From 482d54118a733231cdceb4ab8eef2419fbec385e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?H=C3=A9ctor=20Ram=C3=B3n=20Jim=C3=A9nez?= <hector@hecrj.dev>
Date: Thu, 10 Apr 2025 23:25:20 +0200
Subject: [PATCH] Fix missing `_padding` in color conversion pipeline

---
 wgpu/src/color.rs         | 9 ++++++++-
 wgpu/src/triangle/msaa.rs | 3 +--
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/wgpu/src/color.rs b/wgpu/src/color.rs
index 0f2c202f..74a452f9 100644
--- a/wgpu/src/color.rs
+++ b/wgpu/src/color.rs
@@ -22,11 +22,18 @@ pub fn convert(
     struct Ratio {
         u: f32,
         v: f32,
+        // Padding field for 16-byte alignment.
+        // See https://docs.rs/wgpu/latest/wgpu/struct.DownlevelFlags.html#associatedconstant.BUFFER_BINDINGS_NOT_16_BYTE_ALIGNED
+        _padding: [f32; 2],
     }
 
     let ratio = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
         label: Some("iced-wgpu::triangle::msaa ratio"),
-        contents: bytemuck::bytes_of(&Ratio { u: 1.0, v: 1.0 }),
+        contents: bytemuck::bytes_of(&Ratio {
+            u: 1.0,
+            v: 1.0,
+            _padding: [0.0; 2],
+        }),
         usage: wgpu::BufferUsages::COPY_DST | wgpu::BufferUsages::UNIFORM,
     });
 
diff --git a/wgpu/src/triangle/msaa.rs b/wgpu/src/triangle/msaa.rs
index ceada486..d0449489 100644
--- a/wgpu/src/triangle/msaa.rs
+++ b/wgpu/src/triangle/msaa.rs
@@ -254,8 +254,7 @@ impl Targets {
 struct Ratio {
     u: f32,
     v: f32,
-    // Padding field to make Ratio 16 byte aligned
-    //
+    // Padding field for 16-byte alignment.
     // See https://docs.rs/wgpu/latest/wgpu/struct.DownlevelFlags.html#associatedconstant.BUFFER_BINDINGS_NOT_16_BYTE_ALIGNED
     _padding: [f32; 2],
 }