From 1fbec9f5323bbc3d503aea4b391b82afb0c26831 Mon Sep 17 00:00:00 2001
From: Erik Faye-Lund <erik.faye-lund@collabora.com>
Date: Wed, 15 Nov 2023 10:09:36 +0100
Subject: [PATCH] util/format: document NONE swizzle
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Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/26192>
---
 src/util/format/u_formats.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/util/format/u_formats.h b/src/util/format/u_formats.h
index a48b124002a..1247cf05182 100644
--- a/src/util/format/u_formats.h
+++ b/src/util/format/u_formats.h
@@ -667,7 +667,10 @@ enum pipe_swizzle {
    PIPE_SWIZZLE_W,
    PIPE_SWIZZLE_0,
    PIPE_SWIZZLE_1,
+
+   /* Non-existent format channel, not used for swizzle operations. */
    PIPE_SWIZZLE_NONE,
+
    PIPE_SWIZZLE_MAX, /**< Number of enums counter (must be last) */
 };