/* === S Y N F I G ========================================================= */
/*! \file lineargradient.h
** \brief Header file for implementation of the "Linear Gradient" layer
**
** $Id$
**
** \legal
** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
** Copyright (c) 2012-2013 Carlos López
**
** 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
**
** === N O T E S ===========================================================
**
** ========================================================================= */
/* === S T A R T =========================================================== */
#ifndef __SYNFIG_INTERPOLATION_LINEARGRADIENT_H
#define __SYNFIG_INTERPOLATION_LINEARGRADIENT_H
/* === H E A D E R S ======================================================= */
#include <synfig/vector.h>
#include <synfig/layers/layer_composite.h>
#include <synfig/gradient.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 ======================================= */
using namespace synfig;
using namespace std;
using namespace etl;
class LinearGradient : public Layer_Composite, public Layer_NoDeform
{
SYNFIG_LAYER_MODULE_EXT
private:
//! Parameter: (Point)
ValueBase param_p1,param_p2;
//! Parameter: (Gradient)
ValueBase param_gradient;
//! Parameter: (bool)
ValueBase param_loop;
//! Parameter: (bool)
ValueBase param_zigzag;
struct Params {
Point p1;
Point p2;
Point diff;
CompiledGradient gradient;
bool loop;
bool zigzag;
inline Params(): loop(false), zigzag(false) { }
void calc_diff();
};
void fill_params(Params ¶ms)const;
synfig::Color color_func(const Params ¶ms, const synfig::Point &x, synfig::Real supersample = 0.0)const;
synfig::Real calc_supersample(const Params ¶ms, synfig::Real pw, synfig::Real ph)const;
bool compile_gradient(cairo_pattern_t* pattern, Gradient gradient)const;
public:
LinearGradient();
virtual bool set_param(const String ¶m, const ValueBase &value);
virtual ValueBase get_param(const String ¶m)const;
virtual Color get_color(Context context, const Point &pos)const;
virtual bool accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const;
virtual bool accelerated_cairorender(Context context, cairo_t *cr, int quality, const RendDesc &renddesc, ProgressCallback *cb)const;
synfig::Layer::Handle hit_check(synfig::Context context, const synfig::Point &point)const;
virtual Vocab get_param_vocab()const;
};
/* === E N D =============================================================== */
#endif