From 7d1005faad0404f4c36a996fecc7aee0184b665b Mon Sep 17 00:00:00 2001
From: Teodor Tanasoaia <28601907+teoxoy@users.noreply.github.com>
Date: Wed, 4 Oct 2023 14:27:27 +0200
Subject: [PATCH] [WebGPU] validate polygon mode (#4196)

---
 CHANGELOG.md            |  1 +
 wgpu/src/backend/web.rs | 12 ++++++++++++
 2 files changed, 13 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index bf05a41e37..850522ac2f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -161,6 +161,7 @@ By @teoxoy in [#4185](https://github.com/gfx-rs/wgpu/pull/4185)
 #### WebGPU
 
 - Ensure that limit requests and reporting is done correctly. By @OptimisticPeach in [#4107](https://github.com/gfx-rs/wgpu/pull/4107)
+- Validate usage of polygon mode. By @teoxoy in [#4196](https://github.com/gfx-rs/wgpu/pull/4196)
 
 #### Testing
 
diff --git a/wgpu/src/backend/web.rs b/wgpu/src/backend/web.rs
index 131b18976b..5e3fc01767 100644
--- a/wgpu/src/backend/web.rs
+++ b/wgpu/src/backend/web.rs
@@ -343,6 +343,18 @@ fn map_primitive_state(primitive: &wgt::PrimitiveState) -> web_sys::GpuPrimitive
     //TODO:
     //mapped.unclipped_depth(primitive.unclipped_depth);
 
+    match primitive.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
+        ),
+    }
+
     mapped
 }