cleanup

WebApp/Coordinate.cs

@@ -11,20 +11,7 @@ internal record Coordinate
     public Coordinate(string name)
     {
         Name = name;
-        int row = 0;
-        int col = 0;
-        foreach (var item in name)
-        {
-            if (item >= 'A')
-            {
-                row = row * 26 + (item - 'A' + 1);
-            }
-            else if (item >= '0')
-            {
-                col = col * 10 + (item - '0');
-            }
-        }
-
+        (int row, int col) = Helper.ToRowCol(name);
         Row = row;
         Col = col;
     }

WebApp/Helper.cs

@@ -14,4 +14,23 @@ public static class Helper
         }
         return result;
     }
+
+    public static (int Row, int Col) ToRowCol(string letters)
+    {
+        int row = 0;
+        int col = 0;
+        foreach (var item in letters)
+        {
+            if (item >= 'A')
+            {
+                row = row * 26 + (item - 'A' + 1);
+            }
+            else if (item >= '0')
+            {
+                col = col * 10 + (item - '0');
+            }
+        }
+
+        return (row, col);
+    }
 }

WebApp/ImageGenerator.cs

@@ -4,7 +4,7 @@ namespace WebApp;
 
 public class ImageGenerator
 {
-    public byte[] GenerateImage3(RequestBody requestBody)
+    public byte[] GenerateImage(RequestBody requestBody)
     {
         string[] inputs = requestBody.CanvasRect.Split(":");
         double scale = requestBody.OutputScale;
@@ -42,7 +42,12 @@ public class ImageGenerator
                     mat = mat.Resize(new Size(width, height));
                 }
 
-                Rect origin = new Rect((item.Col - 1) * a1Mat.Cols, (item.Row - 1) * a1Mat.Rows, a1Mat.Cols, a1Mat.Rows);
+                Rect origin = new Rect(
+                    (item.Col - 1) * a1Mat.Cols, 
+                    (item.Row - 1) * a1Mat.Rows,
+                    a1Mat.Cols, 
+                    a1Mat.Rows);
+                
                 var offset = origin.Location;
                 var roi = origin.Intersect(globalRoI);
                 if (roi.Width == 0 || roi.Height == 0) return;

WebApp/Program.cs

@@ -35,7 +35,7 @@ app.MapPost("/api/image/generate",
     ( RequestBody requestBody ) =>
 {
     ImageGenerator imageGenerator = new ImageGenerator();
-    var png = imageGenerator.GenerateImage3( requestBody );
+    var png = imageGenerator.GenerateImage( requestBody );
     return Results.File(png, "image/png", "result.png");
 })
     .WithName("ImageGenerator")