1 /* === S Y N F I G ========================================================= */
2 /*! \file lyr_std/radialgradient.cpp
3 ** \brief Template Header
5 ** $Id: radialgradient.cpp,v 1.1.1.1 2005/01/04 01:23:10 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 /* === H E A D E R S ======================================================= */
32 #include <synfig/string.h>
33 #include <synfig/time.h>
34 #include <synfig/context.h>
35 #include <synfig/paramdesc.h>
36 #include <synfig/renddesc.h>
37 #include <synfig/surface.h>
38 #include <synfig/value.h>
39 #include <synfig/valuenode.h>
41 #include "radialgradient.h"
45 /* === U S I N G =========================================================== */
49 using namespace synfig;
51 /* === G L O B A L S ======================================================= */
53 SYNFIG_LAYER_INIT(RadialGradient);
54 SYNFIG_LAYER_SET_NAME(RadialGradient,"radial_gradient");
55 SYNFIG_LAYER_SET_LOCAL_NAME(RadialGradient,_("Radial Gradient"));
56 SYNFIG_LAYER_SET_CATEGORY(RadialGradient,_("Gradients"));
57 SYNFIG_LAYER_SET_VERSION(RadialGradient,"0.1");
58 SYNFIG_LAYER_SET_CVS_ID(RadialGradient,"$Id: radialgradient.cpp,v 1.1.1.1 2005/01/04 01:23:10 darco Exp $");
60 /* === P R O C E D U R E S ================================================= */
62 /* === M E T H O D S ======================================================= */
64 /* === E N T R Y P O I N T ================================================= */
66 RadialGradient::RadialGradient():
67 Layer_Composite(1.0,Color::BLEND_STRAIGHT),
68 gradient(Color::black(),Color::white()),
77 RadialGradient::set_param(const String & param, const ValueBase &value)
85 return Layer_Composite::set_param(param,value);
89 RadialGradient::get_param(const String ¶m)const
100 return Layer_Composite::get_param(param);
104 RadialGradient::get_param_vocab()const
106 Layer::Vocab ret(Layer_Composite::get_param_vocab());
108 ret.push_back(ParamDesc("gradient")
109 .set_local_name(_("Gradient"))
112 ret.push_back(ParamDesc("center")
113 .set_local_name(_("Center"))
116 ret.push_back(ParamDesc("radius")
117 .set_local_name(_("Radius"))
118 .set_description(_("This is the radius of the circle"))
119 .set_origin("center")
122 ret.push_back(ParamDesc("loop")
123 .set_local_name(_("Loop"))
126 ret.push_back(ParamDesc("zigzag")
127 .set_local_name(_("Zig-Zag"))
134 RadialGradient::color_func(const Point &point, float supersample)const
136 Real dist((point-center).mag()/radius);
142 if(dist>1)dist=2.0-dist;
149 if(dist+supersample*0.5>1.0)
151 Color pool(gradient(dist,supersample*0.5)*(1.0-(dist-supersample*0.5)));
152 pool+=gradient((dist+supersample*0.5)-1.0,supersample*0.5)*((dist+supersample*0.5)-1.0);
153 if(pool.get_a() && pool.is_valid())
155 pool.set_r(pool.get_r()/pool.get_a());
156 pool.set_g(pool.get_g()/pool.get_a());
157 pool.set_b(pool.get_b()/pool.get_a());
158 pool.set_a(pool.get_a()/supersample);
162 if(dist-supersample*0.5<0.0)
164 Color pool(gradient(dist,supersample*0.5)*(dist+supersample*0.5));
165 pool+=gradient(1.0-(dist-supersample*0.5),supersample*0.5)*(-(dist-supersample*0.5));
166 if(pool.get_a() && pool.is_valid())
168 pool.set_r(pool.get_r()/pool.get_a());
169 pool.set_g(pool.get_g()/pool.get_a());
170 pool.set_b(pool.get_b()/pool.get_a());
171 pool.set_a(pool.get_a()/supersample);
177 return gradient(dist,supersample);
182 RadialGradient::calc_supersample(const synfig::Point &x, float pw,float ph)const
184 // return sqrt(pw*pw+ph*ph)/radius;
185 return 1.2*pw/radius;
188 synfig::Layer::Handle
189 RadialGradient::hit_check(synfig::Context context, const synfig::Point &point)const
191 if(get_blend_method()==Color::BLEND_STRAIGHT && get_amount()>=0.5)
192 return const_cast<RadialGradient*>(this);
193 if(get_amount()==0.0)
194 return context.hit_check(point);
195 if((get_blend_method()==Color::BLEND_STRAIGHT || get_blend_method()==Color::BLEND_COMPOSITE) && color_func(point).get_a()>0.5)
196 return const_cast<RadialGradient*>(this);
197 return context.hit_check(point);
201 RadialGradient::get_color(Context context, const Point &pos)const
203 const Color color(color_func(pos));
205 if(get_amount()==1.0 && get_blend_method()==Color::BLEND_STRAIGHT)
208 return Color::blend(color,context.get_color(pos),get_amount(),get_blend_method());
212 RadialGradient::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
214 SuperCallback supercb(cb,0,9500,10000);
216 if(get_amount()==1.0 && get_blend_method()==Color::BLEND_STRAIGHT)
218 surface->set_wh(renddesc.get_w(),renddesc.get_h());
222 if(!context.accelerated_render(surface,quality,renddesc,&supercb))
231 Surface::pen pen(surface->begin());
232 const Real pw(renddesc.get_pw()),ph(renddesc.get_ph());
234 Point tl(renddesc.get_tl());
235 const int w(surface->get_w());
236 const int h(surface->get_h());
238 if(get_amount()==1.0 && get_blend_method()==Color::BLEND_STRAIGHT)
240 for(y=0,pos[1]=tl[1];y<h;y++,pen.inc_y(),pen.dec_x(x),pos[1]+=ph)
241 for(x=0,pos[0]=tl[0];x<w;x++,pen.inc_x(),pos[0]+=pw)
242 pen.put_value(color_func(pos,calc_supersample(pos,pw,ph)));
246 for(y=0,pos[1]=tl[1];y<h;y++,pen.inc_y(),pen.dec_x(x),pos[1]+=ph)
247 for(x=0,pos[0]=tl[0];x<w;x++,pen.inc_x(),pos[0]+=pw)
248 pen.put_value(Color::blend(color_func(pos,calc_supersample(pos,pw,ph)),pen.get_value(),get_amount(),get_blend_method()));
251 // Mark our progress as finished
252 if(cb && !cb->amount_complete(10000,10000))