Fixed a threaded rendering issue and check the GL context when checking for errors.

Author: slembcke

cocos2d/CCConfiguration.m

@@ -131,8 +131,6 @@ -(id) init
 		}
 	}
 
-	CC_CHECK_GL_ERROR_DEBUG();
-
 	return self;
 }
 

cocos2d/CCRenderDispatch.m

@@ -46,7 +46,6 @@
 	dispatch_once(&once, ^{
 		CC_RENDER_DISPATCH_CONTEXT = [[EAGLContext alloc] initWithAPI:api sharegroup:sharegroup];
 
-		
 		CC_RENDER_DISPATCH_QUEUE = dispatch_queue_create("CCRenderQueue", DISPATCH_QUEUE_SERIAL);
 		CC_RENDER_DISPATCH_SEMAPHORE = dispatch_semaphore_create(CC_RENDER_DISPATCH_MAX_FRAMES);
 	});
@@ -72,7 +71,6 @@ static void CCRenderDispatchExecute(BOOL threadsafe, BOOL frame, dispatch_block_
 	});
 #else
 	block();
-	CC_CHECK_GL_ERROR_DEBUG();
 #endif
 }
 

cocos2d/CCRenderer_private.h

@@ -26,6 +26,7 @@
 #import <Foundation/Foundation.h>
 #import "CCRenderer.h"
 #import "CCCache.h"
+#import "CCRenderDispatch.h"
 
 // TODO These should be made private to the module.
 extern id CCBLENDMODE_CACHE;
@@ -155,7 +156,7 @@ CCGraphicsBufferPushElements(CCGraphicsBuffer *buffer, size_t requestedCount, CC
 	size_t capacity = buffer->_capacity;
 	if(required > capacity){
 		// Why 1.5? https://github.com/facebook/folly/blob/master/folly/docs/FBVector.md
-		[buffer resize:required*1.5];
+		CCRenderDispatch(NO, ^{[buffer resize:required*1.5];});
 	}
 
 	void *array = buffer->_ptr + buffer->_count*buffer->_elementSize;

cocos2d/Platforms/CCGL.h

@@ -53,6 +53,9 @@
 #define CC_CHECK_GL_ERROR_DEBUG() __CC_CHECK_GL_ERROR_DEBUG(__FUNCTION__, __LINE__)
 static inline void __CC_CHECK_GL_ERROR_DEBUG(const char *function, int line)
 {
+	#warning Should reenable this when the Metal renderer is complete enough.
+//	NSCAssert([EAGLContext currentContext], @"GL context is not set.");
+	
 	GLenum error;
 	while((error = glGetError())){
 		switch(error){