cocos2dx 直接修改 Texture 里面的数据 mark一下 updateWithData

在原来的图片上增加了一个小黄块 

  // add "HelloWorld" splash screen"

    auto sprite = Sprite::create("HelloWorld.png");
    // position the sprite on the center of the screen
    sprite->setPosition(Vec2(visibleSize.width/2 + origin.x, visibleSize.height/2 + origin.y));
    // add the sprite as a child to this layer
    this->addChild(sprite, 0);
    for (int i = 0; i < 16 * 16; i++)    redTest[i] = 0xFF00FFFF;
    auto tex = sprite->getTexture();
    tex->updateWithData(redTest, 0, 0, 16, 16);