From dca5b14493e730960ed5cd67906278ecea969b3a Mon Sep 17 00:00:00 2001
From: gdkchan <gab.dark.100@gmail.com>
Date: Fri, 13 Jan 2023 02:09:48 -0300
Subject: Relax Vulkan requirements (#4228)

---
 Ryujinx.Graphics.Vulkan/Window.cs | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

(limited to 'Ryujinx.Graphics.Vulkan/Window.cs')

diff --git a/Ryujinx.Graphics.Vulkan/Window.cs b/Ryujinx.Graphics.Vulkan/Window.cs
index d37dd7e9..27ebb0de 100644
--- a/Ryujinx.Graphics.Vulkan/Window.cs
+++ b/Ryujinx.Graphics.Vulkan/Window.cs
@@ -113,7 +113,7 @@ namespace Ryujinx.Graphics.Vulkan
                 ImageSharingMode = SharingMode.Exclusive,
                 ImageArrayLayers = 1,
                 PreTransform = capabilities.CurrentTransform,
-                CompositeAlpha = CompositeAlphaFlagsKHR.OpaqueBitKhr,
+                CompositeAlpha = ChooseCompositeAlpha(capabilities.SupportedCompositeAlpha),
                 PresentMode = ChooseSwapPresentMode(presentModes, _vsyncEnabled),
                 Clipped = true,
                 OldSwapchain = oldSwapchain
@@ -182,6 +182,22 @@ namespace Ryujinx.Graphics.Vulkan
             return availableFormats[0];
         }
 
+        private static CompositeAlphaFlagsKHR ChooseCompositeAlpha(CompositeAlphaFlagsKHR supportedFlags)
+        {
+            if (supportedFlags.HasFlag(CompositeAlphaFlagsKHR.OpaqueBitKhr))
+            {
+                return CompositeAlphaFlagsKHR.OpaqueBitKhr;
+            }
+            else if (supportedFlags.HasFlag(CompositeAlphaFlagsKHR.PreMultipliedBitKhr))
+            {
+                return CompositeAlphaFlagsKHR.PreMultipliedBitKhr;
+            }
+            else
+            {
+                return CompositeAlphaFlagsKHR.InheritBitKhr;
+            }
+        }
+
         private static PresentModeKHR ChooseSwapPresentMode(PresentModeKHR[] availablePresentModes, bool vsyncEnabled)
         {
             if (!vsyncEnabled && availablePresentModes.Contains(PresentModeKHR.ImmediateKhr))
@@ -192,10 +208,6 @@ namespace Ryujinx.Graphics.Vulkan
             {
                 return PresentModeKHR.MailboxKhr;
             }
-            else if (availablePresentModes.Contains(PresentModeKHR.FifoKhr))
-            {
-               return PresentModeKHR.FifoKhr;
-            }
             else
             {
                 return PresentModeKHR.FifoKhr;
-- 
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