CCRenderTexture and threads warning on OS X - macos

Question

I am getting this warning with Cocos2D 2.0 on OS X:
-[CCRenderTexture initWithWidth:height:pixelFormat:depthStencilFormat:] : cocos2d: WARNING. CCRenderTexture is running on its own thread. Make sure that an OpenGL context is being used on this thread!
Here's the code that I believe is causing the warning:
- (id) initWithObject: (CCNode *) object mask: (CCSprite *) mask {
NSAssert(object != nil, #"Invalid sprite for object");
NSAssert(mask != nil, #"Invalid sprite for mask");
if((self = [super init])) {
_objectSprite = object;
_maskSprite = mask;
// Set up the burn sprite that will "knock out" parts of the darkness layer depending on the alpha value of the pixels in the image.
[_maskSprite setBlendFunc: (ccBlendFunc) { GL_ZERO, GL_ONE_MINUS_SRC_ALPHA }];
// Get window size, we want masking over entire screen don't we?
CGSize size = [[CCDirector sharedDirector] winSize];
// Create point with middle of screen
CGPoint screenMid = ccp(size.width * 0.5f, size.height * 0.5f);
// Create the rendureTextures for the mask
_masked = [CCRenderTexture renderTextureWithWidth: size.width height: size.height];
[[_masked sprite] setBlendFunc: (ccBlendFunc) { GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA }];
// Set render textures at middle of screen
_masked.position = screenMid;
// Add the masked object to the screen
[self addChild: _masked];
[[CCDirector sharedDirector] setAlphaBlending:YES];
}
return self;
}
Please help, I just cannot figure this out.

Answer 1

In ccConfig.h, find a line that says
#define CC_DIRECTOR_MAC_THREAD CC_MAC_USE_DISPLAY_LINK_THREAD
This is where the use of threads is defined. You can try using the main thread option (CC_MAC_USE_MAIN_THREAD), or use GCD to make sure all code is actually executed on -[CCDirector runningThread]. This will pretty much fix it.