dlls/gdi32/dc.c

   1 /*
   2  * GDI Device Context functions
   3  *
   4  * Copyright 1993 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "config.h"
  22
  23 #include <assert.h>
  24 #include <stdarg.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include "windef.h"
  28 #include "winbase.h"
  29 #include "wingdi.h"
  30 #include "winreg.h"
  31 #include "winternl.h"
  32 #include "winerror.h"
  33 #include "wownt32.h"
  34 #include "gdi_private.h"
  35 #include "wine/unicode.h"
  36 #include "wine/debug.h"
  37
  38 WINE_DEFAULT_DEBUG_CHANNEL(dc);
  39
  40 static const WCHAR displayW[] = { 'd','i','s','p','l','a','y',0 };
  41
  42 static BOOL DC_DeleteObject( HGDIOBJ handle );
  43
  44 static const struct gdi_obj_funcs dc_funcs =
  45 {
  46     NULL,             /* pSelectObject */
  47     NULL,             /* pGetObjectA */
  48     NULL,             /* pGetObjectW */
  49     NULL,             /* pUnrealizeObject */
  50     DC_DeleteObject   /* pDeleteObject */
  51 };
  52
  53
  54 static inline DC *get_dc_obj( HDC hdc )
  55 {
  56     DC *dc = GDI_GetObjPtr( hdc, 0 );
  57     if (!dc) return NULL;
  58
  59     if ((dc->header.type != OBJ_DC) &&
  60         (dc->header.type != OBJ_MEMDC) &&
  61         (dc->header.type != OBJ_METADC) &&
  62         (dc->header.type != OBJ_ENHMETADC))
  63     {
  64         GDI_ReleaseObj( hdc );
  65         SetLastError( ERROR_INVALID_HANDLE );
  66         dc = NULL;
  67     }
  68     return dc;
  69 }
  70
  71
  72 /***********************************************************************
  73  *           alloc_dc_ptr
  74  */
  75 DC *alloc_dc_ptr( const DC_FUNCTIONS *funcs, WORD magic )
  76 {
  77     DC *dc;
  78
  79     if (!(dc = HeapAlloc( GetProcessHeap(), 0, sizeof(*dc) ))) return NULL;
  80
  81     dc->funcs               = funcs;
  82     dc->physDev             = NULL;
  83     dc->thread              = GetCurrentThreadId();
  84     dc->refcount            = 1;
  85     dc->dirty               = 0;
  86     dc->saveLevel           = 0;
  87     dc->saved_dc            = 0;
  88     dc->dwHookData          = 0;
  89     dc->hookProc            = NULL;
  90     dc->wndOrgX             = 0;
  91     dc->wndOrgY             = 0;
  92     dc->wndExtX             = 1;
  93     dc->wndExtY             = 1;
  94     dc->vportOrgX           = 0;
  95     dc->vportOrgY           = 0;
  96     dc->vportExtX           = 1;
  97     dc->vportExtY           = 1;
  98     dc->miterLimit          = 10.0f; /* 10.0 is the default, from MSDN */
  99     dc->flags               = 0;
 100     dc->layout              = 0;
 101     dc->hClipRgn            = 0;
 102     dc->hMetaRgn            = 0;
 103     dc->hMetaClipRgn        = 0;
 104     dc->hVisRgn             = 0;
 105     dc->hPen                = GDI_inc_ref_count( GetStockObject( BLACK_PEN ));
 106     dc->hBrush              = GDI_inc_ref_count( GetStockObject( WHITE_BRUSH ));
 107     dc->hFont               = GDI_inc_ref_count( GetStockObject( SYSTEM_FONT ));
 108     dc->hBitmap             = 0;
 109     dc->hDevice             = 0;
 110     dc->hPalette            = GetStockObject( DEFAULT_PALETTE );
 111     dc->gdiFont             = 0;
 112     dc->font_code_page      = CP_ACP;
 113     dc->ROPmode             = R2_COPYPEN;
 114     dc->polyFillMode        = ALTERNATE;
 115     dc->stretchBltMode      = BLACKONWHITE;
 116     dc->relAbsMode          = ABSOLUTE;
 117     dc->backgroundMode      = OPAQUE;
 118     dc->backgroundColor     = RGB( 255, 255, 255 );
 119     dc->dcBrushColor        = RGB( 255, 255, 255 );
 120     dc->dcPenColor          = RGB( 0, 0, 0 );
 121     dc->textColor           = RGB( 0, 0, 0 );
 122     dc->brushOrgX           = 0;
 123     dc->brushOrgY           = 0;
 124     dc->textAlign           = TA_LEFT | TA_TOP | TA_NOUPDATECP;
 125     dc->charExtra           = 0;
 126     dc->breakExtra          = 0;
 127     dc->breakRem            = 0;
 128     dc->MapMode             = MM_TEXT;
 129     dc->GraphicsMode        = GM_COMPATIBLE;
 130     dc->pAbortProc          = NULL;
 131     dc->CursPosX            = 0;
 132     dc->CursPosY            = 0;
 133     dc->ArcDirection        = AD_COUNTERCLOCKWISE;
 134     dc->xformWorld2Wnd.eM11 = 1.0f;
 135     dc->xformWorld2Wnd.eM12 = 0.0f;
 136     dc->xformWorld2Wnd.eM21 = 0.0f;
 137     dc->xformWorld2Wnd.eM22 = 1.0f;
 138     dc->xformWorld2Wnd.eDx  = 0.0f;
 139     dc->xformWorld2Wnd.eDy  = 0.0f;
 140     dc->xformWorld2Vport    = dc->xformWorld2Wnd;
 141     dc->xformVport2World    = dc->xformWorld2Wnd;
 142     dc->vport2WorldValid    = TRUE;
 143     dc->BoundsRect.left     = 0;
 144     dc->BoundsRect.top      = 0;
 145     dc->BoundsRect.right    = 0;
 146     dc->BoundsRect.bottom   = 0;
 147     PATH_InitGdiPath(&dc->path);
 148
 149     if (!(dc->hSelf = alloc_gdi_handle( &dc->header, magic, &dc_funcs )))
 150     {
 151         HeapFree( GetProcessHeap(), 0, dc );
 152         dc = NULL;
 153     }
 154     return dc;
 155 }
 156
 157
 158
 159 /***********************************************************************
 160  *           free_dc_ptr
 161  */
 162 BOOL free_dc_ptr( DC *dc )
 163 {
 164     assert( dc->refcount == 1 );
 165     if (free_gdi_handle( dc->hSelf ) != dc) return FALSE;  /* shouldn't happen */
 166     if (dc->hClipRgn) DeleteObject( dc->hClipRgn );
 167     if (dc->hMetaRgn) DeleteObject( dc->hMetaRgn );
 168     if (dc->hMetaClipRgn) DeleteObject( dc->hMetaClipRgn );
 169     if (dc->hVisRgn) DeleteObject( dc->hVisRgn );
 170     PATH_DestroyGdiPath( &dc->path );
 171     return HeapFree( GetProcessHeap(), 0, dc );
 172 }
 173
 174
 175 /***********************************************************************
 176  *           get_dc_ptr
 177  *
 178  * Retrieve a DC pointer but release the GDI lock.
 179  */
 180 DC *get_dc_ptr( HDC hdc )
 181 {
 182     DC *dc = get_dc_obj( hdc );
 183     if (!dc) return NULL;
 184
 185     if (!InterlockedCompareExchange( &dc->refcount, 1, 0 ))
 186     {
 187         dc->thread = GetCurrentThreadId();
 188     }
 189     else if (dc->thread != GetCurrentThreadId())
 190     {
 191         WARN( "dc %p belongs to thread %04x\n", hdc, dc->thread );
 192         GDI_ReleaseObj( hdc );
 193         return NULL;
 194     }
 195     else InterlockedIncrement( &dc->refcount );
 196
 197     GDI_ReleaseObj( hdc );
 198     return dc;
 199 }
 200
 201
 202 /***********************************************************************
 203  *           release_dc_ptr
 204  */
 205 void release_dc_ptr( DC *dc )
 206 {
 207     LONG ref;
 208
 209     dc->thread = 0;
 210     ref = InterlockedDecrement( &dc->refcount );
 211     assert( ref >= 0 );
 212     if (ref) dc->thread = GetCurrentThreadId();  /* we still own it */
 213 }
 214
 215
 216 /***********************************************************************
 217  *           update_dc
 218  *
 219  * Make sure the DC vis region is up to date.
 220  * This function may call up to USER so the GDI lock should _not_
 221  * be held when calling it.
 222  */
 223 void update_dc( DC *dc )
 224 {
 225     if (InterlockedExchange( &dc->dirty, 0 ) && dc->hookProc)
 226         dc->hookProc( dc->hSelf, DCHC_INVALIDVISRGN, dc->dwHookData, 0 );
 227 }
 228
 229
 230 /***********************************************************************
 231  *           DC_DeleteObject
 232  */
 233 static BOOL DC_DeleteObject( HGDIOBJ handle )
 234 {
 235     return DeleteDC( handle );
 236 }
 237
 238
 239 /***********************************************************************
 240  *           DC_InitDC
 241  *
 242  * Setup device-specific DC values for a newly created DC.
 243  */
 244 void DC_InitDC( DC* dc )
 245 {
 246     if (dc->funcs->pRealizeDefaultPalette) dc->funcs->pRealizeDefaultPalette( dc->physDev );
 247     SetTextColor( dc->hSelf, dc->textColor );
 248     SetBkColor( dc->hSelf, dc->backgroundColor );
 249     SelectObject( dc->hSelf, dc->hPen );
 250     SelectObject( dc->hSelf, dc->hBrush );
 251     SelectObject( dc->hSelf, dc->hFont );
 252     CLIPPING_UpdateGCRegion( dc );
 253     SetVirtualResolution( dc->hSelf, 0, 0, 0, 0 );
 254 }
 255
 256
 257 /***********************************************************************
 258  *           DC_InvertXform
 259  *
 260  * Computes the inverse of the transformation xformSrc and stores it to
 261  * xformDest. Returns TRUE if successful or FALSE if the xformSrc matrix
 262  * is singular.
 263  */
 264 static BOOL DC_InvertXform( const XFORM *xformSrc, XFORM *xformDest )
 265 {
 266     double determinant;
 267
 268     determinant = xformSrc->eM11*xformSrc->eM22 -
 269         xformSrc->eM12*xformSrc->eM21;
 270     if (determinant > -1e-12 && determinant < 1e-12)
 271         return FALSE;
 272
 273     xformDest->eM11 =  xformSrc->eM22 / determinant;
 274     xformDest->eM12 = -xformSrc->eM12 / determinant;
 275     xformDest->eM21 = -xformSrc->eM21 / determinant;
 276     xformDest->eM22 =  xformSrc->eM11 / determinant;
 277     xformDest->eDx  = -xformSrc->eDx * xformDest->eM11 -
 278                        xformSrc->eDy * xformDest->eM21;
 279     xformDest->eDy  = -xformSrc->eDx * xformDest->eM12 -
 280                        xformSrc->eDy * xformDest->eM22;
 281
 282     return TRUE;
 283 }
 284
 285 /* Construct a transformation to do the window-to-viewport conversion */
 286 static void construct_window_to_viewport(DC *dc, XFORM *xform)
 287 {
 288     double scaleX, scaleY;
 289     scaleX = (double)dc->vportExtX / (double)dc->wndExtX;
 290     scaleY = (double)dc->vportExtY / (double)dc->wndExtY;
 291
 292     if (dc->layout & LAYOUT_RTL) scaleX = -scaleX;
 293     xform->eM11 = scaleX;
 294     xform->eM12 = 0.0;
 295     xform->eM21 = 0.0;
 296     xform->eM22 = scaleY;
 297     xform->eDx  = (double)dc->vportOrgX - scaleX * (double)dc->wndOrgX;
 298     xform->eDy  = (double)dc->vportOrgY - scaleY * (double)dc->wndOrgY;
 299     if (dc->layout & LAYOUT_RTL) xform->eDx = dc->vis_rect.right - dc->vis_rect.left - 1 - xform->eDx;
 300 }
 301
 302 /***********************************************************************
 303  *           DC_UpdateXforms
 304  *
 305  * Updates the xformWorld2Vport, xformVport2World and vport2WorldValid
 306  * fields of the specified DC by creating a transformation that
 307  * represents the current mapping mode and combining it with the DC's
 308  * world transform. This function should be called whenever the
 309  * parameters associated with the mapping mode (window and viewport
 310  * extents and origins) or the world transform change.
 311  */
 312 void DC_UpdateXforms( DC *dc )
 313 {
 314     XFORM xformWnd2Vport, oldworld2vport;
 315
 316     construct_window_to_viewport(dc, &xformWnd2Vport);
 317
 318     oldworld2vport = dc->xformWorld2Vport;
 319     /* Combine with the world transformation */
 320     CombineTransform( &dc->xformWorld2Vport, &dc->xformWorld2Wnd,
 321         &xformWnd2Vport );
 322
 323     /* Create inverse of world-to-viewport transformation */
 324     dc->vport2WorldValid = DC_InvertXform( &dc->xformWorld2Vport,
 325         &dc->xformVport2World );
 326
 327     /* Reselect the font and pen back into the dc so that the size
 328        gets updated. */
 329     if (memcmp(&oldworld2vport, &dc->xformWorld2Vport, sizeof(oldworld2vport)) &&
 330         !GdiIsMetaFileDC(dc->hSelf))
 331     {
 332         SelectObject(dc->hSelf, GetCurrentObject(dc->hSelf, OBJ_FONT));
 333         SelectObject(dc->hSelf, GetCurrentObject(dc->hSelf, OBJ_PEN));
 334     }
 335 }
 336
 337
 338 /***********************************************************************
 339  *           save_dc_state
 340  */
 341 INT save_dc_state( HDC hdc )
 342 {
 343     DC * newdc, * dc;
 344     INT ret;
 345
 346     if (!(dc = get_dc_ptr( hdc ))) return 0;
 347     if (!(newdc = HeapAlloc( GetProcessHeap(), 0, sizeof(*newdc ))))
 348     {
 349       release_dc_ptr( dc );
 350       return 0;
 351     }
 352
 353     newdc->flags            = dc->flags | DC_SAVED;
 354     newdc->layout           = dc->layout;
 355     newdc->hPen             = dc->hPen;
 356     newdc->hBrush           = dc->hBrush;
 357     newdc->hFont            = dc->hFont;
 358     newdc->hBitmap          = dc->hBitmap;
 359     newdc->hDevice          = dc->hDevice;
 360     newdc->hPalette         = dc->hPalette;
 361     newdc->ROPmode          = dc->ROPmode;
 362     newdc->polyFillMode     = dc->polyFillMode;
 363     newdc->stretchBltMode   = dc->stretchBltMode;
 364     newdc->relAbsMode       = dc->relAbsMode;
 365     newdc->backgroundMode   = dc->backgroundMode;
 366     newdc->backgroundColor  = dc->backgroundColor;
 367     newdc->textColor        = dc->textColor;
 368     newdc->dcBrushColor     = dc->dcBrushColor;
 369     newdc->dcPenColor       = dc->dcPenColor;
 370     newdc->brushOrgX        = dc->brushOrgX;
 371     newdc->brushOrgY        = dc->brushOrgY;
 372     newdc->textAlign        = dc->textAlign;
 373     newdc->charExtra        = dc->charExtra;
 374     newdc->breakExtra       = dc->breakExtra;
 375     newdc->breakRem         = dc->breakRem;
 376     newdc->MapMode          = dc->MapMode;
 377     newdc->GraphicsMode     = dc->GraphicsMode;
 378     newdc->CursPosX         = dc->CursPosX;
 379     newdc->CursPosY         = dc->CursPosY;
 380     newdc->ArcDirection     = dc->ArcDirection;
 381     newdc->xformWorld2Wnd   = dc->xformWorld2Wnd;
 382     newdc->xformWorld2Vport = dc->xformWorld2Vport;
 383     newdc->xformVport2World = dc->xformVport2World;
 384     newdc->vport2WorldValid = dc->vport2WorldValid;
 385     newdc->wndOrgX          = dc->wndOrgX;
 386     newdc->wndOrgY          = dc->wndOrgY;
 387     newdc->wndExtX          = dc->wndExtX;
 388     newdc->wndExtY          = dc->wndExtY;
 389     newdc->vportOrgX        = dc->vportOrgX;
 390     newdc->vportOrgY        = dc->vportOrgY;
 391     newdc->vportExtX        = dc->vportExtX;
 392     newdc->vportExtY        = dc->vportExtY;
 393     newdc->virtual_res      = dc->virtual_res;
 394     newdc->virtual_size     = dc->virtual_size;
 395     newdc->BoundsRect       = dc->BoundsRect;
 396     newdc->gdiFont          = dc->gdiFont;
 397
 398     newdc->thread    = GetCurrentThreadId();
 399     newdc->refcount  = 1;
 400     newdc->saveLevel = 0;
 401     newdc->saved_dc  = 0;
 402
 403     PATH_InitGdiPath( &newdc->path );
 404
 405     newdc->pAbortProc = NULL;
 406     newdc->hookProc   = NULL;
 407
 408     if (!(newdc->hSelf = alloc_gdi_handle( &newdc->header, dc->header.type, &dc_funcs )))
 409     {
 410         HeapFree( GetProcessHeap(), 0, newdc );
 411         release_dc_ptr( dc );
 412         return 0;
 413     }
 414
 415     /* Get/SetDCState() don't change hVisRgn field ("Undoc. Windows" p.559). */
 416
 417     newdc->hVisRgn      = 0;
 418     newdc->hClipRgn     = 0;
 419     newdc->hMetaRgn     = 0;
 420     newdc->hMetaClipRgn = 0;
 421     if (dc->hClipRgn)
 422     {
 423         newdc->hClipRgn = CreateRectRgn( 0, 0, 0, 0 );
 424         CombineRgn( newdc->hClipRgn, dc->hClipRgn, 0, RGN_COPY );
 425     }
 426     if (dc->hMetaRgn)
 427     {
 428         newdc->hMetaRgn = CreateRectRgn( 0, 0, 0, 0 );
 429         CombineRgn( newdc->hMetaRgn, dc->hMetaRgn, 0, RGN_COPY );
 430     }
 431     /* don't bother recomputing hMetaClipRgn, we'll do that in SetDCState */
 432
 433     if (!PATH_AssignGdiPath( &newdc->path, &dc->path ))
 434     {
 435         release_dc_ptr( dc );
 436         free_dc_ptr( newdc );
 437         return 0;
 438     }
 439
 440     newdc->saved_dc = dc->saved_dc;
 441     dc->saved_dc = newdc->hSelf;
 442     ret = ++dc->saveLevel;
 443     release_dc_ptr( newdc );
 444     release_dc_ptr( dc );
 445     return ret;
 446 }
 447
 448
 449 /***********************************************************************
 450  *           restore_dc_state
 451  */
 452 BOOL restore_dc_state( HDC hdc, INT level )
 453 {
 454     HDC hdcs, first_dcs;
 455     DC *dc, *dcs;
 456     INT save_level;
 457
 458     if (!(dc = get_dc_ptr( hdc ))) return FALSE;
 459
 460     /* find the state level to restore */
 461
 462     if (abs(level) > dc->saveLevel || level == 0)
 463     {
 464         release_dc_ptr( dc );
 465         return FALSE;
 466     }
 467     if (level < 0) level = dc->saveLevel + level + 1;
 468     first_dcs = dc->saved_dc;
 469     for (hdcs = first_dcs, save_level = dc->saveLevel; save_level > level; save_level--)
 470     {
 471         if (!(dcs = get_dc_ptr( hdcs )))
 472         {
 473             release_dc_ptr( dc );
 474             return FALSE;
 475         }
 476         hdcs = dcs->saved_dc;
 477         release_dc_ptr( dcs );
 478     }
 479
 480     /* restore the state */
 481
 482     if (!(dcs = get_dc_ptr( hdcs )))
 483     {
 484         release_dc_ptr( dc );
 485         return FALSE;
 486     }
 487     if (!PATH_AssignGdiPath( &dc->path, &dcs->path ))
 488     {
 489         release_dc_ptr( dcs );
 490         release_dc_ptr( dc );
 491         return FALSE;
 492     }
 493
 494     dc->flags            = dcs->flags & ~DC_SAVED;
 495     dc->layout           = dcs->layout;
 496     dc->hDevice          = dcs->hDevice;
 497     dc->ROPmode          = dcs->ROPmode;
 498     dc->polyFillMode     = dcs->polyFillMode;
 499     dc->stretchBltMode   = dcs->stretchBltMode;
 500     dc->relAbsMode       = dcs->relAbsMode;
 501     dc->backgroundMode   = dcs->backgroundMode;
 502     dc->backgroundColor  = dcs->backgroundColor;
 503     dc->textColor        = dcs->textColor;
 504     dc->dcBrushColor     = dcs->dcBrushColor;
 505     dc->dcPenColor       = dcs->dcPenColor;
 506     dc->brushOrgX        = dcs->brushOrgX;
 507     dc->brushOrgY        = dcs->brushOrgY;
 508     dc->textAlign        = dcs->textAlign;
 509     dc->charExtra        = dcs->charExtra;
 510     dc->breakExtra       = dcs->breakExtra;
 511     dc->breakRem         = dcs->breakRem;
 512     dc->MapMode          = dcs->MapMode;
 513     dc->GraphicsMode     = dcs->GraphicsMode;
 514     dc->CursPosX         = dcs->CursPosX;
 515     dc->CursPosY         = dcs->CursPosY;
 516     dc->ArcDirection     = dcs->ArcDirection;
 517     dc->xformWorld2Wnd   = dcs->xformWorld2Wnd;
 518     dc->xformWorld2Vport = dcs->xformWorld2Vport;
 519     dc->xformVport2World = dcs->xformVport2World;
 520     dc->vport2WorldValid = dcs->vport2WorldValid;
 521     dc->BoundsRect       = dcs->BoundsRect;
 522
 523     dc->wndOrgX          = dcs->wndOrgX;
 524     dc->wndOrgY          = dcs->wndOrgY;
 525     dc->wndExtX          = dcs->wndExtX;
 526     dc->wndExtY          = dcs->wndExtY;
 527     dc->vportOrgX        = dcs->vportOrgX;
 528     dc->vportOrgY        = dcs->vportOrgY;
 529     dc->vportExtX        = dcs->vportExtX;
 530     dc->vportExtY        = dcs->vportExtY;
 531     dc->virtual_res      = dcs->virtual_res;
 532     dc->virtual_size     = dcs->virtual_size;
 533
 534     if (dcs->hClipRgn)
 535     {
 536         if (!dc->hClipRgn) dc->hClipRgn = CreateRectRgn( 0, 0, 0, 0 );
 537         CombineRgn( dc->hClipRgn, dcs->hClipRgn, 0, RGN_COPY );
 538     }
 539     else
 540     {
 541         if (dc->hClipRgn) DeleteObject( dc->hClipRgn );
 542         dc->hClipRgn = 0;
 543     }
 544     if (dcs->hMetaRgn)
 545     {
 546         if (!dc->hMetaRgn) dc->hMetaRgn = CreateRectRgn( 0, 0, 0, 0 );
 547         CombineRgn( dc->hMetaRgn, dcs->hMetaRgn, 0, RGN_COPY );
 548     }
 549     else
 550     {
 551         if (dc->hMetaRgn) DeleteObject( dc->hMetaRgn );
 552         dc->hMetaRgn = 0;
 553     }
 554     DC_UpdateXforms( dc );
 555     CLIPPING_UpdateGCRegion( dc );
 556
 557     SelectObject( hdc, dcs->hBitmap );
 558     SelectObject( hdc, dcs->hBrush );
 559     SelectObject( hdc, dcs->hFont );
 560     SelectObject( hdc, dcs->hPen );
 561     SetBkColor( hdc, dcs->backgroundColor);
 562     SetTextColor( hdc, dcs->textColor);
 563     GDISelectPalette( hdc, dcs->hPalette, FALSE );
 564
 565     dc->saved_dc  = dcs->saved_dc;
 566     dcs->saved_dc = 0;
 567     dc->saveLevel = save_level - 1;
 568
 569     release_dc_ptr( dcs );
 570
 571     /* now destroy all the saved DCs */
 572
 573     while (first_dcs)
 574     {
 575         if (!(dcs = get_dc_ptr( first_dcs ))) break;
 576         hdcs = dcs->saved_dc;
 577         free_dc_ptr( dcs );
 578         first_dcs = hdcs;
 579     }
 580     release_dc_ptr( dc );
 581     return TRUE;
 582 }
 583
 584
 585 /***********************************************************************
 586  *           SaveDC    (GDI32.@)
 587  */
 588 INT WINAPI SaveDC( HDC hdc )
 589 {
 590     DC * dc;
 591     INT ret;
 592
 593     if (!(dc = get_dc_ptr( hdc ))) return 0;
 594
 595     if(dc->funcs->pSaveDC)
 596         ret = dc->funcs->pSaveDC( dc->physDev );
 597     else
 598         ret = save_dc_state( hdc );
 599
 600     release_dc_ptr( dc );
 601     return ret;
 602 }
 603
 604
 605 /***********************************************************************
 606  *           RestoreDC    (GDI32.@)
 607  */
 608 BOOL WINAPI RestoreDC( HDC hdc, INT level )
 609 {
 610     DC *dc;
 611     BOOL success;
 612
 613     TRACE("%p %d\n", hdc, level );
 614     if (!(dc = get_dc_ptr( hdc ))) return FALSE;
 615     update_dc( dc );
 616
 617     if(dc->funcs->pRestoreDC)
 618         success = dc->funcs->pRestoreDC( dc->physDev, level );
 619     else
 620         success = restore_dc_state( hdc, level );
 621
 622     release_dc_ptr( dc );
 623     return success;
 624 }
 625
 626
 627 /***********************************************************************
 628  *           CreateDCW    (GDI32.@)
 629  */
 630 HDC WINAPI CreateDCW( LPCWSTR driver, LPCWSTR device, LPCWSTR output,
 631                       const DEVMODEW *initData )
 632 {
 633     HDC hdc;
 634     DC * dc;
 635     const DC_FUNCTIONS *funcs;
 636     WCHAR buf[300];
 637
 638     GDI_CheckNotLock();
 639
 640     if (!device || !DRIVER_GetDriverName( device, buf, 300 ))
 641     {
 642         if (!driver)
 643         {
 644             ERR( "no device found for %s\n", debugstr_w(device) );
 645             return 0;
 646         }
 647         strcpyW(buf, driver);
 648     }
 649
 650     if (!(funcs = DRIVER_load_driver( buf )))
 651     {
 652         ERR( "no driver found for %s\n", debugstr_w(buf) );
 653         return 0;
 654     }
 655     if (!(dc = alloc_dc_ptr( funcs, OBJ_DC ))) goto error;
 656     hdc = dc->hSelf;
 657
 658     dc->hBitmap = GDI_inc_ref_count( GetStockObject( DEFAULT_BITMAP ));
 659     if (!(dc->hVisRgn = CreateRectRgn( 0, 0, 1, 1 ))) goto error;
 660
 661     TRACE("(driver=%s, device=%s, output=%s): returning %p\n",
 662           debugstr_w(driver), debugstr_w(device), debugstr_w(output), dc->hSelf );
 663
 664     if (dc->funcs->pCreateDC &&
 665         !dc->funcs->pCreateDC( hdc, &dc->physDev, buf, device, output, initData ))
 666     {
 667         WARN("creation aborted by device\n" );
 668         goto error;
 669     }
 670
 671     dc->vis_rect.left   = 0;
 672     dc->vis_rect.top    = 0;
 673     dc->vis_rect.right  = GetDeviceCaps( hdc, DESKTOPHORZRES );
 674     dc->vis_rect.bottom = GetDeviceCaps( hdc, DESKTOPVERTRES );
 675     SetRectRgn(dc->hVisRgn, dc->vis_rect.left, dc->vis_rect.top, dc->vis_rect.right, dc->vis_rect.bottom);
 676
 677     DC_InitDC( dc );
 678     release_dc_ptr( dc );
 679     return hdc;
 680
 681 error:
 682     if (dc) free_dc_ptr( dc );
 683     return 0;
 684 }
 685
 686
 687 /***********************************************************************
 688  *           CreateDCA    (GDI32.@)
 689  */
 690 HDC WINAPI CreateDCA( LPCSTR driver, LPCSTR device, LPCSTR output,
 691                       const DEVMODEA *initData )
 692 {
 693     UNICODE_STRING driverW, deviceW, outputW;
 694     DEVMODEW *initDataW;
 695     HDC ret;
 696
 697     if (driver) RtlCreateUnicodeStringFromAsciiz(&driverW, driver);
 698     else driverW.Buffer = NULL;
 699
 700     if (device) RtlCreateUnicodeStringFromAsciiz(&deviceW, device);
 701     else deviceW.Buffer = NULL;
 702
 703     if (output) RtlCreateUnicodeStringFromAsciiz(&outputW, output);
 704     else outputW.Buffer = NULL;
 705
 706     initDataW = NULL;
 707     if (initData)
 708     {
 709         /* don't convert initData for DISPLAY driver, it's not used */
 710         if (!driverW.Buffer || strcmpiW( driverW.Buffer, displayW ))
 711             initDataW = GdiConvertToDevmodeW(initData);
 712     }
 713
 714     ret = CreateDCW( driverW.Buffer, deviceW.Buffer, outputW.Buffer, initDataW );
 715
 716     RtlFreeUnicodeString(&driverW);
 717     RtlFreeUnicodeString(&deviceW);
 718     RtlFreeUnicodeString(&outputW);
 719     HeapFree(GetProcessHeap(), 0, initDataW);
 720     return ret;
 721 }
 722
 723
 724 /***********************************************************************
 725  *           CreateICA    (GDI32.@)
 726  */
 727 HDC WINAPI CreateICA( LPCSTR driver, LPCSTR device, LPCSTR output,
 728                           const DEVMODEA* initData )
 729 {
 730       /* Nothing special yet for ICs */
 731     return CreateDCA( driver, device, output, initData );
 732 }
 733
 734
 735 /***********************************************************************
 736  *           CreateICW    (GDI32.@)
 737  */
 738 HDC WINAPI CreateICW( LPCWSTR driver, LPCWSTR device, LPCWSTR output,
 739                           const DEVMODEW* initData )
 740 {
 741       /* Nothing special yet for ICs */
 742     return CreateDCW( driver, device, output, initData );
 743 }
 744
 745
 746 /***********************************************************************
 747  *           CreateCompatibleDC   (GDI32.@)
 748  */
 749 HDC WINAPI CreateCompatibleDC( HDC hdc )
 750 {
 751     DC *dc, *origDC;
 752     HDC ret;
 753     const DC_FUNCTIONS *funcs = NULL;
 754     PHYSDEV physDev = NULL;
 755
 756     GDI_CheckNotLock();
 757
 758     if (hdc)
 759     {
 760         if (!(origDC = get_dc_ptr( hdc ))) return 0;
 761         if (GetObjectType( hdc ) == OBJ_DC)
 762         {
 763             funcs = origDC->funcs;
 764             physDev = origDC->physDev;
 765         }
 766         release_dc_ptr( origDC );
 767     }
 768
 769     if (!funcs && !(funcs = DRIVER_get_display_driver())) return 0;
 770
 771     if (!(dc = alloc_dc_ptr( funcs, OBJ_MEMDC ))) goto error;
 772
 773     TRACE("(%p): returning %p\n", hdc, dc->hSelf );
 774
 775     dc->hBitmap = GDI_inc_ref_count( GetStockObject( DEFAULT_BITMAP ));
 776     dc->vis_rect.left   = 0;
 777     dc->vis_rect.top    = 0;
 778     dc->vis_rect.right  = 1;
 779     dc->vis_rect.bottom = 1;
 780     if (!(dc->hVisRgn = CreateRectRgn( 0, 0, 1, 1 ))) goto error;   /* default bitmap is 1x1 */
 781
 782     /* Copy the driver-specific physical device info into
 783      * the new DC. The driver may use this read-only info
 784      * while creating the compatible DC below. */
 785     dc->physDev = physDev;
 786     ret = dc->hSelf;
 787
 788     if (dc->funcs->pCreateDC &&
 789         !dc->funcs->pCreateDC( dc->hSelf, &dc->physDev, NULL, NULL, NULL, NULL ))
 790     {
 791         WARN("creation aborted by device\n");
 792         goto error;
 793     }
 794
 795     DC_InitDC( dc );
 796     release_dc_ptr( dc );
 797     return ret;
 798
 799 error:
 800     if (dc) free_dc_ptr( dc );
 801     return 0;
 802 }
 803
 804
 805 /***********************************************************************
 806  *           DeleteDC    (GDI32.@)
 807  */
 808 BOOL WINAPI DeleteDC( HDC hdc )
 809 {
 810     DC * dc;
 811
 812     TRACE("%p\n", hdc );
 813
 814     GDI_CheckNotLock();
 815
 816     if (!(dc = get_dc_ptr( hdc ))) return FALSE;
 817     if (dc->refcount != 1)
 818     {
 819         FIXME( "not deleting busy DC %p refcount %u\n", dc->hSelf, dc->refcount );
 820         release_dc_ptr( dc );
 821         return FALSE;
 822     }
 823
 824     /* Call hook procedure to check whether is it OK to delete this DC */
 825     if (dc->hookProc && !dc->hookProc( hdc, DCHC_DELETEDC, dc->dwHookData, 0 ))
 826     {
 827         release_dc_ptr( dc );
 828         return TRUE;
 829     }
 830
 831     while (dc->saveLevel)
 832     {
 833         DC * dcs;
 834         HDC hdcs = dc->saved_dc;
 835         if (!(dcs = get_dc_ptr( hdcs ))) break;
 836         dc->saved_dc = dcs->saved_dc;
 837         dc->saveLevel--;
 838         free_dc_ptr( dcs );
 839     }
 840
 841     if (!(dc->flags & DC_SAVED))
 842     {
 843         SelectObject( hdc, GetStockObject(BLACK_PEN) );
 844         SelectObject( hdc, GetStockObject(WHITE_BRUSH) );
 845         SelectObject( hdc, GetStockObject(SYSTEM_FONT) );
 846         SelectObject( hdc, GetStockObject(DEFAULT_BITMAP) );
 847         if (dc->funcs->pDeleteDC) dc->funcs->pDeleteDC(dc->physDev);
 848         dc->physDev = NULL;
 849     }
 850
 851     free_dc_ptr( dc );
 852     return TRUE;
 853 }
 854
 855
 856 /***********************************************************************
 857  *           ResetDCW    (GDI32.@)
 858  */
 859 HDC WINAPI ResetDCW( HDC hdc, const DEVMODEW *devmode )
 860 {
 861     DC *dc;
 862     HDC ret = hdc;
 863
 864     if ((dc = get_dc_ptr( hdc )))
 865     {
 866         if (dc->funcs->pResetDC)
 867         {
 868             ret = dc->funcs->pResetDC( dc->physDev, devmode );
 869             if (ret)  /* reset the visible region */
 870             {
 871                 dc->dirty = 0;
 872                 dc->vis_rect.left   = 0;
 873                 dc->vis_rect.top    = 0;
 874                 dc->vis_rect.right  = GetDeviceCaps( hdc, DESKTOPHORZRES );
 875                 dc->vis_rect.bottom = GetDeviceCaps( hdc, DESKTOPVERTRES );
 876                 SetRectRgn( dc->hVisRgn, dc->vis_rect.left, dc->vis_rect.top,
 877                             dc->vis_rect.right, dc->vis_rect.bottom );
 878                 CLIPPING_UpdateGCRegion( dc );
 879             }
 880         }
 881         release_dc_ptr( dc );
 882     }
 883     return ret;
 884 }
 885
 886
 887 /***********************************************************************
 888  *           ResetDCA    (GDI32.@)
 889  */
 890 HDC WINAPI ResetDCA( HDC hdc, const DEVMODEA *devmode )
 891 {
 892     DEVMODEW *devmodeW;
 893     HDC ret;
 894
 895     if (devmode) devmodeW = GdiConvertToDevmodeW(devmode);
 896     else devmodeW = NULL;
 897
 898     ret = ResetDCW(hdc, devmodeW);
 899
 900     HeapFree(GetProcessHeap(), 0, devmodeW);
 901     return ret;
 902 }
 903
 904
 905 /***********************************************************************
 906  *           GetDeviceCaps    (GDI32.@)
 907  */
 908 INT WINAPI GetDeviceCaps( HDC hdc, INT cap )
 909 {
 910     DC *dc;
 911     INT ret = 0;
 912
 913     if ((dc = get_dc_ptr( hdc )))
 914     {
 915         if (dc->funcs->pGetDeviceCaps) ret = dc->funcs->pGetDeviceCaps( dc->physDev, cap );
 916         else switch(cap)  /* return meaningful values for some entries */
 917         {
 918         case HORZRES:     ret = 640; break;
 919         case VERTRES:     ret = 480; break;
 920         case BITSPIXEL:   ret = 1; break;
 921         case PLANES:      ret = 1; break;
 922         case NUMCOLORS:   ret = 2; break;
 923         case ASPECTX:     ret = 36; break;
 924         case ASPECTY:     ret = 36; break;
 925         case ASPECTXY:    ret = 51; break;
 926         case LOGPIXELSX:  ret = 72; break;
 927         case LOGPIXELSY:  ret = 72; break;
 928         case SIZEPALETTE: ret = 2; break;
 929         case TEXTCAPS:
 930             ret = (TC_OP_CHARACTER | TC_OP_STROKE | TC_CP_STROKE |
 931                    TC_CR_ANY | TC_SF_X_YINDEP | TC_SA_DOUBLE | TC_SA_INTEGER |
 932                    TC_SA_CONTIN | TC_UA_ABLE | TC_SO_ABLE | TC_RA_ABLE | TC_VA_ABLE);
 933             break;
 934         }
 935         release_dc_ptr( dc );
 936     }
 937     return ret;
 938 }
 939
 940
 941 /***********************************************************************
 942  *              GetBkColor (GDI32.@)
 943  */
 944 COLORREF WINAPI GetBkColor( HDC hdc )
 945 {
 946     COLORREF ret = 0;
 947     DC * dc = get_dc_ptr( hdc );
 948     if (dc)
 949     {
 950         ret = dc->backgroundColor;
 951         release_dc_ptr( dc );
 952     }
 953     return ret;
 954 }
 955
 956
 957 /***********************************************************************
 958  *           SetBkColor    (GDI32.@)
 959  */
 960 COLORREF WINAPI SetBkColor( HDC hdc, COLORREF color )
 961 {
 962     COLORREF oldColor;
 963     DC * dc = get_dc_ptr( hdc );
 964
 965     TRACE("hdc=%p color=0x%08x\n", hdc, color);
 966
 967     if (!dc) return CLR_INVALID;
 968     oldColor = dc->backgroundColor;
 969     if (dc->funcs->pSetBkColor)
 970     {
 971         color = dc->funcs->pSetBkColor(dc->physDev, color);
 972         if (color == CLR_INVALID)  /* don't change it */
 973         {
 974             color = oldColor;
 975             oldColor = CLR_INVALID;
 976         }
 977     }
 978     dc->backgroundColor = color;
 979     release_dc_ptr( dc );
 980     return oldColor;
 981 }
 982
 983
 984 /***********************************************************************
 985  *              GetTextColor (GDI32.@)
 986  */
 987 COLORREF WINAPI GetTextColor( HDC hdc )
 988 {
 989     COLORREF ret = 0;
 990     DC * dc = get_dc_ptr( hdc );
 991     if (dc)
 992     {
 993         ret = dc->textColor;
 994         release_dc_ptr( dc );
 995     }
 996     return ret;
 997 }
 998
 999
1000 /***********************************************************************
1001  *           SetTextColor    (GDI32.@)
1002  */
1003 COLORREF WINAPI SetTextColor( HDC hdc, COLORREF color )
1004 {
1005     COLORREF oldColor;
1006     DC * dc = get_dc_ptr( hdc );
1007
1008     TRACE(" hdc=%p color=0x%08x\n", hdc, color);
1009
1010     if (!dc) return CLR_INVALID;
1011     oldColor = dc->textColor;
1012     if (dc->funcs->pSetTextColor)
1013     {
1014         color = dc->funcs->pSetTextColor(dc->physDev, color);
1015         if (color == CLR_INVALID)  /* don't change it */
1016         {
1017             color = oldColor;
1018             oldColor = CLR_INVALID;
1019         }
1020     }
1021     dc->textColor = color;
1022     release_dc_ptr( dc );
1023     return oldColor;
1024 }
1025
1026
1027 /***********************************************************************
1028  *              GetTextAlign (GDI32.@)
1029  */
1030 UINT WINAPI GetTextAlign( HDC hdc )
1031 {
1032     UINT ret = 0;
1033     DC * dc = get_dc_ptr( hdc );
1034     if (dc)
1035     {
1036         ret = dc->textAlign;
1037         release_dc_ptr( dc );
1038     }
1039     return ret;
1040 }
1041
1042
1043 /***********************************************************************
1044  *           SetTextAlign    (GDI32.@)
1045  */
1046 UINT WINAPI SetTextAlign( HDC hdc, UINT align )
1047 {
1048     UINT ret;
1049     DC *dc = get_dc_ptr( hdc );
1050
1051     TRACE("hdc=%p align=%d\n", hdc, align);
1052
1053     if (!dc) return 0x0;
1054     ret = dc->textAlign;
1055     if (dc->funcs->pSetTextAlign)
1056         if (!dc->funcs->pSetTextAlign(dc->physDev, align))
1057             ret = GDI_ERROR;
1058     if (ret != GDI_ERROR)
1059         dc->textAlign = align;
1060     release_dc_ptr( dc );
1061     return ret;
1062 }
1063
1064 /***********************************************************************
1065  *           GetDCOrgEx  (GDI32.@)
1066  */
1067 BOOL WINAPI GetDCOrgEx( HDC hDC, LPPOINT lpp )
1068 {
1069     DC * dc;
1070
1071     if (!lpp) return FALSE;
1072     if (!(dc = get_dc_ptr( hDC ))) return FALSE;
1073     lpp->x = dc->vis_rect.left;
1074     lpp->y = dc->vis_rect.top;
1075     release_dc_ptr( dc );
1076     return TRUE;
1077 }
1078
1079
1080 /***********************************************************************
1081  *              GetGraphicsMode (GDI32.@)
1082  */
1083 INT WINAPI GetGraphicsMode( HDC hdc )
1084 {
1085     INT ret = 0;
1086     DC * dc = get_dc_ptr( hdc );
1087     if (dc)
1088     {
1089         ret = dc->GraphicsMode;
1090         release_dc_ptr( dc );
1091     }
1092     return ret;
1093 }
1094
1095
1096 /***********************************************************************
1097  *           SetGraphicsMode    (GDI32.@)
1098  */
1099 INT WINAPI SetGraphicsMode( HDC hdc, INT mode )
1100 {
1101     INT ret = 0;
1102     DC *dc = get_dc_ptr( hdc );
1103
1104     /* One would think that setting the graphics mode to GM_COMPATIBLE
1105      * would also reset the world transformation matrix to the unity
1106      * matrix. However, in Windows, this is not the case. This doesn't
1107      * make a lot of sense to me, but that's the way it is.
1108      */
1109     if (!dc) return 0;
1110     if ((mode > 0) && (mode <= GM_LAST))
1111     {
1112         ret = dc->GraphicsMode;
1113         dc->GraphicsMode = mode;
1114     }
1115     release_dc_ptr( dc );
1116     return ret;
1117 }
1118
1119
1120 /***********************************************************************
1121  *              GetArcDirection (GDI32.@)
1122  */
1123 INT WINAPI GetArcDirection( HDC hdc )
1124 {
1125     INT ret = 0;
1126     DC * dc = get_dc_ptr( hdc );
1127     if (dc)
1128     {
1129         ret = dc->ArcDirection;
1130         release_dc_ptr( dc );
1131     }
1132     return ret;
1133 }
1134
1135
1136 /***********************************************************************
1137  *           SetArcDirection    (GDI32.@)
1138  */
1139 INT WINAPI SetArcDirection( HDC hdc, INT nDirection )
1140 {
1141     DC * dc;
1142     INT nOldDirection = 0;
1143
1144     if (nDirection!=AD_COUNTERCLOCKWISE && nDirection!=AD_CLOCKWISE)
1145     {
1146         SetLastError(ERROR_INVALID_PARAMETER);
1147         return 0;
1148     }
1149
1150     if ((dc = get_dc_ptr( hdc )))
1151     {
1152         if (dc->funcs->pSetArcDirection)
1153         {
1154             dc->funcs->pSetArcDirection(dc->physDev, nDirection);
1155         }
1156         nOldDirection = dc->ArcDirection;
1157         dc->ArcDirection = nDirection;
1158         release_dc_ptr( dc );
1159     }
1160     return nOldDirection;
1161 }
1162
1163
1164 /***********************************************************************
1165  *           GetWorldTransform    (GDI32.@)
1166  */
1167 BOOL WINAPI GetWorldTransform( HDC hdc, LPXFORM xform )
1168 {
1169     DC * dc;
1170     if (!xform) return FALSE;
1171     if (!(dc = get_dc_ptr( hdc ))) return FALSE;
1172     *xform = dc->xformWorld2Wnd;
1173     release_dc_ptr( dc );
1174     return TRUE;
1175 }
1176
1177
1178 /***********************************************************************
1179  *           GetTransform    (GDI32.@)
1180  *
1181  * Undocumented
1182  *
1183  * Returns one of the co-ordinate space transforms
1184  *
1185  * PARAMS
1186  *    hdc   [I] Device context.
1187  *    which [I] Which xform to return:
1188  *                  0x203 World -> Page transform (that set by SetWorldTransform).
1189  *                  0x304 Page -> Device transform (the mapping mode transform).
1190  *                  0x204 World -> Device transform (the combination of the above two).
1191  *                  0x402 Device -> World transform (the inversion of the above).
1192  *    xform [O] The xform.
1193  *
1194  */
1195 BOOL WINAPI GetTransform( HDC hdc, DWORD which, XFORM *xform )
1196 {
1197     BOOL ret = TRUE;
1198     DC *dc = get_dc_ptr( hdc );
1199     if (!dc) return FALSE;
1200
1201     switch(which)
1202     {
1203     case 0x203:
1204         *xform = dc->xformWorld2Wnd;
1205         break;
1206
1207     case 0x304:
1208         construct_window_to_viewport(dc, xform);
1209         break;
1210
1211     case 0x204:
1212         *xform = dc->xformWorld2Vport;
1213         break;
1214
1215     case 0x402:
1216         *xform = dc->xformVport2World;
1217         break;
1218
1219     default:
1220         FIXME("Unknown code %x\n", which);
1221         ret = FALSE;
1222     }
1223
1224     release_dc_ptr( dc );
1225     return ret;
1226 }
1227
1228
1229 /***********************************************************************
1230  *           SetWorldTransform    (GDI32.@)
1231  */
1232 BOOL WINAPI SetWorldTransform( HDC hdc, const XFORM *xform )
1233 {
1234     BOOL ret = FALSE;
1235     DC *dc;
1236
1237     if (!xform) return FALSE;
1238
1239     dc = get_dc_ptr( hdc );
1240     if (!dc) return FALSE;
1241
1242     /* Check that graphics mode is GM_ADVANCED */
1243     if (dc->GraphicsMode!=GM_ADVANCED) goto done;
1244
1245     TRACE("eM11 %f eM12 %f eM21 %f eM22 %f eDx %f eDy %f\n",
1246         xform->eM11, xform->eM12, xform->eM21, xform->eM22, xform->eDx, xform->eDy);
1247
1248     /* The transform must conform to (eM11 * eM22 != eM12 * eM21) requirement */
1249     if (xform->eM11 * xform->eM22 == xform->eM12 * xform->eM21) goto done;
1250
1251     if (dc->funcs->pSetWorldTransform)
1252     {
1253         ret = dc->funcs->pSetWorldTransform(dc->physDev, xform);
1254         if (!ret) goto done;
1255     }
1256
1257     dc->xformWorld2Wnd = *xform;
1258     DC_UpdateXforms( dc );
1259     ret = TRUE;
1260  done:
1261     release_dc_ptr( dc );
1262     return ret;
1263 }
1264
1265
1266 /****************************************************************************
1267  * ModifyWorldTransform [GDI32.@]
1268  * Modifies the world transformation for a device context.
1269  *
1270  * PARAMS
1271  *    hdc   [I] Handle to device context
1272  *    xform [I] XFORM structure that will be used to modify the world
1273  *              transformation
1274  *    iMode [I] Specifies in what way to modify the world transformation
1275  *              Possible values:
1276  *              MWT_IDENTITY
1277  *                 Resets the world transformation to the identity matrix.
1278  *                 The parameter xform is ignored.
1279  *              MWT_LEFTMULTIPLY
1280  *                 Multiplies xform into the world transformation matrix from
1281  *                 the left.
1282  *              MWT_RIGHTMULTIPLY
1283  *                 Multiplies xform into the world transformation matrix from
1284  *                 the right.
1285  *
1286  * RETURNS
1287  *  Success: TRUE.
1288  *  Failure: FALSE. Use GetLastError() to determine the cause.
1289  */
1290 BOOL WINAPI ModifyWorldTransform( HDC hdc, const XFORM *xform,
1291     DWORD iMode )
1292 {
1293     BOOL ret = FALSE;
1294     DC *dc = get_dc_ptr( hdc );
1295
1296     /* Check for illegal parameters */
1297     if (!dc) return FALSE;
1298     if (!xform && iMode != MWT_IDENTITY) goto done;
1299
1300     /* Check that graphics mode is GM_ADVANCED */
1301     if (dc->GraphicsMode!=GM_ADVANCED) goto done;
1302
1303     if (dc->funcs->pModifyWorldTransform)
1304     {
1305         ret = dc->funcs->pModifyWorldTransform(dc->physDev, xform, iMode);
1306         if (!ret) goto done;
1307     }
1308
1309     switch (iMode)
1310     {
1311         case MWT_IDENTITY:
1312             dc->xformWorld2Wnd.eM11 = 1.0f;
1313             dc->xformWorld2Wnd.eM12 = 0.0f;
1314             dc->xformWorld2Wnd.eM21 = 0.0f;
1315             dc->xformWorld2Wnd.eM22 = 1.0f;
1316             dc->xformWorld2Wnd.eDx  = 0.0f;
1317             dc->xformWorld2Wnd.eDy  = 0.0f;
1318             break;
1319         case MWT_LEFTMULTIPLY:
1320             CombineTransform( &dc->xformWorld2Wnd, xform,
1321                 &dc->xformWorld2Wnd );
1322             break;
1323         case MWT_RIGHTMULTIPLY:
1324             CombineTransform( &dc->xformWorld2Wnd, &dc->xformWorld2Wnd,
1325                 xform );
1326             break;
1327         default:
1328             goto done;
1329     }
1330
1331     DC_UpdateXforms( dc );
1332     ret = TRUE;
1333  done:
1334     release_dc_ptr( dc );
1335     return ret;
1336 }
1337
1338
1339 /****************************************************************************
1340  * CombineTransform [GDI32.@]
1341  * Combines two transformation matrices.
1342  *
1343  * PARAMS
1344  *    xformResult [O] Stores the result of combining the two matrices
1345  *    xform1      [I] Specifies the first matrix to apply
1346  *    xform2      [I] Specifies the second matrix to apply
1347  *
1348  * REMARKS
1349  *    The same matrix can be passed in for more than one of the parameters.
1350  *
1351  * RETURNS
1352  *  Success: TRUE.
1353  *  Failure: FALSE. Use GetLastError() to determine the cause.
1354  */
1355 BOOL WINAPI CombineTransform( LPXFORM xformResult, const XFORM *xform1,
1356     const XFORM *xform2 )
1357 {
1358     XFORM xformTemp;
1359
1360     /* Check for illegal parameters */
1361     if (!xformResult || !xform1 || !xform2)
1362         return FALSE;
1363
1364     /* Create the result in a temporary XFORM, since xformResult may be
1365      * equal to xform1 or xform2 */
1366     xformTemp.eM11 = xform1->eM11 * xform2->eM11 +
1367                      xform1->eM12 * xform2->eM21;
1368     xformTemp.eM12 = xform1->eM11 * xform2->eM12 +
1369                      xform1->eM12 * xform2->eM22;
1370     xformTemp.eM21 = xform1->eM21 * xform2->eM11 +
1371                      xform1->eM22 * xform2->eM21;
1372     xformTemp.eM22 = xform1->eM21 * xform2->eM12 +
1373                      xform1->eM22 * xform2->eM22;
1374     xformTemp.eDx  = xform1->eDx  * xform2->eM11 +
1375                      xform1->eDy  * xform2->eM21 +
1376                      xform2->eDx;
1377     xformTemp.eDy  = xform1->eDx  * xform2->eM12 +
1378                      xform1->eDy  * xform2->eM22 +
1379                      xform2->eDy;
1380
1381     /* Copy the result to xformResult */
1382     *xformResult = xformTemp;
1383
1384     return TRUE;
1385 }
1386
1387
1388 /***********************************************************************
1389  *           SetDCHook   (GDI32.@)
1390  *
1391  * Note: this doesn't exist in Win32, we add it here because user32 needs it.
1392  */
1393 BOOL WINAPI SetDCHook( HDC hdc, DCHOOKPROC hookProc, DWORD_PTR dwHookData )
1394 {
1395     DC *dc = get_dc_ptr( hdc );
1396
1397     if (!dc) return FALSE;
1398
1399     if (!(dc->flags & DC_SAVED))
1400     {
1401         dc->dwHookData = dwHookData;
1402         dc->hookProc = hookProc;
1403     }
1404     release_dc_ptr( dc );
1405     return TRUE;
1406 }
1407
1408
1409 /***********************************************************************
1410  *           GetDCHook   (GDI32.@)
1411  *
1412  * Note: this doesn't exist in Win32, we add it here because user32 needs it.
1413  */
1414 DWORD_PTR WINAPI GetDCHook( HDC hdc, DCHOOKPROC *proc )
1415 {
1416     DC *dc = get_dc_ptr( hdc );
1417     DWORD_PTR ret;
1418
1419     if (!dc) return 0;
1420     if (proc) *proc = dc->hookProc;
1421     ret = dc->dwHookData;
1422     release_dc_ptr( dc );
1423     return ret;
1424 }
1425
1426
1427 /***********************************************************************
1428  *           SetHookFlags   (GDI32.@)
1429  *
1430  * Note: this doesn't exist in Win32, we add it here because user32 needs it.
1431  */
1432 WORD WINAPI SetHookFlags( HDC hdc, WORD flags )
1433 {
1434     DC *dc = get_dc_obj( hdc );  /* not get_dc_ptr, this needs to work from any thread */
1435     LONG ret = 0;
1436
1437     if (!dc) return 0;
1438
1439     /* "Undocumented Windows" info is slightly confusing. */
1440
1441     TRACE("hDC %p, flags %04x\n",hdc,flags);
1442
1443     if (flags & DCHF_INVALIDATEVISRGN)
1444         ret = InterlockedExchange( &dc->dirty, 1 );
1445     else if (flags & DCHF_VALIDATEVISRGN || !flags)
1446         ret = InterlockedExchange( &dc->dirty, 0 );
1447
1448     GDI_ReleaseObj( hdc );
1449     return ret;
1450 }
1451
1452 /***********************************************************************
1453  *           SetICMMode    (GDI32.@)
1454  */
1455 INT WINAPI SetICMMode(HDC hdc, INT iEnableICM)
1456 {
1457 /*FIXME:  Assume that ICM is always off, and cannot be turned on */
1458     if (iEnableICM == ICM_OFF) return ICM_OFF;
1459     if (iEnableICM == ICM_ON) return 0;
1460     if (iEnableICM == ICM_QUERY) return ICM_OFF;
1461     return 0;
1462 }
1463
1464 /***********************************************************************
1465  *           GetDeviceGammaRamp    (GDI32.@)
1466  */
1467 BOOL WINAPI GetDeviceGammaRamp(HDC hDC, LPVOID ptr)
1468 {
1469     BOOL ret = FALSE;
1470     DC *dc = get_dc_ptr( hDC );
1471
1472     if( dc )
1473     {
1474         if (dc->funcs->pGetDeviceGammaRamp)
1475             ret = dc->funcs->pGetDeviceGammaRamp(dc->physDev, ptr);
1476         release_dc_ptr( dc );
1477     }
1478     return ret;
1479 }
1480
1481 /***********************************************************************
1482  *           SetDeviceGammaRamp    (GDI32.@)
1483  */
1484 BOOL WINAPI SetDeviceGammaRamp(HDC hDC, LPVOID ptr)
1485 {
1486     BOOL ret = FALSE;
1487     DC *dc = get_dc_ptr( hDC );
1488
1489     if( dc )
1490     {
1491         if (dc->funcs->pSetDeviceGammaRamp)
1492             ret = dc->funcs->pSetDeviceGammaRamp(dc->physDev, ptr);
1493         release_dc_ptr( dc );
1494     }
1495     return ret;
1496 }
1497
1498 /***********************************************************************
1499  *           GetColorSpace    (GDI32.@)
1500  */
1501 HCOLORSPACE WINAPI GetColorSpace(HDC hdc)
1502 {
1503 /*FIXME    Need to to whatever GetColorSpace actually does */
1504     return 0;
1505 }
1506
1507 /***********************************************************************
1508  *           CreateColorSpaceA    (GDI32.@)
1509  */
1510 HCOLORSPACE WINAPI CreateColorSpaceA( LPLOGCOLORSPACEA lpLogColorSpace )
1511 {
1512   FIXME( "stub\n" );
1513   return 0;
1514 }
1515
1516 /***********************************************************************
1517  *           CreateColorSpaceW    (GDI32.@)
1518  */
1519 HCOLORSPACE WINAPI CreateColorSpaceW( LPLOGCOLORSPACEW lpLogColorSpace )
1520 {
1521   FIXME( "stub\n" );
1522   return 0;
1523 }
1524
1525 /***********************************************************************
1526  *           DeleteColorSpace     (GDI32.@)
1527  */
1528 BOOL WINAPI DeleteColorSpace( HCOLORSPACE hColorSpace )
1529 {
1530   FIXME( "stub\n" );
1531
1532   return TRUE;
1533 }
1534
1535 /***********************************************************************
1536  *           SetColorSpace     (GDI32.@)
1537  */
1538 HCOLORSPACE WINAPI SetColorSpace( HDC hDC, HCOLORSPACE hColorSpace )
1539 {
1540   FIXME( "stub\n" );
1541
1542   return hColorSpace;
1543 }
1544
1545 /***********************************************************************
1546  *           GetBoundsRect    (GDI32.@)
1547  */
1548 UINT WINAPI GetBoundsRect(HDC hdc, LPRECT rect, UINT flags)
1549 {
1550     UINT ret;
1551     DC *dc = get_dc_ptr( hdc );
1552
1553     if ( !dc ) return 0;
1554
1555     if (rect)
1556     {
1557         *rect = dc->BoundsRect;
1558         ret = ((dc->flags & DC_BOUNDS_SET) ? DCB_SET : DCB_RESET);
1559     }
1560     else
1561         ret = 0;
1562
1563     if (flags & DCB_RESET)
1564     {
1565         dc->BoundsRect.left   = 0;
1566         dc->BoundsRect.top    = 0;
1567         dc->BoundsRect.right  = 0;
1568         dc->BoundsRect.bottom = 0;
1569         dc->flags &= ~DC_BOUNDS_SET;
1570     }
1571     release_dc_ptr( dc );
1572     return ret;
1573 }
1574
1575
1576 /***********************************************************************
1577  *           SetBoundsRect    (GDI32.@)
1578  */
1579 UINT WINAPI SetBoundsRect(HDC hdc, const RECT* rect, UINT flags)
1580 {
1581     UINT ret;
1582     DC *dc;
1583
1584     if ((flags & DCB_ENABLE) && (flags & DCB_DISABLE)) return 0;
1585     if (!(dc = get_dc_ptr( hdc ))) return 0;
1586
1587     ret = ((dc->flags & DC_BOUNDS_ENABLE) ? DCB_ENABLE : DCB_DISABLE) |
1588           ((dc->flags & DC_BOUNDS_SET) ? DCB_SET : DCB_RESET);
1589
1590     if (flags & DCB_RESET)
1591     {
1592         dc->BoundsRect.left   = 0;
1593         dc->BoundsRect.top    = 0;
1594         dc->BoundsRect.right  = 0;
1595         dc->BoundsRect.bottom = 0;
1596         dc->flags &= ~DC_BOUNDS_SET;
1597     }
1598
1599     if ((flags & DCB_ACCUMULATE) && rect && rect->left < rect->right && rect->top < rect->bottom)
1600     {
1601         if (dc->flags & DC_BOUNDS_SET)
1602         {
1603             dc->BoundsRect.left   = min( dc->BoundsRect.left, rect->left );
1604             dc->BoundsRect.top    = min( dc->BoundsRect.top, rect->top );
1605             dc->BoundsRect.right  = max( dc->BoundsRect.right, rect->right );
1606             dc->BoundsRect.bottom = max( dc->BoundsRect.bottom, rect->bottom );
1607         }
1608         else
1609         {
1610             dc->BoundsRect = *rect;
1611             dc->flags |= DC_BOUNDS_SET;
1612         }
1613     }
1614
1615     if (flags & DCB_ENABLE) dc->flags |= DC_BOUNDS_ENABLE;
1616     if (flags & DCB_DISABLE) dc->flags &= ~DC_BOUNDS_ENABLE;
1617
1618     release_dc_ptr( dc );
1619     return ret;
1620 }
1621
1622
1623 /***********************************************************************
1624  *              GetRelAbs               (GDI32.@)
1625  */
1626 INT WINAPI GetRelAbs( HDC hdc, DWORD dwIgnore )
1627 {
1628     INT ret = 0;
1629     DC *dc = get_dc_ptr( hdc );
1630     if (dc)
1631     {
1632         ret = dc->relAbsMode;
1633         release_dc_ptr( dc );
1634     }
1635     return ret;
1636 }
1637
1638
1639
1640
1641 /***********************************************************************
1642  *              GetBkMode (GDI32.@)
1643  */
1644 INT WINAPI GetBkMode( HDC hdc )
1645 {
1646     INT ret = 0;
1647     DC * dc = get_dc_ptr( hdc );
1648     if (dc)
1649     {
1650         ret = dc->backgroundMode;
1651         release_dc_ptr( dc );
1652     }
1653     return ret;
1654 }
1655
1656
1657 /***********************************************************************
1658  *              SetBkMode (GDI32.@)
1659  */
1660 INT WINAPI SetBkMode( HDC hdc, INT mode )
1661 {
1662     INT ret;
1663     DC *dc;
1664     if ((mode <= 0) || (mode > BKMODE_LAST))
1665     {
1666         SetLastError(ERROR_INVALID_PARAMETER);
1667         return 0;
1668     }
1669     if (!(dc = get_dc_ptr( hdc ))) return 0;
1670
1671     ret = dc->backgroundMode;
1672     if (dc->funcs->pSetBkMode)
1673         if (!dc->funcs->pSetBkMode( dc->physDev, mode ))
1674             ret = 0;
1675     if (ret)
1676         dc->backgroundMode = mode;
1677     release_dc_ptr( dc );
1678     return ret;
1679 }
1680
1681
1682 /***********************************************************************
1683  *              GetROP2 (GDI32.@)
1684  */
1685 INT WINAPI GetROP2( HDC hdc )
1686 {
1687     INT ret = 0;
1688     DC * dc = get_dc_ptr( hdc );
1689     if (dc)
1690     {
1691         ret = dc->ROPmode;
1692         release_dc_ptr( dc );
1693     }
1694     return ret;
1695 }
1696
1697
1698 /***********************************************************************
1699  *              SetROP2 (GDI32.@)
1700  */
1701 INT WINAPI SetROP2( HDC hdc, INT mode )
1702 {
1703     INT ret;
1704     DC *dc;
1705     if ((mode < R2_BLACK) || (mode > R2_WHITE))
1706     {
1707         SetLastError(ERROR_INVALID_PARAMETER);
1708         return 0;
1709     }
1710     if (!(dc = get_dc_ptr( hdc ))) return 0;
1711     ret = dc->ROPmode;
1712     if (dc->funcs->pSetROP2)
1713         if (!dc->funcs->pSetROP2( dc->physDev, mode ))
1714             ret = 0;
1715     if (ret)
1716         dc->ROPmode = mode;
1717     release_dc_ptr( dc );
1718     return ret;
1719 }
1720
1721
1722 /***********************************************************************
1723  *              SetRelAbs (GDI32.@)
1724  */
1725 INT WINAPI SetRelAbs( HDC hdc, INT mode )
1726 {
1727     INT ret;
1728     DC *dc;
1729     if ((mode != ABSOLUTE) && (mode != RELATIVE))
1730     {
1731         SetLastError(ERROR_INVALID_PARAMETER);
1732         return 0;
1733     }
1734     if (!(dc = get_dc_ptr( hdc ))) return 0;
1735     if (dc->funcs->pSetRelAbs)
1736         ret = dc->funcs->pSetRelAbs( dc->physDev, mode );
1737     else
1738     {
1739         ret = dc->relAbsMode;
1740         dc->relAbsMode = mode;
1741     }
1742     release_dc_ptr( dc );
1743     return ret;
1744 }
1745
1746
1747 /***********************************************************************
1748  *              GetPolyFillMode (GDI32.@)
1749  */
1750 INT WINAPI GetPolyFillMode( HDC hdc )
1751 {
1752     INT ret = 0;
1753     DC * dc = get_dc_ptr( hdc );
1754     if (dc)
1755     {
1756         ret = dc->polyFillMode;
1757         release_dc_ptr( dc );
1758     }
1759     return ret;
1760 }
1761
1762
1763 /***********************************************************************
1764  *              SetPolyFillMode (GDI32.@)
1765  */
1766 INT WINAPI SetPolyFillMode( HDC hdc, INT mode )
1767 {
1768     INT ret;
1769     DC *dc;
1770     if ((mode <= 0) || (mode > POLYFILL_LAST))
1771     {
1772         SetLastError(ERROR_INVALID_PARAMETER);
1773         return 0;
1774     }
1775     if (!(dc = get_dc_ptr( hdc ))) return 0;
1776     ret = dc->polyFillMode;
1777     if (dc->funcs->pSetPolyFillMode)
1778         if (!dc->funcs->pSetPolyFillMode( dc->physDev, mode ))
1779             ret = 0;
1780     if (ret)
1781         dc->polyFillMode = mode;
1782     release_dc_ptr( dc );
1783     return ret;
1784 }
1785
1786
1787 /***********************************************************************
1788  *              GetStretchBltMode (GDI32.@)
1789  */
1790 INT WINAPI GetStretchBltMode( HDC hdc )
1791 {
1792     INT ret = 0;
1793     DC * dc = get_dc_ptr( hdc );
1794     if (dc)
1795     {
1796         ret = dc->stretchBltMode;
1797         release_dc_ptr( dc );
1798     }
1799     return ret;
1800 }
1801
1802
1803 /***********************************************************************
1804  *              SetStretchBltMode (GDI32.@)
1805  */
1806 INT WINAPI SetStretchBltMode( HDC hdc, INT mode )
1807 {
1808     INT ret;
1809     DC *dc;
1810     if ((mode <= 0) || (mode > MAXSTRETCHBLTMODE))
1811     {
1812         SetLastError(ERROR_INVALID_PARAMETER);
1813         return 0;
1814     }
1815     if (!(dc = get_dc_ptr( hdc ))) return 0;
1816     ret = dc->stretchBltMode;
1817     if (dc->funcs->pSetStretchBltMode)
1818         if (!dc->funcs->pSetStretchBltMode( dc->physDev, mode ))
1819             ret = 0;
1820     if (ret)
1821         dc->stretchBltMode = mode;
1822     release_dc_ptr( dc );
1823     return ret;
1824 }
1825
1826
1827 /***********************************************************************
1828  *              GetMapMode (GDI32.@)
1829  */
1830 INT WINAPI GetMapMode( HDC hdc )
1831 {
1832     INT ret = 0;
1833     DC * dc = get_dc_ptr( hdc );
1834     if (dc)
1835     {
1836         ret = dc->MapMode;
1837         release_dc_ptr( dc );
1838     }
1839     return ret;
1840 }
1841
1842
1843 /***********************************************************************
1844  *              GetBrushOrgEx (GDI32.@)
1845  */
1846 BOOL WINAPI GetBrushOrgEx( HDC hdc, LPPOINT pt )
1847 {
1848     DC * dc = get_dc_ptr( hdc );
1849     if (!dc) return FALSE;
1850     pt->x = dc->brushOrgX;
1851     pt->y = dc->brushOrgY;
1852     release_dc_ptr( dc );
1853     return TRUE;
1854 }
1855
1856
1857 /***********************************************************************
1858  *              GetCurrentPositionEx (GDI32.@)
1859  */
1860 BOOL WINAPI GetCurrentPositionEx( HDC hdc, LPPOINT pt )
1861 {
1862     DC * dc = get_dc_ptr( hdc );
1863     if (!dc) return FALSE;
1864     pt->x = dc->CursPosX;
1865     pt->y = dc->CursPosY;
1866     release_dc_ptr( dc );
1867     return TRUE;
1868 }
1869
1870
1871 /***********************************************************************
1872  *              GetViewportExtEx (GDI32.@)
1873  */
1874 BOOL WINAPI GetViewportExtEx( HDC hdc, LPSIZE size )
1875 {
1876     DC * dc = get_dc_ptr( hdc );
1877     if (!dc) return FALSE;
1878     size->cx = dc->vportExtX;
1879     size->cy = dc->vportExtY;
1880     release_dc_ptr( dc );
1881     return TRUE;
1882 }
1883
1884
1885 /***********************************************************************
1886  *              GetViewportOrgEx (GDI32.@)
1887  */
1888 BOOL WINAPI GetViewportOrgEx( HDC hdc, LPPOINT pt )
1889 {
1890     DC * dc = get_dc_ptr( hdc );
1891     if (!dc) return FALSE;
1892     pt->x = dc->vportOrgX;
1893     pt->y = dc->vportOrgY;
1894     release_dc_ptr( dc );
1895     return TRUE;
1896 }
1897
1898
1899 /***********************************************************************
1900  *              GetWindowExtEx (GDI32.@)
1901  */
1902 BOOL WINAPI GetWindowExtEx( HDC hdc, LPSIZE size )
1903 {
1904     DC * dc = get_dc_ptr( hdc );
1905     if (!dc) return FALSE;
1906     size->cx = dc->wndExtX;
1907     size->cy = dc->wndExtY;
1908     release_dc_ptr( dc );
1909     return TRUE;
1910 }
1911
1912
1913 /***********************************************************************
1914  *              GetWindowOrgEx (GDI32.@)
1915  */
1916 BOOL WINAPI GetWindowOrgEx( HDC hdc, LPPOINT pt )
1917 {
1918     DC * dc = get_dc_ptr( hdc );
1919     if (!dc) return FALSE;
1920     pt->x = dc->wndOrgX;
1921     pt->y = dc->wndOrgY;
1922     release_dc_ptr( dc );
1923     return TRUE;
1924 }
1925
1926
1927 /***********************************************************************
1928  *           GetLayout    (GDI32.@)
1929  *
1930  * Gets left->right or right->left text layout flags of a dc.
1931  *
1932  */
1933 DWORD WINAPI GetLayout(HDC hdc)
1934 {
1935     DWORD layout = GDI_ERROR;
1936
1937     DC * dc = get_dc_ptr( hdc );
1938     if (dc)
1939     {
1940         layout = dc->layout;
1941         release_dc_ptr( dc );
1942     }
1943
1944     TRACE("hdc : %p, layout : %08x\n", hdc, layout);
1945
1946     return layout;
1947 }
1948
1949 /***********************************************************************
1950  *           SetLayout    (GDI32.@)
1951  *
1952  * Sets left->right or right->left text layout flags of a dc.
1953  *
1954  */
1955 DWORD WINAPI SetLayout(HDC hdc, DWORD layout)
1956 {
1957     DWORD oldlayout = GDI_ERROR;
1958
1959     DC * dc = get_dc_ptr( hdc );
1960     if (dc)
1961     {
1962         oldlayout = dc->layout;
1963         dc->layout = layout;
1964         if (layout != oldlayout)
1965         {
1966             if (layout & LAYOUT_RTL) dc->MapMode = MM_ANISOTROPIC;
1967             DC_UpdateXforms( dc );
1968         }
1969         release_dc_ptr( dc );
1970     }
1971
1972     TRACE("hdc : %p, old layout : %08x, new layout : %08x\n", hdc, oldlayout, layout);
1973
1974     return oldlayout;
1975 }
1976
1977 /***********************************************************************
1978  *           GetDCBrushColor    (GDI32.@)
1979  *
1980  * Retrieves the current brush color for the specified device
1981  * context (DC).
1982  *
1983  */
1984 COLORREF WINAPI GetDCBrushColor(HDC hdc)
1985 {
1986     DC *dc;
1987     COLORREF dcBrushColor = CLR_INVALID;
1988
1989     TRACE("hdc(%p)\n", hdc);
1990
1991     dc = get_dc_ptr( hdc );
1992     if (dc)
1993     {
1994         dcBrushColor = dc->dcBrushColor;
1995         release_dc_ptr( dc );
1996     }
1997
1998     return dcBrushColor;
1999 }
2000
2001 /***********************************************************************
2002  *           SetDCBrushColor    (GDI32.@)
2003  *
2004  * Sets the current device context (DC) brush color to the specified
2005  * color value. If the device cannot represent the specified color
2006  * value, the color is set to the nearest physical color.
2007  *
2008  */
2009 COLORREF WINAPI SetDCBrushColor(HDC hdc, COLORREF crColor)
2010 {
2011     DC *dc;
2012     COLORREF oldClr = CLR_INVALID;
2013
2014     TRACE("hdc(%p) crColor(%08x)\n", hdc, crColor);
2015
2016     dc = get_dc_ptr( hdc );
2017     if (dc)
2018     {
2019         if (dc->funcs->pSetDCBrushColor)
2020             crColor = dc->funcs->pSetDCBrushColor( dc->physDev, crColor );
2021         else if (dc->hBrush == GetStockObject( DC_BRUSH ))
2022         {
2023             /* If DC_BRUSH is selected, update driver pen color */
2024             HBRUSH hBrush = CreateSolidBrush( crColor );
2025             dc->funcs->pSelectBrush( dc->physDev, hBrush );
2026             DeleteObject( hBrush );
2027         }
2028
2029         if (crColor != CLR_INVALID)
2030         {
2031             oldClr = dc->dcBrushColor;
2032             dc->dcBrushColor = crColor;
2033         }
2034
2035         release_dc_ptr( dc );
2036     }
2037
2038     return oldClr;
2039 }
2040
2041 /***********************************************************************
2042  *           GetDCPenColor    (GDI32.@)
2043  *
2044  * Retrieves the current pen color for the specified device
2045  * context (DC).
2046  *
2047  */
2048 COLORREF WINAPI GetDCPenColor(HDC hdc)
2049 {
2050     DC *dc;
2051     COLORREF dcPenColor = CLR_INVALID;
2052
2053     TRACE("hdc(%p)\n", hdc);
2054
2055     dc = get_dc_ptr( hdc );
2056     if (dc)
2057     {
2058         dcPenColor = dc->dcPenColor;
2059         release_dc_ptr( dc );
2060     }
2061
2062     return dcPenColor;
2063 }
2064
2065 /***********************************************************************
2066  *           SetDCPenColor    (GDI32.@)
2067  *
2068  * Sets the current device context (DC) pen color to the specified
2069  * color value. If the device cannot represent the specified color
2070  * value, the color is set to the nearest physical color.
2071  *
2072  */
2073 COLORREF WINAPI SetDCPenColor(HDC hdc, COLORREF crColor)
2074 {
2075     DC *dc;
2076     COLORREF oldClr = CLR_INVALID;
2077
2078     TRACE("hdc(%p) crColor(%08x)\n", hdc, crColor);
2079
2080     dc = get_dc_ptr( hdc );
2081     if (dc)
2082     {
2083         if (dc->funcs->pSetDCPenColor)
2084             crColor = dc->funcs->pSetDCPenColor( dc->physDev, crColor );
2085         else if (dc->hPen == GetStockObject( DC_PEN ))
2086         {
2087             /* If DC_PEN is selected, update the driver pen color */
2088             LOGPEN logpen = { PS_SOLID, { 0, 0 }, crColor };
2089             HPEN hPen = CreatePenIndirect( &logpen );
2090             dc->funcs->pSelectPen( dc->physDev, hPen );
2091             DeleteObject( hPen );
2092         }
2093
2094         if (crColor != CLR_INVALID)
2095         {
2096             oldClr = dc->dcPenColor;
2097             dc->dcPenColor = crColor;
2098         }
2099
2100         release_dc_ptr( dc );
2101     }
2102
2103     return oldClr;
2104 }
2105
2106 /***********************************************************************
2107  *           CancelDC    (GDI32.@)
2108  */
2109 BOOL WINAPI CancelDC(HDC hdc)
2110 {
2111     FIXME("stub\n");
2112     return TRUE;
2113 }
2114
2115 /*******************************************************************
2116  *      GetMiterLimit [GDI32.@]
2117  *
2118  *
2119  */
2120 BOOL WINAPI GetMiterLimit(HDC hdc, PFLOAT peLimit)
2121 {
2122     BOOL bRet = FALSE;
2123     DC *dc;
2124
2125     TRACE("(%p,%p)\n", hdc, peLimit);
2126
2127     dc = get_dc_ptr( hdc );
2128     if (dc)
2129     {
2130         if (peLimit)
2131             *peLimit = dc->miterLimit;
2132
2133         release_dc_ptr( dc );
2134         bRet = TRUE;
2135     }
2136     return bRet;
2137 }
2138
2139 /*******************************************************************
2140  *      SetMiterLimit [GDI32.@]
2141  *
2142  *
2143  */
2144 BOOL WINAPI SetMiterLimit(HDC hdc, FLOAT eNewLimit, PFLOAT peOldLimit)
2145 {
2146     BOOL bRet = FALSE;
2147     DC *dc;
2148
2149     TRACE("(%p,%f,%p)\n", hdc, eNewLimit, peOldLimit);
2150
2151     dc = get_dc_ptr( hdc );
2152     if (dc)
2153     {
2154         if (peOldLimit)
2155             *peOldLimit = dc->miterLimit;
2156         dc->miterLimit = eNewLimit;
2157         release_dc_ptr( dc );
2158         bRet = TRUE;
2159     }
2160     return bRet;
2161 }
2162
2163 /*******************************************************************
2164  *      GdiIsMetaPrintDC [GDI32.@]
2165  */
2166 BOOL WINAPI GdiIsMetaPrintDC(HDC hdc)
2167 {
2168     FIXME("%p\n", hdc);
2169     return FALSE;
2170 }
2171
2172 /*******************************************************************
2173  *      GdiIsMetaFileDC [GDI32.@]
2174  */
2175 BOOL WINAPI GdiIsMetaFileDC(HDC hdc)
2176 {
2177     TRACE("%p\n", hdc);
2178
2179     switch( GetObjectType( hdc ) )
2180     {
2181     case OBJ_METADC:
2182     case OBJ_ENHMETADC:
2183         return TRUE;
2184     }
2185     return FALSE;
2186 }
2187
2188 /*******************************************************************
2189  *      GdiIsPlayMetafileDC [GDI32.@]
2190  */
2191 BOOL WINAPI GdiIsPlayMetafileDC(HDC hdc)
2192 {
2193     FIXME("%p\n", hdc);
2194     return FALSE;
2195 }