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Allocate clean buffer in AnalyzeEntropy #1873

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merged 2 commits into from
Dec 4, 2021
Merged

Allocate clean buffer in AnalyzeEntropy #1873

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72c6f52
Allocate clean buffer in AnalyzeEntropy
brianpopow Dec 4, 2021
3780ca7
Add lossless encode test which checks the expected bytes count of the…
brianpopow Dec 4, 2021
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4 changes: 2 additions & 2 deletions src/ImageSharp/Formats/Webp/Lossless/Vp8LEncoder.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -192,7 +192,7 @@ public Vp8LEncoder(
public bool UseCrossColorTransform { get; set; }

/// <summary>
/// Gets or sets a value indicating whether to use the substract green transform.
/// Gets or sets a value indicating whether to use the subtract green transform.
/// </summary>
public bool UseSubtractGreenTransform { get; set; }

Expand Down Expand Up @@ -1049,7 +1049,7 @@ private EntropyIx AnalyzeEntropy(ReadOnlySpan<uint> bgra, int width, int height,
return EntropyIx.Palette;
}

using IMemoryOwner<uint> histoBuffer = this.memoryAllocator.Allocate<uint>((int)HistoIx.HistoTotal * 256);
using IMemoryOwner<uint> histoBuffer = this.memoryAllocator.Allocate<uint>((int)HistoIx.HistoTotal * 256, AllocationOptions.Clean);
Span<uint> histo = histoBuffer.Memory.Span;
uint pixPrev = bgra[0]; // Skip the first pixel.
ReadOnlySpan<uint> prevRow = null;
Expand Down