Function draw_loop

demos/glthreadsint.c:261–327

* We have an instance of this for each thread. */

 * We have an instance of this for each thread.
 */
static void
draw_loop(struct winthread *wt)
{
   while (!ExitFlag) {

      pthread_mutex_lock(&wt->Ready);
      if (ExitFlag) break;

      LOCK(wt->Dpy);

      glXMakeCurrent(wt->Dpy, wt->Win, wt->Context);
      if (!wt->Initialized) {
         printf("glthreads: %d: GL_RENDERER = %s\n", wt->Index,
                (char *) glGetString(GL_RENDERER));
         if (Texture /*&& wt->Index == 0*/) {
            MakeNewTexture(wt);
         }
         wt->Initialized = GL_TRUE;
      }

      UNLOCK(wt->Dpy);

      glEnable(GL_DEPTH_TEST);

      if (wt->NewSize) {
         GLfloat w = (float) wt->WinWidth / (float) wt->WinHeight;
         glViewport(0, 0, wt->WinWidth, wt->WinHeight);
         glMatrixMode(GL_PROJECTION);
         glLoadIdentity();
         glFrustum(-w, w, -1.0, 1.0, 1.5, 10);
         glMatrixMode(GL_MODELVIEW);
         glLoadIdentity();
         glTranslatef(0, 0, -2.5);
         wt->NewSize = GL_FALSE;
      }

      if (wt->MakeNewTexture) {
         MakeNewTexture(wt);
         wt->MakeNewTexture = GL_FALSE;
      }

      glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

      glPushMatrix();
         glRotatef(wt->AngleY, 1, 0, 0);
         glRotatef(wt->AngleX, 0, 1, 0);
         glScalef(0.7, 0.7, 0.7);
         draw_object();
      glPopMatrix();

      LOCK(wt->Dpy);

      glXSwapBuffers(wt->Dpy, wt->Win);

      UNLOCK(wt->Dpy);

      if (Animate) {
         usleep(5000);