From 76cec1b1fd533dda37aa53c40ef7665ed3b406b6 Mon Sep 17 00:00:00 2001
From: David Huculak <davidhuculak5@gmail.com>
Date: Sun, 3 Sep 2023 19:32:38 -0400
Subject: use @interpolate(flat) attribute as per the WebGPU spec:

User-defined vertex outputs and fragment inputs of scalar or vector integer type must always be specified as @interpolate(flat)

https://www.w3.org/TR/WGSL/#interpolation
---
 wgpu/src/shader/triangle.wgsl | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

(limited to 'wgpu/src/shader/triangle.wgsl')

diff --git a/wgpu/src/shader/triangle.wgsl b/wgpu/src/shader/triangle.wgsl
index 9f512d14..3a2b9845 100644
--- a/wgpu/src/shader/triangle.wgsl
+++ b/wgpu/src/shader/triangle.wgsl
@@ -38,22 +38,22 @@ fn solid_fs_main(input: SolidVertexOutput) -> @location(0) vec4<f32> {
 
 struct GradientVertexInput {
     @location(0) v_pos: vec2<f32>,
-    @location(1) colors_1: vec4<u32>,
-    @location(2) colors_2: vec4<u32>,
-    @location(3) colors_3: vec4<u32>,
-    @location(4) colors_4: vec4<u32>,
-    @location(5) offsets: vec4<u32>,
+    @location(1) @interpolate(flat) colors_1: vec4<u32>,
+    @location(2) @interpolate(flat) colors_2: vec4<u32>,
+    @location(3) @interpolate(flat) colors_3: vec4<u32>,
+    @location(4) @interpolate(flat) colors_4: vec4<u32>,
+    @location(5) @interpolate(flat) offsets: vec4<u32>,
     @location(6) direction: vec4<f32>,
 }
 
 struct GradientVertexOutput {
     @builtin(position) position: vec4<f32>,
     @location(0) raw_position: vec2<f32>,
-    @location(1) colors_1: vec4<u32>,
-    @location(2) colors_2: vec4<u32>,
-    @location(3) colors_3: vec4<u32>,
-    @location(4) colors_4: vec4<u32>,
-    @location(5) offsets: vec4<u32>,
+    @location(1) @interpolate(flat) colors_1: vec4<u32>,
+    @location(2) @interpolate(flat) colors_2: vec4<u32>,
+    @location(3) @interpolate(flat) colors_3: vec4<u32>,
+    @location(4) @interpolate(flat) colors_4: vec4<u32>,
+    @location(5) @interpolate(flat) offsets: vec4<u32>,
     @location(6) direction: vec4<f32>,
 }
 
-- 
cgit