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

   1 /* === S I N F G =========================================================== */
   2 /*!     \file blur.cpp
   3 **      \brief Template Header
   4 **
   5 **      $Id: blur.cpp,v 1.2 2005/01/24 03:08:17 darco Exp $
   6 **
   7 **      \legal
   8 **      Copyright (c) 2002 Robert B. Quattlebaum Jr.
   9 **
  10 **      This software and associated documentation
  11 **      are CONFIDENTIAL and PROPRIETARY property of
  12 **      the above-mentioned copyright holder.
  13 **
  14 **      You may not copy, print, publish, or in any
  15 **      other way distribute this software without
  16 **      a prior written agreement with
  17 **      the copyright holder.
  18 **      \endlegal
  19 */
  20 /* ========================================================================= */
  21
  22 /* === H E A D E R S ======================================================= */
  23
  24 #ifdef USING_PCH
  25 #       include "pch.h"
  26 #else
  27 #ifdef HAVE_CONFIG_H
  28 #       include <config.h>
  29 #endif
  30
  31 #include "blur.h"
  32
  33 #include <sinfg/string.h>
  34 #include <sinfg/time.h>
  35 #include <sinfg/context.h>
  36 #include <sinfg/paramdesc.h>
  37 #include <sinfg/renddesc.h>
  38 #include <sinfg/surface.h>
  39 #include <sinfg/value.h>
  40 #include <sinfg/valuenode.h>
  41 #include <sinfg/segment.h>
  42
  43 #include <cstring>
  44 #include <ETL/pen>
  45
  46 #endif
  47
  48 using namespace sinfg;
  49 using namespace etl;
  50 using namespace std;
  51
  52 /*#define TYPE_BOX                      0
  53 #define TYPE_FASTGUASSIAN       1
  54 #define TYPE_FASTGAUSSIAN       1
  55 #define TYPE_CROSS                      2
  56 #define TYPE_GUASSIAN           3
  57 #define TYPE_GAUSSIAN           3
  58 #define TYPE_DISC                       4
  59 */
  60
  61 /* -- G L O B A L S --------------------------------------------------------- */
  62
  63 SINFG_LAYER_INIT(Blur_Layer);
  64 SINFG_LAYER_SET_NAME(Blur_Layer,"blur");
  65 SINFG_LAYER_SET_LOCAL_NAME(Blur_Layer,_("Blur"));
  66 SINFG_LAYER_SET_CATEGORY(Blur_Layer,_("Blurs"));
  67 SINFG_LAYER_SET_VERSION(Blur_Layer,"0.2");
  68 SINFG_LAYER_SET_CVS_ID(Blur_Layer,"$Id: blur.cpp,v 1.2 2005/01/24 03:08:17 darco Exp $");
  69
  70 /* -- F U N C T I O N S ----------------------------------------------------- */
  71
  72 inline void clamp(sinfg::Vector &v)
  73 {
  74         if(v[0]<0.0)v[0]=0.0;
  75         if(v[1]<0.0)v[1]=0.0;
  76 }
  77
  78 Blur_Layer::Blur_Layer():
  79         Layer_Composite (1.0,Color::BLEND_STRAIGHT),
  80         size(0.1,0.1),
  81         type(Blur::FASTGAUSSIAN)
  82 {
  83 }
  84
  85 bool
  86 Blur_Layer::set_param(const String &param, const ValueBase &value)
  87 {
  88         IMPORT_PLUS(size,clamp(size));
  89         IMPORT(type);
  90
  91         return Layer_Composite::set_param(param,value);
  92 }
  93
  94 ValueBase
  95 Blur_Layer::get_param(const String &param)const
  96 {
  97         EXPORT(size);
  98         EXPORT(type);
  99
 100         EXPORT_NAME();
 101         EXPORT_VERSION();
 102
 103         return Layer_Composite::get_param(param);
 104 }
 105
 106 Color
 107 Blur_Layer::get_color(Context context, const Point &pos)const
 108 {
 109         Point blurpos = Blur(size,type)(pos);
 110
 111         if(get_amount()==1.0 && get_blend_method()==Color::BLEND_STRAIGHT)
 112                 return context.get_color(blurpos);
 113
 114         if(get_amount()==0.0)
 115                 return context.get_color(pos);
 116
 117         return Color::blend(context.get_color(blurpos),context.get_color(pos),get_amount(),get_blend_method());
 118 }
 119
 120 bool
 121 Blur_Layer::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
 122 {
 123         int x,y;
 124         SuperCallback stageone(cb,0,5000,10000);
 125         SuperCallback stagetwo(cb,5000,10000,10000);
 126
 127         const int       w = renddesc.get_w(),
 128                                 h = renddesc.get_h();
 129         const Real      pw = renddesc.get_pw(),
 130                                 ph = renddesc.get_ph();
 131
 132         RendDesc        workdesc(renddesc);
 133         Surface         worksurface,blurred;
 134
 135         //callbacks depend on how long the blur takes
 136         if(size[0] || size[1])
 137         {
 138                 if(type == Blur::DISC)
 139                 {
 140                         stageone = SuperCallback(cb,0,5000,10000);
 141                         stagetwo = SuperCallback(cb,5000,10000,10000);
 142                 }
 143                 else
 144                 {
 145                         stageone = SuperCallback(cb,0,9000,10000);
 146                         stagetwo = SuperCallback(cb,9000,10000,10000);
 147                 }
 148         }
 149         else
 150         {
 151                 stageone = SuperCallback(cb,0,9999,10000);
 152                 stagetwo = SuperCallback(cb,9999,10000,10000);
 153         }
 154
 155         //expand the working surface to accommodate the blur
 156
 157         //the expanded size = 1/2 the size in each direction rounded up
 158         int     halfsizex = (int) (abs(size[0]*.5/pw) + 3),
 159                 halfsizey = (int) (abs(size[1]*.5/ph) + 3);
 160
 161         //expand by 1/2 size in each direction on either side
 162         switch(type)
 163         {
 164                 case Blur::DISC:
 165                 case Blur::BOX:
 166                 case Blur::CROSS:
 167                 {
 168                         workdesc.set_subwindow(-max(1,halfsizex),-max(1,halfsizey),w+2*max(1,halfsizex),h+2*max(1,halfsizey));
 169                         break;
 170                 }
 171                 case Blur::FASTGAUSSIAN:
 172                 {
 173                         if(quality < 4)
 174                         {
 175                                 halfsizex*=2;
 176                                 halfsizey*=2;
 177                         }
 178                         workdesc.set_subwindow(-max(1,halfsizex),-max(1,halfsizey),w+2*max(1,halfsizex),h+2*max(1,halfsizey));
 179                         break;
 180                 }
 181                 case Blur::GAUSSIAN:
 182                 {
 183                 #define GAUSSIAN_ADJUSTMENT             (0.05)
 184                         Real    pw = (Real)workdesc.get_w()/(workdesc.get_br()[0]-workdesc.get_tl()[0]);
 185                         Real    ph = (Real)workdesc.get_h()/(workdesc.get_br()[1]-workdesc.get_tl()[1]);
 186
 187                         pw=pw*pw;
 188                         ph=ph*ph;
 189
 190                         halfsizex = (int)(abs(pw)*size[0]*GAUSSIAN_ADJUSTMENT+0.5);
 191                         halfsizey = (int)(abs(ph)*size[1]*GAUSSIAN_ADJUSTMENT+0.5);
 192
 193                         halfsizex = (halfsizex + 1)/2;
 194                         halfsizey = (halfsizey + 1)/2;
 195                         workdesc.set_subwindow( -halfsizex, -halfsizey, w+2*halfsizex, h+2*halfsizey );
 196
 197                         break;
 198                 }
 199         }
 200
 201         //render the background onto the expanded surface
 202         if(!context.accelerated_render(&worksurface,quality,workdesc,&stageone))
 203                 return false;
 204
 205         //blur the image
 206         Blur(size,type,&stagetwo)(worksurface,workdesc.get_br()-workdesc.get_tl(),blurred);
 207
 208         //be sure the surface is of the correct size
 209         surface->set_wh(renddesc.get_w(),renddesc.get_h());
 210
 211         {
 212                 Surface::pen pen(surface->begin());
 213                 worksurface.blit_to(pen,halfsizex,halfsizey,renddesc.get_w(),renddesc.get_h());
 214         }
 215         {
 216                 Surface::alpha_pen pen(surface->begin());
 217                 pen.set_alpha(get_amount());
 218                 pen.set_blend_method(get_blend_method());
 219                 blurred.blit_to(pen,halfsizex,halfsizey,renddesc.get_w(),renddesc.get_h());
 220         }
 221         if(cb && !cb->amount_complete(10000,10000))
 222         {
 223                 //if(cb)cb->error(strprintf(__FILE__"%d: Accelerated Renderer Failure",__LINE__));
 224                 return false;
 225         }
 226
 227         return true;
 228 }
 229
 230 Layer::Vocab
 231 Blur_Layer::get_param_vocab(void)const
 232 {
 233         Layer::Vocab ret(Layer_Composite::get_param_vocab());
 234
 235         ret.push_back(ParamDesc("size")
 236                 .set_local_name(_("Size"))
 237                 .set_description(_("Size of Blur"))
 238         );
 239         ret.push_back(ParamDesc("type")
 240                 .set_local_name(_("Type"))
 241                 .set_description(_("Type of blur to use"))
 242                 .set_hint("enum")
 243                 .add_enum_value(Blur::BOX,"box",_("Box Blur"))
 244                 .add_enum_value(Blur::FASTGAUSSIAN,"fastgaussian",_("Fast Gaussian Blur"))
 245                 .add_enum_value(Blur::CROSS,"cross",_("Cross-Hatch Blur"))
 246                 .add_enum_value(Blur::GAUSSIAN,"gaussian",_("Gaussian Blur"))
 247                 .add_enum_value(Blur::DISC,"disc",_("Disc Blur"))
 248         );
 249
 250         return ret;
 251 }
 252
 253 Rect
 254 Blur_Layer::get_full_bounding_rect(Context context)const
 255 {
 256         if(is_disabled() || Color::is_onto(get_blend_method()))
 257                 return context.get_full_bounding_rect();
 258
 259         Rect bounds(context.get_full_bounding_rect().expand_x(size[0]).expand_y(size[1]));
 260
 261         return bounds;
 262 }