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using OpenTK.Graphics.OpenGL;
using Ryujinx.Common;
using Ryujinx.Graphics.GAL;
using Ryujinx.Graphics.OpenGL.Image;
using System;
using static Ryujinx.Graphics.OpenGL.Effects.ShaderHelper;
namespace Ryujinx.Graphics.OpenGL.Effects
{
internal class FsrScalingFilter : IScalingFilter
{
private readonly OpenGLRenderer _renderer;
private int _inputUniform;
private int _outputUniform;
private int _sharpeningUniform;
private int _srcX0Uniform;
private int _srcX1Uniform;
private int _srcY0Uniform;
private int _scalingShaderProgram;
private int _sharpeningShaderProgram;
private float _sharpeningLevel = 1;
private int _srcY1Uniform;
private int _dstX0Uniform;
private int _dstX1Uniform;
private int _dstY0Uniform;
private int _dstY1Uniform;
private int _scaleXUniform;
private int _scaleYUniform;
private TextureStorage _intermediaryTexture;
public float Level
{
get => _sharpeningLevel;
set
{
_sharpeningLevel = MathF.Max(0.01f, value);
}
}
public FsrScalingFilter(OpenGLRenderer renderer)
{
Initialize();
_renderer = renderer;
}
public void Dispose()
{
if (_scalingShaderProgram != 0)
{
GL.DeleteProgram(_scalingShaderProgram);
GL.DeleteProgram(_sharpeningShaderProgram);
}
_intermediaryTexture?.Dispose();
}
private void Initialize()
{
var scalingShader = EmbeddedResources.ReadAllText("Ryujinx.Graphics.OpenGL/Effects/Shaders/fsr_scaling.glsl");
var sharpeningShader = EmbeddedResources.ReadAllText("Ryujinx.Graphics.OpenGL/Effects/Shaders/fsr_sharpening.glsl");
var fsrA = EmbeddedResources.ReadAllText("Ryujinx.Graphics.OpenGL/Effects/Shaders/ffx_a.h");
var fsr1 = EmbeddedResources.ReadAllText("Ryujinx.Graphics.OpenGL/Effects/Shaders/ffx_fsr1.h");
scalingShader = scalingShader.Replace("#include \"ffx_a.h\"", fsrA);
scalingShader = scalingShader.Replace("#include \"ffx_fsr1.h\"", fsr1);
sharpeningShader = sharpeningShader.Replace("#include \"ffx_a.h\"", fsrA);
sharpeningShader = sharpeningShader.Replace("#include \"ffx_fsr1.h\"", fsr1);
_scalingShaderProgram = CompileProgram(scalingShader, ShaderType.ComputeShader);
_sharpeningShaderProgram = CompileProgram(sharpeningShader, ShaderType.ComputeShader);
_inputUniform = GL.GetUniformLocation(_scalingShaderProgram, "Source");
_outputUniform = GL.GetUniformLocation(_scalingShaderProgram, "imgOutput");
_sharpeningUniform = GL.GetUniformLocation(_sharpeningShaderProgram, "sharpening");
_srcX0Uniform = GL.GetUniformLocation(_scalingShaderProgram, "srcX0");
_srcX1Uniform = GL.GetUniformLocation(_scalingShaderProgram, "srcX1");
_srcY0Uniform = GL.GetUniformLocation(_scalingShaderProgram, "srcY0");
_srcY1Uniform = GL.GetUniformLocation(_scalingShaderProgram, "srcY1");
_dstX0Uniform = GL.GetUniformLocation(_scalingShaderProgram, "dstX0");
_dstX1Uniform = GL.GetUniformLocation(_scalingShaderProgram, "dstX1");
_dstY0Uniform = GL.GetUniformLocation(_scalingShaderProgram, "dstY0");
_dstY1Uniform = GL.GetUniformLocation(_scalingShaderProgram, "dstY1");
_scaleXUniform = GL.GetUniformLocation(_scalingShaderProgram, "scaleX");
_scaleYUniform = GL.GetUniformLocation(_scalingShaderProgram, "scaleY");
}
public void Run(
TextureView view,
TextureView destinationTexture,
int width,
int height,
Extents2D source,
Extents2D destination)
{
if (_intermediaryTexture == null || _intermediaryTexture.Info.Width != width || _intermediaryTexture.Info.Height != height)
{
_intermediaryTexture?.Dispose();
var originalInfo = view.Info;
var info = new TextureCreateInfo(width,
height,
originalInfo.Depth,
originalInfo.Levels,
originalInfo.Samples,
originalInfo.BlockWidth,
originalInfo.BlockHeight,
originalInfo.BytesPerPixel,
originalInfo.Format,
originalInfo.DepthStencilMode,
originalInfo.Target,
originalInfo.SwizzleR,
originalInfo.SwizzleG,
originalInfo.SwizzleB,
originalInfo.SwizzleA);
_intermediaryTexture = new TextureStorage(_renderer, info);
_intermediaryTexture.CreateDefaultView();
}
var textureView = _intermediaryTexture.CreateView(_intermediaryTexture.Info, 0, 0) as TextureView;
int previousProgram = GL.GetInteger(GetPName.CurrentProgram);
int previousUnit = GL.GetInteger(GetPName.ActiveTexture);
GL.ActiveTexture(TextureUnit.Texture0);
int previousTextureBinding = GL.GetInteger(GetPName.TextureBinding2D);
GL.BindImageTexture(0, textureView.Handle, 0, false, 0, TextureAccess.ReadWrite, SizedInternalFormat.Rgba8);
int threadGroupWorkRegionDim = 16;
int dispatchX = (width + (threadGroupWorkRegionDim - 1)) / threadGroupWorkRegionDim;
int dispatchY = (height + (threadGroupWorkRegionDim - 1)) / threadGroupWorkRegionDim;
// Scaling pass
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;
GL.UseProgram(_scalingShaderProgram);
view.Bind(0);
GL.Uniform1(_inputUniform, 0);
GL.Uniform1(_outputUniform, 0);
GL.Uniform1(_srcX0Uniform, (float)source.X1);
GL.Uniform1(_srcX1Uniform, (float)source.X2);
GL.Uniform1(_srcY0Uniform, (float)source.Y1);
GL.Uniform1(_srcY1Uniform, (float)source.Y2);
GL.Uniform1(_dstX0Uniform, (float)destination.X1);
GL.Uniform1(_dstX1Uniform, (float)destination.X2);
GL.Uniform1(_dstY0Uniform, (float)destination.Y1);
GL.Uniform1(_dstY1Uniform, (float)destination.Y2);
GL.Uniform1(_scaleXUniform, scaleX);
GL.Uniform1(_scaleYUniform, scaleY);
GL.DispatchCompute(dispatchX, dispatchY, 1);
GL.MemoryBarrier(MemoryBarrierFlags.ShaderImageAccessBarrierBit);
// Sharpening Pass
GL.UseProgram(_sharpeningShaderProgram);
GL.BindImageTexture(0, destinationTexture.Handle, 0, false, 0, TextureAccess.ReadWrite, SizedInternalFormat.Rgba8);
textureView.Bind(0);
GL.Uniform1(_inputUniform, 0);
GL.Uniform1(_outputUniform, 0);
GL.Uniform1(_sharpeningUniform, 1.5f - (Level * 0.01f * 1.5f));
GL.DispatchCompute(dispatchX, dispatchY, 1);
GL.UseProgram(previousProgram);
GL.MemoryBarrier(MemoryBarrierFlags.ShaderImageAccessBarrierBit);
(_renderer.Pipeline as Pipeline).RestoreImages1And2();
GL.ActiveTexture(TextureUnit.Texture0);
GL.BindTexture(TextureTarget.Texture2D, previousTextureBinding);
GL.ActiveTexture((TextureUnit)previousUnit);
}
}
}
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