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, 2008 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),
66 subsamples_factor (1.0),
67 subsampling_type (SUBSAMPLING_HYPERBOLIC),
68 subsample_start (0.0),
71 Layer::Vocab voc(get_param_vocab());
72 Layer::fill_static(voc);
76 Layer_MotionBlur::set_param(const String ¶m, const ValueBase &value)
80 IMPORT(subsamples_factor);
81 IMPORT(subsampling_type);
82 IMPORT(subsample_start);
83 IMPORT(subsample_end);
84 return Layer_Composite::set_param(param,value);
88 Layer_MotionBlur::get_param(const String ¶m)const
91 EXPORT(subsamples_factor);
92 EXPORT(subsampling_type);
93 EXPORT(subsample_start);
94 EXPORT(subsample_end);
99 return Layer_Composite::get_param(param);
103 Layer_MotionBlur::set_time(Context context, Time time)const
105 context.set_time(time);
110 Layer_MotionBlur::set_time(Context context, Time time, const Point &pos)const
112 context.set_time(time,pos);
117 Layer_MotionBlur::get_color(Context context, const Point &pos)const
122 time+=(Vector::value_type)( (signed)(RAND_MAX/2)-(signed)rand() )/(Vector::value_type)(RAND_MAX) *aperture -aperture*0.5;
123 context.set_time(time, pos);
126 return context.get_color(pos);
130 Layer_MotionBlur::get_param_vocab()const
133 //ret=Layer_Composite::get_param_vocab();
135 ret.push_back(ParamDesc("aperture")
136 .set_local_name(_("Aperture"))
137 .set_description(_("Shutter Time"))
140 ret.push_back(ParamDesc("subsamples_factor")
141 .set_local_name(_("Subsamples Factor"))
142 .set_description(_("Multiplies The Number Of Subsamples Rendered"))
145 ret.push_back(ParamDesc("subsampling_type")
146 .set_local_name(_("Subsampling Type"))
147 .set_description(_("Curve Type For Weighting Subsamples"))
149 .add_enum_value(SUBSAMPLING_CONSTANT,"constant",_("Constant"))
150 .add_enum_value(SUBSAMPLING_LINEAR,"linear",_("Linear"))
151 .add_enum_value(SUBSAMPLING_HYPERBOLIC,"hyperbolic",_("Hyperbolic"))
154 ret.push_back(ParamDesc("subsample_start")
155 .set_local_name(_("Subsample Start Amount"))
156 .set_description(_("Relative Amount Of The First Subsample, For Linear Weighting"))
159 ret.push_back(ParamDesc("subsample_end")
160 .set_local_name(_("Subsample End Amount"))
161 .set_description(_("Relative Amount Of The Last Subsample, For Linear Weighting"))
168 Layer_MotionBlur::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
170 if(aperture && quality<=10)
173 SuperCallback subimagecb;
177 case 1: // Production Quality
180 case 2: // Excellent Quality
183 case 3: // Good Quality
186 case 4: // Moderate Quality
189 case 5: // Draft Quality
204 case 10: // Rough Quality
211 samples *= subsamples_factor;
213 if (samples <= 1) return context.accelerated_render(surface,quality,renddesc,cb);
215 // Only in modes where subsample_start/end matters...
216 if(subsampling_type == SUBSAMPLING_LINEAR)
218 // We won't render when the scale==0, so we'll use those samples elsewhere
219 if(subsample_start == 0) samples++;
220 if(subsample_end == 0) samples++;
225 float scale, divisor = 0;
227 surface->set_wh(renddesc.get_w(),renddesc.get_h());
230 // Render subsamples from time_cur-aperture to time_cur
231 for(i=0;i<samples;i++)
233 float pos = i/(samples-1.0);
234 float ipos = 1.0-pos;
235 switch(subsampling_type)
237 case SUBSAMPLING_LINEAR:
238 scale = ipos*subsample_start + pos*subsample_end;
240 case SUBSAMPLING_HYPERBOLIC:
241 scale = 1.0/(samples-i);
243 case SUBSAMPLING_CONSTANT:
245 scale = 1.0; // Weights don't matter for constant overall subsampling.
248 // Don't bother rendering if scale is zero
252 subimagecb=SuperCallback(cb,i*(5000/samples),(i+1)*(5000/samples),5000);
253 context.set_time(time_cur-aperture*ipos);
254 if(!context.accelerated_render(&tmp,quality,renddesc,&subimagecb))
256 for(int y=0;y<renddesc.get_h();y++)
257 for(int x=0;x<renddesc.get_w();x++)
258 (*surface)[y][x]+=tmp[y][x].premult_alpha()*scale;
260 for(int y=0;y<renddesc.get_h();y++)
261 for(int x=0;x<renddesc.get_w();x++)
262 (*surface)[y][x]=((*surface)[y][x]/divisor).demult_alpha();
265 return context.accelerated_render(surface,quality,renddesc,cb);