From 446fdad33e4e23efa7a6f973d0aaef7aed118ba9 Mon Sep 17 00:00:00 2001
From: Joshua Groves <josh@joshgroves.com>
Date: Mon, 3 Dec 2018 21:21:19 -0700
Subject: [PATCH] Add `repr(transparent)` to buffer usage flags

---
 wgpu-bindings/wgpu.h        | 18 ++++++++++++++++++
 wgpu-native/src/resource.rs |  1 +
 2 files changed, 19 insertions(+)

diff --git a/wgpu-bindings/wgpu.h b/wgpu-bindings/wgpu.h
index d7a398acf..6299c9c08 100644
--- a/wgpu-bindings/wgpu.h
+++ b/wgpu-bindings/wgpu.h
@@ -269,6 +269,24 @@ typedef struct {
   uint32_t array_count;
 } WGPUTextureViewDescriptor;
 
+#define WGPUBufferUsageFlags_INDEX 16
+
+#define WGPUBufferUsageFlags_MAP_READ 1
+
+#define WGPUBufferUsageFlags_MAP_WRITE 2
+
+#define WGPUBufferUsageFlags_NONE 0
+
+#define WGPUBufferUsageFlags_STORAGE 128
+
+#define WGPUBufferUsageFlags_TRANSFER_DST 8
+
+#define WGPUBufferUsageFlags_TRANSFER_SRC 4
+
+#define WGPUBufferUsageFlags_UNIFORM 64
+
+#define WGPUBufferUsageFlags_VERTEX 32
+
 #define WGPUColorWriteFlags_ALL 15
 
 #define WGPUColorWriteFlags_ALPHA 8
diff --git a/wgpu-native/src/resource.rs b/wgpu-native/src/resource.rs
index 9ed757b16..bfe0903e6 100644
--- a/wgpu-native/src/resource.rs
+++ b/wgpu-native/src/resource.rs
@@ -7,6 +7,7 @@ use hal;
 
 
 bitflags! {
+    #[repr(transparent)]
     pub struct BufferUsageFlags: u32 {
         const MAP_READ = 1;
         const MAP_WRITE = 2;