synfig-core/src/modules/lyr_std/rotate.cpp

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file rotate.cpp
   3 **      \brief Implementation of the "Rotate" layer
   4 **
   5 **      $Id$
   6 **
   7 **      \legal
   8 **      Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
   9 **      Copyright (c) 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 ** === 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 "rotate.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(Rotate);
  54 SYNFIG_LAYER_SET_NAME(Rotate,"rotate");
  55 SYNFIG_LAYER_SET_LOCAL_NAME(Rotate,N_("Rotate"));
  56 SYNFIG_LAYER_SET_CATEGORY(Rotate,N_("Transform"));
  57 SYNFIG_LAYER_SET_VERSION(Rotate,"0.1");
  58 SYNFIG_LAYER_SET_CVS_ID(Rotate,"$Id$");
  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 Rotate::Rotate():
  67         origin  (0,0),
  68         amount  (Angle::deg(0)),
  69         sin_val (0),
  70         cos_val (1)
  71 {
  72         Layer::Vocab voc(get_param_vocab());
  73         Layer::fill_static(voc);
  74 }
  75
  76 Rotate::~Rotate()
  77 {
  78 }
  79
  80 bool
  81 Rotate::set_param(const String & param, const ValueBase &value)
  82 {
  83         IMPORT(origin);
  84
  85         if(param=="amount" && value.same_type_as(amount))
  86         {
  87                 amount=value.get(amount);
  88                 sin_val=Angle::sin(amount).get();
  89                 cos_val=Angle::cos(amount).get();
  90                 set_param_static(param, value.get_static());
  91                 return true;
  92         }
  93
  94         return false;
  95 }
  96
  97 ValueBase
  98 Rotate::get_param(const String &param)const
  99 {
 100         EXPORT(origin);
 101         EXPORT(amount);
 102
 103         EXPORT_NAME();
 104         EXPORT_VERSION();
 105
 106         return ValueBase();
 107 }
 108
 109 Layer::Vocab
 110 Rotate::get_param_vocab()const
 111 {
 112         Layer::Vocab ret;
 113
 114         ret.push_back(ParamDesc("origin")
 115                 .set_local_name(_("Origin"))
 116                 .set_description(_("Point where you want the origin to be"))
 117         );
 118
 119         ret.push_back(ParamDesc("amount")
 120                 .set_local_name(_("Amount"))
 121                 .set_description(_("Amount of rotation"))
 122                 .set_origin("origin")
 123         );
 124
 125         return ret;
 126 }
 127
 128 class Rotate_Trans : public Transform
 129 {
 130         etl::handle<const Rotate> layer;
 131 public:
 132         Rotate_Trans(const Rotate* x):Transform(x->get_guid()),layer(x) { }
 133
 134         synfig::Vector perform(const synfig::Vector& x)const
 135         {
 136                 Point pos(x-layer->origin);
 137                 return Point(layer->cos_val*pos[0]-layer->sin_val*pos[1],layer->sin_val*pos[0]+layer->cos_val*pos[1])+layer->origin;
 138         }
 139
 140         synfig::Vector unperform(const synfig::Vector& x)const
 141         {
 142                 Point pos(x-layer->origin);
 143                 return Point(layer->cos_val*pos[0]+layer->sin_val*pos[1],-layer->sin_val*pos[0]+layer->cos_val*pos[1])+layer->origin;
 144         }
 145 };
 146 etl::handle<Transform>
 147 Rotate::get_transform()const
 148 {
 149         return new Rotate_Trans(this);
 150 }
 151
 152 synfig::Layer::Handle
 153 Rotate::hit_check(synfig::Context context, const synfig::Point &p)const
 154 {
 155         Point pos(p-origin);
 156         Point newpos(cos_val*pos[0]+sin_val*pos[1],-sin_val*pos[0]+cos_val*pos[1]);
 157         newpos+=origin;
 158         return context.hit_check(newpos);
 159 }
 160
 161 Color
 162 Rotate::get_color(Context context, const Point &p)const
 163 {
 164         Point pos(p-origin);
 165         Point newpos(cos_val*pos[0]+sin_val*pos[1],-sin_val*pos[0]+cos_val*pos[1]);
 166         newpos+=origin;
 167         return context.get_color(newpos);
 168 }
 169
 170 bool
 171 Rotate::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
 172 {
 173         if(amount.dist(Angle::deg(0))==Angle::deg(0))
 174                 return context.accelerated_render(surface,quality,renddesc,cb);
 175         if(amount.dist(Angle::deg(180))==Angle::deg(0))
 176         {
 177                 RendDesc desc(renddesc);
 178                 desc.clear_flags();
 179                 Point tmp;
 180                 tmp=renddesc.get_tl()-origin;
 181                 desc.set_tl(Point(-tmp[0],-tmp[1])+origin);
 182                 tmp=renddesc.get_br()-origin;
 183                 desc.set_br(Point(-tmp[0],-tmp[1])+origin);
 184                 return context.accelerated_render(surface,quality,desc,cb);
 185         }
 186
 187         SuperCallback stageone(cb,0,9000,10000);
 188         SuperCallback stagetwo(cb,9000,10000,10000);
 189
 190         if(cb && !cb->amount_complete(0,10000))
 191                 return false;
 192
 193         Point tl(renddesc.get_tl()-origin);
 194         Point br(renddesc.get_br()-origin);
 195
 196         {
 197                 Point rot_tl(cos_val*tl[0]+sin_val*tl[1],-sin_val*tl[0]+cos_val*tl[1]);
 198                 Point rot_br(cos_val*br[0]+sin_val*br[1],-sin_val*br[0]+cos_val*br[1]);
 199                 Point rot_tr(cos_val*br[0]+sin_val*tl[1],-sin_val*br[0]+cos_val*tl[1]);
 200                 Point rot_bl(cos_val*tl[0]+sin_val*br[1],-sin_val*tl[0]+cos_val*br[1]);
 201                 rot_tl+=origin;
 202                 rot_br+=origin;
 203                 rot_tr+=origin;
 204                 rot_bl+=origin;
 205
 206                 Point min_point(min(min(min(rot_tl[0],rot_br[0]),rot_tr[0]),rot_bl[0]),min(min(min(rot_tl[1],rot_br[1]),rot_tr[1]),rot_bl[1]));
 207                 Point max_point(max(max(max(rot_tl[0],rot_br[0]),rot_tr[0]),rot_bl[0]),max(max(max(rot_tl[1],rot_br[1]),rot_tr[1]),rot_bl[1]));
 208
 209                 if(tl[0]>br[0])
 210                 {
 211                         tl[0]=max_point[0];
 212                         br[0]=min_point[0];
 213                 }
 214                 else
 215                 {
 216                         br[0]=max_point[0];
 217                         tl[0]=min_point[0];
 218                 }
 219                 if(tl[1]>br[1])
 220                 {
 221                         tl[1]=max_point[1];
 222                         br[1]=min_point[1];
 223                 }
 224                 else
 225                 {
 226                         br[1]=max_point[1];
 227                         tl[1]=min_point[1];
 228                 }
 229         }
 230
 231         Real pw=(renddesc.get_w())/(renddesc.get_br()[0]-renddesc.get_tl()[0]);
 232         Real ph=(renddesc.get_h())/(renddesc.get_br()[1]-renddesc.get_tl()[1]);
 233
 234         // we're going to round the canvas size to an integer number of pixels, so round the
 235         // tl-br rectangle accordingly - otherwise we see the jittering described in bug 2152666
 236         br[0] -= (pw*(br[0]-tl[0]) - round_to_int(pw*(br[0]-tl[0]))) / pw;
 237         br[1] -= (ph*(br[1]-tl[1]) - round_to_int(ph*(br[1]-tl[1]))) / ph;
 238
 239         RendDesc desc(renddesc);
 240         desc.clear_flags();
 241         //desc.set_flags(RendDesc::PX_ASPECT);
 242         desc.set_tl(tl);
 243         desc.set_br(br);
 244         desc.set_wh(round_to_int(pw*(br[0]-tl[0])),round_to_int(ph*(br[1]-tl[1])));
 245
 246         //synfig::warning("given window: [%f,%f]-[%f,%f] %dx%d",renddesc.get_tl()[0],renddesc.get_tl()[1],renddesc.get_br()[0],renddesc.get_br()[1],renddesc.get_w(),renddesc.get_h());
 247         //synfig::warning("surface to render: [%f,%f]-[%f,%f] %dx%d",desc.get_tl()[0],desc.get_tl()[1],desc.get_br()[0],desc.get_br()[1],desc.get_w(),desc.get_h());
 248
 249         Surface source;
 250         source.set_wh(desc.get_w(),desc.get_h());
 251
 252         if(!context.accelerated_render(&source,quality,desc,&stageone))
 253                 return false;
 254
 255         surface->set_wh(renddesc.get_w(),renddesc.get_h());
 256
 257         Surface::pen pen(surface->begin());
 258
 259         if(quality<=4)
 260         {
 261                 // CUBIC
 262                 int x,y;//,u,v,u2,v2;
 263                 Point point,tmp;
 264                 for(y=0,point[1]=renddesc.get_tl()[1];y<surface->get_h();y++,pen.inc_y(),pen.dec_x(x),point[1]+=1.0/ph)
 265                 {
 266                         for(x=0,point[0]=renddesc.get_tl()[0];x<surface->get_w();x++,pen.inc_x(),point[0]+=1.0/pw)
 267                         {
 268                                 tmp=Point(cos_val*(point[0]-origin[0])+sin_val*(point[1]-origin[1]),-sin_val*(point[0]-origin[0])+cos_val*(point[1]-origin[1])) +origin;
 269                                 (*surface)[y][x]=source.cubic_sample((tmp[0]-tl[0])*pw,(tmp[1]-tl[1])*ph);
 270                         }
 271                         if((y&31)==0 && cb)
 272                         {
 273                                 if(!stagetwo.amount_complete(y,surface->get_h()))
 274                                         return false;
 275                         }
 276                 }
 277         }
 278         else
 279         if(quality<=6)
 280         {
 281                 // INTERPOLATION_LINEAR
 282                 int x,y;//,u,v,u2,v2;
 283                 Point point,tmp;
 284                 for(y=0,point[1]=renddesc.get_tl()[1];y<surface->get_h();y++,pen.inc_y(),pen.dec_x(x),point[1]+=1.0/ph)
 285                 {
 286                         for(x=0,point[0]=renddesc.get_tl()[0];x<surface->get_w();x++,pen.inc_x(),point[0]+=1.0/pw)
 287                         {
 288                                 tmp=Point(cos_val*(point[0]-origin[0])+sin_val*(point[1]-origin[1]),-sin_val*(point[0]-origin[0])+cos_val*(point[1]-origin[1])) +origin;
 289                                 (*surface)[y][x]=source.linear_sample((tmp[0]-tl[0])*pw,(tmp[1]-tl[1])*ph);
 290                         }
 291                         if((y&31)==0 && cb)
 292                         {
 293                                 if(!stagetwo.amount_complete(y,surface->get_h()))
 294                                         return false;
 295                         }
 296                 }
 297         }
 298         else
 299         {
 300                 // NEAREST_NEIGHBOR
 301                 int x,y,u,v;
 302                 Point point,tmp;
 303                 for(y=0,point[1]=renddesc.get_tl()[1];y<surface->get_h();y++,pen.inc_y(),pen.dec_x(x),point[1]+=1.0/ph)
 304                 {
 305                         for(x=0,point[0]=renddesc.get_tl()[0];x<surface->get_w();x++,pen.inc_x(),point[0]+=1.0/pw)
 306                         {
 307                                 tmp=Point(cos_val*(point[0]-origin[0])+sin_val*(point[1]-origin[1]),-sin_val*(point[0]-origin[0])+cos_val*(point[1]-origin[1])) +origin;
 308                                 u=int((tmp[0]-tl[0])*pw);
 309                                 v=int((tmp[1]-tl[1])*ph);
 310                                 if(u<0)
 311                                         u=0;
 312                                 if(v<0)
 313                                         v=0;
 314                                 if(u>=source.get_w())
 315                                         u=source.get_w()-1;
 316                                 if(v>=source.get_h())
 317                                         v=source.get_h()-1;
 318                                 //pen.set_value(source[v][u]);
 319                                 (*surface)[y][x]=source[v][u];
 320                         }
 321                         if((y&31)==0 && cb)
 322                         {
 323                                 if(!stagetwo.amount_complete(y,surface->get_h()))
 324                                         return false;
 325                         }
 326                 }
 327         }
 328
 329         if(cb && !cb->amount_complete(10000,10000)) return false;
 330
 331         return true;
 332 }
 333
 334 Rect
 335 Rotate::get_full_bounding_rect(Context context)const
 336 {
 337         Rect under(context.get_full_bounding_rect());
 338         return get_transform()->perform(under);
 339 }
 340