1 /* === S Y N F I G ========================================================= */
2 /*! \file layer_motionblur.cpp
3 ** \brief Implementation of the "Motion Blur" layer
8 ** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
9 ** Copyright (c) 2007 Chris Moore
11 ** This package is free software; you can redistribute it and/or
12 ** modify it under the terms of the GNU General Public License as
13 ** published by the Free Software Foundation; either version 2 of
14 ** the License, or (at your option) any later version.
16 ** This package is distributed in the hope that it will be useful,
17 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
18 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 ** General Public License for more details.
22 /* ========================================================================= */
24 /* === H E A D E R S ======================================================= */
34 #include "layer_motionblur.h"
37 #include "paramdesc.h"
41 #include "valuenode.h"
46 /* === U S I N G =========================================================== */
48 using namespace synfig;
52 /* === G L O B A L S ======================================================= */
54 SYNFIG_LAYER_INIT(Layer_MotionBlur);
55 SYNFIG_LAYER_SET_NAME(Layer_MotionBlur,"MotionBlur"); // todo: use motion_blur
56 SYNFIG_LAYER_SET_LOCAL_NAME(Layer_MotionBlur,N_("Motion Blur"));
57 SYNFIG_LAYER_SET_CATEGORY(Layer_MotionBlur,N_("Blurs"));
58 SYNFIG_LAYER_SET_VERSION(Layer_MotionBlur,"0.1");
59 SYNFIG_LAYER_SET_CVS_ID(Layer_MotionBlur,"$Id$");
61 /* === M E M B E R S ======================================================= */
63 Layer_MotionBlur::Layer_MotionBlur():
64 Layer_Composite (1.0,Color::BLEND_STRAIGHT),
70 Layer_MotionBlur::set_param(const String ¶m, const ValueBase &value)
74 return Layer_Composite::set_param(param,value);
78 Layer_MotionBlur::get_param(const String ¶m)const
85 return Layer_Composite::get_param(param);
89 Layer_MotionBlur::set_time(Context context, Time time)const
91 context.set_time(time);
96 Layer_MotionBlur::set_time(Context context, Time time, const Point &pos)const
98 context.set_time(time,pos);
103 Layer_MotionBlur::get_color(Context context, const Point &pos)const
108 time+=(Vector::value_type)( (signed)(RAND_MAX/2)-(signed)rand() )/(Vector::value_type)(RAND_MAX) *aperture -aperture*0.5;
109 context.set_time(time, pos);
112 return context.get_color(pos);
116 Layer_MotionBlur::get_param_vocab()const
119 //ret=Layer_Composite::get_param_vocab();
121 ret.push_back(ParamDesc("aperture")
122 .set_local_name(_("Aperture"))
123 .set_description(_("Shutter Time"))
130 Layer_MotionBlur::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
132 if(aperture && quality<=10)
135 SuperCallback subimagecb;
139 case 1: // Production Quality
142 case 2: // Excellent Quality
145 case 3: // Good Quality
148 case 4: // Moderate Quality
151 case 5: // Draft Quality
166 case 10: // Rough Quality
173 if (samples == 1) return context.accelerated_render(surface,quality,renddesc,cb);
177 float scale, divisor = 0;
179 surface->set_wh(renddesc.get_w(),renddesc.get_h());
182 for(i=0;i<samples;i++)
184 subimagecb=SuperCallback(cb,i*(5000/samples),(i+1)*(5000/samples),5000);
185 context.set_time(time_cur-(aperture*(samples-1-i)/(samples-1)));
186 if(!context.accelerated_render(&tmp,quality,renddesc,&subimagecb))
188 scale = 1.0/(samples-i);
190 for(int y=0;y<renddesc.get_h();y++)
191 for(int x=0;x<renddesc.get_w();x++)
192 (*surface)[y][x]+=tmp[y][x].premult_alpha()*scale;
194 for(int y=0;y<renddesc.get_h();y++)
195 for(int x=0;x<renddesc.get_w();x++)
196 (*surface)[y][x]=((*surface)[y][x]/divisor).demult_alpha();
199 return context.accelerated_render(surface,quality,renddesc,cb);