Matevž Tadel

I've moved the png low-level code into libAfterImage, added docs, and added the two classes (TGLSdfFontMaker and TASPngWriter) into appropriate link-defs.

Hmmh, it seems CI builds can not find the new file from graf2d/asimage/libAfterImage/: ``` [ 86%] Building CXX object graf2d/asimage/CMakeFiles/ASImage.dir/src/TASPngWriter.cxx.o Error: /github/home/ROOT-CI/src/graf2d/asimage/src/TASPngWriter.cxx:3:10: fatal error: afterrootpngwrite.h: No such file or directory...

Oh, I see now ... builtin_afterimage is not used in the CI builds -- and might or might not be used in an arbitrary build. That means my changes can...

Vincenzo told me `builtin_afterimage` is always on now ... and Danilo told me to add the `clean build` tag. Now things seem to be building as expected on linuxen. Something...

I don't know how or why but AFTERIMAGE build did not run for windows and mac.

Ah, checked on Alja's mac ... me R an idiot ... forgot to include config.h :)

Yay, thanks for your help Sergey! I put `TGLSdfFontMaker` in RGL as it requires off-screen GL context to render the SDF font texture. RGL already depends on libASImage ... TGLViewer::SaveAs()...

I want to see it :) Especially after the tricky issue on mac. It seemed to run fine but the font texture was just noise.

Hi! :) RGL cmake file has already listed the dependency on ASImage before this. There are functions in TGLViewer that use TImage to export screenshots and to load textures. I...