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/*
* GNU AFFERO GENERAL PUBLIC LICENSE
* Version 3, 19 November 2007
* Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
* Everyone is permitted to copy and distribute verbatim copies
* of this license document, but changing it is not allowed.
*/
using Emgu.CV;
using Emgu.CV.CvEnum;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Xml.Serialization;
using UVtools.Core.Extensions;
using UVtools.Core.Managers;
namespace UVtools.Core.Objects;
[Serializable]
public sealed class KernelConfiguration : BindableBase, IDisposable
{
#region Members
private bool _useDynamicKernel;
private readonly KernelCacheManager _kernelCache = new();
private ElementShape _kernelShape = ElementShape.Rectangle;
private uint _matrixWidth = 3;
private uint _matrixHeight = 3;
private string _matrixText = "1 1 1\n1 1 1\n1 1 1";
private int _anchorX = -1;
private int _anchorY = -1;
private Mat? _kernelMat;
private readonly object _mutex = new();
#endregion
#region Properties
public bool UseDynamicKernel
{
get => _useDynamicKernel;
set
{
if(!RaiseAndSetIfChanged(ref _useDynamicKernel, value)) return;
_kernelCache.UseDynamicKernel = value;
}
}
public int AnchorX
{
get => _anchorX;
set => RaiseAndSetIfChanged(ref _anchorX, value);
}
public int AnchorY
{
get => _anchorY;
set => RaiseAndSetIfChanged(ref _anchorY, value);
}
public string MatrixText
{
get => _matrixText;
set => RaiseAndSetIfChanged(ref _matrixText, value);
}
public uint MatrixWidth
{
get => _matrixWidth;
set => RaiseAndSetIfChanged(ref _matrixWidth, value);
}
public uint MatrixHeight
{
get => _matrixHeight;
set => RaiseAndSetIfChanged(ref _matrixHeight, value);
}
public Size MatrixSize => new((int)_matrixWidth, (int)_matrixHeight);
[XmlIgnore]
public Mat? KernelMat
{
get
{
lock (_mutex)
{
if (_kernelMat is null)
{
if (!string.IsNullOrWhiteSpace(_matrixText))
{
GenerateKernelFromText();
}
else
{
SetKernel(ElementShape.Rectangle);
}
}
}
return _kernelMat;
}
set => _kernelMat = value;
}
public ElementShape KernelShape
{
get => _kernelShape;
set => RaiseAndSetIfChanged(ref _kernelShape, value);
}
public IEnumerable<ElementShape> KernelShapes => ((ElementShape[])Enum.GetValues(typeof(ElementShape))).Where(element => element != ElementShape.Custom);
public Point Anchor
{
get => new(_anchorX, _anchorY);
set
{
_anchorX = value.X;
_anchorY = value.Y;
}
}
#endregion
#region Constructor
public KernelConfiguration() { }
#endregion
#region Methods
public void ResetKernel()
{
KernelShape = ElementShape.Rectangle;
MatrixWidth = 3;
MatrixHeight = 3;
AnchorX = -1;
AnchorY = -1;
_kernelMat?.Dispose();
_kernelMat = null;
MatrixText = "1 1 1\n1 1 1\n1 1 1";
}
public void GenerateKernelText()
{
using var kernel = CvInvoke.GetStructuringElement(KernelShape, MatrixSize, Anchor);
string text = string.Empty;
for (int y = 0; y < kernel.Height; y++)
{
var span = kernel.GetRowSpan<byte>(y);
var line = string.Empty;
for (int x = 0; x < span.Length; x++)
{
line += $" {span[x]}";
}
line = line.Remove(0, 1);
text += line;
if (y < kernel.Height - 1)
{
text += '\n';
}
}
MatrixText = text;
}
public void GenerateKernelFromText()
{
if (string.IsNullOrEmpty(_matrixText))
{
throw new InvalidOperationException("Invalid kernel: Kernel can't be empty.");
}
Matrix<byte> matrix = null!;
var lines = _matrixText.Split('\n');
for (var row = 0; row < lines.Length; row++)
{
var bytes = lines[row].Trim().Split(' ');
if (row == 0)
{
matrix = new Matrix<byte>(lines.Length, bytes.Length);
}
else
{
if (matrix.Cols != bytes.Length)
{
matrix.Dispose();
throw new InvalidOperationException($"Invalid kernel: Row {row + 1} have invalid number of columns, the matrix must have equal columns count per line, per defined on line 1");
}
}
for (int col = 0; col < bytes.Length; col++)
{
if (byte.TryParse(bytes[col], out var value))
{
matrix[row, col] = value;
}
else
{
matrix.Dispose();
throw new InvalidOperationException($"Invalid kernel: {bytes[col]} is a invalid number, use values from 0 to 255");
}
}
}
if (matrix.Cols <= _anchorX || matrix.Rows <= _anchorY)
{
matrix.Dispose();
throw new InvalidOperationException("Invalid kernel: Anchor position X/Y can't be higher or equal than kernel columns/rows\nPlease fix the values.");
}
_kernelMat?.Dispose();
KernelMat = matrix.Mat;
}
public void SetKernel(ElementShape shape, Size size, Point anchor)
{
KernelMat = CvInvoke.GetStructuringElement(shape, size, anchor);
}
public void SetKernel(ElementShape shape, Size size) => SetKernel(shape, size, new Point(-1, -1));
public void SetKernel(ElementShape shape) => SetKernel(shape, new Size(3, 3), new Point(-1, -1));
public Mat? GetKernel()
{
return KernelMat;
}
public Mat? GetKernel(ref int iterations)
{
if (!UseDynamicKernel) return KernelMat;
return _kernelCache.Get(ref iterations);
}
public void Dispose()
{
_kernelMat?.Dispose();
_kernelCache?.Dispose();
}
#endregion
}
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