src/os2/fontutil.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        msw/fontutil.cpp
   3 // Purpose:     font-related helper functions for wxMSW
   4 // Author:      Modified by David Webster for OS/2
   5 // Modified by:
   6 // Created:     01.03.00
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1999 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows license
  10 ///////////////////////////////////////////////////////////////////////////////
  11 #define DEBUG_PRINTF(NAME)   { static int raz=0; \
  12   printf( #NAME " %i\n",raz); fflush(stdout);       \
  13    raz++;                                        \
  14  }
  15
  16 // ============================================================================
  17 // declarations
  18 // ============================================================================
  19
  20 // ----------------------------------------------------------------------------
  21 // headers
  22 // ----------------------------------------------------------------------------
  23
  24 #ifdef __GNUG__
  25     #pragma implementation "fontutil.h"
  26 #endif
  27
  28 // For compilers that support precompilation, includes "wx.h".
  29 #include "wx/wxprec.h"
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/app.h"
  33     #include "wx/string.h"
  34     #include "wx/log.h"
  35     #include "wx/intl.h"
  36 #endif //WX_PRECOMP
  37
  38 #include "wx/os2/private.h"
  39
  40 #include "wx/fontutil.h"
  41 #include "wx/fontmap.h"
  42
  43 #include "wx/tokenzr.h"
  44
  45 // ============================================================================
  46 // implementation
  47 // ============================================================================
  48
  49 // ----------------------------------------------------------------------------
  50 // wxNativeEncodingInfo
  51 // ----------------------------------------------------------------------------
  52
  53 // convert to/from the string representation: format is
  54 //      encodingid;facename[;charset]
  55
  56 bool wxNativeEncodingInfo::FromString(
  57   const wxString&                   rsStr
  58 )
  59 {
  60     wxStringTokenizer               vTokenizer(rsStr, _T(";"));
  61     wxString                        sEncid = vTokenizer.GetNextToken();
  62     long                            lEnc;
  63
  64     if (!sEncid.ToLong(&lEnc))
  65         return FALSE;
  66     encoding = (wxFontEncoding)lEnc;
  67     facename = vTokenizer.GetNextToken();
  68     if (!facename)
  69         return FALSE;
  70
  71     wxString                        sTmp = vTokenizer.GetNextToken();
  72
  73     if (!sTmp)
  74     {
  75         charset = 850;
  76     }
  77     else
  78     {
  79         if ( wxSscanf(sTmp, _T("%u"), &charset) != 1 )
  80         {
  81             // should be a number!
  82             return FALSE;
  83         }
  84     }
  85     return TRUE;
  86 } // end of wxNativeEncodingInfo::FromString
  87
  88 wxString wxNativeEncodingInfo::ToString() const
  89 {
  90     wxString                        sStr;
  91
  92     sStr << (long)encoding << _T(';') << facename;
  93
  94     if (charset != 850)
  95     {
  96         sStr << _T(';') << charset;
  97     }
  98     return sStr;
  99 } // end of wxNativeEncodingInfo::ToString
 100
 101 // ----------------------------------------------------------------------------
 102 // helper functions
 103 // ----------------------------------------------------------------------------
 104
 105 bool wxGetNativeFontEncoding(
 106   wxFontEncoding                    vEncoding
 107 , wxNativeEncodingInfo*             pInfo
 108 )
 109 {
 110     wxCHECK_MSG(pInfo, FALSE, _T("bad pointer in wxGetNativeFontEncoding") );
 111     if (vEncoding == wxFONTENCODING_DEFAULT)
 112     {
 113         vEncoding = wxFont::GetDefaultEncoding();
 114     }
 115     switch (vEncoding)
 116     {
 117         case wxFONTENCODING_ISO8859_1:
 118         case wxFONTENCODING_ISO8859_15:
 119         case wxFONTENCODING_CP1250:
 120             pInfo->charset = 1250;
 121             break;
 122
 123         case wxFONTENCODING_ISO8859_2:
 124         case wxFONTENCODING_CP1252:
 125             pInfo->charset = 1252;
 126             break;
 127
 128         case wxFONTENCODING_ISO8859_4:
 129         case wxFONTENCODING_ISO8859_10:
 130             pInfo->charset = 921; // what is baltic?
 131             break;
 132
 133         case wxFONTENCODING_ISO8859_5:
 134         case wxFONTENCODING_CP1251:
 135             pInfo->charset = 1251;
 136             break;
 137
 138         case wxFONTENCODING_ISO8859_6:
 139             pInfo->charset = 864;
 140             break;
 141
 142         case wxFONTENCODING_ISO8859_7:
 143             pInfo->charset = 869;
 144             break;
 145
 146         case wxFONTENCODING_ISO8859_8:
 147             pInfo->charset = 862;
 148             break;
 149
 150         case wxFONTENCODING_ISO8859_9:
 151             pInfo->charset = 857;
 152             break;
 153
 154         case wxFONTENCODING_ISO8859_11:
 155             pInfo->charset = 874; // what is thai
 156             break;
 157
 158         case wxFONTENCODING_CP437:
 159             pInfo->charset = 437;
 160             break;
 161
 162         default:
 163             wxFAIL_MSG(wxT("unsupported encoding"));
 164             // fall through
 165
 166         case wxFONTENCODING_SYSTEM:
 167             pInfo->charset = 850;
 168             break;
 169     }
 170     return TRUE;
 171 } // end of wxGetNativeFontEncoding
 172
 173 wxFontEncoding wxGetFontEncFromCharSet(
 174   int                               nCharSet
 175 )
 176 {
 177     wxFontEncoding                  eFontEncoding;
 178
 179     switch (nCharSet)
 180     {
 181         default:
 182         case 1250:
 183             eFontEncoding = wxFONTENCODING_CP1250;
 184             break;
 185
 186         case 1252:
 187             eFontEncoding = wxFONTENCODING_CP1252;
 188             break;
 189
 190         case 921:
 191             eFontEncoding = wxFONTENCODING_ISO8859_4;
 192             break;
 193
 194         case 1251:
 195             eFontEncoding = wxFONTENCODING_CP1251;
 196             break;
 197
 198         case 864:
 199             eFontEncoding = wxFONTENCODING_ISO8859_6;
 200             break;
 201
 202         case 869:
 203             eFontEncoding = wxFONTENCODING_ISO8859_7;
 204             break;
 205
 206         case 862:
 207             eFontEncoding = wxFONTENCODING_ISO8859_8;
 208             break;
 209
 210         case 857:
 211             eFontEncoding = wxFONTENCODING_ISO8859_9;
 212             break;
 213
 214         case 874:
 215             eFontEncoding = wxFONTENCODING_ISO8859_11;
 216             break;
 217
 218         case 437:
 219             eFontEncoding = wxFONTENCODING_CP437;
 220             break;
 221     }
 222     return eFontEncoding;
 223 } // end of wxGetNativeFontEncoding
 224
 225 bool wxTestFontEncoding(
 226   const wxNativeEncodingInfo&       rInfo
 227 )
 228 {
 229     FATTRS                          vLogFont;
 230     HPS                             hPS;
 231
 232     hPS = ::WinGetPS(HWND_DESKTOP);
 233
 234     memset(&vLogFont, '\0', sizeof(FATTRS));           // all default values
 235     vLogFont.usRecordLength = sizeof(FATTRS);
 236     vLogFont.usCodePage = rInfo.charset;
 237     vLogFont.lMaxBaselineExt = 0L;                    // Outline fonts should use 0
 238     vLogFont.lAveCharWidth = 0L;                      // Outline fonts should use 0
 239     vLogFont.fsFontUse = FATTR_FONTUSE_OUTLINE |      // only outline fonts allowed
 240                          FATTR_FONTUSE_TRANSFORMABLE; // may be transformed
 241
 242     strncpy(vLogFont.szFacename, rInfo.facename.c_str(), sizeof(vLogFont.szFacename));
 243
 244     if (!::GpiCreateLogFont( hPS
 245                             ,NULL
 246                             ,1L
 247                             ,&vLogFont
 248                            ))
 249     {
 250         ::WinReleasePS(hPS);
 251         return FALSE;
 252     }
 253     ::WinReleasePS(hPS);
 254     return TRUE;
 255 } // end of wxTestFontEncoding
 256
 257 // ----------------------------------------------------------------------------
 258 // wxFont <-> LOGFONT conversion
 259 // ----------------------------------------------------------------------------
 260
 261 void wxFillLogFont(
 262   LOGFONT*                          pFattrs  // OS2 GPI FATTRS
 263 , PFACENAMEDESC                     pFaceName
 264 , HPS*                              phPS
 265 , bool*                             pbInternalPS
 266 , long*                             pflId
 267 , wxString&                         sFaceName
 268 , wxFont*                           pFont
 269 )
 270 {
 271     LONG                            lNumFonts = 0L;       // For system font count
 272     ERRORID                         vError;               // For logging API errors
 273     LONG                            lTemp = 0L;
 274     bool                            bInternalPS = FALSE;  // if we have to create one
 275     PFONTMETRICS                    pFM = NULL;
 276
 277     //
 278     // Initial house cleaning to free data buffers and ensure we have a
 279     // functional PS to work with
 280     //
 281     if (!*phPS)
 282     {
 283         *phPS = ::WinGetPS(HWND_DESKTOP);
 284         bInternalPS = TRUE;
 285     }
 286
 287     //
 288     // Determine the number of fonts.
 289     //
 290     if((lNumFonts = ::GpiQueryFonts( *phPS
 291                                     ,QF_PUBLIC
 292                                     ,NULL
 293                                     ,&lTemp
 294                                     ,(LONG) sizeof(FONTMETRICS)
 295                                     ,NULL
 296                                    )) < 0L)
 297     {
 298         ERRORID                     vError;
 299         wxString                    sError;
 300
 301         vError = ::WinGetLastError(wxGetInstance());
 302         sError = wxPMErrorToStr(vError);
 303         return;
 304     }
 305
 306     //
 307     // Allocate space for the font metrics.
 308     //
 309     pFM = new FONTMETRICS[lNumFonts + 1];
 310
 311     //
 312     // Retrieve the font metrics.
 313     //
 314     lTemp = lNumFonts;
 315     lTemp = ::GpiQueryFonts( *phPS
 316                             ,QF_PUBLIC
 317                             ,NULL
 318                             ,&lTemp
 319                             ,(LONG) sizeof(FONTMETRICS)
 320                             ,pFM
 321                            );
 322     pFont->SetFM( pFM
 323                  ,(int)lNumFonts
 324                 );
 325
 326     //
 327     // Initialize FATTR and FACENAMEDESC
 328     //
 329     pFattrs->usRecordLength = sizeof(FATTRS);
 330     pFattrs->fsFontUse = FATTR_FONTUSE_OUTLINE |       // only outline fonts allowed
 331                          FATTR_FONTUSE_TRANSFORMABLE;  // may be transformed
 332     pFattrs->fsType = 0;
 333     pFattrs->lMaxBaselineExt = pFattrs->lAveCharWidth = 0;
 334     pFattrs->idRegistry = 0;
 335     pFattrs->lMatch = 0;
 336
 337     pFaceName->usSize = sizeof(FACENAMEDESC);
 338     pFaceName->usWidthClass = FWIDTH_NORMAL;
 339     pFaceName->usReserved = 0;
 340     pFaceName->flOptions = 0;
 341
 342     //
 343     // This does the actual selection of fonts
 344     //
 345     wxOS2SelectMatchingFontByName( pFattrs
 346                                   ,pFaceName
 347                                   ,pFM
 348                                   ,(int)lNumFonts
 349                                   ,pFont
 350                                  );
 351     //
 352     // We should now have the correct FATTRS set with the selected
 353     // font, so now we need to generate an ID
 354     //
 355     long                            lNumLids = ::GpiQueryNumberSetIds(*phPS);
 356     long                            lGpiError;
 357
 358     if(lNumLids )
 359     {
 360         long                        alTypes[255];
 361         STR8                        azNames[255];
 362         long                        alIds[255];
 363
 364         memset(alIds, 0, sizeof(long) * 255);
 365         if(!::GpiQuerySetIds( *phPS
 366                              ,lNumLids
 367                              ,alTypes
 368                              ,azNames
 369                              ,alIds
 370                             ))
 371         {
 372             if (bInternalPS)
 373                 ::WinReleasePS(*phPS);
 374             return;
 375         }
 376         if (*pflId == 0L)
 377             *pflId = 1L;
 378         for(unsigned long LCNum = 0; LCNum < lNumLids; LCNum++)
 379             if(alIds[LCNum] == *pflId)
 380                ++*pflId;
 381         if(*pflId > 254)  // wow, no id available!
 382         {
 383             if (bInternalPS)
 384                ::WinReleasePS(*phPS);
 385            return;
 386         }
 387     }
 388     else
 389         *pflId = 1L;
 390     //
 391     // Release and delete the current font
 392     //
 393     ::GpiSetCharSet(*phPS, LCID_DEFAULT);/* release the font before deleting */
 394     ::GpiDeleteSetId(*phPS, 1L);         /* delete the logical font          */
 395
 396     //
 397     // Now build a facestring
 398     //
 399     char                            zFacename[128];
 400
 401     strcpy(zFacename, pFattrs->szFacename);
 402
 403     if(::GpiQueryFaceString( *phPS
 404                             ,zFacename
 405                             ,pFaceName
 406                             ,FACESIZE
 407                             ,pFattrs->szFacename
 408                            ) == GPI_ERROR)
 409     {
 410         vError = ::WinGetLastError(vHabmain);
 411     }
 412     sFaceName = zFacename;
 413     *pbInternalPS = bInternalPS;
 414
 415     //
 416     // That's it, we now have everything we need to actually create the font
 417     //
 418 } // end of wxFillLogFont
 419
 420 void wxOS2SelectMatchingFontByName(
 421   PFATTRS                           pFattrs
 422 , PFACENAMEDESC                     pFaceName
 423 , PFONTMETRICS                      pFM
 424 , int                               nNumFonts
 425 , const wxFont*                     pFont
 426 )
 427 {
 428     int                             i;
 429     int                             nDiff0;
 430     int                             nPointSize;
 431     int                             nDiff;
 432     int                             nIs;
 433     int                             nMinDiff;
 434     int                             nMinDiff0;
 435     int                             nApirc;
 436     int                             anDiff[16];
 437     int                             anMinDiff[16];
 438     int                             nIndex = 0;
 439     STR8                            zFn;
 440     char                            zFontFaceName[FACESIZE];
 441     wxString                        sFaceName;
 442     USHORT                          usWeightClass;
 443     int                             fsSelection = 0;
 444
 445     nMinDiff0 = 0xf000;
 446     for(i = 0;i < 16; i++)
 447         anMinDiff[i] = nMinDiff0;
 448
 449     switch (pFont->GetFamily())
 450     {
 451         case wxSCRIPT:
 452             sFaceName = wxT("Script");
 453             break;
 454
 455         case wxDECORATIVE:
 456         case wxROMAN:
 457             sFaceName = wxT("Tms Rmn");
 458             break;
 459
 460         case wxTELETYPE:
 461             sFaceName = wxT("Courier") ;
 462             break;
 463
 464         case wxMODERN:
 465             sFaceName = wxT("System VIO") ;
 466             break;
 467
 468         case wxSWISS:
 469             sFaceName = wxT("Helv") ;
 470             break;
 471
 472         case wxDEFAULT:
 473         default:
 474             sFaceName = wxT("System VIO") ;
 475     }
 476
 477     switch (pFont->GetWeight())
 478     {
 479         default:
 480             wxFAIL_MSG(_T("unknown font weight"));
 481             // fall through
 482             usWeightClass = FWEIGHT_DONT_CARE;
 483             break;
 484
 485         case wxNORMAL:
 486             usWeightClass = FWEIGHT_NORMAL;
 487             break;
 488
 489         case wxLIGHT:
 490             usWeightClass = FWEIGHT_LIGHT;
 491             break;
 492
 493         case wxBOLD:
 494             usWeightClass = FWEIGHT_BOLD;
 495             break;
 496
 497          case wxFONTWEIGHT_MAX:
 498             usWeightClass = FWEIGHT_ULTRA_BOLD;
 499             break;
 500     }
 501     pFaceName->usWeightClass = usWeightClass;
 502
 503     switch (pFont->GetStyle())
 504     {
 505         case wxITALIC:
 506         case wxSLANT:
 507             fsSelection = FM_SEL_ITALIC;
 508             pFaceName->flOptions = FTYPE_ITALIC;
 509             break;
 510
 511         default:
 512             wxFAIL_MSG(wxT("unknown font slant"));
 513             // fall through
 514
 515         case wxNORMAL:
 516             fsSelection  = 0;
 517             break;
 518     }
 519
 520     wxStrncpy(zFontFaceName, sFaceName.c_str(), WXSIZEOF(zFontFaceName));
 521     nPointSize = pFont->GetPointSize();
 522
 523     //
 524     // Matching logic to find the right FM struct
 525     //
 526     nIndex = 0;
 527     for(i = 0, nIs = 0; i < nNumFonts; i++)
 528     {
 529         int                         nEmHeight = 0;
 530         int                         nXHeight = 0;
 531
 532         anDiff[0] = wxGpiStrcmp(pFM[i].szFamilyname, zFontFaceName);
 533         anDiff[1] = abs(pFM[i].lEmHeight - nPointSize);
 534         anDiff[2] = abs(pFM[i].usWeightClass -  usWeightClass);
 535         anDiff[3] = abs((pFM[i].fsSelection & 0x2f) -  fsSelection);
 536         if(anDiff[0] == 0)
 537         {
 538             nEmHeight = (int)pFM[i].lEmHeight;
 539             nXHeight  =(int)pFM[i].lXHeight;
 540             if( (nIs & 0x01) == 0)
 541             {
 542                 nIs = 1;
 543                 nIndex = i;
 544                 anMinDiff[1] = anDiff[1];
 545                 anMinDiff[2] = anDiff[2];
 546                 anMinDiff[3] = anDiff[3];
 547             }
 548             else if(anDiff[3] < anMinDiff[3])
 549             {
 550                 nIndex = i;
 551                 anMinDiff[3] = anDiff[3];
 552             }
 553             else if(anDiff[2] < anMinDiff[2])
 554             {
 555                 nIndex = i;
 556                 anMinDiff[2] = anDiff[2];
 557             }
 558             else if(anDiff[1] < anMinDiff[1])
 559             {
 560                 nIndex = i;
 561                 anMinDiff[1] = anDiff[1];
 562             }
 563             anMinDiff[0] = 0;
 564         }
 565         else if(anDiff[0] < anMinDiff[0])
 566         {
 567               nIs = 2;
 568               nIndex = i;
 569               anMinDiff[3] = anDiff[3];
 570               anMinDiff[2] = anDiff[2];
 571               anMinDiff[1] = anDiff[1];
 572               anMinDiff[0] = anDiff[0];
 573         }
 574         else if(anDiff[0] == anMinDiff[0])
 575         {
 576             if(anDiff[3] < anMinDiff[3])
 577             {
 578                 nIndex = i;
 579                 anMinDiff[3] = anDiff[3];
 580                 nIs = 2;
 581             }
 582             else if(anDiff[2] < anMinDiff[2])
 583             {
 584                 nIndex = i;
 585                 anMinDiff[2] = anDiff[2];
 586                 nIs = 2;
 587             }
 588             else if(anDiff[1] < anMinDiff[1])
 589             {
 590                 nIndex = i;
 591                 anMinDiff[1] = anDiff[1];
 592                 nIs = 2;
 593             }
 594         }
 595     }
 596
 597     //
 598     // Fill in the FATTRS with the best match from FONTMETRICS
 599     //
 600     pFattrs->usRecordLength = sizeof(FATTRS);            // sets size of structure
 601     pFattrs->fsSelection    = pFM[nIndex].fsSelection; // uses default selection
 602     pFattrs->lMatch         = pFM[nIndex].lMatch;      // force match
 603     pFattrs->idRegistry     = pFM[nIndex].idRegistry;  // uses default registry
 604     pFattrs->usCodePage     = pFM[nIndex].usCodePage;  // code-page
 605     pFattrs->lMaxBaselineExt = 0;   // OUTLINE fonts need this set to 0 as they use other attributes to match
 606     pFattrs->lAveCharWidth   = 0;   // OUTLINE fonts need this set to 0 as they use other attributes to match
 607     pFattrs->fsType    = 0;// pfm->fsType;              /* uses default type       */
 608     pFattrs->fsFontUse = 0;
 609
 610     wxStrcpy(pFattrs->szFacename, pFM[nIndex].szFacename);
 611     // Debug
 612     strcpy(zFontFaceName, pFM[nIndex].szFacename);
 613     strcpy(zFontFaceName, pFattrs->szFacename);
 614
 615     if(usWeightClass >= FWEIGHT_BOLD)
 616         pFattrs->fsSelection |= FATTR_SEL_BOLD;
 617     if(pFont->GetUnderlined())
 618         pFattrs->fsSelection |= FATTR_SEL_UNDERSCORE;
 619     if(fsSelection & FM_SEL_ITALIC)
 620         pFattrs->fsSelection |= FATTR_SEL_ITALIC;
 621 } // end of wxOS2SelectMatchingFontByName
 622
 623 wxFont wxCreateFontFromLogFont(
 624   const LOGFONT*                    pLogFont
 625 , const PFONTMETRICS                pFM
 626 , PFACENAMEDESC                     pFaceName
 627 )
 628 {
 629     wxNativeFontInfo                vInfo;
 630
 631     vInfo.fa = *pLogFont;
 632     vInfo.fm = *pFM;
 633     vInfo.fn = *pFaceName;
 634     return wxFont(vInfo);
 635 } // end of wxCreateFontFromLogFont
 636
 637 int wxGpiStrcmp(
 638   char*                             s0
 639 , char*                             s1
 640 )
 641 {   int                             l0;
 642     int                             l1;
 643     int                             l;
 644     int                             d;
 645     int                             d1;
 646     int                             i;
 647     int                             rc;
 648
 649     rc = 0;
 650     if(s0 == NULL)
 651     {
 652         if(s1 == NULL)
 653             return 0;
 654         else
 655             return 32;
 656     }
 657     else if(s1 == NULL)
 658         return 32;
 659
 660     l0 = strlen(s0);
 661     l1 = strlen(s1);
 662     l  = l0;
 663     if(l0 != l1)
 664     {
 665         rc++;
 666         if(l1 < l0)
 667             l = l1;
 668     }
 669     for(i=0;i<l;i++)
 670     {
 671         d = s0[i]-s1[i];
 672         if(!d)
 673             continue;
 674         d1 = toupper(s0[i]) - toupper(s1[i]);
 675         if(!d1)
 676             continue;
 677         rc += abs(d);
 678     }
 679     return rc;
 680 }
 681