synfig-core/trunk/src/modules/lyr_std/warp.cpp

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file warp.cpp
   3 **      \brief Template File
   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 "warp.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(Warp);
  53 SYNFIG_LAYER_SET_NAME(Warp,"warp");
  54 SYNFIG_LAYER_SET_LOCAL_NAME(Warp,_("Warp"));
  55 SYNFIG_LAYER_SET_CATEGORY(Warp,_("Distortions"));
  56 SYNFIG_LAYER_SET_VERSION(Warp,"0.1");
  57 SYNFIG_LAYER_SET_CVS_ID(Warp,"$Id$");
  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 Warp::Warp():
  66         src_tl  (-2,2),
  67         src_br  (2,-2),
  68         dest_tl (-1.8,2.1),
  69         dest_tr (1.8,2.1),
  70         dest_bl (-2.2,-2),
  71         dest_br (2.2,-2),
  72         clip    (true)
  73 {
  74         sync();
  75         horizon=4;
  76 }
  77
  78 Warp::~Warp()
  79 {
  80 }
  81
  82 inline Point
  83 Warp::transform_forward(const Point& p)const
  84 {
  85         return Point(
  86                 (inv_matrix[0][0]*p[0] + inv_matrix[0][1]*p[1] + inv_matrix[0][2])/(inv_matrix[2][0]*p[0] + inv_matrix[2][1]*p[1] + inv_matrix[2][2]),
  87                 (inv_matrix[1][0]*p[0] + inv_matrix[1][1]*p[1] + inv_matrix[1][2])/(inv_matrix[2][0]*p[0] + inv_matrix[2][1]*p[1] + inv_matrix[2][2])
  88         );
  89 }
  90
  91 inline Point
  92 Warp::transform_backward(const Point& p)const
  93 {
  94         return Point(
  95                 (matrix[0][0]*p[0] + matrix[0][1]*p[1] + matrix[0][2])/(matrix[2][0]*p[0] + matrix[2][1]*p[1] + matrix[2][2]),
  96                 (matrix[1][0]*p[0] + matrix[1][1]*p[1] + matrix[1][2])/(matrix[2][0]*p[0] + matrix[2][1]*p[1] + matrix[2][2])
  97         );
  98 }
  99
 100 inline Real
 101 Warp::transform_forward_z(const Point& p)const
 102 {
 103         return inv_matrix[2][0]*p[0] + inv_matrix[2][1]*p[1] + inv_matrix[2][2];
 104 }
 105
 106 inline Real
 107 Warp::transform_backward_z(const Point& p)const
 108 {
 109         return matrix[2][0]*p[0] + matrix[2][1]*p[1] + matrix[2][2];
 110 }
 111
 112 /*
 113 #define transform_forward(p) Point(     \
 114                 cache_a*p[0] + cache_b*p[1] + cache_c*p[0]*p[1] + cache_d,      \
 115                 cache_e*p[0] + cache_f*p[1] + cache_i*p[0]*p[1] + cache_j )
 116
 117 #define transform_backward(p) Point(    \
 118                 cache_a*p[0] + cache_b*p[1] + cache_c*p[0]*p[1] + cache_d,      \
 119                 cache_e*p[0] + cache_f*p[1] + cache_i*p[0]*p[1] + cache_j )
 120 */
 121
 122 #define triangle_area(a,b,c)    (0.5*(-b[0]*a[1]+c[0]*a[1]+a[0]*b[1]-c[0]*b[1]-a[0]*c[1]+b[0]*c[1]))
 123 #define quad_area(a,b,c,d) (triangle_area(a,b,c)+triangle_area(a,c,d))
 124
 125 Real mat3_determinant(Real matrix[3][3])
 126 {
 127   Real ret;
 128
 129   ret  = (matrix[0][0] *
 130                   (matrix[1][1] * matrix[2][2] -
 131                    matrix[1][2] * matrix[2][1]));
 132   ret -= (matrix[1][0] *
 133                   (matrix[0][1] * matrix[2][2] -
 134                    matrix[0][2] * matrix[2][1]));
 135   ret += (matrix[2][0] *
 136                   (matrix[0][1] * matrix[1][2] -
 137                    matrix[0][2] * matrix[1][1]));
 138
 139 return ret;
 140 }
 141
 142 void mat3_invert(Real in[3][3], Real out[3][3])
 143 {
 144   Real det(mat3_determinant(in));
 145
 146         if (det == 0.0)
 147     return;
 148
 149   det = 1.0 / det;
 150
 151   out[0][0] =   (in[1][1] * in[2][2] -
 152                        in[1][2] * in[2][1]) * det;
 153
 154   out[1][0] = - (in[1][0] * in[2][2] -
 155                        in[1][2] * in[2][0]) * det;
 156
 157   out[2][0] =   (in[1][0] * in[2][1] -
 158                        in[1][1] * in[2][0]) * det;
 159
 160   out[0][1] = - (in[0][1] * in[2][2] -
 161                        in[0][2] * in[2][1]) * det;
 162
 163   out[1][1] =   (in[0][0] * in[2][2] -
 164                        in[0][2] * in[2][0]) * det;
 165
 166   out[2][1] = - (in[0][0] * in[2][1] -
 167                        in[0][1] * in[2][0]) * det;
 168
 169   out[0][2] =   (in[0][1] * in[1][2] -
 170                        in[0][2] * in[1][1]) * det;
 171
 172   out[1][2] = - (in[0][0] * in[1][2] -
 173                        in[0][2] * in[1][0]) * det;
 174
 175   out[2][2] =   (in[0][0] * in[1][1] -
 176                        in[0][1] * in[1][0]) * det;
 177
 178 }
 179
 180 void
 181 Warp::sync()
 182 {
 183 /*      cache_a=(-dest_tl[0]+dest_tr[0])/(src_br[1]-src_tl[1]);
 184         cache_b=(-dest_tl[0]+dest_bl[0])/(src_br[0]-src_tl[0]);
 185         cache_c=(dest_tl[0]-dest_tr[0]+dest_br[0]-dest_bl[0])/((src_br[1]-src_tl[1])*(src_br[0]-src_tl[0]));
 186         cache_d=dest_tl[0];
 187
 188         cache_e=(-dest_tl[1]+dest_tr[1])/(src_br[0]-src_tl[0]);
 189         cache_f=(-dest_tl[1]+dest_bl[1])/(src_br[1]-src_tl[1]);
 190         cache_i=(dest_tl[1]-dest_tr[1]+dest_br[1]-dest_bl[1])/((src_br[1]-src_tl[1])*(src_br[0]-src_tl[0]));
 191         cache_j=dest_tl[1];
 192 */
 193
 194 /*      matrix[2][0]=(dest_tl[0]-dest_tr[0]+dest_br[0]-dest_bl[0])/((src_br[1]-src_tl[1])*(src_br[0]-src_tl[0]));
 195         matrix[2][1]=(dest_tl[1]-dest_tr[1]+dest_br[1]-dest_bl[1])/((src_br[1]-src_tl[1])*(src_br[0]-src_tl[0]));
 196         matrix[2][2]=quad_area(dest_tl,dest_tr,dest_br,dest_bl)/((src_br[1]-src_tl[1])*(src_br[0]-src_tl[0]));
 197
 198         matrix[0][0]=-(-dest_tl[1]+dest_tr[1])/(src_br[0]-src_tl[0]);
 199         matrix[0][1]=-(-dest_tl[1]+dest_bl[1])/(src_br[1]-src_tl[1]);
 200
 201         matrix[1][0]=-(-dest_tl[0]+dest_tr[0])/(src_br[1]-src_tl[1]);
 202         matrix[1][1]=-(-dest_tl[0]+dest_bl[0])/(src_br[0]-src_tl[0]);
 203
 204         matrix[0][2]=matrix[0][0]*dest_tl[0] + matrix[0][1]*dest_tl[1];
 205         matrix[1][2]=matrix[1][0]*dest_tl[0] + matrix[1][1]*dest_tl[1];
 206 */
 207
 208 #define matrix tmp
 209         Real tmp[3][3];
 210
 211         const Real& x1(min(src_br[0],src_tl[0]));
 212         const Real& y1(min(src_br[1],src_tl[1]));
 213         const Real& x2(max(src_br[0],src_tl[0]));
 214         const Real& y2(max(src_br[1],src_tl[1]));
 215
 216         Real tx1(dest_bl[0]);
 217         Real ty1(dest_bl[1]);
 218         Real tx2(dest_br[0]);
 219         Real ty2(dest_br[1]);
 220         Real tx3(dest_tl[0]);
 221         Real ty3(dest_tl[1]);
 222         Real tx4(dest_tr[0]);
 223         Real ty4(dest_tr[1]);
 224
 225         if(src_br[0]<src_tl[0])
 226                 swap(tx3,tx4),swap(ty3,ty4),swap(tx1,tx2),swap(ty1,ty2);
 227
 228         if(src_br[1]>src_tl[1])
 229                 swap(tx3,tx1),swap(ty3,ty1),swap(tx4,tx2),swap(ty4,ty2);
 230
 231         Real scalex;
 232         Real scaley;
 233
 234   scalex = scaley = 1.0;
 235
 236   if ((x2 - x1) > 0)
 237     scalex = 1.0 / (Real) (x2 - x1);
 238
 239   if ((y2 - y1) > 0)
 240     scaley = 1.0 / (Real) (y2 - y1);
 241
 242   /* Determine the perspective transform that maps from
 243    * the unit cube to the transformed coordinates
 244    */
 245   {
 246     Real dx1, dx2, dx3, dy1, dy2, dy3;
 247
 248     dx1 = tx2 - tx4;
 249     dx2 = tx3 - tx4;
 250     dx3 = tx1 - tx2 + tx4 - tx3;
 251
 252     dy1 = ty2 - ty4;
 253     dy2 = ty3 - ty4;
 254     dy3 = ty1 - ty2 + ty4 - ty3;
 255
 256     /*  Is the mapping affine?  */
 257     if ((dx3 == 0.0) && (dy3 == 0.0))
 258       {
 259         matrix[0][0] = tx2 - tx1;
 260         matrix[0][1] = tx4 - tx2;
 261         matrix[0][2] = tx1;
 262         matrix[1][0] = ty2 - ty1;
 263         matrix[1][1] = ty4 - ty2;
 264         matrix[1][2] = ty1;
 265         matrix[2][0] = 0.0;
 266         matrix[2][1] = 0.0;
 267       }
 268     else
 269       {
 270         Real det1, det2;
 271
 272         det1 = dx3 * dy2 - dy3 * dx2;
 273         det2 = dx1 * dy2 - dy1 * dx2;
 274
 275         if (det1 == 0.0 && det2 == 0.0)
 276           matrix[2][0] = 1.0;
 277         else
 278           matrix[2][0] = det1 / det2;
 279
 280         det1 = dx1 * dy3 - dy1 * dx3;
 281
 282         if (det1 == 0.0 && det2 == 0.0)
 283           matrix[2][1] = 1.0;
 284         else
 285           matrix[2][1] = det1 / det2;
 286
 287         matrix[0][0] = tx2 - tx1 + matrix[2][0] * tx2;
 288         matrix[0][1] = tx3 - tx1 + matrix[2][1] * tx3;
 289         matrix[0][2] = tx1;
 290
 291         matrix[1][0] = ty2 - ty1 + matrix[2][0] * ty2;
 292         matrix[1][1] = ty3 - ty1 + matrix[2][1] * ty3;
 293         matrix[1][2] = ty1;
 294       }
 295
 296     matrix[2][2] = 1.0;
 297   }
 298 #undef matrix
 299
 300         Real scaletrans[3][3]={
 301                         { scalex, 0, -x1*scalex },
 302                         { 0, scaley, -y1*scaley },
 303                         { 0, 0, 1 }
 304         };
 305
 306         Real t1,t2,t3;
 307
 308         for (int i = 0; i < 3; i++)
 309     {
 310       t1 = tmp[i][0];
 311       t2 = tmp[i][1];
 312       t3 = tmp[i][2];
 313
 314       for (int j = 0; j < 3; j++)
 315         {
 316           matrix[i][j]  = t1 * scaletrans[0][j];
 317           matrix[i][j] += t2 * scaletrans[1][j];
 318           matrix[i][j] += t3 * scaletrans[2][j];
 319         }
 320     }
 321
 322         mat3_invert(matrix, inv_matrix);
 323 /*
 324         gimp_matrix3_identity  (result);
 325   gimp_matrix3_translate (result, -x1, -y1);
 326   gimp_matrix3_scale     (result, scalex, scaley);
 327   gimp_matrix3_mult      (&matrix, result);
 328 */
 329 }
 330
 331 bool
 332 Warp::set_param(const String & param, const ValueBase &value)
 333 {
 334         IMPORT_PLUS(src_tl,sync());
 335         IMPORT_PLUS(src_br,sync());
 336         IMPORT_PLUS(dest_tl,sync());
 337         IMPORT_PLUS(dest_tr,sync());
 338         IMPORT_PLUS(dest_bl,sync());
 339         IMPORT_PLUS(dest_br,sync());
 340         IMPORT(clip);
 341         IMPORT(horizon);
 342
 343         return false;
 344 }
 345
 346 ValueBase
 347 Warp::get_param(const String &param)const
 348 {
 349         EXPORT(src_tl);
 350         EXPORT(src_br);
 351         EXPORT(dest_tl);
 352         EXPORT(dest_tr);
 353         EXPORT(dest_bl);
 354         EXPORT(dest_br);
 355         EXPORT(clip);
 356         EXPORT(horizon);
 357
 358         EXPORT_NAME();
 359         EXPORT_VERSION();
 360
 361         return ValueBase();
 362 }
 363
 364 Layer::Vocab
 365 Warp::get_param_vocab()const
 366 {
 367         Layer::Vocab ret;
 368
 369         ret.push_back(ParamDesc("src_tl")
 370                 .set_local_name(_("Source TL"))
 371                 .set_box("src_br")
 372         );
 373
 374         ret.push_back(ParamDesc("src_br")
 375                 .set_local_name(_("Source BR"))
 376         );
 377
 378         ret.push_back(ParamDesc("dest_tl")
 379                 .set_local_name(_("Dest TL"))
 380                 .set_connect("dest_tr")
 381         );
 382
 383         ret.push_back(ParamDesc("dest_tr")
 384                 .set_local_name(_("Dest TR"))
 385                 .set_connect("dest_br")
 386         );
 387
 388         ret.push_back(ParamDesc("dest_br")
 389                 .set_local_name(_("Dest BR"))
 390                 .set_connect("dest_bl")
 391         );
 392
 393         ret.push_back(ParamDesc("dest_bl")
 394                 .set_local_name(_("Dest BL"))
 395                 .set_connect("dest_tl")
 396         );
 397
 398         ret.push_back(ParamDesc("clip")
 399                 .set_local_name(_("Clip"))
 400         );
 401
 402         ret.push_back(ParamDesc("horizon")
 403                 .set_local_name(_("Horizon"))
 404         );
 405
 406         return ret;
 407 }
 408
 409
 410 class Warp_Trans : public Transform
 411 {
 412         etl::handle<const Warp> layer;
 413 public:
 414         Warp_Trans(const Warp* x):Transform(x->get_guid()),layer(x) { }
 415
 416         synfig::Vector perform(const synfig::Vector& x)const
 417         {
 418                 return layer->transform_backward(x);
 419                 //Point pos(x-layer->origin);
 420                 //return Point(layer->cos_val*pos[0]-layer->sin_val*pos[1],layer->sin_val*pos[0]+layer->cos_val*pos[1])+layer->origin;
 421         }
 422
 423         synfig::Vector unperform(const synfig::Vector& x)const
 424         {
 425
 426                 return layer->transform_forward(x);
 427                 //Point pos(x-layer->origin);
 428                 //return Point(layer->cos_val*pos[0]+layer->sin_val*pos[1],-layer->sin_val*pos[0]+layer->cos_val*pos[1])+layer->origin;
 429         }
 430 };
 431 etl::handle<Transform>
 432 Warp::get_transform()const
 433 {
 434         return new Warp_Trans(this);
 435 }
 436
 437 synfig::Layer::Handle
 438 Warp::hit_check(synfig::Context context, const synfig::Point &p)const
 439 {
 440         Point newpos(transform_forward(p));
 441
 442         if(clip)
 443         {
 444                 Rect rect(src_tl,src_br);
 445                 if(!rect.is_inside(newpos))
 446                         return 0;
 447         }
 448
 449         return context.hit_check(newpos);
 450 }
 451
 452 Color
 453 Warp::get_color(Context context, const Point &p)const
 454 {
 455         Point newpos(transform_forward(p));
 456
 457         if(clip)
 458         {
 459                 Rect rect(src_tl,src_br);
 460                 if(!rect.is_inside(newpos))
 461                         return Color::alpha();
 462         }
 463
 464         const float z(transform_backward_z(newpos));
 465         if(z>0 && z<horizon)
 466                 return context.get_color(newpos);
 467         else
 468                 return Color::alpha();
 469 }
 470
 471 //#define ACCEL_WARP_IS_BROKEN 1
 472
 473 bool
 474 Warp::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
 475 {
 476         SuperCallback stageone(cb,0,9000,10000);
 477         SuperCallback stagetwo(cb,9000,10000,10000);
 478
 479         Real pw=(renddesc.get_w())/(renddesc.get_br()[0]-renddesc.get_tl()[0]);
 480         Real ph=(renddesc.get_h())/(renddesc.get_br()[1]-renddesc.get_tl()[1]);
 481
 482         if(cb && !cb->amount_complete(0,10000))
 483                 return false;
 484
 485         Point tl(renddesc.get_tl());
 486         Point br(renddesc.get_br());
 487
 488         Rect bounding_rect;
 489
 490         Rect render_rect(tl,br);
 491         Rect clip_rect(Rect::full_plane());
 492         Rect dest_rect(dest_tl,dest_br); dest_rect.expand(dest_tr).expand(dest_bl);
 493
 494         Real zoom_factor(1.0);
 495
 496         // Quick exclusion clip, if necessary
 497         if(clip && !intersect(render_rect,dest_rect))
 498         {
 499                 surface->set_wh(renddesc.get_w(),renddesc.get_h());
 500                 surface->clear();
 501                 return true;
 502         }
 503
 504         {
 505                 Rect other(render_rect);
 506                 if(clip)
 507                         other&=dest_rect;
 508
 509                 Point min(other.get_min());
 510                 Point max(other.get_max());
 511
 512                 bool init_point_set=false;
 513
 514                 // Point trans_point[4];
 515                 Point p;
 516                 // Real trans_z[4];
 517                 Real z,minz(10000000000000.0f),maxz(0);
 518
 519                 //! \todo checking the 4 corners for 0<=z<horizon*2 and using
 520                 //! only 4 corners which satisfy this condition isn't the
 521                 //! right thing to do.  It's possible that none of the 4
 522                 //! corners fall within that range, and yet content of the
 523                 //! tile does.
 524                 p=transform_forward(min);
 525                 z=transform_backward_z(p);
 526                 if(z>0 && z<horizon*2)
 527                 {
 528                         if(init_point_set)
 529                                 bounding_rect.expand(p);
 530                         else
 531                                 bounding_rect=Rect(p);
 532                         init_point_set=true;
 533                         maxz=std::max(maxz,z);
 534                         minz=std::min(minz,z);
 535                 }
 536
 537                 p=transform_forward(max);
 538                 z=transform_backward_z(p);
 539                 if(z>0 && z<horizon*2)
 540                 {
 541                         if(init_point_set)
 542                                 bounding_rect.expand(p);
 543                         else
 544                                 bounding_rect=Rect(p);
 545                         init_point_set=true;
 546                         maxz=std::max(maxz,z);
 547                         minz=std::min(minz,z);
 548                 }
 549
 550                 swap(min[1],max[1]);
 551
 552                 p=transform_forward(min);
 553                 z=transform_backward_z(p);
 554                 if(z>0 && z<horizon*2)
 555                 {
 556                         if(init_point_set)
 557                                 bounding_rect.expand(p);
 558                         else
 559                                 bounding_rect=Rect(p);
 560                         init_point_set=true;
 561                         maxz=std::max(maxz,z);
 562                         minz=std::min(minz,z);
 563                 }
 564
 565                 p=transform_forward(max);
 566                 z=transform_backward_z(p);
 567                 if(z>0 && z<horizon*2)
 568                 {
 569                         if(init_point_set)
 570                                 bounding_rect.expand(p);
 571                         else
 572                                 bounding_rect=Rect(p);
 573                         init_point_set=true;
 574                         maxz=std::max(maxz,z);
 575                         minz=std::min(minz,z);
 576                 }
 577
 578                 if(!init_point_set)
 579                 {
 580                         surface->set_wh(renddesc.get_w(),renddesc.get_h());
 581                         surface->clear();
 582                         return true;
 583                 }
 584                 zoom_factor=(1+(maxz-minz));
 585
 586         }
 587
 588 #ifdef ACCEL_WARP_IS_BROKEN
 589         return Layer::accelerated_render(context,surface,quality,renddesc, cb);
 590 #else
 591
 592         /*swap(tl[1],br[1]);
 593         bounding_rect
 594                 .expand(transform_forward(tl))
 595                 .expand(transform_forward(br))
 596         ;
 597         swap(tl[1],br[1]);*/
 598
 599         //synfig::warning("given window: [%f,%f]-[%f,%f] %dx%d",tl[0],tl[1],br[0],br[1],renddesc.get_w(),renddesc.get_h());
 600         //synfig::warning("Projected: [%f,%f]-[%f,%f]",bounding_rect.get_min()[0],bounding_rect.get_min()[1],bounding_rect.get_max()[0],bounding_rect.get_max()[1]);
 601
 602         // If we are clipping, then go ahead and clip to the
 603         // source rectangle
 604         if(clip)
 605                 clip_rect&=Rect(src_tl,src_br);
 606
 607         // Bound ourselves to the bounding rectangle of
 608         // what is under us
 609         clip_rect&=context.get_full_bounding_rect();//.expand_x(abs(zoom_factor/pw)).expand_y(abs(zoom_factor/ph));
 610
 611         bounding_rect&=clip_rect;
 612
 613         Point min_point(bounding_rect.get_min());
 614         Point max_point(bounding_rect.get_max());
 615
 616
 617         if(tl[0]>br[0])
 618         {
 619                 tl[0]=max_point[0];
 620                 br[0]=min_point[0];
 621         }
 622         else
 623         {
 624                 br[0]=max_point[0];
 625                 tl[0]=min_point[0];
 626         }
 627         if(tl[1]>br[1])
 628         {
 629                 tl[1]=max_point[1];
 630                 br[1]=min_point[1];
 631         }
 632         else
 633         {
 634                 br[1]=max_point[1];
 635                 tl[1]=min_point[1];
 636         }
 637
 638
 639
 640         const int tmp_d(max(renddesc.get_w(),renddesc.get_h()));
 641         Real src_pw=(tmp_d*zoom_factor)/(br[0]-tl[0]);
 642         Real src_ph=(tmp_d*zoom_factor)/(br[1]-tl[1]);
 643
 644
 645         RendDesc desc(renddesc);
 646         desc.clear_flags();
 647         //desc.set_flags(RendDesc::PX_ASPECT);
 648         desc.set_tl(tl);
 649         desc.set_br(br);
 650         desc.set_wh(ceil_to_int(src_pw*(br[0]-tl[0])),ceil_to_int(src_ph*(br[1]-tl[1])));
 651
 652         //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());
 653         if(desc.get_w()==0 && desc.get_h()==0)
 654         {
 655                 surface->set_wh(renddesc.get_w(),renddesc.get_h());
 656                 surface->clear();
 657                 return true;
 658         }
 659
 660         // Recalculate the pixel widths for the src renddesc
 661         src_pw=(desc.get_w())/(desc.get_br()[0]-desc.get_tl()[0]);
 662         src_ph=(desc.get_h())/(desc.get_br()[1]-desc.get_tl()[1]);
 663
 664
 665         Surface source;
 666         source.set_wh(desc.get_w(),desc.get_h());
 667
 668         if(!context.accelerated_render(&source,quality,desc,&stageone))
 669                 return false;
 670
 671         surface->set_wh(renddesc.get_w(),renddesc.get_h());
 672         surface->clear();
 673
 674         Surface::pen pen(surface->begin());
 675
 676         if(quality<=4)
 677         {
 678                 // CUBIC
 679                 int x,y;
 680                 float u,v;
 681                 Point point,tmp;
 682                 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)
 683                 {
 684                         for(x=0,point[0]=renddesc.get_tl()[0];x<surface->get_w();x++,pen.inc_x(),point[0]+=1.0/pw)
 685                         {
 686                                 tmp=transform_forward(point);
 687                                 const float z(transform_backward_z(tmp));
 688                                 if(!clip_rect.is_inside(tmp) || !(z>0 && z<horizon))
 689                                 {
 690                                         (*surface)[y][x]=Color::alpha();
 691                                         continue;
 692                                 }
 693
 694                                 u=(tmp[0]-tl[0])*src_pw;
 695                                 v=(tmp[1]-tl[1])*src_ph;
 696
 697                                 if(u<0 || v<0 || u>=source.get_w() || v>=source.get_h() || isnan(u) || isnan(v))
 698                                         (*surface)[y][x]=context.get_color(tmp);
 699                                 else
 700                                         (*surface)[y][x]=source.cubic_sample(u,v);
 701                         }
 702                         if(y&31==0 && cb)
 703                         {
 704                                 if(!stagetwo.amount_complete(y,surface->get_h()))
 705                                         return false;
 706                         }
 707                 }
 708         }
 709         else
 710         if(quality<=6)
 711         {
 712                 // INTERPOLATION_LINEAR
 713                 int x,y;
 714                 float u,v;
 715                 Point point,tmp;
 716                 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)
 717                 {
 718                         for(x=0,point[0]=renddesc.get_tl()[0];x<surface->get_w();x++,pen.inc_x(),point[0]+=1.0/pw)
 719                         {
 720                                 tmp=transform_forward(point);
 721                                 const float z(transform_backward_z(tmp));
 722                                 if(!clip_rect.is_inside(tmp) || !(z>0 && z<horizon))
 723                                 {
 724                                         (*surface)[y][x]=Color::alpha();
 725                                         continue;
 726                                 }
 727
 728                                 u=(tmp[0]-tl[0])*src_pw;
 729                                 v=(tmp[1]-tl[1])*src_ph;
 730
 731                                 if(u<0 || v<0 || u>=source.get_w() || v>=source.get_h() || isnan(u) || isnan(v))
 732                                         (*surface)[y][x]=context.get_color(tmp);
 733                                 else
 734                                         (*surface)[y][x]=source.linear_sample(u,v);
 735                         }
 736                         if(y&31==0 && cb)
 737                         {
 738                                 if(!stagetwo.amount_complete(y,surface->get_h()))
 739                                         return false;
 740                         }
 741                 }
 742         }
 743         else
 744         {
 745                 // NEAREST_NEIGHBOR
 746                 int x,y;
 747                 float u,v;
 748                 Point point,tmp;
 749                 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)
 750                 {
 751                         for(x=0,point[0]=renddesc.get_tl()[0];x<surface->get_w();x++,pen.inc_x(),point[0]+=1.0/pw)
 752                         {
 753                                 tmp=transform_forward(point);
 754                                 const float z(transform_backward_z(tmp));
 755                                 if(!clip_rect.is_inside(tmp) || !(z>0 && z<horizon))
 756                                 {
 757                                         (*surface)[y][x]=Color::alpha();
 758                                         continue;
 759                                 }
 760
 761                                 u=(tmp[0]-tl[0])*src_pw;
 762                                 v=(tmp[1]-tl[1])*src_ph;
 763
 764                                 if(u<0 || v<0 || u>=source.get_w() || v>=source.get_h() || isnan(u) || isnan(v))
 765                                         (*surface)[y][x]=context.get_color(tmp);
 766                                 else
 767                                         //pen.set_value(source[v][u]);
 768                                         (*surface)[y][x]=source[floor_to_int(v)][floor_to_int(u)];
 769                         }
 770                         if(y&31==0 && cb)
 771                         {
 772                                 if(!stagetwo.amount_complete(y,surface->get_h()))
 773                                         return false;
 774                         }
 775                 }
 776         }
 777
 778 #endif
 779
 780         if(cb && !cb->amount_complete(10000,10000)) return false;
 781
 782         return true;
 783 }
 784
 785 synfig::Rect
 786 Warp::get_bounding_rect()const
 787 {
 788         return Rect::full_plane();
 789 }
 790
 791 synfig::Rect
 792 Warp::get_full_bounding_rect(Context context)const
 793 {
 794 //      return Rect::full_plane();
 795
 796         Rect under(context.get_full_bounding_rect());
 797
 798         if(clip)
 799         {
 800                 under&=Rect(src_tl,src_br);
 801         }
 802
 803         return get_transform()->perform(under);
 804
 805         /*
 806         Rect under(context.get_full_bounding_rect());
 807         Rect ret(Rect::zero());
 808
 809         if(under.area()==HUGE_VAL)
 810                 return Rect::full_plane();
 811
 812         ret.expand(
 813                 transform_backward(
 814                         under.get_min()
 815                 )
 816         );
 817         ret.expand(
 818                 transform_backward(
 819                         under.get_max()
 820                 )
 821         );
 822         ret.expand(
 823                 transform_backward(
 824                         Vector(
 825                                 under.get_min()[0],
 826                                 under.get_max()[1]
 827                         )
 828                 )
 829         );
 830         ret.expand(
 831                 transform_backward(
 832                         Vector(
 833                                 under.get_max()[0],
 834                                 under.get_min()[1]
 835                         )
 836                 )
 837         );
 838
 839         if(ret.area()==HUGE_VAL)
 840                 return Rect::full_plane();
 841
 842         return ret;
 843         */
 844 }