From c09beb9efbbba32777acc3a44c6a2cfeab6db932 Mon Sep 17 00:00:00 2001
From: Lubosz Sarnecki <lubosz.sarnecki@collabora.com>
Date: Wed, 6 May 2020 12:41:46 +0200
Subject: [PATCH] aux/vk: Add vk_get_access_flags.

---
 src/xrt/auxiliary/vk/vk_helpers.c | 26 ++++++++++++++++++++++++++
 src/xrt/auxiliary/vk/vk_helpers.h |  3 +++
 2 files changed, 29 insertions(+)

diff --git a/src/xrt/auxiliary/vk/vk_helpers.c b/src/xrt/auxiliary/vk/vk_helpers.c
index 6accee877..629302985 100644
--- a/src/xrt/auxiliary/vk/vk_helpers.c
+++ b/src/xrt/auxiliary/vk/vk_helpers.c
@@ -1055,3 +1055,29 @@ err_memset:
 	U_ZERO(vk);
 	return ret;
 }
+
+VkAccessFlags
+vk_get_access_flags(VkImageLayout layout)
+{
+	switch (layout) {
+	case VK_IMAGE_LAYOUT_UNDEFINED: return 0;
+	case VK_IMAGE_LAYOUT_GENERAL:
+		return VK_ACCESS_TRANSFER_WRITE_BIT |
+		       VK_ACCESS_TRANSFER_READ_BIT;
+	case VK_IMAGE_LAYOUT_PREINITIALIZED: return VK_ACCESS_HOST_WRITE_BIT;
+	case VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL:
+		return VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
+	case VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL:
+		return VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_WRITE_BIT;
+	case VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL:
+		return VK_ACCESS_TRANSFER_READ_BIT;
+	case VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL:
+		return VK_ACCESS_TRANSFER_WRITE_BIT;
+	case VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL:
+		return VK_ACCESS_SHADER_READ_BIT;
+	default:
+		fprintf(stderr, "Unhandled access mask case for layout %d.\n",
+		        layout);
+	}
+	return 0;
+}
diff --git a/src/xrt/auxiliary/vk/vk_helpers.h b/src/xrt/auxiliary/vk/vk_helpers.h
index c5374b567..ff04227df 100644
--- a/src/xrt/auxiliary/vk/vk_helpers.h
+++ b/src/xrt/auxiliary/vk/vk_helpers.h
@@ -399,6 +399,9 @@ VkResult
 vk_submit_cmd_buffer(struct vk_bundle *vk, VkCommandBuffer cmd_buffer);
 
 
+VkAccessFlags
+vk_get_access_flags(VkImageLayout layout);
+
 #ifdef __cplusplus
 }
 #endif