synfig-core/trunk/src/synfig/render.cpp

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file synfig/render.cpp
   3 **      \brief Renderer
   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 /* ========================================================================= */
  22
  23 /* === H E A D E R S ======================================================= */
  24
  25 #define SYNFIG_NO_ANGLE
  26
  27 #ifdef USING_PCH
  28 #       include "pch.h"
  29 #else
  30 #ifdef HAVE_CONFIG_H
  31 #       include <config.h>
  32 #endif
  33
  34 #ifndef WIN32
  35 #include <unistd.h>
  36 #include <sys/types.h>
  37 #include <signal.h>
  38 #endif
  39
  40 #include "render.h"
  41 #include "target.h"
  42 #include "canvas.h"
  43 #include <ETL/handle>
  44 #include <cassert>
  45 #include "context.h"
  46 #include "surface.h"
  47
  48 #endif
  49
  50 using namespace std;
  51 using namespace synfig;
  52 using namespace etl;
  53
  54 /* === M A C R O S ========================================================= */
  55
  56 /* === P R O C E D U R E S ================================================= */
  57
  58 bool
  59 synfig::parametric_render(
  60         Context context,
  61         Surface &surface,
  62         const RendDesc &desc,
  63         ProgressCallback *callback
  64 )
  65 {
  66         Point::value_type
  67                 u,v,            // Current location in image
  68                 su,sv,          // Starting locations
  69                 du, dv,         // Distance between pixels
  70                 dsu,dsv;        // Distance between subpixels
  71
  72         bool
  73                 no_clamp=!desc.get_clamp();
  74
  75         int
  76                 w(desc.get_w()),
  77                 h(desc.get_h()),
  78                 a(desc.get_antialias());
  79
  80         Point
  81                 tl(desc.get_tl()),
  82                 br(desc.get_br());
  83
  84         //Gamma
  85         //      gamma(desc.get_gamma());
  86
  87         int
  88                 x,y,            // Current location on output bitmap
  89                 x2,y2;          // Subpixel counters
  90
  91         Color::value_type
  92                 pool;           // Alpha pool (for correct alpha antialiasing)
  93
  94         // Calculate the number of channels
  95         //chan=channels(desc.get_pixel_format());
  96
  97         // Calculate the distance between pixels
  98         du=(br[0]-tl[0])/(Point::value_type)w;
  99         dv=(br[1]-tl[1])/(Point::value_type)h;
 100
 101         // Calculate the distance between sub pixels
 102         dsu=du/(Point::value_type)a;
 103         dsv=dv/(Point::value_type)a;
 104
 105         // Calculate the starting points
 106         //su=tl[0]+(du-dsu)/(Point::value_type)2.0;
 107         //sv=tl[1]-(dv-dsv)/(Point::value_type)2.0;
 108         su=tl[0];
 109         sv=tl[1];
 110
 111         surface.set_wh(desc.get_w(),desc.get_h());
 112
 113         assert(surface);
 114
 115         // Loop through all horizontal lines
 116         for(y=0,v=sv;y<h;y++,v+=dv)
 117         {
 118                 // Set the current pixel pointer
 119                 // to the start of the line
 120                 Color *colordata=surface[y];
 121
 122                 assert(colordata);
 123
 124                 // If we have a callback that we need
 125                 // to report to, do so now.
 126                 if(callback)
 127                         if( callback->amount_complete(y,h) == false )
 128                         {
 129                                 // If the callback returns false,
 130                                 // then the render has been aborted.
 131
 132                                 return false;
 133                         }
 134
 135                 // Loop through every pixel in row
 136                 for(x=0,u=su;x<w;x++,u+=du)
 137                 {
 138                         Color &c(*(colordata++));
 139                         c=Color::alpha();
 140
 141                         // Loop through all subpixels
 142                         for(y2=0,pool=0;y2<a;y2++)
 143                                 for(x2=0;x2<a;x2++)
 144                                 {
 145                                         Color color=context.get_color(
 146                                                 Point(
 147                                                         u+(Point::value_type)(x2)*dsu,
 148                                                         v+(Point::value_type)(y2)*dsv
 149                                                         )
 150                                                 );
 151                                         if(!no_clamp)
 152                                         {
 153                                                 color=color.clamped();
 154                                                 c+=color*color.get_a();
 155                                                 pool+=color.get_a();
 156                                         }
 157                                         else
 158                                         {
 159                                                 c+=color*color.get_a();
 160                                                 pool+=color.get_a();
 161                                         }
 162                                 }
 163                         if(pool)
 164                                 c/=pool;
 165                 }
 166         }
 167
 168         // Give the callback one more last call,
 169         // this time with the full height as the
 170         // current line
 171         if(callback)
 172                 callback->amount_complete(h,h);
 173
 174         // Report our success
 175         return(true);
 176 }
 177
 178 bool
 179 synfig::render(
 180         Context context,
 181         Target_Scanline::Handle target,
 182         const RendDesc &desc,
 183         ProgressCallback *callback)
 184 {
 185         Point::value_type
 186                 u,v,            // Current location in image
 187                 su,sv,          // Starting locations
 188                 du, dv,         // Distance between pixels
 189                 dsu,dsv;        // Distance between subpixels
 190
 191         bool
 192                 no_clamp=!desc.get_clamp();
 193
 194         int
 195                 w(desc.get_w()),
 196                 h(desc.get_h()),
 197                 a(desc.get_antialias());
 198
 199         Point
 200                 tl(desc.get_tl()),
 201                 br(desc.get_br());
 202
 203         //Gamma
 204         //      gamma(desc.get_gamma());
 205
 206         int
 207                 x,y,            // Current location on output bitmap
 208                 x2,y2;          // Subpixel counters
 209
 210         Color::value_type
 211                 pool;           // Alpha pool (for correct alpha antialiasing)
 212
 213         assert(target);
 214
 215         // If we do not have a a target then bail
 216         if(!target)
 217                 return false;
 218
 219         // Calculate the number of channels
 220         //chan=channels(desc.get_pixel_format());
 221
 222         // Calculate the distance between pixels
 223         du=(br[0]-tl[0])/(Point::value_type)w;
 224         dv=(br[1]-tl[1])/(Point::value_type)h;
 225
 226         // Calculate the distance between sub pixels
 227         dsu=du/(Point::value_type)a;
 228         dsv=dv/(Point::value_type)a;
 229
 230         // Calculate the starting points
 231         su=tl[0]+(du-dsu)/(Point::value_type)2.0;
 232         sv=tl[1]-(dv-dsv)/(Point::value_type)2.0;
 233
 234         // Mark the start of a new frame.
 235         if(!target->start_frame(callback))
 236                 return false;
 237
 238         // Loop through all horizontal lines
 239         for(y=0,v=sv;y<h;y++,v+=dv)
 240         {
 241                 // Set the current pixel pointer
 242                 // to the start of the line
 243                 Color *colordata=target->start_scanline(y);
 244
 245                 if(!colordata)
 246                 {
 247                         if(callback)callback->error(_("Target panic"));
 248                         else throw(string(_("Target panic")));
 249                         return false;
 250                 }
 251
 252                 // If we have a callback that we need
 253                 // to report to, do so now.
 254                 if(callback)
 255                         if( callback->amount_complete(y,h) == false )
 256                         {
 257                                 // If the callback returns false,
 258                                 // then the render has been aborted.
 259                                 // Exit gracefully.
 260
 261                                 target->end_scanline();
 262                                 target->end_frame();
 263                                 return false;
 264                         }
 265
 266                 // Loop through every pixel in row
 267                 for(x=0,u=su;x<w;x++,u+=du)
 268                 {
 269                         Color &c(*(colordata++));
 270                         c=Color::alpha();
 271
 272                         // Loop through all subpixels
 273                         for(y2=0,pool=0;y2<a;y2++)
 274                                 for(x2=0;x2<a;x2++)
 275                                 {
 276                                         Color color=context.get_color(
 277                                                 Point(
 278                                                         u+(Point::value_type)(x2)*dsu,
 279                                                         v+(Point::value_type)(y2)*dsv
 280                                                         )
 281                                                 );
 282                                         if(!no_clamp)
 283                                         {
 284                                                 color=color.clamped();
 285                                                 c+=color*color.get_a();
 286                                                 pool+=color.get_a();
 287                                         }
 288                                         else
 289                                         {
 290                                                 c+=color*color.get_a();
 291                                                 pool+=color.get_a();
 292                                         }
 293                                 }
 294                         if(pool)
 295                                 c/=pool;
 296                 }
 297
 298                 // Send the buffer to the render target.
 299                 // If anything goes wrong, cleanup and bail.
 300                 if(!target->end_scanline())
 301                 {
 302                         if(callback)callback->error(_("Target panic"));
 303                         else throw(string(_("Target panic")));
 304                         return false;
 305                 }
 306         }
 307
 308         // Finish up the target's frame
 309         target->end_frame();
 310
 311         // Give the callback one more last call,
 312         // this time with the full height as the
 313         // current line
 314         if(callback)
 315                 callback->amount_complete(h,h);
 316
 317         // Report our success
 318         return(true);
 319 }
 320
 321 bool
 322 synfig::render_threaded(
 323         Context context,
 324         Target_Scanline::Handle target,
 325         const RendDesc &desc,
 326         ProgressCallback *callback,
 327         int threads)
 328 {
 329 #ifndef WIN32
 330     struct _render_thread
 331     {
 332                 int
 333                         pipe_read,
 334                         pipe_write,
 335                         pid;
 336                 _render_thread()
 337                 {
 338                         pipe(&pipe_read);
 339                         pid=0;
 340                 }
 341                 ~_render_thread()
 342                 {
 343                         close(pipe_read);
 344                         close(pipe_write);
 345                         if(pid)
 346                         {
 347                                 kill(pid,9);
 348                         }
 349                 }
 350     } *render_thread;
 351
 352     int i, mythread=-1;
 353
 354         Point::value_type
 355                 u,v,            // Current location in image
 356                 su,sv,          // Starting locations
 357                 du, dv,         // Distance between pixels
 358                 dsu,dsv;        // Distance between subpixels
 359
 360         bool
 361                 no_clamp=!desc.get_clamp();
 362
 363         int
 364                 w(desc.get_w()),
 365                 h(desc.get_h()),
 366                 a(desc.get_antialias());
 367
 368         Point
 369                 tl(desc.get_tl()),
 370                 br(desc.get_br());
 371
 372         int
 373                 x,y,            // Current location on output bitmap
 374                 x2,y2;          // Subpixel counters
 375
 376         Color::value_type
 377                 pool;           // Alpha pool (for correct alpha antialiasing)
 378
 379         assert(target);
 380
 381         // If we do not have a a target then bail
 382         if(!target)
 383                 return false;
 384
 385         // Calculate the distance between pixels
 386         du=(br[0]-tl[0])/(Point::value_type)w;
 387         dv=(br[1]-tl[1])/(Point::value_type)h;
 388
 389         // Calculate the distance between sub pixels
 390         dsu=du/(Point::value_type)a;
 391         dsv=dv/(Point::value_type)a;
 392
 393         // Calculate the starting points
 394         su=tl[0]+(du-dsu)/(Point::value_type)2.0;
 395         sv=tl[1]-(dv-dsv)/(Point::value_type)2.0;
 396
 397     render_thread=new _render_thread[threads];
 398
 399         // Start the forks
 400     for(i=0;i<threads;i++)
 401     {
 402                 int pid=fork();
 403                 if(pid==0)
 404                 {
 405                 mythread=i;
 406                 goto renderthread;
 407                 }
 408                 render_thread[i].pid=pid;
 409     }
 410
 411         // Mark the start of a new frame.
 412         if(!target->start_frame(callback))
 413                 return false;
 414
 415     for(y=0;y<h;y++)
 416     {
 417                 // Set the current pixel pointer
 418                 // to the start of the line
 419                 Color *colordata(target->start_scanline(y));
 420
 421                 if(!colordata)
 422                 {
 423                         if(callback)callback->error(_("Target panic"));
 424                         else throw(string(_("Target panic")));
 425                         return false;
 426                 }
 427
 428                 // If we have a callback that we need
 429                 // to report to, do so now.
 430                 if(callback)
 431                         if( callback->amount_complete(y,h) == false )
 432                         {
 433                                 // If the callback returns false,
 434                                 // then the render has been aborted.
 435                                 // Exit gracefully.
 436
 437                                 target->end_scanline();
 438                                 target->end_frame();
 439                                 delete [] render_thread;
 440                                 return false;
 441                         }
 442
 443                 read(render_thread[y%threads].pipe_read,colordata,w*sizeof(Color));
 444
 445                 // Send the buffer to the render target.
 446                 // If anything goes wrong, cleanup and bail.
 447                 if(!target->end_scanline())
 448                 {
 449                         delete [] render_thread;
 450                         if(callback)callback->error(_("Target panic"));
 451                         else throw(string(_("Target panic")));
 452                         return false;
 453                 }
 454     }
 455
 456         // Finish up the target's frame
 457         target->end_frame();
 458
 459         // Give the callback one more last call,
 460         // this time with the full height as the
 461         // current line
 462         if(callback)
 463                 callback->amount_complete(h,h);
 464
 465     delete [] render_thread;
 466     return true;
 467
 468 renderthread:
 469
 470         // Change the random seed, so that each thread has a different one
 471         srand(mythread*20+threads+time(0));
 472
 473         Color *buffer(new Color[w]);
 474
 475         // Loop through all horizontal lines
 476         for(y=mythread,v=sv+dv*(Real)mythread;y<h;y+=threads,v+=dv*(Real)threads)
 477         {
 478                 // Set the current pixel pointer
 479                 // to the start of the line
 480                 Color* colordata(buffer);
 481
 482                 // Loop through every pixel in row
 483                 for(x=0,u=su;x<w;x++,u+=du)
 484                 {
 485                         Color &c(*(colordata++));
 486                         c=Color::alpha();
 487
 488                         // Loop through all subpixels
 489                         for(y2=0,pool=0;y2<a;y2++)
 490                                 for(x2=0;x2<a;x2++)
 491                                 {
 492                                         Color color=context.get_color(
 493                                                 Point(
 494                                                         u+(Point::value_type)(x2)*dsu,
 495                                                         v+(Point::value_type)(y2)*dsv
 496                                                         )
 497                                                 );
 498                                         if(!no_clamp)
 499                                         {
 500                                                 color=color.clamped();
 501                                                 c+=color*color.get_a();
 502                                                 pool+=color.get_a();
 503                                         }
 504                                         else
 505                                         {
 506                                                 c+=color*color.get_a();
 507                                                 pool+=color.get_a();
 508                                         }
 509                                 }
 510                         if(pool)
 511                                 c/=pool;
 512                 }
 513
 514                 // Send the buffer to the primary thread.
 515                 write(render_thread[mythread].pipe_write,buffer,w*sizeof(Color));
 516         }
 517
 518         delete [] buffer;
 519
 520     _exit(0);
 521         return false;
 522 #else
 523         return render(context, target, desc, callback);
 524
 525 #endif
 526 }