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Update LosslessUtils.cs

pull/2933/head
James Jackson-South 1 year ago
parent
e553807429
commit
0c0748e1c7
1 changed files with 4 additions and 4 deletions
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  1. 8
      src/ImageSharp/Formats/Webp/Lossless/LosslessUtils.cs

8
src/ImageSharp/Formats/Webp/Lossless/LosslessUtils.cs
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@ -97,14 +97,14 @@ internal static unsafe class LosslessUtils
{ {
if (Vector256.IsHardwareAccelerated && pixelData.Length >= 8) if (Vector256.IsHardwareAccelerated && pixelData.Length >= 8)
{ {
Vector256<byte> addGreenToBlueAndRedMaskAvx2 = Vector256.Create(1, 255, 1, 255, 5, 255, 5, 255, 9, 255, 9, 255, 13, 255, 13, 255, 17, 255, 17, 255, 21, 255, 21, 255, 25, 255, 25, 255, 29, 255, 29, 255); Vector256<byte> addGreenToBlueAndRedMask = Vector256.Create(1, 255, 1, 255, 5, 255, 5, 255, 9, 255, 9, 255, 13, 255, 13, 255, 17, 255, 17, 255, 21, 255, 21, 255, 25, 255, 25, 255, 29, 255, 29, 255);
nuint numPixels = (uint)pixelData.Length; nuint numPixels = (uint)pixelData.Length;
nuint i = 0; nuint i = 0;
do do
{ {
ref uint pos = ref Unsafe.Add(ref MemoryMarshal.GetReference(pixelData), i); ref uint pos = ref Unsafe.Add(ref MemoryMarshal.GetReference(pixelData), i);
Vector256<byte> input = Unsafe.As<uint, Vector256<uint>>(ref pos).AsByte(); Vector256<byte> input = Unsafe.As<uint, Vector256<uint>>(ref pos).AsByte();
Vector256<byte> in0g0g = Vector256_.ShuffleNative(input, addGreenToBlueAndRedMaskAvx2); Vector256<byte> in0g0g = Vector256_.ShuffleNative(input, addGreenToBlueAndRedMask);
Vector256<byte> output = input + in0g0g; Vector256<byte> output = input + in0g0g;
Unsafe.As<uint, Vector256<uint>>(ref pos) = output.AsUInt32(); Unsafe.As<uint, Vector256<uint>>(ref pos) = output.AsUInt32();
i += 8; i += 8;
@ -161,14 +161,14 @@ internal static unsafe class LosslessUtils
{ {
if (Vector256.IsHardwareAccelerated && pixelData.Length >= 8) if (Vector256.IsHardwareAccelerated && pixelData.Length >= 8)
{ {
Vector256<byte> subtractGreenFromBlueAndRedMaskAvx2 = Vector256.Create(1, 255, 1, 255, 5, 255, 5, 255, 9, 255, 9, 255, 13, 255, 13, 255, 17, 255, 17, 255, 21, 255, 21, 255, 25, 255, 25, 255, 29, 255, 29, 255); Vector256<byte> subtractGreenFromBlueAndRedMask = Vector256.Create(1, 255, 1, 255, 5, 255, 5, 255, 9, 255, 9, 255, 13, 255, 13, 255, 17, 255, 17, 255, 21, 255, 21, 255, 25, 255, 25, 255, 29, 255, 29, 255);
nuint numPixels = (uint)pixelData.Length; nuint numPixels = (uint)pixelData.Length;
nuint i = 0; nuint i = 0;
do do
{ {
ref uint pos = ref Unsafe.Add(ref MemoryMarshal.GetReference(pixelData), i); ref uint pos = ref Unsafe.Add(ref MemoryMarshal.GetReference(pixelData), i);
Vector256<byte> input = Unsafe.As<uint, Vector256<uint>>(ref pos).AsByte(); Vector256<byte> input = Unsafe.As<uint, Vector256<uint>>(ref pos).AsByte();
Vector256<byte> in0g0g = Vector256_.ShuffleNative(input, subtractGreenFromBlueAndRedMaskAvx2); Vector256<byte> in0g0g = Vector256_.ShuffleNative(input, subtractGreenFromBlueAndRedMask);
Vector256<byte> output = input - in0g0g; Vector256<byte> output = input - in0g0g;
Unsafe.As<uint, Vector256<uint>>(ref pos) = output.AsUInt32(); Unsafe.As<uint, Vector256<uint>>(ref pos) = output.AsUInt32();
i += 8; i += 8;

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