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Initial transform feedback support (#1370)

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* Initial transform feedback support

* Some nits and fixes

* Update ReportCounterType and Write method

* Can't change shader or TFB bindings while TFB is active

* Fix geometry shader input names with new naming
This commit is contained in:
gdkchan 2020-07-15 00:01:10 -03:00 • committed by GitHub
parent 16dafe6316
commit 788ca6a411
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GPG key ID: 4AEE18F83AFDEB23
23 changed files with 468 additions and 68 deletions
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54
Ryujinx.Graphics.OpenGL/Program.cs
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@ -2,6 +2,10 @@ using OpenTK.Graphics.OpenGL;
using Ryujinx.Common.Logging;
using Ryujinx.Graphics.GAL;
using Ryujinx.Graphics.Shader;
using Ryujinx.Graphics.Shader.CodeGen.Glsl;
using System;
using System.Collections.Generic;
using System.Linq;
namespace Ryujinx.Graphics.OpenGL
{
@ -31,7 +35,7 @@ namespace Ryujinx.Graphics.OpenGL
private int[] _textureUnits;
private int[] _imageUnits;
public Program(IShader[] shaders)
public Program(IShader[] shaders, TransformFeedbackDescriptor[] transformFeedbackDescriptors)
{
_ubBindingPoints = new int[UbsPerStage * ShaderStages];
_sbBindingPoints = new int[SbsPerStage * ShaderStages];
@ -67,6 +71,54 @@ namespace Ryujinx.Graphics.OpenGL
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);
}
GL.LinkProgram(Handle);
for (int index = 0; index < shaders.Length; index++)