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Re: [Texmacs-dev] TeXmacs on retina screens

From: Joris van der Hoeven
Subject: Re: [Texmacs-dev] TeXmacs on retina screens
Date: Tue, 4 Dec 2012 09:28:13 +0100
User-agent: Mutt/1.5.20 (2009-06-14)

Hi Max,

On Tue, Dec 04, 2012 at 12:07:35AM +0100, Gubinelli Massimiliano wrote:
> as far as I understand the qt port ready works fine under retina (checked on 
> my machine) the real issue is that we have to provide bitmapped fonts at 
> double screen resolution and I was not able to understand how to do this. the 
> same should be done for icons. retina display is just a standard display 
> where resolution is more or less 144 dpi instead of 72 so if Jpris help me in 
> obtaining that texmacs produce screen fonts at that resolution it should be 
> possible to convince qt to put them onscreen in the right way. 
> I currently cannot use my retina laptop since texmacs does not work properly 
> so I'm very much interested in improving it in that direction.

Yes, Ingolf/Max are right in the sense that TeXmacs works "fine",
except that no advantage is taken out of the higher resolution.

In principle, TeXmacs is able to work with fonts at higher resolution,
and arbitrary size icons (by the way, I just committed the SVG versions
of the new set of TeXmacs icons, which one should use in this case).
So there is no real obstacle on our side.

It rather seems to on the Qt/X11 side that there is a problem,
because 1 pixel is no longer 1 pixel on a retina screen (some kind of
automatic zooming is applied).  It is not clear to me how to modify
the renderers so as to work on Retina screens.  Please investigate
the available APIs; as soon as I understand what should be done,
I can help to do the necessary things.

Best wishes, --Joris

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