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),
74 Layer_MotionBlur::set_param(const String ¶m, const ValueBase &value)
78 IMPORT(subsamples_factor);
79 IMPORT(subsampling_type);
80 IMPORT(subsample_start);
81 IMPORT(subsample_end);
82 return Layer_Composite::set_param(param,value);
86 Layer_MotionBlur::get_param(const String ¶m)const
89 EXPORT(subsamples_factor);
90 EXPORT(subsampling_type);
91 EXPORT(subsample_start);
92 EXPORT(subsample_end);
97 return Layer_Composite::get_param(param);
101 Layer_MotionBlur::set_time(Context context, Time time)const
103 context.set_time(time);
108 Layer_MotionBlur::set_time(Context context, Time time, const Point &pos)const
110 context.set_time(time,pos);
115 Layer_MotionBlur::get_color(Context context, const Point &pos)const
120 time+=(Vector::value_type)( (signed)(RAND_MAX/2)-(signed)rand() )/(Vector::value_type)(RAND_MAX) *aperture -aperture*0.5;
121 context.set_time(time, pos);
124 return context.get_color(pos);
128 Layer_MotionBlur::get_param_vocab()const
131 //ret=Layer_Composite::get_param_vocab();
133 ret.push_back(ParamDesc("aperture")
134 .set_local_name(_("Aperture"))
135 .set_description(_("Shutter Time"))
138 ret.push_back(ParamDesc("subsamples_factor")
139 .set_local_name(_("Subsamples Factor"))
140 .set_description(_("Multiplies The Number Of Subsamples Rendered"))
143 ret.push_back(ParamDesc("subsampling_type")
144 .set_local_name(_("Subsampling Type"))
145 .set_description(_("Curve Type For Weighting Subsamples"))
147 .add_enum_value(SUBSAMPLING_CONSTANT,"constant",_("Constant"))
148 .add_enum_value(SUBSAMPLING_LINEAR,"linear",_("Linear"))
149 .add_enum_value(SUBSAMPLING_HYPERBOLIC,"hyperbolic",_("Hyperbolic"))
152 ret.push_back(ParamDesc("subsample_start")
153 .set_local_name(_("Subsample Start Amount"))
154 .set_description(_("Relative Amount Of The First Subsample, For Linear Weighting"))
157 ret.push_back(ParamDesc("subsample_end")
158 .set_local_name(_("Subsample End Amount"))
159 .set_description(_("Relative Amount Of The Last Subsample, For Linear Weighting"))
166 Layer_MotionBlur::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
168 if(aperture && quality<=10)
171 SuperCallback subimagecb;
175 case 1: // Production Quality
178 case 2: // Excellent Quality
181 case 3: // Good Quality
184 case 4: // Moderate Quality
187 case 5: // Draft Quality
202 case 10: // Rough Quality
209 samples *= subsamples_factor;
211 if (samples <= 1) return context.accelerated_render(surface,quality,renddesc,cb);
213 // Only in modes where subsample_start/end matters...
214 if(subsampling_type == SUBSAMPLING_LINEAR)
216 // We won't render when the scale==0, so we'll use those samples elsewhere
217 if(subsample_start == 0) samples++;
218 if(subsample_end == 0) samples++;
223 float scale, divisor = 0;
225 surface->set_wh(renddesc.get_w(),renddesc.get_h());
228 // Render subsamples from time_cur-aperture to time_cur
229 for(i=0;i<samples;i++)
231 float pos = i/(samples-1.0);
232 float ipos = 1.0-pos;
233 switch(subsampling_type)
235 case SUBSAMPLING_LINEAR:
236 scale = ipos*subsample_start + pos*subsample_end;
238 case SUBSAMPLING_HYPERBOLIC:
239 scale = 1.0/(samples-i);
241 case SUBSAMPLING_CONSTANT:
243 scale = 1.0; // Weights don't matter for constant overall subsampling.
246 // Don't bother rendering if scale is zero
250 subimagecb=SuperCallback(cb,i*(5000/samples),(i+1)*(5000/samples),5000);
251 context.set_time(time_cur-aperture*ipos);
252 if(!context.accelerated_render(&tmp,quality,renddesc,&subimagecb))
254 for(int y=0;y<renddesc.get_h();y++)
255 for(int x=0;x<renddesc.get_w();x++)
256 (*surface)[y][x]+=tmp[y][x].premult_alpha()*scale;
258 for(int y=0;y<renddesc.get_h();y++)
259 for(int x=0;x<renddesc.get_w();x++)
260 (*surface)[y][x]=((*surface)[y][x]/divisor).demult_alpha();
263 return context.accelerated_render(surface,quality,renddesc,cb);