dlls/gdi32/gdi_private.h

   1 /*
   2  * GDI definitions
   3  *
   4  * Copyright 1993 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #ifndef __WINE_GDI_PRIVATE_H
  22 #define __WINE_GDI_PRIVATE_H
  23
  24 #include <math.h>
  25 #include <stdlib.h>
  26 #include <stdarg.h>
  27 #include "windef.h"
  28 #include "winbase.h"
  29 #include "wingdi.h"
  30 #include "wine/gdi_driver.h"
  31
  32 /* Metafile defines */
  33 #define META_EOF 0x0000
  34 /* values of mtType in METAHEADER.  Note however that the disk image of a disk
  35    based metafile has mtType == 1 */
  36 #define METAFILE_MEMORY 1
  37 #define METAFILE_DISK   2
  38 #define MFHEADERSIZE (sizeof(METAHEADER))
  39 #define MFVERSION 0x300
  40
  41 typedef struct {
  42     EMR   emr;
  43     INT   nBreakExtra;
  44     INT   nBreakCount;
  45 } EMRSETTEXTJUSTIFICATION, *PEMRSETTEXTJUSTIFICATION;
  46
  47 /* extra stock object: default 1x1 bitmap for memory DCs */
  48 #define DEFAULT_BITMAP (STOCK_LAST+1)
  49
  50 struct gdi_obj_funcs
  51 {
  52     HGDIOBJ (*pSelectObject)( HGDIOBJ handle, HDC hdc );
  53     INT     (*pGetObjectA)( HGDIOBJ handle, INT count, LPVOID buffer );
  54     INT     (*pGetObjectW)( HGDIOBJ handle, INT count, LPVOID buffer );
  55     BOOL    (*pUnrealizeObject)( HGDIOBJ handle );
  56     BOOL    (*pDeleteObject)( HGDIOBJ handle );
  57 };
  58
  59 struct hdc_list
  60 {
  61     HDC hdc;
  62     struct hdc_list *next;
  63 };
  64
  65 typedef struct tagGDIOBJHDR
  66 {
  67     WORD        type;         /* object type (one of the OBJ_* constants) */
  68     WORD        system : 1;   /* system object flag */
  69     WORD        deleted : 1;  /* whether DeleteObject has been called on this object */
  70     DWORD       selcount;     /* number of times the object is selected in a DC */
  71     const struct gdi_obj_funcs *funcs;
  72     struct hdc_list *hdcs;
  73 } GDIOBJHDR;
  74
  75 /* It should not be necessary to access the contents of the GdiPath
  76  * structure directly; if you find that the exported functions don't
  77  * allow you to do what you want, then please place a new exported
  78  * function that does this job in path.c.
  79  */
  80 typedef enum tagGdiPathState
  81 {
  82    PATH_Null,
  83    PATH_Open,
  84    PATH_Closed
  85 } GdiPathState;
  86
  87 typedef struct tagGdiPath
  88 {
  89    GdiPathState state;
  90    POINT      *pPoints;
  91    BYTE         *pFlags;
  92    int          numEntriesUsed, numEntriesAllocated;
  93    BOOL       newStroke;
  94 } GdiPath;
  95
  96 typedef struct tagGdiFont GdiFont;
  97
  98 typedef struct tagDC
  99 {
 100     GDIOBJHDR    header;
 101     HDC          hSelf;            /* Handle to this DC */
 102     struct gdi_physdev nulldrv;    /* physdev for the null driver */
 103     PHYSDEV      dibdrv;           /* physdev for the dib driver */
 104     PHYSDEV      physDev;          /* current top of the physdev stack */
 105     DWORD        thread;           /* thread owning the DC */
 106     LONG         refcount;         /* thread refcount */
 107     LONG         dirty;            /* dirty flag */
 108     INT          saveLevel;
 109     struct tagDC *saved_dc;
 110     DWORD_PTR    dwHookData;
 111     DCHOOKPROC   hookProc;         /* DC hook */
 112
 113     INT          wndOrgX;          /* Window origin */
 114     INT          wndOrgY;
 115     INT          wndExtX;          /* Window extent */
 116     INT          wndExtY;
 117     INT          vportOrgX;        /* Viewport origin */
 118     INT          vportOrgY;
 119     INT          vportExtX;        /* Viewport extent */
 120     INT          vportExtY;
 121     SIZE         virtual_res;      /* Initially HORZRES,VERTRES. Changed by SetVirtualResolution */
 122     SIZE         virtual_size;     /* Initially HORZSIZE,VERTSIZE. Changed by SetVirtualResolution */
 123     RECT         vis_rect;         /* visible rectangle in screen coords */
 124     FLOAT        miterLimit;
 125
 126     int           flags;
 127     DWORD         layout;
 128     HRGN          hClipRgn;      /* Clip region (may be 0) */
 129     HRGN          hMetaRgn;      /* Meta region (may be 0) */
 130     HRGN          hMetaClipRgn;  /* Intersection of meta and clip regions (may be 0) */
 131     HRGN          hVisRgn;       /* Visible region (must never be 0) */
 132     HPEN          hPen;
 133     HBRUSH        hBrush;
 134     HFONT         hFont;
 135     HBITMAP       hBitmap;
 136     HANDLE        hDevice;
 137     HPALETTE      hPalette;
 138
 139     GdiFont      *gdiFont;
 140     GdiPath       path;
 141
 142     UINT          font_code_page;
 143     WORD          ROPmode;
 144     WORD          polyFillMode;
 145     WORD          stretchBltMode;
 146     WORD          relAbsMode;
 147     WORD          backgroundMode;
 148     COLORREF      backgroundColor;
 149     COLORREF      textColor;
 150     COLORREF      dcBrushColor;
 151     COLORREF      dcPenColor;
 152     short         brushOrgX;
 153     short         brushOrgY;
 154
 155     DWORD         mapperFlags;       /* Font mapper flags */
 156     WORD          textAlign;         /* Text alignment from SetTextAlign() */
 157     INT           charExtra;         /* Spacing from SetTextCharacterExtra() */
 158     INT           breakExtra;        /* breakTotalExtra / breakCount */
 159     INT           breakRem;          /* breakTotalExtra % breakCount */
 160     INT           MapMode;
 161     INT           GraphicsMode;      /* Graphics mode */
 162     ABORTPROC     pAbortProc;        /* AbortProc for Printing */
 163     INT           CursPosX;          /* Current position */
 164     INT           CursPosY;
 165     INT           ArcDirection;
 166     XFORM         xformWorld2Wnd;    /* World-to-window transformation */
 167     XFORM         xformWorld2Vport;  /* World-to-viewport transformation */
 168     XFORM         xformVport2World;  /* Inverse of the above transformation */
 169     BOOL          vport2WorldValid;  /* Is xformVport2World valid? */
 170     RECT          BoundsRect;        /* Current bounding rect */
 171 } DC;
 172
 173   /* DC flags */
 174 #define DC_BOUNDS_ENABLE 0x0008   /* Bounding rectangle tracking is enabled */
 175
 176 /* Certain functions will do no further processing if the driver returns this.
 177    Used by mfdrv for example. */
 178 #define GDI_NO_MORE_WORK 2
 179
 180 /* Rounds a floating point number to integer. The world-to-viewport
 181  * transformation process is done in floating point internally. This function
 182  * is then used to round these coordinates to integer values.
 183  */
 184 static inline INT GDI_ROUND(double val)
 185 {
 186    return (int)floor(val + 0.5);
 187 }
 188
 189 #define GET_DC_PHYSDEV(dc,func) \
 190     get_physdev_entry_point( (dc)->physDev, FIELD_OFFSET(struct gdi_dc_funcs,func))
 191
 192 /* bitmap object */
 193
 194 typedef struct tagBITMAPOBJ
 195 {
 196     GDIOBJHDR           header;
 197     BITMAP              bitmap;
 198     SIZE                size;   /* For SetBitmapDimension() */
 199     const struct gdi_dc_funcs *funcs; /* DC function table */
 200     /* For device-independent bitmaps: */
 201     DIBSECTION         *dib;
 202     RGBQUAD            *color_table;  /* DIB color table if <= 8bpp */
 203     UINT                nb_colors;    /* number of colors in table */
 204 } BITMAPOBJ;
 205
 206 /* bidi.c */
 207
 208 /* Wine_GCPW Flags */
 209 /* Directionality -
 210  * LOOSE means taking the directionality of the first strong character, if there is found one.
 211  * FORCE means the paragraph direction is forced. (RLE/LRE)
 212  */
 213 #define WINE_GCPW_FORCE_LTR 0
 214 #define WINE_GCPW_FORCE_RTL 1
 215 #define WINE_GCPW_LOOSE_LTR 2
 216 #define WINE_GCPW_LOOSE_RTL 3
 217 #define WINE_GCPW_DIR_MASK 3
 218 #define WINE_GCPW_LOOSE_MASK 2
 219
 220 extern BOOL BIDI_Reorder( HDC hDC, LPCWSTR lpString, INT uCount, DWORD dwFlags, DWORD dwWineGCP_Flags,
 221                           LPWSTR lpOutString, INT uCountOut, UINT *lpOrder, WORD **lpGlyphs, INT* cGlyphs ) DECLSPEC_HIDDEN;
 222
 223 /* bitblt.c */
 224 extern DWORD convert_bits( const BITMAPINFO *src_info, struct bitblt_coords *src,
 225                            BITMAPINFO *dst_info, struct gdi_image_bits *bits, BOOL add_alpha ) DECLSPEC_HIDDEN;
 226 extern BOOL intersect_vis_rectangles( struct bitblt_coords *dst, struct bitblt_coords *src ) DECLSPEC_HIDDEN;
 227 extern DWORD stretch_bits( const BITMAPINFO *src_info, struct bitblt_coords *src,
 228                            BITMAPINFO *dst_info, struct bitblt_coords *dst,
 229                            struct gdi_image_bits *bits, int mode ) DECLSPEC_HIDDEN;
 230
 231 /* bitmap.c */
 232 extern void get_ddb_bitmapinfo( BITMAPOBJ *bmp, BITMAPINFO *info ) DECLSPEC_HIDDEN;
 233 extern BOOL get_bitmap_image( HBITMAP hbitmap, BITMAPINFO *info, struct gdi_image_bits *bits ) DECLSPEC_HIDDEN;
 234 extern HBITMAP BITMAP_CopyBitmap( HBITMAP hbitmap ) DECLSPEC_HIDDEN;
 235 extern BOOL BITMAP_SetOwnerDC( HBITMAP hbitmap, PHYSDEV physdev ) DECLSPEC_HIDDEN;
 236
 237 /* clipping.c */
 238 extern int get_clip_box( DC *dc, RECT *rect ) DECLSPEC_HIDDEN;
 239 extern void CLIPPING_UpdateGCRegion( DC * dc ) DECLSPEC_HIDDEN;
 240
 241 /* Return the total clip region (if any) */
 242 static inline HRGN get_clip_region( DC * dc )
 243 {
 244     if (dc->hMetaClipRgn) return dc->hMetaClipRgn;
 245     if (dc->hMetaRgn) return dc->hMetaRgn;
 246     return dc->hClipRgn;
 247 }
 248
 249 /* dc.c */
 250 extern DC *alloc_dc_ptr( WORD magic ) DECLSPEC_HIDDEN;
 251 extern void free_dc_ptr( DC *dc ) DECLSPEC_HIDDEN;
 252 extern DC *get_dc_ptr( HDC hdc ) DECLSPEC_HIDDEN;
 253 extern void release_dc_ptr( DC *dc ) DECLSPEC_HIDDEN;
 254 extern void update_dc( DC *dc ) DECLSPEC_HIDDEN;
 255 extern void DC_InitDC( DC * dc ) DECLSPEC_HIDDEN;
 256 extern void DC_UpdateXforms( DC * dc ) DECLSPEC_HIDDEN;
 257
 258 /* dib.c */
 259 extern int bitmap_info_size( const BITMAPINFO * info, WORD coloruse ) DECLSPEC_HIDDEN;
 260 extern DWORD convert_bitmapinfo( const BITMAPINFO *src_info, void *src_bits, struct bitblt_coords *src,
 261                                  const BITMAPINFO *dst_info, void *dst_bits, BOOL add_alpha ) DECLSPEC_HIDDEN;
 262
 263 extern DWORD stretch_bitmapinfo( const BITMAPINFO *src_info, void *src_bits, struct bitblt_coords *src,
 264                                  const BITMAPINFO *dst_info, void *dst_bits, struct bitblt_coords *dst,
 265                                  INT mode ) DECLSPEC_HIDDEN;
 266 extern DWORD blend_bitmapinfo( const BITMAPINFO *src_info, void *src_bits, struct bitblt_coords *src,
 267                                const BITMAPINFO *dst_info, void *dst_bits, struct bitblt_coords *dst,
 268                                BLENDFUNCTION blend ) DECLSPEC_HIDDEN;
 269
 270 /* driver.c */
 271 extern const struct gdi_dc_funcs null_driver DECLSPEC_HIDDEN;
 272 extern const struct gdi_dc_funcs dib_driver DECLSPEC_HIDDEN;
 273 extern const struct gdi_dc_funcs path_driver DECLSPEC_HIDDEN;
 274 extern const struct gdi_dc_funcs *font_driver DECLSPEC_HIDDEN;
 275 extern const struct gdi_dc_funcs *DRIVER_load_driver( LPCWSTR name ) DECLSPEC_HIDDEN;
 276 extern BOOL DRIVER_GetDriverName( LPCWSTR device, LPWSTR driver, DWORD size ) DECLSPEC_HIDDEN;
 277
 278 /* enhmetafile.c */
 279 extern HENHMETAFILE EMF_Create_HENHMETAFILE(ENHMETAHEADER *emh, BOOL on_disk ) DECLSPEC_HIDDEN;
 280
 281 /* freetype.c */
 282
 283 /* Undocumented structure filled in by GdiRealizationInfo */
 284 typedef struct
 285 {
 286     DWORD flags;       /* 1 for bitmap fonts, 3 for scalable fonts */
 287     DWORD cache_num;   /* keeps incrementing - num of fonts that have been created allowing for caching?? */
 288     DWORD unknown2;    /* fixed for a given font - looks like it could be the order of the face in the font list or the order
 289                           in which the face was first rendered. */
 290 } realization_info_t;
 291
 292
 293 extern INT WineEngAddFontResourceEx(LPCWSTR, DWORD, PVOID) DECLSPEC_HIDDEN;
 294 extern HANDLE WineEngAddFontMemResourceEx(PVOID, DWORD, PVOID, LPDWORD) DECLSPEC_HIDDEN;
 295 extern BOOL WineEngDestroyFontInstance(HFONT handle) DECLSPEC_HIDDEN;
 296 extern BOOL WineEngGetLinkedHFont(DC *dc, WCHAR c, HFONT *new_hfont, UINT *glyph) DECLSPEC_HIDDEN;
 297 extern BOOL WineEngInit(void) DECLSPEC_HIDDEN;
 298 extern BOOL WineEngRemoveFontResourceEx(LPCWSTR, DWORD, PVOID) DECLSPEC_HIDDEN;
 299
 300 /* gdiobj.c */
 301 extern HGDIOBJ alloc_gdi_handle( GDIOBJHDR *obj, WORD type, const struct gdi_obj_funcs *funcs ) DECLSPEC_HIDDEN;
 302 extern void *free_gdi_handle( HGDIOBJ handle ) DECLSPEC_HIDDEN;
 303 extern void *GDI_GetObjPtr( HGDIOBJ, WORD ) DECLSPEC_HIDDEN;
 304 extern void GDI_ReleaseObj( HGDIOBJ ) DECLSPEC_HIDDEN;
 305 extern void GDI_CheckNotLock(void) DECLSPEC_HIDDEN;
 306 extern HGDIOBJ GDI_inc_ref_count( HGDIOBJ handle ) DECLSPEC_HIDDEN;
 307 extern BOOL GDI_dec_ref_count( HGDIOBJ handle ) DECLSPEC_HIDDEN;
 308 extern BOOL GDI_hdc_using_object(HGDIOBJ obj, HDC hdc) DECLSPEC_HIDDEN;
 309 extern BOOL GDI_hdc_not_using_object(HGDIOBJ obj, HDC hdc) DECLSPEC_HIDDEN;
 310
 311 /* metafile.c */
 312 extern HMETAFILE MF_Create_HMETAFILE(METAHEADER *mh) DECLSPEC_HIDDEN;
 313 extern METAHEADER *MF_CreateMetaHeaderDisk(METAHEADER *mr, LPCVOID filename, BOOL unicode ) DECLSPEC_HIDDEN;
 314
 315 /* path.c */
 316
 317 #define PATH_IsPathOpen(path) ((path).state==PATH_Open)
 318 /* Returns TRUE if the specified path is in the open state, i.e. in the
 319  * state where points will be added to the path, or FALSE otherwise. This
 320  * function is implemented as a macro for performance reasons.
 321  */
 322
 323 extern void PATH_InitGdiPath(GdiPath *pPath) DECLSPEC_HIDDEN;
 324 extern void PATH_DestroyGdiPath(GdiPath *pPath) DECLSPEC_HIDDEN;
 325 extern BOOL PATH_SavePath( DC *dst, DC *src ) DECLSPEC_HIDDEN;
 326 extern BOOL PATH_RestorePath( DC *dst, DC *src ) DECLSPEC_HIDDEN;
 327
 328 extern BOOL PATH_Rectangle(DC *dc, INT x1, INT y1, INT x2, INT y2) DECLSPEC_HIDDEN;
 329 extern BOOL PATH_ExtTextOut(DC *dc, INT x, INT y, UINT flags, const RECT *lprc,
 330                             LPCWSTR str, UINT count, const INT *dx) DECLSPEC_HIDDEN;
 331 extern BOOL PATH_Ellipse(DC *dc, INT x1, INT y1, INT x2, INT y2) DECLSPEC_HIDDEN;
 332 extern BOOL PATH_Arc(DC *dc, INT x1, INT y1, INT x2, INT y2,
 333                      INT xStart, INT yStart, INT xEnd, INT yEnd, INT lines) DECLSPEC_HIDDEN;
 334 extern BOOL PATH_PolyBezierTo(DC *dc, const POINT *pt, DWORD cbCount) DECLSPEC_HIDDEN;
 335 extern BOOL PATH_PolyBezier(DC *dc, const POINT *pt, DWORD cbCount) DECLSPEC_HIDDEN;
 336 extern BOOL PATH_PolyDraw(DC *dc, const POINT *pts, const BYTE *types, DWORD cbCount) DECLSPEC_HIDDEN;
 337 extern BOOL PATH_PolylineTo(DC *dc, const POINT *pt, DWORD cbCount) DECLSPEC_HIDDEN;
 338 extern BOOL PATH_Polyline(DC *dc, const POINT *pt, DWORD cbCount) DECLSPEC_HIDDEN;
 339 extern BOOL PATH_Polygon(DC *dc, const POINT *pt, DWORD cbCount) DECLSPEC_HIDDEN;
 340 extern BOOL PATH_PolyPolyline(DC *dc, const POINT *pt, const DWORD *counts, DWORD polylines) DECLSPEC_HIDDEN;
 341 extern BOOL PATH_PolyPolygon(DC *dc, const POINT *pt, const INT *counts, UINT polygons) DECLSPEC_HIDDEN;
 342 extern BOOL PATH_RoundRect(DC *dc, INT x1, INT y1, INT x2, INT y2, INT ell_width, INT ell_height) DECLSPEC_HIDDEN;
 343
 344 /* painting.c */
 345 extern POINT *GDI_Bezier( const POINT *Points, INT count, INT *nPtsOut ) DECLSPEC_HIDDEN;
 346
 347 /* palette.c */
 348 extern HPALETTE WINAPI GDISelectPalette( HDC hdc, HPALETTE hpal, WORD wBkg) DECLSPEC_HIDDEN;
 349 extern UINT WINAPI GDIRealizePalette( HDC hdc ) DECLSPEC_HIDDEN;
 350 extern HPALETTE PALETTE_Init(void) DECLSPEC_HIDDEN;
 351
 352 /* region.c */
 353 extern INT mirror_region( HRGN dst, HRGN src, INT width ) DECLSPEC_HIDDEN;
 354 extern BOOL REGION_FrameRgn( HRGN dest, HRGN src, INT x, INT y ) DECLSPEC_HIDDEN;
 355
 356 typedef struct
 357 {
 358     INT size;
 359     INT numRects;
 360     RECT *rects;
 361     RECT extents;
 362 } WINEREGION;
 363 extern const WINEREGION *get_wine_region(HRGN rgn) DECLSPEC_HIDDEN;
 364 static inline void release_wine_region(HRGN rgn)
 365 {
 366     GDI_ReleaseObj(rgn);
 367 }
 368
 369 /* null driver entry points */
 370 extern BOOL nulldrv_AbortPath( PHYSDEV dev ) DECLSPEC_HIDDEN;
 371 extern BOOL nulldrv_AlphaBlend( PHYSDEV dst_dev, struct bitblt_coords *dst,
 372                                 PHYSDEV src_dev, struct bitblt_coords *src, BLENDFUNCTION func) DECLSPEC_HIDDEN;
 373 extern BOOL nulldrv_AngleArc( PHYSDEV dev, INT x, INT y, DWORD radius, FLOAT start, FLOAT sweep ) DECLSPEC_HIDDEN;
 374 extern BOOL nulldrv_ArcTo( PHYSDEV dev, INT left, INT top, INT right, INT bottom, INT xstart, INT ystart, INT xend, INT yend ) DECLSPEC_HIDDEN;
 375 extern BOOL nulldrv_BeginPath( PHYSDEV dev ) DECLSPEC_HIDDEN;
 376 extern DWORD nulldrv_BlendImage( PHYSDEV dev, BITMAPINFO *info, const struct gdi_image_bits *bits,
 377                                  struct bitblt_coords *src, struct bitblt_coords *dst, BLENDFUNCTION func ) DECLSPEC_HIDDEN;
 378 extern BOOL nulldrv_CloseFigure( PHYSDEV dev ) DECLSPEC_HIDDEN;
 379 extern BOOL nulldrv_EndPath( PHYSDEV dev ) DECLSPEC_HIDDEN;
 380 extern INT  nulldrv_ExcludeClipRect( PHYSDEV dev, INT left, INT top, INT right, INT bottom ) DECLSPEC_HIDDEN;
 381 extern INT  nulldrv_ExtSelectClipRgn( PHYSDEV dev, HRGN rgn, INT mode ) DECLSPEC_HIDDEN;
 382 extern BOOL nulldrv_FillPath( PHYSDEV dev ) DECLSPEC_HIDDEN;
 383 extern BOOL nulldrv_FillRgn( PHYSDEV dev, HRGN rgn, HBRUSH brush ) DECLSPEC_HIDDEN;
 384 extern BOOL nulldrv_FlattenPath( PHYSDEV dev ) DECLSPEC_HIDDEN;
 385 extern BOOL nulldrv_FrameRgn( PHYSDEV dev, HRGN rgn, HBRUSH brush, INT width, INT height ) DECLSPEC_HIDDEN;
 386 extern LONG nulldrv_GetBitmapBits( HBITMAP bitmap, void *bits, LONG size ) DECLSPEC_HIDDEN;
 387 extern DWORD nulldrv_GetImage( PHYSDEV dev, HBITMAP hbitmap, BITMAPINFO *info, struct gdi_image_bits *bits, struct bitblt_coords *src ) DECLSPEC_HIDDEN;
 388 extern COLORREF nulldrv_GetNearestColor( PHYSDEV dev, COLORREF color ) DECLSPEC_HIDDEN;
 389 extern INT  nulldrv_IntersectClipRect( PHYSDEV dev, INT left, INT top, INT right, INT bottom ) DECLSPEC_HIDDEN;
 390 extern BOOL nulldrv_InvertRgn( PHYSDEV dev, HRGN rgn ) DECLSPEC_HIDDEN;
 391 extern BOOL nulldrv_ModifyWorldTransform( PHYSDEV dev, const XFORM *xform, DWORD mode ) DECLSPEC_HIDDEN;
 392 extern INT  nulldrv_OffsetClipRgn( PHYSDEV dev, INT x, INT y ) DECLSPEC_HIDDEN;
 393 extern BOOL nulldrv_OffsetViewportOrgEx( PHYSDEV dev, INT x, INT y, POINT *pt ) DECLSPEC_HIDDEN;
 394 extern BOOL nulldrv_OffsetWindowOrgEx( PHYSDEV dev, INT x, INT y, POINT *pt ) DECLSPEC_HIDDEN;
 395 extern BOOL nulldrv_PolyBezier( PHYSDEV dev, const POINT *points, DWORD count ) DECLSPEC_HIDDEN;
 396 extern BOOL nulldrv_PolyBezierTo( PHYSDEV dev, const POINT *points, DWORD count ) DECLSPEC_HIDDEN;
 397 extern BOOL nulldrv_PolyDraw( PHYSDEV dev, const POINT *points, const BYTE *types, DWORD count ) DECLSPEC_HIDDEN;
 398 extern BOOL nulldrv_PolylineTo( PHYSDEV dev, const POINT *points, INT count ) DECLSPEC_HIDDEN;
 399 extern DWORD nulldrv_PutImage( PHYSDEV dev, HBITMAP hbitmap, HRGN clip, BITMAPINFO *info,
 400                                const struct gdi_image_bits *bits, struct bitblt_coords *src,
 401                                struct bitblt_coords *dst, DWORD rop ) DECLSPEC_HIDDEN;
 402 extern BOOL nulldrv_RestoreDC( PHYSDEV dev, INT level ) DECLSPEC_HIDDEN;
 403 extern INT  nulldrv_SaveDC( PHYSDEV dev ) DECLSPEC_HIDDEN;
 404 extern BOOL nulldrv_ScaleViewportExtEx( PHYSDEV dev, INT x_num, INT x_denom, INT y_num, INT y_denom, SIZE *size ) DECLSPEC_HIDDEN;
 405 extern BOOL nulldrv_ScaleWindowExtEx( PHYSDEV dev, INT x_num, INT x_denom, INT y_num, INT y_denom, SIZE *size ) DECLSPEC_HIDDEN;
 406 extern BOOL nulldrv_SelectClipPath( PHYSDEV dev, INT mode ) DECLSPEC_HIDDEN;
 407 extern INT nulldrv_SetDIBitsToDevice( PHYSDEV dev, INT x_dst, INT y_dst, DWORD width, DWORD height,
 408                                       INT x_src, INT y_src, UINT start, UINT lines,
 409                                       const void *bits, BITMAPINFO *info, UINT coloruse ) DECLSPEC_HIDDEN;
 410 extern INT  nulldrv_SetMapMode( PHYSDEV dev, INT mode ) DECLSPEC_HIDDEN;
 411 extern BOOL nulldrv_SetViewportExtEx( PHYSDEV dev, INT cx, INT cy, SIZE *size ) DECLSPEC_HIDDEN;
 412 extern BOOL nulldrv_SetViewportOrgEx( PHYSDEV dev, INT x, INT y, POINT *pt ) DECLSPEC_HIDDEN;
 413 extern BOOL nulldrv_SetWindowExtEx( PHYSDEV dev, INT cx, INT cy, SIZE *size ) DECLSPEC_HIDDEN;
 414 extern BOOL nulldrv_SetWindowOrgEx( PHYSDEV dev, INT x, INT y, POINT *pt ) DECLSPEC_HIDDEN;
 415 extern BOOL nulldrv_SetWorldTransform( PHYSDEV dev, const XFORM *xform ) DECLSPEC_HIDDEN;
 416 extern BOOL nulldrv_StretchBlt( PHYSDEV dst_dev, struct bitblt_coords *dst,
 417                                 PHYSDEV src_dev, struct bitblt_coords *src, DWORD rop ) DECLSPEC_HIDDEN;
 418 extern INT  nulldrv_StretchDIBits( PHYSDEV dev, INT xDst, INT yDst, INT widthDst, INT heightDst,
 419                                    INT xSrc, INT ySrc, INT widthSrc, INT heightSrc, const void *bits,
 420                                    BITMAPINFO *info, UINT coloruse, DWORD rop ) DECLSPEC_HIDDEN;
 421 extern BOOL nulldrv_StrokeAndFillPath( PHYSDEV dev ) DECLSPEC_HIDDEN;
 422 extern BOOL nulldrv_StrokePath( PHYSDEV dev ) DECLSPEC_HIDDEN;
 423 extern BOOL nulldrv_WidenPath( PHYSDEV dev ) DECLSPEC_HIDDEN;
 424
 425 static inline DC *get_nulldrv_dc( PHYSDEV dev )
 426 {
 427     return CONTAINING_RECORD( dev, DC, nulldrv );
 428 }
 429
 430 /* Undocumented value for DIB's iUsage: Indicates a mono DIB w/o pal entries */
 431 #define DIB_PAL_MONO 2
 432
 433 BOOL WINAPI FontIsLinked(HDC);
 434
 435 BOOL WINAPI SetVirtualResolution(HDC hdc, DWORD horz_res, DWORD vert_res, DWORD horz_size, DWORD vert_size);
 436
 437 static inline BOOL is_rect_empty( const RECT *rect )
 438 {
 439     return (rect->left >= rect->right || rect->top >= rect->bottom);
 440 }
 441
 442 static inline BOOL intersect_rect( RECT *dst, const RECT *src1, const RECT *src2 )
 443 {
 444     dst->left   = max( src1->left, src2->left );
 445     dst->top    = max( src1->top, src2->top );
 446     dst->right  = min( src1->right, src2->right );
 447     dst->bottom = min( src1->bottom, src2->bottom );
 448     return !is_rect_empty( dst );
 449 }
 450
 451 static inline void offset_rect( RECT *rect, int offset_x, int offset_y )
 452 {
 453     rect->left   += offset_x;
 454     rect->top    += offset_y;
 455     rect->right  += offset_x;
 456     rect->bottom += offset_y;
 457 }
 458
 459 static inline BOOL pt_in_rect( const RECT *rect, POINT pt )
 460 {
 461     return ((pt.x >= rect->left) && (pt.x < rect->right) &&
 462             (pt.y >= rect->top) && (pt.y < rect->bottom));
 463 }
 464
 465 static inline void get_bounding_rect( RECT *rect, int x, int y, int width, int height )
 466 {
 467     rect->left   = x;
 468     rect->right  = x + width;
 469     rect->top    = y;
 470     rect->bottom = y + height;
 471     if (rect->left > rect->right)
 472     {
 473         int tmp = rect->left;
 474         rect->left = rect->right + 1;
 475         rect->right = tmp + 1;
 476     }
 477     if (rect->top > rect->bottom)
 478     {
 479         int tmp = rect->top;
 480         rect->top = rect->bottom + 1;
 481         rect->bottom = tmp + 1;
 482     }
 483 }
 484
 485 static inline int get_bitmap_stride( int width, int bpp )
 486 {
 487     return ((width * bpp + 15) >> 3) & ~1;
 488 }
 489
 490 static inline int get_dib_stride( int width, int bpp )
 491 {
 492     return ((width * bpp + 31) >> 3) & ~3;
 493 }
 494
 495 static inline int get_dib_image_size( const BITMAPINFO *info )
 496 {
 497     return get_dib_stride( info->bmiHeader.biWidth, info->bmiHeader.biBitCount )
 498         * abs( info->bmiHeader.biHeight );
 499 }
 500
 501 static inline int get_dib_num_of_colors( const BITMAPINFO *info )
 502 {
 503     if (info->bmiHeader.biClrUsed) return min( info->bmiHeader.biClrUsed, 256 );
 504     return info->bmiHeader.biBitCount > 8 ? 0 : 1 << info->bmiHeader.biBitCount;
 505 }
 506
 507 static inline const struct gdi_dc_funcs *get_bitmap_funcs( const BITMAPOBJ *bitmap )
 508 {
 509     if( bitmap->dib ) return &dib_driver;
 510     return bitmap->funcs;
 511 }
 512
 513 extern void free_heap_bits( struct gdi_image_bits *bits ) DECLSPEC_HIDDEN;
 514
 515 #endif /* __WINE_GDI_PRIVATE_H */