reactos/subsystems/win32/win32k/objects/line.c

   1 /*
   2  *  ReactOS W32 Subsystem
   3  *  Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 ReactOS Team
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19
  20 #include <w32k.h>
  21
  22 #define NDEBUG
  23 #include <debug.h>
  24
  25 // Some code from the WINE project source (www.winehq.com)
  26
  27 // Should use Fx in Point
  28 //
  29 BOOL FASTCALL
  30 IntGdiMoveToEx(DC      *dc,
  31                int     X,
  32                int     Y,
  33                LPPOINT Point)
  34 {
  35     BOOL  PathIsOpen;
  36     PDC_ATTR Dc_Attr = dc->pDc_Attr;
  37     if (!Dc_Attr) Dc_Attr = &dc->Dc_Attr;
  38     if ( Point )
  39     {
  40         if ( Dc_Attr->ulDirty_ & DIRTY_PTLCURRENT ) // Double hit!
  41         {
  42             Point->x = Dc_Attr->ptfxCurrent.x; // ret prev before change.
  43             Point->y = Dc_Attr->ptfxCurrent.y;
  44             IntDPtoLP ( dc, Point, 1);         // reconvert back.
  45         }
  46         else
  47         {
  48             Point->x = Dc_Attr->ptlCurrent.x;
  49             Point->y = Dc_Attr->ptlCurrent.y;
  50         }
  51     }
  52     Dc_Attr->ptlCurrent.x = X;
  53     Dc_Attr->ptlCurrent.y = Y;
  54     Dc_Attr->ptfxCurrent = Dc_Attr->ptlCurrent;
  55     CoordLPtoDP(dc, &Dc_Attr->ptfxCurrent); // Update fx
  56     Dc_Attr->ulDirty_ &= ~(DIRTY_PTLCURRENT|DIRTY_PTFXCURRENT|DIRTY_STYLESTATE);
  57
  58     PathIsOpen = PATH_IsPathOpen(dc->w.path);
  59
  60     if ( PathIsOpen )
  61         return PATH_MoveTo ( dc );
  62
  63     return TRUE;
  64 }
  65
  66 // Should use Fx in pt
  67 //
  68 VOID FASTCALL
  69 IntGetCurrentPositionEx(PDC dc, LPPOINT pt)
  70 {
  71     PDC_ATTR Dc_Attr = dc->pDc_Attr;
  72     if (!Dc_Attr) Dc_Attr = &dc->Dc_Attr;
  73
  74     if ( pt )
  75     {
  76         if (Dc_Attr->ulDirty_ & DIRTY_PTFXCURRENT)
  77         {
  78             Dc_Attr->ptfxCurrent = Dc_Attr->ptlCurrent;
  79             CoordLPtoDP(dc, &Dc_Attr->ptfxCurrent); // Update fx
  80             Dc_Attr->ulDirty_ &= ~(DIRTY_PTFXCURRENT|DIRTY_STYLESTATE);
  81         }
  82         pt->x = Dc_Attr->ptlCurrent.x;
  83         pt->y = Dc_Attr->ptlCurrent.y;
  84     }
  85 }
  86
  87 BOOL FASTCALL
  88 IntGdiLineTo(DC  *dc,
  89              int XEnd,
  90              int YEnd)
  91 {
  92     BITMAPOBJ *BitmapObj;
  93     BOOL      Ret = TRUE;
  94     PGDIBRUSHOBJ PenBrushObj;
  95     GDIBRUSHINST PenBrushInst;
  96     RECTL     Bounds;
  97     POINT     Points[2];
  98     PDC_ATTR Dc_Attr = dc->pDc_Attr;
  99
 100     if (!Dc_Attr) Dc_Attr = &dc->Dc_Attr;
 101
 102     if (PATH_IsPathOpen(dc->w.path))
 103     {
 104         Ret = PATH_LineTo(dc, XEnd, YEnd);
 105         if (Ret)
 106         {
 107             // FIXME - PATH_LineTo should maybe do this...
 108             Dc_Attr->ptlCurrent.x = XEnd;
 109             Dc_Attr->ptlCurrent.y = YEnd;
 110             Dc_Attr->ptfxCurrent = Dc_Attr->ptlCurrent;
 111             CoordLPtoDP(dc, &Dc_Attr->ptfxCurrent); // Update fx
 112             Dc_Attr->ulDirty_ &= ~(DIRTY_PTLCURRENT|DIRTY_PTFXCURRENT|DIRTY_STYLESTATE);
 113         }
 114         return Ret;
 115     }
 116     else
 117     {
 118         BitmapObj = BITMAPOBJ_LockBitmap ( dc->w.hBitmap );
 119         if (NULL == BitmapObj)
 120         {
 121             SetLastWin32Error(ERROR_INVALID_HANDLE);
 122             return FALSE;
 123         }
 124
 125         Points[0].x = Dc_Attr->ptlCurrent.x;
 126         Points[0].y = Dc_Attr->ptlCurrent.y;
 127         Points[1].x = XEnd;
 128         Points[1].y = YEnd;
 129
 130         IntLPtoDP(dc, Points, 2);
 131
 132         /* The DCOrg is in device coordinates */
 133         Points[0].x += dc->ptlDCOrig.x;
 134         Points[0].y += dc->ptlDCOrig.y;
 135         Points[1].x += dc->ptlDCOrig.x;
 136         Points[1].y += dc->ptlDCOrig.y;
 137
 138         Bounds.left = min(Points[0].x, Points[1].x);
 139         Bounds.top = min(Points[0].y, Points[1].y);
 140         Bounds.right = max(Points[0].x, Points[1].x);
 141         Bounds.bottom = max(Points[0].y, Points[1].y);
 142
 143         /* get BRUSHOBJ from current pen. */
 144         PenBrushObj = PENOBJ_LockPen( Dc_Attr->hpen );
 145         if (!PenBrushObj)
 146         {
 147             /* default to BLACK_PEN */
 148             PenBrushObj = PENOBJ_LockPen(NtGdiGetStockObject(BLACK_PEN));
 149             ASSERT(PenBrushObj);
 150         }
 151
 152         if (!(PenBrushObj->flAttrs & GDIBRUSH_IS_NULL))
 153         {
 154             IntGdiInitBrushInstance(&PenBrushInst, PenBrushObj, dc->XlatePen);
 155             Ret = IntEngLineTo(&BitmapObj->SurfObj,
 156                                dc->CombinedClip,
 157                                &PenBrushInst.BrushObject,
 158                                Points[0].x, Points[0].y,
 159                                Points[1].x, Points[1].y,
 160                                &Bounds,
 161                                ROP2_TO_MIX(Dc_Attr->jROP2));
 162         }
 163
 164         BITMAPOBJ_UnlockBitmap ( BitmapObj );
 165         PENOBJ_UnlockPen( PenBrushObj );
 166     }
 167
 168     if (Ret)
 169     {
 170         Dc_Attr->ptlCurrent.x = XEnd;
 171         Dc_Attr->ptlCurrent.y = YEnd;
 172         Dc_Attr->ptfxCurrent = Dc_Attr->ptlCurrent;
 173         CoordLPtoDP(dc, &Dc_Attr->ptfxCurrent); // Update fx
 174         Dc_Attr->ulDirty_ &= ~(DIRTY_PTLCURRENT|DIRTY_PTFXCURRENT|DIRTY_STYLESTATE);
 175     }
 176
 177     return Ret;
 178 }
 179
 180 BOOL FASTCALL
 181 IntGdiPolyBezier(DC      *dc,
 182                  LPPOINT pt,
 183                  DWORD   Count)
 184 {
 185     BOOL ret = FALSE; // default to FAILURE
 186
 187     if ( PATH_IsPathOpen(dc->w.path) )
 188     {
 189         return PATH_PolyBezier ( dc, pt, Count );
 190     }
 191
 192     /* We'll convert it into line segments and draw them using Polyline */
 193     {
 194         POINT *Pts;
 195         INT nOut;
 196
 197         Pts = GDI_Bezier ( pt, Count, &nOut );
 198         if ( Pts )
 199         {
 200             ret = IntGdiPolyline(dc, Pts, nOut);
 201             ExFreePool(Pts);
 202         }
 203     }
 204
 205     return ret;
 206 }
 207
 208 BOOL FASTCALL
 209 IntGdiPolyBezierTo(DC      *dc,
 210                    LPPOINT pt,
 211                    DWORD  Count)
 212 {
 213     BOOL ret = FALSE; // default to failure
 214     PDC_ATTR Dc_Attr = dc->pDc_Attr;
 215
 216     if (!Dc_Attr) Dc_Attr = &dc->Dc_Attr;
 217     if ( PATH_IsPathOpen(dc->w.path) )
 218         ret = PATH_PolyBezierTo ( dc, pt, Count );
 219     else /* We'll do it using PolyBezier */
 220     {
 221         POINT *npt;
 222         npt = ExAllocatePoolWithTag(PagedPool,
 223                                     sizeof(POINT) * (Count + 1),
 224                                     TAG_BEZIER);
 225         if ( npt )
 226         {
 227             npt[0].x = Dc_Attr->ptlCurrent.x;
 228             npt[0].y = Dc_Attr->ptlCurrent.y;
 229             memcpy(npt + 1, pt, sizeof(POINT) * Count);
 230             ret = IntGdiPolyBezier(dc, npt, Count+1);
 231             ExFreePool(npt);
 232         }
 233     }
 234     if ( ret )
 235     {
 236         Dc_Attr->ptlCurrent.x = pt[Count-1].x;
 237         Dc_Attr->ptlCurrent.y = pt[Count-1].y;
 238         Dc_Attr->ptfxCurrent = Dc_Attr->ptlCurrent;
 239         CoordLPtoDP(dc, &Dc_Attr->ptfxCurrent); // Update fx
 240         Dc_Attr->ulDirty_ &= ~(DIRTY_PTLCURRENT|DIRTY_PTFXCURRENT|DIRTY_STYLESTATE);
 241     }
 242
 243     return ret;
 244 }
 245
 246 BOOL FASTCALL
 247 IntGdiPolyline(DC      *dc,
 248                LPPOINT pt,
 249                int     Count)
 250 {
 251     BITMAPOBJ *BitmapObj;
 252     GDIBRUSHOBJ *PenBrushObj;
 253     GDIBRUSHINST PenBrushInst;
 254     LPPOINT Points;
 255     BOOL Ret = TRUE;
 256     LONG i;
 257     PDC_ATTR Dc_Attr = dc->pDc_Attr;
 258
 259     if (!Dc_Attr) Dc_Attr = &dc->Dc_Attr;
 260     if (PATH_IsPathOpen(dc->w.path))
 261         return PATH_Polyline(dc, pt, Count);
 262
 263     /* Get BRUSHOBJ from current pen. */
 264     PenBrushObj = PENOBJ_LockPen(Dc_Attr->hpen);
 265     /* FIXME - PenBrushObj can be NULL! Don't assert here! */
 266     ASSERT(PenBrushObj);
 267
 268     if (!(PenBrushObj->flAttrs & GDIBRUSH_IS_NULL))
 269     {
 270         Points = EngAllocMem(0, Count * sizeof(POINT), TAG_COORD);
 271         if (Points != NULL)
 272         {
 273             BitmapObj = BITMAPOBJ_LockBitmap(dc->w.hBitmap);
 274             /* FIXME - BitmapObj can be NULL!!!!
 275                Don't assert but handle this case gracefully! */
 276             ASSERT(BitmapObj);
 277
 278             RtlCopyMemory(Points, pt, Count * sizeof(POINT));
 279             IntLPtoDP(dc, Points, Count);
 280
 281             /* Offset the array of point by the dc->w.DCOrg */
 282             for (i = 0; i < Count; i++)
 283             {
 284                 Points[i].x += dc->ptlDCOrig.x;
 285                 Points[i].y += dc->ptlDCOrig.y;
 286             }
 287
 288             IntGdiInitBrushInstance(&PenBrushInst, PenBrushObj, dc->XlatePen);
 289             Ret = IntEngPolyline(&BitmapObj->SurfObj,
 290                                  dc->CombinedClip,
 291                                  &PenBrushInst.BrushObject,
 292                                  Points,
 293                                  Count,
 294                                  ROP2_TO_MIX(Dc_Attr->jROP2));
 295
 296             BITMAPOBJ_UnlockBitmap(BitmapObj);
 297             EngFreeMem(Points);
 298         }
 299         else
 300         {
 301             Ret = FALSE;
 302         }
 303     }
 304
 305     PENOBJ_UnlockPen(PenBrushObj);
 306
 307     return Ret;
 308 }
 309
 310 BOOL FASTCALL
 311 IntGdiPolylineTo(DC      *dc,
 312                  LPPOINT pt,
 313                  DWORD   Count)
 314 {
 315     BOOL ret = FALSE; // default to failure
 316     PDC_ATTR Dc_Attr = dc->pDc_Attr;
 317
 318     if (!Dc_Attr) Dc_Attr = &dc->Dc_Attr;
 319     if (PATH_IsPathOpen(dc->w.path))
 320     {
 321         ret = PATH_PolylineTo(dc, pt, Count);
 322     }
 323     else /* do it using Polyline */
 324     {
 325         POINT *pts = ExAllocatePoolWithTag(PagedPool,
 326                                            sizeof(POINT) * (Count + 1),
 327                                            TAG_SHAPE);
 328         if ( pts )
 329         {
 330             pts[0].x = Dc_Attr->ptlCurrent.x;
 331             pts[0].y = Dc_Attr->ptlCurrent.y;
 332             memcpy( pts + 1, pt, sizeof(POINT) * Count);
 333             ret = IntGdiPolyline(dc, pts, Count + 1);
 334             ExFreePool(pts);
 335         }
 336     }
 337     if ( ret )
 338     {
 339         Dc_Attr->ptlCurrent.x = pt[Count-1].x;
 340         Dc_Attr->ptlCurrent.y = pt[Count-1].y;
 341         Dc_Attr->ptfxCurrent = Dc_Attr->ptlCurrent;
 342         CoordLPtoDP(dc, &Dc_Attr->ptfxCurrent); // Update fx
 343         Dc_Attr->ulDirty_ &= ~(DIRTY_PTLCURRENT|DIRTY_PTFXCURRENT|DIRTY_STYLESTATE);
 344     }
 345
 346     return ret;
 347 }
 348
 349
 350 BOOL FASTCALL
 351 IntGdiPolyPolyline(DC      *dc,
 352                    LPPOINT pt,
 353                    LPDWORD PolyPoints,
 354                    DWORD   Count)
 355 {
 356     int i;
 357     LPPOINT pts;
 358     LPDWORD pc;
 359     BOOL ret = FALSE; // default to failure
 360     pts = pt;
 361     pc = PolyPoints;
 362
 363     for (i = 0; i < Count; i++)
 364     {
 365         ret = IntGdiPolyline ( dc, pts, *pc );
 366         if (ret == FALSE)
 367         {
 368             return ret;
 369         }
 370         pts+=*pc++;
 371     }
 372
 373     return ret;
 374 }
 375
 376 /******************************************************************************/
 377
 378 BOOL
 379 STDCALL
 380 NtGdiLineTo(HDC  hDC,
 381             int  XEnd,
 382             int  YEnd)
 383 {
 384     DC *dc;
 385     BOOL Ret;
 386
 387     dc = DC_LockDc(hDC);
 388     if (!dc)
 389     {
 390         SetLastWin32Error(ERROR_INVALID_HANDLE);
 391         return FALSE;
 392     }
 393     if (dc->DC_Type == DC_TYPE_INFO)
 394     {
 395         DC_UnlockDc(dc);
 396         /* Yes, Windows really returns TRUE in this case */
 397         return TRUE;
 398     }
 399
 400     Ret = IntGdiLineTo(dc, XEnd, YEnd);
 401
 402     DC_UnlockDc(dc);
 403     return Ret;
 404 }
 405
 406 BOOL
 407 APIENTRY
 408 NtGdiPolyDraw(
 409     IN HDC hdc,
 410     IN LPPOINT lppt,
 411     IN LPBYTE lpbTypes,
 412     IN ULONG cCount)
 413 {
 414     PDC dc;
 415     BOOL result = FALSE;
 416     POINT lastmove;
 417     unsigned int i;
 418     PDC_ATTR Dc_Attr = NULL;
 419
 420     dc = DC_LockDc(hdc);
 421     if (!dc) return FALSE;
 422     Dc_Attr = dc->pDc_Attr;
 423     if (!Dc_Attr) Dc_Attr = &dc->Dc_Attr;
 424
 425     _SEH_TRY
 426     {
 427         ProbeArrayForRead(lppt, sizeof(POINT), cCount, sizeof(LONG));
 428         ProbeArrayForRead(lpbTypes, sizeof(BYTE), cCount, sizeof(BYTE));
 429
 430         /* check for each bezierto if there are two more points */
 431         for ( i = 0; i < cCount; i++ )
 432         {
 433             if ( lpbTypes[i] != PT_MOVETO &&
 434                  lpbTypes[i] & PT_BEZIERTO )
 435             {
 436                 if ( cCount < i+3 ) _SEH_LEAVE;
 437                 else i += 2;
 438             }
 439         }
 440
 441         /* if no moveto occurs, we will close the figure here */
 442         lastmove.x = Dc_Attr->ptlCurrent.x;
 443         lastmove.y = Dc_Attr->ptlCurrent.y;
 444
 445         /* now let's draw */
 446         for ( i = 0; i < cCount; i++ )
 447         {
 448             if ( lpbTypes[i] == PT_MOVETO )
 449             {
 450                 IntGdiMoveToEx( dc, lppt[i].x, lppt[i].y, NULL );
 451                 lastmove.x = Dc_Attr->ptlCurrent.x;
 452                 lastmove.y = Dc_Attr->ptlCurrent.y;
 453             }
 454             else if ( lpbTypes[i] & PT_LINETO )
 455                 IntGdiLineTo( dc, lppt[i].x, lppt[i].y );
 456             else if ( lpbTypes[i] & PT_BEZIERTO )
 457             {
 458                 POINT pts[4];
 459                 pts[0].x = Dc_Attr->ptlCurrent.x;
 460                 pts[0].y = Dc_Attr->ptlCurrent.y;
 461                 RtlCopyMemory(pts + 1, &lppt[i], sizeof(POINT) * 3);
 462                 IntGdiPolyBezier(dc, pts, 4);
 463                 i += 2;
 464             }
 465             else _SEH_LEAVE;
 466
 467             if ( lpbTypes[i] & PT_CLOSEFIGURE )
 468             {
 469                 if ( PATH_IsPathOpen(dc->w.path) )
 470                 {
 471                     IntGdiCloseFigure( dc );
 472                 }
 473                 else IntGdiLineTo( dc, lastmove.x, lastmove.y );
 474             }
 475         }
 476
 477         result = TRUE;
 478     }
 479     _SEH_HANDLE
 480     {
 481         SetLastNtError(_SEH_GetExceptionCode());
 482     }
 483     _SEH_END;
 484
 485     DC_UnlockDc(dc);
 486
 487     return result;
 488 }
 489
 490
 491 /* EOF */