El lunes, 19 de febrero de 2018 08:04:24 -03 wm4 escribió: > On Mon, 19 Feb 2018 07:54:11 -0300 [snip] > Yeah, that is strange.
*Too* strange. According to src/gui/kernel/qhighdpiscaling.cpp:
2) Per-screen scale factors
Some platform plugins support providing a per-screen scale
factor based on display density information. These platforms
include X11, Windows, and Android.
There are two APIs for enabling or disabling this behavior:
- The QT_AUTO_SCREEN_SCALE_FACTOR environment variable.
- The AA_EnableHighDpiScaling and AA_DisableHighDpiScaling
application attributes
Enabling either will make QHighDpiScaling call
QPlatformScreen::pixelDensity()
and use the value provided as the scale factor for the screen in
question. Disabling is done on a 'veto' basis where either the
environment or the application can disable the scaling. The intended
use
cases are 'My system is not providing correct display density
information' and 'My application needs to work in display pixels',
respectively.
And efectively the code does that in usePixelDensity() from the same code.
QPlatformScreen::pixelDensity() in X11 is implemented by
src/plugins/platforms/xcb/qxcbscreen.cpp, which is the file that the patch
touches.
So the fact that the env variable "does not changes things" for you is really
really strange.
Let's also look at the patch:
- m_pixelDensity = qMax(1, qRound(dpi/96));
+ m_pixelDensity = qMax(1, (int) (dpi/96));
The first line is the original code. The only way I see this could work for
you in -10 but not in -12 is that (dpi/96) > 2.
Please tell me which exact branch and model of monitor you have please, so I
can check this value.
> I didn't create a new user, because that would
> change nothing. I made sure to override all environment variables for
> the test.
OK, but don't complain later if things do not work out for you.
> I can't test anymore because after fighting Debian's
> absolutely crappy package manager to make it downgrade to testing's
> Qt packages, it works again. (And I'll defend my word choice "crappy".
> Why can't it figure out transitive dependencies? It's just bad.
> aptitude didn't behave better.)
And this behavior makes me want to avoid helping you any further. So if you
really value our work and are willing to help, please stop with this.
--
<perrito666> SlackDeb: velo como un entrenamiento shaolin para geeks,
en vez de meditación y tortura física, abstinencia de internet y sexo
Horacio Francisco Sebastián "Perrito" Durán Barrionuevo, sobre un
viaje que Federico "SlackDeb" Peretti estaba planeando con su novia.
Lisandro Damián Nicanor Pérez Meyer
http://perezmeyer.com.ar/
http://perezmeyer.blogspot.com/
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