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On martedì 8 novembre 2016 23:34:48 CET, Allan Sandfeld Jensen wrote:
On Tuesday 08 November 2016, Niccolò Belli wrote:
1) Always round down. With your current formula a 145ppi
screen gets scaled
by a 2x factor, while every other toolkit (GTK3 for example[3]) starts
scaling at 192ppi. This is also what people expect and it would return the
correct 2x scaling factor for my laptop. So the formula should be
scaling_factor=qRoundDown(yourDpi/96)
We have a two factor scaling system. We also scale by DPI. 144/2 == 72 for
instance, which happens to be the standard on Macs. Therefore
144DPI become a
normal 2x scaling of standard 72 Mac DPI.
And having 2x with smaller text, is a lot better than 1x with
large text on a
27" 4K desktop screen.
`Allan
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