1 /* === S I N F G =========================================================== */
2 /*! \file spiralgradient.cpp
3 ** \brief Template Header
5 ** $Id: spiralgradient.cpp,v 1.1.1.1 2005/01/04 01:23:11 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 "spiralgradient.h"
44 /* === U S I N G =========================================================== */
48 using namespace sinfg;
50 /* === G L O B A L S ======================================================= */
52 SINFG_LAYER_INIT(SpiralGradient);
53 SINFG_LAYER_SET_NAME(SpiralGradient,"spiral_gradient");
54 SINFG_LAYER_SET_LOCAL_NAME(SpiralGradient,_("Spiral Gradient"));
55 SINFG_LAYER_SET_CATEGORY(SpiralGradient,_("Gradients"));
56 SINFG_LAYER_SET_VERSION(SpiralGradient,"0.1");
57 SINFG_LAYER_SET_CVS_ID(SpiralGradient,"$Id: spiralgradient.cpp,v 1.1.1.1 2005/01/04 01:23:11 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 SpiralGradient::SpiralGradient():
66 Layer_Composite(1.0,Color::BLEND_STRAIGHT),
67 gradient(Color::black(),Color::white()),
76 SpiralGradient::set_param(const String & param, const ValueBase &value)
84 return Layer_Composite::set_param(param,value);
88 SpiralGradient::get_param(const String ¶m)const
99 return Layer_Composite::get_param(param);
103 SpiralGradient::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"))
119 .set_origin("center")
122 ret.push_back(ParamDesc("angle")
123 .set_local_name(_("Angle"))
124 .set_origin("center")
127 ret.push_back(ParamDesc("clockwise")
128 .set_local_name(_("Clockwise"))
135 SpiralGradient::color_func(const Point &pos, float supersample)const
137 const Point centered(pos-center);
139 a=Angle::tan(-centered[1],centered[0]).mod();
142 if(supersample<0.00001)supersample=0.00001;
144 Real dist((pos-center).mag()/radius);
146 dist+=Angle::rot(a.mod()).get();
148 dist-=Angle::rot(a.mod()).get();
151 if(dist+supersample*0.5>1.0)
153 Color pool(gradient(dist,supersample*0.5).premult_alpha()*(1.0-(dist-supersample*0.5)));
154 pool+=gradient((dist+supersample*0.5)-1.0,supersample*0.5).premult_alpha()*((dist+supersample*0.5)-1.0);
155 return pool.demult_alpha();
157 if(dist-supersample*0.5<0.0)
159 Color pool(gradient(dist,supersample*0.5).premult_alpha()*(dist+supersample*0.5));
160 pool+=gradient(1.0-(dist-supersample*0.5),supersample*0.5).premult_alpha()*(-(dist-supersample*0.5));
161 return pool.demult_alpha();
164 return gradient(dist,supersample);
168 SpiralGradient::calc_supersample(const sinfg::Point &x, float pw,float ph)const
170 return (1.41421*pw/radius+(1.41421*pw/Point(x-center).mag())/(PI*2))*0.5;
174 SpiralGradient::hit_check(sinfg::Context context, const sinfg::Point &point)const
176 if(get_blend_method()==Color::BLEND_STRAIGHT && get_amount()>=0.5)
177 return const_cast<SpiralGradient*>(this);
178 if(get_amount()==0.0)
179 return context.hit_check(point);
180 if((get_blend_method()==Color::BLEND_STRAIGHT || get_blend_method()==Color::BLEND_COMPOSITE) && color_func(point).get_a()>0.5)
181 return const_cast<SpiralGradient*>(this);
182 return context.hit_check(point);
186 SpiralGradient::get_color(Context context, const Point &pos)const
188 const Color color(color_func(pos));
190 if(get_amount()==1.0 && get_blend_method()==Color::BLEND_STRAIGHT)
193 return Color::blend(color,context.get_color(pos),get_amount(),get_blend_method());
197 SpiralGradient::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
199 SuperCallback supercb(cb,0,9500,10000);
201 if(get_amount()==1.0 && get_blend_method()==Color::BLEND_STRAIGHT)
203 surface->set_wh(renddesc.get_w(),renddesc.get_h());
207 if(!context.accelerated_render(surface,quality,renddesc,&supercb))
216 Surface::pen pen(surface->begin());
217 const Real pw(renddesc.get_pw()),ph(renddesc.get_ph());
219 Point tl(renddesc.get_tl());
220 const int w(surface->get_w());
221 const int h(surface->get_h());
223 if(get_amount()==1.0 && get_blend_method()==Color::BLEND_STRAIGHT)
225 for(y=0,pos[1]=tl[1];y<h;y++,pen.inc_y(),pen.dec_x(x),pos[1]+=ph)
226 for(x=0,pos[0]=tl[0];x<w;x++,pen.inc_x(),pos[0]+=pw)
227 pen.put_value(color_func(pos,calc_supersample(pos,pw,ph)));
231 for(y=0,pos[1]=tl[1];y<h;y++,pen.inc_y(),pen.dec_x(x),pos[1]+=ph)
232 for(x=0,pos[0]=tl[0];x<w;x++,pen.inc_x(),pos[0]+=pw)
233 pen.put_value(Color::blend(color_func(pos,calc_supersample(pos,pw,ph)),pen.get_value(),get_amount(),get_blend_method()));
236 // Mark our progress as finished
237 if(cb && !cb->amount_complete(10000,10000))