Font scaling continued

[S. Brett Sutton]

It also looks to me like we need to deal with the mouse cursor size on 
the same basis as the font size.


Having two radically different sized monitors results in two different 
sized cursors when what is really required is a consistent mouse cursor 
size.


The question is whether window scaling should affect the mouse cursor size.

This probably needs to be experimented with. In the end I think we will 
also need to allow the user to scale the mouse cursor on a per screen 
basis, but hopefully we can find a sensible set of defaults that mean 
most people won't need to play with the scaling.



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Re: Font scaling

[Ankit]

I'm experiencing the same. :(

 1. Even, cursor gets randomly scaled a lot.
 2. Known bug: arrangement of monitors does not persist.
 3. I can't get my higher resolution monitor to show better resolution.
 4. I have a retina display. It has some issues with that too.

I don't know how can we fix it. Can anyone help?

On Mon, Feb 22, 2016 at 6:06 PM, Xavier Bestel  wrote:
> Le lundi 22 février 2016 à 14:28 +1100, S. Brett Sutton a écrit :
>> Some questions to think about while solving this problem once and for
>> all:
>>
>> 1. What is the correct dpi to report on a projector?
>>
>> 2. How do we detect the default scale factor? Using a 10pt font at
>> 96dpi on a football stadium monitor is probably hard to read from the
>> stands.
>>
>> 3. Does the dpi need to adjust itself when we move further away
>> from/closer to the monitor? Should we detect this via webcam?
>>
>> 4. What dpi should curved monitors report?
>>
>> 5. How do we expect to integrate with web standards that assume 96dpi
>> everywhere?
>
> 6. How do you display a window which spans 2 monitors with different DPI ?
>
>
>
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Re: Font scaling

[Xavier Bestel]

Le lundi 22 février 2016 à 14:28 +1100, S. Brett Sutton a écrit :
> Some questions to think about while solving this problem once and for
> all:
> 
> 1. What is the correct dpi to report on a projector?
> 
> 2. How do we detect the default scale factor? Using a 10pt font at
> 96dpi on a football stadium monitor is probably hard to read from the
> stands.
> 
> 3. Does the dpi need to adjust itself when we move further away
> from/closer to the monitor? Should we detect this via webcam?
> 
> 4. What dpi should curved monitors report?
> 
> 5. How do we expect to integrate with web standards that assume 96dpi
> everywhere?

6. How do you display a window which spans 2 monitors with different DPI ?



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Font scaling

[S. Brett Sutton]

So I'm new to the Gnome community, so please be a little gentle :)

I started by reporting a bug under GTK but it was suggested that this 
list was a better starting place.


So here is the content of my original bug request along with a useful 
comment from a third party.


I've been running gnome 3.18 and wayland and for the most part its stable and 
I'm enjoying the experience.

I was however, very disappointed to find out that gnome/wayland was still 
completely failing to address font scaling issues correctly.

After a fair chunk of research I found that the only options are Font and 
Window Scaling and HiDpi which, to be blunt, just looks like an hack on top of 
existing hacks.

Neither of these do the required job for reasons I will explain shortly.

What I'm suggesting is that we need to rethink scaling in gnome, the current 
methods are hacks and don't work in the real world. Its time we stopped wasting 
time and got down to solving the real problem which is true font scaling where 
a 10 point font is displayed as 10 / 72 of an inch regardless of the screen 
resolution or screen dpi with other screen elements sized relative to the 
selected system font size.

So here are my use cases and why the above all fail.

I have at least four workstations that I move between, taking my laptop with me 
as I go.

At each workstation I have a different number of monitors (between 0 and 2) 
that I attach to my laptop.
The smallest monitor is the laptop which is 15.6" at 1920. The biggest is a 55" 
running at 4K (board room).

Each time I move between workstations I have to screw around with display settings 
and scaling. With at a least one of the workstations (28" 4K monitor), I can't 
use my laptop screen, as by the time I get the scaling large enough for the 4K 
monitor the laptop fonts are huge.

With the exception of the board room monitor I simply want each piece of text 
to be display to its correct physical size (e.g. 10 points is 10/72 of an 
inch). If the font size was consistent across these monitors then I could 
comfortably read text on any monitor and I wouldn't have to screw around with 
scaling each time I moved desks.
With the board room monitor I need to be able to scale the board room monitor 
(as its viewed from a distance) but not scale my laptop monitor.

As I'm getting older I can see in the future that I will want to scale my fonts 
up to a larger size but this should just be a matter of me changing the system 
font size to say 16 points rather than actually scaling fonts.

So what do we need.

1) Gnome MUST recognize the correct DPI for each attached monitor. Gnome should 
allow the DPI to be modified on a per monitor basis and the Gnome community 
(and everyone else) should do some work into shaming any monitor manufacturer 
that doesn't report the correct DPI.

2) Gnome MUST display fonts at the correct physical size (10 point is 10/72 of 
an inch) regardless of dpi or resolution.

3) Gnome should offer Font Scaling on a per monitor basis, but the default is 
that it scales fonts across all monitors with scaling resulting in the same 
physically sized font regardless of monitor size or dpi.

4) Window Scaling should be a factor of the font scaling. [Are there scenarios 
where this isn't the case?]

5) Gnome should offer window scaling. Default to scaling both monitors but 
provide an option to scale monitors individually

6) Gnome should dump the HiDPI setting as the above should supersede any such 
requirement.


So my core argument is that we need to do this properly and any other work is 
wasting time.
The reality is that this work has to be done sooner or later. During the 
transition to Wayland seems the ideal time.

I do understand that my suggestions are challenging but with a concerted effort 
I believe its achievable. If we can get a working group together I'm happy to 
contribute. I was once an excellent 'C' programmer (but rusty know) but have 
little knowledge of the internal workings of Gnome, but I'm happy to find out.

Brett

Comment 1 <https://bugzilla.gnome.org/show_bug.cgi?id=762418#c1>


Some questions to think about while solving this problem once and for all:

1. What is the correct dpi to report on a projector?

2. How do we detect the default scale factor? Using a 10pt font at 96dpi on a 
football stadium monitor is probably hard to read from the stands.

3. Does the dpi need to adjust itself when we move further away from/closer to 
the monitor? Should we detect this via webcam?

4. What dpi should curved monitors report?

5. How do we expect to integrate with web standards that assume 96dpi 
everywhere?




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