Xpra: Ticket #1580: sub-pixel rendering test application

Follow up from #559.

The same way that #1553 provided a test application for #1309 (image depth settings), we should provide test applications for sub-pixel rendering.



Thu, 20 Jul 2017 16:48:29 GMT - Antoine Martin: status, milestone changed


Thu, 03 Aug 2017 16:26:30 GMT - Antoine Martin: attachment set

screenshot of the new fontrendering test application


Thu, 03 Aug 2017 16:34:50 GMT - Antoine Martin: attachment set

test app running on win32


Thu, 03 Aug 2017 16:54:55 GMT - Antoine Martin:

r16604 adds a test application (very slow to run..), which looks like this on Linux (with or without xpra): screenshot of the new fontrendering test application

The right hand side shows the difference between the antialias setting shown on the left and the "NONE" setting.

So far it shows that I am unable to force sub-pixel rendering to turn on, only gray (which is the default is seems).

Interestingly, it does enable sub-pixel rendering on MS Windows where the colours are clearly visible on the deltas: test app running on win32 Looks like it uses more blue on the right hand side, and orange (red) on the left. So this would imply an RGB sub-pixel order which is correct. (this inverted since we XOR the two images!) And this is confirmed by the value retrieved through the API, see Native_GUI.exe output.


Thu, 10 Aug 2017 15:45:23 GMT - Antoine Martin: status changed; resolution set


Sat, 23 Jan 2021 05:28:16 GMT - migration script:

this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/1580