From de3134adbec9e35eba08dbb835c38bc305d2c150 Mon Sep 17 00:00:00 2001
From: riperiperi <rhy3756547@hotmail.com>
Date: Thu, 19 Jan 2023 00:30:42 +0000
Subject: Vulkan: Explicitly enable precise occlusion queries (#4292)

The only guarantee of the occlusion query type in Vulkan is that it will be zero when no samples pass, and non-zero when any samples pass. Of course, most GPUs implement this by just placing the # of samples in the result and calling it a day. However, this lax restriction means that GPUs could just report a boolean (1/0) or report a value after one is recorded, but before all samples have been counted.

MoltenVK falls in the first category - by default it only reports 1/0 for occlusion queries. Thankfully, there is a feature and flag that you can use to force compatible drivers to provide a "precise" query result, that being the real # of samples passed.

Should fix ink collision in Splatoon 2/3 on MoltenVK.
---
 Ryujinx.Graphics.Vulkan/HardwareCapabilities.cs | 3 +++
 1 file changed, 3 insertions(+)

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

diff --git a/Ryujinx.Graphics.Vulkan/HardwareCapabilities.cs b/Ryujinx.Graphics.Vulkan/HardwareCapabilities.cs
index 0a4d365f..8685d344 100644
--- a/Ryujinx.Graphics.Vulkan/HardwareCapabilities.cs
+++ b/Ryujinx.Graphics.Vulkan/HardwareCapabilities.cs
@@ -28,6 +28,7 @@ namespace Ryujinx.Graphics.Vulkan
         public readonly bool SupportsExtendedDynamicState;
         public readonly bool SupportsMultiView;
         public readonly bool SupportsNullDescriptors;
+        public readonly bool SupportsPreciseOcclusionQueries;
         public readonly bool SupportsPushDescriptors;
         public readonly bool SupportsTransformFeedback;
         public readonly bool SupportsTransformFeedbackQueries;
@@ -53,6 +54,7 @@ namespace Ryujinx.Graphics.Vulkan
             bool supportsPushDescriptors,
             bool supportsTransformFeedback,
             bool supportsTransformFeedbackQueries,
+            bool supportsPreciseOcclusionQueries,
             bool supportsGeometryShader,
             uint minSubgroupSize,
             uint maxSubgroupSize,
@@ -74,6 +76,7 @@ namespace Ryujinx.Graphics.Vulkan
             SupportsPushDescriptors = supportsPushDescriptors;
             SupportsTransformFeedback = supportsTransformFeedback;
             SupportsTransformFeedbackQueries = supportsTransformFeedbackQueries;
+            SupportsPreciseOcclusionQueries = supportsPreciseOcclusionQueries;
             SupportsGeometryShader = supportsGeometryShader;
             MinSubgroupSize = minSubgroupSize;
             MaxSubgroupSize = maxSubgroupSize;
-- 
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