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

status changed from new to assigned
milestone changed from 3.0 to 2.2

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

attachment set to fontrendering.png

screenshot of the new fontrendering test application

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

attachment set to fontrendering-win32.png

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):

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: 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

status changed from assigned to closed
resolution set to fixed

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

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