Franck Charlet

I tried with sdl12-compat on mac os and indeed it didn't show the patterns.

Try it with latest commit, it *may* work.

remove sdl12-compat then.

Well install libsdl1.2-dev ?

Also it looks like sdm12-compat doesn't handle the right mouse button (at least it doesn't on mac os).

You know the deal then: https://github.com/libsdl-org/SDL-1.2

I'll come to that eventually, but the problems are that some platforms i support do not have SDL 2 (i haven't investigated that much yet) and migrating from 1 to...

The patterns are drawn with SDL_BlitSurface()

What are you going to do about that ?