win32ss/gdi/ntgdi/text.c

   1 /*
   2  * PROJECT:         ReactOS win32 kernel mode subsystem
   3  * LICENSE:         GPL - See COPYING in the top level directory
   4  * FILE:            win32ss/gdi/ntgdi/text.c
   5  * PURPOSE:         Text/Font
   6  * PROGRAMMER:
   7  */
   8
   9 /** Includes ******************************************************************/
  10
  11 #include <win32k.h>
  12
  13 #define NDEBUG
  14 #include <debug.h>
  15
  16 /** Functions *****************************************************************/
  17
  18 BOOL FASTCALL
  19 GreTextOutW(
  20     HDC  hdc,
  21     int  nXStart,
  22     int  nYStart,
  23     LPCWSTR  lpString,
  24     int  cchString)
  25 {
  26     return GreExtTextOutW(hdc, nXStart, nYStart, 0, NULL, lpString, cchString, NULL, 0);
  27 }
  28
  29 /*
  30    flOpts :
  31    GetTextExtentPoint32W = 0
  32    GetTextExtentPointW   = 1
  33  */
  34 BOOL
  35 FASTCALL
  36 GreGetTextExtentW(
  37     HDC hDC,
  38     LPCWSTR lpwsz,
  39     INT cwc,
  40     LPSIZE psize,
  41     UINT flOpts)
  42 {
  43     PDC pdc;
  44     PDC_ATTR pdcattr;
  45     BOOL Result;
  46     PTEXTOBJ TextObj;
  47
  48     if (!cwc)
  49     {
  50         psize->cx = 0;
  51         psize->cy = 0;
  52         return TRUE;
  53     }
  54
  55     pdc = DC_LockDc(hDC);
  56     if (!pdc)
  57     {
  58         EngSetLastError(ERROR_INVALID_HANDLE);
  59         return FALSE;
  60     }
  61
  62     pdcattr = pdc->pdcattr;
  63
  64     TextObj = RealizeFontInit(pdcattr->hlfntNew);
  65     if ( TextObj )
  66     {
  67         Result = TextIntGetTextExtentPoint( pdc,
  68                                             TextObj,
  69                                             lpwsz,
  70                                             cwc,
  71                                             0,
  72                                             NULL,
  73                                             0,
  74                                             psize,
  75                                             flOpts);
  76         TEXTOBJ_UnlockText(TextObj);
  77     }
  78     else
  79         Result = FALSE;
  80
  81     DC_UnlockDc(pdc);
  82     return Result;
  83 }
  84
  85
  86 /*
  87    fl :
  88    GetTextExtentExPointW = 0 and everything else that uses this.
  89    GetTextExtentExPointI = 1
  90  */
  91 BOOL
  92 FASTCALL
  93 GreGetTextExtentExW(
  94     HDC hDC,
  95     LPCWSTR String,
  96     ULONG Count,
  97     ULONG MaxExtent,
  98     PULONG Fit,
  99     PULONG Dx,
 100     LPSIZE pSize,
 101     FLONG fl)
 102 {
 103     PDC pdc;
 104     PDC_ATTR pdcattr;
 105     BOOL Result;
 106     PTEXTOBJ TextObj;
 107
 108     if ( (!String && Count ) || !pSize )
 109     {
 110         EngSetLastError(ERROR_INVALID_PARAMETER);
 111         return FALSE;
 112     }
 113
 114     if ( !Count )
 115     {
 116         if ( Fit ) Fit = 0;
 117         return TRUE;
 118     }
 119
 120     pdc = DC_LockDc(hDC);
 121     if (NULL == pdc)
 122     {
 123         EngSetLastError(ERROR_INVALID_HANDLE);
 124         return FALSE;
 125     }
 126     pdcattr = pdc->pdcattr;
 127
 128     TextObj = RealizeFontInit(pdcattr->hlfntNew);
 129     if ( TextObj )
 130     {
 131         Result = TextIntGetTextExtentPoint( pdc,
 132                                             TextObj,
 133                                             String,
 134                                             Count,
 135                                             MaxExtent,
 136                                             (LPINT)Fit,
 137                                             (LPINT)Dx,
 138                                             pSize,
 139                                             fl);
 140         TEXTOBJ_UnlockText(TextObj);
 141     }
 142     else
 143         Result = FALSE;
 144
 145     DC_UnlockDc(pdc);
 146     return Result;
 147 }
 148
 149 BOOL
 150 WINAPI
 151 GreGetTextMetricsW(
 152     _In_  HDC hdc,
 153     _Out_ LPTEXTMETRICW lptm)
 154 {
 155    TMW_INTERNAL tmwi;
 156    if (!ftGdiGetTextMetricsW(hdc, &tmwi)) return FALSE;
 157    *lptm = tmwi.TextMetric;
 158    return TRUE;
 159 }
 160
 161 DWORD
 162 APIENTRY
 163 NtGdiGetCharSet(HDC hDC)
 164 {
 165     PDC Dc;
 166     PDC_ATTR pdcattr;
 167     DWORD cscp;
 168     // If here, update everything!
 169     Dc = DC_LockDc(hDC);
 170     if (!Dc)
 171     {
 172         EngSetLastError(ERROR_INVALID_HANDLE);
 173         return 0;
 174     }
 175     cscp = ftGdiGetTextCharsetInfo(Dc, NULL, 0);
 176     pdcattr = Dc->pdcattr;
 177     pdcattr->iCS_CP = cscp;
 178     pdcattr->ulDirty_ &= ~DIRTY_CHARSET;
 179     DC_UnlockDc( Dc );
 180     return cscp;
 181 }
 182
 183 BOOL
 184 APIENTRY
 185 NtGdiGetRasterizerCaps(
 186     OUT LPRASTERIZER_STATUS praststat,
 187     IN ULONG cjBytes)
 188 {
 189     NTSTATUS Status = STATUS_SUCCESS;
 190     RASTERIZER_STATUS rsSafe;
 191
 192     if (praststat && cjBytes)
 193     {
 194         if ( cjBytes >= sizeof(RASTERIZER_STATUS) ) cjBytes = sizeof(RASTERIZER_STATUS);
 195         if ( ftGdiGetRasterizerCaps(&rsSafe))
 196         {
 197             _SEH2_TRY
 198             {
 199                 ProbeForWrite( praststat,
 200                 sizeof(RASTERIZER_STATUS),
 201                 1);
 202                 RtlCopyMemory(praststat, &rsSafe, cjBytes );
 203             }
 204             _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
 205             {
 206                 Status = _SEH2_GetExceptionCode();
 207             }
 208             _SEH2_END;
 209
 210             if (!NT_SUCCESS(Status))
 211             {
 212                 SetLastNtError(Status);
 213                 return FALSE;
 214             }
 215
 216             return TRUE;
 217         }
 218     }
 219     return FALSE;
 220 }
 221
 222 INT
 223 APIENTRY
 224 NtGdiGetTextCharsetInfo(
 225     IN HDC hdc,
 226     OUT OPTIONAL LPFONTSIGNATURE lpSig,
 227     IN DWORD dwFlags)
 228 {
 229     PDC Dc;
 230     INT Ret;
 231     FONTSIGNATURE fsSafe;
 232     PFONTSIGNATURE pfsSafe = &fsSafe;
 233     NTSTATUS Status = STATUS_SUCCESS;
 234
 235     Dc = DC_LockDc(hdc);
 236     if (!Dc)
 237     {
 238         EngSetLastError(ERROR_INVALID_HANDLE);
 239         return DEFAULT_CHARSET;
 240     }
 241
 242     if (!lpSig) pfsSafe = NULL;
 243
 244     Ret = HIWORD(ftGdiGetTextCharsetInfo( Dc, pfsSafe, dwFlags));
 245
 246     if (lpSig)
 247     {
 248         if (Ret == DEFAULT_CHARSET)
 249             RtlZeroMemory(pfsSafe, sizeof(FONTSIGNATURE));
 250
 251         _SEH2_TRY
 252         {
 253             ProbeForWrite( lpSig,
 254             sizeof(FONTSIGNATURE),
 255             1);
 256             RtlCopyMemory(lpSig, pfsSafe, sizeof(FONTSIGNATURE));
 257         }
 258         _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
 259         {
 260             Status = _SEH2_GetExceptionCode();
 261         }
 262         _SEH2_END;
 263
 264         if (!NT_SUCCESS(Status))
 265         {
 266             SetLastNtError(Status);
 267             return DEFAULT_CHARSET;
 268         }
 269     }
 270     DC_UnlockDc(Dc);
 271     return Ret;
 272 }
 273
 274
 275 /*
 276    fl :
 277    GetTextExtentExPointW = 0 and everything else that uses this.
 278    GetTextExtentExPointI = 1
 279  */
 280 W32KAPI
 281 BOOL
 282 APIENTRY
 283 NtGdiGetTextExtentExW(
 284     IN HDC hDC,
 285     IN OPTIONAL LPWSTR UnsafeString,
 286     IN ULONG Count,
 287     IN ULONG MaxExtent,
 288     OUT OPTIONAL PULONG UnsafeFit,
 289     OUT OPTIONAL PULONG UnsafeDx,
 290     OUT LPSIZE UnsafeSize,
 291     IN FLONG fl
 292 )
 293 {
 294     PDC dc;
 295     PDC_ATTR pdcattr;
 296     LPWSTR String;
 297     SIZE Size;
 298     NTSTATUS Status;
 299     BOOLEAN Result;
 300     INT Fit;
 301     LPINT Dx;
 302     PTEXTOBJ TextObj;
 303
 304     if ((LONG)Count < 0)
 305     {
 306         EngSetLastError(ERROR_INVALID_PARAMETER);
 307         return FALSE;
 308     }
 309
 310     /* FIXME: Handle fl */
 311
 312     if (0 == Count)
 313     {
 314         Size.cx = 0;
 315         Size.cy = 0;
 316         Status = MmCopyToCaller(UnsafeSize, &Size, sizeof(SIZE));
 317         if (! NT_SUCCESS(Status))
 318         {
 319             SetLastNtError(Status);
 320             return FALSE;
 321         }
 322         return TRUE;
 323     }
 324
 325     String = ExAllocatePoolWithTag(PagedPool, Count * sizeof(WCHAR), GDITAG_TEXT);
 326     if (NULL == String)
 327     {
 328         EngSetLastError(ERROR_NOT_ENOUGH_MEMORY);
 329         return FALSE;
 330     }
 331
 332     if (NULL != UnsafeDx)
 333     {
 334         Dx = ExAllocatePoolWithTag(PagedPool, Count * sizeof(INT), GDITAG_TEXT);
 335         if (NULL == Dx)
 336         {
 337             ExFreePoolWithTag(String, GDITAG_TEXT);
 338             EngSetLastError(ERROR_NOT_ENOUGH_MEMORY);
 339             return FALSE;
 340         }
 341     }
 342     else
 343     {
 344         Dx = NULL;
 345     }
 346
 347     Status = MmCopyFromCaller(String, UnsafeString, Count * sizeof(WCHAR));
 348     if (! NT_SUCCESS(Status))
 349     {
 350         if (NULL != Dx)
 351         {
 352             ExFreePoolWithTag(Dx, GDITAG_TEXT);
 353         }
 354         ExFreePoolWithTag(String, GDITAG_TEXT);
 355         SetLastNtError(Status);
 356         return FALSE;
 357     }
 358
 359     dc = DC_LockDc(hDC);
 360     if (NULL == dc)
 361     {
 362         if (NULL != Dx)
 363         {
 364             ExFreePoolWithTag(Dx, GDITAG_TEXT);
 365         }
 366         ExFreePoolWithTag(String, GDITAG_TEXT);
 367         EngSetLastError(ERROR_INVALID_HANDLE);
 368         return FALSE;
 369     }
 370     pdcattr = dc->pdcattr;
 371     TextObj = RealizeFontInit(pdcattr->hlfntNew);
 372     if ( TextObj )
 373     {
 374         Result = TextIntGetTextExtentPoint( dc,
 375                                             TextObj,
 376                                             String,
 377                                             Count,
 378                                             MaxExtent,
 379                                             NULL == UnsafeFit ? NULL : &Fit,
 380                                             Dx,
 381                                             &Size,
 382                                             fl);
 383         TEXTOBJ_UnlockText(TextObj);
 384     }
 385     else
 386         Result = FALSE;
 387     DC_UnlockDc(dc);
 388
 389     ExFreePoolWithTag(String, GDITAG_TEXT);
 390     if (! Result)
 391     {
 392         if (NULL != Dx)
 393         {
 394             ExFreePoolWithTag(Dx, GDITAG_TEXT);
 395         }
 396         return FALSE;
 397     }
 398
 399     if (NULL != UnsafeFit)
 400     {
 401         Status = MmCopyToCaller(UnsafeFit, &Fit, sizeof(INT));
 402         if (! NT_SUCCESS(Status))
 403         {
 404             if (NULL != Dx)
 405             {
 406                 ExFreePoolWithTag(Dx, GDITAG_TEXT);
 407             }
 408             SetLastNtError(Status);
 409             return FALSE;
 410         }
 411     }
 412
 413     if (NULL != UnsafeDx)
 414     {
 415         Status = MmCopyToCaller(UnsafeDx, Dx, Count * sizeof(INT));
 416         if (! NT_SUCCESS(Status))
 417         {
 418             if (NULL != Dx)
 419             {
 420                 ExFreePoolWithTag(Dx, GDITAG_TEXT);
 421             }
 422             SetLastNtError(Status);
 423             return FALSE;
 424         }
 425     }
 426     if (NULL != Dx)
 427     {
 428         ExFreePoolWithTag(Dx, GDITAG_TEXT);
 429     }
 430
 431     Status = MmCopyToCaller(UnsafeSize, &Size, sizeof(SIZE));
 432     if (! NT_SUCCESS(Status))
 433     {
 434         SetLastNtError(Status);
 435         return FALSE;
 436     }
 437
 438     return TRUE;
 439 }
 440
 441
 442 /*
 443    flOpts :
 444    GetTextExtentPoint32W = 0
 445    GetTextExtentPointW   = 1
 446  */
 447 BOOL
 448 APIENTRY
 449 NtGdiGetTextExtent(HDC hdc,
 450                    LPWSTR lpwsz,
 451                    INT cwc,
 452                    LPSIZE psize,
 453                    UINT flOpts)
 454 {
 455     return NtGdiGetTextExtentExW(hdc, lpwsz, cwc, 0, NULL, NULL, psize, flOpts);
 456 }
 457
 458 BOOL
 459 APIENTRY
 460 NtGdiSetTextJustification(HDC  hDC,
 461                           int  BreakExtra,
 462                           int  BreakCount)
 463 {
 464     PDC pDc;
 465     PDC_ATTR pdcattr;
 466
 467     pDc = DC_LockDc(hDC);
 468     if (!pDc)
 469     {
 470         EngSetLastError(ERROR_INVALID_HANDLE);
 471         return FALSE;
 472     }
 473
 474     pdcattr = pDc->pdcattr;
 475
 476     pdcattr->lBreakExtra = BreakExtra;
 477     pdcattr->cBreak = BreakCount;
 478
 479     DC_UnlockDc(pDc);
 480     return TRUE;
 481 }
 482
 483
 484 W32KAPI
 485 INT
 486 APIENTRY
 487 NtGdiGetTextFaceW(
 488     IN HDC hDC,
 489     IN INT Count,
 490     OUT OPTIONAL LPWSTR FaceName,
 491     IN BOOL bAliasName
 492 )
 493 {
 494     PDC Dc;
 495     PDC_ATTR pdcattr;
 496     HFONT hFont;
 497     PTEXTOBJ TextObj;
 498     NTSTATUS Status;
 499     SIZE_T fLen;
 500     INT ret;
 501
 502     /* FIXME: Handle bAliasName */
 503
 504     Dc = DC_LockDc(hDC);
 505     if (Dc == NULL)
 506     {
 507         EngSetLastError(ERROR_INVALID_HANDLE);
 508         return FALSE;
 509     }
 510     pdcattr = Dc->pdcattr;
 511     hFont = pdcattr->hlfntNew;
 512     DC_UnlockDc(Dc);
 513
 514     TextObj = RealizeFontInit(hFont);
 515     ASSERT(TextObj != NULL);
 516     fLen = wcslen(TextObj->logfont.elfEnumLogfontEx.elfLogFont.lfFaceName) + 1;
 517
 518     if (FaceName != NULL)
 519     {
 520         Count = min(Count, fLen);
 521         Status = MmCopyToCaller(FaceName, TextObj->logfont.elfEnumLogfontEx.elfLogFont.lfFaceName, Count * sizeof(WCHAR));
 522         if (!NT_SUCCESS(Status))
 523         {
 524             TEXTOBJ_UnlockText(TextObj);
 525             SetLastNtError(Status);
 526             return 0;
 527         }
 528         /* Terminate if we copied only part of the font name */
 529         if (Count > 0 && Count < fLen)
 530         {
 531             FaceName[Count - 1] = '\0';
 532         }
 533         ret = Count;
 534     }
 535     else
 536     {
 537         ret = fLen;
 538     }
 539
 540     TEXTOBJ_UnlockText(TextObj);
 541     return ret;
 542 }
 543
 544 W32KAPI
 545 BOOL
 546 APIENTRY
 547 NtGdiGetTextMetricsW(
 548     IN HDC hDC,
 549     OUT TMW_INTERNAL * pUnsafeTmwi,
 550     IN ULONG cj)
 551 {
 552     TMW_INTERNAL Tmwi;
 553
 554     if ( cj <= sizeof(TMW_INTERNAL) )
 555     {
 556         if (ftGdiGetTextMetricsW(hDC, &Tmwi))
 557         {
 558             _SEH2_TRY
 559             {
 560                 ProbeForWrite(pUnsafeTmwi, cj, 1);
 561                 RtlCopyMemory(pUnsafeTmwi, &Tmwi, cj);
 562             }
 563             _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
 564             {
 565                 SetLastNtError(_SEH2_GetExceptionCode());
 566                 _SEH2_YIELD(return FALSE);
 567             }
 568             _SEH2_END
 569
 570             return TRUE;
 571         }
 572     }
 573     return FALSE;
 574 }
 575
 576 /* EOF */