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Allow wgpu backend to be configured from the environment #1042
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hello 👋 Currently configuration is mostly done through then in your app you could do App::build().add_resource(WgpuOptions {
backend: "gl", // this is not yet implemented, and could be an enum rather than a string
..Default::default()
}) |
Because its up to the user to choose in which backend to run, we do not want it a compile time option. |
Some random assorted thoughts:
For the enum, I'm thinking it should be something like: struct WgpuOptions {
backend: WgpuBackend,
}
enum WgpuBackend {
Default, // BackendBit::Primary | BackendBit::Secondary
Vulkan, // BackendBit::Vulkan
Gl, // BackendBit::Gl
...
} |
Yep totally agreed. I'm making some PRs on gfx-rs/gfx-backend-gl and I think we are gonna be able to run the basic examples from bevy with OpenGL backend pretty soon |
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Made the changes. Did not set the secondary flag to the backend bit, as these indicate in-progress backends from the wgpu-rs/gfx team. |
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Looks good to me! |
Multiple backends for wgpu can be available in a system.
Allow force changing the default pick through an environment variable.
This should be useful for setting the backend BackendBit::GL that will allow us to access gfx-backend-gl backend of gfx.