DX12 doesn't support Features::POLYGON_MODE_POINT (#4032)

CHANGELOG.md

@@ -77,6 +77,10 @@ By @Valaphee in [#3402](https://github.com/gfx-rs/wgpu/pull/3402)
 #### Vulkan
 - Fix enabling `wgpu::Features::PARTIALLY_BOUND_BINDING_ARRAY` not being actually enabled in vulkan backend. By @39ali in[#3772](https://github.com/gfx-rs/wgpu/pull/3772).
 
+#### DX12
+
+- DX12 doesn't support `Features::POLYGON_MODE_POINT``. By @teoxoy in [#4032](https://github.com/gfx-rs/wgpu/pull/4032).
+
 ## v0.17.0 (2023-07-20)
 
 This is the first release that featured `wgpu-info` as a binary crate for getting information about what devices wgpu sees in your system. It can dump the information in both human readable format and json.

wgpu-hal/src/dx12/adapter.rs

@@ -242,7 +242,6 @@ impl super::Adapter {
             | wgt::Features::ADDRESS_MODE_CLAMP_TO_BORDER
             | wgt::Features::ADDRESS_MODE_CLAMP_TO_ZERO
             | wgt::Features::POLYGON_MODE_LINE
-            | wgt::Features::POLYGON_MODE_POINT
             | wgt::Features::VERTEX_WRITABLE_STORAGE
             | wgt::Features::TEXTURE_ADAPTER_SPECIFIC_FORMAT_FEATURES
             | wgt::Features::TIMESTAMP_QUERY

wgpu-hal/src/dx12/conv.rs

@@ -213,12 +213,12 @@ pub fn map_topology(
 
 pub fn map_polygon_mode(mode: wgt::PolygonMode) -> d3d12_ty::D3D12_FILL_MODE {
     match mode {
-        wgt::PolygonMode::Point => {
-            log::error!("Point rasterization is not supported");
-            d3d12_ty::D3D12_FILL_MODE_WIREFRAME
-        }
-        wgt::PolygonMode::Line => d3d12_ty::D3D12_FILL_MODE_WIREFRAME,
         wgt::PolygonMode::Fill => d3d12_ty::D3D12_FILL_MODE_SOLID,
+        wgt::PolygonMode::Line => d3d12_ty::D3D12_FILL_MODE_WIREFRAME,
+        wgt::PolygonMode::Point => panic!(
+            "{:?} is not enabled for this backend",
+            wgt::Features::POLYGON_MODE_POINT
+        ),
     }
 }
 

wgpu-hal/src/gles/conv.rs

@@ -279,8 +279,18 @@ pub fn map_primitive_topology(topology: wgt::PrimitiveTopology) -> u32 {
 }
 
 pub(super) fn map_primitive_state(state: &wgt::PrimitiveState) -> super::PrimitiveState {
-    //Note: state.polygon_mode is not supported, see `Features::POLYGON_MODE_LINE` and
-    //`Features::POLYGON_MODE_POINT`
+    match state.polygon_mode {
+        wgt::PolygonMode::Fill => {}
+        wgt::PolygonMode::Line => panic!(
+            "{:?} is not enabled for this backend",
+            wgt::Features::POLYGON_MODE_LINE
+        ),
+        wgt::PolygonMode::Point => panic!(
+            "{:?} is not enabled for this backend",
+            wgt::Features::POLYGON_MODE_POINT
+        ),
+    }
+
     super::PrimitiveState {
         //Note: we are flipping the front face, so that
         // the Y-flip in the generated GLSL keeps the same visibility.

wgpu-types/src/lib.rs

@@ -679,7 +679,6 @@ bitflags::bitflags! {
         /// This allows only drawing the vertices of polygons/triangles instead of filled
         ///
         /// Supported platforms:
-        /// - DX12
         /// - Vulkan
         ///
         /// This is a native only feature.