synfig-core/trunk/src/modules/lyr_freetype/lyr_freetype.cpp

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file lyr_freetype.cpp
   3 **      \brief Template Header
   4 **
   5 **      \legal
   6 **      Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
   7 **      Copyright (c) 2006 Paul Wise
   8 **
   9 **      This package is free software; you can redistribute it and/or
  10 **      modify it under the terms of the GNU General Public License as
  11 **      published by the Free Software Foundation; either version 2 of
  12 **      the License, or (at your option) any later version.
  13 **
  14 **      This package is distributed in the hope that it will be useful,
  15 **      but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 **      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  17 **      General Public License for more details.
  18 **      \endlegal
  19 **
  20 ** === N O T E S ===========================================================
  21 **
  22 ** ========================================================================= */
  23
  24 /* === H E A D E R S ======================================================= */
  25
  26 #define SYNFIG_LAYER
  27
  28 #ifdef USING_PCH
  29 #       include "pch.h"
  30 #else
  31 #ifdef HAVE_CONFIG_H
  32 #       include <config.h>
  33 #endif
  34 #ifdef WITH_FONTCONFIG
  35 #include <fontconfig/fontconfig.h>
  36 #endif
  37
  38 #include "lyr_freetype.h"
  39
  40
  41 #endif
  42
  43 using namespace std;
  44 using namespace etl;
  45 using namespace synfig;
  46
  47 /* === M A C R O S ========================================================= */
  48
  49 #define MAX_GLYPHS              2000
  50
  51 #define PANGO_STYLE_NORMAL (0)
  52 #define PANGO_STYLE_OBLIQUE (1)
  53 #define PANGO_STYLE_ITALIC (2)
  54
  55
  56 #define WEIGHT_NORMAL (400)
  57 #define WEIGHT_BOLD (700)
  58
  59 /* === G L O B A L S ======================================================= */
  60
  61 SYNFIG_LAYER_INIT(lyr_freetype);
  62 SYNFIG_LAYER_SET_NAME(lyr_freetype,"text");
  63 SYNFIG_LAYER_SET_LOCAL_NAME(lyr_freetype,_("Simple Text"));
  64 SYNFIG_LAYER_SET_CATEGORY(lyr_freetype,_("Typography"));
  65 SYNFIG_LAYER_SET_VERSION(lyr_freetype,"0.2");
  66 SYNFIG_LAYER_SET_CVS_ID(lyr_freetype,"$Id: lyr_freetype.cpp,v 1.5 2005/01/24 05:00:18 darco Exp $");
  67
  68 /* === P R O C E D U R E S ================================================= */
  69
  70 /*Glyph::~Glyph()
  71 {
  72         if(glyph)FT_Done_Glyph(glyph);
  73 }
  74 */
  75 void
  76 TextLine::clear_and_free()
  77 {
  78         std::vector<Glyph>::iterator iter;
  79         for(iter=glyph_table.begin();iter!=glyph_table.end();++iter)
  80         {
  81                 if(iter->glyph)FT_Done_Glyph(iter->glyph);
  82                 iter->glyph=0;
  83         }
  84         glyph_table.clear();
  85 }
  86
  87 /* === M E T H O D S ======================================================= */
  88
  89 lyr_freetype::lyr_freetype()
  90 {
  91         face=0;
  92
  93         size=Vector(0.25,0.25);
  94         text=_("Text Layer");
  95         color=Color::black();
  96         pos=Vector(0,0);
  97         orient=Vector(0.5,0.5);
  98         compress=1.0;
  99         vcompress=1.0;
 100         weight=WEIGHT_NORMAL;
 101         style=PANGO_STYLE_NORMAL;
 102         family="Sans Serif";
 103         use_kerning=true;
 104         grid_fit=false;
 105         old_version=false;
 106         set_blend_method(Color::BLEND_COMPOSITE);
 107         needs_sync_=true;
 108
 109         new_font(family,style,weight);
 110
 111         invert=false;
 112 }
 113
 114 lyr_freetype::~lyr_freetype()
 115 {
 116         if(face)
 117                 FT_Done_Face(face);
 118 }
 119
 120 void
 121 lyr_freetype::new_font(const synfig::String &family, int style, int weight)
 122 {
 123         if(
 124                 !new_font_(family,style,weight) &&
 125                 !new_font_(family,style,WEIGHT_NORMAL) &&
 126                 !new_font_(family,PANGO_STYLE_NORMAL,weight) &&
 127                 !new_font_(family,PANGO_STYLE_NORMAL,WEIGHT_NORMAL) &&
 128                 !new_font_("sans serif",style,weight) &&
 129                 !new_font_("sans serif",style,WEIGHT_NORMAL) &&
 130                 !new_font_("sans serif",PANGO_STYLE_NORMAL,weight)
 131         )
 132                 new_font_("sans serif",PANGO_STYLE_NORMAL,WEIGHT_NORMAL);
 133 }
 134
 135 bool
 136 lyr_freetype::new_font_(const synfig::String &font_fam_, int style, int weight)
 137 {
 138         synfig::String font_fam(font_fam_);
 139
 140         if(new_face(font_fam_))
 141                 return true;
 142
 143         //start evil hack
 144         for(unsigned int i=0;i<font_fam.size();i++)font_fam[i]=tolower(font_fam[i]);
 145         //end evil hack
 146
 147         if(font_fam=="arial black")
 148 #ifndef __APPLE__
 149         if(new_face("ariblk"))
 150                         return true;
 151                 else
 152 #endif
 153                 font_fam="sans serif";
 154
 155         if(font_fam=="sans serif" || font_fam=="arial")
 156         {
 157                 String arial("arial");
 158                 if(weight>WEIGHT_NORMAL)
 159                         arial+='b';
 160                 if(style==PANGO_STYLE_ITALIC||style==PANGO_STYLE_OBLIQUE)
 161                         arial+='i';
 162                 else
 163                         if(weight>WEIGHT_NORMAL) arial+='d';
 164
 165                 if(new_face(arial))
 166                         return true;
 167 #ifdef __APPLE__
 168                 if(new_face("Helvetica RO"))
 169                         return true;
 170 #endif
 171         }
 172
 173         if(font_fam=="comic" || font_fam=="comic sans")
 174         {
 175                 String filename("comic");
 176                 if(weight>WEIGHT_NORMAL)
 177                         filename+='b';
 178                 if(style==PANGO_STYLE_ITALIC||style==PANGO_STYLE_OBLIQUE)
 179                         filename+='i';
 180                 else if(weight>WEIGHT_NORMAL) filename+='d';
 181
 182                 if(new_face(filename))
 183                         return true;
 184         }
 185
 186         if(font_fam=="courier" || font_fam=="courier new")
 187         {
 188                 String filename("cour");
 189                 if(weight>WEIGHT_NORMAL)
 190                         filename+='b';
 191                 if(style==PANGO_STYLE_ITALIC||style==PANGO_STYLE_OBLIQUE)
 192                         filename+='i';
 193                 else if(weight>WEIGHT_NORMAL) filename+='d';
 194
 195                 if(new_face(filename))
 196                         return true;
 197         }
 198
 199         if(font_fam=="serif" || font_fam=="times" || font_fam=="times new roman")
 200         {
 201                 String filename("times");
 202                 if(weight>WEIGHT_NORMAL)
 203                         filename+='b';
 204                 if(style==PANGO_STYLE_ITALIC||style==PANGO_STYLE_OBLIQUE)
 205                         filename+='i';
 206                 else if(weight>WEIGHT_NORMAL) filename+='d';
 207
 208                 if(new_face(filename))
 209                         return true;
 210         }
 211
 212         if(font_fam=="trebuchet")
 213         {
 214                 String filename("trebuc");
 215                 if(weight>WEIGHT_NORMAL)
 216                         filename+='b';
 217                 if(style==PANGO_STYLE_ITALIC||style==PANGO_STYLE_OBLIQUE)
 218                 {
 219                         filename+='i';
 220                         if(weight<=WEIGHT_NORMAL) filename+='t';
 221                 }
 222                 else if(weight>WEIGHT_NORMAL) filename+='d';
 223
 224                 if(new_face(filename))
 225                         return true;
 226         }
 227
 228
 229         if(font_fam=="sans serif" || font_fam=="luxi sans")
 230         {
 231                 {
 232                         String luxi("luxis");
 233                         if(weight>WEIGHT_NORMAL)
 234                                 luxi+='b';
 235                         else
 236                                 luxi+='r';
 237                         if(style==PANGO_STYLE_ITALIC||style==PANGO_STYLE_OBLIQUE)
 238                                 luxi+='i';
 239
 240
 241                         if(new_face(luxi))
 242                                 return true;
 243                 }
 244                 if(new_face("arial"))
 245                         return true;
 246                 if(new_face("Arial"))
 247                         return true;
 248         }
 249         if(font_fam=="serif" || font_fam=="times" || font_fam=="times new roman" || font_fam=="luxi serif")
 250         {
 251                 {
 252                         String luxi("luxir");
 253                         if(weight>WEIGHT_NORMAL)
 254                                 luxi+='b';
 255                         else
 256                                 luxi+='r';
 257                         if(style==PANGO_STYLE_ITALIC||style==PANGO_STYLE_OBLIQUE)
 258                                 luxi+='i';
 259
 260                         if(new_face(luxi))
 261                                 return true;
 262                 }
 263                 if(new_face("Times New Roman"))
 264                         return true;
 265                 if(new_face("Times"))
 266                         return true;
 267         }
 268         if(font_fam=="luxi")
 269         {
 270                 {
 271                         String luxi("luxim");
 272                         if(weight>WEIGHT_NORMAL)
 273                                 luxi+='b';
 274                         else
 275                                 luxi+='r';
 276                         if(style==PANGO_STYLE_ITALIC||style==PANGO_STYLE_OBLIQUE)
 277                                 luxi+='i';
 278
 279                         if(new_face(luxi))
 280                                 return true;
 281                 }
 282
 283                 if(new_face("Times New Roman"))
 284                         return true;
 285                 if(new_face("Times"))
 286                         return true;
 287         }
 288
 289         return new_face(font_fam_) || new_face(font_fam);
 290
 291         return false;
 292 }
 293
 294 #ifdef USE_MAC_FT_FUNCS
 295 void fss2path(char *path, FSSpec *fss)
 296 {
 297   int l;             //fss->name contains name of last item in path
 298   for(l=0; l<(fss->name[0]); l++) path[l] = fss->name[l + 1];
 299   path[l] = 0;
 300
 301   if(fss->parID != fsRtParID) //path is more than just a volume name
 302   {
 303     int i, len;
 304     CInfoPBRec pb;
 305
 306     pb.dirInfo.ioNamePtr = fss->name;
 307     pb.dirInfo.ioVRefNum = fss->vRefNum;
 308     pb.dirInfo.ioDrParID = fss->parID;
 309     do
 310     {
 311       pb.dirInfo.ioFDirIndex = -1;  //get parent directory name
 312       pb.dirInfo.ioDrDirID = pb.dirInfo.ioDrParID;
 313       if(PBGetCatInfoSync(&pb) != noErr) break;
 314
 315       len = fss->name[0] + 1;
 316       for(i=l; i>=0;  i--) path[i + len] = path[i];
 317       for(i=1; i<len; i++) path[i - 1] = fss->name[i]; //add to start of path
 318       path[i - 1] = ':';
 319       l += len;
 320 } while(pb.dirInfo.ioDrDirID != fsRtDirID); //while more directory levels
 321   }
 322 }
 323 #endif
 324
 325 bool
 326 lyr_freetype::new_face(const String &newfont)
 327 {
 328         int error;
 329         FT_Long face_index=0;
 330
 331         // If we are already loaded, don't bother reloading.
 332         if(face && font==newfont)
 333                 return true;
 334
 335         if(face)
 336         {
 337                 FT_Done_Face(face);
 338                 face=0;
 339         }
 340
 341         error=FT_New_Face(ft_library,newfont.c_str(),face_index,&face);
 342         if(error)error=FT_New_Face(ft_library,(newfont+".ttf").c_str(),face_index,&face);
 343
 344         if(get_canvas())
 345         {
 346                 if(error)error=FT_New_Face(ft_library,(get_canvas()->get_file_path()+ETL_DIRECTORY_SEPERATOR+newfont).c_str(),face_index,&face);
 347                 if(error)error=FT_New_Face(ft_library,(get_canvas()->get_file_path()+ETL_DIRECTORY_SEPERATOR+newfont+".ttf").c_str(),face_index,&face);
 348         }
 349
 350 #ifdef USE_MAC_FT_FUNCS
 351         if(error)
 352         {
 353                 FSSpec fs_spec;
 354                 error=FT_GetFile_From_Mac_Name(newfont.c_str(),&fs_spec,&face_index);
 355                 if(!error)
 356                 {
 357                         char filename[512];
 358                         fss2path(filename,&fs_spec);
 359                         //FSSpecToNativePathName(fs_spec,filename,sizeof(filename)-1, 0);
 360
 361                         error=FT_New_Face(ft_library, filename, face_index,&face);
 362                         //error=FT_New_Face_From_FSSpec(ft_library, &fs_spec, face_index,&face);
 363                         synfig::info(__FILE__":%d: \"%s\" (%s) -- ft_error=%d",__LINE__,newfont.c_str(),filename,error);
 364                 }
 365                 else
 366                 {
 367                         synfig::info(__FILE__":%d: \"%s\" -- ft_error=%d",__LINE__,newfont.c_str(),error);
 368                         // Unable to generate fs_spec
 369                 }
 370
 371         }
 372 #endif
 373
 374 #ifdef WITH_FONTCONFIG
 375         if(error)
 376         {
 377                 FcFontSet *fs;
 378                 FcResult result;
 379                 if( !FcInit() )
 380                 {
 381                         synfig::warning("lyr_freetype: fontconfig: %s",_("unable to initialise"));
 382                         error = 1;
 383                 } else {
 384                         FcPattern* pat = FcNameParse((FcChar8 *) newfont.c_str());
 385                         FcConfigSubstitute(0, pat, FcMatchPattern);
 386                         FcDefaultSubstitute(pat);
 387                         FcPattern *match;
 388                         fs = FcFontSetCreate();
 389                         match = FcFontMatch(0, pat, &result);
 390                         if (match)
 391                                 FcFontSetAdd(fs, match);
 392                         if (pat)
 393                                 FcPatternDestroy(pat);
 394                         if(fs){
 395                                 FcChar8* file;
 396                                 if( FcPatternGetString (fs->fonts[0], FC_FILE, 0, &file) == FcResultMatch )
 397                                         error=FT_New_Face(ft_library,(const char*)file,face_index,&face);
 398                                 FcFontSetDestroy(fs);
 399                         } else
 400                                 synfig::warning("lyr_freetype: fontconfig: %s",_("empty font set"));
 401                 }
 402         }
 403 #endif
 404
 405 #ifdef WIN32
 406         if(error)error=FT_New_Face(ft_library,("C:\\WINDOWS\\FONTS\\"+newfont).c_str(),face_index,&face);
 407         if(error)error=FT_New_Face(ft_library,("C:\\WINDOWS\\FONTS\\"+newfont+".ttf").c_str(),face_index,&face);
 408 #else
 409
 410 #ifdef __APPLE__
 411         if(error)error=FT_New_Face(ft_library,("~/Library/Fonts/"+newfont).c_str(),face_index,&face);
 412         if(error)error=FT_New_Face(ft_library,("~/Library/Fonts/"+newfont+".ttf").c_str(),face_index,&face);
 413         if(error)error=FT_New_Face(ft_library,("~/Library/Fonts/"+newfont+".dfont").c_str(),face_index,&face);
 414
 415         if(error)error=FT_New_Face(ft_library,("/Library/Fonts/"+newfont).c_str(),face_index,&face);
 416         if(error)error=FT_New_Face(ft_library,("/Library/Fonts/"+newfont+".ttf").c_str(),face_index,&face);
 417         if(error)error=FT_New_Face(ft_library,("/Library/Fonts/"+newfont+".dfont").c_str(),face_index,&face);
 418 #endif
 419
 420         if(error)error=FT_New_Face(ft_library,("/usr/X11R6/lib/X11/fonts/type1/"+newfont).c_str(),face_index,&face);
 421         if(error)error=FT_New_Face(ft_library,("/usr/X11R6/lib/X11/fonts/type1/"+newfont+".ttf").c_str(),face_index,&face);
 422
 423         if(error)error=FT_New_Face(ft_library,("/usr/share/fonts/truetype/"+newfont).c_str(),face_index,&face);
 424         if(error)error=FT_New_Face(ft_library,("/usr/share/fonts/truetype/"+newfont+".ttf").c_str(),face_index,&face);
 425
 426         if(error)error=FT_New_Face(ft_library,("/usr/X11R6/lib/X11/fonts/TTF/"+newfont).c_str(),face_index,&face);
 427         if(error)error=FT_New_Face(ft_library,("/usr/X11R6/lib/X11/fonts/TTF/"+newfont+".ttf").c_str(),face_index,&face);
 428
 429         if(error)error=FT_New_Face(ft_library,("/usr/X11R6/lib/X11/fonts/truetype/"+newfont).c_str(),face_index,&face);
 430         if(error)error=FT_New_Face(ft_library,("/usr/X11R6/lib/X11/fonts/truetype/"+newfont+".ttf").c_str(),face_index,&face);
 431
 432 #endif
 433         if(error)
 434         {
 435                 //synfig::error(strprintf("lyr_freetype:%s (err=%d)",_("Unable to open face."),error));
 436                 return false;
 437         }
 438
 439         font=newfont;
 440
 441         needs_sync_=true;
 442         return true;
 443 }
 444
 445 bool
 446 lyr_freetype::set_param(const String & param, const ValueBase &value)
 447 {
 448         Mutex::Lock lock(mutex);
 449 /*
 450         if(param=="font" && value.same_as(font))
 451         {
 452                 new_font(etl::basename(value.get(font)),style,weight);
 453                 family=etl::basename(value.get(font));
 454                 return true;
 455         }
 456 */
 457         IMPORT_PLUS(family,new_font(family,style,weight));
 458         IMPORT_PLUS(weight,new_font(family,style,weight));
 459         IMPORT_PLUS(style,new_font(family,style,weight));
 460         IMPORT_PLUS(size, if(old_version){size/=2.0;} needs_sync_=true );
 461         IMPORT_PLUS(text,needs_sync_=true);
 462         IMPORT_PLUS(pos,needs_sync_=true);
 463         IMPORT(color);
 464         IMPORT(invert);
 465         IMPORT_PLUS(orient,needs_sync_=true);
 466         IMPORT_PLUS(compress,needs_sync_=true);
 467         IMPORT_PLUS(vcompress,needs_sync_=true);
 468         IMPORT_PLUS(use_kerning,needs_sync_=true);
 469         IMPORT_PLUS(grid_fit,needs_sync_=true);
 470
 471         return Layer_Composite::set_param(param,value);
 472 }
 473
 474 ValueBase
 475 lyr_freetype::get_param(const String& param)const
 476 {
 477         EXPORT(font);
 478         EXPORT(family);
 479         EXPORT(style);
 480         EXPORT(weight);
 481         EXPORT(size);
 482         EXPORT(text);
 483         EXPORT(color);
 484         EXPORT(pos);
 485         EXPORT(orient);
 486         EXPORT(compress);
 487         EXPORT(vcompress);
 488         EXPORT(use_kerning);
 489         EXPORT(grid_fit);
 490         EXPORT(invert);
 491
 492         EXPORT_NAME();
 493         EXPORT_VERSION();
 494
 495         return Layer_Composite::get_param(param);
 496 }
 497
 498 Layer::Vocab
 499 lyr_freetype::get_param_vocab(void)const
 500 {
 501         Layer::Vocab ret(Layer_Composite::get_param_vocab());
 502
 503         ret.push_back(ParamDesc("text")
 504                 .set_local_name(_("Text"))
 505                 .set_description(_("Text to Render"))
 506                 .set_hint("paragraph")
 507         );
 508
 509         ret.push_back(ParamDesc("color")
 510                 .set_local_name(_("Color"))
 511                 .set_description(_("Color of the text"))
 512         );
 513
 514         ret.push_back(ParamDesc("family")
 515                 .set_local_name(_("Font Family"))
 516                 .set_hint("font_family")
 517         );
 518
 519         ret.push_back(ParamDesc("style")
 520                 .set_local_name(_("Style"))
 521                 .set_hint("enum")
 522                 .add_enum_value(PANGO_STYLE_NORMAL, "normal" ,_("Normal"))
 523                 .add_enum_value(PANGO_STYLE_OBLIQUE, "oblique" ,_("Oblique"))
 524                 .add_enum_value(PANGO_STYLE_ITALIC, "italic" ,_("Italic"))
 525         );
 526
 527         ret.push_back(ParamDesc("weight")
 528                 .set_local_name(_("Weight"))
 529                 .set_hint("enum")
 530                 .add_enum_value(200, "ultralight" ,_("Ultralight"))
 531                 .add_enum_value(300, "light" ,_("light"))
 532                 .add_enum_value(400, "normal" ,_("Normal"))
 533                 .add_enum_value(700, "bold" ,_("Bold"))
 534                 .add_enum_value(800, "ultrabold" ,_("Ultrabold"))
 535                 .add_enum_value(900, "heavy" ,_("Heavy"))
 536         );
 537         ret.push_back(ParamDesc("compress")
 538                 .set_local_name(_("Hozontal Spacing"))
 539                 .set_description(_("Describes how close glyphs are horizontally"))
 540         );
 541
 542         ret.push_back(ParamDesc("vcompress")
 543                 .set_local_name(_("Vertical Spacing"))
 544                 .set_description(_("Describes how close lines of text are vertically"))
 545         );
 546
 547         ret.push_back(ParamDesc("size")
 548                 .set_local_name(_("Size"))
 549                 .set_description(_("Size of the text"))
 550                 .set_hint("size")
 551                 .set_origin("pos")
 552                 .set_scalar(1)
 553         );
 554
 555         ret.push_back(ParamDesc("orient")
 556                 .set_local_name(_("Orientation"))
 557                 .set_description(_("Text Orientation"))
 558                 .set_invisible_duck()
 559         );
 560
 561         ret.push_back(ParamDesc("pos")
 562                 .set_local_name(_("Position"))
 563                 .set_description(_("Text Position"))
 564         );
 565
 566         ret.push_back(ParamDesc("font")
 567                 .set_local_name(_("Font"))
 568                 .set_description(_("Filename of the font to use"))
 569                 .set_hint("filename")
 570                 .not_critical()
 571                 .hidden()
 572         );
 573
 574         ret.push_back(ParamDesc("use_kerning")
 575                 .set_local_name(_("Kerning"))
 576                 .set_description(_("Enables/Disables font kerning (If the font supports it)"))
 577         );
 578
 579         ret.push_back(ParamDesc("grid_fit")
 580                 .set_local_name(_("Sharpen Edges"))
 581                 .set_description(_("Turn this off if you are going to be animating the text"))
 582         );
 583         ret.push_back(ParamDesc("invert")
 584                 .set_local_name(_("Invert"))
 585         );
 586         return ret;
 587 }
 588
 589 void
 590 lyr_freetype::sync()
 591 {
 592         needs_sync_=false;
 593
 594
 595
 596
 597 }
 598
 599 Color
 600 lyr_freetype::get_color(Context context, const synfig::Point &pos)const
 601 {
 602         if(needs_sync_)
 603                 const_cast<lyr_freetype*>(this)->sync();
 604
 605         if(!face)
 606                 return context.get_color(pos);
 607         return context.get_color(pos);
 608 }
 609
 610 bool
 611 lyr_freetype::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
 612 {
 613         static synfig::RecMutex freetype_mutex;
 614
 615         if(needs_sync_)
 616                 const_cast<lyr_freetype*>(this)->sync();
 617
 618
 619
 620
 621         int error;
 622         Vector size(lyr_freetype::size*2);
 623
 624         if(!context.accelerated_render(surface,quality,renddesc,cb))
 625                 return false;
 626
 627         if(is_disabled() || text.empty())
 628                 return true;
 629
 630         // If there is no font loaded, just bail
 631         if(!face)
 632         {
 633                 if(cb)cb->warning(string("lyr_freetype:")+_("No face loaded, no text will be rendered."));
 634                 return true;
 635         }
 636
 637         String text(lyr_freetype::text);
 638         if(text=="@_FILENAME_@" && get_canvas() && !get_canvas()->get_file_name().empty())
 639         {
 640                 text=basename(get_canvas()->get_file_name());
 641         }
 642
 643         // Width and Height of a pixel
 644         Vector::value_type pw=renddesc.get_w()/(renddesc.get_br()[0]-renddesc.get_tl()[0]);
 645         Vector::value_type ph=renddesc.get_h()/(renddesc.get_br()[1]-renddesc.get_tl()[1]);
 646
 647     // Calculate character width and height
 648         int w=abs(round_to_int(size[0]*pw));
 649         int h=abs(round_to_int(size[1]*ph));
 650
 651     //int bx=(int)((pos[0]-renddesc.get_tl()[0])*pw*64+0.5);
 652     //int by=(int)((pos[1]-renddesc.get_tl()[1])*ph*64+0.5);
 653     int bx=0;
 654     int by=0;
 655
 656     // If the font is the size of a pixel, don't bother rendering any text
 657         if(w<=1 || h<=1)
 658         {
 659                 if(cb)cb->warning(string("lyr_freetype:")+_("Text too small, no text will be rendered."));
 660                 return true;
 661         }
 662
 663         synfig::RecMutex::Lock lock(freetype_mutex);
 664
 665 #define CHAR_RESOLUTION         (64)
 666         error = FT_Set_Char_Size(
 667                 face,                                           // handle to face object
 668                 (int)CHAR_RESOLUTION,   // char_width in 1/64th of points
 669                 (int)CHAR_RESOLUTION,   // char_height in 1/64th of points
 670                 round_to_int(abs(size[0]*pw*CHAR_RESOLUTION)),                                          // horizontal device resolution
 671                 round_to_int(abs(size[1]*ph*CHAR_RESOLUTION)) );                                                // vertical device resolution
 672
 673         // Here is where we can compensate for the
 674         // error in freetype's rendering engine.
 675         const float xerror(abs(size[0]*pw)/(float)face->size->metrics.x_ppem/1.13f/0.996);
 676         const float yerror(abs(size[1]*ph)/(float)face->size->metrics.y_ppem/1.13f/0.996);
 677         //synfig::info("xerror=%f, yerror=%f",xerror,yerror);
 678         const float compress(lyr_freetype::compress*xerror);
 679         const float vcompress(lyr_freetype::vcompress*yerror);
 680
 681         if(error)
 682         {
 683                 if(cb)cb->warning(string("lyr_freetype:")+_("Unable to set face size.")+strprintf(" (err=%d)",error));
 684         }
 685
 686         FT_GlyphSlot  slot = face->glyph;  // a small shortcut
 687         FT_UInt       glyph_index(0);
 688         FT_UInt       previous(0);
 689         int u,v;
 690
 691         std::list<TextLine> lines;
 692
 693         /*
 694  --     ** -- CREATE GLYPHS -------------------------------------------------------
 695         */
 696
 697         lines.push_front(TextLine());
 698         string::const_iterator iter;
 699         for (iter=text.begin(); iter!=text.end(); ++iter)
 700         {
 701                 int multiplier(1);
 702                 if(*iter=='\n')
 703                 {
 704                         lines.push_front(TextLine());
 705                         bx=0;
 706                         by=0;
 707                         previous=0;
 708                         continue;
 709                 }
 710                 if(*iter=='\t')
 711                 {
 712                         multiplier=8;
 713                         glyph_index = FT_Get_Char_Index( face, ' ' );
 714                 }
 715                 else
 716                         glyph_index = FT_Get_Char_Index( face, *iter );
 717
 718         // retrieve kerning distance and move pen position
 719                 if ( FT_HAS_KERNING(face) && use_kerning && previous && glyph_index )
 720                 {
 721                         FT_Vector  delta;
 722
 723                         if(grid_fit)
 724                                 FT_Get_Kerning( face, previous, glyph_index, ft_kerning_default, &delta );
 725                         else
 726                                 FT_Get_Kerning( face, previous, glyph_index, ft_kerning_unfitted, &delta );
 727
 728                         if(compress<1.0f)
 729                         {
 730                                 bx += round_to_int(delta.x*compress);
 731                                 by += round_to_int(delta.y*compress);
 732                         }
 733                         else
 734                         {
 735                                 bx += delta.x;
 736                                 by += delta.y;
 737                         }
 738         }
 739
 740                 Glyph curr_glyph;
 741
 742         // store current pen position
 743         curr_glyph.pos.x = bx;
 744         curr_glyph.pos.y = by;
 745
 746         // load glyph image into the slot. DO NOT RENDER IT !!
 747         if(grid_fit)
 748                         error = FT_Load_Glyph( face, glyph_index, FT_LOAD_DEFAULT);
 749                 else
 750                         error = FT_Load_Glyph( face, glyph_index, FT_LOAD_DEFAULT|FT_LOAD_NO_HINTING );
 751         if (error) continue;  // ignore errors, jump to next glyph
 752
 753         // extract glyph image and store it in our table
 754         error = FT_Get_Glyph( face->glyph, &curr_glyph.glyph );
 755         if (error) continue;  // ignore errors, jump to next glyph
 756
 757         // record current glyph index
 758         previous = glyph_index;
 759
 760                 // Update the line width
 761                 lines.front().width=bx+slot->advance.x;
 762
 763                 // increment pen position
 764                 if(multiplier>1)
 765                         bx += round_to_int(slot->advance.x*multiplier*compress)-bx%round_to_int(slot->advance.x*multiplier*compress);
 766                 else
 767                         bx += round_to_int(slot->advance.x*compress*multiplier);
 768
 769                 //bx += round_to_int(slot->advance.x*compress*multiplier);
 770                 //by += round_to_int(slot->advance.y*compress);
 771                 by += slot->advance.y*multiplier;
 772
 773                 lines.front().glyph_table.push_back(curr_glyph);
 774
 775         }
 776
 777
 778         //float string_height;
 779         //string_height=(((lines.size()-1)*face->size->metrics.height+lines.back().actual_height()));
 780
 781         //int string_height=face->size->metrics.ascender;
 782 //#define METRICS_SCALE_ONE             (65536.0f)
 783 #define METRICS_SCALE_ONE               ((float)(1<<16))
 784
 785         float line_height;
 786         line_height=vcompress*((float)face->height*(((float)face->size->metrics.y_scale/METRICS_SCALE_ONE)));
 787
 788         int     string_height;
 789         string_height=round_to_int(((lines.size()-1)*line_height+lines.back().actual_height()));
 790         //synfig::info("string_height=%d",string_height);
 791         //synfig::info("line_height=%f",line_height);
 792
 793         /*
 794  --     ** -- RENDER THE GLYPHS ---------------------------------------------------
 795         */
 796
 797         Surface src_;
 798         Surface *src_surface;
 799
 800         src_surface=surface;
 801
 802         if(invert)
 803         {
 804                 src_=*surface;
 805                 Surface::alpha_pen pen(surface->begin(),get_amount(),get_blend_method());
 806
 807                 surface->fill(color,pen,src_.get_w(),src_.get_h());
 808
 809                 src_surface=&src_;
 810         }
 811
 812         {
 813         std::list<TextLine>::iterator iter;
 814         int curr_line;
 815         for(curr_line=0,iter=lines.begin();iter!=lines.end();++iter,curr_line++)
 816         {
 817                 bx=round_to_int((pos[0]-renddesc.get_tl()[0])*pw*CHAR_RESOLUTION-orient[0]*iter->width);
 818                 by=round_to_int((pos[1]-renddesc.get_tl()[1])*ph*CHAR_RESOLUTION+(1.0-orient[1])*string_height-line_height*curr_line);
 819                 //by=round_to_int(vcompress*((pos[1]-renddesc.get_tl()[1])*ph*64+(1.0-orient[1])*string_height-face->size->metrics.height*curr_line));
 820                 //synfig::info("curr_line=%d, bx=%d, by=%d",curr_line,bx,by);
 821
 822                 std::vector<Glyph>::iterator iter2;
 823                 for(iter2=iter->glyph_table.begin();iter2!=iter->glyph_table.end();++iter2)
 824                 {
 825                         FT_Glyph  image(iter2->glyph);
 826                         FT_Vector pen;
 827                         FT_BitmapGlyph  bit;
 828
 829                         pen.x = bx + iter2->pos.x;
 830                         pen.y = by + iter2->pos.y;
 831
 832                         //synfig::info("GLYPH: pen.x=%d, pen,y=%d",curr_line,(pen.x+32)>>6,(pen.y+32)>>6);
 833
 834                         error = FT_Glyph_To_Bitmap( &image, ft_render_mode_normal,0/*&pen*/, 1 );
 835                         if(error) { FT_Done_Glyph( image ); continue; }
 836
 837                         bit = (FT_BitmapGlyph)image;
 838
 839                         for(v=0;v<bit->bitmap.rows;v++)
 840                                 for(u=0;u<bit->bitmap.width;u++)
 841                                 {
 842                                         int x=u+((pen.x+32)>>6)+ bit->left;
 843                                         int y=v+((pen.y+32)>>6)- bit->top;
 844                                         if(     y>=0 &&
 845                                                 x>=0 &&
 846                                                 y<surface->get_h() &&
 847                                                 x<surface->get_w())
 848                                         {
 849                                                 float myamount=(float)bit->bitmap.buffer[v*bit->bitmap.pitch+u]/255.0f;
 850                                                 if(invert)
 851                                                         myamount=1.0f-myamount;
 852                                                 (*surface)[y][x]=Color::blend(color,(*src_surface)[y][x],myamount*get_amount(),get_blend_method());
 853                                         }
 854                                 }
 855
 856                         FT_Done_Glyph( image );
 857                 }
 858                 //iter->clear_and_free();
 859         }
 860         }
 861
 862
 863         return true;
 864 }
 865
 866 synfig::Rect
 867 lyr_freetype::get_bounding_rect()const
 868 {
 869         if(needs_sync_)
 870                 const_cast<lyr_freetype*>(this)->sync();
 871 //      if(!is_disabled())
 872                 return synfig::Rect::full_plane();
 873 }