Merge pull request #3 from michaldivis/vNext

v1.1.0

README.md

@@ -1,4 +1,4 @@
-<img src="assets/icon.png?raw=true" width="200">
+<img src="assets/icon.png?raw=true" width="200">
 
 # Dark Colors
 
@@ -88,4 +88,30 @@ var twoColorsCombined = ColorBlender.Combine(baseColor, colorToAdd);
 var baseColor = Color.FromArgb(0, 0, 0);
 var colorToAdd = Color.FromArgb(125, 55, 13);
 var twoColorsCombined = baseColor.Combine(colorToAdd);
-```
+```
+
+## Color analyzer
+
+⚠️ Warning: this feature is pretty slow at the moment. It can process roughly one mega pixel per second, so it's not recommended to use it on large images.
+
+Find dominant color in an image.
+
+<img src="assets/sample_screenshot_analyzer.png?raw=true">
+
+### Basic usage
+```csharp
+//array of pixels that represents an image
+Color[] pixels; 
+//returns a list of dominant color candidates, ordered by probability
+List<DominantColorCandidate> candidates = ColorAnalyzer.FindDominantColors(pixels); 
+```
+
+### Advanced (with configuration)
+```csharp
+Color[] pixels;
+List<DominantColorCandidate> candidates = ColorAnalyzer.FindDominantColors(pixels, options => 
+{
+	options.MinSaturation = 0.4f,
+	options.MinSpaceCoverage = 0.05f,
+	options.ColorGrouping = 0.3f
+});

sample/SampleApp/BitmapUtils.cs

@@ -0,0 +1,32 @@
+using SkiaSharp.Views.Desktop;
+using System.Drawing;
+using System.IO;
+using System.Linq;
+using System.Windows.Media.Imaging;
+
+namespace SampleApp;
+
+public static class BitmapUtils
+{
+    public static Color[] GetPixels(Bitmap bitmap)
+    {
+        return bitmap.ToSKBitmap().Pixels
+            .Select(x => x.ToDrawingColor())
+            .ToArray();
+    }
+
+    public static BitmapImage BitmapToImageSource(Bitmap bitmap)
+    {
+        using MemoryStream memory = new MemoryStream();
+
+        bitmap.Save(memory, System.Drawing.Imaging.ImageFormat.Bmp);
+        memory.Position = 0;
+        BitmapImage bitmapimage = new BitmapImage();
+        bitmapimage.BeginInit();
+        bitmapimage.StreamSource = memory;
+        bitmapimage.CacheOption = BitmapCacheOption.OnLoad;
+        bitmapimage.EndInit();
+
+        return bitmapimage;
+    }
+}

sample/SampleApp/ColorAnalyzerOptionsExample.cs

@@ -0,0 +1,58 @@
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using DarkColors;
+using System.Collections.ObjectModel;
+using System.Drawing;
+using System.Linq;
+using System.Windows.Media.Imaging;
+
+namespace SampleApp;
+
+public partial class ColorAnalyzerExample : ObservableObject
+{
+    public class DemoImage
+    {
+        public BitmapImage? BitmapSource { get; set; }
+        public Color[] Pixels { get; set; }
+        public ObservableCollection<DominantColorCandidate> Candidates { get; set; } = new();
+    }
+
+    public DominantColorAnalyzerOptions Options { get; } = new()
+    {
+        MaxCandidateCount = 5
+    };
+
+    public ObservableCollection<DemoImage> Images { get; } = new();
+
+    public ColorAnalyzerExample(Bitmap[] bitmaps)
+    {
+        var images = bitmaps.Select(x => new DemoImage
+        {
+            BitmapSource = BitmapUtils.BitmapToImageSource(x),
+            Pixels = BitmapUtils.GetPixels(x)
+        });
+
+        foreach (var image in images)
+        {
+            Images.Add(image);
+        }
+
+        UpdateCandidates();
+    }
+
+    [RelayCommand]
+    private void UpdateCandidates()
+    {
+        foreach (var result in Images)
+        {
+            result.Candidates.Clear();
+
+            var candidates = ColorAnalyzer.FindDominantColors(result.Pixels, Options);
+
+            foreach (var candidate in candidates)
+            {
+                result.Candidates.Add(candidate);
+            }
+        }
+    }
+}

sample/SampleApp/ColorBlendingExample.cs

@@ -17,4 +17,4 @@ public ColorBlendingExample(string Title, Color baseColor, params ColorLayer[] l
         Layers = layers;
         ResultColor = ColorBlender.Combine(baseColor, layers);        
     }
-}
+}

sample/SampleApp/MainViewModel.cs

@@ -1,34 +1,40 @@
 using DarkColors;
+using SampleApp.Properties;
 using System.Collections.Generic;
 using System.Drawing;
 
 namespace SampleApp;
 
 public class MainViewModel
 {
-    public List<ColorBlendingExample> Examples { get; } = new();
+    public List<ColorBlendingExample> ColorBlendingExamples { get; } = new();
+    public ColorAnalyzerExample ColorAnalyzerExample { get; }
 
     public MainViewModel()
     {
-        Examples.Add(new ColorBlendingExample("A bit of gray", Hex("#000"), new ColorLayer(Hex("#fff"), 25)));
-        Examples.Add(new ColorBlendingExample("Fifty shades", Hex("#000"), new ColorLayer(Hex("#fff"), 50)));
-        Examples.Add(new ColorBlendingExample("Bright green", Hex("#007d40"), new ColorLayer(Hex("#fff"), 75)));
+        ColorBlendingExamples.Add(new ColorBlendingExample("A bit of gray", Hex("#000"), new ColorLayer(Hex("#fff"), 25)));
+        ColorBlendingExamples.Add(new ColorBlendingExample("Fifty shades", Hex("#000"), new ColorLayer(Hex("#fff"), 50)));
+        ColorBlendingExamples.Add(new ColorBlendingExample("Bright green", Hex("#007d40"), new ColorLayer(Hex("#fff"), 75)));
 
-        Examples.Add(new ColorBlendingExample("Is it blue or purple?", Hex("#000"), new ColorLayer(Hex("#4056F4"), 60)));
+        ColorBlendingExamples.Add(new ColorBlendingExample("Is it blue or purple?", Hex("#000"), new ColorLayer(Hex("#4056F4"), 60)));
 
-        Examples.Add(new ColorBlendingExample("More than two colors", Hex("#007d40"), new ColorLayer[]
+        ColorBlendingExamples.Add(new ColorBlendingExample("More than two colors", Hex("#007d40"), new ColorLayer[]
         {
             new ColorLayer(Hex("#4056F4"), 42),
             new ColorLayer(Hex("#B1740F"), 28)
         }));
 
-        Examples.Add(new ColorBlendingExample("Both alpha transparency and amount percentage used", Hex("#000"), new ColorLayer(Hex("#804056F4"), 55)));
+        ColorBlendingExamples.Add(new ColorBlendingExample("Both alpha transparency and amount percentage used", Hex("#000"), new ColorLayer(Hex("#804056F4"), 55)));
 
-        Examples.Add(new ColorBlendingExample("Combo - both alpha transparency and amount percentage used for multiple colors", Hex("#007d40"), new ColorLayer[]
+        ColorBlendingExamples.Add(new ColorBlendingExample("Combo - both alpha transparency and amount percentage used for multiple colors", Hex("#007d40"), new ColorLayer[]
         {
             new ColorLayer(Hex("#804056F4"), 71),
             new ColorLayer(Hex("#5CB1740F"), 20)
         }));
+
+        var demoBitmaps = new[] { Resources.vildhjarta, Resources.rivers, Resources.abovebelow, Resources.greylotus, Resources.currents, Resources.dali, Resources.metallica, Resources.northlane };
+
+        ColorAnalyzerExample = new(demoBitmaps);
     }
 
     private static Color Hex(string hex)