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

   1 /*! ========================================================================
   2 ** Sinfg
   3 ** Template File
   4 ** $Id: radialblur.cpp,v 1.1.1.1 2005/01/04 01:23:10 darco Exp $
   5 **
   6 ** Copyright (c) 2002 Robert B. Quattlebaum Jr.
   7 **
   8 ** This software and associated documentation
   9 ** are CONFIDENTIAL and PROPRIETARY property of
  10 ** the above-mentioned copyright holder.
  11 **
  12 ** You may not copy, print, publish, or in any
  13 ** other way distribute this software without
  14 ** a prior written agreement with
  15 ** the copyright holder.
  16 **
  17 ** === N O T E S ===========================================================
  18 **
  19 ** ========================================================================= */
  20
  21 /* === H E A D E R S ======================================================= */
  22
  23 #ifdef USING_PCH
  24 #       include "pch.h"
  25 #else
  26 #ifdef HAVE_CONFIG_H
  27 #       include <config.h>
  28 #endif
  29
  30 #include "radialblur.h"
  31 #include <sinfg/string.h>
  32 #include <sinfg/time.h>
  33 #include <sinfg/context.h>
  34 #include <sinfg/paramdesc.h>
  35 #include <sinfg/renddesc.h>
  36 #include <sinfg/surface.h>
  37 #include <sinfg/value.h>
  38 #include <sinfg/valuenode.h>
  39 #include <sinfg/transform.h>
  40 #include <ETL/misc>
  41
  42 #endif
  43
  44 /* === M A C R O S ========================================================= */
  45
  46 /* === G L O B A L S ======================================================= */
  47
  48 SINFG_LAYER_INIT(RadialBlur);
  49 SINFG_LAYER_SET_NAME(RadialBlur,"radial_blur");
  50 SINFG_LAYER_SET_LOCAL_NAME(RadialBlur,_("Radial Blur"));
  51 SINFG_LAYER_SET_CATEGORY(RadialBlur,_("Blurs"));
  52 SINFG_LAYER_SET_VERSION(RadialBlur,"0.1");
  53 SINFG_LAYER_SET_CVS_ID(RadialBlur,"$Id: radialblur.cpp,v 1.1.1.1 2005/01/04 01:23:10 darco Exp $");
  54
  55 /* === P R O C E D U R E S ================================================= */
  56
  57 /* === M E T H O D S ======================================================= */
  58
  59 /* === E N T R Y P O I N T ================================================= */
  60
  61 RadialBlur::RadialBlur():
  62         origin  (0,0),
  63         size    (0.2),
  64         fade_out(false)
  65 {
  66 }
  67
  68 RadialBlur::~RadialBlur()
  69 {
  70 }
  71
  72 bool
  73 RadialBlur::set_param(const String & param, const ValueBase &value)
  74 {
  75         IMPORT(origin);
  76         IMPORT(size);
  77         IMPORT(fade_out);
  78
  79         return Layer_Composite::set_param(param,value);
  80 }
  81
  82 ValueBase
  83 RadialBlur::get_param(const String &param)const
  84 {
  85         EXPORT(origin);
  86         EXPORT(size);
  87         EXPORT(fade_out);
  88
  89         EXPORT_NAME();
  90         EXPORT_VERSION();
  91
  92         return Layer_Composite::get_param(param);
  93 }
  94
  95 Layer::Vocab
  96 RadialBlur::get_param_vocab()const
  97 {
  98         Layer::Vocab ret(Layer_Composite::get_param_vocab());
  99
 100         ret.push_back(ParamDesc("origin")
 101                 .set_local_name(_("Origin"))
 102                 .set_description(_("Point where you want the origin to be"))
 103         );
 104
 105         ret.push_back(ParamDesc("size")
 106                 .set_local_name(_("Size"))
 107                 .set_description(_("Size of blur"))
 108                 .set_origin("origin")
 109         );
 110
 111         ret.push_back(ParamDesc("fade_out")
 112                 .set_local_name(_("Fade Out"))
 113         );
 114
 115         return ret;
 116 }
 117
 118 Color
 119 RadialBlur::get_color(Context context, const Point &p)const
 120 {
 121         //! \writeme
 122         return context.get_color(p);
 123 }
 124
 125 bool
 126 RadialBlur::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
 127 {
 128         if(cb && !cb->amount_complete(0,10000))
 129                 return false;
 130
 131         Surface tmp_surface;
 132
 133         if(!context.accelerated_render(surface,quality,renddesc,cb))
 134                 return false;
 135
 136         tmp_surface=*surface;
 137
 138         int x,y;
 139
 140         const Point tl(renddesc.get_tl());
 141         Point pos;
 142         const int w(surface->get_w());
 143         const int h(surface->get_h());
 144         const Real pw(renddesc.get_pw()),ph(renddesc.get_ph());
 145
 146         Surface::alpha_pen apen(surface->begin());
 147
 148         apen.set_alpha(get_amount());
 149         apen.set_blend_method(get_blend_method());
 150
 151         int steps(5);
 152
 153         if(quality>=9)steps=20;
 154         else if(quality>=5)steps=30;
 155         else if(quality>=4)steps=60;
 156         else if(quality>=3)steps=100;
 157         else steps=120;
 158
 159         Surface::value_prep_type cooker;
 160
 161         for(y=0,pos[1]=tl[1];y<h;y++,apen.inc_y(),apen.dec_x(x),pos[1]+=ph)
 162                 for(x=0,pos[0]=tl[0];x<w;x++,apen.inc_x(),pos[0]+=pw)
 163                 {
 164                         Point
 165                                 begin(pos-tl),
 166                                 end((pos-origin)*(1.0f-size)+origin-tl);
 167                         begin[0]/=pw;begin[1]/=ph;
 168                         end[0]/=pw;end[1]/=ph;
 169
 170                         Color pool(Color::alpha());
 171                         int poolsize(0);
 172
 173                         int x0(round_to_int(begin[0])),
 174                                 y0(round_to_int(begin[1])),
 175                                 x1(round_to_int(end[0])),
 176                                 y1(round_to_int(end[1]));
 177
 178                         int i;
 179                         int steep = 1;
 180                         int sx, sy;  /* step positive or negative (1 or -1) */
 181                         int dx, dy;  /* delta (difference in X and Y between points) */
 182                         int e;
 183                         int w(tmp_surface.get_w()),h(tmp_surface.get_h());
 184
 185                         dx = abs(x1 - x0);
 186                         sx = ((x1 - x0) > 0) ? 1 : -1;
 187                         dy = abs(y1 - y0);
 188                         sy = ((y1 - y0) > 0) ? 1 : -1;
 189                         if (dy > dx)
 190                         {
 191                                 steep = 0;
 192                                 swap(x0, y0);
 193                                 swap(dx, dy);
 194                                 swap(sx, sy);
 195                                 swap(w,h);
 196                         }
 197                         e = (dy << 1) - dx;
 198                         for (i = 0; i < dx; i++)
 199                         {
 200                                 if(y0>=0 && x0>=0 && y0<h && x0<w)
 201                                 {
 202                                         if(fade_out)
 203                                         {
 204                                                 if (steep)
 205                                                         pool+=cooker.cook(tmp_surface[y0][x0])*(i-dx);
 206                                                 else
 207                                                         pool+=cooker.cook(tmp_surface[x0][y0])*(i-dx);
 208                                                 poolsize+=(i-dx);
 209                                         }
 210                                         else
 211                                         {
 212                                                 if (steep)
 213                                                         pool+=cooker.cook(tmp_surface[y0][x0]);
 214                                                 else
 215                                                         pool+=cooker.cook(tmp_surface[x0][y0]);
 216                                                 poolsize+=1;
 217                                         }
 218                                 }
 219
 220                                 while (e >= 0)
 221                                 {
 222                                         y0 += sy;
 223                                         e -= (dx << 1);
 224                                 }
 225                                 x0 += sx;
 226                                 e += (dy << 1);
 227                         }
 228                         if(poolsize)
 229                         {
 230                                 pool/=poolsize;
 231                                 apen.put_value(cooker.uncook(pool));
 232                         }
 233 /*
 234                         Point begin,end;
 235                         begin=pos;
 236                         end=(pos-origin)*(1.0f-size)+origin;
 237
 238                         Color pool(Color::alpha());
 239                         float f,poolsize(0);
 240                         int i;
 241                         int steps(steps*size);
 242                         for(f=0,i=0;i<steps;i++,f+=1.0f/(steps-1))
 243                         {
 244                                 Point loc((end-begin)*f+begin-tl);
 245                                 loc[0]/=pw;loc[1]/=ph;
 246
 247                                 if(fade_out)
 248                                         pool+=tmp_surface.linear_sample(loc[0],loc[1])*(i-steps),poolsize+=(i-steps);
 249                                 else
 250                                         pool+=tmp_surface.linear_sample(loc[0],loc[1]),poolsize+=1;
 251                         }
 252                         pool/=poolsize;
 253                         apen.put_value(pool);
 254 */
 255                 }
 256
 257
 258         if(cb && !cb->amount_complete(10000,10000)) return false;
 259
 260         return true;
 261 }