dlls/gdi/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 <stdarg.h>
  26 #include <string.h>
  27 #include <stdio.h>
  28 #include "windef.h"
  29 #include "winbase.h"
  30 #include "winreg.h"
  31
  32 #include "gdi.h"
  33 #include "gdi_private.h"
  34 #include "wine/unicode.h"
  35 #include "wine/debug.h"
  36
  37 WINE_DEFAULT_DEBUG_CHANNEL(driver);
  38
  39 struct graphics_driver
  40 {
  41     struct graphics_driver *next;
  42     struct graphics_driver *prev;
  43     HMODULE                 module;  /* module handle */
  44     unsigned int            count;   /* reference count */
  45     DC_FUNCTIONS            funcs;
  46 };
  47
  48 static struct graphics_driver *first_driver;
  49 static struct graphics_driver *display_driver;
  50
  51 static CRITICAL_SECTION driver_section;
  52 static CRITICAL_SECTION_DEBUG critsect_debug =
  53 {
  54     0, 0, &driver_section,
  55     { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
  56       0, 0, { (DWORD_PTR)(__FILE__ ": driver_section") }
  57 };
  58 static CRITICAL_SECTION driver_section = { &critsect_debug, -1, 0, 0, 0, 0 };
  59
  60 /**********************************************************************
  61  *           create_driver
  62  *
  63  * Allocate and fill the driver structure for a given module.
  64  */
  65 static struct graphics_driver *create_driver( HMODULE module )
  66 {
  67     struct graphics_driver *driver;
  68
  69     if (!(driver = HeapAlloc( GetProcessHeap(), 0, sizeof(*driver)))) return NULL;
  70     driver->next   = NULL;
  71     driver->prev   = NULL;
  72     driver->module = module;
  73     driver->count  = 1;
  74
  75     /* fill the function table */
  76     if (module)
  77     {
  78 #define GET_FUNC(name) driver->funcs.p##name = (void*)GetProcAddress( module, #name )
  79         GET_FUNC(AbortDoc);
  80         GET_FUNC(AbortPath);
  81         GET_FUNC(AlphaBlend);
  82         GET_FUNC(AngleArc);
  83         GET_FUNC(Arc);
  84         GET_FUNC(ArcTo);
  85         GET_FUNC(BeginPath);
  86         GET_FUNC(BitBlt);
  87         GET_FUNC(ChoosePixelFormat);
  88         GET_FUNC(Chord);
  89         GET_FUNC(CloseFigure);
  90         GET_FUNC(CreateBitmap);
  91         GET_FUNC(CreateDC);
  92         GET_FUNC(CreateDIBSection);
  93         GET_FUNC(DeleteBitmap);
  94         GET_FUNC(DeleteDC);
  95         GET_FUNC(DescribePixelFormat);
  96         GET_FUNC(DeviceCapabilities);
  97         GET_FUNC(Ellipse);
  98         GET_FUNC(EndDoc);
  99         GET_FUNC(EndPage);
 100         GET_FUNC(EndPath);
 101         GET_FUNC(EnumDeviceFonts);
 102         GET_FUNC(ExcludeClipRect);
 103         GET_FUNC(ExtDeviceMode);
 104         GET_FUNC(ExtEscape);
 105         GET_FUNC(ExtFloodFill);
 106         GET_FUNC(ExtSelectClipRgn);
 107         GET_FUNC(ExtTextOut);
 108         GET_FUNC(FillPath);
 109         GET_FUNC(FillRgn);
 110         GET_FUNC(FlattenPath);
 111         GET_FUNC(FrameRgn);
 112         GET_FUNC(GdiComment);
 113         GET_FUNC(GetBitmapBits);
 114         GET_FUNC(GetCharWidth);
 115         GET_FUNC(GetDCOrgEx);
 116         GET_FUNC(GetDIBColorTable);
 117         GET_FUNC(GetDIBits);
 118         GET_FUNC(GetDeviceCaps);
 119         GET_FUNC(GetDeviceGammaRamp);
 120         GET_FUNC(GetNearestColor);
 121         GET_FUNC(GetPixel);
 122         GET_FUNC(GetPixelFormat);
 123         GET_FUNC(GetSystemPaletteEntries);
 124         GET_FUNC(GetTextExtentExPoint);
 125         GET_FUNC(GetTextMetrics);
 126         GET_FUNC(IntersectClipRect);
 127         GET_FUNC(InvertRgn);
 128         GET_FUNC(LineTo);
 129         GET_FUNC(MoveTo);
 130         GET_FUNC(ModifyWorldTransform);
 131         GET_FUNC(OffsetClipRgn);
 132         GET_FUNC(OffsetViewportOrg);
 133         GET_FUNC(OffsetWindowOrg);
 134         GET_FUNC(PaintRgn);
 135         GET_FUNC(PatBlt);
 136         GET_FUNC(Pie);
 137         GET_FUNC(PolyBezier);
 138         GET_FUNC(PolyBezierTo);
 139         GET_FUNC(PolyDraw);
 140         GET_FUNC(PolyPolygon);
 141         GET_FUNC(PolyPolyline);
 142         GET_FUNC(Polygon);
 143         GET_FUNC(Polyline);
 144         GET_FUNC(PolylineTo);
 145         GET_FUNC(RealizeDefaultPalette);
 146         GET_FUNC(RealizePalette);
 147         GET_FUNC(Rectangle);
 148         GET_FUNC(ResetDC);
 149         GET_FUNC(RestoreDC);
 150         GET_FUNC(RoundRect);
 151         GET_FUNC(SaveDC);
 152         GET_FUNC(ScaleViewportExt);
 153         GET_FUNC(ScaleWindowExt);
 154         GET_FUNC(SelectBitmap);
 155         GET_FUNC(SelectBrush);
 156         GET_FUNC(SelectClipPath);
 157         GET_FUNC(SelectFont);
 158         GET_FUNC(SelectPalette);
 159         GET_FUNC(SelectPen);
 160         GET_FUNC(SetArcDirection);
 161         GET_FUNC(SetBitmapBits);
 162         GET_FUNC(SetBkColor);
 163         GET_FUNC(SetBkMode);
 164         GET_FUNC(SetDCBrushColor);
 165         GET_FUNC(SetDCOrg);
 166         GET_FUNC(SetDCPenColor);
 167         GET_FUNC(SetDIBColorTable);
 168         GET_FUNC(SetDIBits);
 169         GET_FUNC(SetDIBitsToDevice);
 170         GET_FUNC(SetDeviceClipping);
 171         GET_FUNC(SetDeviceGammaRamp);
 172         GET_FUNC(SetMapMode);
 173         GET_FUNC(SetMapperFlags);
 174         GET_FUNC(SetPixel);
 175         GET_FUNC(SetPixelFormat);
 176         GET_FUNC(SetPolyFillMode);
 177         GET_FUNC(SetROP2);
 178         GET_FUNC(SetRelAbs);
 179         GET_FUNC(SetStretchBltMode);
 180         GET_FUNC(SetTextAlign);
 181         GET_FUNC(SetTextCharacterExtra);
 182         GET_FUNC(SetTextColor);
 183         GET_FUNC(SetTextJustification);
 184         GET_FUNC(SetViewportExt);
 185         GET_FUNC(SetViewportOrg);
 186         GET_FUNC(SetWindowExt);
 187         GET_FUNC(SetWindowOrg);
 188         GET_FUNC(SetWorldTransform);
 189         GET_FUNC(StartDoc);
 190         GET_FUNC(StartPage);
 191         GET_FUNC(StretchBlt);
 192         GET_FUNC(StretchDIBits);
 193         GET_FUNC(StrokeAndFillPath);
 194         GET_FUNC(StrokePath);
 195         GET_FUNC(SwapBuffers);
 196         GET_FUNC(WidenPath);
 197
 198         /* OpenGL32 */
 199         GET_FUNC(wglCreateContext);
 200         GET_FUNC(wglDeleteContext);
 201         GET_FUNC(wglMakeCurrent);
 202         GET_FUNC(wglShareLists);
 203         GET_FUNC(wglUseFontBitmapsA);
 204         GET_FUNC(wglUseFontBitmapsW);
 205 #undef GET_FUNC
 206     }
 207     else memset( &driver->funcs, 0, sizeof(driver->funcs) );
 208
 209     /* add it to the list */
 210     driver->prev = NULL;
 211     if ((driver->next = first_driver)) driver->next->prev = driver;
 212     first_driver = driver;
 213     return driver;
 214 }
 215
 216
 217 /**********************************************************************
 218  *           load_display_driver
 219  *
 220  * Special case for loading the display driver: get the name from the config file
 221  */
 222 static struct graphics_driver *load_display_driver(void)
 223 {
 224     char buffer[MAX_PATH], libname[32], *name, *next;
 225     HMODULE module = 0;
 226     HKEY hkey;
 227
 228     if (display_driver)  /* already loaded */
 229     {
 230         display_driver->count++;
 231         return display_driver;
 232     }
 233
 234     strcpy( buffer, "x11" );  /* default value */
 235     /* @@ Wine registry key: HKCU\Software\Wine\Drivers */
 236     if (!RegOpenKeyA( HKEY_CURRENT_USER, "Software\\Wine\\Drivers", &hkey ))
 237     {
 238         DWORD type, count = sizeof(buffer);
 239         RegQueryValueExA( hkey, "Graphics", 0, &type, (LPBYTE) buffer, &count );
 240         RegCloseKey( hkey );
 241     }
 242
 243     name = buffer;
 244     while (name)
 245     {
 246         next = strchr( name, ',' );
 247         if (next) *next++ = 0;
 248
 249         snprintf( libname, sizeof(libname), "wine%s.drv", name );
 250         if ((module = LoadLibraryA( libname )) != 0) break;
 251         name = next;
 252     }
 253
 254     if (!(display_driver = create_driver( module )))
 255     {
 256         MESSAGE( "Could not create graphics driver '%s'\n", buffer );
 257         FreeLibrary( module );
 258         ExitProcess(1);
 259     }
 260
 261     display_driver->count++;  /* we don't want to free it */
 262     return display_driver;
 263 }
 264
 265
 266 /**********************************************************************
 267  *           DRIVER_load_driver
 268  */
 269 const DC_FUNCTIONS *DRIVER_load_driver( LPCWSTR name )
 270 {
 271     HMODULE module;
 272     struct graphics_driver *driver;
 273     static const WCHAR displayW[] = { 'd','i','s','p','l','a','y',0 };
 274     static const WCHAR display1W[] = {'\\','\\','.','\\','D','I','S','P','L','A','Y','1',0};
 275
 276     EnterCriticalSection( &driver_section );
 277
 278     /* display driver is a special case */
 279     if (!strcmpiW( name, displayW ) ||
 280         !strcmpiW( name, display1W ))
 281     {
 282         driver = load_display_driver();
 283         LeaveCriticalSection( &driver_section );
 284         return &driver->funcs;
 285     }
 286
 287     if ((module = GetModuleHandleW( name )))
 288     {
 289         for (driver = first_driver; driver; driver = driver->next)
 290         {
 291             if (driver->module == module)
 292             {
 293                 driver->count++;
 294                 LeaveCriticalSection( &driver_section );
 295                 return &driver->funcs;
 296             }
 297         }
 298     }
 299
 300     if (!(module = LoadLibraryW( name )))
 301     {
 302         LeaveCriticalSection( &driver_section );
 303         return NULL;
 304     }
 305
 306     if (!(driver = create_driver( module )))
 307     {
 308         FreeLibrary( module );
 309         LeaveCriticalSection( &driver_section );
 310         return NULL;
 311     }
 312
 313     TRACE( "loaded driver %p for %s\n", driver, debugstr_w(name) );
 314     LeaveCriticalSection( &driver_section );
 315     return &driver->funcs;
 316 }
 317
 318
 319 /**********************************************************************
 320  *           DRIVER_get_driver
 321  *
 322  * Get a new copy of an existing driver.
 323  */
 324 const DC_FUNCTIONS *DRIVER_get_driver( const DC_FUNCTIONS *funcs )
 325 {
 326     struct graphics_driver *driver;
 327
 328     EnterCriticalSection( &driver_section );
 329     for (driver = first_driver; driver; driver = driver->next)
 330         if (&driver->funcs == funcs) break;
 331     if (!driver) ERR( "driver not found, trouble ahead\n" );
 332     driver->count++;
 333     LeaveCriticalSection( &driver_section );
 334     return funcs;
 335 }
 336
 337
 338 /**********************************************************************
 339  *           DRIVER_release_driver
 340  *
 341  * Release a driver by decrementing ref count and freeing it if needed.
 342  */
 343 void DRIVER_release_driver( const DC_FUNCTIONS *funcs )
 344 {
 345     struct graphics_driver *driver;
 346
 347     EnterCriticalSection( &driver_section );
 348
 349     for (driver = first_driver; driver; driver = driver->next)
 350         if (&driver->funcs == funcs) break;
 351
 352     if (!driver) goto done;
 353     if (--driver->count) goto done;
 354
 355     /* removed last reference, free it */
 356     if (driver->next) driver->next->prev = driver->prev;
 357     if (driver->prev) driver->prev->next = driver->next;
 358     else first_driver = driver->next;
 359     if (driver == display_driver) display_driver = NULL;
 360
 361     FreeLibrary( driver->module );
 362     HeapFree( GetProcessHeap(), 0, driver );
 363  done:
 364     LeaveCriticalSection( &driver_section );
 365 }
 366
 367
 368 /*****************************************************************************
 369  *      DRIVER_GetDriverName
 370  *
 371  */
 372 BOOL DRIVER_GetDriverName( LPCWSTR device, LPWSTR driver, DWORD size )
 373 {
 374     static const WCHAR displayW[] = { 'd','i','s','p','l','a','y',0 };
 375     static const WCHAR devicesW[] = { 'd','e','v','i','c','e','s',0 };
 376     static const WCHAR display1W[] = {'\\','\\','.','\\','D','I','S','P','L','A','Y','1',0};
 377     static const WCHAR empty_strW[] = { 0 };
 378     WCHAR *p;
 379
 380     /* display is a special case */
 381     if (!strcmpiW( device, displayW ) ||
 382         !strcmpiW( device, display1W ))
 383     {
 384         lstrcpynW( driver, displayW, size );
 385         return TRUE;
 386     }
 387
 388     size = GetProfileStringW(devicesW, device, empty_strW, driver, size);
 389     if(!size) {
 390         WARN("Unable to find %s in [devices] section of win.ini\n", debugstr_w(device));
 391         return FALSE;
 392     }
 393     p = strchrW(driver, ',');
 394     if(!p)
 395     {
 396         WARN("%s entry in [devices] section of win.ini is malformed.\n", debugstr_w(device));
 397         return FALSE;
 398     }
 399     *p = 0;
 400     TRACE("Found %s for %s\n", debugstr_w(driver), debugstr_w(device));
 401     return TRUE;
 402 }
 403
 404
 405 /***********************************************************************
 406  *           GdiConvertToDevmodeW    (GDI32.@)
 407  */
 408 DEVMODEW * WINAPI GdiConvertToDevmodeW(const DEVMODEA *dmA)
 409 {
 410     DEVMODEW *dmW;
 411     WORD dmW_size;
 412
 413     dmW_size = dmA->dmSize + CCHDEVICENAME;
 414     if (dmA->dmSize >= (const char *)dmA->dmFormName - (const char *)dmA + CCHFORMNAME)
 415         dmW_size += CCHFORMNAME;
 416
 417     dmW = HeapAlloc(GetProcessHeap(), 0, dmW_size + dmA->dmDriverExtra);
 418     if (!dmW) return NULL;
 419
 420     MultiByteToWideChar(CP_ACP, 0, (const char*) dmA->dmDeviceName, CCHDEVICENAME,
 421                                    dmW->dmDeviceName, CCHDEVICENAME);
 422     /* copy slightly more, to avoid long computations */
 423     memcpy(&dmW->dmSpecVersion, &dmA->dmSpecVersion, dmA->dmSize - CCHDEVICENAME);
 424
 425     if (dmA->dmSize >= (const char *)dmA->dmFormName - (const char *)dmA + CCHFORMNAME)
 426     {
 427         MultiByteToWideChar(CP_ACP, 0, (const char*) dmA->dmFormName, CCHFORMNAME,
 428                                        dmW->dmFormName, CCHFORMNAME);
 429         if (dmA->dmSize > (const char *)&dmA->dmLogPixels - (const char *)dmA)
 430             memcpy(&dmW->dmLogPixels, &dmA->dmLogPixels, dmA->dmSize - ((const char *)&dmA->dmLogPixels - (const char *)dmA));
 431     }
 432
 433     if (dmA->dmDriverExtra)
 434         memcpy((char *)dmW + dmW_size, (const char *)dmA + dmA->dmSize, dmA->dmDriverExtra);
 435
 436     dmW->dmSize = dmW_size;
 437
 438     return dmW;
 439 }
 440
 441
 442 /*****************************************************************************
 443  *      @ [GDI32.100]
 444  *
 445  * This should thunk to 16-bit and simply call the proc with the given args.
 446  */
 447 INT WINAPI GDI_CallDevInstall16( FARPROC16 lpfnDevInstallProc, HWND hWnd,
 448                                  LPSTR lpModelName, LPSTR OldPort, LPSTR NewPort )
 449 {
 450     FIXME("(%p, %p, %s, %s, %s)\n", lpfnDevInstallProc, hWnd, lpModelName, OldPort, NewPort );
 451     return -1;
 452 }
 453
 454 /*****************************************************************************
 455  *      @ [GDI32.101]
 456  *
 457  * This should load the correct driver for lpszDevice and calls this driver's
 458  * ExtDeviceModePropSheet proc.
 459  *
 460  * Note: The driver calls a callback routine for each property sheet page; these
 461  * pages are supposed to be filled into the structure pointed to by lpPropSheet.
 462  * The layout of this structure is:
 463  *
 464  * struct
 465  * {
 466  *   DWORD  nPages;
 467  *   DWORD  unknown;
 468  *   HPROPSHEETPAGE  pages[10];
 469  * };
 470  */
 471 INT WINAPI GDI_CallExtDeviceModePropSheet16( HWND hWnd, LPCSTR lpszDevice,
 472                                              LPCSTR lpszPort, LPVOID lpPropSheet )
 473 {
 474     FIXME("(%p, %s, %s, %p)\n", hWnd, lpszDevice, lpszPort, lpPropSheet );
 475     return -1;
 476 }
 477
 478 /*****************************************************************************
 479  *      @ [GDI32.102]
 480  *
 481  * This should load the correct driver for lpszDevice and calls this driver's
 482  * ExtDeviceMode proc.
 483  *
 484  * FIXME: convert ExtDeviceMode to unicode in the driver interface
 485  */
 486 INT WINAPI GDI_CallExtDeviceMode16( HWND hwnd,
 487                                     LPDEVMODEA lpdmOutput, LPSTR lpszDevice,
 488                                     LPSTR lpszPort, LPDEVMODEA lpdmInput,
 489                                     LPSTR lpszProfile, DWORD fwMode )
 490 {
 491     WCHAR deviceW[300];
 492     WCHAR bufW[300];
 493     char buf[300];
 494     HDC hdc;
 495     DC *dc;
 496     INT ret = -1;
 497     INT (*pExtDeviceMode)(LPSTR,HWND,LPDEVMODEA,LPSTR,LPSTR,LPDEVMODEA,LPSTR,DWORD);
 498
 499     TRACE("(%p, %p, %s, %s, %p, %s, %d)\n",
 500           hwnd, lpdmOutput, lpszDevice, lpszPort, lpdmInput, lpszProfile, fwMode );
 501
 502     if (!lpszDevice) return -1;
 503     if (!MultiByteToWideChar(CP_ACP, 0, lpszDevice, -1, deviceW, 300)) return -1;
 504
 505     if(!DRIVER_GetDriverName( deviceW, bufW, 300 )) return -1;
 506
 507     if (!WideCharToMultiByte(CP_ACP, 0, bufW, -1, buf, 300, NULL, NULL)) return -1;
 508
 509     if (!(hdc = CreateICA( buf, lpszDevice, lpszPort, NULL ))) return -1;
 510
 511     if ((dc = DC_GetDCPtr( hdc )))
 512     {
 513         pExtDeviceMode = dc->funcs->pExtDeviceMode;
 514         GDI_ReleaseObj( hdc );
 515         if (pExtDeviceMode)
 516             ret = pExtDeviceMode(buf, hwnd, lpdmOutput, lpszDevice, lpszPort,
 517                                             lpdmInput, lpszProfile, fwMode);
 518     }
 519     DeleteDC( hdc );
 520     return ret;
 521 }
 522
 523 /****************************************************************************
 524  *      @ [GDI32.103]
 525  *
 526  * This should load the correct driver for lpszDevice and calls this driver's
 527  * AdvancedSetupDialog proc.
 528  */
 529 INT WINAPI GDI_CallAdvancedSetupDialog16( HWND hwnd, LPSTR lpszDevice,
 530                                           LPDEVMODEA devin, LPDEVMODEA devout )
 531 {
 532     TRACE("(%p, %s, %p, %p)\n", hwnd, lpszDevice, devin, devout );
 533     return -1;
 534 }
 535
 536 /*****************************************************************************
 537  *      @ [GDI32.104]
 538  *
 539  * This should load the correct driver for lpszDevice and calls this driver's
 540  * DeviceCapabilities proc.
 541  *
 542  * FIXME: convert DeviceCapabilities to unicode in the driver interface
 543  */
 544 DWORD WINAPI GDI_CallDeviceCapabilities16( LPCSTR lpszDevice, LPCSTR lpszPort,
 545                                            WORD fwCapability, LPSTR lpszOutput,
 546                                            LPDEVMODEA lpdm )
 547 {
 548     WCHAR deviceW[300];
 549     WCHAR bufW[300];
 550     char buf[300];
 551     HDC hdc;
 552     DC *dc;
 553     INT ret = -1;
 554
 555     TRACE("(%s, %s, %d, %p, %p)\n", lpszDevice, lpszPort, fwCapability, lpszOutput, lpdm );
 556
 557     if (!lpszDevice) return -1;
 558     if (!MultiByteToWideChar(CP_ACP, 0, lpszDevice, -1, deviceW, 300)) return -1;
 559
 560     if(!DRIVER_GetDriverName( deviceW, bufW, 300 )) return -1;
 561
 562     if (!WideCharToMultiByte(CP_ACP, 0, bufW, -1, buf, 300, NULL, NULL)) return -1;
 563
 564     if (!(hdc = CreateICA( buf, lpszDevice, lpszPort, NULL ))) return -1;
 565
 566     if ((dc = DC_GetDCPtr( hdc )))
 567     {
 568         if (dc->funcs->pDeviceCapabilities)
 569             ret = dc->funcs->pDeviceCapabilities( buf, lpszDevice, lpszPort,
 570                                                   fwCapability, lpszOutput, lpdm );
 571         GDI_ReleaseObj( hdc );
 572     }
 573     DeleteDC( hdc );
 574     return ret;
 575 }
 576
 577
 578 /************************************************************************
 579  *             Escape  [GDI32.@]
 580  */
 581 INT WINAPI Escape( HDC hdc, INT escape, INT in_count, LPCSTR in_data, LPVOID out_data )
 582 {
 583     INT ret;
 584     POINT *pt;
 585
 586     switch (escape)
 587     {
 588     case ABORTDOC:
 589         return AbortDoc( hdc );
 590
 591     case ENDDOC:
 592         return EndDoc( hdc );
 593
 594     case GETPHYSPAGESIZE:
 595         pt = out_data;
 596         pt->x = GetDeviceCaps( hdc, PHYSICALWIDTH );
 597         pt->y = GetDeviceCaps( hdc, PHYSICALHEIGHT );
 598         return 1;
 599
 600     case GETPRINTINGOFFSET:
 601         pt = out_data;
 602         pt->x = GetDeviceCaps( hdc, PHYSICALOFFSETX );
 603         pt->y = GetDeviceCaps( hdc, PHYSICALOFFSETY );
 604         return 1;
 605
 606     case GETSCALINGFACTOR:
 607         pt = out_data;
 608         pt->x = GetDeviceCaps( hdc, SCALINGFACTORX );
 609         pt->y = GetDeviceCaps( hdc, SCALINGFACTORY );
 610         return 1;
 611
 612     case NEWFRAME:
 613         return EndPage( hdc );
 614
 615     case SETABORTPROC:
 616         return SetAbortProc( hdc, (ABORTPROC)in_data );
 617
 618     case STARTDOC:
 619         {
 620             DOCINFOA doc;
 621             char *name = NULL;
 622
 623             /* in_data may not be 0 terminated so we must copy it */
 624             if (in_data)
 625             {
 626                 name = HeapAlloc( GetProcessHeap(), 0, in_count+1 );
 627                 memcpy( name, in_data, in_count );
 628                 name[in_count] = 0;
 629             }
 630             /* out_data is actually a pointer to the DocInfo structure and used as
 631              * a second input parameter */
 632             if (out_data) doc = *(DOCINFOA *)out_data;
 633             else
 634             {
 635                 doc.cbSize = sizeof(doc);
 636                 doc.lpszOutput = NULL;
 637                 doc.lpszDatatype = NULL;
 638                 doc.fwType = 0;
 639             }
 640             doc.lpszDocName = name;
 641             ret = StartDocA( hdc, &doc );
 642             HeapFree( GetProcessHeap(), 0, name );
 643             if (ret > 0) ret = StartPage( hdc );
 644             return ret;
 645         }
 646
 647     case QUERYESCSUPPORT:
 648         {
 649             const INT *ptr = (const INT *)in_data;
 650             if (in_count < sizeof(INT)) return 0;
 651             switch(*ptr)
 652             {
 653             case ABORTDOC:
 654             case ENDDOC:
 655             case GETPHYSPAGESIZE:
 656             case GETPRINTINGOFFSET:
 657             case GETSCALINGFACTOR:
 658             case NEWFRAME:
 659             case QUERYESCSUPPORT:
 660             case SETABORTPROC:
 661             case STARTDOC:
 662                 return TRUE;
 663             }
 664             break;
 665         }
 666     }
 667
 668     /* if not handled internally, pass it to the driver */
 669     return ExtEscape( hdc, escape, in_count, in_data, 0, out_data );
 670 }
 671
 672
 673 /******************************************************************************
 674  *              ExtEscape       [GDI32.@]
 675  *
 676  * Access capabilities of a particular device that are not available through GDI.
 677  *
 678  * PARAMS
 679  *    hdc         [I] Handle to device context
 680  *    nEscape     [I] Escape function
 681  *    cbInput     [I] Number of bytes in input structure
 682  *    lpszInData  [I] Pointer to input structure
 683  *    cbOutput    [I] Number of bytes in output structure
 684  *    lpszOutData [O] Pointer to output structure
 685  *
 686  * RETURNS
 687  *    Success: >0
 688  *    Not implemented: 0
 689  *    Failure: <0
 690  */
 691 INT WINAPI ExtEscape( HDC hdc, INT nEscape, INT cbInput, LPCSTR lpszInData,
 692                       INT cbOutput, LPSTR lpszOutData )
 693 {
 694     INT ret = 0;
 695     DC * dc = DC_GetDCPtr( hdc );
 696     if (dc)
 697     {
 698         if (dc->funcs->pExtEscape)
 699             ret = dc->funcs->pExtEscape( dc->physDev, nEscape, cbInput, lpszInData, cbOutput, lpszOutData );
 700         GDI_ReleaseObj( hdc );
 701     }
 702     return ret;
 703 }
 704
 705
 706 /*******************************************************************
 707  *      DrawEscape [GDI32.@]
 708  *
 709  *
 710  */
 711 INT WINAPI DrawEscape(HDC hdc, INT nEscape, INT cbInput, LPCSTR lpszInData)
 712 {
 713     FIXME("DrawEscape, stub\n");
 714     return 0;
 715 }