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, void *obj );
  43
  44 static const struct gdi_obj_funcs dc_funcs =
  45 {
  46     NULL,             /* pSelectObject */
  47     NULL,             /* pGetObject16 */
  48     NULL,             /* pGetObjectA */
  49     NULL,             /* pGetObjectW */
  50     NULL,             /* pUnrealizeObject */
  51     DC_DeleteObject   /* pDeleteObject */
  52 };
  53
  54
  55 static inline DC *get_dc_obj( HDC hdc )
  56 {
  57     DC *dc = GDI_GetObjPtr( hdc, MAGIC_DONTCARE );
  58     if (!dc) return NULL;
  59
  60     if ((GDIMAGIC(dc->header.wMagic) != DC_MAGIC) &&
  61         (GDIMAGIC(dc->header.wMagic) != MEMORY_DC_MAGIC) &&
  62         (GDIMAGIC(dc->header.wMagic) != METAFILE_DC_MAGIC) &&
  63         (GDIMAGIC(dc->header.wMagic) != ENHMETAFILE_DC_MAGIC))
  64     {
  65         GDI_ReleaseObj( hdc );
  66         SetLastError( ERROR_INVALID_HANDLE );
  67         dc = NULL;
  68     }
  69     return dc;
  70 }
  71
  72
  73 /***********************************************************************
  74  *           alloc_dc_ptr
  75  */
  76 DC *alloc_dc_ptr( const DC_FUNCTIONS *funcs, WORD magic )
  77 {
  78     HDC hdc;
  79     DC *dc;
  80
  81     if (!(dc = GDI_AllocObject( sizeof(*dc), magic, (HGDIOBJ*)&hdc, &dc_funcs ))) return NULL;
  82
  83     dc->hSelf               = hdc;
  84     dc->funcs               = funcs;
  85     dc->physDev             = NULL;
  86     dc->thread              = GetCurrentThreadId();
  87     dc->refcount            = 1;
  88     dc->dirty               = 0;
  89     dc->saveLevel           = 0;
  90     dc->saved_dc            = 0;
  91     dc->dwHookData          = 0;
  92     dc->hookProc            = NULL;
  93     dc->hookThunk           = NULL;
  94     dc->wndOrgX             = 0;
  95     dc->wndOrgY             = 0;
  96     dc->wndExtX             = 1;
  97     dc->wndExtY             = 1;
  98     dc->vportOrgX           = 0;
  99     dc->vportOrgY           = 0;
 100     dc->vportExtX           = 1;
 101     dc->vportExtY           = 1;
 102     dc->miterLimit          = 10.0f; /* 10.0 is the default, from MSDN */
 103     dc->flags               = 0;
 104     dc->layout              = 0;
 105     dc->hClipRgn            = 0;
 106     dc->hMetaRgn            = 0;
 107     dc->hMetaClipRgn        = 0;
 108     dc->hVisRgn             = 0;
 109     dc->hPen                = GetStockObject( BLACK_PEN );
 110     dc->hBrush              = GetStockObject( WHITE_BRUSH );
 111     dc->hFont               = GetStockObject( SYSTEM_FONT );
 112     dc->hBitmap             = 0;
 113     dc->hDevice             = 0;
 114     dc->hPalette            = GetStockObject( DEFAULT_PALETTE );
 115     dc->gdiFont             = 0;
 116     dc->ROPmode             = R2_COPYPEN;
 117     dc->polyFillMode        = ALTERNATE;
 118     dc->stretchBltMode      = BLACKONWHITE;
 119     dc->relAbsMode          = ABSOLUTE;
 120     dc->backgroundMode      = OPAQUE;
 121     dc->backgroundColor     = RGB( 255, 255, 255 );
 122     dc->dcBrushColor        = RGB( 255, 255, 255 );
 123     dc->dcPenColor          = RGB( 0, 0, 0 );
 124     dc->textColor           = RGB( 0, 0, 0 );
 125     dc->brushOrgX           = 0;
 126     dc->brushOrgY           = 0;
 127     dc->textAlign           = TA_LEFT | TA_TOP | TA_NOUPDATECP;
 128     dc->charExtra           = 0;
 129     dc->breakExtra          = 0;
 130     dc->breakRem            = 0;
 131     dc->MapMode             = MM_TEXT;
 132     dc->GraphicsMode        = GM_COMPATIBLE;
 133     dc->pAbortProc          = NULL;
 134     dc->CursPosX            = 0;
 135     dc->CursPosY            = 0;
 136     dc->ArcDirection        = AD_COUNTERCLOCKWISE;
 137     dc->xformWorld2Wnd.eM11 = 1.0f;
 138     dc->xformWorld2Wnd.eM12 = 0.0f;
 139     dc->xformWorld2Wnd.eM21 = 0.0f;
 140     dc->xformWorld2Wnd.eM22 = 1.0f;
 141     dc->xformWorld2Wnd.eDx  = 0.0f;
 142     dc->xformWorld2Wnd.eDy  = 0.0f;
 143     dc->xformWorld2Vport    = dc->xformWorld2Wnd;
 144     dc->xformVport2World    = dc->xformWorld2Wnd;
 145     dc->vport2WorldValid    = TRUE;
 146     dc->BoundsRect.left     = 0;
 147     dc->BoundsRect.top      = 0;
 148     dc->BoundsRect.right    = 0;
 149     dc->BoundsRect.bottom   = 0;
 150     dc->saved_visrgn        = NULL;
 151     PATH_InitGdiPath(&dc->path);
 152     GDI_ReleaseObj( dc->hSelf );
 153     return dc;
 154 }
 155
 156
 157
 158 /***********************************************************************
 159  *           free_dc_ptr
 160  */
 161 BOOL free_dc_ptr( DC *dc )
 162 {
 163     assert( dc->refcount == 1 );
 164     /* grab the gdi lock again */
 165     if (!GDI_GetObjPtr( dc->hSelf, MAGIC_DONTCARE )) return FALSE;  /* shouldn't happen */
 166     return GDI_FreeObject( dc->hSelf, dc );
 167 }
 168
 169
 170 /***********************************************************************
 171  *           get_dc_ptr
 172  *
 173  * Retrieve a DC pointer but release the GDI lock.
 174  */
 175 DC *get_dc_ptr( HDC hdc )
 176 {
 177     DC *dc = get_dc_obj( hdc );
 178     if (!dc) return NULL;
 179
 180     if (!InterlockedCompareExchange( &dc->refcount, 1, 0 ))
 181     {
 182         dc->thread = GetCurrentThreadId();
 183     }
 184     else if (dc->thread != GetCurrentThreadId())
 185     {
 186         WARN( "dc %p belongs to thread %04x\n", hdc, dc->thread );
 187         GDI_ReleaseObj( hdc );
 188         return NULL;
 189     }
 190     else InterlockedIncrement( &dc->refcount );
 191
 192     GDI_ReleaseObj( hdc );
 193     return dc;
 194 }
 195
 196
 197 /***********************************************************************
 198  *           release_dc_ptr
 199  */
 200 void release_dc_ptr( DC *dc )
 201 {
 202     LONG ref;
 203
 204     dc->thread = 0;
 205     ref = InterlockedDecrement( &dc->refcount );
 206     assert( ref >= 0 );
 207     if (ref) dc->thread = GetCurrentThreadId();  /* we still own it */
 208 }
 209
 210
 211 /***********************************************************************
 212  *           update_dc
 213  *
 214  * Make sure the DC vis region is up to date.
 215  * This function may call up to USER so the GDI lock should _not_
 216  * be held when calling it.
 217  */
 218 void update_dc( DC *dc )
 219 {
 220     if (InterlockedExchange( &dc->dirty, 0 ) && dc->hookThunk)
 221         dc->hookThunk( dc->hSelf, DCHC_INVALIDVISRGN, dc->dwHookData, 0 );
 222 }
 223
 224
 225 /***********************************************************************
 226  *           DC_DeleteObject
 227  */
 228 static BOOL DC_DeleteObject( HGDIOBJ handle, void *obj )
 229 {
 230     GDI_ReleaseObj( handle );
 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     FLOAT 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     FLOAT scaleX, scaleY;
 295
 296     /* Construct a transformation to do the window-to-viewport conversion */
 297     scaleX = (FLOAT)dc->vportExtX / (FLOAT)dc->wndExtX;
 298     scaleY = (FLOAT)dc->vportExtY / (FLOAT)dc->wndExtY;
 299     xformWnd2Vport.eM11 = scaleX;
 300     xformWnd2Vport.eM12 = 0.0;
 301     xformWnd2Vport.eM21 = 0.0;
 302     xformWnd2Vport.eM22 = scaleY;
 303     xformWnd2Vport.eDx  = (FLOAT)dc->vportOrgX -
 304         scaleX * (FLOAT)dc->wndOrgX;
 305     xformWnd2Vport.eDy  = (FLOAT)dc->vportOrgY -
 306         scaleY * (FLOAT)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     {
 321         SelectObject(dc->hSelf, GetCurrentObject(dc->hSelf, OBJ_FONT));
 322         SelectObject(dc->hSelf, GetCurrentObject(dc->hSelf, OBJ_PEN));
 323     }
 324 }
 325
 326
 327 /***********************************************************************
 328  *           GetDCState   (Not a Windows API)
 329  */
 330 HDC WINAPI GetDCState( HDC hdc )
 331 {
 332     DC * newdc, * dc;
 333     HGDIOBJ handle;
 334
 335     if (!(dc = get_dc_ptr( hdc ))) return 0;
 336     if (!(newdc = GDI_AllocObject( sizeof(DC), GDIMAGIC(dc->header.wMagic), &handle, &dc_funcs )))
 337     {
 338       release_dc_ptr( dc );
 339       return 0;
 340     }
 341     TRACE("(%p): returning %p\n", hdc, handle );
 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
 385     newdc->hSelf = (HDC)handle;
 386     newdc->thread    = GetCurrentThreadId();
 387     newdc->refcount  = 1;
 388     newdc->saveLevel = 0;
 389     newdc->saved_dc  = 0;
 390     GDI_ReleaseObj( handle );
 391
 392     PATH_InitGdiPath( &newdc->path );
 393
 394     newdc->pAbortProc = NULL;
 395     newdc->hookThunk  = NULL;
 396     newdc->hookProc   = 0;
 397     newdc->saved_visrgn = NULL;
 398
 399     /* Get/SetDCState() don't change hVisRgn field ("Undoc. Windows" p.559). */
 400
 401     newdc->hVisRgn      = 0;
 402     newdc->hClipRgn     = 0;
 403     newdc->hMetaRgn     = 0;
 404     newdc->hMetaClipRgn = 0;
 405     if (dc->hClipRgn)
 406     {
 407         newdc->hClipRgn = CreateRectRgn( 0, 0, 0, 0 );
 408         CombineRgn( newdc->hClipRgn, dc->hClipRgn, 0, RGN_COPY );
 409     }
 410     if (dc->hMetaRgn)
 411     {
 412         newdc->hMetaRgn = CreateRectRgn( 0, 0, 0, 0 );
 413         CombineRgn( newdc->hMetaRgn, dc->hMetaRgn, 0, RGN_COPY );
 414     }
 415     /* don't bother recomputing hMetaClipRgn, we'll do that in SetDCState */
 416
 417     if(dc->gdiFont) {
 418         newdc->gdiFont = dc->gdiFont;
 419     } else
 420         newdc->gdiFont = 0;
 421
 422     release_dc_ptr( newdc );
 423     release_dc_ptr( dc );
 424     return handle;
 425 }
 426
 427
 428 /***********************************************************************
 429  *           SetDCState   (Not a Windows API)
 430  */
 431 void WINAPI SetDCState( HDC hdc, HDC hdcs )
 432 {
 433     DC *dc, *dcs;
 434
 435     if (!(dc = get_dc_ptr( hdc ))) return;
 436     if (!(dcs = get_dc_ptr( hdcs )))
 437     {
 438         release_dc_ptr( dc );
 439         return;
 440     }
 441     if (!(dcs->flags & DC_SAVED))
 442     {
 443         release_dc_ptr( dc );
 444         release_dc_ptr( dcs );
 445         return;
 446     }
 447     TRACE("%p %p\n", hdc, hdcs );
 448
 449     update_dc( dc );
 450     dc->flags            = dcs->flags & ~DC_SAVED;
 451     dc->layout           = dcs->layout;
 452     dc->hDevice          = dcs->hDevice;
 453     dc->ROPmode          = dcs->ROPmode;
 454     dc->polyFillMode     = dcs->polyFillMode;
 455     dc->stretchBltMode   = dcs->stretchBltMode;
 456     dc->relAbsMode       = dcs->relAbsMode;
 457     dc->backgroundMode   = dcs->backgroundMode;
 458     dc->backgroundColor  = dcs->backgroundColor;
 459     dc->textColor        = dcs->textColor;
 460     dc->dcBrushColor     = dcs->dcBrushColor;
 461     dc->dcPenColor       = dcs->dcPenColor;
 462     dc->brushOrgX        = dcs->brushOrgX;
 463     dc->brushOrgY        = dcs->brushOrgY;
 464     dc->textAlign        = dcs->textAlign;
 465     dc->charExtra        = dcs->charExtra;
 466     dc->breakExtra       = dcs->breakExtra;
 467     dc->breakRem         = dcs->breakRem;
 468     dc->MapMode          = dcs->MapMode;
 469     dc->GraphicsMode     = dcs->GraphicsMode;
 470     dc->CursPosX         = dcs->CursPosX;
 471     dc->CursPosY         = dcs->CursPosY;
 472     dc->ArcDirection     = dcs->ArcDirection;
 473     dc->xformWorld2Wnd   = dcs->xformWorld2Wnd;
 474     dc->xformWorld2Vport = dcs->xformWorld2Vport;
 475     dc->xformVport2World = dcs->xformVport2World;
 476     dc->vport2WorldValid = dcs->vport2WorldValid;
 477     dc->BoundsRect       = dcs->BoundsRect;
 478
 479     dc->wndOrgX          = dcs->wndOrgX;
 480     dc->wndOrgY          = dcs->wndOrgY;
 481     dc->wndExtX          = dcs->wndExtX;
 482     dc->wndExtY          = dcs->wndExtY;
 483     dc->vportOrgX        = dcs->vportOrgX;
 484     dc->vportOrgY        = dcs->vportOrgY;
 485     dc->vportExtX        = dcs->vportExtX;
 486     dc->vportExtY        = dcs->vportExtY;
 487
 488     if (dcs->hClipRgn)
 489     {
 490         if (!dc->hClipRgn) dc->hClipRgn = CreateRectRgn( 0, 0, 0, 0 );
 491         CombineRgn( dc->hClipRgn, dcs->hClipRgn, 0, RGN_COPY );
 492     }
 493     else
 494     {
 495         if (dc->hClipRgn) DeleteObject( dc->hClipRgn );
 496         dc->hClipRgn = 0;
 497     }
 498     if (dcs->hMetaRgn)
 499     {
 500         if (!dc->hMetaRgn) dc->hMetaRgn = CreateRectRgn( 0, 0, 0, 0 );
 501         CombineRgn( dc->hMetaRgn, dcs->hMetaRgn, 0, RGN_COPY );
 502     }
 503     else
 504     {
 505         if (dc->hMetaRgn) DeleteObject( dc->hMetaRgn );
 506         dc->hMetaRgn = 0;
 507     }
 508     CLIPPING_UpdateGCRegion( dc );
 509
 510     SelectObject( hdc, dcs->hBitmap );
 511     SelectObject( hdc, dcs->hBrush );
 512     SelectObject( hdc, dcs->hFont );
 513     SelectObject( hdc, dcs->hPen );
 514     SetBkColor( hdc, dcs->backgroundColor);
 515     SetTextColor( hdc, dcs->textColor);
 516     GDISelectPalette( hdc, dcs->hPalette, FALSE );
 517     release_dc_ptr( dc );
 518     release_dc_ptr( dcs );
 519 }
 520
 521
 522 /***********************************************************************
 523  *           GetDCState   (GDI.179)
 524  */
 525 HDC16 WINAPI GetDCState16( HDC16 hdc )
 526 {
 527     return HDC_16( GetDCState( HDC_32(hdc) ));
 528 }
 529
 530
 531 /***********************************************************************
 532  *           SetDCState   (GDI.180)
 533  */
 534 void WINAPI SetDCState16( HDC16 hdc, HDC16 hdcs )
 535 {
 536     SetDCState( HDC_32(hdc), HDC_32(hdcs) );
 537 }
 538
 539
 540 /***********************************************************************
 541  *           SaveDC    (GDI32.@)
 542  */
 543 INT WINAPI SaveDC( HDC hdc )
 544 {
 545     HDC hdcs;
 546     DC * dc, * dcs;
 547     INT ret;
 548
 549     dc = get_dc_ptr( hdc );
 550     if (!dc) return 0;
 551
 552     if(dc->funcs->pSaveDC)
 553     {
 554         ret = dc->funcs->pSaveDC( dc->physDev );
 555         if(ret)
 556             ret = ++dc->saveLevel;
 557         release_dc_ptr( dc );
 558         return ret;
 559     }
 560
 561     if (!(hdcs = GetDCState( hdc )))
 562     {
 563         release_dc_ptr( dc );
 564         return 0;
 565     }
 566     dcs = get_dc_ptr( hdcs );
 567
 568     /* Copy path. The reason why path saving / restoring is in SaveDC/
 569      * RestoreDC and not in GetDCState/SetDCState is that the ...DCState
 570      * functions are only in Win16 (which doesn't have paths) and that
 571      * SetDCState doesn't allow us to signal an error (which can happen
 572      * when copying paths).
 573      */
 574     if (!PATH_AssignGdiPath( &dcs->path, &dc->path ))
 575     {
 576         release_dc_ptr( dc );
 577         release_dc_ptr( dcs );
 578         DeleteDC( hdcs );
 579         return 0;
 580     }
 581
 582     dcs->saved_dc = dc->saved_dc;
 583     dc->saved_dc = hdcs;
 584     TRACE("(%p): returning %d\n", hdc, dc->saveLevel+1 );
 585     ret = ++dc->saveLevel;
 586     release_dc_ptr( dcs );
 587     release_dc_ptr( dc );
 588     return ret;
 589 }
 590
 591
 592 /***********************************************************************
 593  *           RestoreDC    (GDI32.@)
 594  */
 595 BOOL WINAPI RestoreDC( HDC hdc, INT level )
 596 {
 597     DC * dc, * dcs;
 598     BOOL success;
 599
 600     TRACE("%p %d\n", hdc, level );
 601     if (!(dc = get_dc_ptr( hdc ))) return FALSE;
 602
 603     if(abs(level) > dc->saveLevel || level == 0)
 604     {
 605         release_dc_ptr( dc );
 606         return FALSE;
 607     }
 608
 609     update_dc( dc );
 610
 611     if(dc->funcs->pRestoreDC)
 612     {
 613         success = dc->funcs->pRestoreDC( dc->physDev, level );
 614         if(level < 0) level = dc->saveLevel + level + 1;
 615         if(success)
 616             dc->saveLevel = level - 1;
 617         release_dc_ptr( dc );
 618         return success;
 619     }
 620
 621     if (level < 0) level = dc->saveLevel + level + 1;
 622     success=TRUE;
 623     while (dc->saveLevel >= level)
 624     {
 625         HDC hdcs = dc->saved_dc;
 626         if (!(dcs = get_dc_ptr( hdcs )))
 627         {
 628             success = FALSE;
 629             break;
 630         }
 631         dc->saved_dc = dcs->saved_dc;
 632         dcs->saved_dc = 0;
 633         if (--dc->saveLevel < level)
 634         {
 635             SetDCState( hdc, hdcs );
 636             if (!PATH_AssignGdiPath( &dc->path, &dcs->path ))
 637                 /* FIXME: This might not be quite right, since we're
 638                  * returning FALSE but still destroying the saved DC state */
 639                 success=FALSE;
 640         }
 641         release_dc_ptr( dcs );
 642         DeleteDC( hdcs );
 643     }
 644     release_dc_ptr( dc );
 645     return success;
 646 }
 647
 648
 649 /***********************************************************************
 650  *           CreateDCW    (GDI32.@)
 651  */
 652 HDC WINAPI CreateDCW( LPCWSTR driver, LPCWSTR device, LPCWSTR output,
 653                       const DEVMODEW *initData )
 654 {
 655     HDC hdc;
 656     DC * dc;
 657     const DC_FUNCTIONS *funcs;
 658     WCHAR buf[300];
 659
 660     GDI_CheckNotLock();
 661
 662     if (!device || !DRIVER_GetDriverName( device, buf, 300 ))
 663     {
 664         if (!driver)
 665         {
 666             ERR( "no device found for %s\n", debugstr_w(device) );
 667             return 0;
 668         }
 669         strcpyW(buf, driver);
 670     }
 671
 672     if (!(funcs = DRIVER_load_driver( buf )))
 673     {
 674         ERR( "no driver found for %s\n", debugstr_w(buf) );
 675         return 0;
 676     }
 677     if (!(dc = alloc_dc_ptr( funcs, DC_MAGIC ))) goto error;
 678     hdc = dc->hSelf;
 679
 680     dc->hBitmap = GetStockObject( DEFAULT_BITMAP );
 681     if (!(dc->hVisRgn = CreateRectRgn( 0, 0, 1, 1 ))) goto error;
 682
 683     TRACE("(driver=%s, device=%s, output=%s): returning %p\n",
 684           debugstr_w(driver), debugstr_w(device), debugstr_w(output), dc->hSelf );
 685
 686     if (dc->funcs->pCreateDC &&
 687         !dc->funcs->pCreateDC( hdc, &dc->physDev, buf, device, output, initData ))
 688     {
 689         WARN("creation aborted by device\n" );
 690         goto error;
 691     }
 692
 693     SetRectRgn( dc->hVisRgn, 0, 0,
 694                 GetDeviceCaps( hdc, DESKTOPHORZRES ), GetDeviceCaps( hdc, DESKTOPVERTRES ) );
 695
 696     DC_InitDC( dc );
 697     release_dc_ptr( dc );
 698     return hdc;
 699
 700 error:
 701     if (dc && dc->hVisRgn) DeleteObject( dc->hVisRgn );
 702     if (dc) free_dc_ptr( dc );
 703     DRIVER_release_driver( funcs );
 704     return 0;
 705 }
 706
 707
 708 /***********************************************************************
 709  *           CreateDCA    (GDI32.@)
 710  */
 711 HDC WINAPI CreateDCA( LPCSTR driver, LPCSTR device, LPCSTR output,
 712                       const DEVMODEA *initData )
 713 {
 714     UNICODE_STRING driverW, deviceW, outputW;
 715     DEVMODEW *initDataW;
 716     HDC ret;
 717
 718     if (driver) RtlCreateUnicodeStringFromAsciiz(&driverW, driver);
 719     else driverW.Buffer = NULL;
 720
 721     if (device) RtlCreateUnicodeStringFromAsciiz(&deviceW, device);
 722     else deviceW.Buffer = NULL;
 723
 724     if (output) RtlCreateUnicodeStringFromAsciiz(&outputW, output);
 725     else outputW.Buffer = NULL;
 726
 727     initDataW = NULL;
 728     if (initData)
 729     {
 730         /* don't convert initData for DISPLAY driver, it's not used */
 731         if (!driverW.Buffer || strcmpiW( driverW.Buffer, displayW ))
 732             initDataW = GdiConvertToDevmodeW(initData);
 733     }
 734
 735     ret = CreateDCW( driverW.Buffer, deviceW.Buffer, outputW.Buffer, initDataW );
 736
 737     RtlFreeUnicodeString(&driverW);
 738     RtlFreeUnicodeString(&deviceW);
 739     RtlFreeUnicodeString(&outputW);
 740     HeapFree(GetProcessHeap(), 0, initDataW);
 741     return ret;
 742 }
 743
 744
 745 /***********************************************************************
 746  *           CreateICA    (GDI32.@)
 747  */
 748 HDC WINAPI CreateICA( LPCSTR driver, LPCSTR device, LPCSTR output,
 749                           const DEVMODEA* initData )
 750 {
 751       /* Nothing special yet for ICs */
 752     return CreateDCA( driver, device, output, initData );
 753 }
 754
 755
 756 /***********************************************************************
 757  *           CreateICW    (GDI32.@)
 758  */
 759 HDC WINAPI CreateICW( LPCWSTR driver, LPCWSTR device, LPCWSTR output,
 760                           const DEVMODEW* initData )
 761 {
 762       /* Nothing special yet for ICs */
 763     return CreateDCW( driver, device, output, initData );
 764 }
 765
 766
 767 /***********************************************************************
 768  *           CreateCompatibleDC   (GDI32.@)
 769  */
 770 HDC WINAPI CreateCompatibleDC( HDC hdc )
 771 {
 772     DC *dc, *origDC;
 773     HDC ret;
 774     const DC_FUNCTIONS *funcs = NULL;
 775     PHYSDEV physDev = NULL;
 776
 777     GDI_CheckNotLock();
 778
 779     if ((origDC = get_dc_ptr( hdc )))
 780     {
 781         if (GetObjectType( hdc ) == OBJ_DC)
 782         {
 783             funcs = origDC->funcs;
 784             physDev = origDC->physDev;
 785         }
 786         release_dc_ptr( origDC );
 787         if (funcs) funcs = DRIVER_get_driver( funcs );
 788     }
 789
 790     if (!funcs && !(funcs = DRIVER_load_driver( displayW ))) return 0;
 791
 792     if (!(dc = alloc_dc_ptr( funcs, MEMORY_DC_MAGIC ))) goto error;
 793
 794     TRACE("(%p): returning %p\n", hdc, dc->hSelf );
 795
 796     dc->hBitmap = GetStockObject( DEFAULT_BITMAP );
 797     if (!(dc->hVisRgn = CreateRectRgn( 0, 0, 1, 1 ))) goto error;   /* default bitmap is 1x1 */
 798
 799     /* Copy the driver-specific physical device info into
 800      * the new DC. The driver may use this read-only info
 801      * while creating the compatible DC below. */
 802     dc->physDev = physDev;
 803     ret = dc->hSelf;
 804
 805     if (dc->funcs->pCreateDC &&
 806         !dc->funcs->pCreateDC( dc->hSelf, &dc->physDev, NULL, NULL, NULL, NULL ))
 807     {
 808         WARN("creation aborted by device\n");
 809         goto error;
 810     }
 811
 812     DC_InitDC( dc );
 813     release_dc_ptr( dc );
 814     return ret;
 815
 816 error:
 817     if (dc && dc->hVisRgn) DeleteObject( dc->hVisRgn );
 818     if (dc) free_dc_ptr( dc );
 819     DRIVER_release_driver( funcs );
 820     return 0;
 821 }
 822
 823
 824 /***********************************************************************
 825  *           DeleteDC    (GDI32.@)
 826  */
 827 BOOL WINAPI DeleteDC( HDC hdc )
 828 {
 829     const DC_FUNCTIONS *funcs = NULL;
 830     DC * dc;
 831
 832     TRACE("%p\n", hdc );
 833
 834     GDI_CheckNotLock();
 835
 836     if (!(dc = get_dc_ptr( hdc ))) return FALSE;
 837     if (dc->refcount != 1)
 838     {
 839         FIXME( "not deleting busy DC %p refcount %u\n", dc->hSelf, dc->refcount );
 840         release_dc_ptr( dc );
 841         return FALSE;
 842     }
 843
 844     /* Call hook procedure to check whether is it OK to delete this DC */
 845     if (dc->hookThunk && !dc->hookThunk( hdc, DCHC_DELETEDC, dc->dwHookData, 0 ))
 846     {
 847         release_dc_ptr( dc );
 848         return FALSE;
 849     }
 850
 851     while (dc->saveLevel)
 852     {
 853         DC * dcs;
 854         HDC hdcs = dc->saved_dc;
 855         if (!(dcs = get_dc_ptr( hdcs ))) break;
 856         dc->saved_dc = dcs->saved_dc;
 857         dc->saveLevel--;
 858         if (dcs->hClipRgn) DeleteObject( dcs->hClipRgn );
 859         if (dcs->hMetaRgn) DeleteObject( dcs->hMetaRgn );
 860         if (dcs->hMetaClipRgn) DeleteObject( dcs->hMetaClipRgn );
 861         if (dcs->hVisRgn) DeleteObject( dcs->hVisRgn );
 862         PATH_DestroyGdiPath(&dcs->path);
 863         free_dc_ptr( dcs );
 864     }
 865
 866     if (!(dc->flags & DC_SAVED))
 867     {
 868         SelectObject( hdc, GetStockObject(BLACK_PEN) );
 869         SelectObject( hdc, GetStockObject(WHITE_BRUSH) );
 870         SelectObject( hdc, GetStockObject(SYSTEM_FONT) );
 871         SelectObject( hdc, GetStockObject(DEFAULT_BITMAP) );
 872         funcs = dc->funcs;
 873         if (dc->funcs->pDeleteDC) dc->funcs->pDeleteDC(dc->physDev);
 874         dc->physDev = NULL;
 875     }
 876
 877     while (dc->saved_visrgn)
 878     {
 879         struct saved_visrgn *next = dc->saved_visrgn->next;
 880         DeleteObject( dc->saved_visrgn->hrgn );
 881         HeapFree( GetProcessHeap(), 0, dc->saved_visrgn );
 882         dc->saved_visrgn = next;
 883     }
 884     if (dc->hClipRgn) DeleteObject( dc->hClipRgn );
 885     if (dc->hMetaRgn) DeleteObject( dc->hMetaRgn );
 886     if (dc->hMetaClipRgn) DeleteObject( dc->hMetaClipRgn );
 887     if (dc->hVisRgn) DeleteObject( dc->hVisRgn );
 888     PATH_DestroyGdiPath(&dc->path);
 889
 890     free_dc_ptr( dc );
 891     if (funcs) DRIVER_release_driver( funcs );  /* do that after releasing the GDI lock */
 892     return TRUE;
 893 }
 894
 895
 896 /***********************************************************************
 897  *           ResetDCW    (GDI32.@)
 898  */
 899 HDC WINAPI ResetDCW( HDC hdc, const DEVMODEW *devmode )
 900 {
 901     DC *dc;
 902     HDC ret = hdc;
 903
 904     if ((dc = get_dc_ptr( hdc )))
 905     {
 906         if (dc->funcs->pResetDC) ret = dc->funcs->pResetDC( dc->physDev, devmode );
 907         release_dc_ptr( dc );
 908     }
 909     return ret;
 910 }
 911
 912
 913 /***********************************************************************
 914  *           ResetDCA    (GDI32.@)
 915  */
 916 HDC WINAPI ResetDCA( HDC hdc, const DEVMODEA *devmode )
 917 {
 918     DEVMODEW *devmodeW;
 919     HDC ret;
 920
 921     if (devmode) devmodeW = GdiConvertToDevmodeW(devmode);
 922     else devmodeW = NULL;
 923
 924     ret = ResetDCW(hdc, devmodeW);
 925
 926     HeapFree(GetProcessHeap(), 0, devmodeW);
 927     return ret;
 928 }
 929
 930
 931 /***********************************************************************
 932  *           GetDeviceCaps    (GDI32.@)
 933  */
 934 INT WINAPI GetDeviceCaps( HDC hdc, INT cap )
 935 {
 936     DC *dc;
 937     INT ret = 0;
 938
 939     if ((dc = get_dc_ptr( hdc )))
 940     {
 941         if (dc->funcs->pGetDeviceCaps) ret = dc->funcs->pGetDeviceCaps( dc->physDev, cap );
 942         else switch(cap)  /* return meaningful values for some entries */
 943         {
 944         case HORZRES:     ret = 640; break;
 945         case VERTRES:     ret = 480; break;
 946         case BITSPIXEL:   ret = 1; break;
 947         case PLANES:      ret = 1; break;
 948         case NUMCOLORS:   ret = 2; break;
 949         case ASPECTX:     ret = 36; break;
 950         case ASPECTY:     ret = 36; break;
 951         case ASPECTXY:    ret = 51; break;
 952         case LOGPIXELSX:  ret = 72; break;
 953         case LOGPIXELSY:  ret = 72; break;
 954         case SIZEPALETTE: ret = 2; break;
 955         }
 956         release_dc_ptr( dc );
 957     }
 958     return ret;
 959 }
 960
 961
 962 /***********************************************************************
 963  *              GetBkColor (GDI32.@)
 964  */
 965 COLORREF WINAPI GetBkColor( HDC hdc )
 966 {
 967     COLORREF ret = 0;
 968     DC * dc = get_dc_ptr( hdc );
 969     if (dc)
 970     {
 971         ret = dc->backgroundColor;
 972         release_dc_ptr( dc );
 973     }
 974     return ret;
 975 }
 976
 977
 978 /***********************************************************************
 979  *           SetBkColor    (GDI32.@)
 980  */
 981 COLORREF WINAPI SetBkColor( HDC hdc, COLORREF color )
 982 {
 983     COLORREF oldColor;
 984     DC * dc = get_dc_ptr( hdc );
 985
 986     TRACE("hdc=%p color=0x%08x\n", hdc, color);
 987
 988     if (!dc) return CLR_INVALID;
 989     oldColor = dc->backgroundColor;
 990     if (dc->funcs->pSetBkColor)
 991     {
 992         color = dc->funcs->pSetBkColor(dc->physDev, color);
 993         if (color == CLR_INVALID)  /* don't change it */
 994         {
 995             color = oldColor;
 996             oldColor = CLR_INVALID;
 997         }
 998     }
 999     dc->backgroundColor = color;
1000     release_dc_ptr( dc );
1001     return oldColor;
1002 }
1003
1004
1005 /***********************************************************************
1006  *              GetTextColor (GDI32.@)
1007  */
1008 COLORREF WINAPI GetTextColor( HDC hdc )
1009 {
1010     COLORREF ret = 0;
1011     DC * dc = get_dc_ptr( hdc );
1012     if (dc)
1013     {
1014         ret = dc->textColor;
1015         release_dc_ptr( dc );
1016     }
1017     return ret;
1018 }
1019
1020
1021 /***********************************************************************
1022  *           SetTextColor    (GDI32.@)
1023  */
1024 COLORREF WINAPI SetTextColor( HDC hdc, COLORREF color )
1025 {
1026     COLORREF oldColor;
1027     DC * dc = get_dc_ptr( hdc );
1028
1029     TRACE(" hdc=%p color=0x%08x\n", hdc, color);
1030
1031     if (!dc) return CLR_INVALID;
1032     oldColor = dc->textColor;
1033     if (dc->funcs->pSetTextColor)
1034     {
1035         color = dc->funcs->pSetTextColor(dc->physDev, color);
1036         if (color == CLR_INVALID)  /* don't change it */
1037         {
1038             color = oldColor;
1039             oldColor = CLR_INVALID;
1040         }
1041     }
1042     dc->textColor = color;
1043     release_dc_ptr( dc );
1044     return oldColor;
1045 }
1046
1047
1048 /***********************************************************************
1049  *              GetTextAlign (GDI32.@)
1050  */
1051 UINT WINAPI GetTextAlign( HDC hdc )
1052 {
1053     UINT ret = 0;
1054     DC * dc = get_dc_ptr( hdc );
1055     if (dc)
1056     {
1057         ret = dc->textAlign;
1058         release_dc_ptr( dc );
1059     }
1060     return ret;
1061 }
1062
1063
1064 /***********************************************************************
1065  *           SetTextAlign    (GDI32.@)
1066  */
1067 UINT WINAPI SetTextAlign( HDC hdc, UINT align )
1068 {
1069     UINT ret;
1070     DC *dc = get_dc_ptr( hdc );
1071
1072     TRACE("hdc=%p align=%d\n", hdc, align);
1073
1074     if (!dc) return 0x0;
1075     ret = dc->textAlign;
1076     if (dc->funcs->pSetTextAlign)
1077         if (!dc->funcs->pSetTextAlign(dc->physDev, align))
1078             ret = GDI_ERROR;
1079     if (ret != GDI_ERROR)
1080         dc->textAlign = align;
1081     release_dc_ptr( dc );
1082     return ret;
1083 }
1084
1085 /***********************************************************************
1086  *           GetDCOrgEx  (GDI32.@)
1087  */
1088 BOOL WINAPI GetDCOrgEx( HDC hDC, LPPOINT lpp )
1089 {
1090     DC * dc;
1091
1092     if (!lpp) return FALSE;
1093     if (!(dc = get_dc_ptr( hDC ))) return FALSE;
1094
1095     lpp->x = lpp->y = 0;
1096     if (dc->funcs->pGetDCOrgEx) dc->funcs->pGetDCOrgEx( dc->physDev, lpp );
1097     release_dc_ptr( dc );
1098     return TRUE;
1099 }
1100
1101
1102 /***********************************************************************
1103  *           SetDCOrg   (GDI.117)
1104  */
1105 DWORD WINAPI SetDCOrg16( HDC16 hdc16, INT16 x, INT16 y )
1106 {
1107     DWORD prevOrg = 0;
1108     HDC hdc = HDC_32( hdc16 );
1109     DC *dc = get_dc_ptr( hdc );
1110     if (!dc) return 0;
1111     if (dc->funcs->pSetDCOrg) prevOrg = dc->funcs->pSetDCOrg( dc->physDev, x, y );
1112     release_dc_ptr( dc );
1113     return prevOrg;
1114 }
1115
1116
1117 /***********************************************************************
1118  *              GetGraphicsMode (GDI32.@)
1119  */
1120 INT WINAPI GetGraphicsMode( HDC hdc )
1121 {
1122     INT ret = 0;
1123     DC * dc = get_dc_ptr( hdc );
1124     if (dc)
1125     {
1126         ret = dc->GraphicsMode;
1127         release_dc_ptr( dc );
1128     }
1129     return ret;
1130 }
1131
1132
1133 /***********************************************************************
1134  *           SetGraphicsMode    (GDI32.@)
1135  */
1136 INT WINAPI SetGraphicsMode( HDC hdc, INT mode )
1137 {
1138     INT ret = 0;
1139     DC *dc = get_dc_ptr( hdc );
1140
1141     /* One would think that setting the graphics mode to GM_COMPATIBLE
1142      * would also reset the world transformation matrix to the unity
1143      * matrix. However, in Windows, this is not the case. This doesn't
1144      * make a lot of sense to me, but that's the way it is.
1145      */
1146     if (!dc) return 0;
1147     if ((mode > 0) && (mode <= GM_LAST))
1148     {
1149         ret = dc->GraphicsMode;
1150         dc->GraphicsMode = mode;
1151     }
1152     release_dc_ptr( dc );
1153     return ret;
1154 }
1155
1156
1157 /***********************************************************************
1158  *              GetArcDirection (GDI32.@)
1159  */
1160 INT WINAPI GetArcDirection( HDC hdc )
1161 {
1162     INT ret = 0;
1163     DC * dc = get_dc_ptr( hdc );
1164     if (dc)
1165     {
1166         ret = dc->ArcDirection;
1167         release_dc_ptr( dc );
1168     }
1169     return ret;
1170 }
1171
1172
1173 /***********************************************************************
1174  *           SetArcDirection    (GDI32.@)
1175  */
1176 INT WINAPI SetArcDirection( HDC hdc, INT nDirection )
1177 {
1178     DC * dc;
1179     INT nOldDirection = 0;
1180
1181     if (nDirection!=AD_COUNTERCLOCKWISE && nDirection!=AD_CLOCKWISE)
1182     {
1183         SetLastError(ERROR_INVALID_PARAMETER);
1184         return 0;
1185     }
1186
1187     if ((dc = get_dc_ptr( hdc )))
1188     {
1189         if (dc->funcs->pSetArcDirection)
1190         {
1191             dc->funcs->pSetArcDirection(dc->physDev, nDirection);
1192         }
1193         nOldDirection = dc->ArcDirection;
1194         dc->ArcDirection = nDirection;
1195         release_dc_ptr( dc );
1196     }
1197     return nOldDirection;
1198 }
1199
1200
1201 /***********************************************************************
1202  *           GetWorldTransform    (GDI32.@)
1203  */
1204 BOOL WINAPI GetWorldTransform( HDC hdc, LPXFORM xform )
1205 {
1206     DC * dc;
1207     if (!xform) return FALSE;
1208     if (!(dc = get_dc_ptr( hdc ))) return FALSE;
1209     *xform = dc->xformWorld2Wnd;
1210     release_dc_ptr( dc );
1211     return TRUE;
1212 }
1213
1214
1215 /***********************************************************************
1216  *           GetTransform    (GDI32.@)
1217  */
1218 BOOL WINAPI GetTransform( HDC hdc, DWORD unknown, LPXFORM xform )
1219 {
1220     if (unknown == 0x0203) return GetWorldTransform( hdc, xform );
1221     FIXME("stub: don't know what to do for code %x\n", unknown );
1222     return FALSE;
1223 }
1224
1225
1226 /***********************************************************************
1227  *           SetWorldTransform    (GDI32.@)
1228  */
1229 BOOL WINAPI SetWorldTransform( HDC hdc, const XFORM *xform )
1230 {
1231     BOOL ret = FALSE;
1232     DC *dc = get_dc_ptr( hdc );
1233
1234     if (!dc) return FALSE;
1235     if (!xform) goto done;
1236
1237     /* Check that graphics mode is GM_ADVANCED */
1238     if (dc->GraphicsMode!=GM_ADVANCED) goto done;
1239
1240     if (dc->funcs->pSetWorldTransform)
1241     {
1242         ret = dc->funcs->pSetWorldTransform(dc->physDev, xform);
1243         if (!ret) goto done;
1244     }
1245
1246     dc->xformWorld2Wnd = *xform;
1247     DC_UpdateXforms( dc );
1248     ret = TRUE;
1249  done:
1250     release_dc_ptr( dc );
1251     return ret;
1252 }
1253
1254
1255 /****************************************************************************
1256  * ModifyWorldTransform [GDI32.@]
1257  * Modifies the world transformation for a device context.
1258  *
1259  * PARAMS
1260  *    hdc   [I] Handle to device context
1261  *    xform [I] XFORM structure that will be used to modify the world
1262  *              transformation
1263  *    iMode [I] Specifies in what way to modify the world transformation
1264  *              Possible values:
1265  *              MWT_IDENTITY
1266  *                 Resets the world transformation to the identity matrix.
1267  *                 The parameter xform is ignored.
1268  *              MWT_LEFTMULTIPLY
1269  *                 Multiplies xform into the world transformation matrix from
1270  *                 the left.
1271  *              MWT_RIGHTMULTIPLY
1272  *                 Multiplies xform into the world transformation matrix from
1273  *                 the right.
1274  *
1275  * RETURNS
1276  *  Success: TRUE.
1277  *  Failure: FALSE. Use GetLastError() to determine the cause.
1278  */
1279 BOOL WINAPI ModifyWorldTransform( HDC hdc, const XFORM *xform,
1280     DWORD iMode )
1281 {
1282     BOOL ret = FALSE;
1283     DC *dc = get_dc_ptr( hdc );
1284
1285     /* Check for illegal parameters */
1286     if (!dc) return FALSE;
1287     if (!xform && iMode != MWT_IDENTITY) goto done;
1288
1289     /* Check that graphics mode is GM_ADVANCED */
1290     if (dc->GraphicsMode!=GM_ADVANCED) goto done;
1291
1292     if (dc->funcs->pModifyWorldTransform)
1293     {
1294         ret = dc->funcs->pModifyWorldTransform(dc->physDev, xform, iMode);
1295         if (!ret) goto done;
1296     }
1297
1298     switch (iMode)
1299     {
1300         case MWT_IDENTITY:
1301             dc->xformWorld2Wnd.eM11 = 1.0f;
1302             dc->xformWorld2Wnd.eM12 = 0.0f;
1303             dc->xformWorld2Wnd.eM21 = 0.0f;
1304             dc->xformWorld2Wnd.eM22 = 1.0f;
1305             dc->xformWorld2Wnd.eDx  = 0.0f;
1306             dc->xformWorld2Wnd.eDy  = 0.0f;
1307             break;
1308         case MWT_LEFTMULTIPLY:
1309             CombineTransform( &dc->xformWorld2Wnd, xform,
1310                 &dc->xformWorld2Wnd );
1311             break;
1312         case MWT_RIGHTMULTIPLY:
1313             CombineTransform( &dc->xformWorld2Wnd, &dc->xformWorld2Wnd,
1314                 xform );
1315             break;
1316         default:
1317             goto done;
1318     }
1319
1320     DC_UpdateXforms( dc );
1321     ret = TRUE;
1322  done:
1323     release_dc_ptr( dc );
1324     return ret;
1325 }
1326
1327
1328 /****************************************************************************
1329  * CombineTransform [GDI32.@]
1330  * Combines two transformation matrices.
1331  *
1332  * PARAMS
1333  *    xformResult [O] Stores the result of combining the two matrices
1334  *    xform1      [I] Specifies the first matrix to apply
1335  *    xform2      [I] Specifies the second matrix to apply
1336  *
1337  * REMARKS
1338  *    The same matrix can be passed in for more than one of the parameters.
1339  *
1340  * RETURNS
1341  *  Success: TRUE.
1342  *  Failure: FALSE. Use GetLastError() to determine the cause.
1343  */
1344 BOOL WINAPI CombineTransform( LPXFORM xformResult, const XFORM *xform1,
1345     const XFORM *xform2 )
1346 {
1347     XFORM xformTemp;
1348
1349     /* Check for illegal parameters */
1350     if (!xformResult || !xform1 || !xform2)
1351         return FALSE;
1352
1353     /* Create the result in a temporary XFORM, since xformResult may be
1354      * equal to xform1 or xform2 */
1355     xformTemp.eM11 = xform1->eM11 * xform2->eM11 +
1356                      xform1->eM12 * xform2->eM21;
1357     xformTemp.eM12 = xform1->eM11 * xform2->eM12 +
1358                      xform1->eM12 * xform2->eM22;
1359     xformTemp.eM21 = xform1->eM21 * xform2->eM11 +
1360                      xform1->eM22 * xform2->eM21;
1361     xformTemp.eM22 = xform1->eM21 * xform2->eM12 +
1362                      xform1->eM22 * xform2->eM22;
1363     xformTemp.eDx  = xform1->eDx  * xform2->eM11 +
1364                      xform1->eDy  * xform2->eM21 +
1365                      xform2->eDx;
1366     xformTemp.eDy  = xform1->eDx  * xform2->eM12 +
1367                      xform1->eDy  * xform2->eM22 +
1368                      xform2->eDy;
1369
1370     /* Copy the result to xformResult */
1371     *xformResult = xformTemp;
1372
1373     return TRUE;
1374 }
1375
1376
1377 /***********************************************************************
1378  *           SetDCHook   (GDI32.@)
1379  *
1380  * Note: this doesn't exist in Win32, we add it here because user32 needs it.
1381  */
1382 BOOL WINAPI SetDCHook( HDC hdc, DCHOOKPROC hookProc, DWORD_PTR dwHookData )
1383 {
1384     DC *dc = get_dc_ptr( hdc );
1385
1386     if (!dc) return FALSE;
1387
1388     if (!(dc->flags & DC_SAVED))
1389     {
1390         dc->dwHookData = dwHookData;
1391         dc->hookThunk = hookProc;
1392     }
1393     release_dc_ptr( dc );
1394     return TRUE;
1395 }
1396
1397
1398 /***********************************************************************
1399  *           GetDCHook   (GDI32.@)
1400  *
1401  * Note: this doesn't exist in Win32, we add it here because user32 needs it.
1402  */
1403 DWORD_PTR WINAPI GetDCHook( HDC hdc, DCHOOKPROC *proc )
1404 {
1405     DC *dc = get_dc_ptr( hdc );
1406     DWORD_PTR ret;
1407
1408     if (!dc) return 0;
1409     if (proc) *proc = dc->hookThunk;
1410     ret = dc->dwHookData;
1411     release_dc_ptr( dc );
1412     return ret;
1413 }
1414
1415
1416 /* relay function to call the 16-bit DC hook proc */
1417 static BOOL WINAPI call_dc_hook16( HDC hdc, WORD code, DWORD_PTR data, LPARAM lParam )
1418 {
1419     WORD args[6];
1420     DWORD ret = 0;
1421     DC *dc = get_dc_ptr( hdc );
1422
1423     if (!dc) return FALSE;
1424     if (dc->hookProc)
1425     {
1426         args[5] = HDC_16(hdc);
1427         args[4] = code;
1428         args[3] = HIWORD(data);
1429         args[2] = LOWORD(data);
1430         args[1] = HIWORD(lParam);
1431         args[0] = LOWORD(lParam);
1432         WOWCallback16Ex( (DWORD)dc->hookProc, WCB16_PASCAL, sizeof(args), args, &ret );
1433     }
1434     release_dc_ptr( dc );
1435     return LOWORD(ret);
1436 }
1437
1438 /***********************************************************************
1439  *           SetDCHook   (GDI.190)
1440  */
1441 BOOL16 WINAPI SetDCHook16( HDC16 hdc16, FARPROC16 hookProc, DWORD dwHookData )
1442 {
1443     DC *dc = get_dc_ptr( HDC_32(hdc16) );
1444
1445     if (!dc) return FALSE;
1446     if (!(dc->flags & DC_SAVED))
1447     {
1448         dc->dwHookData = dwHookData;
1449         dc->hookThunk = call_dc_hook16;
1450         dc->hookProc = hookProc;
1451     }
1452     release_dc_ptr( dc );
1453     return TRUE;
1454 }
1455
1456
1457 /***********************************************************************
1458  *           GetDCHook   (GDI.191)
1459  */
1460 DWORD WINAPI GetDCHook16( HDC16 hdc16, FARPROC16 *phookProc )
1461 {
1462     HDC hdc = HDC_32( hdc16 );
1463     DC *dc = get_dc_ptr( hdc );
1464     DWORD ret;
1465
1466     if (!dc) return 0;
1467     *phookProc = dc->hookProc;
1468     ret = dc->dwHookData;
1469     release_dc_ptr( dc );
1470     return ret;
1471 }
1472
1473
1474 /***********************************************************************
1475  *           SetHookFlags   (GDI32.@)
1476  *
1477  * Note: this doesn't exist in Win32, we add it here because user32 needs it.
1478  */
1479 WORD WINAPI SetHookFlags( HDC hdc, WORD flags )
1480 {
1481     DC *dc = get_dc_obj( hdc );  /* not get_dc_ptr, this needs to work from any thread */
1482     LONG ret = 0;
1483
1484     if (!dc) return 0;
1485
1486     /* "Undocumented Windows" info is slightly confusing. */
1487
1488     TRACE("hDC %p, flags %04x\n",hdc,flags);
1489
1490     if (flags & DCHF_INVALIDATEVISRGN)
1491         ret = InterlockedExchange( &dc->dirty, 1 );
1492     else if (flags & DCHF_VALIDATEVISRGN || !flags)
1493         ret = InterlockedExchange( &dc->dirty, 0 );
1494
1495     GDI_ReleaseObj( dc );
1496     return ret;
1497 }
1498
1499 /***********************************************************************
1500  *           SetICMMode    (GDI32.@)
1501  */
1502 INT WINAPI SetICMMode(HDC hdc, INT iEnableICM)
1503 {
1504 /*FIXME  Asuming that ICM is always off, and cannot be turned on */
1505     if (iEnableICM == ICM_OFF) return ICM_OFF;
1506     if (iEnableICM == ICM_ON) return 0;
1507     if (iEnableICM == ICM_QUERY) return ICM_OFF;
1508     return 0;
1509 }
1510
1511 /***********************************************************************
1512  *           GetDeviceGammaRamp    (GDI32.@)
1513  */
1514 BOOL WINAPI GetDeviceGammaRamp(HDC hDC, LPVOID ptr)
1515 {
1516     BOOL ret = FALSE;
1517     DC *dc = get_dc_ptr( hDC );
1518
1519     if( dc )
1520     {
1521         if (dc->funcs->pGetDeviceGammaRamp)
1522             ret = dc->funcs->pGetDeviceGammaRamp(dc->physDev, ptr);
1523         release_dc_ptr( dc );
1524     }
1525     return ret;
1526 }
1527
1528 /***********************************************************************
1529  *           SetDeviceGammaRamp    (GDI32.@)
1530  */
1531 BOOL WINAPI SetDeviceGammaRamp(HDC hDC, LPVOID ptr)
1532 {
1533     BOOL ret = FALSE;
1534     DC *dc = get_dc_ptr( hDC );
1535
1536     if( dc )
1537     {
1538         if (dc->funcs->pSetDeviceGammaRamp)
1539             ret = dc->funcs->pSetDeviceGammaRamp(dc->physDev, ptr);
1540         release_dc_ptr( dc );
1541     }
1542     return ret;
1543 }
1544
1545 /***********************************************************************
1546  *           GetColorSpace    (GDI32.@)
1547  */
1548 HCOLORSPACE WINAPI GetColorSpace(HDC hdc)
1549 {
1550 /*FIXME    Need to to whatever GetColorSpace actually does */
1551     return 0;
1552 }
1553
1554 /***********************************************************************
1555  *           CreateColorSpaceA    (GDI32.@)
1556  */
1557 HCOLORSPACE WINAPI CreateColorSpaceA( LPLOGCOLORSPACEA lpLogColorSpace )
1558 {
1559   FIXME( "stub\n" );
1560   return 0;
1561 }
1562
1563 /***********************************************************************
1564  *           CreateColorSpaceW    (GDI32.@)
1565  */
1566 HCOLORSPACE WINAPI CreateColorSpaceW( LPLOGCOLORSPACEW lpLogColorSpace )
1567 {
1568   FIXME( "stub\n" );
1569   return 0;
1570 }
1571
1572 /***********************************************************************
1573  *           DeleteColorSpace     (GDI32.@)
1574  */
1575 BOOL WINAPI DeleteColorSpace( HCOLORSPACE hColorSpace )
1576 {
1577   FIXME( "stub\n" );
1578
1579   return TRUE;
1580 }
1581
1582 /***********************************************************************
1583  *           SetColorSpace     (GDI32.@)
1584  */
1585 HCOLORSPACE WINAPI SetColorSpace( HDC hDC, HCOLORSPACE hColorSpace )
1586 {
1587   FIXME( "stub\n" );
1588
1589   return hColorSpace;
1590 }
1591
1592 /***********************************************************************
1593  *           GetBoundsRect    (GDI32.@)
1594  */
1595 UINT WINAPI GetBoundsRect(HDC hdc, LPRECT rect, UINT flags)
1596 {
1597     UINT ret;
1598     DC *dc = get_dc_ptr( hdc );
1599
1600     if ( !dc ) return 0;
1601
1602     if (rect) *rect = dc->BoundsRect;
1603
1604     ret = ((dc->flags & DC_BOUNDS_SET) ? DCB_SET : DCB_RESET);
1605
1606     if (flags & DCB_RESET)
1607     {
1608         dc->BoundsRect.left   = 0;
1609         dc->BoundsRect.top    = 0;
1610         dc->BoundsRect.right  = 0;
1611         dc->BoundsRect.bottom = 0;
1612         dc->flags &= ~DC_BOUNDS_SET;
1613     }
1614     release_dc_ptr( dc );
1615     return ret;
1616 }
1617
1618
1619 /***********************************************************************
1620  *           SetBoundsRect    (GDI32.@)
1621  */
1622 UINT WINAPI SetBoundsRect(HDC hdc, const RECT* rect, UINT flags)
1623 {
1624     UINT ret;
1625     DC *dc;
1626
1627     if ((flags & DCB_ENABLE) && (flags & DCB_DISABLE)) return 0;
1628     if (!(dc = get_dc_ptr( hdc ))) return 0;
1629
1630     ret = ((dc->flags & DC_BOUNDS_ENABLE) ? DCB_ENABLE : DCB_DISABLE) |
1631           ((dc->flags & DC_BOUNDS_SET) ? DCB_SET : DCB_RESET);
1632
1633     if (flags & DCB_RESET)
1634     {
1635         dc->BoundsRect.left   = 0;
1636         dc->BoundsRect.top    = 0;
1637         dc->BoundsRect.right  = 0;
1638         dc->BoundsRect.bottom = 0;
1639         dc->flags &= ~DC_BOUNDS_SET;
1640     }
1641
1642     if ((flags & DCB_ACCUMULATE) && rect && rect->left < rect->right && rect->top < rect->bottom)
1643     {
1644         if (dc->flags & DC_BOUNDS_SET)
1645         {
1646             dc->BoundsRect.left   = min( dc->BoundsRect.left, rect->left );
1647             dc->BoundsRect.top    = min( dc->BoundsRect.top, rect->top );
1648             dc->BoundsRect.right  = max( dc->BoundsRect.right, rect->right );
1649             dc->BoundsRect.bottom = max( dc->BoundsRect.bottom, rect->bottom );
1650         }
1651         else
1652         {
1653             dc->BoundsRect = *rect;
1654             dc->flags |= DC_BOUNDS_SET;
1655         }
1656     }
1657
1658     if (flags & DCB_ENABLE) dc->flags |= DC_BOUNDS_ENABLE;
1659     if (flags & DCB_DISABLE) dc->flags &= ~DC_BOUNDS_ENABLE;
1660
1661     release_dc_ptr( dc );
1662     return ret;
1663 }
1664
1665
1666 /***********************************************************************
1667  *              GetRelAbs               (GDI32.@)
1668  */
1669 INT WINAPI GetRelAbs( HDC hdc, DWORD dwIgnore )
1670 {
1671     INT ret = 0;
1672     DC *dc = get_dc_ptr( hdc );
1673     if (dc)
1674     {
1675         ret = dc->relAbsMode;
1676         release_dc_ptr( dc );
1677     }
1678     return ret;
1679 }
1680
1681
1682
1683
1684 /***********************************************************************
1685  *              GetBkMode (GDI32.@)
1686  */
1687 INT WINAPI GetBkMode( HDC hdc )
1688 {
1689     INT ret = 0;
1690     DC * dc = get_dc_ptr( hdc );
1691     if (dc)
1692     {
1693         ret = dc->backgroundMode;
1694         release_dc_ptr( dc );
1695     }
1696     return ret;
1697 }
1698
1699
1700 /***********************************************************************
1701  *              SetBkMode (GDI32.@)
1702  */
1703 INT WINAPI SetBkMode( HDC hdc, INT mode )
1704 {
1705     INT ret;
1706     DC *dc;
1707     if ((mode <= 0) || (mode > BKMODE_LAST))
1708     {
1709         SetLastError(ERROR_INVALID_PARAMETER);
1710         return 0;
1711     }
1712     if (!(dc = get_dc_ptr( hdc ))) return 0;
1713
1714     ret = dc->backgroundMode;
1715     if (dc->funcs->pSetBkMode)
1716         if (!dc->funcs->pSetBkMode( dc->physDev, mode ))
1717             ret = 0;
1718     if (ret)
1719         dc->backgroundMode = mode;
1720     release_dc_ptr( dc );
1721     return ret;
1722 }
1723
1724
1725 /***********************************************************************
1726  *              GetROP2 (GDI32.@)
1727  */
1728 INT WINAPI GetROP2( HDC hdc )
1729 {
1730     INT ret = 0;
1731     DC * dc = get_dc_ptr( hdc );
1732     if (dc)
1733     {
1734         ret = dc->ROPmode;
1735         release_dc_ptr( dc );
1736     }
1737     return ret;
1738 }
1739
1740
1741 /***********************************************************************
1742  *              SetROP2 (GDI32.@)
1743  */
1744 INT WINAPI SetROP2( HDC hdc, INT mode )
1745 {
1746     INT ret;
1747     DC *dc;
1748     if ((mode < R2_BLACK) || (mode > R2_WHITE))
1749     {
1750         SetLastError(ERROR_INVALID_PARAMETER);
1751         return 0;
1752     }
1753     if (!(dc = get_dc_ptr( hdc ))) return 0;
1754     ret = dc->ROPmode;
1755     if (dc->funcs->pSetROP2)
1756         if (!dc->funcs->pSetROP2( dc->physDev, mode ))
1757             ret = 0;
1758     if (ret)
1759         dc->ROPmode = mode;
1760     release_dc_ptr( dc );
1761     return ret;
1762 }
1763
1764
1765 /***********************************************************************
1766  *              SetRelAbs (GDI32.@)
1767  */
1768 INT WINAPI SetRelAbs( HDC hdc, INT mode )
1769 {
1770     INT ret;
1771     DC *dc;
1772     if ((mode != ABSOLUTE) && (mode != RELATIVE))
1773     {
1774         SetLastError(ERROR_INVALID_PARAMETER);
1775         return 0;
1776     }
1777     if (!(dc = get_dc_ptr( hdc ))) return 0;
1778     if (dc->funcs->pSetRelAbs)
1779         ret = dc->funcs->pSetRelAbs( dc->physDev, mode );
1780     else
1781     {
1782         ret = dc->relAbsMode;
1783         dc->relAbsMode = mode;
1784     }
1785     release_dc_ptr( dc );
1786     return ret;
1787 }
1788
1789
1790 /***********************************************************************
1791  *              GetPolyFillMode (GDI32.@)
1792  */
1793 INT WINAPI GetPolyFillMode( HDC hdc )
1794 {
1795     INT ret = 0;
1796     DC * dc = get_dc_ptr( hdc );
1797     if (dc)
1798     {
1799         ret = dc->polyFillMode;
1800         release_dc_ptr( dc );
1801     }
1802     return ret;
1803 }
1804
1805
1806 /***********************************************************************
1807  *              SetPolyFillMode (GDI32.@)
1808  */
1809 INT WINAPI SetPolyFillMode( HDC hdc, INT mode )
1810 {
1811     INT ret;
1812     DC *dc;
1813     if ((mode <= 0) || (mode > POLYFILL_LAST))
1814     {
1815         SetLastError(ERROR_INVALID_PARAMETER);
1816         return 0;
1817     }
1818     if (!(dc = get_dc_ptr( hdc ))) return 0;
1819     ret = dc->polyFillMode;
1820     if (dc->funcs->pSetPolyFillMode)
1821         if (!dc->funcs->pSetPolyFillMode( dc->physDev, mode ))
1822             ret = 0;
1823     if (ret)
1824         dc->polyFillMode = mode;
1825     release_dc_ptr( dc );
1826     return ret;
1827 }
1828
1829
1830 /***********************************************************************
1831  *              GetStretchBltMode (GDI32.@)
1832  */
1833 INT WINAPI GetStretchBltMode( HDC hdc )
1834 {
1835     INT ret = 0;
1836     DC * dc = get_dc_ptr( hdc );
1837     if (dc)
1838     {
1839         ret = dc->stretchBltMode;
1840         release_dc_ptr( dc );
1841     }
1842     return ret;
1843 }
1844
1845
1846 /***********************************************************************
1847  *              SetStretchBltMode (GDI32.@)
1848  */
1849 INT WINAPI SetStretchBltMode( HDC hdc, INT mode )
1850 {
1851     INT ret;
1852     DC *dc;
1853     if ((mode <= 0) || (mode > MAXSTRETCHBLTMODE))
1854     {
1855         SetLastError(ERROR_INVALID_PARAMETER);
1856         return 0;
1857     }
1858     if (!(dc = get_dc_ptr( hdc ))) return 0;
1859     ret = dc->stretchBltMode;
1860     if (dc->funcs->pSetStretchBltMode)
1861         if (!dc->funcs->pSetStretchBltMode( dc->physDev, mode ))
1862             ret = 0;
1863     if (ret)
1864         dc->stretchBltMode = mode;
1865     release_dc_ptr( dc );
1866     return ret;
1867 }
1868
1869
1870 /***********************************************************************
1871  *              GetMapMode (GDI32.@)
1872  */
1873 INT WINAPI GetMapMode( HDC hdc )
1874 {
1875     INT ret = 0;
1876     DC * dc = get_dc_ptr( hdc );
1877     if (dc)
1878     {
1879         ret = dc->MapMode;
1880         release_dc_ptr( dc );
1881     }
1882     return ret;
1883 }
1884
1885
1886 /***********************************************************************
1887  *              GetBrushOrgEx (GDI32.@)
1888  */
1889 BOOL WINAPI GetBrushOrgEx( HDC hdc, LPPOINT pt )
1890 {
1891     DC * dc = get_dc_ptr( hdc );
1892     if (!dc) return FALSE;
1893     pt->x = dc->brushOrgX;
1894     pt->y = dc->brushOrgY;
1895     release_dc_ptr( dc );
1896     return TRUE;
1897 }
1898
1899
1900 /***********************************************************************
1901  *              GetCurrentPositionEx (GDI32.@)
1902  */
1903 BOOL WINAPI GetCurrentPositionEx( HDC hdc, LPPOINT pt )
1904 {
1905     DC * dc = get_dc_ptr( hdc );
1906     if (!dc) return FALSE;
1907     pt->x = dc->CursPosX;
1908     pt->y = dc->CursPosY;
1909     release_dc_ptr( dc );
1910     return TRUE;
1911 }
1912
1913
1914 /***********************************************************************
1915  *              GetViewportExtEx (GDI32.@)
1916  */
1917 BOOL WINAPI GetViewportExtEx( HDC hdc, LPSIZE size )
1918 {
1919     DC * dc = get_dc_ptr( hdc );
1920     if (!dc) return FALSE;
1921     size->cx = dc->vportExtX;
1922     size->cy = dc->vportExtY;
1923     release_dc_ptr( dc );
1924     return TRUE;
1925 }
1926
1927
1928 /***********************************************************************
1929  *              GetViewportOrgEx (GDI32.@)
1930  */
1931 BOOL WINAPI GetViewportOrgEx( HDC hdc, LPPOINT pt )
1932 {
1933     DC * dc = get_dc_ptr( hdc );
1934     if (!dc) return FALSE;
1935     pt->x = dc->vportOrgX;
1936     pt->y = dc->vportOrgY;
1937     release_dc_ptr( dc );
1938     return TRUE;
1939 }
1940
1941
1942 /***********************************************************************
1943  *              GetWindowExtEx (GDI32.@)
1944  */
1945 BOOL WINAPI GetWindowExtEx( HDC hdc, LPSIZE size )
1946 {
1947     DC * dc = get_dc_ptr( hdc );
1948     if (!dc) return FALSE;
1949     size->cx = dc->wndExtX;
1950     size->cy = dc->wndExtY;
1951     release_dc_ptr( dc );
1952     return TRUE;
1953 }
1954
1955
1956 /***********************************************************************
1957  *              GetWindowOrgEx (GDI32.@)
1958  */
1959 BOOL WINAPI GetWindowOrgEx( HDC hdc, LPPOINT pt )
1960 {
1961     DC * dc = get_dc_ptr( hdc );
1962     if (!dc) return FALSE;
1963     pt->x = dc->wndOrgX;
1964     pt->y = dc->wndOrgY;
1965     release_dc_ptr( dc );
1966     return TRUE;
1967 }
1968
1969
1970 /***********************************************************************
1971  *              InquireVisRgn   (GDI.131)
1972  */
1973 HRGN16 WINAPI InquireVisRgn16( HDC16 hdc )
1974 {
1975     HRGN16 ret = 0;
1976     DC * dc = get_dc_ptr( HDC_32(hdc) );
1977     if (dc)
1978     {
1979         ret = HRGN_16(dc->hVisRgn);
1980         release_dc_ptr( dc );
1981     }
1982     return ret;
1983 }
1984
1985
1986 /***********************************************************************
1987  *              GetClipRgn (GDI.173)
1988  */
1989 HRGN16 WINAPI GetClipRgn16( HDC16 hdc )
1990 {
1991     HRGN16 ret = 0;
1992     DC * dc = get_dc_ptr( HDC_32(hdc) );
1993     if (dc)
1994     {
1995         ret = HRGN_16(dc->hClipRgn);
1996         release_dc_ptr( dc );
1997     }
1998     return ret;
1999 }
2000
2001
2002 /***********************************************************************
2003  *           GetLayout    (GDI32.@)
2004  *
2005  * Gets left->right or right->left text layout flags of a dc.
2006  *
2007  */
2008 DWORD WINAPI GetLayout(HDC hdc)
2009 {
2010     DWORD layout = GDI_ERROR;
2011
2012     DC * dc = get_dc_ptr( hdc );
2013     if (dc)
2014     {
2015         layout = dc->layout;
2016         release_dc_ptr( dc );
2017     }
2018
2019     TRACE("hdc : %p, layout : %08x\n", hdc, layout);
2020
2021     return layout;
2022 }
2023
2024 /***********************************************************************
2025  *           SetLayout    (GDI32.@)
2026  *
2027  * Sets left->right or right->left text layout flags of a dc.
2028  *
2029  */
2030 DWORD WINAPI SetLayout(HDC hdc, DWORD layout)
2031 {
2032     DWORD oldlayout = GDI_ERROR;
2033
2034     DC * dc = get_dc_ptr( hdc );
2035     if (dc)
2036     {
2037         oldlayout = dc->layout;
2038         dc->layout = layout;
2039         release_dc_ptr( dc );
2040     }
2041
2042     TRACE("hdc : %p, old layout : %08x, new layout : %08x\n", hdc, oldlayout, layout);
2043
2044     return oldlayout;
2045 }
2046
2047 /***********************************************************************
2048  *           GetDCBrushColor    (GDI32.@)
2049  *
2050  * Retrieves the current brush color for the specified device
2051  * context (DC).
2052  *
2053  */
2054 COLORREF WINAPI GetDCBrushColor(HDC hdc)
2055 {
2056     DC *dc;
2057     COLORREF dcBrushColor = CLR_INVALID;
2058
2059     TRACE("hdc(%p)\n", hdc);
2060
2061     dc = get_dc_ptr( hdc );
2062     if (dc)
2063     {
2064         dcBrushColor = dc->dcBrushColor;
2065         release_dc_ptr( dc );
2066     }
2067
2068     return dcBrushColor;
2069 }
2070
2071 /***********************************************************************
2072  *           SetDCBrushColor    (GDI32.@)
2073  *
2074  * Sets the current device context (DC) brush color to the specified
2075  * color value. If the device cannot represent the specified color
2076  * value, the color is set to the nearest physical color.
2077  *
2078  */
2079 COLORREF WINAPI SetDCBrushColor(HDC hdc, COLORREF crColor)
2080 {
2081     DC *dc;
2082     COLORREF oldClr = CLR_INVALID;
2083
2084     TRACE("hdc(%p) crColor(%08x)\n", hdc, crColor);
2085
2086     dc = get_dc_ptr( hdc );
2087     if (dc)
2088     {
2089         if (dc->funcs->pSetDCBrushColor)
2090             crColor = dc->funcs->pSetDCBrushColor( dc->physDev, crColor );
2091         else if (dc->hBrush == GetStockObject( DC_BRUSH ))
2092         {
2093             /* If DC_BRUSH is selected, update driver pen color */
2094             HBRUSH hBrush = CreateSolidBrush( crColor );
2095             dc->funcs->pSelectBrush( dc->physDev, hBrush );
2096             DeleteObject( hBrush );
2097         }
2098
2099         if (crColor != CLR_INVALID)
2100         {
2101             oldClr = dc->dcBrushColor;
2102             dc->dcBrushColor = crColor;
2103         }
2104
2105         release_dc_ptr( dc );
2106     }
2107
2108     return oldClr;
2109 }
2110
2111 /***********************************************************************
2112  *           GetDCPenColor    (GDI32.@)
2113  *
2114  * Retrieves the current pen color for the specified device
2115  * context (DC).
2116  *
2117  */
2118 COLORREF WINAPI GetDCPenColor(HDC hdc)
2119 {
2120     DC *dc;
2121     COLORREF dcPenColor = CLR_INVALID;
2122
2123     TRACE("hdc(%p)\n", hdc);
2124
2125     dc = get_dc_ptr( hdc );
2126     if (dc)
2127     {
2128         dcPenColor = dc->dcPenColor;
2129         release_dc_ptr( dc );
2130     }
2131
2132     return dcPenColor;
2133 }
2134
2135 /***********************************************************************
2136  *           SetDCPenColor    (GDI32.@)
2137  *
2138  * Sets the current device context (DC) pen color to the specified
2139  * color value. If the device cannot represent the specified color
2140  * value, the color is set to the nearest physical color.
2141  *
2142  */
2143 COLORREF WINAPI SetDCPenColor(HDC hdc, COLORREF crColor)
2144 {
2145     DC *dc;
2146     COLORREF oldClr = CLR_INVALID;
2147
2148     TRACE("hdc(%p) crColor(%08x)\n", hdc, crColor);
2149
2150     dc = get_dc_ptr( hdc );
2151     if (dc)
2152     {
2153         if (dc->funcs->pSetDCPenColor)
2154             crColor = dc->funcs->pSetDCPenColor( dc->physDev, crColor );
2155         else if (dc->hPen == GetStockObject( DC_PEN ))
2156         {
2157             /* If DC_PEN is selected, update the driver pen color */
2158             LOGPEN logpen = { PS_SOLID, { 0, 0 }, crColor };
2159             HPEN hPen = CreatePenIndirect( &logpen );
2160             dc->funcs->pSelectPen( dc->physDev, hPen );
2161             DeleteObject( hPen );
2162         }
2163
2164         if (crColor != CLR_INVALID)
2165         {
2166             oldClr = dc->dcPenColor;
2167             dc->dcPenColor = crColor;
2168         }
2169
2170         release_dc_ptr( dc );
2171     }
2172
2173     return oldClr;
2174 }
2175
2176 /***********************************************************************
2177  *           CancelDC    (GDI32.@)
2178  */
2179 BOOL WINAPI CancelDC(HDC hdc)
2180 {
2181     FIXME("stub\n");
2182     return TRUE;
2183 }
2184
2185 /***********************************************************************
2186  *           SetVirtualResolution   (GDI32.@)
2187  *
2188  * Undocumented on msdn.  Called when PowerPoint XP saves a file.
2189  */
2190 DWORD WINAPI SetVirtualResolution(HDC hdc, DWORD dw2, DWORD dw3, DWORD dw4, DWORD dw5)
2191 {
2192     FIXME("(%p %08x %08x %08x %08x): stub!\n", hdc, dw2, dw3, dw4, dw5);
2193     return FALSE;
2194 }
2195
2196 /*******************************************************************
2197  *      GetMiterLimit [GDI32.@]
2198  *
2199  *
2200  */
2201 BOOL WINAPI GetMiterLimit(HDC hdc, PFLOAT peLimit)
2202 {
2203     BOOL bRet = FALSE;
2204     DC *dc;
2205
2206     TRACE("(%p,%p)\n", hdc, peLimit);
2207
2208     dc = get_dc_ptr( hdc );
2209     if (dc)
2210     {
2211         if (peLimit)
2212             *peLimit = dc->miterLimit;
2213
2214         release_dc_ptr( dc );
2215         bRet = TRUE;
2216     }
2217     return bRet;
2218 }
2219
2220 /*******************************************************************
2221  *      SetMiterLimit [GDI32.@]
2222  *
2223  *
2224  */
2225 BOOL WINAPI SetMiterLimit(HDC hdc, FLOAT eNewLimit, PFLOAT peOldLimit)
2226 {
2227     BOOL bRet = FALSE;
2228     DC *dc;
2229
2230     TRACE("(%p,%f,%p)\n", hdc, eNewLimit, peOldLimit);
2231
2232     dc = get_dc_ptr( hdc );
2233     if (dc)
2234     {
2235         if (peOldLimit)
2236             *peOldLimit = dc->miterLimit;
2237         dc->miterLimit = eNewLimit;
2238         release_dc_ptr( dc );
2239         bRet = TRUE;
2240     }
2241     return bRet;
2242 }
2243
2244 /*******************************************************************
2245  *      GdiIsMetaPrintDC [GDI32.@]
2246  */
2247 BOOL WINAPI GdiIsMetaPrintDC(HDC hdc)
2248 {
2249     FIXME("%p\n", hdc);
2250     return FALSE;
2251 }
2252
2253 /*******************************************************************
2254  *      GdiIsMetaFileDC [GDI32.@]
2255  */
2256 BOOL WINAPI GdiIsMetaFileDC(HDC hdc)
2257 {
2258     TRACE("%p\n", hdc);
2259
2260     switch( GetObjectType( hdc ) )
2261     {
2262     case OBJ_METADC:
2263     case OBJ_ENHMETADC:
2264         return TRUE;
2265     }
2266     return FALSE;
2267 }
2268
2269 /*******************************************************************
2270  *      GdiIsPlayMetafileDC [GDI32.@]
2271  */
2272 BOOL WINAPI GdiIsPlayMetafileDC(HDC hdc)
2273 {
2274     FIXME("%p\n", hdc);
2275     return FALSE;
2276 }