On Mon, Mar 16, 2015 at 9:01 AM, Lex Trotman <elextr@gmail.com> wrote:
As you no doubt found, Scintilla is included in the nightly. That
would probably only affect the folding icons, not the file ones.
Unfortunately none of us can test it on hidpi ;-)
I can (well, Apple calls the thing "retina").
I've been playing with hidpi a bit so I can give a little bit more information. I believe at least the fold expanders are drawn by scintilla using cairo. Only since cairo 1.14 it supports setting the pixel density using
cairo_surface_set_device_scale()
after which you can use the same code for hidpi/nohidpi screens (e.g. if you set the scale 2, for cairo coordinates you can still use 1px which is automatically drawn as 2px on the hidpi screens). With the GDK backend this is set for you by GDK which detects the screen resolution for you but you need at least GTK 3.10 (or 3.12, not sure now) compiled against cairo 1.14. So at least in theory it should work with recent GTK/cairo.
Now at least with the quartz (OS X) backend, I ran into several problems where some widgets were drawn hidpi and some not so for the OS X bundle I decided to use GTK 2 for now (fonts are fortunately rendered hidpi, just the graphics is a bit pixelated). I think the whole GTK hidpi support is quite young and will need some time to mature.
I don't think we have to do anything special for hidpi support in Geany itself except maybe providing higher resolution icons.