GAL: Black cursor in OpenGL with subpixel anti-aliasing

[firewalker]

When using antialiasing for OpenGL (Preferences -> Display) there are some visual issues with the cursor and the grid.

Subpixel Antialiasing (both High and Ultra quality): Black cursor. Really hard to see the cursor. See image bellow.

http://i.imgur.com/c10DVDX.png

Supersampling (2x): White cursor, but really low visibility of the grid.

http://i.imgur.com/RBLQnKA.png

Supersampling (4x): White cursor, NO visibility of the grid.

http://i.imgur.com/47pILMF.png

Application: kicad
Version: (2017-03-22 revision 9fe780f1b)-master, release build
Libraries: wxWidgets 3.0.2
           libcurl/7.53.1 OpenSSL/1.0.2k zlib/1.2.11 libpsl/0.17.0 (+libicu/58.2) libssh2/1.8.0
Platform: Linux 4.10.3-1-ARCH i686, 32 bit, Little endian, wxGTK
- Build Info -
wxWidgets: 3.0.2 (wchar_t,wx containers,compatible with 2.8)
Boost: 1.63.0
Curl: 7.53.1
KiCad - Compiler: GCC 6.3.1 with C++ ABI 1010
        Settings: USE_WX_GRAPHICS_CONTEXT=OFF
                  USE_WX_OVERLAY=OFF
                  KICAD_SCRIPTING=ON
                  KICAD_SCRIPTING_MODULES=ON
                  KICAD_SCRIPTING_WXPYTHON=ON
                  KICAD_SCRIPTING_ACTION_MENU=OFF
                  BUILD_GITHUB_PLUGIN=ON
                  KICAD_USE_OCE=ON

[John Beard (john-j-beard)]

Grid lines are now covered by lp:1675311. This issue can be for the black cursor.

[John Beard (john-j-beard)]

Interestingly, this is /not/ caused by subpixel AA causing a 1-px line to look black. Widening the line to 3px still results in a black cursor.

Also, the black isn't pure black, it's a dark colour that varies on zoom level. When there's a lot of green on screen, it can be drak green, and a lot of red can make it dark red.

[Maciej Suminski (orsonmmz)]

firewalker: can you confirm it is still a problem? I remember seeing this as well, but now it looks fine on my PC. I am marking the report as 'incomplete', waiting for feedback.

[firewalker (firew4lker)]

The issue with the cursor seems to be ok now.

There is an issue with the dots of the grid. It fades when subpixel antilising is enabled.

[Launchpad Janitor (janitor)]

[Expired for KiCad because there has been no activity for 60 days.]

[Nick Østergaard (nickoe)]

Feedback was received recently, reopening.

[Jeff Young (jeyjey)]

@Nick, feedback regarding black cursor or grid dots? Has it been fixed by the recent OpenGL shader changes?

[Nick Østergaard (nickoe)]

@Jeff, I was just reffering to firewalkers comment in #4. I don't know what the current state is

[Jeff Young (jeyjey)]

Cool. That was fixed.