synfig-core/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) 2007-2008 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.origin=(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         Layer::Vocab voc(get_param_vocab());
  78         Layer::fill_static(voc);
  79 }
  80
  81 inline Color
  82 Halftone2::color_func(const Point &point, float supersample,const Color& color)const
  83 {
  84         const float amount(halftone(point,color.get_y(),supersample));
  85         Color halfcolor;
  86
  87         if(amount<=0.0f)
  88                 halfcolor=color_dark;
  89         else if(amount>=1.0f)
  90                 halfcolor=color_light;
  91         else
  92                 halfcolor=Color::blend(color_light,color_dark,amount,Color::BLEND_STRAIGHT);
  93
  94         halfcolor.set_a(color.get_a());
  95
  96         return halfcolor;
  97 }
  98
  99 inline float
 100 Halftone2::calc_supersample(const synfig::Point &/*x*/, float pw,float /*ph*/)const
 101 {
 102         return abs(pw/(halftone.size).mag());
 103 }
 104
 105 synfig::Layer::Handle
 106 Halftone2::hit_check(synfig::Context /*context*/, const synfig::Point &/*point*/)const
 107 {
 108         return const_cast<Halftone2*>(this);
 109 }
 110
 111 bool
 112 Halftone2::set_param(const String & param, const ValueBase &value)
 113 {
 114         IMPORT(color_dark);
 115         IMPORT(color_light);
 116
 117         IMPORT_AS(halftone.size,"size");
 118         IMPORT_AS(halftone.type,"type");
 119         IMPORT_AS(halftone.angle,"angle");
 120         IMPORT_AS(halftone.origin,"origin");
 121
 122         IMPORT_AS(halftone.origin,"offset");
 123
 124         return Layer_Composite::set_param(param,value);
 125 }
 126
 127 ValueBase
 128 Halftone2::get_param(const String & param)const
 129 {
 130         EXPORT_AS(halftone.size,"size");
 131         EXPORT_AS(halftone.type,"type");
 132         EXPORT_AS(halftone.angle,"angle");
 133         EXPORT_AS(halftone.origin,"origin");
 134
 135         EXPORT(color_dark);
 136         EXPORT(color_light);
 137
 138         EXPORT_NAME();
 139         EXPORT_VERSION();
 140
 141         return Layer_Composite::get_param(param);
 142 }
 143
 144 Layer::Vocab
 145 Halftone2::get_param_vocab()const
 146 {
 147         Layer::Vocab ret(Layer_Composite::get_param_vocab());
 148
 149         ret.push_back(ParamDesc("origin")
 150                 .set_local_name(_("Mask Origin"))
 151                 .set_is_distance()
 152         );
 153         ret.push_back(ParamDesc("angle")
 154                 .set_local_name(_("Mask Angle"))
 155                 .set_origin("origin")
 156         );
 157         ret.push_back(ParamDesc("size")
 158                 .set_local_name(_("Mask Size"))
 159                 .set_is_distance()
 160                 .set_origin("origin")
 161         );
 162         ret.push_back(ParamDesc("color_light")
 163                 .set_local_name(_("Light Color"))
 164         );
 165         ret.push_back(ParamDesc("color_dark")
 166                 .set_local_name(_("Dark Color"))
 167         );
 168         ret.push_back(ParamDesc("type")
 169                 .set_local_name(_("Type"))
 170                 .set_hint("enum")
 171                 .add_enum_value(TYPE_SYMMETRIC,"symmetric",_("Symmetric"))
 172                 .add_enum_value(TYPE_LIGHTONDARK,"lightondark",_("Light On Dark"))
 173                 //.add_enum_value(TYPE_DARKONLIGHT,"darkonlight",_("Dark on Light"))
 174                 .add_enum_value(TYPE_DIAMOND,"diamond",_("Diamond"))
 175                 .add_enum_value(TYPE_STRIPE,"stripe",_("Stripe"))
 176         );
 177
 178         return ret;
 179 }
 180
 181 Color
 182 Halftone2::get_color(Context context, const Point &point)const
 183 {
 184         const Color undercolor(context.get_color(point));
 185         const Color color(color_func(point,0,undercolor));
 186
 187         if(get_amount()==1.0 && get_blend_method()==Color::BLEND_STRAIGHT)
 188                 return color;
 189         else
 190                 return Color::blend(color,undercolor,get_amount(),get_blend_method());
 191 }
 192
 193 bool
 194 Halftone2::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
 195 {
 196         SuperCallback supercb(cb,0,9500,10000);
 197
 198         if(!context.accelerated_render(surface,quality,renddesc,&supercb))
 199                 return false;
 200         if(get_amount()==0)
 201                 return true;
 202
 203         const Real pw(renddesc.get_pw()),ph(renddesc.get_ph());
 204         const Point tl(renddesc.get_tl());
 205         const int w(surface->get_w());
 206         const int h(surface->get_h());
 207         const float supersample_size(abs(pw/(halftone.size).mag()));
 208
 209         Surface::pen pen(surface->begin());
 210         Point pos;
 211         int x,y;
 212
 213         if(is_solid_color())
 214         {
 215                 for(y=0,pos[1]=tl[1];y<h;y++,pen.inc_y(),pen.dec_x(x),pos[1]+=ph)
 216                         for(x=0,pos[0]=tl[0];x<w;x++,pen.inc_x(),pos[0]+=pw)
 217                                 pen.put_value(
 218                                         color_func(
 219                                                 pos,
 220                                                 supersample_size,
 221                                                 pen.get_value()
 222                                         )
 223                                 );
 224         }
 225         else
 226         {
 227                 for(y=0,pos[1]=tl[1];y<h;y++,pen.inc_y(),pen.dec_x(x),pos[1]+=ph)
 228                         for(x=0,pos[0]=tl[0];x<w;x++,pen.inc_x(),pos[0]+=pw)
 229                                 pen.put_value(
 230                                         Color::blend(
 231                                                 color_func(
 232                                                         pos,
 233                                                         supersample_size,
 234                                                         pen.get_value()
 235                                                 ),
 236                                                 pen.get_value(),
 237                                                 get_amount(),
 238                                                 get_blend_method()
 239                                         )
 240                                 );
 241         }
 242
 243         // Mark our progress as finished
 244         if(cb && !cb->amount_complete(10000,10000))
 245                 return false;
 246
 247         return true;
 248 }