Constant SDL_HINT_GPU_DRIVER 

pub const SDL_HINT_GPU_DRIVER: *const c_char = _; // {alloc4721<imm>: *const u8}

A variable that specifies a GPU backend to use.

By default, SDL will try all available GPU backends in a reasonable order until it finds one that can work, but this hint allows the app or user to force a specific target, such as “direct3d12” if, say, your hardware supports Vulkan but you want to try using D3D12 instead.

This hint should be set before any GPU functions are called.

Availability

This hint is available since SDL 3.2.0.