list-windows-gpu.rs

use std::{ffi::OsString, ptr};

use eyre::ensure;

#[cfg(windows)]
fn main() -> eyre::Result<()> {
    use std::os::windows::ffi::OsStringExt as _;

    use winapi::{
        ctypes::c_void,
        shared::{
            dxgi::{CreateDXGIFactory, IDXGIAdapter, IDXGIFactory, DXGI_ADAPTER_DESC},
            winerror::DXGI_ERROR_NOT_FOUND,
        },
        Interface as _,
    };

    macro_rules! try_hresult {
        ($result:expr) => {{
            let result = $result;
            ensure!(result == 0, "result={result}");
        }};
    }

    unsafe {
        let mut factory = ptr::null_mut::<IDXGIFactory>();
        let uuid = IDXGIFactory::uuidof();
        try_hresult!(CreateDXGIFactory(
            ptr::addr_of!(uuid),
            ptr::addr_of_mut!(factory) as *mut *mut c_void,
        ));
        let factory = &mut *factory;
        let mut i = 0;
        loop {
            let mut adapter = ptr::null_mut::<IDXGIAdapter>();
            let result = factory.EnumAdapters(i, ptr::addr_of_mut!(adapter));
            if result == DXGI_ERROR_NOT_FOUND {
                break Ok(());
            }
            try_hresult!(result);
            let adapter = &mut *adapter;
            let mut desc = DXGI_ADAPTER_DESC::default();
            try_hresult!(adapter.GetDesc(ptr::addr_of_mut!(desc)));
            eprintln!("====================");
            dbg!(i);
            dbg!(OsString::from_wide(&desc.Description));
            dbg!(desc.VendorId);
            dbg!(desc.DeviceId);
            dbg!(desc.SubSysId);
            dbg!(desc.Revision);
            dbg!(desc.DedicatedVideoMemory);
            dbg!(desc.DedicatedSystemMemory);
            dbg!(desc.SharedSystemMemory);
            dbg!(desc.AdapterLuid.LowPart);
            dbg!(desc.AdapterLuid.HighPart);
            i += 1;
        }
    }
}

[src\main.rs:45] i = 0
[src\main.rs:46] OsString::from_wide(&desc.Description) = "AMD Radeon(TM) Graphics\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
[src\main.rs:47] desc.VendorId = 4098
[src\main.rs:48] desc.DeviceId = 5688
[src\main.rs:49] desc.SubSysId = 175050792
[src\main.rs:50] desc.Revision = 197
[src\main.rs:51] desc.DedicatedVideoMemory = 520269824
[src\main.rs:52] desc.DedicatedSystemMemory = 0
[src\main.rs:53] desc.SharedSystemMemory = 16831870976
[src\main.rs:54] desc.AdapterLuid.LowPart = 67044
[src\main.rs:55] desc.AdapterLuid.HighPart = 0
====================
[src\main.rs:45] i = 1
[src\main.rs:46] OsString::from_wide(&desc.Description) = "NVIDIA GeForce RTX 3070 Laptop GPU\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
[src\main.rs:47] desc.VendorId = 4318
[src\main.rs:48] desc.DeviceId = 9437
[src\main.rs:49] desc.SubSysId = 177672232
[src\main.rs:50] desc.Revision = 161
[src\main.rs:51] desc.DedicatedVideoMemory = 8434745344
[src\main.rs:52] desc.DedicatedSystemMemory = 0
[src\main.rs:53] desc.SharedSystemMemory = 16831870976
[src\main.rs:54] desc.AdapterLuid.LowPart = 69400
[src\main.rs:55] desc.AdapterLuid.HighPart = 0
====================
[src\main.rs:45] i = 2
[src\main.rs:46] OsString::from_wide(&desc.Description) = "Microsoft Basic Render Driver\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
[src\main.rs:47] desc.VendorId = 5140
[src\main.rs:48] desc.DeviceId = 140
[src\main.rs:49] desc.SubSysId = 0
[src\main.rs:50] desc.Revision = 0
[src\main.rs:51] desc.DedicatedVideoMemory = 0
[src\main.rs:52] desc.DedicatedSystemMemory = 0
[src\main.rs:53] desc.SharedSystemMemory = 16831870976
[src\main.rs:54] desc.AdapterLuid.LowPart = 69312
[src\main.rs:55] desc.AdapterLuid.HighPart = 0

NvOptimusEnablementを宣言するとGeForceとRadeon(統合)が入れ替わる。

====================
[src\main.rs:45] i = 0
[src\main.rs:46] OsString::from_wide(&desc.Description) = "NVIDIA GeForce RTX 3070 Laptop GPU\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
[src\main.rs:47] desc.VendorId = 4318
[src\main.rs:48] desc.DeviceId = 9437
[src\main.rs:49] desc.SubSysId = 177672232
[src\main.rs:50] desc.Revision = 161
[src\main.rs:51] desc.DedicatedVideoMemory = 8434745344
[src\main.rs:52] desc.DedicatedSystemMemory = 0
[src\main.rs:53] desc.SharedSystemMemory = 16831870976
[src\main.rs:54] desc.AdapterLuid.LowPart = 69400
[src\main.rs:55] desc.AdapterLuid.HighPart = 0
====================
[src\main.rs:45] i = 1
[src\main.rs:46] OsString::from_wide(&desc.Description) = "AMD Radeon(TM) Graphics\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
[src\main.rs:47] desc.VendorId = 4098
[src\main.rs:48] desc.DeviceId = 5688
[src\main.rs:49] desc.SubSysId = 175050792
[src\main.rs:50] desc.Revision = 197
[src\main.rs:51] desc.DedicatedVideoMemory = 520269824
[src\main.rs:52] desc.DedicatedSystemMemory = 0
[src\main.rs:53] desc.SharedSystemMemory = 16831870976
[src\main.rs:54] desc.AdapterLuid.LowPart = 67044
[src\main.rs:55] desc.AdapterLuid.HighPart = 0
====================
[src\main.rs:45] i = 2
[src\main.rs:46] OsString::from_wide(&desc.Description) = "Microsoft Basic Render Driver\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
[src\main.rs:47] desc.VendorId = 5140
[src\main.rs:48] desc.DeviceId = 140
[src\main.rs:49] desc.SubSysId = 0
[src\main.rs:50] desc.Revision = 0
[src\main.rs:51] desc.DedicatedVideoMemory = 0
[src\main.rs:52] desc.DedicatedSystemMemory = 0
[src\main.rs:53] desc.SharedSystemMemory = 16831870976
[src\main.rs:54] desc.AdapterLuid.LowPart = 69312
[src\main.rs:55] desc.AdapterLuid.HighPart = 0

Optimusを切った場合、GeForceとMicrosoft Basic Render Driverしか見えなくなる。

NvOptimusEnablementを宣言したバイナリに対しては、NVIDIA Control Panelで"Integrated graphics"を指示してもGeForceが一番上に来る。