Merge pull request #1 from Walter-Rabbit/feat/tests

Feat/tests

Author: Walter-Rabbit

Source/RedPixel.Core/ImageFormat.cs

@@ -5,15 +5,15 @@ namespace RedPixel.Core;
 
 public class ImageFormat
 {
+    public static readonly ImageFormat Png = new(
+        "png",
+        HeaderMatchFuncFactory.Create(new byte[] { 137, 80, 78, 71, 13, 10, 26, 10 }));
+    
     public static readonly ImageFormat Pnm = new(
         "pnm",
         HeaderMatchFuncFactory.Create(new byte[] { 80, 53 }, new byte[] { 80, 54 }),
         "pgm", "ppm");
 
-    public static readonly ImageFormat Png = new(
-        "png",
-        HeaderMatchFuncFactory.Create(new byte[] { 137, 80, 78, 71, 13, 10, 26, 10 }));
-
     private readonly Func<Stream, bool> _matchFunc;
 
     private ImageFormat(string format, Func<Stream, bool> matchFunc, params string[] alternatives)

Source/RedPixel.Core/Models/Bitmap.cs

@@ -1,5 +1,4 @@
-using System.Buffers;
-using RedPixel.Core.Colors;
+using RedPixel.Core.Colors;
 using RedPixel.Core.Colors.ValueObjects;
 using RedPixel.Core.Tools;
 
@@ -61,7 +60,7 @@ public double[][] GetHistogram(int fromX, int toX, int fromY, int toY)
 
         for (int i = 0; i < 3; i++)
         {
-            histogramValues[i] = new double[BytesForColor*256];
+            histogramValues[i] = new double[BytesForColor * 256];
             histogramValues[i].AsSpan().Fill(0);
         }
 
@@ -126,4 +125,28 @@ public void ApplyContrastAdjustment(float ignorePart)
             }
         }
     }
+
+    public override bool Equals(object obj)
+    {
+        if (obj is not Bitmap bitmap)
+        {
+            return false;
+        }
+
+        const double eps = 1;
+        for (int y = 0; y < Height; y++)
+        {
+            for (int x = 0; x < Width; x++)
+            {
+                if (Math.Abs(Matrix[y, x].FirstComponent - bitmap.Matrix[y, x].FirstComponent) > eps ||
+                    Math.Abs(Matrix[y, x].SecondComponent - bitmap.Matrix[y, x].SecondComponent) > eps ||
+                    Math.Abs(Matrix[y, x].ThirdComponent - bitmap.Matrix[y, x].ThirdComponent) > eps)
+                {
+                    return false;
+                }
+            }
+        }
+
+        return true;
+    }
 }