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 "ldt.h"
  16 #include "local.h"
  17 #include "path.h"
  18 #include <math.h>
  19
  20   /* GDI objects magic numbers */
  21 #define FIRST_MAGIC           0x4f47
  22 #define PEN_MAGIC             0x4f47
  23 #define BRUSH_MAGIC           0x4f48
  24 #define FONT_MAGIC            0x4f49
  25 #define PALETTE_MAGIC         0x4f4a
  26 #define BITMAP_MAGIC          0x4f4b
  27 #define REGION_MAGIC          0x4f4c
  28 #define DC_MAGIC              0x4f4d
  29 #define DISABLED_DC_MAGIC     0x4f4e
  30 #define META_DC_MAGIC         0x4f4f
  31 #define METAFILE_MAGIC        0x4f50
  32 #define METAFILE_DC_MAGIC     0x4f51
  33 #define ENHMETAFILE_MAGIC     0x4f52
  34 #define ENHMETAFILE_DC_MAGIC  0x4f53
  35 #define LAST_MAGIC            0x4f53
  36
  37 #define MAGIC_DONTCARE        0xffff
  38
  39 /* GDI constants for making objects private/system (naming undoc. !) */
  40 #define OBJECT_PRIVATE        0x2000
  41 #define OBJECT_NOSYSTEM       0x8000
  42
  43 #define GDIMAGIC(magic) ((magic) & ~(OBJECT_PRIVATE|OBJECT_NOSYSTEM))
  44
  45 typedef struct tagGDIOBJHDR
  46 {
  47     HANDLE16    hNext;
  48     WORD        wMagic;
  49     DWORD       dwCount;
  50 } GDIOBJHDR;
  51
  52
  53 typedef struct tagDeviceCaps
  54 {
  55     WORD   version;       /*   0: driver version */
  56     WORD   technology;    /*   2: device technology */
  57     WORD   horzSize;      /*   4: width of display in mm */
  58     WORD   vertSize;      /*   6: height of display in mm */
  59     WORD   horzRes;       /*   8: width of display in pixels */
  60     WORD   vertRes;       /*  10: width of display in pixels */
  61     WORD   bitsPixel;     /*  12: bits per pixel */
  62     WORD   planes;        /*  14: color planes */
  63     WORD   numBrushes;    /*  16: device-specific brushes */
  64     WORD   numPens;       /*  18: device-specific pens */
  65     WORD   numMarkers;    /*  20: device-specific markers */
  66     WORD   numFonts;      /*  22: device-specific fonts */
  67     WORD   numColors;     /*  24: size of color table */
  68     WORD   pdeviceSize;   /*  26: size of PDEVICE structure */
  69     WORD   curveCaps;     /*  28: curve capabilities */
  70     WORD   lineCaps;      /*  30: line capabilities */
  71     WORD   polygonalCaps; /*  32: polygon capabilities */
  72     WORD   textCaps;      /*  34: text capabilities */
  73     WORD   clipCaps;      /*  36: clipping capabilities */
  74     WORD   rasterCaps;    /*  38: raster capabilities */
  75     WORD   aspectX;       /*  40: relative width of device pixel */
  76     WORD   aspectY;       /*  42: relative height of device pixel */
  77     WORD   aspectXY;      /*  44: relative diagonal width of device pixel */
  78     WORD   pad1[21];      /*  46-86: reserved */
  79     WORD   logPixelsX;    /*  88: pixels / logical X inch */
  80     WORD   logPixelsY;    /*  90: pixels / logical Y inch */
  81     WORD   pad2[6];       /*  92-102: reserved */
  82     WORD   sizePalette;   /* 104: entries in system palette */
  83     WORD   numReserved;   /* 106: reserved entries */
  84     WORD   colorRes;      /* 108: color resolution */
  85 } DeviceCaps;
  86
  87 typedef BOOL16 CALLBACK (*DCHOOKPROC)(HDC16,WORD,DWORD,LPARAM);
  88
  89 typedef struct tagDC
  90 {
  91     GDIOBJHDR    header;
  92     HDC          hSelf;            /* Handle to this DC */
  93     const struct tagDC_FUNCS *funcs; /* DC function table */
  94     void         *physDev;         /* Physical device (driver-specific) */
  95     INT          saveLevel;
  96     DWORD        dwHookData;
  97     FARPROC16    hookProc;         /* the original SEGPTR ... */
  98     DCHOOKPROC   hookThunk;        /* ... and the thunk to call it */
  99
 100     INT          wndOrgX;          /* Window origin */
 101     INT          wndOrgY;
 102     INT          wndExtX;          /* Window extent */
 103     INT          wndExtY;
 104     INT          vportOrgX;        /* Viewport origin */
 105     INT          vportOrgY;
 106     INT          vportExtX;        /* Viewport extent */
 107     INT          vportExtY;
 108
 109     int           flags;
 110     const DeviceCaps *devCaps;
 111
 112     HRGN16        hClipRgn;     /* Clip region (may be 0) */
 113     HRGN16        hVisRgn;      /* Visible region (must never be 0) */
 114     HRGN16        hGCClipRgn;   /* GC clip region (ClipRgn AND VisRgn) */
 115     HPEN16        hPen;
 116     HBRUSH16      hBrush;
 117     HFONT16       hFont;
 118     HBITMAP16     hBitmap;
 119     HANDLE16      hDevice;
 120     HPALETTE16    hPalette;
 121
 122     GdiPath       path;
 123
 124     WORD          ROPmode;
 125     WORD          polyFillMode;
 126     WORD          stretchBltMode;
 127     WORD          relAbsMode;
 128     WORD          backgroundMode;
 129     COLORREF      backgroundColor;
 130     COLORREF      textColor;
 131     short         brushOrgX;
 132     short         brushOrgY;
 133
 134     WORD          textAlign;         /* Text alignment from SetTextAlign() */
 135     short         charExtra;         /* Spacing from SetTextCharacterExtra() */
 136     short         breakTotalExtra;   /* Total extra space for justification */
 137     short         breakCount;        /* Break char. count */
 138     short         breakExtra;        /* breakTotalExtra / breakCount */
 139     short         breakRem;          /* breakTotalExtra % breakCount */
 140
 141     RECT          totalExtent;
 142     BYTE          bitsPerPixel;
 143
 144     INT           MapMode;
 145     INT           GraphicsMode;      /* Graphics mode */
 146     INT           DCOrgX;            /* DC origin */
 147     INT           DCOrgY;
 148     ABORTPROC     pAbortProc;        /* AbortProc for Printing */
 149     INT           CursPosX;          /* Current position */
 150     INT           CursPosY;
 151     INT           ArcDirection;
 152     XFORM         xformWorld2Wnd;    /* World-to-window transformation */
 153     XFORM         xformWorld2Vport;  /* World-to-viewport transformation */
 154     XFORM         xformVport2World;  /* Inverse of the above transformation */
 155     BOOL          vport2WorldValid;  /* Is xformVport2World valid? */
 156 } DC;
 157
 158 /* Device functions for the Wine driver interface */
 159
 160 typedef INT (*DEVICEFONTENUMPROC)(LPENUMLOGFONTEX16,LPNEWTEXTMETRIC16,UINT16,LPARAM);
 161
 162 typedef struct tagDC_FUNCS
 163 {
 164     INT      (*pAbortDoc)(DC*);
 165     BOOL     (*pAbortPath)(DC*);
 166     BOOL     (*pAngleArc)(DC*,INT,INT,DWORD,FLOAT,FLOAT);
 167     BOOL     (*pArc)(DC*,INT,INT,INT,INT,INT,INT,INT,INT);
 168     BOOL     (*pArcTo)(DC*,INT,INT,INT,INT,INT,INT,INT,INT);
 169     BOOL     (*pBeginPath)(DC*);
 170     BOOL     (*pBitBlt)(DC*,INT,INT,INT,INT,DC*,INT,INT,DWORD);
 171     LONG     (*pBitmapBits)(HBITMAP,void*,LONG,WORD);
 172     INT      (*pChoosePixelFormat)(DC*,const PIXELFORMATDESCRIPTOR *);
 173     BOOL     (*pChord)(DC*,INT,INT,INT,INT,INT,INT,INT,INT);
 174     BOOL     (*pCloseFigure)(DC*);
 175     BOOL     (*pCreateBitmap)(HBITMAP);
 176     BOOL     (*pCreateDC)(DC*,LPCSTR,LPCSTR,LPCSTR,const DEVMODEA*);
 177     HBITMAP  (*pCreateDIBSection)(DC *,BITMAPINFO *,UINT,LPVOID *,HANDLE,
 178                                   DWORD,DWORD);
 179     HBITMAP16 (*pCreateDIBSection16)(DC *,BITMAPINFO *,UINT16,SEGPTR *,HANDLE,
 180                                      DWORD,DWORD);
 181     BOOL     (*pDeleteDC)(DC*);
 182     BOOL     (*pDeleteObject)(HGDIOBJ);
 183     INT      (*pDescribePixelFormat)(DC *,INT,UINT,PIXELFORMATDESCRIPTOR *);
 184     DWORD    (*pDeviceCapabilities)(LPSTR,LPCSTR,LPCSTR,WORD,LPSTR,LPDEVMODEA);
 185     BOOL     (*pEllipse)(DC*,INT,INT,INT,INT);
 186     INT      (*pEndDoc)(DC*);
 187     INT      (*pEndPage)(DC*);
 188     BOOL     (*pEndPath)(DC*);
 189     BOOL     (*pEnumDeviceFonts)(HDC,LPLOGFONT16,DEVICEFONTENUMPROC,LPARAM);
 190     INT      (*pEscape)(DC*,INT,INT,SEGPTR,SEGPTR);
 191     INT      (*pExcludeClipRect)(DC*,INT,INT,INT,INT);
 192     INT      (*pExtDeviceMode)(LPSTR,HWND,LPDEVMODEA,LPSTR,LPSTR,LPDEVMODEA,
 193                                LPSTR,DWORD);
 194     BOOL     (*pExtFloodFill)(DC*,INT,INT,COLORREF,UINT);
 195     BOOL     (*pExtTextOut)(DC*,INT,INT,UINT,const RECT*,LPCWSTR,UINT,
 196                             const INT*);
 197     BOOL     (*pFillPath)(DC*);
 198     BOOL     (*pFillRgn)(DC*,HRGN,HBRUSH);
 199     BOOL     (*pFlattenPath)(DC*);
 200     BOOL     (*pFrameRgn)(DC*,HRGN,HBRUSH,INT,INT);
 201     BOOL     (*pGetCharWidth)(DC*,UINT,UINT,LPINT);
 202     BOOL     (*pGetDCOrgEx)(DC*,LPPOINT);
 203     COLORREF (*pGetPixel)(DC*,INT,INT);
 204     INT      (*pGetPixelFormat)(DC*);
 205     BOOL     (*pGetTextExtentPoint)(DC*,LPCWSTR,INT,LPSIZE);
 206     BOOL     (*pGetTextMetrics)(DC*,TEXTMETRICA*);
 207     INT      (*pIntersectClipRect)(DC*,INT,INT,INT,INT);
 208     BOOL     (*pInvertRgn)(DC*,HRGN);
 209     BOOL     (*pLineTo)(DC*,INT,INT);
 210     BOOL     (*pMoveTo)(DC*,INT,INT);
 211     INT      (*pOffsetClipRgn)(DC*,INT,INT);
 212     BOOL     (*pOffsetViewportOrg)(DC*,INT,INT);
 213     BOOL     (*pOffsetWindowOrg)(DC*,INT,INT);
 214     BOOL     (*pPaintRgn)(DC*,HRGN);
 215     BOOL     (*pPatBlt)(DC*,INT,INT,INT,INT,DWORD);
 216     BOOL     (*pPie)(DC*,INT,INT,INT,INT,INT,INT,INT,INT);
 217     BOOL     (*pPolyBezier)(DC*,const POINT*,DWORD);
 218     BOOL     (*pPolyBezierTo)(DC*,const POINT*,DWORD);
 219     BOOL     (*pPolyDraw)(DC*,const POINT*,const BYTE *,DWORD);
 220     BOOL     (*pPolyPolygon)(DC*,const POINT*,const INT*,UINT);
 221     BOOL     (*pPolyPolyline)(DC*,const POINT*,const DWORD*,DWORD);
 222     BOOL     (*pPolygon)(DC*,const POINT*,INT);
 223     BOOL     (*pPolyline)(DC*,const POINT*,INT);
 224     BOOL     (*pPolylineTo)(DC*,const POINT*,INT);
 225     UINT     (*pRealizePalette)(DC*);
 226     BOOL     (*pRectangle)(DC*,INT,INT,INT,INT);
 227     BOOL     (*pRestoreDC)(DC*,INT);
 228     BOOL     (*pRoundRect)(DC*,INT,INT,INT,INT,INT,INT);
 229     INT      (*pSaveDC)(DC*);
 230     BOOL     (*pScaleViewportExt)(DC*,INT,INT,INT,INT);
 231     BOOL     (*pScaleWindowExt)(DC*,INT,INT,INT,INT);
 232     BOOL     (*pSelectClipPath)(DC*,INT);
 233     INT      (*pSelectClipRgn)(DC*,HRGN);
 234     HANDLE   (*pSelectObject)(DC*,HANDLE);
 235     HPALETTE (*pSelectPalette)(DC*,HPALETTE,BOOL);
 236     COLORREF (*pSetBkColor)(DC*,COLORREF);
 237     INT      (*pSetBkMode)(DC*,INT);
 238     VOID     (*pSetDeviceClipping)(DC*);
 239     INT      (*pSetDIBitsToDevice)(DC*,INT,INT,DWORD,DWORD,INT,INT,UINT,UINT,
 240                                    LPCVOID,const BITMAPINFO*,UINT);
 241     INT      (*pSetMapMode)(DC*,INT);
 242     DWORD    (*pSetMapperFlags)(DC*,DWORD);
 243     COLORREF (*pSetPixel)(DC*,INT,INT,COLORREF);
 244     BOOL     (*pSetPixelFormat)(DC*,INT,const PIXELFORMATDESCRIPTOR *);
 245     INT      (*pSetPolyFillMode)(DC*,INT);
 246     INT      (*pSetROP2)(DC*,INT);
 247     INT      (*pSetRelAbs)(DC*,INT);
 248     INT      (*pSetStretchBltMode)(DC*,INT);
 249     UINT     (*pSetTextAlign)(DC*,UINT);
 250     INT      (*pSetTextCharacterExtra)(DC*,INT);
 251     DWORD    (*pSetTextColor)(DC*,DWORD);
 252     INT      (*pSetTextJustification)(DC*,INT,INT);
 253     BOOL     (*pSetViewportExt)(DC*,INT,INT);
 254     BOOL     (*pSetViewportOrg)(DC*,INT,INT);
 255     BOOL     (*pSetWindowExt)(DC*,INT,INT);
 256     BOOL     (*pSetWindowOrg)(DC*,INT,INT);
 257     INT      (*pStartDoc)(DC*,const DOCINFOA*);
 258     INT      (*pStartPage)(DC*);
 259     BOOL     (*pStretchBlt)(DC*,INT,INT,INT,INT,DC*,INT,INT,INT,INT,DWORD);
 260     INT      (*pStretchDIBits)(DC*,INT,INT,INT,INT,INT,INT,INT,INT,
 261                                const void *,const BITMAPINFO *,UINT,DWORD);
 262     BOOL     (*pStrokeAndFillPath)(DC*);
 263     BOOL     (*pStrokePath)(DC*);
 264     BOOL     (*pSwapBuffers)(DC*);
 265     BOOL     (*pWidenPath)(DC*);
 266 } DC_FUNCTIONS;
 267
 268   /* LoadOEMResource types */
 269 #define OEM_BITMAP  1
 270 #define OEM_CURSOR  2
 271 #define OEM_ICON    3
 272
 273   /* DC hook codes */
 274 #define DCHC_INVALIDVISRGN      0x0001
 275 #define DCHC_DELETEDC           0x0002
 276
 277 #define DCHF_INVALIDATEVISRGN   0x0001
 278 #define DCHF_VALIDATEVISRGN     0x0002
 279
 280   /* DC flags */
 281 #define DC_MEMORY     0x0001   /* It is a memory DC */
 282 #define DC_SAVED      0x0002   /* It is a saved DC */
 283 #define DC_DIRTY      0x0004   /* hVisRgn has to be updated */
 284 #define DC_THUNKHOOK  0x0008   /* DC hook is in the 16-bit code */
 285
 286   /* Last 32 bytes are reserved for stock object handles */
 287 #define GDI_HEAP_SIZE               0xffe0
 288
 289   /* First handle possible for stock objects (must be >= GDI_HEAP_SIZE) */
 290 #define FIRST_STOCK_HANDLE          GDI_HEAP_SIZE
 291
 292   /* Stock objects handles */
 293
 294 #define NB_STOCK_OBJECTS          (DEFAULT_GUI_FONT + 1)
 295
 296 #define STOCK_WHITE_BRUSH       ((HBRUSH16)(FIRST_STOCK_HANDLE+WHITE_BRUSH))
 297 #define STOCK_LTGRAY_BRUSH      ((HBRUSH16)(FIRST_STOCK_HANDLE+LTGRAY_BRUSH))
 298 #define STOCK_GRAY_BRUSH        ((HBRUSH16)(FIRST_STOCK_HANDLE+GRAY_BRUSH))
 299 #define STOCK_DKGRAY_BRUSH      ((HBRUSH16)(FIRST_STOCK_HANDLE+DKGRAY_BRUSH))
 300 #define STOCK_BLACK_BRUSH       ((HBRUSH16)(FIRST_STOCK_HANDLE+BLACK_BRUSH))
 301 #define STOCK_NULL_BRUSH        ((HBRUSH16)(FIRST_STOCK_HANDLE+NULL_BRUSH))
 302 #define STOCK_HOLLOW_BRUSH      ((HBRUSH16)(FIRST_STOCK_HANDLE+HOLLOW_BRUSH))
 303 #define STOCK_WHITE_PEN         ((HPEN16)(FIRST_STOCK_HANDLE+WHITE_PEN))
 304 #define STOCK_BLACK_PEN         ((HPEN16)(FIRST_STOCK_HANDLE+BLACK_PEN))
 305 #define STOCK_NULL_PEN          ((HPEN16)(FIRST_STOCK_HANDLE+NULL_PEN))
 306 #define STOCK_OEM_FIXED_FONT    ((HFONT16)(FIRST_STOCK_HANDLE+OEM_FIXED_FONT))
 307 #define STOCK_ANSI_FIXED_FONT   ((HFONT16)(FIRST_STOCK_HANDLE+ANSI_FIXED_FONT))
 308 #define STOCK_ANSI_VAR_FONT     ((HFONT16)(FIRST_STOCK_HANDLE+ANSI_VAR_FONT))
 309 #define STOCK_SYSTEM_FONT       ((HFONT16)(FIRST_STOCK_HANDLE+SYSTEM_FONT))
 310 #define STOCK_DEVICE_DEFAULT_FONT ((HFONT16)(FIRST_STOCK_HANDLE+DEVICE_DEFAULT_FONT))
 311 #define STOCK_DEFAULT_PALETTE   ((HPALETTE16)(FIRST_STOCK_HANDLE+DEFAULT_PALETTE))
 312 #define STOCK_SYSTEM_FIXED_FONT ((HFONT16)(FIRST_STOCK_HANDLE+SYSTEM_FIXED_FONT))
 313 #define STOCK_DEFAULT_GUI_FONT  ((HFONT16)(FIRST_STOCK_HANDLE+DEFAULT_GUI_FONT))
 314
 315 #define FIRST_STOCK_FONT        STOCK_OEM_FIXED_FONT
 316 #define LAST_STOCK_FONT         STOCK_DEFAULT_GUI_FONT
 317
 318 #define LAST_STOCK_HANDLE       ((DWORD)STOCK_DEFAULT_GUI_FONT)
 319
 320 extern HBITMAP hPseudoStockBitmap;
 321
 322   /* Device <-> logical coords conversion */
 323
 324 /* A floating point version of the POINT structure */
 325 typedef struct tagFLOAT_POINT
 326 {
 327    FLOAT x, y;
 328 } FLOAT_POINT;
 329
 330 /* Rounds a floating point number to integer. The world-to-viewport
 331  * transformation process is done in floating point internally. This function
 332  * is then used to round these coordinates to integer values.
 333  */
 334 static inline INT WINE_UNUSED GDI_ROUND(FLOAT val)
 335 {
 336    return (int)floor(val + 0.5);
 337 }
 338
 339 /* Performs a viewport-to-world transformation on the specified point (which
 340  * is in floating point format). Returns TRUE if successful, else FALSE.
 341  */
 342 static inline BOOL WINE_UNUSED INTERNAL_DPTOLP_FLOAT(DC *dc, FLOAT_POINT *point)
 343 {
 344     FLOAT x, y;
 345
 346     /* Check that the viewport-to-world transformation is valid */
 347     if (!dc->vport2WorldValid)
 348         return FALSE;
 349
 350     /* Perform the transformation */
 351     x = point->x;
 352     y = point->y;
 353     point->x = x * dc->xformVport2World.eM11 +
 354                y * dc->xformVport2World.eM21 +
 355                dc->xformVport2World.eDx;
 356     point->y = x * dc->xformVport2World.eM12 +
 357                y * dc->xformVport2World.eM22 +
 358                dc->xformVport2World.eDy;
 359
 360     return TRUE;
 361 }
 362
 363 /* Performs a viewport-to-world transformation on the specified point (which
 364  * is in integer format). Returns TRUE if successful, else FALSE.
 365  */
 366 static inline BOOL WINE_UNUSED INTERNAL_DPTOLP(DC *dc, LPPOINT point)
 367 {
 368     FLOAT_POINT floatPoint;
 369
 370     /* Perform operation with floating point */
 371     floatPoint.x=(FLOAT)point->x;
 372     floatPoint.y=(FLOAT)point->y;
 373     if (!INTERNAL_DPTOLP_FLOAT(dc, &floatPoint))
 374         return FALSE;
 375
 376     /* Round to integers */
 377     point->x = GDI_ROUND(floatPoint.x);
 378     point->y = GDI_ROUND(floatPoint.y);
 379
 380     return TRUE;
 381 }
 382
 383 /* Performs a world-to-viewport transformation on the specified point (which
 384  * is in floating point format).
 385  */
 386 static inline void WINE_UNUSED INTERNAL_LPTODP_FLOAT(DC *dc, FLOAT_POINT *point)
 387 {
 388     FLOAT x, y;
 389
 390     /* Perform the transformation */
 391     x = point->x;
 392     y = point->y;
 393     point->x = x * dc->xformWorld2Vport.eM11 +
 394                y * dc->xformWorld2Vport.eM21 +
 395                dc->xformWorld2Vport.eDx;
 396     point->y = x * dc->xformWorld2Vport.eM12 +
 397                y * dc->xformWorld2Vport.eM22 +
 398                dc->xformWorld2Vport.eDy;
 399 }
 400
 401 /* Performs a world-to-viewport transformation on the specified point (which
 402  * is in integer format).
 403  */
 404 static inline void WINE_UNUSED INTERNAL_LPTODP(DC *dc, LPPOINT point)
 405 {
 406     FLOAT_POINT floatPoint;
 407
 408     /* Perform operation with floating point */
 409     floatPoint.x=(FLOAT)point->x;
 410     floatPoint.y=(FLOAT)point->y;
 411     INTERNAL_LPTODP_FLOAT(dc, &floatPoint);
 412
 413     /* Round to integers */
 414     point->x = GDI_ROUND(floatPoint.x);
 415     point->y = GDI_ROUND(floatPoint.y);
 416 }
 417
 418 #define XDPTOLP(dc,x) \
 419     (MulDiv(((x)-(dc)->vportOrgX), (dc)->wndExtX, (dc)->vportExtX) + (dc)->wndOrgX)
 420 #define YDPTOLP(dc,y) \
 421     (MulDiv(((y)-(dc)->vportOrgY), (dc)->wndExtY, (dc)->vportExtY) + (dc)->wndOrgY)
 422 #define XLPTODP(dc,x) \
 423     (MulDiv(((x)-(dc)->wndOrgX), (dc)->vportExtX, (dc)->wndExtX) + (dc)->vportOrgX)
 424 #define YLPTODP(dc,y) \
 425     (MulDiv(((y)-(dc)->wndOrgY), (dc)->vportExtY, (dc)->wndExtY) + (dc)->vportOrgY)
 426
 427   /* Device <-> logical size conversion */
 428
 429 #define XDSTOLS(dc,x) \
 430     MulDiv((x), (dc)->wndExtX, (dc)->vportExtX)
 431 #define YDSTOLS(dc,y) \
 432     MulDiv((y), (dc)->wndExtY, (dc)->vportExtY)
 433 #define XLSTODS(dc,x) \
 434     MulDiv((x), (dc)->vportExtX, (dc)->wndExtX)
 435 #define YLSTODS(dc,y) \
 436     MulDiv((y), (dc)->vportExtY, (dc)->wndExtY)
 437
 438   /* GDI local heap */
 439
 440 extern BOOL GDI_Init(void);
 441 extern void *GDI_AllocObject( WORD, WORD, HGDIOBJ * );
 442 extern void *GDI_ReallocObject( WORD, HGDIOBJ, void *obj );
 443 extern BOOL GDI_FreeObject( HGDIOBJ, void *obj );
 444 extern void *GDI_GetObjPtr( HGDIOBJ, WORD );
 445 extern void GDI_ReleaseObj( HGDIOBJ );
 446
 447 extern BOOL DRIVER_RegisterDriver( LPCSTR name, const DC_FUNCTIONS *funcs );
 448 extern const DC_FUNCTIONS *DRIVER_FindDriver( LPCSTR name );
 449 extern BOOL DRIVER_UnregisterDriver( LPCSTR name );
 450 extern BOOL DRIVER_GetDriverName( LPCSTR device, LPSTR driver, DWORD size );
 451
 452 extern POINT *GDI_Bezier( const POINT *Points, INT count, INT *nPtsOut );
 453
 454 extern DC * DC_AllocDC( const DC_FUNCTIONS *funcs );
 455 extern DC * DC_GetDCPtr( HDC hdc );
 456 extern DC * DC_GetDCUpdate( HDC hdc );
 457 extern void DC_InitDC( DC * dc );
 458 extern void DC_UpdateXforms( DC * dc );
 459
 460
 461 #define CLIP_INTERSECT 0x0001
 462 #define CLIP_EXCLUDE   0x0002
 463 #define CLIP_KEEPRGN   0x0004
 464
 465 /* objects/clipping.c */
 466 INT CLIPPING_IntersectClipRect( DC * dc, INT left, INT top,
 467                                 INT right, INT bottom, UINT flags );
 468 INT CLIPPING_IntersectVisRect( DC * dc, INT left, INT top,
 469                                INT right, INT bottom, BOOL exclude );
 470 extern void CLIPPING_UpdateGCRegion( DC * dc );
 471
 472 #endif  /* __WINE_GDI_H */