On Fri, Sep 26, 2014 at 12:56:47PM +0100, Richard Hughes wrote:
(And I always thought that HiDPI is trying to keep the screen size of elements
You can either sacrifice quality or size; padding a 32px icon to 128px with a giant white border would keep the icon crisp and sharp, but scaling it up *4 would make it the right size, but with awful quality.
Actually scaling icon by integer factor should not have noticable impact on quality. It's just drawing 4 or 8 pixels instead of one. The icons you are talking about were not only scaled, but also blurred (filtered?). That's blurring which is degrading quality. First step to improvement would be to disable blurring. Using appropiate scaling algorithm (like 2xSai) would help even more.