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Cocos-2dx精灵部分变灰,
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CCSprite* CCSpotLight::makeSpiteGray(CCSprite* changeSprite)
{
CCRenderTexture *render = CCRenderTexture::create(changeSprite->getContentSize().width,changeSprite->getContentSize().height,kCCTexture2DPixelFormat_RGBA8888);
render->beginWithClear(0.0f,0.0f,0.0f);
changeSprite->visit();
render->end();
//CCDirector::getInstance()->getRenderer()->render();
CCImage *finalImage = render->newCCImage();
unsigned char *pData = finalImage->getData();
int iIndex = 0;
for (int i = 0; i < finalImage->getHeight(); i ++)
{
if (i >= 100 && i < 200)
continue;
for (int j = 0; j < finalImage->getWidth(); j ++)
{
if (j >= 50 && j < 100)
continue;
// gray
int iBPos = iIndex;
unsigned int iB = pData[iIndex];
iIndex ++;
unsigned int iG = pData[iIndex];
iIndex ++;
unsigned int iR = pData[iIndex];
iIndex ++;
iIndex ++;
unsigned int iGray = 0.3 * iR + 0.6 * iG + 0.1 * iB;
pData[iBPos] = pData[iBPos + 1] = pData[iBPos + 2] = (unsigned char)iGray;
}
}
CCTexture2D *texture = new CCTexture2D;
texture->initWithImage(finalImage);
auto pSprite = CCSprite::createWithTexture(texture);
delete finalImage;
texture->release();
return pSprite;
}