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