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 typedef struct tagGdiFont GdiFont;
  76
  77 typedef struct tagDC
  78 {
  79     GDIOBJHDR    header;
  80     HDC          hSelf;            /* Handle to this DC */
  81     struct gdi_physdev nulldrv;    /* physdev for the null driver */
  82     PHYSDEV      dibdrv;           /* physdev for the dib driver */
  83     PHYSDEV      physDev;          /* current top of the physdev stack */
  84     DWORD        thread;           /* thread owning the DC */
  85     LONG         refcount;         /* thread refcount */
  86     LONG         dirty;            /* dirty flag */
  87     INT          saveLevel;
  88     struct tagDC *saved_dc;
  89     DWORD_PTR    dwHookData;
  90     DCHOOKPROC   hookProc;         /* DC hook */
  91
  92     INT          wndOrgX;          /* Window origin */
  93     INT          wndOrgY;
  94     INT          wndExtX;          /* Window extent */
  95     INT          wndExtY;
  96     INT          vportOrgX;        /* Viewport origin */
  97     INT          vportOrgY;
  98     INT          vportExtX;        /* Viewport extent */
  99     INT          vportExtY;
 100     SIZE         virtual_res;      /* Initially HORZRES,VERTRES. Changed by SetVirtualResolution */
 101     SIZE         virtual_size;     /* Initially HORZSIZE,VERTSIZE. Changed by SetVirtualResolution */
 102     RECT         vis_rect;         /* visible rectangle in screen coords */
 103     FLOAT        miterLimit;
 104
 105     int           flags;
 106     DWORD         layout;
 107     HRGN          hClipRgn;      /* Clip region */
 108     HRGN          hMetaRgn;      /* Meta region */
 109     HRGN          hVisRgn;       /* Visible region */
 110     HRGN          region;        /* Total DC region (intersection of clip and visible) */
 111     HPEN          hPen;
 112     HBRUSH        hBrush;
 113     HFONT         hFont;
 114     HBITMAP       hBitmap;
 115     HANDLE        hDevice;
 116     HPALETTE      hPalette;
 117
 118     GdiFont      *gdiFont;
 119     struct gdi_path *path;
 120
 121     UINT          font_code_page;
 122     WORD          ROPmode;
 123     WORD          polyFillMode;
 124     WORD          stretchBltMode;
 125     WORD          relAbsMode;
 126     WORD          backgroundMode;
 127     COLORREF      backgroundColor;
 128     COLORREF      textColor;
 129     COLORREF      dcBrushColor;
 130     COLORREF      dcPenColor;
 131     short         brushOrgX;
 132     short         brushOrgY;
 133
 134     DWORD         mapperFlags;       /* Font mapper flags */
 135     WORD          textAlign;         /* Text alignment from SetTextAlign() */
 136     INT           charExtra;         /* Spacing from SetTextCharacterExtra() */
 137     INT           breakExtra;        /* breakTotalExtra / breakCount */
 138     INT           breakRem;          /* breakTotalExtra % breakCount */
 139     INT           MapMode;
 140     INT           GraphicsMode;      /* Graphics mode */
 141     ABORTPROC     pAbortProc;        /* AbortProc for Printing */
 142     INT           CursPosX;          /* Current position */
 143     INT           CursPosY;
 144     INT           ArcDirection;
 145     XFORM         xformWorld2Wnd;    /* World-to-window transformation */
 146     XFORM         xformWorld2Vport;  /* World-to-viewport transformation */
 147     XFORM         xformVport2World;  /* Inverse of the above transformation */
 148     BOOL          vport2WorldValid;  /* Is xformVport2World valid? */
 149     RECT          BoundsRect;        /* Current bounding rect */
 150 } DC;
 151
 152   /* DC flags */
 153 #define DC_PATH_OPEN     0x0001   /* DC path is open (only set on saved DCs) */
 154 #define DC_BOUNDS_ENABLE 0x0008   /* Bounding rectangle tracking is enabled */
 155
 156 /* Certain functions will do no further processing if the driver returns this.
 157    Used by mfdrv for example. */
 158 #define GDI_NO_MORE_WORK 2
 159
 160 /* Rounds a floating point number to integer. The world-to-viewport
 161  * transformation process is done in floating point internally. This function
 162  * is then used to round these coordinates to integer values.
 163  */
 164 static inline INT GDI_ROUND(double val)
 165 {
 166    return (int)floor(val + 0.5);
 167 }
 168
 169 #define GET_DC_PHYSDEV(dc,func) \
 170     get_physdev_entry_point( (dc)->physDev, FIELD_OFFSET(struct gdi_dc_funcs,func))
 171
 172 /* bitmap object */
 173
 174 typedef struct tagBITMAPOBJ
 175 {
 176     GDIOBJHDR           header;
 177     BITMAP              bitmap;
 178     SIZE                size;   /* For SetBitmapDimension() */
 179     const struct gdi_dc_funcs *funcs; /* DC function table */
 180     /* For device-independent bitmaps: */
 181     DIBSECTION         *dib;
 182     RGBQUAD            *color_table;  /* DIB color table if <= 8bpp (always 1 << bpp in size) */
 183 } BITMAPOBJ;
 184
 185 /* bidi.c */
 186
 187 /* Wine_GCPW Flags */
 188 /* Directionality -
 189  * LOOSE means taking the directionality of the first strong character, if there is found one.
 190  * FORCE means the paragraph direction is forced. (RLE/LRE)
 191  */
 192 #define WINE_GCPW_FORCE_LTR 0
 193 #define WINE_GCPW_FORCE_RTL 1
 194 #define WINE_GCPW_LOOSE_LTR 2
 195 #define WINE_GCPW_LOOSE_RTL 3
 196 #define WINE_GCPW_DIR_MASK 3
 197 #define WINE_GCPW_LOOSE_MASK 2
 198
 199 extern BOOL BIDI_Reorder( HDC hDC, LPCWSTR lpString, INT uCount, DWORD dwFlags, DWORD dwWineGCP_Flags,
 200                           LPWSTR lpOutString, INT uCountOut, UINT *lpOrder, WORD **lpGlyphs, INT* cGlyphs ) DECLSPEC_HIDDEN;
 201
 202 /* bitblt.c */
 203 extern DWORD convert_bits( const BITMAPINFO *src_info, struct bitblt_coords *src,
 204                            BITMAPINFO *dst_info, struct gdi_image_bits *bits, BOOL add_alpha ) DECLSPEC_HIDDEN;
 205 extern BOOL intersect_vis_rectangles( struct bitblt_coords *dst, struct bitblt_coords *src ) DECLSPEC_HIDDEN;
 206 extern DWORD stretch_bits( const BITMAPINFO *src_info, struct bitblt_coords *src,
 207                            BITMAPINFO *dst_info, struct bitblt_coords *dst,
 208                            struct gdi_image_bits *bits, int mode ) DECLSPEC_HIDDEN;
 209
 210 /* brush.c */
 211 extern BOOL get_brush_bitmap_info( HBRUSH handle, BITMAPINFO *info, void **bits, UINT *usage ) DECLSPEC_HIDDEN;
 212
 213 /* clipping.c */
 214 extern BOOL clip_visrect( DC *dc, RECT *dst, const RECT *src ) DECLSPEC_HIDDEN;
 215 extern void update_dc_clipping( DC * dc ) DECLSPEC_HIDDEN;
 216
 217 /* Return the total DC region (if any) */
 218 static inline HRGN get_dc_region( DC *dc )
 219 {
 220     if (dc->region) return dc->region;
 221     if (dc->hVisRgn) return dc->hVisRgn;
 222     if (dc->hClipRgn) return dc->hClipRgn;
 223     return dc->hMetaRgn;
 224 }
 225
 226 /* dc.c */
 227 extern DC *alloc_dc_ptr( WORD magic ) DECLSPEC_HIDDEN;
 228 extern void free_dc_ptr( DC *dc ) DECLSPEC_HIDDEN;
 229 extern DC *get_dc_ptr( HDC hdc ) DECLSPEC_HIDDEN;
 230 extern void release_dc_ptr( DC *dc ) DECLSPEC_HIDDEN;
 231 extern void update_dc( DC *dc ) DECLSPEC_HIDDEN;
 232 extern void DC_InitDC( DC * dc ) DECLSPEC_HIDDEN;
 233 extern void DC_UpdateXforms( DC * dc ) DECLSPEC_HIDDEN;
 234
 235 /* dib.c */
 236 extern int bitmap_info_size( const BITMAPINFO * info, WORD coloruse ) DECLSPEC_HIDDEN;
 237 extern BOOL fill_color_table_from_pal_colors( BITMAPINFO *info, HDC hdc ) DECLSPEC_HIDDEN;
 238 extern void fill_default_color_table( BITMAPINFO *info ) DECLSPEC_HIDDEN;
 239 extern void get_ddb_bitmapinfo( BITMAPOBJ *bmp, BITMAPINFO *info ) DECLSPEC_HIDDEN;
 240 extern BITMAPINFO *copy_packed_dib( const BITMAPINFO *src_info, UINT usage ) DECLSPEC_HIDDEN;
 241 extern DWORD convert_bitmapinfo( const BITMAPINFO *src_info, void *src_bits, struct bitblt_coords *src,
 242                                  const BITMAPINFO *dst_info, void *dst_bits, BOOL add_alpha ) DECLSPEC_HIDDEN;
 243
 244 extern DWORD stretch_bitmapinfo( const BITMAPINFO *src_info, void *src_bits, struct bitblt_coords *src,
 245                                  const BITMAPINFO *dst_info, void *dst_bits, struct bitblt_coords *dst,
 246                                  INT mode ) DECLSPEC_HIDDEN;
 247 extern DWORD blend_bitmapinfo( const BITMAPINFO *src_info, void *src_bits, struct bitblt_coords *src,
 248                                const BITMAPINFO *dst_info, void *dst_bits, struct bitblt_coords *dst,
 249                                BLENDFUNCTION blend ) DECLSPEC_HIDDEN;
 250 extern DWORD gradient_bitmapinfo( const BITMAPINFO *info, void *bits, TRIVERTEX *vert_array, ULONG nvert,
 251                                   void *grad_array, ULONG ngrad, ULONG mode, const POINT *dev_pts, HRGN rgn ) DECLSPEC_HIDDEN;
 252 extern BOOL render_aa_text_bitmapinfo( HDC hdc, BITMAPINFO *info, struct gdi_image_bits *bits,
 253                                        struct bitblt_coords *src, INT x, INT y, UINT flags,
 254                                        UINT aa_flags, LPCWSTR str, UINT count, const INT *dx ) DECLSPEC_HIDDEN;
 255
 256 /* driver.c */
 257 extern const struct gdi_dc_funcs null_driver DECLSPEC_HIDDEN;
 258 extern const struct gdi_dc_funcs dib_driver DECLSPEC_HIDDEN;
 259 extern const struct gdi_dc_funcs path_driver DECLSPEC_HIDDEN;
 260 extern const struct gdi_dc_funcs *font_driver DECLSPEC_HIDDEN;
 261 extern const struct gdi_dc_funcs *DRIVER_load_driver( LPCWSTR name ) DECLSPEC_HIDDEN;
 262 extern BOOL DRIVER_GetDriverName( LPCWSTR device, LPWSTR driver, DWORD size ) DECLSPEC_HIDDEN;
 263
 264 /* enhmetafile.c */
 265 extern HENHMETAFILE EMF_Create_HENHMETAFILE(ENHMETAHEADER *emh, BOOL on_disk ) DECLSPEC_HIDDEN;
 266
 267 /* font.c */
 268 extern UINT get_font_aa_flags( HDC hdc ) DECLSPEC_HIDDEN;
 269
 270 /* freetype.c */
 271
 272 /* Undocumented structure filled in by GdiRealizationInfo */
 273 typedef struct
 274 {
 275     DWORD flags;       /* 1 for bitmap fonts, 3 for scalable fonts */
 276     DWORD cache_num;   /* keeps incrementing - num of fonts that have been created allowing for caching?? */
 277     DWORD unknown2;    /* fixed for a given font - looks like it could be the order of the face in the font list or the order
 278                           in which the face was first rendered. */
 279 } realization_info_t;
 280
 281
 282 extern INT WineEngAddFontResourceEx(LPCWSTR, DWORD, PVOID) DECLSPEC_HIDDEN;
 283 extern HANDLE WineEngAddFontMemResourceEx(PVOID, DWORD, PVOID, LPDWORD) DECLSPEC_HIDDEN;
 284 extern BOOL WineEngDestroyFontInstance(HFONT handle) DECLSPEC_HIDDEN;
 285 extern BOOL WineEngGetLinkedHFont(DC *dc, WCHAR c, HFONT *new_hfont, UINT *glyph) DECLSPEC_HIDDEN;
 286 extern BOOL WineEngInit(void) DECLSPEC_HIDDEN;
 287 extern BOOL WineEngRemoveFontResourceEx(LPCWSTR, DWORD, PVOID) DECLSPEC_HIDDEN;
 288
 289 /* gdiobj.c */
 290 extern HGDIOBJ alloc_gdi_handle( GDIOBJHDR *obj, WORD type, const struct gdi_obj_funcs *funcs ) DECLSPEC_HIDDEN;
 291 extern void *free_gdi_handle( HGDIOBJ handle ) DECLSPEC_HIDDEN;
 292 extern void *GDI_GetObjPtr( HGDIOBJ, WORD ) DECLSPEC_HIDDEN;
 293 extern void GDI_ReleaseObj( HGDIOBJ ) DECLSPEC_HIDDEN;
 294 extern void GDI_CheckNotLock(void) DECLSPEC_HIDDEN;
 295 extern HGDIOBJ GDI_inc_ref_count( HGDIOBJ handle ) DECLSPEC_HIDDEN;
 296 extern BOOL GDI_dec_ref_count( HGDIOBJ handle ) DECLSPEC_HIDDEN;
 297 extern BOOL GDI_hdc_using_object(HGDIOBJ obj, HDC hdc) DECLSPEC_HIDDEN;
 298 extern BOOL GDI_hdc_not_using_object(HGDIOBJ obj, HDC hdc) DECLSPEC_HIDDEN;
 299
 300 /* metafile.c */
 301 extern HMETAFILE MF_Create_HMETAFILE(METAHEADER *mh) DECLSPEC_HIDDEN;
 302 extern METAHEADER *MF_CreateMetaHeaderDisk(METAHEADER *mr, LPCVOID filename, BOOL unicode ) DECLSPEC_HIDDEN;
 303
 304 /* path.c */
 305
 306 extern void free_gdi_path( struct gdi_path *path ) DECLSPEC_HIDDEN;
 307 extern BOOL PATH_SavePath( DC *dst, DC *src ) DECLSPEC_HIDDEN;
 308 extern BOOL PATH_RestorePath( DC *dst, DC *src ) DECLSPEC_HIDDEN;
 309
 310 /* painting.c */
 311 extern POINT *GDI_Bezier( const POINT *Points, INT count, INT *nPtsOut ) DECLSPEC_HIDDEN;
 312
 313 /* palette.c */
 314 extern HPALETTE WINAPI GDISelectPalette( HDC hdc, HPALETTE hpal, WORD wBkg) DECLSPEC_HIDDEN;
 315 extern UINT WINAPI GDIRealizePalette( HDC hdc ) DECLSPEC_HIDDEN;
 316 extern HPALETTE PALETTE_Init(void) DECLSPEC_HIDDEN;
 317
 318 /* region.c */
 319 extern INT mirror_region( HRGN dst, HRGN src, INT width ) DECLSPEC_HIDDEN;
 320 extern BOOL REGION_FrameRgn( HRGN dest, HRGN src, INT x, INT y ) DECLSPEC_HIDDEN;
 321
 322 typedef struct
 323 {
 324     INT size;
 325     INT numRects;
 326     RECT *rects;
 327     RECT extents;
 328 } WINEREGION;
 329 extern const WINEREGION *get_wine_region(HRGN rgn) DECLSPEC_HIDDEN;
 330 static inline void release_wine_region(HRGN rgn)
 331 {
 332     GDI_ReleaseObj(rgn);
 333 }
 334
 335 /* null driver entry points */
 336 extern BOOL nulldrv_AbortPath( PHYSDEV dev ) DECLSPEC_HIDDEN;
 337 extern BOOL nulldrv_AlphaBlend( PHYSDEV dst_dev, struct bitblt_coords *dst,
 338                                 PHYSDEV src_dev, struct bitblt_coords *src, BLENDFUNCTION func) DECLSPEC_HIDDEN;
 339 extern BOOL nulldrv_AngleArc( PHYSDEV dev, INT x, INT y, DWORD radius, FLOAT start, FLOAT sweep ) DECLSPEC_HIDDEN;
 340 extern BOOL nulldrv_ArcTo( PHYSDEV dev, INT left, INT top, INT right, INT bottom, INT xstart, INT ystart, INT xend, INT yend ) DECLSPEC_HIDDEN;
 341 extern BOOL nulldrv_BeginPath( PHYSDEV dev ) DECLSPEC_HIDDEN;
 342 extern DWORD nulldrv_BlendImage( PHYSDEV dev, BITMAPINFO *info, const struct gdi_image_bits *bits,
 343                                  struct bitblt_coords *src, struct bitblt_coords *dst, BLENDFUNCTION func ) DECLSPEC_HIDDEN;
 344 extern BOOL nulldrv_CloseFigure( PHYSDEV dev ) DECLSPEC_HIDDEN;
 345 extern BOOL nulldrv_CopyBitmap( HBITMAP src, HBITMAP dst ) DECLSPEC_HIDDEN;
 346 extern BOOL nulldrv_EndPath( PHYSDEV dev ) DECLSPEC_HIDDEN;
 347 extern INT  nulldrv_ExcludeClipRect( PHYSDEV dev, INT left, INT top, INT right, INT bottom ) DECLSPEC_HIDDEN;
 348 extern INT  nulldrv_ExtSelectClipRgn( PHYSDEV dev, HRGN rgn, INT mode ) DECLSPEC_HIDDEN;
 349 extern BOOL nulldrv_ExtTextOut( PHYSDEV dev, INT x, INT y, UINT flags, const RECT *rect,
 350                                 LPCWSTR str, UINT count, const INT *dx ) DECLSPEC_HIDDEN;
 351 extern BOOL nulldrv_FillPath( PHYSDEV dev ) DECLSPEC_HIDDEN;
 352 extern BOOL nulldrv_FillRgn( PHYSDEV dev, HRGN rgn, HBRUSH brush ) DECLSPEC_HIDDEN;
 353 extern BOOL nulldrv_FlattenPath( PHYSDEV dev ) DECLSPEC_HIDDEN;
 354 extern BOOL nulldrv_FrameRgn( PHYSDEV dev, HRGN rgn, HBRUSH brush, INT width, INT height ) DECLSPEC_HIDDEN;
 355 extern LONG nulldrv_GetBitmapBits( HBITMAP bitmap, void *bits, LONG size ) DECLSPEC_HIDDEN;
 356 extern DWORD nulldrv_GetImage( PHYSDEV dev, HBITMAP hbitmap, BITMAPINFO *info, struct gdi_image_bits *bits, struct bitblt_coords *src ) DECLSPEC_HIDDEN;
 357 extern COLORREF nulldrv_GetNearestColor( PHYSDEV dev, COLORREF color ) DECLSPEC_HIDDEN;
 358 extern BOOL nulldrv_GradientFill( PHYSDEV dev, TRIVERTEX *vert_array, ULONG nvert,
 359                                   void * grad_array, ULONG ngrad, ULONG mode ) DECLSPEC_HIDDEN;
 360 extern INT  nulldrv_IntersectClipRect( PHYSDEV dev, INT left, INT top, INT right, INT bottom ) DECLSPEC_HIDDEN;
 361 extern BOOL nulldrv_InvertRgn( PHYSDEV dev, HRGN rgn ) DECLSPEC_HIDDEN;
 362 extern BOOL nulldrv_ModifyWorldTransform( PHYSDEV dev, const XFORM *xform, DWORD mode ) DECLSPEC_HIDDEN;
 363 extern INT  nulldrv_OffsetClipRgn( PHYSDEV dev, INT x, INT y ) DECLSPEC_HIDDEN;
 364 extern BOOL nulldrv_OffsetViewportOrgEx( PHYSDEV dev, INT x, INT y, POINT *pt ) DECLSPEC_HIDDEN;
 365 extern BOOL nulldrv_OffsetWindowOrgEx( PHYSDEV dev, INT x, INT y, POINT *pt ) DECLSPEC_HIDDEN;
 366 extern BOOL nulldrv_PolyBezier( PHYSDEV dev, const POINT *points, DWORD count ) DECLSPEC_HIDDEN;
 367 extern BOOL nulldrv_PolyBezierTo( PHYSDEV dev, const POINT *points, DWORD count ) DECLSPEC_HIDDEN;
 368 extern BOOL nulldrv_PolyDraw( PHYSDEV dev, const POINT *points, const BYTE *types, DWORD count ) DECLSPEC_HIDDEN;
 369 extern BOOL nulldrv_PolylineTo( PHYSDEV dev, const POINT *points, INT count ) DECLSPEC_HIDDEN;
 370 extern DWORD nulldrv_PutImage( PHYSDEV dev, HBITMAP hbitmap, HRGN clip, BITMAPINFO *info,
 371                                const struct gdi_image_bits *bits, struct bitblt_coords *src,
 372                                struct bitblt_coords *dst, DWORD rop ) DECLSPEC_HIDDEN;
 373 extern BOOL nulldrv_RestoreDC( PHYSDEV dev, INT level ) DECLSPEC_HIDDEN;
 374 extern INT  nulldrv_SaveDC( PHYSDEV dev ) DECLSPEC_HIDDEN;
 375 extern BOOL nulldrv_ScaleViewportExtEx( PHYSDEV dev, INT x_num, INT x_denom, INT y_num, INT y_denom, SIZE *size ) DECLSPEC_HIDDEN;
 376 extern BOOL nulldrv_ScaleWindowExtEx( PHYSDEV dev, INT x_num, INT x_denom, INT y_num, INT y_denom, SIZE *size ) DECLSPEC_HIDDEN;
 377 extern BOOL nulldrv_SelectClipPath( PHYSDEV dev, INT mode ) DECLSPEC_HIDDEN;
 378 extern INT nulldrv_SetDIBitsToDevice( PHYSDEV dev, INT x_dst, INT y_dst, DWORD width, DWORD height,
 379                                       INT x_src, INT y_src, UINT start, UINT lines,
 380                                       const void *bits, BITMAPINFO *info, UINT coloruse ) DECLSPEC_HIDDEN;
 381 extern INT  nulldrv_SetMapMode( PHYSDEV dev, INT mode ) DECLSPEC_HIDDEN;
 382 extern BOOL nulldrv_SetViewportExtEx( PHYSDEV dev, INT cx, INT cy, SIZE *size ) DECLSPEC_HIDDEN;
 383 extern BOOL nulldrv_SetViewportOrgEx( PHYSDEV dev, INT x, INT y, POINT *pt ) DECLSPEC_HIDDEN;
 384 extern BOOL nulldrv_SetWindowExtEx( PHYSDEV dev, INT cx, INT cy, SIZE *size ) DECLSPEC_HIDDEN;
 385 extern BOOL nulldrv_SetWindowOrgEx( PHYSDEV dev, INT x, INT y, POINT *pt ) DECLSPEC_HIDDEN;
 386 extern BOOL nulldrv_SetWorldTransform( PHYSDEV dev, const XFORM *xform ) DECLSPEC_HIDDEN;
 387 extern BOOL nulldrv_StretchBlt( PHYSDEV dst_dev, struct bitblt_coords *dst,
 388                                 PHYSDEV src_dev, struct bitblt_coords *src, DWORD rop ) DECLSPEC_HIDDEN;
 389 extern INT  nulldrv_StretchDIBits( PHYSDEV dev, INT xDst, INT yDst, INT widthDst, INT heightDst,
 390                                    INT xSrc, INT ySrc, INT widthSrc, INT heightSrc, const void *bits,
 391                                    BITMAPINFO *info, UINT coloruse, DWORD rop ) DECLSPEC_HIDDEN;
 392 extern BOOL nulldrv_StrokeAndFillPath( PHYSDEV dev ) DECLSPEC_HIDDEN;
 393 extern BOOL nulldrv_StrokePath( PHYSDEV dev ) DECLSPEC_HIDDEN;
 394 extern BOOL nulldrv_WidenPath( PHYSDEV dev ) DECLSPEC_HIDDEN;
 395
 396 static inline DC *get_nulldrv_dc( PHYSDEV dev )
 397 {
 398     return CONTAINING_RECORD( dev, DC, nulldrv );
 399 }
 400
 401 /* Undocumented value for DIB's iUsage: Indicates a mono DIB w/o pal entries */
 402 #define DIB_PAL_MONO 2
 403
 404 BOOL WINAPI FontIsLinked(HDC);
 405
 406 BOOL WINAPI SetVirtualResolution(HDC hdc, DWORD horz_res, DWORD vert_res, DWORD horz_size, DWORD vert_size);
 407
 408 static inline BOOL is_rect_empty( const RECT *rect )
 409 {
 410     return (rect->left >= rect->right || rect->top >= rect->bottom);
 411 }
 412
 413 static inline BOOL intersect_rect( RECT *dst, const RECT *src1, const RECT *src2 )
 414 {
 415     dst->left   = max( src1->left, src2->left );
 416     dst->top    = max( src1->top, src2->top );
 417     dst->right  = min( src1->right, src2->right );
 418     dst->bottom = min( src1->bottom, src2->bottom );
 419     return !is_rect_empty( dst );
 420 }
 421
 422 static inline void offset_rect( RECT *rect, int offset_x, int offset_y )
 423 {
 424     rect->left   += offset_x;
 425     rect->top    += offset_y;
 426     rect->right  += offset_x;
 427     rect->bottom += offset_y;
 428 }
 429
 430 static inline BOOL pt_in_rect( const RECT *rect, POINT pt )
 431 {
 432     return ((pt.x >= rect->left) && (pt.x < rect->right) &&
 433             (pt.y >= rect->top) && (pt.y < rect->bottom));
 434 }
 435
 436 static inline void get_bounding_rect( RECT *rect, int x, int y, int width, int height )
 437 {
 438     rect->left   = x;
 439     rect->right  = x + width;
 440     rect->top    = y;
 441     rect->bottom = y + height;
 442     if (rect->left > rect->right)
 443     {
 444         int tmp = rect->left;
 445         rect->left = rect->right + 1;
 446         rect->right = tmp + 1;
 447     }
 448     if (rect->top > rect->bottom)
 449     {
 450         int tmp = rect->top;
 451         rect->top = rect->bottom + 1;
 452         rect->bottom = tmp + 1;
 453     }
 454 }
 455
 456 static inline int get_bitmap_stride( int width, int bpp )
 457 {
 458     return ((width * bpp + 15) >> 3) & ~1;
 459 }
 460
 461 static inline int get_dib_stride( int width, int bpp )
 462 {
 463     return ((width * bpp + 31) >> 3) & ~3;
 464 }
 465
 466 static inline int get_dib_image_size( const BITMAPINFO *info )
 467 {
 468     return get_dib_stride( info->bmiHeader.biWidth, info->bmiHeader.biBitCount )
 469         * abs( info->bmiHeader.biHeight );
 470 }
 471
 472 static inline int get_dib_num_of_colors( const BITMAPINFO *info )
 473 {
 474     if (info->bmiHeader.biClrUsed) return min( info->bmiHeader.biClrUsed, 256 );
 475     return info->bmiHeader.biBitCount > 8 ? 0 : 1 << info->bmiHeader.biBitCount;
 476 }
 477
 478 static inline void copy_bitmapinfo( BITMAPINFO *dst, const BITMAPINFO *src )
 479 {
 480     unsigned int size = FIELD_OFFSET( BITMAPINFO, bmiColors[get_dib_num_of_colors( src )] );
 481     if (src->bmiHeader.biCompression == BI_BITFIELDS) size += 3 * sizeof(DWORD);
 482     memcpy( dst, src, size );
 483 }
 484
 485 static inline const struct gdi_dc_funcs *get_bitmap_funcs( const BITMAPOBJ *bitmap )
 486 {
 487     if( bitmap->dib ) return &dib_driver;
 488     return bitmap->funcs;
 489 }
 490
 491 extern void free_heap_bits( struct gdi_image_bits *bits ) DECLSPEC_HIDDEN;
 492
 493 extern HMODULE gdi32_module DECLSPEC_HIDDEN;
 494
 495 #endif /* __WINE_GDI_PRIVATE_H */