src/mgl/fontutil.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        mgl/fontutil.cpp
   3 // Purpose:     Font helper functions for MGL
   4 // Author:      Vaclav Slavik
   5 // Created:     2001/04/29
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2001, Vaclav Slavik
   8 // Licence:     wxWindows license
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11
  12 #ifdef __GNUG__
  13     #pragma implementation "fontutil.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20     #pragma hdrstop
  21 #endif
  22
  23 #ifndef WX_PRECOMP
  24 #endif // PCH
  25
  26
  27 #include "wx/fontutil.h"
  28 #include "wx/fontmap.h"
  29 #include "wx/tokenzr.h"
  30 #include "wx/hash.h"
  31 #include "wx/module.h"
  32 #include "wx/listimpl.cpp"
  33 #include "wx/log.h"
  34 #include "wx/mgl/private.h"
  35
  36 #include <mgraph.h>
  37
  38 // ============================================================================
  39 // implementation
  40 // ============================================================================
  41
  42 // ----------------------------------------------------------------------------
  43 // wxNativeEncodingInfo
  44 // ----------------------------------------------------------------------------
  45
  46 // convert to/from the string representation: format is
  47 //      encoding[;facename]
  48 bool wxNativeEncodingInfo::FromString(const wxString& s)
  49 {
  50     wxStringTokenizer tokenizer(s, _T(";"));
  51
  52     wxString encid = tokenizer.GetNextToken();
  53     long enc;
  54     if ( !encid.ToLong(&enc) )
  55         return FALSE;
  56     encoding = (wxFontEncoding)enc;
  57
  58     // ok even if empty
  59     facename = tokenizer.GetNextToken();
  60
  61     return TRUE;
  62 }
  63
  64 wxString wxNativeEncodingInfo::ToString() const
  65 {
  66     wxString s;
  67     s << (long)encoding;
  68     if ( !!facename )
  69     {
  70         s << _T(';') << facename;
  71     }
  72
  73     return s;
  74 }
  75
  76 // ----------------------------------------------------------------------------
  77 // common functions
  78 // ----------------------------------------------------------------------------
  79
  80 bool wxGetNativeFontEncoding(wxFontEncoding encoding,
  81                              wxNativeEncodingInfo *info)
  82 {
  83     wxCHECK_MSG( info, FALSE, _T("bad pointer in wxGetNativeFontEncoding") );
  84
  85     if ( encoding == wxFONTENCODING_DEFAULT )
  86     {
  87         encoding = wxFont::GetDefaultEncoding();
  88     }
  89
  90     switch ( encoding )
  91     {
  92         case wxFONTENCODING_ISO8859_1:
  93         case wxFONTENCODING_ISO8859_2:
  94         case wxFONTENCODING_ISO8859_3:
  95         case wxFONTENCODING_ISO8859_4:
  96         case wxFONTENCODING_ISO8859_5:
  97         case wxFONTENCODING_ISO8859_6:
  98         case wxFONTENCODING_ISO8859_7:
  99         case wxFONTENCODING_ISO8859_8:
 100         case wxFONTENCODING_ISO8859_9:
 101         case wxFONTENCODING_ISO8859_10:
 102         case wxFONTENCODING_ISO8859_11:
 103         case wxFONTENCODING_ISO8859_13:
 104         case wxFONTENCODING_ISO8859_14:
 105         case wxFONTENCODING_ISO8859_15:
 106             info->mglEncoding = MGL_ENCODING_ISO8859_1 +
 107                                 (encoding - wxFONTENCODING_ISO8859_1);
 108             break;
 109
 110         case wxFONTENCODING_KOI8:
 111             info->mglEncoding = MGL_ENCODING_KOI8;
 112             break;
 113
 114         case wxFONTENCODING_CP1250:
 115         case wxFONTENCODING_CP1251:
 116         case wxFONTENCODING_CP1252:
 117         case wxFONTENCODING_CP1253:
 118         case wxFONTENCODING_CP1254:
 119         case wxFONTENCODING_CP1255:
 120         case wxFONTENCODING_CP1256:
 121         case wxFONTENCODING_CP1257:
 122             info->mglEncoding = MGL_ENCODING_CP1250 +
 123                                 (encoding - wxFONTENCODING_CP1250);
 124             break;
 125
 126         case wxFONTENCODING_SYSTEM:
 127             info->mglEncoding = MGL_ENCODING_ASCII;
 128             break;
 129
 130         default:
 131             // encoding not known to MGL
 132             return FALSE;
 133     }
 134
 135     info->encoding = encoding;
 136
 137     return TRUE;
 138 }
 139
 140 bool wxTestFontEncoding(const wxNativeEncodingInfo& info)
 141 {
 142     if ( !info.facename )
 143         return TRUE;
 144
 145     wxMGLFontFamily *family = wxTheFontsManager->GetFamily(info.facename);
 146     if ( !family )
 147         return FALSE;
 148     if ( family->GetInfo()->fontLibType == MGL_BITMAPFONT_LIB )
 149         return (info.mglEncoding == MGL_ENCODING_ASCII ||
 150                 info.mglEncoding == MGL_ENCODING_ISO8859_1 ||
 151                 info.mglEncoding == MGL_ENCODING_ISO8859_15 ||
 152                 info.mglEncoding == MGL_ENCODING_CP1252);
 153     else
 154         return TRUE;
 155 }
 156
 157
 158 // ----------------------------------------------------------------------------
 159 // wxFontFamily, wxMGLFontInstance, wxMGLFontLibrary
 160 // ----------------------------------------------------------------------------
 161
 162 WX_DECLARE_LIST(wxMGLFontInstance, wxMGLFontInstanceList);
 163 WX_DEFINE_LIST(wxMGLFontInstanceList);
 164 WX_DEFINE_LIST(wxMGLFontFamilyList);
 165
 166 wxMGLFontInstance::wxMGLFontInstance(wxMGLFontLibrary *fontLib,
 167                                      float pt, bool slant, bool aa)
 168 {
 169     m_fontLib = fontLib;
 170     m_font = NULL;
 171     m_pt = pt;
 172     m_slant = slant;
 173     m_aa = aa;
 174
 175     float slantAngle = m_slant ? 15.0 : 0.0;
 176
 177     wxLogTrace("mgl_font", "loading instance of '%s' slant=%i pt=%0.1f aa=%i",
 178                m_fontLib->GetMGLfont_lib_t()->name, m_slant, m_pt, m_aa);
 179     m_font = MGL_loadFontInstance(m_fontLib->GetMGLfont_lib_t(),
 180                                   m_pt, slantAngle, 0.0, aa);
 181     wxASSERT_MSG( m_font, wxT("Cannot create font instance.") );
 182 }
 183
 184 wxMGLFontInstance::~wxMGLFontInstance()
 185 {
 186     wxLogTrace("mgl_font", "unloading instance of '%s' slant=%i pt=%0.1f aa=%i",
 187                m_fontLib->GetMGLfont_lib_t()->name, m_slant, m_pt, m_aa);
 188     if ( m_font )
 189         MGL_unloadFontInstance(m_font);
 190 }
 191
 192 wxMGLFontLibrary::wxMGLFontLibrary(const wxString& filename, int type)
 193 {
 194     m_type = type;
 195     m_fileName = filename;
 196     m_refs = 0;
 197     m_fontLib = NULL;
 198
 199     m_instances = new wxMGLFontInstanceList;
 200     m_instances->DeleteContents(TRUE);
 201 }
 202
 203 wxMGLFontLibrary::~wxMGLFontLibrary()
 204 {
 205     wxLogTrace("mgl_font", "font library dtor '%s'", m_fileName.mb_str());
 206     delete m_instances;
 207 }
 208
 209 void wxMGLFontLibrary::IncRef()
 210 {
 211     wxLogTrace("mgl_font", "incRef(%u) '%s'", m_refs, m_fileName.c_str());
 212     if ( m_refs++ == 0 )
 213     {
 214         wxLogTrace("mgl_font", "opening library '%s'", m_fileName.mb_str());
 215         m_fontLib = MGL_openFontLib(m_fileName.mb_str());
 216     }
 217 }
 218
 219 void wxMGLFontLibrary::DecRef()
 220 {
 221     wxLogTrace("mgl_font", "decRef(%u) '%s'", m_refs, m_fileName.c_str());
 222     if ( --m_refs == 0 )
 223     {
 224         wxLogTrace("mgl_font", "killing instances of '%s'", m_fileName.mb_str());
 225         m_instances->Clear();
 226         wxLogTrace("mgl_font", "closing library '%s'", m_fileName.mb_str());
 227         MGL_closeFontLib(m_fontLib);
 228         m_fontLib = NULL;
 229     }
 230 }
 231
 232 wxMGLFontInstance *wxMGLFontLibrary::GetFontInstance(wxFont *font,
 233                                                      float scale, bool aa)
 234 {
 235     wxASSERT_MSG(m_refs > 0 && m_fontLib, wxT("font library not loaded!"));
 236
 237     wxString facename;
 238     bool slant;
 239     bool antialiased =
 240         (m_fontLib->fontLibType == MGL_BITMAPFONT_LIB) ? FALSE : aa;
 241     float pt = (float)font->GetPointSize() * scale;
 242
 243     slant = (((m_type & wxFONTFACE_ITALIC) == 0) &&
 244              (font->GetStyle() == wxSLANT || font->GetStyle() == wxITALIC));
 245
 246     // FIXME_MGL -- MGL does not yet support slant, although the API is there
 247     slant = FALSE;
 248
 249     wxLogTrace("mgl_font", "requested instance of '%s' slant=%i pt=%0.1f aa=%i",
 250                m_fileName.mb_str(), slant, pt, antialiased);
 251
 252     wxMGLFontInstance *i;
 253     wxMGLFontInstanceList::Node *node;
 254
 255     for (node = m_instances->GetFirst(); node; node = node->GetNext())
 256     {
 257         i = node->GetData();
 258         if ( i->GetPt() == pt && i->GetSlant() == slant &&
 259              i->GetAA() == antialiased )
 260         {
 261             wxLogTrace("mgl_font", "    got from cache: slant=%i pt=%0.1f aa=%i",
 262                        i->GetSlant(), i->GetPt(), i->GetAA());
 263             return i;
 264         }
 265     }
 266
 267     i = new wxMGLFontInstance(this, pt, slant, antialiased);
 268     m_instances->Append(i);
 269     return i;
 270 }
 271
 272
 273 wxMGLFontFamily::wxMGLFontFamily(const font_info_t *info)
 274 {
 275     m_name = info->familyName;
 276     m_fontInfo = info;
 277
 278     if ( info->regularFace[0] == '\0' )
 279         m_fontLibs[wxFONTFACE_REGULAR] = NULL;
 280     else
 281         m_fontLibs[wxFONTFACE_REGULAR] =
 282             new wxMGLFontLibrary(info->regularFace, wxFONTFACE_REGULAR);
 283
 284     if ( info->italicFace[0] == '\0' )
 285         m_fontLibs[wxFONTFACE_ITALIC] = NULL;
 286     else
 287         m_fontLibs[wxFONTFACE_ITALIC] =
 288             new wxMGLFontLibrary(info->italicFace, wxFONTFACE_ITALIC);
 289
 290     if ( info->boldFace[0] == '\0' )
 291         m_fontLibs[wxFONTFACE_BOLD] = NULL;
 292     else
 293         m_fontLibs[wxFONTFACE_BOLD] =
 294             new wxMGLFontLibrary(info->boldFace, wxFONTFACE_BOLD);
 295
 296     if ( info->boldItalicFace[0] == '\0' )
 297         m_fontLibs[wxFONTFACE_BOLD_ITALIC] = NULL;
 298     else
 299         m_fontLibs[wxFONTFACE_BOLD_ITALIC] =
 300             new wxMGLFontLibrary(info->boldItalicFace, wxFONTFACE_BOLD_ITALIC);
 301
 302     wxLogTrace("mgl_font", "new family '%s' (r=%s, i=%s, b=%s, bi=%s)\n",
 303                info->familyName, info->regularFace, info->italicFace,
 304                info->boldFace, info->boldItalicFace);
 305 }
 306
 307 wxMGLFontFamily::~wxMGLFontFamily()
 308 {
 309     for (size_t i = 0; i < wxFONTFACE_MAX; i++)
 310         delete m_fontLibs[i];
 311 }
 312
 313 bool wxMGLFontFamily::HasFace(int type) const
 314 {
 315     return (m_fontLibs[type] != NULL);
 316 }
 317
 318
 319 // ----------------------------------------------------------------------------
 320 // wxFontsManager
 321 // ----------------------------------------------------------------------------
 322
 323 wxMGLFontLibrary *wxFontsManager::GetFontLibrary(wxFont *font)
 324 {
 325     wxMGLFontFamily *family;
 326     wxString facename;
 327     int type;
 328
 329     if ( facename )
 330         family = GetFamily(font->GetFaceName());
 331     else
 332         family = NULL;
 333     if ( family )
 334         facename = font->GetFaceName();
 335     else
 336         facename.Empty();
 337
 338     if ( !family )
 339     {
 340         switch (font->GetFamily())
 341         {
 342             case wxSCRIPT:
 343                 facename = wxT("Script");
 344                 break;
 345             case wxDECORATIVE:
 346                 facename = wxT("Charter");
 347                 break;
 348             case wxROMAN:
 349                 facename = wxT("Times");
 350                 break;
 351             case wxTELETYPE:
 352             case wxMODERN:
 353                 facename = wxT("Courier");
 354                 break;
 355             case wxSWISS:
 356                 facename = wxT("Helvetica");
 357                 break;
 358             case wxDEFAULT:
 359             default:
 360                 facename = wxT("Helvetica");
 361                 break;
 362         }
 363
 364         family = GetFamily(facename);
 365         if ( !family )
 366         {
 367            if ( m_list->GetFirst() )
 368                family = m_list->GetFirst()->GetData();
 369            else
 370                wxFAIL_MSG(wxT("Fatal error, no fonts available!"));
 371         }
 372     }
 373
 374     type = wxFONTFACE_REGULAR;
 375
 376     if ( font->GetWeight() == wxBOLD )
 377         type |= wxFONTFACE_BOLD;
 378
 379     // FIXME_MGL -- this should read "if ( font->GetStyle() == wxITALIC )",
 380     // but since MGL does not yet support slant, we try to display it with
 381     // italic face (better than nothing...)
 382     if ( font->GetStyle() == wxITALIC || font->GetStyle() == wxSLANT )
 383     {
 384         if ( family->HasFace(type | wxFONTFACE_ITALIC) )
 385             type |= wxFONTFACE_ITALIC;
 386     }
 387     if ( !family->HasFace(type) )
 388     {
 389         for (int i = 0; i < wxFONTFACE_MAX; i++)
 390             if ( family->HasFace(i) )
 391             {
 392                 type = i;
 393                 break;
 394             }
 395     }
 396
 397     return family->GetLibrary(type);
 398 }
 399
 400 static ibool enum_callback(const font_info_t *info, void *cookie)
 401 {
 402     wxFontsManager *db = (wxFontsManager*)cookie;
 403     db->AddFamily(info);
 404     return TRUE;
 405 }
 406
 407 wxFontsManager::wxFontsManager()
 408 {
 409     m_hash = new wxHashTable(wxKEY_STRING);
 410     m_hash->DeleteContents(FALSE);
 411     m_list = new wxMGLFontFamilyList;
 412     m_list->DeleteContents(TRUE);
 413     MGL_enumerateFonts(enum_callback, (void*)this);
 414 }
 415
 416 wxFontsManager::~wxFontsManager()
 417 {
 418     delete m_hash;
 419     delete m_list;
 420 }
 421
 422 void wxFontsManager::AddFamily(const font_info_t *info)
 423 {
 424     wxMGLFontFamily *f = new wxMGLFontFamily(info);
 425     m_hash->Put(f->GetName().Lower(), f);
 426     m_list->Append(f);
 427 }
 428
 429 wxMGLFontFamily *wxFontsManager::GetFamily(const wxString& name) const
 430 {
 431     return (wxMGLFontFamily*)m_hash->Get(name.Lower());
 432 }
 433
 434
 435 wxFontsManager *wxTheFontsManager = NULL;
 436
 437
 438 // A module that takes care of fonts DB initialization and destruction:
 439
 440 class wxFontutilModule: public wxModule
 441 {
 442 DECLARE_DYNAMIC_CLASS(wxFontutilModule)
 443 public:
 444     wxFontutilModule() {}
 445     bool OnInit()
 446     {
 447         wxTheFontsManager = new wxFontsManager;
 448         return TRUE;
 449     }
 450     void OnExit()
 451     {
 452         delete wxTheFontsManager;
 453     }
 454 };
 455
 456 IMPLEMENT_DYNAMIC_CLASS(wxFontutilModule, wxModule)