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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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36
Ryujinx.Graphics.Gpu/Shader/ShaderCache.cs
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@ -82,7 +82,7 @@ namespace Ryujinx.Graphics.Gpu.Shader
shader.HostShader = _context.Renderer.CompileShader(shader.Program);
IProgram hostProgram = _context.Renderer.CreateProgram(new IShader[] { shader.HostShader });
IProgram hostProgram = _context.Renderer.CreateProgram(new IShader[] { shader.HostShader }, null);
ShaderBundle cpShader = new ShaderBundle(hostProgram, shader);
@ -150,6 +150,8 @@ namespace Ryujinx.Graphics.Gpu.Shader
continue;
}
var tfd = GetTransformFeedbackDescriptors(state);
IShader hostShader = _context.Renderer.CompileShader(program);
shaders[stage].HostShader = hostShader;
@ -157,7 +159,7 @@ namespace Ryujinx.Graphics.Gpu.Shader
hostShaders.Add(hostShader);
}
IProgram hostProgram = _context.Renderer.CreateProgram(hostShaders.ToArray());
IProgram hostProgram = _context.Renderer.CreateProgram(hostShaders.ToArray(), GetTransformFeedbackDescriptors(state));
ShaderBundle gpShaders = new ShaderBundle(hostProgram, shaders);
@ -173,6 +175,36 @@ namespace Ryujinx.Graphics.Gpu.Shader
return gpShaders;
}
/// <summary>
/// Gets transform feedback state from the current GPU state.
/// </summary>
/// <param name="state">Current GPU state</param>
/// <returns>Four transform feedback descriptors for the enabled TFBs, or null if TFB is disabled</returns>
private TransformFeedbackDescriptor[] GetTransformFeedbackDescriptors(GpuState state)
{
bool tfEnable = state.Get<Boolean32>(MethodOffset.TfEnable);
if (!tfEnable)
{
return null;
}
TransformFeedbackDescriptor[] descs = new TransformFeedbackDescriptor[Constants.TotalTransformFeedbackBuffers];
for (int i = 0; i < Constants.TotalTransformFeedbackBuffers; i++)
{
var tf = state.Get<TfState>(MethodOffset.TfState, i);
int length = (int)Math.Min((uint)tf.VaryingsCount, 0x80);
var varyingLocations = state.GetSpan(MethodOffset.TfVaryingLocations + i * 0x80, length).ToArray();
descs[i] = new TransformFeedbackDescriptor(tf.BufferIndex, tf.Stride, varyingLocations);
}
return descs;
}
/// <summary>
/// Checks if compute shader code in memory is equal to the cached shader.
/// </summary>