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Implement transform feedback emulation for hardware without native support (#5080)

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* Implement transform feedback emulation for hardware without native support

* Stop doing some useless buffer updates and account for non-zero base instance

* Reduce redundant updates even more

* Update descriptor init logic to account for ResourceLayout

* Fix transform feedback and storage buffers not being updated in some cases

* Shader cache version bump

* PR feedback

* SetInstancedDrawVertexCount must be always called after UpdateState

* Minor typo
This commit is contained in:
gdkchan 2023-06-10 18:31:38 -03:00 • committed by GitHub
parent 0e95a8271a
commit eb0bb36bbf
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GPG key ID: 4AEE18F83AFDEB23
21 changed files with 375 additions and 68 deletions
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18
src/Ryujinx.Graphics.Gpu/Engine/Threed/StateUpdater.cs
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@ -269,7 +269,7 @@ namespace Ryujinx.Graphics.Gpu.Engine.Threed
_prevFirstVertex = _state.State.FirstVertex;
}
bool tfEnable = _state.State.TfEnable;
bool tfEnable = _state.State.TfEnable && _context.Capabilities.SupportsTransformFeedback;
if (!tfEnable && _prevTfEnable)
{
@ -1367,6 +1367,22 @@ namespace Ryujinx.Graphics.Gpu.Engine.Threed
_vsUsesDrawParameters = gs.Shaders[1]?.Info.UsesDrawParameters ?? false;
_vsClipDistancesWritten = gs.Shaders[1]?.Info.ClipDistancesWritten ?? 0;
bool hasTransformFeedback = gs.SpecializationState.TransformFeedbackDescriptors != null;
if (hasTransformFeedback != _channel.BufferManager.HasTransformFeedbackOutputs)
{
if (!_context.Capabilities.SupportsTransformFeedback)
{
// If host does not support transform feedback, and the shader changed,
// we might need to update bindings as transform feedback emulation
// uses storage buffer bindings that might have been used for something
// else in a previous draw.
_channel.BufferManager.ForceTransformFeedbackAndStorageBuffersDirty();
}
_channel.BufferManager.HasTransformFeedbackOutputs = hasTransformFeedback;
}
if (oldVsClipDistancesWritten != _vsClipDistancesWritten)
{
UpdateUserClipState();