DPI Data

Data collected to try to help understand Operating System DPI settings.

MS Windows

Monitor specific data (also depends on graphics card, cable, ..).

Graphics Card	Monitors	Cables	Resolution	Vertical Refresh
?	Dell P2815Q	DP?	3820x2160	29
?	HP ZR2740w IPS	DP?	2560x1440	59
?	Dell P2815Q + HP ZR2740w IPS	DP? + HDMI	3820x2160 + 1280x720	29

Unless stated otherwise, the same monitor settings were used for collecting the data.

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• Windows 8.1 with ​SetProcessDPIAware enabled. (XPRA_DPI_AWARE=1 - which is the default)

Data collected using Native_gui.exe.

Text Size	dpi	cursor_size	window_frame.caption	window_frame.frame	window_frame.menu-bar	window_frame.minimum	window_frame.normal	window_frame.offset
Smallest	96	32	23	8, 8, 31, 8	20	140, 39	8, 8	8, 31
Second smallest	120	32	29	9, 9, 38, 9	25	178, 47	9, 9	9, 38
Third smallest	144	48	34	11, 11, 45, 11	30	210, 56	11, 11	11, 45
Fourth smallest	192	64	45	13, 13, 58, 13	39	274, 71	13, 13	13, 58
Fifth smallest	240	64	56	16, 16, 72, 16	49	340, 88	16, 16	16, 72

Workarea information (with the taskbar shown at the bottom of the screen):

• Dell P2815Q at 3840x2160:

Text Size	Total Workarea
Smallest	0, 0, 3840, 2120
Second mallest	0, 0, 3840, 2112
Third Smallest	0, 0, 3840, 2104
Fourth Smallest	0, 0, 3840, 2088
Fifth Smallest	0, 0, 3840, 2072

• HP ZR2740w IPS at 2560x1440:

Text Size	Total Workarea
Smallest	0, 0, 2560, 1400
Second mallest	0, 0, 2560, 1392
Third Smallest	0, 0, 2560, 1384
Fourth Smallest	0, 0, 2560, 1368
Fifth Smallest	n/a

• Dell P2815Q at 3820x2160 & HP ZR2740x IPS at 1280x720:

Text Size	Total Workarea	Workarea 1	Workarea 2
Smallest	0, 0, 5120, 2120	0, 0, 3840, 2120	0, 0, 1280, 680
Second mallest	0, 0, 5440, 2112	0, 0, 3840, 2112	0, 0, 1600, 840
Third Smallest	0, 0, 5760, 2104	0, 0, 3840, 2104	0, 0, 1920, 996
Fourth Smallest	0, 0, 6400, 2088	0, 0, 3840, 2088	0, 0, 2560, 1440
Fifth Smallest	0, 0, 7040, 2072	0, 0, 3840, 2072	0, 0, 3200, 1800

From this we can infer that the size of the taskbar (which reduces the available workarea) does not change with the monitor resolution, only the text size (but it may be affected by scaling, no data available to confirm):

Text Size	Taskbar Size
Smallest	40
Second Smallest	48
Third Smallest	56
Fourth Smallest	72
Fifth Smallest	88