Added rotation filter

scripts/filters/rotate.js

@@ -0,0 +1,42 @@
+function Filter_Rotate()
+{
+  Filter.call(this);
+  this.parameters = [Angle,Position];
+
+  this.render = function(cmd)
+  {
+    var position = cmd.position() ? cmd.position() : new Position(ronin.surface.size.width/2,ronin.surface.size.height/2);
+    var angle = cmd.angle() ? cmd.angle().degrees : 90;
+
+    ronin.overlay.clear();
+    this.draw(this.context(),angle,position);
+    ronin.overlay.clear();
+  }
+
+  this.preview = function(cmd)
+  {
+    if(cmd.position()){
+      ronin.overlay.clear();
+      ronin.overlay.draw_pointer(cmd.position());
+    }
+  }
+
+  this.draw = function(context = this.context(), angle, position)
+  {
+    var w = ronin.surface.size.width;
+    var h = ronin.surface.size.height;
+
+    ronin.overlay.context().drawImage(context.canvas,0,0,w,h);
+
+    ronin.surface.active_layer.clear();
+
+    context.save();
+    context.translate(position.x,position.y);
+    context.rotate(angle*Math.PI/180);
+
+    context.drawImage(ronin.overlay.context().canvas, -position.x, -position.y,w,h)
+
+    context.rotate(-angle*Math.PI/180);
+    context.restore();
+  }
+}

scripts/filters/stencil.js

@@ -1,6 +1,7 @@
 function Filter_Stencil()
 {
   Filter.call(this);
+  this.parameters = [Angle];
 
   this.render = function(cmd)
   {