Do not require null descriptors support

Ryujinx.Graphics.Vulkan/DescriptorSetCollection.cs

@@ -1,5 +1,6 @@
 using Silk.NET.Vulkan;
 using System;
+using VkBuffer = Silk.NET.Vulkan.Buffer;
 
 namespace Ryujinx.Graphics.Vulkan
 {
@@ -15,17 +16,15 @@ namespace Ryujinx.Graphics.Vulkan
             _descriptorSets = descriptorSets;
         }
 
-        public void InitializeBuffers(int setIndex, int baseBinding, int countPerUnit, DescriptorType type)
+        public void InitializeBuffers(int setIndex, int baseBinding, int countPerUnit, DescriptorType type, VkBuffer dummyBuffer)
         {
             Span<DescriptorBufferInfo> infos = stackalloc DescriptorBufferInfo[countPerUnit];
 
-            for (int j = 0; j < countPerUnit; j++)
+            infos.Fill(new DescriptorBufferInfo()
             {
-                infos[j] = new DescriptorBufferInfo()
+                Buffer = dummyBuffer,
-                {
+                Range = Vk.WholeSize
-                    Range = Vk.WholeSize
+            });
-                };
-            }
 
             UpdateBuffers(setIndex, baseBinding, infos, type);
         }

Ryujinx.Graphics.Vulkan/DescriptorSetUpdater.cs

@@ -45,6 +45,7 @@ namespace Ryujinx.Graphics.Vulkan
 
         private DirtyFlags _dirty;
 
+        private readonly BufferHolder _dummyBuffer;
         private readonly TextureView _dummyTexture;
         private readonly SamplerHolder _dummySampler;
 
@@ -62,6 +63,17 @@ namespace Ryujinx.Graphics.Vulkan
             _bufferTextures = Array.Empty<BufferView>();
             _bufferImages = Array.Empty<BufferView>();
 
+            if (gd.Capabilities.SupportsNullDescriptors)
+            {
+                // If null descriptors are supported, we can pass null as the handle.
+                _dummyBuffer = null;
+            }
+            else
+            {
+                // If null descriptors are not supported, we need to pass the handle of a dummy buffer on unused bindings.
+                _dummyBuffer = gd.BufferManager.Create(gd, 0x10000, forConditionalRendering: false, deviceLocal: true);
+            }
+
             _dummyTexture = (TextureView)gd.CreateTexture(new GAL.TextureCreateInfo(
                 1,
                 1,
@@ -283,13 +295,18 @@ namespace Ryujinx.Graphics.Vulkan
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        private static void UpdateBuffer(CommandBufferScoped cbs, ref DescriptorBufferInfo info, Auto<DisposableBuffer> buffer)
+        private static void UpdateBuffer(
+            CommandBufferScoped cbs,
+            ref DescriptorBufferInfo info,
+            Auto<DisposableBuffer> buffer,
+            Auto<DisposableBuffer> dummyBuffer)
         {
             info.Buffer = buffer?.Get(cbs, (int)info.Offset, (int)info.Range).Value ?? default;
 
             // The spec requires that buffers with null handle have offset as 0 and range as VK_WHOLE_SIZE.
             if (info.Buffer.Handle == 0)
             {
+                info.Buffer = dummyBuffer?.Get(cbs).Value ?? default;
                 info.Offset = 0;
                 info.Range = Vk.WholeSize;
             }
@@ -304,6 +321,8 @@ namespace Ryujinx.Graphics.Vulkan
                 return;
             }
 
+            var dummyBuffer = _dummyBuffer?.GetBuffer();
+
             var dsc = _program.GetNewDescriptorSetCollection(_gd, cbs.CommandBufferIndex, setIndex, out var isNew).Get(cbs);
 
             if (isNew)
@@ -352,7 +371,7 @@ namespace Ryujinx.Graphics.Vulkan
 
                         for (int i = 0; i < count; i++)
                         {
-                            UpdateBuffer(cbs, ref _uniformBuffers[binding + i], _uniformBufferRefs[binding + i]);
+                            UpdateBuffer(cbs, ref _uniformBuffers[binding + i], _uniformBufferRefs[binding + i], dummyBuffer);
                         }
 
                         ReadOnlySpan<DescriptorBufferInfo> uniformBuffers = _uniformBuffers;
@@ -369,7 +388,7 @@ namespace Ryujinx.Graphics.Vulkan
 
                         for (int i = 0; i < count; i++)
                         {
-                            UpdateBuffer(cbs, ref _storageBuffers[binding + i], _storageBufferRefs[binding + i]);
+                            UpdateBuffer(cbs, ref _storageBuffers[binding + i], _storageBufferRefs[binding + i], dummyBuffer);
                         }
 
                         ReadOnlySpan<DescriptorBufferInfo> storageBuffers = _storageBuffers;
@@ -461,6 +480,8 @@ namespace Ryujinx.Graphics.Vulkan
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         private void Initialize(CommandBufferScoped cbs, int setIndex, DescriptorSetCollection dsc)
         {
+            var dummyBuffer = _dummyBuffer?.GetBuffer().Get(cbs).Value ?? default;
+
             uint stages = _program.Stages;
 
             while (stages != 0)
@@ -470,11 +491,21 @@ namespace Ryujinx.Graphics.Vulkan
 
                 if (setIndex == PipelineBase.UniformSetIndex)
                 {
-                    dsc.InitializeBuffers(0, 1 + stage * Constants.MaxUniformBuffersPerStage, Constants.MaxUniformBuffersPerStage, DescriptorType.UniformBuffer);
+                    dsc.InitializeBuffers(
+                        0,
+                        1 + stage * Constants.MaxUniformBuffersPerStage,
+                        Constants.MaxUniformBuffersPerStage,
+                        DescriptorType.UniformBuffer,
+                        dummyBuffer);
                 }
                 else if (setIndex == PipelineBase.StorageSetIndex)
                 {
-                    dsc.InitializeBuffers(0, stage * Constants.MaxStorageBuffersPerStage, Constants.MaxStorageBuffersPerStage, DescriptorType.StorageBuffer);
+                    dsc.InitializeBuffers(
+                        0,
+                        stage * Constants.MaxStorageBuffersPerStage,
+                        Constants.MaxStorageBuffersPerStage,
+                        DescriptorType.StorageBuffer,
+                        dummyBuffer);
                 }
             }
         }

Ryujinx.Graphics.Vulkan/HardwareCapabilities.cs

@@ -6,6 +6,7 @@ namespace Ryujinx.Graphics.Vulkan
     {
         public bool SupportsConditionalRendering { get; }
         public bool SupportsExtendedDynamicState { get; }
+        public bool SupportsNullDescriptors { get; }
         public bool SupportsTransformFeedback { get; }
         public bool SupportsTransformFeedbackQueries { get; }
         public bool SupportsGeometryShader { get; }
@@ -16,6 +17,7 @@ namespace Ryujinx.Graphics.Vulkan
         public HardwareCapabilities(
             bool supportsConditionalRendering,
             bool supportsExtendedDynamicState,
+            bool supportsNullDescriptors,
             bool supportsTransformFeedback,
             bool supportsTransformFeedbackQueries,
             bool supportsGeometryShader,
@@ -25,6 +27,7 @@ namespace Ryujinx.Graphics.Vulkan
         {
             SupportsConditionalRendering = supportsConditionalRendering;
             SupportsExtendedDynamicState = supportsExtendedDynamicState;
+            SupportsNullDescriptors = supportsNullDescriptors;
             SupportsTransformFeedback = supportsTransformFeedback;
             SupportsTransformFeedbackQueries = supportsTransformFeedbackQueries;
             SupportsGeometryShader = supportsGeometryShader;

Ryujinx.Graphics.Vulkan/VulkanGraphicsDevice.cs

@@ -195,9 +195,27 @@ namespace Ryujinx.Graphics.Vulkan
 
             Api.GetPhysicalDeviceProperties2(_physicalDevice, &properties2);
 
+            PhysicalDeviceFeatures2 features2 = new PhysicalDeviceFeatures2()
+            {
+                SType = StructureType.PhysicalDeviceFeatures2
+            };
+
+            PhysicalDeviceRobustness2FeaturesEXT featuresRobustness2 = new PhysicalDeviceRobustness2FeaturesEXT()
+            {
+                SType = StructureType.PhysicalDeviceRobustness2FeaturesExt
+            };
+
+            if (supportedExtensions.Contains("VK_EXT_robustness2"))
+            {
+                features2.PNext = &featuresRobustness2;
+            }
+
+            Api.GetPhysicalDeviceFeatures2(_physicalDevice, &features2);
+
             Capabilities = new HardwareCapabilities(
                 supportedExtensions.Contains(ExtConditionalRendering.ExtensionName),
                 supportedExtensions.Contains(ExtExtendedDynamicState.ExtensionName),
+                featuresRobustness2.NullDescriptor,
                 supportsTransformFeedback,
                 propertiesTransformFeedback.TransformFeedbackQueries,
                 supportedFeatures.GeometryShader,
@@ -392,7 +410,7 @@ namespace Ryujinx.Graphics.Vulkan
         {
             uint driverVersionRaw = properties.DriverVersion;
 
-            // NVIDIA differ from the standard here and use a different format.
+            // NVIDIA differ from the standard here and uses a different format.
             if (properties.VendorID == 0x10DE)
             {
                 return $"{(driverVersionRaw >> 22) & 0x3FF}.{(driverVersionRaw >> 14) & 0xFF}.{(driverVersionRaw >> 6) & 0xFF}.{driverVersionRaw & 0x3F}";