<Swing Dev> [9] Review request for 8058742: Text size is twice bigger under GTK L&F on Gnome with HiDPI enabled

[Semyon Sadetsky]

On 8/22/2016 2:14 PM, Sergey Bylokhov wrote:
> On 22.08.16 10:56, Semyon Sadetsky wrote:
>>> But I don't suggest to use it as a global scale, use it only if other
>>> scales were not set(default transform is 1).
>> That also means that it will go to the global UI scale on Linuxes which
>> are not gnome/unity based. And the only difference with the current
>> solution that on such Linux DEs Java apps will receive some uncontrolled
>> scale because testing of unsupported OSes is out of the scope. If this
>> topic bothers you I suggest to create a separate bug to investigate how
>> the native scale may be supported on different Linux flavors using the
>> Xft.dpi env var.  Without that we may get complains that the scale
>> becomes wrong on unsupported Linuxes and DEs even when hidpi is not used
>> in the native desktop at all.
>
> I do not get it how it can affect the non-dpi systems, 
we are talking about the method that receive the desktop scale, right? 
That is how it affects the global device transform.
> since only in jdk9 on HiDPI screens default scale can have some 
> transform. The difference from the current solution is that the shared 
> code will used the public/shared java2d api, instead of platform 
> specific.
>
>>>>>>  - Take debug scale into account if it was set and skip all others.
>>>>>>  - Check J2D_UISCALE
>>>>>>  - Check scale-factor, text-scale-factor, text-scaling-factor.
>>>>>>  - Check Xft.dpi.
>>>>>>  - If non of them was set then scale=1 should be used.
>>>>>
>>>>
>>>
>>>
>>
>
>