src/msw/font.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/font.cpp
   3 // Purpose:     wxFont class
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) wxWidgets team
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #include "wx/font.h"
  28
  29 #ifndef WX_PRECOMP
  30     #include "wx/list.h"
  31     #include "wx/utils.h"
  32     #include "wx/app.h"
  33     #include "wx/log.h"
  34     #include "wx/msw/private.h"
  35 #endif // WX_PRECOMP
  36
  37 #include "wx/encinfo.h"
  38 #include "wx/fontutil.h"
  39 #include "wx/fontmap.h"
  40
  41 #ifndef __WXWINCE__
  42     #include "wx/sysopt.h"
  43 #endif
  44
  45 #include "wx/scopeguard.h"
  46 #include "wx/tokenzr.h"
  47
  48 // ----------------------------------------------------------------------------
  49 // constants
  50 // ----------------------------------------------------------------------------
  51
  52 // the mask used to extract the pitch from LOGFONT::lfPitchAndFamily field
  53 static const int PITCH_MASK = FIXED_PITCH | VARIABLE_PITCH;
  54
  55 // ----------------------------------------------------------------------------
  56 // wxFontRefData - the internal description of the font
  57 // ----------------------------------------------------------------------------
  58
  59 class WXDLLEXPORT wxFontRefData: public wxGDIRefData
  60 {
  61 public:
  62     // constructors
  63     wxFontRefData()
  64     {
  65         Init(-1, wxSize(0,0), false, wxFONTFAMILY_DEFAULT, wxFONTSTYLE_NORMAL,
  66              wxFONTWEIGHT_NORMAL, false, wxEmptyString,
  67              wxFONTENCODING_DEFAULT);
  68     }
  69
  70     wxFontRefData(int size,
  71                   const wxSize& pixelSize,
  72                   bool sizeUsingPixels,
  73                   wxFontFamily family,
  74                   wxFontStyle style,
  75                   wxFontWeight weight,
  76                   bool underlined,
  77                   const wxString& faceName,
  78                   wxFontEncoding encoding)
  79     {
  80         Init(size, pixelSize, sizeUsingPixels, family, style, weight,
  81              underlined, faceName, encoding);
  82     }
  83
  84     wxFontRefData(const wxNativeFontInfo& info, WXHFONT hFont = 0)
  85     {
  86         Init(info, hFont);
  87     }
  88
  89     wxFontRefData(const wxFontRefData& data) : wxGDIRefData()
  90     {
  91         Init(data.m_nativeFontInfo);
  92     }
  93
  94     virtual ~wxFontRefData();
  95
  96     // operations
  97     bool Alloc();
  98
  99     void Free();
 100
 101     // all wxFont accessors
 102     int GetPointSize() const
 103     {
 104         return m_nativeFontInfo.GetPointSize();
 105     }
 106
 107     wxSize GetPixelSize() const
 108     {
 109         return m_nativeFontInfo.GetPixelSize();
 110     }
 111
 112     bool IsUsingSizeInPixels() const
 113     {
 114         return m_sizeUsingPixels;
 115     }
 116
 117     wxFontFamily GetFamily() const
 118     {
 119         return m_nativeFontInfo.GetFamily();
 120     }
 121
 122     wxFontStyle GetStyle() const
 123     {
 124         return m_nativeFontInfo.GetStyle();
 125     }
 126
 127     wxFontWeight GetWeight() const
 128     {
 129         return m_nativeFontInfo.GetWeight();
 130     }
 131
 132     bool GetUnderlined() const
 133     {
 134         return m_nativeFontInfo.GetUnderlined();
 135     }
 136
 137     wxString GetFaceName() const
 138     {
 139         wxString facename = m_nativeFontInfo.GetFaceName();
 140         if ( facename.empty() )
 141         {
 142             facename = GetMSWFaceName();
 143             if ( !facename.empty() )
 144             {
 145                 // cache the face name, it shouldn't change unless the family
 146                 // does and wxNativeFontInfo::SetFamily() resets the face name
 147                 const_cast<wxFontRefData *>(this)->SetFaceName(facename);
 148             }
 149         }
 150
 151         return facename;
 152     }
 153
 154     wxFontEncoding GetEncoding() const
 155     {
 156         return m_nativeFontInfo.GetEncoding();
 157     }
 158
 159     WXHFONT GetHFONT() const
 160     {
 161         AllocIfNeeded();
 162
 163         return (WXHFONT)m_hFont;
 164     }
 165
 166     bool HasHFONT() const
 167     {
 168         return m_hFont != 0;
 169     }
 170
 171     // ... and setters: notice that all of them invalidate the currently
 172     // allocated HFONT, if any, so that the next call to GetHFONT() recreates a
 173     // new one
 174     void SetPointSize(int pointSize)
 175     {
 176         Free();
 177
 178         m_nativeFontInfo.SetPointSize(pointSize);
 179         m_sizeUsingPixels = false;
 180     }
 181
 182     void SetPixelSize(const wxSize& pixelSize)
 183     {
 184         wxCHECK_RET( pixelSize.GetWidth() >= 0, "negative font width" );
 185         wxCHECK_RET( pixelSize.GetHeight() != 0, "zero font height" );
 186
 187         Free();
 188
 189         m_nativeFontInfo.SetPixelSize(pixelSize);
 190         m_sizeUsingPixels = true;
 191     }
 192
 193     void SetFamily(wxFontFamily family)
 194     {
 195         Free();
 196
 197         m_nativeFontInfo.SetFamily(family);
 198     }
 199
 200     void SetStyle(wxFontStyle style)
 201     {
 202         Free();
 203
 204         m_nativeFontInfo.SetStyle(style);
 205     }
 206
 207     void SetWeight(wxFontWeight weight)
 208     {
 209         Free();
 210
 211         m_nativeFontInfo.SetWeight(weight);
 212     }
 213
 214     bool SetFaceName(const wxString& faceName)
 215     {
 216         Free();
 217
 218         return m_nativeFontInfo.SetFaceName(faceName);
 219     }
 220
 221     void SetUnderlined(bool underlined)
 222     {
 223         Free();
 224
 225         m_nativeFontInfo.SetUnderlined(underlined);
 226     }
 227
 228     void SetEncoding(wxFontEncoding encoding)
 229     {
 230         Free();
 231
 232         m_nativeFontInfo.SetEncoding(encoding);
 233     }
 234
 235     const wxNativeFontInfo& GetNativeFontInfo() const
 236     {
 237         // we need to create the font now to get the corresponding LOGFONT if
 238         // it hadn't been done yet
 239         AllocIfNeeded();
 240
 241         // ensure that we have a valid face name in our font information:
 242         // GetFaceName() will try to retrieve it from our HFONT and save it if
 243         // it was successful
 244         (void)GetFaceName();
 245
 246         return m_nativeFontInfo;
 247     }
 248
 249     void SetNativeFontInfo(const wxNativeFontInfo& nativeFontInfo)
 250     {
 251         Free();
 252
 253         m_nativeFontInfo = nativeFontInfo;
 254     }
 255
 256 protected:
 257     // common part of all ctors
 258     void Init(int size,
 259               const wxSize& pixelSize,
 260               bool sizeUsingPixels,
 261               wxFontFamily family,
 262               wxFontStyle style,
 263               wxFontWeight weight,
 264               bool underlined,
 265               const wxString& faceName,
 266               wxFontEncoding encoding);
 267
 268     void Init(const wxNativeFontInfo& info, WXHFONT hFont = 0);
 269
 270     void AllocIfNeeded() const
 271     {
 272         if ( !m_hFont )
 273             const_cast<wxFontRefData *>(this)->Alloc();
 274     }
 275
 276     // retrieve the face name really being used by the font: this is used to
 277     // get the face name selected by the system when we don't specify it (but
 278     // use just the family for example)
 279     wxString GetMSWFaceName() const
 280     {
 281         ScreenHDC hdc;
 282         SelectInHDC selectFont(hdc, m_hFont);
 283
 284         UINT otmSize = GetOutlineTextMetrics(hdc, 0, NULL);
 285         if ( !otmSize )
 286         {
 287             wxLogLastError("GetOutlineTextMetrics(NULL)");
 288             return wxString();
 289         }
 290
 291         OUTLINETEXTMETRIC * const
 292             otm = static_cast<OUTLINETEXTMETRIC *>(malloc(otmSize));
 293         wxON_BLOCK_EXIT1( free, otm );
 294
 295         otm->otmSize = otmSize;
 296         if ( !GetOutlineTextMetrics(hdc, otmSize, otm) )
 297         {
 298             wxLogLastError("GetOutlineTextMetrics()");
 299             return wxString();
 300         }
 301
 302         // in spite of its type, the otmpFamilyName field of OUTLINETEXTMETRIC
 303         // gives an offset in _bytes_ of the face (not family!) name from the
 304         // struct start while the name itself is an array of TCHARs
 305         //
 306         // FWIW otmpFaceName contains the same thing as otmpFamilyName followed
 307         // by a possible " Italic" or " Bold" or something else suffix
 308         return reinterpret_cast<wxChar *>(otm) +
 309                     wxPtrToUInt(otm->otmpFamilyName)/sizeof(wxChar);
 310     }
 311
 312     // are we using m_nativeFontInfo.lf.lfHeight for point size or pixel size?
 313     bool             m_sizeUsingPixels;
 314
 315     // Windows font handle, created on demand in GetHFONT()
 316     HFONT            m_hFont;
 317
 318     // Native font info
 319     wxNativeFontInfo m_nativeFontInfo;
 320 };
 321
 322 #define M_FONTDATA ((wxFontRefData*)m_refData)
 323
 324 // ============================================================================
 325 // implementation
 326 // ============================================================================
 327
 328 // ----------------------------------------------------------------------------
 329 // wxFontRefData
 330 // ----------------------------------------------------------------------------
 331
 332 void wxFontRefData::Init(int pointSize,
 333                          const wxSize& pixelSize,
 334                          bool sizeUsingPixels,
 335                          wxFontFamily family,
 336                          wxFontStyle style,
 337                          wxFontWeight weight,
 338                          bool underlined,
 339                          const wxString& faceName,
 340                          wxFontEncoding encoding)
 341 {
 342     m_hFont = NULL;
 343
 344     m_sizeUsingPixels = sizeUsingPixels;
 345     if ( m_sizeUsingPixels )
 346         SetPixelSize(pixelSize);
 347     else
 348         SetPointSize(pointSize);
 349
 350     SetStyle(style);
 351     SetWeight(weight);
 352     SetUnderlined(underlined);
 353
 354     // set the family/facename
 355     SetFamily(family);
 356     if ( !faceName.empty() )
 357         SetFaceName(faceName);
 358
 359     // deal with encoding now (it may override the font family and facename
 360     // so do it after setting them)
 361     SetEncoding(encoding);
 362 }
 363
 364 void wxFontRefData::Init(const wxNativeFontInfo& info, WXHFONT hFont)
 365 {
 366     // hFont may be zero, or it be passed in case we really want to
 367     // use the exact font created in the underlying system
 368     // (for example where we can't guarantee conversion from HFONT
 369     // to LOGFONT back to HFONT)
 370     m_hFont = (HFONT)hFont;
 371     m_nativeFontInfo = info;
 372
 373     // TODO: m_sizeUsingPixels?
 374 }
 375
 376 wxFontRefData::~wxFontRefData()
 377 {
 378     Free();
 379 }
 380
 381 bool wxFontRefData::Alloc()
 382 {
 383     m_hFont = ::CreateFontIndirect(&m_nativeFontInfo.lf);
 384     if ( !m_hFont )
 385     {
 386         wxLogLastError(wxT("CreateFont"));
 387         return false;
 388     }
 389
 390     return true;
 391 }
 392
 393 void wxFontRefData::Free()
 394 {
 395     if ( m_hFont )
 396     {
 397         if ( !::DeleteObject(m_hFont) )
 398         {
 399             wxLogLastError(wxT("DeleteObject(font)"));
 400         }
 401
 402         m_hFont = 0;
 403     }
 404 }
 405
 406 // ----------------------------------------------------------------------------
 407 // wxNativeFontInfo
 408 // ----------------------------------------------------------------------------
 409
 410 void wxNativeFontInfo::Init()
 411 {
 412     wxZeroMemory(lf);
 413
 414     // we get better font quality if we use PROOF_QUALITY instead of
 415     // DEFAULT_QUALITY but some fonts (e.g. "Terminal 6pt") are not available
 416     // then so we allow to set a global option to choose between quality and
 417     // wider font selection
 418 #ifdef __WXWINCE__
 419     lf.lfQuality = CLEARTYPE_QUALITY;
 420 #else
 421     lf.lfQuality = wxSystemOptions::GetOptionInt("msw.font.no-proof-quality")
 422                     ? DEFAULT_QUALITY
 423                     : PROOF_QUALITY;
 424 #endif
 425 }
 426
 427 int wxNativeFontInfo::GetPointSize() const
 428 {
 429     // FIXME: using the screen here results in incorrect font size calculation
 430     //        for printing!
 431     const int ppInch = ::GetDeviceCaps(ScreenHDC(), LOGPIXELSY);
 432
 433     // BC++ 2007 doesn't provide abs(long) overload, hence the cast
 434     return (int) (((72.0*abs((int)lf.lfHeight)) / (double) ppInch) + 0.5);
 435 }
 436
 437 wxSize wxNativeFontInfo::GetPixelSize() const
 438 {
 439     wxSize ret;
 440     ret.SetHeight(abs((int)lf.lfHeight));
 441     ret.SetWidth(lf.lfWidth);
 442     return ret;
 443 }
 444
 445 wxFontStyle wxNativeFontInfo::GetStyle() const
 446 {
 447     return lf.lfItalic ? wxFONTSTYLE_ITALIC : wxFONTSTYLE_NORMAL;
 448 }
 449
 450 wxFontWeight wxNativeFontInfo::GetWeight() const
 451 {
 452     if ( lf.lfWeight <= 300 )
 453         return wxFONTWEIGHT_LIGHT;
 454
 455     if ( lf.lfWeight >= 600 )
 456         return wxFONTWEIGHT_BOLD;
 457
 458     return wxFONTWEIGHT_NORMAL;
 459 }
 460
 461 bool wxNativeFontInfo::GetUnderlined() const
 462 {
 463     return lf.lfUnderline != 0;
 464 }
 465
 466 wxString wxNativeFontInfo::GetFaceName() const
 467 {
 468     return lf.lfFaceName;
 469 }
 470
 471 wxFontFamily wxNativeFontInfo::GetFamily() const
 472 {
 473     wxFontFamily family;
 474
 475     // extract family from pitch-and-family
 476     switch ( lf.lfPitchAndFamily & ~PITCH_MASK )
 477     {
 478         case 0:
 479             family = wxFONTFAMILY_UNKNOWN;
 480             break;
 481
 482         case FF_ROMAN:
 483             family = wxFONTFAMILY_ROMAN;
 484             break;
 485
 486         case FF_SWISS:
 487             family = wxFONTFAMILY_SWISS;
 488             break;
 489
 490         case FF_SCRIPT:
 491             family = wxFONTFAMILY_SCRIPT;
 492             break;
 493
 494         case FF_MODERN:
 495             family = wxFONTFAMILY_MODERN;
 496             break;
 497
 498         case FF_DECORATIVE:
 499             family = wxFONTFAMILY_DECORATIVE;
 500             break;
 501
 502         default:
 503             wxFAIL_MSG( "unknown LOGFONT::lfFamily value" );
 504             family = wxFONTFAMILY_UNKNOWN;
 505                 // just to avoid a warning
 506     }
 507
 508     return family;
 509 }
 510
 511 wxFontEncoding wxNativeFontInfo::GetEncoding() const
 512 {
 513     return wxGetFontEncFromCharSet(lf.lfCharSet);
 514 }
 515
 516 void wxNativeFontInfo::SetPointSize(int pointsize)
 517 {
 518     // FIXME: using the screen here results in incorrect font size calculation
 519     //        for printing!
 520     const int ppInch = ::GetDeviceCaps(ScreenHDC(), LOGPIXELSY);
 521
 522     lf.lfHeight = -(int)((pointsize*((double)ppInch)/72.0) + 0.5);
 523 }
 524
 525 void wxNativeFontInfo::SetPixelSize(const wxSize& pixelSize)
 526 {
 527     // MSW accepts both positive and negative heights here but they mean
 528     // different things: positive specifies the cell height while negative
 529     // specifies the character height. We used to just pass the value to MSW
 530     // unchanged but changed the behaviour for positive values in 2.9.1 to
 531     // match other ports and, more importantly, the expected behaviour. So now
 532     // passing the negative height doesn't make sense at all any more but we
 533     // still accept it for compatibility with the existing code which worked
 534     // around the wrong interpretation of the height argument in older wxMSW
 535     // versions by passing a negative value explicitly itself.
 536     lf.lfHeight = -abs(pixelSize.GetHeight());
 537     lf.lfWidth = pixelSize.GetWidth();
 538 }
 539
 540 void wxNativeFontInfo::SetStyle(wxFontStyle style)
 541 {
 542     switch ( style )
 543     {
 544         default:
 545             wxFAIL_MSG( "unknown font style" );
 546             // fall through
 547
 548         case wxFONTSTYLE_NORMAL:
 549             lf.lfItalic = FALSE;
 550             break;
 551
 552         case wxFONTSTYLE_ITALIC:
 553         case wxFONTSTYLE_SLANT:
 554             lf.lfItalic = TRUE;
 555             break;
 556     }
 557 }
 558
 559 void wxNativeFontInfo::SetWeight(wxFontWeight weight)
 560 {
 561     switch ( weight )
 562     {
 563         default:
 564             wxFAIL_MSG( "unknown font weight" );
 565             // fall through
 566
 567         case wxFONTWEIGHT_NORMAL:
 568             lf.lfWeight = FW_NORMAL;
 569             break;
 570
 571         case wxFONTWEIGHT_LIGHT:
 572             lf.lfWeight = FW_LIGHT;
 573             break;
 574
 575         case wxFONTWEIGHT_BOLD:
 576             lf.lfWeight = FW_BOLD;
 577             break;
 578     }
 579 }
 580
 581 void wxNativeFontInfo::SetUnderlined(bool underlined)
 582 {
 583     lf.lfUnderline = underlined;
 584 }
 585
 586 bool wxNativeFontInfo::SetFaceName(const wxString& facename)
 587 {
 588     wxStrlcpy(lf.lfFaceName, facename.c_str(), WXSIZEOF(lf.lfFaceName));
 589     return true;
 590 }
 591
 592 void wxNativeFontInfo::SetFamily(wxFontFamily family)
 593 {
 594     BYTE ff_family = FF_DONTCARE;
 595
 596     switch ( family )
 597     {
 598         case wxFONTFAMILY_SCRIPT:
 599             ff_family = FF_SCRIPT;
 600             break;
 601
 602         case wxFONTFAMILY_DECORATIVE:
 603             ff_family = FF_DECORATIVE;
 604             break;
 605
 606         case wxFONTFAMILY_ROMAN:
 607             ff_family = FF_ROMAN;
 608             break;
 609
 610         case wxFONTFAMILY_TELETYPE:
 611         case wxFONTFAMILY_MODERN:
 612             ff_family = FF_MODERN;
 613             break;
 614
 615         case wxFONTFAMILY_SWISS:
 616         case wxFONTFAMILY_DEFAULT:
 617             ff_family = FF_SWISS;
 618             break;
 619
 620         case wxFONTFAMILY_UNKNOWN:
 621             wxFAIL_MSG( "invalid font family" );
 622             return;
 623     }
 624
 625     wxCHECK_RET( ff_family != FF_DONTCARE, "unknown wxFontFamily" );
 626
 627     lf.lfPitchAndFamily = (BYTE)(DEFAULT_PITCH) | ff_family;
 628
 629     // reset the facename so that CreateFontIndirect() will automatically choose a
 630     // face name based only on the font family.
 631     lf.lfFaceName[0] = '\0';
 632 }
 633
 634 void wxNativeFontInfo::SetEncoding(wxFontEncoding encoding)
 635 {
 636     wxNativeEncodingInfo info;
 637     if ( !wxGetNativeFontEncoding(encoding, &info) )
 638     {
 639 #if wxUSE_FONTMAP
 640         if ( wxFontMapper::Get()->GetAltForEncoding(encoding, &info) )
 641         {
 642             if ( !info.facename.empty() )
 643             {
 644                 // if we have this encoding only in some particular facename, use
 645                 // the facename - it is better to show the correct characters in a
 646                 // wrong facename than unreadable text in a correct one
 647                 SetFaceName(info.facename);
 648             }
 649         }
 650         else
 651 #endif // wxUSE_FONTMAP
 652         {
 653             // unsupported encoding, replace with the default
 654             info.charset = DEFAULT_CHARSET;
 655         }
 656     }
 657
 658     lf.lfCharSet = (BYTE)info.charset;
 659 }
 660
 661 bool wxNativeFontInfo::FromString(const wxString& s)
 662 {
 663     long l;
 664
 665     wxStringTokenizer tokenizer(s, wxS(";"), wxTOKEN_RET_EMPTY_ALL);
 666
 667     // first the version
 668     wxString token = tokenizer.GetNextToken();
 669     if ( token != wxS('0') )
 670         return false;
 671
 672     token = tokenizer.GetNextToken();
 673     if ( !token.ToLong(&l) )
 674         return false;
 675     lf.lfHeight = l;
 676
 677     token = tokenizer.GetNextToken();
 678     if ( !token.ToLong(&l) )
 679         return false;
 680     lf.lfWidth = l;
 681
 682     token = tokenizer.GetNextToken();
 683     if ( !token.ToLong(&l) )
 684         return false;
 685     lf.lfEscapement = l;
 686
 687     token = tokenizer.GetNextToken();
 688     if ( !token.ToLong(&l) )
 689         return false;
 690     lf.lfOrientation = l;
 691
 692     token = tokenizer.GetNextToken();
 693     if ( !token.ToLong(&l) )
 694         return false;
 695     lf.lfWeight = l;
 696
 697     token = tokenizer.GetNextToken();
 698     if ( !token.ToLong(&l) )
 699         return false;
 700     lf.lfItalic = (BYTE)l;
 701
 702     token = tokenizer.GetNextToken();
 703     if ( !token.ToLong(&l) )
 704         return false;
 705     lf.lfUnderline = (BYTE)l;
 706
 707     token = tokenizer.GetNextToken();
 708     if ( !token.ToLong(&l) )
 709         return false;
 710     lf.lfStrikeOut = (BYTE)l;
 711
 712     token = tokenizer.GetNextToken();
 713     if ( !token.ToLong(&l) )
 714         return false;
 715     lf.lfCharSet = (BYTE)l;
 716
 717     token = tokenizer.GetNextToken();
 718     if ( !token.ToLong(&l) )
 719         return false;
 720     lf.lfOutPrecision = (BYTE)l;
 721
 722     token = tokenizer.GetNextToken();
 723     if ( !token.ToLong(&l) )
 724         return false;
 725     lf.lfClipPrecision = (BYTE)l;
 726
 727     token = tokenizer.GetNextToken();
 728     if ( !token.ToLong(&l) )
 729         return false;
 730     lf.lfQuality = (BYTE)l;
 731
 732     token = tokenizer.GetNextToken();
 733     if ( !token.ToLong(&l) )
 734         return false;
 735     lf.lfPitchAndFamily = (BYTE)l;
 736
 737     if ( !tokenizer.HasMoreTokens() )
 738         return false;
 739
 740     // the face name may be empty
 741     SetFaceName(tokenizer.GetNextToken());
 742
 743     return true;
 744 }
 745
 746 wxString wxNativeFontInfo::ToString() const
 747 {
 748     wxString s;
 749
 750     s.Printf(wxS("%d;%ld;%ld;%ld;%ld;%ld;%d;%d;%d;%d;%d;%d;%d;%d;%s"),
 751              0, // version, in case we want to change the format later
 752              lf.lfHeight,
 753              lf.lfWidth,
 754              lf.lfEscapement,
 755              lf.lfOrientation,
 756              lf.lfWeight,
 757              lf.lfItalic,
 758              lf.lfUnderline,
 759              lf.lfStrikeOut,
 760              lf.lfCharSet,
 761              lf.lfOutPrecision,
 762              lf.lfClipPrecision,
 763              lf.lfQuality,
 764              lf.lfPitchAndFamily,
 765              lf.lfFaceName);
 766
 767     return s;
 768 }
 769
 770 // ----------------------------------------------------------------------------
 771 // wxFont
 772 // ----------------------------------------------------------------------------
 773
 774 wxFont::wxFont(const wxString& fontdesc)
 775 {
 776     wxNativeFontInfo info;
 777     if ( info.FromString(fontdesc) )
 778         (void)Create(info);
 779 }
 780
 781 bool wxFont::Create(const wxNativeFontInfo& info, WXHFONT hFont)
 782 {
 783     UnRef();
 784
 785     m_refData = new wxFontRefData(info, hFont);
 786
 787     return RealizeResource();
 788 }
 789
 790 bool wxFont::DoCreate(int pointSize,
 791                       const wxSize& pixelSize,
 792                       bool sizeUsingPixels,
 793                       wxFontFamily family,
 794                       wxFontStyle style,
 795                       wxFontWeight weight,
 796                       bool underlined,
 797                       const wxString& faceName,
 798                       wxFontEncoding encoding)
 799 {
 800     UnRef();
 801
 802     // wxDEFAULT is a valid value for the font size too so we must treat it
 803     // specially here (otherwise the size would be 70 == wxDEFAULT value)
 804     if ( pointSize == wxDEFAULT )
 805     {
 806         pointSize = wxNORMAL_FONT->GetPointSize();
 807     }
 808
 809     m_refData = new wxFontRefData(pointSize, pixelSize, sizeUsingPixels,
 810                                   family, style, weight,
 811                                   underlined, faceName, encoding);
 812
 813     return RealizeResource();
 814 }
 815
 816 wxFont::~wxFont()
 817 {
 818 }
 819
 820 // ----------------------------------------------------------------------------
 821 // real implementation
 822 // ----------------------------------------------------------------------------
 823
 824 wxGDIRefData *wxFont::CreateGDIRefData() const
 825 {
 826     return new wxFontRefData();
 827 }
 828
 829 wxGDIRefData *wxFont::CloneGDIRefData(const wxGDIRefData *data) const
 830 {
 831     return new wxFontRefData(*static_cast<const wxFontRefData *>(data));
 832 }
 833
 834 bool wxFont::RealizeResource()
 835 {
 836     // NOTE: the GetHFONT() call automatically triggers a reallocation of
 837     //       the HFONT if necessary (will do nothing if we already have the resource);
 838     //       it returns NULL only if there is a failure in wxFontRefData::Alloc()...
 839     return GetHFONT() != NULL;
 840 }
 841
 842 bool wxFont::FreeResource(bool WXUNUSED(force))
 843 {
 844     if ( !M_FONTDATA )
 845         return false;
 846
 847     M_FONTDATA->Free();
 848
 849     return true;
 850 }
 851
 852 WXHANDLE wxFont::GetResourceHandle() const
 853 {
 854     return (WXHANDLE)GetHFONT();
 855 }
 856
 857 WXHFONT wxFont::GetHFONT() const
 858 {
 859     // NOTE: wxFontRefData::GetHFONT() will automatically call
 860     //       wxFontRefData::Alloc() if necessary
 861     return M_FONTDATA ? M_FONTDATA->GetHFONT() : 0;
 862 }
 863
 864 bool wxFont::IsFree() const
 865 {
 866     return M_FONTDATA && !M_FONTDATA->HasHFONT();
 867 }
 868
 869 // ----------------------------------------------------------------------------
 870 // change font attribute: we recreate font when doing it
 871 // ----------------------------------------------------------------------------
 872
 873 void wxFont::SetPointSize(int pointSize)
 874 {
 875     AllocExclusive();
 876
 877     M_FONTDATA->Free();
 878     M_FONTDATA->SetPointSize(pointSize);
 879 }
 880
 881 void wxFont::SetPixelSize(const wxSize& pixelSize)
 882 {
 883     AllocExclusive();
 884
 885     M_FONTDATA->SetPixelSize(pixelSize);
 886 }
 887
 888 void wxFont::SetFamily(wxFontFamily family)
 889 {
 890     AllocExclusive();
 891
 892     M_FONTDATA->SetFamily(family);
 893 }
 894
 895 void wxFont::SetStyle(wxFontStyle style)
 896 {
 897     AllocExclusive();
 898
 899     M_FONTDATA->SetStyle(style);
 900 }
 901
 902 void wxFont::SetWeight(wxFontWeight weight)
 903 {
 904     AllocExclusive();
 905
 906     M_FONTDATA->SetWeight(weight);
 907 }
 908
 909 bool wxFont::SetFaceName(const wxString& faceName)
 910 {
 911     AllocExclusive();
 912
 913     if ( !M_FONTDATA->SetFaceName(faceName) )
 914         return false;
 915
 916     // NB: using win32's GetObject() API on M_FONTDATA->GetHFONT()
 917     //     to retrieve a LOGFONT and then compare lf.lfFaceName
 918     //     with given facename is not reliable at all:
 919     //     Windows copies the facename given to ::CreateFontIndirect()
 920     //     without any validity check.
 921     //     Thus we use wxFontBase::SetFaceName to check if facename
 922     //     is valid...
 923     return wxFontBase::SetFaceName(faceName);
 924 }
 925
 926 void wxFont::SetUnderlined(bool underlined)
 927 {
 928     AllocExclusive();
 929
 930     M_FONTDATA->SetUnderlined(underlined);
 931 }
 932
 933 void wxFont::SetEncoding(wxFontEncoding encoding)
 934 {
 935     AllocExclusive();
 936
 937     M_FONTDATA->SetEncoding(encoding);
 938 }
 939
 940 void wxFont::DoSetNativeFontInfo(const wxNativeFontInfo& info)
 941 {
 942     AllocExclusive();
 943
 944     M_FONTDATA->SetNativeFontInfo(info);
 945 }
 946
 947 // ----------------------------------------------------------------------------
 948 // accessors
 949 // ----------------------------------------------------------------------------
 950
 951 int wxFont::GetPointSize() const
 952 {
 953     wxCHECK_MSG( IsOk(), 0, wxT("invalid font") );
 954
 955     return M_FONTDATA->GetPointSize();
 956 }
 957
 958 wxSize wxFont::GetPixelSize() const
 959 {
 960     wxCHECK_MSG( IsOk(), wxDefaultSize, wxT("invalid font") );
 961
 962     return M_FONTDATA->GetPixelSize();
 963 }
 964
 965 bool wxFont::IsUsingSizeInPixels() const
 966 {
 967     wxCHECK_MSG( IsOk(), 0, wxT("invalid font") );
 968
 969     return M_FONTDATA->IsUsingSizeInPixels();
 970 }
 971
 972 wxFontFamily wxFont::DoGetFamily() const
 973 {
 974     return M_FONTDATA->GetFamily();
 975 }
 976
 977 wxFontStyle wxFont::GetStyle() const
 978 {
 979     wxCHECK_MSG( IsOk(), wxFONTSTYLE_MAX, wxT("invalid font") );
 980
 981     return M_FONTDATA->GetStyle();
 982 }
 983
 984 wxFontWeight wxFont::GetWeight() const
 985 {
 986     wxCHECK_MSG( IsOk(), wxFONTWEIGHT_MAX, wxT("invalid font") );
 987
 988     return M_FONTDATA->GetWeight();
 989 }
 990
 991 bool wxFont::GetUnderlined() const
 992 {
 993     wxCHECK_MSG( IsOk(), false, wxT("invalid font") );
 994
 995     return M_FONTDATA->GetUnderlined();
 996 }
 997
 998 wxString wxFont::GetFaceName() const
 999 {
1000     wxCHECK_MSG( IsOk(), wxEmptyString, wxT("invalid font") );
1001
1002     return M_FONTDATA->GetFaceName();
1003 }
1004
1005 wxFontEncoding wxFont::GetEncoding() const
1006 {
1007     wxCHECK_MSG( IsOk(), wxFONTENCODING_DEFAULT, wxT("invalid font") );
1008
1009     return M_FONTDATA->GetEncoding();
1010 }
1011
1012 const wxNativeFontInfo *wxFont::GetNativeFontInfo() const
1013 {
1014     return IsOk() ? &(M_FONTDATA->GetNativeFontInfo()) : NULL;
1015 }
1016
1017 bool wxFont::IsFixedWidth() const
1018 {
1019     wxCHECK_MSG( IsOk(), false, wxT("invalid font") );
1020
1021     // LOGFONT doesn't contain the correct pitch information so we need to call
1022     // GetTextMetrics() to get it
1023     ScreenHDC hdc;
1024     SelectInHDC selectFont(hdc, M_FONTDATA->GetHFONT());
1025
1026     TEXTMETRIC tm;
1027     if ( !::GetTextMetrics(hdc, &tm) )
1028     {
1029         wxLogLastError(wxT("GetTextMetrics"));
1030         return false;
1031     }
1032
1033     // Quoting MSDN description of TMPF_FIXED_PITCH: "Note very carefully that
1034     // those meanings are the opposite of what the constant name implies."
1035     return !(tm.tmPitchAndFamily & TMPF_FIXED_PITCH);
1036 }