Ryujinx/Ryujinx.Graphics.OpenGL/Program.cs

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using OpenTK.Graphics.OpenGL;
using Ryujinx.Common.Logging;
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using Ryujinx.Graphics.GAL;
using Ryujinx.Graphics.Shader.CodeGen.Glsl;
using System;
using System.Collections.Generic;
using System.Linq;
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namespace Ryujinx.Graphics.OpenGL
{
class Program : IProgram
{
public int Handle { get; private set; }
public int FragmentIsBgraUniform { get; }
public int FragmentRenderScaleUniform { get; }
public int ComputeRenderScaleUniform { get; }
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public bool IsLinked { get; private set; }
public Program(IShader[] shaders, TransformFeedbackDescriptor[] transformFeedbackDescriptors)
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{
Handle = GL.CreateProgram();
for (int index = 0; index < shaders.Length; index++)
{
int shaderHandle = ((Shader)shaders[index]).Handle;
GL.AttachShader(Handle, shaderHandle);
}
if (transformFeedbackDescriptors != null)
{
List<string> varyings = new List<string>();
int cbi = 0;
foreach (var tfd in transformFeedbackDescriptors.OrderBy(x => x.BufferIndex))
{
if (tfd.VaryingLocations.Length == 0)
{
continue;
}
while (cbi < tfd.BufferIndex)
{
varyings.Add("gl_NextBuffer");
cbi++;
}
int stride = Math.Min(128 * 4, (tfd.Stride + 3) & ~3);
int j = 0;
for (; j < tfd.VaryingLocations.Length && j * 4 < stride; j++)
{
byte location = tfd.VaryingLocations[j];
varyings.Add(Varying.GetName(location) ?? "gl_SkipComponents1");
j += Varying.GetSize(location) - 1;
}
int feedbackBytes = j * 4;
while (feedbackBytes < stride)
{
int bytes = Math.Min(16, stride - feedbackBytes);
varyings.Add($"gl_SkipComponents{(bytes / 4)}");
feedbackBytes += bytes;
}
}
GL.TransformFeedbackVaryings(Handle, varyings.Count, varyings.ToArray(), TransformFeedbackMode.InterleavedAttribs);
}
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GL.LinkProgram(Handle);
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for (int index = 0; index < shaders.Length; index++)
{
int shaderHandle = ((Shader)shaders[index]).Handle;
GL.DetachShader(Handle, shaderHandle);
}
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CheckProgramLink();
FragmentIsBgraUniform = GL.GetUniformLocation(Handle, "is_bgra");
FragmentRenderScaleUniform = GL.GetUniformLocation(Handle, "fp_renderScale");
ComputeRenderScaleUniform = GL.GetUniformLocation(Handle, "cp_renderScale");
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}
public void Bind()
{
GL.UseProgram(Handle);
}
private void CheckProgramLink()
{
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GL.GetProgram(Handle, GetProgramParameterName.LinkStatus, out int status);
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if (status == 0)
{
// Use GL.GetProgramInfoLog(Handle), it may be too long to print on the log.
Logger.Debug?.Print(LogClass.Gpu, "Shader linking failed.");
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}
else
{
IsLinked = true;
}
}
public void Dispose()
{
if (Handle != 0)
{
GL.DeleteProgram(Handle);
Handle = 0;
}
}
}
}