1 files changed, 260 insertions, 0 deletions
diff --git a/src/Ryujinx.Graphics.Gpu/Shader/ShaderInfoBuilder.cs b/src/Ryujinx.Graphics.Gpu/Shader/ShaderInfoBuilder.cs
new file mode 100644
index 00000000..39b31cf6
--- /dev/null
+++ b/src/Ryujinx.Graphics.Gpu/Shader/ShaderInfoBuilder.cs
@@ -0,0 +1,260 @@
+using Ryujinx.Graphics.GAL;
+using Ryujinx.Graphics.Shader;
+using System.Collections.Generic;
+
+namespace Ryujinx.Graphics.Gpu.Shader
+{
+    /// <summary>
+    /// Shader info structure builder.
+    /// </summary>
+    class ShaderInfoBuilder
+    {
+        private const int TotalSets = 4;
+
+        private const int UniformSetIndex = 0;
+        private const int StorageSetIndex = 1;
+        private const int TextureSetIndex = 2;
+        private const int ImageSetIndex = 3;
+
+        private const ResourceStages SupportBufferStags =
+            ResourceStages.Compute |
+            ResourceStages.Vertex |
+            ResourceStages.Fragment;
+
+        private readonly GpuContext _context;
+
+        private int _fragmentOutputMap;
+
+        private readonly List<ResourceDescriptor>[] _resourceDescriptors;
+        private readonly List<ResourceUsage>[] _resourceUsages;
+
+        /// <summary>
+        /// Creates a new shader info builder.
+        /// </summary>
+        /// <param name="context">GPU context that owns the shaders that will be added to the builder</param>
+        public ShaderInfoBuilder(GpuContext context)
+        {
+            _context = context;
+
+            _fragmentOutputMap = -1;
+
+            _resourceDescriptors = new List<ResourceDescriptor>[TotalSets];
+            _resourceUsages = new List<ResourceUsage>[TotalSets];
+
+            for (int index = 0; index < TotalSets; index++)
+            {
+                _resourceDescriptors[index] = new();
+                _resourceUsages[index] = new();
+            }
+
+            AddDescriptor(SupportBufferStags, ResourceType.UniformBuffer, UniformSetIndex, 0, 1);
+        }
+
+        /// <summary>
+        /// Adds information from a given shader stage.
+        /// </summary>
+        /// <param name="info">Shader stage information</param>
+        public void AddStageInfo(ShaderProgramInfo info)
+        {
+            if (info.Stage == ShaderStage.Fragment)
+            {
+                _fragmentOutputMap = info.FragmentOutputMap;
+            }
+
+            int stageIndex = GpuAccessorBase.GetStageIndex(info.Stage switch
+            {
+                ShaderStage.TessellationControl => 1,
+                ShaderStage.TessellationEvaluation => 2,
+                ShaderStage.Geometry => 3,
+                ShaderStage.Fragment => 4,
+                _ => 0
+            });
+
+            ResourceStages stages = info.Stage switch
+            {
+                ShaderStage.Compute => ResourceStages.Compute,
+                ShaderStage.Vertex => ResourceStages.Vertex,
+                ShaderStage.TessellationControl => ResourceStages.TessellationControl,
+                ShaderStage.TessellationEvaluation => ResourceStages.TessellationEvaluation,
+                ShaderStage.Geometry => ResourceStages.Geometry,
+                ShaderStage.Fragment => ResourceStages.Fragment,
+                _ => ResourceStages.None
+            };
+
+            int uniformsPerStage = (int)_context.Capabilities.MaximumUniformBuffersPerStage;
+            int storagesPerStage = (int)_context.Capabilities.MaximumStorageBuffersPerStage;
+            int texturesPerStage = (int)_context.Capabilities.MaximumTexturesPerStage;
+            int imagesPerStage = (int)_context.Capabilities.MaximumImagesPerStage;
+
+            int uniformBinding = 1 + stageIndex * uniformsPerStage;
+            int storageBinding = stageIndex * storagesPerStage;
+            int textureBinding = stageIndex * texturesPerStage * 2;
+            int imageBinding = stageIndex * imagesPerStage * 2;
+
+            AddDescriptor(stages, ResourceType.UniformBuffer, UniformSetIndex, uniformBinding, uniformsPerStage);
+            AddArrayDescriptor(stages, ResourceType.StorageBuffer, StorageSetIndex, storageBinding, storagesPerStage);
+            AddDualDescriptor(stages, ResourceType.TextureAndSampler, ResourceType.BufferTexture, TextureSetIndex, textureBinding, texturesPerStage);
+            AddDualDescriptor(stages, ResourceType.Image, ResourceType.BufferImage, ImageSetIndex, imageBinding, imagesPerStage);
+
+            AddUsage(info.CBuffers, stages, UniformSetIndex, isStorage: false);
+            AddUsage(info.SBuffers, stages, StorageSetIndex, isStorage: true);
+            AddUsage(info.Textures, stages, TextureSetIndex, isImage: false);
+            AddUsage(info.Images, stages, ImageSetIndex, isImage: true);
+        }
+
+        /// <summary>
+        /// Adds a resource descriptor to the list of descriptors.
+        /// </summary>
+        /// <param name="stages">Shader stages where the resource is used</param>
+        /// <param name="type">Type of the resource</param>
+        /// <param name="setIndex">Descriptor set number where the resource will be bound</param>
+        /// <param name="binding">Binding number where the resource will be bound</param>
+        /// <param name="count">Number of resources bound at the binding location</param>
+        private void AddDescriptor(ResourceStages stages, ResourceType type, int setIndex, int binding, int count)
+        {
+            for (int index = 0; index < count; index++)
+            {
+                _resourceDescriptors[setIndex].Add(new ResourceDescriptor(binding + index, 1, type, stages));
+            }
+        }
+
+        /// <summary>
+        /// Adds two interleaved groups of resources to the list of descriptors.
+        /// </summary>
+        /// <param name="stages">Shader stages where the resource is used</param>
+        /// <param name="type">Type of the first interleaved resource</param>
+        /// <param name="type2">Type of the second interleaved resource</param>
+        /// <param name="setIndex">Descriptor set number where the resource will be bound</param>
+        /// <param name="binding">Binding number where the resource will be bound</param>
+        /// <param name="count">Number of resources bound at the binding location</param>
+        private void AddDualDescriptor(ResourceStages stages, ResourceType type, ResourceType type2, int setIndex, int binding, int count)
+        {
+            AddDescriptor(stages, type, setIndex, binding, count);
+            AddDescriptor(stages, type2, setIndex, binding + count, count);
+        }
+
+        /// <summary>
+        /// Adds an array resource to the list of descriptors.
+        /// </summary>
+        /// <param name="stages">Shader stages where the resource is used</param>
+        /// <param name="type">Type of the resource</param>
+        /// <param name="setIndex">Descriptor set number where the resource will be bound</param>
+        /// <param name="binding">Binding number where the resource will be bound</param>
+        /// <param name="count">Number of resources bound at the binding location</param>
+        private void AddArrayDescriptor(ResourceStages stages, ResourceType type, int setIndex, int binding, int count)
+        {
+            _resourceDescriptors[setIndex].Add(new ResourceDescriptor(binding, count, type, stages));
+        }
+
+        /// <summary>
+        /// Adds buffer usage information to the list of usages.
+        /// </summary>
+        /// <param name="buffers">Buffers to be added</param>
+        /// <param name="stages">Stages where the buffers are used</param>
+        /// <param name="setIndex">Descriptor set index where the buffers will be bound</param>
+        /// <param name="isStorage">True for storage buffers, false for uniform buffers</param>
+        private void AddUsage(IEnumerable<BufferDescriptor> buffers, ResourceStages stages, int setIndex, bool isStorage)
+        {
+            foreach (BufferDescriptor buffer in buffers)
+            {
+                _resourceUsages[setIndex].Add(new ResourceUsage(
+                    buffer.Binding,
+                    isStorage ? ResourceType.StorageBuffer : ResourceType.UniformBuffer,
+                    stages,
+                    buffer.Flags.HasFlag(BufferUsageFlags.Write) ? ResourceAccess.ReadWrite : ResourceAccess.Read));
+            }
+        }
+
+        /// <summary>
+        /// Adds texture usage information to the list of usages.
+        /// </summary>
+        /// <param name="textures">Textures to be added</param>
+        /// <param name="stages">Stages where the textures are used</param>
+        /// <param name="setIndex">Descriptor set index where the textures will be bound</param>
+        /// <param name="isImage">True for images, false for textures</param>
+        private void AddUsage(IEnumerable<TextureDescriptor> textures, ResourceStages stages, int setIndex, bool isImage)
+        {
+            foreach (TextureDescriptor texture in textures)
+            {
+                bool isBuffer = (texture.Type & SamplerType.Mask) == SamplerType.TextureBuffer;
+
+                ResourceType type = isBuffer
+                    ? (isImage ? ResourceType.BufferImage : ResourceType.BufferTexture)
+                    : (isImage ? ResourceType.Image : ResourceType.TextureAndSampler);
+
+                _resourceUsages[setIndex].Add(new ResourceUsage(
+                    texture.Binding,
+                    type,
+                    stages,
+                    texture.Flags.HasFlag(TextureUsageFlags.ImageStore) ? ResourceAccess.ReadWrite : ResourceAccess.Read));
+            }
+        }
+
+        /// <summary>
+        /// Creates a new shader information structure from the added information.
+        /// </summary>
+        /// <param name="pipeline">Optional pipeline state for background shader compilation</param>
+        /// <param name="fromCache">Indicates if the shader comes from a disk cache</param>
+        /// <returns>Shader information</returns>
+        public ShaderInfo Build(ProgramPipelineState? pipeline, bool fromCache = false)
+        {
+            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());
+            }
+
+            ResourceLayout resourceLayout = new ResourceLayout(descriptors.AsReadOnly(), usages.AsReadOnly());
+
+            if (pipeline.HasValue)
+            {
+                return new ShaderInfo(_fragmentOutputMap, resourceLayout, pipeline.Value, fromCache);
+            }
+            else
+            {
+                return new ShaderInfo(_fragmentOutputMap, resourceLayout, fromCache);
+            }
+        }
+
+        /// <summary>
+        /// Builds shader information for shaders from the disk cache.
+        /// </summary>
+        /// <param name="context">GPU context that owns the shaders</param>
+        /// <param name="programs">Shaders from the disk cache</param>
+        /// <param name="pipeline">Optional pipeline for background compilation</param>
+        /// <returns>Shader information</returns>
+        public static ShaderInfo BuildForCache(GpuContext context, IEnumerable<CachedShaderStage> programs, ProgramPipelineState? pipeline)
+        {
+            ShaderInfoBuilder builder = new ShaderInfoBuilder(context);
+
+            foreach (CachedShaderStage program in programs)
+            {
+                if (program?.Info != null)
+                {
+                    builder.AddStageInfo(program.Info);
+                }
+            }
+
+            return builder.Build(pipeline, fromCache: true);
+        }
+
+        /// <summary>
+        /// Builds shader information for a compute shader.
+        /// </summary>
+        /// <param name="context">GPU context that owns the shader</param>
+        /// <param name="info">Compute shader information</param>
+        /// <param name="fromCache">True if the compute shader comes from a disk cache, false otherwise</param>
+        /// <returns>Shader information</returns>
+        public static ShaderInfo BuildForCompute(GpuContext context, ShaderProgramInfo info, bool fromCache = false)
+        {
+            ShaderInfoBuilder builder = new ShaderInfoBuilder(context);
+
+            builder.AddStageInfo(info);
+
+            return builder.Build(null, fromCache);
+        }
+    }
+}
+\ No newline at end of file