dlls/gdi32/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  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  21  */
  22
  23 #include "config.h"
  24 #include "wine/port.h"
  25
  26 #include <stdarg.h>
  27 #include <string.h>
  28 #include <stdlib.h>
  29
  30 #include "windef.h"
  31 #include "winbase.h"
  32 #include "wingdi.h"
  33 #include "winerror.h"
  34 #include "gdi_private.h"
  35 #include "wine/debug.h"
  36
  37 WINE_DEFAULT_DEBUG_CHANNEL(gdi);
  38
  39
  40 /***********************************************************************
  41  *           null driver fallback implementations
  42  */
  43
  44 BOOL nulldrv_AngleArc( PHYSDEV dev, INT x, INT y, DWORD radius, FLOAT start, FLOAT sweep )
  45 {
  46     INT x1 = GDI_ROUND( x + cos( start * M_PI / 180 ) * radius );
  47     INT y1 = GDI_ROUND( y - sin( start * M_PI / 180 ) * radius );
  48     INT x2 = GDI_ROUND( x + cos( (start + sweep) * M_PI / 180) * radius );
  49     INT y2 = GDI_ROUND( y - sin( (start + sweep) * M_PI / 180) * radius );
  50     INT arcdir = SetArcDirection( dev->hdc, sweep >= 0 ? AD_COUNTERCLOCKWISE : AD_CLOCKWISE );
  51     BOOL ret = ArcTo( dev->hdc, x - radius, y - radius, x + radius, y + radius, x1, y1, x2, y2 );
  52     SetArcDirection( dev->hdc, arcdir );
  53     return ret;
  54 }
  55
  56 BOOL nulldrv_ArcTo( PHYSDEV dev, INT left, INT top, INT right, INT bottom,
  57                     INT xstart, INT ystart, INT xend, INT yend )
  58 {
  59     INT width = abs( right - left );
  60     INT height = abs( bottom - top );
  61     double xradius = width / 2.0;
  62     double yradius = height / 2.0;
  63     double xcenter = right > left ? left + xradius : right + xradius;
  64     double ycenter = bottom > top ? top + yradius : bottom + yradius;
  65     double angle;
  66
  67     if (!height || !width) return FALSE;
  68     /* draw a line from the current position to the starting point of the arc, then draw the arc */
  69     angle = atan2( (ystart - ycenter) / height, (xstart - xcenter) / width );
  70     LineTo( dev->hdc, GDI_ROUND( xcenter + cos(angle) * xradius ),
  71             GDI_ROUND( ycenter + sin(angle) * yradius ));
  72     return Arc( dev->hdc, left, top, right, bottom, xstart, ystart, xend, yend );
  73 }
  74
  75 BOOL nulldrv_FillRgn( PHYSDEV dev, HRGN rgn, HBRUSH brush )
  76 {
  77     BOOL ret = FALSE;
  78     HBRUSH prev;
  79
  80     if ((prev = SelectObject( dev->hdc, brush )))
  81     {
  82         ret = PaintRgn( dev->hdc, rgn );
  83         SelectObject( dev->hdc, prev );
  84     }
  85     return ret;
  86 }
  87
  88 BOOL nulldrv_FrameRgn( PHYSDEV dev, HRGN rgn, HBRUSH brush, INT width, INT height )
  89 {
  90     BOOL ret = FALSE;
  91     HRGN tmp = CreateRectRgn( 0, 0, 0, 0 );
  92
  93     if (tmp)
  94     {
  95         if (REGION_FrameRgn( tmp, rgn, width, height )) ret = FillRgn( dev->hdc, tmp, brush );
  96         DeleteObject( tmp );
  97     }
  98     return ret;
  99 }
 100
 101 BOOL nulldrv_InvertRgn( PHYSDEV dev, HRGN rgn )
 102 {
 103     HBRUSH prev_brush = SelectObject( dev->hdc, GetStockObject(BLACK_BRUSH) );
 104     INT prev_rop = SetROP2( dev->hdc, R2_NOT );
 105     BOOL ret = PaintRgn( dev->hdc, rgn );
 106     SelectObject( dev->hdc, prev_brush );
 107     SetROP2( dev->hdc, prev_rop );
 108     return ret;
 109 }
 110
 111 BOOL nulldrv_PolyBezier( PHYSDEV dev, const POINT *points, DWORD count )
 112 {
 113     BOOL ret = FALSE;
 114     POINT *pts;
 115     INT n;
 116
 117     if ((pts = GDI_Bezier( points, count, &n )))
 118     {
 119         ret = Polyline( dev->hdc, pts, n );
 120         HeapFree( GetProcessHeap(), 0, pts );
 121     }
 122     return ret;
 123 }
 124
 125 BOOL nulldrv_PolyBezierTo( PHYSDEV dev, const POINT *points, DWORD count )
 126 {
 127     BOOL ret = FALSE;
 128     POINT *pts = HeapAlloc( GetProcessHeap(), 0, sizeof(POINT) * (count + 1) );
 129
 130     if (pts)
 131     {
 132         GetCurrentPositionEx( dev->hdc, &pts[0] );
 133         memcpy( pts + 1, points, sizeof(POINT) * count );
 134         ret = PolyBezier( dev->hdc, pts, count + 1 );
 135         HeapFree( GetProcessHeap(), 0, pts );
 136     }
 137     return ret;
 138 }
 139
 140 BOOL nulldrv_PolyDraw( PHYSDEV dev, const POINT *points, const BYTE *types, DWORD count )
 141 {
 142     POINT *line_pts = NULL, *bzr_pts = NULL, bzr[4];
 143     INT i, num_pts, num_bzr_pts, space, size;
 144
 145     /* check for valid point types */
 146     for (i = 0; i < count; i++)
 147     {
 148         switch (types[i])
 149         {
 150         case PT_MOVETO:
 151         case PT_LINETO | PT_CLOSEFIGURE:
 152         case PT_LINETO:
 153             break;
 154         case PT_BEZIERTO:
 155             if((i + 2 < count) && (types[i + 1] == PT_BEZIERTO) &&
 156                ((types[i + 2] & ~PT_CLOSEFIGURE) == PT_BEZIERTO))
 157             {
 158                 i += 2;
 159                 break;
 160             }
 161         default:
 162             return FALSE;
 163         }
 164     }
 165
 166     space = count + 300;
 167     line_pts = HeapAlloc( GetProcessHeap(), 0, space * sizeof(POINT) );
 168     num_pts = 1;
 169
 170     GetCurrentPositionEx( dev->hdc, &line_pts[0] );
 171     for (i = 0; i < count; i++)
 172     {
 173         switch (types[i])
 174         {
 175         case PT_MOVETO:
 176             if (num_pts >= 2) Polyline( dev->hdc, line_pts, num_pts );
 177             num_pts = 0;
 178             line_pts[num_pts++] = points[i];
 179             break;
 180         case PT_LINETO:
 181         case (PT_LINETO | PT_CLOSEFIGURE):
 182             line_pts[num_pts++] = points[i];
 183             break;
 184         case PT_BEZIERTO:
 185             bzr[0].x = line_pts[num_pts - 1].x;
 186             bzr[0].y = line_pts[num_pts - 1].y;
 187             memcpy( &bzr[1], &points[i], 3 * sizeof(POINT) );
 188
 189             if ((bzr_pts = GDI_Bezier( bzr, 4, &num_bzr_pts )))
 190             {
 191                 size = num_pts + (count - i) + num_bzr_pts;
 192                 if (space < size)
 193                 {
 194                     space = size * 2;
 195                     line_pts = HeapReAlloc( GetProcessHeap(), 0, line_pts, space * sizeof(POINT) );
 196                 }
 197                 memcpy( &line_pts[num_pts], &bzr_pts[1], (num_bzr_pts - 1) * sizeof(POINT) );
 198                 num_pts += num_bzr_pts - 1;
 199                 HeapFree( GetProcessHeap(), 0, bzr_pts );
 200             }
 201             i += 2;
 202             break;
 203         }
 204         if (types[i] & PT_CLOSEFIGURE) line_pts[num_pts++] = line_pts[0];
 205     }
 206
 207     if (num_pts >= 2) Polyline( dev->hdc, line_pts, num_pts );
 208     MoveToEx( dev->hdc, line_pts[num_pts - 1].x, line_pts[num_pts - 1].y, NULL );
 209     HeapFree( GetProcessHeap(), 0, line_pts );
 210     return TRUE;
 211 }
 212
 213 BOOL nulldrv_PolylineTo( PHYSDEV dev, const POINT *points, INT count )
 214 {
 215     BOOL ret = FALSE;
 216     POINT *pts;
 217
 218     if (!count) return FALSE;
 219     if ((pts = HeapAlloc( GetProcessHeap(), 0, sizeof(POINT) * (count + 1) )))
 220     {
 221         GetCurrentPositionEx( dev->hdc, &pts[0] );
 222         memcpy( pts + 1, points, sizeof(POINT) * count );
 223         ret = Polyline( dev->hdc, pts, count + 1 );
 224         HeapFree( GetProcessHeap(), 0, pts );
 225     }
 226     return ret;
 227 }
 228
 229 /***********************************************************************
 230  *           LineTo    (GDI32.@)
 231  */
 232 BOOL WINAPI LineTo( HDC hdc, INT x, INT y )
 233 {
 234     DC * dc = get_dc_ptr( hdc );
 235     PHYSDEV physdev;
 236     BOOL ret;
 237
 238     if(!dc) return FALSE;
 239
 240     update_dc( dc );
 241     physdev = GET_DC_PHYSDEV( dc, pLineTo );
 242     ret = physdev->funcs->pLineTo( physdev, x, y );
 243
 244     if(ret) {
 245         dc->CursPosX = x;
 246         dc->CursPosY = y;
 247     }
 248     release_dc_ptr( dc );
 249     return ret;
 250 }
 251
 252
 253 /***********************************************************************
 254  *           MoveToEx    (GDI32.@)
 255  */
 256 BOOL WINAPI MoveToEx( HDC hdc, INT x, INT y, LPPOINT pt )
 257 {
 258     BOOL ret;
 259     PHYSDEV physdev;
 260     DC * dc = get_dc_ptr( hdc );
 261
 262     if(!dc) return FALSE;
 263
 264     if(pt) {
 265         pt->x = dc->CursPosX;
 266         pt->y = dc->CursPosY;
 267     }
 268     dc->CursPosX = x;
 269     dc->CursPosY = y;
 270
 271     physdev = GET_DC_PHYSDEV( dc, pMoveTo );
 272     ret = physdev->funcs->pMoveTo( physdev, x, y );
 273     release_dc_ptr( dc );
 274     return ret;
 275 }
 276
 277
 278 /***********************************************************************
 279  *           Arc    (GDI32.@)
 280  */
 281 BOOL WINAPI Arc( HDC hdc, INT left, INT top, INT right,
 282                      INT bottom, INT xstart, INT ystart,
 283                      INT xend, INT yend )
 284 {
 285     BOOL ret = FALSE;
 286     DC * dc = get_dc_ptr( hdc );
 287
 288     if (dc)
 289     {
 290         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pArc );
 291         update_dc( dc );
 292         ret = physdev->funcs->pArc( physdev, left, top, right, bottom, xstart, ystart, xend, yend );
 293         release_dc_ptr( dc );
 294     }
 295     return ret;
 296 }
 297
 298 /***********************************************************************
 299  *           ArcTo    (GDI32.@)
 300  */
 301 BOOL WINAPI ArcTo( HDC hdc,
 302                      INT left,   INT top,
 303                      INT right,  INT bottom,
 304                      INT xstart, INT ystart,
 305                      INT xend,   INT yend )
 306 {
 307     double width = fabs(right-left),
 308         height = fabs(bottom-top),
 309         xradius = width/2,
 310         yradius = height/2,
 311         xcenter = right > left ? left+xradius : right+xradius,
 312         ycenter = bottom > top ? top+yradius : bottom+yradius,
 313         angle;
 314     PHYSDEV physdev;
 315     BOOL result;
 316     DC * dc = get_dc_ptr( hdc );
 317     if(!dc) return FALSE;
 318
 319     update_dc( dc );
 320     physdev = GET_DC_PHYSDEV( dc, pArcTo );
 321     result = physdev->funcs->pArcTo( physdev, left, top, right, bottom, xstart, ystart, xend, yend );
 322
 323     if (result) {
 324         angle = atan2(((yend-ycenter)/height),
 325                       ((xend-xcenter)/width));
 326         dc->CursPosX = GDI_ROUND(xcenter+(cos(angle)*xradius));
 327         dc->CursPosY = GDI_ROUND(ycenter+(sin(angle)*yradius));
 328     }
 329     release_dc_ptr( dc );
 330     return result;
 331 }
 332
 333
 334 /***********************************************************************
 335  *           Pie   (GDI32.@)
 336  */
 337 BOOL WINAPI Pie( HDC hdc, INT left, INT top,
 338                      INT right, INT bottom, INT xstart, INT ystart,
 339                      INT xend, INT yend )
 340 {
 341     BOOL ret;
 342     PHYSDEV physdev;
 343     DC * dc = get_dc_ptr( hdc );
 344     if (!dc) return FALSE;
 345
 346     update_dc( dc );
 347     physdev = GET_DC_PHYSDEV( dc, pPie );
 348     ret = physdev->funcs->pPie( physdev, left, top, right, bottom, xstart, ystart, xend, yend );
 349     release_dc_ptr( dc );
 350     return ret;
 351 }
 352
 353
 354 /***********************************************************************
 355  *           Chord    (GDI32.@)
 356  */
 357 BOOL WINAPI Chord( HDC hdc, INT left, INT top,
 358                        INT right, INT bottom, INT xstart, INT ystart,
 359                        INT xend, INT yend )
 360 {
 361     BOOL ret;
 362     PHYSDEV physdev;
 363     DC * dc = get_dc_ptr( hdc );
 364     if (!dc) return FALSE;
 365
 366     update_dc( dc );
 367     physdev = GET_DC_PHYSDEV( dc, pChord );
 368     ret = physdev->funcs->pChord( physdev, left, top, right, bottom, xstart, ystart, xend, yend );
 369     release_dc_ptr( dc );
 370     return ret;
 371 }
 372
 373
 374 /***********************************************************************
 375  *           Ellipse    (GDI32.@)
 376  */
 377 BOOL WINAPI Ellipse( HDC hdc, INT left, INT top,
 378                          INT right, INT bottom )
 379 {
 380     BOOL ret;
 381     PHYSDEV physdev;
 382     DC * dc = get_dc_ptr( hdc );
 383     if (!dc) return FALSE;
 384
 385     update_dc( dc );
 386     physdev = GET_DC_PHYSDEV( dc, pEllipse );
 387     ret = physdev->funcs->pEllipse( physdev, left, top, right, bottom );
 388     release_dc_ptr( dc );
 389     return ret;
 390 }
 391
 392
 393 /***********************************************************************
 394  *           Rectangle    (GDI32.@)
 395  */
 396 BOOL WINAPI Rectangle( HDC hdc, INT left, INT top,
 397                            INT right, INT bottom )
 398 {
 399     BOOL ret = FALSE;
 400     DC * dc = get_dc_ptr( hdc );
 401
 402     if (dc)
 403     {
 404         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pRectangle );
 405         update_dc( dc );
 406         ret = physdev->funcs->pRectangle( physdev, left, top, right, bottom );
 407         release_dc_ptr( dc );
 408     }
 409     return ret;
 410 }
 411
 412
 413 /***********************************************************************
 414  *           RoundRect    (GDI32.@)
 415  */
 416 BOOL WINAPI RoundRect( HDC hdc, INT left, INT top, INT right,
 417                            INT bottom, INT ell_width, INT ell_height )
 418 {
 419     BOOL ret = FALSE;
 420     DC *dc = get_dc_ptr( hdc );
 421
 422     if (dc)
 423     {
 424         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pRoundRect );
 425         update_dc( dc );
 426         ret = physdev->funcs->pRoundRect( physdev, left, top, right, bottom, ell_width, ell_height );
 427         release_dc_ptr( dc );
 428     }
 429     return ret;
 430 }
 431
 432 /***********************************************************************
 433  *           SetPixel    (GDI32.@)
 434  */
 435 COLORREF WINAPI SetPixel( HDC hdc, INT x, INT y, COLORREF color )
 436 {
 437     COLORREF ret = 0;
 438     DC * dc = get_dc_ptr( hdc );
 439
 440     if (dc)
 441     {
 442         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetPixel );
 443         update_dc( dc );
 444         ret = physdev->funcs->pSetPixel( physdev, x, y, color );
 445         release_dc_ptr( dc );
 446     }
 447     return ret;
 448 }
 449
 450 /***********************************************************************
 451  *           SetPixelV    (GDI32.@)
 452  */
 453 BOOL WINAPI SetPixelV( HDC hdc, INT x, INT y, COLORREF color )
 454 {
 455     BOOL ret = FALSE;
 456     DC * dc = get_dc_ptr( hdc );
 457
 458     if (dc)
 459     {
 460         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetPixel );
 461         update_dc( dc );
 462         physdev->funcs->pSetPixel( physdev, x, y, color );
 463         ret = TRUE;
 464         release_dc_ptr( dc );
 465     }
 466     return ret;
 467 }
 468
 469 /***********************************************************************
 470  *           GetPixel    (GDI32.@)
 471  */
 472 COLORREF WINAPI GetPixel( HDC hdc, INT x, INT y )
 473 {
 474     COLORREF ret = CLR_INVALID;
 475     DC * dc = get_dc_ptr( hdc );
 476
 477     if (dc)
 478     {
 479         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pGetPixel );
 480         update_dc( dc );
 481         ret = physdev->funcs->pGetPixel( physdev, x, y );
 482         release_dc_ptr( dc );
 483     }
 484     return ret;
 485 }
 486
 487
 488 /******************************************************************************
 489  * GdiSetPixelFormat [GDI32.@]
 490  *
 491  * Probably not the correct semantics, it's supposed to be an internal backend for SetPixelFormat.
 492  */
 493 BOOL WINAPI GdiSetPixelFormat( HDC hdc, INT iPixelFormat, const PIXELFORMATDESCRIPTOR *ppfd)
 494 {
 495     INT bRet = FALSE;
 496     DC * dc = get_dc_ptr( hdc );
 497
 498     TRACE("(%p,%d,%p)\n",hdc,iPixelFormat,ppfd);
 499
 500     if (dc)
 501     {
 502         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetPixelFormat );
 503         update_dc( dc );
 504         bRet = physdev->funcs->pSetPixelFormat( physdev, iPixelFormat, ppfd );
 505         release_dc_ptr( dc );
 506     }
 507     return bRet;
 508 }
 509
 510
 511 /******************************************************************************
 512  * GetPixelFormat [GDI32.@]
 513  * Gets index of pixel format of DC
 514  *
 515  * PARAMETERS
 516  *    hdc [I] Device context whose pixel format index is sought
 517  *
 518  * RETURNS
 519  *    Success: Currently selected pixel format
 520  *    Failure: 0
 521  */
 522 INT WINAPI GetPixelFormat( HDC hdc )
 523 {
 524     INT ret = 0;
 525     DC * dc = get_dc_ptr( hdc );
 526
 527     TRACE("(%p)\n",hdc);
 528
 529     if (dc)
 530     {
 531         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pGetPixelFormat );
 532         update_dc( dc );
 533         ret = physdev->funcs->pGetPixelFormat( physdev );
 534         release_dc_ptr( dc );
 535     }
 536     return ret;
 537 }
 538
 539
 540 /******************************************************************************
 541  * GdiDescribePixelFormat [GDI32.@]
 542  *
 543  * Probably not the correct semantics, it's supposed to be an internal backend for DescribePixelFormat.
 544  */
 545 INT WINAPI GdiDescribePixelFormat( HDC hdc, INT iPixelFormat, UINT nBytes,
 546                                    LPPIXELFORMATDESCRIPTOR ppfd )
 547 {
 548     INT ret = 0;
 549     DC * dc = get_dc_ptr( hdc );
 550
 551     TRACE("(%p,%d,%d,%p): stub\n",hdc,iPixelFormat,nBytes,ppfd);
 552
 553     if (dc)
 554     {
 555         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pDescribePixelFormat );
 556         update_dc( dc );
 557         ret = physdev->funcs->pDescribePixelFormat( physdev, iPixelFormat, nBytes, ppfd );
 558         release_dc_ptr( dc );
 559     }
 560     return ret;
 561 }
 562
 563
 564 /******************************************************************************
 565  * GdiSwapBuffers [GDI32.@]
 566  *
 567  * Probably not the correct semantics, it's supposed to be an internal backend for SwapBuffers.
 568  */
 569 BOOL WINAPI GdiSwapBuffers( HDC hdc )
 570 {
 571     INT bRet = FALSE;
 572     DC * dc = get_dc_ptr( hdc );
 573
 574     TRACE("(%p)\n",hdc);
 575
 576     if (dc)
 577     {
 578         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSwapBuffers );
 579         update_dc( dc );
 580         bRet = physdev->funcs->pSwapBuffers( physdev );
 581         release_dc_ptr( dc );
 582     }
 583     return bRet;
 584 }
 585
 586
 587 /***********************************************************************
 588  *           PaintRgn    (GDI32.@)
 589  */
 590 BOOL WINAPI PaintRgn( HDC hdc, HRGN hrgn )
 591 {
 592     BOOL ret = FALSE;
 593     DC * dc = get_dc_ptr( hdc );
 594
 595     if (dc)
 596     {
 597         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pPaintRgn );
 598         update_dc( dc );
 599         ret = physdev->funcs->pPaintRgn( physdev, hrgn );
 600         release_dc_ptr( dc );
 601     }
 602     return ret;
 603 }
 604
 605
 606 /***********************************************************************
 607  *           FillRgn    (GDI32.@)
 608  */
 609 BOOL WINAPI FillRgn( HDC hdc, HRGN hrgn, HBRUSH hbrush )
 610 {
 611     BOOL retval = FALSE;
 612     DC * dc = get_dc_ptr( hdc );
 613
 614     if (dc)
 615     {
 616         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pFillRgn );
 617         update_dc( dc );
 618         retval = physdev->funcs->pFillRgn( physdev, hrgn, hbrush );
 619         release_dc_ptr( dc );
 620     }
 621     return retval;
 622 }
 623
 624
 625 /***********************************************************************
 626  *           FrameRgn     (GDI32.@)
 627  */
 628 BOOL WINAPI FrameRgn( HDC hdc, HRGN hrgn, HBRUSH hbrush,
 629                           INT nWidth, INT nHeight )
 630 {
 631     BOOL ret = FALSE;
 632     DC *dc = get_dc_ptr( hdc );
 633
 634     if (dc)
 635     {
 636         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pFrameRgn );
 637         update_dc( dc );
 638         ret = physdev->funcs->pFrameRgn( physdev, hrgn, hbrush, nWidth, nHeight );
 639         release_dc_ptr( dc );
 640     }
 641     return ret;
 642 }
 643
 644
 645 /***********************************************************************
 646  *           InvertRgn    (GDI32.@)
 647  */
 648 BOOL WINAPI InvertRgn( HDC hdc, HRGN hrgn )
 649 {
 650     BOOL ret = FALSE;
 651     DC *dc = get_dc_ptr( hdc );
 652
 653     if (dc)
 654     {
 655         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pInvertRgn );
 656         update_dc( dc );
 657         ret = physdev->funcs->pInvertRgn( physdev, hrgn );
 658         release_dc_ptr( dc );
 659     }
 660     return ret;
 661 }
 662
 663
 664 /**********************************************************************
 665  *          Polyline   (GDI32.@)
 666  */
 667 BOOL WINAPI Polyline( HDC hdc, const POINT* pt, INT count )
 668 {
 669     BOOL ret = FALSE;
 670     DC * dc = get_dc_ptr( hdc );
 671
 672     if (dc)
 673     {
 674         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pPolyline );
 675         update_dc( dc );
 676         ret = physdev->funcs->pPolyline( physdev, pt, count );
 677         release_dc_ptr( dc );
 678     }
 679     return ret;
 680 }
 681
 682 /**********************************************************************
 683  *          PolylineTo   (GDI32.@)
 684  */
 685 BOOL WINAPI PolylineTo( HDC hdc, const POINT* pt, DWORD cCount )
 686 {
 687     DC * dc = get_dc_ptr( hdc );
 688     PHYSDEV physdev;
 689     BOOL ret;
 690
 691     if(!dc) return FALSE;
 692
 693     update_dc( dc );
 694     physdev = GET_DC_PHYSDEV( dc, pPolylineTo );
 695     ret = physdev->funcs->pPolylineTo( physdev, pt, cCount );
 696
 697     if (ret && cCount)
 698     {
 699         dc->CursPosX = pt[cCount-1].x;
 700         dc->CursPosY = pt[cCount-1].y;
 701     }
 702     release_dc_ptr( dc );
 703     return ret;
 704 }
 705
 706
 707 /**********************************************************************
 708  *          Polygon  (GDI32.@)
 709  */
 710 BOOL WINAPI Polygon( HDC hdc, const POINT* pt, INT count )
 711 {
 712     BOOL ret = FALSE;
 713     DC * dc = get_dc_ptr( hdc );
 714
 715     if (dc)
 716     {
 717         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pPolygon );
 718         update_dc( dc );
 719         ret = physdev->funcs->pPolygon( physdev, pt, count );
 720         release_dc_ptr( dc );
 721     }
 722     return ret;
 723 }
 724
 725
 726 /**********************************************************************
 727  *          PolyPolygon  (GDI32.@)
 728  */
 729 BOOL WINAPI PolyPolygon( HDC hdc, const POINT* pt, const INT* counts,
 730                              UINT polygons )
 731 {
 732     BOOL ret = FALSE;
 733     DC * dc = get_dc_ptr( hdc );
 734
 735     if (dc)
 736     {
 737         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pPolyPolygon );
 738         update_dc( dc );
 739         ret = physdev->funcs->pPolyPolygon( physdev, pt, counts, polygons );
 740         release_dc_ptr( dc );
 741     }
 742     return ret;
 743 }
 744
 745 /**********************************************************************
 746  *          PolyPolyline  (GDI32.@)
 747  */
 748 BOOL WINAPI PolyPolyline( HDC hdc, const POINT* pt, const DWORD* counts,
 749                             DWORD polylines )
 750 {
 751     BOOL ret = FALSE;
 752     DC * dc = get_dc_ptr( hdc );
 753
 754     if (dc)
 755     {
 756         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pPolyPolyline );
 757         update_dc( dc );
 758         ret = physdev->funcs->pPolyPolyline( physdev, pt, counts, polylines );
 759         release_dc_ptr( dc );
 760     }
 761     return ret;
 762 }
 763
 764 /**********************************************************************
 765  *          ExtFloodFill   (GDI32.@)
 766  */
 767 BOOL WINAPI ExtFloodFill( HDC hdc, INT x, INT y, COLORREF color,
 768                               UINT fillType )
 769 {
 770     BOOL ret = FALSE;
 771     DC * dc = get_dc_ptr( hdc );
 772
 773     if (dc)
 774     {
 775         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pExtFloodFill );
 776
 777         update_dc( dc );
 778         ret = physdev->funcs->pExtFloodFill( physdev, x, y, color, fillType );
 779         release_dc_ptr( dc );
 780     }
 781     return ret;
 782 }
 783
 784
 785 /**********************************************************************
 786  *          FloodFill   (GDI32.@)
 787  */
 788 BOOL WINAPI FloodFill( HDC hdc, INT x, INT y, COLORREF color )
 789 {
 790     return ExtFloodFill( hdc, x, y, color, FLOODFILLBORDER );
 791 }
 792
 793
 794 /******************************************************************************
 795  * PolyBezier [GDI32.@]
 796  * Draws one or more Bezier curves
 797  *
 798  * PARAMS
 799  *    hDc     [I] Handle to device context
 800  *    lppt    [I] Pointer to endpoints and control points
 801  *    cPoints [I] Count of endpoints and control points
 802  *
 803  * RETURNS
 804  *    Success: TRUE
 805  *    Failure: FALSE
 806  */
 807 BOOL WINAPI PolyBezier( HDC hdc, const POINT* lppt, DWORD cPoints )
 808 {
 809     PHYSDEV physdev;
 810     BOOL ret;
 811     DC * dc;
 812
 813     /* cPoints must be 3 * n + 1 (where n>=1) */
 814     if (cPoints == 1 || (cPoints % 3) != 1) return FALSE;
 815
 816     dc = get_dc_ptr( hdc );
 817     if(!dc) return FALSE;
 818
 819     update_dc( dc );
 820     physdev = GET_DC_PHYSDEV( dc, pPolyBezier );
 821     ret = physdev->funcs->pPolyBezier( physdev, lppt, cPoints );
 822     release_dc_ptr( dc );
 823     return ret;
 824 }
 825
 826 /******************************************************************************
 827  * PolyBezierTo [GDI32.@]
 828  * Draws one or more Bezier curves
 829  *
 830  * PARAMS
 831  *    hDc     [I] Handle to device context
 832  *    lppt    [I] Pointer to endpoints and control points
 833  *    cPoints [I] Count of endpoints and control points
 834  *
 835  * RETURNS
 836  *    Success: TRUE
 837  *    Failure: FALSE
 838  */
 839 BOOL WINAPI PolyBezierTo( HDC hdc, const POINT* lppt, DWORD cPoints )
 840 {
 841     DC * dc;
 842     BOOL ret;
 843     PHYSDEV physdev;
 844
 845     /* cbPoints must be 3 * n (where n>=1) */
 846     if (!cPoints || (cPoints % 3) != 0) return FALSE;
 847
 848     dc = get_dc_ptr( hdc );
 849     if(!dc) return FALSE;
 850
 851     update_dc( dc );
 852     physdev = GET_DC_PHYSDEV( dc, pPolyBezierTo );
 853     ret = physdev->funcs->pPolyBezierTo( physdev, lppt, cPoints );
 854
 855     if(ret) {
 856         dc->CursPosX = lppt[cPoints-1].x;
 857         dc->CursPosY = lppt[cPoints-1].y;
 858     }
 859     release_dc_ptr( dc );
 860     return ret;
 861 }
 862
 863 /***********************************************************************
 864  *      AngleArc (GDI32.@)
 865  */
 866 BOOL WINAPI AngleArc(HDC hdc, INT x, INT y, DWORD dwRadius, FLOAT eStartAngle, FLOAT eSweepAngle)
 867 {
 868     PHYSDEV physdev;
 869     BOOL result;
 870     DC *dc;
 871
 872     if( (signed int)dwRadius < 0 )
 873         return FALSE;
 874
 875     dc = get_dc_ptr( hdc );
 876     if(!dc) return FALSE;
 877
 878     update_dc( dc );
 879     physdev = GET_DC_PHYSDEV( dc, pAngleArc );
 880     result = physdev->funcs->pAngleArc( physdev, x, y, dwRadius, eStartAngle, eSweepAngle );
 881
 882     if (result) {
 883         dc->CursPosX = GDI_ROUND( x + cos((eStartAngle+eSweepAngle)*M_PI/180) * dwRadius );
 884         dc->CursPosY = GDI_ROUND( y - sin((eStartAngle+eSweepAngle)*M_PI/180) * dwRadius );
 885     }
 886     release_dc_ptr( dc );
 887     return result;
 888 }
 889
 890 /***********************************************************************
 891  *      PolyDraw (GDI32.@)
 892  */
 893 BOOL WINAPI PolyDraw(HDC hdc, const POINT *lppt, const BYTE *lpbTypes,
 894                        DWORD cCount)
 895 {
 896     DC *dc = get_dc_ptr( hdc );
 897     PHYSDEV physdev;
 898     BOOL result;
 899
 900     if(!dc) return FALSE;
 901
 902     update_dc( dc );
 903     physdev = GET_DC_PHYSDEV( dc, pPolyDraw );
 904     result = physdev->funcs->pPolyDraw( physdev, lppt, lpbTypes, cCount );
 905     release_dc_ptr( dc );
 906     return result;
 907 }
 908
 909
 910 /**********************************************************************
 911  *           LineDDA   (GDI32.@)
 912  */
 913 BOOL WINAPI LineDDA(INT nXStart, INT nYStart, INT nXEnd, INT nYEnd,
 914                     LINEDDAPROC callback, LPARAM lParam )
 915 {
 916     INT xadd = 1, yadd = 1;
 917     INT err,erradd;
 918     INT cnt;
 919     INT dx = nXEnd - nXStart;
 920     INT dy = nYEnd - nYStart;
 921
 922     if (dx < 0)
 923     {
 924         dx = -dx;
 925         xadd = -1;
 926     }
 927     if (dy < 0)
 928     {
 929         dy = -dy;
 930         yadd = -1;
 931     }
 932     if (dx > dy)  /* line is "more horizontal" */
 933     {
 934         err = 2*dy - dx; erradd = 2*dy - 2*dx;
 935         for(cnt = 0;cnt < dx; cnt++)
 936         {
 937             callback(nXStart,nYStart,lParam);
 938             if (err > 0)
 939             {
 940                 nYStart += yadd;
 941                 err += erradd;
 942             }
 943             else err += 2*dy;
 944             nXStart += xadd;
 945         }
 946     }
 947     else   /* line is "more vertical" */
 948     {
 949         err = 2*dx - dy; erradd = 2*dx - 2*dy;
 950         for(cnt = 0;cnt < dy; cnt++)
 951         {
 952             callback(nXStart,nYStart,lParam);
 953             if (err > 0)
 954             {
 955                 nXStart += xadd;
 956                 err += erradd;
 957             }
 958             else err += 2*dx;
 959             nYStart += yadd;
 960         }
 961     }
 962     return TRUE;
 963 }
 964
 965
 966 /******************************************************************
 967  *
 968  *   *Very* simple bezier drawing code,
 969  *
 970  *   It uses a recursive algorithm to divide the curve in a series
 971  *   of straight line segments. Not ideal but sufficient for me.
 972  *   If you are in need for something better look for some incremental
 973  *   algorithm.
 974  *
 975  *   7 July 1998 Rein Klazes
 976  */
 977
 978  /*
 979   * some macro definitions for bezier drawing
 980   *
 981   * to avoid truncation errors the coordinates are
 982   * shifted upwards. When used in drawing they are
 983   * shifted down again, including correct rounding
 984   * and avoiding floating point arithmetic
 985   * 4 bits should allow 27 bits coordinates which I saw
 986   * somewhere in the win32 doc's
 987   *
 988   */
 989
 990 #define BEZIERSHIFTBITS 4
 991 #define BEZIERSHIFTUP(x)    ((x)<<BEZIERSHIFTBITS)
 992 #define BEZIERPIXEL        BEZIERSHIFTUP(1)
 993 #define BEZIERSHIFTDOWN(x)  (((x)+(1<<(BEZIERSHIFTBITS-1)))>>BEZIERSHIFTBITS)
 994 /* maximum depth of recursion */
 995 #define BEZIERMAXDEPTH  8
 996
 997 /* size of array to store points on */
 998 /* enough for one curve */
 999 #define BEZIER_INITBUFSIZE    (150)
1000
1001 /* calculate Bezier average, in this case the middle
1002  * correctly rounded...
1003  * */
1004
1005 #define BEZIERMIDDLE(Mid, P1, P2) \
1006     (Mid).x=((P1).x+(P2).x + 1)/2;\
1007     (Mid).y=((P1).y+(P2).y + 1)/2;
1008
1009 /**********************************************************
1010 * BezierCheck helper function to check
1011 * that recursion can be terminated
1012 *       Points[0] and Points[3] are begin and endpoint
1013 *       Points[1] and Points[2] are control points
1014 *       level is the recursion depth
1015 *       returns true if the recursion can be terminated
1016 */
1017 static BOOL BezierCheck( int level, POINT *Points)
1018 {
1019     INT dx, dy;
1020     dx=Points[3].x-Points[0].x;
1021     dy=Points[3].y-Points[0].y;
1022     if(abs(dy)<=abs(dx)){/* shallow line */
1023         /* check that control points are between begin and end */
1024         if(Points[1].x < Points[0].x){
1025             if(Points[1].x < Points[3].x)
1026                 return FALSE;
1027         }else
1028             if(Points[1].x > Points[3].x)
1029                 return FALSE;
1030         if(Points[2].x < Points[0].x){
1031             if(Points[2].x < Points[3].x)
1032                 return FALSE;
1033         }else
1034             if(Points[2].x > Points[3].x)
1035                 return FALSE;
1036         dx=BEZIERSHIFTDOWN(dx);
1037         if(!dx) return TRUE;
1038         if(abs(Points[1].y-Points[0].y-(dy/dx)*
1039                 BEZIERSHIFTDOWN(Points[1].x-Points[0].x)) > BEZIERPIXEL ||
1040            abs(Points[2].y-Points[0].y-(dy/dx)*
1041                    BEZIERSHIFTDOWN(Points[2].x-Points[0].x)) > BEZIERPIXEL )
1042             return FALSE;
1043         else
1044             return TRUE;
1045     }else{ /* steep line */
1046         /* check that control points are between begin and end */
1047         if(Points[1].y < Points[0].y){
1048             if(Points[1].y < Points[3].y)
1049                 return FALSE;
1050         }else
1051             if(Points[1].y > Points[3].y)
1052                 return FALSE;
1053         if(Points[2].y < Points[0].y){
1054             if(Points[2].y < Points[3].y)
1055                 return FALSE;
1056         }else
1057             if(Points[2].y > Points[3].y)
1058                 return FALSE;
1059         dy=BEZIERSHIFTDOWN(dy);
1060         if(!dy) return TRUE;
1061         if(abs(Points[1].x-Points[0].x-(dx/dy)*
1062                 BEZIERSHIFTDOWN(Points[1].y-Points[0].y)) > BEZIERPIXEL ||
1063            abs(Points[2].x-Points[0].x-(dx/dy)*
1064                    BEZIERSHIFTDOWN(Points[2].y-Points[0].y)) > BEZIERPIXEL )
1065             return FALSE;
1066         else
1067             return TRUE;
1068     }
1069 }
1070
1071 /* Helper for GDI_Bezier.
1072  * Just handles one Bezier, so Points should point to four POINTs
1073  */
1074 static void GDI_InternalBezier( POINT *Points, POINT **PtsOut, INT *dwOut,
1075                                 INT *nPtsOut, INT level )
1076 {
1077     if(*nPtsOut == *dwOut) {
1078         *dwOut *= 2;
1079         *PtsOut = HeapReAlloc( GetProcessHeap(), 0, *PtsOut,
1080                                *dwOut * sizeof(POINT) );
1081     }
1082
1083     if(!level || BezierCheck(level, Points)) {
1084         if(*nPtsOut == 0) {
1085             (*PtsOut)[0].x = BEZIERSHIFTDOWN(Points[0].x);
1086             (*PtsOut)[0].y = BEZIERSHIFTDOWN(Points[0].y);
1087             *nPtsOut = 1;
1088         }
1089         (*PtsOut)[*nPtsOut].x = BEZIERSHIFTDOWN(Points[3].x);
1090         (*PtsOut)[*nPtsOut].y = BEZIERSHIFTDOWN(Points[3].y);
1091         (*nPtsOut) ++;
1092     } else {
1093         POINT Points2[4]; /* for the second recursive call */
1094         Points2[3]=Points[3];
1095         BEZIERMIDDLE(Points2[2], Points[2], Points[3]);
1096         BEZIERMIDDLE(Points2[0], Points[1], Points[2]);
1097         BEZIERMIDDLE(Points2[1],Points2[0],Points2[2]);
1098
1099         BEZIERMIDDLE(Points[1], Points[0],  Points[1]);
1100         BEZIERMIDDLE(Points[2], Points[1], Points2[0]);
1101         BEZIERMIDDLE(Points[3], Points[2], Points2[1]);
1102
1103         Points2[0]=Points[3];
1104
1105         /* do the two halves */
1106         GDI_InternalBezier(Points, PtsOut, dwOut, nPtsOut, level-1);
1107         GDI_InternalBezier(Points2, PtsOut, dwOut, nPtsOut, level-1);
1108     }
1109 }
1110
1111
1112
1113 /***********************************************************************
1114  *           GDI_Bezier   [INTERNAL]
1115  *   Calculate line segments that approximate -what microsoft calls- a bezier
1116  *   curve.
1117  *   The routine recursively divides the curve in two parts until a straight
1118  *   line can be drawn
1119  *
1120  *  PARAMS
1121  *
1122  *  Points  [I] Ptr to count POINTs which are the end and control points
1123  *              of the set of Bezier curves to flatten.
1124  *  count   [I] Number of Points.  Must be 3n+1.
1125  *  nPtsOut [O] Will contain no of points that have been produced (i.e. no. of
1126  *              lines+1).
1127  *
1128  *  RETURNS
1129  *
1130  *  Ptr to an array of POINTs that contain the lines that approximate the
1131  *  Beziers.  The array is allocated on the process heap and it is the caller's
1132  *  responsibility to HeapFree it. [this is not a particularly nice interface
1133  *  but since we can't know in advance how many points we will generate, the
1134  *  alternative would be to call the function twice, once to determine the size
1135  *  and a second time to do the work - I decided this was too much of a pain].
1136  */
1137 POINT *GDI_Bezier( const POINT *Points, INT count, INT *nPtsOut )
1138 {
1139     POINT *out;
1140     INT Bezier, dwOut = BEZIER_INITBUFSIZE, i;
1141
1142     if (count == 1 || (count - 1) % 3 != 0) {
1143         ERR("Invalid no. of points %d\n", count);
1144         return NULL;
1145     }
1146     *nPtsOut = 0;
1147     out = HeapAlloc( GetProcessHeap(), 0, dwOut * sizeof(POINT));
1148     for(Bezier = 0; Bezier < (count-1)/3; Bezier++) {
1149         POINT ptBuf[4];
1150         memcpy(ptBuf, Points + Bezier * 3, sizeof(POINT) * 4);
1151         for(i = 0; i < 4; i++) {
1152             ptBuf[i].x = BEZIERSHIFTUP(ptBuf[i].x);
1153             ptBuf[i].y = BEZIERSHIFTUP(ptBuf[i].y);
1154         }
1155         GDI_InternalBezier( ptBuf, &out, &dwOut, nPtsOut, BEZIERMAXDEPTH );
1156     }
1157     TRACE("Produced %d points\n", *nPtsOut);
1158     return out;
1159 }
1160
1161 /******************************************************************************
1162  *           GdiGradientFill   (GDI32.@)
1163  */
1164 BOOL WINAPI GdiGradientFill( HDC hdc, TRIVERTEX *vert_array, ULONG nvert,
1165                              void *grad_array, ULONG ngrad, ULONG mode )
1166 {
1167     DC *dc;
1168     PHYSDEV physdev;
1169     BOOL ret;
1170     ULONG i;
1171
1172     TRACE("%p vert_array:%p nvert:%d grad_array:%p ngrad:%d\n", hdc, vert_array, nvert, grad_array, ngrad);
1173
1174     if (!vert_array || !nvert || !grad_array || !ngrad || mode > GRADIENT_FILL_TRIANGLE)
1175     {
1176         SetLastError( ERROR_INVALID_PARAMETER );
1177         return FALSE;
1178     }
1179     for (i = 0; i < ngrad * (mode == GRADIENT_FILL_TRIANGLE ? 3 : 2); i++)
1180         if (((ULONG *)grad_array)[i] >= nvert) return FALSE;
1181
1182     if (!(dc = get_dc_ptr( hdc )))
1183     {
1184         SetLastError( ERROR_INVALID_PARAMETER );
1185         return FALSE;
1186     }
1187     update_dc( dc );
1188     physdev = GET_DC_PHYSDEV( dc, pGradientFill );
1189     ret = physdev->funcs->pGradientFill( physdev, vert_array, nvert, grad_array, ngrad, mode );
1190     release_dc_ptr( dc );
1191     return ret;
1192 }
1193
1194 /******************************************************************************
1195  *           GdiDrawStream   (GDI32.@)
1196  *
1197  */
1198 BOOL WINAPI GdiDrawStream( HDC hdc, ULONG in, void * pvin )
1199 {
1200     FIXME("stub: %p, %d, %p\n", hdc, in, pvin);
1201     return FALSE;
1202 }