优化替换的逻辑

Author: lindexi

src/MediaConverters/MediaConverters.Lib/Imaging/Effects/BitmapEffectExtension.cs

@@ -67,6 +67,27 @@ public static void ReplaceColor(this Image<Rgba32> image, Rgba32 sourceColor, Rg
         });
     }
 
+    /// <summary>
+    ///     将图片<paramref name="bitmap"/>上指定的一部分颜色替换为指定的对应颜色
+    /// </summary>
+    /// <param name="bitmap">图片</param>
+    /// <param name="colorInfos">存储替换信息的颜色组</param>
+    public static void ReplaceColor(this Image<Rgba32> bitmap, IReadOnlyList<(ColorMetadata SourceColor, ColorMetadata TargetColor)> colorInfos)
+    {
+        bitmap.PerPixelProcess(color =>
+        {
+            foreach (var colorInfo in colorInfos)
+            {
+                if (color.IsNearlyEquals(colorInfo.SourceColor))
+                {
+                    return colorInfo.TargetColor;
+                }
+            }
+
+            return color;
+        });
+    }
+
     /// <summary>
     ///     将图片<paramref name="bitmap"/>上指定的一部分颜色替换为指定的对应颜色
     /// </summary>

src/MediaConverters/MediaConverters.Tool/Contexts/ReplaceColorTask.cs

@@ -1,6 +1,7 @@
 using DotNetCampus.MediaConverters.Imaging.Effects;
 using DotNetCampus.MediaConverters.Imaging.Effects.Colors;
 using DotNetCampus.MediaConverters.Utils;
+
 using SixLabors.ImageSharp;
 using SixLabors.ImageSharp.PixelFormats;
 
@@ -12,18 +13,18 @@ public class ReplaceColorTask : IImageConvertTask
 
     public void Run(Image<Rgba32> image)
     {
-        if (ReplaceColorInfoList is null || ReplaceColorInfoList.Count ==0)
+        if (ReplaceColorInfoList is null || ReplaceColorInfoList.Count == 0)
         {
             return;
         }
 
-        var dictionary = new Dictionary<ColorMetadata, ColorMetadata>(ReplaceColorInfoList.Count);
+        var dictionary = new List<(ColorMetadata SourceColor, ColorMetadata TargetColor)>(ReplaceColorInfoList.Count);
         foreach (var replaceColorInfo in ReplaceColorInfoList)
         {
             var (oldColor, newColor) = replaceColorInfo.ToRgba32Pair();
             var oldMetadata = new ColorMetadata(oldColor);
             var newMetadata = new ColorMetadata(newColor);
-            dictionary[oldMetadata] = newMetadata;
+            dictionary.Add((oldMetadata, newMetadata));
         }
 
         image.ReplaceColor(dictionary);