Add Support for Post Processing Effects (#3616)

* Add Post Processing Effects

* fix events and shader issues

* fix gtk upscale slider value

* fix bgra games

* don't swap swizzle if already swapped

* restore opengl texture state after effects run

* addressed review

* use single pipeline for smaa and fsr

* call finish on all pipelines

* addressed review

* attempt fix file case

* attempt fixing file case

* fix filter level tick frequency

* adjust filter slider margins

* replace fxaa shaders with original shader

* addressed review

1 files changed, 208 insertions, 0 deletions

diff --git a/Ryujinx.Graphics.Vulkan/Effects/FsrScalingFilter.cs b/Ryujinx.Graphics.Vulkan/Effects/FsrScalingFilter.cs
new file mode 100644
index 00000000..a1207059
--- /dev/null
+++ b/Ryujinx.Graphics.Vulkan/Effects/FsrScalingFilter.cs
@@ -0,0 +1,208 @@
+using Ryujinx.Common;
+using Ryujinx.Graphics.GAL;
+using Ryujinx.Graphics.Shader;
+using Ryujinx.Graphics.Shader.Translation;
+using Silk.NET.Vulkan;
+using System;
+using Extent2D = Ryujinx.Graphics.GAL.Extents2D;
+
+namespace Ryujinx.Graphics.Vulkan.Effects
+{
+    internal partial class FsrScalingFilter : IScalingFilter
+    {
+        private readonly VulkanRenderer _renderer;
+        private PipelineHelperShader _pipeline;
+        private ISampler _sampler;
+        private ShaderCollection _scalingProgram;
+        private ShaderCollection _sharpeningProgram;
+        private float _sharpeningLevel = 1;
+        private Device _device;
+        private TextureView _intermediaryTexture;
+
+        public float Level
+        {
+            get => _sharpeningLevel;
+            set
+            {
+                _sharpeningLevel = MathF.Max(0.01f, value);
+            }
+        }
+
+        public FsrScalingFilter(VulkanRenderer renderer, Device device)
+        {
+            _device = device;
+            _renderer = renderer;
+
+            Initialize();
+        }
+
+        public void Dispose()
+        {
+            _pipeline.Dispose();
+            _scalingProgram.Dispose();
+            _sharpeningProgram.Dispose();
+            _sampler.Dispose();
+            _intermediaryTexture?.Dispose();
+        }
+
+        public void Initialize()
+        {
+            _pipeline = new PipelineHelperShader(_renderer, _device);
+
+            _pipeline.Initialize();
+
+            var scalingShader = EmbeddedResources.Read("Ryujinx.Graphics.Vulkan/Effects/Shaders/FsrScaling.spv");
+            var sharpeningShader = EmbeddedResources.Read("Ryujinx.Graphics.Vulkan/Effects/Shaders/FsrSharpening.spv");
+
+            var computeBindings = new ShaderBindings(
+                new[] { 2 },
+                Array.Empty<int>(),
+                new[] { 1 },
+                new[] { 0 });
+
+            var sharpeningBindings = new ShaderBindings(
+                new[] { 2, 3, 4 },
+                Array.Empty<int>(),
+                new[] { 1 },
+                new[] { 0 });
+
+            _sampler = _renderer.CreateSampler(GAL.SamplerCreateInfo.Create(MinFilter.Linear, MagFilter.Linear));
+
+            _scalingProgram = _renderer.CreateProgramWithMinimalLayout(new[]
+            {
+                new ShaderSource(scalingShader, computeBindings, ShaderStage.Compute, TargetLanguage.Spirv)
+            });
+
+            _sharpeningProgram = _renderer.CreateProgramWithMinimalLayout(new[]
+            {
+                new ShaderSource(sharpeningShader, sharpeningBindings, ShaderStage.Compute, TargetLanguage.Spirv)
+            });
+        }
+
+        public void Run(
+            TextureView view,
+            CommandBufferScoped cbs,
+            Auto<DisposableImageView> destinationTexture,
+            Silk.NET.Vulkan.Format format,
+            int width,
+            int height,
+            Extent2D source,
+            Extent2D destination)
+        {
+            if (_intermediaryTexture == null
+                || _intermediaryTexture.Info.Width != width
+                || _intermediaryTexture.Info.Height != height
+                || !_intermediaryTexture.Info.Equals(view.Info))
+            {
+                var originalInfo = view.Info;
+
+                var swapRB = originalInfo.Format.IsBgr() && originalInfo.SwizzleR == SwizzleComponent.Red;
+
+                var info = new TextureCreateInfo(
+                    width,
+                    height,
+                    originalInfo.Depth,
+                    originalInfo.Levels,
+                    originalInfo.Samples,
+                    originalInfo.BlockWidth,
+                    originalInfo.BlockHeight,
+                    originalInfo.BytesPerPixel,
+                    originalInfo.Format,
+                    originalInfo.DepthStencilMode,
+                    originalInfo.Target,
+                    swapRB ? originalInfo.SwizzleB : originalInfo.SwizzleR,
+                    originalInfo.SwizzleG,
+                    swapRB ? originalInfo.SwizzleR : originalInfo.SwizzleB,
+                    originalInfo.SwizzleA);
+                _intermediaryTexture?.Dispose();
+                _intermediaryTexture = _renderer.CreateTexture(info, view.ScaleFactor) as TextureView;
+            }
+
+            Span<GAL.Viewport> viewports = stackalloc GAL.Viewport[1];
+            Span<Rectangle<int>> scissors = stackalloc Rectangle<int>[1];
+
+            viewports[0] = new GAL.Viewport(
+                new Rectangle<float>(0, 0, view.Width, view.Height),
+                ViewportSwizzle.PositiveX,
+                ViewportSwizzle.PositiveY,
+                ViewportSwizzle.PositiveZ,
+                ViewportSwizzle.PositiveW,
+                0f,
+                1f);
+
+            scissors[0] = new Rectangle<int>(0, 0, view.Width, view.Height);
+
+            _pipeline.SetCommandBuffer(cbs);
+            _pipeline.SetProgram(_scalingProgram);
+            _pipeline.SetTextureAndSampler(ShaderStage.Compute, 1, view, _sampler);
+
+            float srcWidth = Math.Abs(source.X2 - source.X1);
+            float srcHeight = Math.Abs(source.Y2 - source.Y1);
+            float scaleX = srcWidth / view.Width;
+            float scaleY = srcHeight / view.Height;
+
+            ReadOnlySpan<float> dimensionsBuffer = stackalloc float[]
+            {
+                source.X1,
+                source.X2,
+                source.Y1,
+                source.Y2,
+                destination.X1,
+                destination.X2,
+                destination.Y1,
+                destination.Y2,
+                scaleX,
+                scaleY
+            };
+
+            int rangeSize = dimensionsBuffer.Length * sizeof(float);
+            var bufferHandle = _renderer.BufferManager.CreateWithHandle(_renderer, rangeSize, false);
+            _renderer.BufferManager.SetData(bufferHandle, 0, dimensionsBuffer);
+
+            ReadOnlySpan<float> sharpeningBuffer = stackalloc float[] { 1.5f - (Level * 0.01f * 1.5f)};
+            var sharpeningBufferHandle = _renderer.BufferManager.CreateWithHandle(_renderer, sizeof(float), false);
+            _renderer.BufferManager.SetData(sharpeningBufferHandle, 0, sharpeningBuffer);
+
+            int threadGroupWorkRegionDim = 16;
+            int dispatchX = (width + (threadGroupWorkRegionDim - 1)) / threadGroupWorkRegionDim;
+            int dispatchY = (height + (threadGroupWorkRegionDim - 1)) / threadGroupWorkRegionDim;
+
+            var bufferRanges = new BufferRange(bufferHandle, 0, rangeSize);
+            _pipeline.SetUniformBuffers(stackalloc[] { new BufferAssignment(2, bufferRanges) });
+            _pipeline.SetScissors(scissors);
+            _pipeline.SetViewports(viewports, false);
+            _pipeline.SetImage(0, _intermediaryTexture, GAL.Format.R8G8B8A8Unorm);
+            _pipeline.DispatchCompute(dispatchX, dispatchY, 1);
+            _pipeline.ComputeBarrier();
+
+            viewports[0] = new GAL.Viewport(
+                new Rectangle<float>(0, 0, width, height),
+                ViewportSwizzle.PositiveX,
+                ViewportSwizzle.PositiveY,
+                ViewportSwizzle.PositiveZ,
+                ViewportSwizzle.PositiveW,
+                0f,
+                1f);
+
+            scissors[0] = new Rectangle<int>(0, 0, width, height);
+
+            // Sharpening pass
+            _pipeline.SetCommandBuffer(cbs);
+            _pipeline.SetProgram(_sharpeningProgram);
+            _pipeline.SetTextureAndSampler(ShaderStage.Compute, 1, _intermediaryTexture, _sampler);
+            _pipeline.SetUniformBuffers(stackalloc[] { new BufferAssignment(2, bufferRanges) });
+            var sharpeningRange = new BufferRange(sharpeningBufferHandle, 0, sizeof(float));
+            _pipeline.SetUniformBuffers(stackalloc[] { new BufferAssignment(4, sharpeningRange) });
+            _pipeline.SetScissors(scissors);
+            _pipeline.SetViewports(viewports, false);
+            _pipeline.SetImage(0, destinationTexture);
+            _pipeline.DispatchCompute(dispatchX, dispatchY, 1);
+            _pipeline.ComputeBarrier();
+
+            _pipeline.Finish();
+
+            _renderer.BufferManager.Delete(bufferHandle);
+            _renderer.BufferManager.Delete(sharpeningBufferHandle);
+        }
+    }
+}
\ No newline at end of file