it is done

core/src/mindustry/ui/BorderImage.java

@@ -0,0 +1,49 @@
+package mindustry.ui;
+
+import arc.graphics.*;
+import arc.graphics.g2d.*;
+import arc.scene.ui.Image;
+import arc.scene.ui.layout.Scl;
+import mindustry.graphics.Pal;
+
+public class BorderImage extends Image{
+    public float thickness = 4f;
+    public Color borderColor = Pal.gray;
+
+    public BorderImage(){
+
+    }
+
+    public BorderImage(Texture texture){
+        super(texture);
+    }
+
+    public BorderImage(Texture texture, float thick){
+        super(texture);
+        thickness = thick;
+    }
+
+    public BorderImage(TextureRegion region, float thick){
+        super(region);
+        thickness = thick;
+    }
+
+    public BorderImage border(Color color){
+        this.borderColor = color;
+        return this;
+    }
+
+    @Override
+    public void draw(){
+        super.draw();
+
+        float scaleX = getScaleX();
+        float scaleY = getScaleY();
+
+        Draw.color(borderColor);
+        Draw.alpha(parentAlpha);
+        Lines.stroke(Scl.scl(thickness));
+        Lines.rect(x + imageX, y + imageY, imageWidth * scaleX, imageHeight * scaleY);
+        Draw.reset();
+    }
+}