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如何从图像数据创建的base64字符串编码的base64编码的base64字符串, 生病尝试这样的Cocos2D-X - 从图像数据精灵或纹理数据
CCRenderTexture* r = CCRenderTexture::create(sprite->getTexture()->getPixelsWide(), sprite->getTexture()->getPixelsHigh());
r->beginWithClear(1, 1, 1, 0);
sprite->visit();
r->end();
CCImage *img = r->newCCImage();
unsigned char *data = img->getData();
int len = img->getDataLen();
str = base64_encode(data, len);
return str;