From 0e13f583c777f401f5fb9301ceabd8f1b8aaaa19 Mon Sep 17 00:00:00 2001
From: saschawillems <webmaster@saschawillems.de>
Date: Sat, 4 Mar 2017 13:55:14 +0100
Subject: [PATCH] Flush memory if coherency flag is no set (Refs #273)

---
 base/VulkanDevice.hpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/base/VulkanDevice.hpp b/base/VulkanDevice.hpp
index dc115790..52d1f27f 100644
--- a/base/VulkanDevice.hpp
+++ b/base/VulkanDevice.hpp
@@ -368,6 +368,15 @@ namespace vks
 				void *mapped;
 				VK_CHECK_RESULT(vkMapMemory(logicalDevice, *memory, 0, size, 0, &mapped));
 				memcpy(mapped, data, size);
+				// If host coherency hasn't been requested, do a manual flush to make writes visible
+				if ((memoryPropertyFlags & VK_MEMORY_PROPERTY_HOST_COHERENT_BIT) == 0)
+				{
+					VkMappedMemoryRange mappedRange = vks::initializers::mappedMemoryRange();
+					mappedRange.memory = *memory;
+					mappedRange.offset = 0;
+					mappedRange.size = size;
+					vkFlushMappedMemoryRanges(logicalDevice, 1, &mappedRange);
+				}
 				vkUnmapMemory(logicalDevice, *memory);
 			}