1 /* === S I N F G =========================================================== */
2 /*! \file layer_solidcolor.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 Robert B. Quattlebaum Jr.
10 ** This software and associated documentation
11 ** are CONFIDENTIAL and PROPRIETARY property of
12 ** the above-mentioned copyright holder.
14 ** You may not copy, print, publish, or in any
15 ** other way distribute this software without
16 ** a prior written agreement with
17 ** the copyright holder.
20 /* ========================================================================= */
22 /* === H E A D E R S ======================================================= */
31 #include <sinfg/string.h>
32 #include <sinfg/time.h>
33 #include <sinfg/context.h>
34 #include <sinfg/paramdesc.h>
35 #include <sinfg/renddesc.h>
36 #include <sinfg/surface.h>
37 #include <sinfg/value.h>
38 #include <sinfg/valuenode.h>
40 #include "radialgradient.h"
44 /* === U S I N G =========================================================== */
48 using namespace sinfg;
50 /* === G L O B A L S ======================================================= */
52 SINFG_LAYER_INIT(RadialGradient);
53 SINFG_LAYER_SET_NAME(RadialGradient,"radial_gradient");
54 SINFG_LAYER_SET_LOCAL_NAME(RadialGradient,_("Radial Gradient"));
55 SINFG_LAYER_SET_CATEGORY(RadialGradient,_("Gradients"));
56 SINFG_LAYER_SET_VERSION(RadialGradient,"0.1");
57 SINFG_LAYER_SET_CVS_ID(RadialGradient,"$Id: radialgradient.cpp,v 1.1.1.1 2005/01/04 01:23:10 darco Exp $");
59 /* === P R O C E D U R E S ================================================= */
61 /* === M E T H O D S ======================================================= */
63 /* === E N T R Y P O I N T ================================================= */
65 RadialGradient::RadialGradient():
66 Layer_Composite(1.0,Color::BLEND_STRAIGHT),
67 gradient(Color::black(),Color::white()),
76 RadialGradient::set_param(const String & param, const ValueBase &value)
84 return Layer_Composite::set_param(param,value);
88 RadialGradient::get_param(const String ¶m)const
99 return Layer_Composite::get_param(param);
103 RadialGradient::get_param_vocab()const
105 Layer::Vocab ret(Layer_Composite::get_param_vocab());
107 ret.push_back(ParamDesc("gradient")
108 .set_local_name(_("Gradient"))
111 ret.push_back(ParamDesc("center")
112 .set_local_name(_("Center"))
115 ret.push_back(ParamDesc("radius")
116 .set_local_name(_("Radius"))
117 .set_description(_("This is the radius of the circle"))
118 .set_origin("center")
121 ret.push_back(ParamDesc("loop")
122 .set_local_name(_("Loop"))
125 ret.push_back(ParamDesc("zigzag")
126 .set_local_name(_("Zig-Zag"))
133 RadialGradient::color_func(const Point &point, float supersample)const
135 Real dist((point-center).mag()/radius);
141 if(dist>1)dist=2.0-dist;
148 if(dist+supersample*0.5>1.0)
150 Color pool(gradient(dist,supersample*0.5)*(1.0-(dist-supersample*0.5)));
151 pool+=gradient((dist+supersample*0.5)-1.0,supersample*0.5)*((dist+supersample*0.5)-1.0);
152 if(pool.get_a() && pool.is_valid())
154 pool.set_r(pool.get_r()/pool.get_a());
155 pool.set_g(pool.get_g()/pool.get_a());
156 pool.set_b(pool.get_b()/pool.get_a());
157 pool.set_a(pool.get_a()/supersample);
161 if(dist-supersample*0.5<0.0)
163 Color pool(gradient(dist,supersample*0.5)*(dist+supersample*0.5));
164 pool+=gradient(1.0-(dist-supersample*0.5),supersample*0.5)*(-(dist-supersample*0.5));
165 if(pool.get_a() && pool.is_valid())
167 pool.set_r(pool.get_r()/pool.get_a());
168 pool.set_g(pool.get_g()/pool.get_a());
169 pool.set_b(pool.get_b()/pool.get_a());
170 pool.set_a(pool.get_a()/supersample);
176 return gradient(dist,supersample);
181 RadialGradient::calc_supersample(const sinfg::Point &x, float pw,float ph)const
183 // return sqrt(pw*pw+ph*ph)/radius;
184 return 1.2*pw/radius;
188 RadialGradient::hit_check(sinfg::Context context, const sinfg::Point &point)const
190 if(get_blend_method()==Color::BLEND_STRAIGHT && get_amount()>=0.5)
191 return const_cast<RadialGradient*>(this);
192 if(get_amount()==0.0)
193 return context.hit_check(point);
194 if((get_blend_method()==Color::BLEND_STRAIGHT || get_blend_method()==Color::BLEND_COMPOSITE) && color_func(point).get_a()>0.5)
195 return const_cast<RadialGradient*>(this);
196 return context.hit_check(point);
200 RadialGradient::get_color(Context context, const Point &pos)const
202 const Color color(color_func(pos));
204 if(get_amount()==1.0 && get_blend_method()==Color::BLEND_STRAIGHT)
207 return Color::blend(color,context.get_color(pos),get_amount(),get_blend_method());
211 RadialGradient::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
213 SuperCallback supercb(cb,0,9500,10000);
215 if(get_amount()==1.0 && get_blend_method()==Color::BLEND_STRAIGHT)
217 surface->set_wh(renddesc.get_w(),renddesc.get_h());
221 if(!context.accelerated_render(surface,quality,renddesc,&supercb))
230 Surface::pen pen(surface->begin());
231 const Real pw(renddesc.get_pw()),ph(renddesc.get_ph());
233 Point tl(renddesc.get_tl());
234 const int w(surface->get_w());
235 const int h(surface->get_h());
237 if(get_amount()==1.0 && get_blend_method()==Color::BLEND_STRAIGHT)
239 for(y=0,pos[1]=tl[1];y<h;y++,pen.inc_y(),pen.dec_x(x),pos[1]+=ph)
240 for(x=0,pos[0]=tl[0];x<w;x++,pen.inc_x(),pos[0]+=pw)
241 pen.put_value(color_func(pos,calc_supersample(pos,pw,ph)));
245 for(y=0,pos[1]=tl[1];y<h;y++,pen.inc_y(),pen.dec_x(x),pos[1]+=ph)
246 for(x=0,pos[0]=tl[0];x<w;x++,pen.inc_x(),pos[0]+=pw)
247 pen.put_value(Color::blend(color_func(pos,calc_supersample(pos,pw,ph)),pen.get_value(),get_amount(),get_blend_method()));
250 // Mark our progress as finished
251 if(cb && !cb->amount_complete(10000,10000))