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         if(!::GpiQuerySetIds( *phPS
 365                              ,lNumLids
 366                              ,alTypes
 367                              ,azNames
 368                              ,alIds
 369                             ))
 370         {
 371             if (bInternalPS)
 372                 ::WinReleasePS(*phPS);
 373             return;
 374         }
 375
 376         for(unsigned long LCNum = 0; LCNum < lNumLids; LCNum++)
 377             if(alIds[LCNum] == *pflId)
 378                ++*pflId;
 379         if(*pflId > 254)  // wow, no id available!
 380         {
 381             if (bInternalPS)
 382                ::WinReleasePS(*phPS);
 383            return;
 384         }
 385     }
 386     else
 387         *pflId = 1L;
 388     //
 389     // Release and delete the current font
 390     //
 391     ::GpiSetCharSet(*phPS, LCID_DEFAULT);/* release the font before deleting */
 392     ::GpiDeleteSetId(*phPS, 1L);         /* delete the logical font          */
 393
 394     //
 395     // Now build a facestring
 396     //
 397     char                            zFacename[128];
 398
 399     strcpy(zFacename, pFattrs->szFacename);
 400
 401     if(::GpiQueryFaceString( *phPS
 402                             ,zFacename
 403                             ,pFaceName
 404                             ,FACESIZE
 405                             ,pFattrs->szFacename
 406                            ) == GPI_ERROR)
 407     {
 408         vError = ::WinGetLastError(vHabmain);
 409     }
 410     sFaceName = zFacename;
 411     *pbInternalPS = bInternalPS;
 412
 413     //
 414     // That's it, we now have everything we need to actually create the font
 415     //
 416 } // end of wxFillLogFont
 417
 418 void wxOS2SelectMatchingFontByName(
 419   PFATTRS                           pFattrs
 420 , PFACENAMEDESC                     pFaceName
 421 , PFONTMETRICS                      pFM
 422 , int                               nNumFonts
 423 , const wxFont*                     pFont
 424 )
 425 {
 426     int                             i;
 427     int                             nDiff0;
 428     int                             nPointSize;
 429     int                             nDiff;
 430     int                             nIs;
 431     int                             nMinDiff;
 432     int                             nMinDiff0;
 433     int                             nApirc;
 434     int                             anDiff[16];
 435     int                             anMinDiff[16];
 436     int                             nIndex = 0;
 437     STR8                            zFn;
 438     char                            zFontFaceName[FACESIZE];
 439     wxString                        sFaceName;
 440     USHORT                          usWeightClass;
 441     int                             fsSelection = 0;
 442
 443     nMinDiff0 = 0xf000;
 444     for(i = 0;i < 16; i++)
 445         anMinDiff[i] = nMinDiff0;
 446
 447     switch (pFont->GetFamily())
 448     {
 449         case wxSCRIPT:
 450             sFaceName = wxT("Script");
 451             break;
 452
 453         case wxDECORATIVE:
 454         case wxROMAN:
 455             sFaceName = wxT("Tms Rmn");
 456             break;
 457
 458         case wxTELETYPE:
 459             sFaceName = wxT("Courier") ;
 460             break;
 461
 462         case wxMODERN:
 463             sFaceName = wxT("System VIO") ;
 464             break;
 465
 466         case wxSWISS:
 467             sFaceName = wxT("Helv") ;
 468             break;
 469
 470         case wxDEFAULT:
 471         default:
 472             sFaceName = wxT("System VIO") ;
 473     }
 474
 475     switch (pFont->GetWeight())
 476     {
 477         default:
 478             wxFAIL_MSG(_T("unknown font weight"));
 479             // fall through
 480             usWeightClass = FWEIGHT_DONT_CARE;
 481             break;
 482
 483         case wxNORMAL:
 484             usWeightClass = FWEIGHT_NORMAL;
 485             break;
 486
 487         case wxLIGHT:
 488             usWeightClass = FWEIGHT_LIGHT;
 489             break;
 490
 491         case wxBOLD:
 492             usWeightClass = FWEIGHT_BOLD;
 493             break;
 494
 495          case wxFONTWEIGHT_MAX:
 496             usWeightClass = FWEIGHT_ULTRA_BOLD;
 497             break;
 498     }
 499     pFaceName->usWeightClass = usWeightClass;
 500
 501     switch (pFont->GetStyle())
 502     {
 503         case wxITALIC:
 504         case wxSLANT:
 505             fsSelection = FM_SEL_ITALIC;
 506             pFaceName->flOptions = FTYPE_ITALIC;
 507             break;
 508
 509         default:
 510             wxFAIL_MSG(wxT("unknown font slant"));
 511             // fall through
 512
 513         case wxNORMAL:
 514             fsSelection  = 0;
 515             break;
 516     }
 517
 518     wxStrncpy(zFontFaceName, sFaceName.c_str(), WXSIZEOF(zFontFaceName));
 519     nPointSize = pFont->GetPointSize();
 520
 521     //
 522     // Matching logic to find the right FM struct
 523     //
 524     nIndex = 0;
 525     for(i = 0, nIs = 0; i < nNumFonts; i++)
 526     {
 527         int                         nEmHeight = 0;
 528         int                         nXHeight = 0;
 529
 530         anDiff[0] = wxGpiStrcmp(pFM[i].szFamilyname, zFontFaceName);
 531         anDiff[1] = abs(pFM[i].lEmHeight - nPointSize);
 532         anDiff[2] = abs(pFM[i].usWeightClass -  usWeightClass);
 533         anDiff[3] = abs((pFM[i].fsSelection & 0x2f) -  fsSelection);
 534         if(anDiff[0] == 0)
 535         {
 536             nEmHeight = (int)pFM[i].lEmHeight;
 537             nXHeight  =(int)pFM[i].lXHeight;
 538             if( (nIs & 0x01) == 0)
 539             {
 540                 nIs = 1;
 541                 nIndex = i;
 542                 anMinDiff[1] = anDiff[1];
 543                 anMinDiff[2] = anDiff[2];
 544                 anMinDiff[3] = anDiff[3];
 545             }
 546             else if(anDiff[3] < anMinDiff[3])
 547             {
 548                 nIndex = i;
 549                 anMinDiff[3] = anDiff[3];
 550             }
 551             else if(anDiff[2] < anMinDiff[2])
 552             {
 553                 nIndex = i;
 554                 anMinDiff[2] = anDiff[2];
 555             }
 556             else if(anDiff[1] < anMinDiff[1])
 557             {
 558                 nIndex = i;
 559                 anMinDiff[1] = anDiff[1];
 560             }
 561             anMinDiff[0] = 0;
 562         }
 563         else if(anDiff[0] < anMinDiff[0])
 564         {
 565               nIs = 2;
 566               nIndex = i;
 567               anMinDiff[3] = anDiff[3];
 568               anMinDiff[2] = anDiff[2];
 569               anMinDiff[1] = anDiff[1];
 570               anMinDiff[0] = anDiff[0];
 571         }
 572         else if(anDiff[0] == anMinDiff[0])
 573         {
 574             if(anDiff[3] < anMinDiff[3])
 575             {
 576                 nIndex = i;
 577                 anMinDiff[3] = anDiff[3];
 578                 nIs = 2;
 579             }
 580             else if(anDiff[2] < anMinDiff[2])
 581             {
 582                 nIndex = i;
 583                 anMinDiff[2] = anDiff[2];
 584                 nIs = 2;
 585             }
 586             else if(anDiff[1] < anMinDiff[1])
 587             {
 588                 nIndex = i;
 589                 anMinDiff[1] = anDiff[1];
 590                 nIs = 2;
 591             }
 592         }
 593     }
 594
 595     //
 596     // Fill in the FATTRS with the best match from FONTMETRICS
 597     //
 598     pFattrs->usRecordLength = sizeof(FATTRS);            // sets size of structure
 599     pFattrs->fsSelection    = pFM[nIndex].fsSelection; // uses default selection
 600     pFattrs->lMatch         = pFM[nIndex].lMatch;      // force match
 601     pFattrs->idRegistry     = pFM[nIndex].idRegistry;  // uses default registry
 602     pFattrs->usCodePage     = pFM[nIndex].usCodePage;  // code-page
 603     pFattrs->lMaxBaselineExt = 0;   // OUTLINE fonts need this set to 0 as they use other attributes to match
 604     pFattrs->lAveCharWidth   = 0;   // OUTLINE fonts need this set to 0 as they use other attributes to match
 605     pFattrs->fsType    = 0;// pfm->fsType;              /* uses default type       */
 606     pFattrs->fsFontUse = 0;
 607
 608     wxStrcpy(pFattrs->szFacename, pFM[nIndex].szFacename);
 609     // Debug
 610     strcpy(zFontFaceName, pFM[nIndex].szFacename);
 611     strcpy(zFontFaceName, pFattrs->szFacename);
 612
 613     if(usWeightClass >= FWEIGHT_BOLD)
 614         pFattrs->fsSelection |= FATTR_SEL_BOLD;
 615     if(pFont->GetUnderlined())
 616         pFattrs->fsSelection |= FATTR_SEL_UNDERSCORE;
 617     if(fsSelection & FM_SEL_ITALIC)
 618         pFattrs->fsSelection |= FATTR_SEL_ITALIC;
 619 } // end of wxOS2SelectMatchingFontByName
 620
 621 wxFont wxCreateFontFromLogFont(
 622   const LOGFONT*                    pLogFont
 623 , const PFONTMETRICS                pFM
 624 , PFACENAMEDESC                     pFaceName
 625 )
 626 {
 627     wxNativeFontInfo                vInfo;
 628
 629     vInfo.fa = *pLogFont;
 630     vInfo.fm = *pFM;
 631     vInfo.fn = *pFaceName;
 632     return wxFont(vInfo);
 633 } // end of wxCreateFontFromLogFont
 634
 635 int wxGpiStrcmp(
 636   char*                             s0
 637 , char*                             s1
 638 )
 639 {   int                             l0;
 640     int                             l1;
 641     int                             l;
 642     int                             d;
 643     int                             d1;
 644     int                             i;
 645     int                             rc;
 646
 647     rc = 0;
 648     if(s0 == NULL)
 649     {
 650         if(s1 == NULL)
 651             return 0;
 652         else
 653             return 32;
 654     }
 655     else if(s1 == NULL)
 656         return 32;
 657
 658     l0 = strlen(s0);
 659     l1 = strlen(s1);
 660     l  = l0;
 661     if(l0 != l1)
 662     {
 663         rc++;
 664         if(l1 < l0)
 665             l = l1;
 666     }
 667     for(i=0;i<l;i++)
 668     {
 669         d = s0[i]-s1[i];
 670         if(!d)
 671             continue;
 672         d1 = toupper(s0[i]) - toupper(s1[i]);
 673         if(!d1)
 674             continue;
 675         rc += abs(d);
 676     }
 677     return rc;
 678 }
 679