gistfile1.c

+(CCRenderTexture*) createStroke: (CCLabelTTF*) label   size:(float)size   color:(ccColor3B)cor
{
	CCRenderTexture* rt = [CCRenderTexture renderTextureWithWidth:label.texture.contentSize.width+size*2  height:label.texture.contentSize.height+size*2];
	CGPoint originalPos = [label position];
	ccColor3B originalColor = [label color];
	BOOL originalVisibility = [label visible];
	[label setColor:cor];
	[label setVisible:YES];
	ccBlendFunc originalBlend = [label blendFunc];
	[label setBlendFunc:(ccBlendFunc) { GL_SRC_ALPHA, GL_ONE }];
	CGPoint bottomLeft = ccp(label.texture.contentSize.width * label.anchorPoint.x + size, label.texture.contentSize.height * label.anchorPoint.y + size);
	//CGPoint positionOffset = ccp(label.texture.contentSize.width * label.anchorPoint.x - label.texture.contentSize.width/2,label.texture.contentSize.height * label.anchorPoint.y - label.texture.contentSize.height/2);
    //use this for adding stoke to its self...
    CGPoint positionOffset= ccp(-label.contentSize.width/2,-label.contentSize.height/2);
    
	CGPoint position = ccpSub(originalPos, positionOffset);
    
	[rt begin];
	for (int i=0; i<360; i+=30) // you should optimize that for your needs
	{
		[label setPosition:ccp(bottomLeft.x + sin(CC_DEGREES_TO_RADIANS(i))*size, bottomLeft.y + cos(CC_DEGREES_TO_RADIANS(i))*size)];
		[label visit];
	}
	[rt end];
	[label setPosition:originalPos];
	[label setColor:originalColor];
	[label setBlendFunc:originalBlend];
	[label setVisible:originalVisibility];
	[rt setPosition:position];
	return rt;
}