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 **      $Id$
   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         const Point tl(renddesc.get_tl()), br(renddesc.get_br());
 137         const int w(renddesc.get_w()), h(renddesc.get_h());
 138         const Real pw(renddesc.get_pw()),ph(renddesc.get_ph());
 139
 140         Rect rect(tl, br);
 141         Point pos;
 142
 143         // find how far towards the origin of the blur we are going to
 144         // wander for each of the 4 corners of our tile, expanding the
 145         // render description for each of them if necessary
 146         int x, y;
 147         for(y=0,pos[1]=tl[1];y<h;y+=(h-1),pos[1]+=ph*(h-1))
 148                 for(x=0,pos[0]=tl[0];x<w;x+=(w-1),pos[0]+=pw*(w-1))
 149                         rect.expand((pos-origin)*(1.0f-size) + origin);
 150
 151         // round out to the nearest pixel
 152         Point tmp_surface_tl = Point(tl[0] - pw*(int((tl[0]-rect.get_min()[0])/pw+1-1e-6)),
 153                                                                  tl[1] - ph*(int((tl[1]-rect.get_max()[1])/ph+1-1e-6)));
 154         Point tmp_surface_br = Point(br[0] + pw*(int((rect.get_max()[0]-br[0])/pw+2-1e-6)),
 155                                                                  br[1] + ph*(int((rect.get_min()[1]-br[1])/ph+2-1e-6)));
 156
 157         // round to nearest integer width and height (should be very
 158         // nearly whole numbers already, but dont want to round 5.99999
 159         // down to 5)
 160         int tmp_surface_width = int((tmp_surface_br[0]-tmp_surface_tl[0])/pw + 0.5);
 161         int tmp_surface_height = int((tmp_surface_br[1]-tmp_surface_tl[1])/ph + 0.5);
 162
 163         RendDesc desc(renddesc);
 164         desc.clear_flags();
 165         desc.set_wh(tmp_surface_width,tmp_surface_height);
 166         desc.set_tl(tmp_surface_tl);
 167         desc.set_br(tmp_surface_br);
 168
 169         // render the layers beneath us
 170         if(!context.accelerated_render(&tmp_surface,quality,desc,cb))
 171                 return false;
 172
 173         // copy the part of the layers beneath us that corresponds to this tile
 174         surface->set_wh(w, h);
 175         Surface::pen pen(surface->get_pen(0, 0));
 176         tmp_surface.blit_to(pen,
 177                                                 int((tl[0] - tmp_surface_tl[0])/pw + 0.5),
 178                                                 int((tl[1] - tmp_surface_tl[1])/ph + 0.5),
 179                                                 w, h);
 180
 181         Surface::alpha_pen apen(surface->begin());
 182
 183         apen.set_alpha(get_amount());
 184         apen.set_blend_method(get_blend_method());
 185
 186 /*
 187         int steps(5);
 188
 189         if(quality>=9)steps=20;
 190         else if(quality>=5)steps=30;
 191         else if(quality>=4)steps=60;
 192         else if(quality>=3)steps=100;
 193         else steps=120;
 194 */
 195
 196         Surface::value_prep_type cooker;
 197
 198         // loop through the pixels
 199         for(y=0,pos[1]=tl[1];y<h;y++,apen.inc_y(),apen.dec_x(x),pos[1]+=ph)
 200                 for(x=0,pos[0]=tl[0];x<w;x++,apen.inc_x(),pos[0]+=pw)
 201                 {
 202                         Point
 203                                 begin(pos-tmp_surface_tl),
 204                                 end((pos-origin)*(1.0f-size) + origin-tmp_surface_tl);
 205                         begin[0]/=pw;begin[1]/=ph;
 206                         end[0]/=pw;end[1]/=ph;
 207
 208                         Color pool(Color::alpha());
 209                         int poolsize(0);
 210
 211                         int x0(round_to_int(begin[0])),
 212                                 y0(round_to_int(begin[1])),
 213                                 x1(round_to_int(end[0])),
 214                                 y1(round_to_int(end[1]));
 215
 216                         int i;
 217                         int steep = 1;
 218                         int sx, sy;  /* step positive or negative (1 or -1) */
 219                         int dx, dy;  /* delta (difference in X and Y between points) */
 220                         int e;
 221                         int w(tmp_surface_width), h(tmp_surface_height);
 222
 223                         dx = abs(x1 - x0);
 224                         sx = ((x1 - x0) > 0) ? 1 : -1;
 225                         dy = abs(y1 - y0);
 226                         sy = ((y1 - y0) > 0) ? 1 : -1;
 227                         if (dy > dx)
 228                         {
 229                                 steep = 0;
 230                                 swap(x0, y0);
 231                                 swap(dx, dy);
 232                                 swap(sx, sy);
 233                                 swap(w,h);
 234                         }
 235                         e = (dy << 1) - dx;
 236                         for (i = 0; i < dx; i++)
 237                         {
 238                                 if(y0>=0 && x0>=0 && y0<h && x0<w)
 239                                 {
 240                                         if(fade_out)
 241                                         {
 242                                                 if (steep)
 243                                                         pool+=cooker.cook(tmp_surface[y0][x0])*(i-dx);
 244                                                 else
 245                                                         pool+=cooker.cook(tmp_surface[x0][y0])*(i-dx);
 246                                                 poolsize+=(i-dx);
 247                                         }
 248                                         else
 249                                         {
 250                                                 if (steep)
 251                                                         pool+=cooker.cook(tmp_surface[y0][x0]);
 252                                                 else
 253                                                         pool+=cooker.cook(tmp_surface[x0][y0]);
 254                                                 poolsize+=1;
 255                                         }
 256                                 } else
 257                                         printf("%s:%d unexpected %d >= %d or %d >= %d?\n", __FILE__, __LINE__, x0, w, y0, h);
 258
 259                                 while (e >= 0)
 260                                 {
 261                                         y0 += sy;
 262                                         e -= (dx << 1);
 263                                 }
 264                                 x0 += sx;
 265                                 e += (dy << 1);
 266                         }
 267                         if(poolsize)
 268                         {
 269                                 pool/=poolsize;
 270                                 apen.put_value(cooker.uncook(pool));
 271                         }
 272 /*
 273                         Point begin,end;
 274                         begin=pos;
 275                         end=(pos-origin)*(1.0f-size)+origin;
 276
 277                         Color pool(Color::alpha());
 278                         float f,poolsize(0);
 279                         int i;
 280                         int steps(steps*size);
 281                         for(f=0,i=0;i<steps;i++,f+=1.0f/(steps-1))
 282                         {
 283                                 Point loc((end-begin)*f+begin-tl);
 284                                 loc[0]/=pw;loc[1]/=ph;
 285
 286                                 if(fade_out)
 287                                         pool+=tmp_surface.linear_sample(loc[0],loc[1])*(i-steps),poolsize+=(i-steps);
 288                                 else
 289                                         pool+=tmp_surface.linear_sample(loc[0],loc[1]),poolsize+=1;
 290                         }
 291                         pool/=poolsize;
 292                         apen.put_value(pool);
 293 */
 294                 }
 295
 296
 297         if(cb && !cb->amount_complete(10000,10000)) return false;
 298
 299 // #define DRAW_TILE_OUTLINES
 300 #ifdef DRAW_TILE_OUTLINES
 301         // draw red lines to show tiles
 302         {
 303                 int x, y;
 304                 if (w != 0 && h != 0) {
 305                         Surface::alpha_pen apen(surface->begin());
 306                         apen.set_alpha(get_amount());
 307                         apen.set_blend_method(get_blend_method());
 308                         apen.set_value(Color(1, 0, 0, .1));
 309                         for (x = 0; x < w; x++) { apen.put_value(); apen.inc_x(); } apen.dec_x(w);
 310                         for (y = 0; y < h; y++) { apen.put_value(); apen.inc_y(); } apen.dec_y(h);
 311                 }
 312         }
 313 #endif // DRAW_TILE_OUTLINES
 314
 315         return true;
 316 }