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,             /* 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, MAGIC_DONTCARE );
  57     if (!dc) return NULL;
  58
  59     if ((GDIMAGIC(dc->header.wMagic) != DC_MAGIC) &&
  60         (GDIMAGIC(dc->header.wMagic) != MEMORY_DC_MAGIC) &&
  61         (GDIMAGIC(dc->header.wMagic) != METAFILE_DC_MAGIC) &&
  62         (GDIMAGIC(dc->header.wMagic) != ENHMETAFILE_DC_MAGIC))
  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     HDC hdc;
  78     DC *dc;
  79
  80     if (!(dc = GDI_AllocObject( sizeof(*dc), magic, (HGDIOBJ*)&hdc, &dc_funcs ))) return NULL;
  81
  82     dc->hSelf               = hdc;
  83     dc->funcs               = funcs;
  84     dc->physDev             = NULL;
  85     dc->thread              = GetCurrentThreadId();
  86     dc->refcount            = 1;
  87     dc->dirty               = 0;
  88     dc->saveLevel           = 0;
  89     dc->saved_dc            = 0;
  90     dc->dwHookData          = 0;
  91     dc->hookProc            = NULL;
  92     dc->hookThunk           = NULL;
  93     dc->wndOrgX             = 0;
  94     dc->wndOrgY             = 0;
  95     dc->wndExtX             = 1;
  96     dc->wndExtY             = 1;
  97     dc->vportOrgX           = 0;
  98     dc->vportOrgY           = 0;
  99     dc->vportExtX           = 1;
 100     dc->vportExtY           = 1;
 101     dc->miterLimit          = 10.0f; /* 10.0 is the default, from MSDN */
 102     dc->flags               = 0;
 103     dc->layout              = 0;
 104     dc->hClipRgn            = 0;
 105     dc->hMetaRgn            = 0;
 106     dc->hMetaClipRgn        = 0;
 107     dc->hVisRgn             = 0;
 108     dc->hPen                = GetStockObject( BLACK_PEN );
 109     dc->hBrush              = GetStockObject( WHITE_BRUSH );
 110     dc->hFont               = GetStockObject( SYSTEM_FONT );
 111     dc->hBitmap             = 0;
 112     dc->hDevice             = 0;
 113     dc->hPalette            = GetStockObject( DEFAULT_PALETTE );
 114     dc->gdiFont             = 0;
 115     dc->ROPmode             = R2_COPYPEN;
 116     dc->polyFillMode        = ALTERNATE;
 117     dc->stretchBltMode      = BLACKONWHITE;
 118     dc->relAbsMode          = ABSOLUTE;
 119     dc->backgroundMode      = OPAQUE;
 120     dc->backgroundColor     = RGB( 255, 255, 255 );
 121     dc->dcBrushColor        = RGB( 255, 255, 255 );
 122     dc->dcPenColor          = RGB( 0, 0, 0 );
 123     dc->textColor           = RGB( 0, 0, 0 );
 124     dc->brushOrgX           = 0;
 125     dc->brushOrgY           = 0;
 126     dc->textAlign           = TA_LEFT | TA_TOP | TA_NOUPDATECP;
 127     dc->charExtra           = 0;
 128     dc->breakExtra          = 0;
 129     dc->breakRem            = 0;
 130     dc->MapMode             = MM_TEXT;
 131     dc->GraphicsMode        = GM_COMPATIBLE;
 132     dc->pAbortProc          = NULL;
 133     dc->CursPosX            = 0;
 134     dc->CursPosY            = 0;
 135     dc->ArcDirection        = AD_COUNTERCLOCKWISE;
 136     dc->xformWorld2Wnd.eM11 = 1.0f;
 137     dc->xformWorld2Wnd.eM12 = 0.0f;
 138     dc->xformWorld2Wnd.eM21 = 0.0f;
 139     dc->xformWorld2Wnd.eM22 = 1.0f;
 140     dc->xformWorld2Wnd.eDx  = 0.0f;
 141     dc->xformWorld2Wnd.eDy  = 0.0f;
 142     dc->xformWorld2Vport    = dc->xformWorld2Wnd;
 143     dc->xformVport2World    = dc->xformWorld2Wnd;
 144     dc->vport2WorldValid    = TRUE;
 145     dc->BoundsRect.left     = 0;
 146     dc->BoundsRect.top      = 0;
 147     dc->BoundsRect.right    = 0;
 148     dc->BoundsRect.bottom   = 0;
 149     dc->saved_visrgn        = NULL;
 150     PATH_InitGdiPath(&dc->path);
 151     GDI_ReleaseObj( dc->hSelf );
 152     return dc;
 153 }
 154
 155
 156
 157 /***********************************************************************
 158  *           free_dc_ptr
 159  */
 160 BOOL free_dc_ptr( DC *dc )
 161 {
 162     assert( dc->refcount == 1 );
 163     /* grab the gdi lock again */
 164     if (!GDI_GetObjPtr( dc->hSelf, MAGIC_DONTCARE )) return FALSE;  /* shouldn't happen */
 165     return GDI_FreeObject( dc->hSelf, dc );
 166 }
 167
 168
 169 /***********************************************************************
 170  *           get_dc_ptr
 171  *
 172  * Retrieve a DC pointer but release the GDI lock.
 173  */
 174 DC *get_dc_ptr( HDC hdc )
 175 {
 176     DC *dc = get_dc_obj( hdc );
 177     if (!dc) return NULL;
 178
 179     if (!InterlockedCompareExchange( &dc->refcount, 1, 0 ))
 180     {
 181         dc->thread = GetCurrentThreadId();
 182     }
 183     else if (dc->thread != GetCurrentThreadId())
 184     {
 185         WARN( "dc %p belongs to thread %04x\n", hdc, dc->thread );
 186         GDI_ReleaseObj( hdc );
 187         return NULL;
 188     }
 189     else InterlockedIncrement( &dc->refcount );
 190
 191     GDI_ReleaseObj( hdc );
 192     return dc;
 193 }
 194
 195
 196 /***********************************************************************
 197  *           release_dc_ptr
 198  */
 199 void release_dc_ptr( DC *dc )
 200 {
 201     LONG ref;
 202
 203     dc->thread = 0;
 204     ref = InterlockedDecrement( &dc->refcount );
 205     assert( ref >= 0 );
 206     if (ref) dc->thread = GetCurrentThreadId();  /* we still own it */
 207 }
 208
 209
 210 /***********************************************************************
 211  *           update_dc
 212  *
 213  * Make sure the DC vis region is up to date.
 214  * This function may call up to USER so the GDI lock should _not_
 215  * be held when calling it.
 216  */
 217 void update_dc( DC *dc )
 218 {
 219     if (InterlockedExchange( &dc->dirty, 0 ) && dc->hookThunk)
 220         dc->hookThunk( dc->hSelf, DCHC_INVALIDVISRGN, dc->dwHookData, 0 );
 221 }
 222
 223
 224 /***********************************************************************
 225  *           DC_DeleteObject
 226  */
 227 static BOOL DC_DeleteObject( HGDIOBJ handle, void *obj )
 228 {
 229     GDI_ReleaseObj( handle );
 230     return DeleteDC( handle );
 231 }
 232
 233
 234 /***********************************************************************
 235  *           DC_InitDC
 236  *
 237  * Setup device-specific DC values for a newly created DC.
 238  */
 239 void DC_InitDC( DC* dc )
 240 {
 241     if (dc->funcs->pRealizeDefaultPalette) dc->funcs->pRealizeDefaultPalette( dc->physDev );
 242     SetTextColor( dc->hSelf, dc->textColor );
 243     SetBkColor( dc->hSelf, dc->backgroundColor );
 244     SelectObject( dc->hSelf, dc->hPen );
 245     SelectObject( dc->hSelf, dc->hBrush );
 246     SelectObject( dc->hSelf, dc->hFont );
 247     CLIPPING_UpdateGCRegion( dc );
 248 }
 249
 250
 251 /***********************************************************************
 252  *           DC_InvertXform
 253  *
 254  * Computes the inverse of the transformation xformSrc and stores it to
 255  * xformDest. Returns TRUE if successful or FALSE if the xformSrc matrix
 256  * is singular.
 257  */
 258 static BOOL DC_InvertXform( const XFORM *xformSrc, XFORM *xformDest )
 259 {
 260     double determinant;
 261
 262     determinant = xformSrc->eM11*xformSrc->eM22 -
 263         xformSrc->eM12*xformSrc->eM21;
 264     if (determinant > -1e-12 && determinant < 1e-12)
 265         return FALSE;
 266
 267     xformDest->eM11 =  xformSrc->eM22 / determinant;
 268     xformDest->eM12 = -xformSrc->eM12 / determinant;
 269     xformDest->eM21 = -xformSrc->eM21 / determinant;
 270     xformDest->eM22 =  xformSrc->eM11 / determinant;
 271     xformDest->eDx  = -xformSrc->eDx * xformDest->eM11 -
 272                        xformSrc->eDy * xformDest->eM21;
 273     xformDest->eDy  = -xformSrc->eDx * xformDest->eM12 -
 274                        xformSrc->eDy * xformDest->eM22;
 275
 276     return TRUE;
 277 }
 278
 279
 280 /***********************************************************************
 281  *           DC_UpdateXforms
 282  *
 283  * Updates the xformWorld2Vport, xformVport2World and vport2WorldValid
 284  * fields of the specified DC by creating a transformation that
 285  * represents the current mapping mode and combining it with the DC's
 286  * world transform. This function should be called whenever the
 287  * parameters associated with the mapping mode (window and viewport
 288  * extents and origins) or the world transform change.
 289  */
 290 void DC_UpdateXforms( DC *dc )
 291 {
 292     XFORM xformWnd2Vport, oldworld2vport;
 293     double scaleX, scaleY;
 294
 295     /* Construct a transformation to do the window-to-viewport conversion */
 296     scaleX = (double)dc->vportExtX / (double)dc->wndExtX;
 297     scaleY = (double)dc->vportExtY / (double)dc->wndExtY;
 298     xformWnd2Vport.eM11 = scaleX;
 299     xformWnd2Vport.eM12 = 0.0;
 300     xformWnd2Vport.eM21 = 0.0;
 301     xformWnd2Vport.eM22 = scaleY;
 302     xformWnd2Vport.eDx  = (double)dc->vportOrgX -
 303         scaleX * (double)dc->wndOrgX;
 304     xformWnd2Vport.eDy  = (double)dc->vportOrgY -
 305         scaleY * (double)dc->wndOrgY;
 306
 307     oldworld2vport = dc->xformWorld2Vport;
 308     /* Combine with the world transformation */
 309     CombineTransform( &dc->xformWorld2Vport, &dc->xformWorld2Wnd,
 310         &xformWnd2Vport );
 311
 312     /* Create inverse of world-to-viewport transformation */
 313     dc->vport2WorldValid = DC_InvertXform( &dc->xformWorld2Vport,
 314         &dc->xformVport2World );
 315
 316     /* Reselect the font and pen back into the dc so that the size
 317        gets updated. */
 318     if ((oldworld2vport.eM11 != dc->xformWorld2Vport.eM11 ||
 319          oldworld2vport.eM22 != dc->xformWorld2Vport.eM22) &&
 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 HDC WINAPI GetDCState( HDC hdc )
 332 {
 333     DC * newdc, * dc;
 334     HGDIOBJ handle;
 335
 336     if (!(dc = get_dc_ptr( hdc ))) return 0;
 337     if (!(newdc = GDI_AllocObject( sizeof(DC), GDIMAGIC(dc->header.wMagic), &handle, &dc_funcs )))
 338     {
 339       release_dc_ptr( dc );
 340       return 0;
 341     }
 342     TRACE("(%p): returning %p\n", hdc, handle );
 343
 344     newdc->flags            = dc->flags | DC_SAVED;
 345     newdc->layout           = dc->layout;
 346     newdc->hPen             = dc->hPen;
 347     newdc->hBrush           = dc->hBrush;
 348     newdc->hFont            = dc->hFont;
 349     newdc->hBitmap          = dc->hBitmap;
 350     newdc->hDevice          = dc->hDevice;
 351     newdc->hPalette         = dc->hPalette;
 352     newdc->ROPmode          = dc->ROPmode;
 353     newdc->polyFillMode     = dc->polyFillMode;
 354     newdc->stretchBltMode   = dc->stretchBltMode;
 355     newdc->relAbsMode       = dc->relAbsMode;
 356     newdc->backgroundMode   = dc->backgroundMode;
 357     newdc->backgroundColor  = dc->backgroundColor;
 358     newdc->textColor        = dc->textColor;
 359     newdc->dcBrushColor     = dc->dcBrushColor;
 360     newdc->dcPenColor       = dc->dcPenColor;
 361     newdc->brushOrgX        = dc->brushOrgX;
 362     newdc->brushOrgY        = dc->brushOrgY;
 363     newdc->textAlign        = dc->textAlign;
 364     newdc->charExtra        = dc->charExtra;
 365     newdc->breakExtra       = dc->breakExtra;
 366     newdc->breakRem         = dc->breakRem;
 367     newdc->MapMode          = dc->MapMode;
 368     newdc->GraphicsMode     = dc->GraphicsMode;
 369     newdc->CursPosX         = dc->CursPosX;
 370     newdc->CursPosY         = dc->CursPosY;
 371     newdc->ArcDirection     = dc->ArcDirection;
 372     newdc->xformWorld2Wnd   = dc->xformWorld2Wnd;
 373     newdc->xformWorld2Vport = dc->xformWorld2Vport;
 374     newdc->xformVport2World = dc->xformVport2World;
 375     newdc->vport2WorldValid = dc->vport2WorldValid;
 376     newdc->wndOrgX          = dc->wndOrgX;
 377     newdc->wndOrgY          = dc->wndOrgY;
 378     newdc->wndExtX          = dc->wndExtX;
 379     newdc->wndExtY          = dc->wndExtY;
 380     newdc->vportOrgX        = dc->vportOrgX;
 381     newdc->vportOrgY        = dc->vportOrgY;
 382     newdc->vportExtX        = dc->vportExtX;
 383     newdc->vportExtY        = dc->vportExtY;
 384     newdc->BoundsRect       = dc->BoundsRect;
 385
 386     newdc->hSelf = (HDC)handle;
 387     newdc->thread    = GetCurrentThreadId();
 388     newdc->refcount  = 1;
 389     newdc->saveLevel = 0;
 390     newdc->saved_dc  = 0;
 391     GDI_ReleaseObj( handle );
 392
 393     PATH_InitGdiPath( &newdc->path );
 394
 395     newdc->pAbortProc = NULL;
 396     newdc->hookThunk  = NULL;
 397     newdc->hookProc   = 0;
 398     newdc->saved_visrgn = NULL;
 399
 400     /* Get/SetDCState() don't change hVisRgn field ("Undoc. Windows" p.559). */
 401
 402     newdc->hVisRgn      = 0;
 403     newdc->hClipRgn     = 0;
 404     newdc->hMetaRgn     = 0;
 405     newdc->hMetaClipRgn = 0;
 406     if (dc->hClipRgn)
 407     {
 408         newdc->hClipRgn = CreateRectRgn( 0, 0, 0, 0 );
 409         CombineRgn( newdc->hClipRgn, dc->hClipRgn, 0, RGN_COPY );
 410     }
 411     if (dc->hMetaRgn)
 412     {
 413         newdc->hMetaRgn = CreateRectRgn( 0, 0, 0, 0 );
 414         CombineRgn( newdc->hMetaRgn, dc->hMetaRgn, 0, RGN_COPY );
 415     }
 416     /* don't bother recomputing hMetaClipRgn, we'll do that in SetDCState */
 417
 418     if(dc->gdiFont) {
 419         newdc->gdiFont = dc->gdiFont;
 420     } else
 421         newdc->gdiFont = 0;
 422
 423     release_dc_ptr( newdc );
 424     release_dc_ptr( dc );
 425     return handle;
 426 }
 427
 428
 429 /***********************************************************************
 430  *           SetDCState   (Not a Windows API)
 431  */
 432 void WINAPI SetDCState( HDC hdc, HDC hdcs )
 433 {
 434     DC *dc, *dcs;
 435
 436     if (!(dc = get_dc_ptr( hdc ))) return;
 437     if (!(dcs = get_dc_ptr( hdcs )))
 438     {
 439         release_dc_ptr( dc );
 440         return;
 441     }
 442     if (!(dcs->flags & DC_SAVED))
 443     {
 444         release_dc_ptr( dc );
 445         release_dc_ptr( dcs );
 446         return;
 447     }
 448     TRACE("%p %p\n", hdc, hdcs );
 449
 450     update_dc( dc );
 451     dc->flags            = dcs->flags & ~DC_SAVED;
 452     dc->layout           = dcs->layout;
 453     dc->hDevice          = dcs->hDevice;
 454     dc->ROPmode          = dcs->ROPmode;
 455     dc->polyFillMode     = dcs->polyFillMode;
 456     dc->stretchBltMode   = dcs->stretchBltMode;
 457     dc->relAbsMode       = dcs->relAbsMode;
 458     dc->backgroundMode   = dcs->backgroundMode;
 459     dc->backgroundColor  = dcs->backgroundColor;
 460     dc->textColor        = dcs->textColor;
 461     dc->dcBrushColor     = dcs->dcBrushColor;
 462     dc->dcPenColor       = dcs->dcPenColor;
 463     dc->brushOrgX        = dcs->brushOrgX;
 464     dc->brushOrgY        = dcs->brushOrgY;
 465     dc->textAlign        = dcs->textAlign;
 466     dc->charExtra        = dcs->charExtra;
 467     dc->breakExtra       = dcs->breakExtra;
 468     dc->breakRem         = dcs->breakRem;
 469     dc->MapMode          = dcs->MapMode;
 470     dc->GraphicsMode     = dcs->GraphicsMode;
 471     dc->CursPosX         = dcs->CursPosX;
 472     dc->CursPosY         = dcs->CursPosY;
 473     dc->ArcDirection     = dcs->ArcDirection;
 474     dc->xformWorld2Wnd   = dcs->xformWorld2Wnd;
 475     dc->xformWorld2Vport = dcs->xformWorld2Vport;
 476     dc->xformVport2World = dcs->xformVport2World;
 477     dc->vport2WorldValid = dcs->vport2WorldValid;
 478     dc->BoundsRect       = dcs->BoundsRect;
 479
 480     dc->wndOrgX          = dcs->wndOrgX;
 481     dc->wndOrgY          = dcs->wndOrgY;
 482     dc->wndExtX          = dcs->wndExtX;
 483     dc->wndExtY          = dcs->wndExtY;
 484     dc->vportOrgX        = dcs->vportOrgX;
 485     dc->vportOrgY        = dcs->vportOrgY;
 486     dc->vportExtX        = dcs->vportExtX;
 487     dc->vportExtY        = dcs->vportExtY;
 488
 489     if (dcs->hClipRgn)
 490     {
 491         if (!dc->hClipRgn) dc->hClipRgn = CreateRectRgn( 0, 0, 0, 0 );
 492         CombineRgn( dc->hClipRgn, dcs->hClipRgn, 0, RGN_COPY );
 493     }
 494     else
 495     {
 496         if (dc->hClipRgn) DeleteObject( dc->hClipRgn );
 497         dc->hClipRgn = 0;
 498     }
 499     if (dcs->hMetaRgn)
 500     {
 501         if (!dc->hMetaRgn) dc->hMetaRgn = CreateRectRgn( 0, 0, 0, 0 );
 502         CombineRgn( dc->hMetaRgn, dcs->hMetaRgn, 0, RGN_COPY );
 503     }
 504     else
 505     {
 506         if (dc->hMetaRgn) DeleteObject( dc->hMetaRgn );
 507         dc->hMetaRgn = 0;
 508     }
 509     CLIPPING_UpdateGCRegion( dc );
 510
 511     SelectObject( hdc, dcs->hBitmap );
 512     SelectObject( hdc, dcs->hBrush );
 513     SelectObject( hdc, dcs->hFont );
 514     SelectObject( hdc, dcs->hPen );
 515     SetBkColor( hdc, dcs->backgroundColor);
 516     SetTextColor( hdc, dcs->textColor);
 517     GDISelectPalette( hdc, dcs->hPalette, FALSE );
 518     release_dc_ptr( dc );
 519     release_dc_ptr( dcs );
 520 }
 521
 522
 523 /***********************************************************************
 524  *           GetDCState   (GDI.179)
 525  */
 526 HDC16 WINAPI GetDCState16( HDC16 hdc )
 527 {
 528     return HDC_16( GetDCState( HDC_32(hdc) ));
 529 }
 530
 531
 532 /***********************************************************************
 533  *           SetDCState   (GDI.180)
 534  */
 535 void WINAPI SetDCState16( HDC16 hdc, HDC16 hdcs )
 536 {
 537     SetDCState( HDC_32(hdc), HDC_32(hdcs) );
 538 }
 539
 540
 541 /***********************************************************************
 542  *           SaveDC    (GDI32.@)
 543  */
 544 INT WINAPI SaveDC( HDC hdc )
 545 {
 546     HDC hdcs;
 547     DC * dc, * dcs;
 548     INT ret;
 549
 550     dc = get_dc_ptr( hdc );
 551     if (!dc) return 0;
 552
 553     if(dc->funcs->pSaveDC)
 554     {
 555         ret = dc->funcs->pSaveDC( dc->physDev );
 556         if(ret)
 557             ret = ++dc->saveLevel;
 558         release_dc_ptr( dc );
 559         return ret;
 560     }
 561
 562     if (!(hdcs = GetDCState( hdc )))
 563     {
 564         release_dc_ptr( dc );
 565         return 0;
 566     }
 567     dcs = get_dc_ptr( hdcs );
 568
 569     /* Copy path. The reason why path saving / restoring is in SaveDC/
 570      * RestoreDC and not in GetDCState/SetDCState is that the ...DCState
 571      * functions are only in Win16 (which doesn't have paths) and that
 572      * SetDCState doesn't allow us to signal an error (which can happen
 573      * when copying paths).
 574      */
 575     if (!PATH_AssignGdiPath( &dcs->path, &dc->path ))
 576     {
 577         release_dc_ptr( dc );
 578         release_dc_ptr( dcs );
 579         DeleteDC( hdcs );
 580         return 0;
 581     }
 582
 583     dcs->saved_dc = dc->saved_dc;
 584     dc->saved_dc = hdcs;
 585     TRACE("(%p): returning %d\n", hdc, dc->saveLevel+1 );
 586     ret = ++dc->saveLevel;
 587     release_dc_ptr( dcs );
 588     release_dc_ptr( dc );
 589     return ret;
 590 }
 591
 592
 593 /***********************************************************************
 594  *           RestoreDC    (GDI32.@)
 595  */
 596 BOOL WINAPI RestoreDC( HDC hdc, INT level )
 597 {
 598     DC * dc, * dcs;
 599     BOOL success;
 600
 601     TRACE("%p %d\n", hdc, level );
 602     if (!(dc = get_dc_ptr( hdc ))) return FALSE;
 603
 604     if(abs(level) > dc->saveLevel || level == 0)
 605     {
 606         release_dc_ptr( dc );
 607         return FALSE;
 608     }
 609
 610     update_dc( dc );
 611
 612     if(dc->funcs->pRestoreDC)
 613     {
 614         success = dc->funcs->pRestoreDC( dc->physDev, level );
 615         if(level < 0) level = dc->saveLevel + level + 1;
 616         if(success)
 617             dc->saveLevel = level - 1;
 618         release_dc_ptr( dc );
 619         return success;
 620     }
 621
 622     if (level < 0) level = dc->saveLevel + level + 1;
 623     success=TRUE;
 624     while (dc->saveLevel >= level)
 625     {
 626         HDC hdcs = dc->saved_dc;
 627         if (!(dcs = get_dc_ptr( hdcs )))
 628         {
 629             success = FALSE;
 630             break;
 631         }
 632         dc->saved_dc = dcs->saved_dc;
 633         dcs->saved_dc = 0;
 634         if (--dc->saveLevel < level)
 635         {
 636             SetDCState( hdc, hdcs );
 637             if (!PATH_AssignGdiPath( &dc->path, &dcs->path ))
 638                 /* FIXME: This might not be quite right, since we're
 639                  * returning FALSE but still destroying the saved DC state */
 640                 success=FALSE;
 641         }
 642         release_dc_ptr( dcs );
 643         DeleteDC( hdcs );
 644     }
 645     release_dc_ptr( dc );
 646     return success;
 647 }
 648
 649
 650 /***********************************************************************
 651  *           CreateDCW    (GDI32.@)
 652  */
 653 HDC WINAPI CreateDCW( LPCWSTR driver, LPCWSTR device, LPCWSTR output,
 654                       const DEVMODEW *initData )
 655 {
 656     HDC hdc;
 657     DC * dc;
 658     const DC_FUNCTIONS *funcs;
 659     WCHAR buf[300];
 660
 661     GDI_CheckNotLock();
 662
 663     if (!device || !DRIVER_GetDriverName( device, buf, 300 ))
 664     {
 665         if (!driver)
 666         {
 667             ERR( "no device found for %s\n", debugstr_w(device) );
 668             return 0;
 669         }
 670         strcpyW(buf, driver);
 671     }
 672
 673     if (!(funcs = DRIVER_load_driver( buf )))
 674     {
 675         ERR( "no driver found for %s\n", debugstr_w(buf) );
 676         return 0;
 677     }
 678     if (!(dc = alloc_dc_ptr( funcs, DC_MAGIC ))) goto error;
 679     hdc = dc->hSelf;
 680
 681     dc->hBitmap = GetStockObject( DEFAULT_BITMAP );
 682     if (!(dc->hVisRgn = CreateRectRgn( 0, 0, 1, 1 ))) goto error;
 683
 684     TRACE("(driver=%s, device=%s, output=%s): returning %p\n",
 685           debugstr_w(driver), debugstr_w(device), debugstr_w(output), dc->hSelf );
 686
 687     if (dc->funcs->pCreateDC &&
 688         !dc->funcs->pCreateDC( hdc, &dc->physDev, buf, device, output, initData ))
 689     {
 690         WARN("creation aborted by device\n" );
 691         goto error;
 692     }
 693
 694     SetRectRgn( dc->hVisRgn, 0, 0,
 695                 GetDeviceCaps( hdc, DESKTOPHORZRES ), GetDeviceCaps( hdc, DESKTOPVERTRES ) );
 696
 697     DC_InitDC( dc );
 698     release_dc_ptr( dc );
 699     return hdc;
 700
 701 error:
 702     if (dc && dc->hVisRgn) DeleteObject( dc->hVisRgn );
 703     if (dc) free_dc_ptr( dc );
 704     DRIVER_release_driver( funcs );
 705     return 0;
 706 }
 707
 708
 709 /***********************************************************************
 710  *           CreateDCA    (GDI32.@)
 711  */
 712 HDC WINAPI CreateDCA( LPCSTR driver, LPCSTR device, LPCSTR output,
 713                       const DEVMODEA *initData )
 714 {
 715     UNICODE_STRING driverW, deviceW, outputW;
 716     DEVMODEW *initDataW;
 717     HDC ret;
 718
 719     if (driver) RtlCreateUnicodeStringFromAsciiz(&driverW, driver);
 720     else driverW.Buffer = NULL;
 721
 722     if (device) RtlCreateUnicodeStringFromAsciiz(&deviceW, device);
 723     else deviceW.Buffer = NULL;
 724
 725     if (output) RtlCreateUnicodeStringFromAsciiz(&outputW, output);
 726     else outputW.Buffer = NULL;
 727
 728     initDataW = NULL;
 729     if (initData)
 730     {
 731         /* don't convert initData for DISPLAY driver, it's not used */
 732         if (!driverW.Buffer || strcmpiW( driverW.Buffer, displayW ))
 733             initDataW = GdiConvertToDevmodeW(initData);
 734     }
 735
 736     ret = CreateDCW( driverW.Buffer, deviceW.Buffer, outputW.Buffer, initDataW );
 737
 738     RtlFreeUnicodeString(&driverW);
 739     RtlFreeUnicodeString(&deviceW);
 740     RtlFreeUnicodeString(&outputW);
 741     HeapFree(GetProcessHeap(), 0, initDataW);
 742     return ret;
 743 }
 744
 745
 746 /***********************************************************************
 747  *           CreateICA    (GDI32.@)
 748  */
 749 HDC WINAPI CreateICA( LPCSTR driver, LPCSTR device, LPCSTR output,
 750                           const DEVMODEA* initData )
 751 {
 752       /* Nothing special yet for ICs */
 753     return CreateDCA( driver, device, output, initData );
 754 }
 755
 756
 757 /***********************************************************************
 758  *           CreateICW    (GDI32.@)
 759  */
 760 HDC WINAPI CreateICW( LPCWSTR driver, LPCWSTR device, LPCWSTR output,
 761                           const DEVMODEW* initData )
 762 {
 763       /* Nothing special yet for ICs */
 764     return CreateDCW( driver, device, output, initData );
 765 }
 766
 767
 768 /***********************************************************************
 769  *           CreateCompatibleDC   (GDI32.@)
 770  */
 771 HDC WINAPI CreateCompatibleDC( HDC hdc )
 772 {
 773     DC *dc, *origDC;
 774     HDC ret;
 775     const DC_FUNCTIONS *funcs = NULL;
 776     PHYSDEV physDev = NULL;
 777
 778     GDI_CheckNotLock();
 779
 780     if ((origDC = get_dc_ptr( hdc )))
 781     {
 782         if (GetObjectType( hdc ) == OBJ_DC)
 783         {
 784             funcs = origDC->funcs;
 785             physDev = origDC->physDev;
 786         }
 787         release_dc_ptr( origDC );
 788         if (funcs) funcs = DRIVER_get_driver( funcs );
 789     }
 790     else if (hdc) return 0;
 791
 792     if (!funcs && !(funcs = DRIVER_load_driver( displayW ))) return 0;
 793
 794     if (!(dc = alloc_dc_ptr( funcs, MEMORY_DC_MAGIC ))) goto error;
 795
 796     TRACE("(%p): returning %p\n", hdc, dc->hSelf );
 797
 798     dc->hBitmap = GetStockObject( DEFAULT_BITMAP );
 799     if (!(dc->hVisRgn = CreateRectRgn( 0, 0, 1, 1 ))) goto error;   /* default bitmap is 1x1 */
 800
 801     /* Copy the driver-specific physical device info into
 802      * the new DC. The driver may use this read-only info
 803      * while creating the compatible DC below. */
 804     dc->physDev = physDev;
 805     ret = dc->hSelf;
 806
 807     if (dc->funcs->pCreateDC &&
 808         !dc->funcs->pCreateDC( dc->hSelf, &dc->physDev, NULL, NULL, NULL, NULL ))
 809     {
 810         WARN("creation aborted by device\n");
 811         goto error;
 812     }
 813
 814     DC_InitDC( dc );
 815     release_dc_ptr( dc );
 816     return ret;
 817
 818 error:
 819     if (dc && dc->hVisRgn) DeleteObject( dc->hVisRgn );
 820     if (dc) free_dc_ptr( dc );
 821     DRIVER_release_driver( funcs );
 822     return 0;
 823 }
 824
 825
 826 /***********************************************************************
 827  *           DeleteDC    (GDI32.@)
 828  */
 829 BOOL WINAPI DeleteDC( HDC hdc )
 830 {
 831     const DC_FUNCTIONS *funcs = NULL;
 832     DC * dc;
 833
 834     TRACE("%p\n", hdc );
 835
 836     GDI_CheckNotLock();
 837
 838     if (!(dc = get_dc_ptr( hdc ))) return FALSE;
 839     if (dc->refcount != 1)
 840     {
 841         FIXME( "not deleting busy DC %p refcount %u\n", dc->hSelf, dc->refcount );
 842         release_dc_ptr( dc );
 843         return FALSE;
 844     }
 845
 846     /* Call hook procedure to check whether is it OK to delete this DC */
 847     if (dc->hookThunk && !dc->hookThunk( hdc, DCHC_DELETEDC, dc->dwHookData, 0 ))
 848     {
 849         release_dc_ptr( dc );
 850         return FALSE;
 851     }
 852
 853     while (dc->saveLevel)
 854     {
 855         DC * dcs;
 856         HDC hdcs = dc->saved_dc;
 857         if (!(dcs = get_dc_ptr( hdcs ))) break;
 858         dc->saved_dc = dcs->saved_dc;
 859         dc->saveLevel--;
 860         if (dcs->hClipRgn) DeleteObject( dcs->hClipRgn );
 861         if (dcs->hMetaRgn) DeleteObject( dcs->hMetaRgn );
 862         if (dcs->hMetaClipRgn) DeleteObject( dcs->hMetaClipRgn );
 863         if (dcs->hVisRgn) DeleteObject( dcs->hVisRgn );
 864         PATH_DestroyGdiPath(&dcs->path);
 865         free_dc_ptr( dcs );
 866     }
 867
 868     if (!(dc->flags & DC_SAVED))
 869     {
 870         SelectObject( hdc, GetStockObject(BLACK_PEN) );
 871         SelectObject( hdc, GetStockObject(WHITE_BRUSH) );
 872         SelectObject( hdc, GetStockObject(SYSTEM_FONT) );
 873         SelectObject( hdc, GetStockObject(DEFAULT_BITMAP) );
 874         funcs = dc->funcs;
 875         if (dc->funcs->pDeleteDC) dc->funcs->pDeleteDC(dc->physDev);
 876         dc->physDev = NULL;
 877     }
 878
 879     while (dc->saved_visrgn)
 880     {
 881         struct saved_visrgn *next = dc->saved_visrgn->next;
 882         DeleteObject( dc->saved_visrgn->hrgn );
 883         HeapFree( GetProcessHeap(), 0, dc->saved_visrgn );
 884         dc->saved_visrgn = next;
 885     }
 886     if (dc->hClipRgn) DeleteObject( dc->hClipRgn );
 887     if (dc->hMetaRgn) DeleteObject( dc->hMetaRgn );
 888     if (dc->hMetaClipRgn) DeleteObject( dc->hMetaClipRgn );
 889     if (dc->hVisRgn) DeleteObject( dc->hVisRgn );
 890     PATH_DestroyGdiPath(&dc->path);
 891
 892     free_dc_ptr( dc );
 893     if (funcs) DRIVER_release_driver( funcs );  /* do that after releasing the GDI lock */
 894     return TRUE;
 895 }
 896
 897
 898 /***********************************************************************
 899  *           ResetDCW    (GDI32.@)
 900  */
 901 HDC WINAPI ResetDCW( HDC hdc, const DEVMODEW *devmode )
 902 {
 903     DC *dc;
 904     HDC ret = hdc;
 905
 906     if ((dc = get_dc_ptr( hdc )))
 907     {
 908         if (dc->funcs->pResetDC) ret = dc->funcs->pResetDC( dc->physDev, devmode );
 909         release_dc_ptr( dc );
 910     }
 911     return ret;
 912 }
 913
 914
 915 /***********************************************************************
 916  *           ResetDCA    (GDI32.@)
 917  */
 918 HDC WINAPI ResetDCA( HDC hdc, const DEVMODEA *devmode )
 919 {
 920     DEVMODEW *devmodeW;
 921     HDC ret;
 922
 923     if (devmode) devmodeW = GdiConvertToDevmodeW(devmode);
 924     else devmodeW = NULL;
 925
 926     ret = ResetDCW(hdc, devmodeW);
 927
 928     HeapFree(GetProcessHeap(), 0, devmodeW);
 929     return ret;
 930 }
 931
 932
 933 /***********************************************************************
 934  *           GetDeviceCaps    (GDI32.@)
 935  */
 936 INT WINAPI GetDeviceCaps( HDC hdc, INT cap )
 937 {
 938     DC *dc;
 939     INT ret = 0;
 940
 941     if ((dc = get_dc_ptr( hdc )))
 942     {
 943         if (dc->funcs->pGetDeviceCaps) ret = dc->funcs->pGetDeviceCaps( dc->physDev, cap );
 944         else switch(cap)  /* return meaningful values for some entries */
 945         {
 946         case HORZRES:     ret = 640; break;
 947         case VERTRES:     ret = 480; break;
 948         case BITSPIXEL:   ret = 1; break;
 949         case PLANES:      ret = 1; break;
 950         case NUMCOLORS:   ret = 2; break;
 951         case ASPECTX:     ret = 36; break;
 952         case ASPECTY:     ret = 36; break;
 953         case ASPECTXY:    ret = 51; break;
 954         case LOGPIXELSX:  ret = 72; break;
 955         case LOGPIXELSY:  ret = 72; break;
 956         case SIZEPALETTE: ret = 2; break;
 957         }
 958         release_dc_ptr( dc );
 959     }
 960     return ret;
 961 }
 962
 963
 964 /***********************************************************************
 965  *              GetBkColor (GDI32.@)
 966  */
 967 COLORREF WINAPI GetBkColor( HDC hdc )
 968 {
 969     COLORREF ret = 0;
 970     DC * dc = get_dc_ptr( hdc );
 971     if (dc)
 972     {
 973         ret = dc->backgroundColor;
 974         release_dc_ptr( dc );
 975     }
 976     return ret;
 977 }
 978
 979
 980 /***********************************************************************
 981  *           SetBkColor    (GDI32.@)
 982  */
 983 COLORREF WINAPI SetBkColor( HDC hdc, COLORREF color )
 984 {
 985     COLORREF oldColor;
 986     DC * dc = get_dc_ptr( hdc );
 987
 988     TRACE("hdc=%p color=0x%08x\n", hdc, color);
 989
 990     if (!dc) return CLR_INVALID;
 991     oldColor = dc->backgroundColor;
 992     if (dc->funcs->pSetBkColor)
 993     {
 994         color = dc->funcs->pSetBkColor(dc->physDev, color);
 995         if (color == CLR_INVALID)  /* don't change it */
 996         {
 997             color = oldColor;
 998             oldColor = CLR_INVALID;
 999         }
1000     }
1001     dc->backgroundColor = color;
1002     release_dc_ptr( dc );
1003     return oldColor;
1004 }
1005
1006
1007 /***********************************************************************
1008  *              GetTextColor (GDI32.@)
1009  */
1010 COLORREF WINAPI GetTextColor( HDC hdc )
1011 {
1012     COLORREF ret = 0;
1013     DC * dc = get_dc_ptr( hdc );
1014     if (dc)
1015     {
1016         ret = dc->textColor;
1017         release_dc_ptr( dc );
1018     }
1019     return ret;
1020 }
1021
1022
1023 /***********************************************************************
1024  *           SetTextColor    (GDI32.@)
1025  */
1026 COLORREF WINAPI SetTextColor( HDC hdc, COLORREF color )
1027 {
1028     COLORREF oldColor;
1029     DC * dc = get_dc_ptr( hdc );
1030
1031     TRACE(" hdc=%p color=0x%08x\n", hdc, color);
1032
1033     if (!dc) return CLR_INVALID;
1034     oldColor = dc->textColor;
1035     if (dc->funcs->pSetTextColor)
1036     {
1037         color = dc->funcs->pSetTextColor(dc->physDev, color);
1038         if (color == CLR_INVALID)  /* don't change it */
1039         {
1040             color = oldColor;
1041             oldColor = CLR_INVALID;
1042         }
1043     }
1044     dc->textColor = color;
1045     release_dc_ptr( dc );
1046     return oldColor;
1047 }
1048
1049
1050 /***********************************************************************
1051  *              GetTextAlign (GDI32.@)
1052  */
1053 UINT WINAPI GetTextAlign( HDC hdc )
1054 {
1055     UINT ret = 0;
1056     DC * dc = get_dc_ptr( hdc );
1057     if (dc)
1058     {
1059         ret = dc->textAlign;
1060         release_dc_ptr( dc );
1061     }
1062     return ret;
1063 }
1064
1065
1066 /***********************************************************************
1067  *           SetTextAlign    (GDI32.@)
1068  */
1069 UINT WINAPI SetTextAlign( HDC hdc, UINT align )
1070 {
1071     UINT ret;
1072     DC *dc = get_dc_ptr( hdc );
1073
1074     TRACE("hdc=%p align=%d\n", hdc, align);
1075
1076     if (!dc) return 0x0;
1077     ret = dc->textAlign;
1078     if (dc->funcs->pSetTextAlign)
1079         if (!dc->funcs->pSetTextAlign(dc->physDev, align))
1080             ret = GDI_ERROR;
1081     if (ret != GDI_ERROR)
1082         dc->textAlign = align;
1083     release_dc_ptr( dc );
1084     return ret;
1085 }
1086
1087 /***********************************************************************
1088  *           GetDCOrgEx  (GDI32.@)
1089  */
1090 BOOL WINAPI GetDCOrgEx( HDC hDC, LPPOINT lpp )
1091 {
1092     DC * dc;
1093
1094     if (!lpp) return FALSE;
1095     if (!(dc = get_dc_ptr( hDC ))) return FALSE;
1096
1097     lpp->x = lpp->y = 0;
1098     if (dc->funcs->pGetDCOrgEx) dc->funcs->pGetDCOrgEx( dc->physDev, lpp );
1099     release_dc_ptr( dc );
1100     return TRUE;
1101 }
1102
1103
1104 /***********************************************************************
1105  *           SetDCOrg   (GDI.117)
1106  */
1107 DWORD WINAPI SetDCOrg16( HDC16 hdc16, INT16 x, INT16 y )
1108 {
1109     DWORD prevOrg = 0;
1110     HDC hdc = HDC_32( hdc16 );
1111     DC *dc = get_dc_ptr( hdc );
1112     if (!dc) return 0;
1113     if (dc->funcs->pSetDCOrg) prevOrg = dc->funcs->pSetDCOrg( dc->physDev, x, y );
1114     release_dc_ptr( dc );
1115     return prevOrg;
1116 }
1117
1118
1119 /***********************************************************************
1120  *              GetGraphicsMode (GDI32.@)
1121  */
1122 INT WINAPI GetGraphicsMode( HDC hdc )
1123 {
1124     INT ret = 0;
1125     DC * dc = get_dc_ptr( hdc );
1126     if (dc)
1127     {
1128         ret = dc->GraphicsMode;
1129         release_dc_ptr( dc );
1130     }
1131     return ret;
1132 }
1133
1134
1135 /***********************************************************************
1136  *           SetGraphicsMode    (GDI32.@)
1137  */
1138 INT WINAPI SetGraphicsMode( HDC hdc, INT mode )
1139 {
1140     INT ret = 0;
1141     DC *dc = get_dc_ptr( hdc );
1142
1143     /* One would think that setting the graphics mode to GM_COMPATIBLE
1144      * would also reset the world transformation matrix to the unity
1145      * matrix. However, in Windows, this is not the case. This doesn't
1146      * make a lot of sense to me, but that's the way it is.
1147      */
1148     if (!dc) return 0;
1149     if ((mode > 0) && (mode <= GM_LAST))
1150     {
1151         ret = dc->GraphicsMode;
1152         dc->GraphicsMode = mode;
1153     }
1154     release_dc_ptr( dc );
1155     return ret;
1156 }
1157
1158
1159 /***********************************************************************
1160  *              GetArcDirection (GDI32.@)
1161  */
1162 INT WINAPI GetArcDirection( HDC hdc )
1163 {
1164     INT ret = 0;
1165     DC * dc = get_dc_ptr( hdc );
1166     if (dc)
1167     {
1168         ret = dc->ArcDirection;
1169         release_dc_ptr( dc );
1170     }
1171     return ret;
1172 }
1173
1174
1175 /***********************************************************************
1176  *           SetArcDirection    (GDI32.@)
1177  */
1178 INT WINAPI SetArcDirection( HDC hdc, INT nDirection )
1179 {
1180     DC * dc;
1181     INT nOldDirection = 0;
1182
1183     if (nDirection!=AD_COUNTERCLOCKWISE && nDirection!=AD_CLOCKWISE)
1184     {
1185         SetLastError(ERROR_INVALID_PARAMETER);
1186         return 0;
1187     }
1188
1189     if ((dc = get_dc_ptr( hdc )))
1190     {
1191         if (dc->funcs->pSetArcDirection)
1192         {
1193             dc->funcs->pSetArcDirection(dc->physDev, nDirection);
1194         }
1195         nOldDirection = dc->ArcDirection;
1196         dc->ArcDirection = nDirection;
1197         release_dc_ptr( dc );
1198     }
1199     return nOldDirection;
1200 }
1201
1202
1203 /***********************************************************************
1204  *           GetWorldTransform    (GDI32.@)
1205  */
1206 BOOL WINAPI GetWorldTransform( HDC hdc, LPXFORM xform )
1207 {
1208     DC * dc;
1209     if (!xform) return FALSE;
1210     if (!(dc = get_dc_ptr( hdc ))) return FALSE;
1211     *xform = dc->xformWorld2Wnd;
1212     release_dc_ptr( dc );
1213     return TRUE;
1214 }
1215
1216
1217 /***********************************************************************
1218  *           GetTransform    (GDI32.@)
1219  */
1220 BOOL WINAPI GetTransform( HDC hdc, DWORD unknown, LPXFORM xform )
1221 {
1222     if (unknown == 0x0203) return GetWorldTransform( hdc, xform );
1223     FIXME("stub: don't know what to do for code %x\n", unknown );
1224     return FALSE;
1225 }
1226
1227
1228 /***********************************************************************
1229  *           SetWorldTransform    (GDI32.@)
1230  */
1231 BOOL WINAPI SetWorldTransform( HDC hdc, const XFORM *xform )
1232 {
1233     BOOL ret = FALSE;
1234     DC *dc = get_dc_ptr( hdc );
1235
1236     if (!dc) return FALSE;
1237     if (!xform) goto done;
1238
1239     /* Check that graphics mode is GM_ADVANCED */
1240     if (dc->GraphicsMode!=GM_ADVANCED) goto done;
1241
1242     TRACE("eM11 %f eM12 %f eM21 %f eM22 %f eDx %f eDy %f\n",
1243         xform->eM11, xform->eM12, xform->eM21, xform->eM22, xform->eDx, xform->eDy);
1244
1245     if (dc->funcs->pSetWorldTransform)
1246     {
1247         ret = dc->funcs->pSetWorldTransform(dc->physDev, xform);
1248         if (!ret) goto done;
1249     }
1250
1251     dc->xformWorld2Wnd = *xform;
1252     DC_UpdateXforms( dc );
1253     ret = TRUE;
1254  done:
1255     release_dc_ptr( dc );
1256     return ret;
1257 }
1258
1259
1260 /****************************************************************************
1261  * ModifyWorldTransform [GDI32.@]
1262  * Modifies the world transformation for a device context.
1263  *
1264  * PARAMS
1265  *    hdc   [I] Handle to device context
1266  *    xform [I] XFORM structure that will be used to modify the world
1267  *              transformation
1268  *    iMode [I] Specifies in what way to modify the world transformation
1269  *              Possible values:
1270  *              MWT_IDENTITY
1271  *                 Resets the world transformation to the identity matrix.
1272  *                 The parameter xform is ignored.
1273  *              MWT_LEFTMULTIPLY
1274  *                 Multiplies xform into the world transformation matrix from
1275  *                 the left.
1276  *              MWT_RIGHTMULTIPLY
1277  *                 Multiplies xform into the world transformation matrix from
1278  *                 the right.
1279  *
1280  * RETURNS
1281  *  Success: TRUE.
1282  *  Failure: FALSE. Use GetLastError() to determine the cause.
1283  */
1284 BOOL WINAPI ModifyWorldTransform( HDC hdc, const XFORM *xform,
1285     DWORD iMode )
1286 {
1287     BOOL ret = FALSE;
1288     DC *dc = get_dc_ptr( hdc );
1289
1290     /* Check for illegal parameters */
1291     if (!dc) return FALSE;
1292     if (!xform && iMode != MWT_IDENTITY) goto done;
1293
1294     /* Check that graphics mode is GM_ADVANCED */
1295     if (dc->GraphicsMode!=GM_ADVANCED) goto done;
1296
1297     if (dc->funcs->pModifyWorldTransform)
1298     {
1299         ret = dc->funcs->pModifyWorldTransform(dc->physDev, xform, iMode);
1300         if (!ret) goto done;
1301     }
1302
1303     switch (iMode)
1304     {
1305         case MWT_IDENTITY:
1306             dc->xformWorld2Wnd.eM11 = 1.0f;
1307             dc->xformWorld2Wnd.eM12 = 0.0f;
1308             dc->xformWorld2Wnd.eM21 = 0.0f;
1309             dc->xformWorld2Wnd.eM22 = 1.0f;
1310             dc->xformWorld2Wnd.eDx  = 0.0f;
1311             dc->xformWorld2Wnd.eDy  = 0.0f;
1312             break;
1313         case MWT_LEFTMULTIPLY:
1314             CombineTransform( &dc->xformWorld2Wnd, xform,
1315                 &dc->xformWorld2Wnd );
1316             break;
1317         case MWT_RIGHTMULTIPLY:
1318             CombineTransform( &dc->xformWorld2Wnd, &dc->xformWorld2Wnd,
1319                 xform );
1320             break;
1321         default:
1322             goto done;
1323     }
1324
1325     DC_UpdateXforms( dc );
1326     ret = TRUE;
1327  done:
1328     release_dc_ptr( dc );
1329     return ret;
1330 }
1331
1332
1333 /****************************************************************************
1334  * CombineTransform [GDI32.@]
1335  * Combines two transformation matrices.
1336  *
1337  * PARAMS
1338  *    xformResult [O] Stores the result of combining the two matrices
1339  *    xform1      [I] Specifies the first matrix to apply
1340  *    xform2      [I] Specifies the second matrix to apply
1341  *
1342  * REMARKS
1343  *    The same matrix can be passed in for more than one of the parameters.
1344  *
1345  * RETURNS
1346  *  Success: TRUE.
1347  *  Failure: FALSE. Use GetLastError() to determine the cause.
1348  */
1349 BOOL WINAPI CombineTransform( LPXFORM xformResult, const XFORM *xform1,
1350     const XFORM *xform2 )
1351 {
1352     XFORM xformTemp;
1353
1354     /* Check for illegal parameters */
1355     if (!xformResult || !xform1 || !xform2)
1356         return FALSE;
1357
1358     /* Create the result in a temporary XFORM, since xformResult may be
1359      * equal to xform1 or xform2 */
1360     xformTemp.eM11 = xform1->eM11 * xform2->eM11 +
1361                      xform1->eM12 * xform2->eM21;
1362     xformTemp.eM12 = xform1->eM11 * xform2->eM12 +
1363                      xform1->eM12 * xform2->eM22;
1364     xformTemp.eM21 = xform1->eM21 * xform2->eM11 +
1365                      xform1->eM22 * xform2->eM21;
1366     xformTemp.eM22 = xform1->eM21 * xform2->eM12 +
1367                      xform1->eM22 * xform2->eM22;
1368     xformTemp.eDx  = xform1->eDx  * xform2->eM11 +
1369                      xform1->eDy  * xform2->eM21 +
1370                      xform2->eDx;
1371     xformTemp.eDy  = xform1->eDx  * xform2->eM12 +
1372                      xform1->eDy  * xform2->eM22 +
1373                      xform2->eDy;
1374
1375     /* Copy the result to xformResult */
1376     *xformResult = xformTemp;
1377
1378     return TRUE;
1379 }
1380
1381
1382 /***********************************************************************
1383  *           SetDCHook   (GDI32.@)
1384  *
1385  * Note: this doesn't exist in Win32, we add it here because user32 needs it.
1386  */
1387 BOOL WINAPI SetDCHook( HDC hdc, DCHOOKPROC hookProc, DWORD_PTR dwHookData )
1388 {
1389     DC *dc = get_dc_ptr( hdc );
1390
1391     if (!dc) return FALSE;
1392
1393     if (!(dc->flags & DC_SAVED))
1394     {
1395         dc->dwHookData = dwHookData;
1396         dc->hookThunk = hookProc;
1397     }
1398     release_dc_ptr( dc );
1399     return TRUE;
1400 }
1401
1402
1403 /***********************************************************************
1404  *           GetDCHook   (GDI32.@)
1405  *
1406  * Note: this doesn't exist in Win32, we add it here because user32 needs it.
1407  */
1408 DWORD_PTR WINAPI GetDCHook( HDC hdc, DCHOOKPROC *proc )
1409 {
1410     DC *dc = get_dc_ptr( hdc );
1411     DWORD_PTR ret;
1412
1413     if (!dc) return 0;
1414     if (proc) *proc = dc->hookThunk;
1415     ret = dc->dwHookData;
1416     release_dc_ptr( dc );
1417     return ret;
1418 }
1419
1420
1421 /* relay function to call the 16-bit DC hook proc */
1422 static BOOL WINAPI call_dc_hook16( HDC hdc, WORD code, DWORD_PTR data, LPARAM lParam )
1423 {
1424     WORD args[6];
1425     DWORD ret = 0;
1426     DC *dc = get_dc_ptr( hdc );
1427
1428     if (!dc) return FALSE;
1429     if (dc->hookProc)
1430     {
1431         args[5] = HDC_16(hdc);
1432         args[4] = code;
1433         args[3] = HIWORD(data);
1434         args[2] = LOWORD(data);
1435         args[1] = HIWORD(lParam);
1436         args[0] = LOWORD(lParam);
1437         WOWCallback16Ex( (DWORD)dc->hookProc, WCB16_PASCAL, sizeof(args), args, &ret );
1438     }
1439     release_dc_ptr( dc );
1440     return LOWORD(ret);
1441 }
1442
1443 /***********************************************************************
1444  *           SetDCHook   (GDI.190)
1445  */
1446 BOOL16 WINAPI SetDCHook16( HDC16 hdc16, FARPROC16 hookProc, DWORD dwHookData )
1447 {
1448     DC *dc = get_dc_ptr( HDC_32(hdc16) );
1449
1450     if (!dc) return FALSE;
1451     if (!(dc->flags & DC_SAVED))
1452     {
1453         dc->dwHookData = dwHookData;
1454         dc->hookThunk = call_dc_hook16;
1455         dc->hookProc = hookProc;
1456     }
1457     release_dc_ptr( dc );
1458     return TRUE;
1459 }
1460
1461
1462 /***********************************************************************
1463  *           GetDCHook   (GDI.191)
1464  */
1465 DWORD WINAPI GetDCHook16( HDC16 hdc16, FARPROC16 *phookProc )
1466 {
1467     HDC hdc = HDC_32( hdc16 );
1468     DC *dc = get_dc_ptr( hdc );
1469     DWORD ret;
1470
1471     if (!dc) return 0;
1472     *phookProc = dc->hookProc;
1473     ret = dc->dwHookData;
1474     release_dc_ptr( dc );
1475     return ret;
1476 }
1477
1478
1479 /***********************************************************************
1480  *           SetHookFlags   (GDI32.@)
1481  *
1482  * Note: this doesn't exist in Win32, we add it here because user32 needs it.
1483  */
1484 WORD WINAPI SetHookFlags( HDC hdc, WORD flags )
1485 {
1486     DC *dc = get_dc_obj( hdc );  /* not get_dc_ptr, this needs to work from any thread */
1487     LONG ret = 0;
1488
1489     if (!dc) return 0;
1490
1491     /* "Undocumented Windows" info is slightly confusing. */
1492
1493     TRACE("hDC %p, flags %04x\n",hdc,flags);
1494
1495     if (flags & DCHF_INVALIDATEVISRGN)
1496         ret = InterlockedExchange( &dc->dirty, 1 );
1497     else if (flags & DCHF_VALIDATEVISRGN || !flags)
1498         ret = InterlockedExchange( &dc->dirty, 0 );
1499
1500     GDI_ReleaseObj( dc );
1501     return ret;
1502 }
1503
1504 /***********************************************************************
1505  *           SetICMMode    (GDI32.@)
1506  */
1507 INT WINAPI SetICMMode(HDC hdc, INT iEnableICM)
1508 {
1509 /*FIXME:  Assume that ICM is always off, and cannot be turned on */
1510     if (iEnableICM == ICM_OFF) return ICM_OFF;
1511     if (iEnableICM == ICM_ON) return 0;
1512     if (iEnableICM == ICM_QUERY) return ICM_OFF;
1513     return 0;
1514 }
1515
1516 /***********************************************************************
1517  *           GetDeviceGammaRamp    (GDI32.@)
1518  */
1519 BOOL WINAPI GetDeviceGammaRamp(HDC hDC, LPVOID ptr)
1520 {
1521     BOOL ret = FALSE;
1522     DC *dc = get_dc_ptr( hDC );
1523
1524     if( dc )
1525     {
1526         if (dc->funcs->pGetDeviceGammaRamp)
1527             ret = dc->funcs->pGetDeviceGammaRamp(dc->physDev, ptr);
1528         release_dc_ptr( dc );
1529     }
1530     return ret;
1531 }
1532
1533 /***********************************************************************
1534  *           SetDeviceGammaRamp    (GDI32.@)
1535  */
1536 BOOL WINAPI SetDeviceGammaRamp(HDC hDC, LPVOID ptr)
1537 {
1538     BOOL ret = FALSE;
1539     DC *dc = get_dc_ptr( hDC );
1540
1541     if( dc )
1542     {
1543         if (dc->funcs->pSetDeviceGammaRamp)
1544             ret = dc->funcs->pSetDeviceGammaRamp(dc->physDev, ptr);
1545         release_dc_ptr( dc );
1546     }
1547     return ret;
1548 }
1549
1550 /***********************************************************************
1551  *           GetColorSpace    (GDI32.@)
1552  */
1553 HCOLORSPACE WINAPI GetColorSpace(HDC hdc)
1554 {
1555 /*FIXME    Need to to whatever GetColorSpace actually does */
1556     return 0;
1557 }
1558
1559 /***********************************************************************
1560  *           CreateColorSpaceA    (GDI32.@)
1561  */
1562 HCOLORSPACE WINAPI CreateColorSpaceA( LPLOGCOLORSPACEA lpLogColorSpace )
1563 {
1564   FIXME( "stub\n" );
1565   return 0;
1566 }
1567
1568 /***********************************************************************
1569  *           CreateColorSpaceW    (GDI32.@)
1570  */
1571 HCOLORSPACE WINAPI CreateColorSpaceW( LPLOGCOLORSPACEW lpLogColorSpace )
1572 {
1573   FIXME( "stub\n" );
1574   return 0;
1575 }
1576
1577 /***********************************************************************
1578  *           DeleteColorSpace     (GDI32.@)
1579  */
1580 BOOL WINAPI DeleteColorSpace( HCOLORSPACE hColorSpace )
1581 {
1582   FIXME( "stub\n" );
1583
1584   return TRUE;
1585 }
1586
1587 /***********************************************************************
1588  *           SetColorSpace     (GDI32.@)
1589  */
1590 HCOLORSPACE WINAPI SetColorSpace( HDC hDC, HCOLORSPACE hColorSpace )
1591 {
1592   FIXME( "stub\n" );
1593
1594   return hColorSpace;
1595 }
1596
1597 /***********************************************************************
1598  *           GetBoundsRect    (GDI32.@)
1599  */
1600 UINT WINAPI GetBoundsRect(HDC hdc, LPRECT rect, UINT flags)
1601 {
1602     UINT ret;
1603     DC *dc = get_dc_ptr( hdc );
1604
1605     if ( !dc ) return 0;
1606
1607     if (rect) *rect = dc->BoundsRect;
1608
1609     ret = ((dc->flags & DC_BOUNDS_SET) ? DCB_SET : DCB_RESET);
1610
1611     if (flags & DCB_RESET)
1612     {
1613         dc->BoundsRect.left   = 0;
1614         dc->BoundsRect.top    = 0;
1615         dc->BoundsRect.right  = 0;
1616         dc->BoundsRect.bottom = 0;
1617         dc->flags &= ~DC_BOUNDS_SET;
1618     }
1619     release_dc_ptr( dc );
1620     return ret;
1621 }
1622
1623
1624 /***********************************************************************
1625  *           SetBoundsRect    (GDI32.@)
1626  */
1627 UINT WINAPI SetBoundsRect(HDC hdc, const RECT* rect, UINT flags)
1628 {
1629     UINT ret;
1630     DC *dc;
1631
1632     if ((flags & DCB_ENABLE) && (flags & DCB_DISABLE)) return 0;
1633     if (!(dc = get_dc_ptr( hdc ))) return 0;
1634
1635     ret = ((dc->flags & DC_BOUNDS_ENABLE) ? DCB_ENABLE : DCB_DISABLE) |
1636           ((dc->flags & DC_BOUNDS_SET) ? DCB_SET : DCB_RESET);
1637
1638     if (flags & DCB_RESET)
1639     {
1640         dc->BoundsRect.left   = 0;
1641         dc->BoundsRect.top    = 0;
1642         dc->BoundsRect.right  = 0;
1643         dc->BoundsRect.bottom = 0;
1644         dc->flags &= ~DC_BOUNDS_SET;
1645     }
1646
1647     if ((flags & DCB_ACCUMULATE) && rect && rect->left < rect->right && rect->top < rect->bottom)
1648     {
1649         if (dc->flags & DC_BOUNDS_SET)
1650         {
1651             dc->BoundsRect.left   = min( dc->BoundsRect.left, rect->left );
1652             dc->BoundsRect.top    = min( dc->BoundsRect.top, rect->top );
1653             dc->BoundsRect.right  = max( dc->BoundsRect.right, rect->right );
1654             dc->BoundsRect.bottom = max( dc->BoundsRect.bottom, rect->bottom );
1655         }
1656         else
1657         {
1658             dc->BoundsRect = *rect;
1659             dc->flags |= DC_BOUNDS_SET;
1660         }
1661     }
1662
1663     if (flags & DCB_ENABLE) dc->flags |= DC_BOUNDS_ENABLE;
1664     if (flags & DCB_DISABLE) dc->flags &= ~DC_BOUNDS_ENABLE;
1665
1666     release_dc_ptr( dc );
1667     return ret;
1668 }
1669
1670
1671 /***********************************************************************
1672  *              GetRelAbs               (GDI32.@)
1673  */
1674 INT WINAPI GetRelAbs( HDC hdc, DWORD dwIgnore )
1675 {
1676     INT ret = 0;
1677     DC *dc = get_dc_ptr( hdc );
1678     if (dc)
1679     {
1680         ret = dc->relAbsMode;
1681         release_dc_ptr( dc );
1682     }
1683     return ret;
1684 }
1685
1686
1687
1688
1689 /***********************************************************************
1690  *              GetBkMode (GDI32.@)
1691  */
1692 INT WINAPI GetBkMode( HDC hdc )
1693 {
1694     INT ret = 0;
1695     DC * dc = get_dc_ptr( hdc );
1696     if (dc)
1697     {
1698         ret = dc->backgroundMode;
1699         release_dc_ptr( dc );
1700     }
1701     return ret;
1702 }
1703
1704
1705 /***********************************************************************
1706  *              SetBkMode (GDI32.@)
1707  */
1708 INT WINAPI SetBkMode( HDC hdc, INT mode )
1709 {
1710     INT ret;
1711     DC *dc;
1712     if ((mode <= 0) || (mode > BKMODE_LAST))
1713     {
1714         SetLastError(ERROR_INVALID_PARAMETER);
1715         return 0;
1716     }
1717     if (!(dc = get_dc_ptr( hdc ))) return 0;
1718
1719     ret = dc->backgroundMode;
1720     if (dc->funcs->pSetBkMode)
1721         if (!dc->funcs->pSetBkMode( dc->physDev, mode ))
1722             ret = 0;
1723     if (ret)
1724         dc->backgroundMode = mode;
1725     release_dc_ptr( dc );
1726     return ret;
1727 }
1728
1729
1730 /***********************************************************************
1731  *              GetROP2 (GDI32.@)
1732  */
1733 INT WINAPI GetROP2( HDC hdc )
1734 {
1735     INT ret = 0;
1736     DC * dc = get_dc_ptr( hdc );
1737     if (dc)
1738     {
1739         ret = dc->ROPmode;
1740         release_dc_ptr( dc );
1741     }
1742     return ret;
1743 }
1744
1745
1746 /***********************************************************************
1747  *              SetROP2 (GDI32.@)
1748  */
1749 INT WINAPI SetROP2( HDC hdc, INT mode )
1750 {
1751     INT ret;
1752     DC *dc;
1753     if ((mode < R2_BLACK) || (mode > R2_WHITE))
1754     {
1755         SetLastError(ERROR_INVALID_PARAMETER);
1756         return 0;
1757     }
1758     if (!(dc = get_dc_ptr( hdc ))) return 0;
1759     ret = dc->ROPmode;
1760     if (dc->funcs->pSetROP2)
1761         if (!dc->funcs->pSetROP2( dc->physDev, mode ))
1762             ret = 0;
1763     if (ret)
1764         dc->ROPmode = mode;
1765     release_dc_ptr( dc );
1766     return ret;
1767 }
1768
1769
1770 /***********************************************************************
1771  *              SetRelAbs (GDI32.@)
1772  */
1773 INT WINAPI SetRelAbs( HDC hdc, INT mode )
1774 {
1775     INT ret;
1776     DC *dc;
1777     if ((mode != ABSOLUTE) && (mode != RELATIVE))
1778     {
1779         SetLastError(ERROR_INVALID_PARAMETER);
1780         return 0;
1781     }
1782     if (!(dc = get_dc_ptr( hdc ))) return 0;
1783     if (dc->funcs->pSetRelAbs)
1784         ret = dc->funcs->pSetRelAbs( dc->physDev, mode );
1785     else
1786     {
1787         ret = dc->relAbsMode;
1788         dc->relAbsMode = mode;
1789     }
1790     release_dc_ptr( dc );
1791     return ret;
1792 }
1793
1794
1795 /***********************************************************************
1796  *              GetPolyFillMode (GDI32.@)
1797  */
1798 INT WINAPI GetPolyFillMode( HDC hdc )
1799 {
1800     INT ret = 0;
1801     DC * dc = get_dc_ptr( hdc );
1802     if (dc)
1803     {
1804         ret = dc->polyFillMode;
1805         release_dc_ptr( dc );
1806     }
1807     return ret;
1808 }
1809
1810
1811 /***********************************************************************
1812  *              SetPolyFillMode (GDI32.@)
1813  */
1814 INT WINAPI SetPolyFillMode( HDC hdc, INT mode )
1815 {
1816     INT ret;
1817     DC *dc;
1818     if ((mode <= 0) || (mode > POLYFILL_LAST))
1819     {
1820         SetLastError(ERROR_INVALID_PARAMETER);
1821         return 0;
1822     }
1823     if (!(dc = get_dc_ptr( hdc ))) return 0;
1824     ret = dc->polyFillMode;
1825     if (dc->funcs->pSetPolyFillMode)
1826         if (!dc->funcs->pSetPolyFillMode( dc->physDev, mode ))
1827             ret = 0;
1828     if (ret)
1829         dc->polyFillMode = mode;
1830     release_dc_ptr( dc );
1831     return ret;
1832 }
1833
1834
1835 /***********************************************************************
1836  *              GetStretchBltMode (GDI32.@)
1837  */
1838 INT WINAPI GetStretchBltMode( HDC hdc )
1839 {
1840     INT ret = 0;
1841     DC * dc = get_dc_ptr( hdc );
1842     if (dc)
1843     {
1844         ret = dc->stretchBltMode;
1845         release_dc_ptr( dc );
1846     }
1847     return ret;
1848 }
1849
1850
1851 /***********************************************************************
1852  *              SetStretchBltMode (GDI32.@)
1853  */
1854 INT WINAPI SetStretchBltMode( HDC hdc, INT mode )
1855 {
1856     INT ret;
1857     DC *dc;
1858     if ((mode <= 0) || (mode > MAXSTRETCHBLTMODE))
1859     {
1860         SetLastError(ERROR_INVALID_PARAMETER);
1861         return 0;
1862     }
1863     if (!(dc = get_dc_ptr( hdc ))) return 0;
1864     ret = dc->stretchBltMode;
1865     if (dc->funcs->pSetStretchBltMode)
1866         if (!dc->funcs->pSetStretchBltMode( dc->physDev, mode ))
1867             ret = 0;
1868     if (ret)
1869         dc->stretchBltMode = mode;
1870     release_dc_ptr( dc );
1871     return ret;
1872 }
1873
1874
1875 /***********************************************************************
1876  *              GetMapMode (GDI32.@)
1877  */
1878 INT WINAPI GetMapMode( HDC hdc )
1879 {
1880     INT ret = 0;
1881     DC * dc = get_dc_ptr( hdc );
1882     if (dc)
1883     {
1884         ret = dc->MapMode;
1885         release_dc_ptr( dc );
1886     }
1887     return ret;
1888 }
1889
1890
1891 /***********************************************************************
1892  *              GetBrushOrgEx (GDI32.@)
1893  */
1894 BOOL WINAPI GetBrushOrgEx( HDC hdc, LPPOINT pt )
1895 {
1896     DC * dc = get_dc_ptr( hdc );
1897     if (!dc) return FALSE;
1898     pt->x = dc->brushOrgX;
1899     pt->y = dc->brushOrgY;
1900     release_dc_ptr( dc );
1901     return TRUE;
1902 }
1903
1904
1905 /***********************************************************************
1906  *              GetCurrentPositionEx (GDI32.@)
1907  */
1908 BOOL WINAPI GetCurrentPositionEx( HDC hdc, LPPOINT pt )
1909 {
1910     DC * dc = get_dc_ptr( hdc );
1911     if (!dc) return FALSE;
1912     pt->x = dc->CursPosX;
1913     pt->y = dc->CursPosY;
1914     release_dc_ptr( dc );
1915     return TRUE;
1916 }
1917
1918
1919 /***********************************************************************
1920  *              GetViewportExtEx (GDI32.@)
1921  */
1922 BOOL WINAPI GetViewportExtEx( HDC hdc, LPSIZE size )
1923 {
1924     DC * dc = get_dc_ptr( hdc );
1925     if (!dc) return FALSE;
1926     size->cx = dc->vportExtX;
1927     size->cy = dc->vportExtY;
1928     release_dc_ptr( dc );
1929     return TRUE;
1930 }
1931
1932
1933 /***********************************************************************
1934  *              GetViewportOrgEx (GDI32.@)
1935  */
1936 BOOL WINAPI GetViewportOrgEx( HDC hdc, LPPOINT pt )
1937 {
1938     DC * dc = get_dc_ptr( hdc );
1939     if (!dc) return FALSE;
1940     pt->x = dc->vportOrgX;
1941     pt->y = dc->vportOrgY;
1942     release_dc_ptr( dc );
1943     return TRUE;
1944 }
1945
1946
1947 /***********************************************************************
1948  *              GetWindowExtEx (GDI32.@)
1949  */
1950 BOOL WINAPI GetWindowExtEx( HDC hdc, LPSIZE size )
1951 {
1952     DC * dc = get_dc_ptr( hdc );
1953     if (!dc) return FALSE;
1954     size->cx = dc->wndExtX;
1955     size->cy = dc->wndExtY;
1956     release_dc_ptr( dc );
1957     return TRUE;
1958 }
1959
1960
1961 /***********************************************************************
1962  *              GetWindowOrgEx (GDI32.@)
1963  */
1964 BOOL WINAPI GetWindowOrgEx( HDC hdc, LPPOINT pt )
1965 {
1966     DC * dc = get_dc_ptr( hdc );
1967     if (!dc) return FALSE;
1968     pt->x = dc->wndOrgX;
1969     pt->y = dc->wndOrgY;
1970     release_dc_ptr( dc );
1971     return TRUE;
1972 }
1973
1974
1975 /***********************************************************************
1976  *              InquireVisRgn   (GDI.131)
1977  */
1978 HRGN16 WINAPI InquireVisRgn16( HDC16 hdc )
1979 {
1980     HRGN16 ret = 0;
1981     DC * dc = get_dc_ptr( HDC_32(hdc) );
1982     if (dc)
1983     {
1984         ret = HRGN_16(dc->hVisRgn);
1985         release_dc_ptr( dc );
1986     }
1987     return ret;
1988 }
1989
1990
1991 /***********************************************************************
1992  *              GetClipRgn (GDI.173)
1993  */
1994 HRGN16 WINAPI GetClipRgn16( HDC16 hdc )
1995 {
1996     HRGN16 ret = 0;
1997     DC * dc = get_dc_ptr( HDC_32(hdc) );
1998     if (dc)
1999     {
2000         ret = HRGN_16(dc->hClipRgn);
2001         release_dc_ptr( dc );
2002     }
2003     return ret;
2004 }
2005
2006
2007 /***********************************************************************
2008  *           GetLayout    (GDI32.@)
2009  *
2010  * Gets left->right or right->left text layout flags of a dc.
2011  *
2012  */
2013 DWORD WINAPI GetLayout(HDC hdc)
2014 {
2015     DWORD layout = GDI_ERROR;
2016
2017     DC * dc = get_dc_ptr( hdc );
2018     if (dc)
2019     {
2020         layout = dc->layout;
2021         release_dc_ptr( dc );
2022     }
2023
2024     TRACE("hdc : %p, layout : %08x\n", hdc, layout);
2025
2026     return layout;
2027 }
2028
2029 /***********************************************************************
2030  *           SetLayout    (GDI32.@)
2031  *
2032  * Sets left->right or right->left text layout flags of a dc.
2033  *
2034  */
2035 DWORD WINAPI SetLayout(HDC hdc, DWORD layout)
2036 {
2037     DWORD oldlayout = GDI_ERROR;
2038
2039     DC * dc = get_dc_ptr( hdc );
2040     if (dc)
2041     {
2042         oldlayout = dc->layout;
2043         dc->layout = layout;
2044         release_dc_ptr( dc );
2045     }
2046
2047     TRACE("hdc : %p, old layout : %08x, new layout : %08x\n", hdc, oldlayout, layout);
2048
2049     return oldlayout;
2050 }
2051
2052 /***********************************************************************
2053  *           GetDCBrushColor    (GDI32.@)
2054  *
2055  * Retrieves the current brush color for the specified device
2056  * context (DC).
2057  *
2058  */
2059 COLORREF WINAPI GetDCBrushColor(HDC hdc)
2060 {
2061     DC *dc;
2062     COLORREF dcBrushColor = CLR_INVALID;
2063
2064     TRACE("hdc(%p)\n", hdc);
2065
2066     dc = get_dc_ptr( hdc );
2067     if (dc)
2068     {
2069         dcBrushColor = dc->dcBrushColor;
2070         release_dc_ptr( dc );
2071     }
2072
2073     return dcBrushColor;
2074 }
2075
2076 /***********************************************************************
2077  *           SetDCBrushColor    (GDI32.@)
2078  *
2079  * Sets the current device context (DC) brush color to the specified
2080  * color value. If the device cannot represent the specified color
2081  * value, the color is set to the nearest physical color.
2082  *
2083  */
2084 COLORREF WINAPI SetDCBrushColor(HDC hdc, COLORREF crColor)
2085 {
2086     DC *dc;
2087     COLORREF oldClr = CLR_INVALID;
2088
2089     TRACE("hdc(%p) crColor(%08x)\n", hdc, crColor);
2090
2091     dc = get_dc_ptr( hdc );
2092     if (dc)
2093     {
2094         if (dc->funcs->pSetDCBrushColor)
2095             crColor = dc->funcs->pSetDCBrushColor( dc->physDev, crColor );
2096         else if (dc->hBrush == GetStockObject( DC_BRUSH ))
2097         {
2098             /* If DC_BRUSH is selected, update driver pen color */
2099             HBRUSH hBrush = CreateSolidBrush( crColor );
2100             dc->funcs->pSelectBrush( dc->physDev, hBrush );
2101             DeleteObject( hBrush );
2102         }
2103
2104         if (crColor != CLR_INVALID)
2105         {
2106             oldClr = dc->dcBrushColor;
2107             dc->dcBrushColor = crColor;
2108         }
2109
2110         release_dc_ptr( dc );
2111     }
2112
2113     return oldClr;
2114 }
2115
2116 /***********************************************************************
2117  *           GetDCPenColor    (GDI32.@)
2118  *
2119  * Retrieves the current pen color for the specified device
2120  * context (DC).
2121  *
2122  */
2123 COLORREF WINAPI GetDCPenColor(HDC hdc)
2124 {
2125     DC *dc;
2126     COLORREF dcPenColor = CLR_INVALID;
2127
2128     TRACE("hdc(%p)\n", hdc);
2129
2130     dc = get_dc_ptr( hdc );
2131     if (dc)
2132     {
2133         dcPenColor = dc->dcPenColor;
2134         release_dc_ptr( dc );
2135     }
2136
2137     return dcPenColor;
2138 }
2139
2140 /***********************************************************************
2141  *           SetDCPenColor    (GDI32.@)
2142  *
2143  * Sets the current device context (DC) pen color to the specified
2144  * color value. If the device cannot represent the specified color
2145  * value, the color is set to the nearest physical color.
2146  *
2147  */
2148 COLORREF WINAPI SetDCPenColor(HDC hdc, COLORREF crColor)
2149 {
2150     DC *dc;
2151     COLORREF oldClr = CLR_INVALID;
2152
2153     TRACE("hdc(%p) crColor(%08x)\n", hdc, crColor);
2154
2155     dc = get_dc_ptr( hdc );
2156     if (dc)
2157     {
2158         if (dc->funcs->pSetDCPenColor)
2159             crColor = dc->funcs->pSetDCPenColor( dc->physDev, crColor );
2160         else if (dc->hPen == GetStockObject( DC_PEN ))
2161         {
2162             /* If DC_PEN is selected, update the driver pen color */
2163             LOGPEN logpen = { PS_SOLID, { 0, 0 }, crColor };
2164             HPEN hPen = CreatePenIndirect( &logpen );
2165             dc->funcs->pSelectPen( dc->physDev, hPen );
2166             DeleteObject( hPen );
2167         }
2168
2169         if (crColor != CLR_INVALID)
2170         {
2171             oldClr = dc->dcPenColor;
2172             dc->dcPenColor = crColor;
2173         }
2174
2175         release_dc_ptr( dc );
2176     }
2177
2178     return oldClr;
2179 }
2180
2181 /***********************************************************************
2182  *           CancelDC    (GDI32.@)
2183  */
2184 BOOL WINAPI CancelDC(HDC hdc)
2185 {
2186     FIXME("stub\n");
2187     return TRUE;
2188 }
2189
2190 /***********************************************************************
2191  *           SetVirtualResolution   (GDI32.@)
2192  *
2193  * Undocumented on msdn.  Called when PowerPoint XP saves a file.
2194  */
2195 DWORD WINAPI SetVirtualResolution(HDC hdc, DWORD dw2, DWORD dw3, DWORD dw4, DWORD dw5)
2196 {
2197     FIXME("(%p %08x %08x %08x %08x): stub!\n", hdc, dw2, dw3, dw4, dw5);
2198     return FALSE;
2199 }
2200
2201 /*******************************************************************
2202  *      GetMiterLimit [GDI32.@]
2203  *
2204  *
2205  */
2206 BOOL WINAPI GetMiterLimit(HDC hdc, PFLOAT peLimit)
2207 {
2208     BOOL bRet = FALSE;
2209     DC *dc;
2210
2211     TRACE("(%p,%p)\n", hdc, peLimit);
2212
2213     dc = get_dc_ptr( hdc );
2214     if (dc)
2215     {
2216         if (peLimit)
2217             *peLimit = dc->miterLimit;
2218
2219         release_dc_ptr( dc );
2220         bRet = TRUE;
2221     }
2222     return bRet;
2223 }
2224
2225 /*******************************************************************
2226  *      SetMiterLimit [GDI32.@]
2227  *
2228  *
2229  */
2230 BOOL WINAPI SetMiterLimit(HDC hdc, FLOAT eNewLimit, PFLOAT peOldLimit)
2231 {
2232     BOOL bRet = FALSE;
2233     DC *dc;
2234
2235     TRACE("(%p,%f,%p)\n", hdc, eNewLimit, peOldLimit);
2236
2237     dc = get_dc_ptr( hdc );
2238     if (dc)
2239     {
2240         if (peOldLimit)
2241             *peOldLimit = dc->miterLimit;
2242         dc->miterLimit = eNewLimit;
2243         release_dc_ptr( dc );
2244         bRet = TRUE;
2245     }
2246     return bRet;
2247 }
2248
2249 /*******************************************************************
2250  *      GdiIsMetaPrintDC [GDI32.@]
2251  */
2252 BOOL WINAPI GdiIsMetaPrintDC(HDC hdc)
2253 {
2254     FIXME("%p\n", hdc);
2255     return FALSE;
2256 }
2257
2258 /*******************************************************************
2259  *      GdiIsMetaFileDC [GDI32.@]
2260  */
2261 BOOL WINAPI GdiIsMetaFileDC(HDC hdc)
2262 {
2263     TRACE("%p\n", hdc);
2264
2265     switch( GetObjectType( hdc ) )
2266     {
2267     case OBJ_METADC:
2268     case OBJ_ENHMETADC:
2269         return TRUE;
2270     }
2271     return FALSE;
2272 }
2273
2274 /*******************************************************************
2275  *      GdiIsPlayMetafileDC [GDI32.@]
2276  */
2277 BOOL WINAPI GdiIsPlayMetafileDC(HDC hdc)
2278 {
2279     FIXME("%p\n", hdc);
2280     return FALSE;
2281 }