mirror of https://github.com/SixLabors/ImageSharp
James Jackson-South
9 years ago
10 changed files with 253 additions and 227 deletions
@ -1,199 +0,0 @@ |
|||
// Copyright (c) Six Labors and contributors.
|
|||
// Licensed under the Apache License, Version 2.0.
|
|||
|
|||
using System; |
|||
using System.Numerics; |
|||
using System.Runtime.CompilerServices; |
|||
using SixLabors.ImageSharp.Memory; |
|||
|
|||
namespace SixLabors.ImageSharp.Processing.Processors |
|||
{ |
|||
/// <content>
|
|||
/// Conains the definition of <see cref="WeightsWindow"/> and <see cref="WeightsBuffer"/>.
|
|||
/// </content>
|
|||
internal abstract partial class ResamplingWeightedProcessor<TPixel> |
|||
{ |
|||
/// <summary>
|
|||
/// Points to a collection of of weights allocated in <see cref="WeightsBuffer"/>.
|
|||
/// </summary>
|
|||
internal struct WeightsWindow |
|||
{ |
|||
/// <summary>
|
|||
/// The local left index position
|
|||
/// </summary>
|
|||
public int Left; |
|||
|
|||
/// <summary>
|
|||
/// The length of the weights window
|
|||
/// </summary>
|
|||
public int Length; |
|||
|
|||
/// <summary>
|
|||
/// The index in the destination buffer
|
|||
/// </summary>
|
|||
private readonly int flatStartIndex; |
|||
|
|||
/// <summary>
|
|||
/// The buffer containing the weights values.
|
|||
/// </summary>
|
|||
private readonly Buffer<float> buffer; |
|||
|
|||
/// <summary>
|
|||
/// Initializes a new instance of the <see cref="WeightsWindow"/> struct.
|
|||
/// </summary>
|
|||
/// <param name="index">The destination index in the buffer</param>
|
|||
/// <param name="left">The local left index</param>
|
|||
/// <param name="buffer">The span</param>
|
|||
/// <param name="length">The length of the window</param>
|
|||
[MethodImpl(MethodImplOptions.AggressiveInlining)] |
|||
internal WeightsWindow(int index, int left, Buffer2D<float> buffer, int length) |
|||
{ |
|||
this.flatStartIndex = (index * buffer.Width) + left; |
|||
this.Left = left; |
|||
this.buffer = buffer; |
|||
this.Length = length; |
|||
} |
|||
|
|||
/// <summary>
|
|||
/// Gets a reference to the first item of the window.
|
|||
/// </summary>
|
|||
/// <returns>The reference to the first item of the window</returns>
|
|||
[MethodImpl(MethodImplOptions.AggressiveInlining)] |
|||
public ref float GetStartReference() |
|||
{ |
|||
return ref this.buffer[this.flatStartIndex]; |
|||
} |
|||
|
|||
/// <summary>
|
|||
/// Gets the span representing the portion of the <see cref="WeightsBuffer"/> that this window covers
|
|||
/// </summary>
|
|||
/// <returns>The <see cref="Span{T}"/></returns>
|
|||
[MethodImpl(MethodImplOptions.AggressiveInlining)] |
|||
public Span<float> GetWindowSpan() => this.buffer.Slice(this.flatStartIndex, this.Length); |
|||
|
|||
/// <summary>
|
|||
/// Computes the sum of vectors in 'rowSpan' weighted by weight values, pointed by this <see cref="WeightsWindow"/> instance.
|
|||
/// </summary>
|
|||
/// <param name="rowSpan">The input span of vectors</param>
|
|||
/// <param name="sourceX">The source row position.</param>
|
|||
/// <returns>The weighted sum</returns>
|
|||
[MethodImpl(MethodImplOptions.AggressiveInlining)] |
|||
public Vector4 ComputeWeightedRowSum(Span<Vector4> rowSpan, int sourceX) |
|||
{ |
|||
ref float horizontalValues = ref this.GetStartReference(); |
|||
int left = this.Left; |
|||
ref Vector4 vecPtr = ref Unsafe.Add(ref rowSpan.DangerousGetPinnableReference(), left + sourceX); |
|||
|
|||
// Destination color components
|
|||
Vector4 result = Vector4.Zero; |
|||
|
|||
for (int i = 0; i < this.Length; i++) |
|||
{ |
|||
float weight = Unsafe.Add(ref horizontalValues, i); |
|||
Vector4 v = Unsafe.Add(ref vecPtr, i); |
|||
result += v * weight; |
|||
} |
|||
|
|||
return result; |
|||
} |
|||
|
|||
/// <summary>
|
|||
/// Computes the sum of vectors in 'rowSpan' weighted by weight values, pointed by this <see cref="WeightsWindow"/> instance.
|
|||
/// Applies <see cref="Vector4Extensions.Expand(float)"/> to all input vectors.
|
|||
/// </summary>
|
|||
/// <param name="rowSpan">The input span of vectors</param>
|
|||
/// <param name="sourceX">The source row position.</param>
|
|||
/// <returns>The weighted sum</returns>
|
|||
[MethodImpl(MethodImplOptions.AggressiveInlining)] |
|||
public Vector4 ComputeExpandedWeightedRowSum(Span<Vector4> rowSpan, int sourceX) |
|||
{ |
|||
ref float horizontalValues = ref this.GetStartReference(); |
|||
int left = this.Left; |
|||
ref Vector4 vecPtr = ref Unsafe.Add(ref rowSpan.DangerousGetPinnableReference(), left + sourceX); |
|||
|
|||
// Destination color components
|
|||
Vector4 result = Vector4.Zero; |
|||
|
|||
for (int i = 0; i < this.Length; i++) |
|||
{ |
|||
float weight = Unsafe.Add(ref horizontalValues, i); |
|||
Vector4 v = Unsafe.Add(ref vecPtr, i); |
|||
result += v.Expand() * weight; |
|||
} |
|||
|
|||
return result; |
|||
} |
|||
|
|||
/// <summary>
|
|||
/// Computes the sum of vectors in 'firstPassPixels' at a row pointed by 'x',
|
|||
/// weighted by weight values, pointed by this <see cref="WeightsWindow"/> instance.
|
|||
/// </summary>
|
|||
/// <param name="firstPassPixels">The buffer of input vectors in row first order</param>
|
|||
/// <param name="x">The row position</param>
|
|||
/// <param name="sourceY">The source column position.</param>
|
|||
/// <returns>The weighted sum</returns>
|
|||
[MethodImpl(MethodImplOptions.AggressiveInlining)] |
|||
public Vector4 ComputeWeightedColumnSum(Buffer2D<Vector4> firstPassPixels, int x, int sourceY) |
|||
{ |
|||
ref float verticalValues = ref this.GetStartReference(); |
|||
int left = this.Left; |
|||
|
|||
// Destination color components
|
|||
Vector4 result = Vector4.Zero; |
|||
|
|||
for (int i = 0; i < this.Length; i++) |
|||
{ |
|||
float yw = Unsafe.Add(ref verticalValues, i); |
|||
int index = left + i + sourceY; |
|||
result += firstPassPixels[x, index] * yw; |
|||
} |
|||
|
|||
return result; |
|||
} |
|||
} |
|||
|
|||
/// <summary>
|
|||
/// Holds the <see cref="WeightsWindow"/> values in an optimized contigous memory region.
|
|||
/// </summary>
|
|||
internal class WeightsBuffer : IDisposable |
|||
{ |
|||
private readonly Buffer2D<float> dataBuffer; |
|||
|
|||
/// <summary>
|
|||
/// Initializes a new instance of the <see cref="WeightsBuffer"/> class.
|
|||
/// </summary>
|
|||
/// <param name="sourceSize">The size of the source window</param>
|
|||
/// <param name="destinationSize">The size of the destination window</param>
|
|||
public WeightsBuffer(int sourceSize, int destinationSize) |
|||
{ |
|||
this.dataBuffer = Buffer2D<float>.CreateClean(sourceSize, destinationSize); |
|||
this.Weights = new WeightsWindow[destinationSize]; |
|||
} |
|||
|
|||
/// <summary>
|
|||
/// Gets the calculated <see cref="Weights"/> values.
|
|||
/// </summary>
|
|||
public WeightsWindow[] Weights { get; } |
|||
|
|||
/// <summary>
|
|||
/// Disposes <see cref="WeightsBuffer"/> instance releasing it's backing buffer.
|
|||
/// </summary>
|
|||
public void Dispose() |
|||
{ |
|||
this.dataBuffer.Dispose(); |
|||
} |
|||
|
|||
/// <summary>
|
|||
/// Slices a weights value at the given positions.
|
|||
/// </summary>
|
|||
/// <param name="destIdx">The index in destination buffer</param>
|
|||
/// <param name="leftIdx">The local left index value</param>
|
|||
/// <param name="rightIdx">The local right index value</param>
|
|||
/// <returns>The weights</returns>
|
|||
public WeightsWindow GetWeightsWindow(int destIdx, int leftIdx, int rightIdx) |
|||
{ |
|||
return new WeightsWindow(destIdx, leftIdx, this.dataBuffer, rightIdx - leftIdx + 1); |
|||
} |
|||
} |
|||
} |
|||
} |
|||
@ -0,0 +1,53 @@ |
|||
// Copyright (c) Six Labors and contributors.
|
|||
// Licensed under the Apache License, Version 2.0.
|
|||
|
|||
using System; |
|||
|
|||
using SixLabors.ImageSharp.Memory; |
|||
|
|||
namespace SixLabors.ImageSharp.Processing.Processors |
|||
{ |
|||
/// <summary>
|
|||
/// Holds the <see cref="WeightsWindow"/> values in an optimized contigous memory region.
|
|||
/// </summary>
|
|||
internal class WeightsBuffer : IDisposable |
|||
{ |
|||
private readonly Buffer2D<float> dataBuffer; |
|||
|
|||
/// <summary>
|
|||
/// Initializes a new instance of the <see cref="WeightsBuffer"/> class.
|
|||
/// </summary>
|
|||
/// <param name="sourceSize">The size of the source window</param>
|
|||
/// <param name="destinationSize">The size of the destination window</param>
|
|||
public WeightsBuffer(int sourceSize, int destinationSize) |
|||
{ |
|||
this.dataBuffer = Buffer2D<float>.CreateClean(sourceSize, destinationSize); |
|||
this.Weights = new WeightsWindow[destinationSize]; |
|||
} |
|||
|
|||
/// <summary>
|
|||
/// Gets the calculated <see cref="Weights"/> values.
|
|||
/// </summary>
|
|||
public WeightsWindow[] Weights { get; } |
|||
|
|||
/// <summary>
|
|||
/// Disposes <see cref="WeightsBuffer"/> instance releasing it's backing buffer.
|
|||
/// </summary>
|
|||
public void Dispose() |
|||
{ |
|||
this.dataBuffer.Dispose(); |
|||
} |
|||
|
|||
/// <summary>
|
|||
/// Slices a weights value at the given positions.
|
|||
/// </summary>
|
|||
/// <param name="destIdx">The index in destination buffer</param>
|
|||
/// <param name="leftIdx">The local left index value</param>
|
|||
/// <param name="rightIdx">The local right index value</param>
|
|||
/// <returns>The weights</returns>
|
|||
public WeightsWindow GetWeightsWindow(int destIdx, int leftIdx, int rightIdx) |
|||
{ |
|||
return new WeightsWindow(destIdx, leftIdx, this.dataBuffer, rightIdx - leftIdx + 1); |
|||
} |
|||
} |
|||
} |
|||
@ -0,0 +1,150 @@ |
|||
// Copyright (c) Six Labors and contributors.
|
|||
// Licensed under the Apache License, Version 2.0.
|
|||
|
|||
using System; |
|||
using System.Numerics; |
|||
using System.Runtime.CompilerServices; |
|||
|
|||
using SixLabors.ImageSharp.Memory; |
|||
|
|||
namespace SixLabors.ImageSharp.Processing.Processors |
|||
{ |
|||
/// <summary>
|
|||
/// Points to a collection of of weights allocated in <see cref="WeightsBuffer"/>.
|
|||
/// </summary>
|
|||
internal struct WeightsWindow |
|||
{ |
|||
/// <summary>
|
|||
/// The local left index position
|
|||
/// </summary>
|
|||
public int Left; |
|||
|
|||
/// <summary>
|
|||
/// The length of the weights window
|
|||
/// </summary>
|
|||
public int Length; |
|||
|
|||
/// <summary>
|
|||
/// The index in the destination buffer
|
|||
/// </summary>
|
|||
private readonly int flatStartIndex; |
|||
|
|||
/// <summary>
|
|||
/// The buffer containing the weights values.
|
|||
/// </summary>
|
|||
private readonly Buffer<float> buffer; |
|||
|
|||
/// <summary>
|
|||
/// Initializes a new instance of the <see cref="WeightsWindow"/> struct.
|
|||
/// </summary>
|
|||
/// <param name="index">The destination index in the buffer</param>
|
|||
/// <param name="left">The local left index</param>
|
|||
/// <param name="buffer">The span</param>
|
|||
/// <param name="length">The length of the window</param>
|
|||
[MethodImpl(MethodImplOptions.AggressiveInlining)] |
|||
internal WeightsWindow(int index, int left, Buffer2D<float> buffer, int length) |
|||
{ |
|||
this.flatStartIndex = (index * buffer.Width) + left; |
|||
this.Left = left; |
|||
this.buffer = buffer; |
|||
this.Length = length; |
|||
} |
|||
|
|||
/// <summary>
|
|||
/// Gets a reference to the first item of the window.
|
|||
/// </summary>
|
|||
/// <returns>The reference to the first item of the window</returns>
|
|||
[MethodImpl(MethodImplOptions.AggressiveInlining)] |
|||
public ref float GetStartReference() |
|||
{ |
|||
return ref this.buffer[this.flatStartIndex]; |
|||
} |
|||
|
|||
/// <summary>
|
|||
/// Gets the span representing the portion of the <see cref="WeightsBuffer"/> that this window covers
|
|||
/// </summary>
|
|||
/// <returns>The <see cref="Span{T}"/></returns>
|
|||
[MethodImpl(MethodImplOptions.AggressiveInlining)] |
|||
public Span<float> GetWindowSpan() => this.buffer.Slice(this.flatStartIndex, this.Length); |
|||
|
|||
/// <summary>
|
|||
/// Computes the sum of vectors in 'rowSpan' weighted by weight values, pointed by this <see cref="WeightsWindow"/> instance.
|
|||
/// </summary>
|
|||
/// <param name="rowSpan">The input span of vectors</param>
|
|||
/// <param name="sourceX">The source row position.</param>
|
|||
/// <returns>The weighted sum</returns>
|
|||
[MethodImpl(MethodImplOptions.AggressiveInlining)] |
|||
public Vector4 ComputeWeightedRowSum(Span<Vector4> rowSpan, int sourceX) |
|||
{ |
|||
ref float horizontalValues = ref this.GetStartReference(); |
|||
int left = this.Left; |
|||
ref Vector4 vecPtr = ref Unsafe.Add(ref rowSpan.DangerousGetPinnableReference(), left + sourceX); |
|||
|
|||
// Destination color components
|
|||
Vector4 result = Vector4.Zero; |
|||
|
|||
for (int i = 0; i < this.Length; i++) |
|||
{ |
|||
float weight = Unsafe.Add(ref horizontalValues, i); |
|||
Vector4 v = Unsafe.Add(ref vecPtr, i); |
|||
result += v * weight; |
|||
} |
|||
|
|||
return result; |
|||
} |
|||
|
|||
/// <summary>
|
|||
/// Computes the sum of vectors in 'rowSpan' weighted by weight values, pointed by this <see cref="WeightsWindow"/> instance.
|
|||
/// Applies <see cref="Vector4Extensions.Expand(float)"/> to all input vectors.
|
|||
/// </summary>
|
|||
/// <param name="rowSpan">The input span of vectors</param>
|
|||
/// <param name="sourceX">The source row position.</param>
|
|||
/// <returns>The weighted sum</returns>
|
|||
[MethodImpl(MethodImplOptions.AggressiveInlining)] |
|||
public Vector4 ComputeExpandedWeightedRowSum(Span<Vector4> rowSpan, int sourceX) |
|||
{ |
|||
ref float horizontalValues = ref this.GetStartReference(); |
|||
int left = this.Left; |
|||
ref Vector4 vecPtr = ref Unsafe.Add(ref rowSpan.DangerousGetPinnableReference(), left + sourceX); |
|||
|
|||
// Destination color components
|
|||
Vector4 result = Vector4.Zero; |
|||
|
|||
for (int i = 0; i < this.Length; i++) |
|||
{ |
|||
float weight = Unsafe.Add(ref horizontalValues, i); |
|||
Vector4 v = Unsafe.Add(ref vecPtr, i); |
|||
result += v.Expand() * weight; |
|||
} |
|||
|
|||
return result; |
|||
} |
|||
|
|||
/// <summary>
|
|||
/// Computes the sum of vectors in 'firstPassPixels' at a row pointed by 'x',
|
|||
/// weighted by weight values, pointed by this <see cref="WeightsWindow"/> instance.
|
|||
/// </summary>
|
|||
/// <param name="firstPassPixels">The buffer of input vectors in row first order</param>
|
|||
/// <param name="x">The row position</param>
|
|||
/// <param name="sourceY">The source column position.</param>
|
|||
/// <returns>The weighted sum</returns>
|
|||
[MethodImpl(MethodImplOptions.AggressiveInlining)] |
|||
public Vector4 ComputeWeightedColumnSum(Buffer2D<Vector4> firstPassPixels, int x, int sourceY) |
|||
{ |
|||
ref float verticalValues = ref this.GetStartReference(); |
|||
int left = this.Left; |
|||
|
|||
// Destination color components
|
|||
Vector4 result = Vector4.Zero; |
|||
|
|||
for (int i = 0; i < this.Length; i++) |
|||
{ |
|||
float yw = Unsafe.Add(ref verticalValues, i); |
|||
int index = left + i + sourceY; |
|||
result += firstPassPixels[x, index] * yw; |
|||
} |
|||
|
|||
return result; |
|||
} |
|||
} |
|||
} |
|||
Loading…
Reference in new issue