dlls/gdi32/dc.c

   1 /*
   2  * GDI Device Context functions
   3  *
   4  * Copyright 1993 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "config.h"
  22
  23 #include <assert.h>
  24 #include <stdarg.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include "windef.h"
  28 #include "winbase.h"
  29 #include "wingdi.h"
  30 #include "winreg.h"
  31 #include "winternl.h"
  32 #include "winerror.h"
  33 #include "wownt32.h"
  34 #include "gdi_private.h"
  35 #include "wine/unicode.h"
  36 #include "wine/debug.h"
  37
  38 WINE_DEFAULT_DEBUG_CHANNEL(dc);
  39
  40 static const WCHAR displayW[] = { 'd','i','s','p','l','a','y',0 };
  41
  42 static BOOL DC_DeleteObject( HGDIOBJ handle );
  43
  44 static const struct gdi_obj_funcs dc_funcs =
  45 {
  46     NULL,             /* pSelectObject */
  47     NULL,             /* pGetObjectA */
  48     NULL,             /* pGetObjectW */
  49     NULL,             /* pUnrealizeObject */
  50     DC_DeleteObject   /* pDeleteObject */
  51 };
  52
  53
  54 static inline DC *get_dc_obj( HDC hdc )
  55 {
  56     DC *dc = GDI_GetObjPtr( hdc, 0 );
  57     if (!dc) return NULL;
  58
  59     if ((dc->header.type != OBJ_DC) &&
  60         (dc->header.type != OBJ_MEMDC) &&
  61         (dc->header.type != OBJ_METADC) &&
  62         (dc->header.type != OBJ_ENHMETADC))
  63     {
  64         GDI_ReleaseObj( hdc );
  65         SetLastError( ERROR_INVALID_HANDLE );
  66         dc = NULL;
  67     }
  68     return dc;
  69 }
  70
  71
  72 /***********************************************************************
  73  *           alloc_dc_ptr
  74  */
  75 DC *alloc_dc_ptr( const DC_FUNCTIONS *funcs, WORD magic )
  76 {
  77     DC *dc;
  78
  79     if (!(dc = HeapAlloc( GetProcessHeap(), 0, sizeof(*dc) ))) return NULL;
  80
  81     dc->funcs               = funcs;
  82     dc->physDev             = NULL;
  83     dc->thread              = GetCurrentThreadId();
  84     dc->refcount            = 1;
  85     dc->dirty               = 0;
  86     dc->saveLevel           = 0;
  87     dc->saved_dc            = 0;
  88     dc->dwHookData          = 0;
  89     dc->hookProc            = NULL;
  90     dc->wndOrgX             = 0;
  91     dc->wndOrgY             = 0;
  92     dc->wndExtX             = 1;
  93     dc->wndExtY             = 1;
  94     dc->vportOrgX           = 0;
  95     dc->vportOrgY           = 0;
  96     dc->vportExtX           = 1;
  97     dc->vportExtY           = 1;
  98     dc->miterLimit          = 10.0f; /* 10.0 is the default, from MSDN */
  99     dc->flags               = 0;
 100     dc->layout              = 0;
 101     dc->hClipRgn            = 0;
 102     dc->hMetaRgn            = 0;
 103     dc->hMetaClipRgn        = 0;
 104     dc->hVisRgn             = 0;
 105     dc->hPen                = GDI_inc_ref_count( GetStockObject( BLACK_PEN ));
 106     dc->hBrush              = GDI_inc_ref_count( GetStockObject( WHITE_BRUSH ));
 107     dc->hFont               = GDI_inc_ref_count( GetStockObject( SYSTEM_FONT ));
 108     dc->hBitmap             = 0;
 109     dc->hDevice             = 0;
 110     dc->hPalette            = GetStockObject( DEFAULT_PALETTE );
 111     dc->gdiFont             = 0;
 112     dc->font_code_page      = CP_ACP;
 113     dc->ROPmode             = R2_COPYPEN;
 114     dc->polyFillMode        = ALTERNATE;
 115     dc->stretchBltMode      = BLACKONWHITE;
 116     dc->relAbsMode          = ABSOLUTE;
 117     dc->backgroundMode      = OPAQUE;
 118     dc->backgroundColor     = RGB( 255, 255, 255 );
 119     dc->dcBrushColor        = RGB( 255, 255, 255 );
 120     dc->dcPenColor          = RGB( 0, 0, 0 );
 121     dc->textColor           = RGB( 0, 0, 0 );
 122     dc->brushOrgX           = 0;
 123     dc->brushOrgY           = 0;
 124     dc->textAlign           = TA_LEFT | TA_TOP | TA_NOUPDATECP;
 125     dc->charExtra           = 0;
 126     dc->breakExtra          = 0;
 127     dc->breakRem            = 0;
 128     dc->MapMode             = MM_TEXT;
 129     dc->GraphicsMode        = GM_COMPATIBLE;
 130     dc->pAbortProc          = NULL;
 131     dc->CursPosX            = 0;
 132     dc->CursPosY            = 0;
 133     dc->ArcDirection        = AD_COUNTERCLOCKWISE;
 134     dc->xformWorld2Wnd.eM11 = 1.0f;
 135     dc->xformWorld2Wnd.eM12 = 0.0f;
 136     dc->xformWorld2Wnd.eM21 = 0.0f;
 137     dc->xformWorld2Wnd.eM22 = 1.0f;
 138     dc->xformWorld2Wnd.eDx  = 0.0f;
 139     dc->xformWorld2Wnd.eDy  = 0.0f;
 140     dc->xformWorld2Vport    = dc->xformWorld2Wnd;
 141     dc->xformVport2World    = dc->xformWorld2Wnd;
 142     dc->vport2WorldValid    = TRUE;
 143     dc->BoundsRect.left     = 0;
 144     dc->BoundsRect.top      = 0;
 145     dc->BoundsRect.right    = 0;
 146     dc->BoundsRect.bottom   = 0;
 147     PATH_InitGdiPath(&dc->path);
 148
 149     if (!(dc->hSelf = alloc_gdi_handle( &dc->header, magic, &dc_funcs )))
 150     {
 151         HeapFree( GetProcessHeap(), 0, dc );
 152         dc = NULL;
 153     }
 154     return dc;
 155 }
 156
 157
 158
 159 /***********************************************************************
 160  *           free_dc_ptr
 161  */
 162 BOOL free_dc_ptr( DC *dc )
 163 {
 164     assert( dc->refcount == 1 );
 165     if (free_gdi_handle( dc->hSelf ) != dc) return FALSE;  /* shouldn't happen */
 166     if (dc->hClipRgn) DeleteObject( dc->hClipRgn );
 167     if (dc->hMetaRgn) DeleteObject( dc->hMetaRgn );
 168     if (dc->hMetaClipRgn) DeleteObject( dc->hMetaClipRgn );
 169     if (dc->hVisRgn) DeleteObject( dc->hVisRgn );
 170     PATH_DestroyGdiPath( &dc->path );
 171     return HeapFree( GetProcessHeap(), 0, dc );
 172 }
 173
 174
 175 /***********************************************************************
 176  *           get_dc_ptr
 177  *
 178  * Retrieve a DC pointer but release the GDI lock.
 179  */
 180 DC *get_dc_ptr( HDC hdc )
 181 {
 182     DC *dc = get_dc_obj( hdc );
 183     if (!dc) return NULL;
 184
 185     if (!InterlockedCompareExchange( &dc->refcount, 1, 0 ))
 186     {
 187         dc->thread = GetCurrentThreadId();
 188     }
 189     else if (dc->thread != GetCurrentThreadId())
 190     {
 191         WARN( "dc %p belongs to thread %04x\n", hdc, dc->thread );
 192         GDI_ReleaseObj( hdc );
 193         return NULL;
 194     }
 195     else InterlockedIncrement( &dc->refcount );
 196
 197     GDI_ReleaseObj( hdc );
 198     return dc;
 199 }
 200
 201
 202 /***********************************************************************
 203  *           release_dc_ptr
 204  */
 205 void release_dc_ptr( DC *dc )
 206 {
 207     LONG ref;
 208
 209     dc->thread = 0;
 210     ref = InterlockedDecrement( &dc->refcount );
 211     assert( ref >= 0 );
 212     if (ref) dc->thread = GetCurrentThreadId();  /* we still own it */
 213 }
 214
 215
 216 /***********************************************************************
 217  *           update_dc
 218  *
 219  * Make sure the DC vis region is up to date.
 220  * This function may call up to USER so the GDI lock should _not_
 221  * be held when calling it.
 222  */
 223 void update_dc( DC *dc )
 224 {
 225     if (InterlockedExchange( &dc->dirty, 0 ) && dc->hookProc)
 226         dc->hookProc( dc->hSelf, DCHC_INVALIDVISRGN, dc->dwHookData, 0 );
 227 }
 228
 229
 230 /***********************************************************************
 231  *           DC_DeleteObject
 232  */
 233 static BOOL DC_DeleteObject( HGDIOBJ handle )
 234 {
 235     return DeleteDC( handle );
 236 }
 237
 238
 239 /***********************************************************************
 240  *           DC_InitDC
 241  *
 242  * Setup device-specific DC values for a newly created DC.
 243  */
 244 void DC_InitDC( DC* dc )
 245 {
 246     if (dc->funcs->pRealizeDefaultPalette) dc->funcs->pRealizeDefaultPalette( dc->physDev );
 247     SetTextColor( dc->hSelf, dc->textColor );
 248     SetBkColor( dc->hSelf, dc->backgroundColor );
 249     SelectObject( dc->hSelf, dc->hPen );
 250     SelectObject( dc->hSelf, dc->hBrush );
 251     SelectObject( dc->hSelf, dc->hFont );
 252     CLIPPING_UpdateGCRegion( dc );
 253     SetVirtualResolution( dc->hSelf, 0, 0, 0, 0 );
 254 }
 255
 256
 257 /***********************************************************************
 258  *           DC_InvertXform
 259  *
 260  * Computes the inverse of the transformation xformSrc and stores it to
 261  * xformDest. Returns TRUE if successful or FALSE if the xformSrc matrix
 262  * is singular.
 263  */
 264 static BOOL DC_InvertXform( const XFORM *xformSrc, XFORM *xformDest )
 265 {
 266     double determinant;
 267
 268     determinant = xformSrc->eM11*xformSrc->eM22 -
 269         xformSrc->eM12*xformSrc->eM21;
 270     if (determinant > -1e-12 && determinant < 1e-12)
 271         return FALSE;
 272
 273     xformDest->eM11 =  xformSrc->eM22 / determinant;
 274     xformDest->eM12 = -xformSrc->eM12 / determinant;
 275     xformDest->eM21 = -xformSrc->eM21 / determinant;
 276     xformDest->eM22 =  xformSrc->eM11 / determinant;
 277     xformDest->eDx  = -xformSrc->eDx * xformDest->eM11 -
 278                        xformSrc->eDy * xformDest->eM21;
 279     xformDest->eDy  = -xformSrc->eDx * xformDest->eM12 -
 280                        xformSrc->eDy * xformDest->eM22;
 281
 282     return TRUE;
 283 }
 284
 285 /* Construct a transformation to do the window-to-viewport conversion */
 286 static void construct_window_to_viewport(DC *dc, XFORM *xform)
 287 {
 288     double scaleX, scaleY;
 289     scaleX = (double)dc->vportExtX / (double)dc->wndExtX;
 290     scaleY = (double)dc->vportExtY / (double)dc->wndExtY;
 291
 292     if (dc->layout & LAYOUT_RTL) scaleX = -scaleX;
 293     xform->eM11 = scaleX;
 294     xform->eM12 = 0.0;
 295     xform->eM21 = 0.0;
 296     xform->eM22 = scaleY;
 297     xform->eDx  = (double)dc->vportOrgX - scaleX * (double)dc->wndOrgX;
 298     xform->eDy  = (double)dc->vportOrgY - scaleY * (double)dc->wndOrgY;
 299 }
 300
 301 /***********************************************************************
 302  *           DC_UpdateXforms
 303  *
 304  * Updates the xformWorld2Vport, xformVport2World and vport2WorldValid
 305  * fields of the specified DC by creating a transformation that
 306  * represents the current mapping mode and combining it with the DC's
 307  * world transform. This function should be called whenever the
 308  * parameters associated with the mapping mode (window and viewport
 309  * extents and origins) or the world transform change.
 310  */
 311 void DC_UpdateXforms( DC *dc )
 312 {
 313     XFORM xformWnd2Vport, oldworld2vport;
 314
 315     construct_window_to_viewport(dc, &xformWnd2Vport);
 316
 317     oldworld2vport = dc->xformWorld2Vport;
 318     /* Combine with the world transformation */
 319     CombineTransform( &dc->xformWorld2Vport, &dc->xformWorld2Wnd,
 320         &xformWnd2Vport );
 321
 322     /* Create inverse of world-to-viewport transformation */
 323     dc->vport2WorldValid = DC_InvertXform( &dc->xformWorld2Vport,
 324         &dc->xformVport2World );
 325
 326     /* Reselect the font and pen back into the dc so that the size
 327        gets updated. */
 328     if (memcmp(&oldworld2vport, &dc->xformWorld2Vport, sizeof(oldworld2vport)) &&
 329         !GdiIsMetaFileDC(dc->hSelf))
 330     {
 331         SelectObject(dc->hSelf, GetCurrentObject(dc->hSelf, OBJ_FONT));
 332         SelectObject(dc->hSelf, GetCurrentObject(dc->hSelf, OBJ_PEN));
 333     }
 334 }
 335
 336
 337 /***********************************************************************
 338  *           save_dc_state
 339  */
 340 INT save_dc_state( HDC hdc )
 341 {
 342     DC * newdc, * dc;
 343     INT ret;
 344
 345     if (!(dc = get_dc_ptr( hdc ))) return 0;
 346     if (!(newdc = HeapAlloc( GetProcessHeap(), 0, sizeof(*newdc ))))
 347     {
 348       release_dc_ptr( dc );
 349       return 0;
 350     }
 351
 352     newdc->flags            = dc->flags | DC_SAVED;
 353     newdc->layout           = dc->layout;
 354     newdc->hPen             = dc->hPen;
 355     newdc->hBrush           = dc->hBrush;
 356     newdc->hFont            = dc->hFont;
 357     newdc->hBitmap          = dc->hBitmap;
 358     newdc->hDevice          = dc->hDevice;
 359     newdc->hPalette         = dc->hPalette;
 360     newdc->ROPmode          = dc->ROPmode;
 361     newdc->polyFillMode     = dc->polyFillMode;
 362     newdc->stretchBltMode   = dc->stretchBltMode;
 363     newdc->relAbsMode       = dc->relAbsMode;
 364     newdc->backgroundMode   = dc->backgroundMode;
 365     newdc->backgroundColor  = dc->backgroundColor;
 366     newdc->textColor        = dc->textColor;
 367     newdc->dcBrushColor     = dc->dcBrushColor;
 368     newdc->dcPenColor       = dc->dcPenColor;
 369     newdc->brushOrgX        = dc->brushOrgX;
 370     newdc->brushOrgY        = dc->brushOrgY;
 371     newdc->textAlign        = dc->textAlign;
 372     newdc->charExtra        = dc->charExtra;
 373     newdc->breakExtra       = dc->breakExtra;
 374     newdc->breakRem         = dc->breakRem;
 375     newdc->MapMode          = dc->MapMode;
 376     newdc->GraphicsMode     = dc->GraphicsMode;
 377     newdc->CursPosX         = dc->CursPosX;
 378     newdc->CursPosY         = dc->CursPosY;
 379     newdc->ArcDirection     = dc->ArcDirection;
 380     newdc->xformWorld2Wnd   = dc->xformWorld2Wnd;
 381     newdc->xformWorld2Vport = dc->xformWorld2Vport;
 382     newdc->xformVport2World = dc->xformVport2World;
 383     newdc->vport2WorldValid = dc->vport2WorldValid;
 384     newdc->wndOrgX          = dc->wndOrgX;
 385     newdc->wndOrgY          = dc->wndOrgY;
 386     newdc->wndExtX          = dc->wndExtX;
 387     newdc->wndExtY          = dc->wndExtY;
 388     newdc->vportOrgX        = dc->vportOrgX;
 389     newdc->vportOrgY        = dc->vportOrgY;
 390     newdc->vportExtX        = dc->vportExtX;
 391     newdc->vportExtY        = dc->vportExtY;
 392     newdc->virtual_res      = dc->virtual_res;
 393     newdc->virtual_size     = dc->virtual_size;
 394     newdc->BoundsRect       = dc->BoundsRect;
 395     newdc->gdiFont          = dc->gdiFont;
 396
 397     newdc->thread    = GetCurrentThreadId();
 398     newdc->refcount  = 1;
 399     newdc->saveLevel = 0;
 400     newdc->saved_dc  = 0;
 401
 402     PATH_InitGdiPath( &newdc->path );
 403
 404     newdc->pAbortProc = NULL;
 405     newdc->hookProc   = NULL;
 406
 407     if (!(newdc->hSelf = alloc_gdi_handle( &newdc->header, dc->header.type, &dc_funcs )))
 408     {
 409         HeapFree( GetProcessHeap(), 0, newdc );
 410         release_dc_ptr( dc );
 411         return 0;
 412     }
 413
 414     /* Get/SetDCState() don't change hVisRgn field ("Undoc. Windows" p.559). */
 415
 416     newdc->hVisRgn      = 0;
 417     newdc->hClipRgn     = 0;
 418     newdc->hMetaRgn     = 0;
 419     newdc->hMetaClipRgn = 0;
 420     if (dc->hClipRgn)
 421     {
 422         newdc->hClipRgn = CreateRectRgn( 0, 0, 0, 0 );
 423         CombineRgn( newdc->hClipRgn, dc->hClipRgn, 0, RGN_COPY );
 424     }
 425     if (dc->hMetaRgn)
 426     {
 427         newdc->hMetaRgn = CreateRectRgn( 0, 0, 0, 0 );
 428         CombineRgn( newdc->hMetaRgn, dc->hMetaRgn, 0, RGN_COPY );
 429     }
 430     /* don't bother recomputing hMetaClipRgn, we'll do that in SetDCState */
 431
 432     if (!PATH_AssignGdiPath( &newdc->path, &dc->path ))
 433     {
 434         release_dc_ptr( dc );
 435         free_dc_ptr( newdc );
 436         return 0;
 437     }
 438
 439     newdc->saved_dc = dc->saved_dc;
 440     dc->saved_dc = newdc->hSelf;
 441     ret = ++dc->saveLevel;
 442     release_dc_ptr( newdc );
 443     release_dc_ptr( dc );
 444     return ret;
 445 }
 446
 447
 448 /***********************************************************************
 449  *           restore_dc_state
 450  */
 451 BOOL restore_dc_state( HDC hdc, INT level )
 452 {
 453     HDC hdcs, first_dcs;
 454     DC *dc, *dcs;
 455     INT save_level;
 456
 457     if (!(dc = get_dc_ptr( hdc ))) return FALSE;
 458
 459     /* find the state level to restore */
 460
 461     if (abs(level) > dc->saveLevel || level == 0)
 462     {
 463         release_dc_ptr( dc );
 464         return FALSE;
 465     }
 466     if (level < 0) level = dc->saveLevel + level + 1;
 467     first_dcs = dc->saved_dc;
 468     for (hdcs = first_dcs, save_level = dc->saveLevel; save_level > level; save_level--)
 469     {
 470         if (!(dcs = get_dc_ptr( hdcs )))
 471         {
 472             release_dc_ptr( dc );
 473             return FALSE;
 474         }
 475         hdcs = dcs->saved_dc;
 476         release_dc_ptr( dcs );
 477     }
 478
 479     /* restore the state */
 480
 481     if (!(dcs = get_dc_ptr( hdcs )))
 482     {
 483         release_dc_ptr( dc );
 484         return FALSE;
 485     }
 486     if (!PATH_AssignGdiPath( &dc->path, &dcs->path ))
 487     {
 488         release_dc_ptr( dcs );
 489         release_dc_ptr( dc );
 490         return FALSE;
 491     }
 492
 493     dc->flags            = dcs->flags & ~DC_SAVED;
 494     dc->layout           = dcs->layout;
 495     dc->hDevice          = dcs->hDevice;
 496     dc->ROPmode          = dcs->ROPmode;
 497     dc->polyFillMode     = dcs->polyFillMode;
 498     dc->stretchBltMode   = dcs->stretchBltMode;
 499     dc->relAbsMode       = dcs->relAbsMode;
 500     dc->backgroundMode   = dcs->backgroundMode;
 501     dc->backgroundColor  = dcs->backgroundColor;
 502     dc->textColor        = dcs->textColor;
 503     dc->dcBrushColor     = dcs->dcBrushColor;
 504     dc->dcPenColor       = dcs->dcPenColor;
 505     dc->brushOrgX        = dcs->brushOrgX;
 506     dc->brushOrgY        = dcs->brushOrgY;
 507     dc->textAlign        = dcs->textAlign;
 508     dc->charExtra        = dcs->charExtra;
 509     dc->breakExtra       = dcs->breakExtra;
 510     dc->breakRem         = dcs->breakRem;
 511     dc->MapMode          = dcs->MapMode;
 512     dc->GraphicsMode     = dcs->GraphicsMode;
 513     dc->CursPosX         = dcs->CursPosX;
 514     dc->CursPosY         = dcs->CursPosY;
 515     dc->ArcDirection     = dcs->ArcDirection;
 516     dc->xformWorld2Wnd   = dcs->xformWorld2Wnd;
 517     dc->xformWorld2Vport = dcs->xformWorld2Vport;
 518     dc->xformVport2World = dcs->xformVport2World;
 519     dc->vport2WorldValid = dcs->vport2WorldValid;
 520     dc->BoundsRect       = dcs->BoundsRect;
 521
 522     dc->wndOrgX          = dcs->wndOrgX;
 523     dc->wndOrgY          = dcs->wndOrgY;
 524     dc->wndExtX          = dcs->wndExtX;
 525     dc->wndExtY          = dcs->wndExtY;
 526     dc->vportOrgX        = dcs->vportOrgX;
 527     dc->vportOrgY        = dcs->vportOrgY;
 528     dc->vportExtX        = dcs->vportExtX;
 529     dc->vportExtY        = dcs->vportExtY;
 530     dc->virtual_res      = dcs->virtual_res;
 531     dc->virtual_size     = dcs->virtual_size;
 532
 533     if (dcs->hClipRgn)
 534     {
 535         if (!dc->hClipRgn) dc->hClipRgn = CreateRectRgn( 0, 0, 0, 0 );
 536         CombineRgn( dc->hClipRgn, dcs->hClipRgn, 0, RGN_COPY );
 537     }
 538     else
 539     {
 540         if (dc->hClipRgn) DeleteObject( dc->hClipRgn );
 541         dc->hClipRgn = 0;
 542     }
 543     if (dcs->hMetaRgn)
 544     {
 545         if (!dc->hMetaRgn) dc->hMetaRgn = CreateRectRgn( 0, 0, 0, 0 );
 546         CombineRgn( dc->hMetaRgn, dcs->hMetaRgn, 0, RGN_COPY );
 547     }
 548     else
 549     {
 550         if (dc->hMetaRgn) DeleteObject( dc->hMetaRgn );
 551         dc->hMetaRgn = 0;
 552     }
 553     CLIPPING_UpdateGCRegion( dc );
 554
 555     SelectObject( hdc, dcs->hBitmap );
 556     SelectObject( hdc, dcs->hBrush );
 557     SelectObject( hdc, dcs->hFont );
 558     SelectObject( hdc, dcs->hPen );
 559     SetBkColor( hdc, dcs->backgroundColor);
 560     SetTextColor( hdc, dcs->textColor);
 561     GDISelectPalette( hdc, dcs->hPalette, FALSE );
 562
 563     dc->saved_dc  = dcs->saved_dc;
 564     dcs->saved_dc = 0;
 565     dc->saveLevel = save_level - 1;
 566
 567     release_dc_ptr( dcs );
 568
 569     /* now destroy all the saved DCs */
 570
 571     while (first_dcs)
 572     {
 573         if (!(dcs = get_dc_ptr( first_dcs ))) break;
 574         hdcs = dcs->saved_dc;
 575         free_dc_ptr( dcs );
 576         first_dcs = hdcs;
 577     }
 578     release_dc_ptr( dc );
 579     return TRUE;
 580 }
 581
 582
 583 /***********************************************************************
 584  *           SaveDC    (GDI32.@)
 585  */
 586 INT WINAPI SaveDC( HDC hdc )
 587 {
 588     DC * dc;
 589     INT ret;
 590
 591     if (!(dc = get_dc_ptr( hdc ))) return 0;
 592
 593     if(dc->funcs->pSaveDC)
 594         ret = dc->funcs->pSaveDC( dc->physDev );
 595     else
 596         ret = save_dc_state( hdc );
 597
 598     release_dc_ptr( dc );
 599     return ret;
 600 }
 601
 602
 603 /***********************************************************************
 604  *           RestoreDC    (GDI32.@)
 605  */
 606 BOOL WINAPI RestoreDC( HDC hdc, INT level )
 607 {
 608     DC *dc;
 609     BOOL success;
 610
 611     TRACE("%p %d\n", hdc, level );
 612     if (!(dc = get_dc_ptr( hdc ))) return FALSE;
 613     update_dc( dc );
 614
 615     if(dc->funcs->pRestoreDC)
 616         success = dc->funcs->pRestoreDC( dc->physDev, level );
 617     else
 618         success = restore_dc_state( hdc, level );
 619
 620     release_dc_ptr( dc );
 621     return success;
 622 }
 623
 624
 625 /***********************************************************************
 626  *           CreateDCW    (GDI32.@)
 627  */
 628 HDC WINAPI CreateDCW( LPCWSTR driver, LPCWSTR device, LPCWSTR output,
 629                       const DEVMODEW *initData )
 630 {
 631     HDC hdc;
 632     DC * dc;
 633     const DC_FUNCTIONS *funcs;
 634     WCHAR buf[300];
 635
 636     GDI_CheckNotLock();
 637
 638     if (!device || !DRIVER_GetDriverName( device, buf, 300 ))
 639     {
 640         if (!driver)
 641         {
 642             ERR( "no device found for %s\n", debugstr_w(device) );
 643             return 0;
 644         }
 645         strcpyW(buf, driver);
 646     }
 647
 648     if (!(funcs = DRIVER_load_driver( buf )))
 649     {
 650         ERR( "no driver found for %s\n", debugstr_w(buf) );
 651         return 0;
 652     }
 653     if (!(dc = alloc_dc_ptr( funcs, OBJ_DC ))) goto error;
 654     hdc = dc->hSelf;
 655
 656     dc->hBitmap = GDI_inc_ref_count( GetStockObject( DEFAULT_BITMAP ));
 657     if (!(dc->hVisRgn = CreateRectRgn( 0, 0, 1, 1 ))) goto error;
 658
 659     TRACE("(driver=%s, device=%s, output=%s): returning %p\n",
 660           debugstr_w(driver), debugstr_w(device), debugstr_w(output), dc->hSelf );
 661
 662     if (dc->funcs->pCreateDC &&
 663         !dc->funcs->pCreateDC( hdc, &dc->physDev, buf, device, output, initData ))
 664     {
 665         WARN("creation aborted by device\n" );
 666         goto error;
 667     }
 668
 669     dc->vis_rect.left   = 0;
 670     dc->vis_rect.top    = 0;
 671     dc->vis_rect.right  = GetDeviceCaps( hdc, DESKTOPHORZRES );
 672     dc->vis_rect.bottom = GetDeviceCaps( hdc, DESKTOPVERTRES );
 673     SetRectRgn(dc->hVisRgn, dc->vis_rect.left, dc->vis_rect.top, dc->vis_rect.right, dc->vis_rect.bottom);
 674
 675     DC_InitDC( dc );
 676     release_dc_ptr( dc );
 677     return hdc;
 678
 679 error:
 680     if (dc) free_dc_ptr( dc );
 681     return 0;
 682 }
 683
 684
 685 /***********************************************************************
 686  *           CreateDCA    (GDI32.@)
 687  */
 688 HDC WINAPI CreateDCA( LPCSTR driver, LPCSTR device, LPCSTR output,
 689                       const DEVMODEA *initData )
 690 {
 691     UNICODE_STRING driverW, deviceW, outputW;
 692     DEVMODEW *initDataW;
 693     HDC ret;
 694
 695     if (driver) RtlCreateUnicodeStringFromAsciiz(&driverW, driver);
 696     else driverW.Buffer = NULL;
 697
 698     if (device) RtlCreateUnicodeStringFromAsciiz(&deviceW, device);
 699     else deviceW.Buffer = NULL;
 700
 701     if (output) RtlCreateUnicodeStringFromAsciiz(&outputW, output);
 702     else outputW.Buffer = NULL;
 703
 704     initDataW = NULL;
 705     if (initData)
 706     {
 707         /* don't convert initData for DISPLAY driver, it's not used */
 708         if (!driverW.Buffer || strcmpiW( driverW.Buffer, displayW ))
 709             initDataW = GdiConvertToDevmodeW(initData);
 710     }
 711
 712     ret = CreateDCW( driverW.Buffer, deviceW.Buffer, outputW.Buffer, initDataW );
 713
 714     RtlFreeUnicodeString(&driverW);
 715     RtlFreeUnicodeString(&deviceW);
 716     RtlFreeUnicodeString(&outputW);
 717     HeapFree(GetProcessHeap(), 0, initDataW);
 718     return ret;
 719 }
 720
 721
 722 /***********************************************************************
 723  *           CreateICA    (GDI32.@)
 724  */
 725 HDC WINAPI CreateICA( LPCSTR driver, LPCSTR device, LPCSTR output,
 726                           const DEVMODEA* initData )
 727 {
 728       /* Nothing special yet for ICs */
 729     return CreateDCA( driver, device, output, initData );
 730 }
 731
 732
 733 /***********************************************************************
 734  *           CreateICW    (GDI32.@)
 735  */
 736 HDC WINAPI CreateICW( LPCWSTR driver, LPCWSTR device, LPCWSTR output,
 737                           const DEVMODEW* initData )
 738 {
 739       /* Nothing special yet for ICs */
 740     return CreateDCW( driver, device, output, initData );
 741 }
 742
 743
 744 /***********************************************************************
 745  *           CreateCompatibleDC   (GDI32.@)
 746  */
 747 HDC WINAPI CreateCompatibleDC( HDC hdc )
 748 {
 749     DC *dc, *origDC;
 750     HDC ret;
 751     const DC_FUNCTIONS *funcs = NULL;
 752     PHYSDEV physDev = NULL;
 753
 754     GDI_CheckNotLock();
 755
 756     if (hdc)
 757     {
 758         if (!(origDC = get_dc_ptr( hdc ))) return 0;
 759         if (GetObjectType( hdc ) == OBJ_DC)
 760         {
 761             funcs = origDC->funcs;
 762             physDev = origDC->physDev;
 763         }
 764         release_dc_ptr( origDC );
 765     }
 766
 767     if (!funcs && !(funcs = DRIVER_get_display_driver())) return 0;
 768
 769     if (!(dc = alloc_dc_ptr( funcs, OBJ_MEMDC ))) goto error;
 770
 771     TRACE("(%p): returning %p\n", hdc, dc->hSelf );
 772
 773     dc->hBitmap = GDI_inc_ref_count( GetStockObject( DEFAULT_BITMAP ));
 774     dc->vis_rect.left   = 0;
 775     dc->vis_rect.top    = 0;
 776     dc->vis_rect.right  = 1;
 777     dc->vis_rect.bottom = 1;
 778     if (!(dc->hVisRgn = CreateRectRgn( 0, 0, 1, 1 ))) goto error;   /* default bitmap is 1x1 */
 779
 780     /* Copy the driver-specific physical device info into
 781      * the new DC. The driver may use this read-only info
 782      * while creating the compatible DC below. */
 783     dc->physDev = physDev;
 784     ret = dc->hSelf;
 785
 786     if (dc->funcs->pCreateDC &&
 787         !dc->funcs->pCreateDC( dc->hSelf, &dc->physDev, NULL, NULL, NULL, NULL ))
 788     {
 789         WARN("creation aborted by device\n");
 790         goto error;
 791     }
 792
 793     DC_InitDC( dc );
 794     release_dc_ptr( dc );
 795     return ret;
 796
 797 error:
 798     if (dc) free_dc_ptr( dc );
 799     return 0;
 800 }
 801
 802
 803 /***********************************************************************
 804  *           DeleteDC    (GDI32.@)
 805  */
 806 BOOL WINAPI DeleteDC( HDC hdc )
 807 {
 808     DC * dc;
 809
 810     TRACE("%p\n", hdc );
 811
 812     GDI_CheckNotLock();
 813
 814     if (!(dc = get_dc_ptr( hdc ))) return FALSE;
 815     if (dc->refcount != 1)
 816     {
 817         FIXME( "not deleting busy DC %p refcount %u\n", dc->hSelf, dc->refcount );
 818         release_dc_ptr( dc );
 819         return FALSE;
 820     }
 821
 822     /* Call hook procedure to check whether is it OK to delete this DC */
 823     if (dc->hookProc && !dc->hookProc( hdc, DCHC_DELETEDC, dc->dwHookData, 0 ))
 824     {
 825         release_dc_ptr( dc );
 826         return TRUE;
 827     }
 828
 829     while (dc->saveLevel)
 830     {
 831         DC * dcs;
 832         HDC hdcs = dc->saved_dc;
 833         if (!(dcs = get_dc_ptr( hdcs ))) break;
 834         dc->saved_dc = dcs->saved_dc;
 835         dc->saveLevel--;
 836         free_dc_ptr( dcs );
 837     }
 838
 839     if (!(dc->flags & DC_SAVED))
 840     {
 841         SelectObject( hdc, GetStockObject(BLACK_PEN) );
 842         SelectObject( hdc, GetStockObject(WHITE_BRUSH) );
 843         SelectObject( hdc, GetStockObject(SYSTEM_FONT) );
 844         SelectObject( hdc, GetStockObject(DEFAULT_BITMAP) );
 845         if (dc->funcs->pDeleteDC) dc->funcs->pDeleteDC(dc->physDev);
 846         dc->physDev = NULL;
 847     }
 848
 849     free_dc_ptr( dc );
 850     return TRUE;
 851 }
 852
 853
 854 /***********************************************************************
 855  *           ResetDCW    (GDI32.@)
 856  */
 857 HDC WINAPI ResetDCW( HDC hdc, const DEVMODEW *devmode )
 858 {
 859     DC *dc;
 860     HDC ret = hdc;
 861
 862     if ((dc = get_dc_ptr( hdc )))
 863     {
 864         if (dc->funcs->pResetDC)
 865         {
 866             ret = dc->funcs->pResetDC( dc->physDev, devmode );
 867             if (ret)  /* reset the visible region */
 868             {
 869                 dc->dirty = 0;
 870                 dc->vis_rect.left   = 0;
 871                 dc->vis_rect.top    = 0;
 872                 dc->vis_rect.right  = GetDeviceCaps( hdc, DESKTOPHORZRES );
 873                 dc->vis_rect.bottom = GetDeviceCaps( hdc, DESKTOPVERTRES );
 874                 SetRectRgn( dc->hVisRgn, dc->vis_rect.left, dc->vis_rect.top,
 875                             dc->vis_rect.right, dc->vis_rect.bottom );
 876                 CLIPPING_UpdateGCRegion( dc );
 877             }
 878         }
 879         release_dc_ptr( dc );
 880     }
 881     return ret;
 882 }
 883
 884
 885 /***********************************************************************
 886  *           ResetDCA    (GDI32.@)
 887  */
 888 HDC WINAPI ResetDCA( HDC hdc, const DEVMODEA *devmode )
 889 {
 890     DEVMODEW *devmodeW;
 891     HDC ret;
 892
 893     if (devmode) devmodeW = GdiConvertToDevmodeW(devmode);
 894     else devmodeW = NULL;
 895
 896     ret = ResetDCW(hdc, devmodeW);
 897
 898     HeapFree(GetProcessHeap(), 0, devmodeW);
 899     return ret;
 900 }
 901
 902
 903 /***********************************************************************
 904  *           GetDeviceCaps    (GDI32.@)
 905  */
 906 INT WINAPI GetDeviceCaps( HDC hdc, INT cap )
 907 {
 908     DC *dc;
 909     INT ret = 0;
 910
 911     if ((dc = get_dc_ptr( hdc )))
 912     {
 913         if (dc->funcs->pGetDeviceCaps) ret = dc->funcs->pGetDeviceCaps( dc->physDev, cap );
 914         else switch(cap)  /* return meaningful values for some entries */
 915         {
 916         case HORZRES:     ret = 640; break;
 917         case VERTRES:     ret = 480; break;
 918         case BITSPIXEL:   ret = 1; break;
 919         case PLANES:      ret = 1; break;
 920         case NUMCOLORS:   ret = 2; break;
 921         case ASPECTX:     ret = 36; break;
 922         case ASPECTY:     ret = 36; break;
 923         case ASPECTXY:    ret = 51; break;
 924         case LOGPIXELSX:  ret = 72; break;
 925         case LOGPIXELSY:  ret = 72; break;
 926         case SIZEPALETTE: ret = 2; break;
 927         case TEXTCAPS:
 928             ret = (TC_OP_CHARACTER | TC_OP_STROKE | TC_CP_STROKE |
 929                    TC_CR_ANY | TC_SF_X_YINDEP | TC_SA_DOUBLE | TC_SA_INTEGER |
 930                    TC_SA_CONTIN | TC_UA_ABLE | TC_SO_ABLE | TC_RA_ABLE | TC_VA_ABLE);
 931             break;
 932         }
 933         release_dc_ptr( dc );
 934     }
 935     return ret;
 936 }
 937
 938
 939 /***********************************************************************
 940  *              GetBkColor (GDI32.@)
 941  */
 942 COLORREF WINAPI GetBkColor( HDC hdc )
 943 {
 944     COLORREF ret = 0;
 945     DC * dc = get_dc_ptr( hdc );
 946     if (dc)
 947     {
 948         ret = dc->backgroundColor;
 949         release_dc_ptr( dc );
 950     }
 951     return ret;
 952 }
 953
 954
 955 /***********************************************************************
 956  *           SetBkColor    (GDI32.@)
 957  */
 958 COLORREF WINAPI SetBkColor( HDC hdc, COLORREF color )
 959 {
 960     COLORREF oldColor;
 961     DC * dc = get_dc_ptr( hdc );
 962
 963     TRACE("hdc=%p color=0x%08x\n", hdc, color);
 964
 965     if (!dc) return CLR_INVALID;
 966     oldColor = dc->backgroundColor;
 967     if (dc->funcs->pSetBkColor)
 968     {
 969         color = dc->funcs->pSetBkColor(dc->physDev, color);
 970         if (color == CLR_INVALID)  /* don't change it */
 971         {
 972             color = oldColor;
 973             oldColor = CLR_INVALID;
 974         }
 975     }
 976     dc->backgroundColor = color;
 977     release_dc_ptr( dc );
 978     return oldColor;
 979 }
 980
 981
 982 /***********************************************************************
 983  *              GetTextColor (GDI32.@)
 984  */
 985 COLORREF WINAPI GetTextColor( HDC hdc )
 986 {
 987     COLORREF ret = 0;
 988     DC * dc = get_dc_ptr( hdc );
 989     if (dc)
 990     {
 991         ret = dc->textColor;
 992         release_dc_ptr( dc );
 993     }
 994     return ret;
 995 }
 996
 997
 998 /***********************************************************************
 999  *           SetTextColor    (GDI32.@)
1000  */
1001 COLORREF WINAPI SetTextColor( HDC hdc, COLORREF color )
1002 {
1003     COLORREF oldColor;
1004     DC * dc = get_dc_ptr( hdc );
1005
1006     TRACE(" hdc=%p color=0x%08x\n", hdc, color);
1007
1008     if (!dc) return CLR_INVALID;
1009     oldColor = dc->textColor;
1010     if (dc->funcs->pSetTextColor)
1011     {
1012         color = dc->funcs->pSetTextColor(dc->physDev, color);
1013         if (color == CLR_INVALID)  /* don't change it */
1014         {
1015             color = oldColor;
1016             oldColor = CLR_INVALID;
1017         }
1018     }
1019     dc->textColor = color;
1020     release_dc_ptr( dc );
1021     return oldColor;
1022 }
1023
1024
1025 /***********************************************************************
1026  *              GetTextAlign (GDI32.@)
1027  */
1028 UINT WINAPI GetTextAlign( HDC hdc )
1029 {
1030     UINT ret = 0;
1031     DC * dc = get_dc_ptr( hdc );
1032     if (dc)
1033     {
1034         ret = dc->textAlign;
1035         release_dc_ptr( dc );
1036     }
1037     return ret;
1038 }
1039
1040
1041 /***********************************************************************
1042  *           SetTextAlign    (GDI32.@)
1043  */
1044 UINT WINAPI SetTextAlign( HDC hdc, UINT align )
1045 {
1046     UINT ret;
1047     DC *dc = get_dc_ptr( hdc );
1048
1049     TRACE("hdc=%p align=%d\n", hdc, align);
1050
1051     if (!dc) return 0x0;
1052     ret = dc->textAlign;
1053     if (dc->funcs->pSetTextAlign)
1054         if (!dc->funcs->pSetTextAlign(dc->physDev, align))
1055             ret = GDI_ERROR;
1056     if (ret != GDI_ERROR)
1057         dc->textAlign = align;
1058     release_dc_ptr( dc );
1059     return ret;
1060 }
1061
1062 /***********************************************************************
1063  *           GetDCOrgEx  (GDI32.@)
1064  */
1065 BOOL WINAPI GetDCOrgEx( HDC hDC, LPPOINT lpp )
1066 {
1067     DC * dc;
1068
1069     if (!lpp) return FALSE;
1070     if (!(dc = get_dc_ptr( hDC ))) return FALSE;
1071
1072     lpp->x = lpp->y = 0;
1073     if (dc->funcs->pGetDCOrgEx) dc->funcs->pGetDCOrgEx( dc->physDev, lpp );
1074     release_dc_ptr( dc );
1075     return TRUE;
1076 }
1077
1078
1079 /***********************************************************************
1080  *              GetGraphicsMode (GDI32.@)
1081  */
1082 INT WINAPI GetGraphicsMode( HDC hdc )
1083 {
1084     INT ret = 0;
1085     DC * dc = get_dc_ptr( hdc );
1086     if (dc)
1087     {
1088         ret = dc->GraphicsMode;
1089         release_dc_ptr( dc );
1090     }
1091     return ret;
1092 }
1093
1094
1095 /***********************************************************************
1096  *           SetGraphicsMode    (GDI32.@)
1097  */
1098 INT WINAPI SetGraphicsMode( HDC hdc, INT mode )
1099 {
1100     INT ret = 0;
1101     DC *dc = get_dc_ptr( hdc );
1102
1103     /* One would think that setting the graphics mode to GM_COMPATIBLE
1104      * would also reset the world transformation matrix to the unity
1105      * matrix. However, in Windows, this is not the case. This doesn't
1106      * make a lot of sense to me, but that's the way it is.
1107      */
1108     if (!dc) return 0;
1109     if ((mode > 0) && (mode <= GM_LAST))
1110     {
1111         ret = dc->GraphicsMode;
1112         dc->GraphicsMode = mode;
1113     }
1114     release_dc_ptr( dc );
1115     return ret;
1116 }
1117
1118
1119 /***********************************************************************
1120  *              GetArcDirection (GDI32.@)
1121  */
1122 INT WINAPI GetArcDirection( HDC hdc )
1123 {
1124     INT ret = 0;
1125     DC * dc = get_dc_ptr( hdc );
1126     if (dc)
1127     {
1128         ret = dc->ArcDirection;
1129         release_dc_ptr( dc );
1130     }
1131     return ret;
1132 }
1133
1134
1135 /***********************************************************************
1136  *           SetArcDirection    (GDI32.@)
1137  */
1138 INT WINAPI SetArcDirection( HDC hdc, INT nDirection )
1139 {
1140     DC * dc;
1141     INT nOldDirection = 0;
1142
1143     if (nDirection!=AD_COUNTERCLOCKWISE && nDirection!=AD_CLOCKWISE)
1144     {
1145         SetLastError(ERROR_INVALID_PARAMETER);
1146         return 0;
1147     }
1148
1149     if ((dc = get_dc_ptr( hdc )))
1150     {
1151         if (dc->funcs->pSetArcDirection)
1152         {
1153             dc->funcs->pSetArcDirection(dc->physDev, nDirection);
1154         }
1155         nOldDirection = dc->ArcDirection;
1156         dc->ArcDirection = nDirection;
1157         release_dc_ptr( dc );
1158     }
1159     return nOldDirection;
1160 }
1161
1162
1163 /***********************************************************************
1164  *           GetWorldTransform    (GDI32.@)
1165  */
1166 BOOL WINAPI GetWorldTransform( HDC hdc, LPXFORM xform )
1167 {
1168     DC * dc;
1169     if (!xform) return FALSE;
1170     if (!(dc = get_dc_ptr( hdc ))) return FALSE;
1171     *xform = dc->xformWorld2Wnd;
1172     release_dc_ptr( dc );
1173     return TRUE;
1174 }
1175
1176
1177 /***********************************************************************
1178  *           GetTransform    (GDI32.@)
1179  *
1180  * Undocumented
1181  *
1182  * Returns one of the co-ordinate space transforms
1183  *
1184  * PARAMS
1185  *    hdc   [I] Device context.
1186  *    which [I] Which xform to return:
1187  *                  0x203 World -> Page transform (that set by SetWorldTransform).
1188  *                  0x304 Page -> Device transform (the mapping mode transform).
1189  *                  0x204 World -> Device transform (the combination of the above two).
1190  *                  0x402 Device -> World transform (the inversion of the above).
1191  *    xform [O] The xform.
1192  *
1193  */
1194 BOOL WINAPI GetTransform( HDC hdc, DWORD which, XFORM *xform )
1195 {
1196     BOOL ret = TRUE;
1197     DC *dc = get_dc_ptr( hdc );
1198     if (!dc) return FALSE;
1199
1200     switch(which)
1201     {
1202     case 0x203:
1203         *xform = dc->xformWorld2Wnd;
1204         break;
1205
1206     case 0x304:
1207         construct_window_to_viewport(dc, xform);
1208         break;
1209
1210     case 0x204:
1211         *xform = dc->xformWorld2Vport;
1212         break;
1213
1214     case 0x402:
1215         *xform = dc->xformVport2World;
1216         break;
1217
1218     default:
1219         FIXME("Unknown code %x\n", which);
1220         ret = FALSE;
1221     }
1222
1223     release_dc_ptr( dc );
1224     return ret;
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;
1235
1236     if (!xform) return FALSE;
1237
1238     dc = get_dc_ptr( hdc );
1239     if (!dc) return FALSE;
1240
1241     /* Check that graphics mode is GM_ADVANCED */
1242     if (dc->GraphicsMode!=GM_ADVANCED) goto done;
1243
1244     TRACE("eM11 %f eM12 %f eM21 %f eM22 %f eDx %f eDy %f\n",
1245         xform->eM11, xform->eM12, xform->eM21, xform->eM22, xform->eDx, xform->eDy);
1246
1247     /* The transform must conform to (eM11 * eM22 != eM12 * eM21) requirement */
1248     if (xform->eM11 * xform->eM22 == xform->eM12 * xform->eM21) goto done;
1249
1250     if (dc->funcs->pSetWorldTransform)
1251     {
1252         ret = dc->funcs->pSetWorldTransform(dc->physDev, xform);
1253         if (!ret) goto done;
1254     }
1255
1256     dc->xformWorld2Wnd = *xform;
1257     DC_UpdateXforms( dc );
1258     ret = TRUE;
1259  done:
1260     release_dc_ptr( dc );
1261     return ret;
1262 }
1263
1264
1265 /****************************************************************************
1266  * ModifyWorldTransform [GDI32.@]
1267  * Modifies the world transformation for a device context.
1268  *
1269  * PARAMS
1270  *    hdc   [I] Handle to device context
1271  *    xform [I] XFORM structure that will be used to modify the world
1272  *              transformation
1273  *    iMode [I] Specifies in what way to modify the world transformation
1274  *              Possible values:
1275  *              MWT_IDENTITY
1276  *                 Resets the world transformation to the identity matrix.
1277  *                 The parameter xform is ignored.
1278  *              MWT_LEFTMULTIPLY
1279  *                 Multiplies xform into the world transformation matrix from
1280  *                 the left.
1281  *              MWT_RIGHTMULTIPLY
1282  *                 Multiplies xform into the world transformation matrix from
1283  *                 the right.
1284  *
1285  * RETURNS
1286  *  Success: TRUE.
1287  *  Failure: FALSE. Use GetLastError() to determine the cause.
1288  */
1289 BOOL WINAPI ModifyWorldTransform( HDC hdc, const XFORM *xform,
1290     DWORD iMode )
1291 {
1292     BOOL ret = FALSE;
1293     DC *dc = get_dc_ptr( hdc );
1294
1295     /* Check for illegal parameters */
1296     if (!dc) return FALSE;
1297     if (!xform && iMode != MWT_IDENTITY) goto done;
1298
1299     /* Check that graphics mode is GM_ADVANCED */
1300     if (dc->GraphicsMode!=GM_ADVANCED) goto done;
1301
1302     if (dc->funcs->pModifyWorldTransform)
1303     {
1304         ret = dc->funcs->pModifyWorldTransform(dc->physDev, xform, iMode);
1305         if (!ret) goto done;
1306     }
1307
1308     switch (iMode)
1309     {
1310         case MWT_IDENTITY:
1311             dc->xformWorld2Wnd.eM11 = 1.0f;
1312             dc->xformWorld2Wnd.eM12 = 0.0f;
1313             dc->xformWorld2Wnd.eM21 = 0.0f;
1314             dc->xformWorld2Wnd.eM22 = 1.0f;
1315             dc->xformWorld2Wnd.eDx  = 0.0f;
1316             dc->xformWorld2Wnd.eDy  = 0.0f;
1317             break;
1318         case MWT_LEFTMULTIPLY:
1319             CombineTransform( &dc->xformWorld2Wnd, xform,
1320                 &dc->xformWorld2Wnd );
1321             break;
1322         case MWT_RIGHTMULTIPLY:
1323             CombineTransform( &dc->xformWorld2Wnd, &dc->xformWorld2Wnd,
1324                 xform );
1325             break;
1326         default:
1327             goto done;
1328     }
1329
1330     DC_UpdateXforms( dc );
1331     ret = TRUE;
1332  done:
1333     release_dc_ptr( dc );
1334     return ret;
1335 }
1336
1337
1338 /****************************************************************************
1339  * CombineTransform [GDI32.@]
1340  * Combines two transformation matrices.
1341  *
1342  * PARAMS
1343  *    xformResult [O] Stores the result of combining the two matrices
1344  *    xform1      [I] Specifies the first matrix to apply
1345  *    xform2      [I] Specifies the second matrix to apply
1346  *
1347  * REMARKS
1348  *    The same matrix can be passed in for more than one of the parameters.
1349  *
1350  * RETURNS
1351  *  Success: TRUE.
1352  *  Failure: FALSE. Use GetLastError() to determine the cause.
1353  */
1354 BOOL WINAPI CombineTransform( LPXFORM xformResult, const XFORM *xform1,
1355     const XFORM *xform2 )
1356 {
1357     XFORM xformTemp;
1358
1359     /* Check for illegal parameters */
1360     if (!xformResult || !xform1 || !xform2)
1361         return FALSE;
1362
1363     /* Create the result in a temporary XFORM, since xformResult may be
1364      * equal to xform1 or xform2 */
1365     xformTemp.eM11 = xform1->eM11 * xform2->eM11 +
1366                      xform1->eM12 * xform2->eM21;
1367     xformTemp.eM12 = xform1->eM11 * xform2->eM12 +
1368                      xform1->eM12 * xform2->eM22;
1369     xformTemp.eM21 = xform1->eM21 * xform2->eM11 +
1370                      xform1->eM22 * xform2->eM21;
1371     xformTemp.eM22 = xform1->eM21 * xform2->eM12 +
1372                      xform1->eM22 * xform2->eM22;
1373     xformTemp.eDx  = xform1->eDx  * xform2->eM11 +
1374                      xform1->eDy  * xform2->eM21 +
1375                      xform2->eDx;
1376     xformTemp.eDy  = xform1->eDx  * xform2->eM12 +
1377                      xform1->eDy  * xform2->eM22 +
1378                      xform2->eDy;
1379
1380     /* Copy the result to xformResult */
1381     *xformResult = xformTemp;
1382
1383     return TRUE;
1384 }
1385
1386
1387 /***********************************************************************
1388  *           SetDCHook   (GDI32.@)
1389  *
1390  * Note: this doesn't exist in Win32, we add it here because user32 needs it.
1391  */
1392 BOOL WINAPI SetDCHook( HDC hdc, DCHOOKPROC hookProc, DWORD_PTR dwHookData )
1393 {
1394     DC *dc = get_dc_ptr( hdc );
1395
1396     if (!dc) return FALSE;
1397
1398     if (!(dc->flags & DC_SAVED))
1399     {
1400         dc->dwHookData = dwHookData;
1401         dc->hookProc = hookProc;
1402     }
1403     release_dc_ptr( dc );
1404     return TRUE;
1405 }
1406
1407
1408 /***********************************************************************
1409  *           GetDCHook   (GDI32.@)
1410  *
1411  * Note: this doesn't exist in Win32, we add it here because user32 needs it.
1412  */
1413 DWORD_PTR WINAPI GetDCHook( HDC hdc, DCHOOKPROC *proc )
1414 {
1415     DC *dc = get_dc_ptr( hdc );
1416     DWORD_PTR ret;
1417
1418     if (!dc) return 0;
1419     if (proc) *proc = dc->hookProc;
1420     ret = dc->dwHookData;
1421     release_dc_ptr( dc );
1422     return ret;
1423 }
1424
1425
1426 /***********************************************************************
1427  *           SetHookFlags   (GDI32.@)
1428  *
1429  * Note: this doesn't exist in Win32, we add it here because user32 needs it.
1430  */
1431 WORD WINAPI SetHookFlags( HDC hdc, WORD flags )
1432 {
1433     DC *dc = get_dc_obj( hdc );  /* not get_dc_ptr, this needs to work from any thread */
1434     LONG ret = 0;
1435
1436     if (!dc) return 0;
1437
1438     /* "Undocumented Windows" info is slightly confusing. */
1439
1440     TRACE("hDC %p, flags %04x\n",hdc,flags);
1441
1442     if (flags & DCHF_INVALIDATEVISRGN)
1443         ret = InterlockedExchange( &dc->dirty, 1 );
1444     else if (flags & DCHF_VALIDATEVISRGN || !flags)
1445         ret = InterlockedExchange( &dc->dirty, 0 );
1446
1447     GDI_ReleaseObj( dc );
1448     return ret;
1449 }
1450
1451 /***********************************************************************
1452  *           SetICMMode    (GDI32.@)
1453  */
1454 INT WINAPI SetICMMode(HDC hdc, INT iEnableICM)
1455 {
1456 /*FIXME:  Assume that ICM is always off, and cannot be turned on */
1457     if (iEnableICM == ICM_OFF) return ICM_OFF;
1458     if (iEnableICM == ICM_ON) return 0;
1459     if (iEnableICM == ICM_QUERY) return ICM_OFF;
1460     return 0;
1461 }
1462
1463 /***********************************************************************
1464  *           GetDeviceGammaRamp    (GDI32.@)
1465  */
1466 BOOL WINAPI GetDeviceGammaRamp(HDC hDC, LPVOID ptr)
1467 {
1468     BOOL ret = FALSE;
1469     DC *dc = get_dc_ptr( hDC );
1470
1471     if( dc )
1472     {
1473         if (dc->funcs->pGetDeviceGammaRamp)
1474             ret = dc->funcs->pGetDeviceGammaRamp(dc->physDev, ptr);
1475         release_dc_ptr( dc );
1476     }
1477     return ret;
1478 }
1479
1480 /***********************************************************************
1481  *           SetDeviceGammaRamp    (GDI32.@)
1482  */
1483 BOOL WINAPI SetDeviceGammaRamp(HDC hDC, LPVOID ptr)
1484 {
1485     BOOL ret = FALSE;
1486     DC *dc = get_dc_ptr( hDC );
1487
1488     if( dc )
1489     {
1490         if (dc->funcs->pSetDeviceGammaRamp)
1491             ret = dc->funcs->pSetDeviceGammaRamp(dc->physDev, ptr);
1492         release_dc_ptr( dc );
1493     }
1494     return ret;
1495 }
1496
1497 /***********************************************************************
1498  *           GetColorSpace    (GDI32.@)
1499  */
1500 HCOLORSPACE WINAPI GetColorSpace(HDC hdc)
1501 {
1502 /*FIXME    Need to to whatever GetColorSpace actually does */
1503     return 0;
1504 }
1505
1506 /***********************************************************************
1507  *           CreateColorSpaceA    (GDI32.@)
1508  */
1509 HCOLORSPACE WINAPI CreateColorSpaceA( LPLOGCOLORSPACEA lpLogColorSpace )
1510 {
1511   FIXME( "stub\n" );
1512   return 0;
1513 }
1514
1515 /***********************************************************************
1516  *           CreateColorSpaceW    (GDI32.@)
1517  */
1518 HCOLORSPACE WINAPI CreateColorSpaceW( LPLOGCOLORSPACEW lpLogColorSpace )
1519 {
1520   FIXME( "stub\n" );
1521   return 0;
1522 }
1523
1524 /***********************************************************************
1525  *           DeleteColorSpace     (GDI32.@)
1526  */
1527 BOOL WINAPI DeleteColorSpace( HCOLORSPACE hColorSpace )
1528 {
1529   FIXME( "stub\n" );
1530
1531   return TRUE;
1532 }
1533
1534 /***********************************************************************
1535  *           SetColorSpace     (GDI32.@)
1536  */
1537 HCOLORSPACE WINAPI SetColorSpace( HDC hDC, HCOLORSPACE hColorSpace )
1538 {
1539   FIXME( "stub\n" );
1540
1541   return hColorSpace;
1542 }
1543
1544 /***********************************************************************
1545  *           GetBoundsRect    (GDI32.@)
1546  */
1547 UINT WINAPI GetBoundsRect(HDC hdc, LPRECT rect, UINT flags)
1548 {
1549     UINT ret;
1550     DC *dc = get_dc_ptr( hdc );
1551
1552     if ( !dc ) return 0;
1553
1554     if (rect)
1555     {
1556         *rect = dc->BoundsRect;
1557         ret = ((dc->flags & DC_BOUNDS_SET) ? DCB_SET : DCB_RESET);
1558     }
1559     else
1560         ret = 0;
1561
1562     if (flags & DCB_RESET)
1563     {
1564         dc->BoundsRect.left   = 0;
1565         dc->BoundsRect.top    = 0;
1566         dc->BoundsRect.right  = 0;
1567         dc->BoundsRect.bottom = 0;
1568         dc->flags &= ~DC_BOUNDS_SET;
1569     }
1570     release_dc_ptr( dc );
1571     return ret;
1572 }
1573
1574
1575 /***********************************************************************
1576  *           SetBoundsRect    (GDI32.@)
1577  */
1578 UINT WINAPI SetBoundsRect(HDC hdc, const RECT* rect, UINT flags)
1579 {
1580     UINT ret;
1581     DC *dc;
1582
1583     if ((flags & DCB_ENABLE) && (flags & DCB_DISABLE)) return 0;
1584     if (!(dc = get_dc_ptr( hdc ))) return 0;
1585
1586     ret = ((dc->flags & DC_BOUNDS_ENABLE) ? DCB_ENABLE : DCB_DISABLE) |
1587           ((dc->flags & DC_BOUNDS_SET) ? DCB_SET : DCB_RESET);
1588
1589     if (flags & DCB_RESET)
1590     {
1591         dc->BoundsRect.left   = 0;
1592         dc->BoundsRect.top    = 0;
1593         dc->BoundsRect.right  = 0;
1594         dc->BoundsRect.bottom = 0;
1595         dc->flags &= ~DC_BOUNDS_SET;
1596     }
1597
1598     if ((flags & DCB_ACCUMULATE) && rect && rect->left < rect->right && rect->top < rect->bottom)
1599     {
1600         if (dc->flags & DC_BOUNDS_SET)
1601         {
1602             dc->BoundsRect.left   = min( dc->BoundsRect.left, rect->left );
1603             dc->BoundsRect.top    = min( dc->BoundsRect.top, rect->top );
1604             dc->BoundsRect.right  = max( dc->BoundsRect.right, rect->right );
1605             dc->BoundsRect.bottom = max( dc->BoundsRect.bottom, rect->bottom );
1606         }
1607         else
1608         {
1609             dc->BoundsRect = *rect;
1610             dc->flags |= DC_BOUNDS_SET;
1611         }
1612     }
1613
1614     if (flags & DCB_ENABLE) dc->flags |= DC_BOUNDS_ENABLE;
1615     if (flags & DCB_DISABLE) dc->flags &= ~DC_BOUNDS_ENABLE;
1616
1617     release_dc_ptr( dc );
1618     return ret;
1619 }
1620
1621
1622 /***********************************************************************
1623  *              GetRelAbs               (GDI32.@)
1624  */
1625 INT WINAPI GetRelAbs( HDC hdc, DWORD dwIgnore )
1626 {
1627     INT ret = 0;
1628     DC *dc = get_dc_ptr( hdc );
1629     if (dc)
1630     {
1631         ret = dc->relAbsMode;
1632         release_dc_ptr( dc );
1633     }
1634     return ret;
1635 }
1636
1637
1638
1639
1640 /***********************************************************************
1641  *              GetBkMode (GDI32.@)
1642  */
1643 INT WINAPI GetBkMode( HDC hdc )
1644 {
1645     INT ret = 0;
1646     DC * dc = get_dc_ptr( hdc );
1647     if (dc)
1648     {
1649         ret = dc->backgroundMode;
1650         release_dc_ptr( dc );
1651     }
1652     return ret;
1653 }
1654
1655
1656 /***********************************************************************
1657  *              SetBkMode (GDI32.@)
1658  */
1659 INT WINAPI SetBkMode( HDC hdc, INT mode )
1660 {
1661     INT ret;
1662     DC *dc;
1663     if ((mode <= 0) || (mode > BKMODE_LAST))
1664     {
1665         SetLastError(ERROR_INVALID_PARAMETER);
1666         return 0;
1667     }
1668     if (!(dc = get_dc_ptr( hdc ))) return 0;
1669
1670     ret = dc->backgroundMode;
1671     if (dc->funcs->pSetBkMode)
1672         if (!dc->funcs->pSetBkMode( dc->physDev, mode ))
1673             ret = 0;
1674     if (ret)
1675         dc->backgroundMode = mode;
1676     release_dc_ptr( dc );
1677     return ret;
1678 }
1679
1680
1681 /***********************************************************************
1682  *              GetROP2 (GDI32.@)
1683  */
1684 INT WINAPI GetROP2( HDC hdc )
1685 {
1686     INT ret = 0;
1687     DC * dc = get_dc_ptr( hdc );
1688     if (dc)
1689     {
1690         ret = dc->ROPmode;
1691         release_dc_ptr( dc );
1692     }
1693     return ret;
1694 }
1695
1696
1697 /***********************************************************************
1698  *              SetROP2 (GDI32.@)
1699  */
1700 INT WINAPI SetROP2( HDC hdc, INT mode )
1701 {
1702     INT ret;
1703     DC *dc;
1704     if ((mode < R2_BLACK) || (mode > R2_WHITE))
1705     {
1706         SetLastError(ERROR_INVALID_PARAMETER);
1707         return 0;
1708     }
1709     if (!(dc = get_dc_ptr( hdc ))) return 0;
1710     ret = dc->ROPmode;
1711     if (dc->funcs->pSetROP2)
1712         if (!dc->funcs->pSetROP2( dc->physDev, mode ))
1713             ret = 0;
1714     if (ret)
1715         dc->ROPmode = mode;
1716     release_dc_ptr( dc );
1717     return ret;
1718 }
1719
1720
1721 /***********************************************************************
1722  *              SetRelAbs (GDI32.@)
1723  */
1724 INT WINAPI SetRelAbs( HDC hdc, INT mode )
1725 {
1726     INT ret;
1727     DC *dc;
1728     if ((mode != ABSOLUTE) && (mode != RELATIVE))
1729     {
1730         SetLastError(ERROR_INVALID_PARAMETER);
1731         return 0;
1732     }
1733     if (!(dc = get_dc_ptr( hdc ))) return 0;
1734     if (dc->funcs->pSetRelAbs)
1735         ret = dc->funcs->pSetRelAbs( dc->physDev, mode );
1736     else
1737     {
1738         ret = dc->relAbsMode;
1739         dc->relAbsMode = mode;
1740     }
1741     release_dc_ptr( dc );
1742     return ret;
1743 }
1744
1745
1746 /***********************************************************************
1747  *              GetPolyFillMode (GDI32.@)
1748  */
1749 INT WINAPI GetPolyFillMode( HDC hdc )
1750 {
1751     INT ret = 0;
1752     DC * dc = get_dc_ptr( hdc );
1753     if (dc)
1754     {
1755         ret = dc->polyFillMode;
1756         release_dc_ptr( dc );
1757     }
1758     return ret;
1759 }
1760
1761
1762 /***********************************************************************
1763  *              SetPolyFillMode (GDI32.@)
1764  */
1765 INT WINAPI SetPolyFillMode( HDC hdc, INT mode )
1766 {
1767     INT ret;
1768     DC *dc;
1769     if ((mode <= 0) || (mode > POLYFILL_LAST))
1770     {
1771         SetLastError(ERROR_INVALID_PARAMETER);
1772         return 0;
1773     }
1774     if (!(dc = get_dc_ptr( hdc ))) return 0;
1775     ret = dc->polyFillMode;
1776     if (dc->funcs->pSetPolyFillMode)
1777         if (!dc->funcs->pSetPolyFillMode( dc->physDev, mode ))
1778             ret = 0;
1779     if (ret)
1780         dc->polyFillMode = mode;
1781     release_dc_ptr( dc );
1782     return ret;
1783 }
1784
1785
1786 /***********************************************************************
1787  *              GetStretchBltMode (GDI32.@)
1788  */
1789 INT WINAPI GetStretchBltMode( HDC hdc )
1790 {
1791     INT ret = 0;
1792     DC * dc = get_dc_ptr( hdc );
1793     if (dc)
1794     {
1795         ret = dc->stretchBltMode;
1796         release_dc_ptr( dc );
1797     }
1798     return ret;
1799 }
1800
1801
1802 /***********************************************************************
1803  *              SetStretchBltMode (GDI32.@)
1804  */
1805 INT WINAPI SetStretchBltMode( HDC hdc, INT mode )
1806 {
1807     INT ret;
1808     DC *dc;
1809     if ((mode <= 0) || (mode > MAXSTRETCHBLTMODE))
1810     {
1811         SetLastError(ERROR_INVALID_PARAMETER);
1812         return 0;
1813     }
1814     if (!(dc = get_dc_ptr( hdc ))) return 0;
1815     ret = dc->stretchBltMode;
1816     if (dc->funcs->pSetStretchBltMode)
1817         if (!dc->funcs->pSetStretchBltMode( dc->physDev, mode ))
1818             ret = 0;
1819     if (ret)
1820         dc->stretchBltMode = mode;
1821     release_dc_ptr( dc );
1822     return ret;
1823 }
1824
1825
1826 /***********************************************************************
1827  *              GetMapMode (GDI32.@)
1828  */
1829 INT WINAPI GetMapMode( HDC hdc )
1830 {
1831     INT ret = 0;
1832     DC * dc = get_dc_ptr( hdc );
1833     if (dc)
1834     {
1835         ret = dc->MapMode;
1836         release_dc_ptr( dc );
1837     }
1838     return ret;
1839 }
1840
1841
1842 /***********************************************************************
1843  *              GetBrushOrgEx (GDI32.@)
1844  */
1845 BOOL WINAPI GetBrushOrgEx( HDC hdc, LPPOINT pt )
1846 {
1847     DC * dc = get_dc_ptr( hdc );
1848     if (!dc) return FALSE;
1849     pt->x = dc->brushOrgX;
1850     pt->y = dc->brushOrgY;
1851     release_dc_ptr( dc );
1852     return TRUE;
1853 }
1854
1855
1856 /***********************************************************************
1857  *              GetCurrentPositionEx (GDI32.@)
1858  */
1859 BOOL WINAPI GetCurrentPositionEx( HDC hdc, LPPOINT pt )
1860 {
1861     DC * dc = get_dc_ptr( hdc );
1862     if (!dc) return FALSE;
1863     pt->x = dc->CursPosX;
1864     pt->y = dc->CursPosY;
1865     release_dc_ptr( dc );
1866     return TRUE;
1867 }
1868
1869
1870 /***********************************************************************
1871  *              GetViewportExtEx (GDI32.@)
1872  */
1873 BOOL WINAPI GetViewportExtEx( HDC hdc, LPSIZE size )
1874 {
1875     DC * dc = get_dc_ptr( hdc );
1876     if (!dc) return FALSE;
1877     size->cx = dc->vportExtX;
1878     size->cy = dc->vportExtY;
1879     release_dc_ptr( dc );
1880     return TRUE;
1881 }
1882
1883
1884 /***********************************************************************
1885  *              GetViewportOrgEx (GDI32.@)
1886  */
1887 BOOL WINAPI GetViewportOrgEx( HDC hdc, LPPOINT pt )
1888 {
1889     DC * dc = get_dc_ptr( hdc );
1890     if (!dc) return FALSE;
1891     pt->x = dc->vportOrgX;
1892     pt->y = dc->vportOrgY;
1893     release_dc_ptr( dc );
1894     return TRUE;
1895 }
1896
1897
1898 /***********************************************************************
1899  *              GetWindowExtEx (GDI32.@)
1900  */
1901 BOOL WINAPI GetWindowExtEx( HDC hdc, LPSIZE size )
1902 {
1903     DC * dc = get_dc_ptr( hdc );
1904     if (!dc) return FALSE;
1905     size->cx = dc->wndExtX;
1906     size->cy = dc->wndExtY;
1907     release_dc_ptr( dc );
1908     return TRUE;
1909 }
1910
1911
1912 /***********************************************************************
1913  *              GetWindowOrgEx (GDI32.@)
1914  */
1915 BOOL WINAPI GetWindowOrgEx( HDC hdc, LPPOINT pt )
1916 {
1917     DC * dc = get_dc_ptr( hdc );
1918     if (!dc) return FALSE;
1919     pt->x = dc->wndOrgX;
1920     pt->y = dc->wndOrgY;
1921     release_dc_ptr( dc );
1922     return TRUE;
1923 }
1924
1925
1926 /***********************************************************************
1927  *           GetLayout    (GDI32.@)
1928  *
1929  * Gets left->right or right->left text layout flags of a dc.
1930  *
1931  */
1932 DWORD WINAPI GetLayout(HDC hdc)
1933 {
1934     DWORD layout = GDI_ERROR;
1935
1936     DC * dc = get_dc_ptr( hdc );
1937     if (dc)
1938     {
1939         layout = dc->layout;
1940         release_dc_ptr( dc );
1941     }
1942
1943     TRACE("hdc : %p, layout : %08x\n", hdc, layout);
1944
1945     return layout;
1946 }
1947
1948 /***********************************************************************
1949  *           SetLayout    (GDI32.@)
1950  *
1951  * Sets left->right or right->left text layout flags of a dc.
1952  *
1953  */
1954 DWORD WINAPI SetLayout(HDC hdc, DWORD layout)
1955 {
1956     DWORD oldlayout = GDI_ERROR;
1957
1958     DC * dc = get_dc_ptr( hdc );
1959     if (dc)
1960     {
1961         oldlayout = dc->layout;
1962         dc->layout = layout;
1963         if (layout != oldlayout)
1964         {
1965             if (layout & LAYOUT_RTL) dc->MapMode = MM_ANISOTROPIC;
1966             DC_UpdateXforms( dc );
1967         }
1968         release_dc_ptr( dc );
1969     }
1970
1971     TRACE("hdc : %p, old layout : %08x, new layout : %08x\n", hdc, oldlayout, layout);
1972
1973     return oldlayout;
1974 }
1975
1976 /***********************************************************************
1977  *           GetDCBrushColor    (GDI32.@)
1978  *
1979  * Retrieves the current brush color for the specified device
1980  * context (DC).
1981  *
1982  */
1983 COLORREF WINAPI GetDCBrushColor(HDC hdc)
1984 {
1985     DC *dc;
1986     COLORREF dcBrushColor = CLR_INVALID;
1987
1988     TRACE("hdc(%p)\n", hdc);
1989
1990     dc = get_dc_ptr( hdc );
1991     if (dc)
1992     {
1993         dcBrushColor = dc->dcBrushColor;
1994         release_dc_ptr( dc );
1995     }
1996
1997     return dcBrushColor;
1998 }
1999
2000 /***********************************************************************
2001  *           SetDCBrushColor    (GDI32.@)
2002  *
2003  * Sets the current device context (DC) brush color to the specified
2004  * color value. If the device cannot represent the specified color
2005  * value, the color is set to the nearest physical color.
2006  *
2007  */
2008 COLORREF WINAPI SetDCBrushColor(HDC hdc, COLORREF crColor)
2009 {
2010     DC *dc;
2011     COLORREF oldClr = CLR_INVALID;
2012
2013     TRACE("hdc(%p) crColor(%08x)\n", hdc, crColor);
2014
2015     dc = get_dc_ptr( hdc );
2016     if (dc)
2017     {
2018         if (dc->funcs->pSetDCBrushColor)
2019             crColor = dc->funcs->pSetDCBrushColor( dc->physDev, crColor );
2020         else if (dc->hBrush == GetStockObject( DC_BRUSH ))
2021         {
2022             /* If DC_BRUSH is selected, update driver pen color */
2023             HBRUSH hBrush = CreateSolidBrush( crColor );
2024             dc->funcs->pSelectBrush( dc->physDev, hBrush );
2025             DeleteObject( hBrush );
2026         }
2027
2028         if (crColor != CLR_INVALID)
2029         {
2030             oldClr = dc->dcBrushColor;
2031             dc->dcBrushColor = crColor;
2032         }
2033
2034         release_dc_ptr( dc );
2035     }
2036
2037     return oldClr;
2038 }
2039
2040 /***********************************************************************
2041  *           GetDCPenColor    (GDI32.@)
2042  *
2043  * Retrieves the current pen color for the specified device
2044  * context (DC).
2045  *
2046  */
2047 COLORREF WINAPI GetDCPenColor(HDC hdc)
2048 {
2049     DC *dc;
2050     COLORREF dcPenColor = CLR_INVALID;
2051
2052     TRACE("hdc(%p)\n", hdc);
2053
2054     dc = get_dc_ptr( hdc );
2055     if (dc)
2056     {
2057         dcPenColor = dc->dcPenColor;
2058         release_dc_ptr( dc );
2059     }
2060
2061     return dcPenColor;
2062 }
2063
2064 /***********************************************************************
2065  *           SetDCPenColor    (GDI32.@)
2066  *
2067  * Sets the current device context (DC) pen color to the specified
2068  * color value. If the device cannot represent the specified color
2069  * value, the color is set to the nearest physical color.
2070  *
2071  */
2072 COLORREF WINAPI SetDCPenColor(HDC hdc, COLORREF crColor)
2073 {
2074     DC *dc;
2075     COLORREF oldClr = CLR_INVALID;
2076
2077     TRACE("hdc(%p) crColor(%08x)\n", hdc, crColor);
2078
2079     dc = get_dc_ptr( hdc );
2080     if (dc)
2081     {
2082         if (dc->funcs->pSetDCPenColor)
2083             crColor = dc->funcs->pSetDCPenColor( dc->physDev, crColor );
2084         else if (dc->hPen == GetStockObject( DC_PEN ))
2085         {
2086             /* If DC_PEN is selected, update the driver pen color */
2087             LOGPEN logpen = { PS_SOLID, { 0, 0 }, crColor };
2088             HPEN hPen = CreatePenIndirect( &logpen );
2089             dc->funcs->pSelectPen( dc->physDev, hPen );
2090             DeleteObject( hPen );
2091         }
2092
2093         if (crColor != CLR_INVALID)
2094         {
2095             oldClr = dc->dcPenColor;
2096             dc->dcPenColor = crColor;
2097         }
2098
2099         release_dc_ptr( dc );
2100     }
2101
2102     return oldClr;
2103 }
2104
2105 /***********************************************************************
2106  *           CancelDC    (GDI32.@)
2107  */
2108 BOOL WINAPI CancelDC(HDC hdc)
2109 {
2110     FIXME("stub\n");
2111     return TRUE;
2112 }
2113
2114 /*******************************************************************
2115  *      GetMiterLimit [GDI32.@]
2116  *
2117  *
2118  */
2119 BOOL WINAPI GetMiterLimit(HDC hdc, PFLOAT peLimit)
2120 {
2121     BOOL bRet = FALSE;
2122     DC *dc;
2123
2124     TRACE("(%p,%p)\n", hdc, peLimit);
2125
2126     dc = get_dc_ptr( hdc );
2127     if (dc)
2128     {
2129         if (peLimit)
2130             *peLimit = dc->miterLimit;
2131
2132         release_dc_ptr( dc );
2133         bRet = TRUE;
2134     }
2135     return bRet;
2136 }
2137
2138 /*******************************************************************
2139  *      SetMiterLimit [GDI32.@]
2140  *
2141  *
2142  */
2143 BOOL WINAPI SetMiterLimit(HDC hdc, FLOAT eNewLimit, PFLOAT peOldLimit)
2144 {
2145     BOOL bRet = FALSE;
2146     DC *dc;
2147
2148     TRACE("(%p,%f,%p)\n", hdc, eNewLimit, peOldLimit);
2149
2150     dc = get_dc_ptr( hdc );
2151     if (dc)
2152     {
2153         if (peOldLimit)
2154             *peOldLimit = dc->miterLimit;
2155         dc->miterLimit = eNewLimit;
2156         release_dc_ptr( dc );
2157         bRet = TRUE;
2158     }
2159     return bRet;
2160 }
2161
2162 /*******************************************************************
2163  *      GdiIsMetaPrintDC [GDI32.@]
2164  */
2165 BOOL WINAPI GdiIsMetaPrintDC(HDC hdc)
2166 {
2167     FIXME("%p\n", hdc);
2168     return FALSE;
2169 }
2170
2171 /*******************************************************************
2172  *      GdiIsMetaFileDC [GDI32.@]
2173  */
2174 BOOL WINAPI GdiIsMetaFileDC(HDC hdc)
2175 {
2176     TRACE("%p\n", hdc);
2177
2178     switch( GetObjectType( hdc ) )
2179     {
2180     case OBJ_METADC:
2181     case OBJ_ENHMETADC:
2182         return TRUE;
2183     }
2184     return FALSE;
2185 }
2186
2187 /*******************************************************************
2188  *      GdiIsPlayMetafileDC [GDI32.@]
2189  */
2190 BOOL WINAPI GdiIsPlayMetafileDC(HDC hdc)
2191 {
2192     FIXME("%p\n", hdc);
2193     return FALSE;
2194 }