Fix ON_DEMAND_RENDER mode on Mac OSX....

plugin/mac/plugin_mac.mm

 /*
  * Copyright 2009, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 233 matching lines @@
       continue;
     }
 
     bool in_fullscreen = obj->GetFullscreenMacWindow();
 
     if (obj->drawing_model_ == NPDrawingModelCoreAnimation &&
         !in_fullscreen) {
       O3DLayer* o3dLayer = static_cast<O3DLayer*>(obj->gl_layer_);
       if (o3dLayer) {
         obj->client()->Tick();
-        [o3dLayer setNeedsDisplay];
+
+        if (obj->client()->NeedsRender()) {
+          [o3dLayer setNeedsDisplay];
+        }
       }
       continue;
     }
 
     ManageSafariTabSwitching(obj);
     obj->client()->Tick();
 
     // It's possible that event processing may have torn down the
     // full-screen window in the call above.
     in_fullscreen = obj->GetFullscreenMacWindow();
 
     if (in_fullscreen) {
       obj->GetFullscreenMacWindow()->IdleCallback();
     }
 
     // We're visible if (a) we are in fullscreen mode, (b) our cliprect
     // height and width are both a sensible size, ie > 1 pixel, or (c) if
     // we are rendering to render surfaces (CoreGraphics drawing model,
     // essentially offscreen rendering).
     //
     // We don't check for 0 as we have to size to 1 x 1 on occasion rather than
     // 0 x 0 to avoid crashing the Apple software renderer, but do not want to
     // actually draw to a 1 x 1 pixel area.
     bool plugin_visible = in_fullscreen ||
         (obj->last_buffer_rect_[2] > 1 && obj->last_buffer_rect_[3] > 1) ||
         obj->IsOffscreenRenderingEnabled();
 
     if (plugin_visible && obj->renderer()) {
-      if (obj->client()->NeedsContinuousRender() ||
-          obj->renderer()->need_to_render()) {
+      if (obj->client()->NeedsRender()) {
         // Force a sync to the VBL (once per timer callback)
         // to avoid tearing
         GLint sync = (i == 0);
         if (obj->mac_cgl_context_) {
           CGLSetParameter(obj->mac_cgl_context_, kCGLCPSwapInterval, &sync);
         } else if (obj->mac_agl_context_) {
           aglSetInteger(obj->mac_agl_context_, AGL_SWAP_INTERVAL, &sync);
         }
 
         if (obj->IsOffscreenRenderingEnabled()) {
@@ skipping 395 matching lines @@
 #ifdef RENDERER_GLES2
     ((o3d::RendererGLES2*) renderer_)->set_mac_cgl_context(context);
 #else
     ((o3d::RendererGL*) renderer_)->set_mac_cgl_context(context);
 #endif
   }
 }
 
 }  // namespace glue
 }  // namespace o3d