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

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file lyr_freetype.cpp
   3 **      \brief Implementation of the "Text" layer
   4 **
   5 **      $Id$
   6 **
   7 **      \legal
   8 **      Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
   9 **      Copyright (c) 2006 Paul Wise
  10 **      Copyright (c) 2007 Chris Moore
  11 **
  12 **      This package is free software; you can redistribute it and/or
  13 **      modify it under the terms of the GNU General Public License as
  14 **      published by the Free Software Foundation; either version 2 of
  15 **      the License, or (at your option) any later version.
  16 **
  17 **      This package is distributed in the hope that it will be useful,
  18 **      but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 **      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  20 **      General Public License for more details.
  21 **      \endlegal
  22 **
  23 ** === N O T E S ===========================================================
  24 **
  25 ** ========================================================================= */
  26
  27 /* === H E A D E R S ======================================================= */
  28
  29 #define SYNFIG_LAYER
  30
  31 #ifdef USING_PCH
  32 #       include "pch.h"
  33 #else
  34 #ifdef HAVE_CONFIG_H
  35 #       include <config.h>
  36 #endif
  37 #ifdef WITH_FONTCONFIG
  38 #include <fontconfig/fontconfig.h>
  39 #endif
  40
  41 #include "lyr_freetype.h"
  42
  43
  44 #endif
  45
  46 using namespace std;
  47 using namespace etl;
  48 using namespace synfig;
  49
  50 /* === M A C R O S ========================================================= */
  51
  52 #define MAX_GLYPHS              2000
  53
  54 #define PANGO_STYLE_NORMAL (0)
  55 #define PANGO_STYLE_OBLIQUE (1)
  56 #define PANGO_STYLE_ITALIC (2)
  57
  58
  59 #define WEIGHT_NORMAL (400)
  60 #define WEIGHT_BOLD (700)
  61
  62 /* === G L O B A L S ======================================================= */
  63
  64 SYNFIG_LAYER_INIT(Layer_Freetype);
  65 SYNFIG_LAYER_SET_NAME(Layer_Freetype,"text");
  66 SYNFIG_LAYER_SET_LOCAL_NAME(Layer_Freetype,N_("Text"));
  67 SYNFIG_LAYER_SET_CATEGORY(Layer_Freetype,N_("Other"));
  68 SYNFIG_LAYER_SET_VERSION(Layer_Freetype,"0.2");
  69 SYNFIG_LAYER_SET_CVS_ID(Layer_Freetype,"$Id$");
  70
  71 /* === P R O C E D U R E S ================================================= */
  72
  73 /*Glyph::~Glyph()
  74 {
  75         if(glyph)FT_Done_Glyph(glyph);
  76 }
  77 */
  78 void
  79 TextLine::clear_and_free()
  80 {
  81         std::vector<Glyph>::iterator iter;
  82         for(iter=glyph_table.begin();iter!=glyph_table.end();++iter)
  83         {
  84                 if(iter->glyph)FT_Done_Glyph(iter->glyph);
  85                 iter->glyph=0;
  86         }
  87         glyph_table.clear();
  88 }
  89
  90 /* === M E T H O D S ======================================================= */
  91
  92 Layer_Freetype::Layer_Freetype()
  93 {
  94         face=0;
  95
  96         size=Vector(0.25,0.25);
  97         text=_("Text Layer");
  98         color=Color::black();
  99         pos=Vector(0,0);
 100         orient=Vector(0.5,0.5);
 101         compress=1.0;
 102         vcompress=1.0;
 103         weight=WEIGHT_NORMAL;
 104         style=PANGO_STYLE_NORMAL;
 105         family="Sans Serif";
 106         use_kerning=true;
 107         grid_fit=false;
 108         old_version=false;
 109         set_blend_method(Color::BLEND_COMPOSITE);
 110         needs_sync_=true;
 111
 112         new_font(family,style,weight);
 113
 114         invert=false;
 115 }
 116
 117 Layer_Freetype::~Layer_Freetype()
 118 {
 119         if(face)
 120                 FT_Done_Face(face);
 121 }
 122
 123 void
 124 Layer_Freetype::new_font(const synfig::String &family, int style, int weight)
 125 {
 126         if(
 127                 !new_font_(family,style,weight) &&
 128                 !new_font_(family,style,WEIGHT_NORMAL) &&
 129                 !new_font_(family,PANGO_STYLE_NORMAL,weight) &&
 130                 !new_font_(family,PANGO_STYLE_NORMAL,WEIGHT_NORMAL) &&
 131                 !new_font_("sans serif",style,weight) &&
 132                 !new_font_("sans serif",style,WEIGHT_NORMAL) &&
 133                 !new_font_("sans serif",PANGO_STYLE_NORMAL,weight)
 134         )
 135                 new_font_("sans serif",PANGO_STYLE_NORMAL,WEIGHT_NORMAL);
 136 }
 137
 138 bool
 139 Layer_Freetype::new_font_(const synfig::String &font_fam_, int style, int weight)
 140 {
 141         synfig::String font_fam(font_fam_);
 142
 143         if(new_face(font_fam_))
 144                 return true;
 145
 146         //start evil hack
 147         for(unsigned int i=0;i<font_fam.size();i++)font_fam[i]=tolower(font_fam[i]);
 148         //end evil hack
 149
 150         if(font_fam=="arial black")
 151         {
 152 #ifndef __APPLE__
 153                 if(new_face("ariblk"))
 154                         return true;
 155                 else
 156 #endif
 157                 font_fam="sans serif";
 158         }
 159
 160         if(font_fam=="sans serif" || font_fam=="arial")
 161         {
 162                 String arial("arial");
 163                 if(weight>WEIGHT_NORMAL)
 164                         arial+='b';
 165                 if(style==PANGO_STYLE_ITALIC||style==PANGO_STYLE_OBLIQUE)
 166                         arial+='i';
 167                 else
 168                         if(weight>WEIGHT_NORMAL) arial+='d';
 169
 170                 if(new_face(arial))
 171                         return true;
 172 #ifdef __APPLE__
 173                 if(new_face("Helvetica RO"))
 174                         return true;
 175 #endif
 176         }
 177
 178         if(font_fam=="comic" || font_fam=="comic sans")
 179         {
 180                 String filename("comic");
 181                 if(weight>WEIGHT_NORMAL)
 182                         filename+='b';
 183                 if(style==PANGO_STYLE_ITALIC||style==PANGO_STYLE_OBLIQUE)
 184                         filename+='i';
 185                 else if(weight>WEIGHT_NORMAL) filename+='d';
 186
 187                 if(new_face(filename))
 188                         return true;
 189         }
 190
 191         if(font_fam=="courier" || font_fam=="courier new")
 192         {
 193                 String filename("cour");
 194                 if(weight>WEIGHT_NORMAL)
 195                         filename+='b';
 196                 if(style==PANGO_STYLE_ITALIC||style==PANGO_STYLE_OBLIQUE)
 197                         filename+='i';
 198                 else if(weight>WEIGHT_NORMAL) filename+='d';
 199
 200                 if(new_face(filename))
 201                         return true;
 202         }
 203
 204         if(font_fam=="serif" || font_fam=="times" || font_fam=="times new roman")
 205         {
 206                 String filename("times");
 207                 if(weight>WEIGHT_NORMAL)
 208                         filename+='b';
 209                 if(style==PANGO_STYLE_ITALIC||style==PANGO_STYLE_OBLIQUE)
 210                         filename+='i';
 211                 else if(weight>WEIGHT_NORMAL) filename+='d';
 212
 213                 if(new_face(filename))
 214                         return true;
 215         }
 216
 217         if(font_fam=="trebuchet")
 218         {
 219                 String filename("trebuc");
 220                 if(weight>WEIGHT_NORMAL)
 221                         filename+='b';
 222                 if(style==PANGO_STYLE_ITALIC||style==PANGO_STYLE_OBLIQUE)
 223                 {
 224                         filename+='i';
 225                         if(weight<=WEIGHT_NORMAL) filename+='t';
 226                 }
 227                 else if(weight>WEIGHT_NORMAL) filename+='d';
 228
 229                 if(new_face(filename))
 230                         return true;
 231         }
 232
 233
 234         if(font_fam=="sans serif" || font_fam=="luxi sans")
 235         {
 236                 {
 237                         String luxi("luxis");
 238                         if(weight>WEIGHT_NORMAL)
 239                                 luxi+='b';
 240                         else
 241                                 luxi+='r';
 242                         if(style==PANGO_STYLE_ITALIC||style==PANGO_STYLE_OBLIQUE)
 243                                 luxi+='i';
 244
 245
 246                         if(new_face(luxi))
 247                                 return true;
 248                 }
 249                 if(new_face("arial"))
 250                         return true;
 251                 if(new_face("Arial"))
 252                         return true;
 253         }
 254         if(font_fam=="serif" || font_fam=="times" || font_fam=="times new roman" || font_fam=="luxi serif")
 255         {
 256                 {
 257                         String luxi("luxir");
 258                         if(weight>WEIGHT_NORMAL)
 259                                 luxi+='b';
 260                         else
 261                                 luxi+='r';
 262                         if(style==PANGO_STYLE_ITALIC||style==PANGO_STYLE_OBLIQUE)
 263                                 luxi+='i';
 264
 265                         if(new_face(luxi))
 266                                 return true;
 267                 }
 268                 if(new_face("Times New Roman"))
 269                         return true;
 270                 if(new_face("Times"))
 271                         return true;
 272         }
 273         if(font_fam=="luxi")
 274         {
 275                 {
 276                         String luxi("luxim");
 277                         if(weight>WEIGHT_NORMAL)
 278                                 luxi+='b';
 279                         else
 280                                 luxi+='r';
 281                         if(style==PANGO_STYLE_ITALIC||style==PANGO_STYLE_OBLIQUE)
 282                                 luxi+='i';
 283
 284                         if(new_face(luxi))
 285                                 return true;
 286                 }
 287
 288                 if(new_face("Times New Roman"))
 289                         return true;
 290                 if(new_face("Times"))
 291                         return true;
 292         }
 293
 294         return new_face(font_fam_) || new_face(font_fam);
 295
 296         return false;
 297 }
 298
 299 #ifdef USE_MAC_FT_FUNCS
 300 void fss2path(char *path, FSSpec *fss)
 301 {
 302   int l;             //fss->name contains name of last item in path
 303   for(l=0; l<(fss->name[0]); l++) path[l] = fss->name[l + 1];
 304   path[l] = 0;
 305
 306   if(fss->parID != fsRtParID) //path is more than just a volume name
 307   {
 308     int i, len;
 309     CInfoPBRec pb;
 310
 311     pb.dirInfo.ioNamePtr = fss->name;
 312     pb.dirInfo.ioVRefNum = fss->vRefNum;
 313     pb.dirInfo.ioDrParID = fss->parID;
 314     do
 315     {
 316       pb.dirInfo.ioFDirIndex = -1;  //get parent directory name
 317       pb.dirInfo.ioDrDirID = pb.dirInfo.ioDrParID;
 318       if(PBGetCatInfoSync(&pb) != noErr) break;
 319
 320       len = fss->name[0] + 1;
 321       for(i=l; i>=0;  i--) path[i + len] = path[i];
 322       for(i=1; i<len; i++) path[i - 1] = fss->name[i]; //add to start of path
 323       path[i - 1] = ':';
 324       l += len;
 325 } while(pb.dirInfo.ioDrDirID != fsRtDirID); //while more directory levels
 326   }
 327 }
 328 #endif
 329
 330 bool
 331 Layer_Freetype::new_face(const String &newfont)
 332 {
 333         int error;
 334         FT_Long face_index=0;
 335
 336         // If we are already loaded, don't bother reloading.
 337         if(face && font==newfont)
 338                 return true;
 339
 340         if(face)
 341         {
 342                 FT_Done_Face(face);
 343                 face=0;
 344         }
 345
 346         error=FT_New_Face(ft_library,newfont.c_str(),face_index,&face);
 347         if(error)error=FT_New_Face(ft_library,(newfont+".ttf").c_str(),face_index,&face);
 348
 349         if(get_canvas())
 350         {
 351                 if(error)error=FT_New_Face(ft_library,(get_canvas()->get_file_path()+ETL_DIRECTORY_SEPARATOR+newfont).c_str(),face_index,&face);
 352                 if(error)error=FT_New_Face(ft_library,(get_canvas()->get_file_path()+ETL_DIRECTORY_SEPARATOR+newfont+".ttf").c_str(),face_index,&face);
 353         }
 354
 355 #ifdef USE_MAC_FT_FUNCS
 356         if(error)
 357         {
 358                 FSSpec fs_spec;
 359                 error=FT_GetFile_From_Mac_Name(newfont.c_str(),&fs_spec,&face_index);
 360                 if(!error)
 361                 {
 362                         char filename[512];
 363                         fss2path(filename,&fs_spec);
 364                         //FSSpecToNativePathName(fs_spec,filename,sizeof(filename)-1, 0);
 365
 366                         error=FT_New_Face(ft_library, filename, face_index,&face);
 367                         //error=FT_New_Face_From_FSSpec(ft_library, &fs_spec, face_index,&face);
 368                         synfig::info(__FILE__":%d: \"%s\" (%s) -- ft_error=%d",__LINE__,newfont.c_str(),filename,error);
 369                 }
 370                 else
 371                 {
 372                         synfig::info(__FILE__":%d: \"%s\" -- ft_error=%d",__LINE__,newfont.c_str(),error);
 373                         // Unable to generate fs_spec
 374                 }
 375
 376         }
 377 #endif
 378
 379 #ifdef WITH_FONTCONFIG
 380         if(error)
 381         {
 382                 FcFontSet *fs;
 383                 FcResult result;
 384                 if( !FcInit() )
 385                 {
 386                         synfig::warning("Layer_Freetype: fontconfig: %s",_("unable to initialize"));
 387                         error = 1;
 388                 } else {
 389                         FcPattern* pat = FcNameParse((FcChar8 *) newfont.c_str());
 390                         FcConfigSubstitute(0, pat, FcMatchPattern);
 391                         FcDefaultSubstitute(pat);
 392                         FcPattern *match;
 393                         fs = FcFontSetCreate();
 394                         match = FcFontMatch(0, pat, &result);
 395                         if (match)
 396                                 FcFontSetAdd(fs, match);
 397                         if (pat)
 398                                 FcPatternDestroy(pat);
 399                         if(fs){
 400                                 FcChar8* file;
 401                                 if( FcPatternGetString (fs->fonts[0], FC_FILE, 0, &file) == FcResultMatch )
 402                                         error=FT_New_Face(ft_library,(const char*)file,face_index,&face);
 403                                 FcFontSetDestroy(fs);
 404                         } else
 405                                 synfig::warning("Layer_Freetype: fontconfig: %s",_("empty font set"));
 406                 }
 407         }
 408 #endif
 409
 410 #ifdef WIN32
 411         if(error)error=FT_New_Face(ft_library,("C:\\WINDOWS\\FONTS\\"+newfont).c_str(),face_index,&face);
 412         if(error)error=FT_New_Face(ft_library,("C:\\WINDOWS\\FONTS\\"+newfont+".ttf").c_str(),face_index,&face);
 413 #else
 414
 415 #ifdef __APPLE__
 416         if(error)error=FT_New_Face(ft_library,("~/Library/Fonts/"+newfont).c_str(),face_index,&face);
 417         if(error)error=FT_New_Face(ft_library,("~/Library/Fonts/"+newfont+".ttf").c_str(),face_index,&face);
 418         if(error)error=FT_New_Face(ft_library,("~/Library/Fonts/"+newfont+".dfont").c_str(),face_index,&face);
 419
 420         if(error)error=FT_New_Face(ft_library,("/Library/Fonts/"+newfont).c_str(),face_index,&face);
 421         if(error)error=FT_New_Face(ft_library,("/Library/Fonts/"+newfont+".ttf").c_str(),face_index,&face);
 422         if(error)error=FT_New_Face(ft_library,("/Library/Fonts/"+newfont+".dfont").c_str(),face_index,&face);
 423 #endif
 424
 425         if(error)error=FT_New_Face(ft_library,("/usr/X11R6/lib/X11/fonts/type1/"+newfont).c_str(),face_index,&face);
 426         if(error)error=FT_New_Face(ft_library,("/usr/X11R6/lib/X11/fonts/type1/"+newfont+".ttf").c_str(),face_index,&face);
 427
 428         if(error)error=FT_New_Face(ft_library,("/usr/share/fonts/truetype/"+newfont).c_str(),face_index,&face);
 429         if(error)error=FT_New_Face(ft_library,("/usr/share/fonts/truetype/"+newfont+".ttf").c_str(),face_index,&face);
 430
 431         if(error)error=FT_New_Face(ft_library,("/usr/X11R6/lib/X11/fonts/TTF/"+newfont).c_str(),face_index,&face);
 432         if(error)error=FT_New_Face(ft_library,("/usr/X11R6/lib/X11/fonts/TTF/"+newfont+".ttf").c_str(),face_index,&face);
 433
 434         if(error)error=FT_New_Face(ft_library,("/usr/X11R6/lib/X11/fonts/truetype/"+newfont).c_str(),face_index,&face);
 435         if(error)error=FT_New_Face(ft_library,("/usr/X11R6/lib/X11/fonts/truetype/"+newfont+".ttf").c_str(),face_index,&face);
 436
 437 #endif
 438         if(error)
 439         {
 440                 //synfig::error(strprintf("Layer_Freetype:%s (err=%d)",_("Unable to open face."),error));
 441                 return false;
 442         }
 443
 444         font=newfont;
 445
 446         needs_sync_=true;
 447         return true;
 448 }
 449
 450 bool
 451 Layer_Freetype::set_param(const String & param, const ValueBase &value)
 452 {
 453         Mutex::Lock lock(mutex);
 454 /*
 455         if(param=="font" && value.same_type_as(font))
 456         {
 457                 new_font(etl::basename(value.get(font)),style,weight);
 458                 family=etl::basename(value.get(font));
 459                 return true;
 460         }
 461 */
 462         IMPORT_PLUS(family,new_font(family,style,weight));
 463         IMPORT_PLUS(weight,new_font(family,style,weight));
 464         IMPORT_PLUS(style,new_font(family,style,weight));
 465         IMPORT_PLUS(size, if(old_version){size/=2.0;} needs_sync_=true );
 466         IMPORT_PLUS(text,needs_sync_=true);
 467         IMPORT_PLUS(pos,needs_sync_=true);
 468         IMPORT_PLUS(color, { if (color.get_a() == 0) { if (converted_blend_) {
 469                                         set_blend_method(Color::BLEND_ALPHA_OVER);
 470                                         color.set_a(1); } else transparent_color_ = true; } });
 471         IMPORT(invert);
 472         IMPORT_PLUS(orient,needs_sync_=true);
 473         IMPORT_PLUS(compress,needs_sync_=true);
 474         IMPORT_PLUS(vcompress,needs_sync_=true);
 475         IMPORT_PLUS(use_kerning,needs_sync_=true);
 476         IMPORT_PLUS(grid_fit,needs_sync_=true);
 477
 478         return Layer_Composite::set_param(param,value);
 479 }
 480
 481 ValueBase
 482 Layer_Freetype::get_param(const String& param)const
 483 {
 484         EXPORT(font);
 485         EXPORT(family);
 486         EXPORT(style);
 487         EXPORT(weight);
 488         EXPORT(size);
 489         EXPORT(text);
 490         EXPORT(color);
 491         EXPORT(pos);
 492         EXPORT(orient);
 493         EXPORT(compress);
 494         EXPORT(vcompress);
 495         EXPORT(use_kerning);
 496         EXPORT(grid_fit);
 497         EXPORT(invert);
 498
 499         EXPORT_NAME();
 500         EXPORT_VERSION();
 501
 502         return Layer_Composite::get_param(param);
 503 }
 504
 505 Layer::Vocab
 506 Layer_Freetype::get_param_vocab(void)const
 507 {
 508         Layer::Vocab ret(Layer_Composite::get_param_vocab());
 509
 510         ret.push_back(ParamDesc("text")
 511                 .set_local_name(_("Text"))
 512                 .set_description(_("Text to Render"))
 513                 .set_hint("paragraph")
 514         );
 515
 516         ret.push_back(ParamDesc("color")
 517                 .set_local_name(_("Color"))
 518                 .set_description(_("Color of the text"))
 519         );
 520
 521         ret.push_back(ParamDesc("family")
 522                 .set_local_name(_("Font Family"))
 523                 .set_hint("font_family")
 524         );
 525
 526         ret.push_back(ParamDesc("style")
 527                 .set_local_name(_("Style"))
 528                 .set_hint("enum")
 529                 .add_enum_value(PANGO_STYLE_NORMAL, "normal" ,_("Normal"))
 530                 .add_enum_value(PANGO_STYLE_OBLIQUE, "oblique" ,_("Oblique"))
 531                 .add_enum_value(PANGO_STYLE_ITALIC, "italic" ,_("Italic"))
 532         );
 533
 534         ret.push_back(ParamDesc("weight")
 535                 .set_local_name(_("Weight"))
 536                 .set_hint("enum")
 537                 .add_enum_value(200, "ultralight" ,_("Ultralight"))
 538                 .add_enum_value(300, "light" ,_("light"))
 539                 .add_enum_value(400, "normal" ,_("Normal"))
 540                 .add_enum_value(700, "bold" ,_("Bold"))
 541                 .add_enum_value(800, "ultrabold" ,_("Ultrabold"))
 542                 .add_enum_value(900, "heavy" ,_("Heavy"))
 543         );
 544         ret.push_back(ParamDesc("compress")
 545                 .set_local_name(_("Horizontal Spacing"))
 546                 .set_description(_("Describes how close glyphs are horizontally"))
 547         );
 548
 549         ret.push_back(ParamDesc("vcompress")
 550                 .set_local_name(_("Vertical Spacing"))
 551                 .set_description(_("Describes how close lines of text are vertically"))
 552         );
 553
 554         ret.push_back(ParamDesc("size")
 555                 .set_local_name(_("Size"))
 556                 .set_description(_("Size of the text"))
 557                 .set_hint("size")
 558                 .set_origin("pos")
 559                 .set_scalar(1)
 560         );
 561
 562         ret.push_back(ParamDesc("orient")
 563                 .set_local_name(_("Orientation"))
 564                 .set_description(_("Text Orientation"))
 565                 .set_invisible_duck()
 566         );
 567
 568         ret.push_back(ParamDesc("pos")
 569                 .set_local_name(_("Position"))
 570                 .set_description(_("Text Position"))
 571         );
 572
 573         ret.push_back(ParamDesc("font")
 574                 .set_local_name(_("Font"))
 575                 .set_description(_("Filename of the font to use"))
 576                 .set_hint("filename")
 577                 .not_critical()
 578                 .hidden()
 579         );
 580
 581         ret.push_back(ParamDesc("use_kerning")
 582                 .set_local_name(_("Kerning"))
 583                 .set_description(_("Enables/Disables font kerning (If the font supports it)"))
 584         );
 585
 586         ret.push_back(ParamDesc("grid_fit")
 587                 .set_local_name(_("Sharpen Edges"))
 588                 .set_description(_("Turn this off if you are going to be animating the text"))
 589         );
 590         ret.push_back(ParamDesc("invert")
 591                 .set_local_name(_("Invert"))
 592         );
 593         return ret;
 594 }
 595
 596 void
 597 Layer_Freetype::sync()
 598 {
 599         needs_sync_=false;
 600
 601
 602
 603
 604 }
 605
 606 Color
 607 Layer_Freetype::get_color(Context context, const synfig::Point &pos)const
 608 {
 609         if(needs_sync_)
 610                 const_cast<Layer_Freetype*>(this)->sync();
 611
 612         if(!face)
 613                 return context.get_color(pos);
 614         return context.get_color(pos);
 615 }
 616
 617 bool
 618 Layer_Freetype::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
 619 {
 620         static synfig::RecMutex freetype_mutex;
 621
 622         if(needs_sync_)
 623                 const_cast<Layer_Freetype*>(this)->sync();
 624
 625
 626
 627
 628         int error;
 629         Vector size(Layer_Freetype::size*2);
 630
 631         if(!context.accelerated_render(surface,quality,renddesc,cb))
 632                 return false;
 633
 634         if(is_disabled() || text.empty())
 635                 return true;
 636
 637         // If there is no font loaded, just bail
 638         if(!face)
 639         {
 640                 if(cb)cb->warning(string("Layer_Freetype:")+_("No face loaded, no text will be rendered."));
 641                 return true;
 642         }
 643
 644         String text(Layer_Freetype::text);
 645         if(text=="@_FILENAME_@" && get_canvas() && !get_canvas()->get_file_name().empty())
 646         {
 647                 text=basename(get_canvas()->get_file_name());
 648         }
 649
 650         // Width and Height of a pixel
 651         Vector::value_type pw=renddesc.get_w()/(renddesc.get_br()[0]-renddesc.get_tl()[0]);
 652         Vector::value_type ph=renddesc.get_h()/(renddesc.get_br()[1]-renddesc.get_tl()[1]);
 653
 654     // Calculate character width and height
 655         int w=abs(round_to_int(size[0]*pw));
 656         int h=abs(round_to_int(size[1]*ph));
 657
 658     //int bx=(int)((pos[0]-renddesc.get_tl()[0])*pw*64+0.5);
 659     //int by=(int)((pos[1]-renddesc.get_tl()[1])*ph*64+0.5);
 660     int bx=0;
 661     int by=0;
 662
 663     // If the font is the size of a pixel, don't bother rendering any text
 664         if(w<=1 || h<=1)
 665         {
 666                 if(cb)cb->warning(string("Layer_Freetype:")+_("Text too small, no text will be rendered."));
 667                 return true;
 668         }
 669
 670         synfig::RecMutex::Lock lock(freetype_mutex);
 671
 672 #define CHAR_RESOLUTION         (64)
 673         error = FT_Set_Char_Size(
 674                 face,                                           // handle to face object
 675                 (int)CHAR_RESOLUTION,   // char_width in 1/64th of points
 676                 (int)CHAR_RESOLUTION,   // char_height in 1/64th of points
 677                 round_to_int(abs(size[0]*pw*CHAR_RESOLUTION)),                                          // horizontal device resolution
 678                 round_to_int(abs(size[1]*ph*CHAR_RESOLUTION)) );                                                // vertical device resolution
 679
 680         // Here is where we can compensate for the
 681         // error in freetype's rendering engine.
 682         const float xerror(abs(size[0]*pw)/(float)face->size->metrics.x_ppem/1.13f/0.996);
 683         const float yerror(abs(size[1]*ph)/(float)face->size->metrics.y_ppem/1.13f/0.996);
 684         //synfig::info("xerror=%f, yerror=%f",xerror,yerror);
 685         const float compress(Layer_Freetype::compress*xerror);
 686         const float vcompress(Layer_Freetype::vcompress*yerror);
 687
 688         if(error)
 689         {
 690                 if(cb)cb->warning(string("Layer_Freetype:")+_("Unable to set face size.")+strprintf(" (err=%d)",error));
 691         }
 692
 693         FT_GlyphSlot  slot = face->glyph;  // a small shortcut
 694         FT_UInt       glyph_index(0);
 695         FT_UInt       previous(0);
 696         int u,v;
 697
 698         std::list<TextLine> lines;
 699
 700         /*
 701  --     ** -- CREATE GLYPHS -------------------------------------------------------
 702         */
 703
 704         mbstate_t ps;
 705         memset(&ps, 0, sizeof(ps));
 706
 707         lines.push_front(TextLine());
 708         string::const_iterator iter;
 709         for (iter=text.begin(); iter!=text.end(); ++iter)
 710         {
 711                 int multiplier(1);
 712                 if(*iter=='\n')
 713                 {
 714                         lines.push_front(TextLine());
 715                         bx=0;
 716                         by=0;
 717                         previous=0;
 718                         continue;
 719                 }
 720                 if(*iter=='\t')
 721                 {
 722                         multiplier=8;
 723                         glyph_index = FT_Get_Char_Index( face, ' ' );
 724                 }
 725                 else
 726                 {
 727                         wchar_t wc;
 728                         size_t converted = mbrtowc(&wc, &(*iter), text.end() - iter, &ps);
 729
 730                         if(converted == (size_t)(-1))
 731                         {
 732                                 synfig::warning("Layer_Freetype: multibyte: %s",
 733                                                                 _("Invalid multibyte sequence - is the locale set?\n"));
 734                                 continue;
 735                         }
 736
 737                         if(converted == (size_t)(-2))
 738                         {
 739                                 synfig::warning("Layer_Freetype: multibyte: %s",
 740                                                                 _("Can't parse multibyte character.\n"));
 741                                 continue;
 742                         }
 743
 744                         glyph_index = FT_Get_Char_Index( face, wc );
 745
 746                         if(converted > 1)
 747                                 iter += converted - 1;
 748                 }
 749
 750         // retrieve kerning distance and move pen position
 751                 if ( FT_HAS_KERNING(face) && use_kerning && previous && glyph_index )
 752                 {
 753                         FT_Vector  delta;
 754
 755                         if(grid_fit)
 756                                 FT_Get_Kerning( face, previous, glyph_index, ft_kerning_default, &delta );
 757                         else
 758                                 FT_Get_Kerning( face, previous, glyph_index, ft_kerning_unfitted, &delta );
 759
 760                         if(compress<1.0f)
 761                         {
 762                                 bx += round_to_int(delta.x*compress);
 763                                 by += round_to_int(delta.y*compress);
 764                         }
 765                         else
 766                         {
 767                                 bx += delta.x;
 768                                 by += delta.y;
 769                         }
 770         }
 771
 772                 Glyph curr_glyph;
 773
 774         // store current pen position
 775         curr_glyph.pos.x = bx;
 776         curr_glyph.pos.y = by;
 777
 778         // load glyph image into the slot. DO NOT RENDER IT !!
 779         if(grid_fit)
 780                         error = FT_Load_Glyph( face, glyph_index, FT_LOAD_DEFAULT);
 781                 else
 782                         error = FT_Load_Glyph( face, glyph_index, FT_LOAD_DEFAULT|FT_LOAD_NO_HINTING );
 783         if (error) continue;  // ignore errors, jump to next glyph
 784
 785         // extract glyph image and store it in our table
 786         error = FT_Get_Glyph( face->glyph, &curr_glyph.glyph );
 787         if (error) continue;  // ignore errors, jump to next glyph
 788
 789         // record current glyph index
 790         previous = glyph_index;
 791
 792                 // Update the line width
 793                 lines.front().width=bx+slot->advance.x;
 794
 795                 // increment pen position
 796                 if(multiplier>1)
 797                         bx += round_to_int(slot->advance.x*multiplier*compress)-bx%round_to_int(slot->advance.x*multiplier*compress);
 798                 else
 799                         bx += round_to_int(slot->advance.x*compress*multiplier);
 800
 801                 //bx += round_to_int(slot->advance.x*compress*multiplier);
 802                 //by += round_to_int(slot->advance.y*compress);
 803                 by += slot->advance.y*multiplier;
 804
 805                 lines.front().glyph_table.push_back(curr_glyph);
 806
 807         }
 808
 809
 810         //float string_height;
 811         //string_height=(((lines.size()-1)*face->size->metrics.height+lines.back().actual_height()));
 812
 813         //int string_height=face->size->metrics.ascender;
 814 //#define METRICS_SCALE_ONE             (65536.0f)
 815 #define METRICS_SCALE_ONE               ((float)(1<<16))
 816
 817         float line_height;
 818         line_height=vcompress*((float)face->height*(((float)face->size->metrics.y_scale/METRICS_SCALE_ONE)));
 819
 820         // This module sees to expect pixel height to be negative, as it
 821         // usually is.  But rendering to .bmp format causes ph to be
 822         // positive, which was causing text to be rendered upside down.
 823         if (ph>0) line_height = -line_height;
 824
 825         int     string_height;
 826         string_height=round_to_int(((lines.size()-1)*line_height+lines.back().actual_height()));
 827         //synfig::info("string_height=%d",string_height);
 828         //synfig::info("line_height=%f",line_height);
 829
 830         /*
 831  --     ** -- RENDER THE GLYPHS ---------------------------------------------------
 832         */
 833
 834         Surface src_;
 835         Surface *src_surface;
 836
 837         src_surface=surface;
 838
 839         if(invert)
 840         {
 841                 src_=*surface;
 842                 Surface::alpha_pen pen(surface->begin(),get_amount(),get_blend_method());
 843
 844                 surface->fill(color,pen,src_.get_w(),src_.get_h());
 845
 846                 src_surface=&src_;
 847         }
 848
 849         {
 850         std::list<TextLine>::iterator iter;
 851         int curr_line;
 852         for(curr_line=0,iter=lines.begin();iter!=lines.end();++iter,curr_line++)
 853         {
 854                 bx=round_to_int((pos[0]-renddesc.get_tl()[0])*pw*CHAR_RESOLUTION-orient[0]*iter->width);
 855                 // I've no idea why 1.5, but it kind of works.  Otherwise,
 856                 // rendering to .bmp (which renders from bottom to top, due to
 857                 // the .bmp format describing the image from bottom to top,
 858                 // renders text in the wrong place.
 859                 by=round_to_int((pos[1]-renddesc.get_tl()[1])*ph*CHAR_RESOLUTION +
 860                                                 (1.0-orient[1])*string_height-line_height*curr_line +
 861                                                 ((ph>0) ? line_height/1.5 : 0));
 862
 863                 //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));
 864                 //synfig::info("curr_line=%d, bx=%d, by=%d",curr_line,bx,by);
 865
 866                 std::vector<Glyph>::iterator iter2;
 867                 for(iter2=iter->glyph_table.begin();iter2!=iter->glyph_table.end();++iter2)
 868                 {
 869                         FT_Glyph  image(iter2->glyph);
 870                         FT_Vector pen;
 871                         FT_BitmapGlyph  bit;
 872
 873                         pen.x = bx + iter2->pos.x;
 874                         pen.y = by + iter2->pos.y;
 875
 876                         //synfig::info("GLYPH: line %d, pen.x=%d, pen,y=%d",curr_line,(pen.x+32)>>6,(pen.y+32)>>6);
 877
 878                         error = FT_Glyph_To_Bitmap( &image, ft_render_mode_normal,0/*&pen*/, 1 );
 879                         if(error) { FT_Done_Glyph( image ); continue; }
 880
 881                         bit = (FT_BitmapGlyph)image;
 882
 883                         for(v=0;v<bit->bitmap.rows;v++)
 884                                 for(u=0;u<bit->bitmap.width;u++)
 885                                 {
 886                                         int x=u+((pen.x+32)>>6)+ bit->left;
 887                                         int y=((pen.y+32)>>6) + (bit->top - v) * ((ph<0) ? -1 : 1);
 888                                         if(     y>=0 &&
 889                                                 x>=0 &&
 890                                                 y<surface->get_h() &&
 891                                                 x<surface->get_w())
 892                                         {
 893                                                 float myamount=(float)bit->bitmap.buffer[v*bit->bitmap.pitch+u]/255.0f;
 894                                                 if(invert)
 895                                                         myamount=1.0f-myamount;
 896                                                 (*surface)[y][x]=Color::blend(color,(*src_surface)[y][x],myamount*get_amount(),get_blend_method());
 897                                         }
 898                                 }
 899
 900                         FT_Done_Glyph( image );
 901                 }
 902                 //iter->clear_and_free();
 903         }
 904         }
 905
 906
 907         return true;
 908 }
 909
 910 synfig::Rect
 911 Layer_Freetype::get_bounding_rect()const
 912 {
 913         if(needs_sync_)
 914                 const_cast<Layer_Freetype*>(this)->sync();
 915 //      if(!is_disabled())
 916                 return synfig::Rect::full_plane();
 917 }