graphics/painting.c

   1 /*
   2  * GDI drawing functions.
   3  *
   4  * Copyright 1993, 1994 Alexandre Julliard
   5  * Copyright 1997 Bertho A. Stultiens
   6  *           1999 Huw D M Davies
   7  */
   8
   9 #include <string.h>
  10 #include "dc.h"
  11 #include "bitmap.h"
  12 #include "heap.h"
  13 #include "monitor.h"
  14 #include "cache.h"
  15 #include "region.h"
  16 #include "path.h"
  17 #include "debugtools.h"
  18 #include "winerror.h"
  19 #include "windef.h"
  20 #include "wingdi.h"
  21 #include "winuser.h"
  22 #include "wine/winuser16.h"
  23
  24 DEFAULT_DEBUG_CHANNEL(gdi)
  25
  26
  27 /***********************************************************************
  28  *           LineTo16    (GDI.19)
  29  */
  30 BOOL16 WINAPI LineTo16( HDC16 hdc, INT16 x, INT16 y )
  31 {
  32     return LineTo( hdc, x, y );
  33 }
  34
  35
  36 /***********************************************************************
  37  *           LineTo    (GDI32.249)
  38  */
  39 BOOL WINAPI LineTo( HDC hdc, INT x, INT y )
  40 {
  41     DC * dc = DC_GetDCPtr( hdc );
  42     BOOL ret;
  43
  44     if(!dc) return FALSE;
  45
  46     if(PATH_IsPathOpen(dc->w.path))
  47         ret = PATH_LineTo(hdc, x, y);
  48     else
  49         ret = dc->funcs->pLineTo && dc->funcs->pLineTo(dc,x,y);
  50     if(ret) {
  51         dc->w.CursPosX = x;
  52         dc->w.CursPosY = y;
  53     }
  54     return ret;
  55 }
  56
  57
  58 /***********************************************************************
  59  *           MoveTo16    (GDI.20)
  60  */
  61 DWORD WINAPI MoveTo16( HDC16 hdc, INT16 x, INT16 y )
  62 {
  63     POINT16     pt;
  64
  65     if (!MoveToEx16(hdc,x,y,&pt))
  66         return 0;
  67     return MAKELONG(pt.x,pt.y);
  68 }
  69
  70
  71 /***********************************************************************
  72  *           MoveToEx16    (GDI.483)
  73  */
  74 BOOL16 WINAPI MoveToEx16( HDC16 hdc, INT16 x, INT16 y, LPPOINT16 pt )
  75 {
  76     POINT pt32;
  77
  78     if (!MoveToEx( (HDC)hdc, (INT)x, (INT)y, &pt32 )) return FALSE;
  79     if (pt) CONV_POINT32TO16( &pt32, pt );
  80     return TRUE;
  81
  82 }
  83
  84
  85 /***********************************************************************
  86  *           MoveToEx    (GDI32.254)
  87  */
  88 BOOL WINAPI MoveToEx( HDC hdc, INT x, INT y, LPPOINT pt )
  89 {
  90     DC * dc = DC_GetDCPtr( hdc );
  91
  92     if(!dc) return FALSE;
  93
  94     if(pt) {
  95         pt->x = dc->w.CursPosX;
  96         pt->y = dc->w.CursPosY;
  97     }
  98     dc->w.CursPosX = x;
  99     dc->w.CursPosY = y;
 100
 101     if(PATH_IsPathOpen(dc->w.path))
 102         return PATH_MoveTo(hdc);
 103
 104     if(dc->funcs->pMoveToEx)
 105         return dc->funcs->pMoveToEx(dc,x,y,pt);
 106     return TRUE;
 107 }
 108
 109
 110 /***********************************************************************
 111  *           Arc16    (GDI.23)
 112  */
 113 BOOL16 WINAPI Arc16( HDC16 hdc, INT16 left, INT16 top, INT16 right,
 114                      INT16 bottom, INT16 xstart, INT16 ystart,
 115                      INT16 xend, INT16 yend )
 116 {
 117     return Arc( (HDC)hdc, (INT)left, (INT)top, (INT)right,
 118                   (INT)bottom, (INT)xstart, (INT)ystart, (INT)xend,
 119                   (INT)yend );
 120 }
 121
 122
 123 /***********************************************************************
 124  *           Arc    (GDI32.7)
 125  */
 126 BOOL WINAPI Arc( HDC hdc, INT left, INT top, INT right,
 127                      INT bottom, INT xstart, INT ystart,
 128                      INT xend, INT yend )
 129 {
 130     DC * dc = DC_GetDCPtr( hdc );
 131     if(!dc) return FALSE;
 132
 133     if(PATH_IsPathOpen(dc->w.path))
 134         return PATH_Arc(hdc, left, top, right, bottom, xstart, ystart, xend,
 135            yend);
 136
 137     return dc->funcs->pArc &&
 138            dc->funcs->pArc(dc,left,top,right,bottom,xstart,ystart,xend,yend);
 139 }
 140
 141 /***********************************************************************
 142  *           ArcTo    (GDI32.8)
 143  */
 144 BOOL WINAPI ArcTo( HDC hdc,
 145                      INT left,   INT top,
 146                      INT right,  INT bottom,
 147                      INT xstart, INT ystart,
 148                      INT xend,   INT yend )
 149 {
 150     BOOL result;
 151     DC * dc = DC_GetDCPtr( hdc );
 152     if(!dc) return FALSE;
 153
 154     if(dc->funcs->pArcTo)
 155         return dc->funcs->pArcTo( dc, left, top, right, bottom,
 156                                   xstart, ystart, xend, yend );
 157     /*
 158      * Else emulate it.
 159      * According to the documentation, a line is drawn from the current
 160      * position to the starting point of the arc.
 161      */
 162     LineTo(hdc, xstart, ystart);
 163
 164     /*
 165      * Then the arc is drawn.
 166      */
 167     result = Arc(hdc,
 168                   left, top,
 169                   right, bottom,
 170                   xstart, ystart,
 171                   xend, yend);
 172
 173     /*
 174      * If no error occured, the current position is moved to the ending
 175      * point of the arc.
 176      */
 177     if (result)
 178     {
 179         MoveToEx(hdc, xend, yend, NULL);
 180     }
 181
 182     return result;
 183 }
 184
 185 /***********************************************************************
 186  *           Pie16    (GDI.26)
 187  */
 188 BOOL16 WINAPI Pie16( HDC16 hdc, INT16 left, INT16 top,
 189                      INT16 right, INT16 bottom, INT16 xstart, INT16 ystart,
 190                      INT16 xend, INT16 yend )
 191 {
 192     return Pie( (HDC)hdc, (INT)left, (INT)top, (INT)right,
 193                   (INT)bottom, (INT)xstart, (INT)ystart, (INT)xend,
 194                   (INT)yend );
 195 }
 196
 197
 198 /***********************************************************************
 199  *           Pie   (GDI32.262)
 200  */
 201 BOOL WINAPI Pie( HDC hdc, INT left, INT top,
 202                      INT right, INT bottom, INT xstart, INT ystart,
 203                      INT xend, INT yend )
 204 {
 205     DC * dc = DC_GetDCPtr( hdc );
 206     if(!dc) return FALSE;
 207
 208     if(PATH_IsPathOpen(dc->w.path)) {
 209         FIXME("-> Path: stub\n");
 210         return FALSE;
 211     }
 212
 213     return dc->funcs->pPie &&
 214            dc->funcs->pPie(dc,left,top,right,bottom,xstart,ystart,xend,yend);
 215 }
 216
 217
 218 /***********************************************************************
 219  *           Chord16    (GDI.348)
 220  */
 221 BOOL16 WINAPI Chord16( HDC16 hdc, INT16 left, INT16 top,
 222                        INT16 right, INT16 bottom, INT16 xstart, INT16 ystart,
 223                        INT16 xend, INT16 yend )
 224 {
 225     return Chord( hdc, left, top, right, bottom, xstart, ystart, xend, yend );
 226 }
 227
 228
 229 /***********************************************************************
 230  *           Chord    (GDI32.14)
 231  */
 232 BOOL WINAPI Chord( HDC hdc, INT left, INT top,
 233                        INT right, INT bottom, INT xstart, INT ystart,
 234                        INT xend, INT yend )
 235 {
 236     DC * dc = DC_GetDCPtr( hdc );
 237     if(!dc) return FALSE;
 238
 239     if(PATH_IsPathOpen(dc->w.path)) {
 240         FIXME("-> Path: stub\n");
 241         return FALSE;
 242     }
 243
 244     return dc->funcs->pChord &&
 245            dc->funcs->pChord(dc,left,top,right,bottom,xstart,ystart,xend,yend);
 246 }
 247
 248
 249 /***********************************************************************
 250  *           Ellipse16    (GDI.24)
 251  */
 252 BOOL16 WINAPI Ellipse16( HDC16 hdc, INT16 left, INT16 top,
 253                          INT16 right, INT16 bottom )
 254 {
 255     return Ellipse( hdc, left, top, right, bottom );
 256 }
 257
 258
 259 /***********************************************************************
 260  *           Ellipse    (GDI32.75)
 261  */
 262 BOOL WINAPI Ellipse( HDC hdc, INT left, INT top,
 263                          INT right, INT bottom )
 264 {
 265     DC * dc = DC_GetDCPtr( hdc );
 266     if(!dc) return FALSE;
 267
 268     if(PATH_IsPathOpen(dc->w.path)) {
 269         FIXME("-> Path: stub\n");
 270         return FALSE;
 271     }
 272
 273     return dc->funcs->pEllipse &&
 274            dc->funcs->pEllipse(dc,left,top,right,bottom);
 275 }
 276
 277
 278 /***********************************************************************
 279  *           Rectangle16    (GDI.27)
 280  */
 281 BOOL16 WINAPI Rectangle16( HDC16 hdc, INT16 left, INT16 top,
 282                            INT16 right, INT16 bottom )
 283 {
 284     return Rectangle( hdc, left, top, right, bottom );
 285 }
 286
 287
 288 /***********************************************************************
 289  *           Rectangle    (GDI32.283)
 290  */
 291 BOOL WINAPI Rectangle( HDC hdc, INT left, INT top,
 292                            INT right, INT bottom )
 293 {
 294     DC * dc = DC_GetDCPtr( hdc );
 295     if(!dc) return FALSE;
 296
 297     if(PATH_IsPathOpen(dc->w.path))
 298         return PATH_Rectangle(hdc, left, top, right, bottom);
 299
 300     return dc->funcs->pRectangle &&
 301            dc->funcs->pRectangle(dc,left,top,right,bottom);
 302 }
 303
 304
 305 /***********************************************************************
 306  *           RoundRect16    (GDI.28)
 307  */
 308 BOOL16 WINAPI RoundRect16( HDC16 hdc, INT16 left, INT16 top, INT16 right,
 309                            INT16 bottom, INT16 ell_width, INT16 ell_height )
 310 {
 311     return RoundRect( hdc, left, top, right, bottom, ell_width, ell_height );
 312 }
 313
 314
 315 /***********************************************************************
 316  *           RoundRect    (GDI32.291)
 317  */
 318 BOOL WINAPI RoundRect( HDC hdc, INT left, INT top, INT right,
 319                            INT bottom, INT ell_width, INT ell_height )
 320 {
 321     DC * dc = DC_GetDCPtr( hdc );
 322     if(!dc) return FALSE;
 323
 324     if(PATH_IsPathOpen(dc->w.path)) {
 325         FIXME("-> Path: stub\n");
 326         return FALSE;
 327     }
 328
 329     return dc->funcs->pRoundRect &&
 330       dc->funcs->pRoundRect(dc,left,top,right,bottom,ell_width,ell_height);
 331 }
 332
 333 /***********************************************************************
 334  *           SetPixel16    (GDI.31)
 335  */
 336 COLORREF WINAPI SetPixel16( HDC16 hdc, INT16 x, INT16 y, COLORREF color )
 337 {
 338     return SetPixel( hdc, x, y, color );
 339 }
 340
 341
 342 /***********************************************************************
 343  *           SetPixel    (GDI32.327)
 344  */
 345 COLORREF WINAPI SetPixel( HDC hdc, INT x, INT y, COLORREF color )
 346 {
 347     DC * dc = DC_GetDCPtr( hdc );
 348
 349     if (!dc || !dc->funcs->pSetPixel) return 0;
 350     return dc->funcs->pSetPixel(dc,x,y,color);
 351 }
 352
 353 /***********************************************************************
 354  *           SetPixelV    (GDI32.329)
 355  */
 356 BOOL WINAPI SetPixelV( HDC hdc, INT x, INT y, COLORREF color )
 357 {
 358     DC * dc = DC_GetDCPtr( hdc );
 359
 360     if (!dc || !dc->funcs->pSetPixel) return FALSE;
 361     dc->funcs->pSetPixel(dc,x,y,color);
 362     return TRUE;
 363 }
 364
 365 /***********************************************************************
 366  *           GetPixel16    (GDI.83)
 367  */
 368 COLORREF WINAPI GetPixel16( HDC16 hdc, INT16 x, INT16 y )
 369 {
 370     return GetPixel( hdc, x, y );
 371 }
 372
 373
 374 /***********************************************************************
 375  *           GetPixel    (GDI32.211)
 376  */
 377 COLORREF WINAPI GetPixel( HDC hdc, INT x, INT y )
 378 {
 379     DC * dc = DC_GetDCPtr( hdc );
 380
 381     if (!dc) return 0;
 382 #ifdef SOLITAIRE_SPEED_HACK
 383     return 0;
 384 #endif
 385
 386     /* FIXME: should this be in the graphics driver? */
 387     if (!PtVisible( hdc, x, y )) return 0;
 388     if (!dc || !dc->funcs->pGetPixel) return 0;
 389     return dc->funcs->pGetPixel(dc,x,y);
 390 }
 391
 392
 393 /******************************************************************************
 394  * ChoosePixelFormat [GDI32.13]
 395  * Matches a pixel format to given format
 396  *
 397  * PARAMS
 398  *    hdc  [I] Device context to search for best pixel match
 399  *    ppfd [I] Pixel format for which a match is sought
 400  *
 401  * RETURNS
 402  *    Success: Pixel format index closest to given format
 403  *    Failure: 0
 404  */
 405 INT WINAPI ChoosePixelFormat( HDC hdc, const LPPIXELFORMATDESCRIPTOR ppfd )
 406 {
 407   DC * dc = DC_GetDCPtr( hdc );
 408
 409   TRACE("(%08x,%p)\n",hdc,ppfd);
 410
 411   if (dc == NULL) return 0;
 412   if (dc->funcs->pChoosePixelFormat == NULL) {
 413     FIXME(" :stub\n");
 414     return 0;
 415   }
 416
 417   return dc->funcs->pChoosePixelFormat(dc,ppfd);
 418 }
 419
 420
 421 /******************************************************************************
 422  * SetPixelFormat [GDI32.328]
 423  * Sets pixel format of device context
 424  *
 425  * PARAMS
 426  *    hdc          [I] Device context to search for best pixel match
 427  *    iPixelFormat [I] Pixel format index
 428  *    ppfd         [I] Pixel format for which a match is sought
 429  *
 430  * RETURNS STD
 431  */
 432 BOOL WINAPI SetPixelFormat( HDC hdc, INT iPixelFormat,
 433                             const PIXELFORMATDESCRIPTOR *ppfd)
 434 {
 435   DC * dc = DC_GetDCPtr( hdc );
 436
 437   TRACE("(%d,%d,%p)\n",hdc,iPixelFormat,ppfd);
 438
 439   if (dc == NULL) return 0;
 440   if (dc->funcs->pSetPixelFormat == NULL) {
 441     FIXME(" :stub\n");
 442     return 0;
 443   }
 444   return dc->funcs->pSetPixelFormat(dc,iPixelFormat,ppfd);
 445 }
 446
 447
 448 /******************************************************************************
 449  * GetPixelFormat [GDI32.212]
 450  * Gets index of pixel format of DC
 451  *
 452  * PARAMETERS
 453  *    hdc [I] Device context whose pixel format index is sought
 454  *
 455  * RETURNS
 456  *    Success: Currently selected pixel format
 457  *    Failure: 0
 458  */
 459 INT WINAPI GetPixelFormat( HDC hdc )
 460 {
 461   DC * dc = DC_GetDCPtr( hdc );
 462
 463   TRACE("(%08x)\n",hdc);
 464
 465   if (dc == NULL) return 0;
 466   if (dc->funcs->pGetPixelFormat == NULL) {
 467     FIXME(" :stub\n");
 468     return 0;
 469   }
 470   return dc->funcs->pGetPixelFormat(dc);
 471 }
 472
 473
 474 /******************************************************************************
 475  * DescribePixelFormat [GDI32.71]
 476  * Gets info about pixel format from DC
 477  *
 478  * PARAMS
 479  *    hdc          [I] Device context
 480  *    iPixelFormat [I] Pixel format selector
 481  *    nBytes       [I] Size of buffer
 482  *    ppfd         [O] Pointer to structure to receive pixel format data
 483  *
 484  * RETURNS
 485  *    Success: Maximum pixel format index of the device context
 486  *    Failure: 0
 487  */
 488 INT WINAPI DescribePixelFormat( HDC hdc, INT iPixelFormat, UINT nBytes,
 489                                 LPPIXELFORMATDESCRIPTOR ppfd )
 490 {
 491   DC * dc = DC_GetDCPtr( hdc );
 492
 493   TRACE("(%08x,%d,%d,%p): stub\n",hdc,iPixelFormat,nBytes,ppfd);
 494
 495   if (dc == NULL) return 0;
 496   if (dc->funcs->pDescribePixelFormat == NULL) {
 497     FIXME(" :stub\n");
 498     ppfd->nSize = nBytes;
 499     ppfd->nVersion = 1;
 500     return 3;
 501   }
 502   return dc->funcs->pDescribePixelFormat(dc,iPixelFormat,nBytes,ppfd);
 503 }
 504
 505
 506 /******************************************************************************
 507  * SwapBuffers [GDI32.354]
 508  * Exchanges front and back buffers of window
 509  *
 510  * PARAMS
 511  *    hdc [I] Device context whose buffers get swapped
 512  *
 513  * RETURNS STD
 514  */
 515 BOOL WINAPI SwapBuffers( HDC hdc )
 516 {
 517   DC * dc = DC_GetDCPtr( hdc );
 518
 519   TRACE("(%08x)\n",hdc);
 520
 521   if (dc == NULL) return 0;
 522   if (dc->funcs->pSwapBuffers == NULL) {
 523     FIXME(" :stub\n");
 524     return TRUE;
 525   }
 526   return dc->funcs->pSwapBuffers(dc);
 527 }
 528
 529
 530 /***********************************************************************
 531  *           PaintRgn16    (GDI.43)
 532  */
 533 BOOL16 WINAPI PaintRgn16( HDC16 hdc, HRGN16 hrgn )
 534 {
 535     return PaintRgn( hdc, hrgn );
 536 }
 537
 538
 539 /***********************************************************************
 540  *           PaintRgn    (GDI32.259)
 541  */
 542 BOOL WINAPI PaintRgn( HDC hdc, HRGN hrgn )
 543 {
 544     DC * dc = DC_GetDCPtr( hdc );
 545
 546     return dc && dc->funcs->pPaintRgn &&
 547            dc->funcs->pPaintRgn(dc,hrgn);
 548 }
 549
 550
 551 /***********************************************************************
 552  *           FillRgn16    (GDI.40)
 553  */
 554 BOOL16 WINAPI FillRgn16( HDC16 hdc, HRGN16 hrgn, HBRUSH16 hbrush )
 555 {
 556     return FillRgn( hdc, hrgn, hbrush );
 557 }
 558
 559
 560 /***********************************************************************
 561  *           FillRgn    (GDI32.101)
 562  */
 563 BOOL WINAPI FillRgn( HDC hdc, HRGN hrgn, HBRUSH hbrush )
 564 {
 565     BOOL retval;
 566     HBRUSH prevBrush;
 567     DC * dc = DC_GetDCPtr( hdc );
 568
 569     if (!dc) return FALSE;
 570     if(dc->funcs->pFillRgn)
 571         return dc->funcs->pFillRgn(dc, hrgn, hbrush);
 572
 573     prevBrush = SelectObject( hdc, hbrush );
 574     if (!prevBrush) return FALSE;
 575     retval = PaintRgn( hdc, hrgn );
 576     SelectObject( hdc, prevBrush );
 577     return retval;
 578 }
 579
 580
 581 /***********************************************************************
 582  *           FrameRgn16     (GDI.41)
 583  */
 584 BOOL16 WINAPI FrameRgn16( HDC16 hdc, HRGN16 hrgn, HBRUSH16 hbrush,
 585                           INT16 nWidth, INT16 nHeight )
 586 {
 587     return FrameRgn( hdc, hrgn, hbrush, nWidth, nHeight );
 588 }
 589
 590
 591 /***********************************************************************
 592  *           FrameRgn     (GDI32.105)
 593  */
 594 BOOL WINAPI FrameRgn( HDC hdc, HRGN hrgn, HBRUSH hbrush,
 595                           INT nWidth, INT nHeight )
 596 {
 597     HRGN tmp;
 598     DC *dc = DC_GetDCPtr( hdc );
 599
 600     if(dc->funcs->pFrameRgn)
 601         return dc->funcs->pFrameRgn( dc, hrgn, hbrush, nWidth, nHeight );
 602
 603     tmp = CreateRectRgn( 0, 0, 0, 0 );
 604     if(!REGION_FrameRgn( tmp, hrgn, nWidth, nHeight )) return FALSE;
 605     FillRgn( hdc, tmp, hbrush );
 606     DeleteObject( tmp );
 607     return TRUE;
 608 }
 609
 610
 611 /***********************************************************************
 612  *           InvertRgn16    (GDI.42)
 613  */
 614 BOOL16 WINAPI InvertRgn16( HDC16 hdc, HRGN16 hrgn )
 615 {
 616     return InvertRgn( hdc, hrgn );
 617 }
 618
 619
 620 /***********************************************************************
 621  *           InvertRgn    (GDI32.246)
 622  */
 623 BOOL WINAPI InvertRgn( HDC hdc, HRGN hrgn )
 624 {
 625     HBRUSH prevBrush;
 626     INT prevROP;
 627     BOOL retval;
 628     DC *dc = DC_GetDCPtr( hdc );
 629
 630     if(dc->funcs->pInvertRgn)
 631         return dc->funcs->pInvertRgn( dc, hrgn );
 632
 633     prevBrush = SelectObject( hdc, GetStockObject(BLACK_BRUSH) );
 634     prevROP = SetROP2( hdc, R2_NOT );
 635     retval = PaintRgn( hdc, hrgn );
 636     SelectObject( hdc, prevBrush );
 637     SetROP2( hdc, prevROP );
 638     return retval;
 639 }
 640
 641 /**********************************************************************
 642  *          Polyline16  (GDI.37)
 643  */
 644 BOOL16 WINAPI Polyline16( HDC16 hdc, const POINT16* pt, INT16 count )
 645 {
 646     register int i;
 647     BOOL16 ret;
 648     LPPOINT pt32 = (LPPOINT)HeapAlloc( GetProcessHeap(), 0,
 649                                            count*sizeof(POINT) );
 650
 651     if (!pt32) return FALSE;
 652     for (i=count;i--;) CONV_POINT16TO32(&(pt[i]),&(pt32[i]));
 653     ret = Polyline(hdc,pt32,count);
 654     HeapFree( GetProcessHeap(), 0, pt32 );
 655     return ret;
 656 }
 657
 658
 659 /**********************************************************************
 660  *          Polyline   (GDI32.276)
 661  */
 662 BOOL WINAPI Polyline( HDC hdc, const POINT* pt, INT count )
 663 {
 664     DC * dc = DC_GetDCPtr( hdc );
 665     if(!dc) return FALSE;
 666
 667     if(PATH_IsPathOpen(dc->w.path))
 668         return PATH_Polyline(hdc, pt, count);
 669
 670     return dc->funcs->pPolyline &&
 671            dc->funcs->pPolyline(dc,pt,count);
 672 }
 673
 674 /**********************************************************************
 675  *          PolylineTo   (GDI32.277)
 676  */
 677 BOOL WINAPI PolylineTo( HDC hdc, const POINT* pt, DWORD cCount )
 678 {
 679     DC * dc = DC_GetDCPtr( hdc );
 680     BOOL ret;
 681
 682     if(!dc) return FALSE;
 683
 684     if(PATH_IsPathOpen(dc->w.path))
 685         ret = PATH_PolylineTo(hdc, pt, cCount);
 686
 687     else if(dc->funcs->pPolylineTo)
 688         ret = dc->funcs->pPolylineTo(dc, pt, cCount);
 689
 690     else { /* do it using Polyline */
 691         POINT *pts = HeapAlloc( GetProcessHeap(), 0,
 692                                 sizeof(POINT) * (cCount + 1) );
 693         if(!pts) return FALSE;
 694
 695         pts[0].x = dc->w.CursPosX;
 696         pts[0].y = dc->w.CursPosY;
 697         memcpy( pts + 1, pt, sizeof(POINT) * cCount );
 698         ret = Polyline( hdc, pts, cCount + 1 );
 699         HeapFree( GetProcessHeap(), 0, pts );
 700     }
 701     if(ret) {
 702         dc->w.CursPosX = pt[cCount-1].x;
 703         dc->w.CursPosY = pt[cCount-1].y;
 704     }
 705     return ret;
 706 }
 707
 708 /**********************************************************************
 709  *          Polygon16  (GDI.36)
 710  */
 711 BOOL16 WINAPI Polygon16( HDC16 hdc, const POINT16* pt, INT16 count )
 712 {
 713     register int i;
 714     BOOL ret;
 715     LPPOINT pt32 = (LPPOINT)HeapAlloc( GetProcessHeap(), 0,
 716                                            count*sizeof(POINT) );
 717
 718     if (!pt32) return FALSE;
 719     for (i=count;i--;) CONV_POINT16TO32(&(pt[i]),&(pt32[i]));
 720     ret = Polygon(hdc,pt32,count);
 721     HeapFree( GetProcessHeap(), 0, pt32 );
 722     return ret;
 723 }
 724
 725
 726 /**********************************************************************
 727  *          Polygon  (GDI32.275)
 728  */
 729 BOOL WINAPI Polygon( HDC hdc, const POINT* pt, INT count )
 730 {
 731     DC * dc = DC_GetDCPtr( hdc );
 732     if(!dc) return FALSE;
 733
 734     if(PATH_IsPathOpen(dc->w.path))
 735         return PATH_Polygon(hdc, pt, count);
 736
 737     return dc->funcs->pPolygon &&
 738            dc->funcs->pPolygon(dc,pt,count);
 739 }
 740
 741
 742 /**********************************************************************
 743  *          PolyPolygon16  (GDI.450)
 744  */
 745 BOOL16 WINAPI PolyPolygon16( HDC16 hdc, const POINT16* pt, const INT16* counts,
 746                              UINT16 polygons )
 747 {
 748     int         i,nrpts;
 749     LPPOINT     pt32;
 750     LPINT       counts32;
 751     BOOL16      ret;
 752
 753     nrpts=0;
 754     for (i=polygons;i--;)
 755         nrpts+=counts[i];
 756     pt32 = (LPPOINT)HeapAlloc( GetProcessHeap(), 0, sizeof(POINT)*nrpts);
 757     if(pt32 == NULL) return FALSE;
 758     for (i=nrpts;i--;)
 759         CONV_POINT16TO32(&(pt[i]),&(pt32[i]));
 760     counts32 = (LPINT)HeapAlloc( GetProcessHeap(), 0, polygons*sizeof(INT) );
 761     if(counts32 == NULL) {
 762         HeapFree( GetProcessHeap(), 0, pt32 );
 763         return FALSE;
 764     }
 765     for (i=polygons;i--;) counts32[i]=counts[i];
 766
 767     ret = PolyPolygon(hdc,pt32,counts32,polygons);
 768     HeapFree( GetProcessHeap(), 0, counts32 );
 769     HeapFree( GetProcessHeap(), 0, pt32 );
 770     return ret;
 771 }
 772
 773 /**********************************************************************
 774  *          PolyPolygon  (GDI.450)
 775  */
 776 BOOL WINAPI PolyPolygon( HDC hdc, const POINT* pt, const INT* counts,
 777                              UINT polygons )
 778 {
 779     DC * dc = DC_GetDCPtr( hdc );
 780     if(!dc) return FALSE;
 781
 782     if(PATH_IsPathOpen(dc->w.path))
 783         return PATH_PolyPolygon(hdc, pt, counts, polygons);
 784
 785     return dc->funcs->pPolyPolygon &&
 786            dc->funcs->pPolyPolygon(dc,pt,counts,polygons);
 787 }
 788
 789 /**********************************************************************
 790  *          PolyPolyline  (GDI32.272)
 791  */
 792 BOOL WINAPI PolyPolyline( HDC hdc, const POINT* pt, const DWORD* counts,
 793                             DWORD polylines )
 794 {
 795     DC * dc = DC_GetDCPtr( hdc );
 796     if(!dc) return FALSE;
 797
 798     if(PATH_IsPathOpen(dc->w.path))
 799         return PATH_PolyPolyline(hdc, pt, counts, polylines);
 800
 801     return dc->funcs->pPolyPolyline &&
 802            dc->funcs->pPolyPolyline(dc,pt,counts,polylines);
 803 }
 804
 805 /**********************************************************************
 806  *          ExtFloodFill16   (GDI.372)
 807  */
 808 BOOL16 WINAPI ExtFloodFill16( HDC16 hdc, INT16 x, INT16 y, COLORREF color,
 809                               UINT16 fillType )
 810 {
 811     return ExtFloodFill( hdc, x, y, color, fillType );
 812 }
 813
 814
 815 /**********************************************************************
 816  *          ExtFloodFill   (GDI32.96)
 817  */
 818 BOOL WINAPI ExtFloodFill( HDC hdc, INT x, INT y, COLORREF color,
 819                               UINT fillType )
 820 {
 821     DC *dc = DC_GetDCPtr( hdc );
 822
 823     return dc && dc->funcs->pExtFloodFill &&
 824            dc->funcs->pExtFloodFill(dc,x,y,color,fillType);
 825 }
 826
 827
 828 /**********************************************************************
 829  *          FloodFill16   (GDI.25)
 830  */
 831 BOOL16 WINAPI FloodFill16( HDC16 hdc, INT16 x, INT16 y, COLORREF color )
 832 {
 833     return ExtFloodFill( hdc, x, y, color, FLOODFILLBORDER );
 834 }
 835
 836
 837 /**********************************************************************
 838  *          FloodFill   (GDI32.104)
 839  */
 840 BOOL WINAPI FloodFill( HDC hdc, INT x, INT y, COLORREF color )
 841 {
 842     return ExtFloodFill( hdc, x, y, color, FLOODFILLBORDER );
 843 }
 844
 845
 846 /******************************************************************************
 847  * PolyBezier16 [GDI.502]
 848  */
 849 BOOL16 WINAPI PolyBezier16( HDC16 hDc, const POINT16* lppt, INT16 cPoints )
 850 {
 851     int i;
 852     BOOL16 ret;
 853     LPPOINT pt32 = (LPPOINT)HeapAlloc( GetProcessHeap(), 0,
 854                                            cPoints*sizeof(POINT) );
 855     if(!pt32) return FALSE;
 856     for (i=cPoints;i--;) CONV_POINT16TO32(&(lppt[i]),&(pt32[i]));
 857     ret= PolyBezier(hDc, pt32, cPoints);
 858     HeapFree( GetProcessHeap(), 0, pt32 );
 859     return ret;
 860 }
 861
 862 /******************************************************************************
 863  * PolyBezierTo16 [GDI.503]
 864  */
 865 BOOL16 WINAPI PolyBezierTo16( HDC16 hDc, const POINT16* lppt, INT16 cPoints )
 866 {
 867     int i;
 868     BOOL16 ret;
 869     LPPOINT pt32 = (LPPOINT)HeapAlloc( GetProcessHeap(), 0,
 870                                            cPoints*sizeof(POINT) );
 871     if(!pt32) return FALSE;
 872     for (i=cPoints;i--;) CONV_POINT16TO32(&(lppt[i]),&(pt32[i]));
 873     ret= PolyBezierTo(hDc, pt32, cPoints);
 874     HeapFree( GetProcessHeap(), 0, pt32 );
 875     return ret;
 876 }
 877
 878 /******************************************************************************
 879  * PolyBezier [GDI32.268]
 880  * Draws one or more Bezier curves
 881  *
 882  * PARAMS
 883  *    hDc     [I] Handle to device context
 884  *    lppt    [I] Pointer to endpoints and control points
 885  *    cPoints [I] Count of endpoints and control points
 886  *
 887  * RETURNS STD
 888  */
 889 BOOL WINAPI PolyBezier( HDC hdc, const POINT* lppt, DWORD cPoints )
 890 {
 891     DC * dc = DC_GetDCPtr( hdc );
 892     if(!dc) return FALSE;
 893
 894     if(PATH_IsPathOpen(dc->w.path))
 895         return PATH_PolyBezier(hdc, lppt, cPoints);
 896
 897     if(dc->funcs->pPolyBezier)
 898         return dc->funcs->pPolyBezier(dc, lppt, cPoints);
 899
 900     /* We'll convert it into line segments and draw them using Polyline */
 901     {
 902         POINT *Pts;
 903         INT nOut;
 904         BOOL ret;
 905
 906         Pts = GDI_Bezier( lppt, cPoints, &nOut );
 907         if(!Pts) return FALSE;
 908         TRACE("Pts = %p, no = %d\n", Pts, nOut);
 909         ret = Polyline( dc->hSelf, Pts, nOut );
 910         HeapFree( GetProcessHeap(), 0, Pts );
 911         return ret;
 912     }
 913 }
 914
 915 /******************************************************************************
 916  * PolyBezierTo [GDI32.269]
 917  * Draws one or more Bezier curves
 918  *
 919  * PARAMS
 920  *    hDc     [I] Handle to device context
 921  *    lppt    [I] Pointer to endpoints and control points
 922  *    cPoints [I] Count of endpoints and control points
 923  *
 924  * RETURNS STD
 925  */
 926 BOOL WINAPI PolyBezierTo( HDC hdc, const POINT* lppt, DWORD cPoints )
 927 {
 928     DC * dc = DC_GetDCPtr( hdc );
 929     BOOL ret;
 930
 931     if(!dc) return FALSE;
 932
 933     if(PATH_IsPathOpen(dc->w.path))
 934         ret = PATH_PolyBezierTo(hdc, lppt, cPoints);
 935     else if(dc->funcs->pPolyBezierTo)
 936         ret = dc->funcs->pPolyBezierTo(dc, lppt, cPoints);
 937     else { /* We'll do it using PolyBezier */
 938         POINT *pt;
 939         pt = HeapAlloc( GetProcessHeap(), 0, sizeof(POINT) * (cPoints + 1) );
 940         if(!pt) return FALSE;
 941         pt[0].x = dc->w.CursPosX;
 942         pt[0].y = dc->w.CursPosY;
 943         memcpy(pt + 1, lppt, sizeof(POINT) * cPoints);
 944         ret = PolyBezier(dc->hSelf, pt, cPoints+1);
 945         HeapFree( GetProcessHeap(), 0, pt );
 946     }
 947     if(ret) {
 948         dc->w.CursPosX = lppt[cPoints-1].x;
 949         dc->w.CursPosY = lppt[cPoints-1].y;
 950     }
 951     return ret;
 952 }
 953
 954 /***********************************************************************
 955  *      AngleArc (GDI32.5)
 956  *
 957  */
 958 BOOL WINAPI AngleArc(HDC hdc, INT x, INT y, DWORD dwRadius,
 959                        FLOAT eStartAngle, FLOAT eSweepAngle)
 960 {
 961         FIXME("AngleArc, stub\n");
 962         return 0;
 963 }
 964
 965 /***********************************************************************
 966  *      PolyDraw (GDI32.270)
 967  *
 968  */
 969 BOOL WINAPI PolyDraw(HDC hdc, const POINT *lppt, const BYTE *lpbTypes,
 970                        DWORD cCount)
 971 {
 972         FIXME("PolyDraw, stub\n");
 973         return 0;
 974 }
 975
 976 /******************************************************************
 977  *
 978  *   *Very* simple bezier drawing code,
 979  *
 980  *   It uses a recursive algorithm to divide the curve in a series
 981  *   of straight line segements. Not ideal but for me sufficient.
 982  *   If you are in need for something better look for some incremental
 983  *   algorithm.
 984  *
 985  *   7 July 1998 Rein Klazes
 986  */
 987
 988  /*
 989   * some macro definitions for bezier drawing
 990   *
 991   * to avoid trucation errors the coordinates are
 992   * shifted upwards. When used in drawing they are
 993   * shifted down again, including correct rounding
 994   * and avoiding floating point arithmatic
 995   * 4 bits should allow 27 bits coordinates which I saw
 996   * somewere in the win32 doc's
 997   *
 998   */
 999
1000 #define BEZIERSHIFTBITS 4
1001 #define BEZIERSHIFTUP(x)    ((x)<<BEZIERSHIFTBITS)
1002 #define BEZIERPIXEL        BEZIERSHIFTUP(1)
1003 #define BEZIERSHIFTDOWN(x)  (((x)+(1<<(BEZIERSHIFTBITS-1)))>>BEZIERSHIFTBITS)
1004 /* maximum depth of recursion */
1005 #define BEZIERMAXDEPTH  8
1006
1007 /* size of array to store points on */
1008 /* enough for one curve */
1009 #define BEZIER_INITBUFSIZE    (150)
1010
1011 /* calculate Bezier average, in this case the middle
1012  * correctly rounded...
1013  * */
1014
1015 #define BEZIERMIDDLE(Mid, P1, P2) \
1016     (Mid).x=((P1).x+(P2).x + 1)/2;\
1017     (Mid).y=((P1).y+(P2).y + 1)/2;
1018
1019 /**********************************************************
1020 * BezierCheck helper function to check
1021 * that recursion can be terminated
1022 *       Points[0] and Points[3] are begin and endpoint
1023 *       Points[1] and Points[2] are control points
1024 *       level is the recursion depth
1025 *       returns true if the recusion can be terminated
1026 */
1027 static BOOL BezierCheck( int level, POINT *Points)
1028 {
1029     INT dx, dy;
1030     dx=Points[3].x-Points[0].x;
1031     dy=Points[3].y-Points[0].y;
1032     if(abs(dy)<=abs(dx)){/* shallow line */
1033         /* check that control points are between begin and end */
1034         if(Points[1].x < Points[0].x){
1035             if(Points[1].x < Points[3].x)
1036                 return FALSE;
1037         }else
1038             if(Points[1].x > Points[3].x)
1039                 return FALSE;
1040         if(Points[2].x < Points[0].x){
1041             if(Points[2].x < Points[3].x)
1042                 return FALSE;
1043         }else
1044             if(Points[2].x > Points[3].x)
1045                 return FALSE;
1046         dx=BEZIERSHIFTDOWN(dx);
1047         if(!dx) return TRUE;
1048         if(abs(Points[1].y-Points[0].y-(dy/dx)*
1049                 BEZIERSHIFTDOWN(Points[1].x-Points[0].x)) > BEZIERPIXEL ||
1050            abs(Points[2].y-Points[0].y-(dy/dx)*
1051                    BEZIERSHIFTDOWN(Points[2].x-Points[0].x)) > BEZIERPIXEL )
1052             return FALSE;
1053         else
1054             return TRUE;
1055     }else{ /* steep line */
1056         /* check that control points are between begin and end */
1057         if(Points[1].y < Points[0].y){
1058             if(Points[1].y < Points[3].y)
1059                 return FALSE;
1060         }else
1061             if(Points[1].y > Points[3].y)
1062                 return FALSE;
1063         if(Points[2].y < Points[0].y){
1064             if(Points[2].y < Points[3].y)
1065                 return FALSE;
1066         }else
1067             if(Points[2].y > Points[3].y)
1068                 return FALSE;
1069         dy=BEZIERSHIFTDOWN(dy);
1070         if(!dy) return TRUE;
1071         if(abs(Points[1].x-Points[0].x-(dx/dy)*
1072                 BEZIERSHIFTDOWN(Points[1].y-Points[0].y)) > BEZIERPIXEL ||
1073            abs(Points[2].x-Points[0].x-(dx/dy)*
1074                    BEZIERSHIFTDOWN(Points[2].y-Points[0].y)) > BEZIERPIXEL )
1075             return FALSE;
1076         else
1077             return TRUE;
1078     }
1079 }
1080
1081 /* Helper for GDI_Bezier.
1082  * Just handles one Bezier, so Points should point to four POINTs
1083  */
1084 static void GDI_InternalBezier( POINT *Points, POINT **PtsOut, INT *dwOut,
1085                                 INT *nPtsOut, INT level )
1086 {
1087     if(*nPtsOut == *dwOut) {
1088         *dwOut *= 2;
1089         *PtsOut = HeapReAlloc( GetProcessHeap(), 0, *PtsOut,
1090                                *dwOut * sizeof(POINT) );
1091     }
1092
1093     if(!level || BezierCheck(level, Points)) {
1094         if(*nPtsOut == 0) {
1095             (*PtsOut)[0].x = BEZIERSHIFTDOWN(Points[0].x);
1096             (*PtsOut)[0].y = BEZIERSHIFTDOWN(Points[0].y);
1097             *nPtsOut = 1;
1098         }
1099         (*PtsOut)[*nPtsOut].x = BEZIERSHIFTDOWN(Points[3].x);
1100         (*PtsOut)[*nPtsOut].y = BEZIERSHIFTDOWN(Points[3].y);
1101         (*nPtsOut) ++;
1102     } else {
1103         POINT Points2[4]; /* for the second recursive call */
1104         Points2[3]=Points[3];
1105         BEZIERMIDDLE(Points2[2], Points[2], Points[3]);
1106         BEZIERMIDDLE(Points2[0], Points[1], Points[2]);
1107         BEZIERMIDDLE(Points2[1],Points2[0],Points2[2]);
1108
1109         BEZIERMIDDLE(Points[1], Points[0],  Points[1]);
1110         BEZIERMIDDLE(Points[2], Points[1], Points2[0]);
1111         BEZIERMIDDLE(Points[3], Points[2], Points2[1]);
1112
1113         Points2[0]=Points[3];
1114
1115         /* do the two halves */
1116         GDI_InternalBezier(Points, PtsOut, dwOut, nPtsOut, level-1);
1117         GDI_InternalBezier(Points2, PtsOut, dwOut, nPtsOut, level-1);
1118     }
1119 }
1120
1121
1122
1123 /***********************************************************************
1124  *           GDI_Bezier   [INTERNAL]
1125  *   Calculate line segments that approximate -what microsoft calls- a bezier
1126  *   curve.
1127  *   The routine recursively divides the curve in two parts until a straight
1128  *   line can be drawn
1129  *
1130  *  PARAMS
1131  *
1132  *  Points  [I] Ptr to count POINTs which are the end and control points
1133  *              of the set of Bezier curves to flatten.
1134  *  count   [I] Number of Points.  Must be 3n+1.
1135  *  nPtsOut [O] Will contain no of points that have been produced (i.e. no. of
1136  *              lines+1).
1137  *
1138  *  RETURNS
1139  *
1140  *  Ptr to an array of POINTs that contain the lines that approximinate the
1141  *  Beziers.  The array is allocated on the process heap and it is the caller's
1142  *  responsibility to HeapFree it. [this is not a particularly nice interface
1143  *  but since we can't know in advance how many points will generate, the
1144  *  alternative would be to call the function twice, once to determine the size
1145  *  and a second time to do the work - I decided this was too much of a pain].
1146  */
1147 POINT *GDI_Bezier( const POINT *Points, INT count, INT *nPtsOut )
1148 {
1149     POINT *out;
1150     INT Bezier, dwOut = BEZIER_INITBUFSIZE, i;
1151
1152     if((count - 1) % 3 != 0) {
1153         ERR("Invalid no. of points\n");
1154         return NULL;
1155     }
1156     *nPtsOut = 0;
1157     out = HeapAlloc( GetProcessHeap(), 0, dwOut * sizeof(POINT));
1158     for(Bezier = 0; Bezier < (count-1)/3; Bezier++) {
1159         POINT ptBuf[4];
1160         memcpy(ptBuf, Points + Bezier * 3, sizeof(POINT) * 4);
1161         for(i = 0; i < 4; i++) {
1162             ptBuf[i].x = BEZIERSHIFTUP(ptBuf[i].x);
1163             ptBuf[i].y = BEZIERSHIFTUP(ptBuf[i].y);
1164         }
1165         GDI_InternalBezier( ptBuf, &out, &dwOut, nPtsOut, BEZIERMAXDEPTH );
1166     }
1167     TRACE("Produced %d points\n", *nPtsOut);
1168     return out;
1169 }