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

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file layer_bitmap.cpp
   3 **      \brief Template Header
   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 #include "layer_bitmap.h"
  35 #include "layer.h"
  36 #include "time.h"
  37 #include "string.h"
  38 #include "vector.h"
  39
  40 #include "context.h"
  41 #include "time.h"
  42 #include "color.h"
  43 #include "surface.h"
  44 #include "renddesc.h"
  45 #include "target.h"
  46
  47 #include "general.h"
  48 #include "paramdesc.h"
  49 #include <ETL/misc>
  50
  51 #endif
  52
  53 /* === U S I N G =========================================================== */
  54
  55 using namespace synfig;
  56 using namespace std;
  57 using namespace etl;
  58
  59 /* === G L O B A L S ======================================================= */
  60
  61 /* === P R O C E D U R E S ================================================= */
  62
  63 /* === M E T H O D S ======================================================= */
  64
  65 synfig::Layer_Bitmap::Layer_Bitmap():
  66     Layer_Composite     (1.0,Color::BLEND_COMPOSITE),
  67         tl                              (-0.5,0.5),
  68         br                              (0.5,-0.5),
  69         c                               (1),
  70         surface                 (128,128),
  71         trimmed                 (false),
  72         gamma_adjust    (1.0)
  73 {
  74 }
  75
  76 bool
  77 synfig::Layer_Bitmap::set_param(const String & param, ValueBase value)
  78 {
  79         IMPORT(tl);
  80         IMPORT(br);
  81         IMPORT(c);
  82         if(param=="gamma_adjust"&& value.get_type()==ValueBase::TYPE_REAL)
  83         {
  84                 gamma_adjust=1.0/value.get(Real());
  85                 //gamma_adjust.set_gamma(1.0/value.get(Real()));
  86                 return true;
  87         }
  88
  89         return Layer_Composite::set_param(param,value);
  90 }
  91
  92 ValueBase
  93 synfig::Layer_Bitmap::get_param(const String & param)const
  94 {
  95         EXPORT(tl);
  96         EXPORT(br);
  97         EXPORT(c);
  98         if(param=="gamma_adjust")
  99                 return 1.0/gamma_adjust;
 100
 101         if(param=="_width")
 102         {
 103                 if (trimmed) return int(width);
 104                 return surface.get_w();
 105         }
 106         if(param=="_height")
 107         {
 108                 if (trimmed) return int(height);
 109                 return surface.get_h();
 110         }
 111
 112         return Layer_Composite::get_param(param);
 113 }
 114
 115 Layer::Vocab
 116 Layer_Bitmap::get_param_vocab()const
 117 {
 118         Layer::Vocab ret(Layer_Composite::get_param_vocab());
 119
 120         ret.push_back(ParamDesc("tl")
 121                 .set_local_name(_("Top-Left"))
 122                 .set_description(_("Upper left-hand Corner of image"))
 123         );
 124
 125         ret.push_back(ParamDesc("br")
 126                 .set_local_name(_("Bottom-Right"))
 127                 .set_description(_("Lower right-hand Corner of image"))
 128         );
 129
 130         ret.push_back(ParamDesc("c")
 131                 .set_local_name(_("Interpolation"))
 132                 .set_description(_("What type of interpolation to use"))
 133                 .set_hint("enum")
 134                 .add_enum_value(0,"nearest",_("Nearest Neighbor"))
 135                 .add_enum_value(1,"linear",_("Linear"))
 136                 .add_enum_value(2,"cosine",_("Cosine"))
 137                 .add_enum_value(3,"cubic",_("Cubic"))
 138         );
 139
 140         ret.push_back(ParamDesc("gamma_adjust")
 141                 .set_local_name(_("Gamma Adjustment"))
 142         );
 143
 144         return ret;
 145 }
 146
 147 synfig::Layer::Handle
 148 Layer_Bitmap::hit_check(synfig::Context context, const synfig::Point &pos)const
 149 {
 150         Point surface_pos;
 151         surface_pos=pos-tl;
 152
 153         surface_pos[0]/=br[0]-tl[0];
 154         if(surface_pos[0]<=1.0 && surface_pos[0]>=0.0)
 155         {
 156                 surface_pos[1]/=br[1]-tl[1];
 157                 if(surface_pos[1]<=1.0 && surface_pos[1]>=0.0)
 158                 {
 159                         return const_cast<Layer_Bitmap*>(this);
 160                 }
 161         }
 162
 163         return context.hit_check(pos);
 164 }
 165
 166 inline
 167 const Color&
 168 synfig::Layer_Bitmap::filter(const Color& c)const
 169 {
 170         if(gamma_adjust==1.0)
 171                 return c;
 172         static Color x;
 173         x=c;
 174
 175         x.set_r(powf((float)x.get_r(),gamma_adjust));
 176         x.set_g(powf((float)x.get_g(),gamma_adjust));
 177         x.set_b(powf((float)x.get_b(),gamma_adjust));
 178         return x;
 179 }
 180
 181 Color
 182 synfig::Layer_Bitmap::get_color(Context context, const Point &pos)const
 183 {
 184         Point surface_pos;
 185
 186         if(!get_amount())
 187                 return context.get_color(pos);
 188
 189         surface_pos=pos-tl;
 190
 191         surface_pos[0]/=br[0]-tl[0];
 192         if(surface_pos[0]<=1.0 && surface_pos[0]>=0.0)
 193         {
 194                 surface_pos[1]/=br[1]-tl[1];
 195                 if(surface_pos[1]<=1.0 && surface_pos[1]>=0.0)
 196                 {
 197                         if (trimmed)
 198                         {
 199                                 surface_pos[0]*=width;
 200                                 surface_pos[1]*=height;
 201
 202                                 if (surface_pos[0] > left+surface.get_w() || surface_pos[0] < left || surface_pos[1] > top+surface.get_h() || surface_pos[1] < top)
 203                                         return context.get_color(pos);
 204
 205                                 surface_pos[0] -= left;
 206                                 surface_pos[1] -= top;
 207                         }
 208                         else
 209                         {
 210                                 surface_pos[0]*=surface.get_w();
 211                                 surface_pos[1]*=surface.get_h();
 212                         }
 213
 214                         Color ret(Color::alpha());
 215
 216                         switch(c)
 217                         {
 218                         case 6: // Undefined
 219                         case 5: // Undefined
 220                         case 4: // Undefined
 221                         case 3: // Cubic
 222                                 ret=surface.cubic_sample(surface_pos[0],surface_pos[1]);
 223                                 break;
 224
 225                         case 2: // Cosine
 226                                 ret=surface.cosine_sample(surface_pos[0],surface_pos[1]);
 227                                 break;
 228                         case 1: // Linear
 229                                 ret=surface.linear_sample(surface_pos[0],surface_pos[1]);
 230                                 break;
 231                         case 0: // Nearest Neighbor
 232                         default:
 233                                 {
 234                                         int x(min(surface.get_w()-1,max(0,round_to_int(surface_pos[0]))));
 235                                         int y(min(surface.get_h()-1,max(0,round_to_int(surface_pos[1]))));
 236                                         ret= surface[y][x];
 237                                 }
 238                         break;
 239                         }
 240
 241                         ret=filter(ret);
 242
 243                         if(get_amount()==1 && get_blend_method()==Color::BLEND_STRAIGHT)
 244                                 return ret;
 245                         else
 246                                 return Color::blend(ret,context.get_color(pos),get_amount(),get_blend_method());
 247                 }
 248         }
 249
 250         return context.get_color(pos);
 251 }
 252
 253 bool
 254 Layer_Bitmap::accelerated_render(Context context,Surface *out_surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)  const
 255 {
 256         int interp=c;
 257         if(quality>=10)
 258                 interp=0;
 259         else if(quality>=5 && interp>1)
 260                 interp=1;
 261
 262         // We can only handle NN and Linear at the moment
 263         //if(interp>1)
 264         //      return Layer_Composite::accelerated_render(context,out_surface,quality,renddesc,cb);
 265
 266         //if we don't actually have a valid surface just skip us
 267         if(!surface.is_valid())
 268         {
 269                 // Render what is behind us
 270                 return context.accelerated_render(out_surface,quality,renddesc,cb);
 271         }
 272
 273         SuperCallback subcb(cb,1,10000,10001+renddesc.get_h());
 274
 275         if(     get_amount()==1 &&
 276                 get_blend_method()==Color::BLEND_STRAIGHT &&
 277                 !trimmed &&
 278                 renddesc.get_tl()==tl &&
 279                 renddesc.get_br()==br)
 280         {
 281                 // Check for the trivial case
 282                 if(surface.get_w()==renddesc.get_w() && surface.get_h()==renddesc.get_h() && gamma_adjust==1.0f)
 283                 {
 284                         if(cb && !cb->amount_complete(0,100)) return false;
 285                         *out_surface=surface;
 286                         if(cb && !cb->amount_complete(100,100)) return false;
 287                         return true;
 288                 }
 289                 out_surface->set_wh(renddesc.get_w(),renddesc.get_h());
 290         }
 291         else
 292         {
 293                 // Render what is behind us
 294                 if(!context.accelerated_render(out_surface,quality,renddesc,&subcb))
 295                         return false;
 296         }
 297
 298         if(cb && !cb->amount_complete(10000,10001+renddesc.get_h())) return false;
 299
 300         Point   obr     = renddesc.get_br(),
 301                         otl = renddesc.get_tl();
 302
 303         //Vector::value_type pw=renddesc.get_w()/(renddesc.get_br()[0]-renddesc.get_tl()[0]);
 304         //Vector::value_type ph=renddesc.get_h()/(renddesc.get_br()[1]-renddesc.get_tl()[1]);
 305
 306         //A = representation of input (just tl,br)      //just a scaling right now
 307         //B = representation of output (just tl,br)     //just a scaling right now
 308         //sa = scaling for input (0,1) -> (0,w/h)
 309         //sb = scaling for output (0,1) -> (0,w/h)
 310
 311         float   outwf = obr[0] - otl[0];
 312         float   outhf = obr[1] - otl[1];
 313
 314         int             inw = surface.get_w();
 315         int             inh = surface.get_h();
 316
 317         int             outw = renddesc.get_w();
 318         int             outh = renddesc.get_h();
 319
 320         float   inwf, inhf;
 321         Point   itl, ibr;
 322
 323         if (trimmed)
 324         {
 325                 inwf = (br[0] - tl[0])*surface.get_w()/width;
 326                 inhf = (br[1] - tl[1])*surface.get_h()/height;
 327                 itl = Point(tl[0] + (br[0]-tl[0])*left/width,
 328                                         tl[1] + (br[1]-tl[1])*top/height);
 329                 ibr = Point(tl[0] + (br[0]-tl[0])*(left+inw)/width,
 330                                         tl[1] + (br[1]-tl[1])*(top+inh)/height);
 331         }
 332         else
 333         {
 334                 inwf = br[0] - tl[0];
 335                 inhf = br[1] - tl[1];
 336                 itl = tl;
 337                 ibr = br;
 338         }
 339
 340         //need to get the input coords in output space, so we can clip
 341
 342         //get the desired corners of the bitmap (in increasing order) in integers
 343         //floating point corners
 344         float x1f = (itl[0] - otl[0])*outw/outwf;
 345         float x2f = (ibr[0] - otl[0])*outw/outwf;
 346         float y1f = (itl[1] - otl[1])*outh/outhf;
 347         float y2f = (ibr[1] - otl[1])*outh/outhf;
 348
 349         if(x1f > x2f) swap(x1f,x2f);
 350         if(y1f > y2f) swap(y1f,y2f);
 351
 352         int x_start = max(0,(int)floor(x1f));   //probably floor
 353         int x_end       = min(outw,(int)ceil(x2f));     //probably ceil
 354         int y_start = max(0,(int)floor(y1f));   //probably floor
 355         int y_end       = min(outh,(int)ceil(y2f));     //probably ceil
 356
 357         //need to get the x,y,dx,dy values from output space to input, so we can do fast interpolation
 358
 359         //get the starting position in input space... for interpolating
 360
 361         // in int -> out float:
 362         // Sb(B^-1)A(Sa^-1) x
 363         float inx_start = (((x_start/*+0.5f*/)*outwf/outw + otl[0]) - itl[0])*inw/inwf; //may want to bias this (center of pixel)???
 364         float iny_start = (((y_start/*+0.5f*/)*outhf/outh + otl[1]) - itl[1])*inh/inhf; //may want to bias this (center of pixel)???
 365
 366         //calculate the delta values in input space for one pixel movement in output space
 367         //same matrix but with a vector instead of a point...
 368         float indx = outwf*(inw)/((outw)*inwf);         //translations died
 369         float indy = outhf*(inh)/((outh)*inhf);         //translations died
 370
 371         //perhaps use a DDA algorithm... if faster...
 372         //   will still want pixel fractions to be floating point since colors are
 373
 374         //synfig::info("xstart:%d ystart:%d xend:%d yend:%d",x_start,y_start,x_end,y_end);
 375
 376         //start drawing at the start of the bitmap (either origin or corner of input...)
 377         //and get other info
 378         Surface::alpha_pen pen(out_surface->get_pen(x_start,y_start));
 379         pen.set_alpha(get_amount());
 380         pen.set_blend_method(get_blend_method());
 381
 382         //check if we should use the downscale filtering
 383         if(quality <= 7)
 384         {
 385                 //the stride of the value should be inverted because we want to downsample
 386                 //when the stride is small, not big
 387                 //int multw = (int)ceil(indx);
 388                 //int multh = (int)ceil(indy);
 389
 390                 if(indx > 1.7 || indy > 1.7)
 391                 {
 392                         /*synfig::info("Decided to downsample? ratios - (%f,%f) -> (%d,%d)",
 393                                                 indx, indy, multw, multh);      */
 394
 395                         //use sample rect here...
 396
 397                         float iny, inx;
 398                         int x,y;
 399
 400                         //Point sample - truncate
 401                         iny = iny_start;//+0.5f;
 402                         for(y = y_start; y < y_end; ++y, pen.inc_y(), iny += indy)
 403                         {
 404                                 inx = inx_start;//+0.5f;
 405                                 for(x = x_start; x < x_end; x++, pen.inc_x(), inx += indx)
 406                                 {
 407                                         Color rc = surface.sample_rect_clip(inx,iny,inx+indx,iny+indy);
 408                                         pen.put_value(filter(rc));
 409                                 }
 410                                 pen.dec_x(x_end-x_start);
 411                         }
 412
 413                         //Color c = (*out_surface)[0][0];
 414                         //synfig::info("ValueBase of first pixel = (%f,%f,%f,%f)",c.get_r(),c.get_g(),c.get_b(),c.get_a());
 415
 416                         return true;
 417                 }
 418         }
 419
 420         //perform normal interpolation
 421         if(interp==0)
 422         {
 423                 //synfig::info("Decided to do nearest neighbor");
 424                 float iny, inx;
 425                 int x,y;
 426
 427                 //Point sample - truncate
 428                 iny = iny_start;//+0.5f;
 429                 for(y = y_start; y < y_end; y++, pen.inc_y(), iny += indy)
 430                 {
 431                         inx = inx_start;//+0.5f;
 432                         int yclamp = min(inh-1, max(0, round_to_int(iny)));
 433                         for(x = x_start; x < x_end; x++, pen.inc_x(), inx += indx)
 434                         {
 435                                 int xclamp = min(inw-1, max(0, round_to_int(inx)));
 436                                 Color c = filter(surface[yclamp][xclamp]);
 437                                 pen.put_value(c); //must get rid of the clip
 438                         }
 439                         pen.dec_x(x_end-x_start);
 440                 }
 441         }
 442         else
 443         if(interp==1)
 444         {
 445                 //bilinear filtering
 446
 447                 //float         xmf,xpf,ymf,ypf;
 448                 //int           xm,xp,ym,yp;
 449                 float   inx,iny;
 450                 int             x,y;
 451
 452                 //can probably buffer for x values...
 453
 454                 //loop and based on inx,iny sample input image
 455                 iny = iny_start;
 456                 for(y = y_start; y < y_end; y++, pen.inc_y(), iny += indy)
 457                 {
 458                         inx = inx_start;
 459                         for(x = x_start; x < x_end; x++, pen.inc_x(), inx += indx)
 460                         {
 461                                 pen.put_value(filter(surface.linear_sample(inx,iny)));
 462                         }
 463                         pen.dec_x(x_end-x_start);
 464
 465                 }
 466         }
 467         else
 468         if(interp==2)
 469         {
 470                 //cosine filtering
 471
 472                 //float         xmf,xpf,ymf,ypf;
 473                 //int           xm,xp,ym,yp;
 474                 float   inx,iny;
 475                 int             x,y;
 476
 477                 //can probably buffer for x values...
 478
 479                 //loop and based on inx,iny sample input image
 480                 iny = iny_start;
 481                 for(y = y_start; y < y_end; y++, pen.inc_y(), iny += indy)
 482                 {
 483                         inx = inx_start;
 484                         for(x = x_start; x < x_end; x++, pen.inc_x(), inx += indx)
 485                         {
 486                                 pen.put_value(filter(surface.cosine_sample(inx,iny)));
 487                         }
 488                         pen.dec_x(x_end-x_start);
 489
 490                 }
 491         }
 492         else
 493         {
 494                 //cubic filtering
 495
 496                 //float         xmf,xpf,ymf,ypf;
 497                 //int           xm,xp,ym,yp;
 498                 float   inx,iny;
 499                 int             x,y;
 500
 501                 //can probably buffer for x values...
 502
 503                 //loop and based on inx,iny sample input image
 504                 iny = iny_start;
 505                 for(y = y_start; y < y_end; y++, pen.inc_y(), iny += indy)
 506                 {
 507                         inx = inx_start;
 508                         for(x = x_start; x < x_end; x++, pen.inc_x(), inx += indx)
 509                         {
 510                                 pen.put_value(filter(surface.cubic_sample(inx,iny)));
 511                         }
 512                         pen.dec_x(x_end-x_start);
 513
 514                 }
 515         }
 516
 517         return true;
 518 }
 519
 520 Rect
 521 Layer_Bitmap::get_bounding_rect()const
 522 {
 523         return Rect(tl,br);
 524 }