From df6bb48766c28b91401ea8fe0981a67fd37b3ef9 Mon Sep 17 00:00:00 2001
From: Christoph Haag <haagch+git@frickel.club>
Date: Tue, 31 Jan 2017 15:51:33 +0100
Subject: [PATCH] explicitely choose VK_FORMAT_B8G8R8A8_UNORM

if it's not available, select the first available color format
---
 base/vulkanswapchain.hpp | 27 ++++++++++++++++++++++-----
 1 file changed, 22 insertions(+), 5 deletions(-)

diff --git a/base/vulkanswapchain.hpp b/base/vulkanswapchain.hpp
index fe4f1ea7..1da64a20 100644
--- a/base/vulkanswapchain.hpp
+++ b/base/vulkanswapchain.hpp
@@ -225,16 +225,33 @@ public:
 		if ((formatCount == 1) && (surfaceFormats[0].format == VK_FORMAT_UNDEFINED))
 		{
 			colorFormat = VK_FORMAT_B8G8R8A8_UNORM;
+			colorSpace = surfaceFormats[0].colorSpace;
 		}
 		else
 		{
-			// Always select the first available color format
-			// If you need a specific format (e.g. SRGB) you'd need to
 			// iterate over the list of available surface format and
-			// check for it's presence
-			colorFormat = surfaceFormats[0].format;
+			// check for the presence of VK_FORMAT_B8G8R8A8_UNORM
+			bool found_B8G8R8A8_UNORM = false;
+			for (auto&& surfaceFormat : surfaceFormats)
+			{
+				if (surfaceFormat.format == VK_FORMAT_B8G8R8A8_UNORM)
+				{
+					colorFormat = surfaceFormat.format;
+					colorSpace = surfaceFormat.colorSpace;
+					found_B8G8R8A8_UNORM = true;
+					break;
+				}
+			}
+
+			// in case VK_FORMAT_B8G8R8A8_UNORM is not available
+			// select the first available color format
+			if (!found_B8G8R8A8_UNORM)
+			{
+				colorFormat = surfaceFormats[0].format;
+				colorSpace = surfaceFormats[0].colorSpace;
+			}
 		}
-		colorSpace = surfaceFormats[0].colorSpace;
+
 	}
 
 	/**