1 /* === S Y N F I G ========================================================= */
3 ** \brief Iterator for the layers behind the current Layer.
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_CONTEXT_H
26 #define __SYNFIG_CONTEXT_H
28 /* === H E A D E R S ======================================================= */
30 #include "canvasbase.h"
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 ======================================= */
46 class ProgressCallback;
52 ** \brief Context is a class to warp the iterator for a double queue of layers
53 * (that is the CanvasBase).
54 ** \see Layer, Canvas, CanvasBase */
55 class Context : public CanvasBase::const_iterator
60 //! Constructor based on other CanvasBase iterator
61 Context(const CanvasBase::const_iterator &x):CanvasBase::const_iterator(x) { }
63 //!Assignation operator
64 Context operator=(const CanvasBase::const_iterator &x)
65 { return CanvasBase::const_iterator::operator=(x); }
67 //! Returns the color of the context at the Point \pos.
68 //! It is the blended color of the context
69 Color get_color(const Point &pos)const;
71 //! With a given \quality and a given render description it puts the context
72 //! blend result into the painting \surface */
73 bool accelerated_render(Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb) const;
75 //! Sets the context to the Time \time. It is done recursively.
76 void set_time(Time time)const;
78 //! Sets the context to the Time \time. It is done recursively. Vector \pos is not used
79 void set_time(Time time,const Vector &pos)const;
81 //! Returns the bounding rectangle of all the context.
82 //! It is the union of all the layers's bounding rectangle.
83 Rect get_full_bounding_rect()const;
85 //! Returns the first context's layer's handle that intesects the given \point */
86 etl::handle<Layer> hit_check(const Point &point)const;
88 }; // END of class Context
90 }; // END of namespace synfig
92 /* === E N D =============================================================== */