It's not that simple. Normally you render significantly upscaled stuff in an off-screen buffer and then downscale it for the best possible appearance for every

It's not that simple. Normally you render significantly upscaled stuff in an off-screen buffer and then downscale it for the best possible appearance for every single frame. There are some ratios you need to keep, or you'd end up with Linux-style graphics "quality" (try scaling factor other than 1.0). If you just scale icon/bitmap once without thinking about this, it would look most likely ugly after upscaling/downscaling steps (unless you got lucky).