reactos/subsys/win32k/objects/gdiobj.c

   1 /*
   2  *  ReactOS W32 Subsystem
   3  *  Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 ReactOS Team
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19 /*
  20  * GDIOBJ.C - GDI object manipulation routines
  21  *
  22  * $Id: gdiobj.c,v 1.47 2003/10/16 03:26:51 vizzini Exp $
  23  *
  24  */
  25
  26 #undef WIN32_LEAN_AND_MEAN
  27 #define WIN32_NO_STATUS
  28 #include <windows.h>
  29 #include <ddk/ntddk.h>
  30 #include <include/dce.h>
  31 #include <include/object.h>
  32 #include <win32k/gdiobj.h>
  33 #include <win32k/brush.h>
  34 #include <win32k/pen.h>
  35 #include <win32k/text.h>
  36 #include <win32k/dc.h>
  37 #include <win32k/bitmaps.h>
  38 #include <win32k/region.h>
  39 #include <win32k/cursoricon.h>
  40 #include <include/palette.h>
  41 #define NDEBUG
  42 #include <win32k/debug1.h>
  43
  44 /*! Size of the GDI handle table
  45  * http://www.windevnet.com/documents/s=7290/wdj9902b/9902b.htm
  46  * gdi handle table can hold 0x4000 handles
  47 */
  48 #define GDI_HANDLE_COUNT 0x4000
  49
  50 #define GDI_GLOBAL_PROCESS ((HANDLE) 0xffffffff)
  51
  52 #define GDI_HANDLE_INDEX_MASK (GDI_HANDLE_COUNT - 1)
  53 #define GDI_HANDLE_TYPE_MASK  0x007f0000
  54 #define GDI_HANDLE_STOCK_MASK 0x00800000
  55
  56 #define GDI_HANDLE_CREATE(i, t)    ((HANDLE)(((i) & GDI_HANDLE_INDEX_MASK) | ((t) & GDI_HANDLE_TYPE_MASK)))
  57 #define GDI_HANDLE_GET_INDEX(h)    (((DWORD)(h)) & GDI_HANDLE_INDEX_MASK)
  58 #define GDI_HANDLE_GET_TYPE(h)     (((DWORD)(h)) & GDI_HANDLE_TYPE_MASK)
  59 #define GDI_HANDLE_IS_TYPE(h, t)   ((t) == (((DWORD)(h)) & GDI_HANDLE_TYPE_MASK))
  60 #define GDI_HANDLE_IS_STOCKOBJ(h)  (0 != (((DWORD)(h)) & GDI_HANDLE_STOCK_MASK))
  61 #define GDI_HANDLE_SET_STOCKOBJ(h) ((h) = (HANDLE)(((DWORD)(h)) | GDI_HANDLE_STOCK_MASK))
  62
  63 #define GDI_TYPE_TO_MAGIC(t) ((WORD) ((t) >> 16))
  64 #define GDI_MAGIC_TO_TYPE(m) ((DWORD)(m) << 16)
  65
  66 #define GDI_VALID_OBJECT(h, obj, t, f) \
  67   (NULL != (obj) \
  68    && (GDI_MAGIC_TO_TYPE((obj)->Magic) == (t) || GDI_OBJECT_TYPE_DONTCARE == (t)) \
  69    && (GDI_HANDLE_GET_TYPE((h)) == GDI_MAGIC_TO_TYPE((obj)->Magic)) \
  70    && (((obj)->hProcessId == PsGetCurrentProcessId()) \
  71        || (GDI_GLOBAL_PROCESS == (obj)->hProcessId) \
  72        || ((f) & GDIOBJFLAG_IGNOREPID)))
  73
  74 typedef struct _GDI_HANDLE_TABLE
  75 {
  76   WORD  wTableSize;
  77   PGDIOBJHDR Handles[1];
  78 } GDI_HANDLE_TABLE, *PGDI_HANDLE_TABLE;
  79
  80 /*  GDI stock objects */
  81
  82 static LOGBRUSH WhiteBrush =
  83 { BS_SOLID, RGB(255,255,255), 0 };
  84
  85 static LOGBRUSH LtGrayBrush =
  86 /* FIXME : this should perhaps be BS_HATCHED, at least for 1 bitperpixel */
  87 { BS_SOLID, RGB(192,192,192), 0 };
  88
  89 static LOGBRUSH GrayBrush =
  90 /* FIXME : this should perhaps be BS_HATCHED, at least for 1 bitperpixel */
  91 { BS_SOLID, RGB(128,128,128), 0 };
  92
  93 static LOGBRUSH DkGrayBrush =
  94 /* This is BS_HATCHED, for 1 bitperpixel. This makes the spray work in pbrush */
  95 /* NB_HATCH_STYLES is an index into HatchBrushes */
  96 { BS_HATCHED, RGB(0,0,0), NB_HATCH_STYLES };
  97
  98 static LOGBRUSH BlackBrush =
  99 { BS_SOLID, RGB(0,0,0), 0 };
 100
 101 static LOGBRUSH NullBrush =
 102 { BS_NULL, 0, 0 };
 103
 104 static LOGPEN WhitePen =
 105 { PS_SOLID, { 0, 0 }, RGB(255,255,255) };
 106
 107 static LOGPEN BlackPen =
 108 { PS_SOLID, { 0, 0 }, RGB(0,0,0) };
 109
 110 static LOGPEN NullPen =
 111 { PS_NULL, { 0, 0 }, 0 };
 112
 113 static LOGFONTW OEMFixedFont =
 114 { 14, 0, 0, 0, FW_NORMAL, FALSE, FALSE, FALSE, OEM_CHARSET,
 115   0, 0, DEFAULT_QUALITY, FIXED_PITCH | FF_MODERN, L"" };
 116
 117 static LOGFONTW AnsiFixedFont =
 118 { 14, 0, 0, 0, FW_NORMAL, FALSE, FALSE, FALSE, ANSI_CHARSET,
 119   0, 0, DEFAULT_QUALITY, FIXED_PITCH | FF_MODERN, L"" };
 120
 121 /*static LOGFONTW AnsiVarFont =
 122  *{ 14, 0, 0, 0, FW_NORMAL, FALSE, FALSE, FALSE, ANSI_CHARSET,
 123  *  0, 0, DEFAULT_QUALITY, VARIABLE_PITCH | FF_SWISS, L"MS Sans Serif" }; */
 124
 125 static LOGFONTW SystemFont =
 126 { 14, 0, 0, 0, FW_NORMAL, FALSE, FALSE, FALSE, ANSI_CHARSET,
 127   0, 0, DEFAULT_QUALITY, VARIABLE_PITCH | FF_SWISS, L"System" };
 128
 129 static LOGFONTW DeviceDefaultFont =
 130 { 14, 0, 0, 0, FW_NORMAL, FALSE, FALSE, FALSE, ANSI_CHARSET,
 131   0, 0, DEFAULT_QUALITY, VARIABLE_PITCH | FF_SWISS, L"" };
 132
 133 static LOGFONTW SystemFixedFont =
 134 { 14, 0, 0, 0, FW_NORMAL, FALSE, FALSE, FALSE, ANSI_CHARSET,
 135   0, 0, DEFAULT_QUALITY, FIXED_PITCH | FF_MODERN, L"" };
 136
 137 /* FIXME: Is this correct? */
 138 static LOGFONTW DefaultGuiFont =
 139 { 14, 0, 0, 0, FW_NORMAL, FALSE, FALSE, FALSE, ANSI_CHARSET,
 140   0, 0, DEFAULT_QUALITY, VARIABLE_PITCH | FF_SWISS, L"MS Sans Serif" };
 141
 142 #define NB_STOCK_OBJECTS (DEFAULT_GUI_FONT + 1)
 143
 144 static HGDIOBJ *StockObjects[NB_STOCK_OBJECTS];
 145 static PGDI_HANDLE_TABLE  HandleTable = 0;
 146 static FAST_MUTEX  HandleTableMutex;
 147 static FAST_MUTEX  RefCountHandling;
 148
 149 /*!
 150  * Allocate GDI object table.
 151  * \param       Size - number of entries in the object table.
 152  * Notes:: Must be called at IRQL < DISPATCH_LEVEL.
 153 */
 154 static PGDI_HANDLE_TABLE FASTCALL
 155 GDIOBJ_iAllocHandleTable (WORD Size)
 156 {
 157   PGDI_HANDLE_TABLE  handleTable;
 158
 159   /* prevent APC delivery for the *FastMutexUnsafe calls */
 160   const KIRQL PrevIrql = KfRaiseIrql(APC_LEVEL);
 161   ExAcquireFastMutexUnsafe (&HandleTableMutex);
 162   handleTable = ExAllocatePool(PagedPool,
 163                                sizeof(GDI_HANDLE_TABLE) +
 164                                sizeof(PGDIOBJ) * Size);
 165   ASSERT( handleTable );
 166   memset (handleTable,
 167           0,
 168           sizeof(GDI_HANDLE_TABLE) + sizeof(PGDIOBJ) * Size);
 169   handleTable->wTableSize = Size;
 170   ExReleaseFastMutexUnsafe (&HandleTableMutex);
 171   KfLowerIrql(PrevIrql);
 172
 173   return handleTable;
 174 }
 175
 176 /*!
 177  * Returns the entry into the handle table by index.
 178 */
 179 static PGDIOBJHDR FASTCALL
 180 GDIOBJ_iGetObjectForIndex(WORD TableIndex)
 181 {
 182   if (0 == TableIndex || HandleTable->wTableSize < TableIndex)
 183     {
 184       DPRINT1("Invalid TableIndex %u\n", (unsigned) TableIndex);
 185       return NULL;
 186     }
 187
 188   return HandleTable->Handles[TableIndex];
 189 }
 190
 191 /*!
 192  * Finds next free entry in the GDI handle table.
 193  * \return      index into the table is successful, zero otherwise.
 194 */
 195 static WORD FASTCALL
 196 GDIOBJ_iGetNextOpenHandleIndex (void)
 197 {
 198   WORD tableIndex;
 199
 200   /* prevent APC delivery for the *FastMutexUnsafe calls */
 201   const KIRQL PrevIrql = KfRaiseIrql(APC_LEVEL);
 202   ExAcquireFastMutexUnsafe (&HandleTableMutex);
 203   for (tableIndex = 1; tableIndex < HandleTable->wTableSize; tableIndex++)
 204     {
 205       if (NULL == HandleTable->Handles[tableIndex])
 206         {
 207           HandleTable->Handles[tableIndex] = (PGDIOBJHDR) -1;
 208           break;
 209         }
 210     }
 211   ExReleaseFastMutexUnsafe (&HandleTableMutex);
 212   KfLowerIrql(PrevIrql);
 213
 214   return (tableIndex < HandleTable->wTableSize) ? tableIndex : 0;
 215 }
 216
 217 /*!
 218  * Allocate memory for GDI object and return handle to it.
 219  *
 220  * \param Size - size of the GDI object. This shouldn't to include the size of GDIOBJHDR.
 221  * The actual amount of allocated memory is sizeof(GDIOBJHDR)+Size
 222  * \param ObjectType - type of object \ref GDI object types
 223  * \param CleanupProcPtr - Routine to be called on destruction of object
 224  *
 225  * \return Handle of the allocated object.
 226  *
 227  * \note Use GDIOBJ_Lock() to obtain pointer to the new object.
 228 */
 229 HGDIOBJ FASTCALL
 230 GDIOBJ_AllocObj(WORD Size, DWORD ObjectType, GDICLEANUPPROC CleanupProc)
 231 {
 232   PGDIOBJHDR  newObject;
 233   WORD Index;
 234
 235   Index = GDIOBJ_iGetNextOpenHandleIndex ();
 236   if (0 == Index)
 237     {
 238       DPRINT1("Out of GDI handles\n");
 239       return NULL;
 240     }
 241
 242   DPRINT("GDIOBJ_AllocObj: handle: %d, size: %d, type: 0x%08x\n", Index, Size, ObjectType);
 243   newObject = ExAllocatePool(PagedPool, Size + sizeof (GDIOBJHDR));
 244   if (newObject == NULL)
 245   {
 246     DPRINT1("GDIOBJ_AllocObj: failed\n");
 247     return NULL;
 248   }
 249   RtlZeroMemory (newObject, Size + sizeof(GDIOBJHDR));
 250
 251   newObject->wTableIndex = Index;
 252
 253   newObject->dwCount = 0;
 254   newObject->hProcessId = PsGetCurrentProcessId ();
 255   newObject->CleanupProc = CleanupProc;
 256   newObject->Magic = GDI_TYPE_TO_MAGIC(ObjectType);
 257   newObject->lockfile = NULL;
 258   newObject->lockline = 0;
 259   HandleTable->Handles[Index] = newObject;
 260
 261   return GDI_HANDLE_CREATE(Index, ObjectType);
 262 }
 263
 264 /*!
 265  * Free memory allocated for the GDI object. For each object type this function calls the
 266  * appropriate cleanup routine.
 267  *
 268  * \param hObj       - handle of the object to be deleted.
 269  * \param ObjectType - one of the \ref GDI object types
 270  * or GDI_OBJECT_TYPE_DONTCARE.
 271  * \param Flag       - if set to GDIOBJFLAG_IGNOREPID then the routine doesn't check if the process that
 272  * tries to delete the object is the same one that created it.
 273  *
 274  * \return Returns TRUE if succesful.
 275  *
 276  * \note You should only use GDIOBJFLAG_IGNOREPID if you are cleaning up after the process that terminated.
 277  * \note This function deferres object deletion if it is still in use.
 278 */
 279 BOOL STDCALL
 280 GDIOBJ_FreeObj(HGDIOBJ hObj, DWORD ObjectType, DWORD Flag)
 281 {
 282   PGDIOBJHDR objectHeader;
 283   PGDIOBJ Obj;
 284   BOOL  bRet = TRUE;
 285
 286   objectHeader = GDIOBJ_iGetObjectForIndex(GDI_HANDLE_GET_INDEX(hObj));
 287   DPRINT("GDIOBJ_FreeObj: hObj: 0x%08x, object: %x\n", hObj, objectHeader);
 288
 289   if (! GDI_VALID_OBJECT(hObj, objectHeader, ObjectType, Flag)
 290       || GDI_GLOBAL_PROCESS == objectHeader->hProcessId)
 291
 292     {
 293       DPRINT1("Can't delete hObj:0x%08x, type:0x%08x, flag:%d\n", hObj, ObjectType, Flag);
 294       return FALSE;
 295     }
 296
 297   DPRINT("FreeObj: locks: %x\n", objectHeader->dwCount );
 298   if (!(Flag & GDIOBJFLAG_IGNORELOCK))
 299     {
 300       /* check that the reference count is zero. if not then set flag
 301        * and delete object when releaseobj is called */
 302       ExAcquireFastMutex(&RefCountHandling);
 303       if ((objectHeader->dwCount & ~0x80000000) > 0 )
 304         {
 305           DPRINT("GDIOBJ_FreeObj: delayed object deletion: count %d\n", objectHeader->dwCount);
 306           objectHeader->dwCount |= 0x80000000;
 307           ExReleaseFastMutex(&RefCountHandling);
 308           return TRUE;
 309         }
 310       ExReleaseFastMutex(&RefCountHandling);
 311     }
 312
 313   /* allow object to delete internal data */
 314   if (NULL != objectHeader->CleanupProc)
 315     {
 316       Obj = (PGDIOBJ)((PCHAR)objectHeader + sizeof(GDIOBJHDR));
 317       bRet = (*(objectHeader->CleanupProc))(Obj);
 318     }
 319
 320   ExFreePool(objectHeader);
 321   HandleTable->Handles[GDI_HANDLE_GET_INDEX(hObj)] = NULL;
 322
 323   return bRet;
 324 }
 325
 326 /*!
 327  * Lock multiple objects. Use this function when you need to lock multiple objects and some of them may be
 328  * duplicates. You should use this function to avoid trying to lock the same object twice!
 329  *
 330  * \param       pList   pointer to the list that contains handles to the objects. You should set hObj and ObjectType fields.
 331  * \param       nObj    number of objects to lock
 332  * \return      for each entry in pList this function sets pObj field to point to the object.
 333  *
 334  * \note this function uses an O(n^2) algoritm because we shouldn't need to call it with more than 3 or 4 objects.
 335 */
 336 BOOL FASTCALL
 337 GDIOBJ_LockMultipleObj(PGDIMULTILOCK pList, INT nObj)
 338 {
 339   INT i, j;
 340   ASSERT( pList );
 341   /* FIXME - check for "invalid" handles */
 342   /* go through the list checking for duplicate objects */
 343   for (i = 0; i < nObj; i++)
 344     {
 345       pList[i].pObj = NULL;
 346       for (j = 0; j < i; j++)
 347         {
 348           if (pList[i].hObj == pList[j].hObj)
 349             {
 350               /* already locked, so just copy the pointer to the object */
 351               pList[i].pObj = pList[j].pObj;
 352               break;
 353             }
 354         }
 355
 356       if (NULL == pList[i].pObj)
 357         {
 358           /* object hasn't been locked, so lock it. */
 359           if (NULL != pList[i].hObj)
 360             {
 361               pList[i].pObj = GDIOBJ_LockObj(pList[i].hObj, pList[i].ObjectType);
 362             }
 363         }
 364     }
 365
 366   return TRUE;
 367 }
 368
 369 /*!
 370  * Unlock multiple objects. Use this function when you need to unlock multiple objects and some of them may be
 371  * duplicates.
 372  *
 373  * \param       pList   pointer to the list that contains handles to the objects. You should set hObj and ObjectType fields.
 374  * \param       nObj    number of objects to lock
 375  *
 376  * \note this function uses O(n^2) algoritm because we shouldn't need to call it with more than 3 or 4 objects.
 377 */
 378 BOOL FASTCALL
 379 GDIOBJ_UnlockMultipleObj(PGDIMULTILOCK pList, INT nObj)
 380 {
 381   INT i, j;
 382   ASSERT(pList);
 383
 384   /* go through the list checking for duplicate objects */
 385   for (i = 0; i < nObj; i++)
 386     {
 387       if (NULL != pList[i].pObj)
 388         {
 389           for (j = i + 1; j < nObj; j++)
 390             {
 391               if ((pList[i].pObj == pList[j].pObj))
 392                 {
 393                   /* set the pointer to zero for all duplicates */
 394                   pList[j].pObj = NULL;
 395                 }
 396             }
 397           GDIOBJ_UnlockObj(pList[i].hObj, pList[i].ObjectType);
 398           pList[i].pObj = NULL;
 399         }
 400     }
 401
 402   return TRUE;
 403 }
 404
 405 /*!
 406  * Marks the object as global. (Creator process ID is set to GDI_GLOBAL_PROCESS). Global objects may be
 407  * accessed by any process.
 408  * \param       ObjectHandle - handle of the object to make global.
 409  *
 410  * \note        Only stock objects should be marked global.
 411 */
 412 VOID FASTCALL
 413 GDIOBJ_MarkObjectGlobal(HGDIOBJ ObjectHandle)
 414 {
 415   PGDIOBJHDR ObjHdr;
 416
 417   DPRINT("GDIOBJ_MarkObjectGlobal handle 0x%08x\n", ObjectHandle);
 418   ObjHdr = GDIOBJ_iGetObjectForIndex(GDI_HANDLE_GET_INDEX(ObjectHandle));
 419   if (NULL == ObjHdr)
 420     {
 421       return;
 422     }
 423
 424   ObjHdr->hProcessId = GDI_GLOBAL_PROCESS;
 425 }
 426
 427 /*!
 428  * Removes the global mark from the object. Global objects may be
 429  * accessed by any process.
 430  * \param       ObjectHandle - handle of the object to make local.
 431  *
 432  * \note        Only stock objects should be marked global.
 433 */
 434 VOID FASTCALL
 435 GDIOBJ_UnmarkObjectGlobal(HGDIOBJ ObjectHandle)
 436 {
 437   PGDIOBJHDR ObjHdr;
 438
 439   DPRINT("GDIOBJ_MarkObjectGlobal handle 0x%08x\n", ObjectHandle);
 440   ObjHdr = GDIOBJ_iGetObjectForIndex(GDI_HANDLE_GET_INDEX(ObjectHandle));
 441   if (NULL == ObjHdr || GDI_GLOBAL_PROCESS != ObjHdr->hProcessId)
 442     {
 443       return;
 444     }
 445
 446   ObjHdr->hProcessId = PsGetCurrentProcessId();
 447 }
 448
 449 /*!
 450  * Get the type of the object.
 451  * \param       ObjectHandle - handle of the object.
 452  * \return      One of the \ref GDI object types
 453 */
 454 DWORD FASTCALL
 455 GDIOBJ_GetObjectType(HGDIOBJ ObjectHandle)
 456 {
 457   PGDIOBJHDR ObjHdr;
 458
 459   ObjHdr = GDIOBJ_iGetObjectForIndex(GDI_HANDLE_GET_INDEX(ObjectHandle));
 460   if (NULL == ObjHdr
 461       || ! GDI_VALID_OBJECT(ObjectHandle, ObjHdr, GDI_MAGIC_TO_TYPE(ObjHdr->Magic), 0))
 462     {
 463       DPRINT1("Invalid ObjectHandle 0x%08x\n", ObjectHandle);
 464       return 0;
 465     }
 466   DPRINT("GDIOBJ_GetObjectType for handle 0x%08x returns 0x%08x\n", ObjectHandle,
 467          GDI_MAGIC_TO_TYPE(ObjHdr->Magic));
 468
 469   return GDI_MAGIC_TO_TYPE(ObjHdr->Magic);
 470 }
 471
 472 /*!
 473  * Initialization of the GDI object engine.
 474 */
 475 VOID FASTCALL
 476 InitGdiObjectHandleTable (VOID)
 477 {
 478   DPRINT("InitGdiObjectHandleTable\n");
 479   ExInitializeFastMutex (&HandleTableMutex);
 480   ExInitializeFastMutex (&RefCountHandling);
 481
 482   HandleTable = GDIOBJ_iAllocHandleTable (GDI_HANDLE_COUNT);
 483   DPRINT("HandleTable: %x\n", HandleTable );
 484
 485   InitEngHandleTable();
 486 }
 487
 488 /*!
 489  * Creates a bunch of stock objects: brushes, pens, fonts.
 490 */
 491 VOID FASTCALL
 492 CreateStockObjects(void)
 493 {
 494   unsigned Object;
 495
 496   DPRINT("Beginning creation of stock objects\n");
 497
 498   /* Create GDI Stock Objects from the logical structures we've defined */
 499
 500   StockObjects[WHITE_BRUSH] =  NtGdiCreateBrushIndirect(&WhiteBrush);
 501   StockObjects[LTGRAY_BRUSH] = NtGdiCreateBrushIndirect(&LtGrayBrush);
 502   StockObjects[GRAY_BRUSH] =   NtGdiCreateBrushIndirect(&GrayBrush);
 503   StockObjects[DKGRAY_BRUSH] = NtGdiCreateBrushIndirect(&DkGrayBrush);
 504   StockObjects[BLACK_BRUSH] =  NtGdiCreateBrushIndirect(&BlackBrush);
 505   StockObjects[NULL_BRUSH] =   NtGdiCreateBrushIndirect(&NullBrush);
 506
 507   StockObjects[WHITE_PEN] = NtGdiCreatePenIndirect(&WhitePen);
 508   StockObjects[BLACK_PEN] = NtGdiCreatePenIndirect(&BlackPen);
 509   StockObjects[NULL_PEN] =  NtGdiCreatePenIndirect(&NullPen);
 510
 511   (void) TextIntCreateFontIndirect(&OEMFixedFont, (HFONT*)&StockObjects[OEM_FIXED_FONT]);
 512   (void) TextIntCreateFontIndirect(&AnsiFixedFont, (HFONT*)&StockObjects[ANSI_FIXED_FONT]);
 513   (void) TextIntCreateFontIndirect(&SystemFont, (HFONT*)&StockObjects[SYSTEM_FONT]);
 514   (void) TextIntCreateFontIndirect(&DeviceDefaultFont, (HFONT*)&StockObjects[DEVICE_DEFAULT_FONT]);
 515   (void) TextIntCreateFontIndirect(&SystemFixedFont, (HFONT*)&StockObjects[SYSTEM_FIXED_FONT]);
 516   (void) TextIntCreateFontIndirect(&DefaultGuiFont, (HFONT*)&StockObjects[DEFAULT_GUI_FONT]);
 517
 518   StockObjects[DEFAULT_PALETTE] = (HGDIOBJ*)PALETTE_Init();
 519
 520   for (Object = 0; Object < NB_STOCK_OBJECTS; Object++)
 521     {
 522       if (NULL != StockObjects[Object])
 523         {
 524           GDIOBJ_MarkObjectGlobal(StockObjects[Object]);
 525 /*        GDI_HANDLE_SET_STOCKOBJ(StockObjects[Object]);*/
 526         }
 527     }
 528
 529   DPRINT("Completed creation of stock objects\n");
 530 }
 531
 532 /*!
 533  * Return stock object.
 534  * \param       Object - stock object id.
 535  * \return      Handle to the object.
 536 */
 537 HGDIOBJ STDCALL
 538 NtGdiGetStockObject(INT Object)
 539 {
 540   DPRINT("NtGdiGetStockObject index %d\n", Object);
 541
 542   return ((Object < 0) || (NB_STOCK_OBJECTS <= Object)) ? NULL : StockObjects[Object];
 543 }
 544
 545 /*!
 546  * Delete GDI object
 547  * \param       hObject object handle
 548  * \return      if the function fails the returned value is FALSE.
 549 */
 550 BOOL STDCALL
 551 NtGdiDeleteObject(HGDIOBJ hObject)
 552 {
 553   DPRINT("NtGdiDeleteObject handle 0x%08x\n", hObject);
 554
 555   return GDIOBJ_FreeObj(hObject, GDI_OBJECT_TYPE_DONTCARE, GDIOBJFLAG_DEFAULT);
 556 }
 557
 558 /*!
 559  * Internal function. Called when the process is destroyed to free the remaining GDI handles.
 560  * \param       Process - PID of the process that will be destroyed.
 561 */
 562 BOOL FASTCALL
 563 CleanupForProcess (struct _EPROCESS *Process, INT Pid)
 564 {
 565   DWORD i;
 566   PGDIOBJHDR objectHeader;
 567   PEPROCESS CurrentProcess;
 568
 569   DPRINT("Starting CleanupForProcess prochandle %x Pid %d\n", Process, Pid);
 570   CurrentProcess = PsGetCurrentProcess();
 571   if (CurrentProcess != Process)
 572     {
 573       KeAttachProcess(Process);
 574     }
 575
 576   for(i = 1; i < HandleTable->wTableSize; i++)
 577     {
 578       objectHeader = GDIOBJ_iGetObjectForIndex(i);
 579       if (NULL != objectHeader &&
 580           (INT) objectHeader->hProcessId == Pid)
 581         {
 582           DPRINT("CleanupForProcess: %d, process: %d, locks: %d, magic: 0x%x", i, objectHeader->hProcessId, objectHeader->dwCount, objectHeader->Magic);
 583           GDIOBJ_FreeObj(GDI_HANDLE_CREATE(i, GDI_MAGIC_TO_TYPE(objectHeader->Magic)),
 584                          GDI_MAGIC_TO_TYPE(objectHeader->Magic),
 585                          GDIOBJFLAG_IGNOREPID | GDIOBJFLAG_IGNORELOCK);
 586         }
 587     }
 588
 589   if (CurrentProcess != Process)
 590     {
 591       KeDetachProcess();
 592     }
 593
 594   DPRINT("Completed cleanup for process %d\n", Pid);
 595
 596   return TRUE;
 597 }
 598
 599 #define GDIOBJ_TRACKLOCKS
 600
 601 #ifdef GDIOBJ_LockObj
 602 #undef GDIOBJ_LockObj
 603 PGDIOBJ FASTCALL
 604 GDIOBJ_LockObjDbg (const char* file, int line, HGDIOBJ hObj, DWORD ObjectType)
 605 {
 606   PGDIOBJ rc;
 607   PGDIOBJHDR ObjHdr = GDIOBJ_iGetObjectForIndex(GDI_HANDLE_GET_INDEX(hObj));
 608
 609   if (! GDI_VALID_OBJECT(hObj, ObjHdr, ObjectType, GDIOBJFLAG_DEFAULT))
 610     {
 611       int reason = 0;
 612       if (NULL == ObjHdr)
 613         {
 614           reason = 1;
 615         }
 616       else if (GDI_MAGIC_TO_TYPE(ObjHdr->Magic) != ObjectType && ObjectType != GDI_OBJECT_TYPE_DONTCARE)
 617         {
 618           reason = 2;
 619         }
 620       else if (ObjHdr->hProcessId != GDI_GLOBAL_PROCESS
 621            && ObjHdr->hProcessId != PsGetCurrentProcessId())
 622         {
 623           reason = 3;
 624         }
 625       else if (GDI_HANDLE_GET_TYPE(hObj) != ObjectType && ObjectType != GDI_OBJECT_TYPE_DONTCARE)
 626         {
 627           reason = 4;
 628         }
 629       DPRINT1("GDIOBJ_LockObj failed for 0x%08x, reqtype 0x%08x reason %d\n",
 630               hObj, ObjectType, reason );
 631       DPRINT1("\tcalled from: %s:%i\n", file, line );
 632       return NULL;
 633     }
 634   if (NULL != ObjHdr->lockfile)
 635     {
 636       DPRINT1("Caution! GDIOBJ_LockObj trying to lock object (0x%x) second time\n", hObj );
 637       DPRINT1("\tcalled from: %s:%i\n", file, line );
 638       DPRINT1("\tpreviously locked from: %s:%i\n", ObjHdr->lockfile, ObjHdr->lockline );
 639     }
 640   DPRINT("(%s:%i) GDIOBJ_LockObj(0x%08x,0x%08x)\n", file, line, hObj, ObjectType);
 641   rc = GDIOBJ_LockObj(hObj, ObjectType);
 642   if (rc && NULL == ObjHdr->lockfile)
 643     {
 644       ObjHdr->lockfile = file;
 645       ObjHdr->lockline = line;
 646     }
 647
 648   return rc;
 649 }
 650 #endif//GDIOBJ_LockObj
 651
 652 #ifdef GDIOBJ_UnlockObj
 653 #undef GDIOBJ_UnlockObj
 654 BOOL FASTCALL
 655 GDIOBJ_UnlockObjDbg (const char* file, int line, HGDIOBJ hObj, DWORD ObjectType)
 656 {
 657   PGDIOBJHDR ObjHdr = GDIOBJ_iGetObjectForIndex(GDI_HANDLE_GET_INDEX(hObj));
 658
 659   if (! GDI_VALID_OBJECT(hObj, ObjHdr, ObjectType, GDIOBJFLAG_DEFAULT))
 660     {
 661       DPRINT1("GDIBOJ_UnlockObj failed for 0x%08x, reqtype 0x%08x\n",
 662                   hObj, ObjectType);
 663       DPRINT1("\tcalled from: %s:%i\n", file, line);
 664       return FALSE;
 665     }
 666   DPRINT("(%s:%i) GDIOBJ_UnlockObj(0x%08x,0x%08x)\n", file, line, hObj, ObjectType);
 667   ObjHdr->lockfile = NULL;
 668   ObjHdr->lockline = 0;
 669
 670   return GDIOBJ_UnlockObj(hObj, ObjectType);
 671 }
 672 #endif//GDIOBJ_LockObj
 673
 674 /*!
 675  * Return pointer to the object by handle.
 676  *
 677  * \param hObj          Object handle
 678  * \param ObjectType    one of the object types defined in \ref GDI object types
 679  * \return              Pointer to the object.
 680  *
 681  * \note Process can only get pointer to the objects it created or global objects.
 682  *
 683  * \todo Don't allow to lock the objects twice! Synchronization!
 684 */
 685 PGDIOBJ FASTCALL
 686 GDIOBJ_LockObj(HGDIOBJ hObj, DWORD ObjectType)
 687 {
 688   PGDIOBJHDR ObjHdr = GDIOBJ_iGetObjectForIndex(GDI_HANDLE_GET_INDEX(hObj));
 689
 690   DPRINT("GDIOBJ_LockObj: hObj: 0x%08x, type: 0x%08x, objhdr: %x\n", hObj, ObjectType, ObjHdr);
 691   if (! GDI_VALID_OBJECT(hObj, ObjHdr, ObjectType, GDIOBJFLAG_DEFAULT))
 692     {
 693       DPRINT1("GDIBOJ_LockObj failed for 0x%08x, type 0x%08x\n",
 694                   hObj, ObjectType);
 695       return NULL;
 696     }
 697
 698   if(0 < ObjHdr->dwCount)
 699     {
 700       DPRINT1("Caution! GDIOBJ_LockObj trying to lock object (0x%x) second time\n", hObj);
 701       DPRINT1("\t called from: %x\n", __builtin_return_address(0));
 702     }
 703
 704   ExAcquireFastMutex(&RefCountHandling);
 705   ObjHdr->dwCount++;
 706   ExReleaseFastMutex(&RefCountHandling);
 707   return (PGDIOBJ)((PCHAR)ObjHdr + sizeof(GDIOBJHDR));
 708 }
 709
 710 /*!
 711  * Release GDI object. Every object locked by GDIOBJ_LockObj() must be unlocked. You should unlock the object
 712  * as soon as you don't need to have access to it's data.
 713
 714  * \param hObj          Object handle
 715  * \param ObjectType    one of the object types defined in \ref GDI object types
 716  *
 717  * \note This function performs delayed cleanup. If the object is locked when GDI_FreeObj() is called
 718  * then \em this function frees the object when reference count is zero.
 719  *
 720  * \todo Change synchronization algorithm.
 721 */
 722 #undef GDIOBJ_UnlockObj
 723 BOOL FASTCALL
 724 GDIOBJ_UnlockObj(HGDIOBJ hObj, DWORD ObjectType)
 725 {
 726   PGDIOBJHDR ObjHdr = GDIOBJ_iGetObjectForIndex(GDI_HANDLE_GET_INDEX(hObj));
 727
 728   DPRINT("GDIOBJ_UnlockObj: hObj: 0x%08x, type: 0x%08x, objhdr: %x\n", hObj, ObjectType, ObjHdr);
 729   if (! GDI_VALID_OBJECT(hObj, ObjHdr, ObjectType, GDIOBJFLAG_DEFAULT))
 730     {
 731     DPRINT1( "GDIOBJ_UnLockObj: failed\n");
 732     return FALSE;
 733   }
 734
 735   ExAcquireFastMutex(&RefCountHandling);
 736   if (0 == (ObjHdr->dwCount & ~0x80000000))
 737     {
 738       ExReleaseFastMutex(&RefCountHandling);
 739       DPRINT1( "GDIOBJ_UnLockObj: unlock object (0x%x) that is not locked\n", hObj );
 740       return FALSE;
 741     }
 742
 743   ObjHdr->dwCount--;
 744
 745   if (ObjHdr->dwCount == 0x80000000)
 746     {
 747       //delayed object release
 748       ObjHdr->dwCount = 0;
 749       ExReleaseFastMutex(&RefCountHandling);
 750       DPRINT("GDIOBJ_UnlockObj: delayed delete\n");
 751       return GDIOBJ_FreeObj(hObj, ObjectType, GDIOBJFLAG_DEFAULT);
 752     }
 753   ExReleaseFastMutex(&RefCountHandling);
 754
 755   return TRUE;
 756 }
 757
 758 /* EOF */