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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 AreaScalingFilter : IScalingFilter
{
private readonly OpenGLRenderer _renderer;
private int _inputUniform;
private int _outputUniform;
private int _srcX0Uniform;
private int _srcX1Uniform;
private int _srcY0Uniform;
private int _scalingShaderProgram;
private int _srcY1Uniform;
private int _dstX0Uniform;
private int _dstX1Uniform;
private int _dstY0Uniform;
private int _dstY1Uniform;
public float Level { get; set; }
public AreaScalingFilter(OpenGLRenderer renderer)
{
Initialize();
_renderer = renderer;
}
public void Dispose()
{
if (_scalingShaderProgram != 0)
{
GL.DeleteProgram(_scalingShaderProgram);
}
}
private void Initialize()
{
var scalingShader = EmbeddedResources.ReadAllText("Ryujinx.Graphics.OpenGL/Effects/Shaders/area_scaling.glsl");
_scalingShaderProgram = CompileProgram(scalingShader, ShaderType.ComputeShader);
_inputUniform = GL.GetUniformLocation(_scalingShaderProgram, "Source");
_outputUniform = GL.GetUniformLocation(_scalingShaderProgram, "imgOutput");
_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");
}
public void Run(
TextureView view,
TextureView destinationTexture,
int width,
int height,
Extents2D source,
Extents2D destination)
{
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, destinationTexture.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
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.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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