objects/dc.c

   1 /*
   2  * GDI Device Context functions
   3  *
   4  * Copyright 1993 Alexandre Julliard
   5  *
   6  */
   7
   8 #include "config.h"
   9
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include "dc.h"
  13 #include "gdi.h"
  14 #include "heap.h"
  15 #include "debugtools.h"
  16 #include "font.h"
  17 #include "callback.h"
  18 #include "winerror.h"
  19 #include "windef.h"
  20 #include "wingdi.h"
  21 #include "wine/winuser16.h"
  22
  23 DEFAULT_DEBUG_CHANNEL(dc);
  24
  25 /***********************************************************************
  26  *           DC_Init_DC_INFO
  27  *
  28  * Fill the WIN_DC_INFO structure.
  29  */
  30 static void DC_Init_DC_INFO( WIN_DC_INFO *win_dc_info )
  31 {
  32     win_dc_info->flags               = 0;
  33     win_dc_info->devCaps             = NULL;
  34     win_dc_info->hClipRgn            = 0;
  35     win_dc_info->hVisRgn             = 0;
  36     win_dc_info->hGCClipRgn          = 0;
  37     win_dc_info->hPen                = STOCK_BLACK_PEN;
  38     win_dc_info->hBrush              = STOCK_WHITE_BRUSH;
  39     win_dc_info->hFont               = STOCK_SYSTEM_FONT;
  40     win_dc_info->hBitmap             = 0;
  41     win_dc_info->hDevice             = 0;
  42     win_dc_info->hPalette            = STOCK_DEFAULT_PALETTE;
  43     win_dc_info->ROPmode             = R2_COPYPEN;
  44     win_dc_info->polyFillMode        = ALTERNATE;
  45     win_dc_info->stretchBltMode      = BLACKONWHITE;
  46     win_dc_info->relAbsMode          = ABSOLUTE;
  47     win_dc_info->backgroundMode      = OPAQUE;
  48     win_dc_info->backgroundColor     = RGB( 255, 255, 255 );
  49     win_dc_info->textColor           = RGB( 0, 0, 0 );
  50     win_dc_info->brushOrgX           = 0;
  51     win_dc_info->brushOrgY           = 0;
  52     win_dc_info->textAlign           = TA_LEFT | TA_TOP | TA_NOUPDATECP;
  53     win_dc_info->charExtra           = 0;
  54     win_dc_info->breakTotalExtra     = 0;
  55     win_dc_info->breakCount          = 0;
  56     win_dc_info->breakExtra          = 0;
  57     win_dc_info->breakRem            = 0;
  58     win_dc_info->bitsPerPixel        = 1;
  59     win_dc_info->MapMode             = MM_TEXT;
  60     win_dc_info->GraphicsMode        = GM_COMPATIBLE;
  61     win_dc_info->DCOrgX              = 0;
  62     win_dc_info->DCOrgY              = 0;
  63     win_dc_info->pAbortProc          = NULL;
  64     win_dc_info->CursPosX            = 0;
  65     win_dc_info->CursPosY            = 0;
  66     win_dc_info->ArcDirection        = AD_COUNTERCLOCKWISE;
  67     win_dc_info->xformWorld2Wnd.eM11 = 1.0f;
  68     win_dc_info->xformWorld2Wnd.eM12 = 0.0f;
  69     win_dc_info->xformWorld2Wnd.eM21 = 0.0f;
  70     win_dc_info->xformWorld2Wnd.eM22 = 1.0f;
  71     win_dc_info->xformWorld2Wnd.eDx  = 0.0f;
  72     win_dc_info->xformWorld2Wnd.eDy  = 0.0f;
  73     win_dc_info->xformWorld2Vport    = win_dc_info->xformWorld2Wnd;
  74     win_dc_info->xformVport2World    = win_dc_info->xformWorld2Wnd;
  75     win_dc_info->vport2WorldValid    = TRUE;
  76
  77     PATH_InitGdiPath(&win_dc_info->path);
  78 }
  79
  80
  81 /***********************************************************************
  82  *           DC_AllocDC
  83  */
  84 DC *DC_AllocDC( const DC_FUNCTIONS *funcs )
  85 {
  86     HDC hdc;
  87     DC *dc;
  88
  89     if (!(dc = GDI_AllocObject( sizeof(DC), DC_MAGIC, &hdc ))) return NULL;
  90     dc->hSelf      = hdc;
  91     dc->funcs      = funcs;
  92     dc->physDev    = NULL;
  93     dc->saveLevel  = 0;
  94     dc->dwHookData = 0L;
  95     dc->hookProc   = NULL;
  96     dc->hookThunk  = NULL;
  97     dc->wndOrgX    = 0;
  98     dc->wndOrgY    = 0;
  99     dc->wndExtX    = 1;
 100     dc->wndExtY    = 1;
 101     dc->vportOrgX  = 0;
 102     dc->vportOrgY  = 0;
 103     dc->vportExtX  = 1;
 104     dc->vportExtY  = 1;
 105
 106     DC_Init_DC_INFO( &dc->w );
 107
 108     return dc;
 109 }
 110
 111
 112
 113 /***********************************************************************
 114  *           DC_GetDCPtr
 115  */
 116 DC *DC_GetDCPtr( HDC hdc )
 117 {
 118     GDIOBJHDR *ptr = GDI_GetObjPtr( hdc, MAGIC_DONTCARE );
 119     if (!ptr) return NULL;
 120     if ((ptr->wMagic == DC_MAGIC) || (ptr->wMagic == METAFILE_DC_MAGIC) ||
 121         (ptr->wMagic == ENHMETAFILE_DC_MAGIC))
 122         return (DC *)ptr;
 123     GDI_ReleaseObj( hdc );
 124     SetLastError( ERROR_INVALID_HANDLE );
 125     return NULL;
 126 }
 127
 128 /***********************************************************************
 129  *           DC_GetDCUpdate
 130  *
 131  * Retrieve a DC ptr while making sure the visRgn is updated.
 132  * This function may call up to USER so the GDI lock should _not_
 133  * be held when calling it.
 134  */
 135 DC *DC_GetDCUpdate( HDC hdc )
 136 {
 137     DC *dc = DC_GetDCPtr( hdc );
 138     if (!dc) return NULL;
 139     while (dc->w.flags & DC_DIRTY)
 140     {
 141         dc->w.flags &= ~DC_DIRTY;
 142         if (!(dc->w.flags & (DC_SAVED | DC_MEMORY)))
 143         {
 144             DCHOOKPROC proc = dc->hookThunk;
 145             if (proc)
 146             {
 147                 DWORD data = dc->dwHookData;
 148                 GDI_ReleaseObj( hdc );
 149                 proc( hdc, DCHC_INVALIDVISRGN, data, 0 );
 150                 if (!(dc = DC_GetDCPtr( hdc ))) break;
 151                 /* otherwise restart the loop in case it became dirty again in the meantime */
 152             }
 153         }
 154     }
 155     return dc;
 156 }
 157
 158 /***********************************************************************
 159  *           DC_InitDC
 160  *
 161  * Setup device-specific DC values for a newly created DC.
 162  */
 163 void DC_InitDC( DC* dc )
 164 {
 165     RealizeDefaultPalette16( dc->hSelf );
 166     SetTextColor( dc->hSelf, dc->w.textColor );
 167     SetBkColor( dc->hSelf, dc->w.backgroundColor );
 168     SelectObject( dc->hSelf, dc->w.hPen );
 169     SelectObject( dc->hSelf, dc->w.hBrush );
 170     SelectObject( dc->hSelf, dc->w.hFont );
 171     CLIPPING_UpdateGCRegion( dc );
 172 }
 173
 174
 175 /***********************************************************************
 176  *           DC_InvertXform
 177  *
 178  * Computes the inverse of the transformation xformSrc and stores it to
 179  * xformDest. Returns TRUE if successful or FALSE if the xformSrc matrix
 180  * is singular.
 181  */
 182 static BOOL DC_InvertXform( const XFORM *xformSrc, XFORM *xformDest )
 183 {
 184     FLOAT determinant;
 185
 186     determinant = xformSrc->eM11*xformSrc->eM22 -
 187         xformSrc->eM12*xformSrc->eM21;
 188     if (determinant > -1e-12 && determinant < 1e-12)
 189         return FALSE;
 190
 191     xformDest->eM11 =  xformSrc->eM22 / determinant;
 192     xformDest->eM12 = -xformSrc->eM12 / determinant;
 193     xformDest->eM21 = -xformSrc->eM21 / determinant;
 194     xformDest->eM22 =  xformSrc->eM11 / determinant;
 195     xformDest->eDx  = -xformSrc->eDx * xformDest->eM11 -
 196                        xformSrc->eDy * xformDest->eM21;
 197     xformDest->eDy  = -xformSrc->eDx * xformDest->eM12 -
 198                        xformSrc->eDy * xformDest->eM22;
 199
 200     return TRUE;
 201 }
 202
 203
 204 /***********************************************************************
 205  *           DC_UpdateXforms
 206  *
 207  * Updates the xformWorld2Vport, xformVport2World and vport2WorldValid
 208  * fields of the specified DC by creating a transformation that
 209  * represents the current mapping mode and combining it with the DC's
 210  * world transform. This function should be called whenever the
 211  * parameters associated with the mapping mode (window and viewport
 212  * extents and origins) or the world transform change.
 213  */
 214 void DC_UpdateXforms( DC *dc )
 215 {
 216     XFORM xformWnd2Vport;
 217     FLOAT scaleX, scaleY;
 218
 219     /* Construct a transformation to do the window-to-viewport conversion */
 220     scaleX = (FLOAT)dc->vportExtX / (FLOAT)dc->wndExtX;
 221     scaleY = (FLOAT)dc->vportExtY / (FLOAT)dc->wndExtY;
 222     xformWnd2Vport.eM11 = scaleX;
 223     xformWnd2Vport.eM12 = 0.0;
 224     xformWnd2Vport.eM21 = 0.0;
 225     xformWnd2Vport.eM22 = scaleY;
 226     xformWnd2Vport.eDx  = (FLOAT)dc->vportOrgX -
 227         scaleX * (FLOAT)dc->wndOrgX;
 228     xformWnd2Vport.eDy  = (FLOAT)dc->vportOrgY -
 229         scaleY * (FLOAT)dc->wndOrgY;
 230
 231     /* Combine with the world transformation */
 232     CombineTransform( &dc->w.xformWorld2Vport, &dc->w.xformWorld2Wnd,
 233         &xformWnd2Vport );
 234
 235     /* Create inverse of world-to-viewport transformation */
 236     dc->w.vport2WorldValid = DC_InvertXform( &dc->w.xformWorld2Vport,
 237         &dc->w.xformVport2World );
 238 }
 239
 240
 241 /***********************************************************************
 242  *           GetDCState    (GDI.179)
 243  */
 244 HDC16 WINAPI GetDCState16( HDC16 hdc )
 245 {
 246     DC * newdc, * dc;
 247     HGDIOBJ handle;
 248
 249     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 250     if (!(newdc = GDI_AllocObject( sizeof(DC), DC_MAGIC, &handle )))
 251     {
 252       GDI_ReleaseObj( hdc );
 253       return 0;
 254     }
 255     TRACE("(%04x): returning %04x\n", hdc, handle );
 256
 257     newdc->w.flags            = dc->w.flags | DC_SAVED;
 258     newdc->w.devCaps          = dc->w.devCaps;
 259     newdc->w.hPen             = dc->w.hPen;
 260     newdc->w.hBrush           = dc->w.hBrush;
 261     newdc->w.hFont            = dc->w.hFont;
 262     newdc->w.hBitmap          = dc->w.hBitmap;
 263     newdc->w.hDevice          = dc->w.hDevice;
 264     newdc->w.hPalette         = dc->w.hPalette;
 265     newdc->w.totalExtent      = dc->w.totalExtent;
 266     newdc->w.bitsPerPixel     = dc->w.bitsPerPixel;
 267     newdc->w.ROPmode          = dc->w.ROPmode;
 268     newdc->w.polyFillMode     = dc->w.polyFillMode;
 269     newdc->w.stretchBltMode   = dc->w.stretchBltMode;
 270     newdc->w.relAbsMode       = dc->w.relAbsMode;
 271     newdc->w.backgroundMode   = dc->w.backgroundMode;
 272     newdc->w.backgroundColor  = dc->w.backgroundColor;
 273     newdc->w.textColor        = dc->w.textColor;
 274     newdc->w.brushOrgX        = dc->w.brushOrgX;
 275     newdc->w.brushOrgY        = dc->w.brushOrgY;
 276     newdc->w.textAlign        = dc->w.textAlign;
 277     newdc->w.charExtra        = dc->w.charExtra;
 278     newdc->w.breakTotalExtra  = dc->w.breakTotalExtra;
 279     newdc->w.breakCount       = dc->w.breakCount;
 280     newdc->w.breakExtra       = dc->w.breakExtra;
 281     newdc->w.breakRem         = dc->w.breakRem;
 282     newdc->w.MapMode          = dc->w.MapMode;
 283     newdc->w.GraphicsMode     = dc->w.GraphicsMode;
 284 #if 0
 285     /* Apparently, the DC origin is not changed by [GS]etDCState */
 286     newdc->w.DCOrgX           = dc->w.DCOrgX;
 287     newdc->w.DCOrgY           = dc->w.DCOrgY;
 288 #endif
 289     newdc->w.CursPosX         = dc->w.CursPosX;
 290     newdc->w.CursPosY         = dc->w.CursPosY;
 291     newdc->w.ArcDirection     = dc->w.ArcDirection;
 292     newdc->w.xformWorld2Wnd   = dc->w.xformWorld2Wnd;
 293     newdc->w.xformWorld2Vport = dc->w.xformWorld2Vport;
 294     newdc->w.xformVport2World = dc->w.xformVport2World;
 295     newdc->w.vport2WorldValid = dc->w.vport2WorldValid;
 296     newdc->wndOrgX            = dc->wndOrgX;
 297     newdc->wndOrgY            = dc->wndOrgY;
 298     newdc->wndExtX            = dc->wndExtX;
 299     newdc->wndExtY            = dc->wndExtY;
 300     newdc->vportOrgX          = dc->vportOrgX;
 301     newdc->vportOrgY          = dc->vportOrgY;
 302     newdc->vportExtX          = dc->vportExtX;
 303     newdc->vportExtY          = dc->vportExtY;
 304
 305     newdc->hSelf = (HDC)handle;
 306     newdc->saveLevel = 0;
 307
 308     PATH_InitGdiPath( &newdc->w.path );
 309
 310     newdc->w.pAbortProc = NULL;
 311     newdc->hookThunk  = NULL;
 312
 313     /* Get/SetDCState() don't change hVisRgn field ("Undoc. Windows" p.559). */
 314
 315     newdc->w.hGCClipRgn = newdc->w.hVisRgn = 0;
 316     if (dc->w.hClipRgn)
 317     {
 318         newdc->w.hClipRgn = CreateRectRgn( 0, 0, 0, 0 );
 319         CombineRgn( newdc->w.hClipRgn, dc->w.hClipRgn, 0, RGN_COPY );
 320     }
 321     else
 322         newdc->w.hClipRgn = 0;
 323     GDI_ReleaseObj( handle );
 324     GDI_ReleaseObj( hdc );
 325     return handle;
 326 }
 327
 328
 329 /***********************************************************************
 330  *           SetDCState    (GDI.180)
 331  */
 332 void WINAPI SetDCState16( HDC16 hdc, HDC16 hdcs )
 333 {
 334     DC *dc, *dcs;
 335
 336     if (!(dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC ))) return;
 337     if (!(dcs = (DC *) GDI_GetObjPtr( hdcs, DC_MAGIC )))
 338     {
 339       GDI_ReleaseObj( hdc );
 340       return;
 341     }
 342     if (!dcs->w.flags & DC_SAVED)
 343     {
 344       GDI_ReleaseObj( hdc );
 345       GDI_ReleaseObj( hdcs );
 346       return;
 347     }
 348     TRACE("%04x %04x\n", hdc, hdcs );
 349
 350     dc->w.flags            = dcs->w.flags & ~DC_SAVED;
 351     dc->w.devCaps          = dcs->w.devCaps;
 352     dc->w.hDevice          = dcs->w.hDevice;
 353     dc->w.totalExtent      = dcs->w.totalExtent;
 354     dc->w.ROPmode          = dcs->w.ROPmode;
 355     dc->w.polyFillMode     = dcs->w.polyFillMode;
 356     dc->w.stretchBltMode   = dcs->w.stretchBltMode;
 357     dc->w.relAbsMode       = dcs->w.relAbsMode;
 358     dc->w.backgroundMode   = dcs->w.backgroundMode;
 359     dc->w.backgroundColor  = dcs->w.backgroundColor;
 360     dc->w.textColor        = dcs->w.textColor;
 361     dc->w.brushOrgX        = dcs->w.brushOrgX;
 362     dc->w.brushOrgY        = dcs->w.brushOrgY;
 363     dc->w.textAlign        = dcs->w.textAlign;
 364     dc->w.charExtra        = dcs->w.charExtra;
 365     dc->w.breakTotalExtra  = dcs->w.breakTotalExtra;
 366     dc->w.breakCount       = dcs->w.breakCount;
 367     dc->w.breakExtra       = dcs->w.breakExtra;
 368     dc->w.breakRem         = dcs->w.breakRem;
 369     dc->w.MapMode          = dcs->w.MapMode;
 370     dc->w.GraphicsMode     = dcs->w.GraphicsMode;
 371 #if 0
 372     /* Apparently, the DC origin is not changed by [GS]etDCState */
 373     dc->w.DCOrgX           = dcs->w.DCOrgX;
 374     dc->w.DCOrgY           = dcs->w.DCOrgY;
 375 #endif
 376     dc->w.CursPosX         = dcs->w.CursPosX;
 377     dc->w.CursPosY         = dcs->w.CursPosY;
 378     dc->w.ArcDirection     = dcs->w.ArcDirection;
 379     dc->w.xformWorld2Wnd   = dcs->w.xformWorld2Wnd;
 380     dc->w.xformWorld2Vport = dcs->w.xformWorld2Vport;
 381     dc->w.xformVport2World = dcs->w.xformVport2World;
 382     dc->w.vport2WorldValid = dcs->w.vport2WorldValid;
 383
 384     dc->wndOrgX            = dcs->wndOrgX;
 385     dc->wndOrgY            = dcs->wndOrgY;
 386     dc->wndExtX            = dcs->wndExtX;
 387     dc->wndExtY            = dcs->wndExtY;
 388     dc->vportOrgX          = dcs->vportOrgX;
 389     dc->vportOrgY          = dcs->vportOrgY;
 390     dc->vportExtX          = dcs->vportExtX;
 391     dc->vportExtY          = dcs->vportExtY;
 392
 393     if (!(dc->w.flags & DC_MEMORY)) dc->w.bitsPerPixel = dcs->w.bitsPerPixel;
 394
 395     if (dcs->w.hClipRgn)
 396     {
 397         if (!dc->w.hClipRgn) dc->w.hClipRgn = CreateRectRgn( 0, 0, 0, 0 );
 398         CombineRgn( dc->w.hClipRgn, dcs->w.hClipRgn, 0, RGN_COPY );
 399     }
 400     else
 401     {
 402         if (dc->w.hClipRgn) DeleteObject16( dc->w.hClipRgn );
 403         dc->w.hClipRgn = 0;
 404     }
 405     CLIPPING_UpdateGCRegion( dc );
 406
 407     SelectObject( hdc, dcs->w.hBitmap );
 408     SelectObject( hdc, dcs->w.hBrush );
 409     SelectObject( hdc, dcs->w.hFont );
 410     SelectObject( hdc, dcs->w.hPen );
 411     SetBkColor( hdc, dcs->w.backgroundColor);
 412     SetTextColor( hdc, dcs->w.textColor);
 413     GDISelectPalette16( hdc, dcs->w.hPalette, FALSE );
 414     GDI_ReleaseObj( hdcs );
 415     GDI_ReleaseObj( hdc );
 416 }
 417
 418
 419 /***********************************************************************
 420  *           SaveDC16    (GDI.30)
 421  */
 422 INT16 WINAPI SaveDC16( HDC16 hdc )
 423 {
 424     return (INT16)SaveDC( hdc );
 425 }
 426
 427
 428 /***********************************************************************
 429  *           SaveDC    (GDI32.292)
 430  */
 431 INT WINAPI SaveDC( HDC hdc )
 432 {
 433     HDC hdcs;
 434     DC * dc, * dcs;
 435     INT ret;
 436
 437     dc = DC_GetDCUpdate( hdc );
 438     if (!dc) return 0;
 439
 440     if(dc->funcs->pSaveDC)
 441     {
 442         ret = dc->funcs->pSaveDC( dc );
 443         GDI_ReleaseObj( hdc );
 444         return ret;
 445     }
 446
 447     if (!(hdcs = GetDCState16( hdc )))
 448     {
 449       GDI_ReleaseObj( hdc );
 450       return 0;
 451     }
 452     dcs = GDI_GetObjPtr( hdcs, DC_MAGIC );
 453
 454     /* Copy path. The reason why path saving / restoring is in SaveDC/
 455      * RestoreDC and not in GetDCState/SetDCState is that the ...DCState
 456      * functions are only in Win16 (which doesn't have paths) and that
 457      * SetDCState doesn't allow us to signal an error (which can happen
 458      * when copying paths).
 459      */
 460     if (!PATH_AssignGdiPath( &dcs->w.path, &dc->w.path ))
 461     {
 462         GDI_ReleaseObj( hdc );
 463         GDI_ReleaseObj( hdcs );
 464         DeleteDC( hdcs );
 465         return 0;
 466     }
 467
 468     dcs->header.hNext = dc->header.hNext;
 469     dc->header.hNext = hdcs;
 470     TRACE("(%04x): returning %d\n", hdc, dc->saveLevel+1 );
 471     ret = ++dc->saveLevel;
 472     GDI_ReleaseObj( hdcs );
 473     GDI_ReleaseObj( hdc );
 474     return ret;
 475 }
 476
 477
 478 /***********************************************************************
 479  *           RestoreDC16    (GDI.39)
 480  */
 481 BOOL16 WINAPI RestoreDC16( HDC16 hdc, INT16 level )
 482 {
 483     return RestoreDC( hdc, level );
 484 }
 485
 486
 487 /***********************************************************************
 488  *           RestoreDC    (GDI32.290)
 489  */
 490 BOOL WINAPI RestoreDC( HDC hdc, INT level )
 491 {
 492     DC * dc, * dcs;
 493     BOOL success;
 494
 495     TRACE("%04x %d\n", hdc, level );
 496     dc = DC_GetDCPtr( hdc );
 497     if(!dc) return FALSE;
 498     if(dc->funcs->pRestoreDC)
 499     {
 500         success = dc->funcs->pRestoreDC( dc, level );
 501         GDI_ReleaseObj( hdc );
 502         return success;
 503     }
 504
 505     if (level == -1) level = dc->saveLevel;
 506     if ((level < 1)
 507             /* This pair of checks disagrees with MSDN "Platform SDK:
 508                Windows GDI" July 2000 which says all negative values
 509                for level will be interpreted as an instance relative
 510                to the current state.  Restricting it to just -1 does
 511                not satisfy this */
 512         || (level > dc->saveLevel))
 513     {
 514         GDI_ReleaseObj( hdc );
 515         return FALSE;
 516     }
 517
 518     success=TRUE;
 519     while (dc->saveLevel >= level)
 520     {
 521         HDC16 hdcs = dc->header.hNext;
 522         if (!(dcs = (DC *) GDI_GetObjPtr( hdcs, DC_MAGIC )))
 523         {
 524           GDI_ReleaseObj( hdc );
 525           return FALSE;
 526         }
 527         dc->header.hNext = dcs->header.hNext;
 528         if (--dc->saveLevel < level)
 529         {
 530             SetDCState16( hdc, hdcs );
 531             if (!PATH_AssignGdiPath( &dc->w.path, &dcs->w.path ))
 532                 /* FIXME: This might not be quite right, since we're
 533                  * returning FALSE but still destroying the saved DC state */
 534                 success=FALSE;
 535         }
 536         GDI_ReleaseObj( hdcs );
 537         DeleteDC( hdcs );
 538     }
 539     GDI_ReleaseObj( hdc );
 540     return success;
 541 }
 542
 543
 544 /***********************************************************************
 545  *           CreateDC16    (GDI.53)
 546  */
 547 HDC16 WINAPI CreateDC16( LPCSTR driver, LPCSTR device, LPCSTR output,
 548                          const DEVMODEA *initData )
 549 {
 550     HDC hdc;
 551     DC * dc;
 552     const DC_FUNCTIONS *funcs;
 553     char buf[300];
 554
 555     if (!device || !DRIVER_GetDriverName( device, buf, sizeof(buf) ))
 556         strcpy(buf, driver);
 557
 558     if (!(funcs = DRIVER_FindDriver( buf ))) return 0;
 559     if (!(dc = DC_AllocDC( funcs ))) return 0;
 560     dc->w.flags = 0;
 561
 562     TRACE("(driver=%s, device=%s, output=%s): returning %04x\n",
 563                debugstr_a(driver), debugstr_a(device), debugstr_a(output), dc->hSelf );
 564
 565     if (dc->funcs->pCreateDC &&
 566         !dc->funcs->pCreateDC( dc, buf, device, output, initData ))
 567     {
 568         WARN("creation aborted by device\n" );
 569         GDI_FreeObject( dc->hSelf, dc );
 570         return 0;
 571     }
 572
 573     DC_InitDC( dc );
 574     hdc = dc->hSelf;
 575     GDI_ReleaseObj( hdc );
 576     return hdc;
 577 }
 578
 579
 580 /***********************************************************************
 581  *           CreateDCA    (GDI32.)
 582  */
 583 HDC WINAPI CreateDCA( LPCSTR driver, LPCSTR device, LPCSTR output,
 584                           const DEVMODEA *initData )
 585 {
 586     return CreateDC16( driver, device, output, (const DEVMODEA *)initData );
 587 }
 588
 589
 590 /***********************************************************************
 591  *           CreateDCW    (GDI32.)
 592  */
 593 HDC WINAPI CreateDCW( LPCWSTR driver, LPCWSTR device, LPCWSTR output,
 594                           const DEVMODEW *initData )
 595 {
 596     LPSTR driverA = HEAP_strdupWtoA( GetProcessHeap(), 0, driver );
 597     LPSTR deviceA = HEAP_strdupWtoA( GetProcessHeap(), 0, device );
 598     LPSTR outputA = HEAP_strdupWtoA( GetProcessHeap(), 0, output );
 599     HDC res = CreateDC16( driverA, deviceA, outputA,
 600                             (const DEVMODEA *)initData /*FIXME*/ );
 601     HeapFree( GetProcessHeap(), 0, driverA );
 602     HeapFree( GetProcessHeap(), 0, deviceA );
 603     HeapFree( GetProcessHeap(), 0, outputA );
 604     return res;
 605 }
 606
 607
 608 /***********************************************************************
 609  *           CreateIC16    (GDI.153)
 610  */
 611 HDC16 WINAPI CreateIC16( LPCSTR driver, LPCSTR device, LPCSTR output,
 612                          const DEVMODEA* initData )
 613 {
 614       /* Nothing special yet for ICs */
 615     return CreateDC16( driver, device, output, initData );
 616 }
 617
 618
 619 /***********************************************************************
 620  *           CreateICA    (GDI32.49)
 621  */
 622 HDC WINAPI CreateICA( LPCSTR driver, LPCSTR device, LPCSTR output,
 623                           const DEVMODEA* initData )
 624 {
 625       /* Nothing special yet for ICs */
 626     return CreateDCA( driver, device, output, initData );
 627 }
 628
 629
 630 /***********************************************************************
 631  *           CreateICW    (GDI32.50)
 632  */
 633 HDC WINAPI CreateICW( LPCWSTR driver, LPCWSTR device, LPCWSTR output,
 634                           const DEVMODEW* initData )
 635 {
 636       /* Nothing special yet for ICs */
 637     return CreateDCW( driver, device, output, initData );
 638 }
 639
 640
 641 /***********************************************************************
 642  *           CreateCompatibleDC16    (GDI.52)
 643  */
 644 HDC16 WINAPI CreateCompatibleDC16( HDC16 hdc )
 645 {
 646     return (HDC16)CreateCompatibleDC( hdc );
 647 }
 648
 649
 650 /***********************************************************************
 651  *           CreateCompatibleDC   (GDI32.31)
 652  */
 653 HDC WINAPI CreateCompatibleDC( HDC hdc )
 654 {
 655     DC *dc, *origDC;
 656     const DC_FUNCTIONS *funcs;
 657
 658     if ((origDC = (DC *)GDI_GetObjPtr( hdc, DC_MAGIC ))) funcs = origDC->funcs;
 659     else funcs = DRIVER_FindDriver( "DISPLAY" );
 660
 661     if (!funcs || !(dc = DC_AllocDC( funcs )))
 662     {
 663         if (origDC) GDI_ReleaseObj( hdc );
 664         return 0;
 665     }
 666
 667     TRACE("(%04x): returning %04x\n",
 668                hdc, dc->hSelf );
 669
 670     dc->w.flags        = DC_MEMORY;
 671     dc->w.bitsPerPixel = 1;
 672     dc->w.hBitmap      = hPseudoStockBitmap;
 673
 674     /* Copy the driver-specific physical device info into
 675      * the new DC. The driver may use this read-only info
 676      * while creating the compatible DC below. */
 677     if (origDC)
 678         dc->physDev = origDC->physDev;
 679
 680     if (dc->funcs->pCreateDC &&
 681         !dc->funcs->pCreateDC( dc, NULL, NULL, NULL, NULL ))
 682     {
 683         WARN("creation aborted by device\n");
 684         GDI_FreeObject( dc->hSelf, dc );
 685         if (origDC) GDI_ReleaseObj( hdc );
 686         return 0;
 687     }
 688
 689     DC_InitDC( dc );
 690     GDI_ReleaseObj( dc->hSelf );
 691     if (origDC) GDI_ReleaseObj( hdc );
 692     return dc->hSelf;
 693 }
 694
 695
 696 /***********************************************************************
 697  *           DeleteDC16    (GDI.68)
 698  */
 699 BOOL16 WINAPI DeleteDC16( HDC16 hdc )
 700 {
 701     return DeleteDC( hdc );
 702 }
 703
 704
 705 /***********************************************************************
 706  *           DeleteDC    (GDI32.67)
 707  */
 708 BOOL WINAPI DeleteDC( HDC hdc )
 709 {
 710     DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
 711     if (!dc) return FALSE;
 712
 713     TRACE("%04x\n", hdc );
 714
 715     /* Call hook procedure to check whether is it OK to delete this DC */
 716     if (dc->hookThunk && !(dc->w.flags & (DC_SAVED | DC_MEMORY)))
 717     {
 718         DCHOOKPROC proc = dc->hookThunk;
 719         if (proc)
 720         {
 721             DWORD data = dc->dwHookData;
 722             GDI_ReleaseObj( hdc );
 723             if (!proc( hdc, DCHC_DELETEDC, data, 0 )) return FALSE;
 724             if (!(dc = DC_GetDCPtr( hdc ))) return FALSE;
 725         }
 726     }
 727
 728     while (dc->saveLevel)
 729     {
 730         DC * dcs;
 731         HDC16 hdcs = dc->header.hNext;
 732         if (!(dcs = (DC *) GDI_GetObjPtr( hdcs, DC_MAGIC ))) break;
 733         dc->header.hNext = dcs->header.hNext;
 734         dc->saveLevel--;
 735         GDI_ReleaseObj( hdcs );
 736         DeleteDC( hdcs );
 737     }
 738
 739     if (!(dc->w.flags & DC_SAVED))
 740     {
 741         SelectObject( hdc, STOCK_BLACK_PEN );
 742         SelectObject( hdc, STOCK_WHITE_BRUSH );
 743         SelectObject( hdc, STOCK_SYSTEM_FONT );
 744         if (dc->funcs->pDeleteDC) dc->funcs->pDeleteDC(dc);
 745     }
 746
 747     if (dc->w.hClipRgn) DeleteObject( dc->w.hClipRgn );
 748     if (dc->w.hVisRgn) DeleteObject( dc->w.hVisRgn );
 749     if (dc->w.hGCClipRgn) DeleteObject( dc->w.hGCClipRgn );
 750     if (dc->w.pAbortProc) THUNK_Free( (FARPROC)dc->w.pAbortProc );
 751     if (dc->hookThunk) THUNK_Free( (FARPROC)dc->hookThunk );
 752     PATH_DestroyGdiPath(&dc->w.path);
 753
 754     return GDI_FreeObject( hdc, dc );
 755 }
 756
 757
 758 /***********************************************************************
 759  *           ResetDC16    (GDI.376)
 760  */
 761 HDC16 WINAPI ResetDC16( HDC16 hdc, const DEVMODEA *devmode )
 762 {
 763     FIXME("stub\n" );
 764     return hdc;
 765 }
 766
 767
 768 /***********************************************************************
 769  *           ResetDCA    (GDI32.287)
 770  */
 771 HDC WINAPI ResetDCA( HDC hdc, const DEVMODEA *devmode )
 772 {
 773     FIXME("stub\n" );
 774     return hdc;
 775 }
 776
 777
 778 /***********************************************************************
 779  *           ResetDCW    (GDI32.288)
 780  */
 781 HDC WINAPI ResetDCW( HDC hdc, const DEVMODEW *devmode )
 782 {
 783     FIXME("stub\n" );
 784     return hdc;
 785 }
 786
 787
 788 /***********************************************************************
 789  *           GetDeviceCaps16    (GDI.80)
 790  */
 791 INT16 WINAPI GetDeviceCaps16( HDC16 hdc, INT16 cap )
 792 {
 793     return GetDeviceCaps( hdc, cap );
 794 }
 795
 796
 797 /***********************************************************************
 798  *           GetDeviceCaps    (GDI32.171)
 799  */
 800 INT WINAPI GetDeviceCaps( HDC hdc, INT cap )
 801 {
 802     DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
 803     INT ret = 0;
 804     POINT pt;
 805
 806     if (!dc) return 0;
 807
 808     /* Device capabilities for the printer */
 809     switch (cap)
 810     {
 811     case PHYSICALWIDTH:
 812         if(Escape(hdc, GETPHYSPAGESIZE, 0, NULL, (LPVOID)&pt) > 0) ret = pt.x;
 813         break;
 814     case PHYSICALHEIGHT:
 815         if(Escape(hdc, GETPHYSPAGESIZE, 0, NULL, (LPVOID)&pt) > 0) ret = pt.y;
 816         break;
 817     case PHYSICALOFFSETX:
 818         if(Escape(hdc, GETPRINTINGOFFSET, 0, NULL, (LPVOID)&pt) > 0) ret = pt.x;
 819         break;
 820     case PHYSICALOFFSETY:
 821         if(Escape(hdc, GETPRINTINGOFFSET, 0, NULL, (LPVOID)&pt) > 0) ret = pt.y;
 822         break;
 823     case SCALINGFACTORX:
 824         if(Escape(hdc, GETSCALINGFACTOR, 0, NULL, (LPVOID)&pt) > 0) ret = pt.x;
 825         break;
 826     case SCALINGFACTORY:
 827         if(Escape(hdc, GETSCALINGFACTOR, 0, NULL, (LPVOID)&pt) > 0) ret = pt.y;
 828         break;
 829     default:
 830         if ((cap < 0) || (cap > sizeof(DeviceCaps)-sizeof(WORD))) break;
 831
 832         if (((cap>=46) && (cap<88)) || ((cap>=92) && (cap<104)))
 833             FIXME("(%04x,%d): unsupported DeviceCaps capability, will yield 0!\n",
 834                   hdc,cap );
 835         ret = *(WORD *)(((char *)dc->w.devCaps) + cap);
 836         break;
 837     }
 838
 839     TRACE("(%04x,%d): returning %d\n", hdc, cap, ret );
 840     GDI_ReleaseObj( hdc );
 841     return ret;
 842 }
 843
 844
 845 /***********************************************************************
 846  *           SetBkColor16    (GDI.1)
 847  */
 848 COLORREF WINAPI SetBkColor16( HDC16 hdc, COLORREF color )
 849 {
 850     return SetBkColor( hdc, color );
 851 }
 852
 853
 854 /***********************************************************************
 855  *           SetBkColor    (GDI32.305)
 856  */
 857 COLORREF WINAPI SetBkColor( HDC hdc, COLORREF color )
 858 {
 859     COLORREF oldColor;
 860     DC * dc = DC_GetDCPtr( hdc );
 861
 862     if (!dc) return 0x80000000;
 863     if (dc->funcs->pSetBkColor)
 864         oldColor = dc->funcs->pSetBkColor(dc, color);
 865     else {
 866         oldColor = dc->w.backgroundColor;
 867         dc->w.backgroundColor = color;
 868     }
 869     GDI_ReleaseObj( hdc );
 870     return oldColor;
 871 }
 872
 873
 874 /***********************************************************************
 875  *           SetTextColor16    (GDI.9)
 876  */
 877 COLORREF WINAPI SetTextColor16( HDC16 hdc, COLORREF color )
 878 {
 879     return SetTextColor( hdc, color );
 880 }
 881
 882
 883 /***********************************************************************
 884  *           SetTextColor    (GDI32.338)
 885  */
 886 COLORREF WINAPI SetTextColor( HDC hdc, COLORREF color )
 887 {
 888     COLORREF oldColor;
 889     DC * dc = DC_GetDCPtr( hdc );
 890
 891     if (!dc) return 0x80000000;
 892     if (dc->funcs->pSetTextColor)
 893         oldColor = dc->funcs->pSetTextColor(dc, color);
 894     else {
 895         oldColor = dc->w.textColor;
 896         dc->w.textColor = color;
 897     }
 898     GDI_ReleaseObj( hdc );
 899     return oldColor;
 900 }
 901
 902 /***********************************************************************
 903  *           SetTextAlign16    (GDI.346)
 904  */
 905 UINT16 WINAPI SetTextAlign16( HDC16 hdc, UINT16 align )
 906 {
 907     return SetTextAlign( hdc, align );
 908 }
 909
 910
 911 /***********************************************************************
 912  *           SetTextAlign    (GDI32.336)
 913  */
 914 UINT WINAPI SetTextAlign( HDC hdc, UINT align )
 915 {
 916     UINT prevAlign;
 917     DC *dc = DC_GetDCPtr( hdc );
 918     if (!dc) return 0x0;
 919     if (dc->funcs->pSetTextAlign)
 920         prevAlign = dc->funcs->pSetTextAlign(dc, align);
 921     else {
 922         prevAlign = dc->w.textAlign;
 923         dc->w.textAlign = align;
 924     }
 925     GDI_ReleaseObj( hdc );
 926     return prevAlign;
 927 }
 928
 929 /***********************************************************************
 930  *           GetDCOrgEx  (GDI32.168)
 931  */
 932 BOOL WINAPI GetDCOrgEx( HDC hDC, LPPOINT lpp )
 933 {
 934     DC * dc;
 935
 936     if (!lpp) return FALSE;
 937     if (!(dc = (DC *) GDI_GetObjPtr( hDC, DC_MAGIC ))) return FALSE;
 938
 939     lpp->x = lpp->y = 0;
 940     if (dc->funcs->pGetDCOrgEx) dc->funcs->pGetDCOrgEx( dc, lpp );
 941     lpp->x += dc->w.DCOrgX;
 942     lpp->y += dc->w.DCOrgY;
 943     GDI_ReleaseObj( hDC );
 944     return TRUE;
 945 }
 946
 947
 948 /***********************************************************************
 949  *           GetDCOrg    (GDI.79)
 950  */
 951 DWORD WINAPI GetDCOrg16( HDC16 hdc )
 952 {
 953     POINT       pt;
 954     if( GetDCOrgEx( hdc, &pt) )
 955         return MAKELONG( (WORD)pt.x, (WORD)pt.y );
 956     return 0;
 957 }
 958
 959
 960 /***********************************************************************
 961  *           SetDCOrg    (GDI.117)
 962  */
 963 DWORD WINAPI SetDCOrg16( HDC16 hdc, INT16 x, INT16 y )
 964 {
 965     DWORD prevOrg;
 966     DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
 967     if (!dc) return 0;
 968     prevOrg = dc->w.DCOrgX | (dc->w.DCOrgY << 16);
 969     dc->w.DCOrgX = x;
 970     dc->w.DCOrgY = y;
 971     GDI_ReleaseObj( hdc );
 972     return prevOrg;
 973 }
 974
 975
 976 /***********************************************************************
 977  *           SetGraphicsMode    (GDI32.317)
 978  */
 979 INT WINAPI SetGraphicsMode( HDC hdc, INT mode )
 980 {
 981     INT ret = 0;
 982     DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
 983
 984     /* One would think that setting the graphics mode to GM_COMPATIBLE
 985      * would also reset the world transformation matrix to the unity
 986      * matrix. However, in Windows, this is not the case. This doesn't
 987      * make a lot of sense to me, but that's the way it is.
 988      */
 989
 990     if (!dc) return 0;
 991     if ((mode > 0) || (mode <= GM_LAST))
 992     {
 993     ret = dc->w.GraphicsMode;
 994     dc->w.GraphicsMode = mode;
 995 }
 996     GDI_ReleaseObj( hdc );
 997     return ret;
 998 }
 999
1000
1001 /***********************************************************************
1002  *           SetArcDirection16    (GDI.525)
1003  */
1004 INT16 WINAPI SetArcDirection16( HDC16 hdc, INT16 nDirection )
1005 {
1006     return SetArcDirection( (HDC)hdc, (INT)nDirection );
1007 }
1008
1009
1010 /***********************************************************************
1011  *           SetArcDirection    (GDI32.302)
1012  */
1013 INT WINAPI SetArcDirection( HDC hdc, INT nDirection )
1014 {
1015     DC * dc;
1016     INT nOldDirection = 0;
1017
1018     if (nDirection!=AD_COUNTERCLOCKWISE && nDirection!=AD_CLOCKWISE)
1019     {
1020         SetLastError(ERROR_INVALID_PARAMETER);
1021         return 0;
1022     }
1023
1024     if ((dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC )))
1025     {
1026     nOldDirection = dc->w.ArcDirection;
1027     dc->w.ArcDirection = nDirection;
1028         GDI_ReleaseObj( hdc );
1029     }
1030     return nOldDirection;
1031 }
1032
1033
1034 /***********************************************************************
1035  *           GetWorldTransform    (GDI32.244)
1036  */
1037 BOOL WINAPI GetWorldTransform( HDC hdc, LPXFORM xform )
1038 {
1039     DC * dc;
1040     if (!xform) return FALSE;
1041     if (!(dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC ))) return FALSE;
1042     *xform = dc->w.xformWorld2Wnd;
1043     GDI_ReleaseObj( hdc );
1044     return TRUE;
1045 }
1046
1047
1048 /***********************************************************************
1049  *           SetWorldTransform    (GDI32.346)
1050  */
1051 BOOL WINAPI SetWorldTransform( HDC hdc, const XFORM *xform )
1052 {
1053     BOOL ret = FALSE;
1054     DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
1055
1056     if (!dc)
1057     {
1058         SetLastError( ERROR_INVALID_HANDLE );
1059         return FALSE;
1060     }
1061
1062     if (!xform) goto done;
1063
1064     /* Check that graphics mode is GM_ADVANCED */
1065     if (dc->w.GraphicsMode!=GM_ADVANCED) goto done;
1066
1067     dc->w.xformWorld2Wnd = *xform;
1068     DC_UpdateXforms( dc );
1069     ret = TRUE;
1070  done:
1071     GDI_ReleaseObj( hdc );
1072     return ret;
1073 }
1074
1075
1076 /****************************************************************************
1077  * ModifyWorldTransform [GDI32.253]
1078  * Modifies the world transformation for a device context.
1079  *
1080  * PARAMS
1081  *    hdc   [I] Handle to device context
1082  *    xform [I] XFORM structure that will be used to modify the world
1083  *              transformation
1084  *    iMode [I] Specifies in what way to modify the world transformation
1085  *              Possible values:
1086  *              MWT_IDENTITY
1087  *                 Resets the world transformation to the identity matrix.
1088  *                 The parameter xform is ignored.
1089  *              MWT_LEFTMULTIPLY
1090  *                 Multiplies xform into the world transformation matrix from
1091  *                 the left.
1092  *              MWT_RIGHTMULTIPLY
1093  *                 Multiplies xform into the world transformation matrix from
1094  *                 the right.
1095  *
1096  * RETURNS STD
1097  */
1098 BOOL WINAPI ModifyWorldTransform( HDC hdc, const XFORM *xform,
1099     DWORD iMode )
1100 {
1101     BOOL ret = FALSE;
1102     DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
1103
1104     /* Check for illegal parameters */
1105     if (!dc)
1106     {
1107         SetLastError( ERROR_INVALID_HANDLE );
1108         return FALSE;
1109     }
1110     if (!xform) goto done;
1111
1112     /* Check that graphics mode is GM_ADVANCED */
1113     if (dc->w.GraphicsMode!=GM_ADVANCED) goto done;
1114
1115     switch (iMode)
1116     {
1117         case MWT_IDENTITY:
1118             dc->w.xformWorld2Wnd.eM11 = 1.0f;
1119             dc->w.xformWorld2Wnd.eM12 = 0.0f;
1120             dc->w.xformWorld2Wnd.eM21 = 0.0f;
1121             dc->w.xformWorld2Wnd.eM22 = 1.0f;
1122             dc->w.xformWorld2Wnd.eDx  = 0.0f;
1123             dc->w.xformWorld2Wnd.eDy  = 0.0f;
1124             break;
1125         case MWT_LEFTMULTIPLY:
1126             CombineTransform( &dc->w.xformWorld2Wnd, xform,
1127                 &dc->w.xformWorld2Wnd );
1128             break;
1129         case MWT_RIGHTMULTIPLY:
1130             CombineTransform( &dc->w.xformWorld2Wnd, &dc->w.xformWorld2Wnd,
1131                 xform );
1132             break;
1133         default:
1134             goto done;
1135     }
1136
1137     DC_UpdateXforms( dc );
1138     ret = TRUE;
1139  done:
1140     GDI_ReleaseObj( hdc );
1141     return ret;
1142 }
1143
1144
1145 /****************************************************************************
1146  * CombineTransform [GDI32.20]
1147  * Combines two transformation matrices.
1148  *
1149  * PARAMS
1150  *    xformResult [O] Stores the result of combining the two matrices
1151  *    xform1      [I] Specifies the first matrix to apply
1152  *    xform2      [I] Specifies the second matrix to apply
1153  *
1154  * REMARKS
1155  *    The same matrix can be passed in for more than one of the parameters.
1156  *
1157  * RETURNS STD
1158  */
1159 BOOL WINAPI CombineTransform( LPXFORM xformResult, const XFORM *xform1,
1160     const XFORM *xform2 )
1161 {
1162     XFORM xformTemp;
1163
1164     /* Check for illegal parameters */
1165     if (!xformResult || !xform1 || !xform2)
1166         return FALSE;
1167
1168     /* Create the result in a temporary XFORM, since xformResult may be
1169      * equal to xform1 or xform2 */
1170     xformTemp.eM11 = xform1->eM11 * xform2->eM11 +
1171                      xform1->eM12 * xform2->eM21;
1172     xformTemp.eM12 = xform1->eM11 * xform2->eM12 +
1173                      xform1->eM12 * xform2->eM22;
1174     xformTemp.eM21 = xform1->eM21 * xform2->eM11 +
1175                      xform1->eM22 * xform2->eM21;
1176     xformTemp.eM22 = xform1->eM21 * xform2->eM12 +
1177                      xform1->eM22 * xform2->eM22;
1178     xformTemp.eDx  = xform1->eDx  * xform2->eM11 +
1179                      xform1->eDy  * xform2->eM21 +
1180                      xform2->eDx;
1181     xformTemp.eDy  = xform1->eDx  * xform2->eM12 +
1182                      xform1->eDy  * xform2->eM22 +
1183                      xform2->eDy;
1184
1185     /* Copy the result to xformResult */
1186     *xformResult = xformTemp;
1187
1188     return TRUE;
1189 }
1190
1191
1192 /***********************************************************************
1193  *           SetDCHook   (GDI.190)
1194  */
1195 /* ### start build ### */
1196 extern WORD CALLBACK GDI_CallTo16_word_wwll(FARPROC16,WORD,WORD,LONG,LONG);
1197 /* ### stop build ### */
1198 BOOL16 WINAPI SetDCHook( HDC16 hdc, FARPROC16 hookProc, DWORD dwHookData )
1199 {
1200     DC *dc = (DC *)GDI_GetObjPtr( hdc, DC_MAGIC );
1201     if (!dc) return FALSE;
1202
1203     /*
1204      * Note: We store the original SEGPTR 'hookProc' as we need to be
1205      *       able to return it verbatim in GetDCHook,
1206      *
1207      *       On the other hand, we still call THUNK_Alloc and store the
1208      *       32-bit thunk into another DC member, because THUNK_Alloc
1209      *       recognizes the (typical) case that the 'hookProc' is indeed
1210      *       the 16-bit API entry point of a built-in routine (e.g. DCHook16)
1211      *
1212      *       We could perform that test every time the hook is about to
1213      *       be called (or else we could live with the 32->16->32 detour),
1214      *       but this way is the most efficient ...
1215      */
1216
1217     dc->hookProc = hookProc;
1218     dc->dwHookData = dwHookData;
1219
1220     THUNK_Free( (FARPROC)dc->hookThunk );
1221     dc->hookThunk = (DCHOOKPROC)
1222                     THUNK_Alloc( hookProc, (RELAY)GDI_CallTo16_word_wwll );
1223
1224     GDI_ReleaseObj( hdc );
1225     return TRUE;
1226 }
1227
1228
1229 /***********************************************************************
1230  *           GetDCHook   (GDI.191)
1231  */
1232 DWORD WINAPI GetDCHook( HDC16 hdc, FARPROC16 *phookProc )
1233 {
1234     DC *dc = (DC *)GDI_GetObjPtr( hdc, DC_MAGIC );
1235     if (!dc) return 0;
1236     *phookProc = dc->hookProc;
1237     GDI_ReleaseObj( hdc );
1238     return dc->dwHookData;
1239 }
1240
1241
1242 /***********************************************************************
1243  *           SetHookFlags       (GDI.192)
1244  */
1245 WORD WINAPI SetHookFlags16(HDC16 hDC, WORD flags)
1246 {
1247     DC* dc = (DC*)GDI_GetObjPtr( hDC, DC_MAGIC );
1248
1249     if( dc )
1250     {
1251         WORD wRet = dc->w.flags & DC_DIRTY;
1252
1253         /* "Undocumented Windows" info is slightly confusing.
1254          */
1255
1256         TRACE("hDC %04x, flags %04x\n",hDC,flags);
1257
1258         if( flags & DCHF_INVALIDATEVISRGN )
1259             dc->w.flags |= DC_DIRTY;
1260         else if( flags & DCHF_VALIDATEVISRGN || !flags )
1261             dc->w.flags &= ~DC_DIRTY;
1262         GDI_ReleaseObj( hDC );
1263         return wRet;
1264     }
1265     return 0;
1266 }
1267
1268 /***********************************************************************
1269  *           SetICMMode    (GDI32.318)
1270  */
1271 INT WINAPI SetICMMode(HDC hdc, INT iEnableICM)
1272 {
1273 /*FIXME  Asuming that ICM is always off, and cannot be turned on */
1274     if (iEnableICM == ICM_OFF) return ICM_OFF;
1275     if (iEnableICM == ICM_ON) return 0;
1276     if (iEnableICM == ICM_QUERY) return ICM_OFF;
1277     return 0;
1278 }
1279
1280
1281 /***********************************************************************
1282  *           GetColorSpace    (GDI32.165)
1283  */
1284 HCOLORSPACE WINAPI GetColorSpace(HDC hdc)
1285 {
1286 /*FIXME    Need to to whatever GetColorSpace actually does */
1287     return 0;
1288 }
1289
1290 /***********************************************************************
1291  *           CreateColorSpaceA    (GDI32.???)
1292  */
1293 HCOLORSPACE WINAPI CreateColorSpaceA( LPLOGCOLORSPACEA lpLogColorSpace )
1294 {
1295   FIXME( "stub\n" );
1296   return 0;
1297 }
1298
1299 /***********************************************************************
1300  *           CreateColorSpaceW    (GDI32.???)
1301  */
1302 HCOLORSPACE WINAPI CreateColorSpaceW( LPLOGCOLORSPACEW lpLogColorSpace )
1303 {
1304   FIXME( "stub\n" );
1305   return 0;
1306 }
1307
1308 /***********************************************************************
1309  *           DeleteColorSpace     (GDI32.???)
1310  */
1311 BOOL WINAPI DeleteColorSpace( HCOLORSPACE hColorSpace )
1312 {
1313   FIXME( "stub\n" );
1314
1315   return TRUE;
1316 }
1317
1318 /***********************************************************************
1319  *           SetColorSpace     (GDI32.???)
1320  */
1321 HCOLORSPACE WINAPI SetColorSpace( HDC hDC, HCOLORSPACE hColorSpace )
1322 {
1323   FIXME( "stub\n" );
1324
1325   return hColorSpace;
1326 }
1327
1328 /***********************************************************************
1329  *           GetBoundsRect16    (GDI.194)
1330  */
1331 UINT16 WINAPI GetBoundsRect16(HDC16 hdc, LPRECT16 rect, UINT16 flags)
1332 {
1333     return DCB_RESET | DCB_DISABLE; /* bounding rectangle always empty and disabled*/
1334 }
1335
1336 /***********************************************************************
1337  *           GetBoundsRect    (GDI32.147)
1338  */
1339 UINT WINAPI GetBoundsRect(HDC hdc, LPRECT rect, UINT flags)
1340 {
1341     FIXME("(): stub\n");
1342     return DCB_RESET;   /* bounding rectangle always empty */
1343 }
1344
1345 /***********************************************************************
1346  *           SetBoundsRect16    (GDI.193)
1347  */
1348 UINT16 WINAPI SetBoundsRect16(HDC16 hdc, const RECT16* rect, UINT16 flags)
1349 {
1350     if ( (flags & DCB_ACCUMULATE) || (flags & DCB_ENABLE) )
1351         FIXME("(%04x, %p, %04x): stub\n", hdc, rect, flags );
1352
1353     return DCB_RESET | DCB_DISABLE; /* bounding rectangle always empty and disabled*/
1354 }
1355
1356 /***********************************************************************
1357  *           SetBoundsRect    (GDI32.307)
1358  */
1359 UINT WINAPI SetBoundsRect(HDC hdc, const RECT* rect, UINT flags)
1360 {
1361     FIXME("(): stub\n");
1362     return DCB_DISABLE;   /* bounding rectangle always empty */
1363 }
1364
1365
1366 /***********************************************************************
1367  *              GetRelAbs               (GDI32.218)
1368  */
1369 INT WINAPI GetRelAbs( HDC hdc, DWORD dwIgnore )
1370 {
1371     DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
1372     if (!dc) return 0;
1373     return dc->w.relAbsMode;
1374 }
1375
1376 /***********************************************************************
1377  *           Death    (GDI.121)
1378  *
1379  * Disables GDI, switches back to text mode.
1380  * We don't have to do anything here,
1381  * just let console support handle everything
1382  */
1383 void WINAPI Death16(HDC16 hDC)
1384 {
1385     MESSAGE("Death(%04x) called. Application enters text mode...\n", hDC);
1386 }
1387
1388 /***********************************************************************
1389  *           Resurrection    (GDI.122)
1390  *
1391  * Restores GDI functionality
1392  */
1393 void WINAPI Resurrection16(HDC16 hDC,
1394                            WORD w1, WORD w2, WORD w3, WORD w4, WORD w5, WORD w6)
1395 {
1396     MESSAGE("Resurrection(%04x, %04x, %04x, %04x, %04x, %04x, %04x) called. Application left text mode.\n", hDC, w1, w2, w3, w4, w5, w6);
1397 }
1398
1399 /***********************************************************************
1400  *           GetLayout    (GDI32.321)
1401  *
1402  * Gets left->right or right->left text layout flags of a dc.
1403  * win98 just returns 0 and sets ERROR_CALL_NOT_IMPLEMENTED so we do the same
1404  *
1405  */
1406 DWORD WINAPI GetLayout(HDC hdc)
1407 {
1408     FIXME("(%08x): stub\n", hdc);
1409     SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
1410     return 0;
1411 }
1412
1413 /***********************************************************************
1414  *           SetLayout    (GDI32.450)
1415  *
1416  * Sets left->right or right->left text layout flags of a dc.
1417  * win98 just returns 0 and sets ERROR_CALL_NOT_IMPLEMENTED so we do the same
1418  *
1419  */
1420 DWORD WINAPI SetLayout(HDC hdc, DWORD layout)
1421 {
1422     FIXME("(%08x,%08lx): stub\n", hdc, layout);
1423     SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
1424     return 0;
1425 }