dlls/gdi32/dc.c

   1 /*
   2  * GDI Device Context functions
   3  *
   4  * Copyright 1993 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "config.h"
  22
  23 #include <assert.h>
  24 #include <stdarg.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include "windef.h"
  28 #include "winbase.h"
  29 #include "wingdi.h"
  30 #include "winreg.h"
  31 #include "winternl.h"
  32 #include "winerror.h"
  33 #include "gdi_private.h"
  34 #include "wine/unicode.h"
  35 #include "wine/debug.h"
  36
  37 WINE_DEFAULT_DEBUG_CHANNEL(dc);
  38
  39 static const WCHAR displayW[] = { 'd','i','s','p','l','a','y',0 };
  40
  41 static BOOL DC_DeleteObject( HGDIOBJ handle );
  42
  43 static const struct gdi_obj_funcs dc_funcs =
  44 {
  45     NULL,             /* pSelectObject */
  46     NULL,             /* pGetObjectA */
  47     NULL,             /* pGetObjectW */
  48     NULL,             /* pUnrealizeObject */
  49     DC_DeleteObject   /* pDeleteObject */
  50 };
  51
  52
  53 static inline DC *get_dc_obj( HDC hdc )
  54 {
  55     DC *dc = GDI_GetObjPtr( hdc, 0 );
  56     if (!dc) return NULL;
  57
  58     if ((dc->header.type != OBJ_DC) &&
  59         (dc->header.type != OBJ_MEMDC) &&
  60         (dc->header.type != OBJ_METADC) &&
  61         (dc->header.type != OBJ_ENHMETADC))
  62     {
  63         GDI_ReleaseObj( hdc );
  64         SetLastError( ERROR_INVALID_HANDLE );
  65         dc = NULL;
  66     }
  67     return dc;
  68 }
  69
  70
  71 /***********************************************************************
  72  *           alloc_dc_ptr
  73  */
  74 DC *alloc_dc_ptr( WORD magic )
  75 {
  76     DC *dc;
  77
  78     if (!(dc = HeapAlloc( GetProcessHeap(), 0, sizeof(*dc) ))) return NULL;
  79
  80     dc->nulldrv.funcs       = &null_driver;
  81     dc->nulldrv.next        = NULL;
  82     dc->physDev             = &dc->nulldrv;
  83     dc->thread              = GetCurrentThreadId();
  84     dc->refcount            = 1;
  85     dc->dirty               = 0;
  86     dc->saveLevel           = 0;
  87     dc->saved_dc            = 0;
  88     dc->dwHookData          = 0;
  89     dc->hookProc            = NULL;
  90     dc->wndOrgX             = 0;
  91     dc->wndOrgY             = 0;
  92     dc->wndExtX             = 1;
  93     dc->wndExtY             = 1;
  94     dc->vportOrgX           = 0;
  95     dc->vportOrgY           = 0;
  96     dc->vportExtX           = 1;
  97     dc->vportExtY           = 1;
  98     dc->miterLimit          = 10.0f; /* 10.0 is the default, from MSDN */
  99     dc->flags               = 0;
 100     dc->layout              = 0;
 101     dc->hClipRgn            = 0;
 102     dc->hMetaRgn            = 0;
 103     dc->hMetaClipRgn        = 0;
 104     dc->hVisRgn             = 0;
 105     dc->hPen                = GDI_inc_ref_count( GetStockObject( BLACK_PEN ));
 106     dc->hBrush              = GDI_inc_ref_count( GetStockObject( WHITE_BRUSH ));
 107     dc->hFont               = GDI_inc_ref_count( GetStockObject( SYSTEM_FONT ));
 108     dc->hBitmap             = 0;
 109     dc->hDevice             = 0;
 110     dc->hPalette            = GetStockObject( DEFAULT_PALETTE );
 111     dc->gdiFont             = 0;
 112     dc->font_code_page      = CP_ACP;
 113     dc->ROPmode             = R2_COPYPEN;
 114     dc->polyFillMode        = ALTERNATE;
 115     dc->stretchBltMode      = BLACKONWHITE;
 116     dc->relAbsMode          = ABSOLUTE;
 117     dc->backgroundMode      = OPAQUE;
 118     dc->backgroundColor     = RGB( 255, 255, 255 );
 119     dc->dcBrushColor        = RGB( 255, 255, 255 );
 120     dc->dcPenColor          = RGB( 0, 0, 0 );
 121     dc->textColor           = RGB( 0, 0, 0 );
 122     dc->brushOrgX           = 0;
 123     dc->brushOrgY           = 0;
 124     dc->mapperFlags         = 0;
 125     dc->textAlign           = TA_LEFT | TA_TOP | TA_NOUPDATECP;
 126     dc->charExtra           = 0;
 127     dc->breakExtra          = 0;
 128     dc->breakRem            = 0;
 129     dc->MapMode             = MM_TEXT;
 130     dc->GraphicsMode        = GM_COMPATIBLE;
 131     dc->pAbortProc          = NULL;
 132     dc->CursPosX            = 0;
 133     dc->CursPosY            = 0;
 134     dc->ArcDirection        = AD_COUNTERCLOCKWISE;
 135     dc->xformWorld2Wnd.eM11 = 1.0f;
 136     dc->xformWorld2Wnd.eM12 = 0.0f;
 137     dc->xformWorld2Wnd.eM21 = 0.0f;
 138     dc->xformWorld2Wnd.eM22 = 1.0f;
 139     dc->xformWorld2Wnd.eDx  = 0.0f;
 140     dc->xformWorld2Wnd.eDy  = 0.0f;
 141     dc->xformWorld2Vport    = dc->xformWorld2Wnd;
 142     dc->xformVport2World    = dc->xformWorld2Wnd;
 143     dc->vport2WorldValid    = TRUE;
 144     dc->BoundsRect.left     = 0;
 145     dc->BoundsRect.top      = 0;
 146     dc->BoundsRect.right    = 0;
 147     dc->BoundsRect.bottom   = 0;
 148     PATH_InitGdiPath(&dc->path);
 149
 150     if (!(dc->hSelf = alloc_gdi_handle( &dc->header, magic, &dc_funcs )))
 151     {
 152         HeapFree( GetProcessHeap(), 0, dc );
 153         return NULL;
 154     }
 155     dc->nulldrv.hdc = dc->hSelf;
 156     return dc;
 157 }
 158
 159
 160
 161 /***********************************************************************
 162  *           free_dc_state
 163  */
 164 static void free_dc_state( DC *dc )
 165 {
 166     if (dc->hClipRgn) DeleteObject( dc->hClipRgn );
 167     if (dc->hMetaRgn) DeleteObject( dc->hMetaRgn );
 168     if (dc->hMetaClipRgn) DeleteObject( dc->hMetaClipRgn );
 169     if (dc->hVisRgn) DeleteObject( dc->hVisRgn );
 170     PATH_DestroyGdiPath( &dc->path );
 171     HeapFree( GetProcessHeap(), 0, dc );
 172 }
 173
 174
 175 /***********************************************************************
 176  *           free_dc_ptr
 177  */
 178 void free_dc_ptr( DC *dc )
 179 {
 180     assert( dc->refcount == 1 );
 181
 182     while (dc->physDev != &dc->nulldrv) pop_dc_driver( dc, dc->physDev );
 183     free_gdi_handle( dc->hSelf );
 184     free_dc_state( dc );
 185 }
 186
 187
 188 /***********************************************************************
 189  *           get_dc_ptr
 190  *
 191  * Retrieve a DC pointer but release the GDI lock.
 192  */
 193 DC *get_dc_ptr( HDC hdc )
 194 {
 195     DC *dc = get_dc_obj( hdc );
 196     if (!dc) return NULL;
 197
 198     if (!InterlockedCompareExchange( &dc->refcount, 1, 0 ))
 199     {
 200         dc->thread = GetCurrentThreadId();
 201     }
 202     else if (dc->thread != GetCurrentThreadId())
 203     {
 204         WARN( "dc %p belongs to thread %04x\n", hdc, dc->thread );
 205         GDI_ReleaseObj( hdc );
 206         return NULL;
 207     }
 208     else InterlockedIncrement( &dc->refcount );
 209
 210     GDI_ReleaseObj( hdc );
 211     return dc;
 212 }
 213
 214
 215 /***********************************************************************
 216  *           release_dc_ptr
 217  */
 218 void release_dc_ptr( DC *dc )
 219 {
 220     LONG ref;
 221
 222     dc->thread = 0;
 223     ref = InterlockedDecrement( &dc->refcount );
 224     assert( ref >= 0 );
 225     if (ref) dc->thread = GetCurrentThreadId();  /* we still own it */
 226 }
 227
 228
 229 /***********************************************************************
 230  *           update_dc
 231  *
 232  * Make sure the DC vis region is up to date.
 233  * This function may call up to USER so the GDI lock should _not_
 234  * be held when calling it.
 235  */
 236 void update_dc( DC *dc )
 237 {
 238     if (InterlockedExchange( &dc->dirty, 0 ) && dc->hookProc)
 239         dc->hookProc( dc->hSelf, DCHC_INVALIDVISRGN, dc->dwHookData, 0 );
 240 }
 241
 242
 243 /***********************************************************************
 244  *           push_dc_driver
 245  *
 246  * Push a driver on top of the DC driver stack.
 247  */
 248 void push_dc_driver( DC * dc, PHYSDEV physdev, const DC_FUNCTIONS *funcs )
 249 {
 250     physdev->funcs = funcs;
 251     physdev->next = dc->physDev;
 252     physdev->hdc = dc->hSelf;
 253     dc->physDev = physdev;
 254 }
 255
 256
 257 /***********************************************************************
 258  *           pop_dc_driver
 259  *
 260  * Pop the top driver from the DC driver stack.
 261  */
 262 void pop_dc_driver( DC * dc, PHYSDEV physdev )
 263 {
 264     assert( physdev == dc->physDev );
 265     assert( physdev != &dc->nulldrv );
 266     dc->physDev = physdev->next;
 267     physdev->funcs->pDeleteDC( physdev );
 268 }
 269
 270
 271 /***********************************************************************
 272  *           DC_DeleteObject
 273  */
 274 static BOOL DC_DeleteObject( HGDIOBJ handle )
 275 {
 276     return DeleteDC( handle );
 277 }
 278
 279
 280 /***********************************************************************
 281  *           DC_InitDC
 282  *
 283  * Setup device-specific DC values for a newly created DC.
 284  */
 285 void DC_InitDC( DC* dc )
 286 {
 287     PHYSDEV physdev = GET_DC_PHYSDEV( dc, pRealizeDefaultPalette );
 288     physdev->funcs->pRealizeDefaultPalette( physdev );
 289     SetTextColor( dc->hSelf, dc->textColor );
 290     SetBkColor( dc->hSelf, dc->backgroundColor );
 291     SelectObject( dc->hSelf, dc->hPen );
 292     SelectObject( dc->hSelf, dc->hBrush );
 293     SelectObject( dc->hSelf, dc->hFont );
 294     CLIPPING_UpdateGCRegion( dc );
 295     SetVirtualResolution( dc->hSelf, 0, 0, 0, 0 );
 296 }
 297
 298
 299 /***********************************************************************
 300  *           DC_InvertXform
 301  *
 302  * Computes the inverse of the transformation xformSrc and stores it to
 303  * xformDest. Returns TRUE if successful or FALSE if the xformSrc matrix
 304  * is singular.
 305  */
 306 static BOOL DC_InvertXform( const XFORM *xformSrc, XFORM *xformDest )
 307 {
 308     double determinant;
 309
 310     determinant = xformSrc->eM11*xformSrc->eM22 -
 311         xformSrc->eM12*xformSrc->eM21;
 312     if (determinant > -1e-12 && determinant < 1e-12)
 313         return FALSE;
 314
 315     xformDest->eM11 =  xformSrc->eM22 / determinant;
 316     xformDest->eM12 = -xformSrc->eM12 / determinant;
 317     xformDest->eM21 = -xformSrc->eM21 / determinant;
 318     xformDest->eM22 =  xformSrc->eM11 / determinant;
 319     xformDest->eDx  = -xformSrc->eDx * xformDest->eM11 -
 320                        xformSrc->eDy * xformDest->eM21;
 321     xformDest->eDy  = -xformSrc->eDx * xformDest->eM12 -
 322                        xformSrc->eDy * xformDest->eM22;
 323
 324     return TRUE;
 325 }
 326
 327 /* Construct a transformation to do the window-to-viewport conversion */
 328 static void construct_window_to_viewport(DC *dc, XFORM *xform)
 329 {
 330     double scaleX, scaleY;
 331     scaleX = (double)dc->vportExtX / (double)dc->wndExtX;
 332     scaleY = (double)dc->vportExtY / (double)dc->wndExtY;
 333
 334     if (dc->layout & LAYOUT_RTL) scaleX = -scaleX;
 335     xform->eM11 = scaleX;
 336     xform->eM12 = 0.0;
 337     xform->eM21 = 0.0;
 338     xform->eM22 = scaleY;
 339     xform->eDx  = (double)dc->vportOrgX - scaleX * (double)dc->wndOrgX;
 340     xform->eDy  = (double)dc->vportOrgY - scaleY * (double)dc->wndOrgY;
 341     if (dc->layout & LAYOUT_RTL) xform->eDx = dc->vis_rect.right - dc->vis_rect.left - 1 - xform->eDx;
 342 }
 343
 344 /***********************************************************************
 345  *           DC_UpdateXforms
 346  *
 347  * Updates the xformWorld2Vport, xformVport2World and vport2WorldValid
 348  * fields of the specified DC by creating a transformation that
 349  * represents the current mapping mode and combining it with the DC's
 350  * world transform. This function should be called whenever the
 351  * parameters associated with the mapping mode (window and viewport
 352  * extents and origins) or the world transform change.
 353  */
 354 void DC_UpdateXforms( DC *dc )
 355 {
 356     XFORM xformWnd2Vport, oldworld2vport;
 357
 358     construct_window_to_viewport(dc, &xformWnd2Vport);
 359
 360     oldworld2vport = dc->xformWorld2Vport;
 361     /* Combine with the world transformation */
 362     CombineTransform( &dc->xformWorld2Vport, &dc->xformWorld2Wnd,
 363         &xformWnd2Vport );
 364
 365     /* Create inverse of world-to-viewport transformation */
 366     dc->vport2WorldValid = DC_InvertXform( &dc->xformWorld2Vport,
 367         &dc->xformVport2World );
 368
 369     /* Reselect the font and pen back into the dc so that the size
 370        gets updated. */
 371     if (memcmp(&oldworld2vport, &dc->xformWorld2Vport, sizeof(oldworld2vport)) &&
 372         !GdiIsMetaFileDC(dc->hSelf))
 373     {
 374         SelectObject(dc->hSelf, GetCurrentObject(dc->hSelf, OBJ_FONT));
 375         SelectObject(dc->hSelf, GetCurrentObject(dc->hSelf, OBJ_PEN));
 376     }
 377 }
 378
 379
 380 /***********************************************************************
 381  *           nulldrv_SaveDC
 382  */
 383 INT CDECL nulldrv_SaveDC( PHYSDEV dev )
 384 {
 385     DC *newdc, *dc = get_nulldrv_dc( dev );
 386
 387     if (!(newdc = HeapAlloc( GetProcessHeap(), 0, sizeof(*newdc )))) return 0;
 388     newdc->flags            = dc->flags;
 389     newdc->layout           = dc->layout;
 390     newdc->hPen             = dc->hPen;
 391     newdc->hBrush           = dc->hBrush;
 392     newdc->hFont            = dc->hFont;
 393     newdc->hBitmap          = dc->hBitmap;
 394     newdc->hDevice          = dc->hDevice;
 395     newdc->hPalette         = dc->hPalette;
 396     newdc->ROPmode          = dc->ROPmode;
 397     newdc->polyFillMode     = dc->polyFillMode;
 398     newdc->stretchBltMode   = dc->stretchBltMode;
 399     newdc->relAbsMode       = dc->relAbsMode;
 400     newdc->backgroundMode   = dc->backgroundMode;
 401     newdc->backgroundColor  = dc->backgroundColor;
 402     newdc->textColor        = dc->textColor;
 403     newdc->dcBrushColor     = dc->dcBrushColor;
 404     newdc->dcPenColor       = dc->dcPenColor;
 405     newdc->brushOrgX        = dc->brushOrgX;
 406     newdc->brushOrgY        = dc->brushOrgY;
 407     newdc->mapperFlags      = dc->mapperFlags;
 408     newdc->textAlign        = dc->textAlign;
 409     newdc->charExtra        = dc->charExtra;
 410     newdc->breakExtra       = dc->breakExtra;
 411     newdc->breakRem         = dc->breakRem;
 412     newdc->MapMode          = dc->MapMode;
 413     newdc->GraphicsMode     = dc->GraphicsMode;
 414     newdc->CursPosX         = dc->CursPosX;
 415     newdc->CursPosY         = dc->CursPosY;
 416     newdc->ArcDirection     = dc->ArcDirection;
 417     newdc->xformWorld2Wnd   = dc->xformWorld2Wnd;
 418     newdc->xformWorld2Vport = dc->xformWorld2Vport;
 419     newdc->xformVport2World = dc->xformVport2World;
 420     newdc->vport2WorldValid = dc->vport2WorldValid;
 421     newdc->wndOrgX          = dc->wndOrgX;
 422     newdc->wndOrgY          = dc->wndOrgY;
 423     newdc->wndExtX          = dc->wndExtX;
 424     newdc->wndExtY          = dc->wndExtY;
 425     newdc->vportOrgX        = dc->vportOrgX;
 426     newdc->vportOrgY        = dc->vportOrgY;
 427     newdc->vportExtX        = dc->vportExtX;
 428     newdc->vportExtY        = dc->vportExtY;
 429     newdc->virtual_res      = dc->virtual_res;
 430     newdc->virtual_size     = dc->virtual_size;
 431     newdc->BoundsRect       = dc->BoundsRect;
 432     newdc->gdiFont          = dc->gdiFont;
 433
 434     PATH_InitGdiPath( &newdc->path );
 435
 436     /* Get/SetDCState() don't change hVisRgn field ("Undoc. Windows" p.559). */
 437
 438     newdc->hVisRgn      = 0;
 439     newdc->hClipRgn     = 0;
 440     newdc->hMetaRgn     = 0;
 441     newdc->hMetaClipRgn = 0;
 442     if (dc->hClipRgn)
 443     {
 444         newdc->hClipRgn = CreateRectRgn( 0, 0, 0, 0 );
 445         CombineRgn( newdc->hClipRgn, dc->hClipRgn, 0, RGN_COPY );
 446     }
 447     if (dc->hMetaRgn)
 448     {
 449         newdc->hMetaRgn = CreateRectRgn( 0, 0, 0, 0 );
 450         CombineRgn( newdc->hMetaRgn, dc->hMetaRgn, 0, RGN_COPY );
 451     }
 452
 453     /* don't bother recomputing hMetaClipRgn, we'll do that in SetDCState */
 454
 455     if (!PATH_AssignGdiPath( &newdc->path, &dc->path ))
 456     {
 457         release_dc_ptr( dc );
 458         free_dc_state( newdc );
 459         return 0;
 460     }
 461
 462     newdc->saved_dc = dc->saved_dc;
 463     dc->saved_dc = newdc;
 464     return ++dc->saveLevel;
 465 }
 466
 467
 468 /***********************************************************************
 469  *           restore_dc_state
 470  */
 471 BOOL CDECL nulldrv_RestoreDC( PHYSDEV dev, INT level )
 472 {
 473     DC *dcs, *first_dcs, *dc = get_nulldrv_dc( dev );
 474     INT save_level;
 475
 476     /* find the state level to restore */
 477
 478     if (abs(level) > dc->saveLevel || level == 0) return FALSE;
 479     if (level < 0) level = dc->saveLevel + level + 1;
 480     first_dcs = dc->saved_dc;
 481     for (dcs = first_dcs, save_level = dc->saveLevel; save_level > level; save_level--)
 482         dcs = dcs->saved_dc;
 483
 484     /* restore the state */
 485
 486     if (!PATH_AssignGdiPath( &dc->path, &dcs->path )) return FALSE;
 487
 488     dc->flags            = dcs->flags;
 489     dc->layout           = dcs->layout;
 490     dc->hDevice          = dcs->hDevice;
 491     dc->ROPmode          = dcs->ROPmode;
 492     dc->polyFillMode     = dcs->polyFillMode;
 493     dc->stretchBltMode   = dcs->stretchBltMode;
 494     dc->relAbsMode       = dcs->relAbsMode;
 495     dc->backgroundMode   = dcs->backgroundMode;
 496     dc->backgroundColor  = dcs->backgroundColor;
 497     dc->textColor        = dcs->textColor;
 498     dc->dcBrushColor     = dcs->dcBrushColor;
 499     dc->dcPenColor       = dcs->dcPenColor;
 500     dc->brushOrgX        = dcs->brushOrgX;
 501     dc->brushOrgY        = dcs->brushOrgY;
 502     dc->mapperFlags      = dcs->mapperFlags;
 503     dc->textAlign        = dcs->textAlign;
 504     dc->charExtra        = dcs->charExtra;
 505     dc->breakExtra       = dcs->breakExtra;
 506     dc->breakRem         = dcs->breakRem;
 507     dc->MapMode          = dcs->MapMode;
 508     dc->GraphicsMode     = dcs->GraphicsMode;
 509     dc->CursPosX         = dcs->CursPosX;
 510     dc->CursPosY         = dcs->CursPosY;
 511     dc->ArcDirection     = dcs->ArcDirection;
 512     dc->xformWorld2Wnd   = dcs->xformWorld2Wnd;
 513     dc->xformWorld2Vport = dcs->xformWorld2Vport;
 514     dc->xformVport2World = dcs->xformVport2World;
 515     dc->vport2WorldValid = dcs->vport2WorldValid;
 516     dc->BoundsRect       = dcs->BoundsRect;
 517
 518     dc->wndOrgX          = dcs->wndOrgX;
 519     dc->wndOrgY          = dcs->wndOrgY;
 520     dc->wndExtX          = dcs->wndExtX;
 521     dc->wndExtY          = dcs->wndExtY;
 522     dc->vportOrgX        = dcs->vportOrgX;
 523     dc->vportOrgY        = dcs->vportOrgY;
 524     dc->vportExtX        = dcs->vportExtX;
 525     dc->vportExtY        = dcs->vportExtY;
 526     dc->virtual_res      = dcs->virtual_res;
 527     dc->virtual_size     = dcs->virtual_size;
 528
 529     if (dcs->hClipRgn)
 530     {
 531         if (!dc->hClipRgn) dc->hClipRgn = CreateRectRgn( 0, 0, 0, 0 );
 532         CombineRgn( dc->hClipRgn, dcs->hClipRgn, 0, RGN_COPY );
 533     }
 534     else
 535     {
 536         if (dc->hClipRgn) DeleteObject( dc->hClipRgn );
 537         dc->hClipRgn = 0;
 538     }
 539     if (dcs->hMetaRgn)
 540     {
 541         if (!dc->hMetaRgn) dc->hMetaRgn = CreateRectRgn( 0, 0, 0, 0 );
 542         CombineRgn( dc->hMetaRgn, dcs->hMetaRgn, 0, RGN_COPY );
 543     }
 544     else
 545     {
 546         if (dc->hMetaRgn) DeleteObject( dc->hMetaRgn );
 547         dc->hMetaRgn = 0;
 548     }
 549     DC_UpdateXforms( dc );
 550     CLIPPING_UpdateGCRegion( dc );
 551
 552     SelectObject( dev->hdc, dcs->hBitmap );
 553     SelectObject( dev->hdc, dcs->hBrush );
 554     SelectObject( dev->hdc, dcs->hFont );
 555     SelectObject( dev->hdc, dcs->hPen );
 556     SetBkColor( dev->hdc, dcs->backgroundColor);
 557     SetTextColor( dev->hdc, dcs->textColor);
 558     GDISelectPalette( dev->hdc, dcs->hPalette, FALSE );
 559
 560     dc->saved_dc  = dcs->saved_dc;
 561     dcs->saved_dc = 0;
 562     dc->saveLevel = save_level - 1;
 563
 564     /* now destroy all the saved DCs */
 565
 566     while (first_dcs)
 567     {
 568         DC *next = first_dcs->saved_dc;
 569         free_dc_state( first_dcs );
 570         first_dcs = next;
 571     }
 572     return TRUE;
 573 }
 574
 575
 576 /***********************************************************************
 577  *           SaveDC    (GDI32.@)
 578  */
 579 INT WINAPI SaveDC( HDC hdc )
 580 {
 581     DC * dc;
 582     INT ret = 0;
 583
 584     if ((dc = get_dc_ptr( hdc )))
 585     {
 586         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSaveDC );
 587         ret = physdev->funcs->pSaveDC( physdev );
 588         release_dc_ptr( dc );
 589     }
 590     return ret;
 591 }
 592
 593
 594 /***********************************************************************
 595  *           RestoreDC    (GDI32.@)
 596  */
 597 BOOL WINAPI RestoreDC( HDC hdc, INT level )
 598 {
 599     DC *dc;
 600     BOOL success = FALSE;
 601
 602     TRACE("%p %d\n", hdc, level );
 603     if ((dc = get_dc_ptr( hdc )))
 604     {
 605         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pRestoreDC );
 606         update_dc( dc );
 607         success = physdev->funcs->pRestoreDC( physdev, level );
 608         release_dc_ptr( dc );
 609     }
 610     return success;
 611 }
 612
 613
 614 /***********************************************************************
 615  *           CreateDCW    (GDI32.@)
 616  */
 617 HDC WINAPI CreateDCW( LPCWSTR driver, LPCWSTR device, LPCWSTR output,
 618                       const DEVMODEW *initData )
 619 {
 620     HDC hdc;
 621     DC * dc;
 622     const DC_FUNCTIONS *funcs;
 623     WCHAR buf[300];
 624
 625     GDI_CheckNotLock();
 626
 627     if (!device || !DRIVER_GetDriverName( device, buf, 300 ))
 628     {
 629         if (!driver)
 630         {
 631             ERR( "no device found for %s\n", debugstr_w(device) );
 632             return 0;
 633         }
 634         strcpyW(buf, driver);
 635     }
 636
 637     if (!(funcs = DRIVER_load_driver( buf )))
 638     {
 639         ERR( "no driver found for %s\n", debugstr_w(buf) );
 640         return 0;
 641     }
 642     if (!(dc = alloc_dc_ptr( OBJ_DC ))) goto error;
 643     hdc = dc->hSelf;
 644
 645     dc->hBitmap = GDI_inc_ref_count( GetStockObject( DEFAULT_BITMAP ));
 646     if (!(dc->hVisRgn = CreateRectRgn( 0, 0, 1, 1 ))) goto error;
 647
 648     TRACE("(driver=%s, device=%s, output=%s): returning %p\n",
 649           debugstr_w(driver), debugstr_w(device), debugstr_w(output), dc->hSelf );
 650
 651     if (funcs->pCreateDC)
 652     {
 653         PHYSDEV physdev;
 654         if (!funcs->pCreateDC( hdc, &physdev, buf, device, output, initData ))
 655         {
 656             WARN("creation aborted by device\n" );
 657             goto error;
 658         }
 659         push_dc_driver( dc, physdev, funcs );
 660     }
 661
 662     dc->vis_rect.left   = 0;
 663     dc->vis_rect.top    = 0;
 664     dc->vis_rect.right  = GetDeviceCaps( hdc, DESKTOPHORZRES );
 665     dc->vis_rect.bottom = GetDeviceCaps( hdc, DESKTOPVERTRES );
 666     SetRectRgn(dc->hVisRgn, dc->vis_rect.left, dc->vis_rect.top, dc->vis_rect.right, dc->vis_rect.bottom);
 667
 668     DC_InitDC( dc );
 669     release_dc_ptr( dc );
 670     return hdc;
 671
 672 error:
 673     if (dc) free_dc_ptr( dc );
 674     return 0;
 675 }
 676
 677
 678 /***********************************************************************
 679  *           CreateDCA    (GDI32.@)
 680  */
 681 HDC WINAPI CreateDCA( LPCSTR driver, LPCSTR device, LPCSTR output,
 682                       const DEVMODEA *initData )
 683 {
 684     UNICODE_STRING driverW, deviceW, outputW;
 685     DEVMODEW *initDataW;
 686     HDC ret;
 687
 688     if (driver) RtlCreateUnicodeStringFromAsciiz(&driverW, driver);
 689     else driverW.Buffer = NULL;
 690
 691     if (device) RtlCreateUnicodeStringFromAsciiz(&deviceW, device);
 692     else deviceW.Buffer = NULL;
 693
 694     if (output) RtlCreateUnicodeStringFromAsciiz(&outputW, output);
 695     else outputW.Buffer = NULL;
 696
 697     initDataW = NULL;
 698     if (initData)
 699     {
 700         /* don't convert initData for DISPLAY driver, it's not used */
 701         if (!driverW.Buffer || strcmpiW( driverW.Buffer, displayW ))
 702             initDataW = GdiConvertToDevmodeW(initData);
 703     }
 704
 705     ret = CreateDCW( driverW.Buffer, deviceW.Buffer, outputW.Buffer, initDataW );
 706
 707     RtlFreeUnicodeString(&driverW);
 708     RtlFreeUnicodeString(&deviceW);
 709     RtlFreeUnicodeString(&outputW);
 710     HeapFree(GetProcessHeap(), 0, initDataW);
 711     return ret;
 712 }
 713
 714
 715 /***********************************************************************
 716  *           CreateICA    (GDI32.@)
 717  */
 718 HDC WINAPI CreateICA( LPCSTR driver, LPCSTR device, LPCSTR output,
 719                           const DEVMODEA* initData )
 720 {
 721       /* Nothing special yet for ICs */
 722     return CreateDCA( driver, device, output, initData );
 723 }
 724
 725
 726 /***********************************************************************
 727  *           CreateICW    (GDI32.@)
 728  */
 729 HDC WINAPI CreateICW( LPCWSTR driver, LPCWSTR device, LPCWSTR output,
 730                           const DEVMODEW* initData )
 731 {
 732       /* Nothing special yet for ICs */
 733     return CreateDCW( driver, device, output, initData );
 734 }
 735
 736
 737 /***********************************************************************
 738  *           CreateCompatibleDC   (GDI32.@)
 739  */
 740 HDC WINAPI CreateCompatibleDC( HDC hdc )
 741 {
 742     DC *dc, *origDC;
 743     HDC ret;
 744     const DC_FUNCTIONS *funcs = NULL;
 745     PHYSDEV physDev = NULL;
 746
 747     GDI_CheckNotLock();
 748
 749     if (hdc)
 750     {
 751         if (!(origDC = get_dc_ptr( hdc ))) return 0;
 752         physDev = GET_DC_PHYSDEV( origDC, pCreateDC );
 753         if (physDev != &origDC->nulldrv) funcs = physDev->funcs;
 754         else physDev = NULL;
 755         release_dc_ptr( origDC );
 756     }
 757
 758     if (!funcs && !(funcs = DRIVER_get_display_driver())) return 0;
 759
 760     if (!(dc = alloc_dc_ptr( OBJ_MEMDC ))) goto error;
 761
 762     TRACE("(%p): returning %p\n", hdc, dc->hSelf );
 763
 764     dc->hBitmap = GDI_inc_ref_count( GetStockObject( DEFAULT_BITMAP ));
 765     dc->vis_rect.left   = 0;
 766     dc->vis_rect.top    = 0;
 767     dc->vis_rect.right  = 1;
 768     dc->vis_rect.bottom = 1;
 769     if (!(dc->hVisRgn = CreateRectRgn( 0, 0, 1, 1 ))) goto error;   /* default bitmap is 1x1 */
 770
 771     ret = dc->hSelf;
 772
 773     /* Pass the driver-specific physical device info into
 774      * the new DC. The driver may use this read-only info
 775      * while creating the compatible DC. */
 776     if (funcs->pCreateDC)
 777     {
 778         if (!funcs->pCreateDC( dc->hSelf, &physDev, NULL, NULL, NULL, NULL ))
 779         {
 780             WARN("creation aborted by device\n");
 781             goto error;
 782         }
 783         push_dc_driver( dc, physDev, funcs );
 784     }
 785     DC_InitDC( dc );
 786     release_dc_ptr( dc );
 787     return ret;
 788
 789 error:
 790     if (dc) free_dc_ptr( dc );
 791     return 0;
 792 }
 793
 794
 795 /***********************************************************************
 796  *           DeleteDC    (GDI32.@)
 797  */
 798 BOOL WINAPI DeleteDC( HDC hdc )
 799 {
 800     DC * dc;
 801
 802     TRACE("%p\n", hdc );
 803
 804     GDI_CheckNotLock();
 805
 806     if (!(dc = get_dc_ptr( hdc ))) return FALSE;
 807     if (dc->refcount != 1)
 808     {
 809         FIXME( "not deleting busy DC %p refcount %u\n", dc->hSelf, dc->refcount );
 810         release_dc_ptr( dc );
 811         return FALSE;
 812     }
 813
 814     /* Call hook procedure to check whether is it OK to delete this DC */
 815     if (dc->hookProc && !dc->hookProc( hdc, DCHC_DELETEDC, dc->dwHookData, 0 ))
 816     {
 817         release_dc_ptr( dc );
 818         return TRUE;
 819     }
 820
 821     while (dc->saveLevel)
 822     {
 823         DC *dcs = dc->saved_dc;
 824         dc->saved_dc = dcs->saved_dc;
 825         dc->saveLevel--;
 826         free_dc_state( dcs );
 827     }
 828
 829     SelectObject( hdc, GetStockObject(BLACK_PEN) );
 830     SelectObject( hdc, GetStockObject(WHITE_BRUSH) );
 831     SelectObject( hdc, GetStockObject(SYSTEM_FONT) );
 832     SelectObject( hdc, GetStockObject(DEFAULT_BITMAP) );
 833
 834     free_dc_ptr( dc );
 835     return TRUE;
 836 }
 837
 838
 839 /***********************************************************************
 840  *           ResetDCW    (GDI32.@)
 841  */
 842 HDC WINAPI ResetDCW( HDC hdc, const DEVMODEW *devmode )
 843 {
 844     DC *dc;
 845     HDC ret = 0;
 846
 847     if ((dc = get_dc_ptr( hdc )))
 848     {
 849         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pResetDC );
 850         ret = physdev->funcs->pResetDC( physdev, devmode );
 851         if (ret)  /* reset the visible region */
 852         {
 853             dc->dirty = 0;
 854             dc->vis_rect.left   = 0;
 855             dc->vis_rect.top    = 0;
 856             dc->vis_rect.right  = GetDeviceCaps( hdc, DESKTOPHORZRES );
 857             dc->vis_rect.bottom = GetDeviceCaps( hdc, DESKTOPVERTRES );
 858             SetRectRgn( dc->hVisRgn, dc->vis_rect.left, dc->vis_rect.top,
 859                         dc->vis_rect.right, dc->vis_rect.bottom );
 860             CLIPPING_UpdateGCRegion( dc );
 861         }
 862         release_dc_ptr( dc );
 863     }
 864     return ret;
 865 }
 866
 867
 868 /***********************************************************************
 869  *           ResetDCA    (GDI32.@)
 870  */
 871 HDC WINAPI ResetDCA( HDC hdc, const DEVMODEA *devmode )
 872 {
 873     DEVMODEW *devmodeW;
 874     HDC ret;
 875
 876     if (devmode) devmodeW = GdiConvertToDevmodeW(devmode);
 877     else devmodeW = NULL;
 878
 879     ret = ResetDCW(hdc, devmodeW);
 880
 881     HeapFree(GetProcessHeap(), 0, devmodeW);
 882     return ret;
 883 }
 884
 885
 886 /***********************************************************************
 887  *           GetDeviceCaps    (GDI32.@)
 888  */
 889 INT WINAPI GetDeviceCaps( HDC hdc, INT cap )
 890 {
 891     DC *dc;
 892     INT ret = 0;
 893
 894     if ((dc = get_dc_ptr( hdc )))
 895     {
 896         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pGetDeviceCaps );
 897         ret = physdev->funcs->pGetDeviceCaps( physdev, cap );
 898         release_dc_ptr( dc );
 899     }
 900     return ret;
 901 }
 902
 903
 904 /***********************************************************************
 905  *              GetBkColor (GDI32.@)
 906  */
 907 COLORREF WINAPI GetBkColor( HDC hdc )
 908 {
 909     COLORREF ret = 0;
 910     DC * dc = get_dc_ptr( hdc );
 911     if (dc)
 912     {
 913         ret = dc->backgroundColor;
 914         release_dc_ptr( dc );
 915     }
 916     return ret;
 917 }
 918
 919
 920 /***********************************************************************
 921  *           SetBkColor    (GDI32.@)
 922  */
 923 COLORREF WINAPI SetBkColor( HDC hdc, COLORREF color )
 924 {
 925     COLORREF ret = CLR_INVALID;
 926     DC * dc = get_dc_ptr( hdc );
 927
 928     TRACE("hdc=%p color=0x%08x\n", hdc, color);
 929
 930     if (dc)
 931     {
 932         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetBkColor );
 933         color = physdev->funcs->pSetBkColor( physdev, color );
 934         if (color != CLR_INVALID)
 935         {
 936             ret = dc->backgroundColor;
 937             dc->backgroundColor = color;
 938         }
 939         release_dc_ptr( dc );
 940     }
 941     return ret;
 942 }
 943
 944
 945 /***********************************************************************
 946  *              GetTextColor (GDI32.@)
 947  */
 948 COLORREF WINAPI GetTextColor( HDC hdc )
 949 {
 950     COLORREF ret = 0;
 951     DC * dc = get_dc_ptr( hdc );
 952     if (dc)
 953     {
 954         ret = dc->textColor;
 955         release_dc_ptr( dc );
 956     }
 957     return ret;
 958 }
 959
 960
 961 /***********************************************************************
 962  *           SetTextColor    (GDI32.@)
 963  */
 964 COLORREF WINAPI SetTextColor( HDC hdc, COLORREF color )
 965 {
 966     COLORREF ret = CLR_INVALID;
 967     DC * dc = get_dc_ptr( hdc );
 968
 969     TRACE(" hdc=%p color=0x%08x\n", hdc, color);
 970
 971     if (dc)
 972     {
 973         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetTextColor );
 974         color = physdev->funcs->pSetTextColor( physdev, color );
 975         if (color != CLR_INVALID)
 976         {
 977             ret = dc->textColor;
 978             dc->textColor = color;
 979         }
 980         release_dc_ptr( dc );
 981     }
 982     return ret;
 983 }
 984
 985
 986 /***********************************************************************
 987  *              GetTextAlign (GDI32.@)
 988  */
 989 UINT WINAPI GetTextAlign( HDC hdc )
 990 {
 991     UINT ret = 0;
 992     DC * dc = get_dc_ptr( hdc );
 993     if (dc)
 994     {
 995         ret = dc->textAlign;
 996         release_dc_ptr( dc );
 997     }
 998     return ret;
 999 }
1000
1001
1002 /***********************************************************************
1003  *           SetTextAlign    (GDI32.@)
1004  */
1005 UINT WINAPI SetTextAlign( HDC hdc, UINT align )
1006 {
1007     UINT ret = GDI_ERROR;
1008     DC *dc = get_dc_ptr( hdc );
1009
1010     TRACE("hdc=%p align=%d\n", hdc, align);
1011
1012     if (dc)
1013     {
1014         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetTextAlign );
1015         align = physdev->funcs->pSetTextAlign( physdev, align );
1016         if (align != GDI_ERROR)
1017         {
1018             ret = dc->textAlign;
1019             dc->textAlign = align;
1020         }
1021         release_dc_ptr( dc );
1022     }
1023     return ret;
1024 }
1025
1026 /***********************************************************************
1027  *           GetDCOrgEx  (GDI32.@)
1028  */
1029 BOOL WINAPI GetDCOrgEx( HDC hDC, LPPOINT lpp )
1030 {
1031     DC * dc;
1032
1033     if (!lpp) return FALSE;
1034     if (!(dc = get_dc_ptr( hDC ))) return FALSE;
1035     lpp->x = dc->vis_rect.left;
1036     lpp->y = dc->vis_rect.top;
1037     release_dc_ptr( dc );
1038     return TRUE;
1039 }
1040
1041
1042 /***********************************************************************
1043  *              GetGraphicsMode (GDI32.@)
1044  */
1045 INT WINAPI GetGraphicsMode( HDC hdc )
1046 {
1047     INT ret = 0;
1048     DC * dc = get_dc_ptr( hdc );
1049     if (dc)
1050     {
1051         ret = dc->GraphicsMode;
1052         release_dc_ptr( dc );
1053     }
1054     return ret;
1055 }
1056
1057
1058 /***********************************************************************
1059  *           SetGraphicsMode    (GDI32.@)
1060  */
1061 INT WINAPI SetGraphicsMode( HDC hdc, INT mode )
1062 {
1063     INT ret = 0;
1064     DC *dc = get_dc_ptr( hdc );
1065
1066     /* One would think that setting the graphics mode to GM_COMPATIBLE
1067      * would also reset the world transformation matrix to the unity
1068      * matrix. However, in Windows, this is not the case. This doesn't
1069      * make a lot of sense to me, but that's the way it is.
1070      */
1071     if (!dc) return 0;
1072     if ((mode > 0) && (mode <= GM_LAST))
1073     {
1074         ret = dc->GraphicsMode;
1075         dc->GraphicsMode = mode;
1076     }
1077     release_dc_ptr( dc );
1078     return ret;
1079 }
1080
1081
1082 /***********************************************************************
1083  *              GetArcDirection (GDI32.@)
1084  */
1085 INT WINAPI GetArcDirection( HDC hdc )
1086 {
1087     INT ret = 0;
1088     DC * dc = get_dc_ptr( hdc );
1089     if (dc)
1090     {
1091         ret = dc->ArcDirection;
1092         release_dc_ptr( dc );
1093     }
1094     return ret;
1095 }
1096
1097
1098 /***********************************************************************
1099  *           SetArcDirection    (GDI32.@)
1100  */
1101 INT WINAPI SetArcDirection( HDC hdc, INT dir )
1102 {
1103     DC * dc;
1104     INT ret = 0;
1105
1106     if (dir != AD_COUNTERCLOCKWISE && dir != AD_CLOCKWISE)
1107     {
1108         SetLastError(ERROR_INVALID_PARAMETER);
1109         return 0;
1110     }
1111
1112     if ((dc = get_dc_ptr( hdc )))
1113     {
1114         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetArcDirection );
1115         dir = physdev->funcs->pSetArcDirection( physdev, dir );
1116         if (dir)
1117         {
1118             ret = dc->ArcDirection;
1119             dc->ArcDirection = dir;
1120         }
1121         release_dc_ptr( dc );
1122     }
1123     return ret;
1124 }
1125
1126
1127 /***********************************************************************
1128  *           GetWorldTransform    (GDI32.@)
1129  */
1130 BOOL WINAPI GetWorldTransform( HDC hdc, LPXFORM xform )
1131 {
1132     DC * dc;
1133     if (!xform) return FALSE;
1134     if (!(dc = get_dc_ptr( hdc ))) return FALSE;
1135     *xform = dc->xformWorld2Wnd;
1136     release_dc_ptr( dc );
1137     return TRUE;
1138 }
1139
1140
1141 /***********************************************************************
1142  *           GetTransform    (GDI32.@)
1143  *
1144  * Undocumented
1145  *
1146  * Returns one of the co-ordinate space transforms
1147  *
1148  * PARAMS
1149  *    hdc   [I] Device context.
1150  *    which [I] Which xform to return:
1151  *                  0x203 World -> Page transform (that set by SetWorldTransform).
1152  *                  0x304 Page -> Device transform (the mapping mode transform).
1153  *                  0x204 World -> Device transform (the combination of the above two).
1154  *                  0x402 Device -> World transform (the inversion of the above).
1155  *    xform [O] The xform.
1156  *
1157  */
1158 BOOL WINAPI GetTransform( HDC hdc, DWORD which, XFORM *xform )
1159 {
1160     BOOL ret = TRUE;
1161     DC *dc = get_dc_ptr( hdc );
1162     if (!dc) return FALSE;
1163
1164     switch(which)
1165     {
1166     case 0x203:
1167         *xform = dc->xformWorld2Wnd;
1168         break;
1169
1170     case 0x304:
1171         construct_window_to_viewport(dc, xform);
1172         break;
1173
1174     case 0x204:
1175         *xform = dc->xformWorld2Vport;
1176         break;
1177
1178     case 0x402:
1179         *xform = dc->xformVport2World;
1180         break;
1181
1182     default:
1183         FIXME("Unknown code %x\n", which);
1184         ret = FALSE;
1185     }
1186
1187     release_dc_ptr( dc );
1188     return ret;
1189 }
1190
1191
1192 /****************************************************************************
1193  * CombineTransform [GDI32.@]
1194  * Combines two transformation matrices.
1195  *
1196  * PARAMS
1197  *    xformResult [O] Stores the result of combining the two matrices
1198  *    xform1      [I] Specifies the first matrix to apply
1199  *    xform2      [I] Specifies the second matrix to apply
1200  *
1201  * REMARKS
1202  *    The same matrix can be passed in for more than one of the parameters.
1203  *
1204  * RETURNS
1205  *  Success: TRUE.
1206  *  Failure: FALSE. Use GetLastError() to determine the cause.
1207  */
1208 BOOL WINAPI CombineTransform( LPXFORM xformResult, const XFORM *xform1,
1209     const XFORM *xform2 )
1210 {
1211     XFORM xformTemp;
1212
1213     /* Check for illegal parameters */
1214     if (!xformResult || !xform1 || !xform2)
1215         return FALSE;
1216
1217     /* Create the result in a temporary XFORM, since xformResult may be
1218      * equal to xform1 or xform2 */
1219     xformTemp.eM11 = xform1->eM11 * xform2->eM11 +
1220                      xform1->eM12 * xform2->eM21;
1221     xformTemp.eM12 = xform1->eM11 * xform2->eM12 +
1222                      xform1->eM12 * xform2->eM22;
1223     xformTemp.eM21 = xform1->eM21 * xform2->eM11 +
1224                      xform1->eM22 * xform2->eM21;
1225     xformTemp.eM22 = xform1->eM21 * xform2->eM12 +
1226                      xform1->eM22 * xform2->eM22;
1227     xformTemp.eDx  = xform1->eDx  * xform2->eM11 +
1228                      xform1->eDy  * xform2->eM21 +
1229                      xform2->eDx;
1230     xformTemp.eDy  = xform1->eDx  * xform2->eM12 +
1231                      xform1->eDy  * xform2->eM22 +
1232                      xform2->eDy;
1233
1234     /* Copy the result to xformResult */
1235     *xformResult = xformTemp;
1236
1237     return TRUE;
1238 }
1239
1240
1241 /***********************************************************************
1242  *           SetDCHook   (GDI32.@)
1243  *
1244  * Note: this doesn't exist in Win32, we add it here because user32 needs it.
1245  */
1246 BOOL WINAPI SetDCHook( HDC hdc, DCHOOKPROC hookProc, DWORD_PTR dwHookData )
1247 {
1248     DC *dc = get_dc_ptr( hdc );
1249
1250     if (!dc) return FALSE;
1251
1252     dc->dwHookData = dwHookData;
1253     dc->hookProc = hookProc;
1254     release_dc_ptr( dc );
1255     return TRUE;
1256 }
1257
1258
1259 /***********************************************************************
1260  *           GetDCHook   (GDI32.@)
1261  *
1262  * Note: this doesn't exist in Win32, we add it here because user32 needs it.
1263  */
1264 DWORD_PTR WINAPI GetDCHook( HDC hdc, DCHOOKPROC *proc )
1265 {
1266     DC *dc = get_dc_ptr( hdc );
1267     DWORD_PTR ret;
1268
1269     if (!dc) return 0;
1270     if (proc) *proc = dc->hookProc;
1271     ret = dc->dwHookData;
1272     release_dc_ptr( dc );
1273     return ret;
1274 }
1275
1276
1277 /***********************************************************************
1278  *           SetHookFlags   (GDI32.@)
1279  *
1280  * Note: this doesn't exist in Win32, we add it here because user32 needs it.
1281  */
1282 WORD WINAPI SetHookFlags( HDC hdc, WORD flags )
1283 {
1284     DC *dc = get_dc_obj( hdc );  /* not get_dc_ptr, this needs to work from any thread */
1285     LONG ret = 0;
1286
1287     if (!dc) return 0;
1288
1289     /* "Undocumented Windows" info is slightly confusing. */
1290
1291     TRACE("hDC %p, flags %04x\n",hdc,flags);
1292
1293     if (flags & DCHF_INVALIDATEVISRGN)
1294         ret = InterlockedExchange( &dc->dirty, 1 );
1295     else if (flags & DCHF_VALIDATEVISRGN || !flags)
1296         ret = InterlockedExchange( &dc->dirty, 0 );
1297
1298     GDI_ReleaseObj( hdc );
1299     return ret;
1300 }
1301
1302 /***********************************************************************
1303  *           SetICMMode    (GDI32.@)
1304  */
1305 INT WINAPI SetICMMode(HDC hdc, INT iEnableICM)
1306 {
1307 /*FIXME:  Assume that ICM is always off, and cannot be turned on */
1308     if (iEnableICM == ICM_OFF) return ICM_OFF;
1309     if (iEnableICM == ICM_ON) return 0;
1310     if (iEnableICM == ICM_QUERY) return ICM_OFF;
1311     return 0;
1312 }
1313
1314 /***********************************************************************
1315  *           GetDeviceGammaRamp    (GDI32.@)
1316  */
1317 BOOL WINAPI GetDeviceGammaRamp(HDC hDC, LPVOID ptr)
1318 {
1319     BOOL ret = FALSE;
1320     DC *dc = get_dc_ptr( hDC );
1321
1322     if( dc )
1323     {
1324         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pGetDeviceGammaRamp );
1325         ret = physdev->funcs->pGetDeviceGammaRamp( physdev, ptr );
1326         release_dc_ptr( dc );
1327     }
1328     return ret;
1329 }
1330
1331 /***********************************************************************
1332  *           SetDeviceGammaRamp    (GDI32.@)
1333  */
1334 BOOL WINAPI SetDeviceGammaRamp(HDC hDC, LPVOID ptr)
1335 {
1336     BOOL ret = FALSE;
1337     DC *dc = get_dc_ptr( hDC );
1338
1339     if( dc )
1340     {
1341         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetDeviceGammaRamp );
1342         ret = physdev->funcs->pSetDeviceGammaRamp( physdev, ptr );
1343         release_dc_ptr( dc );
1344     }
1345     return ret;
1346 }
1347
1348 /***********************************************************************
1349  *           GetColorSpace    (GDI32.@)
1350  */
1351 HCOLORSPACE WINAPI GetColorSpace(HDC hdc)
1352 {
1353 /*FIXME    Need to to whatever GetColorSpace actually does */
1354     return 0;
1355 }
1356
1357 /***********************************************************************
1358  *           CreateColorSpaceA    (GDI32.@)
1359  */
1360 HCOLORSPACE WINAPI CreateColorSpaceA( LPLOGCOLORSPACEA lpLogColorSpace )
1361 {
1362   FIXME( "stub\n" );
1363   return 0;
1364 }
1365
1366 /***********************************************************************
1367  *           CreateColorSpaceW    (GDI32.@)
1368  */
1369 HCOLORSPACE WINAPI CreateColorSpaceW( LPLOGCOLORSPACEW lpLogColorSpace )
1370 {
1371   FIXME( "stub\n" );
1372   return 0;
1373 }
1374
1375 /***********************************************************************
1376  *           DeleteColorSpace     (GDI32.@)
1377  */
1378 BOOL WINAPI DeleteColorSpace( HCOLORSPACE hColorSpace )
1379 {
1380   FIXME( "stub\n" );
1381
1382   return TRUE;
1383 }
1384
1385 /***********************************************************************
1386  *           SetColorSpace     (GDI32.@)
1387  */
1388 HCOLORSPACE WINAPI SetColorSpace( HDC hDC, HCOLORSPACE hColorSpace )
1389 {
1390   FIXME( "stub\n" );
1391
1392   return hColorSpace;
1393 }
1394
1395 /***********************************************************************
1396  *           GetBoundsRect    (GDI32.@)
1397  */
1398 UINT WINAPI GetBoundsRect(HDC hdc, LPRECT rect, UINT flags)
1399 {
1400     UINT ret;
1401     DC *dc = get_dc_ptr( hdc );
1402
1403     if ( !dc ) return 0;
1404
1405     if (rect)
1406     {
1407         *rect = dc->BoundsRect;
1408         ret = ((dc->flags & DC_BOUNDS_SET) ? DCB_SET : DCB_RESET);
1409     }
1410     else
1411         ret = 0;
1412
1413     if (flags & DCB_RESET)
1414     {
1415         dc->BoundsRect.left   = 0;
1416         dc->BoundsRect.top    = 0;
1417         dc->BoundsRect.right  = 0;
1418         dc->BoundsRect.bottom = 0;
1419         dc->flags &= ~DC_BOUNDS_SET;
1420     }
1421     release_dc_ptr( dc );
1422     return ret;
1423 }
1424
1425
1426 /***********************************************************************
1427  *           SetBoundsRect    (GDI32.@)
1428  */
1429 UINT WINAPI SetBoundsRect(HDC hdc, const RECT* rect, UINT flags)
1430 {
1431     UINT ret;
1432     DC *dc;
1433
1434     if ((flags & DCB_ENABLE) && (flags & DCB_DISABLE)) return 0;
1435     if (!(dc = get_dc_ptr( hdc ))) return 0;
1436
1437     ret = ((dc->flags & DC_BOUNDS_ENABLE) ? DCB_ENABLE : DCB_DISABLE) |
1438           ((dc->flags & DC_BOUNDS_SET) ? DCB_SET : DCB_RESET);
1439
1440     if (flags & DCB_RESET)
1441     {
1442         dc->BoundsRect.left   = 0;
1443         dc->BoundsRect.top    = 0;
1444         dc->BoundsRect.right  = 0;
1445         dc->BoundsRect.bottom = 0;
1446         dc->flags &= ~DC_BOUNDS_SET;
1447     }
1448
1449     if ((flags & DCB_ACCUMULATE) && rect && rect->left < rect->right && rect->top < rect->bottom)
1450     {
1451         if (dc->flags & DC_BOUNDS_SET)
1452         {
1453             dc->BoundsRect.left   = min( dc->BoundsRect.left, rect->left );
1454             dc->BoundsRect.top    = min( dc->BoundsRect.top, rect->top );
1455             dc->BoundsRect.right  = max( dc->BoundsRect.right, rect->right );
1456             dc->BoundsRect.bottom = max( dc->BoundsRect.bottom, rect->bottom );
1457         }
1458         else
1459         {
1460             dc->BoundsRect = *rect;
1461             dc->flags |= DC_BOUNDS_SET;
1462         }
1463     }
1464
1465     if (flags & DCB_ENABLE) dc->flags |= DC_BOUNDS_ENABLE;
1466     if (flags & DCB_DISABLE) dc->flags &= ~DC_BOUNDS_ENABLE;
1467
1468     release_dc_ptr( dc );
1469     return ret;
1470 }
1471
1472
1473 /***********************************************************************
1474  *              GetRelAbs               (GDI32.@)
1475  */
1476 INT WINAPI GetRelAbs( HDC hdc, DWORD dwIgnore )
1477 {
1478     INT ret = 0;
1479     DC *dc = get_dc_ptr( hdc );
1480     if (dc)
1481     {
1482         ret = dc->relAbsMode;
1483         release_dc_ptr( dc );
1484     }
1485     return ret;
1486 }
1487
1488
1489
1490
1491 /***********************************************************************
1492  *              GetBkMode (GDI32.@)
1493  */
1494 INT WINAPI GetBkMode( HDC hdc )
1495 {
1496     INT ret = 0;
1497     DC * dc = get_dc_ptr( hdc );
1498     if (dc)
1499     {
1500         ret = dc->backgroundMode;
1501         release_dc_ptr( dc );
1502     }
1503     return ret;
1504 }
1505
1506
1507 /***********************************************************************
1508  *              SetBkMode (GDI32.@)
1509  */
1510 INT WINAPI SetBkMode( HDC hdc, INT mode )
1511 {
1512     INT ret = 0;
1513     DC *dc;
1514
1515     if ((mode <= 0) || (mode > BKMODE_LAST))
1516     {
1517         SetLastError(ERROR_INVALID_PARAMETER);
1518         return 0;
1519     }
1520     if ((dc = get_dc_ptr( hdc )))
1521     {
1522         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetBkMode );
1523         mode = physdev->funcs->pSetBkMode( physdev, mode );
1524         if (mode)
1525         {
1526             ret = dc->backgroundMode;
1527             dc->backgroundMode = mode;
1528         }
1529         release_dc_ptr( dc );
1530     }
1531     return ret;
1532 }
1533
1534
1535 /***********************************************************************
1536  *              GetROP2 (GDI32.@)
1537  */
1538 INT WINAPI GetROP2( HDC hdc )
1539 {
1540     INT ret = 0;
1541     DC * dc = get_dc_ptr( hdc );
1542     if (dc)
1543     {
1544         ret = dc->ROPmode;
1545         release_dc_ptr( dc );
1546     }
1547     return ret;
1548 }
1549
1550
1551 /***********************************************************************
1552  *              SetROP2 (GDI32.@)
1553  */
1554 INT WINAPI SetROP2( HDC hdc, INT mode )
1555 {
1556     INT ret = 0;
1557     DC *dc;
1558
1559     if ((mode < R2_BLACK) || (mode > R2_WHITE))
1560     {
1561         SetLastError(ERROR_INVALID_PARAMETER);
1562         return 0;
1563     }
1564     if ((dc = get_dc_ptr( hdc )))
1565     {
1566         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetROP2 );
1567         mode = physdev->funcs->pSetROP2( physdev, mode );
1568         if (mode)
1569         {
1570             ret = dc->ROPmode;
1571             dc->ROPmode = mode;
1572         }
1573         release_dc_ptr( dc );
1574     }
1575     return ret;
1576 }
1577
1578
1579 /***********************************************************************
1580  *              SetRelAbs (GDI32.@)
1581  */
1582 INT WINAPI SetRelAbs( HDC hdc, INT mode )
1583 {
1584     INT ret = 0;
1585     DC *dc;
1586
1587     if ((mode != ABSOLUTE) && (mode != RELATIVE))
1588     {
1589         SetLastError(ERROR_INVALID_PARAMETER);
1590         return 0;
1591     }
1592     if ((dc = get_dc_ptr( hdc )))
1593     {
1594         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetRelAbs );
1595         mode = physdev->funcs->pSetRelAbs( physdev, mode );
1596         if (mode)
1597         {
1598             ret = dc->relAbsMode;
1599             dc->relAbsMode = mode;
1600         }
1601         release_dc_ptr( dc );
1602     }
1603     return ret;
1604 }
1605
1606
1607 /***********************************************************************
1608  *              GetPolyFillMode (GDI32.@)
1609  */
1610 INT WINAPI GetPolyFillMode( HDC hdc )
1611 {
1612     INT ret = 0;
1613     DC * dc = get_dc_ptr( hdc );
1614     if (dc)
1615     {
1616         ret = dc->polyFillMode;
1617         release_dc_ptr( dc );
1618     }
1619     return ret;
1620 }
1621
1622
1623 /***********************************************************************
1624  *              SetPolyFillMode (GDI32.@)
1625  */
1626 INT WINAPI SetPolyFillMode( HDC hdc, INT mode )
1627 {
1628     INT ret = 0;
1629     DC *dc;
1630
1631     if ((mode <= 0) || (mode > POLYFILL_LAST))
1632     {
1633         SetLastError(ERROR_INVALID_PARAMETER);
1634         return 0;
1635     }
1636     if ((dc = get_dc_ptr( hdc )))
1637     {
1638         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetPolyFillMode );
1639         mode = physdev->funcs->pSetPolyFillMode( physdev, mode );
1640         if (mode)
1641         {
1642             ret = dc->polyFillMode;
1643             dc->polyFillMode = mode;
1644         }
1645         release_dc_ptr( dc );
1646     }
1647     return ret;
1648 }
1649
1650
1651 /***********************************************************************
1652  *              GetStretchBltMode (GDI32.@)
1653  */
1654 INT WINAPI GetStretchBltMode( HDC hdc )
1655 {
1656     INT ret = 0;
1657     DC * dc = get_dc_ptr( hdc );
1658     if (dc)
1659     {
1660         ret = dc->stretchBltMode;
1661         release_dc_ptr( dc );
1662     }
1663     return ret;
1664 }
1665
1666
1667 /***********************************************************************
1668  *              SetStretchBltMode (GDI32.@)
1669  */
1670 INT WINAPI SetStretchBltMode( HDC hdc, INT mode )
1671 {
1672     INT ret = 0;
1673     DC *dc;
1674
1675     if ((mode <= 0) || (mode > MAXSTRETCHBLTMODE))
1676     {
1677         SetLastError(ERROR_INVALID_PARAMETER);
1678         return 0;
1679     }
1680     if ((dc = get_dc_ptr( hdc )))
1681     {
1682         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetStretchBltMode );
1683         mode = physdev->funcs->pSetStretchBltMode( physdev, mode );
1684         if (mode)
1685         {
1686             ret = dc->stretchBltMode;
1687             dc->stretchBltMode = mode;
1688         }
1689         release_dc_ptr( dc );
1690     }
1691     return ret;
1692 }
1693
1694
1695 /***********************************************************************
1696  *              GetMapMode (GDI32.@)
1697  */
1698 INT WINAPI GetMapMode( HDC hdc )
1699 {
1700     INT ret = 0;
1701     DC * dc = get_dc_ptr( hdc );
1702     if (dc)
1703     {
1704         ret = dc->MapMode;
1705         release_dc_ptr( dc );
1706     }
1707     return ret;
1708 }
1709
1710
1711 /***********************************************************************
1712  *              GetBrushOrgEx (GDI32.@)
1713  */
1714 BOOL WINAPI GetBrushOrgEx( HDC hdc, LPPOINT pt )
1715 {
1716     DC * dc = get_dc_ptr( hdc );
1717     if (!dc) return FALSE;
1718     pt->x = dc->brushOrgX;
1719     pt->y = dc->brushOrgY;
1720     release_dc_ptr( dc );
1721     return TRUE;
1722 }
1723
1724
1725 /***********************************************************************
1726  *              GetCurrentPositionEx (GDI32.@)
1727  */
1728 BOOL WINAPI GetCurrentPositionEx( HDC hdc, LPPOINT pt )
1729 {
1730     DC * dc = get_dc_ptr( hdc );
1731     if (!dc) return FALSE;
1732     pt->x = dc->CursPosX;
1733     pt->y = dc->CursPosY;
1734     release_dc_ptr( dc );
1735     return TRUE;
1736 }
1737
1738
1739 /***********************************************************************
1740  *              GetViewportExtEx (GDI32.@)
1741  */
1742 BOOL WINAPI GetViewportExtEx( HDC hdc, LPSIZE size )
1743 {
1744     DC * dc = get_dc_ptr( hdc );
1745     if (!dc) return FALSE;
1746     size->cx = dc->vportExtX;
1747     size->cy = dc->vportExtY;
1748     release_dc_ptr( dc );
1749     return TRUE;
1750 }
1751
1752
1753 /***********************************************************************
1754  *              GetViewportOrgEx (GDI32.@)
1755  */
1756 BOOL WINAPI GetViewportOrgEx( HDC hdc, LPPOINT pt )
1757 {
1758     DC * dc = get_dc_ptr( hdc );
1759     if (!dc) return FALSE;
1760     pt->x = dc->vportOrgX;
1761     pt->y = dc->vportOrgY;
1762     release_dc_ptr( dc );
1763     return TRUE;
1764 }
1765
1766
1767 /***********************************************************************
1768  *              GetWindowExtEx (GDI32.@)
1769  */
1770 BOOL WINAPI GetWindowExtEx( HDC hdc, LPSIZE size )
1771 {
1772     DC * dc = get_dc_ptr( hdc );
1773     if (!dc) return FALSE;
1774     size->cx = dc->wndExtX;
1775     size->cy = dc->wndExtY;
1776     release_dc_ptr( dc );
1777     return TRUE;
1778 }
1779
1780
1781 /***********************************************************************
1782  *              GetWindowOrgEx (GDI32.@)
1783  */
1784 BOOL WINAPI GetWindowOrgEx( HDC hdc, LPPOINT pt )
1785 {
1786     DC * dc = get_dc_ptr( hdc );
1787     if (!dc) return FALSE;
1788     pt->x = dc->wndOrgX;
1789     pt->y = dc->wndOrgY;
1790     release_dc_ptr( dc );
1791     return TRUE;
1792 }
1793
1794
1795 /***********************************************************************
1796  *           GetLayout    (GDI32.@)
1797  *
1798  * Gets left->right or right->left text layout flags of a dc.
1799  *
1800  */
1801 DWORD WINAPI GetLayout(HDC hdc)
1802 {
1803     DWORD layout = GDI_ERROR;
1804
1805     DC * dc = get_dc_ptr( hdc );
1806     if (dc)
1807     {
1808         layout = dc->layout;
1809         release_dc_ptr( dc );
1810     }
1811
1812     TRACE("hdc : %p, layout : %08x\n", hdc, layout);
1813
1814     return layout;
1815 }
1816
1817 /***********************************************************************
1818  *           SetLayout    (GDI32.@)
1819  *
1820  * Sets left->right or right->left text layout flags of a dc.
1821  *
1822  */
1823 DWORD WINAPI SetLayout(HDC hdc, DWORD layout)
1824 {
1825     DWORD oldlayout = GDI_ERROR;
1826
1827     DC * dc = get_dc_ptr( hdc );
1828     if (dc)
1829     {
1830         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetLayout );
1831         layout = physdev->funcs->pSetLayout( physdev, layout );
1832         if (layout != GDI_ERROR)
1833         {
1834             oldlayout = dc->layout;
1835             dc->layout = layout;
1836             if (layout != oldlayout)
1837             {
1838                 if (layout & LAYOUT_RTL) dc->MapMode = MM_ANISOTROPIC;
1839                 DC_UpdateXforms( dc );
1840             }
1841         }
1842         release_dc_ptr( dc );
1843     }
1844
1845     TRACE("hdc : %p, old layout : %08x, new layout : %08x\n", hdc, oldlayout, layout);
1846
1847     return oldlayout;
1848 }
1849
1850 /***********************************************************************
1851  *           GetDCBrushColor    (GDI32.@)
1852  */
1853 COLORREF WINAPI GetDCBrushColor(HDC hdc)
1854 {
1855     DC *dc;
1856     COLORREF dcBrushColor = CLR_INVALID;
1857
1858     TRACE("hdc(%p)\n", hdc);
1859
1860     dc = get_dc_ptr( hdc );
1861     if (dc)
1862     {
1863         dcBrushColor = dc->dcBrushColor;
1864         release_dc_ptr( dc );
1865     }
1866
1867     return dcBrushColor;
1868 }
1869
1870 /***********************************************************************
1871  *           SetDCBrushColor    (GDI32.@)
1872  */
1873 COLORREF WINAPI SetDCBrushColor(HDC hdc, COLORREF crColor)
1874 {
1875     DC *dc;
1876     COLORREF oldClr = CLR_INVALID;
1877
1878     TRACE("hdc(%p) crColor(%08x)\n", hdc, crColor);
1879
1880     dc = get_dc_ptr( hdc );
1881     if (dc)
1882     {
1883         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetDCBrushColor );
1884         crColor = physdev->funcs->pSetDCBrushColor( physdev, crColor );
1885         if (crColor != CLR_INVALID)
1886         {
1887             oldClr = dc->dcBrushColor;
1888             dc->dcBrushColor = crColor;
1889         }
1890         release_dc_ptr( dc );
1891     }
1892
1893     return oldClr;
1894 }
1895
1896 /***********************************************************************
1897  *           GetDCPenColor    (GDI32.@)
1898  */
1899 COLORREF WINAPI GetDCPenColor(HDC hdc)
1900 {
1901     DC *dc;
1902     COLORREF dcPenColor = CLR_INVALID;
1903
1904     TRACE("hdc(%p)\n", hdc);
1905
1906     dc = get_dc_ptr( hdc );
1907     if (dc)
1908     {
1909         dcPenColor = dc->dcPenColor;
1910         release_dc_ptr( dc );
1911     }
1912
1913     return dcPenColor;
1914 }
1915
1916 /***********************************************************************
1917  *           SetDCPenColor    (GDI32.@)
1918  */
1919 COLORREF WINAPI SetDCPenColor(HDC hdc, COLORREF crColor)
1920 {
1921     DC *dc;
1922     COLORREF oldClr = CLR_INVALID;
1923
1924     TRACE("hdc(%p) crColor(%08x)\n", hdc, crColor);
1925
1926     dc = get_dc_ptr( hdc );
1927     if (dc)
1928     {
1929         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetDCPenColor );
1930         crColor = physdev->funcs->pSetDCPenColor( physdev, crColor );
1931         if (crColor != CLR_INVALID)
1932         {
1933             oldClr = dc->dcPenColor;
1934             dc->dcPenColor = crColor;
1935         }
1936         release_dc_ptr( dc );
1937     }
1938
1939     return oldClr;
1940 }
1941
1942 /***********************************************************************
1943  *           CancelDC    (GDI32.@)
1944  */
1945 BOOL WINAPI CancelDC(HDC hdc)
1946 {
1947     FIXME("stub\n");
1948     return TRUE;
1949 }
1950
1951 /*******************************************************************
1952  *      GetMiterLimit [GDI32.@]
1953  *
1954  *
1955  */
1956 BOOL WINAPI GetMiterLimit(HDC hdc, PFLOAT peLimit)
1957 {
1958     BOOL bRet = FALSE;
1959     DC *dc;
1960
1961     TRACE("(%p,%p)\n", hdc, peLimit);
1962
1963     dc = get_dc_ptr( hdc );
1964     if (dc)
1965     {
1966         if (peLimit)
1967             *peLimit = dc->miterLimit;
1968
1969         release_dc_ptr( dc );
1970         bRet = TRUE;
1971     }
1972     return bRet;
1973 }
1974
1975 /*******************************************************************
1976  *      SetMiterLimit [GDI32.@]
1977  *
1978  *
1979  */
1980 BOOL WINAPI SetMiterLimit(HDC hdc, FLOAT eNewLimit, PFLOAT peOldLimit)
1981 {
1982     BOOL bRet = FALSE;
1983     DC *dc;
1984
1985     TRACE("(%p,%f,%p)\n", hdc, eNewLimit, peOldLimit);
1986
1987     dc = get_dc_ptr( hdc );
1988     if (dc)
1989     {
1990         if (peOldLimit)
1991             *peOldLimit = dc->miterLimit;
1992         dc->miterLimit = eNewLimit;
1993         release_dc_ptr( dc );
1994         bRet = TRUE;
1995     }
1996     return bRet;
1997 }
1998
1999 /*******************************************************************
2000  *      GdiIsMetaPrintDC [GDI32.@]
2001  */
2002 BOOL WINAPI GdiIsMetaPrintDC(HDC hdc)
2003 {
2004     FIXME("%p\n", hdc);
2005     return FALSE;
2006 }
2007
2008 /*******************************************************************
2009  *      GdiIsMetaFileDC [GDI32.@]
2010  */
2011 BOOL WINAPI GdiIsMetaFileDC(HDC hdc)
2012 {
2013     TRACE("%p\n", hdc);
2014
2015     switch( GetObjectType( hdc ) )
2016     {
2017     case OBJ_METADC:
2018     case OBJ_ENHMETADC:
2019         return TRUE;
2020     }
2021     return FALSE;
2022 }
2023
2024 /*******************************************************************
2025  *      GdiIsPlayMetafileDC [GDI32.@]
2026  */
2027 BOOL WINAPI GdiIsPlayMetafileDC(HDC hdc)
2028 {
2029     FIXME("%p\n", hdc);
2030     return FALSE;
2031 }