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.
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.