AW: What happens when enabling Hi-DPI scaling?

[Tiemo Hollmann TB]

Thanks Mark for jumping in!
If I understood you correct, things even get crisper and not blurred with
Hi-DPI enabled on a Hi-DPI monitor and keep as they are on a standard
monitor. So my conclusion would be to enable it always by standard (since it
is anyway standard on OS X)
What could be a reason not to enable Hi-DPI scaling on Windows or with other
words, why is it an option?
Thanks
Tiemo


-----Ursprüngliche Nachricht-----
Von: use-livecode [mailto:use-livecode-bounces at lists.runrev.com] Im Auftrag
von Mark Waddingham
Gesendet: Dienstag, 27. Oktober 2015 14:10
An: How to use LiveCode <use-livecode at lists.runrev.com>
Betreff: Re: What happens when enabling Hi-DPI scaling?

On 2015-10-26 10:52, Tiemo Hollmann TB wrote:
> I don't have a Hi-DPI monitor and didn't found anything in the forum 
> about it, so I am unsure what happens with my stack if I would enable 
> this setting? What exactly happens when it says "if enabled, the stack 
> will be scaled to fit"? A Hi-Res monitor has a higher pixel density, 
> but my program windows and objects have fixed sizes in pixel. My 
> understanding is, if I don't enable this setting, my stacks will be 
> displayed smaller on a Hi-DPI monitor? Correct? And enabling this 
> setting, are they scaled to the "same appearance", as on a standard 
> monitor? Or what happens? If yes, probably images get blurred, when 
> being scaled, so you shouldn't enable this option when you use images, 
> correct?

Hi-DPI scaling makes it so that if the systems 'pixel scale' (the mapping
from virtual pixels to physical pixels) is not 1-1, the engine will
appropriately render things to use the 'extra fidelity'.

A stack which is 400x400 in LiveCode, will still appear to be 400x400 on a
Retina display, say, except that it will actually be rendering at
800x800 - making things crisper.

Depending on the version of Windows you are targetting, you can experiment
with HiDPI by adjusting the 'text scaling' option in the system preferences.

> Why is the Hi-DPI support for Windows a chooseable option and for OS X 
> it is standard since 6.7.6 (6.7.7)? Do images don't get blurred, when 
> the stack is resized on OS X? Why can't I disable this option on OS X?

Windows does not allow the runtime configuration of Hi-DPI 'pixel scaling' -
it has to be specified as part of the Applications 'manifest' 
which is integrated at standalone build time.

Mac, however, does allow toggleing configuration of Hi-DPI 'pixel scaling'
at runtime - see the 'usePixelScaling' option.

By default, the Mac engine will use as many pixels as it can - so if you
have a retina display, you will get pixel scaling (but you can turn it off -
set the usePixelScaling to false).

On Windows, by default pixel scaling is turned off, but you can choose to
use it for your app by turning it on in the standalone builder.

Warmest Regards,

Mark.

--
Mark Waddingham ~ mark at livecode.com ~ http://www.livecode.com/
LiveCode: Everyone can create apps

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