src/msw/fontutil.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        msw/fontutil.cpp
   3 // Purpose:     font-related helper functions for wxMSW
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     05.11.99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1999 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows license
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "fontutil.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/string.h"
  33     #include "wx/log.h"
  34     #include "wx/intl.h"
  35 #endif //WX_PRECOMP
  36
  37 #include "wx/msw/private.h"
  38
  39 #include "wx/fontutil.h"
  40 #include "wx/fontmap.h"
  41
  42 #include "wx/tokenzr.h"
  43
  44 // ============================================================================
  45 // implementation
  46 // ============================================================================
  47
  48 // ----------------------------------------------------------------------------
  49 // wxNativeEncodingInfo
  50 // ----------------------------------------------------------------------------
  51
  52 // convert to/from the string representation: format is
  53 //      encodingid;facename[;charset]
  54
  55 bool wxNativeEncodingInfo::FromString(const wxString& s)
  56 {
  57     wxStringTokenizer tokenizer(s, _T(";"));
  58
  59     wxString encid = tokenizer.GetNextToken();
  60     long enc;
  61     if ( !encid.ToLong(&enc) )
  62         return FALSE;
  63     encoding = (wxFontEncoding)enc;
  64
  65     facename = tokenizer.GetNextToken();
  66     if ( !facename )
  67         return FALSE;
  68
  69     wxString tmp = tokenizer.GetNextToken();
  70     if ( !tmp )
  71     {
  72         // default charset (don't use DEFAULT_CHARSET though because of subtle
  73         // Windows 9x/NT differences in handling it)
  74         charset = ANSI_CHARSET;
  75     }
  76     else
  77     {
  78         if ( wxSscanf(tmp, _T("%u"), &charset) != 1 )
  79         {
  80             // should be a number!
  81             return FALSE;
  82         }
  83     }
  84
  85     return TRUE;
  86 }
  87
  88 wxString wxNativeEncodingInfo::ToString() const
  89 {
  90     wxString s;
  91
  92     s << (long)encoding << _T(';') << facename;
  93     if ( charset != ANSI_CHARSET )
  94     {
  95          s << _T(';') << charset;
  96     }
  97
  98     return s;
  99 }
 100
 101 // ----------------------------------------------------------------------------
 102 // helper functions
 103 // ----------------------------------------------------------------------------
 104
 105 bool wxGetNativeFontEncoding(wxFontEncoding encoding,
 106                              wxNativeEncodingInfo *info)
 107 {
 108     wxCHECK_MSG( info, FALSE, _T("bad pointer in wxGetNativeFontEncoding") );
 109
 110     if ( encoding == wxFONTENCODING_DEFAULT )
 111     {
 112         encoding = wxFont::GetDefaultEncoding();
 113     }
 114
 115     switch ( encoding )
 116     {
 117         // although this function is supposed to return an exact match, do do
 118         // some mappings here for the most common case of "standard" encoding
 119         case wxFONTENCODING_SYSTEM:
 120         case wxFONTENCODING_ISO8859_1:
 121         case wxFONTENCODING_ISO8859_15:
 122         case wxFONTENCODING_CP1252:
 123             info->charset = ANSI_CHARSET;
 124             break;
 125
 126 #if !defined(__WIN16__)
 127         case wxFONTENCODING_CP1250:
 128             info->charset = EASTEUROPE_CHARSET;
 129             break;
 130
 131         case wxFONTENCODING_CP1251:
 132             info->charset = RUSSIAN_CHARSET;
 133             break;
 134
 135         case wxFONTENCODING_CP1253:
 136             info->charset = GREEK_CHARSET;
 137             break;
 138
 139         case wxFONTENCODING_CP1254:
 140             info->charset = TURKISH_CHARSET;
 141             break;
 142
 143         case wxFONTENCODING_CP1255:
 144             info->charset = HEBREW_CHARSET;
 145             break;
 146
 147         case wxFONTENCODING_CP1256:
 148             info->charset = ARABIC_CHARSET;
 149             break;
 150
 151         case wxFONTENCODING_CP1257:
 152             info->charset = BALTIC_CHARSET;
 153             break;
 154
 155         case wxFONTENCODING_CP874:
 156             info->charset = THAI_CHARSET;
 157             break;
 158 #endif // !Win16
 159
 160         case wxFONTENCODING_CP437:
 161             info->charset = OEM_CHARSET;
 162             break;
 163
 164         default:
 165             // no way to translate this encoding into a Windows charset
 166             return FALSE;
 167     }
 168
 169     info->encoding = encoding;
 170
 171     return TRUE;
 172 }
 173
 174 bool wxTestFontEncoding(const wxNativeEncodingInfo& info)
 175 {
 176     // try to create such font
 177     LOGFONT lf;
 178     wxZeroMemory(lf);       // all default values
 179
 180     lf.lfCharSet = info.charset;
 181     wxStrncpy(lf.lfFaceName, info.facename, sizeof(lf.lfFaceName));
 182
 183     HFONT hfont = ::CreateFontIndirect(&lf);
 184     if ( !hfont )
 185     {
 186         // no such font
 187         return FALSE;
 188     }
 189
 190     ::DeleteObject((HGDIOBJ)hfont);
 191
 192     return TRUE;
 193 }
 194
 195 // ----------------------------------------------------------------------------
 196 // wxFontEncoding <-> CHARSET_XXX
 197 // ----------------------------------------------------------------------------
 198
 199 wxFontEncoding wxGetFontEncFromCharSet(int cs)
 200 {
 201     wxFontEncoding fontEncoding;
 202
 203     switch ( cs )
 204     {
 205         default:
 206             // JACS: Silently using ANSI_CHARSET
 207             // apparently works for Chinese Windows. Assume it works
 208             // for all/most other languages.
 209             //wxFAIL_MSG(wxT("unsupported charset"));
 210             // fall through
 211
 212         case ANSI_CHARSET:
 213             fontEncoding = wxFONTENCODING_CP1252;
 214             break;
 215
 216 #ifdef __WIN32__
 217         case EASTEUROPE_CHARSET:
 218             fontEncoding = wxFONTENCODING_CP1250;
 219             break;
 220
 221         case BALTIC_CHARSET:
 222             fontEncoding = wxFONTENCODING_CP1257;
 223             break;
 224
 225         case RUSSIAN_CHARSET:
 226             fontEncoding = wxFONTENCODING_CP1251;
 227             break;
 228
 229         case ARABIC_CHARSET:
 230             fontEncoding = wxFONTENCODING_CP1256;
 231             break;
 232
 233         case GREEK_CHARSET:
 234             fontEncoding = wxFONTENCODING_CP1253;
 235             break;
 236
 237         case HEBREW_CHARSET:
 238             fontEncoding = wxFONTENCODING_CP1255;
 239             break;
 240
 241         case TURKISH_CHARSET:
 242             fontEncoding = wxFONTENCODING_CP1254;
 243             break;
 244
 245         case THAI_CHARSET:
 246             fontEncoding = wxFONTENCODING_CP437;
 247             break;
 248 #endif // Win32
 249
 250         case OEM_CHARSET:
 251             fontEncoding = wxFONTENCODING_CP437;
 252             break;
 253     }
 254
 255     return fontEncoding;
 256 }
 257
 258 // ----------------------------------------------------------------------------
 259 // wxFont <-> LOGFONT conversion
 260 // ----------------------------------------------------------------------------
 261
 262 void wxFillLogFont(LOGFONT *logFont, const wxFont *font)
 263 {
 264     int ff_family;
 265     wxString ff_face;
 266
 267     switch ( font->GetFamily() )
 268     {
 269         case wxSCRIPT:
 270             ff_family = FF_SCRIPT;
 271             ff_face = _T("Script");
 272             break;
 273
 274         case wxDECORATIVE:
 275             ff_family = FF_DECORATIVE;
 276             break;
 277
 278         case wxROMAN:
 279             ff_family = FF_ROMAN;
 280             ff_face = _T("Times New Roman");
 281             break;
 282
 283         case wxTELETYPE:
 284         case wxMODERN:
 285             ff_family = FF_MODERN;
 286             ff_face = _T("Courier New");
 287             break;
 288
 289         case wxSWISS:
 290             ff_family = FF_SWISS;
 291             ff_face = _T("Arial");
 292             break;
 293
 294         case wxDEFAULT:
 295         default:
 296             ff_family = FF_SWISS;
 297             ff_face = _T("MS Sans Serif");
 298     }
 299
 300     BYTE ff_italic;
 301     switch ( font->GetStyle() )
 302     {
 303         case wxITALIC:
 304         case wxSLANT:
 305             ff_italic = 1;
 306             break;
 307
 308         default:
 309             wxFAIL_MSG(wxT("unknown font slant"));
 310             // fall through
 311
 312         case wxNORMAL:
 313             ff_italic = 0;
 314     }
 315
 316     int ff_weight;
 317     switch ( font->GetWeight() )
 318     {
 319         default:
 320             wxFAIL_MSG(_T("unknown font weight"));
 321             // fall through
 322
 323         case wxNORMAL:
 324             ff_weight = FW_NORMAL;
 325             break;
 326
 327         case wxLIGHT:
 328             ff_weight = FW_LIGHT;
 329             break;
 330
 331         case wxBOLD:
 332             ff_weight = FW_BOLD;
 333             break;
 334     }
 335
 336     // VZ: I'm reverting this as we clearly must use the real screen
 337     //     resolution instead of hardcoded one or it surely will fail to work
 338     //     in some cases.
 339     //
 340     //     If there are any problems with this code, please let me know about
 341     //     it instead of reverting this change, thanks!
 342 #if 1 // wxUSE_SCREEN_DPI
 343     const int ppInch = ::GetDeviceCaps(ScreenHDC(), LOGPIXELSY);
 344 #else // 0
 345     // New behaviour: apparently ppInch varies according to Large/Small Fonts
 346     // setting in Windows. This messes up fonts. So, set ppInch to a constant
 347     // 96 dpi.
 348     static const int ppInch = 96;
 349 #endif // 1/0
 350
 351     int pointSize = font->GetPointSize();
 352 #if wxFONT_SIZE_COMPATIBILITY
 353     // Incorrect, but compatible with old wxWindows behaviour
 354     int nHeight = (pointSize*ppInch)/72;
 355 #else
 356     // Correct for Windows compatibility
 357     int nHeight = -(int)((pointSize*((double)ppInch)/72.0) + 0.5);
 358 #endif
 359
 360     wxString facename = font->GetFaceName();
 361     if ( !!facename )
 362     {
 363         ff_face = facename;
 364     }
 365     //else: ff_face is a reasonable default facename for this font family
 366
 367     // deal with encoding now
 368     wxNativeEncodingInfo info;
 369     wxFontEncoding encoding = font->GetEncoding();
 370     if ( !wxGetNativeFontEncoding(encoding, &info) )
 371     {
 372         if ( !wxTheFontMapper->GetAltForEncoding(encoding, &info) )
 373         {
 374             // unsupported encoding, replace with the default
 375             info.charset = ANSI_CHARSET;
 376         }
 377     }
 378
 379     if ( !info.facename.IsEmpty() )
 380     {
 381         // the facename determined by the encoding overrides everything else
 382         ff_face = info.facename;
 383     }
 384
 385     // transfer all the data to LOGFONT
 386     logFont->lfHeight = nHeight;
 387     logFont->lfWidth = 0;
 388     logFont->lfEscapement = 0;
 389     logFont->lfOrientation = 0;
 390     logFont->lfWeight = ff_weight;
 391     logFont->lfItalic = ff_italic;
 392     logFont->lfUnderline = (BYTE)font->GetUnderlined();
 393     logFont->lfStrikeOut = 0;
 394     logFont->lfCharSet = info.charset;
 395     logFont->lfOutPrecision = OUT_DEFAULT_PRECIS;
 396     logFont->lfClipPrecision = CLIP_DEFAULT_PRECIS;
 397     logFont->lfQuality = PROOF_QUALITY;
 398     logFont->lfPitchAndFamily = DEFAULT_PITCH | ff_family;
 399     wxStrncpy(logFont->lfFaceName, ff_face, WXSIZEOF(logFont->lfFaceName));
 400 }
 401
 402 wxFont wxCreateFontFromLogFont(const LOGFONT *logFont)
 403 {
 404     wxNativeFontInfo info;
 405
 406     info.lf = *logFont;
 407
 408     return wxFont(info);
 409 }
 410