int main(int argc, char *argv[]) {
dpy = XOpenDisplay(NULL);
if(dpy == NULL) {
printf("cannot connect to X server\n\n");
return 0;
}
root = DefaultRootWindow(dpy);
vi = glXChooseVisual(dpy, 0, att);
if(vi == NULL) {
printf("no appropriate visual found\n\n");
return 0;
} else {
printf("visual %p selected\n", (void *)vi->visualid); /* %p creates hexadecimal output like in glxinfo */
}
cmap = XCreateColormap(dpy, root, vi->visual, AllocNone);
swa.colormap = cmap;
swa.event_mask = ExposureMask | KeyPressMask;
win = XCreateWindow(dpy, root, 0, 0, 600, 600, 0, vi->depth, InputOutput, vi->visual, CWColormap | CWEventMask, &swa);
XMapWindow(dpy, win);
XStoreName(dpy, win, "OpenGL Color Cube Example");
glc = glXCreateContext(dpy, vi, NULL, GL_TRUE);
glXMakeCurrent(dpy, win, glc);
glEnable(GL_DEPTH_TEST);
// Define "Close Window"
Atom WM_DELETE_WINDOW = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
XSetWMProtocols(dpy, win, &WM_DELETE_WINDOW, 1);
while(1) {
XNextEvent(dpy, &xev);
if(xev.type == Expose) {
XGetWindowAttributes(dpy, win, &gwa);
glViewport(0, 0, gwa.width, gwa.height);
DrawAQuad();
glXSwapBuffers(dpy, win);
} else if(xev.type == KeyPress || xev.type == ClientMessage) {
glXMakeCurrent(dpy, None, NULL);
glXDestroyContext(dpy, glc);
XDestroyWindow(dpy, win);
XCloseDisplay(dpy);
break;
}
}
return 0;
}
int main(int argc, char *argv[]) {
dpy = XOpenDisplay(NULL);
if(dpy == NULL) {
printf("\n\tcannot connect to X server\n\n");
exit(0);
}
root = DefaultRootWindow(dpy);
vi = glXChooseVisual(dpy, 0, att);
if(vi == NULL) {
printf("\n\tno appropriate visual found\n\n");
exit(0);
}
else {
printf("\n\tvisual %p selected\n", (void *)vi->visualid); /* %p creates hexadecimal output like in glxinfo */
}
cmap = XCreateColormap(dpy, root, vi->visual, AllocNone);
swa.colormap = cmap;
swa.event_mask = ExposureMask | KeyPressMask;
win = XCreateWindow(dpy, root, 0, 0, 600, 600, 0, vi->depth, InputOutput, vi->visual, CWColormap | CWEventMask, &swa);
XMapWindow(dpy, win);
XStoreName(dpy, win, "VERY SIMPLE APPLICATION");
glc = glXCreateContext(dpy, vi, NULL, GL_TRUE);
glXMakeCurrent(dpy, win, glc);
glEnable(GL_DEPTH_TEST);
while(1) {
XNextEvent(dpy, &xev);
if(xev.type == Expose) {
XGetWindowAttributes(dpy, win, &gwa);
glViewport(0, 0, gwa.width, gwa.height);
DrawAQuad();
glXSwapBuffers(dpy, win);
}
else if(xev.type == KeyPress) {
glXMakeCurrent(dpy, None, NULL);
glXDestroyContext(dpy, glc);
XDestroyWindow(dpy, win);
XCloseDisplay(dpy);
exit(0);
}
} /* this closes while(1) { */
} /* this is the } which closes int main(int argc, char *argv[]) { */
int main(int argc, char *argv[]) {
puts("Press any key to continue");
bytes_read = getline(&user_input, &nbytes, stdin);
dpy = XOpenDisplay(NULL);
if (dpy == NULL) {
printf("\n\tcannot connect to X server\n\n");
exit(0);
}
root = DefaultRootWindow(dpy);
vi = glXChooseVisual(dpy, 0, att);
if (vi == NULL) {
printf("\n\tno appropriate visual found\n\n");
exit(0);
} else {
printf("\n\tvisual %p selected\n", (void *) vi->visualid); /* %p creates hexadecimal output like in glxinfo */
}
CreateWindow(&cmap, &swa, &win, dpy, "First Window");
glc = glXCreateContext(dpy, vi, NULL, GL_TRUE);
glXMakeCurrent(dpy, win, glc);
printf("GL_VENDOR: %s\n", (char*)glGetString(GL_VENDOR));
printf("GL_RENDERER: %s\n", (char*)glGetString(GL_RENDERER));
printf("GL_VERSION: %s\n", (char*)glGetString(GL_VERSION));
printf("GL_SHADING_LANGUAGE_VERSION: %s\n", (char*)glGetString(GL_SHADING_LANGUAGE_VERSION));
printf("GL_EXTENSIONS: %s\n", (char*)glGetString(GL_SHADING_LANGUAGE_VERSION));
glEnable(GL_DEPTH_TEST);
while (1) {
XNextEvent(dpy, &xev);
if (xev.type == Expose) {
XGetWindowAttributes(dpy, win, &gwa);
glViewport(0, 0, gwa.width, gwa.height);
DrawAQuad();
glXSwapBuffers(dpy, win);
puts("Press Enter to finish");
bytes_read = getline(&user_input, &nbytes, stdin);
glXMakeCurrent(dpy, None, NULL);
glXDestroyContext(dpy, glc);
XDestroyWindow(dpy, win);
XCloseDisplay(dpy);
exit(0);
}
}
}
