include/gdi.h

   1 /*
   2  * GDI definitions
   3  *
   4  * Copyright 1993 Alexandre Julliard
   5  */
   6
   7 #ifndef __WINE_GDI_H
   8 #define __WINE_GDI_H
   9
  10 #include "windef.h"
  11 #include "wingdi.h"
  12 #include "wine/wingdi16.h"
  13 #include "path.h"
  14 #include <math.h>
  15
  16   /* GDI objects magic numbers */
  17 #define FIRST_MAGIC           0x4f47
  18 #define PEN_MAGIC             0x4f47
  19 #define BRUSH_MAGIC           0x4f48
  20 #define FONT_MAGIC            0x4f49
  21 #define PALETTE_MAGIC         0x4f4a
  22 #define BITMAP_MAGIC          0x4f4b
  23 #define REGION_MAGIC          0x4f4c
  24 #define DC_MAGIC              0x4f4d
  25 #define DISABLED_DC_MAGIC     0x4f4e
  26 #define META_DC_MAGIC         0x4f4f
  27 #define METAFILE_MAGIC        0x4f50
  28 #define METAFILE_DC_MAGIC     0x4f51
  29 #define ENHMETAFILE_MAGIC     0x4f52
  30 #define ENHMETAFILE_DC_MAGIC  0x4f53
  31 #define LAST_MAGIC            0x4f53
  32
  33 #define MAGIC_DONTCARE        0xffff
  34
  35 /* GDI constants for making objects private/system (naming undoc. !) */
  36 #define OBJECT_PRIVATE        0x2000
  37 #define OBJECT_NOSYSTEM       0x8000
  38
  39 #define GDIMAGIC(magic) ((magic) & ~(OBJECT_PRIVATE|OBJECT_NOSYSTEM))
  40
  41 typedef struct tagGDIOBJHDR
  42 {
  43     HANDLE16    hNext;
  44     WORD        wMagic;
  45     DWORD       dwCount;
  46 } GDIOBJHDR;
  47
  48
  49 typedef struct tagGdiFont *GdiFont;
  50
  51 typedef struct tagDC
  52 {
  53     GDIOBJHDR    header;
  54     HDC          hSelf;            /* Handle to this DC */
  55     const struct tagDC_FUNCS *funcs; /* DC function table */
  56     void         *physDev;         /* Physical device (driver-specific) */
  57     INT          saveLevel;
  58     DWORD        dwHookData;
  59     FARPROC16    hookProc;         /* the original SEGPTR ... */
  60     DCHOOKPROC   hookThunk;        /* ... and the thunk to call it */
  61
  62     INT          wndOrgX;          /* Window origin */
  63     INT          wndOrgY;
  64     INT          wndExtX;          /* Window extent */
  65     INT          wndExtY;
  66     INT          vportOrgX;        /* Viewport origin */
  67     INT          vportOrgY;
  68     INT          vportExtX;        /* Viewport extent */
  69     INT          vportExtY;
  70
  71     int           flags;
  72     HRGN16        hClipRgn;     /* Clip region (may be 0) */
  73     HRGN16        hVisRgn;      /* Visible region (must never be 0) */
  74     HRGN16        hGCClipRgn;   /* GC clip region (ClipRgn AND VisRgn) */
  75     HPEN16        hPen;
  76     HBRUSH16      hBrush;
  77     HFONT16       hFont;
  78     HBITMAP16     hBitmap;
  79     HANDLE16      hDevice;
  80     HPALETTE16    hPalette;
  81
  82     GdiFont       gdiFont;
  83     GdiPath       path;
  84
  85     WORD          ROPmode;
  86     WORD          polyFillMode;
  87     WORD          stretchBltMode;
  88     WORD          relAbsMode;
  89     WORD          backgroundMode;
  90     COLORREF      backgroundColor;
  91     COLORREF      textColor;
  92     short         brushOrgX;
  93     short         brushOrgY;
  94
  95     WORD          textAlign;         /* Text alignment from SetTextAlign() */
  96     short         charExtra;         /* Spacing from SetTextCharacterExtra() */
  97     short         breakTotalExtra;   /* Total extra space for justification */
  98     short         breakCount;        /* Break char. count */
  99     short         breakExtra;        /* breakTotalExtra / breakCount */
 100     short         breakRem;          /* breakTotalExtra % breakCount */
 101
 102     RECT          totalExtent;
 103     BYTE          bitsPerPixel;
 104
 105     INT           MapMode;
 106     INT           GraphicsMode;      /* Graphics mode */
 107     INT           DCOrgX;            /* DC origin */
 108     INT           DCOrgY;
 109     ABORTPROC     pAbortProc;        /* AbortProc for Printing */
 110     ABORTPROC16   pAbortProc16;
 111     INT           CursPosX;          /* Current position */
 112     INT           CursPosY;
 113     INT           ArcDirection;
 114     XFORM         xformWorld2Wnd;    /* World-to-window transformation */
 115     XFORM         xformWorld2Vport;  /* World-to-viewport transformation */
 116     XFORM         xformVport2World;  /* Inverse of the above transformation */
 117     BOOL          vport2WorldValid;  /* Is xformVport2World valid? */
 118 } DC;
 119
 120 /* Device functions for the Wine driver interface */
 121
 122 typedef INT (*DEVICEFONTENUMPROC)(LPENUMLOGFONTEXW,LPNEWTEXTMETRICEXW,DWORD,
 123                                   LPARAM);
 124
 125 typedef struct tagDC_FUNCS
 126 {
 127     INT      (*pAbortDoc)(DC*);
 128     BOOL     (*pAbortPath)(DC*);
 129     BOOL     (*pAngleArc)(DC*,INT,INT,DWORD,FLOAT,FLOAT);
 130     BOOL     (*pArc)(DC*,INT,INT,INT,INT,INT,INT,INT,INT);
 131     BOOL     (*pArcTo)(DC*,INT,INT,INT,INT,INT,INT,INT,INT);
 132     BOOL     (*pBeginPath)(DC*);
 133     BOOL     (*pBitBlt)(DC*,INT,INT,INT,INT,DC*,INT,INT,DWORD);
 134     LONG     (*pBitmapBits)(HBITMAP,void*,LONG,WORD);
 135     INT      (*pChoosePixelFormat)(DC*,const PIXELFORMATDESCRIPTOR *);
 136     BOOL     (*pChord)(DC*,INT,INT,INT,INT,INT,INT,INT,INT);
 137     BOOL     (*pCloseFigure)(DC*);
 138     BOOL     (*pCreateBitmap)(HBITMAP);
 139     BOOL     (*pCreateDC)(DC*,LPCSTR,LPCSTR,LPCSTR,const DEVMODEA*);
 140     HBITMAP  (*pCreateDIBSection)(DC *,BITMAPINFO *,UINT,LPVOID *,HANDLE,
 141                                   DWORD,DWORD);
 142     BOOL     (*pDeleteDC)(DC*);
 143     BOOL     (*pDeleteObject)(HGDIOBJ);
 144     INT      (*pDescribePixelFormat)(DC *,INT,UINT,PIXELFORMATDESCRIPTOR *);
 145     DWORD    (*pDeviceCapabilities)(LPSTR,LPCSTR,LPCSTR,WORD,LPSTR,LPDEVMODEA);
 146     BOOL     (*pEllipse)(DC*,INT,INT,INT,INT);
 147     INT      (*pEndDoc)(DC*);
 148     INT      (*pEndPage)(DC*);
 149     BOOL     (*pEndPath)(DC*);
 150     BOOL     (*pEnumDeviceFonts)(HDC,LPLOGFONTW,DEVICEFONTENUMPROC,LPARAM);
 151     INT      (*pExcludeClipRect)(DC*,INT,INT,INT,INT);
 152     INT      (*pExtDeviceMode)(LPSTR,HWND,LPDEVMODEA,LPSTR,LPSTR,LPDEVMODEA,LPSTR,DWORD);
 153     INT      (*pExtEscape)(DC*,INT,INT,LPCVOID,INT,LPVOID);
 154     BOOL     (*pExtFloodFill)(DC*,INT,INT,COLORREF,UINT);
 155     BOOL     (*pExtTextOut)(DC*,INT,INT,UINT,const RECT*,LPCWSTR,UINT,
 156                             const INT*);
 157     BOOL     (*pFillPath)(DC*);
 158     BOOL     (*pFillRgn)(DC*,HRGN,HBRUSH);
 159     BOOL     (*pFlattenPath)(DC*);
 160     BOOL     (*pFrameRgn)(DC*,HRGN,HBRUSH,INT,INT);
 161     BOOL     (*pGetCharWidth)(DC*,UINT,UINT,LPINT);
 162     BOOL     (*pGetDCOrgEx)(DC*,LPPOINT);
 163     INT      (*pGetDeviceCaps)(DC*,INT);
 164     BOOL     (*pGetDeviceGammaRamp)(DC*,LPVOID);
 165     COLORREF (*pGetPixel)(DC*,INT,INT);
 166     INT      (*pGetPixelFormat)(DC*);
 167     BOOL     (*pGetTextExtentPoint)(DC*,LPCWSTR,INT,LPSIZE);
 168     BOOL     (*pGetTextMetrics)(DC*,TEXTMETRICW*);
 169     INT      (*pIntersectClipRect)(DC*,INT,INT,INT,INT);
 170     BOOL     (*pInvertRgn)(DC*,HRGN);
 171     BOOL     (*pLineTo)(DC*,INT,INT);
 172     BOOL     (*pMoveTo)(DC*,INT,INT);
 173     INT      (*pOffsetClipRgn)(DC*,INT,INT);
 174     BOOL     (*pOffsetViewportOrg)(DC*,INT,INT);
 175     BOOL     (*pOffsetWindowOrg)(DC*,INT,INT);
 176     BOOL     (*pPaintRgn)(DC*,HRGN);
 177     BOOL     (*pPatBlt)(DC*,INT,INT,INT,INT,DWORD);
 178     BOOL     (*pPie)(DC*,INT,INT,INT,INT,INT,INT,INT,INT);
 179     BOOL     (*pPolyBezier)(DC*,const POINT*,DWORD);
 180     BOOL     (*pPolyBezierTo)(DC*,const POINT*,DWORD);
 181     BOOL     (*pPolyDraw)(DC*,const POINT*,const BYTE *,DWORD);
 182     BOOL     (*pPolyPolygon)(DC*,const POINT*,const INT*,UINT);
 183     BOOL     (*pPolyPolyline)(DC*,const POINT*,const DWORD*,DWORD);
 184     BOOL     (*pPolygon)(DC*,const POINT*,INT);
 185     BOOL     (*pPolyline)(DC*,const POINT*,INT);
 186     BOOL     (*pPolylineTo)(DC*,const POINT*,INT);
 187     UINT     (*pRealizePalette)(DC*);
 188     BOOL     (*pRectangle)(DC*,INT,INT,INT,INT);
 189     BOOL     (*pRestoreDC)(DC*,INT);
 190     BOOL     (*pRoundRect)(DC*,INT,INT,INT,INT,INT,INT);
 191     INT      (*pSaveDC)(DC*);
 192     BOOL     (*pScaleViewportExt)(DC*,INT,INT,INT,INT);
 193     BOOL     (*pScaleWindowExt)(DC*,INT,INT,INT,INT);
 194     BOOL     (*pSelectClipPath)(DC*,INT);
 195     INT      (*pSelectClipRgn)(DC*,HRGN);
 196     HANDLE   (*pSelectObject)(DC*,HANDLE);
 197     HPALETTE (*pSelectPalette)(DC*,HPALETTE,BOOL);
 198     COLORREF (*pSetBkColor)(DC*,COLORREF);
 199     INT      (*pSetBkMode)(DC*,INT);
 200     VOID     (*pSetDeviceClipping)(DC*);
 201     BOOL     (*pSetDeviceGammaRamp)(DC*,LPVOID);
 202     INT      (*pSetDIBitsToDevice)(DC*,INT,INT,DWORD,DWORD,INT,INT,UINT,UINT,
 203                                    LPCVOID,const BITMAPINFO*,UINT);
 204     INT      (*pSetMapMode)(DC*,INT);
 205     DWORD    (*pSetMapperFlags)(DC*,DWORD);
 206     COLORREF (*pSetPixel)(DC*,INT,INT,COLORREF);
 207     BOOL     (*pSetPixelFormat)(DC*,INT,const PIXELFORMATDESCRIPTOR *);
 208     INT      (*pSetPolyFillMode)(DC*,INT);
 209     INT      (*pSetROP2)(DC*,INT);
 210     INT      (*pSetRelAbs)(DC*,INT);
 211     INT      (*pSetStretchBltMode)(DC*,INT);
 212     UINT     (*pSetTextAlign)(DC*,UINT);
 213     INT      (*pSetTextCharacterExtra)(DC*,INT);
 214     DWORD    (*pSetTextColor)(DC*,DWORD);
 215     INT      (*pSetTextJustification)(DC*,INT,INT);
 216     BOOL     (*pSetViewportExt)(DC*,INT,INT);
 217     BOOL     (*pSetViewportOrg)(DC*,INT,INT);
 218     BOOL     (*pSetWindowExt)(DC*,INT,INT);
 219     BOOL     (*pSetWindowOrg)(DC*,INT,INT);
 220     INT      (*pStartDoc)(DC*,const DOCINFOA*);
 221     INT      (*pStartPage)(DC*);
 222     BOOL     (*pStretchBlt)(DC*,INT,INT,INT,INT,DC*,INT,INT,INT,INT,DWORD);
 223     INT      (*pStretchDIBits)(DC*,INT,INT,INT,INT,INT,INT,INT,INT,
 224                                const void *,const BITMAPINFO *,UINT,DWORD);
 225     BOOL     (*pStrokeAndFillPath)(DC*);
 226     BOOL     (*pStrokePath)(DC*);
 227     BOOL     (*pSwapBuffers)(DC*);
 228     BOOL     (*pWidenPath)(DC*);
 229 } DC_FUNCTIONS;
 230
 231   /* LoadOEMResource types */
 232 #define OEM_BITMAP  1
 233 #define OEM_CURSOR  2
 234 #define OEM_ICON    3
 235
 236   /* DC hook codes */
 237 #define DCHC_INVALIDVISRGN      0x0001
 238 #define DCHC_DELETEDC           0x0002
 239
 240 #define DCHF_INVALIDATEVISRGN   0x0001
 241 #define DCHF_VALIDATEVISRGN     0x0002
 242
 243   /* DC flags */
 244 #define DC_MEMORY     0x0001   /* It is a memory DC */
 245 #define DC_SAVED      0x0002   /* It is a saved DC */
 246 #define DC_DIRTY      0x0004   /* hVisRgn has to be updated */
 247 #define DC_THUNKHOOK  0x0008   /* DC hook is in the 16-bit code */
 248
 249 #define GDI_HEAP_SIZE 0xffe0
 250
 251 /* extra stock object: default 1x1 bitmap for memory DCs */
 252 #define DEFAULT_BITMAP (STOCK_LAST+1)
 253
 254   /* Device <-> logical coords conversion */
 255
 256 /* A floating point version of the POINT structure */
 257 typedef struct tagFLOAT_POINT
 258 {
 259    FLOAT x, y;
 260 } FLOAT_POINT;
 261
 262 /* Rounds a floating point number to integer. The world-to-viewport
 263  * transformation process is done in floating point internally. This function
 264  * is then used to round these coordinates to integer values.
 265  */
 266 static inline INT WINE_UNUSED GDI_ROUND(FLOAT val)
 267 {
 268    return (int)floor(val + 0.5);
 269 }
 270
 271 /* Performs a viewport-to-world transformation on the specified point (which
 272  * is in floating point format). Returns TRUE if successful, else FALSE.
 273  */
 274 static inline BOOL WINE_UNUSED INTERNAL_DPTOLP_FLOAT(DC *dc, FLOAT_POINT *point)
 275 {
 276     FLOAT x, y;
 277
 278     /* Check that the viewport-to-world transformation is valid */
 279     if (!dc->vport2WorldValid)
 280         return FALSE;
 281
 282     /* Perform the transformation */
 283     x = point->x;
 284     y = point->y;
 285     point->x = x * dc->xformVport2World.eM11 +
 286                y * dc->xformVport2World.eM21 +
 287                dc->xformVport2World.eDx;
 288     point->y = x * dc->xformVport2World.eM12 +
 289                y * dc->xformVport2World.eM22 +
 290                dc->xformVport2World.eDy;
 291
 292     return TRUE;
 293 }
 294
 295 /* Performs a viewport-to-world transformation on the specified point (which
 296  * is in integer format). Returns TRUE if successful, else FALSE.
 297  */
 298 static inline BOOL WINE_UNUSED INTERNAL_DPTOLP(DC *dc, LPPOINT point)
 299 {
 300     FLOAT_POINT floatPoint;
 301
 302     /* Perform operation with floating point */
 303     floatPoint.x=(FLOAT)point->x;
 304     floatPoint.y=(FLOAT)point->y;
 305     if (!INTERNAL_DPTOLP_FLOAT(dc, &floatPoint))
 306         return FALSE;
 307
 308     /* Round to integers */
 309     point->x = GDI_ROUND(floatPoint.x);
 310     point->y = GDI_ROUND(floatPoint.y);
 311
 312     return TRUE;
 313 }
 314
 315 /* Performs a world-to-viewport transformation on the specified point (which
 316  * is in floating point format).
 317  */
 318 static inline void WINE_UNUSED INTERNAL_LPTODP_FLOAT(DC *dc, FLOAT_POINT *point)
 319 {
 320     FLOAT x, y;
 321
 322     /* Perform the transformation */
 323     x = point->x;
 324     y = point->y;
 325     point->x = x * dc->xformWorld2Vport.eM11 +
 326                y * dc->xformWorld2Vport.eM21 +
 327                dc->xformWorld2Vport.eDx;
 328     point->y = x * dc->xformWorld2Vport.eM12 +
 329                y * dc->xformWorld2Vport.eM22 +
 330                dc->xformWorld2Vport.eDy;
 331 }
 332
 333 /* Performs a world-to-viewport transformation on the specified point (which
 334  * is in integer format).
 335  */
 336 static inline void WINE_UNUSED INTERNAL_LPTODP(DC *dc, LPPOINT point)
 337 {
 338     FLOAT_POINT floatPoint;
 339
 340     /* Perform operation with floating point */
 341     floatPoint.x=(FLOAT)point->x;
 342     floatPoint.y=(FLOAT)point->y;
 343     INTERNAL_LPTODP_FLOAT(dc, &floatPoint);
 344
 345     /* Round to integers */
 346     point->x = GDI_ROUND(floatPoint.x);
 347     point->y = GDI_ROUND(floatPoint.y);
 348 }
 349
 350
 351 /* Performs a world-to-viewport transformation on the specified point (which
 352  * is in integer format).
 353  */
 354 static inline INT WINE_UNUSED INTERNAL_XWPTODP(DC *dc, INT x, INT y)
 355 {
 356     FLOAT_POINT floatPoint;
 357
 358     /* Perform operation with floating point */
 359     floatPoint.x=(FLOAT)x;
 360     floatPoint.y=(FLOAT)y;
 361     INTERNAL_LPTODP_FLOAT(dc, &floatPoint);
 362
 363     /* Round to integers */
 364     return GDI_ROUND(floatPoint.x);
 365 }
 366
 367 /* Performs a world-to-viewport transformation on the specified point (which
 368  * is in integer format).
 369  */
 370 static inline INT WINE_UNUSED INTERNAL_YWPTODP(DC *dc, INT x, INT y)
 371 {
 372     FLOAT_POINT floatPoint;
 373
 374     /* Perform operation with floating point */
 375     floatPoint.x=(FLOAT)x;
 376     floatPoint.y=(FLOAT)y;
 377     INTERNAL_LPTODP_FLOAT(dc, &floatPoint);
 378
 379     /* Round to integers */
 380     return GDI_ROUND(floatPoint.y);
 381 }
 382
 383
 384 /* Performs a viewport-to-world transformation on the specified point (which
 385  * is in integer format).
 386  */
 387 static inline INT WINE_UNUSED INTERNAL_XDPTOWP(DC *dc, INT x, INT y)
 388 {
 389     FLOAT_POINT floatPoint;
 390
 391     /* Perform operation with floating point */
 392     floatPoint.x=(FLOAT)x;
 393     floatPoint.y=(FLOAT)y;
 394     INTERNAL_DPTOLP_FLOAT(dc, &floatPoint);
 395
 396     /* Round to integers */
 397     return GDI_ROUND(floatPoint.x);
 398 }
 399
 400 /* Performs a viewport-to-world transformation on the specified point (which
 401  * is in integer format).
 402  */
 403 static inline INT WINE_UNUSED INTERNAL_YDPTOWP(DC *dc, INT x, INT y)
 404 {
 405     FLOAT_POINT floatPoint;
 406
 407     /* Perform operation with floating point */
 408     floatPoint.x=(FLOAT)x;
 409     floatPoint.y=(FLOAT)y;
 410     INTERNAL_DPTOLP_FLOAT(dc, &floatPoint);
 411
 412     /* Round to integers */
 413     return GDI_ROUND(floatPoint.y);
 414 }
 415
 416
 417 #define XDPTOLP(dc,x) \
 418     (MulDiv(((x)-(dc)->vportOrgX), (dc)->wndExtX, (dc)->vportExtX) + (dc)->wndOrgX)
 419 #define YDPTOLP(dc,y) \
 420     (MulDiv(((y)-(dc)->vportOrgY), (dc)->wndExtY, (dc)->vportExtY) + (dc)->wndOrgY)
 421 #define XLPTODP(dc,x) \
 422     (MulDiv(((x)-(dc)->wndOrgX), (dc)->vportExtX, (dc)->wndExtX) + (dc)->vportOrgX)
 423 #define YLPTODP(dc,y) \
 424     (MulDiv(((y)-(dc)->wndOrgY), (dc)->vportExtY, (dc)->wndExtY) + (dc)->vportOrgY)
 425
 426
 427
 428   /* World -> Device size conversion */
 429
 430 /* Performs a world-to-viewport transformation on the specified width (which
 431  * is in floating point format).
 432  */
 433 static inline void WINE_UNUSED INTERNAL_XWSTODS_FLOAT(DC *dc, FLOAT *width)
 434 {
 435     /* Perform the transformation */
 436     *width = *width * dc->xformWorld2Vport.eM11;
 437 }
 438
 439 /* Performs a world-to-viewport transformation on the specified width (which
 440  * is in integer format).
 441  */
 442 static inline INT WINE_UNUSED INTERNAL_XWSTODS(DC *dc, INT width)
 443 {
 444     FLOAT floatWidth;
 445
 446     /* Perform operation with floating point */
 447     floatWidth = (FLOAT)width;
 448     INTERNAL_XWSTODS_FLOAT(dc, &floatWidth);
 449
 450     /* Round to integers */
 451     return GDI_ROUND(floatWidth);
 452 }
 453
 454
 455 /* Performs a world-to-viewport transformation on the specified size (which
 456  * is in floating point format).
 457  */
 458 static inline void WINE_UNUSED INTERNAL_YWSTODS_FLOAT(DC *dc, FLOAT *height)
 459 {
 460     /* Perform the transformation */
 461     *height = *height * dc->xformWorld2Vport.eM22;
 462 }
 463
 464 /* Performs a world-to-viewport transformation on the specified size (which
 465  * is in integer format).
 466  */
 467 static inline INT WINE_UNUSED INTERNAL_YWSTODS(DC *dc, INT height)
 468 {
 469     FLOAT floatHeight;
 470
 471     /* Perform operation with floating point */
 472     floatHeight = (FLOAT)height;
 473     INTERNAL_YWSTODS_FLOAT(dc, &floatHeight);
 474
 475     /* Round to integers */
 476     return GDI_ROUND(floatHeight);
 477 }
 478
 479
 480   /* Device <-> logical size conversion */
 481
 482 #define XDSTOLS(dc,x) \
 483     MulDiv((x), (dc)->wndExtX, (dc)->vportExtX)
 484 #define YDSTOLS(dc,y) \
 485     MulDiv((y), (dc)->wndExtY, (dc)->vportExtY)
 486 #define XLSTODS(dc,x) \
 487     MulDiv((x), (dc)->vportExtX, (dc)->wndExtX)
 488 #define YLSTODS(dc,y) \
 489     MulDiv((y), (dc)->vportExtY, (dc)->wndExtY)
 490
 491   /* GDI local heap */
 492
 493 extern BOOL GDI_Init(void);
 494 extern void *GDI_AllocObject( WORD, WORD, HGDIOBJ * );
 495 extern void *GDI_ReallocObject( WORD, HGDIOBJ, void *obj );
 496 extern BOOL GDI_FreeObject( HGDIOBJ, void *obj );
 497 extern void *GDI_GetObjPtr( HGDIOBJ, WORD );
 498 extern void GDI_ReleaseObj( HGDIOBJ );
 499 extern void GDI_CheckNotLock(void);
 500
 501 extern const DC_FUNCTIONS *DRIVER_load_driver( LPCSTR name );
 502 extern const DC_FUNCTIONS *DRIVER_get_driver( const DC_FUNCTIONS *funcs );
 503 extern void DRIVER_release_driver( const DC_FUNCTIONS *funcs );
 504 extern BOOL DRIVER_GetDriverName( LPCSTR device, LPSTR driver, DWORD size );
 505
 506 extern POINT *GDI_Bezier( const POINT *Points, INT count, INT *nPtsOut );
 507
 508 extern DC * DC_AllocDC( const DC_FUNCTIONS *funcs );
 509 extern DC * DC_GetDCPtr( HDC hdc );
 510 extern DC * DC_GetDCUpdate( HDC hdc );
 511 extern void DC_InitDC( DC * dc );
 512 extern void DC_UpdateXforms( DC * dc );
 513
 514
 515 #define CLIP_INTERSECT 0x0001
 516 #define CLIP_EXCLUDE   0x0002
 517 #define CLIP_KEEPRGN   0x0004
 518
 519 /* objects/clipping.c */
 520 INT CLIPPING_IntersectClipRect( DC * dc, INT left, INT top,
 521                                 INT right, INT bottom, UINT flags );
 522 INT CLIPPING_IntersectVisRect( DC * dc, INT left, INT top,
 523                                INT right, INT bottom, BOOL exclude );
 524 extern void CLIPPING_UpdateGCRegion( DC * dc );
 525
 526 /* objects/enhmetafile.c */
 527 extern HENHMETAFILE EMF_Create_HENHMETAFILE(ENHMETAHEADER *emh, BOOL on_disk );
 528
 529 #endif  /* __WINE_GDI_H */