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Eliminate a few allocations in ColorSpace transformers

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Jason Nelson 2024-04-01 19:01:32 -07:00 committed by BobLd
parent 6d54355754
commit 4fcc5c6c57
1 changed files with 11 additions and 1 deletions
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12
src/UglyToad.PdfPig/Graphics/Colors/ColorSpaceDetails.cs
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@ -4,6 +4,7 @@
using System.Collections.Concurrent; using System.Collections.Concurrent;
using System.Collections.Generic; using System.Collections.Generic;
using System.Linq; using System.Linq;
using System.Runtime.InteropServices;
using Tokens; using Tokens;
using UglyToad.PdfPig.Content; using UglyToad.PdfPig.Content;
using UglyToad.PdfPig.Functions; using UglyToad.PdfPig.Functions;
@ -572,7 +573,12 @@
transformed.Add(ConvertToByte(colors[c])); transformed.Add(ConvertToByte(colors[c]));
} }
} }
#if NET8_0_OR_GREATER
return CollectionsMarshal.AsSpan(transformed);
#else
return transformed.ToArray(); return transformed.ToArray();
#endif
} }
/// <inheritdoc/> /// <inheritdoc/>
@ -721,7 +727,7 @@
internal override ReadOnlySpan<byte> Transform(ReadOnlySpan<byte> values) internal override ReadOnlySpan<byte> Transform(ReadOnlySpan<byte> values)
{ {
var cache = new Dictionary<int, double[]>(); var cache = new Dictionary<int, double[]>();
var transformed = new List<byte>(); var transformed = new List<byte>(values.Length * 3);
for (var i = 0; i < values.Length; i += 3) for (var i = 0; i < values.Length; i += 3)
{ {
byte b = values[i++]; byte b = values[i++];
@ -737,7 +743,11 @@
} }
} }
#if NET8_0_OR_GREATER
return CollectionsMarshal.AsSpan(transformed);
#else
return transformed.ToArray(); return transformed.ToArray();
#endif
} }
/// <inheritdoc/> /// <inheritdoc/>