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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 System;
using System.Collections;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.IO;
using System.Runtime.InteropServices;
using System.Threading.Tasks;
using UVtools.Parser.Extensions;
using SixLabors.ImageSharp;
using SixLabors.ImageSharp.PixelFormats;
using Point = System.Drawing.Point;
using Rectangle = System.Drawing.Rectangle;
namespace UVtools.Parser
{
#region LayerIssue Class
public class LayerIssue : IEnumerable<Point>
{
public enum IssueType : byte
{
Island,
ResinTrap,
TouchingBound,
//HoleSandwich,
}
/// <summary>
/// Gets the parent layer
/// </summary>
public Layer Layer { get; }
/// <summary>
/// Gets the issue type associated
/// </summary>
public IssueType Type { get; }
/// <summary>
/// Gets the pixels containing the issue
/// </summary>
public Point[] Pixels { get; }
/// <summary>
/// Gets the bounding rectangle of the pixel area
/// </summary>
public Rectangle BoundingRectangle { get; }
/// <summary>
/// Gets the X coordinate for the first point, -1 if doesn't exists
/// </summary>
public int X => HaveValidPoint ? Pixels[0].X : -1;
/// <summary>
/// Gets the Y coordinate for the first point, -1 if doesn't exists
/// </summary>
public int Y => HaveValidPoint ? Pixels[0].Y : -1;
/// <summary>
/// Gets the XY point for first point
/// </summary>
public Point Point => HaveValidPoint ? Pixels[0] : new Point(-1, -1);
/// <summary>
/// Gets the number of pixels on this issue
/// </summary>
public uint Size => (uint) (Pixels?.Length ?? 0);
/// <summary>
/// Check if this issue have a valid start point to show
/// </summary>
public bool HaveValidPoint => !ReferenceEquals(Pixels, null) && Pixels.Length > 0;
public LayerIssue(Layer layer, IssueType type, Point[] pixels = null, Rectangle boundingRectangle = new Rectangle())
{
Layer = layer;
Type = type;
Pixels = pixels;
BoundingRectangle = boundingRectangle;
}
public Point this[uint index] => Pixels[index];
public Point this[int index] => Pixels[index];
public IEnumerator<Point> GetEnumerator()
{
return ((IEnumerable<Point>)Pixels).GetEnumerator();
}
IEnumerator IEnumerable.GetEnumerator()
{
return GetEnumerator();
}
public override string ToString()
{
return $"{nameof(Type)}: {Type}";
}
}
#endregion
#region LayerHollowArea
public class LayerHollowArea : IEnumerable<Point>
{
public enum AreaType : byte
{
Unknown = 0,
Trap,
Drain
}
/// <summary>
/// Gets area pixels
/// </summary>
public Point[] Contour { get; }
public System.Drawing.Rectangle BoundingRectangle { get; }
public AreaType Type { get; set; } = AreaType.Unknown;
#region Indexers
public Point this[uint index]
{
get => index < Contour.Length ? Contour[index] : Point.Empty;
set => Contour[index] = value;
}
public Point this[int index]
{
get => index < Contour.Length ? Contour[index] : Point.Empty;
set => Contour[index] = value;
}
public Point this[uint x, uint y]
{
get
{
for (uint i = 0; i < Contour.Length; i++)
{
if (Contour[i].X == x && Contour[i].Y == y) return Contour[i];
}
return Point.Empty;
}
}
public Point this[int x, int y] => this[(uint) x, (uint)y];
public Point this[Point point] => this[point.X, point.Y];
#endregion
public IEnumerator<Point> GetEnumerator()
{
return ((IEnumerable<Point>)Contour).GetEnumerator();
}
IEnumerator IEnumerable.GetEnumerator()
{
return GetEnumerator();
}
public LayerHollowArea()
{
}
public LayerHollowArea(Point[] contour, System.Drawing.Rectangle boundingRectangle, AreaType type = AreaType.Unknown)
{
Contour = contour;
BoundingRectangle = boundingRectangle;
Type = type;
}
}
#endregion
#region Layer Class
/// <summary>
/// Represent a Layer
/// </summary>
public class Layer : IEquatable<Layer>, IEquatable<uint>
{
#region Properties
/// <summary>
/// Gets the parent layer manager
/// </summary>
public LayerManager ParentLayerManager { get; set; }
/// <summary>
/// Gets the layer index
/// </summary>
public uint Index { get; }
private byte[] _rawData;
/// <summary>
/// Gets or sets layer image compressed data
/// </summary>
public byte[] RawData
{
get => LayerManager.DecompressLayer(_rawData);
set
{
_rawData = LayerManager.CompressLayer(value);
IsModified = true;
}
}
/// <summary>
/// Gets the original filename, null if no filename attached with layer
/// </summary>
public string Filename { get; set; }
/// <summary>
/// Gets if layer has been modified
/// </summary>
public bool IsModified { get; set; }
/// <summary>
/// Gets or sets a new image instance
/// </summary>
public Image<L8> Image
{
get => SixLabors.ImageSharp.Image.Load<L8>(RawData);
set
{
using (MemoryStream stream = new MemoryStream())
{
value.Save(stream, Helpers.PngEncoder);
RawData = stream.ToArray();
}
}
}
/// <summary>
/// Gets a new RGBA image instance
/// </summary>
public Image<Rgba32> ImageRbga32 => Image.CloneAs<Rgba32>();
#endregion
#region Constructor
public Layer(uint index, byte[] rawData, string filename = null, LayerManager pararentLayerManager = null)
{
Index = index;
RawData = rawData;
Filename = filename ?? $"Layer{index}.png";
IsModified = false;
ParentLayerManager = pararentLayerManager;
}
public Layer(uint index, Image<L8> image, string filename = null, LayerManager pararentLayerManager = null) : this(index, new byte[0], filename, pararentLayerManager)
{
Image = image;
IsModified = false;
}
public Layer(uint index, Stream stream, string filename = null, LayerManager pararentLayerManager = null) : this(index, stream.ToArray(), filename, pararentLayerManager)
{ }
#endregion
#region Equatables
public static bool operator ==(Layer obj1, Layer obj2)
{
return obj1.Equals(obj2);
}
public static bool operator !=(Layer obj1, Layer obj2)
{
return !obj1.Equals(obj2);
}
public static bool operator >(Layer obj1, Layer obj2)
{
return obj1.Index > obj2.Index;
}
public static bool operator <(Layer obj1, Layer obj2)
{
return obj1.Index < obj2.Index;
}
public static bool operator >=(Layer obj1, Layer obj2)
{
return obj1.Index >= obj2.Index;
}
public static bool operator <=(Layer obj1, Layer obj2)
{
return obj1.Index <= obj2.Index;
}
public bool Equals(uint other)
{
return Index == other;
}
public bool Equals(Layer other)
{
if (ReferenceEquals(null, other)) return false;
if (ReferenceEquals(this, other)) return true;
return Equals(_rawData, other._rawData);
}
public override bool Equals(object obj)
{
if (ReferenceEquals(null, obj)) return false;
if (ReferenceEquals(this, obj)) return true;
if (obj.GetType() != this.GetType()) return false;
return Equals((Layer)obj);
}
public override int GetHashCode()
{
return (_rawData != null ? _rawData.GetHashCode() : 0);
}
private sealed class IndexRelationalComparer : IComparer<Layer>
{
public int Compare(Layer x, Layer y)
{
if (ReferenceEquals(x, y)) return 0;
if (ReferenceEquals(null, y)) return 1;
if (ReferenceEquals(null, x)) return -1;
return x.Index.CompareTo(y.Index);
}
}
public static IComparer<Layer> IndexComparer { get; } = new IndexRelationalComparer();
#endregion
#region Formaters
public override string ToString()
{
return $"{nameof(Index)}: {Index}, {nameof(Filename)}: {Filename}, {nameof(IsModified)}: {IsModified}";
}
#endregion
#region Methods
public Layer PreviousLayer()
{
if (ReferenceEquals(ParentLayerManager, null) || Index == 0)
return null;
return ParentLayerManager[Index - 1];
}
public Layer NextLayer()
{
if (ReferenceEquals(ParentLayerManager, null) || Index >= ParentLayerManager.Count - 1)
return null;
return ParentLayerManager[Index + 1];
}
/// <summary>
/// Gets all islands start pixel location for this layer
/// https://www.geeksforgeeks.org/find-number-of-islands/
/// </summary>
/// <returns><see cref="List{T}"/> holding all islands coordinates</returns>
public List<LayerIssue> GetIssues(uint requiredPixelsToSupportIsland = 5)
{
if (requiredPixelsToSupportIsland == 0)
requiredPixelsToSupportIsland = 1;
// These arrays are used to
// get row and column numbers
// of 8 neighbors of a given cell
List<LayerIssue> result = new List<LayerIssue>();
List<Point> pixels = new List<Point>();
var image = Image;
byte[] bytes = null;
if (image.TryGetSinglePixelSpan(out var pixelSpan))
{
bytes = MemoryMarshal.AsBytes(pixelSpan).ToArray();
}
var previousLayerImage = PreviousLayer()?.Image;
byte[] previousBytes = null;
if (!ReferenceEquals(previousLayerImage, null))
{
if (previousLayerImage.TryGetSinglePixelSpan(out var previousPixelSpan))
{
previousBytes = MemoryMarshal.AsBytes(previousPixelSpan).ToArray();
}
}
/*var nextLayerImage = NextLayer()?.Image;
byte[] nextBytes = null;
if (!ReferenceEquals(nextLayerImage, null))
{
if (nextLayerImage.TryGetSinglePixelSpan(out var nextPixelSpan))
{
nextBytes = MemoryMarshal.AsBytes(nextPixelSpan).ToArray();
}
}*/
// Make a bool array to
// mark visited cells.
// Initially all cells
// are unvisited
bool[,] visited = new bool[image.Width, image.Height];
// Initialize count as 0 and
// traverse through the all
// cells of given matrix
//uint count = 0;
// Island checker
sbyte[] rowNbr = { -1, -1, -1, 0, 0, 1, 1, 1 };
sbyte[] colNbr = { -1, 0, 1, -1, 1, -1, 0, 1 };
const uint minPixel = 10;
const uint minPixelForSupportIsland = 200;
int pixelIndex;
uint islandSupportingPixels;
if (Index > 0)
{
for (int y = 0; y < image.Height; y++)
{
for (int x = 0; x < image.Width; x++)
{
pixelIndex = y * image.Width + x;
/*if (bytes[pixelIndex] == 0 && previousBytes?[pixelIndex] == byte.MaxValue &&
nextBytes?[pixelIndex] == byte.MaxValue)
{
result.Add(new LayerIssue(this, LayerIssue.IssueType.HoleSandwich, new []{new Point(x, y)}));
}*/
if (bytes[pixelIndex] > minPixel && !visited[x, y])
{
// If a cell with value 1 is not
// visited yet, then new island
// found, Visit all cells in this
// island and increment island count
pixels.Clear();
pixels.Add(new Point(x, y));
islandSupportingPixels = previousBytes[pixelIndex] >= minPixelForSupportIsland ? 1u : 0;
int minX = x;
int maxX = x;
int minY = y;
int maxY = y;
int x2;
int y2;
Queue<Point> queue = new Queue<Point>();
queue.Enqueue(new Point(x, y));
// Mark this cell as visited
visited[x, y] = true;
while (queue.Count > 0)
{
var point = queue.Dequeue();
y2 = point.Y;
x2 = point.X;
for (byte k = 0; k < 8; k++)
{
//if (isSafe(y2 + rowNbr[k], x2 + colNbr[k]))
var tempy2 = y2 + rowNbr[k];
var tempx2 = x2 + colNbr[k];
pixelIndex = tempy2 * image.Width + tempx2;
if (tempy2 >= 0 &&
tempy2 < image.Height &&
tempx2 >= 0 && tempx2 < image.Width &&
bytes[pixelIndex] >= minPixel &&
!visited[tempx2, tempy2])
{
visited[tempx2, tempy2] = true;
point = new Point(tempx2, tempy2);
pixels.Add(point);
queue.Enqueue(point);
minX = Math.Min(minX, tempx2);
maxX = Math.Max(maxX, tempx2);
minY = Math.Min(minY, tempy2);
maxY = Math.Max(maxY, tempy2);
islandSupportingPixels += previousBytes[pixelIndex] >= minPixelForSupportIsland ? 1u : 0;
}
}
}
//count++;
if (islandSupportingPixels >= requiredPixelsToSupportIsland)
continue; // Not a island, bounding is strong
if (islandSupportingPixels > 0 && pixels.Count < requiredPixelsToSupportIsland &&
islandSupportingPixels >= Math.Max(1, pixels.Count / 2)) continue; // Not a island
result.Add(new LayerIssue(this, LayerIssue.IssueType.Island, pixels.ToArray(), new Rectangle(minX, minY, maxX-minX, maxY-minY)));
}
}
}
}
pixels.Clear();
// TouchingBounds Checker
for (int x = 0; x < image.Width; x++) // Check Top and Bottom bounds
{
if (bytes[x] >= 200) // Top
{
pixels.Add(new Point(x, 0));
}
if (bytes[image.Width * image.Height - image.Width + x] >= 200) // Bottom
{
pixels.Add(new Point(x, image.Height-1));
}
}
for (int y = 0; y < image.Height; y++) // Check Left and Right bounds
{
if (bytes[y * image.Width] >= 200) // Left
{
pixels.Add(new Point(0, y));
}
if (bytes[y * image.Width + image.Width - 1] >= 200) // Right
{
pixels.Add(new Point(image.Width-1, y));
}
}
if (pixels.Count > 0)
{
result.Add(new LayerIssue(this, LayerIssue.IssueType.TouchingBound, pixels.ToArray()));
}
pixels.Clear();
return result;
}
public Layer Clone()
{
return new Layer(Index, RawData, Filename, ParentLayerManager);
}
#endregion
}
#endregion
#region LayerManager Class
public class LayerManager : IEnumerable<Layer>
{
#region Properties
/// <summary>
/// Layers List
/// </summary>
public Layer[] Layers { get; }
/// <summary>
/// Gets the layers count
/// </summary>
public uint Count => (uint) Layers.Length;
/// <summary>
/// Gets if any layer got modified, otherwise false
/// </summary>
public bool IsModified
{
get
{
for (uint i = 0; i < Count; i++)
{
if (Layers[i].IsModified) return true;
}
return false;
}
}
#endregion
#region Constructors
public LayerManager(uint layerCount)
{
Layers = new Layer[layerCount];
}
#endregion
#region Indexers
public Layer this[uint index]
{
get => Layers[index];
set => AddLayer(index, value);
}
public Layer this[int index]
{
get => Layers[index];
set => AddLayer((uint) index, value);
}
public Layer this[long index]
{
get => Layers[index];
set => AddLayer((uint) index, value);
}
#endregion
#region Numerators
public IEnumerator<Layer> GetEnumerator()
{
return ((IEnumerable<Layer>)Layers).GetEnumerator();
}
IEnumerator IEnumerable.GetEnumerator()
{
return GetEnumerator();
}
#endregion
#region Static Methods
/// <summary>
/// Compress a layer from a <see cref="Stream"/>
/// </summary>
/// <param name="input"><see cref="Stream"/> to compress</param>
/// <returns>Compressed byte array</returns>
public static byte[] CompressLayer(Stream input)
{
return CompressLayer(input.ToArray());
}
/// <summary>
/// Compress a layer from a byte array
/// </summary>
/// <param name="input">byte array to compress</param>
/// <returns>Compressed byte array</returns>
public static byte[] CompressLayer(byte[] input)
{
return input;
/*using (MemoryStream output = new MemoryStream())
{
using (DeflateStream dstream = new DeflateStream(output, CompressionLevel.Optimal))
{
dstream.Write(input, 0, input.Length);
}
return output.ToArray();
}*/
}
/// <summary>
/// Decompress a layer from a byte array
/// </summary>
/// <param name="input">byte array to decompress</param>
/// <returns>Decompressed byte array</returns>
public static byte[] DecompressLayer(byte[] input)
{
return input;
/*using (MemoryStream ms = new MemoryStream(input))
{
using (MemoryStream output = new MemoryStream())
{
using (DeflateStream dstream = new DeflateStream(ms, CompressionMode.Decompress))
{
dstream.CopyTo(output);
}
return output.ToArray();
}
}*/
}
#endregion
#region Methods
/// <summary>
/// Add a layer
/// </summary>
/// <param name="index">Layer index</param>
/// <param name="layer">Layer to add</param>
public void AddLayer(uint index, Layer layer)
{
Layers[index] = layer;
layer.ParentLayerManager = this;
}
/// <summary>
/// Get layer given index
/// </summary>
/// <param name="index">Layer index</param>
/// <returns></returns>
public Layer GetLayer(uint index)
{
return Layers[index];
}
public ConcurrentDictionary<uint, List<LayerIssue>> GetAllIssues()
{
var result = new ConcurrentDictionary<uint, List<LayerIssue>>();
Parallel.ForEach(this, layer =>
{
var issues = layer.GetIssues();
if (issues.Count > 0)
{
if (!result.TryAdd(layer.Index, issues))
{
throw new AccessViolationException("Error while trying to add an issue to the dictionary, please try again.");
}
}
});
/*const byte minPixel = 50;
sbyte[] rowNbr = { -1, -1, -1, 0, 0, 1, 1, 1 };
sbyte[] colNbr = { -1, 0, 1, -1, 1, -1, 0, 1 };
int pixelIndex;
for (uint layerindex = 0; layerindex < Count; layerindex++)
{
var image = this[layerindex].Image;
byte[] bytes = null;
if (image.TryGetSinglePixelSpan(out var pixelSpan))
{
bytes = MemoryMarshal.AsBytes(pixelSpan).ToArray();
}
bool[,] visited = new bool[image.Width, image.Height];
for (int y = 0; y < image.Height; y++)
{
for (int x = 0; x < image.Width; x++)
{
pixelIndex = y * image.Width + x;
if (bytes[pixelIndex] > minPixel && !visited[y, x])
{
Queue<Point> queue = new Queue<Point>();
queue.Enqueue(new Point(x, y));
// Mark this cell as visited
visited[x, y] = true;
var x2 = x;
var y2 = y;
while (queue.Count > 0)
{
var point = queue.Dequeue();
y2 = point.Y;
x2 = point.X;
for (byte k = 0; k < 8; k++)
{
//if (isSafe(y2 + rowNbr[k], x2 + colNbr[k]))
var tempy2 = y2 + rowNbr[k];
var tempx2 = x2 + colNbr[k];
pixelIndex = tempy2 * image.Width + tempx2;
if (tempy2 >= 0 &&
tempy2 < image.Height &&
tempx2 >= 0 && tempx2 < image.Width &&
bytes[pixelIndex] >= minPixel &&
!visited[tempx2, tempy2])
{
visited[tempx2, tempy2] = true;
point = new Point(tempx2, tempy2);
pixels.Add(point);
queue.Enqueue(point);
islandSupportingPixels += previousBytes[pixelIndex] >= minPixelForSupportIsland ? 1u : 0;
}
}
}
}
}
}
}*/
return result;
}
/// <summary>
/// Desmodify all layers
/// </summary>
public void Desmodify()
{
for (uint i = 0; i < Count; i++)
{
Layers[i].IsModified = false;
}
}
/// <summary>
/// Clone this object
/// </summary>
/// <returns></returns>
public LayerManager Clone()
{
LayerManager layerManager = new LayerManager(Count);
foreach (var layer in this)
{
layerManager[layer.Index] = layer.Clone();
}
return layerManager;
}
#endregion
}
#endregion
}
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