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; }
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