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 struct tagDeviceCaps
  52 {
  53     WORD   version;       /*   0: driver version */
  54     WORD   technology;    /*   2: device technology */
  55     WORD   horzSize;      /*   4: width of display in mm */
  56     WORD   vertSize;      /*   6: height of display in mm */
  57     WORD   horzRes;       /*   8: width of display in pixels */
  58     WORD   vertRes;       /*  10: width of display in pixels */
  59     WORD   bitsPixel;     /*  12: bits per pixel */
  60     WORD   planes;        /*  14: color planes */
  61     WORD   numBrushes;    /*  16: device-specific brushes */
  62     WORD   numPens;       /*  18: device-specific pens */
  63     WORD   numMarkers;    /*  20: device-specific markers */
  64     WORD   numFonts;      /*  22: device-specific fonts */
  65     WORD   numColors;     /*  24: size of color table */
  66     WORD   pdeviceSize;   /*  26: size of PDEVICE structure */
  67     WORD   curveCaps;     /*  28: curve capabilities */
  68     WORD   lineCaps;      /*  30: line capabilities */
  69     WORD   polygonalCaps; /*  32: polygon capabilities */
  70     WORD   textCaps;      /*  34: text capabilities */
  71     WORD   clipCaps;      /*  36: clipping capabilities */
  72     WORD   rasterCaps;    /*  38: raster capabilities */
  73     WORD   aspectX;       /*  40: relative width of device pixel */
  74     WORD   aspectY;       /*  42: relative height of device pixel */
  75     WORD   aspectXY;      /*  44: relative diagonal width of device pixel */
  76     WORD   pad1[21];      /*  46-86: reserved */
  77     WORD   logPixelsX;    /*  88: pixels / logical X inch */
  78     WORD   logPixelsY;    /*  90: pixels / logical Y inch */
  79     WORD   pad2[6];       /*  92-102: reserved */
  80     WORD   sizePalette;   /* 104: entries in system palette */
  81     WORD   numReserved;   /* 106: reserved entries */
  82     WORD   colorRes;      /* 108: color resolution */
  83 } DeviceCaps;
  84
  85 typedef BOOL16 CALLBACK (*DCHOOKPROC)(HDC16,WORD,DWORD,LPARAM);
  86
  87 typedef struct tagDC
  88 {
  89     GDIOBJHDR    header;
  90     HDC          hSelf;            /* Handle to this DC */
  91     const struct tagDC_FUNCS *funcs; /* DC function table */
  92     void         *physDev;         /* Physical device (driver-specific) */
  93     INT          saveLevel;
  94     DWORD        dwHookData;
  95     FARPROC16    hookProc;         /* the original SEGPTR ... */
  96     DCHOOKPROC   hookThunk;        /* ... and the thunk to call it */
  97
  98     INT          wndOrgX;          /* Window origin */
  99     INT          wndOrgY;
 100     INT          wndExtX;          /* Window extent */
 101     INT          wndExtY;
 102     INT          vportOrgX;        /* Viewport origin */
 103     INT          vportOrgY;
 104     INT          vportExtX;        /* Viewport extent */
 105     INT          vportExtY;
 106
 107     int           flags;
 108     const DeviceCaps *devCaps;
 109
 110     HRGN16        hClipRgn;     /* Clip region (may be 0) */
 111     HRGN16        hVisRgn;      /* Visible region (must never be 0) */
 112     HRGN16        hGCClipRgn;   /* GC clip region (ClipRgn AND VisRgn) */
 113     HPEN16        hPen;
 114     HBRUSH16      hBrush;
 115     HFONT16       hFont;
 116     HBITMAP16     hBitmap;
 117     HANDLE16      hDevice;
 118     HPALETTE16    hPalette;
 119
 120     GdiPath       path;
 121
 122     WORD          ROPmode;
 123     WORD          polyFillMode;
 124     WORD          stretchBltMode;
 125     WORD          relAbsMode;
 126     WORD          backgroundMode;
 127     COLORREF      backgroundColor;
 128     COLORREF      textColor;
 129     short         brushOrgX;
 130     short         brushOrgY;
 131
 132     WORD          textAlign;         /* Text alignment from SetTextAlign() */
 133     short         charExtra;         /* Spacing from SetTextCharacterExtra() */
 134     short         breakTotalExtra;   /* Total extra space for justification */
 135     short         breakCount;        /* Break char. count */
 136     short         breakExtra;        /* breakTotalExtra / breakCount */
 137     short         breakRem;          /* breakTotalExtra % breakCount */
 138
 139     RECT          totalExtent;
 140     BYTE          bitsPerPixel;
 141
 142     INT           MapMode;
 143     INT           GraphicsMode;      /* Graphics mode */
 144     INT           DCOrgX;            /* DC origin */
 145     INT           DCOrgY;
 146     ABORTPROC     pAbortProc;        /* AbortProc for Printing */
 147     INT           CursPosX;          /* Current position */
 148     INT           CursPosY;
 149     INT           ArcDirection;
 150     XFORM         xformWorld2Wnd;    /* World-to-window transformation */
 151     XFORM         xformWorld2Vport;  /* World-to-viewport transformation */
 152     XFORM         xformVport2World;  /* Inverse of the above transformation */
 153     BOOL          vport2WorldValid;  /* Is xformVport2World valid? */
 154 } DC;
 155
 156 /* Device functions for the Wine driver interface */
 157
 158 typedef INT (*DEVICEFONTENUMPROC)(LPENUMLOGFONTEX16,LPNEWTEXTMETRIC16,UINT16,LPARAM);
 159
 160 typedef struct tagDC_FUNCS
 161 {
 162     INT      (*pAbortDoc)(DC*);
 163     BOOL     (*pAbortPath)(DC*);
 164     BOOL     (*pAngleArc)(DC*,INT,INT,DWORD,FLOAT,FLOAT);
 165     BOOL     (*pArc)(DC*,INT,INT,INT,INT,INT,INT,INT,INT);
 166     BOOL     (*pArcTo)(DC*,INT,INT,INT,INT,INT,INT,INT,INT);
 167     BOOL     (*pBeginPath)(DC*);
 168     BOOL     (*pBitBlt)(DC*,INT,INT,INT,INT,DC*,INT,INT,DWORD);
 169     LONG     (*pBitmapBits)(HBITMAP,void*,LONG,WORD);
 170     INT      (*pChoosePixelFormat)(DC*,const PIXELFORMATDESCRIPTOR *);
 171     BOOL     (*pChord)(DC*,INT,INT,INT,INT,INT,INT,INT,INT);
 172     BOOL     (*pCloseFigure)(DC*);
 173     BOOL     (*pCreateBitmap)(HBITMAP);
 174     BOOL     (*pCreateDC)(DC*,LPCSTR,LPCSTR,LPCSTR,const DEVMODEA*);
 175     HBITMAP  (*pCreateDIBSection)(DC *,BITMAPINFO *,UINT,LPVOID *,HANDLE,
 176                                   DWORD,DWORD);
 177     HBITMAP16 (*pCreateDIBSection16)(DC *,BITMAPINFO *,UINT16,SEGPTR *,HANDLE,
 178                                      DWORD,DWORD);
 179     BOOL     (*pDeleteDC)(DC*);
 180     BOOL     (*pDeleteObject)(HGDIOBJ);
 181     INT      (*pDescribePixelFormat)(DC *,INT,UINT,PIXELFORMATDESCRIPTOR *);
 182     DWORD    (*pDeviceCapabilities)(LPSTR,LPCSTR,LPCSTR,WORD,LPSTR,LPDEVMODEA);
 183     BOOL     (*pEllipse)(DC*,INT,INT,INT,INT);
 184     INT      (*pEndDoc)(DC*);
 185     INT      (*pEndPage)(DC*);
 186     BOOL     (*pEndPath)(DC*);
 187     BOOL     (*pEnumDeviceFonts)(HDC,LPLOGFONT16,DEVICEFONTENUMPROC,LPARAM);
 188     INT      (*pEscape)(DC*,INT,INT,SEGPTR,SEGPTR);
 189     INT      (*pExcludeClipRect)(DC*,INT,INT,INT,INT);
 190     INT      (*pExtDeviceMode)(LPSTR,HWND,LPDEVMODEA,LPSTR,LPSTR,LPDEVMODEA,
 191                                LPSTR,DWORD);
 192     BOOL     (*pExtFloodFill)(DC*,INT,INT,COLORREF,UINT);
 193     BOOL     (*pExtTextOut)(DC*,INT,INT,UINT,const RECT*,LPCWSTR,UINT,
 194                             const INT*);
 195     BOOL     (*pFillPath)(DC*);
 196     BOOL     (*pFillRgn)(DC*,HRGN,HBRUSH);
 197     BOOL     (*pFlattenPath)(DC*);
 198     BOOL     (*pFrameRgn)(DC*,HRGN,HBRUSH,INT,INT);
 199     BOOL     (*pGetCharWidth)(DC*,UINT,UINT,LPINT);
 200     BOOL     (*pGetDCOrgEx)(DC*,LPPOINT);
 201     COLORREF (*pGetPixel)(DC*,INT,INT);
 202     INT      (*pGetPixelFormat)(DC*);
 203     BOOL     (*pGetTextExtentPoint)(DC*,LPCWSTR,INT,LPSIZE);
 204     BOOL     (*pGetTextMetrics)(DC*,TEXTMETRICA*);
 205     INT      (*pIntersectClipRect)(DC*,INT,INT,INT,INT);
 206     BOOL     (*pInvertRgn)(DC*,HRGN);
 207     BOOL     (*pLineTo)(DC*,INT,INT);
 208     BOOL     (*pMoveTo)(DC*,INT,INT);
 209     INT      (*pOffsetClipRgn)(DC*,INT,INT);
 210     BOOL     (*pOffsetViewportOrg)(DC*,INT,INT);
 211     BOOL     (*pOffsetWindowOrg)(DC*,INT,INT);
 212     BOOL     (*pPaintRgn)(DC*,HRGN);
 213     BOOL     (*pPatBlt)(DC*,INT,INT,INT,INT,DWORD);
 214     BOOL     (*pPie)(DC*,INT,INT,INT,INT,INT,INT,INT,INT);
 215     BOOL     (*pPolyBezier)(DC*,const POINT*,DWORD);
 216     BOOL     (*pPolyBezierTo)(DC*,const POINT*,DWORD);
 217     BOOL     (*pPolyDraw)(DC*,const POINT*,const BYTE *,DWORD);
 218     BOOL     (*pPolyPolygon)(DC*,const POINT*,const INT*,UINT);
 219     BOOL     (*pPolyPolyline)(DC*,const POINT*,const DWORD*,DWORD);
 220     BOOL     (*pPolygon)(DC*,const POINT*,INT);
 221     BOOL     (*pPolyline)(DC*,const POINT*,INT);
 222     BOOL     (*pPolylineTo)(DC*,const POINT*,INT);
 223     UINT     (*pRealizePalette)(DC*);
 224     BOOL     (*pRectangle)(DC*,INT,INT,INT,INT);
 225     BOOL     (*pRestoreDC)(DC*,INT);
 226     BOOL     (*pRoundRect)(DC*,INT,INT,INT,INT,INT,INT);
 227     INT      (*pSaveDC)(DC*);
 228     BOOL     (*pScaleViewportExt)(DC*,INT,INT,INT,INT);
 229     BOOL     (*pScaleWindowExt)(DC*,INT,INT,INT,INT);
 230     BOOL     (*pSelectClipPath)(DC*,INT);
 231     INT      (*pSelectClipRgn)(DC*,HRGN);
 232     HANDLE   (*pSelectObject)(DC*,HANDLE);
 233     HPALETTE (*pSelectPalette)(DC*,HPALETTE,BOOL);
 234     COLORREF (*pSetBkColor)(DC*,COLORREF);
 235     INT      (*pSetBkMode)(DC*,INT);
 236     VOID     (*pSetDeviceClipping)(DC*);
 237     INT      (*pSetDIBitsToDevice)(DC*,INT,INT,DWORD,DWORD,INT,INT,UINT,UINT,
 238                                    LPCVOID,const BITMAPINFO*,UINT);
 239     INT      (*pSetMapMode)(DC*,INT);
 240     DWORD    (*pSetMapperFlags)(DC*,DWORD);
 241     COLORREF (*pSetPixel)(DC*,INT,INT,COLORREF);
 242     BOOL     (*pSetPixelFormat)(DC*,INT,const PIXELFORMATDESCRIPTOR *);
 243     INT      (*pSetPolyFillMode)(DC*,INT);
 244     INT      (*pSetROP2)(DC*,INT);
 245     INT      (*pSetRelAbs)(DC*,INT);
 246     INT      (*pSetStretchBltMode)(DC*,INT);
 247     UINT     (*pSetTextAlign)(DC*,UINT);
 248     INT      (*pSetTextCharacterExtra)(DC*,INT);
 249     DWORD    (*pSetTextColor)(DC*,DWORD);
 250     INT      (*pSetTextJustification)(DC*,INT,INT);
 251     BOOL     (*pSetViewportExt)(DC*,INT,INT);
 252     BOOL     (*pSetViewportOrg)(DC*,INT,INT);
 253     BOOL     (*pSetWindowExt)(DC*,INT,INT);
 254     BOOL     (*pSetWindowOrg)(DC*,INT,INT);
 255     INT      (*pStartDoc)(DC*,const DOCINFOA*);
 256     INT      (*pStartPage)(DC*);
 257     BOOL     (*pStretchBlt)(DC*,INT,INT,INT,INT,DC*,INT,INT,INT,INT,DWORD);
 258     INT      (*pStretchDIBits)(DC*,INT,INT,INT,INT,INT,INT,INT,INT,
 259                                const void *,const BITMAPINFO *,UINT,DWORD);
 260     BOOL     (*pStrokeAndFillPath)(DC*);
 261     BOOL     (*pStrokePath)(DC*);
 262     BOOL     (*pSwapBuffers)(DC*);
 263     BOOL     (*pWidenPath)(DC*);
 264 } DC_FUNCTIONS;
 265
 266   /* LoadOEMResource types */
 267 #define OEM_BITMAP  1
 268 #define OEM_CURSOR  2
 269 #define OEM_ICON    3
 270
 271   /* DC hook codes */
 272 #define DCHC_INVALIDVISRGN      0x0001
 273 #define DCHC_DELETEDC           0x0002
 274
 275 #define DCHF_INVALIDATEVISRGN   0x0001
 276 #define DCHF_VALIDATEVISRGN     0x0002
 277
 278   /* DC flags */
 279 #define DC_MEMORY     0x0001   /* It is a memory DC */
 280 #define DC_SAVED      0x0002   /* It is a saved DC */
 281 #define DC_DIRTY      0x0004   /* hVisRgn has to be updated */
 282 #define DC_THUNKHOOK  0x0008   /* DC hook is in the 16-bit code */
 283
 284   /* Last 32 bytes are reserved for stock object handles */
 285 #define GDI_HEAP_SIZE               0xffe0
 286
 287   /* First handle possible for stock objects (must be >= GDI_HEAP_SIZE) */
 288 #define FIRST_STOCK_HANDLE          GDI_HEAP_SIZE
 289
 290   /* Stock objects handles */
 291
 292 #define NB_STOCK_OBJECTS          (DEFAULT_GUI_FONT + 1)
 293
 294 #define STOCK_WHITE_BRUSH       ((HBRUSH16)(FIRST_STOCK_HANDLE+WHITE_BRUSH))
 295 #define STOCK_LTGRAY_BRUSH      ((HBRUSH16)(FIRST_STOCK_HANDLE+LTGRAY_BRUSH))
 296 #define STOCK_GRAY_BRUSH        ((HBRUSH16)(FIRST_STOCK_HANDLE+GRAY_BRUSH))
 297 #define STOCK_DKGRAY_BRUSH      ((HBRUSH16)(FIRST_STOCK_HANDLE+DKGRAY_BRUSH))
 298 #define STOCK_BLACK_BRUSH       ((HBRUSH16)(FIRST_STOCK_HANDLE+BLACK_BRUSH))
 299 #define STOCK_NULL_BRUSH        ((HBRUSH16)(FIRST_STOCK_HANDLE+NULL_BRUSH))
 300 #define STOCK_HOLLOW_BRUSH      ((HBRUSH16)(FIRST_STOCK_HANDLE+HOLLOW_BRUSH))
 301 #define STOCK_WHITE_PEN         ((HPEN16)(FIRST_STOCK_HANDLE+WHITE_PEN))
 302 #define STOCK_BLACK_PEN         ((HPEN16)(FIRST_STOCK_HANDLE+BLACK_PEN))
 303 #define STOCK_NULL_PEN          ((HPEN16)(FIRST_STOCK_HANDLE+NULL_PEN))
 304 #define STOCK_OEM_FIXED_FONT    ((HFONT16)(FIRST_STOCK_HANDLE+OEM_FIXED_FONT))
 305 #define STOCK_ANSI_FIXED_FONT   ((HFONT16)(FIRST_STOCK_HANDLE+ANSI_FIXED_FONT))
 306 #define STOCK_ANSI_VAR_FONT     ((HFONT16)(FIRST_STOCK_HANDLE+ANSI_VAR_FONT))
 307 #define STOCK_SYSTEM_FONT       ((HFONT16)(FIRST_STOCK_HANDLE+SYSTEM_FONT))
 308 #define STOCK_DEVICE_DEFAULT_FONT ((HFONT16)(FIRST_STOCK_HANDLE+DEVICE_DEFAULT_FONT))
 309 #define STOCK_DEFAULT_PALETTE   ((HPALETTE16)(FIRST_STOCK_HANDLE+DEFAULT_PALETTE))
 310 #define STOCK_SYSTEM_FIXED_FONT ((HFONT16)(FIRST_STOCK_HANDLE+SYSTEM_FIXED_FONT))
 311 #define STOCK_DEFAULT_GUI_FONT  ((HFONT16)(FIRST_STOCK_HANDLE+DEFAULT_GUI_FONT))
 312
 313 #define FIRST_STOCK_FONT        STOCK_OEM_FIXED_FONT
 314 #define LAST_STOCK_FONT         STOCK_DEFAULT_GUI_FONT
 315
 316 #define LAST_STOCK_HANDLE       ((DWORD)STOCK_DEFAULT_GUI_FONT)
 317
 318 extern HBITMAP hPseudoStockBitmap;
 319
 320   /* Device <-> logical coords conversion */
 321
 322 /* A floating point version of the POINT structure */
 323 typedef struct tagFLOAT_POINT
 324 {
 325    FLOAT x, y;
 326 } FLOAT_POINT;
 327
 328 /* Rounds a floating point number to integer. The world-to-viewport
 329  * transformation process is done in floating point internally. This function
 330  * is then used to round these coordinates to integer values.
 331  */
 332 static inline INT WINE_UNUSED GDI_ROUND(FLOAT val)
 333 {
 334    return (int)floor(val + 0.5);
 335 }
 336
 337 /* Performs a viewport-to-world transformation on the specified point (which
 338  * is in floating point format). Returns TRUE if successful, else FALSE.
 339  */
 340 static inline BOOL WINE_UNUSED INTERNAL_DPTOLP_FLOAT(DC *dc, FLOAT_POINT *point)
 341 {
 342     FLOAT x, y;
 343
 344     /* Check that the viewport-to-world transformation is valid */
 345     if (!dc->vport2WorldValid)
 346         return FALSE;
 347
 348     /* Perform the transformation */
 349     x = point->x;
 350     y = point->y;
 351     point->x = x * dc->xformVport2World.eM11 +
 352                y * dc->xformVport2World.eM21 +
 353                dc->xformVport2World.eDx;
 354     point->y = x * dc->xformVport2World.eM12 +
 355                y * dc->xformVport2World.eM22 +
 356                dc->xformVport2World.eDy;
 357
 358     return TRUE;
 359 }
 360
 361 /* Performs a viewport-to-world transformation on the specified point (which
 362  * is in integer format). Returns TRUE if successful, else FALSE.
 363  */
 364 static inline BOOL WINE_UNUSED INTERNAL_DPTOLP(DC *dc, LPPOINT point)
 365 {
 366     FLOAT_POINT floatPoint;
 367
 368     /* Perform operation with floating point */
 369     floatPoint.x=(FLOAT)point->x;
 370     floatPoint.y=(FLOAT)point->y;
 371     if (!INTERNAL_DPTOLP_FLOAT(dc, &floatPoint))
 372         return FALSE;
 373
 374     /* Round to integers */
 375     point->x = GDI_ROUND(floatPoint.x);
 376     point->y = GDI_ROUND(floatPoint.y);
 377
 378     return TRUE;
 379 }
 380
 381 /* Performs a world-to-viewport transformation on the specified point (which
 382  * is in floating point format).
 383  */
 384 static inline void WINE_UNUSED INTERNAL_LPTODP_FLOAT(DC *dc, FLOAT_POINT *point)
 385 {
 386     FLOAT x, y;
 387
 388     /* Perform the transformation */
 389     x = point->x;
 390     y = point->y;
 391     point->x = x * dc->xformWorld2Vport.eM11 +
 392                y * dc->xformWorld2Vport.eM21 +
 393                dc->xformWorld2Vport.eDx;
 394     point->y = x * dc->xformWorld2Vport.eM12 +
 395                y * dc->xformWorld2Vport.eM22 +
 396                dc->xformWorld2Vport.eDy;
 397 }
 398
 399 /* Performs a world-to-viewport transformation on the specified point (which
 400  * is in integer format).
 401  */
 402 static inline void WINE_UNUSED INTERNAL_LPTODP(DC *dc, LPPOINT point)
 403 {
 404     FLOAT_POINT floatPoint;
 405
 406     /* Perform operation with floating point */
 407     floatPoint.x=(FLOAT)point->x;
 408     floatPoint.y=(FLOAT)point->y;
 409     INTERNAL_LPTODP_FLOAT(dc, &floatPoint);
 410
 411     /* Round to integers */
 412     point->x = GDI_ROUND(floatPoint.x);
 413     point->y = GDI_ROUND(floatPoint.y);
 414 }
 415
 416 #define XDPTOLP(dc,x) \
 417     (MulDiv(((x)-(dc)->vportOrgX), (dc)->wndExtX, (dc)->vportExtX) + (dc)->wndOrgX)
 418 #define YDPTOLP(dc,y) \
 419     (MulDiv(((y)-(dc)->vportOrgY), (dc)->wndExtY, (dc)->vportExtY) + (dc)->wndOrgY)
 420 #define XLPTODP(dc,x) \
 421     (MulDiv(((x)-(dc)->wndOrgX), (dc)->vportExtX, (dc)->wndExtX) + (dc)->vportOrgX)
 422 #define YLPTODP(dc,y) \
 423     (MulDiv(((y)-(dc)->wndOrgY), (dc)->vportExtY, (dc)->wndExtY) + (dc)->vportOrgY)
 424
 425   /* Device <-> logical size conversion */
 426
 427 #define XDSTOLS(dc,x) \
 428     MulDiv((x), (dc)->wndExtX, (dc)->vportExtX)
 429 #define YDSTOLS(dc,y) \
 430     MulDiv((y), (dc)->wndExtY, (dc)->vportExtY)
 431 #define XLSTODS(dc,x) \
 432     MulDiv((x), (dc)->vportExtX, (dc)->wndExtX)
 433 #define YLSTODS(dc,y) \
 434     MulDiv((y), (dc)->vportExtY, (dc)->wndExtY)
 435
 436   /* GDI local heap */
 437
 438 extern BOOL GDI_Init(void);
 439 extern void *GDI_AllocObject( WORD, WORD, HGDIOBJ * );
 440 extern void *GDI_ReallocObject( WORD, HGDIOBJ, void *obj );
 441 extern BOOL GDI_FreeObject( HGDIOBJ, void *obj );
 442 extern void *GDI_GetObjPtr( HGDIOBJ, WORD );
 443 extern void GDI_ReleaseObj( HGDIOBJ );
 444
 445 extern BOOL DRIVER_RegisterDriver( LPCSTR name, const DC_FUNCTIONS *funcs );
 446 extern const DC_FUNCTIONS *DRIVER_FindDriver( LPCSTR name );
 447 extern BOOL DRIVER_UnregisterDriver( LPCSTR name );
 448 extern BOOL DRIVER_GetDriverName( LPCSTR device, LPSTR driver, DWORD size );
 449
 450 extern POINT *GDI_Bezier( const POINT *Points, INT count, INT *nPtsOut );
 451
 452 extern DC * DC_AllocDC( const DC_FUNCTIONS *funcs );
 453 extern DC * DC_GetDCPtr( HDC hdc );
 454 extern DC * DC_GetDCUpdate( HDC hdc );
 455 extern void DC_InitDC( DC * dc );
 456 extern void DC_UpdateXforms( DC * dc );
 457
 458
 459 #define CLIP_INTERSECT 0x0001
 460 #define CLIP_EXCLUDE   0x0002
 461 #define CLIP_KEEPRGN   0x0004
 462
 463 /* objects/clipping.c */
 464 INT CLIPPING_IntersectClipRect( DC * dc, INT left, INT top,
 465                                 INT right, INT bottom, UINT flags );
 466 INT CLIPPING_IntersectVisRect( DC * dc, INT left, INT top,
 467                                INT right, INT bottom, BOOL exclude );
 468 extern void CLIPPING_UpdateGCRegion( DC * dc );
 469
 470 #endif  /* __WINE_GDI_H */