From 9b28403d9d90307ab38c3afc3cc6a3d8ac4b7fdc Mon Sep 17 00:00:00 2001
From: Stephen Gutekanst <stephen@hexops.com>
Date: Sun, 24 Jul 2022 14:46:38 -0700
Subject: [PATCH] gpu: convert BindGroup from enum(usize) to *opaque

Signed-off-by: Stephen Gutekanst <stephen@hexops.com>
---
 gpu/src/bind_group.zig | 39 +++++++++++++++++----------------------
 1 file changed, 17 insertions(+), 22 deletions(-)

diff --git a/gpu/src/bind_group.zig b/gpu/src/bind_group.zig
index 34832b3f..038fde03 100644
--- a/gpu/src/bind_group.zig
+++ b/gpu/src/bind_group.zig
@@ -4,27 +4,22 @@ const TextureView = @import("texture_view.zig").TextureView;
 const ChainedStruct = @import("types.zig").ChainedStruct;
 const BindGroupLayout = @import("bind_group_layout.zig").BindGroupLayout;
 
-pub const BindGroup = enum(usize) {
-    _,
+pub const BindGroup = *opaque {};
 
-    // TODO: verify there is a use case for nullable value of this type.
-    pub const none: BindGroup = @intToEnum(BindGroup, 0);
-
-    pub const Entry = extern struct {
-        next_in_chain: *const ChainedStruct,
-        binding: u32,
-        buffer: Buffer = Buffer.none, // nullable
-        offset: u64,
-        size: u64,
-        sampler: Sampler = Sampler.none, // nullable
-        texture_view: TextureView = TextureView.none, // nullable
-    };
-
-    pub const Descriptor = extern struct {
-        next_in_chain: *const ChainedStruct,
-        label: ?[*:0]const u8 = null,
-        layout: BindGroupLayout,
-        entry_count: u32,
-        entries: [*]const Entry,
-    };
+pub const BindGroupEntry = extern struct {
+    next_in_chain: *const ChainedStruct,
+    binding: u32,
+    buffer: Buffer = Buffer.none, // nullable
+    offset: u64,
+    size: u64,
+    sampler: Sampler = Sampler.none, // nullable
+    texture_view: TextureView = TextureView.none, // nullable
+};
+
+pub const BindGroupDescriptor = extern struct {
+    next_in_chain: *const ChainedStruct,
+    label: ?[*:0]const u8 = null,
+    layout: BindGroupLayout,
+    entry_count: u32,
+    entries: [*]const BindGroupEntry,
 };