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 "wownt32.h"
  34 #include "gdi_private.h"
  35 #include "wine/unicode.h"
  36 #include "wine/debug.h"
  37
  38 WINE_DEFAULT_DEBUG_CHANNEL(dc);
  39
  40 static const WCHAR displayW[] = { 'd','i','s','p','l','a','y',0 };
  41
  42 static BOOL DC_DeleteObject( HGDIOBJ handle );
  43
  44 static const struct gdi_obj_funcs dc_funcs =
  45 {
  46     NULL,             /* pSelectObject */
  47     NULL,             /* pGetObjectA */
  48     NULL,             /* pGetObjectW */
  49     NULL,             /* pUnrealizeObject */
  50     DC_DeleteObject   /* pDeleteObject */
  51 };
  52
  53
  54 static inline DC *get_dc_obj( HDC hdc )
  55 {
  56     DC *dc = GDI_GetObjPtr( hdc, 0 );
  57     if (!dc) return NULL;
  58
  59     if ((dc->header.type != OBJ_DC) &&
  60         (dc->header.type != OBJ_MEMDC) &&
  61         (dc->header.type != OBJ_METADC) &&
  62         (dc->header.type != OBJ_ENHMETADC))
  63     {
  64         GDI_ReleaseObj( hdc );
  65         SetLastError( ERROR_INVALID_HANDLE );
  66         dc = NULL;
  67     }
  68     return dc;
  69 }
  70
  71
  72 /***********************************************************************
  73  *           alloc_dc_ptr
  74  */
  75 DC *alloc_dc_ptr( const DC_FUNCTIONS *funcs, WORD magic )
  76 {
  77     DC *dc;
  78
  79     if (!(dc = HeapAlloc( GetProcessHeap(), 0, sizeof(*dc) ))) return NULL;
  80
  81     dc->funcs               = funcs;
  82     dc->physDev             = NULL;
  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->hookThunk           = NULL;
  91     dc->wndOrgX             = 0;
  92     dc->wndOrgY             = 0;
  93     dc->wndExtX             = 1;
  94     dc->wndExtY             = 1;
  95     dc->vportOrgX           = 0;
  96     dc->vportOrgY           = 0;
  97     dc->vportExtX           = 1;
  98     dc->vportExtY           = 1;
  99     dc->miterLimit          = 10.0f; /* 10.0 is the default, from MSDN */
 100     dc->flags               = 0;
 101     dc->layout              = 0;
 102     dc->hClipRgn            = 0;
 103     dc->hMetaRgn            = 0;
 104     dc->hMetaClipRgn        = 0;
 105     dc->hVisRgn             = 0;
 106     dc->hPen                = GetStockObject( BLACK_PEN );
 107     dc->hBrush              = GetStockObject( WHITE_BRUSH );
 108     dc->hFont               = GetStockObject( SYSTEM_FONT );
 109     dc->hBitmap             = 0;
 110     dc->hDevice             = 0;
 111     dc->hPalette            = GetStockObject( DEFAULT_PALETTE );
 112     dc->gdiFont             = 0;
 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->textAlign           = TA_LEFT | TA_TOP | TA_NOUPDATECP;
 125     dc->charExtra           = 0;
 126     dc->breakExtra          = 0;
 127     dc->breakRem            = 0;
 128     dc->MapMode             = MM_TEXT;
 129     dc->GraphicsMode        = GM_COMPATIBLE;
 130     dc->pAbortProc          = NULL;
 131     dc->CursPosX            = 0;
 132     dc->CursPosY            = 0;
 133     dc->ArcDirection        = AD_COUNTERCLOCKWISE;
 134     dc->xformWorld2Wnd.eM11 = 1.0f;
 135     dc->xformWorld2Wnd.eM12 = 0.0f;
 136     dc->xformWorld2Wnd.eM21 = 0.0f;
 137     dc->xformWorld2Wnd.eM22 = 1.0f;
 138     dc->xformWorld2Wnd.eDx  = 0.0f;
 139     dc->xformWorld2Wnd.eDy  = 0.0f;
 140     dc->xformWorld2Vport    = dc->xformWorld2Wnd;
 141     dc->xformVport2World    = dc->xformWorld2Wnd;
 142     dc->vport2WorldValid    = TRUE;
 143     dc->BoundsRect.left     = 0;
 144     dc->BoundsRect.top      = 0;
 145     dc->BoundsRect.right    = 0;
 146     dc->BoundsRect.bottom   = 0;
 147     dc->saved_visrgn        = NULL;
 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         dc = NULL;
 154     }
 155     return dc;
 156 }
 157
 158
 159
 160 /***********************************************************************
 161  *           free_dc_ptr
 162  */
 163 BOOL free_dc_ptr( DC *dc )
 164 {
 165     assert( dc->refcount == 1 );
 166     if (free_gdi_handle( dc->hSelf ) != dc) return FALSE;  /* shouldn't happen */
 167     return HeapFree( GetProcessHeap(), 0, dc );
 168 }
 169
 170
 171 /***********************************************************************
 172  *           get_dc_ptr
 173  *
 174  * Retrieve a DC pointer but release the GDI lock.
 175  */
 176 DC *get_dc_ptr( HDC hdc )
 177 {
 178     DC *dc = get_dc_obj( hdc );
 179     if (!dc) return NULL;
 180
 181     if (!InterlockedCompareExchange( &dc->refcount, 1, 0 ))
 182     {
 183         dc->thread = GetCurrentThreadId();
 184     }
 185     else if (dc->thread != GetCurrentThreadId())
 186     {
 187         WARN( "dc %p belongs to thread %04x\n", hdc, dc->thread );
 188         GDI_ReleaseObj( hdc );
 189         return NULL;
 190     }
 191     else InterlockedIncrement( &dc->refcount );
 192
 193     GDI_ReleaseObj( hdc );
 194     return dc;
 195 }
 196
 197
 198 /***********************************************************************
 199  *           release_dc_ptr
 200  */
 201 void release_dc_ptr( DC *dc )
 202 {
 203     LONG ref;
 204
 205     dc->thread = 0;
 206     ref = InterlockedDecrement( &dc->refcount );
 207     assert( ref >= 0 );
 208     if (ref) dc->thread = GetCurrentThreadId();  /* we still own it */
 209 }
 210
 211
 212 /***********************************************************************
 213  *           update_dc
 214  *
 215  * Make sure the DC vis region is up to date.
 216  * This function may call up to USER so the GDI lock should _not_
 217  * be held when calling it.
 218  */
 219 void update_dc( DC *dc )
 220 {
 221     if (InterlockedExchange( &dc->dirty, 0 ) && dc->hookThunk)
 222         dc->hookThunk( dc->hSelf, DCHC_INVALIDVISRGN, dc->dwHookData, 0 );
 223 }
 224
 225
 226 /***********************************************************************
 227  *           DC_DeleteObject
 228  */
 229 static BOOL DC_DeleteObject( HGDIOBJ handle )
 230 {
 231     return DeleteDC( handle );
 232 }
 233
 234
 235 /***********************************************************************
 236  *           DC_InitDC
 237  *
 238  * Setup device-specific DC values for a newly created DC.
 239  */
 240 void DC_InitDC( DC* dc )
 241 {
 242     if (dc->funcs->pRealizeDefaultPalette) dc->funcs->pRealizeDefaultPalette( dc->physDev );
 243     SetTextColor( dc->hSelf, dc->textColor );
 244     SetBkColor( dc->hSelf, dc->backgroundColor );
 245     SelectObject( dc->hSelf, dc->hPen );
 246     SelectObject( dc->hSelf, dc->hBrush );
 247     SelectObject( dc->hSelf, dc->hFont );
 248     CLIPPING_UpdateGCRegion( dc );
 249 }
 250
 251
 252 /***********************************************************************
 253  *           DC_InvertXform
 254  *
 255  * Computes the inverse of the transformation xformSrc and stores it to
 256  * xformDest. Returns TRUE if successful or FALSE if the xformSrc matrix
 257  * is singular.
 258  */
 259 static BOOL DC_InvertXform( const XFORM *xformSrc, XFORM *xformDest )
 260 {
 261     double determinant;
 262
 263     determinant = xformSrc->eM11*xformSrc->eM22 -
 264         xformSrc->eM12*xformSrc->eM21;
 265     if (determinant > -1e-12 && determinant < 1e-12)
 266         return FALSE;
 267
 268     xformDest->eM11 =  xformSrc->eM22 / determinant;
 269     xformDest->eM12 = -xformSrc->eM12 / determinant;
 270     xformDest->eM21 = -xformSrc->eM21 / determinant;
 271     xformDest->eM22 =  xformSrc->eM11 / determinant;
 272     xformDest->eDx  = -xformSrc->eDx * xformDest->eM11 -
 273                        xformSrc->eDy * xformDest->eM21;
 274     xformDest->eDy  = -xformSrc->eDx * xformDest->eM12 -
 275                        xformSrc->eDy * xformDest->eM22;
 276
 277     return TRUE;
 278 }
 279
 280
 281 /***********************************************************************
 282  *           DC_UpdateXforms
 283  *
 284  * Updates the xformWorld2Vport, xformVport2World and vport2WorldValid
 285  * fields of the specified DC by creating a transformation that
 286  * represents the current mapping mode and combining it with the DC's
 287  * world transform. This function should be called whenever the
 288  * parameters associated with the mapping mode (window and viewport
 289  * extents and origins) or the world transform change.
 290  */
 291 void DC_UpdateXforms( DC *dc )
 292 {
 293     XFORM xformWnd2Vport, oldworld2vport;
 294     double scaleX, scaleY;
 295
 296     /* Construct a transformation to do the window-to-viewport conversion */
 297     scaleX = (double)dc->vportExtX / (double)dc->wndExtX;
 298     scaleY = (double)dc->vportExtY / (double)dc->wndExtY;
 299     xformWnd2Vport.eM11 = scaleX;
 300     xformWnd2Vport.eM12 = 0.0;
 301     xformWnd2Vport.eM21 = 0.0;
 302     xformWnd2Vport.eM22 = scaleY;
 303     xformWnd2Vport.eDx  = (double)dc->vportOrgX -
 304         scaleX * (double)dc->wndOrgX;
 305     xformWnd2Vport.eDy  = (double)dc->vportOrgY -
 306         scaleY * (double)dc->wndOrgY;
 307
 308     oldworld2vport = dc->xformWorld2Vport;
 309     /* Combine with the world transformation */
 310     CombineTransform( &dc->xformWorld2Vport, &dc->xformWorld2Wnd,
 311         &xformWnd2Vport );
 312
 313     /* Create inverse of world-to-viewport transformation */
 314     dc->vport2WorldValid = DC_InvertXform( &dc->xformWorld2Vport,
 315         &dc->xformVport2World );
 316
 317     /* Reselect the font and pen back into the dc so that the size
 318        gets updated. */
 319     if (memcmp(&oldworld2vport, &dc->xformWorld2Vport, sizeof(oldworld2vport)) &&
 320         !GdiIsMetaFileDC(dc->hSelf))
 321     {
 322         SelectObject(dc->hSelf, GetCurrentObject(dc->hSelf, OBJ_FONT));
 323         SelectObject(dc->hSelf, GetCurrentObject(dc->hSelf, OBJ_PEN));
 324     }
 325 }
 326
 327
 328 /***********************************************************************
 329  *           GetDCState   (Not a Windows API)
 330  */
 331 static HDC GetDCState( HDC hdc )
 332 {
 333     DC * newdc, * dc;
 334     HGDIOBJ handle;
 335
 336     if (!(dc = get_dc_ptr( hdc ))) return 0;
 337     if (!(newdc = HeapAlloc( GetProcessHeap(), 0, sizeof(*newdc ))))
 338     {
 339       release_dc_ptr( dc );
 340       return 0;
 341     }
 342
 343     newdc->flags            = dc->flags | DC_SAVED;
 344     newdc->layout           = dc->layout;
 345     newdc->hPen             = dc->hPen;
 346     newdc->hBrush           = dc->hBrush;
 347     newdc->hFont            = dc->hFont;
 348     newdc->hBitmap          = dc->hBitmap;
 349     newdc->hDevice          = dc->hDevice;
 350     newdc->hPalette         = dc->hPalette;
 351     newdc->ROPmode          = dc->ROPmode;
 352     newdc->polyFillMode     = dc->polyFillMode;
 353     newdc->stretchBltMode   = dc->stretchBltMode;
 354     newdc->relAbsMode       = dc->relAbsMode;
 355     newdc->backgroundMode   = dc->backgroundMode;
 356     newdc->backgroundColor  = dc->backgroundColor;
 357     newdc->textColor        = dc->textColor;
 358     newdc->dcBrushColor     = dc->dcBrushColor;
 359     newdc->dcPenColor       = dc->dcPenColor;
 360     newdc->brushOrgX        = dc->brushOrgX;
 361     newdc->brushOrgY        = dc->brushOrgY;
 362     newdc->textAlign        = dc->textAlign;
 363     newdc->charExtra        = dc->charExtra;
 364     newdc->breakExtra       = dc->breakExtra;
 365     newdc->breakRem         = dc->breakRem;
 366     newdc->MapMode          = dc->MapMode;
 367     newdc->GraphicsMode     = dc->GraphicsMode;
 368     newdc->CursPosX         = dc->CursPosX;
 369     newdc->CursPosY         = dc->CursPosY;
 370     newdc->ArcDirection     = dc->ArcDirection;
 371     newdc->xformWorld2Wnd   = dc->xformWorld2Wnd;
 372     newdc->xformWorld2Vport = dc->xformWorld2Vport;
 373     newdc->xformVport2World = dc->xformVport2World;
 374     newdc->vport2WorldValid = dc->vport2WorldValid;
 375     newdc->wndOrgX          = dc->wndOrgX;
 376     newdc->wndOrgY          = dc->wndOrgY;
 377     newdc->wndExtX          = dc->wndExtX;
 378     newdc->wndExtY          = dc->wndExtY;
 379     newdc->vportOrgX        = dc->vportOrgX;
 380     newdc->vportOrgY        = dc->vportOrgY;
 381     newdc->vportExtX        = dc->vportExtX;
 382     newdc->vportExtY        = dc->vportExtY;
 383     newdc->BoundsRect       = dc->BoundsRect;
 384     newdc->gdiFont          = dc->gdiFont;
 385
 386     newdc->thread    = GetCurrentThreadId();
 387     newdc->refcount  = 1;
 388     newdc->saveLevel = 0;
 389     newdc->saved_dc  = 0;
 390
 391     PATH_InitGdiPath( &newdc->path );
 392
 393     newdc->pAbortProc = NULL;
 394     newdc->hookThunk  = NULL;
 395     newdc->hookProc   = 0;
 396     newdc->saved_visrgn = NULL;
 397
 398     if (!(newdc->hSelf = alloc_gdi_handle( &newdc->header, dc->header.type, &dc_funcs )))
 399     {
 400         HeapFree( GetProcessHeap(), 0, newdc );
 401         release_dc_ptr( dc );
 402         return 0;
 403     }
 404     handle = newdc->hSelf;
 405     TRACE("(%p): returning %p\n", hdc, handle );
 406
 407     /* Get/SetDCState() don't change hVisRgn field ("Undoc. Windows" p.559). */
 408
 409     newdc->hVisRgn      = 0;
 410     newdc->hClipRgn     = 0;
 411     newdc->hMetaRgn     = 0;
 412     newdc->hMetaClipRgn = 0;
 413     if (dc->hClipRgn)
 414     {
 415         newdc->hClipRgn = CreateRectRgn( 0, 0, 0, 0 );
 416         CombineRgn( newdc->hClipRgn, dc->hClipRgn, 0, RGN_COPY );
 417     }
 418     if (dc->hMetaRgn)
 419     {
 420         newdc->hMetaRgn = CreateRectRgn( 0, 0, 0, 0 );
 421         CombineRgn( newdc->hMetaRgn, dc->hMetaRgn, 0, RGN_COPY );
 422     }
 423     /* don't bother recomputing hMetaClipRgn, we'll do that in SetDCState */
 424
 425     release_dc_ptr( newdc );
 426     release_dc_ptr( dc );
 427     return handle;
 428 }
 429
 430
 431 /***********************************************************************
 432  *           SetDCState   (Not a Windows API)
 433  */
 434 static void SetDCState( HDC hdc, HDC hdcs )
 435 {
 436     DC *dc, *dcs;
 437
 438     if (!(dc = get_dc_ptr( hdc ))) return;
 439     if (!(dcs = get_dc_ptr( hdcs )))
 440     {
 441         release_dc_ptr( dc );
 442         return;
 443     }
 444     if (!(dcs->flags & DC_SAVED))
 445     {
 446         release_dc_ptr( dc );
 447         release_dc_ptr( dcs );
 448         return;
 449     }
 450     TRACE("%p %p\n", hdc, hdcs );
 451
 452     update_dc( dc );
 453     dc->flags            = dcs->flags & ~DC_SAVED;
 454     dc->layout           = dcs->layout;
 455     dc->hDevice          = dcs->hDevice;
 456     dc->ROPmode          = dcs->ROPmode;
 457     dc->polyFillMode     = dcs->polyFillMode;
 458     dc->stretchBltMode   = dcs->stretchBltMode;
 459     dc->relAbsMode       = dcs->relAbsMode;
 460     dc->backgroundMode   = dcs->backgroundMode;
 461     dc->backgroundColor  = dcs->backgroundColor;
 462     dc->textColor        = dcs->textColor;
 463     dc->dcBrushColor     = dcs->dcBrushColor;
 464     dc->dcPenColor       = dcs->dcPenColor;
 465     dc->brushOrgX        = dcs->brushOrgX;
 466     dc->brushOrgY        = dcs->brushOrgY;
 467     dc->textAlign        = dcs->textAlign;
 468     dc->charExtra        = dcs->charExtra;
 469     dc->breakExtra       = dcs->breakExtra;
 470     dc->breakRem         = dcs->breakRem;
 471     dc->MapMode          = dcs->MapMode;
 472     dc->GraphicsMode     = dcs->GraphicsMode;
 473     dc->CursPosX         = dcs->CursPosX;
 474     dc->CursPosY         = dcs->CursPosY;
 475     dc->ArcDirection     = dcs->ArcDirection;
 476     dc->xformWorld2Wnd   = dcs->xformWorld2Wnd;
 477     dc->xformWorld2Vport = dcs->xformWorld2Vport;
 478     dc->xformVport2World = dcs->xformVport2World;
 479     dc->vport2WorldValid = dcs->vport2WorldValid;
 480     dc->BoundsRect       = dcs->BoundsRect;
 481
 482     dc->wndOrgX          = dcs->wndOrgX;
 483     dc->wndOrgY          = dcs->wndOrgY;
 484     dc->wndExtX          = dcs->wndExtX;
 485     dc->wndExtY          = dcs->wndExtY;
 486     dc->vportOrgX        = dcs->vportOrgX;
 487     dc->vportOrgY        = dcs->vportOrgY;
 488     dc->vportExtX        = dcs->vportExtX;
 489     dc->vportExtY        = dcs->vportExtY;
 490
 491     if (dcs->hClipRgn)
 492     {
 493         if (!dc->hClipRgn) dc->hClipRgn = CreateRectRgn( 0, 0, 0, 0 );
 494         CombineRgn( dc->hClipRgn, dcs->hClipRgn, 0, RGN_COPY );
 495     }
 496     else
 497     {
 498         if (dc->hClipRgn) DeleteObject( dc->hClipRgn );
 499         dc->hClipRgn = 0;
 500     }
 501     if (dcs->hMetaRgn)
 502     {
 503         if (!dc->hMetaRgn) dc->hMetaRgn = CreateRectRgn( 0, 0, 0, 0 );
 504         CombineRgn( dc->hMetaRgn, dcs->hMetaRgn, 0, RGN_COPY );
 505     }
 506     else
 507     {
 508         if (dc->hMetaRgn) DeleteObject( dc->hMetaRgn );
 509         dc->hMetaRgn = 0;
 510     }
 511     CLIPPING_UpdateGCRegion( dc );
 512
 513     SelectObject( hdc, dcs->hBitmap );
 514     SelectObject( hdc, dcs->hBrush );
 515     SelectObject( hdc, dcs->hFont );
 516     SelectObject( hdc, dcs->hPen );
 517     SetBkColor( hdc, dcs->backgroundColor);
 518     SetTextColor( hdc, dcs->textColor);
 519     GDISelectPalette( hdc, dcs->hPalette, FALSE );
 520     release_dc_ptr( dc );
 521     release_dc_ptr( dcs );
 522 }
 523
 524
 525 /***********************************************************************
 526  *           GetDCState   (GDI.179)
 527  */
 528 HDC16 WINAPI GetDCState16( HDC16 hdc )
 529 {
 530     return HDC_16( GetDCState( HDC_32(hdc) ));
 531 }
 532
 533
 534 /***********************************************************************
 535  *           SetDCState   (GDI.180)
 536  */
 537 void WINAPI SetDCState16( HDC16 hdc, HDC16 hdcs )
 538 {
 539     SetDCState( HDC_32(hdc), HDC_32(hdcs) );
 540 }
 541
 542
 543 /***********************************************************************
 544  *           SaveDC    (GDI32.@)
 545  */
 546 INT WINAPI SaveDC( HDC hdc )
 547 {
 548     HDC hdcs;
 549     DC * dc, * dcs;
 550     INT ret;
 551
 552     dc = get_dc_ptr( hdc );
 553     if (!dc) return 0;
 554
 555     if(dc->funcs->pSaveDC)
 556     {
 557         ret = dc->funcs->pSaveDC( dc->physDev );
 558         if(ret)
 559             ret = ++dc->saveLevel;
 560         release_dc_ptr( dc );
 561         return ret;
 562     }
 563
 564     if (!(hdcs = GetDCState( hdc )))
 565     {
 566         release_dc_ptr( dc );
 567         return 0;
 568     }
 569     dcs = get_dc_ptr( hdcs );
 570
 571     /* Copy path. The reason why path saving / restoring is in SaveDC/
 572      * RestoreDC and not in GetDCState/SetDCState is that the ...DCState
 573      * functions are only in Win16 (which doesn't have paths) and that
 574      * SetDCState doesn't allow us to signal an error (which can happen
 575      * when copying paths).
 576      */
 577     if (!PATH_AssignGdiPath( &dcs->path, &dc->path ))
 578     {
 579         release_dc_ptr( dc );
 580         release_dc_ptr( dcs );
 581         DeleteDC( hdcs );
 582         return 0;
 583     }
 584
 585     dcs->saved_dc = dc->saved_dc;
 586     dc->saved_dc = hdcs;
 587     TRACE("(%p): returning %d\n", hdc, dc->saveLevel+1 );
 588     ret = ++dc->saveLevel;
 589     release_dc_ptr( dcs );
 590     release_dc_ptr( dc );
 591     return ret;
 592 }
 593
 594
 595 /***********************************************************************
 596  *           RestoreDC    (GDI32.@)
 597  */
 598 BOOL WINAPI RestoreDC( HDC hdc, INT level )
 599 {
 600     DC * dc, * dcs;
 601     BOOL success;
 602
 603     TRACE("%p %d\n", hdc, level );
 604     if (!(dc = get_dc_ptr( hdc ))) return FALSE;
 605
 606     if(abs(level) > dc->saveLevel || level == 0)
 607     {
 608         release_dc_ptr( dc );
 609         return FALSE;
 610     }
 611
 612     update_dc( dc );
 613
 614     if(dc->funcs->pRestoreDC)
 615     {
 616         success = dc->funcs->pRestoreDC( dc->physDev, level );
 617         if(level < 0) level = dc->saveLevel + level + 1;
 618         if(success)
 619             dc->saveLevel = level - 1;
 620         release_dc_ptr( dc );
 621         return success;
 622     }
 623
 624     if (level < 0) level = dc->saveLevel + level + 1;
 625     success=TRUE;
 626     while (dc->saveLevel >= level)
 627     {
 628         HDC hdcs = dc->saved_dc;
 629         if (!(dcs = get_dc_ptr( hdcs )))
 630         {
 631             success = FALSE;
 632             break;
 633         }
 634         dc->saved_dc = dcs->saved_dc;
 635         dcs->saved_dc = 0;
 636         if (--dc->saveLevel < level)
 637         {
 638             SetDCState( hdc, hdcs );
 639             if (!PATH_AssignGdiPath( &dc->path, &dcs->path ))
 640                 /* FIXME: This might not be quite right, since we're
 641                  * returning FALSE but still destroying the saved DC state */
 642                 success=FALSE;
 643         }
 644         release_dc_ptr( dcs );
 645         DeleteDC( hdcs );
 646     }
 647     release_dc_ptr( dc );
 648     return success;
 649 }
 650
 651
 652 /***********************************************************************
 653  *           CreateDCW    (GDI32.@)
 654  */
 655 HDC WINAPI CreateDCW( LPCWSTR driver, LPCWSTR device, LPCWSTR output,
 656                       const DEVMODEW *initData )
 657 {
 658     HDC hdc;
 659     DC * dc;
 660     const DC_FUNCTIONS *funcs;
 661     WCHAR buf[300];
 662
 663     GDI_CheckNotLock();
 664
 665     if (!device || !DRIVER_GetDriverName( device, buf, 300 ))
 666     {
 667         if (!driver)
 668         {
 669             ERR( "no device found for %s\n", debugstr_w(device) );
 670             return 0;
 671         }
 672         strcpyW(buf, driver);
 673     }
 674
 675     if (!(funcs = DRIVER_load_driver( buf )))
 676     {
 677         ERR( "no driver found for %s\n", debugstr_w(buf) );
 678         return 0;
 679     }
 680     if (!(dc = alloc_dc_ptr( funcs, OBJ_DC ))) goto error;
 681     hdc = dc->hSelf;
 682
 683     dc->hBitmap = GetStockObject( DEFAULT_BITMAP );
 684     if (!(dc->hVisRgn = CreateRectRgn( 0, 0, 1, 1 ))) goto error;
 685
 686     TRACE("(driver=%s, device=%s, output=%s): returning %p\n",
 687           debugstr_w(driver), debugstr_w(device), debugstr_w(output), dc->hSelf );
 688
 689     if (dc->funcs->pCreateDC &&
 690         !dc->funcs->pCreateDC( hdc, &dc->physDev, buf, device, output, initData ))
 691     {
 692         WARN("creation aborted by device\n" );
 693         goto error;
 694     }
 695
 696     SetRectRgn( dc->hVisRgn, 0, 0,
 697                 GetDeviceCaps( hdc, DESKTOPHORZRES ), GetDeviceCaps( hdc, DESKTOPVERTRES ) );
 698
 699     DC_InitDC( dc );
 700     release_dc_ptr( dc );
 701     return hdc;
 702
 703 error:
 704     if (dc && dc->hVisRgn) DeleteObject( dc->hVisRgn );
 705     if (dc) free_dc_ptr( dc );
 706     DRIVER_release_driver( funcs );
 707     return 0;
 708 }
 709
 710
 711 /***********************************************************************
 712  *           CreateDCA    (GDI32.@)
 713  */
 714 HDC WINAPI CreateDCA( LPCSTR driver, LPCSTR device, LPCSTR output,
 715                       const DEVMODEA *initData )
 716 {
 717     UNICODE_STRING driverW, deviceW, outputW;
 718     DEVMODEW *initDataW;
 719     HDC ret;
 720
 721     if (driver) RtlCreateUnicodeStringFromAsciiz(&driverW, driver);
 722     else driverW.Buffer = NULL;
 723
 724     if (device) RtlCreateUnicodeStringFromAsciiz(&deviceW, device);
 725     else deviceW.Buffer = NULL;
 726
 727     if (output) RtlCreateUnicodeStringFromAsciiz(&outputW, output);
 728     else outputW.Buffer = NULL;
 729
 730     initDataW = NULL;
 731     if (initData)
 732     {
 733         /* don't convert initData for DISPLAY driver, it's not used */
 734         if (!driverW.Buffer || strcmpiW( driverW.Buffer, displayW ))
 735             initDataW = GdiConvertToDevmodeW(initData);
 736     }
 737
 738     ret = CreateDCW( driverW.Buffer, deviceW.Buffer, outputW.Buffer, initDataW );
 739
 740     RtlFreeUnicodeString(&driverW);
 741     RtlFreeUnicodeString(&deviceW);
 742     RtlFreeUnicodeString(&outputW);
 743     HeapFree(GetProcessHeap(), 0, initDataW);
 744     return ret;
 745 }
 746
 747
 748 /***********************************************************************
 749  *           CreateICA    (GDI32.@)
 750  */
 751 HDC WINAPI CreateICA( LPCSTR driver, LPCSTR device, LPCSTR output,
 752                           const DEVMODEA* initData )
 753 {
 754       /* Nothing special yet for ICs */
 755     return CreateDCA( driver, device, output, initData );
 756 }
 757
 758
 759 /***********************************************************************
 760  *           CreateICW    (GDI32.@)
 761  */
 762 HDC WINAPI CreateICW( LPCWSTR driver, LPCWSTR device, LPCWSTR output,
 763                           const DEVMODEW* initData )
 764 {
 765       /* Nothing special yet for ICs */
 766     return CreateDCW( driver, device, output, initData );
 767 }
 768
 769
 770 /***********************************************************************
 771  *           CreateCompatibleDC   (GDI32.@)
 772  */
 773 HDC WINAPI CreateCompatibleDC( HDC hdc )
 774 {
 775     DC *dc, *origDC;
 776     HDC ret;
 777     const DC_FUNCTIONS *funcs = NULL;
 778     PHYSDEV physDev = NULL;
 779
 780     GDI_CheckNotLock();
 781
 782     if ((origDC = get_dc_ptr( hdc )))
 783     {
 784         if (GetObjectType( hdc ) == OBJ_DC)
 785         {
 786             funcs = origDC->funcs;
 787             physDev = origDC->physDev;
 788         }
 789         release_dc_ptr( origDC );
 790         if (funcs) funcs = DRIVER_get_driver( funcs );
 791     }
 792     else if (hdc) return 0;
 793
 794     if (!funcs && !(funcs = DRIVER_load_driver( displayW ))) return 0;
 795
 796     if (!(dc = alloc_dc_ptr( funcs, OBJ_MEMDC ))) goto error;
 797
 798     TRACE("(%p): returning %p\n", hdc, dc->hSelf );
 799
 800     dc->hBitmap = GetStockObject( DEFAULT_BITMAP );
 801     if (!(dc->hVisRgn = CreateRectRgn( 0, 0, 1, 1 ))) goto error;   /* default bitmap is 1x1 */
 802
 803     /* Copy the driver-specific physical device info into
 804      * the new DC. The driver may use this read-only info
 805      * while creating the compatible DC below. */
 806     dc->physDev = physDev;
 807     ret = dc->hSelf;
 808
 809     if (dc->funcs->pCreateDC &&
 810         !dc->funcs->pCreateDC( dc->hSelf, &dc->physDev, NULL, NULL, NULL, NULL ))
 811     {
 812         WARN("creation aborted by device\n");
 813         goto error;
 814     }
 815
 816     DC_InitDC( dc );
 817     release_dc_ptr( dc );
 818     return ret;
 819
 820 error:
 821     if (dc && dc->hVisRgn) DeleteObject( dc->hVisRgn );
 822     if (dc) free_dc_ptr( dc );
 823     DRIVER_release_driver( funcs );
 824     return 0;
 825 }
 826
 827
 828 /***********************************************************************
 829  *           DeleteDC    (GDI32.@)
 830  */
 831 BOOL WINAPI DeleteDC( HDC hdc )
 832 {
 833     const DC_FUNCTIONS *funcs = NULL;
 834     DC * dc;
 835
 836     TRACE("%p\n", hdc );
 837
 838     GDI_CheckNotLock();
 839
 840     if (!(dc = get_dc_ptr( hdc ))) return FALSE;
 841     if (dc->refcount != 1)
 842     {
 843         FIXME( "not deleting busy DC %p refcount %u\n", dc->hSelf, dc->refcount );
 844         release_dc_ptr( dc );
 845         return FALSE;
 846     }
 847
 848     /* Call hook procedure to check whether is it OK to delete this DC */
 849     if (dc->hookThunk && !dc->hookThunk( hdc, DCHC_DELETEDC, dc->dwHookData, 0 ))
 850     {
 851         release_dc_ptr( dc );
 852         return FALSE;
 853     }
 854
 855     while (dc->saveLevel)
 856     {
 857         DC * dcs;
 858         HDC hdcs = dc->saved_dc;
 859         if (!(dcs = get_dc_ptr( hdcs ))) break;
 860         dc->saved_dc = dcs->saved_dc;
 861         dc->saveLevel--;
 862         if (dcs->hClipRgn) DeleteObject( dcs->hClipRgn );
 863         if (dcs->hMetaRgn) DeleteObject( dcs->hMetaRgn );
 864         if (dcs->hMetaClipRgn) DeleteObject( dcs->hMetaClipRgn );
 865         if (dcs->hVisRgn) DeleteObject( dcs->hVisRgn );
 866         PATH_DestroyGdiPath(&dcs->path);
 867         free_dc_ptr( dcs );
 868     }
 869
 870     if (!(dc->flags & DC_SAVED))
 871     {
 872         SelectObject( hdc, GetStockObject(BLACK_PEN) );
 873         SelectObject( hdc, GetStockObject(WHITE_BRUSH) );
 874         SelectObject( hdc, GetStockObject(SYSTEM_FONT) );
 875         SelectObject( hdc, GetStockObject(DEFAULT_BITMAP) );
 876         funcs = dc->funcs;
 877         if (dc->funcs->pDeleteDC) dc->funcs->pDeleteDC(dc->physDev);
 878         dc->physDev = NULL;
 879     }
 880
 881     while (dc->saved_visrgn)
 882     {
 883         struct saved_visrgn *next = dc->saved_visrgn->next;
 884         DeleteObject( dc->saved_visrgn->hrgn );
 885         HeapFree( GetProcessHeap(), 0, dc->saved_visrgn );
 886         dc->saved_visrgn = next;
 887     }
 888     if (dc->hClipRgn) DeleteObject( dc->hClipRgn );
 889     if (dc->hMetaRgn) DeleteObject( dc->hMetaRgn );
 890     if (dc->hMetaClipRgn) DeleteObject( dc->hMetaClipRgn );
 891     if (dc->hVisRgn) DeleteObject( dc->hVisRgn );
 892     PATH_DestroyGdiPath(&dc->path);
 893
 894     free_dc_ptr( dc );
 895     if (funcs) DRIVER_release_driver( funcs );  /* do that after releasing the GDI lock */
 896     return TRUE;
 897 }
 898
 899
 900 /***********************************************************************
 901  *           ResetDCW    (GDI32.@)
 902  */
 903 HDC WINAPI ResetDCW( HDC hdc, const DEVMODEW *devmode )
 904 {
 905     DC *dc;
 906     HDC ret = hdc;
 907
 908     if ((dc = get_dc_ptr( hdc )))
 909     {
 910         if (dc->funcs->pResetDC) ret = dc->funcs->pResetDC( dc->physDev, devmode );
 911         release_dc_ptr( dc );
 912     }
 913     return ret;
 914 }
 915
 916
 917 /***********************************************************************
 918  *           ResetDCA    (GDI32.@)
 919  */
 920 HDC WINAPI ResetDCA( HDC hdc, const DEVMODEA *devmode )
 921 {
 922     DEVMODEW *devmodeW;
 923     HDC ret;
 924
 925     if (devmode) devmodeW = GdiConvertToDevmodeW(devmode);
 926     else devmodeW = NULL;
 927
 928     ret = ResetDCW(hdc, devmodeW);
 929
 930     HeapFree(GetProcessHeap(), 0, devmodeW);
 931     return ret;
 932 }
 933
 934
 935 /***********************************************************************
 936  *           GetDeviceCaps    (GDI32.@)
 937  */
 938 INT WINAPI GetDeviceCaps( HDC hdc, INT cap )
 939 {
 940     DC *dc;
 941     INT ret = 0;
 942
 943     if ((dc = get_dc_ptr( hdc )))
 944     {
 945         if (dc->funcs->pGetDeviceCaps) ret = dc->funcs->pGetDeviceCaps( dc->physDev, cap );
 946         else switch(cap)  /* return meaningful values for some entries */
 947         {
 948         case HORZRES:     ret = 640; break;
 949         case VERTRES:     ret = 480; break;
 950         case BITSPIXEL:   ret = 1; break;
 951         case PLANES:      ret = 1; break;
 952         case NUMCOLORS:   ret = 2; break;
 953         case ASPECTX:     ret = 36; break;
 954         case ASPECTY:     ret = 36; break;
 955         case ASPECTXY:    ret = 51; break;
 956         case LOGPIXELSX:  ret = 72; break;
 957         case LOGPIXELSY:  ret = 72; break;
 958         case SIZEPALETTE: ret = 2; break;
 959         }
 960         release_dc_ptr( dc );
 961     }
 962     return ret;
 963 }
 964
 965
 966 /***********************************************************************
 967  *              GetBkColor (GDI32.@)
 968  */
 969 COLORREF WINAPI GetBkColor( HDC hdc )
 970 {
 971     COLORREF ret = 0;
 972     DC * dc = get_dc_ptr( hdc );
 973     if (dc)
 974     {
 975         ret = dc->backgroundColor;
 976         release_dc_ptr( dc );
 977     }
 978     return ret;
 979 }
 980
 981
 982 /***********************************************************************
 983  *           SetBkColor    (GDI32.@)
 984  */
 985 COLORREF WINAPI SetBkColor( HDC hdc, COLORREF color )
 986 {
 987     COLORREF oldColor;
 988     DC * dc = get_dc_ptr( hdc );
 989
 990     TRACE("hdc=%p color=0x%08x\n", hdc, color);
 991
 992     if (!dc) return CLR_INVALID;
 993     oldColor = dc->backgroundColor;
 994     if (dc->funcs->pSetBkColor)
 995     {
 996         color = dc->funcs->pSetBkColor(dc->physDev, color);
 997         if (color == CLR_INVALID)  /* don't change it */
 998         {
 999             color = oldColor;
1000             oldColor = CLR_INVALID;
1001         }
1002     }
1003     dc->backgroundColor = color;
1004     release_dc_ptr( dc );
1005     return oldColor;
1006 }
1007
1008
1009 /***********************************************************************
1010  *              GetTextColor (GDI32.@)
1011  */
1012 COLORREF WINAPI GetTextColor( HDC hdc )
1013 {
1014     COLORREF ret = 0;
1015     DC * dc = get_dc_ptr( hdc );
1016     if (dc)
1017     {
1018         ret = dc->textColor;
1019         release_dc_ptr( dc );
1020     }
1021     return ret;
1022 }
1023
1024
1025 /***********************************************************************
1026  *           SetTextColor    (GDI32.@)
1027  */
1028 COLORREF WINAPI SetTextColor( HDC hdc, COLORREF color )
1029 {
1030     COLORREF oldColor;
1031     DC * dc = get_dc_ptr( hdc );
1032
1033     TRACE(" hdc=%p color=0x%08x\n", hdc, color);
1034
1035     if (!dc) return CLR_INVALID;
1036     oldColor = dc->textColor;
1037     if (dc->funcs->pSetTextColor)
1038     {
1039         color = dc->funcs->pSetTextColor(dc->physDev, color);
1040         if (color == CLR_INVALID)  /* don't change it */
1041         {
1042             color = oldColor;
1043             oldColor = CLR_INVALID;
1044         }
1045     }
1046     dc->textColor = color;
1047     release_dc_ptr( dc );
1048     return oldColor;
1049 }
1050
1051
1052 /***********************************************************************
1053  *              GetTextAlign (GDI32.@)
1054  */
1055 UINT WINAPI GetTextAlign( HDC hdc )
1056 {
1057     UINT ret = 0;
1058     DC * dc = get_dc_ptr( hdc );
1059     if (dc)
1060     {
1061         ret = dc->textAlign;
1062         release_dc_ptr( dc );
1063     }
1064     return ret;
1065 }
1066
1067
1068 /***********************************************************************
1069  *           SetTextAlign    (GDI32.@)
1070  */
1071 UINT WINAPI SetTextAlign( HDC hdc, UINT align )
1072 {
1073     UINT ret;
1074     DC *dc = get_dc_ptr( hdc );
1075
1076     TRACE("hdc=%p align=%d\n", hdc, align);
1077
1078     if (!dc) return 0x0;
1079     ret = dc->textAlign;
1080     if (dc->funcs->pSetTextAlign)
1081         if (!dc->funcs->pSetTextAlign(dc->physDev, align))
1082             ret = GDI_ERROR;
1083     if (ret != GDI_ERROR)
1084         dc->textAlign = align;
1085     release_dc_ptr( dc );
1086     return ret;
1087 }
1088
1089 /***********************************************************************
1090  *           GetDCOrgEx  (GDI32.@)
1091  */
1092 BOOL WINAPI GetDCOrgEx( HDC hDC, LPPOINT lpp )
1093 {
1094     DC * dc;
1095
1096     if (!lpp) return FALSE;
1097     if (!(dc = get_dc_ptr( hDC ))) return FALSE;
1098
1099     lpp->x = lpp->y = 0;
1100     if (dc->funcs->pGetDCOrgEx) dc->funcs->pGetDCOrgEx( dc->physDev, lpp );
1101     release_dc_ptr( dc );
1102     return TRUE;
1103 }
1104
1105
1106 /***********************************************************************
1107  *           SetDCOrg   (GDI.117)
1108  */
1109 DWORD WINAPI SetDCOrg16( HDC16 hdc16, INT16 x, INT16 y )
1110 {
1111     DWORD prevOrg = 0;
1112     HDC hdc = HDC_32( hdc16 );
1113     DC *dc = get_dc_ptr( hdc );
1114     if (!dc) return 0;
1115     if (dc->funcs->pSetDCOrg) prevOrg = dc->funcs->pSetDCOrg( dc->physDev, x, y );
1116     release_dc_ptr( dc );
1117     return prevOrg;
1118 }
1119
1120
1121 /***********************************************************************
1122  *              GetGraphicsMode (GDI32.@)
1123  */
1124 INT WINAPI GetGraphicsMode( HDC hdc )
1125 {
1126     INT ret = 0;
1127     DC * dc = get_dc_ptr( hdc );
1128     if (dc)
1129     {
1130         ret = dc->GraphicsMode;
1131         release_dc_ptr( dc );
1132     }
1133     return ret;
1134 }
1135
1136
1137 /***********************************************************************
1138  *           SetGraphicsMode    (GDI32.@)
1139  */
1140 INT WINAPI SetGraphicsMode( HDC hdc, INT mode )
1141 {
1142     INT ret = 0;
1143     DC *dc = get_dc_ptr( hdc );
1144
1145     /* One would think that setting the graphics mode to GM_COMPATIBLE
1146      * would also reset the world transformation matrix to the unity
1147      * matrix. However, in Windows, this is not the case. This doesn't
1148      * make a lot of sense to me, but that's the way it is.
1149      */
1150     if (!dc) return 0;
1151     if ((mode > 0) && (mode <= GM_LAST))
1152     {
1153         ret = dc->GraphicsMode;
1154         dc->GraphicsMode = mode;
1155     }
1156     release_dc_ptr( dc );
1157     return ret;
1158 }
1159
1160
1161 /***********************************************************************
1162  *              GetArcDirection (GDI32.@)
1163  */
1164 INT WINAPI GetArcDirection( HDC hdc )
1165 {
1166     INT ret = 0;
1167     DC * dc = get_dc_ptr( hdc );
1168     if (dc)
1169     {
1170         ret = dc->ArcDirection;
1171         release_dc_ptr( dc );
1172     }
1173     return ret;
1174 }
1175
1176
1177 /***********************************************************************
1178  *           SetArcDirection    (GDI32.@)
1179  */
1180 INT WINAPI SetArcDirection( HDC hdc, INT nDirection )
1181 {
1182     DC * dc;
1183     INT nOldDirection = 0;
1184
1185     if (nDirection!=AD_COUNTERCLOCKWISE && nDirection!=AD_CLOCKWISE)
1186     {
1187         SetLastError(ERROR_INVALID_PARAMETER);
1188         return 0;
1189     }
1190
1191     if ((dc = get_dc_ptr( hdc )))
1192     {
1193         if (dc->funcs->pSetArcDirection)
1194         {
1195             dc->funcs->pSetArcDirection(dc->physDev, nDirection);
1196         }
1197         nOldDirection = dc->ArcDirection;
1198         dc->ArcDirection = nDirection;
1199         release_dc_ptr( dc );
1200     }
1201     return nOldDirection;
1202 }
1203
1204
1205 /***********************************************************************
1206  *           GetWorldTransform    (GDI32.@)
1207  */
1208 BOOL WINAPI GetWorldTransform( HDC hdc, LPXFORM xform )
1209 {
1210     DC * dc;
1211     if (!xform) return FALSE;
1212     if (!(dc = get_dc_ptr( hdc ))) return FALSE;
1213     *xform = dc->xformWorld2Wnd;
1214     release_dc_ptr( dc );
1215     return TRUE;
1216 }
1217
1218
1219 /***********************************************************************
1220  *           GetTransform    (GDI32.@)
1221  */
1222 BOOL WINAPI GetTransform( HDC hdc, DWORD unknown, LPXFORM xform )
1223 {
1224     if (unknown == 0x0203) return GetWorldTransform( hdc, xform );
1225     FIXME("stub: don't know what to do for code %x\n", unknown );
1226     return FALSE;
1227 }
1228
1229
1230 /***********************************************************************
1231  *           SetWorldTransform    (GDI32.@)
1232  */
1233 BOOL WINAPI SetWorldTransform( HDC hdc, const XFORM *xform )
1234 {
1235     BOOL ret = FALSE;
1236     DC *dc = get_dc_ptr( hdc );
1237
1238     if (!dc) return FALSE;
1239     if (!xform) goto done;
1240
1241     /* Check that graphics mode is GM_ADVANCED */
1242     if (dc->GraphicsMode!=GM_ADVANCED) goto done;
1243
1244     TRACE("eM11 %f eM12 %f eM21 %f eM22 %f eDx %f eDy %f\n",
1245         xform->eM11, xform->eM12, xform->eM21, xform->eM22, xform->eDx, xform->eDy);
1246
1247     if (dc->funcs->pSetWorldTransform)
1248     {
1249         ret = dc->funcs->pSetWorldTransform(dc->physDev, xform);
1250         if (!ret) goto done;
1251     }
1252
1253     dc->xformWorld2Wnd = *xform;
1254     DC_UpdateXforms( dc );
1255     ret = TRUE;
1256  done:
1257     release_dc_ptr( dc );
1258     return ret;
1259 }
1260
1261
1262 /****************************************************************************
1263  * ModifyWorldTransform [GDI32.@]
1264  * Modifies the world transformation for a device context.
1265  *
1266  * PARAMS
1267  *    hdc   [I] Handle to device context
1268  *    xform [I] XFORM structure that will be used to modify the world
1269  *              transformation
1270  *    iMode [I] Specifies in what way to modify the world transformation
1271  *              Possible values:
1272  *              MWT_IDENTITY
1273  *                 Resets the world transformation to the identity matrix.
1274  *                 The parameter xform is ignored.
1275  *              MWT_LEFTMULTIPLY
1276  *                 Multiplies xform into the world transformation matrix from
1277  *                 the left.
1278  *              MWT_RIGHTMULTIPLY
1279  *                 Multiplies xform into the world transformation matrix from
1280  *                 the right.
1281  *
1282  * RETURNS
1283  *  Success: TRUE.
1284  *  Failure: FALSE. Use GetLastError() to determine the cause.
1285  */
1286 BOOL WINAPI ModifyWorldTransform( HDC hdc, const XFORM *xform,
1287     DWORD iMode )
1288 {
1289     BOOL ret = FALSE;
1290     DC *dc = get_dc_ptr( hdc );
1291
1292     /* Check for illegal parameters */
1293     if (!dc) return FALSE;
1294     if (!xform && iMode != MWT_IDENTITY) goto done;
1295
1296     /* Check that graphics mode is GM_ADVANCED */
1297     if (dc->GraphicsMode!=GM_ADVANCED) goto done;
1298
1299     if (dc->funcs->pModifyWorldTransform)
1300     {
1301         ret = dc->funcs->pModifyWorldTransform(dc->physDev, xform, iMode);
1302         if (!ret) goto done;
1303     }
1304
1305     switch (iMode)
1306     {
1307         case MWT_IDENTITY:
1308             dc->xformWorld2Wnd.eM11 = 1.0f;
1309             dc->xformWorld2Wnd.eM12 = 0.0f;
1310             dc->xformWorld2Wnd.eM21 = 0.0f;
1311             dc->xformWorld2Wnd.eM22 = 1.0f;
1312             dc->xformWorld2Wnd.eDx  = 0.0f;
1313             dc->xformWorld2Wnd.eDy  = 0.0f;
1314             break;
1315         case MWT_LEFTMULTIPLY:
1316             CombineTransform( &dc->xformWorld2Wnd, xform,
1317                 &dc->xformWorld2Wnd );
1318             break;
1319         case MWT_RIGHTMULTIPLY:
1320             CombineTransform( &dc->xformWorld2Wnd, &dc->xformWorld2Wnd,
1321                 xform );
1322             break;
1323         default:
1324             goto done;
1325     }
1326
1327     DC_UpdateXforms( dc );
1328     ret = TRUE;
1329  done:
1330     release_dc_ptr( dc );
1331     return ret;
1332 }
1333
1334
1335 /****************************************************************************
1336  * CombineTransform [GDI32.@]
1337  * Combines two transformation matrices.
1338  *
1339  * PARAMS
1340  *    xformResult [O] Stores the result of combining the two matrices
1341  *    xform1      [I] Specifies the first matrix to apply
1342  *    xform2      [I] Specifies the second matrix to apply
1343  *
1344  * REMARKS
1345  *    The same matrix can be passed in for more than one of the parameters.
1346  *
1347  * RETURNS
1348  *  Success: TRUE.
1349  *  Failure: FALSE. Use GetLastError() to determine the cause.
1350  */
1351 BOOL WINAPI CombineTransform( LPXFORM xformResult, const XFORM *xform1,
1352     const XFORM *xform2 )
1353 {
1354     XFORM xformTemp;
1355
1356     /* Check for illegal parameters */
1357     if (!xformResult || !xform1 || !xform2)
1358         return FALSE;
1359
1360     /* Create the result in a temporary XFORM, since xformResult may be
1361      * equal to xform1 or xform2 */
1362     xformTemp.eM11 = xform1->eM11 * xform2->eM11 +
1363                      xform1->eM12 * xform2->eM21;
1364     xformTemp.eM12 = xform1->eM11 * xform2->eM12 +
1365                      xform1->eM12 * xform2->eM22;
1366     xformTemp.eM21 = xform1->eM21 * xform2->eM11 +
1367                      xform1->eM22 * xform2->eM21;
1368     xformTemp.eM22 = xform1->eM21 * xform2->eM12 +
1369                      xform1->eM22 * xform2->eM22;
1370     xformTemp.eDx  = xform1->eDx  * xform2->eM11 +
1371                      xform1->eDy  * xform2->eM21 +
1372                      xform2->eDx;
1373     xformTemp.eDy  = xform1->eDx  * xform2->eM12 +
1374                      xform1->eDy  * xform2->eM22 +
1375                      xform2->eDy;
1376
1377     /* Copy the result to xformResult */
1378     *xformResult = xformTemp;
1379
1380     return TRUE;
1381 }
1382
1383
1384 /***********************************************************************
1385  *           SetDCHook   (GDI32.@)
1386  *
1387  * Note: this doesn't exist in Win32, we add it here because user32 needs it.
1388  */
1389 BOOL WINAPI SetDCHook( HDC hdc, DCHOOKPROC hookProc, DWORD_PTR dwHookData )
1390 {
1391     DC *dc = get_dc_ptr( hdc );
1392
1393     if (!dc) return FALSE;
1394
1395     if (!(dc->flags & DC_SAVED))
1396     {
1397         dc->dwHookData = dwHookData;
1398         dc->hookThunk = hookProc;
1399     }
1400     release_dc_ptr( dc );
1401     return TRUE;
1402 }
1403
1404
1405 /***********************************************************************
1406  *           GetDCHook   (GDI32.@)
1407  *
1408  * Note: this doesn't exist in Win32, we add it here because user32 needs it.
1409  */
1410 DWORD_PTR WINAPI GetDCHook( HDC hdc, DCHOOKPROC *proc )
1411 {
1412     DC *dc = get_dc_ptr( hdc );
1413     DWORD_PTR ret;
1414
1415     if (!dc) return 0;
1416     if (proc) *proc = dc->hookThunk;
1417     ret = dc->dwHookData;
1418     release_dc_ptr( dc );
1419     return ret;
1420 }
1421
1422
1423 /* relay function to call the 16-bit DC hook proc */
1424 static BOOL WINAPI call_dc_hook16( HDC hdc, WORD code, DWORD_PTR data, LPARAM lParam )
1425 {
1426     WORD args[6];
1427     DWORD ret = 0;
1428     DC *dc = get_dc_ptr( hdc );
1429
1430     if (!dc) return FALSE;
1431     if (dc->hookProc)
1432     {
1433         args[5] = HDC_16(hdc);
1434         args[4] = code;
1435         args[3] = HIWORD(data);
1436         args[2] = LOWORD(data);
1437         args[1] = HIWORD(lParam);
1438         args[0] = LOWORD(lParam);
1439         WOWCallback16Ex( (DWORD)dc->hookProc, WCB16_PASCAL, sizeof(args), args, &ret );
1440     }
1441     release_dc_ptr( dc );
1442     return LOWORD(ret);
1443 }
1444
1445 /***********************************************************************
1446  *           SetDCHook   (GDI.190)
1447  */
1448 BOOL16 WINAPI SetDCHook16( HDC16 hdc16, FARPROC16 hookProc, DWORD dwHookData )
1449 {
1450     DC *dc = get_dc_ptr( HDC_32(hdc16) );
1451
1452     if (!dc) return FALSE;
1453     if (!(dc->flags & DC_SAVED))
1454     {
1455         dc->dwHookData = dwHookData;
1456         dc->hookThunk = call_dc_hook16;
1457         dc->hookProc = hookProc;
1458     }
1459     release_dc_ptr( dc );
1460     return TRUE;
1461 }
1462
1463
1464 /***********************************************************************
1465  *           GetDCHook   (GDI.191)
1466  */
1467 DWORD WINAPI GetDCHook16( HDC16 hdc16, FARPROC16 *phookProc )
1468 {
1469     HDC hdc = HDC_32( hdc16 );
1470     DC *dc = get_dc_ptr( hdc );
1471     DWORD ret;
1472
1473     if (!dc) return 0;
1474     *phookProc = dc->hookProc;
1475     ret = dc->dwHookData;
1476     release_dc_ptr( dc );
1477     return ret;
1478 }
1479
1480
1481 /***********************************************************************
1482  *           SetHookFlags   (GDI32.@)
1483  *
1484  * Note: this doesn't exist in Win32, we add it here because user32 needs it.
1485  */
1486 WORD WINAPI SetHookFlags( HDC hdc, WORD flags )
1487 {
1488     DC *dc = get_dc_obj( hdc );  /* not get_dc_ptr, this needs to work from any thread */
1489     LONG ret = 0;
1490
1491     if (!dc) return 0;
1492
1493     /* "Undocumented Windows" info is slightly confusing. */
1494
1495     TRACE("hDC %p, flags %04x\n",hdc,flags);
1496
1497     if (flags & DCHF_INVALIDATEVISRGN)
1498         ret = InterlockedExchange( &dc->dirty, 1 );
1499     else if (flags & DCHF_VALIDATEVISRGN || !flags)
1500         ret = InterlockedExchange( &dc->dirty, 0 );
1501
1502     GDI_ReleaseObj( dc );
1503     return ret;
1504 }
1505
1506 /***********************************************************************
1507  *           SetICMMode    (GDI32.@)
1508  */
1509 INT WINAPI SetICMMode(HDC hdc, INT iEnableICM)
1510 {
1511 /*FIXME:  Assume that ICM is always off, and cannot be turned on */
1512     if (iEnableICM == ICM_OFF) return ICM_OFF;
1513     if (iEnableICM == ICM_ON) return 0;
1514     if (iEnableICM == ICM_QUERY) return ICM_OFF;
1515     return 0;
1516 }
1517
1518 /***********************************************************************
1519  *           GetDeviceGammaRamp    (GDI32.@)
1520  */
1521 BOOL WINAPI GetDeviceGammaRamp(HDC hDC, LPVOID ptr)
1522 {
1523     BOOL ret = FALSE;
1524     DC *dc = get_dc_ptr( hDC );
1525
1526     if( dc )
1527     {
1528         if (dc->funcs->pGetDeviceGammaRamp)
1529             ret = dc->funcs->pGetDeviceGammaRamp(dc->physDev, ptr);
1530         release_dc_ptr( dc );
1531     }
1532     return ret;
1533 }
1534
1535 /***********************************************************************
1536  *           SetDeviceGammaRamp    (GDI32.@)
1537  */
1538 BOOL WINAPI SetDeviceGammaRamp(HDC hDC, LPVOID ptr)
1539 {
1540     BOOL ret = FALSE;
1541     DC *dc = get_dc_ptr( hDC );
1542
1543     if( dc )
1544     {
1545         if (dc->funcs->pSetDeviceGammaRamp)
1546             ret = dc->funcs->pSetDeviceGammaRamp(dc->physDev, ptr);
1547         release_dc_ptr( dc );
1548     }
1549     return ret;
1550 }
1551
1552 /***********************************************************************
1553  *           GetColorSpace    (GDI32.@)
1554  */
1555 HCOLORSPACE WINAPI GetColorSpace(HDC hdc)
1556 {
1557 /*FIXME    Need to to whatever GetColorSpace actually does */
1558     return 0;
1559 }
1560
1561 /***********************************************************************
1562  *           CreateColorSpaceA    (GDI32.@)
1563  */
1564 HCOLORSPACE WINAPI CreateColorSpaceA( LPLOGCOLORSPACEA lpLogColorSpace )
1565 {
1566   FIXME( "stub\n" );
1567   return 0;
1568 }
1569
1570 /***********************************************************************
1571  *           CreateColorSpaceW    (GDI32.@)
1572  */
1573 HCOLORSPACE WINAPI CreateColorSpaceW( LPLOGCOLORSPACEW lpLogColorSpace )
1574 {
1575   FIXME( "stub\n" );
1576   return 0;
1577 }
1578
1579 /***********************************************************************
1580  *           DeleteColorSpace     (GDI32.@)
1581  */
1582 BOOL WINAPI DeleteColorSpace( HCOLORSPACE hColorSpace )
1583 {
1584   FIXME( "stub\n" );
1585
1586   return TRUE;
1587 }
1588
1589 /***********************************************************************
1590  *           SetColorSpace     (GDI32.@)
1591  */
1592 HCOLORSPACE WINAPI SetColorSpace( HDC hDC, HCOLORSPACE hColorSpace )
1593 {
1594   FIXME( "stub\n" );
1595
1596   return hColorSpace;
1597 }
1598
1599 /***********************************************************************
1600  *           GetBoundsRect    (GDI32.@)
1601  */
1602 UINT WINAPI GetBoundsRect(HDC hdc, LPRECT rect, UINT flags)
1603 {
1604     UINT ret;
1605     DC *dc = get_dc_ptr( hdc );
1606
1607     if ( !dc ) return 0;
1608
1609     if (rect) *rect = dc->BoundsRect;
1610
1611     ret = ((dc->flags & DC_BOUNDS_SET) ? DCB_SET : DCB_RESET);
1612
1613     if (flags & DCB_RESET)
1614     {
1615         dc->BoundsRect.left   = 0;
1616         dc->BoundsRect.top    = 0;
1617         dc->BoundsRect.right  = 0;
1618         dc->BoundsRect.bottom = 0;
1619         dc->flags &= ~DC_BOUNDS_SET;
1620     }
1621     release_dc_ptr( dc );
1622     return ret;
1623 }
1624
1625
1626 /***********************************************************************
1627  *           SetBoundsRect    (GDI32.@)
1628  */
1629 UINT WINAPI SetBoundsRect(HDC hdc, const RECT* rect, UINT flags)
1630 {
1631     UINT ret;
1632     DC *dc;
1633
1634     if ((flags & DCB_ENABLE) && (flags & DCB_DISABLE)) return 0;
1635     if (!(dc = get_dc_ptr( hdc ))) return 0;
1636
1637     ret = ((dc->flags & DC_BOUNDS_ENABLE) ? DCB_ENABLE : DCB_DISABLE) |
1638           ((dc->flags & DC_BOUNDS_SET) ? DCB_SET : DCB_RESET);
1639
1640     if (flags & DCB_RESET)
1641     {
1642         dc->BoundsRect.left   = 0;
1643         dc->BoundsRect.top    = 0;
1644         dc->BoundsRect.right  = 0;
1645         dc->BoundsRect.bottom = 0;
1646         dc->flags &= ~DC_BOUNDS_SET;
1647     }
1648
1649     if ((flags & DCB_ACCUMULATE) && rect && rect->left < rect->right && rect->top < rect->bottom)
1650     {
1651         if (dc->flags & DC_BOUNDS_SET)
1652         {
1653             dc->BoundsRect.left   = min( dc->BoundsRect.left, rect->left );
1654             dc->BoundsRect.top    = min( dc->BoundsRect.top, rect->top );
1655             dc->BoundsRect.right  = max( dc->BoundsRect.right, rect->right );
1656             dc->BoundsRect.bottom = max( dc->BoundsRect.bottom, rect->bottom );
1657         }
1658         else
1659         {
1660             dc->BoundsRect = *rect;
1661             dc->flags |= DC_BOUNDS_SET;
1662         }
1663     }
1664
1665     if (flags & DCB_ENABLE) dc->flags |= DC_BOUNDS_ENABLE;
1666     if (flags & DCB_DISABLE) dc->flags &= ~DC_BOUNDS_ENABLE;
1667
1668     release_dc_ptr( dc );
1669     return ret;
1670 }
1671
1672
1673 /***********************************************************************
1674  *              GetRelAbs               (GDI32.@)
1675  */
1676 INT WINAPI GetRelAbs( HDC hdc, DWORD dwIgnore )
1677 {
1678     INT ret = 0;
1679     DC *dc = get_dc_ptr( hdc );
1680     if (dc)
1681     {
1682         ret = dc->relAbsMode;
1683         release_dc_ptr( dc );
1684     }
1685     return ret;
1686 }
1687
1688
1689
1690
1691 /***********************************************************************
1692  *              GetBkMode (GDI32.@)
1693  */
1694 INT WINAPI GetBkMode( HDC hdc )
1695 {
1696     INT ret = 0;
1697     DC * dc = get_dc_ptr( hdc );
1698     if (dc)
1699     {
1700         ret = dc->backgroundMode;
1701         release_dc_ptr( dc );
1702     }
1703     return ret;
1704 }
1705
1706
1707 /***********************************************************************
1708  *              SetBkMode (GDI32.@)
1709  */
1710 INT WINAPI SetBkMode( HDC hdc, INT mode )
1711 {
1712     INT ret;
1713     DC *dc;
1714     if ((mode <= 0) || (mode > BKMODE_LAST))
1715     {
1716         SetLastError(ERROR_INVALID_PARAMETER);
1717         return 0;
1718     }
1719     if (!(dc = get_dc_ptr( hdc ))) return 0;
1720
1721     ret = dc->backgroundMode;
1722     if (dc->funcs->pSetBkMode)
1723         if (!dc->funcs->pSetBkMode( dc->physDev, mode ))
1724             ret = 0;
1725     if (ret)
1726         dc->backgroundMode = mode;
1727     release_dc_ptr( dc );
1728     return ret;
1729 }
1730
1731
1732 /***********************************************************************
1733  *              GetROP2 (GDI32.@)
1734  */
1735 INT WINAPI GetROP2( HDC hdc )
1736 {
1737     INT ret = 0;
1738     DC * dc = get_dc_ptr( hdc );
1739     if (dc)
1740     {
1741         ret = dc->ROPmode;
1742         release_dc_ptr( dc );
1743     }
1744     return ret;
1745 }
1746
1747
1748 /***********************************************************************
1749  *              SetROP2 (GDI32.@)
1750  */
1751 INT WINAPI SetROP2( HDC hdc, INT mode )
1752 {
1753     INT ret;
1754     DC *dc;
1755     if ((mode < R2_BLACK) || (mode > R2_WHITE))
1756     {
1757         SetLastError(ERROR_INVALID_PARAMETER);
1758         return 0;
1759     }
1760     if (!(dc = get_dc_ptr( hdc ))) return 0;
1761     ret = dc->ROPmode;
1762     if (dc->funcs->pSetROP2)
1763         if (!dc->funcs->pSetROP2( dc->physDev, mode ))
1764             ret = 0;
1765     if (ret)
1766         dc->ROPmode = mode;
1767     release_dc_ptr( dc );
1768     return ret;
1769 }
1770
1771
1772 /***********************************************************************
1773  *              SetRelAbs (GDI32.@)
1774  */
1775 INT WINAPI SetRelAbs( HDC hdc, INT mode )
1776 {
1777     INT ret;
1778     DC *dc;
1779     if ((mode != ABSOLUTE) && (mode != RELATIVE))
1780     {
1781         SetLastError(ERROR_INVALID_PARAMETER);
1782         return 0;
1783     }
1784     if (!(dc = get_dc_ptr( hdc ))) return 0;
1785     if (dc->funcs->pSetRelAbs)
1786         ret = dc->funcs->pSetRelAbs( dc->physDev, mode );
1787     else
1788     {
1789         ret = dc->relAbsMode;
1790         dc->relAbsMode = mode;
1791     }
1792     release_dc_ptr( dc );
1793     return ret;
1794 }
1795
1796
1797 /***********************************************************************
1798  *              GetPolyFillMode (GDI32.@)
1799  */
1800 INT WINAPI GetPolyFillMode( HDC hdc )
1801 {
1802     INT ret = 0;
1803     DC * dc = get_dc_ptr( hdc );
1804     if (dc)
1805     {
1806         ret = dc->polyFillMode;
1807         release_dc_ptr( dc );
1808     }
1809     return ret;
1810 }
1811
1812
1813 /***********************************************************************
1814  *              SetPolyFillMode (GDI32.@)
1815  */
1816 INT WINAPI SetPolyFillMode( HDC hdc, INT mode )
1817 {
1818     INT ret;
1819     DC *dc;
1820     if ((mode <= 0) || (mode > POLYFILL_LAST))
1821     {
1822         SetLastError(ERROR_INVALID_PARAMETER);
1823         return 0;
1824     }
1825     if (!(dc = get_dc_ptr( hdc ))) return 0;
1826     ret = dc->polyFillMode;
1827     if (dc->funcs->pSetPolyFillMode)
1828         if (!dc->funcs->pSetPolyFillMode( dc->physDev, mode ))
1829             ret = 0;
1830     if (ret)
1831         dc->polyFillMode = mode;
1832     release_dc_ptr( dc );
1833     return ret;
1834 }
1835
1836
1837 /***********************************************************************
1838  *              GetStretchBltMode (GDI32.@)
1839  */
1840 INT WINAPI GetStretchBltMode( HDC hdc )
1841 {
1842     INT ret = 0;
1843     DC * dc = get_dc_ptr( hdc );
1844     if (dc)
1845     {
1846         ret = dc->stretchBltMode;
1847         release_dc_ptr( dc );
1848     }
1849     return ret;
1850 }
1851
1852
1853 /***********************************************************************
1854  *              SetStretchBltMode (GDI32.@)
1855  */
1856 INT WINAPI SetStretchBltMode( HDC hdc, INT mode )
1857 {
1858     INT ret;
1859     DC *dc;
1860     if ((mode <= 0) || (mode > MAXSTRETCHBLTMODE))
1861     {
1862         SetLastError(ERROR_INVALID_PARAMETER);
1863         return 0;
1864     }
1865     if (!(dc = get_dc_ptr( hdc ))) return 0;
1866     ret = dc->stretchBltMode;
1867     if (dc->funcs->pSetStretchBltMode)
1868         if (!dc->funcs->pSetStretchBltMode( dc->physDev, mode ))
1869             ret = 0;
1870     if (ret)
1871         dc->stretchBltMode = mode;
1872     release_dc_ptr( dc );
1873     return ret;
1874 }
1875
1876
1877 /***********************************************************************
1878  *              GetMapMode (GDI32.@)
1879  */
1880 INT WINAPI GetMapMode( HDC hdc )
1881 {
1882     INT ret = 0;
1883     DC * dc = get_dc_ptr( hdc );
1884     if (dc)
1885     {
1886         ret = dc->MapMode;
1887         release_dc_ptr( dc );
1888     }
1889     return ret;
1890 }
1891
1892
1893 /***********************************************************************
1894  *              GetBrushOrgEx (GDI32.@)
1895  */
1896 BOOL WINAPI GetBrushOrgEx( HDC hdc, LPPOINT pt )
1897 {
1898     DC * dc = get_dc_ptr( hdc );
1899     if (!dc) return FALSE;
1900     pt->x = dc->brushOrgX;
1901     pt->y = dc->brushOrgY;
1902     release_dc_ptr( dc );
1903     return TRUE;
1904 }
1905
1906
1907 /***********************************************************************
1908  *              GetCurrentPositionEx (GDI32.@)
1909  */
1910 BOOL WINAPI GetCurrentPositionEx( HDC hdc, LPPOINT pt )
1911 {
1912     DC * dc = get_dc_ptr( hdc );
1913     if (!dc) return FALSE;
1914     pt->x = dc->CursPosX;
1915     pt->y = dc->CursPosY;
1916     release_dc_ptr( dc );
1917     return TRUE;
1918 }
1919
1920
1921 /***********************************************************************
1922  *              GetViewportExtEx (GDI32.@)
1923  */
1924 BOOL WINAPI GetViewportExtEx( HDC hdc, LPSIZE size )
1925 {
1926     DC * dc = get_dc_ptr( hdc );
1927     if (!dc) return FALSE;
1928     size->cx = dc->vportExtX;
1929     size->cy = dc->vportExtY;
1930     release_dc_ptr( dc );
1931     return TRUE;
1932 }
1933
1934
1935 /***********************************************************************
1936  *              GetViewportOrgEx (GDI32.@)
1937  */
1938 BOOL WINAPI GetViewportOrgEx( HDC hdc, LPPOINT pt )
1939 {
1940     DC * dc = get_dc_ptr( hdc );
1941     if (!dc) return FALSE;
1942     pt->x = dc->vportOrgX;
1943     pt->y = dc->vportOrgY;
1944     release_dc_ptr( dc );
1945     return TRUE;
1946 }
1947
1948
1949 /***********************************************************************
1950  *              GetWindowExtEx (GDI32.@)
1951  */
1952 BOOL WINAPI GetWindowExtEx( HDC hdc, LPSIZE size )
1953 {
1954     DC * dc = get_dc_ptr( hdc );
1955     if (!dc) return FALSE;
1956     size->cx = dc->wndExtX;
1957     size->cy = dc->wndExtY;
1958     release_dc_ptr( dc );
1959     return TRUE;
1960 }
1961
1962
1963 /***********************************************************************
1964  *              GetWindowOrgEx (GDI32.@)
1965  */
1966 BOOL WINAPI GetWindowOrgEx( HDC hdc, LPPOINT pt )
1967 {
1968     DC * dc = get_dc_ptr( hdc );
1969     if (!dc) return FALSE;
1970     pt->x = dc->wndOrgX;
1971     pt->y = dc->wndOrgY;
1972     release_dc_ptr( dc );
1973     return TRUE;
1974 }
1975
1976
1977 /***********************************************************************
1978  *              InquireVisRgn   (GDI.131)
1979  */
1980 HRGN16 WINAPI InquireVisRgn16( HDC16 hdc )
1981 {
1982     HRGN16 ret = 0;
1983     DC * dc = get_dc_ptr( HDC_32(hdc) );
1984     if (dc)
1985     {
1986         ret = HRGN_16(dc->hVisRgn);
1987         release_dc_ptr( dc );
1988     }
1989     return ret;
1990 }
1991
1992
1993 /***********************************************************************
1994  *              GetClipRgn (GDI.173)
1995  */
1996 HRGN16 WINAPI GetClipRgn16( HDC16 hdc )
1997 {
1998     HRGN16 ret = 0;
1999     DC * dc = get_dc_ptr( HDC_32(hdc) );
2000     if (dc)
2001     {
2002         ret = HRGN_16(dc->hClipRgn);
2003         release_dc_ptr( dc );
2004     }
2005     return ret;
2006 }
2007
2008
2009 /***********************************************************************
2010  *           GetLayout    (GDI32.@)
2011  *
2012  * Gets left->right or right->left text layout flags of a dc.
2013  *
2014  */
2015 DWORD WINAPI GetLayout(HDC hdc)
2016 {
2017     DWORD layout = GDI_ERROR;
2018
2019     DC * dc = get_dc_ptr( hdc );
2020     if (dc)
2021     {
2022         layout = dc->layout;
2023         release_dc_ptr( dc );
2024     }
2025
2026     TRACE("hdc : %p, layout : %08x\n", hdc, layout);
2027
2028     return layout;
2029 }
2030
2031 /***********************************************************************
2032  *           SetLayout    (GDI32.@)
2033  *
2034  * Sets left->right or right->left text layout flags of a dc.
2035  *
2036  */
2037 DWORD WINAPI SetLayout(HDC hdc, DWORD layout)
2038 {
2039     DWORD oldlayout = GDI_ERROR;
2040
2041     DC * dc = get_dc_ptr( hdc );
2042     if (dc)
2043     {
2044         oldlayout = dc->layout;
2045         dc->layout = layout;
2046         release_dc_ptr( dc );
2047     }
2048
2049     TRACE("hdc : %p, old layout : %08x, new layout : %08x\n", hdc, oldlayout, layout);
2050
2051     return oldlayout;
2052 }
2053
2054 /***********************************************************************
2055  *           GetDCBrushColor    (GDI32.@)
2056  *
2057  * Retrieves the current brush color for the specified device
2058  * context (DC).
2059  *
2060  */
2061 COLORREF WINAPI GetDCBrushColor(HDC hdc)
2062 {
2063     DC *dc;
2064     COLORREF dcBrushColor = CLR_INVALID;
2065
2066     TRACE("hdc(%p)\n", hdc);
2067
2068     dc = get_dc_ptr( hdc );
2069     if (dc)
2070     {
2071         dcBrushColor = dc->dcBrushColor;
2072         release_dc_ptr( dc );
2073     }
2074
2075     return dcBrushColor;
2076 }
2077
2078 /***********************************************************************
2079  *           SetDCBrushColor    (GDI32.@)
2080  *
2081  * Sets the current device context (DC) brush color to the specified
2082  * color value. If the device cannot represent the specified color
2083  * value, the color is set to the nearest physical color.
2084  *
2085  */
2086 COLORREF WINAPI SetDCBrushColor(HDC hdc, COLORREF crColor)
2087 {
2088     DC *dc;
2089     COLORREF oldClr = CLR_INVALID;
2090
2091     TRACE("hdc(%p) crColor(%08x)\n", hdc, crColor);
2092
2093     dc = get_dc_ptr( hdc );
2094     if (dc)
2095     {
2096         if (dc->funcs->pSetDCBrushColor)
2097             crColor = dc->funcs->pSetDCBrushColor( dc->physDev, crColor );
2098         else if (dc->hBrush == GetStockObject( DC_BRUSH ))
2099         {
2100             /* If DC_BRUSH is selected, update driver pen color */
2101             HBRUSH hBrush = CreateSolidBrush( crColor );
2102             dc->funcs->pSelectBrush( dc->physDev, hBrush );
2103             DeleteObject( hBrush );
2104         }
2105
2106         if (crColor != CLR_INVALID)
2107         {
2108             oldClr = dc->dcBrushColor;
2109             dc->dcBrushColor = crColor;
2110         }
2111
2112         release_dc_ptr( dc );
2113     }
2114
2115     return oldClr;
2116 }
2117
2118 /***********************************************************************
2119  *           GetDCPenColor    (GDI32.@)
2120  *
2121  * Retrieves the current pen color for the specified device
2122  * context (DC).
2123  *
2124  */
2125 COLORREF WINAPI GetDCPenColor(HDC hdc)
2126 {
2127     DC *dc;
2128     COLORREF dcPenColor = CLR_INVALID;
2129
2130     TRACE("hdc(%p)\n", hdc);
2131
2132     dc = get_dc_ptr( hdc );
2133     if (dc)
2134     {
2135         dcPenColor = dc->dcPenColor;
2136         release_dc_ptr( dc );
2137     }
2138
2139     return dcPenColor;
2140 }
2141
2142 /***********************************************************************
2143  *           SetDCPenColor    (GDI32.@)
2144  *
2145  * Sets the current device context (DC) pen color to the specified
2146  * color value. If the device cannot represent the specified color
2147  * value, the color is set to the nearest physical color.
2148  *
2149  */
2150 COLORREF WINAPI SetDCPenColor(HDC hdc, COLORREF crColor)
2151 {
2152     DC *dc;
2153     COLORREF oldClr = CLR_INVALID;
2154
2155     TRACE("hdc(%p) crColor(%08x)\n", hdc, crColor);
2156
2157     dc = get_dc_ptr( hdc );
2158     if (dc)
2159     {
2160         if (dc->funcs->pSetDCPenColor)
2161             crColor = dc->funcs->pSetDCPenColor( dc->physDev, crColor );
2162         else if (dc->hPen == GetStockObject( DC_PEN ))
2163         {
2164             /* If DC_PEN is selected, update the driver pen color */
2165             LOGPEN logpen = { PS_SOLID, { 0, 0 }, crColor };
2166             HPEN hPen = CreatePenIndirect( &logpen );
2167             dc->funcs->pSelectPen( dc->physDev, hPen );
2168             DeleteObject( hPen );
2169         }
2170
2171         if (crColor != CLR_INVALID)
2172         {
2173             oldClr = dc->dcPenColor;
2174             dc->dcPenColor = crColor;
2175         }
2176
2177         release_dc_ptr( dc );
2178     }
2179
2180     return oldClr;
2181 }
2182
2183 /***********************************************************************
2184  *           CancelDC    (GDI32.@)
2185  */
2186 BOOL WINAPI CancelDC(HDC hdc)
2187 {
2188     FIXME("stub\n");
2189     return TRUE;
2190 }
2191
2192 /***********************************************************************
2193  *           SetVirtualResolution   (GDI32.@)
2194  *
2195  * Undocumented on msdn.  Called when PowerPoint XP saves a file.
2196  */
2197 DWORD WINAPI SetVirtualResolution(HDC hdc, DWORD dw2, DWORD dw3, DWORD dw4, DWORD dw5)
2198 {
2199     FIXME("(%p %08x %08x %08x %08x): stub!\n", hdc, dw2, dw3, dw4, dw5);
2200     return FALSE;
2201 }
2202
2203 /*******************************************************************
2204  *      GetMiterLimit [GDI32.@]
2205  *
2206  *
2207  */
2208 BOOL WINAPI GetMiterLimit(HDC hdc, PFLOAT peLimit)
2209 {
2210     BOOL bRet = FALSE;
2211     DC *dc;
2212
2213     TRACE("(%p,%p)\n", hdc, peLimit);
2214
2215     dc = get_dc_ptr( hdc );
2216     if (dc)
2217     {
2218         if (peLimit)
2219             *peLimit = dc->miterLimit;
2220
2221         release_dc_ptr( dc );
2222         bRet = TRUE;
2223     }
2224     return bRet;
2225 }
2226
2227 /*******************************************************************
2228  *      SetMiterLimit [GDI32.@]
2229  *
2230  *
2231  */
2232 BOOL WINAPI SetMiterLimit(HDC hdc, FLOAT eNewLimit, PFLOAT peOldLimit)
2233 {
2234     BOOL bRet = FALSE;
2235     DC *dc;
2236
2237     TRACE("(%p,%f,%p)\n", hdc, eNewLimit, peOldLimit);
2238
2239     dc = get_dc_ptr( hdc );
2240     if (dc)
2241     {
2242         if (peOldLimit)
2243             *peOldLimit = dc->miterLimit;
2244         dc->miterLimit = eNewLimit;
2245         release_dc_ptr( dc );
2246         bRet = TRUE;
2247     }
2248     return bRet;
2249 }
2250
2251 /*******************************************************************
2252  *      GdiIsMetaPrintDC [GDI32.@]
2253  */
2254 BOOL WINAPI GdiIsMetaPrintDC(HDC hdc)
2255 {
2256     FIXME("%p\n", hdc);
2257     return FALSE;
2258 }
2259
2260 /*******************************************************************
2261  *      GdiIsMetaFileDC [GDI32.@]
2262  */
2263 BOOL WINAPI GdiIsMetaFileDC(HDC hdc)
2264 {
2265     TRACE("%p\n", hdc);
2266
2267     switch( GetObjectType( hdc ) )
2268     {
2269     case OBJ_METADC:
2270     case OBJ_ENHMETADC:
2271         return TRUE;
2272     }
2273     return FALSE;
2274 }
2275
2276 /*******************************************************************
2277  *      GdiIsPlayMetafileDC [GDI32.@]
2278  */
2279 BOOL WINAPI GdiIsPlayMetafileDC(HDC hdc)
2280 {
2281     FIXME("%p\n", hdc);
2282     return FALSE;
2283 }