diff --git a/src/ImageSharp/Formats/Jpeg/Components/Encoder/HuffmanLut.cs b/src/ImageSharp/Formats/Jpeg/Components/Encoder/HuffmanLut.cs index bc6c8c6cc7..ec77bf87db 100644 --- a/src/ImageSharp/Formats/Jpeg/Components/Encoder/HuffmanLut.cs +++ b/src/ImageSharp/Formats/Jpeg/Components/Encoder/HuffmanLut.cs @@ -5,8 +5,8 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Encoder { /// /// A compiled look-up table representation of a huffmanSpec. - /// Each value maps to a uint32 of which the 8 most significant bits hold the - /// codeword size in bits and the 24 least significant bits hold the codeword. + /// Each value maps to a int32 of which the 24 most significant bits hold the + /// codeword in bits and the 8 least significant bits hold the codeword size. /// The maximum codeword size is 16 bits. /// internal readonly struct HuffmanLut @@ -51,10 +51,10 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Encoder for (int i = 0; i < spec.Count.Length; i++) { - int bits = (i + 1) << 24; + int len = i + 1; for (int j = 0; j < spec.Count[i]; j++) { - this.Values[spec.Values[k]] = bits | code; + this.Values[spec.Values[k]] = len | (code << 8); code++; k++; } diff --git a/src/ImageSharp/Formats/Jpeg/Components/Encoder/HuffmanScanEncoder.cs b/src/ImageSharp/Formats/Jpeg/Components/Encoder/HuffmanScanEncoder.cs index 36f97a23df..3f490d2958 100644 --- a/src/ImageSharp/Formats/Jpeg/Components/Encoder/HuffmanScanEncoder.cs +++ b/src/ImageSharp/Formats/Jpeg/Components/Encoder/HuffmanScanEncoder.cs @@ -1,6 +1,7 @@ // Copyright (c) Six Labors. // Licensed under the Apache License, Version 2.0. +using System; using System.IO; using System.Linq; using System.Runtime.CompilerServices; @@ -354,7 +355,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Encoder private void EmitHuff(int[] table, int value) { int x = table[value]; - this.Emit(x & ((1 << 24) - 1), x >> 24); + this.Emit(x >> 8, x & 0xff); } /// diff --git a/src/ImageSharp/Formats/Jpeg/Components/Encoder/HuffmanSpec.cs b/src/ImageSharp/Formats/Jpeg/Components/Encoder/HuffmanSpec.cs index 1f9899562b..51364e3c73 100644 --- a/src/ImageSharp/Formats/Jpeg/Components/Encoder/HuffmanSpec.cs +++ b/src/ImageSharp/Formats/Jpeg/Components/Encoder/HuffmanSpec.cs @@ -24,9 +24,9 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Encoder 0, 0, 0 }, new byte[] - { - 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 - }), + { + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 + }), // Luminance AC. new HuffmanSpec(