From bb7d193ab2fc49540a905c9bd16e13c73ea35362 Mon Sep 17 00:00:00 2001
From: Erik Faye-Lund <erik.faye-lund@collabora.com>
Date: Wed, 10 Aug 2022 08:27:19 +0200
Subject: [PATCH] mesa: add format-helper for rgtc

Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Acked-by: Eric Engestrom <eric@igalia.com>
Tested-by: Eric Engestrom <eric@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18248>
---
 src/mesa/main/formats.c | 10 ++++++++++
 src/mesa/main/formats.h |  3 +++
 2 files changed, 13 insertions(+)

diff --git a/src/mesa/main/formats.c b/src/mesa/main/formats.c
index 19489e84648..f48c782a022 100644
--- a/src/mesa/main/formats.c
+++ b/src/mesa/main/formats.c
@@ -655,6 +655,16 @@ _mesa_is_format_s3tc(mesa_format format)
 }
 
 
+/**
+ * Return TRUE if format is an RGTC compressed format.
+ */
+bool
+_mesa_is_format_rgtc(mesa_format format)
+{
+   return _mesa_get_format_layout(format) == MESA_FORMAT_LAYOUT_RGTC;
+}
+
+
 /**
  * Return TRUE if format is an BPTC compressed format.
  */
diff --git a/src/mesa/main/formats.h b/src/mesa/main/formats.h
index e8f91389b93..acc69c1654d 100644
--- a/src/mesa/main/formats.h
+++ b/src/mesa/main/formats.h
@@ -698,6 +698,9 @@ _mesa_is_format_astc_2d(mesa_format format);
 bool
 _mesa_is_format_s3tc(mesa_format format);
 
+bool
+_mesa_is_format_rgtc(mesa_format format);
+
 bool
 _mesa_is_format_bptc(mesa_format format);