsMask;
GLXContext glCtx;
int ignore;
const char *name = "OpenGL in a Shaped Window";
dpy = XOpenDisplay(NULL);
if (!dpy) {
fprintf(stderr, "Couldn't open default display\n");
return 1;
}
/* check that we can use the shape extension */
if (!XQueryExtension(dpy, "SHAPE", &ignore, &ignore, &ignore )) {
fprintf(stderr, "Display doesn't support shape extension\n");
return 1;
}
scrn = DefaultScreen(dpy);
root = RootWindow(dpy, scrn);
visInfo = glXChooseVisual(dpy, scrn, glAttribs);
if (!visInfo) {
fprintf(stderr, "Couldn't get RGB, DB, Z visual\n");
return 1;
}
glCtx = glXCreateContext(dpy, visInfo, 0, True);
if (!glCtx) {
fprintf(stderr, "Couldn't create GL context\n");
return 1;
}
cmap = alloc_colormap(dpy, root, visInfo->visual);
if (!cmap) {
fprintf(stderr, "Couln't create colormap\n");
return 1;
}
winAttribs.border_pixel = 0;
winAttribs.colormap = cmap;
winAttribs.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
winAttribsMask = CWBorderPixel | CWColormap | CWEventMask;
win = XCreateWindow(dpy, root, 0, 0, Width, Height, 0,
visInfo->depth, InputOutput,
visInfo->visual,
winAttribsMask, &winAttribs);
{
XSizeHints sizehints;
/*
sizehints.x = xpos;
sizehints.y = ypos;
sizehints.width = width;
sizehints.height = height;
*/
sizehints.flags = 0;
XSetNormalHints(dpy, win, &sizehints);
XSetStandardProperties(dpy, win, name, name,
None, (char **)NULL, 0, &sizehints);
}
XMapWindow(dpy, win);
glXMakeCurrent(dpy, win, glCtx);
printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
printf("Press ESC to exit.\n");
printf("Press up/down to change window shape.\n");
event_loop(dpy, win);
return 0;
}
