synfig-core/trunk/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 **
  10 **      This package is free software; you can redistribute it and/or
  11 **      modify it under the terms of the GNU General Public License as
  12 **      published by the Free Software Foundation; either version 2 of
  13 **      the License, or (at your option) any later version.
  14 **
  15 **      This package is distributed in the hope that it will be useful,
  16 **      but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 **      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  18 **      General Public License for more details.
  19 **      \endlegal
  20 **
  21 ** === N O T E S ===========================================================
  22 **
  23 ** ========================================================================= */
  24
  25 /* === H E A D E R S ======================================================= */
  26
  27 #ifdef USING_PCH
  28 #       include "pch.h"
  29 #else
  30 #ifdef HAVE_CONFIG_H
  31 #       include <config.h>
  32 #endif
  33
  34 #include "rotate.h"
  35 #include <synfig/string.h>
  36 #include <synfig/time.h>
  37 #include <synfig/context.h>
  38 #include <synfig/paramdesc.h>
  39 #include <synfig/renddesc.h>
  40 #include <synfig/surface.h>
  41 #include <synfig/value.h>
  42 #include <synfig/valuenode.h>
  43 #include <synfig/transform.h>
  44 #include <ETL/misc>
  45
  46 #endif
  47
  48 /* === M A C R O S ========================================================= */
  49
  50 /* === G L O B A L S ======================================================= */
  51
  52 SYNFIG_LAYER_INIT(Rotate);
  53 SYNFIG_LAYER_SET_NAME(Rotate,"rotate");
  54 SYNFIG_LAYER_SET_LOCAL_NAME(Rotate,N_("Rotate"));
  55 SYNFIG_LAYER_SET_CATEGORY(Rotate,N_("Transform"));
  56 SYNFIG_LAYER_SET_VERSION(Rotate,"0.1");
  57 SYNFIG_LAYER_SET_CVS_ID(Rotate,"$Id$");
  58
  59 /* === P R O C E D U R E S ================================================= */
  60
  61 /* === M E T H O D S ======================================================= */
  62
  63 /* === E N T R Y P O I N T ================================================= */
  64
  65 Rotate::Rotate():
  66         origin  (0,0),
  67         amount  (Angle::deg(0)),
  68         sin_val (0),
  69         cos_val (1)
  70 {
  71 }
  72
  73 Rotate::~Rotate()
  74 {
  75 }
  76
  77 bool
  78 Rotate::set_param(const String & param, const ValueBase &value)
  79 {
  80         IMPORT(origin);
  81
  82         if(param=="amount" && value.same_type_as(amount))
  83         {
  84                 amount=value.get(amount);
  85                 sin_val=Angle::sin(amount).get();
  86                 cos_val=Angle::cos(amount).get();
  87                 return true;
  88         }
  89
  90         return false;
  91 }
  92
  93 ValueBase
  94 Rotate::get_param(const String &param)const
  95 {
  96         EXPORT(origin);
  97         EXPORT(amount);
  98
  99         EXPORT_NAME();
 100         EXPORT_VERSION();
 101
 102         return ValueBase();
 103 }
 104
 105 Layer::Vocab
 106 Rotate::get_param_vocab()const
 107 {
 108         Layer::Vocab ret;
 109
 110         ret.push_back(ParamDesc("origin")
 111                 .set_local_name(_("Origin"))
 112                 .set_description(_("Point where you want the origin to be"))
 113         );
 114
 115         ret.push_back(ParamDesc("amount")
 116                 .set_local_name(_("Amount"))
 117                 .set_description(_("Amount of rotation"))
 118                 .set_origin("origin")
 119         );
 120
 121         return ret;
 122 }
 123
 124 class Rotate_Trans : public Transform
 125 {
 126         etl::handle<const Rotate> layer;
 127 public:
 128         Rotate_Trans(const Rotate* x):Transform(x->get_guid()),layer(x) { }
 129
 130         synfig::Vector perform(const synfig::Vector& x)const
 131         {
 132                 Point pos(x-layer->origin);
 133                 return Point(layer->cos_val*pos[0]-layer->sin_val*pos[1],layer->sin_val*pos[0]+layer->cos_val*pos[1])+layer->origin;
 134         }
 135
 136         synfig::Vector unperform(const synfig::Vector& x)const
 137         {
 138                 Point pos(x-layer->origin);
 139                 return Point(layer->cos_val*pos[0]+layer->sin_val*pos[1],-layer->sin_val*pos[0]+layer->cos_val*pos[1])+layer->origin;
 140         }
 141 };
 142 etl::handle<Transform>
 143 Rotate::get_transform()const
 144 {
 145         return new Rotate_Trans(this);
 146 }
 147
 148 synfig::Layer::Handle
 149 Rotate::hit_check(synfig::Context context, const synfig::Point &p)const
 150 {
 151         Point pos(p-origin);
 152         Point newpos(cos_val*pos[0]+sin_val*pos[1],-sin_val*pos[0]+cos_val*pos[1]);
 153         newpos+=origin;
 154         return context.hit_check(newpos);
 155 }
 156
 157 Color
 158 Rotate::get_color(Context context, const Point &p)const
 159 {
 160         Point pos(p-origin);
 161         Point newpos(cos_val*pos[0]+sin_val*pos[1],-sin_val*pos[0]+cos_val*pos[1]);
 162         newpos+=origin;
 163         return context.get_color(newpos);
 164 }
 165
 166 bool
 167 Rotate::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
 168 {
 169         if(amount.dist(Angle::deg(0))==Angle::deg(0))
 170                 return context.accelerated_render(surface,quality,renddesc,cb);
 171         if(amount.dist(Angle::deg(180))==Angle::deg(0))
 172         {
 173                 RendDesc desc(renddesc);
 174                 desc.clear_flags();
 175                 Point tmp;
 176                 tmp=renddesc.get_tl()-origin;
 177                 desc.set_tl(Point(-tmp[0],-tmp[1])+origin);
 178                 tmp=renddesc.get_br()-origin;
 179                 desc.set_br(Point(-tmp[0],-tmp[1])+origin);
 180                 return context.accelerated_render(surface,quality,desc,cb);
 181         }
 182
 183         SuperCallback stageone(cb,0,9000,10000);
 184         SuperCallback stagetwo(cb,9000,10000,10000);
 185
 186         if(cb && !cb->amount_complete(0,10000))
 187                 return false;
 188
 189         Point tl(renddesc.get_tl()-origin);
 190         Point br(renddesc.get_br()-origin);
 191         Point rot_tl(cos_val*tl[0]+sin_val*tl[1],-sin_val*tl[0]+cos_val*tl[1]);
 192         Point rot_br(cos_val*br[0]+sin_val*br[1],-sin_val*br[0]+cos_val*br[1]);
 193         Point rot_tr(cos_val*br[0]+sin_val*tl[1],-sin_val*br[0]+cos_val*tl[1]);
 194         Point rot_bl(cos_val*tl[0]+sin_val*br[1],-sin_val*tl[0]+cos_val*br[1]);
 195         rot_tl+=origin;
 196         rot_br+=origin;
 197         rot_tr+=origin;
 198         rot_bl+=origin;
 199
 200         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]));
 201         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]));
 202
 203         if(tl[0]>br[0])
 204         {
 205                 tl[0]=max_point[0];
 206                 br[0]=min_point[0];
 207         }
 208         else
 209         {
 210                 br[0]=max_point[0];
 211                 tl[0]=min_point[0];
 212         }
 213         if(tl[1]>br[1])
 214         {
 215                 tl[1]=max_point[1];
 216                 br[1]=min_point[1];
 217         }
 218         else
 219         {
 220                 br[1]=max_point[1];
 221                 tl[1]=min_point[1];
 222         }
 223
 224         Real pw=(renddesc.get_w())/(renddesc.get_br()[0]-renddesc.get_tl()[0]);
 225         Real ph=(renddesc.get_h())/(renddesc.get_br()[1]-renddesc.get_tl()[1]);
 226
 227         RendDesc desc(renddesc);
 228         desc.clear_flags();
 229         //desc.set_flags(RendDesc::PX_ASPECT);
 230         desc.set_tl(tl);
 231         desc.set_br(br);
 232         desc.set_wh(round_to_int(pw*(br[0]-tl[0])),round_to_int(ph*(br[1]-tl[1])));
 233
 234         //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());
 235         //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());
 236
 237         Surface source;
 238         source.set_wh(desc.get_w(),desc.get_h());
 239
 240         if(!context.accelerated_render(&source,quality,desc,&stageone))
 241                 return false;
 242
 243         surface->set_wh(renddesc.get_w(),renddesc.get_h());
 244
 245         Surface::pen pen(surface->begin());
 246
 247         if(quality<=4)
 248         {
 249                 // CUBIC
 250                 int x,y;//,u,v,u2,v2;
 251                 Point point,tmp;
 252                 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)
 253                 {
 254                         for(x=0,point[0]=renddesc.get_tl()[0];x<surface->get_w();x++,pen.inc_x(),point[0]+=1.0/pw)
 255                         {
 256                                 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;
 257                                 (*surface)[y][x]=source.cubic_sample((tmp[0]-tl[0])*pw,(tmp[1]-tl[1])*ph);
 258                         }
 259                         if((y&31)==0 && cb)
 260                         {
 261                                 if(!stagetwo.amount_complete(y,surface->get_h()))
 262                                         return false;
 263                         }
 264                 }
 265         }
 266         else
 267         if(quality<=6)
 268         {
 269                 // INTERPOLATION_LINEAR
 270                 int x,y;//,u,v,u2,v2;
 271                 Point point,tmp;
 272                 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)
 273                 {
 274                         for(x=0,point[0]=renddesc.get_tl()[0];x<surface->get_w();x++,pen.inc_x(),point[0]+=1.0/pw)
 275                         {
 276                                 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;
 277                                 (*surface)[y][x]=source.linear_sample((tmp[0]-tl[0])*pw,(tmp[1]-tl[1])*ph);
 278                         }
 279                         if((y&31)==0 && cb)
 280                         {
 281                                 if(!stagetwo.amount_complete(y,surface->get_h()))
 282                                         return false;
 283                         }
 284                 }
 285         }
 286         else
 287         {
 288                 // NEAREST_NEIGHBOR
 289                 int x,y,u,v;
 290                 Point point,tmp;
 291                 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)
 292                 {
 293                         for(x=0,point[0]=renddesc.get_tl()[0];x<surface->get_w();x++,pen.inc_x(),point[0]+=1.0/pw)
 294                         {
 295                                 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;
 296                                 u=int((tmp[0]-tl[0])*pw);
 297                                 v=int((tmp[1]-tl[1])*ph);
 298                                 if(u<0)
 299                                         u=0;
 300                                 if(v<0)
 301                                         v=0;
 302                                 if(u>=source.get_w())
 303                                         u=source.get_w()-1;
 304                                 if(v>=source.get_h())
 305                                         v=source.get_h()-1;
 306                                 //pen.set_value(source[v][u]);
 307                                 (*surface)[y][x]=source[v][u];
 308                         }
 309                         if((y&31)==0 && cb)
 310                         {
 311                                 if(!stagetwo.amount_complete(y,surface->get_h()))
 312                                         return false;
 313                         }
 314                 }
 315         }
 316
 317         if(cb && !cb->amount_complete(10000,10000)) return false;
 318
 319         return true;
 320 }
 321
 322 Rect
 323 Rotate::get_full_bounding_rect(Context context)const
 324 {
 325         Rect under(context.get_full_bounding_rect());
 326         return get_transform()->perform(under);
 327 }
 328