synfig-core/trunk/src/modules/mod_filter/radialblur.cpp

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file radialblur.cpp
   3 **      \brief Template Header
   4 **
   5 **      \legal
   6 **      Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
   7 **
   8 **      This package is free software; you can redistribute it and/or
   9 **      modify it under the terms of the GNU General Public License as
  10 **      published by the Free Software Foundation; either version 2 of
  11 **      the License, or (at your option) any later version.
  12 **
  13 **      This package is distributed in the hope that it will be useful,
  14 **      but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 **      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16 **      General Public License for more details.
  17 **      \endlegal
  18 **
  19 ** === N O T E S ===========================================================
  20 **
  21 ** ========================================================================= */
  22
  23 /* === H E A D E R S ======================================================= */
  24
  25 #ifdef USING_PCH
  26 #       include "pch.h"
  27 #else
  28 #ifdef HAVE_CONFIG_H
  29 #       include <config.h>
  30 #endif
  31
  32 #include "radialblur.h"
  33 #include <synfig/string.h>
  34 #include <synfig/time.h>
  35 #include <synfig/context.h>
  36 #include <synfig/paramdesc.h>
  37 #include <synfig/renddesc.h>
  38 #include <synfig/surface.h>
  39 #include <synfig/value.h>
  40 #include <synfig/valuenode.h>
  41 #include <synfig/transform.h>
  42 #include <ETL/misc>
  43
  44 #endif
  45
  46 /* === M A C R O S ========================================================= */
  47
  48 /* === G L O B A L S ======================================================= */
  49
  50 SYNFIG_LAYER_INIT(RadialBlur);
  51 SYNFIG_LAYER_SET_NAME(RadialBlur,"radial_blur");
  52 SYNFIG_LAYER_SET_LOCAL_NAME(RadialBlur,_("Radial Blur"));
  53 SYNFIG_LAYER_SET_CATEGORY(RadialBlur,_("Blurs"));
  54 SYNFIG_LAYER_SET_VERSION(RadialBlur,"0.1");
  55 SYNFIG_LAYER_SET_CVS_ID(RadialBlur,"$Id: radialblur.cpp,v 1.1.1.1 2005/01/04 01:23:10 darco Exp $");
  56
  57 /* === P R O C E D U R E S ================================================= */
  58
  59 /* === M E T H O D S ======================================================= */
  60
  61 /* === E N T R Y P O I N T ================================================= */
  62
  63 RadialBlur::RadialBlur():
  64         origin  (0,0),
  65         size    (0.2),
  66         fade_out(false)
  67 {
  68 }
  69
  70 RadialBlur::~RadialBlur()
  71 {
  72 }
  73
  74 bool
  75 RadialBlur::set_param(const String & param, const ValueBase &value)
  76 {
  77         IMPORT(origin);
  78         IMPORT(size);
  79         IMPORT(fade_out);
  80
  81         return Layer_Composite::set_param(param,value);
  82 }
  83
  84 ValueBase
  85 RadialBlur::get_param(const String &param)const
  86 {
  87         EXPORT(origin);
  88         EXPORT(size);
  89         EXPORT(fade_out);
  90
  91         EXPORT_NAME();
  92         EXPORT_VERSION();
  93
  94         return Layer_Composite::get_param(param);
  95 }
  96
  97 Layer::Vocab
  98 RadialBlur::get_param_vocab()const
  99 {
 100         Layer::Vocab ret(Layer_Composite::get_param_vocab());
 101
 102         ret.push_back(ParamDesc("origin")
 103                 .set_local_name(_("Origin"))
 104                 .set_description(_("Point where you want the origin to be"))
 105         );
 106
 107         ret.push_back(ParamDesc("size")
 108                 .set_local_name(_("Size"))
 109                 .set_description(_("Size of blur"))
 110                 .set_origin("origin")
 111         );
 112
 113         ret.push_back(ParamDesc("fade_out")
 114                 .set_local_name(_("Fade Out"))
 115         );
 116
 117         return ret;
 118 }
 119
 120 Color
 121 RadialBlur::get_color(Context context, const Point &p)const
 122 {
 123         //! \writeme
 124         return context.get_color(p);
 125 }
 126
 127 bool
 128 RadialBlur::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
 129 {
 130         if(cb && !cb->amount_complete(0,10000))
 131                 return false;
 132
 133         Surface tmp_surface;
 134
 135         if(!context.accelerated_render(surface,quality,renddesc,cb))
 136                 return false;
 137
 138         tmp_surface=*surface;
 139
 140         int x,y;
 141
 142         const Point tl(renddesc.get_tl());
 143         Point pos;
 144         const int w(surface->get_w());
 145         const int h(surface->get_h());
 146         const Real pw(renddesc.get_pw()),ph(renddesc.get_ph());
 147
 148         Surface::alpha_pen apen(surface->begin());
 149
 150         apen.set_alpha(get_amount());
 151         apen.set_blend_method(get_blend_method());
 152
 153         int steps(5);
 154
 155         if(quality>=9)steps=20;
 156         else if(quality>=5)steps=30;
 157         else if(quality>=4)steps=60;
 158         else if(quality>=3)steps=100;
 159         else steps=120;
 160
 161         Surface::value_prep_type cooker;
 162
 163         for(y=0,pos[1]=tl[1];y<h;y++,apen.inc_y(),apen.dec_x(x),pos[1]+=ph)
 164                 for(x=0,pos[0]=tl[0];x<w;x++,apen.inc_x(),pos[0]+=pw)
 165                 {
 166                         Point
 167                                 begin(pos-tl),
 168                                 end((pos-origin)*(1.0f-size)+origin-tl);
 169                         begin[0]/=pw;begin[1]/=ph;
 170                         end[0]/=pw;end[1]/=ph;
 171
 172                         Color pool(Color::alpha());
 173                         int poolsize(0);
 174
 175                         int x0(round_to_int(begin[0])),
 176                                 y0(round_to_int(begin[1])),
 177                                 x1(round_to_int(end[0])),
 178                                 y1(round_to_int(end[1]));
 179
 180                         int i;
 181                         int steep = 1;
 182                         int sx, sy;  /* step positive or negative (1 or -1) */
 183                         int dx, dy;  /* delta (difference in X and Y between points) */
 184                         int e;
 185                         int w(tmp_surface.get_w()),h(tmp_surface.get_h());
 186
 187                         dx = abs(x1 - x0);
 188                         sx = ((x1 - x0) > 0) ? 1 : -1;
 189                         dy = abs(y1 - y0);
 190                         sy = ((y1 - y0) > 0) ? 1 : -1;
 191                         if (dy > dx)
 192                         {
 193                                 steep = 0;
 194                                 swap(x0, y0);
 195                                 swap(dx, dy);
 196                                 swap(sx, sy);
 197                                 swap(w,h);
 198                         }
 199                         e = (dy << 1) - dx;
 200                         for (i = 0; i < dx; i++)
 201                         {
 202                                 if(y0>=0 && x0>=0 && y0<h && x0<w)
 203                                 {
 204                                         if(fade_out)
 205                                         {
 206                                                 if (steep)
 207                                                         pool+=cooker.cook(tmp_surface[y0][x0])*(i-dx);
 208                                                 else
 209                                                         pool+=cooker.cook(tmp_surface[x0][y0])*(i-dx);
 210                                                 poolsize+=(i-dx);
 211                                         }
 212                                         else
 213                                         {
 214                                                 if (steep)
 215                                                         pool+=cooker.cook(tmp_surface[y0][x0]);
 216                                                 else
 217                                                         pool+=cooker.cook(tmp_surface[x0][y0]);
 218                                                 poolsize+=1;
 219                                         }
 220                                 }
 221
 222                                 while (e >= 0)
 223                                 {
 224                                         y0 += sy;
 225                                         e -= (dx << 1);
 226                                 }
 227                                 x0 += sx;
 228                                 e += (dy << 1);
 229                         }
 230                         if(poolsize)
 231                         {
 232                                 pool/=poolsize;
 233                                 apen.put_value(cooker.uncook(pool));
 234                         }
 235 /*
 236                         Point begin,end;
 237                         begin=pos;
 238                         end=(pos-origin)*(1.0f-size)+origin;
 239
 240                         Color pool(Color::alpha());
 241                         float f,poolsize(0);
 242                         int i;
 243                         int steps(steps*size);
 244                         for(f=0,i=0;i<steps;i++,f+=1.0f/(steps-1))
 245                         {
 246                                 Point loc((end-begin)*f+begin-tl);
 247                                 loc[0]/=pw;loc[1]/=ph;
 248
 249                                 if(fade_out)
 250                                         pool+=tmp_surface.linear_sample(loc[0],loc[1])*(i-steps),poolsize+=(i-steps);
 251                                 else
 252                                         pool+=tmp_surface.linear_sample(loc[0],loc[1]),poolsize+=1;
 253                         }
 254                         pool/=poolsize;
 255                         apen.put_value(pool);
 256 */
 257                 }
 258
 259
 260         if(cb && !cb->amount_complete(10000,10000)) return false;
 261
 262         return true;
 263 }