Ryujinx/Ryujinx.Graphics.OpenGL/PersistentBuffers.cs
riperiperi 4b60371e64
Return mapped buffer pointer directly for flush, WriteableRegion for textures (#2494)
* Return mapped buffer pointer directly for flush, WriteableRegion for textures

A few changes here to generally improve performance, even for platforms not using the persistent buffer flush.

- Texture and buffer flush now return a ReadOnlySpan<byte>. It's guaranteed that this span is pinned in memory, but it will be overwritten on the next flush from that thread, so it is expected that the data is used before calling again.
- As a result, persistent mappings no longer copy to a new array - rather the persistent map is returned directly as a Span<>. A similar host array is used for the glGet flushes instead of allocating new arrays each time.
- Texture flushes now do their layout conversion into a WriteableRegion when the texture is not MultiRange, which allows the flush to happen directly into guest memory rather than into a temporary span, then copied over. This avoids another copy when doing layout conversion.

Overall, this saves 1 data copy for buffer flush, 1 copy for linear textures with matching source/target stride, and 2 copies for block textures or linear textures with mismatching strides.

* Fix tests

* Fix array pointer for Mesa/Intel path

* Address some feedback

* Update method for getting array pointer.
2021-07-19 19:10:54 -03:00

121 lines
3.8 KiB
C#

using System;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using OpenTK.Graphics.OpenGL;
using Ryujinx.Common.Logging;
using Ryujinx.Graphics.GAL;
using Ryujinx.Graphics.OpenGL.Image;
namespace Ryujinx.Graphics.OpenGL
{
class PersistentBuffers : IDisposable
{
private PersistentBuffer _main = new PersistentBuffer();
private PersistentBuffer _background = new PersistentBuffer();
public PersistentBuffer Default => BackgroundContextWorker.InBackground ? _background : _main;
public void Dispose()
{
_main?.Dispose();
_background?.Dispose();
}
}
class PersistentBuffer : IDisposable
{
private IntPtr _bufferMap;
private int _copyBufferHandle;
private int _copyBufferSize;
private byte[] _data;
private IntPtr _dataMap;
private void EnsureBuffer(int requiredSize)
{
if (_copyBufferSize < requiredSize && _copyBufferHandle != 0)
{
GL.DeleteBuffer(_copyBufferHandle);
_copyBufferHandle = 0;
}
if (_copyBufferHandle == 0)
{
_copyBufferHandle = GL.GenBuffer();
_copyBufferSize = requiredSize;
GL.BindBuffer(BufferTarget.CopyWriteBuffer, _copyBufferHandle);
GL.BufferStorage(BufferTarget.CopyWriteBuffer, requiredSize, IntPtr.Zero, BufferStorageFlags.MapReadBit | BufferStorageFlags.MapPersistentBit);
_bufferMap = GL.MapBufferRange(BufferTarget.CopyWriteBuffer, IntPtr.Zero, requiredSize, BufferAccessMask.MapReadBit | BufferAccessMask.MapPersistentBit);
}
}
public unsafe IntPtr GetHostArray(int requiredSize)
{
if (_data == null || _data.Length < requiredSize)
{
_data = GC.AllocateUninitializedArray<byte>(requiredSize, true);
_dataMap = (IntPtr)Unsafe.AsPointer(ref MemoryMarshal.GetArrayDataReference(_data));
}
return _dataMap;
}
private void Sync()
{
GL.MemoryBarrier(MemoryBarrierFlags.ClientMappedBufferBarrierBit);
IntPtr sync = GL.FenceSync(SyncCondition.SyncGpuCommandsComplete, WaitSyncFlags.None);
WaitSyncStatus syncResult = GL.ClientWaitSync(sync, ClientWaitSyncFlags.SyncFlushCommandsBit, 1000000000);
if (syncResult == WaitSyncStatus.TimeoutExpired)
{
Logger.Error?.PrintMsg(LogClass.Gpu, $"Failed to sync persistent buffer state within 1000ms. Continuing...");
}
GL.DeleteSync(sync);
}
public unsafe ReadOnlySpan<byte> GetTextureData(TextureView view, int size)
{
EnsureBuffer(size);
GL.BindBuffer(BufferTarget.PixelPackBuffer, _copyBufferHandle);
view.WriteToPbo(0, false);
GL.BindBuffer(BufferTarget.PixelPackBuffer, 0);
Sync();
return new ReadOnlySpan<byte>(_bufferMap.ToPointer(), size);
}
public unsafe ReadOnlySpan<byte> GetBufferData(BufferHandle buffer, int offset, int size)
{
EnsureBuffer(size);
GL.BindBuffer(BufferTarget.CopyReadBuffer, buffer.ToInt32());
GL.BindBuffer(BufferTarget.CopyWriteBuffer, _copyBufferHandle);
GL.CopyBufferSubData(BufferTarget.CopyReadBuffer, BufferTarget.CopyWriteBuffer, (IntPtr)offset, IntPtr.Zero, size);
GL.BindBuffer(BufferTarget.CopyWriteBuffer, 0);
Sync();
return new ReadOnlySpan<byte>(_bufferMap.ToPointer(), size);
}
public void Dispose()
{
if (_copyBufferHandle != 0)
{
GL.DeleteBuffer(_copyBufferHandle);
}
}
}
}