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     FLOAT 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     FLOAT scaleX, scaleY;
 294
 295     /* Construct a transformation to do the window-to-viewport conversion */
 296     scaleX = (FLOAT)dc->vportExtX / (FLOAT)dc->wndExtX;
 297     scaleY = (FLOAT)dc->vportExtY / (FLOAT)dc->wndExtY;
 298     xformWnd2Vport.eM11 = scaleX;
 299     xformWnd2Vport.eM12 = 0.0;
 300     xformWnd2Vport.eM21 = 0.0;
 301     xformWnd2Vport.eM22 = scaleY;
 302     xformWnd2Vport.eDx  = (FLOAT)dc->vportOrgX -
 303         scaleX * (FLOAT)dc->wndOrgX;
 304     xformWnd2Vport.eDy  = (FLOAT)dc->vportOrgY -
 305         scaleY * (FLOAT)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     {
 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     else if (hdc) return 0;
 790
 791     if (!funcs && !(funcs = DRIVER_load_driver( displayW ))) return 0;
 792
 793     if (!(dc = alloc_dc_ptr( funcs, MEMORY_DC_MAGIC ))) goto error;
 794
 795     TRACE("(%p): returning %p\n", hdc, dc->hSelf );
 796
 797     dc->hBitmap = GetStockObject( DEFAULT_BITMAP );
 798     if (!(dc->hVisRgn = CreateRectRgn( 0, 0, 1, 1 ))) goto error;   /* default bitmap is 1x1 */
 799
 800     /* Copy the driver-specific physical device info into
 801      * the new DC. The driver may use this read-only info
 802      * while creating the compatible DC below. */
 803     dc->physDev = physDev;
 804     ret = dc->hSelf;
 805
 806     if (dc->funcs->pCreateDC &&
 807         !dc->funcs->pCreateDC( dc->hSelf, &dc->physDev, NULL, NULL, NULL, NULL ))
 808     {
 809         WARN("creation aborted by device\n");
 810         goto error;
 811     }
 812
 813     DC_InitDC( dc );
 814     release_dc_ptr( dc );
 815     return ret;
 816
 817 error:
 818     if (dc && dc->hVisRgn) DeleteObject( dc->hVisRgn );
 819     if (dc) free_dc_ptr( dc );
 820     DRIVER_release_driver( funcs );
 821     return 0;
 822 }
 823
 824
 825 /***********************************************************************
 826  *           DeleteDC    (GDI32.@)
 827  */
 828 BOOL WINAPI DeleteDC( HDC hdc )
 829 {
 830     const DC_FUNCTIONS *funcs = NULL;
 831     DC * dc;
 832
 833     TRACE("%p\n", hdc );
 834
 835     GDI_CheckNotLock();
 836
 837     if (!(dc = get_dc_ptr( hdc ))) return FALSE;
 838     if (dc->refcount != 1)
 839     {
 840         FIXME( "not deleting busy DC %p refcount %u\n", dc->hSelf, dc->refcount );
 841         release_dc_ptr( dc );
 842         return FALSE;
 843     }
 844
 845     /* Call hook procedure to check whether is it OK to delete this DC */
 846     if (dc->hookThunk && !dc->hookThunk( hdc, DCHC_DELETEDC, dc->dwHookData, 0 ))
 847     {
 848         release_dc_ptr( dc );
 849         return FALSE;
 850     }
 851
 852     while (dc->saveLevel)
 853     {
 854         DC * dcs;
 855         HDC hdcs = dc->saved_dc;
 856         if (!(dcs = get_dc_ptr( hdcs ))) break;
 857         dc->saved_dc = dcs->saved_dc;
 858         dc->saveLevel--;
 859         if (dcs->hClipRgn) DeleteObject( dcs->hClipRgn );
 860         if (dcs->hMetaRgn) DeleteObject( dcs->hMetaRgn );
 861         if (dcs->hMetaClipRgn) DeleteObject( dcs->hMetaClipRgn );
 862         if (dcs->hVisRgn) DeleteObject( dcs->hVisRgn );
 863         PATH_DestroyGdiPath(&dcs->path);
 864         free_dc_ptr( dcs );
 865     }
 866
 867     if (!(dc->flags & DC_SAVED))
 868     {
 869         SelectObject( hdc, GetStockObject(BLACK_PEN) );
 870         SelectObject( hdc, GetStockObject(WHITE_BRUSH) );
 871         SelectObject( hdc, GetStockObject(SYSTEM_FONT) );
 872         SelectObject( hdc, GetStockObject(DEFAULT_BITMAP) );
 873         funcs = dc->funcs;
 874         if (dc->funcs->pDeleteDC) dc->funcs->pDeleteDC(dc->physDev);
 875         dc->physDev = NULL;
 876     }
 877
 878     while (dc->saved_visrgn)
 879     {
 880         struct saved_visrgn *next = dc->saved_visrgn->next;
 881         DeleteObject( dc->saved_visrgn->hrgn );
 882         HeapFree( GetProcessHeap(), 0, dc->saved_visrgn );
 883         dc->saved_visrgn = next;
 884     }
 885     if (dc->hClipRgn) DeleteObject( dc->hClipRgn );
 886     if (dc->hMetaRgn) DeleteObject( dc->hMetaRgn );
 887     if (dc->hMetaClipRgn) DeleteObject( dc->hMetaClipRgn );
 888     if (dc->hVisRgn) DeleteObject( dc->hVisRgn );
 889     PATH_DestroyGdiPath(&dc->path);
 890
 891     free_dc_ptr( dc );
 892     if (funcs) DRIVER_release_driver( funcs );  /* do that after releasing the GDI lock */
 893     return TRUE;
 894 }
 895
 896
 897 /***********************************************************************
 898  *           ResetDCW    (GDI32.@)
 899  */
 900 HDC WINAPI ResetDCW( HDC hdc, const DEVMODEW *devmode )
 901 {
 902     DC *dc;
 903     HDC ret = hdc;
 904
 905     if ((dc = get_dc_ptr( hdc )))
 906     {
 907         if (dc->funcs->pResetDC) ret = dc->funcs->pResetDC( dc->physDev, devmode );
 908         release_dc_ptr( dc );
 909     }
 910     return ret;
 911 }
 912
 913
 914 /***********************************************************************
 915  *           ResetDCA    (GDI32.@)
 916  */
 917 HDC WINAPI ResetDCA( HDC hdc, const DEVMODEA *devmode )
 918 {
 919     DEVMODEW *devmodeW;
 920     HDC ret;
 921
 922     if (devmode) devmodeW = GdiConvertToDevmodeW(devmode);
 923     else devmodeW = NULL;
 924
 925     ret = ResetDCW(hdc, devmodeW);
 926
 927     HeapFree(GetProcessHeap(), 0, devmodeW);
 928     return ret;
 929 }
 930
 931
 932 /***********************************************************************
 933  *           GetDeviceCaps    (GDI32.@)
 934  */
 935 INT WINAPI GetDeviceCaps( HDC hdc, INT cap )
 936 {
 937     DC *dc;
 938     INT ret = 0;
 939
 940     if ((dc = get_dc_ptr( hdc )))
 941     {
 942         if (dc->funcs->pGetDeviceCaps) ret = dc->funcs->pGetDeviceCaps( dc->physDev, cap );
 943         else switch(cap)  /* return meaningful values for some entries */
 944         {
 945         case HORZRES:     ret = 640; break;
 946         case VERTRES:     ret = 480; break;
 947         case BITSPIXEL:   ret = 1; break;
 948         case PLANES:      ret = 1; break;
 949         case NUMCOLORS:   ret = 2; break;
 950         case ASPECTX:     ret = 36; break;
 951         case ASPECTY:     ret = 36; break;
 952         case ASPECTXY:    ret = 51; break;
 953         case LOGPIXELSX:  ret = 72; break;
 954         case LOGPIXELSY:  ret = 72; break;
 955         case SIZEPALETTE: ret = 2; break;
 956         }
 957         release_dc_ptr( dc );
 958     }
 959     return ret;
 960 }
 961
 962
 963 /***********************************************************************
 964  *              GetBkColor (GDI32.@)
 965  */
 966 COLORREF WINAPI GetBkColor( HDC hdc )
 967 {
 968     COLORREF ret = 0;
 969     DC * dc = get_dc_ptr( hdc );
 970     if (dc)
 971     {
 972         ret = dc->backgroundColor;
 973         release_dc_ptr( dc );
 974     }
 975     return ret;
 976 }
 977
 978
 979 /***********************************************************************
 980  *           SetBkColor    (GDI32.@)
 981  */
 982 COLORREF WINAPI SetBkColor( HDC hdc, COLORREF color )
 983 {
 984     COLORREF oldColor;
 985     DC * dc = get_dc_ptr( hdc );
 986
 987     TRACE("hdc=%p color=0x%08x\n", hdc, color);
 988
 989     if (!dc) return CLR_INVALID;
 990     oldColor = dc->backgroundColor;
 991     if (dc->funcs->pSetBkColor)
 992     {
 993         color = dc->funcs->pSetBkColor(dc->physDev, color);
 994         if (color == CLR_INVALID)  /* don't change it */
 995         {
 996             color = oldColor;
 997             oldColor = CLR_INVALID;
 998         }
 999     }
1000     dc->backgroundColor = color;
1001     release_dc_ptr( dc );
1002     return oldColor;
1003 }
1004
1005
1006 /***********************************************************************
1007  *              GetTextColor (GDI32.@)
1008  */
1009 COLORREF WINAPI GetTextColor( HDC hdc )
1010 {
1011     COLORREF ret = 0;
1012     DC * dc = get_dc_ptr( hdc );
1013     if (dc)
1014     {
1015         ret = dc->textColor;
1016         release_dc_ptr( dc );
1017     }
1018     return ret;
1019 }
1020
1021
1022 /***********************************************************************
1023  *           SetTextColor    (GDI32.@)
1024  */
1025 COLORREF WINAPI SetTextColor( HDC hdc, COLORREF color )
1026 {
1027     COLORREF oldColor;
1028     DC * dc = get_dc_ptr( hdc );
1029
1030     TRACE(" hdc=%p color=0x%08x\n", hdc, color);
1031
1032     if (!dc) return CLR_INVALID;
1033     oldColor = dc->textColor;
1034     if (dc->funcs->pSetTextColor)
1035     {
1036         color = dc->funcs->pSetTextColor(dc->physDev, color);
1037         if (color == CLR_INVALID)  /* don't change it */
1038         {
1039             color = oldColor;
1040             oldColor = CLR_INVALID;
1041         }
1042     }
1043     dc->textColor = color;
1044     release_dc_ptr( dc );
1045     return oldColor;
1046 }
1047
1048
1049 /***********************************************************************
1050  *              GetTextAlign (GDI32.@)
1051  */
1052 UINT WINAPI GetTextAlign( HDC hdc )
1053 {
1054     UINT ret = 0;
1055     DC * dc = get_dc_ptr( hdc );
1056     if (dc)
1057     {
1058         ret = dc->textAlign;
1059         release_dc_ptr( dc );
1060     }
1061     return ret;
1062 }
1063
1064
1065 /***********************************************************************
1066  *           SetTextAlign    (GDI32.@)
1067  */
1068 UINT WINAPI SetTextAlign( HDC hdc, UINT align )
1069 {
1070     UINT ret;
1071     DC *dc = get_dc_ptr( hdc );
1072
1073     TRACE("hdc=%p align=%d\n", hdc, align);
1074
1075     if (!dc) return 0x0;
1076     ret = dc->textAlign;
1077     if (dc->funcs->pSetTextAlign)
1078         if (!dc->funcs->pSetTextAlign(dc->physDev, align))
1079             ret = GDI_ERROR;
1080     if (ret != GDI_ERROR)
1081         dc->textAlign = align;
1082     release_dc_ptr( dc );
1083     return ret;
1084 }
1085
1086 /***********************************************************************
1087  *           GetDCOrgEx  (GDI32.@)
1088  */
1089 BOOL WINAPI GetDCOrgEx( HDC hDC, LPPOINT lpp )
1090 {
1091     DC * dc;
1092
1093     if (!lpp) return FALSE;
1094     if (!(dc = get_dc_ptr( hDC ))) return FALSE;
1095
1096     lpp->x = lpp->y = 0;
1097     if (dc->funcs->pGetDCOrgEx) dc->funcs->pGetDCOrgEx( dc->physDev, lpp );
1098     release_dc_ptr( dc );
1099     return TRUE;
1100 }
1101
1102
1103 /***********************************************************************
1104  *           SetDCOrg   (GDI.117)
1105  */
1106 DWORD WINAPI SetDCOrg16( HDC16 hdc16, INT16 x, INT16 y )
1107 {
1108     DWORD prevOrg = 0;
1109     HDC hdc = HDC_32( hdc16 );
1110     DC *dc = get_dc_ptr( hdc );
1111     if (!dc) return 0;
1112     if (dc->funcs->pSetDCOrg) prevOrg = dc->funcs->pSetDCOrg( dc->physDev, x, y );
1113     release_dc_ptr( dc );
1114     return prevOrg;
1115 }
1116
1117
1118 /***********************************************************************
1119  *              GetGraphicsMode (GDI32.@)
1120  */
1121 INT WINAPI GetGraphicsMode( HDC hdc )
1122 {
1123     INT ret = 0;
1124     DC * dc = get_dc_ptr( hdc );
1125     if (dc)
1126     {
1127         ret = dc->GraphicsMode;
1128         release_dc_ptr( dc );
1129     }
1130     return ret;
1131 }
1132
1133
1134 /***********************************************************************
1135  *           SetGraphicsMode    (GDI32.@)
1136  */
1137 INT WINAPI SetGraphicsMode( HDC hdc, INT mode )
1138 {
1139     INT ret = 0;
1140     DC *dc = get_dc_ptr( hdc );
1141
1142     /* One would think that setting the graphics mode to GM_COMPATIBLE
1143      * would also reset the world transformation matrix to the unity
1144      * matrix. However, in Windows, this is not the case. This doesn't
1145      * make a lot of sense to me, but that's the way it is.
1146      */
1147     if (!dc) return 0;
1148     if ((mode > 0) && (mode <= GM_LAST))
1149     {
1150         ret = dc->GraphicsMode;
1151         dc->GraphicsMode = mode;
1152     }
1153     release_dc_ptr( dc );
1154     return ret;
1155 }
1156
1157
1158 /***********************************************************************
1159  *              GetArcDirection (GDI32.@)
1160  */
1161 INT WINAPI GetArcDirection( HDC hdc )
1162 {
1163     INT ret = 0;
1164     DC * dc = get_dc_ptr( hdc );
1165     if (dc)
1166     {
1167         ret = dc->ArcDirection;
1168         release_dc_ptr( dc );
1169     }
1170     return ret;
1171 }
1172
1173
1174 /***********************************************************************
1175  *           SetArcDirection    (GDI32.@)
1176  */
1177 INT WINAPI SetArcDirection( HDC hdc, INT nDirection )
1178 {
1179     DC * dc;
1180     INT nOldDirection = 0;
1181
1182     if (nDirection!=AD_COUNTERCLOCKWISE && nDirection!=AD_CLOCKWISE)
1183     {
1184         SetLastError(ERROR_INVALID_PARAMETER);
1185         return 0;
1186     }
1187
1188     if ((dc = get_dc_ptr( hdc )))
1189     {
1190         if (dc->funcs->pSetArcDirection)
1191         {
1192             dc->funcs->pSetArcDirection(dc->physDev, nDirection);
1193         }
1194         nOldDirection = dc->ArcDirection;
1195         dc->ArcDirection = nDirection;
1196         release_dc_ptr( dc );
1197     }
1198     return nOldDirection;
1199 }
1200
1201
1202 /***********************************************************************
1203  *           GetWorldTransform    (GDI32.@)
1204  */
1205 BOOL WINAPI GetWorldTransform( HDC hdc, LPXFORM xform )
1206 {
1207     DC * dc;
1208     if (!xform) return FALSE;
1209     if (!(dc = get_dc_ptr( hdc ))) return FALSE;
1210     *xform = dc->xformWorld2Wnd;
1211     release_dc_ptr( dc );
1212     return TRUE;
1213 }
1214
1215
1216 /***********************************************************************
1217  *           GetTransform    (GDI32.@)
1218  */
1219 BOOL WINAPI GetTransform( HDC hdc, DWORD unknown, LPXFORM xform )
1220 {
1221     if (unknown == 0x0203) return GetWorldTransform( hdc, xform );
1222     FIXME("stub: don't know what to do for code %x\n", unknown );
1223     return FALSE;
1224 }
1225
1226
1227 /***********************************************************************
1228  *           SetWorldTransform    (GDI32.@)
1229  */
1230 BOOL WINAPI SetWorldTransform( HDC hdc, const XFORM *xform )
1231 {
1232     BOOL ret = FALSE;
1233     DC *dc = get_dc_ptr( hdc );
1234
1235     if (!dc) return FALSE;
1236     if (!xform) goto done;
1237
1238     /* Check that graphics mode is GM_ADVANCED */
1239     if (dc->GraphicsMode!=GM_ADVANCED) goto done;
1240
1241     if (dc->funcs->pSetWorldTransform)
1242     {
1243         ret = dc->funcs->pSetWorldTransform(dc->physDev, xform);
1244         if (!ret) goto done;
1245     }
1246
1247     dc->xformWorld2Wnd = *xform;
1248     DC_UpdateXforms( dc );
1249     ret = TRUE;
1250  done:
1251     release_dc_ptr( dc );
1252     return ret;
1253 }
1254
1255
1256 /****************************************************************************
1257  * ModifyWorldTransform [GDI32.@]
1258  * Modifies the world transformation for a device context.
1259  *
1260  * PARAMS
1261  *    hdc   [I] Handle to device context
1262  *    xform [I] XFORM structure that will be used to modify the world
1263  *              transformation
1264  *    iMode [I] Specifies in what way to modify the world transformation
1265  *              Possible values:
1266  *              MWT_IDENTITY
1267  *                 Resets the world transformation to the identity matrix.
1268  *                 The parameter xform is ignored.
1269  *              MWT_LEFTMULTIPLY
1270  *                 Multiplies xform into the world transformation matrix from
1271  *                 the left.
1272  *              MWT_RIGHTMULTIPLY
1273  *                 Multiplies xform into the world transformation matrix from
1274  *                 the right.
1275  *
1276  * RETURNS
1277  *  Success: TRUE.
1278  *  Failure: FALSE. Use GetLastError() to determine the cause.
1279  */
1280 BOOL WINAPI ModifyWorldTransform( HDC hdc, const XFORM *xform,
1281     DWORD iMode )
1282 {
1283     BOOL ret = FALSE;
1284     DC *dc = get_dc_ptr( hdc );
1285
1286     /* Check for illegal parameters */
1287     if (!dc) return FALSE;
1288     if (!xform && iMode != MWT_IDENTITY) goto done;
1289
1290     /* Check that graphics mode is GM_ADVANCED */
1291     if (dc->GraphicsMode!=GM_ADVANCED) goto done;
1292
1293     if (dc->funcs->pModifyWorldTransform)
1294     {
1295         ret = dc->funcs->pModifyWorldTransform(dc->physDev, xform, iMode);
1296         if (!ret) goto done;
1297     }
1298
1299     switch (iMode)
1300     {
1301         case MWT_IDENTITY:
1302             dc->xformWorld2Wnd.eM11 = 1.0f;
1303             dc->xformWorld2Wnd.eM12 = 0.0f;
1304             dc->xformWorld2Wnd.eM21 = 0.0f;
1305             dc->xformWorld2Wnd.eM22 = 1.0f;
1306             dc->xformWorld2Wnd.eDx  = 0.0f;
1307             dc->xformWorld2Wnd.eDy  = 0.0f;
1308             break;
1309         case MWT_LEFTMULTIPLY:
1310             CombineTransform( &dc->xformWorld2Wnd, xform,
1311                 &dc->xformWorld2Wnd );
1312             break;
1313         case MWT_RIGHTMULTIPLY:
1314             CombineTransform( &dc->xformWorld2Wnd, &dc->xformWorld2Wnd,
1315                 xform );
1316             break;
1317         default:
1318             goto done;
1319     }
1320
1321     DC_UpdateXforms( dc );
1322     ret = TRUE;
1323  done:
1324     release_dc_ptr( dc );
1325     return ret;
1326 }
1327
1328
1329 /****************************************************************************
1330  * CombineTransform [GDI32.@]
1331  * Combines two transformation matrices.
1332  *
1333  * PARAMS
1334  *    xformResult [O] Stores the result of combining the two matrices
1335  *    xform1      [I] Specifies the first matrix to apply
1336  *    xform2      [I] Specifies the second matrix to apply
1337  *
1338  * REMARKS
1339  *    The same matrix can be passed in for more than one of the parameters.
1340  *
1341  * RETURNS
1342  *  Success: TRUE.
1343  *  Failure: FALSE. Use GetLastError() to determine the cause.
1344  */
1345 BOOL WINAPI CombineTransform( LPXFORM xformResult, const XFORM *xform1,
1346     const XFORM *xform2 )
1347 {
1348     XFORM xformTemp;
1349
1350     /* Check for illegal parameters */
1351     if (!xformResult || !xform1 || !xform2)
1352         return FALSE;
1353
1354     /* Create the result in a temporary XFORM, since xformResult may be
1355      * equal to xform1 or xform2 */
1356     xformTemp.eM11 = xform1->eM11 * xform2->eM11 +
1357                      xform1->eM12 * xform2->eM21;
1358     xformTemp.eM12 = xform1->eM11 * xform2->eM12 +
1359                      xform1->eM12 * xform2->eM22;
1360     xformTemp.eM21 = xform1->eM21 * xform2->eM11 +
1361                      xform1->eM22 * xform2->eM21;
1362     xformTemp.eM22 = xform1->eM21 * xform2->eM12 +
1363                      xform1->eM22 * xform2->eM22;
1364     xformTemp.eDx  = xform1->eDx  * xform2->eM11 +
1365                      xform1->eDy  * xform2->eM21 +
1366                      xform2->eDx;
1367     xformTemp.eDy  = xform1->eDx  * xform2->eM12 +
1368                      xform1->eDy  * xform2->eM22 +
1369                      xform2->eDy;
1370
1371     /* Copy the result to xformResult */
1372     *xformResult = xformTemp;
1373
1374     return TRUE;
1375 }
1376
1377
1378 /***********************************************************************
1379  *           SetDCHook   (GDI32.@)
1380  *
1381  * Note: this doesn't exist in Win32, we add it here because user32 needs it.
1382  */
1383 BOOL WINAPI SetDCHook( HDC hdc, DCHOOKPROC hookProc, DWORD_PTR dwHookData )
1384 {
1385     DC *dc = get_dc_ptr( hdc );
1386
1387     if (!dc) return FALSE;
1388
1389     if (!(dc->flags & DC_SAVED))
1390     {
1391         dc->dwHookData = dwHookData;
1392         dc->hookThunk = hookProc;
1393     }
1394     release_dc_ptr( dc );
1395     return TRUE;
1396 }
1397
1398
1399 /***********************************************************************
1400  *           GetDCHook   (GDI32.@)
1401  *
1402  * Note: this doesn't exist in Win32, we add it here because user32 needs it.
1403  */
1404 DWORD_PTR WINAPI GetDCHook( HDC hdc, DCHOOKPROC *proc )
1405 {
1406     DC *dc = get_dc_ptr( hdc );
1407     DWORD_PTR ret;
1408
1409     if (!dc) return 0;
1410     if (proc) *proc = dc->hookThunk;
1411     ret = dc->dwHookData;
1412     release_dc_ptr( dc );
1413     return ret;
1414 }
1415
1416
1417 /* relay function to call the 16-bit DC hook proc */
1418 static BOOL WINAPI call_dc_hook16( HDC hdc, WORD code, DWORD_PTR data, LPARAM lParam )
1419 {
1420     WORD args[6];
1421     DWORD ret = 0;
1422     DC *dc = get_dc_ptr( hdc );
1423
1424     if (!dc) return FALSE;
1425     if (dc->hookProc)
1426     {
1427         args[5] = HDC_16(hdc);
1428         args[4] = code;
1429         args[3] = HIWORD(data);
1430         args[2] = LOWORD(data);
1431         args[1] = HIWORD(lParam);
1432         args[0] = LOWORD(lParam);
1433         WOWCallback16Ex( (DWORD)dc->hookProc, WCB16_PASCAL, sizeof(args), args, &ret );
1434     }
1435     release_dc_ptr( dc );
1436     return LOWORD(ret);
1437 }
1438
1439 /***********************************************************************
1440  *           SetDCHook   (GDI.190)
1441  */
1442 BOOL16 WINAPI SetDCHook16( HDC16 hdc16, FARPROC16 hookProc, DWORD dwHookData )
1443 {
1444     DC *dc = get_dc_ptr( HDC_32(hdc16) );
1445
1446     if (!dc) return FALSE;
1447     if (!(dc->flags & DC_SAVED))
1448     {
1449         dc->dwHookData = dwHookData;
1450         dc->hookThunk = call_dc_hook16;
1451         dc->hookProc = hookProc;
1452     }
1453     release_dc_ptr( dc );
1454     return TRUE;
1455 }
1456
1457
1458 /***********************************************************************
1459  *           GetDCHook   (GDI.191)
1460  */
1461 DWORD WINAPI GetDCHook16( HDC16 hdc16, FARPROC16 *phookProc )
1462 {
1463     HDC hdc = HDC_32( hdc16 );
1464     DC *dc = get_dc_ptr( hdc );
1465     DWORD ret;
1466
1467     if (!dc) return 0;
1468     *phookProc = dc->hookProc;
1469     ret = dc->dwHookData;
1470     release_dc_ptr( dc );
1471     return ret;
1472 }
1473
1474
1475 /***********************************************************************
1476  *           SetHookFlags   (GDI32.@)
1477  *
1478  * Note: this doesn't exist in Win32, we add it here because user32 needs it.
1479  */
1480 WORD WINAPI SetHookFlags( HDC hdc, WORD flags )
1481 {
1482     DC *dc = get_dc_obj( hdc );  /* not get_dc_ptr, this needs to work from any thread */
1483     LONG ret = 0;
1484
1485     if (!dc) return 0;
1486
1487     /* "Undocumented Windows" info is slightly confusing. */
1488
1489     TRACE("hDC %p, flags %04x\n",hdc,flags);
1490
1491     if (flags & DCHF_INVALIDATEVISRGN)
1492         ret = InterlockedExchange( &dc->dirty, 1 );
1493     else if (flags & DCHF_VALIDATEVISRGN || !flags)
1494         ret = InterlockedExchange( &dc->dirty, 0 );
1495
1496     GDI_ReleaseObj( dc );
1497     return ret;
1498 }
1499
1500 /***********************************************************************
1501  *           SetICMMode    (GDI32.@)
1502  */
1503 INT WINAPI SetICMMode(HDC hdc, INT iEnableICM)
1504 {
1505 /*FIXME:  Assume that ICM is always off, and cannot be turned on */
1506     if (iEnableICM == ICM_OFF) return ICM_OFF;
1507     if (iEnableICM == ICM_ON) return 0;
1508     if (iEnableICM == ICM_QUERY) return ICM_OFF;
1509     return 0;
1510 }
1511
1512 /***********************************************************************
1513  *           GetDeviceGammaRamp    (GDI32.@)
1514  */
1515 BOOL WINAPI GetDeviceGammaRamp(HDC hDC, LPVOID ptr)
1516 {
1517     BOOL ret = FALSE;
1518     DC *dc = get_dc_ptr( hDC );
1519
1520     if( dc )
1521     {
1522         if (dc->funcs->pGetDeviceGammaRamp)
1523             ret = dc->funcs->pGetDeviceGammaRamp(dc->physDev, ptr);
1524         release_dc_ptr( dc );
1525     }
1526     return ret;
1527 }
1528
1529 /***********************************************************************
1530  *           SetDeviceGammaRamp    (GDI32.@)
1531  */
1532 BOOL WINAPI SetDeviceGammaRamp(HDC hDC, LPVOID ptr)
1533 {
1534     BOOL ret = FALSE;
1535     DC *dc = get_dc_ptr( hDC );
1536
1537     if( dc )
1538     {
1539         if (dc->funcs->pSetDeviceGammaRamp)
1540             ret = dc->funcs->pSetDeviceGammaRamp(dc->physDev, ptr);
1541         release_dc_ptr( dc );
1542     }
1543     return ret;
1544 }
1545
1546 /***********************************************************************
1547  *           GetColorSpace    (GDI32.@)
1548  */
1549 HCOLORSPACE WINAPI GetColorSpace(HDC hdc)
1550 {
1551 /*FIXME    Need to to whatever GetColorSpace actually does */
1552     return 0;
1553 }
1554
1555 /***********************************************************************
1556  *           CreateColorSpaceA    (GDI32.@)
1557  */
1558 HCOLORSPACE WINAPI CreateColorSpaceA( LPLOGCOLORSPACEA lpLogColorSpace )
1559 {
1560   FIXME( "stub\n" );
1561   return 0;
1562 }
1563
1564 /***********************************************************************
1565  *           CreateColorSpaceW    (GDI32.@)
1566  */
1567 HCOLORSPACE WINAPI CreateColorSpaceW( LPLOGCOLORSPACEW lpLogColorSpace )
1568 {
1569   FIXME( "stub\n" );
1570   return 0;
1571 }
1572
1573 /***********************************************************************
1574  *           DeleteColorSpace     (GDI32.@)
1575  */
1576 BOOL WINAPI DeleteColorSpace( HCOLORSPACE hColorSpace )
1577 {
1578   FIXME( "stub\n" );
1579
1580   return TRUE;
1581 }
1582
1583 /***********************************************************************
1584  *           SetColorSpace     (GDI32.@)
1585  */
1586 HCOLORSPACE WINAPI SetColorSpace( HDC hDC, HCOLORSPACE hColorSpace )
1587 {
1588   FIXME( "stub\n" );
1589
1590   return hColorSpace;
1591 }
1592
1593 /***********************************************************************
1594  *           GetBoundsRect    (GDI32.@)
1595  */
1596 UINT WINAPI GetBoundsRect(HDC hdc, LPRECT rect, UINT flags)
1597 {
1598     UINT ret;
1599     DC *dc = get_dc_ptr( hdc );
1600
1601     if ( !dc ) return 0;
1602
1603     if (rect) *rect = dc->BoundsRect;
1604
1605     ret = ((dc->flags & DC_BOUNDS_SET) ? DCB_SET : DCB_RESET);
1606
1607     if (flags & DCB_RESET)
1608     {
1609         dc->BoundsRect.left   = 0;
1610         dc->BoundsRect.top    = 0;
1611         dc->BoundsRect.right  = 0;
1612         dc->BoundsRect.bottom = 0;
1613         dc->flags &= ~DC_BOUNDS_SET;
1614     }
1615     release_dc_ptr( dc );
1616     return ret;
1617 }
1618
1619
1620 /***********************************************************************
1621  *           SetBoundsRect    (GDI32.@)
1622  */
1623 UINT WINAPI SetBoundsRect(HDC hdc, const RECT* rect, UINT flags)
1624 {
1625     UINT ret;
1626     DC *dc;
1627
1628     if ((flags & DCB_ENABLE) && (flags & DCB_DISABLE)) return 0;
1629     if (!(dc = get_dc_ptr( hdc ))) return 0;
1630
1631     ret = ((dc->flags & DC_BOUNDS_ENABLE) ? DCB_ENABLE : DCB_DISABLE) |
1632           ((dc->flags & DC_BOUNDS_SET) ? DCB_SET : DCB_RESET);
1633
1634     if (flags & DCB_RESET)
1635     {
1636         dc->BoundsRect.left   = 0;
1637         dc->BoundsRect.top    = 0;
1638         dc->BoundsRect.right  = 0;
1639         dc->BoundsRect.bottom = 0;
1640         dc->flags &= ~DC_BOUNDS_SET;
1641     }
1642
1643     if ((flags & DCB_ACCUMULATE) && rect && rect->left < rect->right && rect->top < rect->bottom)
1644     {
1645         if (dc->flags & DC_BOUNDS_SET)
1646         {
1647             dc->BoundsRect.left   = min( dc->BoundsRect.left, rect->left );
1648             dc->BoundsRect.top    = min( dc->BoundsRect.top, rect->top );
1649             dc->BoundsRect.right  = max( dc->BoundsRect.right, rect->right );
1650             dc->BoundsRect.bottom = max( dc->BoundsRect.bottom, rect->bottom );
1651         }
1652         else
1653         {
1654             dc->BoundsRect = *rect;
1655             dc->flags |= DC_BOUNDS_SET;
1656         }
1657     }
1658
1659     if (flags & DCB_ENABLE) dc->flags |= DC_BOUNDS_ENABLE;
1660     if (flags & DCB_DISABLE) dc->flags &= ~DC_BOUNDS_ENABLE;
1661
1662     release_dc_ptr( dc );
1663     return ret;
1664 }
1665
1666
1667 /***********************************************************************
1668  *              GetRelAbs               (GDI32.@)
1669  */
1670 INT WINAPI GetRelAbs( HDC hdc, DWORD dwIgnore )
1671 {
1672     INT ret = 0;
1673     DC *dc = get_dc_ptr( hdc );
1674     if (dc)
1675     {
1676         ret = dc->relAbsMode;
1677         release_dc_ptr( dc );
1678     }
1679     return ret;
1680 }
1681
1682
1683
1684
1685 /***********************************************************************
1686  *              GetBkMode (GDI32.@)
1687  */
1688 INT WINAPI GetBkMode( HDC hdc )
1689 {
1690     INT ret = 0;
1691     DC * dc = get_dc_ptr( hdc );
1692     if (dc)
1693     {
1694         ret = dc->backgroundMode;
1695         release_dc_ptr( dc );
1696     }
1697     return ret;
1698 }
1699
1700
1701 /***********************************************************************
1702  *              SetBkMode (GDI32.@)
1703  */
1704 INT WINAPI SetBkMode( HDC hdc, INT mode )
1705 {
1706     INT ret;
1707     DC *dc;
1708     if ((mode <= 0) || (mode > BKMODE_LAST))
1709     {
1710         SetLastError(ERROR_INVALID_PARAMETER);
1711         return 0;
1712     }
1713     if (!(dc = get_dc_ptr( hdc ))) return 0;
1714
1715     ret = dc->backgroundMode;
1716     if (dc->funcs->pSetBkMode)
1717         if (!dc->funcs->pSetBkMode( dc->physDev, mode ))
1718             ret = 0;
1719     if (ret)
1720         dc->backgroundMode = mode;
1721     release_dc_ptr( dc );
1722     return ret;
1723 }
1724
1725
1726 /***********************************************************************
1727  *              GetROP2 (GDI32.@)
1728  */
1729 INT WINAPI GetROP2( HDC hdc )
1730 {
1731     INT ret = 0;
1732     DC * dc = get_dc_ptr( hdc );
1733     if (dc)
1734     {
1735         ret = dc->ROPmode;
1736         release_dc_ptr( dc );
1737     }
1738     return ret;
1739 }
1740
1741
1742 /***********************************************************************
1743  *              SetROP2 (GDI32.@)
1744  */
1745 INT WINAPI SetROP2( HDC hdc, INT mode )
1746 {
1747     INT ret;
1748     DC *dc;
1749     if ((mode < R2_BLACK) || (mode > R2_WHITE))
1750     {
1751         SetLastError(ERROR_INVALID_PARAMETER);
1752         return 0;
1753     }
1754     if (!(dc = get_dc_ptr( hdc ))) return 0;
1755     ret = dc->ROPmode;
1756     if (dc->funcs->pSetROP2)
1757         if (!dc->funcs->pSetROP2( dc->physDev, mode ))
1758             ret = 0;
1759     if (ret)
1760         dc->ROPmode = mode;
1761     release_dc_ptr( dc );
1762     return ret;
1763 }
1764
1765
1766 /***********************************************************************
1767  *              SetRelAbs (GDI32.@)
1768  */
1769 INT WINAPI SetRelAbs( HDC hdc, INT mode )
1770 {
1771     INT ret;
1772     DC *dc;
1773     if ((mode != ABSOLUTE) && (mode != RELATIVE))
1774     {
1775         SetLastError(ERROR_INVALID_PARAMETER);
1776         return 0;
1777     }
1778     if (!(dc = get_dc_ptr( hdc ))) return 0;
1779     if (dc->funcs->pSetRelAbs)
1780         ret = dc->funcs->pSetRelAbs( dc->physDev, mode );
1781     else
1782     {
1783         ret = dc->relAbsMode;
1784         dc->relAbsMode = mode;
1785     }
1786     release_dc_ptr( dc );
1787     return ret;
1788 }
1789
1790
1791 /***********************************************************************
1792  *              GetPolyFillMode (GDI32.@)
1793  */
1794 INT WINAPI GetPolyFillMode( HDC hdc )
1795 {
1796     INT ret = 0;
1797     DC * dc = get_dc_ptr( hdc );
1798     if (dc)
1799     {
1800         ret = dc->polyFillMode;
1801         release_dc_ptr( dc );
1802     }
1803     return ret;
1804 }
1805
1806
1807 /***********************************************************************
1808  *              SetPolyFillMode (GDI32.@)
1809  */
1810 INT WINAPI SetPolyFillMode( HDC hdc, INT mode )
1811 {
1812     INT ret;
1813     DC *dc;
1814     if ((mode <= 0) || (mode > POLYFILL_LAST))
1815     {
1816         SetLastError(ERROR_INVALID_PARAMETER);
1817         return 0;
1818     }
1819     if (!(dc = get_dc_ptr( hdc ))) return 0;
1820     ret = dc->polyFillMode;
1821     if (dc->funcs->pSetPolyFillMode)
1822         if (!dc->funcs->pSetPolyFillMode( dc->physDev, mode ))
1823             ret = 0;
1824     if (ret)
1825         dc->polyFillMode = mode;
1826     release_dc_ptr( dc );
1827     return ret;
1828 }
1829
1830
1831 /***********************************************************************
1832  *              GetStretchBltMode (GDI32.@)
1833  */
1834 INT WINAPI GetStretchBltMode( HDC hdc )
1835 {
1836     INT ret = 0;
1837     DC * dc = get_dc_ptr( hdc );
1838     if (dc)
1839     {
1840         ret = dc->stretchBltMode;
1841         release_dc_ptr( dc );
1842     }
1843     return ret;
1844 }
1845
1846
1847 /***********************************************************************
1848  *              SetStretchBltMode (GDI32.@)
1849  */
1850 INT WINAPI SetStretchBltMode( HDC hdc, INT mode )
1851 {
1852     INT ret;
1853     DC *dc;
1854     if ((mode <= 0) || (mode > MAXSTRETCHBLTMODE))
1855     {
1856         SetLastError(ERROR_INVALID_PARAMETER);
1857         return 0;
1858     }
1859     if (!(dc = get_dc_ptr( hdc ))) return 0;
1860     ret = dc->stretchBltMode;
1861     if (dc->funcs->pSetStretchBltMode)
1862         if (!dc->funcs->pSetStretchBltMode( dc->physDev, mode ))
1863             ret = 0;
1864     if (ret)
1865         dc->stretchBltMode = mode;
1866     release_dc_ptr( dc );
1867     return ret;
1868 }
1869
1870
1871 /***********************************************************************
1872  *              GetMapMode (GDI32.@)
1873  */
1874 INT WINAPI GetMapMode( HDC hdc )
1875 {
1876     INT ret = 0;
1877     DC * dc = get_dc_ptr( hdc );
1878     if (dc)
1879     {
1880         ret = dc->MapMode;
1881         release_dc_ptr( dc );
1882     }
1883     return ret;
1884 }
1885
1886
1887 /***********************************************************************
1888  *              GetBrushOrgEx (GDI32.@)
1889  */
1890 BOOL WINAPI GetBrushOrgEx( HDC hdc, LPPOINT pt )
1891 {
1892     DC * dc = get_dc_ptr( hdc );
1893     if (!dc) return FALSE;
1894     pt->x = dc->brushOrgX;
1895     pt->y = dc->brushOrgY;
1896     release_dc_ptr( dc );
1897     return TRUE;
1898 }
1899
1900
1901 /***********************************************************************
1902  *              GetCurrentPositionEx (GDI32.@)
1903  */
1904 BOOL WINAPI GetCurrentPositionEx( HDC hdc, LPPOINT pt )
1905 {
1906     DC * dc = get_dc_ptr( hdc );
1907     if (!dc) return FALSE;
1908     pt->x = dc->CursPosX;
1909     pt->y = dc->CursPosY;
1910     release_dc_ptr( dc );
1911     return TRUE;
1912 }
1913
1914
1915 /***********************************************************************
1916  *              GetViewportExtEx (GDI32.@)
1917  */
1918 BOOL WINAPI GetViewportExtEx( HDC hdc, LPSIZE size )
1919 {
1920     DC * dc = get_dc_ptr( hdc );
1921     if (!dc) return FALSE;
1922     size->cx = dc->vportExtX;
1923     size->cy = dc->vportExtY;
1924     release_dc_ptr( dc );
1925     return TRUE;
1926 }
1927
1928
1929 /***********************************************************************
1930  *              GetViewportOrgEx (GDI32.@)
1931  */
1932 BOOL WINAPI GetViewportOrgEx( HDC hdc, LPPOINT pt )
1933 {
1934     DC * dc = get_dc_ptr( hdc );
1935     if (!dc) return FALSE;
1936     pt->x = dc->vportOrgX;
1937     pt->y = dc->vportOrgY;
1938     release_dc_ptr( dc );
1939     return TRUE;
1940 }
1941
1942
1943 /***********************************************************************
1944  *              GetWindowExtEx (GDI32.@)
1945  */
1946 BOOL WINAPI GetWindowExtEx( HDC hdc, LPSIZE size )
1947 {
1948     DC * dc = get_dc_ptr( hdc );
1949     if (!dc) return FALSE;
1950     size->cx = dc->wndExtX;
1951     size->cy = dc->wndExtY;
1952     release_dc_ptr( dc );
1953     return TRUE;
1954 }
1955
1956
1957 /***********************************************************************
1958  *              GetWindowOrgEx (GDI32.@)
1959  */
1960 BOOL WINAPI GetWindowOrgEx( HDC hdc, LPPOINT pt )
1961 {
1962     DC * dc = get_dc_ptr( hdc );
1963     if (!dc) return FALSE;
1964     pt->x = dc->wndOrgX;
1965     pt->y = dc->wndOrgY;
1966     release_dc_ptr( dc );
1967     return TRUE;
1968 }
1969
1970
1971 /***********************************************************************
1972  *              InquireVisRgn   (GDI.131)
1973  */
1974 HRGN16 WINAPI InquireVisRgn16( HDC16 hdc )
1975 {
1976     HRGN16 ret = 0;
1977     DC * dc = get_dc_ptr( HDC_32(hdc) );
1978     if (dc)
1979     {
1980         ret = HRGN_16(dc->hVisRgn);
1981         release_dc_ptr( dc );
1982     }
1983     return ret;
1984 }
1985
1986
1987 /***********************************************************************
1988  *              GetClipRgn (GDI.173)
1989  */
1990 HRGN16 WINAPI GetClipRgn16( HDC16 hdc )
1991 {
1992     HRGN16 ret = 0;
1993     DC * dc = get_dc_ptr( HDC_32(hdc) );
1994     if (dc)
1995     {
1996         ret = HRGN_16(dc->hClipRgn);
1997         release_dc_ptr( dc );
1998     }
1999     return ret;
2000 }
2001
2002
2003 /***********************************************************************
2004  *           GetLayout    (GDI32.@)
2005  *
2006  * Gets left->right or right->left text layout flags of a dc.
2007  *
2008  */
2009 DWORD WINAPI GetLayout(HDC hdc)
2010 {
2011     DWORD layout = GDI_ERROR;
2012
2013     DC * dc = get_dc_ptr( hdc );
2014     if (dc)
2015     {
2016         layout = dc->layout;
2017         release_dc_ptr( dc );
2018     }
2019
2020     TRACE("hdc : %p, layout : %08x\n", hdc, layout);
2021
2022     return layout;
2023 }
2024
2025 /***********************************************************************
2026  *           SetLayout    (GDI32.@)
2027  *
2028  * Sets left->right or right->left text layout flags of a dc.
2029  *
2030  */
2031 DWORD WINAPI SetLayout(HDC hdc, DWORD layout)
2032 {
2033     DWORD oldlayout = GDI_ERROR;
2034
2035     DC * dc = get_dc_ptr( hdc );
2036     if (dc)
2037     {
2038         oldlayout = dc->layout;
2039         dc->layout = layout;
2040         release_dc_ptr( dc );
2041     }
2042
2043     TRACE("hdc : %p, old layout : %08x, new layout : %08x\n", hdc, oldlayout, layout);
2044
2045     return oldlayout;
2046 }
2047
2048 /***********************************************************************
2049  *           GetDCBrushColor    (GDI32.@)
2050  *
2051  * Retrieves the current brush color for the specified device
2052  * context (DC).
2053  *
2054  */
2055 COLORREF WINAPI GetDCBrushColor(HDC hdc)
2056 {
2057     DC *dc;
2058     COLORREF dcBrushColor = CLR_INVALID;
2059
2060     TRACE("hdc(%p)\n", hdc);
2061
2062     dc = get_dc_ptr( hdc );
2063     if (dc)
2064     {
2065         dcBrushColor = dc->dcBrushColor;
2066         release_dc_ptr( dc );
2067     }
2068
2069     return dcBrushColor;
2070 }
2071
2072 /***********************************************************************
2073  *           SetDCBrushColor    (GDI32.@)
2074  *
2075  * Sets the current device context (DC) brush color to the specified
2076  * color value. If the device cannot represent the specified color
2077  * value, the color is set to the nearest physical color.
2078  *
2079  */
2080 COLORREF WINAPI SetDCBrushColor(HDC hdc, COLORREF crColor)
2081 {
2082     DC *dc;
2083     COLORREF oldClr = CLR_INVALID;
2084
2085     TRACE("hdc(%p) crColor(%08x)\n", hdc, crColor);
2086
2087     dc = get_dc_ptr( hdc );
2088     if (dc)
2089     {
2090         if (dc->funcs->pSetDCBrushColor)
2091             crColor = dc->funcs->pSetDCBrushColor( dc->physDev, crColor );
2092         else if (dc->hBrush == GetStockObject( DC_BRUSH ))
2093         {
2094             /* If DC_BRUSH is selected, update driver pen color */
2095             HBRUSH hBrush = CreateSolidBrush( crColor );
2096             dc->funcs->pSelectBrush( dc->physDev, hBrush );
2097             DeleteObject( hBrush );
2098         }
2099
2100         if (crColor != CLR_INVALID)
2101         {
2102             oldClr = dc->dcBrushColor;
2103             dc->dcBrushColor = crColor;
2104         }
2105
2106         release_dc_ptr( dc );
2107     }
2108
2109     return oldClr;
2110 }
2111
2112 /***********************************************************************
2113  *           GetDCPenColor    (GDI32.@)
2114  *
2115  * Retrieves the current pen color for the specified device
2116  * context (DC).
2117  *
2118  */
2119 COLORREF WINAPI GetDCPenColor(HDC hdc)
2120 {
2121     DC *dc;
2122     COLORREF dcPenColor = CLR_INVALID;
2123
2124     TRACE("hdc(%p)\n", hdc);
2125
2126     dc = get_dc_ptr( hdc );
2127     if (dc)
2128     {
2129         dcPenColor = dc->dcPenColor;
2130         release_dc_ptr( dc );
2131     }
2132
2133     return dcPenColor;
2134 }
2135
2136 /***********************************************************************
2137  *           SetDCPenColor    (GDI32.@)
2138  *
2139  * Sets the current device context (DC) pen color to the specified
2140  * color value. If the device cannot represent the specified color
2141  * value, the color is set to the nearest physical color.
2142  *
2143  */
2144 COLORREF WINAPI SetDCPenColor(HDC hdc, COLORREF crColor)
2145 {
2146     DC *dc;
2147     COLORREF oldClr = CLR_INVALID;
2148
2149     TRACE("hdc(%p) crColor(%08x)\n", hdc, crColor);
2150
2151     dc = get_dc_ptr( hdc );
2152     if (dc)
2153     {
2154         if (dc->funcs->pSetDCPenColor)
2155             crColor = dc->funcs->pSetDCPenColor( dc->physDev, crColor );
2156         else if (dc->hPen == GetStockObject( DC_PEN ))
2157         {
2158             /* If DC_PEN is selected, update the driver pen color */
2159             LOGPEN logpen = { PS_SOLID, { 0, 0 }, crColor };
2160             HPEN hPen = CreatePenIndirect( &logpen );
2161             dc->funcs->pSelectPen( dc->physDev, hPen );
2162             DeleteObject( hPen );
2163         }
2164
2165         if (crColor != CLR_INVALID)
2166         {
2167             oldClr = dc->dcPenColor;
2168             dc->dcPenColor = crColor;
2169         }
2170
2171         release_dc_ptr( dc );
2172     }
2173
2174     return oldClr;
2175 }
2176
2177 /***********************************************************************
2178  *           CancelDC    (GDI32.@)
2179  */
2180 BOOL WINAPI CancelDC(HDC hdc)
2181 {
2182     FIXME("stub\n");
2183     return TRUE;
2184 }
2185
2186 /***********************************************************************
2187  *           SetVirtualResolution   (GDI32.@)
2188  *
2189  * Undocumented on msdn.  Called when PowerPoint XP saves a file.
2190  */
2191 DWORD WINAPI SetVirtualResolution(HDC hdc, DWORD dw2, DWORD dw3, DWORD dw4, DWORD dw5)
2192 {
2193     FIXME("(%p %08x %08x %08x %08x): stub!\n", hdc, dw2, dw3, dw4, dw5);
2194     return FALSE;
2195 }
2196
2197 /*******************************************************************
2198  *      GetMiterLimit [GDI32.@]
2199  *
2200  *
2201  */
2202 BOOL WINAPI GetMiterLimit(HDC hdc, PFLOAT peLimit)
2203 {
2204     BOOL bRet = FALSE;
2205     DC *dc;
2206
2207     TRACE("(%p,%p)\n", hdc, peLimit);
2208
2209     dc = get_dc_ptr( hdc );
2210     if (dc)
2211     {
2212         if (peLimit)
2213             *peLimit = dc->miterLimit;
2214
2215         release_dc_ptr( dc );
2216         bRet = TRUE;
2217     }
2218     return bRet;
2219 }
2220
2221 /*******************************************************************
2222  *      SetMiterLimit [GDI32.@]
2223  *
2224  *
2225  */
2226 BOOL WINAPI SetMiterLimit(HDC hdc, FLOAT eNewLimit, PFLOAT peOldLimit)
2227 {
2228     BOOL bRet = FALSE;
2229     DC *dc;
2230
2231     TRACE("(%p,%f,%p)\n", hdc, eNewLimit, peOldLimit);
2232
2233     dc = get_dc_ptr( hdc );
2234     if (dc)
2235     {
2236         if (peOldLimit)
2237             *peOldLimit = dc->miterLimit;
2238         dc->miterLimit = eNewLimit;
2239         release_dc_ptr( dc );
2240         bRet = TRUE;
2241     }
2242     return bRet;
2243 }
2244
2245 /*******************************************************************
2246  *      GdiIsMetaPrintDC [GDI32.@]
2247  */
2248 BOOL WINAPI GdiIsMetaPrintDC(HDC hdc)
2249 {
2250     FIXME("%p\n", hdc);
2251     return FALSE;
2252 }
2253
2254 /*******************************************************************
2255  *      GdiIsMetaFileDC [GDI32.@]
2256  */
2257 BOOL WINAPI GdiIsMetaFileDC(HDC hdc)
2258 {
2259     TRACE("%p\n", hdc);
2260
2261     switch( GetObjectType( hdc ) )
2262     {
2263     case OBJ_METADC:
2264     case OBJ_ENHMETADC:
2265         return TRUE;
2266     }
2267     return FALSE;
2268 }
2269
2270 /*******************************************************************
2271  *      GdiIsPlayMetafileDC [GDI32.@]
2272  */
2273 BOOL WINAPI GdiIsPlayMetafileDC(HDC hdc)
2274 {
2275     FIXME("%p\n", hdc);
2276     return FALSE;
2277 }