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[synfig.git] / synfig-core / trunk / src / synfig / layer_composite.h

diff --git a/synfig-core/trunk/src/synfig/layer_composite.h b/synfig-core/trunk/src/synfig/layer_composite.h
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+/* === S I N F G =========================================================== */
+/*!    \file layer_composite.h
+**     \brief Composite Layer Class Implementation
+**
+**     $Id: layer_composite.h,v 1.2 2005/01/24 03:08:18 darco Exp $
+**
+**     \legal
+**     Copyright (c) 2002 Robert B. Quattlebaum Jr.
+**
+**     This software and associated documentation
+**     are CONFIDENTIAL and PROPRIETARY property of
+**     the above-mentioned copyright holder.
+**
+**     You may not copy, print, publish, or in any
+**     other way distribute this software without
+**     a prior written agreement with
+**     the copyright holder.
+**     \endlegal
+*/
+/* ========================================================================= */
+
+/* === S T A R T =========================================================== */
+
+#ifndef __SINFG_LAYER_COMPOSITE_H
+#define __SINFG_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 sinfg {
+
+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; }
+
+       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 &param, const ValueBase &value);
+
+       virtual ValueBase get_param(const String &param)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 sinfg
+
+/* === E N D =============================================================== */
+
+#endif