From 517018e9aece997b6f6490af6cdef4c8d5c69f98 Mon Sep 17 00:00:00 2001
From: Erich Gubler <erichdongubler@gmail.com>
Date: Thu, 22 May 2025 12:51:51 -0400
Subject: [PATCH] refactor(dx12): detect
 `UnrestrictedBufferTextureCopyPitchSupported`

---
 wgpu-hal/src/dx12/adapter.rs | 17 +++++++++++++++++
 wgpu-hal/src/dx12/mod.rs     |  1 +
 2 files changed, 18 insertions(+)

diff --git a/wgpu-hal/src/dx12/adapter.rs b/wgpu-hal/src/dx12/adapter.rs
index 140dcf60a..9d174adf0 100644
--- a/wgpu-hal/src/dx12/adapter.rs
+++ b/wgpu-hal/src/dx12/adapter.rs
@@ -200,6 +200,21 @@ impl super::Adapter {
             .is_ok()
         };
 
+        let unrestricted_buffer_texture_copy_pitch_supported = {
+            let mut features13 = Direct3D12::D3D12_FEATURE_DATA_D3D12_OPTIONS13::default();
+            unsafe {
+                device.CheckFeatureSupport(
+                    Direct3D12::D3D12_FEATURE_D3D12_OPTIONS13,
+                    <*mut _>::cast(&mut features13),
+                    size_of_val(&features13) as u32,
+                )
+            }
+            .is_ok()
+                && features13
+                    .UnrestrictedBufferTextureCopyPitchSupported
+                    .as_bool()
+        };
+
         let mut max_sampler_descriptor_heap_size =
             Direct3D12::D3D12_MAX_SHADER_VISIBLE_SAMPLER_HEAP_SIZE;
         {
@@ -304,6 +319,8 @@ impl super::Adapter {
             suballocation_supported: !info.name.contains("Iris(R) Xe"),
             shader_model,
             max_sampler_descriptor_heap_size,
+            _unrestricted_buffer_texture_copy_pitch_supported:
+                unrestricted_buffer_texture_copy_pitch_supported,
         };
 
         // Theoretically vram limited, but in practice 2^20 is the limit
diff --git a/wgpu-hal/src/dx12/mod.rs b/wgpu-hal/src/dx12/mod.rs
index 125a88287..16c967aa9 100644
--- a/wgpu-hal/src/dx12/mod.rs
+++ b/wgpu-hal/src/dx12/mod.rs
@@ -601,6 +601,7 @@ struct PrivateCapabilities {
     suballocation_supported: bool,
     shader_model: naga::back::hlsl::ShaderModel,
     max_sampler_descriptor_heap_size: u32,
+    _unrestricted_buffer_texture_copy_pitch_supported: bool,
 }
 
 #[derive(Default)]