1 files changed, 121 insertions, 0 deletions
diff --git a/third_party/rust/d3d12/src/lib.rs b/third_party/rust/d3d12/src/lib.rs
new file mode 100644
index 0000000000..e52f9d9d46
--- /dev/null
+++ b/third_party/rust/d3d12/src/lib.rs
@@ -0,0 +1,121 @@
+#[macro_use]
+extern crate bitflags;
+
+use std::{convert::TryFrom, ffi::CStr};
+use winapi::{
+    shared::dxgiformat,
+    um::{d3d12, d3dcommon},
+};
+
+mod com;
+mod command_allocator;
+mod command_list;
+mod debug;
+mod descriptor;
+mod device;
+mod dxgi;
+mod heap;
+mod pso;
+mod query;
+mod queue;
+mod resource;
+mod sync;
+
+pub use crate::com::*;
+pub use crate::command_allocator::*;
+pub use crate::command_list::*;
+pub use crate::debug::*;
+pub use crate::descriptor::*;
+pub use crate::device::*;
+pub use crate::dxgi::*;
+pub use crate::heap::*;
+pub use crate::pso::*;
+pub use crate::query::*;
+pub use crate::queue::*;
+pub use crate::resource::*;
+pub use crate::sync::*;
+
+pub use winapi::shared::winerror::HRESULT;
+
+pub type D3DResult<T> = (T, HRESULT);
+pub type GpuAddress = d3d12::D3D12_GPU_VIRTUAL_ADDRESS;
+pub type Format = dxgiformat::DXGI_FORMAT;
+pub type Rect = d3d12::D3D12_RECT;
+pub type NodeMask = u32;
+
+/// Index into the root signature.
+pub type RootIndex = u32;
+/// Draw vertex count.
+pub type VertexCount = u32;
+/// Draw vertex base offset.
+pub type VertexOffset = i32;
+/// Draw number of indices.
+pub type IndexCount = u32;
+/// Draw number of instances.
+pub type InstanceCount = u32;
+/// Number of work groups.
+pub type WorkGroupCount = [u32; 3];
+
+pub type TextureAddressMode = [d3d12::D3D12_TEXTURE_ADDRESS_MODE; 3];
+
+pub struct SampleDesc {
+    pub count: u32,
+    pub quality: u32,
+}
+
+#[repr(u32)]
+#[non_exhaustive]
+pub enum FeatureLevel {
+    L9_1 = d3dcommon::D3D_FEATURE_LEVEL_9_1,
+    L9_2 = d3dcommon::D3D_FEATURE_LEVEL_9_2,
+    L9_3 = d3dcommon::D3D_FEATURE_LEVEL_9_3,
+    L10_0 = d3dcommon::D3D_FEATURE_LEVEL_10_0,
+    L10_1 = d3dcommon::D3D_FEATURE_LEVEL_10_1,
+    L11_0 = d3dcommon::D3D_FEATURE_LEVEL_11_0,
+    L11_1 = d3dcommon::D3D_FEATURE_LEVEL_11_1,
+    L12_0 = d3dcommon::D3D_FEATURE_LEVEL_12_0,
+    L12_1 = d3dcommon::D3D_FEATURE_LEVEL_12_1,
+}
+
+impl TryFrom<u32> for FeatureLevel {
+    type Error = ();
+
+    fn try_from(value: u32) -> Result<Self, Self::Error> {
+        Ok(match value {
+            d3dcommon::D3D_FEATURE_LEVEL_9_1 => Self::L9_1,
+            d3dcommon::D3D_FEATURE_LEVEL_9_2 => Self::L9_2,
+            d3dcommon::D3D_FEATURE_LEVEL_9_3 => Self::L9_3,
+            d3dcommon::D3D_FEATURE_LEVEL_10_0 => Self::L10_0,
+            d3dcommon::D3D_FEATURE_LEVEL_10_1 => Self::L10_1,
+            d3dcommon::D3D_FEATURE_LEVEL_11_0 => Self::L11_0,
+            d3dcommon::D3D_FEATURE_LEVEL_11_1 => Self::L11_1,
+            d3dcommon::D3D_FEATURE_LEVEL_12_0 => Self::L12_0,
+            d3dcommon::D3D_FEATURE_LEVEL_12_1 => Self::L12_1,
+            _ => return Err(()),
+        })
+    }
+}
+
+pub type Blob = WeakPtr<d3dcommon::ID3DBlob>;
+
+pub type Error = WeakPtr<d3dcommon::ID3DBlob>;
+impl Error {
+    pub unsafe fn as_c_str(&self) -> &CStr {
+        debug_assert!(!self.is_null());
+        let data = self.GetBufferPointer();
+        CStr::from_ptr(data as *const _ as *const _)
+    }
+}
+
+#[cfg(feature = "libloading")]
+#[derive(Debug)]
+pub struct D3D12Lib {
+    lib: libloading::Library,
+}
+
+#[cfg(feature = "libloading")]
+impl D3D12Lib {
+    pub fn new() -> Result<Self, libloading::Error> {
+        unsafe { libloading::Library::new("d3d12.dll").map(|lib| D3D12Lib { lib }) }
+    }
+}