synfig-core/tags/synfig_0_61_07_rc3/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 **      Copyright (c) 2007 Chris Moore
  10 **
  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.
  15 **
  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.
  20 **      \endlegal
  21 **
  22 ** === N O T E S ===========================================================
  23 **
  24 ** ========================================================================= */
  25
  26 /* === H E A D E R S ======================================================= */
  27
  28 #ifdef USING_PCH
  29 #       include "pch.h"
  30 #else
  31 #ifdef HAVE_CONFIG_H
  32 #       include <config.h>
  33 #endif
  34
  35 #include "radialblur.h"
  36 #include <synfig/string.h>
  37 #include <synfig/time.h>
  38 #include <synfig/context.h>
  39 #include <synfig/paramdesc.h>
  40 #include <synfig/renddesc.h>
  41 #include <synfig/surface.h>
  42 #include <synfig/value.h>
  43 #include <synfig/valuenode.h>
  44 #include <synfig/transform.h>
  45 #include <ETL/misc>
  46
  47 #endif
  48
  49 /* === M A C R O S ========================================================= */
  50
  51 /* === G L O B A L S ======================================================= */
  52
  53 SYNFIG_LAYER_INIT(RadialBlur);
  54 SYNFIG_LAYER_SET_NAME(RadialBlur,"radial_blur");
  55 SYNFIG_LAYER_SET_LOCAL_NAME(RadialBlur,_("Radial Blur"));
  56 SYNFIG_LAYER_SET_CATEGORY(RadialBlur,_("Blurs"));
  57 SYNFIG_LAYER_SET_VERSION(RadialBlur,"0.1");
  58 SYNFIG_LAYER_SET_CVS_ID(RadialBlur,"$Id$");
  59
  60 /* === P R O C E D U R E S ================================================= */
  61
  62 /* === M E T H O D S ======================================================= */
  63
  64 /* === E N T R Y P O I N T ================================================= */
  65
  66 RadialBlur::RadialBlur():
  67         origin  (0,0),
  68         size    (0.2),
  69         fade_out(false)
  70 {
  71 }
  72
  73 RadialBlur::~RadialBlur()
  74 {
  75 }
  76
  77 bool
  78 RadialBlur::set_param(const String & param, const ValueBase &value)
  79 {
  80         IMPORT(origin);
  81         IMPORT(size);
  82         IMPORT(fade_out);
  83
  84         return Layer_Composite::set_param(param,value);
  85 }
  86
  87 ValueBase
  88 RadialBlur::get_param(const String &param)const
  89 {
  90         EXPORT(origin);
  91         EXPORT(size);
  92         EXPORT(fade_out);
  93
  94         EXPORT_NAME();
  95         EXPORT_VERSION();
  96
  97         return Layer_Composite::get_param(param);
  98 }
  99
 100 Layer::Vocab
 101 RadialBlur::get_param_vocab()const
 102 {
 103         Layer::Vocab ret(Layer_Composite::get_param_vocab());
 104
 105         ret.push_back(ParamDesc("origin")
 106                 .set_local_name(_("Origin"))
 107                 .set_description(_("Point where you want the origin to be"))
 108         );
 109
 110         ret.push_back(ParamDesc("size")
 111                 .set_local_name(_("Size"))
 112                 .set_description(_("Size of blur"))
 113                 .set_origin("origin")
 114         );
 115
 116         ret.push_back(ParamDesc("fade_out")
 117                 .set_local_name(_("Fade Out"))
 118         );
 119
 120         return ret;
 121 }
 122
 123 Color
 124 RadialBlur::get_color(Context context, const Point &p)const
 125 {
 126         //! \writeme
 127         return context.get_color(p);
 128 }
 129
 130 bool
 131 RadialBlur::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
 132 {
 133         if(cb && !cb->amount_complete(0,10000))
 134                 return false;
 135
 136         Surface tmp_surface;
 137         const Point tl(renddesc.get_tl()), br(renddesc.get_br());
 138         const int w(renddesc.get_w()), h(renddesc.get_h());
 139         const Real pw(renddesc.get_pw()),ph(renddesc.get_ph());
 140
 141         Rect rect(tl, br);
 142         Point pos;
 143
 144         // find how far towards the origin of the blur we are going to
 145         // wander for each of the 4 corners of our tile, expanding the
 146         // render description for each of them if necessary
 147         int x, y;
 148         for(y=0,pos[1]=tl[1];y<h;y+=(h-1),pos[1]+=ph*(h-1))
 149                 for(x=0,pos[0]=tl[0];x<w;x+=(w-1),pos[0]+=pw*(w-1))
 150                         rect.expand((pos-origin)*(1.0f-size) + origin);
 151
 152         // round out to the nearest pixel
 153         Point tmp_surface_tl = Point(tl[0] - pw*(int((tl[0]-rect.get_min()[0])/pw+1-1e-6)),
 154                                                                  tl[1] - ph*(int((tl[1]-rect.get_max()[1])/ph+1-1e-6)));
 155         Point tmp_surface_br = Point(br[0] + pw*(int((rect.get_max()[0]-br[0])/pw+2-1e-6)),
 156                                                                  br[1] + ph*(int((rect.get_min()[1]-br[1])/ph+2-1e-6)));
 157
 158         // round to nearest integer width and height (should be very
 159         // nearly whole numbers already, but dont want to round 5.99999
 160         // down to 5)
 161         int tmp_surface_width = int((tmp_surface_br[0]-tmp_surface_tl[0])/pw + 0.5);
 162         int tmp_surface_height = int((tmp_surface_br[1]-tmp_surface_tl[1])/ph + 0.5);
 163
 164         RendDesc desc(renddesc);
 165         desc.clear_flags();
 166         desc.set_wh(tmp_surface_width,tmp_surface_height);
 167         desc.set_tl(tmp_surface_tl);
 168         desc.set_br(tmp_surface_br);
 169
 170         // render the layers beneath us
 171         if(!context.accelerated_render(&tmp_surface,quality,desc,cb))
 172                 return false;
 173
 174         // copy the part of the layers beneath us that corresponds to this tile
 175         surface->set_wh(w, h);
 176         Surface::pen pen(surface->get_pen(0, 0));
 177         tmp_surface.blit_to(pen,
 178                                                 int((tl[0] - tmp_surface_tl[0])/pw + 0.5),
 179                                                 int((tl[1] - tmp_surface_tl[1])/ph + 0.5),
 180                                                 w, h);
 181
 182         Surface::alpha_pen apen(surface->begin());
 183
 184         apen.set_alpha(get_amount());
 185         apen.set_blend_method(get_blend_method());
 186
 187 /*
 188         int steps(5);
 189
 190         if(quality>=9)steps=20;
 191         else if(quality>=5)steps=30;
 192         else if(quality>=4)steps=60;
 193         else if(quality>=3)steps=100;
 194         else steps=120;
 195 */
 196
 197         Surface::value_prep_type cooker;
 198
 199         // loop through the pixels
 200         for(y=0,pos[1]=tl[1];y<h;y++,apen.inc_y(),apen.dec_x(x),pos[1]+=ph)
 201                 for(x=0,pos[0]=tl[0];x<w;x++,apen.inc_x(),pos[0]+=pw)
 202                 {
 203                         Point
 204                                 begin(pos-tmp_surface_tl),
 205                                 end((pos-origin)*(1.0f-size) + origin-tmp_surface_tl);
 206                         begin[0]/=pw;begin[1]/=ph;
 207                         end[0]/=pw;end[1]/=ph;
 208
 209                         Color pool(Color::alpha());
 210                         int poolsize(0);
 211
 212                         int x0(round_to_int(begin[0])),
 213                                 y0(round_to_int(begin[1])),
 214                                 x1(round_to_int(end[0])),
 215                                 y1(round_to_int(end[1]));
 216
 217                         int i;
 218                         int steep = 1;
 219                         int sx, sy;  /* step positive or negative (1 or -1) */
 220                         int dx, dy;  /* delta (difference in X and Y between points) */
 221                         int e;
 222                         int w(tmp_surface_width), h(tmp_surface_height);
 223
 224                         dx = abs(x1 - x0);
 225                         sx = ((x1 - x0) > 0) ? 1 : -1;
 226                         dy = abs(y1 - y0);
 227                         sy = ((y1 - y0) > 0) ? 1 : -1;
 228                         if (dy > dx)
 229                         {
 230                                 steep = 0;
 231                                 swap(x0, y0);
 232                                 swap(dx, dy);
 233                                 swap(sx, sy);
 234                                 swap(w,h);
 235                         }
 236                         e = (dy << 1) - dx;
 237                         for (i = 0; i < dx; i++)
 238                         {
 239                                 if(y0>=0 && x0>=0 && y0<h && x0<w)
 240                                 {
 241                                         if(fade_out)
 242                                         {
 243                                                 if (steep)
 244                                                         pool+=cooker.cook(tmp_surface[y0][x0])*(i-dx);
 245                                                 else
 246                                                         pool+=cooker.cook(tmp_surface[x0][y0])*(i-dx);
 247                                                 poolsize+=(i-dx);
 248                                         }
 249                                         else
 250                                         {
 251                                                 if (steep)
 252                                                         pool+=cooker.cook(tmp_surface[y0][x0]);
 253                                                 else
 254                                                         pool+=cooker.cook(tmp_surface[x0][y0]);
 255                                                 poolsize+=1;
 256                                         }
 257                                 } else
 258                                         printf("%s:%d unexpected %d >= %d or %d >= %d?\n", __FILE__, __LINE__, x0, w, y0, h);
 259
 260                                 while (e >= 0)
 261                                 {
 262                                         y0 += sy;
 263                                         e -= (dx << 1);
 264                                 }
 265                                 x0 += sx;
 266                                 e += (dy << 1);
 267                         }
 268                         if(poolsize)
 269                         {
 270                                 pool/=poolsize;
 271                                 apen.put_value(cooker.uncook(pool));
 272                         }
 273 /*
 274                         Point begin,end;
 275                         begin=pos;
 276                         end=(pos-origin)*(1.0f-size)+origin;
 277
 278                         Color pool(Color::alpha());
 279                         float f,poolsize(0);
 280                         int i;
 281                         int steps(steps*size);
 282                         for(f=0,i=0;i<steps;i++,f+=1.0f/(steps-1))
 283                         {
 284                                 Point loc((end-begin)*f+begin-tl);
 285                                 loc[0]/=pw;loc[1]/=ph;
 286
 287                                 if(fade_out)
 288                                         pool+=tmp_surface.linear_sample(loc[0],loc[1])*(i-steps),poolsize+=(i-steps);
 289                                 else
 290                                         pool+=tmp_surface.linear_sample(loc[0],loc[1]),poolsize+=1;
 291                         }
 292                         pool/=poolsize;
 293                         apen.put_value(pool);
 294 */
 295                 }
 296
 297
 298         if(cb && !cb->amount_complete(10000,10000)) return false;
 299
 300 // #define DRAW_TILE_OUTLINES
 301 #ifdef DRAW_TILE_OUTLINES
 302         // draw red lines to show tiles
 303         {
 304                 int x, y;
 305                 if (w != 0 && h != 0) {
 306                         Surface::alpha_pen apen(surface->begin());
 307                         apen.set_alpha(get_amount());
 308                         apen.set_blend_method(get_blend_method());
 309                         apen.set_value(Color(1, 0, 0, .1));
 310                         for (x = 0; x < w; x++) { apen.put_value(); apen.inc_x(); } apen.dec_x(w);
 311                         for (y = 0; y < h; y++) { apen.put_value(); apen.inc_y(); } apen.dec_y(h);
 312                 }
 313         }
 314 #endif // DRAW_TILE_OUTLINES
 315
 316         return true;
 317 }