Metal: Better Bindings (#29)

* Tell GAL to use Vk model (and break everything)

* ResourceBindingSegments

* Set information on backend caps

* Get ready to break everything

* Refactor EncoderStateManager

* Remove padding from helper shaders

* Fix ref array sizes

* Seperate vert & frag buffers

* Shader-side changes

* Fixes

* Fix some helper shader resource layouts

* Sort by binding id

* Fix helper shader layouts

* Don’t do inline vertex buffer updates

* Check for null storage

src/Ryujinx.Graphics.Metal/ResourceLayoutBuilder.cs

@@ -0,0 +1,59 @@
+using Ryujinx.Graphics.GAL;
+using System;
+using System.Collections.Generic;
+using System.Runtime.Versioning;
+
+namespace Ryujinx.Graphics.Metal
+{
+    [SupportedOSPlatform("macos")]
+    class ResourceLayoutBuilder
+    {
+        private const int TotalSets = MetalRenderer.TotalSets;
+
+        private readonly List<ResourceDescriptor>[] _resourceDescriptors;
+        private readonly List<ResourceUsage>[] _resourceUsages;
+
+        public ResourceLayoutBuilder()
+        {
+            _resourceDescriptors = new List<ResourceDescriptor>[TotalSets];
+            _resourceUsages = new List<ResourceUsage>[TotalSets];
+
+            for (int index = 0; index < TotalSets; index++)
+            {
+                _resourceDescriptors[index] = new();
+                _resourceUsages[index] = new();
+            }
+        }
+
+        public ResourceLayoutBuilder Add(ResourceStages stages, ResourceType type, int binding)
+        {
+            int setIndex = type switch
+            {
+                ResourceType.UniformBuffer => MetalRenderer.UniformSetIndex,
+                ResourceType.StorageBuffer => MetalRenderer.StorageSetIndex,
+                ResourceType.TextureAndSampler or ResourceType.BufferTexture => MetalRenderer.TextureSetIndex,
+                ResourceType.Image or ResourceType.BufferImage => MetalRenderer.ImageSetIndex,
+                _ => throw new ArgumentException($"Invalid resource type \"{type}\"."),
+            };
+
+            _resourceDescriptors[setIndex].Add(new ResourceDescriptor(binding, 1, type, stages));
+            _resourceUsages[setIndex].Add(new ResourceUsage(binding, 1, type, stages));
+
+            return this;
+        }
+
+        public ResourceLayout Build()
+        {
+            var descriptors = new ResourceDescriptorCollection[TotalSets];
+            var usages = new ResourceUsageCollection[TotalSets];
+
+            for (int index = 0; index < TotalSets; index++)
+            {
+                descriptors[index] = new ResourceDescriptorCollection(_resourceDescriptors[index].ToArray().AsReadOnly());
+                usages[index] = new ResourceUsageCollection(_resourceUsages[index].ToArray().AsReadOnly());
+            }
+
+            return new ResourceLayout(descriptors.AsReadOnly(), usages.AsReadOnly());
+        }
+    }
+}