+/* === S Y N F I G ========================================================= */
+/*! \file layer_composite.h
+** \brief Composite Layer Class Implementation
+**
+** $Id$
+**
+** \legal
+** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
+** Copyright (c) 2007 Chris Moore
+**
+** This package is free software; you can redistribute it and/or
+** modify it under the terms of the GNU General Public License as
+** published by the Free Software Foundation; either version 2 of
+** the License, or (at your option) any later version.
+**
+** This package is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+** General Public License for more details.
+** \endlegal
+*/
+/* ========================================================================= */
+
+/* === S T A R T =========================================================== */
+
+#ifndef __SYNFIG_LAYER_COMPOSITE_H
+#define __SYNFIG_LAYER_COMPOSITE_H
+
+/* === H E A D E R S ======================================================= */
+
+#include "layer.h"
+#include "color.h"
+
+/* === M A C R O S ========================================================= */
+
+/* === T Y P E D E F S ===================================================== */
+
+/* === C L A S S E S & S T R U C T S ======================================= */
+
+namespace synfig {
+
+class Layer_NoDeform {};
+
+
+/*! \class Layer_Composite
+** \brief Base class for layers that put stuff ontop of lower layers
+*/
+class Layer_Composite : public Layer
+{
+private:
+
+ float amount_;
+
+ Color::BlendMethod blend_method_;
+
+protected:
+
+ Layer_Composite(
+ float amount=1.0,
+ Color::BlendMethod blend_method=Color::BLEND_COMPOSITE
+ ):
+ amount_ (amount),
+ blend_method_ (blend_method)
+ { }
+
+public:
+
+ float get_amount()const { return amount_; }
+
+ Layer_Composite& set_amount(float x) { amount_=x; return *this; }
+
+ Color::BlendMethod get_blend_method()const { return blend_method_; }
+
+ Layer_Composite& set_blend_method(Color::BlendMethod x) { blend_method_=x; return *this; }
+
+ virtual bool is_solid_color()const { return amount_==1.0f && blend_method_==Color::BLEND_STRAIGHT; }
+
+ bool is_disabled()const { return amount_==0.0f; }
+
+ virtual Vocab get_param_vocab()const;
+
+ virtual bool set_param(const String ¶m, const ValueBase &value);
+
+ virtual ValueBase get_param(const String ¶m)const;
+
+ virtual Rect get_full_bounding_rect(Context context)const;
+
+ virtual bool accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const;
+}; // END of class Layer_Composite
+
+}; // END of namespace synfig
+
+/* === E N D =============================================================== */
+
+#endif