1 /* === S Y N F I G ========================================================= */
2 /*! \file layer_composite.h
3 ** \brief Composite Layer Class Implementation
5 ** $Id: layer_composite.h,v 1.2 2005/01/24 03:08:18 darco Exp $
8 ** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
10 ** This package is free software; you can redistribute it and/or
11 ** modify it under the terms of the GNU General Public License as
12 ** published by the Free Software Foundation; either version 2 of
13 ** the License, or (at your option) any later version.
15 ** This package is distributed in the hope that it will be useful,
16 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 ** General Public License for more details.
21 /* ========================================================================= */
23 /* === S T A R T =========================================================== */
25 #ifndef __SYNFIG_LAYER_COMPOSITE_H
26 #define __SYNFIG_LAYER_COMPOSITE_H
28 /* === H E A D E R S ======================================================= */
33 /* === M A C R O S ========================================================= */
35 /* === T Y P E D E F S ===================================================== */
37 /* === C L A S S E S & S T R U C T S ======================================= */
41 class Layer_NoDeform {};
44 /*! \class Layer_Composite
45 ** \brief Base class for layers that put stuff ontop of lower layers
47 class Layer_Composite : public Layer
53 Color::BlendMethod blend_method_;
59 Color::BlendMethod blend_method=Color::BLEND_COMPOSITE
62 blend_method_ (blend_method)
67 float get_amount()const { return amount_; }
69 Layer_Composite& set_amount(float x) { amount_=x; return *this; }
71 Color::BlendMethod get_blend_method()const { return blend_method_; }
73 Layer_Composite& set_blend_method(Color::BlendMethod x) { blend_method_=x; return *this; }
75 bool is_solid_color()const { return amount_==1.0f && blend_method_==Color::BLEND_STRAIGHT; }
77 bool is_disabled()const { return amount_==0.0f; }
79 virtual Vocab get_param_vocab()const;
81 virtual bool set_param(const String ¶m, const ValueBase &value);
83 virtual ValueBase get_param(const String ¶m)const;
85 virtual Rect get_full_bounding_rect(Context context)const;
87 virtual bool accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const;
88 }; // END of class Layer_Composite
90 }; // END of namespace synfig
92 /* === E N D =============================================================== */