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          !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     if (dc->funcs->pSetWorldTransform)
1243     {
1244         ret = dc->funcs->pSetWorldTransform(dc->physDev, xform);
1245         if (!ret) goto done;
1246     }
1247
1248     dc->xformWorld2Wnd = *xform;
1249     DC_UpdateXforms( dc );
1250     ret = TRUE;
1251  done:
1252     release_dc_ptr( dc );
1253     return ret;
1254 }
1255
1256
1257 /****************************************************************************
1258  * ModifyWorldTransform [GDI32.@]
1259  * Modifies the world transformation for a device context.
1260  *
1261  * PARAMS
1262  *    hdc   [I] Handle to device context
1263  *    xform [I] XFORM structure that will be used to modify the world
1264  *              transformation
1265  *    iMode [I] Specifies in what way to modify the world transformation
1266  *              Possible values:
1267  *              MWT_IDENTITY
1268  *                 Resets the world transformation to the identity matrix.
1269  *                 The parameter xform is ignored.
1270  *              MWT_LEFTMULTIPLY
1271  *                 Multiplies xform into the world transformation matrix from
1272  *                 the left.
1273  *              MWT_RIGHTMULTIPLY
1274  *                 Multiplies xform into the world transformation matrix from
1275  *                 the right.
1276  *
1277  * RETURNS
1278  *  Success: TRUE.
1279  *  Failure: FALSE. Use GetLastError() to determine the cause.
1280  */
1281 BOOL WINAPI ModifyWorldTransform( HDC hdc, const XFORM *xform,
1282     DWORD iMode )
1283 {
1284     BOOL ret = FALSE;
1285     DC *dc = get_dc_ptr( hdc );
1286
1287     /* Check for illegal parameters */
1288     if (!dc) return FALSE;
1289     if (!xform && iMode != MWT_IDENTITY) goto done;
1290
1291     /* Check that graphics mode is GM_ADVANCED */
1292     if (dc->GraphicsMode!=GM_ADVANCED) goto done;
1293
1294     if (dc->funcs->pModifyWorldTransform)
1295     {
1296         ret = dc->funcs->pModifyWorldTransform(dc->physDev, xform, iMode);
1297         if (!ret) goto done;
1298     }
1299
1300     switch (iMode)
1301     {
1302         case MWT_IDENTITY:
1303             dc->xformWorld2Wnd.eM11 = 1.0f;
1304             dc->xformWorld2Wnd.eM12 = 0.0f;
1305             dc->xformWorld2Wnd.eM21 = 0.0f;
1306             dc->xformWorld2Wnd.eM22 = 1.0f;
1307             dc->xformWorld2Wnd.eDx  = 0.0f;
1308             dc->xformWorld2Wnd.eDy  = 0.0f;
1309             break;
1310         case MWT_LEFTMULTIPLY:
1311             CombineTransform( &dc->xformWorld2Wnd, xform,
1312                 &dc->xformWorld2Wnd );
1313             break;
1314         case MWT_RIGHTMULTIPLY:
1315             CombineTransform( &dc->xformWorld2Wnd, &dc->xformWorld2Wnd,
1316                 xform );
1317             break;
1318         default:
1319             goto done;
1320     }
1321
1322     DC_UpdateXforms( dc );
1323     ret = TRUE;
1324  done:
1325     release_dc_ptr( dc );
1326     return ret;
1327 }
1328
1329
1330 /****************************************************************************
1331  * CombineTransform [GDI32.@]
1332  * Combines two transformation matrices.
1333  *
1334  * PARAMS
1335  *    xformResult [O] Stores the result of combining the two matrices
1336  *    xform1      [I] Specifies the first matrix to apply
1337  *    xform2      [I] Specifies the second matrix to apply
1338  *
1339  * REMARKS
1340  *    The same matrix can be passed in for more than one of the parameters.
1341  *
1342  * RETURNS
1343  *  Success: TRUE.
1344  *  Failure: FALSE. Use GetLastError() to determine the cause.
1345  */
1346 BOOL WINAPI CombineTransform( LPXFORM xformResult, const XFORM *xform1,
1347     const XFORM *xform2 )
1348 {
1349     XFORM xformTemp;
1350
1351     /* Check for illegal parameters */
1352     if (!xformResult || !xform1 || !xform2)
1353         return FALSE;
1354
1355     /* Create the result in a temporary XFORM, since xformResult may be
1356      * equal to xform1 or xform2 */
1357     xformTemp.eM11 = xform1->eM11 * xform2->eM11 +
1358                      xform1->eM12 * xform2->eM21;
1359     xformTemp.eM12 = xform1->eM11 * xform2->eM12 +
1360                      xform1->eM12 * xform2->eM22;
1361     xformTemp.eM21 = xform1->eM21 * xform2->eM11 +
1362                      xform1->eM22 * xform2->eM21;
1363     xformTemp.eM22 = xform1->eM21 * xform2->eM12 +
1364                      xform1->eM22 * xform2->eM22;
1365     xformTemp.eDx  = xform1->eDx  * xform2->eM11 +
1366                      xform1->eDy  * xform2->eM21 +
1367                      xform2->eDx;
1368     xformTemp.eDy  = xform1->eDx  * xform2->eM12 +
1369                      xform1->eDy  * xform2->eM22 +
1370                      xform2->eDy;
1371
1372     /* Copy the result to xformResult */
1373     *xformResult = xformTemp;
1374
1375     return TRUE;
1376 }
1377
1378
1379 /***********************************************************************
1380  *           SetDCHook   (GDI32.@)
1381  *
1382  * Note: this doesn't exist in Win32, we add it here because user32 needs it.
1383  */
1384 BOOL WINAPI SetDCHook( HDC hdc, DCHOOKPROC hookProc, DWORD_PTR dwHookData )
1385 {
1386     DC *dc = get_dc_ptr( hdc );
1387
1388     if (!dc) return FALSE;
1389
1390     if (!(dc->flags & DC_SAVED))
1391     {
1392         dc->dwHookData = dwHookData;
1393         dc->hookThunk = hookProc;
1394     }
1395     release_dc_ptr( dc );
1396     return TRUE;
1397 }
1398
1399
1400 /***********************************************************************
1401  *           GetDCHook   (GDI32.@)
1402  *
1403  * Note: this doesn't exist in Win32, we add it here because user32 needs it.
1404  */
1405 DWORD_PTR WINAPI GetDCHook( HDC hdc, DCHOOKPROC *proc )
1406 {
1407     DC *dc = get_dc_ptr( hdc );
1408     DWORD_PTR ret;
1409
1410     if (!dc) return 0;
1411     if (proc) *proc = dc->hookThunk;
1412     ret = dc->dwHookData;
1413     release_dc_ptr( dc );
1414     return ret;
1415 }
1416
1417
1418 /* relay function to call the 16-bit DC hook proc */
1419 static BOOL WINAPI call_dc_hook16( HDC hdc, WORD code, DWORD_PTR data, LPARAM lParam )
1420 {
1421     WORD args[6];
1422     DWORD ret = 0;
1423     DC *dc = get_dc_ptr( hdc );
1424
1425     if (!dc) return FALSE;
1426     if (dc->hookProc)
1427     {
1428         args[5] = HDC_16(hdc);
1429         args[4] = code;
1430         args[3] = HIWORD(data);
1431         args[2] = LOWORD(data);
1432         args[1] = HIWORD(lParam);
1433         args[0] = LOWORD(lParam);
1434         WOWCallback16Ex( (DWORD)dc->hookProc, WCB16_PASCAL, sizeof(args), args, &ret );
1435     }
1436     release_dc_ptr( dc );
1437     return LOWORD(ret);
1438 }
1439
1440 /***********************************************************************
1441  *           SetDCHook   (GDI.190)
1442  */
1443 BOOL16 WINAPI SetDCHook16( HDC16 hdc16, FARPROC16 hookProc, DWORD dwHookData )
1444 {
1445     DC *dc = get_dc_ptr( HDC_32(hdc16) );
1446
1447     if (!dc) return FALSE;
1448     if (!(dc->flags & DC_SAVED))
1449     {
1450         dc->dwHookData = dwHookData;
1451         dc->hookThunk = call_dc_hook16;
1452         dc->hookProc = hookProc;
1453     }
1454     release_dc_ptr( dc );
1455     return TRUE;
1456 }
1457
1458
1459 /***********************************************************************
1460  *           GetDCHook   (GDI.191)
1461  */
1462 DWORD WINAPI GetDCHook16( HDC16 hdc16, FARPROC16 *phookProc )
1463 {
1464     HDC hdc = HDC_32( hdc16 );
1465     DC *dc = get_dc_ptr( hdc );
1466     DWORD ret;
1467
1468     if (!dc) return 0;
1469     *phookProc = dc->hookProc;
1470     ret = dc->dwHookData;
1471     release_dc_ptr( dc );
1472     return ret;
1473 }
1474
1475
1476 /***********************************************************************
1477  *           SetHookFlags   (GDI32.@)
1478  *
1479  * Note: this doesn't exist in Win32, we add it here because user32 needs it.
1480  */
1481 WORD WINAPI SetHookFlags( HDC hdc, WORD flags )
1482 {
1483     DC *dc = get_dc_obj( hdc );  /* not get_dc_ptr, this needs to work from any thread */
1484     LONG ret = 0;
1485
1486     if (!dc) return 0;
1487
1488     /* "Undocumented Windows" info is slightly confusing. */
1489
1490     TRACE("hDC %p, flags %04x\n",hdc,flags);
1491
1492     if (flags & DCHF_INVALIDATEVISRGN)
1493         ret = InterlockedExchange( &dc->dirty, 1 );
1494     else if (flags & DCHF_VALIDATEVISRGN || !flags)
1495         ret = InterlockedExchange( &dc->dirty, 0 );
1496
1497     GDI_ReleaseObj( dc );
1498     return ret;
1499 }
1500
1501 /***********************************************************************
1502  *           SetICMMode    (GDI32.@)
1503  */
1504 INT WINAPI SetICMMode(HDC hdc, INT iEnableICM)
1505 {
1506 /*FIXME:  Assume that ICM is always off, and cannot be turned on */
1507     if (iEnableICM == ICM_OFF) return ICM_OFF;
1508     if (iEnableICM == ICM_ON) return 0;
1509     if (iEnableICM == ICM_QUERY) return ICM_OFF;
1510     return 0;
1511 }
1512
1513 /***********************************************************************
1514  *           GetDeviceGammaRamp    (GDI32.@)
1515  */
1516 BOOL WINAPI GetDeviceGammaRamp(HDC hDC, LPVOID ptr)
1517 {
1518     BOOL ret = FALSE;
1519     DC *dc = get_dc_ptr( hDC );
1520
1521     if( dc )
1522     {
1523         if (dc->funcs->pGetDeviceGammaRamp)
1524             ret = dc->funcs->pGetDeviceGammaRamp(dc->physDev, ptr);
1525         release_dc_ptr( dc );
1526     }
1527     return ret;
1528 }
1529
1530 /***********************************************************************
1531  *           SetDeviceGammaRamp    (GDI32.@)
1532  */
1533 BOOL WINAPI SetDeviceGammaRamp(HDC hDC, LPVOID ptr)
1534 {
1535     BOOL ret = FALSE;
1536     DC *dc = get_dc_ptr( hDC );
1537
1538     if( dc )
1539     {
1540         if (dc->funcs->pSetDeviceGammaRamp)
1541             ret = dc->funcs->pSetDeviceGammaRamp(dc->physDev, ptr);
1542         release_dc_ptr( dc );
1543     }
1544     return ret;
1545 }
1546
1547 /***********************************************************************
1548  *           GetColorSpace    (GDI32.@)
1549  */
1550 HCOLORSPACE WINAPI GetColorSpace(HDC hdc)
1551 {
1552 /*FIXME    Need to to whatever GetColorSpace actually does */
1553     return 0;
1554 }
1555
1556 /***********************************************************************
1557  *           CreateColorSpaceA    (GDI32.@)
1558  */
1559 HCOLORSPACE WINAPI CreateColorSpaceA( LPLOGCOLORSPACEA lpLogColorSpace )
1560 {
1561   FIXME( "stub\n" );
1562   return 0;
1563 }
1564
1565 /***********************************************************************
1566  *           CreateColorSpaceW    (GDI32.@)
1567  */
1568 HCOLORSPACE WINAPI CreateColorSpaceW( LPLOGCOLORSPACEW lpLogColorSpace )
1569 {
1570   FIXME( "stub\n" );
1571   return 0;
1572 }
1573
1574 /***********************************************************************
1575  *           DeleteColorSpace     (GDI32.@)
1576  */
1577 BOOL WINAPI DeleteColorSpace( HCOLORSPACE hColorSpace )
1578 {
1579   FIXME( "stub\n" );
1580
1581   return TRUE;
1582 }
1583
1584 /***********************************************************************
1585  *           SetColorSpace     (GDI32.@)
1586  */
1587 HCOLORSPACE WINAPI SetColorSpace( HDC hDC, HCOLORSPACE hColorSpace )
1588 {
1589   FIXME( "stub\n" );
1590
1591   return hColorSpace;
1592 }
1593
1594 /***********************************************************************
1595  *           GetBoundsRect    (GDI32.@)
1596  */
1597 UINT WINAPI GetBoundsRect(HDC hdc, LPRECT rect, UINT flags)
1598 {
1599     UINT ret;
1600     DC *dc = get_dc_ptr( hdc );
1601
1602     if ( !dc ) return 0;
1603
1604     if (rect) *rect = dc->BoundsRect;
1605
1606     ret = ((dc->flags & DC_BOUNDS_SET) ? DCB_SET : DCB_RESET);
1607
1608     if (flags & DCB_RESET)
1609     {
1610         dc->BoundsRect.left   = 0;
1611         dc->BoundsRect.top    = 0;
1612         dc->BoundsRect.right  = 0;
1613         dc->BoundsRect.bottom = 0;
1614         dc->flags &= ~DC_BOUNDS_SET;
1615     }
1616     release_dc_ptr( dc );
1617     return ret;
1618 }
1619
1620
1621 /***********************************************************************
1622  *           SetBoundsRect    (GDI32.@)
1623  */
1624 UINT WINAPI SetBoundsRect(HDC hdc, const RECT* rect, UINT flags)
1625 {
1626     UINT ret;
1627     DC *dc;
1628
1629     if ((flags & DCB_ENABLE) && (flags & DCB_DISABLE)) return 0;
1630     if (!(dc = get_dc_ptr( hdc ))) return 0;
1631
1632     ret = ((dc->flags & DC_BOUNDS_ENABLE) ? DCB_ENABLE : DCB_DISABLE) |
1633           ((dc->flags & DC_BOUNDS_SET) ? DCB_SET : DCB_RESET);
1634
1635     if (flags & DCB_RESET)
1636     {
1637         dc->BoundsRect.left   = 0;
1638         dc->BoundsRect.top    = 0;
1639         dc->BoundsRect.right  = 0;
1640         dc->BoundsRect.bottom = 0;
1641         dc->flags &= ~DC_BOUNDS_SET;
1642     }
1643
1644     if ((flags & DCB_ACCUMULATE) && rect && rect->left < rect->right && rect->top < rect->bottom)
1645     {
1646         if (dc->flags & DC_BOUNDS_SET)
1647         {
1648             dc->BoundsRect.left   = min( dc->BoundsRect.left, rect->left );
1649             dc->BoundsRect.top    = min( dc->BoundsRect.top, rect->top );
1650             dc->BoundsRect.right  = max( dc->BoundsRect.right, rect->right );
1651             dc->BoundsRect.bottom = max( dc->BoundsRect.bottom, rect->bottom );
1652         }
1653         else
1654         {
1655             dc->BoundsRect = *rect;
1656             dc->flags |= DC_BOUNDS_SET;
1657         }
1658     }
1659
1660     if (flags & DCB_ENABLE) dc->flags |= DC_BOUNDS_ENABLE;
1661     if (flags & DCB_DISABLE) dc->flags &= ~DC_BOUNDS_ENABLE;
1662
1663     release_dc_ptr( dc );
1664     return ret;
1665 }
1666
1667
1668 /***********************************************************************
1669  *              GetRelAbs               (GDI32.@)
1670  */
1671 INT WINAPI GetRelAbs( HDC hdc, DWORD dwIgnore )
1672 {
1673     INT ret = 0;
1674     DC *dc = get_dc_ptr( hdc );
1675     if (dc)
1676     {
1677         ret = dc->relAbsMode;
1678         release_dc_ptr( dc );
1679     }
1680     return ret;
1681 }
1682
1683
1684
1685
1686 /***********************************************************************
1687  *              GetBkMode (GDI32.@)
1688  */
1689 INT WINAPI GetBkMode( HDC hdc )
1690 {
1691     INT ret = 0;
1692     DC * dc = get_dc_ptr( hdc );
1693     if (dc)
1694     {
1695         ret = dc->backgroundMode;
1696         release_dc_ptr( dc );
1697     }
1698     return ret;
1699 }
1700
1701
1702 /***********************************************************************
1703  *              SetBkMode (GDI32.@)
1704  */
1705 INT WINAPI SetBkMode( HDC hdc, INT mode )
1706 {
1707     INT ret;
1708     DC *dc;
1709     if ((mode <= 0) || (mode > BKMODE_LAST))
1710     {
1711         SetLastError(ERROR_INVALID_PARAMETER);
1712         return 0;
1713     }
1714     if (!(dc = get_dc_ptr( hdc ))) return 0;
1715
1716     ret = dc->backgroundMode;
1717     if (dc->funcs->pSetBkMode)
1718         if (!dc->funcs->pSetBkMode( dc->physDev, mode ))
1719             ret = 0;
1720     if (ret)
1721         dc->backgroundMode = mode;
1722     release_dc_ptr( dc );
1723     return ret;
1724 }
1725
1726
1727 /***********************************************************************
1728  *              GetROP2 (GDI32.@)
1729  */
1730 INT WINAPI GetROP2( HDC hdc )
1731 {
1732     INT ret = 0;
1733     DC * dc = get_dc_ptr( hdc );
1734     if (dc)
1735     {
1736         ret = dc->ROPmode;
1737         release_dc_ptr( dc );
1738     }
1739     return ret;
1740 }
1741
1742
1743 /***********************************************************************
1744  *              SetROP2 (GDI32.@)
1745  */
1746 INT WINAPI SetROP2( HDC hdc, INT mode )
1747 {
1748     INT ret;
1749     DC *dc;
1750     if ((mode < R2_BLACK) || (mode > R2_WHITE))
1751     {
1752         SetLastError(ERROR_INVALID_PARAMETER);
1753         return 0;
1754     }
1755     if (!(dc = get_dc_ptr( hdc ))) return 0;
1756     ret = dc->ROPmode;
1757     if (dc->funcs->pSetROP2)
1758         if (!dc->funcs->pSetROP2( dc->physDev, mode ))
1759             ret = 0;
1760     if (ret)
1761         dc->ROPmode = mode;
1762     release_dc_ptr( dc );
1763     return ret;
1764 }
1765
1766
1767 /***********************************************************************
1768  *              SetRelAbs (GDI32.@)
1769  */
1770 INT WINAPI SetRelAbs( HDC hdc, INT mode )
1771 {
1772     INT ret;
1773     DC *dc;
1774     if ((mode != ABSOLUTE) && (mode != RELATIVE))
1775     {
1776         SetLastError(ERROR_INVALID_PARAMETER);
1777         return 0;
1778     }
1779     if (!(dc = get_dc_ptr( hdc ))) return 0;
1780     if (dc->funcs->pSetRelAbs)
1781         ret = dc->funcs->pSetRelAbs( dc->physDev, mode );
1782     else
1783     {
1784         ret = dc->relAbsMode;
1785         dc->relAbsMode = mode;
1786     }
1787     release_dc_ptr( dc );
1788     return ret;
1789 }
1790
1791
1792 /***********************************************************************
1793  *              GetPolyFillMode (GDI32.@)
1794  */
1795 INT WINAPI GetPolyFillMode( HDC hdc )
1796 {
1797     INT ret = 0;
1798     DC * dc = get_dc_ptr( hdc );
1799     if (dc)
1800     {
1801         ret = dc->polyFillMode;
1802         release_dc_ptr( dc );
1803     }
1804     return ret;
1805 }
1806
1807
1808 /***********************************************************************
1809  *              SetPolyFillMode (GDI32.@)
1810  */
1811 INT WINAPI SetPolyFillMode( HDC hdc, INT mode )
1812 {
1813     INT ret;
1814     DC *dc;
1815     if ((mode <= 0) || (mode > POLYFILL_LAST))
1816     {
1817         SetLastError(ERROR_INVALID_PARAMETER);
1818         return 0;
1819     }
1820     if (!(dc = get_dc_ptr( hdc ))) return 0;
1821     ret = dc->polyFillMode;
1822     if (dc->funcs->pSetPolyFillMode)
1823         if (!dc->funcs->pSetPolyFillMode( dc->physDev, mode ))
1824             ret = 0;
1825     if (ret)
1826         dc->polyFillMode = mode;
1827     release_dc_ptr( dc );
1828     return ret;
1829 }
1830
1831
1832 /***********************************************************************
1833  *              GetStretchBltMode (GDI32.@)
1834  */
1835 INT WINAPI GetStretchBltMode( HDC hdc )
1836 {
1837     INT ret = 0;
1838     DC * dc = get_dc_ptr( hdc );
1839     if (dc)
1840     {
1841         ret = dc->stretchBltMode;
1842         release_dc_ptr( dc );
1843     }
1844     return ret;
1845 }
1846
1847
1848 /***********************************************************************
1849  *              SetStretchBltMode (GDI32.@)
1850  */
1851 INT WINAPI SetStretchBltMode( HDC hdc, INT mode )
1852 {
1853     INT ret;
1854     DC *dc;
1855     if ((mode <= 0) || (mode > MAXSTRETCHBLTMODE))
1856     {
1857         SetLastError(ERROR_INVALID_PARAMETER);
1858         return 0;
1859     }
1860     if (!(dc = get_dc_ptr( hdc ))) return 0;
1861     ret = dc->stretchBltMode;
1862     if (dc->funcs->pSetStretchBltMode)
1863         if (!dc->funcs->pSetStretchBltMode( dc->physDev, mode ))
1864             ret = 0;
1865     if (ret)
1866         dc->stretchBltMode = mode;
1867     release_dc_ptr( dc );
1868     return ret;
1869 }
1870
1871
1872 /***********************************************************************
1873  *              GetMapMode (GDI32.@)
1874  */
1875 INT WINAPI GetMapMode( HDC hdc )
1876 {
1877     INT ret = 0;
1878     DC * dc = get_dc_ptr( hdc );
1879     if (dc)
1880     {
1881         ret = dc->MapMode;
1882         release_dc_ptr( dc );
1883     }
1884     return ret;
1885 }
1886
1887
1888 /***********************************************************************
1889  *              GetBrushOrgEx (GDI32.@)
1890  */
1891 BOOL WINAPI GetBrushOrgEx( HDC hdc, LPPOINT pt )
1892 {
1893     DC * dc = get_dc_ptr( hdc );
1894     if (!dc) return FALSE;
1895     pt->x = dc->brushOrgX;
1896     pt->y = dc->brushOrgY;
1897     release_dc_ptr( dc );
1898     return TRUE;
1899 }
1900
1901
1902 /***********************************************************************
1903  *              GetCurrentPositionEx (GDI32.@)
1904  */
1905 BOOL WINAPI GetCurrentPositionEx( HDC hdc, LPPOINT pt )
1906 {
1907     DC * dc = get_dc_ptr( hdc );
1908     if (!dc) return FALSE;
1909     pt->x = dc->CursPosX;
1910     pt->y = dc->CursPosY;
1911     release_dc_ptr( dc );
1912     return TRUE;
1913 }
1914
1915
1916 /***********************************************************************
1917  *              GetViewportExtEx (GDI32.@)
1918  */
1919 BOOL WINAPI GetViewportExtEx( HDC hdc, LPSIZE size )
1920 {
1921     DC * dc = get_dc_ptr( hdc );
1922     if (!dc) return FALSE;
1923     size->cx = dc->vportExtX;
1924     size->cy = dc->vportExtY;
1925     release_dc_ptr( dc );
1926     return TRUE;
1927 }
1928
1929
1930 /***********************************************************************
1931  *              GetViewportOrgEx (GDI32.@)
1932  */
1933 BOOL WINAPI GetViewportOrgEx( HDC hdc, LPPOINT pt )
1934 {
1935     DC * dc = get_dc_ptr( hdc );
1936     if (!dc) return FALSE;
1937     pt->x = dc->vportOrgX;
1938     pt->y = dc->vportOrgY;
1939     release_dc_ptr( dc );
1940     return TRUE;
1941 }
1942
1943
1944 /***********************************************************************
1945  *              GetWindowExtEx (GDI32.@)
1946  */
1947 BOOL WINAPI GetWindowExtEx( HDC hdc, LPSIZE size )
1948 {
1949     DC * dc = get_dc_ptr( hdc );
1950     if (!dc) return FALSE;
1951     size->cx = dc->wndExtX;
1952     size->cy = dc->wndExtY;
1953     release_dc_ptr( dc );
1954     return TRUE;
1955 }
1956
1957
1958 /***********************************************************************
1959  *              GetWindowOrgEx (GDI32.@)
1960  */
1961 BOOL WINAPI GetWindowOrgEx( HDC hdc, LPPOINT pt )
1962 {
1963     DC * dc = get_dc_ptr( hdc );
1964     if (!dc) return FALSE;
1965     pt->x = dc->wndOrgX;
1966     pt->y = dc->wndOrgY;
1967     release_dc_ptr( dc );
1968     return TRUE;
1969 }
1970
1971
1972 /***********************************************************************
1973  *              InquireVisRgn   (GDI.131)
1974  */
1975 HRGN16 WINAPI InquireVisRgn16( HDC16 hdc )
1976 {
1977     HRGN16 ret = 0;
1978     DC * dc = get_dc_ptr( HDC_32(hdc) );
1979     if (dc)
1980     {
1981         ret = HRGN_16(dc->hVisRgn);
1982         release_dc_ptr( dc );
1983     }
1984     return ret;
1985 }
1986
1987
1988 /***********************************************************************
1989  *              GetClipRgn (GDI.173)
1990  */
1991 HRGN16 WINAPI GetClipRgn16( HDC16 hdc )
1992 {
1993     HRGN16 ret = 0;
1994     DC * dc = get_dc_ptr( HDC_32(hdc) );
1995     if (dc)
1996     {
1997         ret = HRGN_16(dc->hClipRgn);
1998         release_dc_ptr( dc );
1999     }
2000     return ret;
2001 }
2002
2003
2004 /***********************************************************************
2005  *           GetLayout    (GDI32.@)
2006  *
2007  * Gets left->right or right->left text layout flags of a dc.
2008  *
2009  */
2010 DWORD WINAPI GetLayout(HDC hdc)
2011 {
2012     DWORD layout = GDI_ERROR;
2013
2014     DC * dc = get_dc_ptr( hdc );
2015     if (dc)
2016     {
2017         layout = dc->layout;
2018         release_dc_ptr( dc );
2019     }
2020
2021     TRACE("hdc : %p, layout : %08x\n", hdc, layout);
2022
2023     return layout;
2024 }
2025
2026 /***********************************************************************
2027  *           SetLayout    (GDI32.@)
2028  *
2029  * Sets left->right or right->left text layout flags of a dc.
2030  *
2031  */
2032 DWORD WINAPI SetLayout(HDC hdc, DWORD layout)
2033 {
2034     DWORD oldlayout = GDI_ERROR;
2035
2036     DC * dc = get_dc_ptr( hdc );
2037     if (dc)
2038     {
2039         oldlayout = dc->layout;
2040         dc->layout = layout;
2041         release_dc_ptr( dc );
2042     }
2043
2044     TRACE("hdc : %p, old layout : %08x, new layout : %08x\n", hdc, oldlayout, layout);
2045
2046     return oldlayout;
2047 }
2048
2049 /***********************************************************************
2050  *           GetDCBrushColor    (GDI32.@)
2051  *
2052  * Retrieves the current brush color for the specified device
2053  * context (DC).
2054  *
2055  */
2056 COLORREF WINAPI GetDCBrushColor(HDC hdc)
2057 {
2058     DC *dc;
2059     COLORREF dcBrushColor = CLR_INVALID;
2060
2061     TRACE("hdc(%p)\n", hdc);
2062
2063     dc = get_dc_ptr( hdc );
2064     if (dc)
2065     {
2066         dcBrushColor = dc->dcBrushColor;
2067         release_dc_ptr( dc );
2068     }
2069
2070     return dcBrushColor;
2071 }
2072
2073 /***********************************************************************
2074  *           SetDCBrushColor    (GDI32.@)
2075  *
2076  * Sets the current device context (DC) brush color to the specified
2077  * color value. If the device cannot represent the specified color
2078  * value, the color is set to the nearest physical color.
2079  *
2080  */
2081 COLORREF WINAPI SetDCBrushColor(HDC hdc, COLORREF crColor)
2082 {
2083     DC *dc;
2084     COLORREF oldClr = CLR_INVALID;
2085
2086     TRACE("hdc(%p) crColor(%08x)\n", hdc, crColor);
2087
2088     dc = get_dc_ptr( hdc );
2089     if (dc)
2090     {
2091         if (dc->funcs->pSetDCBrushColor)
2092             crColor = dc->funcs->pSetDCBrushColor( dc->physDev, crColor );
2093         else if (dc->hBrush == GetStockObject( DC_BRUSH ))
2094         {
2095             /* If DC_BRUSH is selected, update driver pen color */
2096             HBRUSH hBrush = CreateSolidBrush( crColor );
2097             dc->funcs->pSelectBrush( dc->physDev, hBrush );
2098             DeleteObject( hBrush );
2099         }
2100
2101         if (crColor != CLR_INVALID)
2102         {
2103             oldClr = dc->dcBrushColor;
2104             dc->dcBrushColor = crColor;
2105         }
2106
2107         release_dc_ptr( dc );
2108     }
2109
2110     return oldClr;
2111 }
2112
2113 /***********************************************************************
2114  *           GetDCPenColor    (GDI32.@)
2115  *
2116  * Retrieves the current pen color for the specified device
2117  * context (DC).
2118  *
2119  */
2120 COLORREF WINAPI GetDCPenColor(HDC hdc)
2121 {
2122     DC *dc;
2123     COLORREF dcPenColor = CLR_INVALID;
2124
2125     TRACE("hdc(%p)\n", hdc);
2126
2127     dc = get_dc_ptr( hdc );
2128     if (dc)
2129     {
2130         dcPenColor = dc->dcPenColor;
2131         release_dc_ptr( dc );
2132     }
2133
2134     return dcPenColor;
2135 }
2136
2137 /***********************************************************************
2138  *           SetDCPenColor    (GDI32.@)
2139  *
2140  * Sets the current device context (DC) pen color to the specified
2141  * color value. If the device cannot represent the specified color
2142  * value, the color is set to the nearest physical color.
2143  *
2144  */
2145 COLORREF WINAPI SetDCPenColor(HDC hdc, COLORREF crColor)
2146 {
2147     DC *dc;
2148     COLORREF oldClr = CLR_INVALID;
2149
2150     TRACE("hdc(%p) crColor(%08x)\n", hdc, crColor);
2151
2152     dc = get_dc_ptr( hdc );
2153     if (dc)
2154     {
2155         if (dc->funcs->pSetDCPenColor)
2156             crColor = dc->funcs->pSetDCPenColor( dc->physDev, crColor );
2157         else if (dc->hPen == GetStockObject( DC_PEN ))
2158         {
2159             /* If DC_PEN is selected, update the driver pen color */
2160             LOGPEN logpen = { PS_SOLID, { 0, 0 }, crColor };
2161             HPEN hPen = CreatePenIndirect( &logpen );
2162             dc->funcs->pSelectPen( dc->physDev, hPen );
2163             DeleteObject( hPen );
2164         }
2165
2166         if (crColor != CLR_INVALID)
2167         {
2168             oldClr = dc->dcPenColor;
2169             dc->dcPenColor = crColor;
2170         }
2171
2172         release_dc_ptr( dc );
2173     }
2174
2175     return oldClr;
2176 }
2177
2178 /***********************************************************************
2179  *           CancelDC    (GDI32.@)
2180  */
2181 BOOL WINAPI CancelDC(HDC hdc)
2182 {
2183     FIXME("stub\n");
2184     return TRUE;
2185 }
2186
2187 /***********************************************************************
2188  *           SetVirtualResolution   (GDI32.@)
2189  *
2190  * Undocumented on msdn.  Called when PowerPoint XP saves a file.
2191  */
2192 DWORD WINAPI SetVirtualResolution(HDC hdc, DWORD dw2, DWORD dw3, DWORD dw4, DWORD dw5)
2193 {
2194     FIXME("(%p %08x %08x %08x %08x): stub!\n", hdc, dw2, dw3, dw4, dw5);
2195     return FALSE;
2196 }
2197
2198 /*******************************************************************
2199  *      GetMiterLimit [GDI32.@]
2200  *
2201  *
2202  */
2203 BOOL WINAPI GetMiterLimit(HDC hdc, PFLOAT peLimit)
2204 {
2205     BOOL bRet = FALSE;
2206     DC *dc;
2207
2208     TRACE("(%p,%p)\n", hdc, peLimit);
2209
2210     dc = get_dc_ptr( hdc );
2211     if (dc)
2212     {
2213         if (peLimit)
2214             *peLimit = dc->miterLimit;
2215
2216         release_dc_ptr( dc );
2217         bRet = TRUE;
2218     }
2219     return bRet;
2220 }
2221
2222 /*******************************************************************
2223  *      SetMiterLimit [GDI32.@]
2224  *
2225  *
2226  */
2227 BOOL WINAPI SetMiterLimit(HDC hdc, FLOAT eNewLimit, PFLOAT peOldLimit)
2228 {
2229     BOOL bRet = FALSE;
2230     DC *dc;
2231
2232     TRACE("(%p,%f,%p)\n", hdc, eNewLimit, peOldLimit);
2233
2234     dc = get_dc_ptr( hdc );
2235     if (dc)
2236     {
2237         if (peOldLimit)
2238             *peOldLimit = dc->miterLimit;
2239         dc->miterLimit = eNewLimit;
2240         release_dc_ptr( dc );
2241         bRet = TRUE;
2242     }
2243     return bRet;
2244 }
2245
2246 /*******************************************************************
2247  *      GdiIsMetaPrintDC [GDI32.@]
2248  */
2249 BOOL WINAPI GdiIsMetaPrintDC(HDC hdc)
2250 {
2251     FIXME("%p\n", hdc);
2252     return FALSE;
2253 }
2254
2255 /*******************************************************************
2256  *      GdiIsMetaFileDC [GDI32.@]
2257  */
2258 BOOL WINAPI GdiIsMetaFileDC(HDC hdc)
2259 {
2260     TRACE("%p\n", hdc);
2261
2262     switch( GetObjectType( hdc ) )
2263     {
2264     case OBJ_METADC:
2265     case OBJ_ENHMETADC:
2266         return TRUE;
2267     }
2268     return FALSE;
2269 }
2270
2271 /*******************************************************************
2272  *      GdiIsPlayMetafileDC [GDI32.@]
2273  */
2274 BOOL WINAPI GdiIsPlayMetafileDC(HDC hdc)
2275 {
2276     FIXME("%p\n", hdc);
2277     return FALSE;
2278 }