From b733fcb3370fa6a80d461764aeaecf07f8ed6d10 Mon Sep 17 00:00:00 2001
From: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Date: Thu, 6 Jul 2023 08:58:54 -0400
Subject: [PATCH] vulkan: Add vk_index_type_to_bytes helper

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Reviewed-by: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Reviewed-by: Faith Ekstrand <faith.ekstrand@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24017>
---
 src/vulkan/util/vk_util.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/vulkan/util/vk_util.h b/src/vulkan/util/vk_util.h
index b1a65c1b8b7..d30e8ad007d 100644
--- a/src/vulkan/util/vk_util.h
+++ b/src/vulkan/util/vk_util.h
@@ -366,6 +366,18 @@ vk_spec_info_to_nir_spirv(const VkSpecializationInfo *spec_info,
 #define STACK_ARRAY_FINISH(name) \
    if (name != _stack_##name) free(name)
 
+static inline uint8_t
+vk_index_type_to_bytes(enum VkIndexType type)
+{
+   switch (type) {
+   case VK_INDEX_TYPE_NONE_KHR:  return 0;
+   case VK_INDEX_TYPE_UINT8_EXT: return 1;
+   case VK_INDEX_TYPE_UINT16:    return 2;
+   case VK_INDEX_TYPE_UINT32:    return 4;
+   default:                      unreachable("Invalid index type");
+   }
+}
+
 #ifdef __cplusplus
 }
 #endif