From 093be3aa534d71c7c4dad17f23aa45d07a6498dc Mon Sep 17 00:00:00 2001
From: Stephen Gutekanst <stephen@hexops.com>
Date: Tue, 16 Aug 2022 19:32:45 -0700
Subject: [PATCH] gpu: add CompilationInfo.getMessages slice helper

Signed-off-by: Stephen Gutekanst <stephen@hexops.com>
---
 gpu/README.md     | 1 +
 gpu/src/types.zig | 9 ++++++++-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/gpu/README.md b/gpu/README.md
index dcbcbc09..5fdfcb54 100644
--- a/gpu/README.md
+++ b/gpu/README.md
@@ -180,6 +180,7 @@ And, to initialize data structures with slices in them, the following helpers ar
 * `VertexBufferLayout.init`
 * `VertexState.init`
 * `FragmentState.init`
+* `CompilationInfo.getMessages`
 
 ### Typed callbacks
 
diff --git a/gpu/src/types.zig b/gpu/src/types.zig
index 029a6bfe..a9fd22ba 100644
--- a/gpu/src/types.zig
+++ b/gpu/src/types.zig
@@ -618,9 +618,16 @@ pub const BlendState = extern struct {
 
 pub const CompilationInfo = extern struct {
     next_in_chain: ?*const ChainedStruct = null,
-    // TODO: slice helper
     message_count: u32,
     messages: ?[*]const CompilationMessage = null,
+
+    /// Helper to get messages as a slice.
+    pub fn getMessages(info: CompilationInfo) ?[]const CompilationMessage {
+        if (info.messages) |messages| {
+            return messages[0..info.message_count];
+        }
+        return null;
+    }
 };
 
 pub const DepthStencilState = extern struct {