test(d3d12): Add D3D12 render test

librashader-test/Cargo.toml

@@ -28,7 +28,7 @@ opengl = ["librashader/runtime-gl", "dep:glow", "dep:glfw"]
 wgpu = ["librashader/runtime-wgpu", "dep:wgpu", "dep:wgpu-types"]
 
 d3d11 = ["librashader/runtime-d3d11", "dep:windows"]
-d3d12 = ["librashader/runtime-d3d12", "dep:windows"]
+d3d12 = ["librashader/runtime-d3d12", "dep:windows", "dep:d3d12-descriptor-heap"]
 d3d9 = ["librashader/runtime-d3d9", "dep:windows"]
 
 metal = ["librashader/runtime-metal", "dep:objc2", "dep:objc2-metal"]

librashader-test/src/render/d3d12/descriptor_heap.rs

@@ -0,0 +1,35 @@
+use d3d12_descriptor_heap::D3D12DescriptorHeapType;
+use windows::Win32::Graphics::Direct3D12::{
+    D3D12_DESCRIPTOR_HEAP_DESC, D3D12_DESCRIPTOR_HEAP_FLAG_NONE,
+    D3D12_DESCRIPTOR_HEAP_TYPE_CBV_SRV_UAV, D3D12_DESCRIPTOR_HEAP_TYPE_RTV,
+};
+
+#[derive(Clone)]
+pub struct CpuStagingHeap;
+
+#[derive(Clone)]
+pub struct RenderTargetHeap;
+
+impl D3D12DescriptorHeapType for RenderTargetHeap {
+    // Lut texture heaps are CPU only and get bound to the descriptor heap of the shader.
+    fn create_desc(size: usize) -> D3D12_DESCRIPTOR_HEAP_DESC {
+        D3D12_DESCRIPTOR_HEAP_DESC {
+            Type: D3D12_DESCRIPTOR_HEAP_TYPE_RTV,
+            NumDescriptors: size as u32,
+            Flags: D3D12_DESCRIPTOR_HEAP_FLAG_NONE,
+            NodeMask: 0,
+        }
+    }
+}
+
+impl D3D12DescriptorHeapType for CpuStagingHeap {
+    // Lut texture heaps are CPU only and get bound to the descriptor heap of the shader.
+    fn create_desc(size: usize) -> D3D12_DESCRIPTOR_HEAP_DESC {
+        D3D12_DESCRIPTOR_HEAP_DESC {
+            Type: D3D12_DESCRIPTOR_HEAP_TYPE_CBV_SRV_UAV,
+            NumDescriptors: size as u32,
+            Flags: D3D12_DESCRIPTOR_HEAP_FLAG_NONE,
+            NodeMask: 0,
+        }
+    }
+}