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 wxConvertVectorFontSize(
 262   FIXED                             fxPointSize
 263 , PFATTRS                           pFattrs
 264 )
 265 {
 266     HPS                             hPS;
 267     HDC                             hDC;
 268     LONG                            lXFontResolution;
 269     LONG                            lYFontResolution;
 270     SIZEF                           vSizef;
 271
 272     hPS = WinGetScreenPS(HWND_DESKTOP); // Screen presentation space
 273
 274     //
 275     //   Query device context for the screen and then query
 276     //   the resolution of the device for the device context.
 277     //
 278
 279     hDC = GpiQueryDevice(hPS);
 280     DevQueryCaps( hDC, CAPS_HORIZONTAL_FONT_RES, (LONG)1, &lXFontResolution);
 281     DevQueryCaps( hDC, CAPS_VERTICAL_FONT_RES, (LONG)1, &lYFontResolution);
 282
 283     //
 284     //   Calculate the size of the character box, based on the
 285     //   point size selected and the resolution of the device.
 286     //   The size parameters are of type FIXED, NOT int.
 287     //   NOTE: 1 point == 1/72 of an inch.
 288     //
 289
 290     vSizef.cx = (FIXED)(((fxPointSize) / 72 ) * lXFontResolution );
 291     vSizef.cy = (FIXED)(((fxPointSize) / 72 ) * lYFontResolution );
 292
 293     pFattrs->lMaxBaselineExt = MAKELONG( HIUSHORT( vSizef.cy ), 0 );
 294     pFattrs->lAveCharWidth   = MAKELONG( HIUSHORT( vSizef.cx ), 0 );
 295     WinReleasePS(hPS);
 296
 297 } // end of wxConvertVectorPointSize
 298
 299 void wxFillLogFont(
 300   LOGFONT*                          pFattrs  // OS2 GPI FATTRS
 301 , PFACENAMEDESC                     pFaceName
 302 , HPS*                              phPS
 303 , bool*                             pbInternalPS
 304 , long*                             pflId
 305 , wxString&                         sFaceName
 306 , wxFont*                           pFont
 307 )
 308 {
 309     LONG                            lNumFonts = 0L;       // For system font count
 310     ERRORID                         vError;               // For logging API errors
 311     LONG                            lTemp = 0L;
 312     bool                            bInternalPS = FALSE;  // if we have to create one
 313     PFONTMETRICS                    pFM = NULL;
 314
 315     //
 316     // Initial house cleaning to free data buffers and ensure we have a
 317     // functional PS to work with
 318     //
 319     if (!*phPS)
 320     {
 321         *phPS = ::WinGetPS(HWND_DESKTOP);
 322         bInternalPS = TRUE;
 323     }
 324
 325     //
 326     // Determine the number of fonts.
 327     //
 328     if((lNumFonts = ::GpiQueryFonts( *phPS
 329                                     ,QF_PUBLIC | QF_PRIVATE
 330                                     ,NULL
 331                                     ,&lTemp
 332                                     ,(LONG) sizeof(FONTMETRICS)
 333                                     ,NULL
 334                                    )) < 0L)
 335     {
 336         ERRORID                     vError;
 337         wxString                    sError;
 338
 339         vError = ::WinGetLastError(wxGetInstance());
 340         sError = wxPMErrorToStr(vError);
 341         return;
 342     }
 343
 344     //
 345     // Allocate space for the font metrics.
 346     //
 347     pFM = new FONTMETRICS[lNumFonts + 1];
 348
 349     //
 350     // Retrieve the font metrics.
 351     //
 352     lTemp = lNumFonts;
 353     lTemp = ::GpiQueryFonts( *phPS
 354                             ,QF_PUBLIC
 355                             ,NULL
 356                             ,&lTemp
 357                             ,(LONG) sizeof(FONTMETRICS)
 358                             ,pFM
 359                            );
 360     pFont->SetFM( pFM
 361                  ,(int)lNumFonts
 362                 );
 363
 364     //
 365     // Initialize FATTR and FACENAMEDESC
 366     //
 367     pFattrs->usRecordLength = sizeof(FATTRS);
 368     pFattrs->fsFontUse = FATTR_FONTUSE_OUTLINE;       // only outline fonts allowed
 369     pFattrs->fsType = 0;
 370     pFattrs->lMaxBaselineExt = pFattrs->lAveCharWidth = 0;
 371     pFattrs->idRegistry = 0;
 372     pFattrs->lMatch = 0;
 373
 374     pFaceName->usSize = sizeof(FACENAMEDESC);
 375     pFaceName->usWeightClass = FWEIGHT_DONT_CARE;
 376     pFaceName->usWidthClass = FWIDTH_DONT_CARE;
 377     pFaceName->usReserved = 0;
 378     pFaceName->flOptions = 0;
 379
 380     //
 381     // This does the actual selection of fonts
 382     //
 383     wxOS2SelectMatchingFontByName( pFattrs
 384                                   ,pFaceName
 385                                   ,pFM
 386                                   ,(int)lNumFonts
 387                                   ,pFont
 388                                  );
 389     //
 390     // We should now have the correct FATTRS set with the selected
 391     // font, so now we need to generate an ID
 392     //
 393     long                            lNumLids = ::GpiQueryNumberSetIds(*phPS);
 394     long                            lGpiError;
 395
 396     if(lNumLids )
 397     {
 398         long                        alTypes[255];
 399         STR8                        azNames[255];
 400         long                        alIds[255];
 401
 402         memset(alIds, 0, sizeof(long) * 255);
 403         if(!::GpiQuerySetIds( *phPS
 404                              ,lNumLids
 405                              ,alTypes
 406                              ,azNames
 407                              ,alIds
 408                             ))
 409         {
 410             if (bInternalPS)
 411                 ::WinReleasePS(*phPS);
 412             return;
 413         }
 414         if (*pflId == 0L)
 415             *pflId = 1L;
 416         for(unsigned long LCNum = 0; LCNum < lNumLids; LCNum++)
 417             if(alIds[LCNum] == *pflId)
 418                ++*pflId;
 419         if(*pflId > 254)  // wow, no id available!
 420         {
 421             if (bInternalPS)
 422                ::WinReleasePS(*phPS);
 423            return;
 424         }
 425     }
 426     else
 427         *pflId = 1L;
 428     //
 429     // Release and delete the current font
 430     //
 431     ::GpiSetCharSet(*phPS, LCID_DEFAULT);/* release the font before deleting */
 432     ::GpiDeleteSetId(*phPS, 1L);         /* delete the logical font          */
 433
 434     //
 435     // Now build a facestring
 436     //
 437     char                            zFacename[128];
 438
 439     strcpy(zFacename, pFattrs->szFacename);
 440
 441     if(::GpiQueryFaceString( *phPS
 442                             ,zFacename
 443                             ,pFaceName
 444                             ,FACESIZE
 445                             ,pFattrs->szFacename
 446                            ) == GPI_ERROR)
 447     {
 448         vError = ::WinGetLastError(vHabmain);
 449     }
 450     sFaceName = zFacename;
 451     *pbInternalPS = bInternalPS;
 452
 453     //
 454     // That's it, we now have everything we need to actually create the font
 455     //
 456 } // end of wxFillLogFont
 457
 458 void wxOS2SelectMatchingFontByName(
 459   PFATTRS                           pFattrs
 460 , PFACENAMEDESC                     pFaceName
 461 , PFONTMETRICS                      pFM
 462 , int                               nNumFonts
 463 , const wxFont*                     pFont
 464 )
 465 {
 466     int                             i;
 467     int                             nDiff0;
 468     int                             nPointSize;
 469     int                             nDiff;
 470     int                             nIs;
 471     int                             nMinDiff;
 472     int                             nMinDiff0;
 473     int                             nApirc;
 474     int                             anDiff[16];
 475     int                             anMinDiff[16];
 476     int                             nIndex = 0;
 477     STR8                            zFn;
 478     char                            zFontFaceName[FACESIZE];
 479     wxString                        sFaceName;
 480     USHORT                          usWeightClass;
 481     int                             fsSelection = 0;
 482
 483     nMinDiff0 = 0xf000;
 484     for(i = 0;i < 16; i++)
 485         anMinDiff[i] = nMinDiff0;
 486
 487     switch (pFont->GetFamily())
 488     {
 489         case wxSCRIPT:
 490             sFaceName = wxT("Script");
 491             break;
 492
 493         case wxDECORATIVE:
 494             sFaceName = wxT("WarpSans");
 495             break;
 496
 497         case wxROMAN:
 498             sFaceName = wxT("Times New Roman");
 499             break;
 500
 501         case wxTELETYPE:
 502             sFaceName = wxT("Courier New") ;
 503             break;
 504
 505         case wxMODERN:
 506             sFaceName = wxT("Courier New") ;
 507             break;
 508
 509         case wxSWISS:
 510             sFaceName = wxT("Helv") ;
 511             break;
 512
 513         case wxDEFAULT:
 514         default:
 515             sFaceName = wxT("System VIO") ;
 516     }
 517
 518     switch (pFont->GetWeight())
 519     {
 520         default:
 521             wxFAIL_MSG(_T("unknown font weight"));
 522             // fall through
 523             usWeightClass = FWEIGHT_DONT_CARE;
 524             break;
 525
 526         case wxNORMAL:
 527             usWeightClass = FWEIGHT_NORMAL;
 528             break;
 529
 530         case wxLIGHT:
 531             usWeightClass = FWEIGHT_LIGHT;
 532             break;
 533
 534         case wxBOLD:
 535             usWeightClass = FWEIGHT_BOLD;
 536             break;
 537
 538          case wxFONTWEIGHT_MAX:
 539             usWeightClass = FWEIGHT_ULTRA_BOLD;
 540             break;
 541     }
 542     pFaceName->usWeightClass = usWeightClass;
 543
 544     switch (pFont->GetStyle())
 545     {
 546         case wxITALIC:
 547         case wxSLANT:
 548             fsSelection = FM_SEL_ITALIC;
 549             pFaceName->flOptions = FTYPE_ITALIC;
 550             break;
 551
 552         default:
 553             wxFAIL_MSG(wxT("unknown font slant"));
 554             // fall through
 555
 556         case wxNORMAL:
 557             fsSelection  = 0;
 558             break;
 559     }
 560
 561     wxStrncpy(zFontFaceName, sFaceName.c_str(), WXSIZEOF(zFontFaceName));
 562     nPointSize = pFont->GetPointSize();
 563
 564     //
 565     // Matching logic to find the right FM struct
 566     //
 567     nIndex = 0;
 568     for(i = 0, nIs = 0; i < nNumFonts; i++)
 569     {
 570         int                         nEmHeight = 0;
 571         int                         nXHeight = 0;
 572
 573         anDiff[0] = wxGpiStrcmp(pFM[i].szFacename, zFontFaceName);
 574         anDiff[1] = abs(pFM[i].lEmHeight - nPointSize);
 575         anDiff[2] = abs(pFM[i].usWeightClass -  usWeightClass);
 576         anDiff[3] = abs((pFM[i].fsSelection & 0x2f) -  fsSelection);
 577         if(anDiff[0] == 0)
 578         {
 579             nEmHeight = (int)pFM[i].lEmHeight;
 580             nXHeight  =(int)pFM[i].lXHeight;
 581             if( (nIs & 0x01) == 0)
 582             {
 583                 nIs = 1;
 584                 nIndex = i;
 585                 anMinDiff[1] = anDiff[1];
 586                 anMinDiff[2] = anDiff[2];
 587                 anMinDiff[3] = anDiff[3];
 588             }
 589             else if(anDiff[3] < anMinDiff[3])
 590             {
 591                 nIndex = i;
 592                 anMinDiff[3] = anDiff[3];
 593             }
 594             else if(anDiff[2] < anMinDiff[2])
 595             {
 596                 nIndex = i;
 597                 anMinDiff[2] = anDiff[2];
 598             }
 599             else if(anDiff[1] < anMinDiff[1])
 600             {
 601                 nIndex = i;
 602                 anMinDiff[1] = anDiff[1];
 603             }
 604             anMinDiff[0] = 0;
 605         }
 606         else if(anDiff[0] < anMinDiff[0])
 607         {
 608               nIs = 2;
 609               nIndex = i;
 610               anMinDiff[3] = anDiff[3];
 611               anMinDiff[2] = anDiff[2];
 612               anMinDiff[1] = anDiff[1];
 613               anMinDiff[0] = anDiff[0];
 614         }
 615         else if(anDiff[0] == anMinDiff[0])
 616         {
 617             if(anDiff[3] < anMinDiff[3])
 618             {
 619                 nIndex = i;
 620                 anMinDiff[3] = anDiff[3];
 621                 nIs = 2;
 622             }
 623             else if(anDiff[2] < anMinDiff[2])
 624             {
 625                 nIndex = i;
 626                 anMinDiff[2] = anDiff[2];
 627                 nIs = 2;
 628             }
 629             else if(anDiff[1] < anMinDiff[1])
 630             {
 631                 nIndex = i;
 632                 anMinDiff[1] = anDiff[1];
 633                 nIs = 2;
 634             }
 635         }
 636     }
 637
 638     //
 639     // Fill in the FATTRS with the best match from FONTMETRICS
 640     //
 641     pFattrs->usRecordLength  = sizeof(FATTRS);              // Sets size of structure
 642     pFattrs->lMatch          = pFM[nIndex].lMatch;          // Force match
 643     pFattrs->idRegistry      = 0;                           // Registry
 644     pFattrs->usCodePage      = 0;                           // Match proper CodePage
 645     pFattrs->fsFontUse       = 0;                           // Use only outline fonts
 646     pFattrs->fsType          = 0;                           // Use only outline fonts
 647     pFattrs->lMaxBaselineExt = 0;                           // Use only outline fonts
 648     pFattrs->lAveCharWidth   = 0;                           // Use only outline fonts
 649     wxStrcpy(pFattrs->szFacename, pFM[nIndex].szFacename);
 650     if (pFont->GetWeight() == wxNORMAL)
 651         pFattrs->fsSelection = 0;
 652     else
 653         pFattrs->fsSelection = FATTR_SEL_BOLD;
 654
 655     if (pFont->GetStyle() == wxITALIC || pFont->GetStyle() == wxSLANT)
 656         pFattrs->fsSelection |= FATTR_SEL_ITALIC;
 657
 658     if (pFont->GetUnderlined())
 659         pFattrs->fsSelection |= FATTR_SEL_UNDERSCORE;
 660 } // end of wxOS2SelectMatchingFontByName
 661
 662 wxFont wxCreateFontFromLogFont(
 663   const LOGFONT*                    pLogFont
 664 , const PFONTMETRICS                pFM
 665 , PFACENAMEDESC                     pFaceName
 666 )
 667 {
 668     wxNativeFontInfo                vInfo;
 669
 670     vInfo.fa = *pLogFont;
 671     vInfo.fm = *pFM;
 672     vInfo.fn = *pFaceName;
 673     return wxFont(vInfo);
 674 } // end of wxCreateFontFromLogFont
 675
 676 int wxGpiStrcmp(
 677   char*                             s0
 678 , char*                             s1
 679 )
 680 {   int                             l0;
 681     int                             l1;
 682     int                             l;
 683     int                             d;
 684     int                             d1;
 685     int                             i;
 686     int                             rc;
 687
 688     rc = 0;
 689     if(s0 == NULL)
 690     {
 691         if(s1 == NULL)
 692             return 0;
 693         else
 694             return 32;
 695     }
 696     else if(s1 == NULL)
 697         return 32;
 698
 699     l0 = strlen(s0);
 700     l1 = strlen(s1);
 701     l  = l0;
 702     if(l0 != l1)
 703     {
 704         rc++;
 705         if(l1 < l0)
 706             l = l1;
 707     }
 708     for(i=0;i<l;i++)
 709     {
 710         d = s0[i]-s1[i];
 711         if(!d)
 712             continue;
 713         d1 = toupper(s0[i]) - toupper(s1[i]);
 714         if(!d1)
 715             continue;
 716         rc += abs(d);
 717     }
 718     return rc;
 719 }
 720