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         update_dc( dc );
 480         /* FIXME: should this be in the graphics driver? */
 481         if (PtVisible( hdc, x, y ))
 482         {
 483             PHYSDEV physdev = GET_DC_PHYSDEV( dc, pGetPixel );
 484             ret = physdev->funcs->pGetPixel( physdev, x, y );
 485         }
 486         release_dc_ptr( dc );
 487     }
 488     return ret;
 489 }
 490
 491
 492 /******************************************************************************
 493  * ChoosePixelFormat [GDI32.@]
 494  * Matches a pixel format to given format
 495  *
 496  * PARAMS
 497  *    hdc  [I] Device context to search for best pixel match
 498  *    ppfd [I] Pixel format for which a match is sought
 499  *
 500  * RETURNS
 501  *    Success: Pixel format index closest to given format
 502  *    Failure: 0
 503  */
 504 INT WINAPI ChoosePixelFormat( HDC hdc, const PIXELFORMATDESCRIPTOR* ppfd )
 505 {
 506     INT ret = 0;
 507     DC * dc = get_dc_ptr( hdc );
 508
 509     TRACE("(%p,%p)\n",hdc,ppfd);
 510
 511     if (dc)
 512     {
 513         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pChoosePixelFormat );
 514         ret = physdev->funcs->pChoosePixelFormat( physdev, ppfd );
 515         release_dc_ptr( dc );
 516     }
 517     return ret;
 518 }
 519
 520
 521 /******************************************************************************
 522  * SetPixelFormat [GDI32.@]
 523  * Sets pixel format of device context
 524  *
 525  * PARAMS
 526  *    hdc          [I] Device context to search for best pixel match
 527  *    iPixelFormat [I] Pixel format index
 528  *    ppfd         [I] Pixel format for which a match is sought
 529  *
 530  * RETURNS
 531  *    Success: TRUE
 532  *    Failure: FALSE
 533  */
 534 BOOL WINAPI SetPixelFormat( HDC hdc, INT iPixelFormat,
 535                             const PIXELFORMATDESCRIPTOR *ppfd)
 536 {
 537     INT bRet = FALSE;
 538     DC * dc = get_dc_ptr( hdc );
 539
 540     TRACE("(%p,%d,%p)\n",hdc,iPixelFormat,ppfd);
 541
 542     if (dc)
 543     {
 544         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetPixelFormat );
 545         update_dc( dc );
 546         bRet = physdev->funcs->pSetPixelFormat( physdev, iPixelFormat, ppfd );
 547         release_dc_ptr( dc );
 548     }
 549     return bRet;
 550 }
 551
 552
 553 /******************************************************************************
 554  * GetPixelFormat [GDI32.@]
 555  * Gets index of pixel format of DC
 556  *
 557  * PARAMETERS
 558  *    hdc [I] Device context whose pixel format index is sought
 559  *
 560  * RETURNS
 561  *    Success: Currently selected pixel format
 562  *    Failure: 0
 563  */
 564 INT WINAPI GetPixelFormat( HDC hdc )
 565 {
 566     INT ret = 0;
 567     DC * dc = get_dc_ptr( hdc );
 568
 569     TRACE("(%p)\n",hdc);
 570
 571     if (dc)
 572     {
 573         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pGetPixelFormat );
 574         update_dc( dc );
 575         ret = physdev->funcs->pGetPixelFormat( physdev );
 576         release_dc_ptr( dc );
 577     }
 578     return ret;
 579 }
 580
 581
 582 /******************************************************************************
 583  * DescribePixelFormat [GDI32.@]
 584  * Gets info about pixel format from DC
 585  *
 586  * PARAMS
 587  *    hdc          [I] Device context
 588  *    iPixelFormat [I] Pixel format selector
 589  *    nBytes       [I] Size of buffer
 590  *    ppfd         [O] Pointer to structure to receive pixel format data
 591  *
 592  * RETURNS
 593  *    Success: Maximum pixel format index of the device context
 594  *    Failure: 0
 595  */
 596 INT WINAPI DescribePixelFormat( HDC hdc, INT iPixelFormat, UINT nBytes,
 597                                 LPPIXELFORMATDESCRIPTOR ppfd )
 598 {
 599     INT ret = 0;
 600     DC * dc = get_dc_ptr( hdc );
 601
 602     TRACE("(%p,%d,%d,%p): stub\n",hdc,iPixelFormat,nBytes,ppfd);
 603
 604     if (dc)
 605     {
 606         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pDescribePixelFormat );
 607         update_dc( dc );
 608         ret = physdev->funcs->pDescribePixelFormat( physdev, iPixelFormat, nBytes, ppfd );
 609         release_dc_ptr( dc );
 610     }
 611     return ret;
 612 }
 613
 614
 615 /******************************************************************************
 616  * SwapBuffers [GDI32.@]
 617  * Exchanges front and back buffers of window
 618  *
 619  * PARAMS
 620  *    hdc [I] Device context whose buffers get swapped
 621  *
 622  * RETURNS
 623  *    Success: TRUE
 624  *    Failure: FALSE
 625  */
 626 BOOL WINAPI SwapBuffers( HDC hdc )
 627 {
 628     INT bRet = FALSE;
 629     DC * dc = get_dc_ptr( hdc );
 630
 631     TRACE("(%p)\n",hdc);
 632
 633     if (dc)
 634     {
 635         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSwapBuffers );
 636         update_dc( dc );
 637         bRet = physdev->funcs->pSwapBuffers( physdev );
 638         release_dc_ptr( dc );
 639     }
 640     return bRet;
 641 }
 642
 643
 644 /***********************************************************************
 645  *           PaintRgn    (GDI32.@)
 646  */
 647 BOOL WINAPI PaintRgn( HDC hdc, HRGN hrgn )
 648 {
 649     BOOL ret = FALSE;
 650     DC * dc = get_dc_ptr( hdc );
 651
 652     if (dc)
 653     {
 654         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pPaintRgn );
 655         update_dc( dc );
 656         ret = physdev->funcs->pPaintRgn( physdev, hrgn );
 657         release_dc_ptr( dc );
 658     }
 659     return ret;
 660 }
 661
 662
 663 /***********************************************************************
 664  *           FillRgn    (GDI32.@)
 665  */
 666 BOOL WINAPI FillRgn( HDC hdc, HRGN hrgn, HBRUSH hbrush )
 667 {
 668     BOOL retval = FALSE;
 669     DC * dc = get_dc_ptr( hdc );
 670
 671     if (dc)
 672     {
 673         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pFillRgn );
 674         update_dc( dc );
 675         retval = physdev->funcs->pFillRgn( physdev, hrgn, hbrush );
 676         release_dc_ptr( dc );
 677     }
 678     return retval;
 679 }
 680
 681
 682 /***********************************************************************
 683  *           FrameRgn     (GDI32.@)
 684  */
 685 BOOL WINAPI FrameRgn( HDC hdc, HRGN hrgn, HBRUSH hbrush,
 686                           INT nWidth, INT nHeight )
 687 {
 688     BOOL ret = FALSE;
 689     DC *dc = get_dc_ptr( hdc );
 690
 691     if (dc)
 692     {
 693         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pFrameRgn );
 694         update_dc( dc );
 695         ret = physdev->funcs->pFrameRgn( physdev, hrgn, hbrush, nWidth, nHeight );
 696         release_dc_ptr( dc );
 697     }
 698     return ret;
 699 }
 700
 701
 702 /***********************************************************************
 703  *           InvertRgn    (GDI32.@)
 704  */
 705 BOOL WINAPI InvertRgn( HDC hdc, HRGN hrgn )
 706 {
 707     BOOL ret = FALSE;
 708     DC *dc = get_dc_ptr( hdc );
 709
 710     if (dc)
 711     {
 712         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pInvertRgn );
 713         update_dc( dc );
 714         ret = physdev->funcs->pInvertRgn( physdev, hrgn );
 715         release_dc_ptr( dc );
 716     }
 717     return ret;
 718 }
 719
 720
 721 /**********************************************************************
 722  *          Polyline   (GDI32.@)
 723  */
 724 BOOL WINAPI Polyline( HDC hdc, const POINT* pt, INT count )
 725 {
 726     BOOL ret = FALSE;
 727     DC * dc = get_dc_ptr( hdc );
 728
 729     if (dc)
 730     {
 731         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pPolyline );
 732         update_dc( dc );
 733         ret = physdev->funcs->pPolyline( physdev, pt, count );
 734         release_dc_ptr( dc );
 735     }
 736     return ret;
 737 }
 738
 739 /**********************************************************************
 740  *          PolylineTo   (GDI32.@)
 741  */
 742 BOOL WINAPI PolylineTo( HDC hdc, const POINT* pt, DWORD cCount )
 743 {
 744     DC * dc = get_dc_ptr( hdc );
 745     PHYSDEV physdev;
 746     BOOL ret;
 747
 748     if(!dc) return FALSE;
 749
 750     update_dc( dc );
 751     physdev = GET_DC_PHYSDEV( dc, pPolylineTo );
 752     ret = physdev->funcs->pPolylineTo( physdev, pt, cCount );
 753
 754     if (ret && cCount)
 755     {
 756         dc->CursPosX = pt[cCount-1].x;
 757         dc->CursPosY = pt[cCount-1].y;
 758     }
 759     release_dc_ptr( dc );
 760     return ret;
 761 }
 762
 763
 764 /**********************************************************************
 765  *          Polygon  (GDI32.@)
 766  */
 767 BOOL WINAPI Polygon( HDC hdc, const POINT* pt, INT count )
 768 {
 769     BOOL ret = FALSE;
 770     DC * dc = get_dc_ptr( hdc );
 771
 772     if (dc)
 773     {
 774         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pPolygon );
 775         update_dc( dc );
 776         ret = physdev->funcs->pPolygon( physdev, pt, count );
 777         release_dc_ptr( dc );
 778     }
 779     return ret;
 780 }
 781
 782
 783 /**********************************************************************
 784  *          PolyPolygon  (GDI32.@)
 785  */
 786 BOOL WINAPI PolyPolygon( HDC hdc, const POINT* pt, const INT* counts,
 787                              UINT polygons )
 788 {
 789     BOOL ret = FALSE;
 790     DC * dc = get_dc_ptr( hdc );
 791
 792     if (dc)
 793     {
 794         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pPolyPolygon );
 795         update_dc( dc );
 796         ret = physdev->funcs->pPolyPolygon( physdev, pt, counts, polygons );
 797         release_dc_ptr( dc );
 798     }
 799     return ret;
 800 }
 801
 802 /**********************************************************************
 803  *          PolyPolyline  (GDI32.@)
 804  */
 805 BOOL WINAPI PolyPolyline( HDC hdc, const POINT* pt, const DWORD* counts,
 806                             DWORD polylines )
 807 {
 808     BOOL ret = FALSE;
 809     DC * dc = get_dc_ptr( hdc );
 810
 811     if (dc)
 812     {
 813         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pPolyPolyline );
 814         update_dc( dc );
 815         ret = physdev->funcs->pPolyPolyline( physdev, pt, counts, polylines );
 816         release_dc_ptr( dc );
 817     }
 818     return ret;
 819 }
 820
 821 /**********************************************************************
 822  *          ExtFloodFill   (GDI32.@)
 823  */
 824 BOOL WINAPI ExtFloodFill( HDC hdc, INT x, INT y, COLORREF color,
 825                               UINT fillType )
 826 {
 827     BOOL ret = FALSE;
 828     DC * dc = get_dc_ptr( hdc );
 829
 830     if (dc)
 831     {
 832         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pExtFloodFill );
 833
 834         update_dc( dc );
 835         ret = physdev->funcs->pExtFloodFill( physdev, x, y, color, fillType );
 836         release_dc_ptr( dc );
 837     }
 838     return ret;
 839 }
 840
 841
 842 /**********************************************************************
 843  *          FloodFill   (GDI32.@)
 844  */
 845 BOOL WINAPI FloodFill( HDC hdc, INT x, INT y, COLORREF color )
 846 {
 847     return ExtFloodFill( hdc, x, y, color, FLOODFILLBORDER );
 848 }
 849
 850
 851 /******************************************************************************
 852  * PolyBezier [GDI32.@]
 853  * Draws one or more Bezier curves
 854  *
 855  * PARAMS
 856  *    hDc     [I] Handle to device context
 857  *    lppt    [I] Pointer to endpoints and control points
 858  *    cPoints [I] Count of endpoints and control points
 859  *
 860  * RETURNS
 861  *    Success: TRUE
 862  *    Failure: FALSE
 863  */
 864 BOOL WINAPI PolyBezier( HDC hdc, const POINT* lppt, DWORD cPoints )
 865 {
 866     PHYSDEV physdev;
 867     BOOL ret;
 868     DC * dc;
 869
 870     /* cPoints must be 3 * n + 1 (where n>=1) */
 871     if (cPoints == 1 || (cPoints % 3) != 1) return FALSE;
 872
 873     dc = get_dc_ptr( hdc );
 874     if(!dc) return FALSE;
 875
 876     update_dc( dc );
 877     physdev = GET_DC_PHYSDEV( dc, pPolyBezier );
 878     ret = physdev->funcs->pPolyBezier( physdev, lppt, cPoints );
 879     release_dc_ptr( dc );
 880     return ret;
 881 }
 882
 883 /******************************************************************************
 884  * PolyBezierTo [GDI32.@]
 885  * Draws one or more Bezier curves
 886  *
 887  * PARAMS
 888  *    hDc     [I] Handle to device context
 889  *    lppt    [I] Pointer to endpoints and control points
 890  *    cPoints [I] Count of endpoints and control points
 891  *
 892  * RETURNS
 893  *    Success: TRUE
 894  *    Failure: FALSE
 895  */
 896 BOOL WINAPI PolyBezierTo( HDC hdc, const POINT* lppt, DWORD cPoints )
 897 {
 898     DC * dc;
 899     BOOL ret;
 900     PHYSDEV physdev;
 901
 902     /* cbPoints must be 3 * n (where n>=1) */
 903     if (!cPoints || (cPoints % 3) != 0) return FALSE;
 904
 905     dc = get_dc_ptr( hdc );
 906     if(!dc) return FALSE;
 907
 908     update_dc( dc );
 909     physdev = GET_DC_PHYSDEV( dc, pPolyBezierTo );
 910     ret = physdev->funcs->pPolyBezierTo( physdev, lppt, cPoints );
 911
 912     if(ret) {
 913         dc->CursPosX = lppt[cPoints-1].x;
 914         dc->CursPosY = lppt[cPoints-1].y;
 915     }
 916     release_dc_ptr( dc );
 917     return ret;
 918 }
 919
 920 /***********************************************************************
 921  *      AngleArc (GDI32.@)
 922  */
 923 BOOL WINAPI AngleArc(HDC hdc, INT x, INT y, DWORD dwRadius, FLOAT eStartAngle, FLOAT eSweepAngle)
 924 {
 925     PHYSDEV physdev;
 926     BOOL result;
 927     DC *dc;
 928
 929     if( (signed int)dwRadius < 0 )
 930         return FALSE;
 931
 932     dc = get_dc_ptr( hdc );
 933     if(!dc) return FALSE;
 934
 935     update_dc( dc );
 936     physdev = GET_DC_PHYSDEV( dc, pAngleArc );
 937     result = physdev->funcs->pAngleArc( physdev, x, y, dwRadius, eStartAngle, eSweepAngle );
 938
 939     if (result) {
 940         dc->CursPosX = GDI_ROUND( x + cos((eStartAngle+eSweepAngle)*M_PI/180) * dwRadius );
 941         dc->CursPosY = GDI_ROUND( y - sin((eStartAngle+eSweepAngle)*M_PI/180) * dwRadius );
 942     }
 943     release_dc_ptr( dc );
 944     return result;
 945 }
 946
 947 /***********************************************************************
 948  *      PolyDraw (GDI32.@)
 949  */
 950 BOOL WINAPI PolyDraw(HDC hdc, const POINT *lppt, const BYTE *lpbTypes,
 951                        DWORD cCount)
 952 {
 953     DC *dc = get_dc_ptr( hdc );
 954     PHYSDEV physdev;
 955     BOOL result;
 956
 957     if(!dc) return FALSE;
 958
 959     update_dc( dc );
 960     physdev = GET_DC_PHYSDEV( dc, pPolyDraw );
 961     result = physdev->funcs->pPolyDraw( physdev, lppt, lpbTypes, cCount );
 962     release_dc_ptr( dc );
 963     return result;
 964 }
 965
 966
 967 /**********************************************************************
 968  *           LineDDA   (GDI32.@)
 969  */
 970 BOOL WINAPI LineDDA(INT nXStart, INT nYStart, INT nXEnd, INT nYEnd,
 971                     LINEDDAPROC callback, LPARAM lParam )
 972 {
 973     INT xadd = 1, yadd = 1;
 974     INT err,erradd;
 975     INT cnt;
 976     INT dx = nXEnd - nXStart;
 977     INT dy = nYEnd - nYStart;
 978
 979     if (dx < 0)
 980     {
 981         dx = -dx;
 982         xadd = -1;
 983     }
 984     if (dy < 0)
 985     {
 986         dy = -dy;
 987         yadd = -1;
 988     }
 989     if (dx > dy)  /* line is "more horizontal" */
 990     {
 991         err = 2*dy - dx; erradd = 2*dy - 2*dx;
 992         for(cnt = 0;cnt < dx; cnt++)
 993         {
 994             callback(nXStart,nYStart,lParam);
 995             if (err > 0)
 996             {
 997                 nYStart += yadd;
 998                 err += erradd;
 999             }
1000             else err += 2*dy;
1001             nXStart += xadd;
1002         }
1003     }
1004     else   /* line is "more vertical" */
1005     {
1006         err = 2*dx - dy; erradd = 2*dx - 2*dy;
1007         for(cnt = 0;cnt < dy; cnt++)
1008         {
1009             callback(nXStart,nYStart,lParam);
1010             if (err > 0)
1011             {
1012                 nXStart += xadd;
1013                 err += erradd;
1014             }
1015             else err += 2*dx;
1016             nYStart += yadd;
1017         }
1018     }
1019     return TRUE;
1020 }
1021
1022
1023 /******************************************************************
1024  *
1025  *   *Very* simple bezier drawing code,
1026  *
1027  *   It uses a recursive algorithm to divide the curve in a series
1028  *   of straight line segments. Not ideal but sufficient for me.
1029  *   If you are in need for something better look for some incremental
1030  *   algorithm.
1031  *
1032  *   7 July 1998 Rein Klazes
1033  */
1034
1035  /*
1036   * some macro definitions for bezier drawing
1037   *
1038   * to avoid truncation errors the coordinates are
1039   * shifted upwards. When used in drawing they are
1040   * shifted down again, including correct rounding
1041   * and avoiding floating point arithmetic
1042   * 4 bits should allow 27 bits coordinates which I saw
1043   * somewhere in the win32 doc's
1044   *
1045   */
1046
1047 #define BEZIERSHIFTBITS 4
1048 #define BEZIERSHIFTUP(x)    ((x)<<BEZIERSHIFTBITS)
1049 #define BEZIERPIXEL        BEZIERSHIFTUP(1)
1050 #define BEZIERSHIFTDOWN(x)  (((x)+(1<<(BEZIERSHIFTBITS-1)))>>BEZIERSHIFTBITS)
1051 /* maximum depth of recursion */
1052 #define BEZIERMAXDEPTH  8
1053
1054 /* size of array to store points on */
1055 /* enough for one curve */
1056 #define BEZIER_INITBUFSIZE    (150)
1057
1058 /* calculate Bezier average, in this case the middle
1059  * correctly rounded...
1060  * */
1061
1062 #define BEZIERMIDDLE(Mid, P1, P2) \
1063     (Mid).x=((P1).x+(P2).x + 1)/2;\
1064     (Mid).y=((P1).y+(P2).y + 1)/2;
1065
1066 /**********************************************************
1067 * BezierCheck helper function to check
1068 * that recursion can be terminated
1069 *       Points[0] and Points[3] are begin and endpoint
1070 *       Points[1] and Points[2] are control points
1071 *       level is the recursion depth
1072 *       returns true if the recursion can be terminated
1073 */
1074 static BOOL BezierCheck( int level, POINT *Points)
1075 {
1076     INT dx, dy;
1077     dx=Points[3].x-Points[0].x;
1078     dy=Points[3].y-Points[0].y;
1079     if(abs(dy)<=abs(dx)){/* shallow line */
1080         /* check that control points are between begin and end */
1081         if(Points[1].x < Points[0].x){
1082             if(Points[1].x < Points[3].x)
1083                 return FALSE;
1084         }else
1085             if(Points[1].x > Points[3].x)
1086                 return FALSE;
1087         if(Points[2].x < Points[0].x){
1088             if(Points[2].x < Points[3].x)
1089                 return FALSE;
1090         }else
1091             if(Points[2].x > Points[3].x)
1092                 return FALSE;
1093         dx=BEZIERSHIFTDOWN(dx);
1094         if(!dx) return TRUE;
1095         if(abs(Points[1].y-Points[0].y-(dy/dx)*
1096                 BEZIERSHIFTDOWN(Points[1].x-Points[0].x)) > BEZIERPIXEL ||
1097            abs(Points[2].y-Points[0].y-(dy/dx)*
1098                    BEZIERSHIFTDOWN(Points[2].x-Points[0].x)) > BEZIERPIXEL )
1099             return FALSE;
1100         else
1101             return TRUE;
1102     }else{ /* steep line */
1103         /* check that control points are between begin and end */
1104         if(Points[1].y < Points[0].y){
1105             if(Points[1].y < Points[3].y)
1106                 return FALSE;
1107         }else
1108             if(Points[1].y > Points[3].y)
1109                 return FALSE;
1110         if(Points[2].y < Points[0].y){
1111             if(Points[2].y < Points[3].y)
1112                 return FALSE;
1113         }else
1114             if(Points[2].y > Points[3].y)
1115                 return FALSE;
1116         dy=BEZIERSHIFTDOWN(dy);
1117         if(!dy) return TRUE;
1118         if(abs(Points[1].x-Points[0].x-(dx/dy)*
1119                 BEZIERSHIFTDOWN(Points[1].y-Points[0].y)) > BEZIERPIXEL ||
1120            abs(Points[2].x-Points[0].x-(dx/dy)*
1121                    BEZIERSHIFTDOWN(Points[2].y-Points[0].y)) > BEZIERPIXEL )
1122             return FALSE;
1123         else
1124             return TRUE;
1125     }
1126 }
1127
1128 /* Helper for GDI_Bezier.
1129  * Just handles one Bezier, so Points should point to four POINTs
1130  */
1131 static void GDI_InternalBezier( POINT *Points, POINT **PtsOut, INT *dwOut,
1132                                 INT *nPtsOut, INT level )
1133 {
1134     if(*nPtsOut == *dwOut) {
1135         *dwOut *= 2;
1136         *PtsOut = HeapReAlloc( GetProcessHeap(), 0, *PtsOut,
1137                                *dwOut * sizeof(POINT) );
1138     }
1139
1140     if(!level || BezierCheck(level, Points)) {
1141         if(*nPtsOut == 0) {
1142             (*PtsOut)[0].x = BEZIERSHIFTDOWN(Points[0].x);
1143             (*PtsOut)[0].y = BEZIERSHIFTDOWN(Points[0].y);
1144             *nPtsOut = 1;
1145         }
1146         (*PtsOut)[*nPtsOut].x = BEZIERSHIFTDOWN(Points[3].x);
1147         (*PtsOut)[*nPtsOut].y = BEZIERSHIFTDOWN(Points[3].y);
1148         (*nPtsOut) ++;
1149     } else {
1150         POINT Points2[4]; /* for the second recursive call */
1151         Points2[3]=Points[3];
1152         BEZIERMIDDLE(Points2[2], Points[2], Points[3]);
1153         BEZIERMIDDLE(Points2[0], Points[1], Points[2]);
1154         BEZIERMIDDLE(Points2[1],Points2[0],Points2[2]);
1155
1156         BEZIERMIDDLE(Points[1], Points[0],  Points[1]);
1157         BEZIERMIDDLE(Points[2], Points[1], Points2[0]);
1158         BEZIERMIDDLE(Points[3], Points[2], Points2[1]);
1159
1160         Points2[0]=Points[3];
1161
1162         /* do the two halves */
1163         GDI_InternalBezier(Points, PtsOut, dwOut, nPtsOut, level-1);
1164         GDI_InternalBezier(Points2, PtsOut, dwOut, nPtsOut, level-1);
1165     }
1166 }
1167
1168
1169
1170 /***********************************************************************
1171  *           GDI_Bezier   [INTERNAL]
1172  *   Calculate line segments that approximate -what microsoft calls- a bezier
1173  *   curve.
1174  *   The routine recursively divides the curve in two parts until a straight
1175  *   line can be drawn
1176  *
1177  *  PARAMS
1178  *
1179  *  Points  [I] Ptr to count POINTs which are the end and control points
1180  *              of the set of Bezier curves to flatten.
1181  *  count   [I] Number of Points.  Must be 3n+1.
1182  *  nPtsOut [O] Will contain no of points that have been produced (i.e. no. of
1183  *              lines+1).
1184  *
1185  *  RETURNS
1186  *
1187  *  Ptr to an array of POINTs that contain the lines that approximate the
1188  *  Beziers.  The array is allocated on the process heap and it is the caller's
1189  *  responsibility to HeapFree it. [this is not a particularly nice interface
1190  *  but since we can't know in advance how many points we will generate, the
1191  *  alternative would be to call the function twice, once to determine the size
1192  *  and a second time to do the work - I decided this was too much of a pain].
1193  */
1194 POINT *GDI_Bezier( const POINT *Points, INT count, INT *nPtsOut )
1195 {
1196     POINT *out;
1197     INT Bezier, dwOut = BEZIER_INITBUFSIZE, i;
1198
1199     if (count == 1 || (count - 1) % 3 != 0) {
1200         ERR("Invalid no. of points %d\n", count);
1201         return NULL;
1202     }
1203     *nPtsOut = 0;
1204     out = HeapAlloc( GetProcessHeap(), 0, dwOut * sizeof(POINT));
1205     for(Bezier = 0; Bezier < (count-1)/3; Bezier++) {
1206         POINT ptBuf[4];
1207         memcpy(ptBuf, Points + Bezier * 3, sizeof(POINT) * 4);
1208         for(i = 0; i < 4; i++) {
1209             ptBuf[i].x = BEZIERSHIFTUP(ptBuf[i].x);
1210             ptBuf[i].y = BEZIERSHIFTUP(ptBuf[i].y);
1211         }
1212         GDI_InternalBezier( ptBuf, &out, &dwOut, nPtsOut, BEZIERMAXDEPTH );
1213     }
1214     TRACE("Produced %d points\n", *nPtsOut);
1215     return out;
1216 }
1217
1218 /******************************************************************************
1219  *           GdiGradientFill   (GDI32.@)
1220  */
1221 BOOL WINAPI GdiGradientFill( HDC hdc, TRIVERTEX *vert_array, ULONG nvert,
1222                              void *grad_array, ULONG ngrad, ULONG mode )
1223 {
1224     DC *dc;
1225     PHYSDEV physdev;
1226     BOOL ret;
1227     ULONG i;
1228
1229     TRACE("%p vert_array:%p nvert:%d grad_array:%p ngrad:%d\n", hdc, vert_array, nvert, grad_array, ngrad);
1230
1231     if (!vert_array || !nvert || !grad_array || !ngrad || mode > GRADIENT_FILL_TRIANGLE)
1232     {
1233         SetLastError( ERROR_INVALID_PARAMETER );
1234         return FALSE;
1235     }
1236     for (i = 0; i < ngrad * (mode == GRADIENT_FILL_TRIANGLE ? 3 : 2); i++)
1237         if (((ULONG *)grad_array)[i] >= nvert) return FALSE;
1238
1239     if (!(dc = get_dc_ptr( hdc )))
1240     {
1241         SetLastError( ERROR_INVALID_PARAMETER );
1242         return FALSE;
1243     }
1244     update_dc( dc );
1245     physdev = GET_DC_PHYSDEV( dc, pGradientFill );
1246     ret = physdev->funcs->pGradientFill( physdev, vert_array, nvert, grad_array, ngrad, mode );
1247     release_dc_ptr( dc );
1248     return ret;
1249 }
1250
1251 /******************************************************************************
1252  *           GdiDrawStream   (GDI32.@)
1253  *
1254  */
1255 BOOL WINAPI GdiDrawStream( HDC hdc, ULONG in, void * pvin )
1256 {
1257     FIXME("stub: %p, %d, %p\n", hdc, in, pvin);
1258     return FALSE;
1259 }