Flambe - 9-slice example drawing http://projects.stroep.nl/flambe-9slice/

MainTest.hx

package urgame;

import flambe.animation.Sine;
import flambe.asset.Manifest;
import flambe.Entity;
import flambe.System;

class MainTest {
    private static function main () {
      System.init();
		
      System.loadAssetPack(Manifest.fromAssets("bootstrap")).get(function(bootstrapPack) {
          var image = new NineSlice(bootstrapPack.getTexture("image"), 4);
          image.scale.behavior = new Sine(1, 3, 5); // fancy sine here
          System.root.addChild(new Entity()
              .add(image));
      });
    }
}

NineSlice.hx

package urgame;
import flambe.animation.AnimatedFloat;
import flambe.display.Graphics;
import flambe.display.ImageSprite;
import flambe.display.SubTexture;
import flambe.display.Texture;

/**
 * @author Mark Knol
 */
class NineSlice extends ImageSprite {
  public var scale:AnimatedFloat;
  var _subTextures:Array<SubTexture>;

  public function new(texture:Texture, scaling:Float = 1) {
    super(texture);
    scale = new AnimatedFloat(scaling); 
    _subTextures = [for (y in 0...3) {
       for (x in 0...3) {
         trace(texture.width / 3 * x, texture.width / 3 * y);
        texture.subTexture(
          Std.int(texture.width / 3 * x), 
          Std.int(texture.height / 3 * y), 
          Std.int(texture.width / 3), 
          Std.int(texture.height / 3));
       }
    }];
  }
  
  override public function draw(g:Graphics) {
    //super.draw(g); // don't
    
    var scale:Float = scale._;
    var scaleBack:Float = 1 / scale;
    var dontScale:Float = 1;
    
    var x0 =  0;
    var x1 =  _subTextures[0].width / scale;
    var x2 =  x1 * scale + _subTextures[1].width * scale;
    
    var y0 =  0;
    var y1 =  _subTextures[0].height / scale;
    var y2 =  y1 * scale + _subTextures[1].height * scale;
   
    // save state
    g.save();
    
    // draw textures
    g.drawTexture(_subTextures[0], x0, y0);
    g.scale(scale, dontScale); 
    g.drawTexture(_subTextures[1], x1, y0);
    g.scale(scaleBack, dontScale);
    g.drawTexture(_subTextures[2], x2, y0);
    g.scale(dontScale, scale);
    g.drawTexture(_subTextures[3], x0, y1);
    g.scale(scale, dontScale);
    g.drawTexture(_subTextures[4], x1, y1);
    g.scale(scaleBack, dontScale);
    g.drawTexture(_subTextures[5], x2, y1);
    g.scale(dontScale, scaleBack);
    g.drawTexture(_subTextures[6], x0, y2);
    g.scale(scale, dontScale);
    g.drawTexture(_subTextures[7], x1, y2);
    g.scale(scaleBack, dontScale);
    g.drawTexture(_subTextures[8], x2, y2);
    
    // restore state for further drawing
    g.restore();
  }
  
  override public function onUpdate(dt:Float) {
    super.onUpdate(dt);
    scale.update(dt);
  }
}