synfig-core/tags/synfig_0_61_06/src/modules/mod_filter/radialblur.cpp

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file radialblur.cpp
   3 **      \brief Template Header
   4 **
   5 **      $Id$
   6 **
   7 **      \legal
   8 **      Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
   9 **
  10 **      This package is free software; you can redistribute it and/or
  11 **      modify it under the terms of the GNU General Public License as
  12 **      published by the Free Software Foundation; either version 2 of
  13 **      the License, or (at your option) any later version.
  14 **
  15 **      This package is distributed in the hope that it will be useful,
  16 **      but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 **      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  18 **      General Public License for more details.
  19 **      \endlegal
  20 **
  21 ** === N O T E S ===========================================================
  22 **
  23 ** ========================================================================= */
  24
  25 /* === H E A D E R S ======================================================= */
  26
  27 #ifdef USING_PCH
  28 #       include "pch.h"
  29 #else
  30 #ifdef HAVE_CONFIG_H
  31 #       include <config.h>
  32 #endif
  33
  34 #include "radialblur.h"
  35 #include <synfig/string.h>
  36 #include <synfig/time.h>
  37 #include <synfig/context.h>
  38 #include <synfig/paramdesc.h>
  39 #include <synfig/renddesc.h>
  40 #include <synfig/surface.h>
  41 #include <synfig/value.h>
  42 #include <synfig/valuenode.h>
  43 #include <synfig/transform.h>
  44 #include <ETL/misc>
  45
  46 #endif
  47
  48 /* === M A C R O S ========================================================= */
  49
  50 /* === G L O B A L S ======================================================= */
  51
  52 SYNFIG_LAYER_INIT(RadialBlur);
  53 SYNFIG_LAYER_SET_NAME(RadialBlur,"radial_blur");
  54 SYNFIG_LAYER_SET_LOCAL_NAME(RadialBlur,_("Radial Blur"));
  55 SYNFIG_LAYER_SET_CATEGORY(RadialBlur,_("Blurs"));
  56 SYNFIG_LAYER_SET_VERSION(RadialBlur,"0.1");
  57 SYNFIG_LAYER_SET_CVS_ID(RadialBlur,"$Id$");
  58
  59 /* === P R O C E D U R E S ================================================= */
  60
  61 /* === M E T H O D S ======================================================= */
  62
  63 /* === E N T R Y P O I N T ================================================= */
  64
  65 RadialBlur::RadialBlur():
  66         origin  (0,0),
  67         size    (0.2),
  68         fade_out(false)
  69 {
  70 }
  71
  72 RadialBlur::~RadialBlur()
  73 {
  74 }
  75
  76 bool
  77 RadialBlur::set_param(const String & param, const ValueBase &value)
  78 {
  79         IMPORT(origin);
  80         IMPORT(size);
  81         IMPORT(fade_out);
  82
  83         return Layer_Composite::set_param(param,value);
  84 }
  85
  86 ValueBase
  87 RadialBlur::get_param(const String &param)const
  88 {
  89         EXPORT(origin);
  90         EXPORT(size);
  91         EXPORT(fade_out);
  92
  93         EXPORT_NAME();
  94         EXPORT_VERSION();
  95
  96         return Layer_Composite::get_param(param);
  97 }
  98
  99 Layer::Vocab
 100 RadialBlur::get_param_vocab()const
 101 {
 102         Layer::Vocab ret(Layer_Composite::get_param_vocab());
 103
 104         ret.push_back(ParamDesc("origin")
 105                 .set_local_name(_("Origin"))
 106                 .set_description(_("Point where you want the origin to be"))
 107         );
 108
 109         ret.push_back(ParamDesc("size")
 110                 .set_local_name(_("Size"))
 111                 .set_description(_("Size of blur"))
 112                 .set_origin("origin")
 113         );
 114
 115         ret.push_back(ParamDesc("fade_out")
 116                 .set_local_name(_("Fade Out"))
 117         );
 118
 119         return ret;
 120 }
 121
 122 Color
 123 RadialBlur::get_color(Context context, const Point &p)const
 124 {
 125         //! \writeme
 126         return context.get_color(p);
 127 }
 128
 129 bool
 130 RadialBlur::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
 131 {
 132         if(cb && !cb->amount_complete(0,10000))
 133                 return false;
 134
 135         Surface tmp_surface;
 136
 137         if(!context.accelerated_render(surface,quality,renddesc,cb))
 138                 return false;
 139
 140         tmp_surface=*surface;
 141
 142         int x,y;
 143
 144         const Point tl(renddesc.get_tl());
 145         Point pos;
 146         const int w(surface->get_w());
 147         const int h(surface->get_h());
 148         const Real pw(renddesc.get_pw()),ph(renddesc.get_ph());
 149
 150         Surface::alpha_pen apen(surface->begin());
 151
 152         apen.set_alpha(get_amount());
 153         apen.set_blend_method(get_blend_method());
 154
 155         int steps(5);
 156
 157         if(quality>=9)steps=20;
 158         else if(quality>=5)steps=30;
 159         else if(quality>=4)steps=60;
 160         else if(quality>=3)steps=100;
 161         else steps=120;
 162
 163         Surface::value_prep_type cooker;
 164
 165         for(y=0,pos[1]=tl[1];y<h;y++,apen.inc_y(),apen.dec_x(x),pos[1]+=ph)
 166                 for(x=0,pos[0]=tl[0];x<w;x++,apen.inc_x(),pos[0]+=pw)
 167                 {
 168                         Point
 169                                 begin(pos-tl),
 170                                 end((pos-origin)*(1.0f-size)+origin-tl);
 171                         begin[0]/=pw;begin[1]/=ph;
 172                         end[0]/=pw;end[1]/=ph;
 173
 174                         Color pool(Color::alpha());
 175                         int poolsize(0);
 176
 177                         int x0(round_to_int(begin[0])),
 178                                 y0(round_to_int(begin[1])),
 179                                 x1(round_to_int(end[0])),
 180                                 y1(round_to_int(end[1]));
 181
 182                         int i;
 183                         int steep = 1;
 184                         int sx, sy;  /* step positive or negative (1 or -1) */
 185                         int dx, dy;  /* delta (difference in X and Y between points) */
 186                         int e;
 187                         int w(tmp_surface.get_w()),h(tmp_surface.get_h());
 188
 189                         dx = abs(x1 - x0);
 190                         sx = ((x1 - x0) > 0) ? 1 : -1;
 191                         dy = abs(y1 - y0);
 192                         sy = ((y1 - y0) > 0) ? 1 : -1;
 193                         if (dy > dx)
 194                         {
 195                                 steep = 0;
 196                                 swap(x0, y0);
 197                                 swap(dx, dy);
 198                                 swap(sx, sy);
 199                                 swap(w,h);
 200                         }
 201                         e = (dy << 1) - dx;
 202                         for (i = 0; i < dx; i++)
 203                         {
 204                                 if(y0>=0 && x0>=0 && y0<h && x0<w)
 205                                 {
 206                                         if(fade_out)
 207                                         {
 208                                                 if (steep)
 209                                                         pool+=cooker.cook(tmp_surface[y0][x0])*(i-dx);
 210                                                 else
 211                                                         pool+=cooker.cook(tmp_surface[x0][y0])*(i-dx);
 212                                                 poolsize+=(i-dx);
 213                                         }
 214                                         else
 215                                         {
 216                                                 if (steep)
 217                                                         pool+=cooker.cook(tmp_surface[y0][x0]);
 218                                                 else
 219                                                         pool+=cooker.cook(tmp_surface[x0][y0]);
 220                                                 poolsize+=1;
 221                                         }
 222                                 }
 223
 224                                 while (e >= 0)
 225                                 {
 226                                         y0 += sy;
 227                                         e -= (dx << 1);
 228                                 }
 229                                 x0 += sx;
 230                                 e += (dy << 1);
 231                         }
 232                         if(poolsize)
 233                         {
 234                                 pool/=poolsize;
 235                                 apen.put_value(cooker.uncook(pool));
 236                         }
 237 /*
 238                         Point begin,end;
 239                         begin=pos;
 240                         end=(pos-origin)*(1.0f-size)+origin;
 241
 242                         Color pool(Color::alpha());
 243                         float f,poolsize(0);
 244                         int i;
 245                         int steps(steps*size);
 246                         for(f=0,i=0;i<steps;i++,f+=1.0f/(steps-1))
 247                         {
 248                                 Point loc((end-begin)*f+begin-tl);
 249                                 loc[0]/=pw;loc[1]/=ph;
 250
 251                                 if(fade_out)
 252                                         pool+=tmp_surface.linear_sample(loc[0],loc[1])*(i-steps),poolsize+=(i-steps);
 253                                 else
 254                                         pool+=tmp_surface.linear_sample(loc[0],loc[1]),poolsize+=1;
 255                         }
 256                         pool/=poolsize;
 257                         apen.put_value(pool);
 258 */
 259                 }
 260
 261
 262         if(cb && !cb->amount_complete(10000,10000)) return false;
 263
 264         return true;
 265 }