CCEffectNode - Fix effect node resizing

Because content size changes are handled in render texture's visit method and because effect node overrides visit,
changes to effect node content size were not being applied.

Author: Thayer J Andrews

cocos2d-ui-tests/tests/CCEffectsTest.m

@@ -785,6 +785,60 @@ -(void)setupEffectNodeSizeTypeTest
     }
 }
 
+-(void)setupEffectNodeResizeTest
+{
+    NSArray *subTitles = @[
+                           @"Effect Node Resize Test\nSmall transparent blue node with grossini",
+                           @"Effect Node Resize Test\nMedium transparent blue node with grossini",
+                           @"Effect Node Resize Test\nBig transparent blue node with grossini"
+                           ];
+    
+    self.subTitle = subTitles[0];
+    
+    CCSprite *background = [CCSprite spriteWithImageNamed:@"Images/gridBackground.png"];
+    background.positionType = CCPositionTypeNormalized;
+    background.position = ccp(0.5f, 0.5f);
+    [self.contentNode addChild:background];
+    
+    CCEffectNode* effectNode = [[CCEffectNode alloc] init];
+    effectNode.clearFlags = GL_COLOR_BUFFER_BIT;
+    effectNode.clearColor = [CCColor colorWithRed:0.5f green:0.0f blue:0.0f alpha:0.5f];
+    effectNode.contentSizeType = CCSizeTypeNormalized;
+    effectNode.contentSize = CGSizeMake(0.25f, 0.25f);
+    effectNode.anchorPoint = ccp(0.5f, 0.5f);
+    effectNode.positionType = CCPositionTypeNormalized;
+    effectNode.position = ccp(0.5f, 0.5f);
+    
+    CCEffectHue *effect = [CCEffectHue effectWithHue:-120.0f];
+    effectNode.effect = effect;
+    
+    [self.contentNode addChild:effectNode];
+    
+    
+    CCSprite *sprite = [CCSprite spriteWithImageNamed:@"Images/grossini.png"];
+    sprite.anchorPoint = ccp(0.5, 0.5);
+    sprite.positionType = CCPositionTypeNormalized;
+    sprite.position = ccp(0.5f, 0.5f);
+    [effectNode addChild:sprite];
+    
+    
+    __weak CCEffectsTest *weakSelf = self;
+    __block NSUInteger callCount = 0;
+    CCActionCallBlock *blockAction = [CCActionCallBlock actionWithBlock:^{
+        callCount = (callCount + 1) % 3;
+        
+        float nodeSize = 0.25f + 0.25f * callCount;
+        effectNode.contentSize = CGSizeMake(nodeSize, nodeSize);
+        
+        weakSelf.subTitle = subTitles[callCount];
+    }];
+    [effectNode runAction:[CCActionRepeatForever actionWithAction:[CCActionSequence actions:
+                                                                   [CCActionDelay actionWithDuration:1.0f],
+                                                                   blockAction,
+                                                                   nil
+                                                                   ]]];
+}
+
 -(void)setupEffectNodeChildPositioningTest
 {
     self.subTitle = @"Effect Node Child Positioning Test\nBig transparent purple quad and small opaque green quad (both with grossini).\n";

cocos2d/CCEffectNode.m

@@ -122,6 +122,12 @@ -(void)visit:(CCRenderer *)renderer parentTransform:(const GLKMatrix4 *)parentTr
 	// override visit.
 	// Don't call visit on its children
 	if(!_visible) return;
+    
+    if(_contentSizeChanged)
+    {
+        [self destroy];
+        _contentSizeChanged = NO;
+    }
 
     GLKMatrix4 transform = [self transform:parentTransform];