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 "gdi_private.h"
  34 #include "wine/unicode.h"
  35 #include "wine/debug.h"
  36
  37 WINE_DEFAULT_DEBUG_CHANNEL(dc);
  38
  39 static const WCHAR displayW[] = { 'd','i','s','p','l','a','y',0 };
  40
  41 static BOOL DC_DeleteObject( HGDIOBJ handle );
  42
  43 static const struct gdi_obj_funcs dc_funcs =
  44 {
  45     NULL,             /* pSelectObject */
  46     NULL,             /* pGetObjectA */
  47     NULL,             /* pGetObjectW */
  48     NULL,             /* pUnrealizeObject */
  49     DC_DeleteObject   /* pDeleteObject */
  50 };
  51
  52
  53 static inline DC *get_dc_obj( HDC hdc )
  54 {
  55     DC *dc = GDI_GetObjPtr( hdc, 0 );
  56     if (!dc) return NULL;
  57
  58     switch (GetObjectType( hdc ))
  59     {
  60     case OBJ_DC:
  61     case OBJ_MEMDC:
  62     case OBJ_METADC:
  63     case OBJ_ENHMETADC:
  64         return dc;
  65     default:
  66         GDI_ReleaseObj( hdc );
  67         SetLastError( ERROR_INVALID_HANDLE );
  68         return NULL;
  69     }
  70 }
  71
  72
  73 /***********************************************************************
  74  *           set_initial_dc_state
  75  */
  76 static void set_initial_dc_state( DC *dc )
  77 {
  78     dc->wndOrgX             = 0;
  79     dc->wndOrgY             = 0;
  80     dc->wndExtX             = 1;
  81     dc->wndExtY             = 1;
  82     dc->vportOrgX           = 0;
  83     dc->vportOrgY           = 0;
  84     dc->vportExtX           = 1;
  85     dc->vportExtY           = 1;
  86     dc->miterLimit          = 10.0f; /* 10.0 is the default, from MSDN */
  87     dc->layout              = 0;
  88     dc->font_code_page      = CP_ACP;
  89     dc->ROPmode             = R2_COPYPEN;
  90     dc->polyFillMode        = ALTERNATE;
  91     dc->stretchBltMode      = BLACKONWHITE;
  92     dc->relAbsMode          = ABSOLUTE;
  93     dc->backgroundMode      = OPAQUE;
  94     dc->backgroundColor     = RGB( 255, 255, 255 );
  95     dc->dcBrushColor        = RGB( 255, 255, 255 );
  96     dc->dcPenColor          = RGB( 0, 0, 0 );
  97     dc->textColor           = RGB( 0, 0, 0 );
  98     dc->brushOrgX           = 0;
  99     dc->brushOrgY           = 0;
 100     dc->mapperFlags         = 0;
 101     dc->textAlign           = TA_LEFT | TA_TOP | TA_NOUPDATECP;
 102     dc->charExtra           = 0;
 103     dc->breakExtra          = 0;
 104     dc->breakRem            = 0;
 105     dc->MapMode             = MM_TEXT;
 106     dc->GraphicsMode        = GM_COMPATIBLE;
 107     dc->CursPosX            = 0;
 108     dc->CursPosY            = 0;
 109     dc->ArcDirection        = AD_COUNTERCLOCKWISE;
 110     dc->xformWorld2Wnd.eM11 = 1.0f;
 111     dc->xformWorld2Wnd.eM12 = 0.0f;
 112     dc->xformWorld2Wnd.eM21 = 0.0f;
 113     dc->xformWorld2Wnd.eM22 = 1.0f;
 114     dc->xformWorld2Wnd.eDx  = 0.0f;
 115     dc->xformWorld2Wnd.eDy  = 0.0f;
 116     dc->xformWorld2Vport    = dc->xformWorld2Wnd;
 117     dc->xformVport2World    = dc->xformWorld2Wnd;
 118     dc->vport2WorldValid    = TRUE;
 119
 120     reset_bounds( &dc->bounds );
 121 }
 122
 123 /***********************************************************************
 124  *           alloc_dc_ptr
 125  */
 126 DC *alloc_dc_ptr( WORD magic )
 127 {
 128     DC *dc;
 129
 130     if (!(dc = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*dc) ))) return NULL;
 131
 132     dc->nulldrv.funcs       = &null_driver;
 133     dc->physDev             = &dc->nulldrv;
 134     dc->module              = gdi32_module;
 135     dc->thread              = GetCurrentThreadId();
 136     dc->refcount            = 1;
 137     dc->hPen                = GDI_inc_ref_count( GetStockObject( BLACK_PEN ));
 138     dc->hBrush              = GDI_inc_ref_count( GetStockObject( WHITE_BRUSH ));
 139     dc->hFont               = GDI_inc_ref_count( GetStockObject( SYSTEM_FONT ));
 140     dc->hPalette            = GetStockObject( DEFAULT_PALETTE );
 141
 142     set_initial_dc_state( dc );
 143
 144     if (!(dc->hSelf = alloc_gdi_handle( dc, magic, &dc_funcs )))
 145     {
 146         HeapFree( GetProcessHeap(), 0, dc );
 147         return NULL;
 148     }
 149     dc->nulldrv.hdc = dc->hSelf;
 150
 151     if (font_driver && !font_driver->pCreateDC( &dc->physDev, NULL, NULL, NULL, NULL ))
 152     {
 153         free_dc_ptr( dc );
 154         return NULL;
 155     }
 156     return dc;
 157 }
 158
 159
 160
 161 /***********************************************************************
 162  *           free_dc_state
 163  */
 164 static void free_dc_state( DC *dc )
 165 {
 166     if (dc->hClipRgn) DeleteObject( dc->hClipRgn );
 167     if (dc->hMetaRgn) DeleteObject( dc->hMetaRgn );
 168     if (dc->hVisRgn) DeleteObject( dc->hVisRgn );
 169     if (dc->region) DeleteObject( dc->region );
 170     if (dc->path) free_gdi_path( dc->path );
 171     HeapFree( GetProcessHeap(), 0, dc );
 172 }
 173
 174
 175 /***********************************************************************
 176  *           free_dc_ptr
 177  */
 178 void free_dc_ptr( DC *dc )
 179 {
 180     assert( dc->refcount == 1 );
 181
 182     while (dc->physDev != &dc->nulldrv)
 183     {
 184         PHYSDEV physdev = dc->physDev;
 185         dc->physDev = physdev->next;
 186         physdev->funcs->pDeleteDC( physdev );
 187     }
 188     GDI_dec_ref_count( dc->hPen );
 189     GDI_dec_ref_count( dc->hBrush );
 190     GDI_dec_ref_count( dc->hFont );
 191     if (dc->hBitmap) GDI_dec_ref_count( dc->hBitmap );
 192     free_gdi_handle( dc->hSelf );
 193     free_dc_state( dc );
 194 }
 195
 196
 197 /***********************************************************************
 198  *           get_dc_ptr
 199  *
 200  * Retrieve a DC pointer but release the GDI lock.
 201  */
 202 DC *get_dc_ptr( HDC hdc )
 203 {
 204     DC *dc = get_dc_obj( hdc );
 205     if (!dc) return NULL;
 206
 207     if (!InterlockedCompareExchange( &dc->refcount, 1, 0 ))
 208     {
 209         dc->thread = GetCurrentThreadId();
 210     }
 211     else if (dc->thread != GetCurrentThreadId())
 212     {
 213         WARN( "dc %p belongs to thread %04x\n", hdc, dc->thread );
 214         GDI_ReleaseObj( hdc );
 215         return NULL;
 216     }
 217     else InterlockedIncrement( &dc->refcount );
 218
 219     GDI_ReleaseObj( hdc );
 220     return dc;
 221 }
 222
 223
 224 /***********************************************************************
 225  *           release_dc_ptr
 226  */
 227 void release_dc_ptr( DC *dc )
 228 {
 229     LONG ref;
 230
 231     dc->thread = 0;
 232     ref = InterlockedDecrement( &dc->refcount );
 233     assert( ref >= 0 );
 234     if (ref) dc->thread = GetCurrentThreadId();  /* we still own it */
 235 }
 236
 237
 238 /***********************************************************************
 239  *           update_dc
 240  *
 241  * Make sure the DC vis region is up to date.
 242  * This function may call up to USER so the GDI lock should _not_
 243  * be held when calling it.
 244  */
 245 void update_dc( DC *dc )
 246 {
 247     if (InterlockedExchange( &dc->dirty, 0 ) && dc->hookProc)
 248         dc->hookProc( dc->hSelf, DCHC_INVALIDVISRGN, dc->dwHookData, 0 );
 249 }
 250
 251
 252 /***********************************************************************
 253  *           DC_DeleteObject
 254  */
 255 static BOOL DC_DeleteObject( HGDIOBJ handle )
 256 {
 257     return DeleteDC( handle );
 258 }
 259
 260
 261 /***********************************************************************
 262  *           DC_InitDC
 263  *
 264  * Setup device-specific DC values for a newly created DC.
 265  */
 266 void DC_InitDC( DC* dc )
 267 {
 268     PHYSDEV physdev = GET_DC_PHYSDEV( dc, pRealizeDefaultPalette );
 269     physdev->funcs->pRealizeDefaultPalette( physdev );
 270     SetTextColor( dc->hSelf, dc->textColor );
 271     SetBkColor( dc->hSelf, dc->backgroundColor );
 272     SelectObject( dc->hSelf, dc->hPen );
 273     SelectObject( dc->hSelf, dc->hBrush );
 274     SelectObject( dc->hSelf, dc->hFont );
 275     update_dc_clipping( dc );
 276     SetVirtualResolution( dc->hSelf, 0, 0, 0, 0 );
 277     physdev = GET_DC_PHYSDEV( dc, pSetBoundsRect );
 278     physdev->funcs->pSetBoundsRect( physdev, &dc->bounds, dc->bounds_enabled ? DCB_ENABLE : DCB_DISABLE );
 279 }
 280
 281
 282 /***********************************************************************
 283  *           DC_InvertXform
 284  *
 285  * Computes the inverse of the transformation xformSrc and stores it to
 286  * xformDest. Returns TRUE if successful or FALSE if the xformSrc matrix
 287  * is singular.
 288  */
 289 static BOOL DC_InvertXform( const XFORM *xformSrc, XFORM *xformDest )
 290 {
 291     double determinant;
 292
 293     determinant = xformSrc->eM11*xformSrc->eM22 -
 294         xformSrc->eM12*xformSrc->eM21;
 295     if (determinant > -1e-12 && determinant < 1e-12)
 296         return FALSE;
 297
 298     xformDest->eM11 =  xformSrc->eM22 / determinant;
 299     xformDest->eM12 = -xformSrc->eM12 / determinant;
 300     xformDest->eM21 = -xformSrc->eM21 / determinant;
 301     xformDest->eM22 =  xformSrc->eM11 / determinant;
 302     xformDest->eDx  = -xformSrc->eDx * xformDest->eM11 -
 303                        xformSrc->eDy * xformDest->eM21;
 304     xformDest->eDy  = -xformSrc->eDx * xformDest->eM12 -
 305                        xformSrc->eDy * xformDest->eM22;
 306
 307     return TRUE;
 308 }
 309
 310 /* Construct a transformation to do the window-to-viewport conversion */
 311 static void construct_window_to_viewport(DC *dc, XFORM *xform)
 312 {
 313     double scaleX, scaleY;
 314     scaleX = (double)dc->vportExtX / (double)dc->wndExtX;
 315     scaleY = (double)dc->vportExtY / (double)dc->wndExtY;
 316
 317     if (dc->layout & LAYOUT_RTL) scaleX = -scaleX;
 318     xform->eM11 = scaleX;
 319     xform->eM12 = 0.0;
 320     xform->eM21 = 0.0;
 321     xform->eM22 = scaleY;
 322     xform->eDx  = (double)dc->vportOrgX - scaleX * (double)dc->wndOrgX;
 323     xform->eDy  = (double)dc->vportOrgY - scaleY * (double)dc->wndOrgY;
 324     if (dc->layout & LAYOUT_RTL) xform->eDx = dc->vis_rect.right - dc->vis_rect.left - 1 - xform->eDx;
 325 }
 326
 327 /***********************************************************************
 328  *           DC_UpdateXforms
 329  *
 330  * Updates the xformWorld2Vport, xformVport2World and vport2WorldValid
 331  * fields of the specified DC by creating a transformation that
 332  * represents the current mapping mode and combining it with the DC's
 333  * world transform. This function should be called whenever the
 334  * parameters associated with the mapping mode (window and viewport
 335  * extents and origins) or the world transform change.
 336  */
 337 void DC_UpdateXforms( DC *dc )
 338 {
 339     XFORM xformWnd2Vport, oldworld2vport;
 340
 341     construct_window_to_viewport(dc, &xformWnd2Vport);
 342
 343     oldworld2vport = dc->xformWorld2Vport;
 344     /* Combine with the world transformation */
 345     CombineTransform( &dc->xformWorld2Vport, &dc->xformWorld2Wnd,
 346         &xformWnd2Vport );
 347
 348     /* Create inverse of world-to-viewport transformation */
 349     dc->vport2WorldValid = DC_InvertXform( &dc->xformWorld2Vport,
 350         &dc->xformVport2World );
 351
 352     /* Reselect the font and pen back into the dc so that the size
 353        gets updated. */
 354     if (memcmp(&oldworld2vport, &dc->xformWorld2Vport, sizeof(oldworld2vport)) &&
 355         !GdiIsMetaFileDC(dc->hSelf))
 356     {
 357         SelectObject(dc->hSelf, GetCurrentObject(dc->hSelf, OBJ_FONT));
 358         SelectObject(dc->hSelf, GetCurrentObject(dc->hSelf, OBJ_PEN));
 359     }
 360 }
 361
 362
 363 /***********************************************************************
 364  *           nulldrv_SaveDC
 365  */
 366 INT nulldrv_SaveDC( PHYSDEV dev )
 367 {
 368     DC *newdc, *dc = get_nulldrv_dc( dev );
 369
 370     if (!(newdc = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*newdc )))) return 0;
 371     newdc->layout           = dc->layout;
 372     newdc->hPen             = dc->hPen;
 373     newdc->hBrush           = dc->hBrush;
 374     newdc->hFont            = dc->hFont;
 375     newdc->hBitmap          = dc->hBitmap;
 376     newdc->hPalette         = dc->hPalette;
 377     newdc->ROPmode          = dc->ROPmode;
 378     newdc->polyFillMode     = dc->polyFillMode;
 379     newdc->stretchBltMode   = dc->stretchBltMode;
 380     newdc->relAbsMode       = dc->relAbsMode;
 381     newdc->backgroundMode   = dc->backgroundMode;
 382     newdc->backgroundColor  = dc->backgroundColor;
 383     newdc->textColor        = dc->textColor;
 384     newdc->dcBrushColor     = dc->dcBrushColor;
 385     newdc->dcPenColor       = dc->dcPenColor;
 386     newdc->brushOrgX        = dc->brushOrgX;
 387     newdc->brushOrgY        = dc->brushOrgY;
 388     newdc->mapperFlags      = dc->mapperFlags;
 389     newdc->textAlign        = dc->textAlign;
 390     newdc->charExtra        = dc->charExtra;
 391     newdc->breakExtra       = dc->breakExtra;
 392     newdc->breakRem         = dc->breakRem;
 393     newdc->MapMode          = dc->MapMode;
 394     newdc->GraphicsMode     = dc->GraphicsMode;
 395     newdc->CursPosX         = dc->CursPosX;
 396     newdc->CursPosY         = dc->CursPosY;
 397     newdc->ArcDirection     = dc->ArcDirection;
 398     newdc->xformWorld2Wnd   = dc->xformWorld2Wnd;
 399     newdc->xformWorld2Vport = dc->xformWorld2Vport;
 400     newdc->xformVport2World = dc->xformVport2World;
 401     newdc->vport2WorldValid = dc->vport2WorldValid;
 402     newdc->wndOrgX          = dc->wndOrgX;
 403     newdc->wndOrgY          = dc->wndOrgY;
 404     newdc->wndExtX          = dc->wndExtX;
 405     newdc->wndExtY          = dc->wndExtY;
 406     newdc->vportOrgX        = dc->vportOrgX;
 407     newdc->vportOrgY        = dc->vportOrgY;
 408     newdc->vportExtX        = dc->vportExtX;
 409     newdc->vportExtY        = dc->vportExtY;
 410     newdc->virtual_res      = dc->virtual_res;
 411     newdc->virtual_size     = dc->virtual_size;
 412
 413     /* Get/SetDCState() don't change hVisRgn field ("Undoc. Windows" p.559). */
 414
 415     if (dc->hClipRgn)
 416     {
 417         newdc->hClipRgn = CreateRectRgn( 0, 0, 0, 0 );
 418         CombineRgn( newdc->hClipRgn, dc->hClipRgn, 0, RGN_COPY );
 419     }
 420     if (dc->hMetaRgn)
 421     {
 422         newdc->hMetaRgn = CreateRectRgn( 0, 0, 0, 0 );
 423         CombineRgn( newdc->hMetaRgn, dc->hMetaRgn, 0, RGN_COPY );
 424     }
 425
 426     if (!PATH_SavePath( newdc, dc ))
 427     {
 428         release_dc_ptr( dc );
 429         free_dc_state( newdc );
 430         return 0;
 431     }
 432
 433     newdc->saved_dc = dc->saved_dc;
 434     dc->saved_dc = newdc;
 435     return ++dc->saveLevel;
 436 }
 437
 438
 439 /***********************************************************************
 440  *           nulldrv_RestoreDC
 441  */
 442 BOOL nulldrv_RestoreDC( PHYSDEV dev, INT level )
 443 {
 444     DC *dcs, *first_dcs, *dc = get_nulldrv_dc( dev );
 445     INT save_level;
 446
 447     /* find the state level to restore */
 448
 449     if (abs(level) > dc->saveLevel || level == 0) return FALSE;
 450     if (level < 0) level = dc->saveLevel + level + 1;
 451     first_dcs = dc->saved_dc;
 452     for (dcs = first_dcs, save_level = dc->saveLevel; save_level > level; save_level--)
 453         dcs = dcs->saved_dc;
 454
 455     /* restore the state */
 456
 457     if (!PATH_RestorePath( dc, dcs )) return FALSE;
 458
 459     dc->layout           = dcs->layout;
 460     dc->ROPmode          = dcs->ROPmode;
 461     dc->polyFillMode     = dcs->polyFillMode;
 462     dc->stretchBltMode   = dcs->stretchBltMode;
 463     dc->relAbsMode       = dcs->relAbsMode;
 464     dc->backgroundMode   = dcs->backgroundMode;
 465     dc->backgroundColor  = dcs->backgroundColor;
 466     dc->textColor        = dcs->textColor;
 467     dc->dcBrushColor     = dcs->dcBrushColor;
 468     dc->dcPenColor       = dcs->dcPenColor;
 469     dc->brushOrgX        = dcs->brushOrgX;
 470     dc->brushOrgY        = dcs->brushOrgY;
 471     dc->mapperFlags      = dcs->mapperFlags;
 472     dc->textAlign        = dcs->textAlign;
 473     dc->charExtra        = dcs->charExtra;
 474     dc->breakExtra       = dcs->breakExtra;
 475     dc->breakRem         = dcs->breakRem;
 476     dc->MapMode          = dcs->MapMode;
 477     dc->GraphicsMode     = dcs->GraphicsMode;
 478     dc->CursPosX         = dcs->CursPosX;
 479     dc->CursPosY         = dcs->CursPosY;
 480     dc->ArcDirection     = dcs->ArcDirection;
 481     dc->xformWorld2Wnd   = dcs->xformWorld2Wnd;
 482     dc->xformWorld2Vport = dcs->xformWorld2Vport;
 483     dc->xformVport2World = dcs->xformVport2World;
 484     dc->vport2WorldValid = dcs->vport2WorldValid;
 485     dc->wndOrgX          = dcs->wndOrgX;
 486     dc->wndOrgY          = dcs->wndOrgY;
 487     dc->wndExtX          = dcs->wndExtX;
 488     dc->wndExtY          = dcs->wndExtY;
 489     dc->vportOrgX        = dcs->vportOrgX;
 490     dc->vportOrgY        = dcs->vportOrgY;
 491     dc->vportExtX        = dcs->vportExtX;
 492     dc->vportExtY        = dcs->vportExtY;
 493     dc->virtual_res      = dcs->virtual_res;
 494     dc->virtual_size     = dcs->virtual_size;
 495
 496     if (dcs->hClipRgn)
 497     {
 498         if (!dc->hClipRgn) dc->hClipRgn = CreateRectRgn( 0, 0, 0, 0 );
 499         CombineRgn( dc->hClipRgn, dcs->hClipRgn, 0, RGN_COPY );
 500     }
 501     else
 502     {
 503         if (dc->hClipRgn) DeleteObject( dc->hClipRgn );
 504         dc->hClipRgn = 0;
 505     }
 506     if (dcs->hMetaRgn)
 507     {
 508         if (!dc->hMetaRgn) dc->hMetaRgn = CreateRectRgn( 0, 0, 0, 0 );
 509         CombineRgn( dc->hMetaRgn, dcs->hMetaRgn, 0, RGN_COPY );
 510     }
 511     else
 512     {
 513         if (dc->hMetaRgn) DeleteObject( dc->hMetaRgn );
 514         dc->hMetaRgn = 0;
 515     }
 516     DC_UpdateXforms( dc );
 517     update_dc_clipping( dc );
 518
 519     SelectObject( dev->hdc, dcs->hBitmap );
 520     SelectObject( dev->hdc, dcs->hBrush );
 521     SelectObject( dev->hdc, dcs->hFont );
 522     SelectObject( dev->hdc, dcs->hPen );
 523     SetBkColor( dev->hdc, dcs->backgroundColor);
 524     SetTextColor( dev->hdc, dcs->textColor);
 525     GDISelectPalette( dev->hdc, dcs->hPalette, FALSE );
 526
 527     dc->saved_dc  = dcs->saved_dc;
 528     dcs->saved_dc = 0;
 529     dc->saveLevel = save_level - 1;
 530
 531     /* now destroy all the saved DCs */
 532
 533     while (first_dcs)
 534     {
 535         DC *next = first_dcs->saved_dc;
 536         free_dc_state( first_dcs );
 537         first_dcs = next;
 538     }
 539     return TRUE;
 540 }
 541
 542
 543 /***********************************************************************
 544  *           reset_dc_state
 545  */
 546 static BOOL reset_dc_state( HDC hdc )
 547 {
 548     DC *dc, *dcs, *next;
 549
 550     if (!(dc = get_dc_ptr( hdc ))) return FALSE;
 551
 552     set_initial_dc_state( dc );
 553     SetBkColor( hdc, RGB( 255, 255, 255 ));
 554     SetTextColor( hdc, RGB( 0, 0, 0 ));
 555     SelectObject( hdc, GetStockObject( WHITE_BRUSH ));
 556     SelectObject( hdc, GetStockObject( SYSTEM_FONT ));
 557     SelectObject( hdc, GetStockObject( BLACK_PEN ));
 558     SetVirtualResolution( hdc, 0, 0, 0, 0 );
 559     GDISelectPalette( hdc, GetStockObject( DEFAULT_PALETTE ), FALSE );
 560     SetBoundsRect( hdc, NULL, DCB_DISABLE );
 561     AbortPath( hdc );
 562
 563     if (dc->hClipRgn) DeleteObject( dc->hClipRgn );
 564     if (dc->hMetaRgn) DeleteObject( dc->hMetaRgn );
 565     dc->hClipRgn = 0;
 566     dc->hMetaRgn = 0;
 567     update_dc_clipping( dc );
 568
 569     for (dcs = dc->saved_dc; dcs; dcs = next)
 570     {
 571         next = dcs->saved_dc;
 572         free_dc_state( dcs );
 573     }
 574     dc->saved_dc = NULL;
 575     dc->saveLevel = 0;
 576     release_dc_ptr( dc );
 577     return TRUE;
 578 }
 579
 580
 581 /***********************************************************************
 582  *           SaveDC    (GDI32.@)
 583  */
 584 INT WINAPI SaveDC( HDC hdc )
 585 {
 586     DC * dc;
 587     INT ret = 0;
 588
 589     if ((dc = get_dc_ptr( hdc )))
 590     {
 591         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSaveDC );
 592         ret = physdev->funcs->pSaveDC( physdev );
 593         release_dc_ptr( dc );
 594     }
 595     return ret;
 596 }
 597
 598
 599 /***********************************************************************
 600  *           RestoreDC    (GDI32.@)
 601  */
 602 BOOL WINAPI RestoreDC( HDC hdc, INT level )
 603 {
 604     PHYSDEV physdev;
 605     DC *dc;
 606     BOOL success = FALSE;
 607
 608     TRACE("%p %d\n", hdc, level );
 609     if ((dc = get_dc_ptr( hdc )))
 610     {
 611         update_dc( dc );
 612         physdev = GET_DC_PHYSDEV( dc, pRestoreDC );
 613         success = physdev->funcs->pRestoreDC( physdev, level );
 614         release_dc_ptr( dc );
 615     }
 616     return success;
 617 }
 618
 619
 620 /***********************************************************************
 621  *           CreateDCW    (GDI32.@)
 622  */
 623 HDC WINAPI CreateDCW( LPCWSTR driver, LPCWSTR device, LPCWSTR output,
 624                       const DEVMODEW *initData )
 625 {
 626     HDC hdc;
 627     DC * dc;
 628     const struct gdi_dc_funcs *funcs;
 629     HMODULE module;
 630     WCHAR buf[300];
 631
 632     GDI_CheckNotLock();
 633
 634     if (!device || !DRIVER_GetDriverName( device, buf, 300 ))
 635     {
 636         if (!driver)
 637         {
 638             ERR( "no device found for %s\n", debugstr_w(device) );
 639             return 0;
 640         }
 641         strcpyW(buf, driver);
 642     }
 643
 644     if (!(funcs = DRIVER_load_driver( buf, &module )))
 645     {
 646         ERR( "no driver found for %s\n", debugstr_w(buf) );
 647         return 0;
 648     }
 649     if (!(dc = alloc_dc_ptr( OBJ_DC ))) return 0;
 650     hdc = dc->hSelf;
 651
 652     dc->module  = module;
 653     dc->hBitmap = GDI_inc_ref_count( GetStockObject( DEFAULT_BITMAP ));
 654
 655     TRACE("(driver=%s, device=%s, output=%s): returning %p\n",
 656           debugstr_w(driver), debugstr_w(device), debugstr_w(output), dc->hSelf );
 657
 658     if (funcs->pCreateDC)
 659     {
 660         if (!funcs->pCreateDC( &dc->physDev, buf, device, output, initData ))
 661         {
 662             WARN("creation aborted by device\n" );
 663             free_dc_ptr( dc );
 664             return 0;
 665         }
 666     }
 667
 668     dc->vis_rect.left   = 0;
 669     dc->vis_rect.top    = 0;
 670     dc->vis_rect.right  = GetDeviceCaps( hdc, DESKTOPHORZRES );
 671     dc->vis_rect.bottom = GetDeviceCaps( hdc, DESKTOPVERTRES );
 672
 673     DC_InitDC( dc );
 674     release_dc_ptr( dc );
 675     return hdc;
 676 }
 677
 678
 679 /***********************************************************************
 680  *           CreateDCA    (GDI32.@)
 681  */
 682 HDC WINAPI CreateDCA( LPCSTR driver, LPCSTR device, LPCSTR output,
 683                       const DEVMODEA *initData )
 684 {
 685     UNICODE_STRING driverW, deviceW, outputW;
 686     DEVMODEW *initDataW;
 687     HDC ret;
 688
 689     if (driver) RtlCreateUnicodeStringFromAsciiz(&driverW, driver);
 690     else driverW.Buffer = NULL;
 691
 692     if (device) RtlCreateUnicodeStringFromAsciiz(&deviceW, device);
 693     else deviceW.Buffer = NULL;
 694
 695     if (output) RtlCreateUnicodeStringFromAsciiz(&outputW, output);
 696     else outputW.Buffer = NULL;
 697
 698     initDataW = NULL;
 699     if (initData)
 700     {
 701         /* don't convert initData for DISPLAY driver, it's not used */
 702         if (!driverW.Buffer || strcmpiW( driverW.Buffer, displayW ))
 703             initDataW = GdiConvertToDevmodeW(initData);
 704     }
 705
 706     ret = CreateDCW( driverW.Buffer, deviceW.Buffer, outputW.Buffer, initDataW );
 707
 708     RtlFreeUnicodeString(&driverW);
 709     RtlFreeUnicodeString(&deviceW);
 710     RtlFreeUnicodeString(&outputW);
 711     HeapFree(GetProcessHeap(), 0, initDataW);
 712     return ret;
 713 }
 714
 715
 716 /***********************************************************************
 717  *           CreateICA    (GDI32.@)
 718  */
 719 HDC WINAPI CreateICA( LPCSTR driver, LPCSTR device, LPCSTR output,
 720                           const DEVMODEA* initData )
 721 {
 722       /* Nothing special yet for ICs */
 723     return CreateDCA( driver, device, output, initData );
 724 }
 725
 726
 727 /***********************************************************************
 728  *           CreateICW    (GDI32.@)
 729  */
 730 HDC WINAPI CreateICW( LPCWSTR driver, LPCWSTR device, LPCWSTR output,
 731                           const DEVMODEW* initData )
 732 {
 733       /* Nothing special yet for ICs */
 734     return CreateDCW( driver, device, output, initData );
 735 }
 736
 737
 738 /***********************************************************************
 739  *           CreateCompatibleDC   (GDI32.@)
 740  */
 741 HDC WINAPI CreateCompatibleDC( HDC hdc )
 742 {
 743     DC *dc, *origDC;
 744     HDC ret;
 745     const struct gdi_dc_funcs *funcs = &null_driver;
 746     PHYSDEV physDev = NULL;
 747
 748     GDI_CheckNotLock();
 749
 750     if (hdc)
 751     {
 752         if (!(origDC = get_dc_ptr( hdc ))) return 0;
 753         physDev = GET_DC_PHYSDEV( origDC, pCreateCompatibleDC );
 754         funcs = physDev->funcs;
 755         release_dc_ptr( origDC );
 756     }
 757
 758     if (!(dc = alloc_dc_ptr( OBJ_MEMDC ))) return 0;
 759
 760     TRACE("(%p): returning %p\n", hdc, dc->hSelf );
 761
 762     dc->hBitmap = GDI_inc_ref_count( GetStockObject( DEFAULT_BITMAP ));
 763     dc->vis_rect.left   = 0;
 764     dc->vis_rect.top    = 0;
 765     dc->vis_rect.right  = 1;
 766     dc->vis_rect.bottom = 1;
 767     dc->device_rect = dc->vis_rect;
 768
 769     ret = dc->hSelf;
 770
 771     if (!funcs->pCreateCompatibleDC( physDev, &dc->physDev ))
 772     {
 773         WARN("creation aborted by device\n");
 774         free_dc_ptr( dc );
 775         return 0;
 776     }
 777
 778     if (!dib_driver.pCreateDC( &dc->physDev, NULL, NULL, NULL, NULL ))
 779     {
 780         free_dc_ptr( dc );
 781         return 0;
 782     }
 783     physDev = GET_DC_PHYSDEV( dc, pSelectBitmap );
 784     physDev->funcs->pSelectBitmap( physDev, dc->hBitmap );
 785
 786     DC_InitDC( dc );
 787     release_dc_ptr( dc );
 788     return ret;
 789 }
 790
 791
 792 /***********************************************************************
 793  *           DeleteDC    (GDI32.@)
 794  */
 795 BOOL WINAPI DeleteDC( HDC hdc )
 796 {
 797     DC * dc;
 798
 799     TRACE("%p\n", hdc );
 800
 801     GDI_CheckNotLock();
 802
 803     if (!(dc = get_dc_ptr( hdc ))) return FALSE;
 804     if (dc->refcount != 1)
 805     {
 806         FIXME( "not deleting busy DC %p refcount %u\n", dc->hSelf, dc->refcount );
 807         release_dc_ptr( dc );
 808         return FALSE;
 809     }
 810
 811     /* Call hook procedure to check whether is it OK to delete this DC */
 812     if (dc->hookProc && !dc->hookProc( hdc, DCHC_DELETEDC, dc->dwHookData, 0 ))
 813     {
 814         release_dc_ptr( dc );
 815         return TRUE;
 816     }
 817     reset_dc_state( hdc );
 818     free_dc_ptr( dc );
 819     return TRUE;
 820 }
 821
 822
 823 /***********************************************************************
 824  *           ResetDCW    (GDI32.@)
 825  */
 826 HDC WINAPI ResetDCW( HDC hdc, const DEVMODEW *devmode )
 827 {
 828     DC *dc;
 829     HDC ret = 0;
 830
 831     if ((dc = get_dc_ptr( hdc )))
 832     {
 833         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pResetDC );
 834         ret = physdev->funcs->pResetDC( physdev, devmode );
 835         if (ret)  /* reset the visible region */
 836         {
 837             dc->dirty = 0;
 838             dc->vis_rect.left   = 0;
 839             dc->vis_rect.top    = 0;
 840             dc->vis_rect.right  = GetDeviceCaps( hdc, DESKTOPHORZRES );
 841             dc->vis_rect.bottom = GetDeviceCaps( hdc, DESKTOPVERTRES );
 842             if (dc->hVisRgn) DeleteObject( dc->hVisRgn );
 843             dc->hVisRgn = 0;
 844             update_dc_clipping( dc );
 845         }
 846         release_dc_ptr( dc );
 847     }
 848     return ret;
 849 }
 850
 851
 852 /***********************************************************************
 853  *           ResetDCA    (GDI32.@)
 854  */
 855 HDC WINAPI ResetDCA( HDC hdc, const DEVMODEA *devmode )
 856 {
 857     DEVMODEW *devmodeW;
 858     HDC ret;
 859
 860     if (devmode) devmodeW = GdiConvertToDevmodeW(devmode);
 861     else devmodeW = NULL;
 862
 863     ret = ResetDCW(hdc, devmodeW);
 864
 865     HeapFree(GetProcessHeap(), 0, devmodeW);
 866     return ret;
 867 }
 868
 869
 870 /***********************************************************************
 871  *           GetDeviceCaps    (GDI32.@)
 872  */
 873 INT WINAPI GetDeviceCaps( HDC hdc, INT cap )
 874 {
 875     DC *dc;
 876     INT ret = 0;
 877
 878     if ((dc = get_dc_ptr( hdc )))
 879     {
 880         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pGetDeviceCaps );
 881         ret = physdev->funcs->pGetDeviceCaps( physdev, cap );
 882         release_dc_ptr( dc );
 883     }
 884     return ret;
 885 }
 886
 887
 888 /***********************************************************************
 889  *              GetBkColor (GDI32.@)
 890  */
 891 COLORREF WINAPI GetBkColor( HDC hdc )
 892 {
 893     COLORREF ret = 0;
 894     DC * dc = get_dc_ptr( hdc );
 895     if (dc)
 896     {
 897         ret = dc->backgroundColor;
 898         release_dc_ptr( dc );
 899     }
 900     return ret;
 901 }
 902
 903
 904 /***********************************************************************
 905  *           SetBkColor    (GDI32.@)
 906  */
 907 COLORREF WINAPI SetBkColor( HDC hdc, COLORREF color )
 908 {
 909     COLORREF ret = CLR_INVALID;
 910     DC * dc = get_dc_ptr( hdc );
 911
 912     TRACE("hdc=%p color=0x%08x\n", hdc, color);
 913
 914     if (dc)
 915     {
 916         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetBkColor );
 917         ret = dc->backgroundColor;
 918         dc->backgroundColor = physdev->funcs->pSetBkColor( physdev, color );
 919         release_dc_ptr( dc );
 920     }
 921     return ret;
 922 }
 923
 924
 925 /***********************************************************************
 926  *              GetTextColor (GDI32.@)
 927  */
 928 COLORREF WINAPI GetTextColor( HDC hdc )
 929 {
 930     COLORREF ret = 0;
 931     DC * dc = get_dc_ptr( hdc );
 932     if (dc)
 933     {
 934         ret = dc->textColor;
 935         release_dc_ptr( dc );
 936     }
 937     return ret;
 938 }
 939
 940
 941 /***********************************************************************
 942  *           SetTextColor    (GDI32.@)
 943  */
 944 COLORREF WINAPI SetTextColor( HDC hdc, COLORREF color )
 945 {
 946     COLORREF ret = CLR_INVALID;
 947     DC * dc = get_dc_ptr( hdc );
 948
 949     TRACE(" hdc=%p color=0x%08x\n", hdc, color);
 950
 951     if (dc)
 952     {
 953         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetTextColor );
 954         ret = dc->textColor;
 955         dc->textColor = physdev->funcs->pSetTextColor( physdev, color );
 956         release_dc_ptr( dc );
 957     }
 958     return ret;
 959 }
 960
 961
 962 /***********************************************************************
 963  *              GetTextAlign (GDI32.@)
 964  */
 965 UINT WINAPI GetTextAlign( HDC hdc )
 966 {
 967     UINT ret = 0;
 968     DC * dc = get_dc_ptr( hdc );
 969     if (dc)
 970     {
 971         ret = dc->textAlign;
 972         release_dc_ptr( dc );
 973     }
 974     return ret;
 975 }
 976
 977
 978 /***********************************************************************
 979  *           SetTextAlign    (GDI32.@)
 980  */
 981 UINT WINAPI SetTextAlign( HDC hdc, UINT align )
 982 {
 983     UINT ret = GDI_ERROR;
 984     DC *dc = get_dc_ptr( hdc );
 985
 986     TRACE("hdc=%p align=%d\n", hdc, align);
 987
 988     if (dc)
 989     {
 990         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetTextAlign );
 991         align = physdev->funcs->pSetTextAlign( physdev, align );
 992         if (align != GDI_ERROR)
 993         {
 994             ret = dc->textAlign;
 995             dc->textAlign = align;
 996         }
 997         release_dc_ptr( dc );
 998     }
 999     return ret;
1000 }
1001
1002 /***********************************************************************
1003  *           GetDCOrgEx  (GDI32.@)
1004  */
1005 BOOL WINAPI GetDCOrgEx( HDC hDC, LPPOINT lpp )
1006 {
1007     DC * dc;
1008
1009     if (!lpp) return FALSE;
1010     if (!(dc = get_dc_ptr( hDC ))) return FALSE;
1011     lpp->x = dc->vis_rect.left;
1012     lpp->y = dc->vis_rect.top;
1013     release_dc_ptr( dc );
1014     return TRUE;
1015 }
1016
1017
1018 /***********************************************************************
1019  *              GetGraphicsMode (GDI32.@)
1020  */
1021 INT WINAPI GetGraphicsMode( HDC hdc )
1022 {
1023     INT ret = 0;
1024     DC * dc = get_dc_ptr( hdc );
1025     if (dc)
1026     {
1027         ret = dc->GraphicsMode;
1028         release_dc_ptr( dc );
1029     }
1030     return ret;
1031 }
1032
1033
1034 /***********************************************************************
1035  *           SetGraphicsMode    (GDI32.@)
1036  */
1037 INT WINAPI SetGraphicsMode( HDC hdc, INT mode )
1038 {
1039     INT ret = 0;
1040     DC *dc = get_dc_ptr( hdc );
1041
1042     /* One would think that setting the graphics mode to GM_COMPATIBLE
1043      * would also reset the world transformation matrix to the unity
1044      * matrix. However, in Windows, this is not the case. This doesn't
1045      * make a lot of sense to me, but that's the way it is.
1046      */
1047     if (!dc) return 0;
1048     if ((mode > 0) && (mode <= GM_LAST))
1049     {
1050         ret = dc->GraphicsMode;
1051         dc->GraphicsMode = mode;
1052     }
1053     release_dc_ptr( dc );
1054     /* font metrics depend on the graphics mode */
1055     if (ret) SelectObject(dc->hSelf, GetCurrentObject(dc->hSelf, OBJ_FONT));
1056     return ret;
1057 }
1058
1059
1060 /***********************************************************************
1061  *              GetArcDirection (GDI32.@)
1062  */
1063 INT WINAPI GetArcDirection( HDC hdc )
1064 {
1065     INT ret = 0;
1066     DC * dc = get_dc_ptr( hdc );
1067     if (dc)
1068     {
1069         ret = dc->ArcDirection;
1070         release_dc_ptr( dc );
1071     }
1072     return ret;
1073 }
1074
1075
1076 /***********************************************************************
1077  *           SetArcDirection    (GDI32.@)
1078  */
1079 INT WINAPI SetArcDirection( HDC hdc, INT dir )
1080 {
1081     DC * dc;
1082     INT ret = 0;
1083
1084     if (dir != AD_COUNTERCLOCKWISE && dir != AD_CLOCKWISE)
1085     {
1086         SetLastError(ERROR_INVALID_PARAMETER);
1087         return 0;
1088     }
1089
1090     if ((dc = get_dc_ptr( hdc )))
1091     {
1092         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetArcDirection );
1093         dir = physdev->funcs->pSetArcDirection( physdev, dir );
1094         if (dir)
1095         {
1096             ret = dc->ArcDirection;
1097             dc->ArcDirection = dir;
1098         }
1099         release_dc_ptr( dc );
1100     }
1101     return ret;
1102 }
1103
1104
1105 /***********************************************************************
1106  *           GetWorldTransform    (GDI32.@)
1107  */
1108 BOOL WINAPI GetWorldTransform( HDC hdc, LPXFORM xform )
1109 {
1110     DC * dc;
1111     if (!xform) return FALSE;
1112     if (!(dc = get_dc_ptr( hdc ))) return FALSE;
1113     *xform = dc->xformWorld2Wnd;
1114     release_dc_ptr( dc );
1115     return TRUE;
1116 }
1117
1118
1119 /***********************************************************************
1120  *           GetTransform    (GDI32.@)
1121  *
1122  * Undocumented
1123  *
1124  * Returns one of the co-ordinate space transforms
1125  *
1126  * PARAMS
1127  *    hdc   [I] Device context.
1128  *    which [I] Which xform to return:
1129  *                  0x203 World -> Page transform (that set by SetWorldTransform).
1130  *                  0x304 Page -> Device transform (the mapping mode transform).
1131  *                  0x204 World -> Device transform (the combination of the above two).
1132  *                  0x402 Device -> World transform (the inversion of the above).
1133  *    xform [O] The xform.
1134  *
1135  */
1136 BOOL WINAPI GetTransform( HDC hdc, DWORD which, XFORM *xform )
1137 {
1138     BOOL ret = TRUE;
1139     DC *dc = get_dc_ptr( hdc );
1140     if (!dc) return FALSE;
1141
1142     switch(which)
1143     {
1144     case 0x203:
1145         *xform = dc->xformWorld2Wnd;
1146         break;
1147
1148     case 0x304:
1149         construct_window_to_viewport(dc, xform);
1150         break;
1151
1152     case 0x204:
1153         *xform = dc->xformWorld2Vport;
1154         break;
1155
1156     case 0x402:
1157         *xform = dc->xformVport2World;
1158         break;
1159
1160     default:
1161         FIXME("Unknown code %x\n", which);
1162         ret = FALSE;
1163     }
1164
1165     release_dc_ptr( dc );
1166     return ret;
1167 }
1168
1169
1170 /****************************************************************************
1171  * CombineTransform [GDI32.@]
1172  * Combines two transformation matrices.
1173  *
1174  * PARAMS
1175  *    xformResult [O] Stores the result of combining the two matrices
1176  *    xform1      [I] Specifies the first matrix to apply
1177  *    xform2      [I] Specifies the second matrix to apply
1178  *
1179  * REMARKS
1180  *    The same matrix can be passed in for more than one of the parameters.
1181  *
1182  * RETURNS
1183  *  Success: TRUE.
1184  *  Failure: FALSE. Use GetLastError() to determine the cause.
1185  */
1186 BOOL WINAPI CombineTransform( LPXFORM xformResult, const XFORM *xform1,
1187     const XFORM *xform2 )
1188 {
1189     XFORM xformTemp;
1190
1191     /* Check for illegal parameters */
1192     if (!xformResult || !xform1 || !xform2)
1193         return FALSE;
1194
1195     /* Create the result in a temporary XFORM, since xformResult may be
1196      * equal to xform1 or xform2 */
1197     xformTemp.eM11 = xform1->eM11 * xform2->eM11 +
1198                      xform1->eM12 * xform2->eM21;
1199     xformTemp.eM12 = xform1->eM11 * xform2->eM12 +
1200                      xform1->eM12 * xform2->eM22;
1201     xformTemp.eM21 = xform1->eM21 * xform2->eM11 +
1202                      xform1->eM22 * xform2->eM21;
1203     xformTemp.eM22 = xform1->eM21 * xform2->eM12 +
1204                      xform1->eM22 * xform2->eM22;
1205     xformTemp.eDx  = xform1->eDx  * xform2->eM11 +
1206                      xform1->eDy  * xform2->eM21 +
1207                      xform2->eDx;
1208     xformTemp.eDy  = xform1->eDx  * xform2->eM12 +
1209                      xform1->eDy  * xform2->eM22 +
1210                      xform2->eDy;
1211
1212     /* Copy the result to xformResult */
1213     *xformResult = xformTemp;
1214
1215     return TRUE;
1216 }
1217
1218
1219 /***********************************************************************
1220  *           SetDCHook   (GDI32.@)
1221  *
1222  * Note: this doesn't exist in Win32, we add it here because user32 needs it.
1223  */
1224 BOOL WINAPI SetDCHook( HDC hdc, DCHOOKPROC hookProc, DWORD_PTR dwHookData )
1225 {
1226     DC *dc = get_dc_ptr( hdc );
1227
1228     if (!dc) return FALSE;
1229
1230     dc->dwHookData = dwHookData;
1231     dc->hookProc = hookProc;
1232     release_dc_ptr( dc );
1233     return TRUE;
1234 }
1235
1236
1237 /***********************************************************************
1238  *           GetDCHook   (GDI32.@)
1239  *
1240  * Note: this doesn't exist in Win32, we add it here because user32 needs it.
1241  */
1242 DWORD_PTR WINAPI GetDCHook( HDC hdc, DCHOOKPROC *proc )
1243 {
1244     DC *dc = get_dc_ptr( hdc );
1245     DWORD_PTR ret;
1246
1247     if (!dc) return 0;
1248     if (proc) *proc = dc->hookProc;
1249     ret = dc->dwHookData;
1250     release_dc_ptr( dc );
1251     return ret;
1252 }
1253
1254
1255 /***********************************************************************
1256  *           SetHookFlags   (GDI32.@)
1257  *
1258  * Note: this doesn't exist in Win32, we add it here because user32 needs it.
1259  */
1260 WORD WINAPI SetHookFlags( HDC hdc, WORD flags )
1261 {
1262     DC *dc = get_dc_obj( hdc );  /* not get_dc_ptr, this needs to work from any thread */
1263     LONG ret = 0;
1264
1265     if (!dc) return 0;
1266
1267     TRACE("hDC %p, flags %04x\n",hdc,flags);
1268
1269     if (flags & DCHF_INVALIDATEVISRGN)
1270         ret = InterlockedExchange( &dc->dirty, 1 );
1271     else if (flags & DCHF_VALIDATEVISRGN || !flags)
1272         ret = InterlockedExchange( &dc->dirty, 0 );
1273
1274     GDI_ReleaseObj( hdc );
1275
1276     if (flags & DCHF_RESETDC) ret = reset_dc_state( hdc );
1277     return ret;
1278 }
1279
1280 /***********************************************************************
1281  *           SetICMMode    (GDI32.@)
1282  */
1283 INT WINAPI SetICMMode(HDC hdc, INT iEnableICM)
1284 {
1285 /*FIXME:  Assume that ICM is always off, and cannot be turned on */
1286     if (iEnableICM == ICM_OFF) return ICM_OFF;
1287     if (iEnableICM == ICM_ON) return 0;
1288     if (iEnableICM == ICM_QUERY) return ICM_OFF;
1289     return 0;
1290 }
1291
1292 /***********************************************************************
1293  *           GetDeviceGammaRamp    (GDI32.@)
1294  */
1295 BOOL WINAPI GetDeviceGammaRamp(HDC hDC, LPVOID ptr)
1296 {
1297     BOOL ret = FALSE;
1298     DC *dc = get_dc_ptr( hDC );
1299
1300     TRACE("%p, %p\n", hDC, ptr);
1301     if( dc )
1302     {
1303         if (GetObjectType( hDC ) != OBJ_MEMDC)
1304         {
1305             PHYSDEV physdev = GET_DC_PHYSDEV( dc, pGetDeviceGammaRamp );
1306             ret = physdev->funcs->pGetDeviceGammaRamp( physdev, ptr );
1307         }
1308         else SetLastError( ERROR_INVALID_PARAMETER );
1309         release_dc_ptr( dc );
1310     }
1311     return ret;
1312 }
1313
1314 static BOOL check_gamma_ramps(void *ptr)
1315 {
1316     WORD *ramp = ptr;
1317
1318     while (ramp < (WORD*)ptr + 3 * 256)
1319     {
1320         float r_x, r_y, r_lx, r_ly, r_d, r_v, r_e, g_avg, g_min, g_max;
1321         unsigned i, f, l, g_n, c;
1322
1323         f = ramp[0];
1324         l = ramp[255];
1325         if (f >= l)
1326         {
1327             TRACE("inverted or flat gamma ramp (%d->%d), rejected\n", f, l);
1328             return FALSE;
1329         }
1330         r_d = l - f;
1331         g_min = g_max = g_avg = 0.0;
1332
1333         /* check gamma ramp entries to estimate the gamma */
1334         TRACE("analyzing gamma ramp (%d->%d)\n", f, l);
1335         for (i=1, g_n=0; i<255; i++)
1336         {
1337             if (ramp[i] < f || ramp[i] > l)
1338             {
1339                 TRACE("strange gamma ramp ([%d]=%d for %d->%d), rejected\n", i, ramp[i], f, l);
1340                 return FALSE;
1341             }
1342             c = ramp[i] - f;
1343             if (!c) continue; /* avoid log(0) */
1344
1345             /* normalize entry values into 0..1 range */
1346             r_x = i/255.0; r_y = c / r_d;
1347             /* compute logarithms of values */
1348             r_lx = log(r_x); r_ly = log(r_y);
1349             /* compute gamma for this entry */
1350             r_v = r_ly / r_lx;
1351             /* compute differential (error estimate) for this entry */
1352             /* some games use table-based logarithms that magnifies the error by 128 */
1353             r_e = -r_lx * 128 / (c * r_lx * r_lx);
1354
1355             /* compute min & max while compensating for estimated error */
1356             if (!g_n || g_min > (r_v + r_e)) g_min = r_v + r_e;
1357             if (!g_n || g_max < (r_v - r_e)) g_max = r_v - r_e;
1358
1359             /* add to average */
1360             g_avg += r_v;
1361             g_n++;
1362         }
1363
1364         if (!g_n)
1365         {
1366             TRACE("no gamma data, shouldn't happen\n");
1367             return FALSE;
1368         }
1369         g_avg /= g_n;
1370         TRACE("low bias is %d, high is %d, gamma is %5.3f\n", f, 65535-l, g_avg);
1371
1372         /* check that the gamma is reasonably uniform across the ramp */
1373         if (g_max - g_min > 12.8)
1374         {
1375             TRACE("ramp not uniform (max=%f, min=%f, avg=%f), rejected\n", g_max, g_min, g_avg);
1376             return FALSE;
1377         }
1378
1379         /* check that the gamma is not too bright */
1380         if (g_avg < 0.2)
1381         {
1382             TRACE("too bright gamma ( %5.3f), rejected\n", g_avg);
1383             return FALSE;
1384         }
1385
1386         ramp += 256;
1387     }
1388
1389     return TRUE;
1390 }
1391
1392 /***********************************************************************
1393  *           SetDeviceGammaRamp    (GDI32.@)
1394  */
1395 BOOL WINAPI SetDeviceGammaRamp(HDC hDC, LPVOID ptr)
1396 {
1397     BOOL ret = FALSE;
1398     DC *dc = get_dc_ptr( hDC );
1399
1400     TRACE("%p, %p\n", hDC, ptr);
1401     if( dc )
1402     {
1403         if (GetObjectType( hDC ) != OBJ_MEMDC)
1404         {
1405             PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetDeviceGammaRamp );
1406
1407             if (check_gamma_ramps(ptr))
1408                 ret = physdev->funcs->pSetDeviceGammaRamp( physdev, ptr );
1409         }
1410         else SetLastError( ERROR_INVALID_PARAMETER );
1411         release_dc_ptr( dc );
1412     }
1413     return ret;
1414 }
1415
1416 /***********************************************************************
1417  *           GetColorSpace    (GDI32.@)
1418  */
1419 HCOLORSPACE WINAPI GetColorSpace(HDC hdc)
1420 {
1421 /*FIXME    Need to do whatever GetColorSpace actually does */
1422     return 0;
1423 }
1424
1425 /***********************************************************************
1426  *           CreateColorSpaceA    (GDI32.@)
1427  */
1428 HCOLORSPACE WINAPI CreateColorSpaceA( LPLOGCOLORSPACEA lpLogColorSpace )
1429 {
1430   FIXME( "stub\n" );
1431   return 0;
1432 }
1433
1434 /***********************************************************************
1435  *           CreateColorSpaceW    (GDI32.@)
1436  */
1437 HCOLORSPACE WINAPI CreateColorSpaceW( LPLOGCOLORSPACEW lpLogColorSpace )
1438 {
1439   FIXME( "stub\n" );
1440   return 0;
1441 }
1442
1443 /***********************************************************************
1444  *           DeleteColorSpace     (GDI32.@)
1445  */
1446 BOOL WINAPI DeleteColorSpace( HCOLORSPACE hColorSpace )
1447 {
1448   FIXME( "stub\n" );
1449
1450   return TRUE;
1451 }
1452
1453 /***********************************************************************
1454  *           SetColorSpace     (GDI32.@)
1455  */
1456 HCOLORSPACE WINAPI SetColorSpace( HDC hDC, HCOLORSPACE hColorSpace )
1457 {
1458   FIXME( "stub\n" );
1459
1460   return hColorSpace;
1461 }
1462
1463 /***********************************************************************
1464  *           GetBoundsRect    (GDI32.@)
1465  */
1466 UINT WINAPI GetBoundsRect(HDC hdc, LPRECT rect, UINT flags)
1467 {
1468     PHYSDEV physdev;
1469     RECT device_rect;
1470     UINT ret;
1471     DC *dc = get_dc_ptr( hdc );
1472
1473     if ( !dc ) return 0;
1474
1475     physdev = GET_DC_PHYSDEV( dc, pGetBoundsRect );
1476     ret = physdev->funcs->pGetBoundsRect( physdev, &device_rect, DCB_RESET );
1477     if (!ret)
1478     {
1479         release_dc_ptr( dc );
1480         return 0;
1481     }
1482     if (dc->bounds_enabled && ret == DCB_SET) add_bounds_rect( &dc->bounds, &device_rect );
1483
1484     if (rect)
1485     {
1486         if (is_rect_empty( &dc->bounds ))
1487         {
1488             rect->left = rect->top = rect->right = rect->bottom = 0;
1489             ret = DCB_RESET;
1490         }
1491         else
1492         {
1493             *rect = dc->bounds;
1494             rect->left   = max( rect->left, 0 );
1495             rect->top    = max( rect->top, 0 );
1496             rect->right  = min( rect->right, dc->vis_rect.right - dc->vis_rect.left );
1497             rect->bottom = min( rect->bottom, dc->vis_rect.bottom - dc->vis_rect.top );
1498             ret = DCB_SET;
1499         }
1500         DPtoLP( hdc, (POINT *)rect, 2 );
1501     }
1502     else ret = 0;
1503
1504     if (flags & DCB_RESET) reset_bounds( &dc->bounds );
1505     release_dc_ptr( dc );
1506     return ret;
1507 }
1508
1509
1510 /***********************************************************************
1511  *           SetBoundsRect    (GDI32.@)
1512  */
1513 UINT WINAPI SetBoundsRect(HDC hdc, const RECT* rect, UINT flags)
1514 {
1515     PHYSDEV physdev;
1516     UINT ret;
1517     DC *dc;
1518
1519     if ((flags & DCB_ENABLE) && (flags & DCB_DISABLE)) return 0;
1520     if (!(dc = get_dc_ptr( hdc ))) return 0;
1521
1522     physdev = GET_DC_PHYSDEV( dc, pSetBoundsRect );
1523     ret = physdev->funcs->pSetBoundsRect( physdev, &dc->bounds, flags );
1524     if (!ret)
1525     {
1526         release_dc_ptr( dc );
1527         return 0;
1528     }
1529
1530     ret = (dc->bounds_enabled ? DCB_ENABLE : DCB_DISABLE) |
1531           (is_rect_empty( &dc->bounds ) ? ret & DCB_SET : DCB_SET);
1532
1533     if (flags & DCB_RESET) reset_bounds( &dc->bounds );
1534
1535     if ((flags & DCB_ACCUMULATE) && rect)
1536     {
1537         RECT rc = *rect;
1538
1539         LPtoDP( hdc, (POINT *)&rc, 2 );
1540         add_bounds_rect( &dc->bounds, &rc );
1541     }
1542
1543     if (flags & DCB_ENABLE) dc->bounds_enabled = TRUE;
1544     if (flags & DCB_DISABLE) dc->bounds_enabled = FALSE;
1545
1546     release_dc_ptr( dc );
1547     return ret;
1548 }
1549
1550
1551 /***********************************************************************
1552  *              GetRelAbs               (GDI32.@)
1553  */
1554 INT WINAPI GetRelAbs( HDC hdc, DWORD dwIgnore )
1555 {
1556     INT ret = 0;
1557     DC *dc = get_dc_ptr( hdc );
1558     if (dc)
1559     {
1560         ret = dc->relAbsMode;
1561         release_dc_ptr( dc );
1562     }
1563     return ret;
1564 }
1565
1566
1567
1568
1569 /***********************************************************************
1570  *              GetBkMode (GDI32.@)
1571  */
1572 INT WINAPI GetBkMode( HDC hdc )
1573 {
1574     INT ret = 0;
1575     DC * dc = get_dc_ptr( hdc );
1576     if (dc)
1577     {
1578         ret = dc->backgroundMode;
1579         release_dc_ptr( dc );
1580     }
1581     return ret;
1582 }
1583
1584
1585 /***********************************************************************
1586  *              SetBkMode (GDI32.@)
1587  */
1588 INT WINAPI SetBkMode( HDC hdc, INT mode )
1589 {
1590     INT ret = 0;
1591     DC *dc;
1592
1593     if ((mode <= 0) || (mode > BKMODE_LAST))
1594     {
1595         SetLastError(ERROR_INVALID_PARAMETER);
1596         return 0;
1597     }
1598     if ((dc = get_dc_ptr( hdc )))
1599     {
1600         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetBkMode );
1601         mode = physdev->funcs->pSetBkMode( physdev, mode );
1602         if (mode)
1603         {
1604             ret = dc->backgroundMode;
1605             dc->backgroundMode = mode;
1606         }
1607         release_dc_ptr( dc );
1608     }
1609     return ret;
1610 }
1611
1612
1613 /***********************************************************************
1614  *              GetROP2 (GDI32.@)
1615  */
1616 INT WINAPI GetROP2( HDC hdc )
1617 {
1618     INT ret = 0;
1619     DC * dc = get_dc_ptr( hdc );
1620     if (dc)
1621     {
1622         ret = dc->ROPmode;
1623         release_dc_ptr( dc );
1624     }
1625     return ret;
1626 }
1627
1628
1629 /***********************************************************************
1630  *              SetROP2 (GDI32.@)
1631  */
1632 INT WINAPI SetROP2( HDC hdc, INT mode )
1633 {
1634     INT ret = 0;
1635     DC *dc;
1636
1637     if ((mode < R2_BLACK) || (mode > R2_WHITE))
1638     {
1639         SetLastError(ERROR_INVALID_PARAMETER);
1640         return 0;
1641     }
1642     if ((dc = get_dc_ptr( hdc )))
1643     {
1644         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetROP2 );
1645         mode = physdev->funcs->pSetROP2( physdev, mode );
1646         if (mode)
1647         {
1648             ret = dc->ROPmode;
1649             dc->ROPmode = mode;
1650         }
1651         release_dc_ptr( dc );
1652     }
1653     return ret;
1654 }
1655
1656
1657 /***********************************************************************
1658  *              SetRelAbs (GDI32.@)
1659  */
1660 INT WINAPI SetRelAbs( HDC hdc, INT mode )
1661 {
1662     INT ret = 0;
1663     DC *dc;
1664
1665     if ((mode != ABSOLUTE) && (mode != RELATIVE))
1666     {
1667         SetLastError(ERROR_INVALID_PARAMETER);
1668         return 0;
1669     }
1670     if ((dc = get_dc_ptr( hdc )))
1671     {
1672         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetRelAbs );
1673         mode = physdev->funcs->pSetRelAbs( physdev, mode );
1674         if (mode)
1675         {
1676             ret = dc->relAbsMode;
1677             dc->relAbsMode = mode;
1678         }
1679         release_dc_ptr( dc );
1680     }
1681     return ret;
1682 }
1683
1684
1685 /***********************************************************************
1686  *              GetPolyFillMode (GDI32.@)
1687  */
1688 INT WINAPI GetPolyFillMode( HDC hdc )
1689 {
1690     INT ret = 0;
1691     DC * dc = get_dc_ptr( hdc );
1692     if (dc)
1693     {
1694         ret = dc->polyFillMode;
1695         release_dc_ptr( dc );
1696     }
1697     return ret;
1698 }
1699
1700
1701 /***********************************************************************
1702  *              SetPolyFillMode (GDI32.@)
1703  */
1704 INT WINAPI SetPolyFillMode( HDC hdc, INT mode )
1705 {
1706     INT ret = 0;
1707     DC *dc;
1708
1709     if ((mode <= 0) || (mode > POLYFILL_LAST))
1710     {
1711         SetLastError(ERROR_INVALID_PARAMETER);
1712         return 0;
1713     }
1714     if ((dc = get_dc_ptr( hdc )))
1715     {
1716         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetPolyFillMode );
1717         mode = physdev->funcs->pSetPolyFillMode( physdev, mode );
1718         if (mode)
1719         {
1720             ret = dc->polyFillMode;
1721             dc->polyFillMode = mode;
1722         }
1723         release_dc_ptr( dc );
1724     }
1725     return ret;
1726 }
1727
1728
1729 /***********************************************************************
1730  *              GetStretchBltMode (GDI32.@)
1731  */
1732 INT WINAPI GetStretchBltMode( HDC hdc )
1733 {
1734     INT ret = 0;
1735     DC * dc = get_dc_ptr( hdc );
1736     if (dc)
1737     {
1738         ret = dc->stretchBltMode;
1739         release_dc_ptr( dc );
1740     }
1741     return ret;
1742 }
1743
1744
1745 /***********************************************************************
1746  *              SetStretchBltMode (GDI32.@)
1747  */
1748 INT WINAPI SetStretchBltMode( HDC hdc, INT mode )
1749 {
1750     INT ret = 0;
1751     DC *dc;
1752
1753     if ((mode <= 0) || (mode > MAXSTRETCHBLTMODE))
1754     {
1755         SetLastError(ERROR_INVALID_PARAMETER);
1756         return 0;
1757     }
1758     if ((dc = get_dc_ptr( hdc )))
1759     {
1760         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetStretchBltMode );
1761         mode = physdev->funcs->pSetStretchBltMode( physdev, mode );
1762         if (mode)
1763         {
1764             ret = dc->stretchBltMode;
1765             dc->stretchBltMode = mode;
1766         }
1767         release_dc_ptr( dc );
1768     }
1769     return ret;
1770 }
1771
1772
1773 /***********************************************************************
1774  *              GetMapMode (GDI32.@)
1775  */
1776 INT WINAPI GetMapMode( HDC hdc )
1777 {
1778     INT ret = 0;
1779     DC * dc = get_dc_ptr( hdc );
1780     if (dc)
1781     {
1782         ret = dc->MapMode;
1783         release_dc_ptr( dc );
1784     }
1785     return ret;
1786 }
1787
1788
1789 /***********************************************************************
1790  *              GetBrushOrgEx (GDI32.@)
1791  */
1792 BOOL WINAPI GetBrushOrgEx( HDC hdc, LPPOINT pt )
1793 {
1794     DC * dc = get_dc_ptr( hdc );
1795     if (!dc) return FALSE;
1796     pt->x = dc->brushOrgX;
1797     pt->y = dc->brushOrgY;
1798     release_dc_ptr( dc );
1799     return TRUE;
1800 }
1801
1802
1803 /***********************************************************************
1804  *              GetCurrentPositionEx (GDI32.@)
1805  */
1806 BOOL WINAPI GetCurrentPositionEx( HDC hdc, LPPOINT pt )
1807 {
1808     DC * dc = get_dc_ptr( hdc );
1809     if (!dc) return FALSE;
1810     pt->x = dc->CursPosX;
1811     pt->y = dc->CursPosY;
1812     release_dc_ptr( dc );
1813     return TRUE;
1814 }
1815
1816
1817 /***********************************************************************
1818  *              GetViewportExtEx (GDI32.@)
1819  */
1820 BOOL WINAPI GetViewportExtEx( HDC hdc, LPSIZE size )
1821 {
1822     DC * dc = get_dc_ptr( hdc );
1823     if (!dc) return FALSE;
1824     size->cx = dc->vportExtX;
1825     size->cy = dc->vportExtY;
1826     release_dc_ptr( dc );
1827     return TRUE;
1828 }
1829
1830
1831 /***********************************************************************
1832  *              GetViewportOrgEx (GDI32.@)
1833  */
1834 BOOL WINAPI GetViewportOrgEx( HDC hdc, LPPOINT pt )
1835 {
1836     DC * dc = get_dc_ptr( hdc );
1837     if (!dc) return FALSE;
1838     pt->x = dc->vportOrgX;
1839     pt->y = dc->vportOrgY;
1840     release_dc_ptr( dc );
1841     return TRUE;
1842 }
1843
1844
1845 /***********************************************************************
1846  *              GetWindowExtEx (GDI32.@)
1847  */
1848 BOOL WINAPI GetWindowExtEx( HDC hdc, LPSIZE size )
1849 {
1850     DC * dc = get_dc_ptr( hdc );
1851     if (!dc) return FALSE;
1852     size->cx = dc->wndExtX;
1853     size->cy = dc->wndExtY;
1854     release_dc_ptr( dc );
1855     return TRUE;
1856 }
1857
1858
1859 /***********************************************************************
1860  *              GetWindowOrgEx (GDI32.@)
1861  */
1862 BOOL WINAPI GetWindowOrgEx( HDC hdc, LPPOINT pt )
1863 {
1864     DC * dc = get_dc_ptr( hdc );
1865     if (!dc) return FALSE;
1866     pt->x = dc->wndOrgX;
1867     pt->y = dc->wndOrgY;
1868     release_dc_ptr( dc );
1869     return TRUE;
1870 }
1871
1872
1873 /***********************************************************************
1874  *           GetLayout    (GDI32.@)
1875  *
1876  * Gets left->right or right->left text layout flags of a dc.
1877  *
1878  */
1879 DWORD WINAPI GetLayout(HDC hdc)
1880 {
1881     DWORD layout = GDI_ERROR;
1882
1883     DC * dc = get_dc_ptr( hdc );
1884     if (dc)
1885     {
1886         layout = dc->layout;
1887         release_dc_ptr( dc );
1888     }
1889
1890     TRACE("hdc : %p, layout : %08x\n", hdc, layout);
1891
1892     return layout;
1893 }
1894
1895 /***********************************************************************
1896  *           SetLayout    (GDI32.@)
1897  *
1898  * Sets left->right or right->left text layout flags of a dc.
1899  *
1900  */
1901 DWORD WINAPI SetLayout(HDC hdc, DWORD layout)
1902 {
1903     DWORD oldlayout = GDI_ERROR;
1904
1905     DC * dc = get_dc_ptr( hdc );
1906     if (dc)
1907     {
1908         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetLayout );
1909         layout = physdev->funcs->pSetLayout( physdev, layout );
1910         if (layout != GDI_ERROR)
1911         {
1912             oldlayout = dc->layout;
1913             dc->layout = layout;
1914             if (layout != oldlayout)
1915             {
1916                 if (layout & LAYOUT_RTL) dc->MapMode = MM_ANISOTROPIC;
1917                 DC_UpdateXforms( dc );
1918             }
1919         }
1920         release_dc_ptr( dc );
1921     }
1922
1923     TRACE("hdc : %p, old layout : %08x, new layout : %08x\n", hdc, oldlayout, layout);
1924
1925     return oldlayout;
1926 }
1927
1928 /***********************************************************************
1929  *           GetDCBrushColor    (GDI32.@)
1930  */
1931 COLORREF WINAPI GetDCBrushColor(HDC hdc)
1932 {
1933     DC *dc;
1934     COLORREF dcBrushColor = CLR_INVALID;
1935
1936     TRACE("hdc(%p)\n", hdc);
1937
1938     dc = get_dc_ptr( hdc );
1939     if (dc)
1940     {
1941         dcBrushColor = dc->dcBrushColor;
1942         release_dc_ptr( dc );
1943     }
1944
1945     return dcBrushColor;
1946 }
1947
1948 /***********************************************************************
1949  *           SetDCBrushColor    (GDI32.@)
1950  */
1951 COLORREF WINAPI SetDCBrushColor(HDC hdc, COLORREF crColor)
1952 {
1953     DC *dc;
1954     COLORREF oldClr = CLR_INVALID;
1955
1956     TRACE("hdc(%p) crColor(%08x)\n", hdc, crColor);
1957
1958     dc = get_dc_ptr( hdc );
1959     if (dc)
1960     {
1961         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetDCBrushColor );
1962         crColor = physdev->funcs->pSetDCBrushColor( physdev, crColor );
1963         if (crColor != CLR_INVALID)
1964         {
1965             oldClr = dc->dcBrushColor;
1966             dc->dcBrushColor = crColor;
1967         }
1968         release_dc_ptr( dc );
1969     }
1970
1971     return oldClr;
1972 }
1973
1974 /***********************************************************************
1975  *           GetDCPenColor    (GDI32.@)
1976  */
1977 COLORREF WINAPI GetDCPenColor(HDC hdc)
1978 {
1979     DC *dc;
1980     COLORREF dcPenColor = CLR_INVALID;
1981
1982     TRACE("hdc(%p)\n", hdc);
1983
1984     dc = get_dc_ptr( hdc );
1985     if (dc)
1986     {
1987         dcPenColor = dc->dcPenColor;
1988         release_dc_ptr( dc );
1989     }
1990
1991     return dcPenColor;
1992 }
1993
1994 /***********************************************************************
1995  *           SetDCPenColor    (GDI32.@)
1996  */
1997 COLORREF WINAPI SetDCPenColor(HDC hdc, COLORREF crColor)
1998 {
1999     DC *dc;
2000     COLORREF oldClr = CLR_INVALID;
2001
2002     TRACE("hdc(%p) crColor(%08x)\n", hdc, crColor);
2003
2004     dc = get_dc_ptr( hdc );
2005     if (dc)
2006     {
2007         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetDCPenColor );
2008         crColor = physdev->funcs->pSetDCPenColor( physdev, crColor );
2009         if (crColor != CLR_INVALID)
2010         {
2011             oldClr = dc->dcPenColor;
2012             dc->dcPenColor = crColor;
2013         }
2014         release_dc_ptr( dc );
2015     }
2016
2017     return oldClr;
2018 }
2019
2020 /***********************************************************************
2021  *           CancelDC    (GDI32.@)
2022  */
2023 BOOL WINAPI CancelDC(HDC hdc)
2024 {
2025     FIXME("stub\n");
2026     return TRUE;
2027 }
2028
2029 /*******************************************************************
2030  *      GetMiterLimit [GDI32.@]
2031  *
2032  *
2033  */
2034 BOOL WINAPI GetMiterLimit(HDC hdc, PFLOAT peLimit)
2035 {
2036     BOOL bRet = FALSE;
2037     DC *dc;
2038
2039     TRACE("(%p,%p)\n", hdc, peLimit);
2040
2041     dc = get_dc_ptr( hdc );
2042     if (dc)
2043     {
2044         if (peLimit)
2045             *peLimit = dc->miterLimit;
2046
2047         release_dc_ptr( dc );
2048         bRet = TRUE;
2049     }
2050     return bRet;
2051 }
2052
2053 /*******************************************************************
2054  *      SetMiterLimit [GDI32.@]
2055  *
2056  *
2057  */
2058 BOOL WINAPI SetMiterLimit(HDC hdc, FLOAT eNewLimit, PFLOAT peOldLimit)
2059 {
2060     BOOL bRet = FALSE;
2061     DC *dc;
2062
2063     TRACE("(%p,%f,%p)\n", hdc, eNewLimit, peOldLimit);
2064
2065     dc = get_dc_ptr( hdc );
2066     if (dc)
2067     {
2068         if (peOldLimit)
2069             *peOldLimit = dc->miterLimit;
2070         dc->miterLimit = eNewLimit;
2071         release_dc_ptr( dc );
2072         bRet = TRUE;
2073     }
2074     return bRet;
2075 }
2076
2077 /*******************************************************************
2078  *      GdiIsMetaPrintDC [GDI32.@]
2079  */
2080 BOOL WINAPI GdiIsMetaPrintDC(HDC hdc)
2081 {
2082     FIXME("%p\n", hdc);
2083     return FALSE;
2084 }
2085
2086 /*******************************************************************
2087  *      GdiIsMetaFileDC [GDI32.@]
2088  */
2089 BOOL WINAPI GdiIsMetaFileDC(HDC hdc)
2090 {
2091     TRACE("%p\n", hdc);
2092
2093     switch( GetObjectType( hdc ) )
2094     {
2095     case OBJ_METADC:
2096     case OBJ_ENHMETADC:
2097         return TRUE;
2098     }
2099     return FALSE;
2100 }
2101
2102 /*******************************************************************
2103  *      GdiIsPlayMetafileDC [GDI32.@]
2104  */
2105 BOOL WINAPI GdiIsPlayMetafileDC(HDC hdc)
2106 {
2107     FIXME("%p\n", hdc);
2108     return FALSE;
2109 }