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