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Added special case for small amounts of data for all copying helpers

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This commit is contained in:
Darth Affe 2024-07-21 17:42:01 +02:00
parent cfdd95f079
commit bd7a2bca48
4 changed files with 210 additions and 69 deletions
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43
HPPH/PixelHelper.Average.cs
View File

@ -13,16 +13,27 @@ public static partial class PixelHelper
ArgumentNullException.ThrowIfNull(image);
int dataLength = image.SizeInBytes;
byte[] array = ArrayPool<byte>.Shared.Rent(dataLength);
Span<byte> buffer = array.AsSpan()[..dataLength];
try
if (dataLength <= 1024)
{
Span<byte> buffer = stackalloc byte[dataLength];
image.CopyTo(buffer);
return image.ColorFormat.Average(buffer);
}
finally
else
{
ArrayPool<byte>.Shared.Return(array);
byte[] array = ArrayPool<byte>.Shared.Rent(dataLength);
Span<byte> buffer = array.AsSpan()[..dataLength];
try
{
image.CopyTo(buffer);
return image.ColorFormat.Average(buffer);
}
finally
{
ArrayPool<byte>.Shared.Return(array);
}
}
}
@ -34,16 +45,28 @@ public static partial class PixelHelper
where T : struct, IColor
{
int dataLength = image.Width * image.Height;
T[] array = ArrayPool<T>.Shared.Rent(dataLength);
Span<T> buffer = array.AsSpan()[..(dataLength)];
try
int sizeInBytes = dataLength * T.ColorFormat.BytesPerPixel;
if (sizeInBytes <= 1024)
{
Span<T> buffer = MemoryMarshal.Cast<byte, T>(stackalloc byte[sizeInBytes]);
image.CopyTo(buffer);
return Average(buffer);
}
finally
else
{
ArrayPool<T>.Shared.Return(array);
T[] array = ArrayPool<T>.Shared.Rent(dataLength);
Span<T> buffer = array.AsSpan()[..dataLength];
try
{
image.CopyTo(buffer);
return Average(buffer);
}
finally
{
ArrayPool<T>.Shared.Return(array);
}
}
}

43
HPPH/PixelHelper.MinMax.cs
View File

@ -14,16 +14,27 @@ public static unsafe partial class PixelHelper
ArgumentNullException.ThrowIfNull(image);
int dataLength = image.SizeInBytes;
byte[] array = ArrayPool<byte>.Shared.Rent(dataLength);
Span<byte> buffer = array.AsSpan()[..dataLength];
try
if (dataLength <= 1024)
{
Span<byte> buffer = stackalloc byte[dataLength];
image.CopyTo(buffer);
return image.ColorFormat.MinMax(buffer);
}
finally
else
{
ArrayPool<byte>.Shared.Return(array);
byte[] array = ArrayPool<byte>.Shared.Rent(dataLength);
Span<byte> buffer = array.AsSpan()[..dataLength];
try
{
image.CopyTo(buffer);
return image.ColorFormat.MinMax(buffer);
}
finally
{
ArrayPool<byte>.Shared.Return(array);
}
}
}
@ -35,16 +46,28 @@ public static unsafe partial class PixelHelper
where T : struct, IColor
{
int dataLength = image.Width * image.Height;
T[] array = ArrayPool<T>.Shared.Rent(dataLength);
Span<T> buffer = array.AsSpan()[..(dataLength)];
try
int sizeInBytes = dataLength * T.ColorFormat.BytesPerPixel;
if (sizeInBytes <= 1024)
{
Span<T> buffer = MemoryMarshal.Cast<byte, T>(stackalloc byte[sizeInBytes]);
image.CopyTo(buffer);
return MinMax(buffer);
}
finally
else
{
ArrayPool<T>.Shared.Return(array);
T[] array = ArrayPool<T>.Shared.Rent(dataLength);
Span<T> buffer = array.AsSpan()[..(dataLength)];
try
{
image.CopyTo(buffer);
return MinMax(buffer);
}
finally
{
ArrayPool<T>.Shared.Return(array);
}
}
}
public static IMinMax MinMax<T>(this Span<T> colors)

150
HPPH/PixelHelper.Quantize.cs
View File

@ -1,5 +1,7 @@
using System.Buffers;
using System.Numerics;
using System.Runtime.InteropServices;
using static System.Net.Mime.MediaTypeNames;
namespace HPPH;
@ -12,16 +14,27 @@ public static partial class PixelHelper
ArgumentNullException.ThrowIfNull(image);
int dataLength = image.SizeInBytes;
byte[] array = ArrayPool<byte>.Shared.Rent(dataLength);
Span<byte> buffer = array.AsSpan()[..dataLength];
try
if (dataLength <= 1024)
{
Span<byte> buffer = stackalloc byte[dataLength];
image.CopyTo(buffer);
return image.ColorFormat.CreateColorPalette(buffer, paletteSize);
}
finally
else
{
ArrayPool<byte>.Shared.Return(array);
byte[] array = ArrayPool<byte>.Shared.Rent(dataLength);
Span<byte> buffer = array.AsSpan()[..dataLength];
try
{
image.CopyTo(buffer);
return image.ColorFormat.CreateColorPalette(buffer, paletteSize);
}
finally
{
ArrayPool<byte>.Shared.Return(array);
}
}
}
@ -33,33 +46,57 @@ public static partial class PixelHelper
where T : unmanaged, IColor
{
int dataLength = image.Width * image.Height;
T[] array = ArrayPool<T>.Shared.Rent(dataLength);
Span<T> buffer = array.AsSpan()[..(dataLength)];
try
int sizeInBytes = dataLength * T.ColorFormat.BytesPerPixel;
if (sizeInBytes <= 1024)
{
Span<T> buffer = MemoryMarshal.Cast<byte, T>(stackalloc byte[sizeInBytes]);
image.CopyTo(buffer);
return CreateColorPalette(buffer, paletteSize);
}
finally
else
{
ArrayPool<T>.Shared.Return(array);
T[] array = ArrayPool<T>.Shared.Rent(dataLength);
Span<T> buffer = array.AsSpan()[..(dataLength)];
try
{
image.CopyTo(buffer);
return CreateColorPalette(buffer, paletteSize);
}
finally
{
ArrayPool<T>.Shared.Return(array);
}
}
}
public static T[] CreateColorPalette<T>(this ReadOnlySpan<T> colors, int paletteSize)
where T : unmanaged, IColor
{
T[] buffer = ArrayPool<T>.Shared.Rent(colors.Length);
try
{
Span<T> colorBuffer = buffer.AsSpan()[..colors.Length];
colors.CopyTo(colorBuffer);
int sizeInBytes = colors.Length * T.ColorFormat.BytesPerPixel;
return CreateColorPalette(colorBuffer, paletteSize);
}
finally
if (sizeInBytes <= 1024)
{
ArrayPool<T>.Shared.Return(buffer);
Span<T> buffer = MemoryMarshal.Cast<byte, T>(stackalloc byte[sizeInBytes]);
colors.CopyTo(buffer);
return CreateColorPalette(buffer, paletteSize);
}
else
{
T[] buffer = ArrayPool<T>.Shared.Rent(colors.Length);
try
{
Span<T> colorBuffer = buffer.AsSpan()[..colors.Length];
colors.CopyTo(colorBuffer);
return CreateColorPalette(colorBuffer, paletteSize);
}
finally
{
ArrayPool<T>.Shared.Return(buffer);
}
}
}
@ -69,7 +106,7 @@ public static partial class PixelHelper
throw new NotImplementedException("This requires some more research and will be implemented later");
//TODO DarthAffe 21.07.2024: Run some tests how the result to performance ratio is with the options described at http://blog.pkh.me/p/39-improving-color-quantization-heuristics.html
//if (paletteSize < 0) throw new ArgumentException("PaletteSize can't be < 0", nameof(paletteSize));
//if (paletteSize == 0) return [];
@ -102,16 +139,27 @@ public static partial class PixelHelper
ArgumentNullException.ThrowIfNull(image);
int dataLength = image.SizeInBytes;
byte[] array = ArrayPool<byte>.Shared.Rent(dataLength);
Span<byte> buffer = array.AsSpan()[..dataLength];
try
if (dataLength <= 1024)
{
Span<byte> buffer = stackalloc byte[dataLength];
image.CopyTo(buffer);
return image.ColorFormat.CreateSimpleColorPalette(buffer, paletteSize);
}
finally
else
{
ArrayPool<byte>.Shared.Return(array);
byte[] array = ArrayPool<byte>.Shared.Rent(dataLength);
Span<byte> buffer = array.AsSpan()[..dataLength];
try
{
image.CopyTo(buffer);
return image.ColorFormat.CreateSimpleColorPalette(buffer, paletteSize);
}
finally
{
ArrayPool<byte>.Shared.Return(array);
}
}
}
@ -123,33 +171,57 @@ public static partial class PixelHelper
where T : unmanaged, IColor
{
int dataLength = image.Width * image.Height;
T[] array = ArrayPool<T>.Shared.Rent(dataLength);
Span<T> buffer = array.AsSpan()[..(dataLength)];
try
int sizeInBytes = dataLength * T.ColorFormat.BytesPerPixel;
if (sizeInBytes <= 1024)
{
Span<T> buffer = MemoryMarshal.Cast<byte, T>(stackalloc byte[sizeInBytes]);
image.CopyTo(buffer);
return CreateSimpleColorPalette(buffer, paletteSize);
}
finally
else
{
ArrayPool<T>.Shared.Return(array);
T[] array = ArrayPool<T>.Shared.Rent(dataLength);
Span<T> buffer = array.AsSpan()[..(dataLength)];
try
{
image.CopyTo(buffer);
return CreateSimpleColorPalette(buffer, paletteSize);
}
finally
{
ArrayPool<T>.Shared.Return(array);
}
}
}
public static T[] CreateSimpleColorPalette<T>(this ReadOnlySpan<T> colors, int paletteSize)
where T : unmanaged, IColor
{
T[] buffer = ArrayPool<T>.Shared.Rent(colors.Length);
try
{
Span<T> colorBuffer = buffer.AsSpan()[..colors.Length];
colors.CopyTo(colorBuffer);
int sizeInBytes = colors.Length * T.ColorFormat.BytesPerPixel;
return CreateSimpleColorPalette(colorBuffer, paletteSize);
}
finally
if (sizeInBytes <= 1024)
{
ArrayPool<T>.Shared.Return(buffer);
Span<T> buffer = MemoryMarshal.Cast<byte, T>(stackalloc byte[sizeInBytes]);
colors.CopyTo(buffer);
return CreateSimpleColorPalette(buffer, paletteSize);
}
else
{
T[] buffer = ArrayPool<T>.Shared.Rent(colors.Length);
try
{
Span<T> colorBuffer = buffer.AsSpan()[..colors.Length];
colors.CopyTo(colorBuffer);
return CreateSimpleColorPalette(colorBuffer, paletteSize);
}
finally
{
ArrayPool<T>.Shared.Return(buffer);
}
}
}

43
HPPH/PixelHelper.Sum.cs
View File

@ -15,16 +15,27 @@ public static unsafe partial class PixelHelper
ArgumentNullException.ThrowIfNull(image);
int dataLength = image.SizeInBytes;
byte[] array = ArrayPool<byte>.Shared.Rent(dataLength);
Span<byte> buffer = array.AsSpan()[..dataLength];
try
if (dataLength <= 1024)
{
Span<byte> buffer = stackalloc byte[dataLength];
image.CopyTo(buffer);
return image.ColorFormat.Sum(buffer);
}
finally
else
{
ArrayPool<byte>.Shared.Return(array);
byte[] array = ArrayPool<byte>.Shared.Rent(dataLength);
Span<byte> buffer = array.AsSpan()[..dataLength];
try
{
image.CopyTo(buffer);
return image.ColorFormat.Sum(buffer);
}
finally
{
ArrayPool<byte>.Shared.Return(array);
}
}
}
@ -36,16 +47,28 @@ public static unsafe partial class PixelHelper
where T : struct, IColor
{
int dataLength = image.Width * image.Height;
T[] array = ArrayPool<T>.Shared.Rent(dataLength);
Span<T> buffer = array.AsSpan()[..(dataLength)];
try
int sizeInBytes = dataLength * T.ColorFormat.BytesPerPixel;
if (sizeInBytes <= 1024)
{
Span<T> buffer = MemoryMarshal.Cast<byte, T>(stackalloc byte[sizeInBytes]);
image.CopyTo(buffer);
return Sum(buffer);
}
finally
else
{
ArrayPool<T>.Shared.Return(array);
T[] array = ArrayPool<T>.Shared.Rent(dataLength);
Span<T> buffer = array.AsSpan()[..(dataLength)];
try
{
image.CopyTo(buffer);
return Sum(buffer);
}
finally
{
ArrayPool<T>.Shared.Return(array);
}
}
}