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 "config.h"
  11
  12 #include "windef.h"
  13 #include "wingdi.h"
  14 #include "wine/wingdi16.h"
  15 #include "path.h"
  16 #include <math.h>
  17
  18   /* GDI objects magic numbers */
  19 #define FIRST_MAGIC           0x4f47
  20 #define PEN_MAGIC             0x4f47
  21 #define BRUSH_MAGIC           0x4f48
  22 #define FONT_MAGIC            0x4f49
  23 #define PALETTE_MAGIC         0x4f4a
  24 #define BITMAP_MAGIC          0x4f4b
  25 #define REGION_MAGIC          0x4f4c
  26 #define DC_MAGIC              0x4f4d
  27 #define DISABLED_DC_MAGIC     0x4f4e
  28 #define META_DC_MAGIC         0x4f4f
  29 #define METAFILE_MAGIC        0x4f50
  30 #define METAFILE_DC_MAGIC     0x4f51
  31 #define ENHMETAFILE_MAGIC     0x4f52
  32 #define ENHMETAFILE_DC_MAGIC  0x4f53
  33 #define LAST_MAGIC            0x4f53
  34
  35 #define MAGIC_DONTCARE        0xffff
  36
  37 /* GDI constants for making objects private/system (naming undoc. !) */
  38 #define OBJECT_PRIVATE        0x2000
  39 #define OBJECT_NOSYSTEM       0x8000
  40
  41 #define GDIMAGIC(magic) ((magic) & ~(OBJECT_PRIVATE|OBJECT_NOSYSTEM))
  42
  43 typedef struct tagGDIOBJHDR
  44 {
  45     HANDLE16    hNext;
  46     WORD        wMagic;
  47     DWORD       dwCount;
  48 } GDIOBJHDR;
  49
  50
  51 typedef BOOL16 CALLBACK (*DCHOOKPROC)(HDC16,WORD,DWORD,LPARAM);
  52
  53 typedef struct tagGdiFont *GdiFont;
  54
  55 typedef struct tagDC
  56 {
  57     GDIOBJHDR    header;
  58     HDC          hSelf;            /* Handle to this DC */
  59     const struct tagDC_FUNCS *funcs; /* DC function table */
  60     void         *physDev;         /* Physical device (driver-specific) */
  61     INT          saveLevel;
  62     DWORD        dwHookData;
  63     FARPROC16    hookProc;         /* the original SEGPTR ... */
  64     DCHOOKPROC   hookThunk;        /* ... and the thunk to call it */
  65
  66     INT          wndOrgX;          /* Window origin */
  67     INT          wndOrgY;
  68     INT          wndExtX;          /* Window extent */
  69     INT          wndExtY;
  70     INT          vportOrgX;        /* Viewport origin */
  71     INT          vportOrgY;
  72     INT          vportExtX;        /* Viewport extent */
  73     INT          vportExtY;
  74
  75     int           flags;
  76     HRGN16        hClipRgn;     /* Clip region (may be 0) */
  77     HRGN16        hVisRgn;      /* Visible region (must never be 0) */
  78     HRGN16        hGCClipRgn;   /* GC clip region (ClipRgn AND VisRgn) */
  79     HPEN16        hPen;
  80     HBRUSH16      hBrush;
  81     HFONT16       hFont;
  82     HBITMAP16     hBitmap;
  83     HANDLE16      hDevice;
  84     HPALETTE16    hPalette;
  85
  86     GdiFont       gdiFont;
  87     GdiPath       path;
  88
  89     WORD          ROPmode;
  90     WORD          polyFillMode;
  91     WORD          stretchBltMode;
  92     WORD          relAbsMode;
  93     WORD          backgroundMode;
  94     COLORREF      backgroundColor;
  95     COLORREF      textColor;
  96     short         brushOrgX;
  97     short         brushOrgY;
  98
  99     WORD          textAlign;         /* Text alignment from SetTextAlign() */
 100     short         charExtra;         /* Spacing from SetTextCharacterExtra() */
 101     short         breakTotalExtra;   /* Total extra space for justification */
 102     short         breakCount;        /* Break char. count */
 103     short         breakExtra;        /* breakTotalExtra / breakCount */
 104     short         breakRem;          /* breakTotalExtra % breakCount */
 105
 106     RECT          totalExtent;
 107     BYTE          bitsPerPixel;
 108
 109     INT           MapMode;
 110     INT           GraphicsMode;      /* Graphics mode */
 111     INT           DCOrgX;            /* DC origin */
 112     INT           DCOrgY;
 113     ABORTPROC     pAbortProc;        /* AbortProc for Printing */
 114     INT           CursPosX;          /* Current position */
 115     INT           CursPosY;
 116     INT           ArcDirection;
 117     XFORM         xformWorld2Wnd;    /* World-to-window transformation */
 118     XFORM         xformWorld2Vport;  /* World-to-viewport transformation */
 119     XFORM         xformVport2World;  /* Inverse of the above transformation */
 120     BOOL          vport2WorldValid;  /* Is xformVport2World valid? */
 121 } DC;
 122
 123 /* Device functions for the Wine driver interface */
 124
 125 typedef INT (*DEVICEFONTENUMPROC)(LPENUMLOGFONTEXW,LPNEWTEXTMETRICEXW,DWORD,
 126                                   LPARAM);
 127
 128 typedef struct tagDC_FUNCS
 129 {
 130     INT      (*pAbortDoc)(DC*);
 131     BOOL     (*pAbortPath)(DC*);
 132     BOOL     (*pAngleArc)(DC*,INT,INT,DWORD,FLOAT,FLOAT);
 133     BOOL     (*pArc)(DC*,INT,INT,INT,INT,INT,INT,INT,INT);
 134     BOOL     (*pArcTo)(DC*,INT,INT,INT,INT,INT,INT,INT,INT);
 135     BOOL     (*pBeginPath)(DC*);
 136     BOOL     (*pBitBlt)(DC*,INT,INT,INT,INT,DC*,INT,INT,DWORD);
 137     LONG     (*pBitmapBits)(HBITMAP,void*,LONG,WORD);
 138     INT      (*pChoosePixelFormat)(DC*,const PIXELFORMATDESCRIPTOR *);
 139     BOOL     (*pChord)(DC*,INT,INT,INT,INT,INT,INT,INT,INT);
 140     BOOL     (*pCloseFigure)(DC*);
 141     BOOL     (*pCreateBitmap)(HBITMAP);
 142     BOOL     (*pCreateDC)(DC*,LPCSTR,LPCSTR,LPCSTR,const DEVMODEA*);
 143     HBITMAP  (*pCreateDIBSection)(DC *,BITMAPINFO *,UINT,LPVOID *,HANDLE,
 144                                   DWORD,DWORD);
 145     BOOL     (*pDeleteDC)(DC*);
 146     BOOL     (*pDeleteObject)(HGDIOBJ);
 147     INT      (*pDescribePixelFormat)(DC *,INT,UINT,PIXELFORMATDESCRIPTOR *);
 148     DWORD    (*pDeviceCapabilities)(LPSTR,LPCSTR,LPCSTR,WORD,LPSTR,LPDEVMODEA);
 149     BOOL     (*pEllipse)(DC*,INT,INT,INT,INT);
 150     INT      (*pEndDoc)(DC*);
 151     INT      (*pEndPage)(DC*);
 152     BOOL     (*pEndPath)(DC*);
 153     BOOL     (*pEnumDeviceFonts)(HDC,LPLOGFONTW,DEVICEFONTENUMPROC,LPARAM);
 154     INT      (*pExcludeClipRect)(DC*,INT,INT,INT,INT);
 155     INT      (*pExtDeviceMode)(LPSTR,HWND,LPDEVMODEA,LPSTR,LPSTR,LPDEVMODEA,LPSTR,DWORD);
 156     INT      (*pExtEscape)(DC*,INT,INT,LPCVOID,INT,LPVOID);
 157     BOOL     (*pExtFloodFill)(DC*,INT,INT,COLORREF,UINT);
 158     BOOL     (*pExtTextOut)(DC*,INT,INT,UINT,const RECT*,LPCWSTR,UINT,
 159                             const INT*);
 160     BOOL     (*pFillPath)(DC*);
 161     BOOL     (*pFillRgn)(DC*,HRGN,HBRUSH);
 162     BOOL     (*pFlattenPath)(DC*);
 163     BOOL     (*pFrameRgn)(DC*,HRGN,HBRUSH,INT,INT);
 164     BOOL     (*pGetCharWidth)(DC*,UINT,UINT,LPINT);
 165     BOOL     (*pGetDCOrgEx)(DC*,LPPOINT);
 166     INT      (*pGetDeviceCaps)(DC*,INT);
 167     BOOL     (*pGetDeviceGammaRamp)(DC*,LPVOID);
 168     COLORREF (*pGetPixel)(DC*,INT,INT);
 169     INT      (*pGetPixelFormat)(DC*);
 170     BOOL     (*pGetTextExtentPoint)(DC*,LPCWSTR,INT,LPSIZE);
 171     BOOL     (*pGetTextMetrics)(DC*,TEXTMETRICW*);
 172     INT      (*pIntersectClipRect)(DC*,INT,INT,INT,INT);
 173     BOOL     (*pInvertRgn)(DC*,HRGN);
 174     BOOL     (*pLineTo)(DC*,INT,INT);
 175     BOOL     (*pMoveTo)(DC*,INT,INT);
 176     INT      (*pOffsetClipRgn)(DC*,INT,INT);
 177     BOOL     (*pOffsetViewportOrg)(DC*,INT,INT);
 178     BOOL     (*pOffsetWindowOrg)(DC*,INT,INT);
 179     BOOL     (*pPaintRgn)(DC*,HRGN);
 180     BOOL     (*pPatBlt)(DC*,INT,INT,INT,INT,DWORD);
 181     BOOL     (*pPie)(DC*,INT,INT,INT,INT,INT,INT,INT,INT);
 182     BOOL     (*pPolyBezier)(DC*,const POINT*,DWORD);
 183     BOOL     (*pPolyBezierTo)(DC*,const POINT*,DWORD);
 184     BOOL     (*pPolyDraw)(DC*,const POINT*,const BYTE *,DWORD);
 185     BOOL     (*pPolyPolygon)(DC*,const POINT*,const INT*,UINT);
 186     BOOL     (*pPolyPolyline)(DC*,const POINT*,const DWORD*,DWORD);
 187     BOOL     (*pPolygon)(DC*,const POINT*,INT);
 188     BOOL     (*pPolyline)(DC*,const POINT*,INT);
 189     BOOL     (*pPolylineTo)(DC*,const POINT*,INT);
 190     UINT     (*pRealizePalette)(DC*);
 191     BOOL     (*pRectangle)(DC*,INT,INT,INT,INT);
 192     BOOL     (*pRestoreDC)(DC*,INT);
 193     BOOL     (*pRoundRect)(DC*,INT,INT,INT,INT,INT,INT);
 194     INT      (*pSaveDC)(DC*);
 195     BOOL     (*pScaleViewportExt)(DC*,INT,INT,INT,INT);
 196     BOOL     (*pScaleWindowExt)(DC*,INT,INT,INT,INT);
 197     BOOL     (*pSelectClipPath)(DC*,INT);
 198     INT      (*pSelectClipRgn)(DC*,HRGN);
 199     HANDLE   (*pSelectObject)(DC*,HANDLE);
 200     HPALETTE (*pSelectPalette)(DC*,HPALETTE,BOOL);
 201     COLORREF (*pSetBkColor)(DC*,COLORREF);
 202     INT      (*pSetBkMode)(DC*,INT);
 203     VOID     (*pSetDeviceClipping)(DC*);
 204     BOOL     (*pSetDeviceGammaRamp)(DC*,LPVOID);
 205     INT      (*pSetDIBitsToDevice)(DC*,INT,INT,DWORD,DWORD,INT,INT,UINT,UINT,
 206                                    LPCVOID,const BITMAPINFO*,UINT);
 207     INT      (*pSetMapMode)(DC*,INT);
 208     DWORD    (*pSetMapperFlags)(DC*,DWORD);
 209     COLORREF (*pSetPixel)(DC*,INT,INT,COLORREF);
 210     BOOL     (*pSetPixelFormat)(DC*,INT,const PIXELFORMATDESCRIPTOR *);
 211     INT      (*pSetPolyFillMode)(DC*,INT);
 212     INT      (*pSetROP2)(DC*,INT);
 213     INT      (*pSetRelAbs)(DC*,INT);
 214     INT      (*pSetStretchBltMode)(DC*,INT);
 215     UINT     (*pSetTextAlign)(DC*,UINT);
 216     INT      (*pSetTextCharacterExtra)(DC*,INT);
 217     DWORD    (*pSetTextColor)(DC*,DWORD);
 218     INT      (*pSetTextJustification)(DC*,INT,INT);
 219     BOOL     (*pSetViewportExt)(DC*,INT,INT);
 220     BOOL     (*pSetViewportOrg)(DC*,INT,INT);
 221     BOOL     (*pSetWindowExt)(DC*,INT,INT);
 222     BOOL     (*pSetWindowOrg)(DC*,INT,INT);
 223     INT      (*pStartDoc)(DC*,const DOCINFOA*);
 224     INT      (*pStartPage)(DC*);
 225     BOOL     (*pStretchBlt)(DC*,INT,INT,INT,INT,DC*,INT,INT,INT,INT,DWORD);
 226     INT      (*pStretchDIBits)(DC*,INT,INT,INT,INT,INT,INT,INT,INT,
 227                                const void *,const BITMAPINFO *,UINT,DWORD);
 228     BOOL     (*pStrokeAndFillPath)(DC*);
 229     BOOL     (*pStrokePath)(DC*);
 230     BOOL     (*pSwapBuffers)(DC*);
 231     BOOL     (*pWidenPath)(DC*);
 232 } DC_FUNCTIONS;
 233
 234   /* LoadOEMResource types */
 235 #define OEM_BITMAP  1
 236 #define OEM_CURSOR  2
 237 #define OEM_ICON    3
 238
 239   /* DC hook codes */
 240 #define DCHC_INVALIDVISRGN      0x0001
 241 #define DCHC_DELETEDC           0x0002
 242
 243 #define DCHF_INVALIDATEVISRGN   0x0001
 244 #define DCHF_VALIDATEVISRGN     0x0002
 245
 246   /* DC flags */
 247 #define DC_MEMORY     0x0001   /* It is a memory DC */
 248 #define DC_SAVED      0x0002   /* It is a saved DC */
 249 #define DC_DIRTY      0x0004   /* hVisRgn has to be updated */
 250 #define DC_THUNKHOOK  0x0008   /* DC hook is in the 16-bit code */
 251
 252 #define GDI_HEAP_SIZE 0xffe0
 253
 254 /* extra stock object: default 1x1 bitmap for memory DCs */
 255 #define DEFAULT_BITMAP (STOCK_LAST+1)
 256
 257   /* Device <-> logical coords conversion */
 258
 259 /* A floating point version of the POINT structure */
 260 typedef struct tagFLOAT_POINT
 261 {
 262    FLOAT x, y;
 263 } FLOAT_POINT;
 264
 265 /* Rounds a floating point number to integer. The world-to-viewport
 266  * transformation process is done in floating point internally. This function
 267  * is then used to round these coordinates to integer values.
 268  */
 269 static inline INT WINE_UNUSED GDI_ROUND(FLOAT val)
 270 {
 271    return (int)floor(val + 0.5);
 272 }
 273
 274 /* Performs a viewport-to-world transformation on the specified point (which
 275  * is in floating point format). Returns TRUE if successful, else FALSE.
 276  */
 277 static inline BOOL WINE_UNUSED INTERNAL_DPTOLP_FLOAT(DC *dc, FLOAT_POINT *point)
 278 {
 279     FLOAT x, y;
 280
 281     /* Check that the viewport-to-world transformation is valid */
 282     if (!dc->vport2WorldValid)
 283         return FALSE;
 284
 285     /* Perform the transformation */
 286     x = point->x;
 287     y = point->y;
 288     point->x = x * dc->xformVport2World.eM11 +
 289                y * dc->xformVport2World.eM21 +
 290                dc->xformVport2World.eDx;
 291     point->y = x * dc->xformVport2World.eM12 +
 292                y * dc->xformVport2World.eM22 +
 293                dc->xformVport2World.eDy;
 294
 295     return TRUE;
 296 }
 297
 298 /* Performs a viewport-to-world transformation on the specified point (which
 299  * is in integer format). Returns TRUE if successful, else FALSE.
 300  */
 301 static inline BOOL WINE_UNUSED INTERNAL_DPTOLP(DC *dc, LPPOINT point)
 302 {
 303     FLOAT_POINT floatPoint;
 304
 305     /* Perform operation with floating point */
 306     floatPoint.x=(FLOAT)point->x;
 307     floatPoint.y=(FLOAT)point->y;
 308     if (!INTERNAL_DPTOLP_FLOAT(dc, &floatPoint))
 309         return FALSE;
 310
 311     /* Round to integers */
 312     point->x = GDI_ROUND(floatPoint.x);
 313     point->y = GDI_ROUND(floatPoint.y);
 314
 315     return TRUE;
 316 }
 317
 318 /* Performs a world-to-viewport transformation on the specified point (which
 319  * is in floating point format).
 320  */
 321 static inline void WINE_UNUSED INTERNAL_LPTODP_FLOAT(DC *dc, FLOAT_POINT *point)
 322 {
 323     FLOAT x, y;
 324
 325     /* Perform the transformation */
 326     x = point->x;
 327     y = point->y;
 328     point->x = x * dc->xformWorld2Vport.eM11 +
 329                y * dc->xformWorld2Vport.eM21 +
 330                dc->xformWorld2Vport.eDx;
 331     point->y = x * dc->xformWorld2Vport.eM12 +
 332                y * dc->xformWorld2Vport.eM22 +
 333                dc->xformWorld2Vport.eDy;
 334 }
 335
 336 /* Performs a world-to-viewport transformation on the specified point (which
 337  * is in integer format).
 338  */
 339 static inline void WINE_UNUSED INTERNAL_LPTODP(DC *dc, LPPOINT point)
 340 {
 341     FLOAT_POINT floatPoint;
 342
 343     /* Perform operation with floating point */
 344     floatPoint.x=(FLOAT)point->x;
 345     floatPoint.y=(FLOAT)point->y;
 346     INTERNAL_LPTODP_FLOAT(dc, &floatPoint);
 347
 348     /* Round to integers */
 349     point->x = GDI_ROUND(floatPoint.x);
 350     point->y = GDI_ROUND(floatPoint.y);
 351 }
 352
 353
 354 /* Performs a world-to-viewport transformation on the specified point (which
 355  * is in integer format).
 356  */
 357 static inline INT WINE_UNUSED INTERNAL_XWPTODP(DC *dc, INT x, INT y)
 358 {
 359     FLOAT_POINT floatPoint;
 360
 361     /* Perform operation with floating point */
 362     floatPoint.x=(FLOAT)x;
 363     floatPoint.y=(FLOAT)y;
 364     INTERNAL_LPTODP_FLOAT(dc, &floatPoint);
 365
 366     /* Round to integers */
 367     return GDI_ROUND(floatPoint.x);
 368 }
 369
 370 /* Performs a world-to-viewport transformation on the specified point (which
 371  * is in integer format).
 372  */
 373 static inline INT WINE_UNUSED INTERNAL_YWPTODP(DC *dc, INT x, INT y)
 374 {
 375     FLOAT_POINT floatPoint;
 376
 377     /* Perform operation with floating point */
 378     floatPoint.x=(FLOAT)x;
 379     floatPoint.y=(FLOAT)y;
 380     INTERNAL_LPTODP_FLOAT(dc, &floatPoint);
 381
 382     /* Round to integers */
 383     return GDI_ROUND(floatPoint.y);
 384 }
 385
 386
 387 /* Performs a viewport-to-world transformation on the specified point (which
 388  * is in integer format).
 389  */
 390 static inline INT WINE_UNUSED INTERNAL_XDPTOWP(DC *dc, INT x, INT y)
 391 {
 392     FLOAT_POINT floatPoint;
 393
 394     /* Perform operation with floating point */
 395     floatPoint.x=(FLOAT)x;
 396     floatPoint.y=(FLOAT)y;
 397     INTERNAL_DPTOLP_FLOAT(dc, &floatPoint);
 398
 399     /* Round to integers */
 400     return GDI_ROUND(floatPoint.x);
 401 }
 402
 403 /* Performs a viewport-to-world transformation on the specified point (which
 404  * is in integer format).
 405  */
 406 static inline INT WINE_UNUSED INTERNAL_YDPTOWP(DC *dc, INT x, INT y)
 407 {
 408     FLOAT_POINT floatPoint;
 409
 410     /* Perform operation with floating point */
 411     floatPoint.x=(FLOAT)x;
 412     floatPoint.y=(FLOAT)y;
 413     INTERNAL_DPTOLP_FLOAT(dc, &floatPoint);
 414
 415     /* Round to integers */
 416     return GDI_ROUND(floatPoint.y);
 417 }
 418
 419
 420 #define XDPTOLP(dc,x) \
 421     (MulDiv(((x)-(dc)->vportOrgX), (dc)->wndExtX, (dc)->vportExtX) + (dc)->wndOrgX)
 422 #define YDPTOLP(dc,y) \
 423     (MulDiv(((y)-(dc)->vportOrgY), (dc)->wndExtY, (dc)->vportExtY) + (dc)->wndOrgY)
 424 #define XLPTODP(dc,x) \
 425     (MulDiv(((x)-(dc)->wndOrgX), (dc)->vportExtX, (dc)->wndExtX) + (dc)->vportOrgX)
 426 #define YLPTODP(dc,y) \
 427     (MulDiv(((y)-(dc)->wndOrgY), (dc)->vportExtY, (dc)->wndExtY) + (dc)->vportOrgY)
 428
 429
 430
 431   /* World -> Device size conversion */
 432
 433 /* Performs a world-to-viewport transformation on the specified width (which
 434  * is in floating point format).
 435  */
 436 static inline void WINE_UNUSED INTERNAL_XWSTODS_FLOAT(DC *dc, FLOAT *width)
 437 {
 438     /* Perform the transformation */
 439     *width = *width * dc->xformWorld2Vport.eM11;
 440 }
 441
 442 /* Performs a world-to-viewport transformation on the specified width (which
 443  * is in integer format).
 444  */
 445 static inline INT WINE_UNUSED INTERNAL_XWSTODS(DC *dc, INT width)
 446 {
 447     FLOAT floatWidth;
 448
 449     /* Perform operation with floating point */
 450     floatWidth = (FLOAT)width;
 451     INTERNAL_XWSTODS_FLOAT(dc, &floatWidth);
 452
 453     /* Round to integers */
 454     return GDI_ROUND(floatWidth);
 455 }
 456
 457
 458 /* Performs a world-to-viewport transformation on the specified size (which
 459  * is in floating point format).
 460  */
 461 static inline void WINE_UNUSED INTERNAL_YWSTODS_FLOAT(DC *dc, FLOAT *height)
 462 {
 463     /* Perform the transformation */
 464     *height = *height * dc->xformWorld2Vport.eM22;
 465 }
 466
 467 /* Performs a world-to-viewport transformation on the specified size (which
 468  * is in integer format).
 469  */
 470 static inline INT WINE_UNUSED INTERNAL_YWSTODS(DC *dc, INT height)
 471 {
 472     FLOAT floatHeight;
 473
 474     /* Perform operation with floating point */
 475     floatHeight = (FLOAT)height;
 476     INTERNAL_YWSTODS_FLOAT(dc, &floatHeight);
 477
 478     /* Round to integers */
 479     return GDI_ROUND(floatHeight);
 480 }
 481
 482
 483   /* Device <-> logical size conversion */
 484
 485 #define XDSTOLS(dc,x) \
 486     MulDiv((x), (dc)->wndExtX, (dc)->vportExtX)
 487 #define YDSTOLS(dc,y) \
 488     MulDiv((y), (dc)->wndExtY, (dc)->vportExtY)
 489 #define XLSTODS(dc,x) \
 490     MulDiv((x), (dc)->vportExtX, (dc)->wndExtX)
 491 #define YLSTODS(dc,y) \
 492     MulDiv((y), (dc)->vportExtY, (dc)->wndExtY)
 493
 494   /* GDI local heap */
 495
 496 extern BOOL GDI_Init(void);
 497 extern void *GDI_AllocObject( WORD, WORD, HGDIOBJ * );
 498 extern void *GDI_ReallocObject( WORD, HGDIOBJ, void *obj );
 499 extern BOOL GDI_FreeObject( HGDIOBJ, void *obj );
 500 extern void *GDI_GetObjPtr( HGDIOBJ, WORD );
 501 extern void GDI_ReleaseObj( HGDIOBJ );
 502 extern void GDI_CheckNotLock(void);
 503
 504 extern const DC_FUNCTIONS *DRIVER_load_driver( LPCSTR name );
 505 extern const DC_FUNCTIONS *DRIVER_get_driver( const DC_FUNCTIONS *funcs );
 506 extern void DRIVER_release_driver( const DC_FUNCTIONS *funcs );
 507 extern BOOL DRIVER_GetDriverName( LPCSTR device, LPSTR driver, DWORD size );
 508
 509 extern POINT *GDI_Bezier( const POINT *Points, INT count, INT *nPtsOut );
 510
 511 extern DC * DC_AllocDC( const DC_FUNCTIONS *funcs );
 512 extern DC * DC_GetDCPtr( HDC hdc );
 513 extern DC * DC_GetDCUpdate( HDC hdc );
 514 extern void DC_InitDC( DC * dc );
 515 extern void DC_UpdateXforms( DC * dc );
 516
 517
 518 #define CLIP_INTERSECT 0x0001
 519 #define CLIP_EXCLUDE   0x0002
 520 #define CLIP_KEEPRGN   0x0004
 521
 522 /* objects/clipping.c */
 523 INT CLIPPING_IntersectClipRect( DC * dc, INT left, INT top,
 524                                 INT right, INT bottom, UINT flags );
 525 INT CLIPPING_IntersectVisRect( DC * dc, INT left, INT top,
 526                                INT right, INT bottom, BOOL exclude );
 527 extern void CLIPPING_UpdateGCRegion( DC * dc );
 528
 529 /* objects/enhmetafile.c */
 530 extern HENHMETAFILE EMF_Create_HENHMETAFILE(ENHMETAHEADER *emh, BOOL on_disk );
 531
 532 #endif  /* __WINE_GDI_H */