On Monday, 18 March 2019 09:59:36 PDT Vadim Peretokin wrote:
> I'm not clear on how to detect if a display is HiDPI with Qt. I've tried
> QApplication.desktop()->screen()->devicePixelRatio() but even that returns
> 1 for a display that is 3840x2160.
That is the correct way. The problem is that the display in question is
misconfigured.
qtdiag reports for me:
# 1 "DP1-1" Depth: 24 Primary: no
[...]
Geometry: 1920x1080+3200+0 (native: 3840x2160+3200+0) Available:
1920x1080+3200+0
Virtual geometry: 5120x1080+0+0 Available: 5120x1080+0+0
2 virtual siblings
Physical size: 600x340 mm Refresh: 30 Hz Power state: 0
Physical DPI: 81.28,80.6824 Logical DPI: 108.373,108.427 (native:
216.747,216.854) Subpixel_None
High DPI scaling factor: 2 DevicePixelRatio: 2 Pixel density: 2
Primary orientation: 2 Orientation: 2 Native orientation: 0
OrientationUpdateMask: 0
Source (qtdiag.cpp):
str << "DevicePixelRatio: " << screen->devicePixelRatio()
<< " Pixel density: " << platformScreen->pixelDensity();
This is with QT_AUTO_SCREEN_SCALE_FACTOR=1
--
Thiago Macieira - thiago.macieira (AT) intel.com
Software Architect - Intel System Software Products
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