언젠가는 게임개발자...

// Set the design resolution
glview->setDesignResolutionSize(designResolutionSize.width, designResolutionSize.height, ResolutionPolicy::SHOW_ALL);
Size frameSize = glview->getFrameSize();
// if the frame's height is larger than the height of medium size.
   if (frameSize.height > resolutionSize3.height)
   {        
       director->setContentScaleFactor(MIN(designResolutionSize.height / resolutionSize4.height, designResolutionSize.width / resolutionSize4.width));
   }
   // if the frame's height is larger than the height of small size.
   else if (frameSize.height > resolutionSize2.height)
   {        
       director->setContentScaleFactor(MIN(designResolutionSize.height/ resolutionSize3.height, designResolutionSize.width/resolutionSize3.width));
   }
else if (frameSize.height > resolutionSize1.height)
{
    director->setContentScaleFactor(MIN(designResolutionSize.height / resolutionSize2.height, designResolutionSize.width / resolutionSize2.width));
}
   // if the frame's height is smaller than the height of medium size.
   else
   {        
       director->setContentScaleFactor(MIN(designResolutionSize.height / resolutionSize1.height, designResolutionSize.width / resolutionSize1.width));
   }

이것 때문에 한참을 뻘짓하다가..(contentScaleFactor에 버그가 있는지, 1보다 큰 값을 넣어줘도 줄어들 때가 있는가 하면 작은 값을 넣어주면 원래 의도보다 너무 커지거나 하는 경우도 있다.)

얻은 해답은 위의 코드를 전부 삭제하는 것이다.

// Set the design resolution
glview->setDesignResolutionSize(designResolutionSize.width, designResolutionSize.height, ResolutionPolicy::SHOW_ALL);
Size frameSize = glview->getFrameSize();