cocos2d-x纹理去色

//CCSprite转成CCimage

CCPoint p =
oldSprite->getAnchorPoint();

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

CCRenderTexture *outTexture
= CCRenderTexture::create((int)oldSprite->getContentSize().width,(int)oldSprite->getContentSize().height);

outTexture->begin();

oldSprite->visit();

outTexture->end();

oldSprite->setAnchorPoint(p);

CCImage* finalImage =
outTexture->newCCImage();

unsigned char *pData = finalImage->getData();

int iIndex = 0;

for (int i = 0; i < finalImage->getHeight(); i ++)

{

for (int j = 0; j < finalImage->getWidth(); j ++)

{

//
gray

int iBPos = iIndex;

unsigned int iB = pData[iIndex];

iIndex ++;

unsigned int iG = pData[iIndex];

iIndex ++;

unsigned int iR = pData[iIndex];

iIndex ++;

//unsigned int o = pData[iIndex];

iIndex ++; //原来的示例缺少

unsigned int iGray = 0.3 * iR + 0.4 * iG + 0.2 * iB;

pData[iBPos] =
pData[iBPos + 1] = pData[iBPos + 2] = (unsigned char)iGray;

}

}

CCTexture2D
*texture = newCCTexture2D;

texture->initWithImage(finalImage);

CCSprite* newSprite = CCSprite::createWithTexture(texture);

delete finalImage;

texture->release();

return newSprite;