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 licence
  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 #include "wx/encinfo.h"
  43
  44 #include "wx/tokenzr.h"
  45
  46 // ============================================================================
  47 // implementation
  48 // ============================================================================
  49
  50 // ----------------------------------------------------------------------------
  51 // wxNativeEncodingInfo
  52 // ----------------------------------------------------------------------------
  53
  54 // convert to/from the string representation: format is
  55 //      encodingid;facename[;charset]
  56
  57 bool wxNativeEncodingInfo::FromString(
  58   const wxString&                   rsStr
  59 )
  60 {
  61     wxStringTokenizer               vTokenizer(rsStr, _T(";"));
  62     wxString                        sEncid = vTokenizer.GetNextToken();
  63     long                            lEnc;
  64
  65     if (!sEncid.ToLong(&lEnc))
  66         return FALSE;
  67     encoding = (wxFontEncoding)lEnc;
  68     facename = vTokenizer.GetNextToken();
  69     if (!facename)
  70         return FALSE;
  71
  72     wxString                        sTmp = vTokenizer.GetNextToken();
  73
  74     if (!sTmp)
  75     {
  76         charset = 850;
  77     }
  78     else
  79     {
  80         if ( wxSscanf(sTmp, _T("%u"), &charset) != 1 )
  81         {
  82             // should be a number!
  83             return FALSE;
  84         }
  85     }
  86     return TRUE;
  87 } // end of wxNativeEncodingInfo::FromString
  88
  89 wxString wxNativeEncodingInfo::ToString() const
  90 {
  91     wxString                        sStr;
  92
  93     sStr << (long)encoding << _T(';') << facename;
  94
  95     if (charset != 850)
  96     {
  97         sStr << _T(';') << charset;
  98     }
  99     return sStr;
 100 } // end of wxNativeEncodingInfo::ToString
 101
 102 // ----------------------------------------------------------------------------
 103 // helper functions
 104 // ----------------------------------------------------------------------------
 105
 106 bool wxGetNativeFontEncoding(
 107   wxFontEncoding                    vEncoding
 108 , wxNativeEncodingInfo*             pInfo
 109 )
 110 {
 111     wxCHECK_MSG(pInfo, FALSE, _T("bad pointer in wxGetNativeFontEncoding") );
 112     if (vEncoding == wxFONTENCODING_DEFAULT)
 113     {
 114         vEncoding = wxFont::GetDefaultEncoding();
 115     }
 116     switch (vEncoding)
 117     {
 118         case wxFONTENCODING_ISO8859_1:
 119         case wxFONTENCODING_ISO8859_15:
 120         case wxFONTENCODING_CP1250:
 121             pInfo->charset = 1250;
 122             break;
 123
 124         case wxFONTENCODING_ISO8859_2:
 125         case wxFONTENCODING_CP1252:
 126             pInfo->charset = 1252;
 127             break;
 128
 129         case wxFONTENCODING_ISO8859_4:
 130         case wxFONTENCODING_ISO8859_10:
 131             pInfo->charset = 921; // what is baltic?
 132             break;
 133
 134         case wxFONTENCODING_ISO8859_5:
 135         case wxFONTENCODING_CP1251:
 136             pInfo->charset = 1251;
 137             break;
 138
 139         case wxFONTENCODING_ISO8859_6:
 140             pInfo->charset = 864;
 141             break;
 142
 143         case wxFONTENCODING_ISO8859_7:
 144             pInfo->charset = 869;
 145             break;
 146
 147         case wxFONTENCODING_ISO8859_8:
 148             pInfo->charset = 862;
 149             break;
 150
 151         case wxFONTENCODING_ISO8859_9:
 152             pInfo->charset = 857;
 153             break;
 154
 155         case wxFONTENCODING_ISO8859_11:
 156             pInfo->charset = 874; // what is thai
 157             break;
 158
 159         case wxFONTENCODING_CP437:
 160             pInfo->charset = 437;
 161             break;
 162
 163         default:
 164             wxFAIL_MSG(wxT("unsupported encoding"));
 165             // fall through
 166
 167         case wxFONTENCODING_SYSTEM:
 168             pInfo->charset = 850;
 169             break;
 170     }
 171     return TRUE;
 172 } // end of wxGetNativeFontEncoding
 173
 174 wxFontEncoding wxGetFontEncFromCharSet(
 175   int                               nCharSet
 176 )
 177 {
 178     wxFontEncoding                  eFontEncoding;
 179
 180     switch (nCharSet)
 181     {
 182         default:
 183         case 1250:
 184             eFontEncoding = wxFONTENCODING_CP1250;
 185             break;
 186
 187         case 1252:
 188             eFontEncoding = wxFONTENCODING_CP1252;
 189             break;
 190
 191         case 921:
 192             eFontEncoding = wxFONTENCODING_ISO8859_4;
 193             break;
 194
 195         case 1251:
 196             eFontEncoding = wxFONTENCODING_CP1251;
 197             break;
 198
 199         case 864:
 200             eFontEncoding = wxFONTENCODING_ISO8859_6;
 201             break;
 202
 203         case 869:
 204             eFontEncoding = wxFONTENCODING_ISO8859_7;
 205             break;
 206
 207         case 862:
 208             eFontEncoding = wxFONTENCODING_ISO8859_8;
 209             break;
 210
 211         case 857:
 212             eFontEncoding = wxFONTENCODING_ISO8859_9;
 213             break;
 214
 215         case 874:
 216             eFontEncoding = wxFONTENCODING_ISO8859_11;
 217             break;
 218
 219         case 437:
 220             eFontEncoding = wxFONTENCODING_CP437;
 221             break;
 222     }
 223     return eFontEncoding;
 224 } // end of wxGetNativeFontEncoding
 225
 226 bool wxTestFontEncoding(
 227   const wxNativeEncodingInfo&       rInfo
 228 )
 229 {
 230     FATTRS                          vLogFont;
 231     HPS                             hPS;
 232
 233     hPS = ::WinGetPS(HWND_DESKTOP);
 234
 235     memset(&vLogFont, '\0', sizeof(FATTRS));           // all default values
 236     vLogFont.usRecordLength = sizeof(FATTRS);
 237     vLogFont.usCodePage = rInfo.charset;
 238     vLogFont.lMaxBaselineExt = 0L;                    // Outline fonts should use 0
 239     vLogFont.lAveCharWidth = 0L;                      // Outline fonts should use 0
 240     vLogFont.fsFontUse = FATTR_FONTUSE_OUTLINE |      // only outline fonts allowed
 241                          FATTR_FONTUSE_TRANSFORMABLE; // may be transformed
 242
 243     strncpy(vLogFont.szFacename, rInfo.facename.c_str(), sizeof(vLogFont.szFacename));
 244
 245     if (!::GpiCreateLogFont( hPS
 246                             ,NULL
 247                             ,1L
 248                             ,&vLogFont
 249                            ))
 250     {
 251         ::WinReleasePS(hPS);
 252         return FALSE;
 253     }
 254     ::WinReleasePS(hPS);
 255     return TRUE;
 256 } // end of wxTestFontEncoding
 257
 258 // ----------------------------------------------------------------------------
 259 // wxFont <-> LOGFONT conversion
 260 // ----------------------------------------------------------------------------
 261
 262 void wxConvertVectorFontSize(
 263   FIXED                             fxPointSize
 264 , PFATTRS                           pFattrs
 265 )
 266 {
 267     HPS                             hPS;
 268     HDC                             hDC;
 269     LONG                            lXFontResolution;
 270     LONG                            lYFontResolution;
 271     SIZEF                           vSizef;
 272
 273     hPS = WinGetScreenPS(HWND_DESKTOP); // Screen presentation space
 274
 275     //
 276     //   Query device context for the screen and then query
 277     //   the resolution of the device for the device context.
 278     //
 279
 280     hDC = GpiQueryDevice(hPS);
 281     DevQueryCaps( hDC, CAPS_HORIZONTAL_FONT_RES, (LONG)1, &lXFontResolution);
 282     DevQueryCaps( hDC, CAPS_VERTICAL_FONT_RES, (LONG)1, &lYFontResolution);
 283
 284     //
 285     //   Calculate the size of the character box, based on the
 286     //   point size selected and the resolution of the device.
 287     //   The size parameters are of type FIXED, NOT int.
 288     //   NOTE: 1 point == 1/72 of an inch.
 289     //
 290
 291     vSizef.cx = (FIXED)(((fxPointSize) / 72 ) * lXFontResolution );
 292     vSizef.cy = (FIXED)(((fxPointSize) / 72 ) * lYFontResolution );
 293
 294     pFattrs->lMaxBaselineExt = MAKELONG( HIUSHORT( vSizef.cy ), 0 );
 295     pFattrs->lAveCharWidth   = MAKELONG( HIUSHORT( vSizef.cx ), 0 );
 296     WinReleasePS(hPS);
 297
 298 } // end of wxConvertVectorPointSize
 299
 300 void wxFillLogFont(
 301   LOGFONT*                          pFattrs  // OS2 GPI FATTRS
 302 , PFACENAMEDESC                     pFaceName
 303 , HPS*                              phPS
 304 , bool*                             pbInternalPS
 305 , long*                             pflId
 306 , wxString&                         sFaceName
 307 , wxFont*                           pFont
 308 )
 309 {
 310     LONG                            lNumFonts = 0L;       // For system font count
 311     ERRORID                         vError;               // For logging API errors
 312     LONG                            lTemp = 0L;
 313     bool                            bInternalPS = FALSE;  // if we have to create one
 314     PFONTMETRICS                    pFM = NULL;
 315
 316     //
 317     // Initial house cleaning to free data buffers and ensure we have a
 318     // functional PS to work with
 319     //
 320     if (!*phPS)
 321     {
 322         *phPS = ::WinGetPS(HWND_DESKTOP);
 323         bInternalPS = TRUE;
 324     }
 325
 326     //
 327     // Determine the number of fonts.
 328     //
 329     if((lNumFonts = ::GpiQueryFonts( *phPS
 330                                     ,QF_PUBLIC | QF_PRIVATE
 331                                     ,NULL
 332                                     ,&lTemp
 333                                     ,(LONG) sizeof(FONTMETRICS)
 334                                     ,NULL
 335                                    )) < 0L)
 336     {
 337         ERRORID                     vError;
 338         wxString                    sError;
 339
 340         vError = ::WinGetLastError(wxGetInstance());
 341         sError = wxPMErrorToStr(vError);
 342         return;
 343     }
 344
 345     //
 346     // Allocate space for the font metrics.
 347     //
 348     pFM = new FONTMETRICS[lNumFonts + 1];
 349
 350     //
 351     // Retrieve the font metrics.
 352     //
 353     lTemp = lNumFonts;
 354     lTemp = ::GpiQueryFonts( *phPS
 355                             ,QF_PUBLIC
 356                             ,NULL
 357                             ,&lTemp
 358                             ,(LONG) sizeof(FONTMETRICS)
 359                             ,pFM
 360                            );
 361     pFont->SetFM( pFM
 362                  ,(int)lNumFonts
 363                 );
 364
 365     //
 366     // Initialize FATTR and FACENAMEDESC
 367     //
 368     pFattrs->usRecordLength = sizeof(FATTRS);
 369     pFattrs->fsFontUse = FATTR_FONTUSE_OUTLINE;       // only outline fonts allowed
 370     pFattrs->fsType = 0;
 371     pFattrs->lMaxBaselineExt = pFattrs->lAveCharWidth = 0;
 372     pFattrs->idRegistry = 0;
 373     pFattrs->lMatch = 0;
 374
 375     pFaceName->usSize = sizeof(FACENAMEDESC);
 376     pFaceName->usWeightClass = FWEIGHT_DONT_CARE;
 377     pFaceName->usWidthClass = FWIDTH_DONT_CARE;
 378     pFaceName->usReserved = 0;
 379     pFaceName->flOptions = 0;
 380
 381     //
 382     // This does the actual selection of fonts
 383     //
 384     wxOS2SelectMatchingFontByName( pFattrs
 385                                   ,pFaceName
 386                                   ,pFM
 387                                   ,(int)lNumFonts
 388                                   ,pFont
 389                                  );
 390     //
 391     // We should now have the correct FATTRS set with the selected
 392     // font, so now we need to generate an ID
 393     //
 394     long                            lNumLids = ::GpiQueryNumberSetIds(*phPS);
 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                             nPointSize;
 468     int                             nIs;
 469     int                             nMinDiff0;
 470     int                             anDiff[16];
 471     int                             anMinDiff[16];
 472     int                             nIndex = 0;
 473     char                            zFontFaceName[FACESIZE];
 474     wxString                        sFaceName;
 475     USHORT                          usWeightClass;
 476     int                             fsSelection = 0;
 477
 478     nMinDiff0 = 0xf000;
 479     for(i = 0;i < 16; i++)
 480         anMinDiff[i] = nMinDiff0;
 481
 482     switch (pFont->GetFamily())
 483     {
 484         case wxSCRIPT:
 485             sFaceName = wxT("Tms Rmn");
 486             break;
 487
 488         case wxDECORATIVE:
 489             sFaceName = wxT("WarpSans");
 490             break;
 491
 492         case wxROMAN:
 493             sFaceName = wxT("Tms Rmn");
 494             break;
 495
 496         case wxTELETYPE:
 497             sFaceName = wxT("Courier") ;
 498             break;
 499
 500         case wxMODERN:
 501             sFaceName = wxT("System VIO") ;
 502             break;
 503
 504         case wxSWISS:
 505             sFaceName = wxT("Helv") ;
 506             break;
 507
 508         case wxDEFAULT:
 509         default:
 510             sFaceName = wxT("System VIO") ;
 511     }
 512
 513     switch (pFont->GetWeight())
 514     {
 515         default:
 516             wxFAIL_MSG(_T("unknown font weight"));
 517             // fall through
 518             usWeightClass = FWEIGHT_DONT_CARE;
 519             break;
 520
 521         case wxNORMAL:
 522             usWeightClass = FWEIGHT_NORMAL;
 523             break;
 524
 525         case wxLIGHT:
 526             usWeightClass = FWEIGHT_LIGHT;
 527             break;
 528
 529         case wxBOLD:
 530             usWeightClass = FWEIGHT_BOLD;
 531             break;
 532
 533          case wxFONTWEIGHT_MAX:
 534             usWeightClass = FWEIGHT_ULTRA_BOLD;
 535             break;
 536     }
 537     pFaceName->usWeightClass = usWeightClass;
 538
 539     switch (pFont->GetStyle())
 540     {
 541         case wxITALIC:
 542         case wxSLANT:
 543             fsSelection = FM_SEL_ITALIC;
 544             pFaceName->flOptions = FTYPE_ITALIC;
 545             break;
 546
 547         default:
 548             wxFAIL_MSG(wxT("unknown font slant"));
 549             // fall through
 550
 551         case wxNORMAL:
 552             fsSelection  = 0;
 553             break;
 554     }
 555
 556     wxStrncpy(zFontFaceName, sFaceName.c_str(), WXSIZEOF(zFontFaceName));
 557     nPointSize = pFont->GetPointSize();
 558
 559     //
 560     // Matching logic to find the right FM struct
 561     //
 562     nIndex = 0;
 563     for(i = 0, nIs = 0; i < nNumFonts; i++)
 564     {
 565         int                         nEmHeight = 0;
 566         int                         nXHeight = 0;
 567
 568         anDiff[0] = wxGpiStrcmp(pFM[i].szFacename, zFontFaceName);
 569         anDiff[1] = abs(pFM[i].lEmHeight - nPointSize);
 570         anDiff[2] = abs(pFM[i].usWeightClass -  usWeightClass);
 571         anDiff[3] = abs((pFM[i].fsSelection & 0x2f) -  fsSelection);
 572         if(anDiff[0] == 0)
 573         {
 574             nEmHeight = (int)pFM[i].lEmHeight;
 575             nXHeight  =(int)pFM[i].lXHeight;
 576             if( (nIs & 0x01) == 0)
 577             {
 578                 nIs = 1;
 579                 nIndex = i;
 580                 anMinDiff[1] = anDiff[1];
 581                 anMinDiff[2] = anDiff[2];
 582                 anMinDiff[3] = anDiff[3];
 583             }
 584             else if(anDiff[3] < anMinDiff[3])
 585             {
 586                 nIndex = i;
 587                 anMinDiff[3] = anDiff[3];
 588             }
 589             else if(anDiff[2] < anMinDiff[2])
 590             {
 591                 nIndex = i;
 592                 anMinDiff[2] = anDiff[2];
 593             }
 594             else if(anDiff[1] < anMinDiff[1])
 595             {
 596                 nIndex = i;
 597                 anMinDiff[1] = anDiff[1];
 598             }
 599             anMinDiff[0] = 0;
 600         }
 601         else if(anDiff[0] < anMinDiff[0])
 602         {
 603               nIs = 2;
 604               nIndex = i;
 605               anMinDiff[3] = anDiff[3];
 606               anMinDiff[2] = anDiff[2];
 607               anMinDiff[1] = anDiff[1];
 608               anMinDiff[0] = anDiff[0];
 609         }
 610         else if(anDiff[0] == anMinDiff[0])
 611         {
 612             if(anDiff[3] < anMinDiff[3])
 613             {
 614                 nIndex = i;
 615                 anMinDiff[3] = anDiff[3];
 616                 nIs = 2;
 617             }
 618             else if(anDiff[2] < anMinDiff[2])
 619             {
 620                 nIndex = i;
 621                 anMinDiff[2] = anDiff[2];
 622                 nIs = 2;
 623             }
 624             else if(anDiff[1] < anMinDiff[1])
 625             {
 626                 nIndex = i;
 627                 anMinDiff[1] = anDiff[1];
 628                 nIs = 2;
 629             }
 630         }
 631     }
 632
 633     //
 634     // Fill in the FATTRS with the best match from FONTMETRICS
 635     //
 636     pFattrs->usRecordLength  = sizeof(FATTRS);              // Sets size of structure
 637     pFattrs->lMatch          = pFM[nIndex].lMatch;          // Force match
 638     pFattrs->idRegistry      = 0;
 639     pFattrs->usCodePage      = 0;
 640     pFattrs->fsFontUse       = 0;
 641     pFattrs->fsType          = 0;
 642     pFattrs->lMaxBaselineExt = 0;
 643     pFattrs->lAveCharWidth   = 0;
 644     wxStrcpy(pFattrs->szFacename, pFM[nIndex].szFacename);
 645     if (pFont->GetWeight() == wxNORMAL)
 646         pFattrs->fsSelection = 0;
 647     else
 648         pFattrs->fsSelection = FATTR_SEL_BOLD;
 649
 650     if (pFont->GetStyle() == wxITALIC || pFont->GetStyle() == wxSLANT)
 651         pFattrs->fsSelection |= FATTR_SEL_ITALIC;
 652
 653     if (pFont->GetUnderlined())
 654         pFattrs->fsSelection |= FATTR_SEL_UNDERSCORE;
 655 } // end of wxOS2SelectMatchingFontByName
 656
 657 wxFont wxCreateFontFromLogFont(
 658   const LOGFONT*                    pLogFont
 659 , const PFONTMETRICS                pFM
 660 , PFACENAMEDESC                     pFaceName
 661 )
 662 {
 663     wxNativeFontInfo                vInfo;
 664
 665     vInfo.fa = *pLogFont;
 666     vInfo.fm = *pFM;
 667     vInfo.fn = *pFaceName;
 668     return wxFont(vInfo);
 669 } // end of wxCreateFontFromLogFont
 670
 671 int wxGpiStrcmp(
 672   char*                             s0
 673 , char*                             s1
 674 )
 675 {   int                             l0;
 676     int                             l1;
 677     int                             l;
 678     int                             d;
 679     int                             d1;
 680     int                             i;
 681     int                             rc;
 682
 683     rc = 0;
 684     if(s0 == NULL)
 685     {
 686         if(s1 == NULL)
 687             return 0;
 688         else
 689             return 32;
 690     }
 691     else if(s1 == NULL)
 692         return 32;
 693
 694     l0 = strlen(s0);
 695     l1 = strlen(s1);
 696     l  = l0;
 697     if(l0 != l1)
 698     {
 699         rc++;
 700         if(l1 < l0)
 701             l = l1;
 702     }
 703     for(i=0;i<l;i++)
 704     {
 705         d = s0[i]-s1[i];
 706         if(!d)
 707             continue;
 708         d1 = toupper(s0[i]) - toupper(s1[i]);
 709         if(!d1)
 710             continue;
 711         rc += abs(d);
 712     }
 713     return rc;
 714 }
 715