Add BitmapUtils.cs and more

WelsonJS.Toolkit/WelsonJS.Toolkit/BitmapUtils.cs

@@ -0,0 +1,67 @@
+/*
+ * WelsonJS.Toolkit: WelsonJS native component
+ * 
+ *     filename:
+ *         BitmapUtils.cs
+ * 
+ *     description:
+ *         WelsonJS - Build a Windows app on the Windows built-in JavaScript engine
+ * 
+ *     website:
+ *         - https://github.com/gnh1201/welsonjs
+ *         - https://catswords.social/@catswords_oss
+ * 
+ *     author:
+ *         Namhyeon Go <abuse@catswords.net>
+ *
+ *     license:
+ *         GPLv3 or MS-RL(Microsoft Reciprocal License)
+ * 
+ */
+
+using System.Drawing;
+
+namespace WelsonJS
+{
+    public class BitmapUtils
+    {
+        private static Bitmap Load(string filename)
+        {
+            return new Bitmap(filename);
+        }
+
+        public static void Crop(string srcfile, string dstfile, int x, int y, int a, int b)
+        {
+            Bitmap originalBitmap = Load(srcfile);
+
+            Rectangle cropArea = new Rectangle(x, y, a, b);
+            Bitmap croppedBitmap = originalBitmap.Clone(cropArea, originalBitmap.PixelFormat);
+
+            croppedBitmap.Save(dstfile);
+        }
+
+        public static int[] GetSize(string srcfile)
+        {
+            Bitmap bitmap = Load(srcfile);
+
+            int width = bitmap.Width;
+            int height = bitmap.Height;
+
+            return new int[] { width, height };
+        }
+
+        public static int[] GetPixel(string srcfile, int x, int y)
+        {
+            Bitmap bitmap = Load(srcfile);
+
+            Color pixelColor = bitmap.GetPixel(x, y);
+            int red = pixelColor.R;
+            int green = pixelColor.G;
+            int blue = pixelColor.B;
+
+            bitmap.Dispose();
+
+            return new int[] { red, green, blue };
+        }
+    }
+}

WelsonJS.Toolkit/WelsonJS.Toolkit/Toolkit.cs

@@ -241,5 +241,32 @@ namespace WelsonJS
             HIGHT.ECB cipher = new HIGHT.ECB(userKey);
             return Encoding.UTF8.GetString(cipher.Decrypt(dataIn)).Trim('\0');
         }
+
+        [ComVisible(true)]
+        public string GetImageSize(string srcfile)
+        {
+            int[] result = BitmapUtils.GetSize(srcfile);
+            int width = result[0];
+            int height = result[1];
+
+            return $"width={width}; height={height}";
+        }
+
+        [ComVisible(true)]
+        public string GetImagePixel(string srcfile)
+        {
+            int[] result = BitmapUtils.GetSize(srcfile);
+            int red = result[0];
+            int green = result[1];
+            int blue = result[2];
+
+            return $"red={red}; green={green}; blue={blue}";
+        }
+
+        [ComVisible(true)]
+        public void CropImage(string srcfile, string dstfile, int x, int y, int a, int b)
+        {
+            BitmapUtils.Crop(srcfile, dstfile, x, y, a, b);
+        }
     }
 }

WelsonJS.Toolkit/WelsonJS.Toolkit/WelsonJS.Toolkit.csproj

@@ -65,6 +65,7 @@
     <Reference Include="System.Windows.Forms" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="BitmapUtils.cs" />
     <Compile Include="Compression\LZ77.cs" />
     <Compile Include="Cryptography\HIGHT.cs" />
     <Compile Include="NamedSharedMemory.cs" />