[QScintilla] Blurry rendering of text on Retina displays on OS X

[Phil Thompson]

On Tue, 3 Dec 2013 15:50:52 +0100, "Alan Garny" <agarny at hellix.com> wrote:
> Hi,
> 
> I am using QScintilla (I have just upgraded to version 2.8) with Qt
5.1.1,
> and one of my users just told me of the rendered text being blurry on
his
> Retina display on OS X.
> 
> After various tests, it would seem that the issue is with QScintilla
itself
> (rather than my application, Qt or even Scintilla). Indeed, I have
> downloaded, built and tested QScintilla and Scintilla directly, and
> everything works as expected with Scintilla (using their Cocoa
> ScintillaTest; I wanted to use the 'qt' version, but that folder doesn't
> contain any test application) while it doesn't with QScintilla (using
your
> example-Qt4Qt5).
> 
> For my testing, I simply called:
> 
>                 $ defaults write -g AppleMagnifiedMode YES
> 
> then ran the QScintilla and Scintilla test applications, and then
called:
> 
>                 $ defaults write -g AppleMagnifiedMode NO
> 
> and re-ran the QScintilla and Scintilla test applications, expecting a
> difference in the rendering of the applications' various texts,
including
> that of the editing widget itself.
> 
> Some screenshots illustrating the above can be found at
> https://github.com/opencor/opencor/issues/248#issuecomment-29712073. As
you
> can see, there is no difference (i.e. blurry) in the way QScintilla
renders
> its contents while Scintilla does, as expected, renders its contents
> differently depending on whether AppleMagnifiedMode is set to YES or NO.
> 
> Hopefully, this is an issue that you can identify and fix very quickly
(I
> am
> really interested in some of QScintilla's features, so it would be a
real
> shame if I had to use Scintilla directly).

Your tests don't rule out a Qt problem.

Does the problem occur with the standard Qt examples?

Does the problem occur with the display of a file dialog using the
QScintilla example?

Thanks,
Phil