39 lines
1.1 KiB
C#
39 lines
1.1 KiB
C#
using System;
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using System.Runtime.InteropServices;
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using System.Runtime.Intrinsics;
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using System.Runtime.Intrinsics.X86;
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namespace Ryujinx.Graphics.Texture
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{
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public static class PixelConverter
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{
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public unsafe static byte[] ConvertR4G4ToR4G4B4A4(ReadOnlySpan<byte> data)
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{
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byte[] output = new byte[data.Length * 2];
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int start = 0;
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if (Sse41.IsSupported)
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{
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int sizeTrunc = data.Length & ~7;
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start = sizeTrunc;
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fixed (byte* inputPtr = data, outputPtr = output)
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{
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for (ulong offset = 0; offset < (ulong)sizeTrunc; offset += 8)
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{
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Sse2.Store(outputPtr + offset * 2, Sse41.ConvertToVector128Int16(inputPtr + offset).AsByte());
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}
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}
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}
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Span<ushort> outputSpan = MemoryMarshal.Cast<byte, ushort>(output);
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for (int i = start; i < data.Length; i++)
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{
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outputSpan[i] = (ushort)data[i];
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}
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return output;
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}
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}
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}
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