1 /* === S I N F G =========================================================== */
2 /*! \file conicalgradient.cpp
3 ** \brief Template Header
5 ** $Id: conicalgradient.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>
39 #include <sinfg/angle.h>
41 #include "conicalgradient.h"
45 /* === U S I N G =========================================================== */
49 using namespace sinfg;
51 /* === G L O B A L S ======================================================= */
53 SINFG_LAYER_INIT(ConicalGradient);
54 SINFG_LAYER_SET_NAME(ConicalGradient,"conical_gradient");
55 SINFG_LAYER_SET_LOCAL_NAME(ConicalGradient,_("Conical Gradient"));
56 SINFG_LAYER_SET_CATEGORY(ConicalGradient,_("Gradients"));
57 SINFG_LAYER_SET_VERSION(ConicalGradient,"0.1");
58 SINFG_LAYER_SET_CVS_ID(ConicalGradient,"$Id: conicalgradient.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 ConicalGradient::ConicalGradient():
67 Layer_Composite(1.0,Color::BLEND_STRAIGHT),
68 gradient(Color::black(),Color::white()),
76 ConicalGradient::set_param(const String & param, const ValueBase &value)
82 return Layer_Composite::set_param(param,value);
86 ConicalGradient::get_param(const String ¶m)const
96 return Layer_Composite::get_param(param);
100 ConicalGradient::get_param_vocab()const
102 Layer::Vocab ret(Layer_Composite::get_param_vocab());
104 ret.push_back(ParamDesc("gradient")
105 .set_local_name(_("Gradient"))
108 ret.push_back(ParamDesc("center")
109 .set_local_name(_("Center"))
112 ret.push_back(ParamDesc("angle")
113 .set_local_name(_("Angle"))
114 .set_origin("center")
117 ret.push_back(ParamDesc("symmetric")
118 .set_local_name(_("Symmetric"))
125 ConicalGradient::color_func(const Point &pos, float supersample)const
127 const Point centered(pos-center);
128 Angle::rot a=Angle::tan(-centered[1],centered[0]).mod();
130 Real dist(a.mod().get());
138 if(dist>1)dist=2.0-dist;
140 /* if(dist+supersample*0.5>1.0)
142 Color pool(gradient(dist,supersample*0.5)*(1.0-(dist-supersample*0.5)));
143 pool+=gradient((dist+supersample*0.5)-1.0,supersample*0.5)*((dist+supersample*0.5)-1.0);
144 if(pool.get_a() && pool.is_valid())
146 pool.set_r(pool.get_r()/pool.get_a());
147 pool.set_g(pool.get_g()/pool.get_a());
148 pool.set_b(pool.get_b()/pool.get_a());
149 pool.set_a(pool.get_a()/supersample);
154 if(dist-supersample*0.5<0.0)
156 Color pool(gradient(dist,supersample*0.5)*(dist+supersample*0.5));
157 pool+=gradient(1.0-(dist-supersample*0.5),supersample*0.5)*(-(dist-supersample*0.5));
158 if(pool.get_a() && pool.is_valid())
160 pool.set_r(pool.get_r()/pool.get_a());
161 pool.set_g(pool.get_g()/pool.get_a());
162 pool.set_b(pool.get_b()/pool.get_a());
163 pool.set_a(pool.get_a()/supersample);
168 if(dist+supersample*0.5>1.0)
170 Color pool(gradient(dist,supersample*0.5).premult_alpha()*(1.0-(dist-supersample*0.5)));
171 pool+=gradient((dist+supersample*0.5)-1.0,supersample*0.5).premult_alpha()*((dist+supersample*0.5)-1.0);
172 return pool.demult_alpha();
174 if(dist-supersample*0.5<0.0)
176 Color pool(gradient(dist,supersample*0.5).premult_alpha()*(dist+supersample*0.5));
177 pool+=gradient(1.0-(dist-supersample*0.5),supersample*0.5).premult_alpha()*(-(dist-supersample*0.5));
178 return pool.demult_alpha();
181 return gradient(dist,supersample);
185 ConicalGradient::calc_supersample(const sinfg::Point &x, float pw,float ph)const
188 if(abs(adj[0])<abs(pw*0.5) && abs(adj[1])<abs(ph*0.5))
190 return (pw/Point(x-center).mag())/(PI*2);
194 ConicalGradient::hit_check(sinfg::Context context, const sinfg::Point &point)const
196 if(get_blend_method()==Color::BLEND_STRAIGHT && get_amount()>=0.5)
197 return const_cast<ConicalGradient*>(this);
198 if(get_amount()==0.0)
199 return context.hit_check(point);
200 if((get_blend_method()==Color::BLEND_STRAIGHT || get_blend_method()==Color::BLEND_COMPOSITE) && color_func(point).get_a()>0.5)
201 return const_cast<ConicalGradient*>(this);
202 return context.hit_check(point);
206 ConicalGradient::get_color(Context context, const Point &pos)const
208 const Color color(color_func(pos));
210 if(get_amount()==1.0 && get_blend_method()==Color::BLEND_STRAIGHT)
213 return Color::blend(color,context.get_color(pos),get_amount(),get_blend_method());
217 ConicalGradient::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
219 SuperCallback supercb(cb,0,9500,10000);
221 if(get_amount()==1.0 && get_blend_method()==Color::BLEND_STRAIGHT)
223 surface->set_wh(renddesc.get_w(),renddesc.get_h());
227 if(!context.accelerated_render(surface,quality,renddesc,&supercb))
236 Surface::pen pen(surface->begin());
237 const Real pw(renddesc.get_pw()),ph(renddesc.get_ph());
239 Point tl(renddesc.get_tl());
240 const int w(surface->get_w());
241 const int h(surface->get_h());
243 if(get_amount()==1.0 && get_blend_method()==Color::BLEND_STRAIGHT)
247 for(y=0,pos[1]=tl[1];y<h;y++,pen.inc_y(),pen.dec_x(x),pos[1]+=ph)
248 for(x=0,pos[0]=tl[0];x<w;x++,pen.inc_x(),pos[0]+=pw)
249 pen.put_value(color_func(pos,calc_supersample(pos,pw,ph)));
253 for(y=0,pos[1]=tl[1];y<h;y++,pen.inc_y(),pen.dec_x(x),pos[1]+=ph)
254 for(x=0,pos[0]=tl[0];x<w;x++,pen.inc_x(),pos[0]+=pw)
255 pen.put_value(color_func(pos,0));
262 for(y=0,pos[1]=tl[1];y<h;y++,pen.inc_y(),pen.dec_x(x),pos[1]+=ph)
263 for(x=0,pos[0]=tl[0];x<w;x++,pen.inc_x(),pos[0]+=pw)
264 pen.put_value(Color::blend(color_func(pos,calc_supersample(pos,pw,ph)),pen.get_value(),get_amount(),get_blend_method()));
268 for(y=0,pos[1]=tl[1];y<h;y++,pen.inc_y(),pen.dec_x(x),pos[1]+=ph)
269 for(x=0,pos[0]=tl[0];x<w;x++,pen.inc_x(),pos[0]+=pw)
270 pen.put_value(Color::blend(color_func(pos,0),pen.get_value(),get_amount(),get_blend_method()));
274 // Mark our progress as finished
275 if(cb && !cb->amount_complete(10000,10000))