vulkan: Respect VK_KHR_portability_subset vertex stride alignment (#4419)

* vulkan: Respect VK_KHR_portability_subset vertex stride alignment

We were hardcoding alignment to 4, but by specs it can be any values that
is a power of 2.

This also enable VK_KHR_portability_subset if present as per specs
requirements.

* address gdkchan's comment

* Make NeedsVertexBufferAlignment internal

Ryujinx.Graphics.Vulkan/HardwareCapabilities.cs

@@ -8,11 +8,10 @@ namespace Ryujinx.Graphics.Vulkan
     {
         None = 0,
 
-        VertexBufferAlignment4B = 1,
-        NoTriangleFans = 1 << 1,
-        NoPointMode = 1 << 2,
-        No3DImageView = 1 << 3,
-        NoLodBias = 1 << 4
+        NoTriangleFans = 1,
+        NoPointMode = 1 << 1,
+        No3DImageView = 1 << 2,
+        NoLodBias = 1 << 3
     }
 
     readonly struct HardwareCapabilities
@@ -40,6 +39,7 @@ namespace Ryujinx.Graphics.Vulkan
         public readonly ShaderStageFlags RequiredSubgroupSizeStages;
         public readonly SampleCountFlags SupportedSampleCounts;
         public readonly PortabilitySubsetFlags PortabilitySubset;
+        public readonly uint VertexBufferAlignment;
 
         public HardwareCapabilities(
             bool supportsIndexTypeUint8,
@@ -64,7 +64,8 @@ namespace Ryujinx.Graphics.Vulkan
             uint maxSubgroupSize,
             ShaderStageFlags requiredSubgroupSizeStages,
             SampleCountFlags supportedSampleCounts,
-            PortabilitySubsetFlags portabilitySubset)
+            PortabilitySubsetFlags portabilitySubset,
+            uint vertexBufferAlignment)
         {
             SupportsIndexTypeUint8 = supportsIndexTypeUint8;
             SupportsCustomBorderColor = supportsCustomBorderColor;
@@ -89,6 +90,7 @@ namespace Ryujinx.Graphics.Vulkan
             RequiredSubgroupSizeStages = requiredSubgroupSizeStages;
             SupportedSampleCounts = supportedSampleCounts;
             PortabilitySubset = portabilitySubset;
+            VertexBufferAlignment = vertexBufferAlignment;
         }
     }
 }

Ryujinx.Graphics.Vulkan/PipelineBase.cs

@@ -1,4 +1,5 @@
-using Ryujinx.Graphics.GAL;
+using Ryujinx.Common;
+using Ryujinx.Graphics.GAL;
 using Ryujinx.Graphics.Shader;
 using Silk.NET.Vulkan;
 using System;
@@ -1136,7 +1137,7 @@ namespace Ryujinx.Graphics.Vulkan
 
                         buffer.Dispose();
 
-                        if (!Gd.Capabilities.PortabilitySubset.HasFlag(PortabilitySubsetFlags.VertexBufferAlignment4B) &&
+                        if (Gd.Capabilities.VertexBufferAlignment < 2 &&
                             (vertexBuffer.Stride % FormatExtensions.MaxBufferFormatScalarSize) == 0)
                         {
                             buffer = new VertexBufferState(

Ryujinx.Graphics.Vulkan/PipelineConverter.cs

@@ -1,4 +1,5 @@
-using Ryujinx.Graphics.GAL;
+using Ryujinx.Common;
+using Ryujinx.Graphics.GAL;
 using Silk.NET.Vulkan;
 using System;
 
@@ -253,7 +254,7 @@ namespace Ryujinx.Graphics.Vulkan
 
                     if (gd.NeedsVertexBufferAlignment(vbScalarSizes[i], out int alignment))
                     {
-                        alignedStride = (vertexBuffer.Stride + (alignment - 1)) & -alignment;
+                        alignedStride = BitUtils.AlignUp(vertexBuffer.Stride, alignment);
                     }
 
                     // TODO: Support divisor > 1

Ryujinx.Graphics.Vulkan/VulkanInitialization.cs

@@ -36,7 +36,8 @@ namespace Ryujinx.Graphics.Vulkan
             "VK_KHR_shader_float16_int8",
             "VK_EXT_shader_subgroup_ballot",
             "VK_EXT_subgroup_size_control",
-            "VK_NV_geometry_shader_passthrough"
+            "VK_NV_geometry_shader_passthrough",
+            "VK_KHR_portability_subset", // By spec, we should enable this if present.
         };
 
         public static string[] RequiredExtensions { get; } = new string[]

Ryujinx.Graphics.Vulkan/VulkanRenderer.cs

@@ -234,10 +234,12 @@ namespace Ryujinx.Graphics.Vulkan
             Api.GetPhysicalDeviceFeatures2(_physicalDevice, &features2);
 
             var portabilityFlags = PortabilitySubsetFlags.None;
+            uint vertexBufferAlignment = 1;
 
             if (usePortability)
             {
-                portabilityFlags |= propertiesPortabilitySubset.MinVertexInputBindingStrideAlignment > 1 ? PortabilitySubsetFlags.VertexBufferAlignment4B : 0;
+                vertexBufferAlignment = propertiesPortabilitySubset.MinVertexInputBindingStrideAlignment;
+
                 portabilityFlags |= featuresPortabilitySubset.TriangleFans ? 0 : PortabilitySubsetFlags.NoTriangleFans;
                 portabilityFlags |= featuresPortabilitySubset.PointPolygons ? 0 : PortabilitySubsetFlags.NoPointMode;
                 portabilityFlags |= featuresPortabilitySubset.ImageView2DOn3DImage ? 0 : PortabilitySubsetFlags.No3DImageView;
@@ -278,7 +280,8 @@ namespace Ryujinx.Graphics.Vulkan
                 propertiesSubgroupSizeControl.MaxSubgroupSize,
                 propertiesSubgroupSizeControl.RequiredSubgroupSizeStages,
                 supportedSampleCounts,
-                portabilityFlags);
+                portabilityFlags,
+                vertexBufferAlignment);
 
             MemoryAllocator = new MemoryAllocator(Api, _physicalDevice, _device, properties.Limits.MaxMemoryAllocationCount);
 
@@ -636,11 +639,11 @@ namespace Ryujinx.Graphics.Vulkan
             PrintGpuInformation();
         }
 
-        public bool NeedsVertexBufferAlignment(int attrScalarAlignment, out int alignment)
+        internal bool NeedsVertexBufferAlignment(int attrScalarAlignment, out int alignment)
         {
-            if (Capabilities.PortabilitySubset.HasFlag(PortabilitySubsetFlags.VertexBufferAlignment4B))
+            if (Capabilities.VertexBufferAlignment > 1)
             {
-                alignment = 4;
+                alignment = (int)Capabilities.VertexBufferAlignment;
 
                 return true;
             }