kitty
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kovidgoyal
Downgrade OpenGL version requirement to 3.1
There are only a few features required from newer versions, and they can be achieved via extensions. This significantly improves compatibility.
Could you tell me a little about what is the increase in compatibility. Is there some specific device/line of devices that support 3.1 but not 3.3 that this will help with?
See #2790. In particular, GL 3.2 requires geometry shader support, which a bunch of hardware does not support (like ARM and Apple GPUs). Emulating that somehow is not impossible, but Mesa has no such emulation today and this is unlikely to be fixed any time soon. This should make kitty work on ARM GPUs (Panfrost) today, and Apple GPUs (Asahi) in the near future. See https://mesamatrix.net/.
In general, you should always aim to use the lowest reasonable GL version and request extensions for additional functionality, to improve compatibility.
OK I'll merge it if it works on all the GPUs I have to test with, thanks.
This PR prevents kitty from running on macOS with the error: The targeted version of macOS does not support OpenGL 3.0 or 3.1 but might support 3.2 or newer.
You should probably #ifdef __APPLE__ out the changes.