Start writing optimized DebugLayer

projects/kiss-flixel/src/kiss_flixel/DebugLayer.hx

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+package kiss_flixel;
+
+import kiss.Prelude;
+import kiss.List;
+import flixel.FlxSprite;
+import flixel.group.FlxGroup;
+import flixel.util.FlxSpriteUtil;
+import flixel.util.FlxColor;
+using flixel.util.FlxSpriteUtil;
+using kiss_flixel.DebugLayer;
+
+@:build(kiss.Kiss.build())
+class DebugLayer extends FlxTypedGroup<FlxSprite> {
+    public function drawRect(X:Float, Y:Float, Width:Float, Height:Float, FillColor:FlxColor = FlxColor.WHITE, ?lineStyle:Null<LineStyle>, ?drawStyle:Null<DrawStyle>):FlxSprite {
+        var thickness = 1.0;
+        if (lineStyle != null) {
+            thickness = lineStyle.thickness;
+        }
+        
+        var s = new FlxSprite(X-thickness/2, Y-thickness/2);
+
+        // TODO test where thickness appears - is it center-out from the given border?
+        s.mg(Width + thickness, Height + thickness);
+        s.drawRect(thickness/2, thickness/2, Width, Height, FillColor, lineStyle, drawStyle);
+        add(s);
+        return s;
+    }
+
+    public static function mg(s:FlxSprite, Width:Float, Height:Float):FlxSprite {
+        return s.makeGraphic(Math.ceil(Width), Math.ceil(Height), FlxColor.TRANSPARENT, true);
+    }
+}

projects/kiss-flixel/src/kiss_flixel/DebugLayer.kiss

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+(defNew []
+    (super))