Can you please open an Info window for darktable application (I'm
referring to 1.4.2 release obviously) and look for "Open in Low
Resolution" checkbox? Is it there, is it enabled and is it dimmed?

On Tue, 19 Aug 2014 18:00:34 +0200 (CEST)
"tiz...@libero.it" <tiz...@libero.it> wrote:

> 
> 
> >----Messaggio originale----
> >Da: para...@paraf.in
> >Data: 19/08/2014 11.22
> >A: <darktable-devel@lists.sourceforge.net>
> >Ogg: Re: [darktable-devel] darktable on HiDPI screen (rMBP)
> >
> >Hi,
> >
> >On Tue, 19 Aug 2014 11:01:17 +0200 (CEST)
> >"tiz...@libero.it" <tiz...@libero.it> wrote:
> >
> >> Hi all,
> >> 
> >> I just decided to try darktable on a Mac Book Pro with retina display (I 
> am 
> >> exploring the free alternatives to the rather expensive Adobe Lightroom).
> >> 
> >> As for many other applications on the Retina displays there are some 
> issues 
> >> due to the pixel scaling. Most of the interface looks great, but some 
> elements 
> >> show the "pixelated" effect due to pixel scaling. Unfortunately this 
> affects 
> >> also the main canvas where the photo are displayed and this renders the 
> entire 
> >> software essentially unusable for me.
> >
> >screenshots would be nice, some people mention from time to time
> >problems with high DPI, but few of them show how it looks exactly.
> >
> 
> I uploaded some screenshots here, comparing the different configurations I 
> tried so far.
> There's also a screenshot I took from the demo version of Lightroom 5, as a 
> benchmark.
> View the pictures at 100% zoom and you'll se what I mean by "pixelated".
> The effect is best noticed in the photo around the small lamp post and at the 
> nearby balcony.
> Going up with the resolution the effect is less noticeable, but it only 
> disappear with X11 in fullscreen
> (resolution set to the maximum with xrandr).
> 
> >> 
> >> After installing the latest release (1.4.2), I also pulled out the git 
> repo 
> >> and build dark table from source on my machine (darktable 1.5
> +1718~gf7b7ed6).  
> >> All dependencies have been installed through homebrew.
> >> 
> >> This version shows up as XQuartz window and entering X11 fullscreen in 
> high 
> >> resolution, the result is acceptable. Of course no pixelation, font size 
> is 
> >> somewhat small but still readable: overall better than in the released 
> version 
> >> (if there's a trade-off I'd rather favour image quality over menu 
> appearance).
> >> 
> >> Issues with this are that I have to enter X11 fullscreen (XQuartz issue), 
> and 
> >> most important I get a segfault 11 the second time I start dark table 
> (after 
> >> rebooting it starts again).
> >> 
> >> So here my questions:
> >> - Is there some advance in the development in order to solve the problems 
> with 
> >> HiDPI displays?
> >
> >Some time ago one of the users suggested adding NSPrincipalClass ->
> >NSApplication to Info.plist, which should have helped with retina
> >support, but we never got any solid confirmation what changed after I
> >did that. Also I think houz did some changes in git master which
> >concern UI scaling according to DPI setting, but I never tested that on
> >OS X.
> >
> >> - How do I properly build darktable from source on os x?
> >
> >See packaging/macosx/BUILD.txt. You have built gtk with X11 backend, I
> >use native quartz backend, which makes more sense to me.
> 
> Ok, I missed that file: I only followed the general build instructions. 
> Moreover, I'm rather new to OS X, so I don't actually know how to set the 
> native quartz backend. I'll have to look for some documentation and do some 
> trial and error.
> 
> >
> >> - Are there actually any developers testing/developing darktable on the 
> rMBP?
> >
> >I'm the only developer with Mac, and I don't have retina display, so no.
> >
> >> - By chance, does anybody know if I can get full resolution in XQuartz 
> >> also 
> in 
> >> rootless mode?
> >
> >I didn't even know that it has any modes other than rootless... How do
> >you enter fullscreen mode?
> >
> 
> Under the menu X11 -> Preferences, thick the Fullscreen Mode checkbox. Then 
> the combination alt-cmd-A toggles between Fullscreen and normal mode. To take 
> advantage of full retina resolution in fullscreen, I use "xrandr --output 
> default --mode 2880x1800 --rate 60".
> 
> 
> >> 
> >> Thanks and best regards!
> >> 
> >> Mauro
> >> 
> >> 
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> >
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