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Homebrew development for the RG35XXH -- How to get a graphical display?

TL;DR: What linux API should be used to render a game to the screen on the RG35XXH?

I'm trying to port a solitaire game to the RG35XXH. Currently I'm using GLFW to get a window on my laptop; however GLFW doesn't support running without an X11 or Wayland server running.

I looked into EGL, which worked, kind of. It can fetch an OpenGL ES context but it has no way to display the rendered framebuffer to the screen.

Most recently I looked into KMS + DRM. I found a repository with code explaining how to interface with the DRM, and got it working on my laptop, which is nice! However on the RG35XXH (with Batocera v40) there is no /dev/dri/ folder 😦 . I can only assume that this means Batocera doesn't use DRI/DRM/KMS at the moment.

Next I might try using a frame buffer device. Running cat /dev/urandom > /dev/fb0 fills the screen with random colors; so I should be able to implement rendering with it. However I don't know if this is the correct route to go.

Now, as I understand it, SDL2 is supposed to support rendering to these types of devices. I've been avoiding SDL2 as I would prefer to distribute the program as a single executable file, and its license makes that more difficult.

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U.S. Sues Apple, Accusing It of Maintaining an iPhone Monopoly
  • This headline is wrong. The DOJ is alleging that they are being anticompetitive in the Performance Smartphone market, and further that their anticompetitive behavior affects even the regular smartphone market.

  • U.S. Sues Apple, Accusing It of Maintaining an iPhone Monopoly
  • The document published by the DOJ make the point that Apple has closer to 65% market share of you to by revenue, and also have a high market share amoung the teens. But I don't get this focus on whether or not Apple is a monopoly. The lawsuit alleges that Apple has a significant market share is using anticompetitive practices to stay there.

  • What kinda game is that?
  • Is that with Linux kernel specifically or the user space? I've heard that Linus tries to keep the kernel interface stable, but most userspace progtams don't share that philosophy.

  • InitialsDiceBearhttps://github.com/dicebear/dicebearhttps://creativecommons.org/publicdomain/zero/1.0/„Initials” (https://github.com/dicebear/dicebear) by „DiceBear”, licensed under „CC0 1.0” (https://creativecommons.org/publicdomain/zero/1.0/)GE
    geemili @lemm.ee
    Posts 1
    Comments 12