dlls/gdi32/driver.c

   1 /*
   2  * Graphics driver management functions
   3  *
   4  * Copyright 1994 Bob Amstadt
   5  * Copyright 1996, 2001 Alexandre Julliard
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #include "config.h"
  23 #include "wine/port.h"
  24
  25 #include <assert.h>
  26 #include <stdarg.h>
  27 #include <string.h>
  28 #include <stdio.h>
  29 #include "windef.h"
  30 #include "winbase.h"
  31 #include "winreg.h"
  32 #include "ddrawgdi.h"
  33 #include "wine/winbase16.h"
  34
  35 #include "gdi_private.h"
  36 #include "wine/unicode.h"
  37 #include "wine/list.h"
  38 #include "wine/debug.h"
  39
  40 WINE_DEFAULT_DEBUG_CHANNEL(driver);
  41
  42 struct graphics_driver
  43 {
  44     struct list                entry;
  45     HMODULE                    module;  /* module handle */
  46     const struct gdi_dc_funcs *funcs;
  47 };
  48
  49 static struct list drivers = LIST_INIT( drivers );
  50 static struct graphics_driver *display_driver;
  51 static DWORD display_driver_load_error;
  52
  53 const struct gdi_dc_funcs *font_driver = NULL;
  54
  55 static CRITICAL_SECTION driver_section;
  56 static CRITICAL_SECTION_DEBUG critsect_debug =
  57 {
  58     0, 0, &driver_section,
  59     { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
  60       0, 0, { (DWORD_PTR)(__FILE__ ": driver_section") }
  61 };
  62 static CRITICAL_SECTION driver_section = { &critsect_debug, -1, 0, 0, 0, 0 };
  63
  64 /**********************************************************************
  65  *           create_driver
  66  *
  67  * Allocate and fill the driver structure for a given module.
  68  */
  69 static struct graphics_driver *create_driver( HMODULE module )
  70 {
  71     static const struct gdi_dc_funcs empty_funcs;
  72     const struct gdi_dc_funcs *funcs = NULL;
  73     struct graphics_driver *driver;
  74
  75     if (!(driver = HeapAlloc( GetProcessHeap(), 0, sizeof(*driver)))) return NULL;
  76     driver->module = module;
  77
  78     if (module)
  79     {
  80         const struct gdi_dc_funcs * (CDECL *wine_get_gdi_driver)( unsigned int version );
  81
  82         if ((wine_get_gdi_driver = (void *)GetProcAddress( module, "wine_get_gdi_driver" )))
  83             funcs = wine_get_gdi_driver( WINE_GDI_DRIVER_VERSION );
  84     }
  85     if (!funcs) funcs = &empty_funcs;
  86     driver->funcs = funcs;
  87     return driver;
  88 }
  89
  90
  91 /**********************************************************************
  92  *           get_display_driver
  93  *
  94  * Special case for loading the display driver: get the name from the config file
  95  */
  96 static const struct gdi_dc_funcs *get_display_driver( HMODULE *module_ret )
  97 {
  98     struct graphics_driver *driver;
  99     char buffer[MAX_PATH], libname[32], *name, *next;
 100     HMODULE module = 0;
 101     HKEY hkey;
 102
 103     if (display_driver)
 104     {
 105         *module_ret = display_driver->module;
 106         return display_driver->funcs;  /* already loaded */
 107     }
 108
 109     strcpy( buffer, "x11" );  /* default value */
 110     /* @@ Wine registry key: HKCU\Software\Wine\Drivers */
 111     if (!RegOpenKeyA( HKEY_CURRENT_USER, "Software\\Wine\\Drivers", &hkey ))
 112     {
 113         DWORD type, count = sizeof(buffer);
 114         RegQueryValueExA( hkey, "Graphics", 0, &type, (LPBYTE) buffer, &count );
 115         RegCloseKey( hkey );
 116     }
 117
 118     name = buffer;
 119     while (name)
 120     {
 121         next = strchr( name, ',' );
 122         if (next) *next++ = 0;
 123
 124         snprintf( libname, sizeof(libname), "wine%s.drv", name );
 125         if ((module = LoadLibraryA( libname )) != 0) break;
 126         name = next;
 127     }
 128
 129     if (!module) display_driver_load_error = GetLastError();
 130
 131     if (!(driver = create_driver( module )))
 132     {
 133         MESSAGE( "Could not create graphics driver '%s'\n", buffer );
 134         FreeLibrary( module );
 135         ExitProcess(1);
 136     }
 137     if (InterlockedCompareExchangePointer( (void **)&display_driver, driver, NULL ))
 138     {
 139         /* somebody beat us to it */
 140         FreeLibrary( driver->module );
 141         HeapFree( GetProcessHeap(), 0, driver );
 142     }
 143     return display_driver->funcs;
 144 }
 145
 146
 147 /**********************************************************************
 148  *           DRIVER_load_driver
 149  */
 150 const struct gdi_dc_funcs *DRIVER_load_driver( LPCWSTR name, HMODULE *module_ret )
 151 {
 152     HMODULE module;
 153     struct graphics_driver *driver, *new_driver;
 154     static const WCHAR displayW[] = { 'd','i','s','p','l','a','y',0 };
 155     static const WCHAR display1W[] = {'\\','\\','.','\\','D','I','S','P','L','A','Y','1',0};
 156
 157     /* display driver is a special case */
 158     if (!strcmpiW( name, displayW ) || !strcmpiW( name, display1W ))
 159         return get_display_driver( module_ret );
 160
 161     if ((module = GetModuleHandleW( name )))
 162     {
 163         if (display_driver && display_driver->module == module)
 164         {
 165             *module_ret = module;
 166             return display_driver->funcs;
 167         }
 168         EnterCriticalSection( &driver_section );
 169         LIST_FOR_EACH_ENTRY( driver, &drivers, struct graphics_driver, entry )
 170         {
 171             if (driver->module == module) goto done;
 172         }
 173         LeaveCriticalSection( &driver_section );
 174     }
 175
 176     if (!(module = LoadLibraryW( name ))) return NULL;
 177
 178     if (!(new_driver = create_driver( module )))
 179     {
 180         FreeLibrary( module );
 181         return NULL;
 182     }
 183
 184     /* check if someone else added it in the meantime */
 185     EnterCriticalSection( &driver_section );
 186     LIST_FOR_EACH_ENTRY( driver, &drivers, struct graphics_driver, entry )
 187     {
 188         if (driver->module != module) continue;
 189         FreeLibrary( module );
 190         HeapFree( GetProcessHeap(), 0, new_driver );
 191         goto done;
 192     }
 193     driver = new_driver;
 194     list_add_head( &drivers, &driver->entry );
 195     TRACE( "loaded driver %p for %s\n", driver, debugstr_w(name) );
 196 done:
 197     *module_ret = driver->module;
 198     LeaveCriticalSection( &driver_section );
 199     return driver->funcs;
 200 }
 201
 202
 203 /***********************************************************************
 204  *           __wine_get_driver_module    (GDI32.@)
 205  */
 206 HMODULE CDECL __wine_get_driver_module( HDC hdc )
 207 {
 208     DC *dc;
 209     HMODULE ret = 0;
 210
 211     if ((dc = get_dc_ptr( hdc )))
 212     {
 213         ret = dc->module;
 214         release_dc_ptr( dc );
 215         if (!ret) SetLastError( display_driver_load_error );
 216     }
 217     else SetLastError( ERROR_INVALID_HANDLE );
 218     return ret;
 219 }
 220
 221
 222 static INT nulldrv_AbortDoc( PHYSDEV dev )
 223 {
 224     return 0;
 225 }
 226
 227 static BOOL nulldrv_Arc( PHYSDEV dev, INT left, INT top, INT right, INT bottom,
 228                          INT xstart, INT ystart, INT xend, INT yend )
 229 {
 230     return TRUE;
 231 }
 232
 233 static BOOL nulldrv_Chord( PHYSDEV dev, INT left, INT top, INT right, INT bottom,
 234                            INT xstart, INT ystart, INT xend, INT yend )
 235 {
 236     return TRUE;
 237 }
 238
 239 static BOOL nulldrv_CreateCompatibleDC( PHYSDEV orig, PHYSDEV *pdev )
 240 {
 241     if (!display_driver || !display_driver->funcs->pCreateCompatibleDC) return TRUE;
 242     return display_driver->funcs->pCreateCompatibleDC( NULL, pdev );
 243 }
 244
 245 static BOOL nulldrv_CreateDC( PHYSDEV *dev, LPCWSTR driver, LPCWSTR device,
 246                               LPCWSTR output, const DEVMODEW *devmode )
 247 {
 248     assert(0);  /* should never be called */
 249     return FALSE;
 250 }
 251
 252 static BOOL nulldrv_DeleteDC( PHYSDEV dev )
 253 {
 254     assert(0);  /* should never be called */
 255     return TRUE;
 256 }
 257
 258 static BOOL nulldrv_DeleteObject( PHYSDEV dev, HGDIOBJ obj )
 259 {
 260     return TRUE;
 261 }
 262
 263 static DWORD nulldrv_DeviceCapabilities( LPSTR buffer, LPCSTR device, LPCSTR port,
 264                                          WORD cap, LPSTR output, DEVMODEA *devmode )
 265 {
 266     return -1;
 267 }
 268
 269 static BOOL nulldrv_Ellipse( PHYSDEV dev, INT left, INT top, INT right, INT bottom )
 270 {
 271     return TRUE;
 272 }
 273
 274 static INT nulldrv_EndDoc( PHYSDEV dev )
 275 {
 276     return 0;
 277 }
 278
 279 static INT nulldrv_EndPage( PHYSDEV dev )
 280 {
 281     return 0;
 282 }
 283
 284 static BOOL nulldrv_EnumFonts( PHYSDEV dev, LOGFONTW *logfont, FONTENUMPROCW proc, LPARAM lParam )
 285 {
 286     return TRUE;
 287 }
 288
 289 static INT nulldrv_EnumICMProfiles( PHYSDEV dev, ICMENUMPROCW func, LPARAM lparam )
 290 {
 291     return -1;
 292 }
 293
 294 static INT nulldrv_ExtDeviceMode( LPSTR buffer, HWND hwnd, DEVMODEA *output, LPSTR device,
 295                                   LPSTR port, DEVMODEA *input, LPSTR profile, DWORD mode )
 296 {
 297     return -1;
 298 }
 299
 300 static INT nulldrv_ExtEscape( PHYSDEV dev, INT escape, INT in_size, const void *in_data,
 301                                     INT out_size, void *out_data )
 302 {
 303     return 0;
 304 }
 305
 306 static BOOL nulldrv_ExtFloodFill( PHYSDEV dev, INT x, INT y, COLORREF color, UINT type )
 307 {
 308     return TRUE;
 309 }
 310
 311 static BOOL nulldrv_FontIsLinked( PHYSDEV dev )
 312 {
 313     return FALSE;
 314 }
 315
 316 static BOOL nulldrv_GdiComment( PHYSDEV dev, UINT size, const BYTE *data )
 317 {
 318     return FALSE;
 319 }
 320
 321 static BOOL nulldrv_GdiRealizationInfo( PHYSDEV dev, void *info )
 322 {
 323     return FALSE;
 324 }
 325
 326 static UINT nulldrv_GetBoundsRect( PHYSDEV dev, RECT *rect, UINT flags )
 327 {
 328     return DCB_RESET;
 329 }
 330
 331 static BOOL nulldrv_GetCharABCWidths( PHYSDEV dev, UINT first, UINT last, LPABC abc )
 332 {
 333     return FALSE;
 334 }
 335
 336 static BOOL nulldrv_GetCharABCWidthsI( PHYSDEV dev, UINT first, UINT count, WORD *indices, LPABC abc )
 337 {
 338     return FALSE;
 339 }
 340
 341 static BOOL nulldrv_GetCharWidth( PHYSDEV dev, UINT first, UINT last, INT *buffer )
 342 {
 343     return FALSE;
 344 }
 345
 346 static INT nulldrv_GetDeviceCaps( PHYSDEV dev, INT cap )
 347 {
 348     switch (cap)  /* return meaningful values for some entries */
 349     {
 350     case HORZRES:     return 640;
 351     case VERTRES:     return 480;
 352     case BITSPIXEL:   return 1;
 353     case PLANES:      return 1;
 354     case NUMCOLORS:   return 2;
 355     case ASPECTX:     return 36;
 356     case ASPECTY:     return 36;
 357     case ASPECTXY:    return 51;
 358     case LOGPIXELSX:  return 72;
 359     case LOGPIXELSY:  return 72;
 360     case SIZEPALETTE: return 2;
 361     case TEXTCAPS:    return (TC_OP_CHARACTER | TC_OP_STROKE | TC_CP_STROKE |
 362                               TC_CR_ANY | TC_SF_X_YINDEP | TC_SA_DOUBLE | TC_SA_INTEGER |
 363                               TC_SA_CONTIN | TC_UA_ABLE | TC_SO_ABLE | TC_RA_ABLE | TC_VA_ABLE);
 364     default:          return 0;
 365     }
 366 }
 367
 368 static BOOL nulldrv_GetDeviceGammaRamp( PHYSDEV dev, void *ramp )
 369 {
 370     SetLastError( ERROR_INVALID_PARAMETER );
 371     return FALSE;
 372 }
 373
 374 static DWORD nulldrv_GetFontData( PHYSDEV dev, DWORD table, DWORD offset, LPVOID buffer, DWORD length )
 375 {
 376     return FALSE;
 377 }
 378
 379 static DWORD nulldrv_GetFontUnicodeRanges( PHYSDEV dev, LPGLYPHSET glyphs )
 380 {
 381     return 0;
 382 }
 383
 384 static DWORD nulldrv_GetGlyphIndices( PHYSDEV dev, LPCWSTR str, INT count, LPWORD indices, DWORD flags )
 385 {
 386     return GDI_ERROR;
 387 }
 388
 389 static DWORD nulldrv_GetGlyphOutline( PHYSDEV dev, UINT ch, UINT format, LPGLYPHMETRICS metrics,
 390                                       DWORD size, LPVOID buffer, const MAT2 *mat )
 391 {
 392     return GDI_ERROR;
 393 }
 394
 395 static BOOL nulldrv_GetICMProfile( PHYSDEV dev, LPDWORD size, LPWSTR filename )
 396 {
 397     return FALSE;
 398 }
 399
 400 static DWORD nulldrv_GetImage( PHYSDEV dev, BITMAPINFO *info, struct gdi_image_bits *bits,
 401                                struct bitblt_coords *src )
 402 {
 403     return ERROR_NOT_SUPPORTED;
 404 }
 405
 406 static DWORD nulldrv_GetKerningPairs( PHYSDEV dev, DWORD count, LPKERNINGPAIR pairs )
 407 {
 408     return 0;
 409 }
 410
 411 static UINT nulldrv_GetOutlineTextMetrics( PHYSDEV dev, UINT size, LPOUTLINETEXTMETRICW otm )
 412 {
 413     return 0;
 414 }
 415
 416 static UINT nulldrv_GetSystemPaletteEntries( PHYSDEV dev, UINT start, UINT count, PALETTEENTRY *entries )
 417 {
 418     return 0;
 419 }
 420
 421 static UINT nulldrv_GetTextCharsetInfo( PHYSDEV dev, LPFONTSIGNATURE fs, DWORD flags )
 422 {
 423     return DEFAULT_CHARSET;
 424 }
 425
 426 static BOOL nulldrv_GetTextExtentExPoint( PHYSDEV dev, LPCWSTR str, INT count, INT max_ext,
 427                                           INT *fit, INT *dx, SIZE *size )
 428 {
 429     return FALSE;
 430 }
 431
 432 static BOOL nulldrv_GetTextExtentExPointI( PHYSDEV dev, const WORD *indices, INT count, INT max_ext,
 433                                            INT *fit, INT *dx, SIZE *size )
 434 {
 435     return FALSE;
 436 }
 437
 438 static INT nulldrv_GetTextFace( PHYSDEV dev, INT size, LPWSTR name )
 439 {
 440     INT ret = 0;
 441     LOGFONTW font;
 442     HFONT hfont = GetCurrentObject( dev->hdc, OBJ_FONT );
 443
 444     if (GetObjectW( hfont, sizeof(font), &font ))
 445     {
 446         ret = strlenW( font.lfFaceName ) + 1;
 447         if (name)
 448         {
 449             lstrcpynW( name, font.lfFaceName, size );
 450             ret = min( size, ret );
 451         }
 452     }
 453     return ret;
 454 }
 455
 456 static BOOL nulldrv_GetTextMetrics( PHYSDEV dev, TEXTMETRICW *metrics )
 457 {
 458     return FALSE;
 459 }
 460
 461 static BOOL nulldrv_LineTo( PHYSDEV dev, INT x, INT y )
 462 {
 463     return TRUE;
 464 }
 465
 466 static BOOL nulldrv_MoveTo( PHYSDEV dev, INT x, INT y )
 467 {
 468     return TRUE;
 469 }
 470
 471 static BOOL nulldrv_PaintRgn( PHYSDEV dev, HRGN rgn )
 472 {
 473     return TRUE;
 474 }
 475
 476 static BOOL nulldrv_PatBlt( PHYSDEV dev, struct bitblt_coords *dst, DWORD rop )
 477 {
 478     return TRUE;
 479 }
 480
 481 static BOOL nulldrv_Pie( PHYSDEV dev, INT left, INT top, INT right, INT bottom,
 482                          INT xstart, INT ystart, INT xend, INT yend )
 483 {
 484     return TRUE;
 485 }
 486
 487 static BOOL nulldrv_PolyPolygon( PHYSDEV dev, const POINT *points, const INT *counts, UINT polygons )
 488 {
 489     return TRUE;
 490 }
 491
 492 static BOOL nulldrv_PolyPolyline( PHYSDEV dev, const POINT *points, const DWORD *counts, DWORD lines )
 493 {
 494     return TRUE;
 495 }
 496
 497 static BOOL nulldrv_Polygon( PHYSDEV dev, const POINT *points, INT count )
 498 {
 499     INT counts[1] = { count };
 500
 501     return PolyPolygon( dev->hdc, points, counts, 1 );
 502 }
 503
 504 static BOOL nulldrv_Polyline( PHYSDEV dev, const POINT *points, INT count )
 505 {
 506     DWORD counts[1] = { count };
 507
 508     if (count < 0) return FALSE;
 509     return PolyPolyline( dev->hdc, points, counts, 1 );
 510 }
 511
 512 static DWORD nulldrv_PutImage( PHYSDEV dev, HRGN clip, BITMAPINFO *info,
 513                                const struct gdi_image_bits *bits, struct bitblt_coords *src,
 514                                struct bitblt_coords *dst, DWORD rop )
 515 {
 516     return ERROR_SUCCESS;
 517 }
 518
 519 static UINT nulldrv_RealizeDefaultPalette( PHYSDEV dev )
 520 {
 521     return 0;
 522 }
 523
 524 static UINT nulldrv_RealizePalette( PHYSDEV dev, HPALETTE palette, BOOL primary )
 525 {
 526     return 0;
 527 }
 528
 529 static BOOL nulldrv_Rectangle( PHYSDEV dev, INT left, INT top, INT right, INT bottom )
 530 {
 531     return TRUE;
 532 }
 533
 534 static HDC nulldrv_ResetDC( PHYSDEV dev, const DEVMODEW *devmode )
 535 {
 536     return 0;
 537 }
 538
 539 static BOOL nulldrv_RoundRect( PHYSDEV dev, INT left, INT top, INT right, INT bottom,
 540                                INT ell_width, INT ell_height )
 541 {
 542     return TRUE;
 543 }
 544
 545 static HBITMAP nulldrv_SelectBitmap( PHYSDEV dev, HBITMAP bitmap )
 546 {
 547     return bitmap;
 548 }
 549
 550 static HBRUSH nulldrv_SelectBrush( PHYSDEV dev, HBRUSH brush, const struct brush_pattern *pattern )
 551 {
 552     return brush;
 553 }
 554
 555 static HFONT nulldrv_SelectFont( PHYSDEV dev, HFONT font )
 556 {
 557     return 0;
 558 }
 559
 560 static HPALETTE nulldrv_SelectPalette( PHYSDEV dev, HPALETTE palette, BOOL bkgnd )
 561 {
 562     return palette;
 563 }
 564
 565 static HPEN nulldrv_SelectPen( PHYSDEV dev, HPEN pen, const struct brush_pattern *pattern )
 566 {
 567     return pen;
 568 }
 569
 570 static INT nulldrv_SetArcDirection( PHYSDEV dev, INT dir )
 571 {
 572     return dir;
 573 }
 574
 575 static COLORREF nulldrv_SetBkColor( PHYSDEV dev, COLORREF color )
 576 {
 577     return color;
 578 }
 579
 580 static INT nulldrv_SetBkMode( PHYSDEV dev, INT mode )
 581 {
 582     return mode;
 583 }
 584
 585 static UINT nulldrv_SetBoundsRect( PHYSDEV dev, RECT *rect, UINT flags )
 586 {
 587     return DCB_RESET;
 588 }
 589
 590 static COLORREF nulldrv_SetDCBrushColor( PHYSDEV dev, COLORREF color )
 591 {
 592     return color;
 593 }
 594
 595 static COLORREF nulldrv_SetDCPenColor( PHYSDEV dev, COLORREF color )
 596 {
 597     return color;
 598 }
 599
 600 static void nulldrv_SetDeviceClipping( PHYSDEV dev, HRGN rgn )
 601 {
 602 }
 603
 604 static DWORD nulldrv_SetLayout( PHYSDEV dev, DWORD layout )
 605 {
 606     return layout;
 607 }
 608
 609 static BOOL nulldrv_SetDeviceGammaRamp( PHYSDEV dev, void *ramp )
 610 {
 611     SetLastError( ERROR_INVALID_PARAMETER );
 612     return FALSE;
 613 }
 614
 615 static DWORD nulldrv_SetMapperFlags( PHYSDEV dev, DWORD flags )
 616 {
 617     return flags;
 618 }
 619
 620 static COLORREF nulldrv_SetPixel( PHYSDEV dev, INT x, INT y, COLORREF color )
 621 {
 622     return color;
 623 }
 624
 625 static INT nulldrv_SetPolyFillMode( PHYSDEV dev, INT mode )
 626 {
 627     return mode;
 628 }
 629
 630 static INT nulldrv_SetROP2( PHYSDEV dev, INT rop )
 631 {
 632     return rop;
 633 }
 634
 635 static INT nulldrv_SetRelAbs( PHYSDEV dev, INT mode )
 636 {
 637     return mode;
 638 }
 639
 640 static INT nulldrv_SetStretchBltMode( PHYSDEV dev, INT mode )
 641 {
 642     return mode;
 643 }
 644
 645 static UINT nulldrv_SetTextAlign( PHYSDEV dev, UINT align )
 646 {
 647     return align;
 648 }
 649
 650 static INT nulldrv_SetTextCharacterExtra( PHYSDEV dev, INT extra )
 651 {
 652     return extra;
 653 }
 654
 655 static COLORREF nulldrv_SetTextColor( PHYSDEV dev, COLORREF color )
 656 {
 657     return color;
 658 }
 659
 660 static BOOL nulldrv_SetTextJustification( PHYSDEV dev, INT extra, INT breaks )
 661 {
 662     return TRUE;
 663 }
 664
 665 static INT nulldrv_StartDoc( PHYSDEV dev, const DOCINFOW *info )
 666 {
 667     return 0;
 668 }
 669
 670 static INT nulldrv_StartPage( PHYSDEV dev )
 671 {
 672     return 1;
 673 }
 674
 675 static BOOL nulldrv_UnrealizePalette( HPALETTE palette )
 676 {
 677     return FALSE;
 678 }
 679
 680 static struct opengl_funcs *nulldrv_wine_get_wgl_driver( PHYSDEV dev, UINT version )
 681 {
 682     return (void *)-1;
 683 }
 684
 685 const struct gdi_dc_funcs null_driver =
 686 {
 687     nulldrv_AbortDoc,                   /* pAbortDoc */
 688     nulldrv_AbortPath,                  /* pAbortPath */
 689     nulldrv_AlphaBlend,                 /* pAlphaBlend */
 690     nulldrv_AngleArc,                   /* pAngleArc */
 691     nulldrv_Arc,                        /* pArc */
 692     nulldrv_ArcTo,                      /* pArcTo */
 693     nulldrv_BeginPath,                  /* pBeginPath */
 694     nulldrv_BlendImage,                 /* pBlendImage */
 695     nulldrv_Chord,                      /* pChord */
 696     nulldrv_CloseFigure,                /* pCloseFigure */
 697     nulldrv_CreateCompatibleDC,         /* pCreateCompatibleDC */
 698     nulldrv_CreateDC,                   /* pCreateDC */
 699     nulldrv_DeleteDC,                   /* pDeleteDC */
 700     nulldrv_DeleteObject,               /* pDeleteObject */
 701     nulldrv_DeviceCapabilities,         /* pDeviceCapabilities */
 702     nulldrv_Ellipse,                    /* pEllipse */
 703     nulldrv_EndDoc,                     /* pEndDoc */
 704     nulldrv_EndPage,                    /* pEndPage */
 705     nulldrv_EndPath,                    /* pEndPath */
 706     nulldrv_EnumFonts,                  /* pEnumFonts */
 707     nulldrv_EnumICMProfiles,            /* pEnumICMProfiles */
 708     nulldrv_ExcludeClipRect,            /* pExcludeClipRect */
 709     nulldrv_ExtDeviceMode,              /* pExtDeviceMode */
 710     nulldrv_ExtEscape,                  /* pExtEscape */
 711     nulldrv_ExtFloodFill,               /* pExtFloodFill */
 712     nulldrv_ExtSelectClipRgn,           /* pExtSelectClipRgn */
 713     nulldrv_ExtTextOut,                 /* pExtTextOut */
 714     nulldrv_FillPath,                   /* pFillPath */
 715     nulldrv_FillRgn,                    /* pFillRgn */
 716     nulldrv_FlattenPath,                /* pFlattenPath */
 717     nulldrv_FontIsLinked,               /* pFontIsLinked */
 718     nulldrv_FrameRgn,                   /* pFrameRgn */
 719     nulldrv_GdiComment,                 /* pGdiComment */
 720     nulldrv_GdiRealizationInfo,         /* pGdiRealizationInfo */
 721     nulldrv_GetBoundsRect,              /* pGetBoundsRect */
 722     nulldrv_GetCharABCWidths,           /* pGetCharABCWidths */
 723     nulldrv_GetCharABCWidthsI,          /* pGetCharABCWidthsI */
 724     nulldrv_GetCharWidth,               /* pGetCharWidth */
 725     nulldrv_GetDeviceCaps,              /* pGetDeviceCaps */
 726     nulldrv_GetDeviceGammaRamp,         /* pGetDeviceGammaRamp */
 727     nulldrv_GetFontData,                /* pGetFontData */
 728     nulldrv_GetFontUnicodeRanges,       /* pGetFontUnicodeRanges */
 729     nulldrv_GetGlyphIndices,            /* pGetGlyphIndices */
 730     nulldrv_GetGlyphOutline,            /* pGetGlyphOutline */
 731     nulldrv_GetICMProfile,              /* pGetICMProfile */
 732     nulldrv_GetImage,                   /* pGetImage */
 733     nulldrv_GetKerningPairs,            /* pGetKerningPairs */
 734     nulldrv_GetNearestColor,            /* pGetNearestColor */
 735     nulldrv_GetOutlineTextMetrics,      /* pGetOutlineTextMetrics */
 736     nulldrv_GetPixel,                   /* pGetPixel */
 737     nulldrv_GetSystemPaletteEntries,    /* pGetSystemPaletteEntries */
 738     nulldrv_GetTextCharsetInfo,         /* pGetTextCharsetInfo */
 739     nulldrv_GetTextExtentExPoint,       /* pGetTextExtentExPoint */
 740     nulldrv_GetTextExtentExPointI,      /* pGetTextExtentExPointI */
 741     nulldrv_GetTextFace,                /* pGetTextFace */
 742     nulldrv_GetTextMetrics,             /* pGetTextMetrics */
 743     nulldrv_GradientFill,               /* pGradientFill */
 744     nulldrv_IntersectClipRect,          /* pIntersectClipRect */
 745     nulldrv_InvertRgn,                  /* pInvertRgn */
 746     nulldrv_LineTo,                     /* pLineTo */
 747     nulldrv_ModifyWorldTransform,       /* pModifyWorldTransform */
 748     nulldrv_MoveTo,                     /* pMoveTo */
 749     nulldrv_OffsetClipRgn,              /* pOffsetClipRgn */
 750     nulldrv_OffsetViewportOrgEx,        /* pOffsetViewportOrg */
 751     nulldrv_OffsetWindowOrgEx,          /* pOffsetWindowOrg */
 752     nulldrv_PaintRgn,                   /* pPaintRgn */
 753     nulldrv_PatBlt,                     /* pPatBlt */
 754     nulldrv_Pie,                        /* pPie */
 755     nulldrv_PolyBezier,                 /* pPolyBezier */
 756     nulldrv_PolyBezierTo,               /* pPolyBezierTo */
 757     nulldrv_PolyDraw,                   /* pPolyDraw */
 758     nulldrv_PolyPolygon,                /* pPolyPolygon */
 759     nulldrv_PolyPolyline,               /* pPolyPolyline */
 760     nulldrv_Polygon,                    /* pPolygon */
 761     nulldrv_Polyline,                   /* pPolyline */
 762     nulldrv_PolylineTo,                 /* pPolylineTo */
 763     nulldrv_PutImage,                   /* pPutImage */
 764     nulldrv_RealizeDefaultPalette,      /* pRealizeDefaultPalette */
 765     nulldrv_RealizePalette,             /* pRealizePalette */
 766     nulldrv_Rectangle,                  /* pRectangle */
 767     nulldrv_ResetDC,                    /* pResetDC */
 768     nulldrv_RestoreDC,                  /* pRestoreDC */
 769     nulldrv_RoundRect,                  /* pRoundRect */
 770     nulldrv_SaveDC,                     /* pSaveDC */
 771     nulldrv_ScaleViewportExtEx,         /* pScaleViewportExt */
 772     nulldrv_ScaleWindowExtEx,           /* pScaleWindowExt */
 773     nulldrv_SelectBitmap,               /* pSelectBitmap */
 774     nulldrv_SelectBrush,                /* pSelectBrush */
 775     nulldrv_SelectClipPath,             /* pSelectClipPath */
 776     nulldrv_SelectFont,                 /* pSelectFont */
 777     nulldrv_SelectPalette,              /* pSelectPalette */
 778     nulldrv_SelectPen,                  /* pSelectPen */
 779     nulldrv_SetArcDirection,            /* pSetArcDirection */
 780     nulldrv_SetBkColor,                 /* pSetBkColor */
 781     nulldrv_SetBkMode,                  /* pSetBkMode */
 782     nulldrv_SetBoundsRect,              /* pSetBoundsRect */
 783     nulldrv_SetDCBrushColor,            /* pSetDCBrushColor */
 784     nulldrv_SetDCPenColor,              /* pSetDCPenColor */
 785     nulldrv_SetDIBitsToDevice,          /* pSetDIBitsToDevice */
 786     nulldrv_SetDeviceClipping,          /* pSetDeviceClipping */
 787     nulldrv_SetDeviceGammaRamp,         /* pSetDeviceGammaRamp */
 788     nulldrv_SetLayout,                  /* pSetLayout */
 789     nulldrv_SetMapMode,                 /* pSetMapMode */
 790     nulldrv_SetMapperFlags,             /* pSetMapperFlags */
 791     nulldrv_SetPixel,                   /* pSetPixel */
 792     nulldrv_SetPolyFillMode,            /* pSetPolyFillMode */
 793     nulldrv_SetROP2,                    /* pSetROP2 */
 794     nulldrv_SetRelAbs,                  /* pSetRelAbs */
 795     nulldrv_SetStretchBltMode,          /* pSetStretchBltMode */
 796     nulldrv_SetTextAlign,               /* pSetTextAlign */
 797     nulldrv_SetTextCharacterExtra,      /* pSetTextCharacterExtra */
 798     nulldrv_SetTextColor,               /* pSetTextColor */
 799     nulldrv_SetTextJustification,       /* pSetTextJustification */
 800     nulldrv_SetViewportExtEx,           /* pSetViewportExt */
 801     nulldrv_SetViewportOrgEx,           /* pSetViewportOrg */
 802     nulldrv_SetWindowExtEx,             /* pSetWindowExt */
 803     nulldrv_SetWindowOrgEx,             /* pSetWindowOrg */
 804     nulldrv_SetWorldTransform,          /* pSetWorldTransform */
 805     nulldrv_StartDoc,                   /* pStartDoc */
 806     nulldrv_StartPage,                  /* pStartPage */
 807     nulldrv_StretchBlt,                 /* pStretchBlt */
 808     nulldrv_StretchDIBits,              /* pStretchDIBits */
 809     nulldrv_StrokeAndFillPath,          /* pStrokeAndFillPath */
 810     nulldrv_StrokePath,                 /* pStrokePath */
 811     nulldrv_UnrealizePalette,           /* pUnrealizePalette */
 812     nulldrv_WidenPath,                  /* pWidenPath */
 813     nulldrv_wine_get_wgl_driver,        /* wine_get_wgl_driver */
 814
 815     GDI_PRIORITY_NULL_DRV               /* priority */
 816 };
 817
 818
 819 /*****************************************************************************
 820  *      DRIVER_GetDriverName
 821  *
 822  */
 823 BOOL DRIVER_GetDriverName( LPCWSTR device, LPWSTR driver, DWORD size )
 824 {
 825     static const WCHAR displayW[] = { 'd','i','s','p','l','a','y',0 };
 826     static const WCHAR devicesW[] = { 'd','e','v','i','c','e','s',0 };
 827     static const WCHAR display1W[] = {'\\','\\','.','\\','D','I','S','P','L','A','Y','1',0};
 828     static const WCHAR empty_strW[] = { 0 };
 829     WCHAR *p;
 830
 831     /* display is a special case */
 832     if (!strcmpiW( device, displayW ) ||
 833         !strcmpiW( device, display1W ))
 834     {
 835         lstrcpynW( driver, displayW, size );
 836         return TRUE;
 837     }
 838
 839     size = GetProfileStringW(devicesW, device, empty_strW, driver, size);
 840     if(!size) {
 841         WARN("Unable to find %s in [devices] section of win.ini\n", debugstr_w(device));
 842         return FALSE;
 843     }
 844     p = strchrW(driver, ',');
 845     if(!p)
 846     {
 847         WARN("%s entry in [devices] section of win.ini is malformed.\n", debugstr_w(device));
 848         return FALSE;
 849     }
 850     *p = 0;
 851     TRACE("Found %s for %s\n", debugstr_w(driver), debugstr_w(device));
 852     return TRUE;
 853 }
 854
 855
 856 /***********************************************************************
 857  *           GdiConvertToDevmodeW    (GDI32.@)
 858  */
 859 DEVMODEW * WINAPI GdiConvertToDevmodeW(const DEVMODEA *dmA)
 860 {
 861     DEVMODEW *dmW;
 862     WORD dmW_size, dmA_size;
 863
 864     dmA_size = dmA->dmSize;
 865
 866     /* this is the minimal dmSize that XP accepts */
 867     if (dmA_size < FIELD_OFFSET(DEVMODEA, dmFields))
 868         return NULL;
 869
 870     if (dmA_size > sizeof(DEVMODEA))
 871         dmA_size = sizeof(DEVMODEA);
 872
 873     dmW_size = dmA_size + CCHDEVICENAME;
 874     if (dmA_size >= FIELD_OFFSET(DEVMODEA, dmFormName) + CCHFORMNAME)
 875         dmW_size += CCHFORMNAME;
 876
 877     dmW = HeapAlloc(GetProcessHeap(), 0, dmW_size + dmA->dmDriverExtra);
 878     if (!dmW) return NULL;
 879
 880     MultiByteToWideChar(CP_ACP, 0, (const char*) dmA->dmDeviceName, -1,
 881                                    dmW->dmDeviceName, CCHDEVICENAME);
 882     /* copy slightly more, to avoid long computations */
 883     memcpy(&dmW->dmSpecVersion, &dmA->dmSpecVersion, dmA_size - CCHDEVICENAME);
 884
 885     if (dmA_size >= FIELD_OFFSET(DEVMODEA, dmFormName) + CCHFORMNAME)
 886     {
 887         if (dmA->dmFields & DM_FORMNAME)
 888             MultiByteToWideChar(CP_ACP, 0, (const char*) dmA->dmFormName, -1,
 889                                        dmW->dmFormName, CCHFORMNAME);
 890         else
 891             dmW->dmFormName[0] = 0;
 892
 893         if (dmA_size > FIELD_OFFSET(DEVMODEA, dmLogPixels))
 894             memcpy(&dmW->dmLogPixels, &dmA->dmLogPixels, dmA_size - FIELD_OFFSET(DEVMODEA, dmLogPixels));
 895     }
 896
 897     if (dmA->dmDriverExtra)
 898         memcpy((char *)dmW + dmW_size, (const char *)dmA + dmA_size, dmA->dmDriverExtra);
 899
 900     dmW->dmSize = dmW_size;
 901
 902     return dmW;
 903 }
 904
 905
 906 /*****************************************************************************
 907  *      @ [GDI32.100]
 908  *
 909  * This should thunk to 16-bit and simply call the proc with the given args.
 910  */
 911 INT WINAPI GDI_CallDevInstall16( FARPROC16 lpfnDevInstallProc, HWND hWnd,
 912                                  LPSTR lpModelName, LPSTR OldPort, LPSTR NewPort )
 913 {
 914     FIXME("(%p, %p, %s, %s, %s)\n", lpfnDevInstallProc, hWnd, lpModelName, OldPort, NewPort );
 915     return -1;
 916 }
 917
 918 /*****************************************************************************
 919  *      @ [GDI32.101]
 920  *
 921  * This should load the correct driver for lpszDevice and calls this driver's
 922  * ExtDeviceModePropSheet proc.
 923  *
 924  * Note: The driver calls a callback routine for each property sheet page; these
 925  * pages are supposed to be filled into the structure pointed to by lpPropSheet.
 926  * The layout of this structure is:
 927  *
 928  * struct
 929  * {
 930  *   DWORD  nPages;
 931  *   DWORD  unknown;
 932  *   HPROPSHEETPAGE  pages[10];
 933  * };
 934  */
 935 INT WINAPI GDI_CallExtDeviceModePropSheet16( HWND hWnd, LPCSTR lpszDevice,
 936                                              LPCSTR lpszPort, LPVOID lpPropSheet )
 937 {
 938     FIXME("(%p, %s, %s, %p)\n", hWnd, lpszDevice, lpszPort, lpPropSheet );
 939     return -1;
 940 }
 941
 942 /*****************************************************************************
 943  *      @ [GDI32.102]
 944  *
 945  * This should load the correct driver for lpszDevice and call this driver's
 946  * ExtDeviceMode proc.
 947  *
 948  * FIXME: convert ExtDeviceMode to unicode in the driver interface
 949  */
 950 INT WINAPI GDI_CallExtDeviceMode16( HWND hwnd,
 951                                     LPDEVMODEA lpdmOutput, LPSTR lpszDevice,
 952                                     LPSTR lpszPort, LPDEVMODEA lpdmInput,
 953                                     LPSTR lpszProfile, DWORD fwMode )
 954 {
 955     WCHAR deviceW[300];
 956     WCHAR bufW[300];
 957     char buf[300];
 958     HDC hdc;
 959     DC *dc;
 960     INT ret = -1;
 961
 962     TRACE("(%p, %p, %s, %s, %p, %s, %d)\n",
 963           hwnd, lpdmOutput, lpszDevice, lpszPort, lpdmInput, lpszProfile, fwMode );
 964
 965     if (!lpszDevice) return -1;
 966     if (!MultiByteToWideChar(CP_ACP, 0, lpszDevice, -1, deviceW, 300)) return -1;
 967
 968     if(!DRIVER_GetDriverName( deviceW, bufW, 300 )) return -1;
 969
 970     if (!WideCharToMultiByte(CP_ACP, 0, bufW, -1, buf, 300, NULL, NULL)) return -1;
 971
 972     if (!(hdc = CreateICA( buf, lpszDevice, lpszPort, NULL ))) return -1;
 973
 974     if ((dc = get_dc_ptr( hdc )))
 975     {
 976         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pExtDeviceMode );
 977         ret = physdev->funcs->pExtDeviceMode( buf, hwnd, lpdmOutput, lpszDevice, lpszPort,
 978                                               lpdmInput, lpszProfile, fwMode );
 979         release_dc_ptr( dc );
 980     }
 981     DeleteDC( hdc );
 982     return ret;
 983 }
 984
 985 /****************************************************************************
 986  *      @ [GDI32.103]
 987  *
 988  * This should load the correct driver for lpszDevice and calls this driver's
 989  * AdvancedSetupDialog proc.
 990  */
 991 INT WINAPI GDI_CallAdvancedSetupDialog16( HWND hwnd, LPSTR lpszDevice,
 992                                           LPDEVMODEA devin, LPDEVMODEA devout )
 993 {
 994     TRACE("(%p, %s, %p, %p)\n", hwnd, lpszDevice, devin, devout );
 995     return -1;
 996 }
 997
 998 /*****************************************************************************
 999  *      @ [GDI32.104]
1000  *
1001  * This should load the correct driver for lpszDevice and calls this driver's
1002  * DeviceCapabilities proc.
1003  *
1004  * FIXME: convert DeviceCapabilities to unicode in the driver interface
1005  */
1006 DWORD WINAPI GDI_CallDeviceCapabilities16( LPCSTR lpszDevice, LPCSTR lpszPort,
1007                                            WORD fwCapability, LPSTR lpszOutput,
1008                                            LPDEVMODEA lpdm )
1009 {
1010     WCHAR deviceW[300];
1011     WCHAR bufW[300];
1012     char buf[300];
1013     HDC hdc;
1014     DC *dc;
1015     INT ret = -1;
1016
1017     TRACE("(%s, %s, %d, %p, %p)\n", lpszDevice, lpszPort, fwCapability, lpszOutput, lpdm );
1018
1019     if (!lpszDevice) return -1;
1020     if (!MultiByteToWideChar(CP_ACP, 0, lpszDevice, -1, deviceW, 300)) return -1;
1021
1022     if(!DRIVER_GetDriverName( deviceW, bufW, 300 )) return -1;
1023
1024     if (!WideCharToMultiByte(CP_ACP, 0, bufW, -1, buf, 300, NULL, NULL)) return -1;
1025
1026     if (!(hdc = CreateICA( buf, lpszDevice, lpszPort, NULL ))) return -1;
1027
1028     if ((dc = get_dc_ptr( hdc )))
1029     {
1030         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pDeviceCapabilities );
1031         ret = physdev->funcs->pDeviceCapabilities( buf, lpszDevice, lpszPort,
1032                                                    fwCapability, lpszOutput, lpdm );
1033         release_dc_ptr( dc );
1034     }
1035     DeleteDC( hdc );
1036     return ret;
1037 }
1038
1039
1040 /************************************************************************
1041  *             Escape  [GDI32.@]
1042  */
1043 INT WINAPI Escape( HDC hdc, INT escape, INT in_count, LPCSTR in_data, LPVOID out_data )
1044 {
1045     INT ret;
1046     POINT *pt;
1047
1048     switch (escape)
1049     {
1050     case ABORTDOC:
1051         return AbortDoc( hdc );
1052
1053     case ENDDOC:
1054         return EndDoc( hdc );
1055
1056     case GETPHYSPAGESIZE:
1057         pt = out_data;
1058         pt->x = GetDeviceCaps( hdc, PHYSICALWIDTH );
1059         pt->y = GetDeviceCaps( hdc, PHYSICALHEIGHT );
1060         return 1;
1061
1062     case GETPRINTINGOFFSET:
1063         pt = out_data;
1064         pt->x = GetDeviceCaps( hdc, PHYSICALOFFSETX );
1065         pt->y = GetDeviceCaps( hdc, PHYSICALOFFSETY );
1066         return 1;
1067
1068     case GETSCALINGFACTOR:
1069         pt = out_data;
1070         pt->x = GetDeviceCaps( hdc, SCALINGFACTORX );
1071         pt->y = GetDeviceCaps( hdc, SCALINGFACTORY );
1072         return 1;
1073
1074     case NEWFRAME:
1075         return EndPage( hdc );
1076
1077     case SETABORTPROC:
1078         return SetAbortProc( hdc, (ABORTPROC)in_data );
1079
1080     case STARTDOC:
1081         {
1082             DOCINFOA doc;
1083             char *name = NULL;
1084
1085             /* in_data may not be 0 terminated so we must copy it */
1086             if (in_data)
1087             {
1088                 name = HeapAlloc( GetProcessHeap(), 0, in_count+1 );
1089                 memcpy( name, in_data, in_count );
1090                 name[in_count] = 0;
1091             }
1092             /* out_data is actually a pointer to the DocInfo structure and used as
1093              * a second input parameter */
1094             if (out_data) doc = *(DOCINFOA *)out_data;
1095             else
1096             {
1097                 doc.cbSize = sizeof(doc);
1098                 doc.lpszOutput = NULL;
1099                 doc.lpszDatatype = NULL;
1100                 doc.fwType = 0;
1101             }
1102             doc.lpszDocName = name;
1103             ret = StartDocA( hdc, &doc );
1104             HeapFree( GetProcessHeap(), 0, name );
1105             if (ret > 0) ret = StartPage( hdc );
1106             return ret;
1107         }
1108
1109     case QUERYESCSUPPORT:
1110         {
1111             const INT *ptr = (const INT *)in_data;
1112             if (in_count < sizeof(INT)) return 0;
1113             switch(*ptr)
1114             {
1115             case ABORTDOC:
1116             case ENDDOC:
1117             case GETPHYSPAGESIZE:
1118             case GETPRINTINGOFFSET:
1119             case GETSCALINGFACTOR:
1120             case NEWFRAME:
1121             case QUERYESCSUPPORT:
1122             case SETABORTPROC:
1123             case STARTDOC:
1124                 return TRUE;
1125             }
1126             break;
1127         }
1128     }
1129
1130     /* if not handled internally, pass it to the driver */
1131     return ExtEscape( hdc, escape, in_count, in_data, 0, out_data );
1132 }
1133
1134
1135 /******************************************************************************
1136  *              ExtEscape       [GDI32.@]
1137  *
1138  * Access capabilities of a particular device that are not available through GDI.
1139  *
1140  * PARAMS
1141  *    hdc         [I] Handle to device context
1142  *    nEscape     [I] Escape function
1143  *    cbInput     [I] Number of bytes in input structure
1144  *    lpszInData  [I] Pointer to input structure
1145  *    cbOutput    [I] Number of bytes in output structure
1146  *    lpszOutData [O] Pointer to output structure
1147  *
1148  * RETURNS
1149  *    Success: >0
1150  *    Not implemented: 0
1151  *    Failure: <0
1152  */
1153 INT WINAPI ExtEscape( HDC hdc, INT nEscape, INT cbInput, LPCSTR lpszInData,
1154                       INT cbOutput, LPSTR lpszOutData )
1155 {
1156     PHYSDEV physdev;
1157     INT ret;
1158     DC * dc = get_dc_ptr( hdc );
1159
1160     if (!dc) return 0;
1161     update_dc( dc );
1162     physdev = GET_DC_PHYSDEV( dc, pExtEscape );
1163     ret = physdev->funcs->pExtEscape( physdev, nEscape, cbInput, lpszInData, cbOutput, lpszOutData );
1164     release_dc_ptr( dc );
1165     return ret;
1166 }
1167
1168
1169 /*******************************************************************
1170  *      DrawEscape [GDI32.@]
1171  *
1172  *
1173  */
1174 INT WINAPI DrawEscape(HDC hdc, INT nEscape, INT cbInput, LPCSTR lpszInData)
1175 {
1176     FIXME("DrawEscape, stub\n");
1177     return 0;
1178 }
1179
1180 /*******************************************************************
1181  *      NamedEscape [GDI32.@]
1182  */
1183 INT WINAPI NamedEscape( HDC hdc, LPCWSTR pDriver, INT nEscape, INT cbInput, LPCSTR lpszInData,
1184                         INT cbOutput, LPSTR lpszOutData )
1185 {
1186     FIXME("(%p, %s, %d, %d, %p, %d, %p)\n",
1187           hdc, wine_dbgstr_w(pDriver), nEscape, cbInput, lpszInData, cbOutput,
1188           lpszOutData);
1189     return 0;
1190 }
1191
1192 /*******************************************************************
1193  *      DdQueryDisplaySettingsUniqueness [GDI32.@]
1194  *      GdiEntry13                       [GDI32.@]
1195  */
1196 ULONG WINAPI DdQueryDisplaySettingsUniqueness(VOID)
1197 {
1198     static int warn_once;
1199
1200     if (!warn_once++)
1201         FIXME("stub\n");
1202     return 0;
1203 }