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58 lines
2.1 KiB
C#
58 lines
2.1 KiB
C#
using Ryujinx.Common.Memory;
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using System;
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using System.Runtime.InteropServices;
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namespace Ryujinx.Graphics.Gpu.Shader
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{
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/// <summary>
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/// Transform feedback descriptor.
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/// </summary>
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struct TransformFeedbackDescriptor
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{
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// New fields should be added to the end of the struct to keep disk shader cache compatibility.
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/// <summary>
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/// Index of the transform feedback.
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/// </summary>
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public readonly int BufferIndex;
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/// <summary>
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/// Amount of bytes consumed per vertex.
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/// </summary>
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public readonly int Stride;
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/// <summary>
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/// Number of varyings written into the buffer.
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/// </summary>
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public readonly int VaryingCount;
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/// <summary>
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/// Location of varyings to be written into the buffer. Each byte is one location.
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/// </summary>
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public Array32<uint> VaryingLocations; // Making this readonly breaks AsSpan
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/// <summary>
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/// Creates a new transform feedback descriptor.
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/// </summary>
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/// <param name="bufferIndex">Index of the transform feedback</param>
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/// <param name="stride">Amount of bytes consumed per vertex</param>
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/// <param name="varyingCount">Number of varyings written into the buffer. Indicates size in bytes of <paramref name="varyingLocations"/></param>
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/// <param name="varyingLocations">Location of varyings to be written into the buffer. Each byte is one location</param>
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public TransformFeedbackDescriptor(int bufferIndex, int stride, int varyingCount, ref Array32<uint> varyingLocations)
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{
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BufferIndex = bufferIndex;
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Stride = stride;
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VaryingCount = varyingCount;
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VaryingLocations = varyingLocations;
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}
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/// <summary>
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/// Gets a span of the <see cref="VaryingLocations"/>.
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/// </summary>
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/// <returns>Span of varying locations</returns>
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public ReadOnlySpan<byte> AsSpan()
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{
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return MemoryMarshal.Cast<uint, byte>(VaryingLocations.AsSpan()).Slice(0, Math.Min(128, VaryingCount));
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}
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}
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}
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