synfig-core/tags/0.61.08/src/modules/mod_filter/halftone2.cpp

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file halftone2.cpp
   3 **      \brief Implementation of the "Halftone 2" layer
   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 /* ========================================================================= */
  23
  24 /* === H E A D E R S ======================================================= */
  25
  26 #ifdef USING_PCH
  27 #       include "pch.h"
  28 #else
  29 #ifdef HAVE_CONFIG_H
  30 #       include <config.h>
  31 #endif
  32
  33 #include "halftone2.h"
  34 #include "halftone.h"
  35
  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
  45 #endif
  46
  47 /* === M A C R O S ========================================================= */
  48
  49 using namespace synfig;
  50 using namespace std;
  51 using namespace etl;
  52
  53 /* === G L O B A L S ======================================================= */
  54
  55 SYNFIG_LAYER_INIT(Halftone2);
  56 SYNFIG_LAYER_SET_NAME(Halftone2,"halftone2");
  57 SYNFIG_LAYER_SET_LOCAL_NAME(Halftone2,N_("Halftone 2"));
  58 SYNFIG_LAYER_SET_CATEGORY(Halftone2,N_("Filters"));
  59 SYNFIG_LAYER_SET_VERSION(Halftone2,"0.0");
  60 SYNFIG_LAYER_SET_CVS_ID(Halftone2,"$Id$");
  61
  62 /* === P R O C E D U R E S ================================================= */
  63
  64 /* === M E T H O D S ======================================================= */
  65
  66 Halftone2::Halftone2():
  67         color_dark(Color::black()),
  68         color_light(Color::white())
  69 {
  70         halftone.offset=(synfig::Point(0,0));
  71         halftone.size=(synfig::Vector(0.25,0.25));
  72         halftone.angle=(Angle::zero());
  73         halftone.type=TYPE_SYMMETRIC;
  74
  75         set_blend_method(Color::BLEND_STRAIGHT);
  76 }
  77
  78 inline Color
  79 Halftone2::color_func(const Point &point, float supersample,const Color& color)const
  80 {
  81         const float amount(halftone(point,color.get_y(),supersample));
  82         Color halfcolor;
  83
  84         if(amount<=0.0f)
  85                 halfcolor=color_dark;
  86         else if(amount>=1.0f)
  87                 halfcolor=color_light;
  88         else
  89                 halfcolor=Color::blend(color_light,color_dark,amount,Color::BLEND_STRAIGHT);
  90
  91         halfcolor.set_a(color.get_a());
  92
  93         return halfcolor;
  94 }
  95
  96 inline float
  97 Halftone2::calc_supersample(const synfig::Point &/*x*/, float pw,float /*ph*/)const
  98 {
  99         return abs(pw/(halftone.size).mag());
 100 }
 101
 102 synfig::Layer::Handle
 103 Halftone2::hit_check(synfig::Context /*context*/, const synfig::Point &/*point*/)const
 104 {
 105         return const_cast<Halftone2*>(this);
 106 }
 107
 108 bool
 109 Halftone2::set_param(const String & param, const ValueBase &value)
 110 {
 111         IMPORT(color_dark);
 112         IMPORT(color_light);
 113
 114         IMPORT_AS(halftone.size,"size");
 115         IMPORT_AS(halftone.type,"type");
 116         IMPORT_AS(halftone.angle,"angle");
 117         IMPORT_AS(halftone.offset,"offset");
 118
 119         return Layer_Composite::set_param(param,value);
 120 }
 121
 122 ValueBase
 123 Halftone2::get_param(const String & param)const
 124 {
 125         EXPORT_AS(halftone.size,"size");
 126         EXPORT_AS(halftone.type,"type");
 127         EXPORT_AS(halftone.angle,"angle");
 128         EXPORT_AS(halftone.offset,"offset");
 129
 130         EXPORT(color_dark);
 131         EXPORT(color_light);
 132
 133         EXPORT_NAME();
 134         EXPORT_VERSION();
 135
 136         return Layer_Composite::get_param(param);
 137 }
 138
 139 Layer::Vocab
 140 Halftone2::get_param_vocab()const
 141 {
 142         Layer::Vocab ret(Layer_Composite::get_param_vocab());
 143
 144         ret.push_back(ParamDesc("offset")
 145                 .set_local_name(_("Mask Offset"))
 146                 .set_is_distance()
 147         );
 148         ret.push_back(ParamDesc("angle")
 149                 .set_local_name(_("Mask Angle"))
 150                 .set_origin("offset")
 151         );
 152         ret.push_back(ParamDesc("size")
 153                 .set_local_name(_("Mask Size"))
 154                 .set_is_distance()
 155                 .set_origin("offset")
 156         );
 157         ret.push_back(ParamDesc("color_light")
 158                 .set_local_name(_("Light Color"))
 159         );
 160         ret.push_back(ParamDesc("color_dark")
 161                 .set_local_name(_("Dark Color"))
 162         );
 163         ret.push_back(ParamDesc("type")
 164                 .set_local_name(_("Type"))
 165                 .set_hint("enum")
 166                 .add_enum_value(TYPE_SYMMETRIC,"symmetric",_("Symmetric"))
 167                 .add_enum_value(TYPE_LIGHTONDARK,"lightondark",_("Light On Dark"))
 168                 //.add_enum_value(TYPE_DARKONLIGHT,"darkonlight",_("Dark on Light"))
 169                 .add_enum_value(TYPE_DIAMOND,"diamond",_("Diamond"))
 170                 .add_enum_value(TYPE_STRIPE,"stripe",_("Stripe"))
 171         );
 172
 173         return ret;
 174 }
 175
 176 Color
 177 Halftone2::get_color(Context context, const Point &point)const
 178 {
 179         const Color undercolor(context.get_color(point));
 180         const Color color(color_func(point,0,undercolor));
 181
 182         if(get_amount()==1.0 && get_blend_method()==Color::BLEND_STRAIGHT)
 183                 return color;
 184         else
 185                 return Color::blend(color,undercolor,get_amount(),get_blend_method());
 186 }
 187
 188 bool
 189 Halftone2::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
 190 {
 191         SuperCallback supercb(cb,0,9500,10000);
 192
 193         if(!context.accelerated_render(surface,quality,renddesc,&supercb))
 194                 return false;
 195         if(get_amount()==0)
 196                 return true;
 197
 198         const Real pw(renddesc.get_pw()),ph(renddesc.get_ph());
 199         const Point tl(renddesc.get_tl());
 200         const int w(surface->get_w());
 201         const int h(surface->get_h());
 202         const float supersample_size(abs(pw/(halftone.size).mag()));
 203
 204         Surface::pen pen(surface->begin());
 205         Point pos;
 206         int x,y;
 207
 208         if(is_solid_color())
 209         {
 210                 for(y=0,pos[1]=tl[1];y<h;y++,pen.inc_y(),pen.dec_x(x),pos[1]+=ph)
 211                         for(x=0,pos[0]=tl[0];x<w;x++,pen.inc_x(),pos[0]+=pw)
 212                                 pen.put_value(
 213                                         color_func(
 214                                                 pos,
 215                                                 supersample_size,
 216                                                 pen.get_value()
 217                                         )
 218                                 );
 219         }
 220         else
 221         {
 222                 for(y=0,pos[1]=tl[1];y<h;y++,pen.inc_y(),pen.dec_x(x),pos[1]+=ph)
 223                         for(x=0,pos[0]=tl[0];x<w;x++,pen.inc_x(),pos[0]+=pw)
 224                                 pen.put_value(
 225                                         Color::blend(
 226                                                 color_func(
 227                                                         pos,
 228                                                         supersample_size,
 229                                                         pen.get_value()
 230                                                 ),
 231                                                 pen.get_value(),
 232                                                 get_amount(),
 233                                                 get_blend_method()
 234                                         )
 235                                 );
 236         }
 237
 238         // Mark our progress as finished
 239         if(cb && !cb->amount_complete(10000,10000))
 240                 return false;
 241
 242         return true;
 243 }