将“Cocos2dx-截屏并设置图片尺寸 ”中cocos2d-x代码转换为2.2的代码

Cocos2dx-截屏并设置图片尺寸: http://www.cocos2dev.com/?p=522

2.2 代码如下：

void HelloWorld::screenShoot()

{

    CCSize winSize = CCDirector::sharedDirector()->getWinSize();

    CCRenderTexture *texture = CCRenderTexture::create(winSize.width/2, winSize.height/2, kCCTexture2DPixelFormat_RGBA8888);

    CCScene *curScene = CCDirector::sharedDirector()->getRunningScene();

    CCPoint point = curScene->getAnchorPoint();

    texture->begin();

    curScene->setScale(0.5f);

    curScene->setAnchorPoint(ccp(0, 0));

    curScene->visit();

    texture->end();

    texture->saveToFile("screenShoot.png", kCCImageFormatPNG);

    curScene->setScale(1.0f);

    curScene->setAnchorPoint(point);

//    CC_SAFE_DELETE(curScene);

}