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     DWORD i;
 144     INT num_pts, num_bzr_pts, space, size;
 145
 146     /* check for valid point types */
 147     for (i = 0; i < count; i++)
 148     {
 149         switch (types[i])
 150         {
 151         case PT_MOVETO:
 152         case PT_LINETO | PT_CLOSEFIGURE:
 153         case PT_LINETO:
 154             break;
 155         case PT_BEZIERTO:
 156             if (i + 2 >= count) return FALSE;
 157             if (types[i + 1] != PT_BEZIERTO) return FALSE;
 158             if ((types[i + 2] & ~PT_CLOSEFIGURE) != PT_BEZIERTO) return FALSE;
 159             i += 2;
 160             break;
 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     PHYSDEV physdev;
 286     BOOL ret;
 287     DC * dc = get_dc_ptr( hdc );
 288
 289     if (!dc) return FALSE;
 290     update_dc( dc );
 291     physdev = GET_DC_PHYSDEV( dc, pArc );
 292     ret = physdev->funcs->pArc( physdev, left, top, right, bottom, xstart, ystart, xend, yend );
 293     release_dc_ptr( dc );
 294     return ret;
 295 }
 296
 297 /***********************************************************************
 298  *           ArcTo    (GDI32.@)
 299  */
 300 BOOL WINAPI ArcTo( HDC hdc,
 301                      INT left,   INT top,
 302                      INT right,  INT bottom,
 303                      INT xstart, INT ystart,
 304                      INT xend,   INT yend )
 305 {
 306     double width = abs( right - left ),
 307         height = abs( bottom - top ),
 308         xradius = width/2,
 309         yradius = height/2,
 310         xcenter = right > left ? left+xradius : right+xradius,
 311         ycenter = bottom > top ? top+yradius : bottom+yradius,
 312         angle;
 313     PHYSDEV physdev;
 314     BOOL result;
 315     DC * dc = get_dc_ptr( hdc );
 316     if(!dc) return FALSE;
 317
 318     update_dc( dc );
 319     physdev = GET_DC_PHYSDEV( dc, pArcTo );
 320     result = physdev->funcs->pArcTo( physdev, left, top, right, bottom, xstart, ystart, xend, yend );
 321
 322     if (result) {
 323         angle = atan2(((yend-ycenter)/height),
 324                       ((xend-xcenter)/width));
 325         dc->CursPosX = GDI_ROUND(xcenter+(cos(angle)*xradius));
 326         dc->CursPosY = GDI_ROUND(ycenter+(sin(angle)*yradius));
 327     }
 328     release_dc_ptr( dc );
 329     return result;
 330 }
 331
 332
 333 /***********************************************************************
 334  *           Pie   (GDI32.@)
 335  */
 336 BOOL WINAPI Pie( HDC hdc, INT left, INT top,
 337                      INT right, INT bottom, INT xstart, INT ystart,
 338                      INT xend, INT yend )
 339 {
 340     BOOL ret;
 341     PHYSDEV physdev;
 342     DC * dc = get_dc_ptr( hdc );
 343     if (!dc) return FALSE;
 344
 345     update_dc( dc );
 346     physdev = GET_DC_PHYSDEV( dc, pPie );
 347     ret = physdev->funcs->pPie( physdev, left, top, right, bottom, xstart, ystart, xend, yend );
 348     release_dc_ptr( dc );
 349     return ret;
 350 }
 351
 352
 353 /***********************************************************************
 354  *           Chord    (GDI32.@)
 355  */
 356 BOOL WINAPI Chord( HDC hdc, INT left, INT top,
 357                        INT right, INT bottom, INT xstart, INT ystart,
 358                        INT xend, INT yend )
 359 {
 360     BOOL ret;
 361     PHYSDEV physdev;
 362     DC * dc = get_dc_ptr( hdc );
 363     if (!dc) return FALSE;
 364
 365     update_dc( dc );
 366     physdev = GET_DC_PHYSDEV( dc, pChord );
 367     ret = physdev->funcs->pChord( physdev, left, top, right, bottom, xstart, ystart, xend, yend );
 368     release_dc_ptr( dc );
 369     return ret;
 370 }
 371
 372
 373 /***********************************************************************
 374  *           Ellipse    (GDI32.@)
 375  */
 376 BOOL WINAPI Ellipse( HDC hdc, INT left, INT top,
 377                          INT right, INT bottom )
 378 {
 379     BOOL ret;
 380     PHYSDEV physdev;
 381     DC * dc = get_dc_ptr( hdc );
 382     if (!dc) return FALSE;
 383
 384     update_dc( dc );
 385     physdev = GET_DC_PHYSDEV( dc, pEllipse );
 386     ret = physdev->funcs->pEllipse( physdev, left, top, right, bottom );
 387     release_dc_ptr( dc );
 388     return ret;
 389 }
 390
 391
 392 /***********************************************************************
 393  *           Rectangle    (GDI32.@)
 394  */
 395 BOOL WINAPI Rectangle( HDC hdc, INT left, INT top,
 396                            INT right, INT bottom )
 397 {
 398     PHYSDEV physdev;
 399     BOOL ret;
 400     DC * dc = get_dc_ptr( hdc );
 401
 402     if (!dc) return FALSE;
 403     update_dc( dc );
 404     physdev = GET_DC_PHYSDEV( dc, pRectangle );
 405     ret = physdev->funcs->pRectangle( physdev, left, top, right, bottom );
 406     release_dc_ptr( dc );
 407     return ret;
 408 }
 409
 410
 411 /***********************************************************************
 412  *           RoundRect    (GDI32.@)
 413  */
 414 BOOL WINAPI RoundRect( HDC hdc, INT left, INT top, INT right,
 415                            INT bottom, INT ell_width, INT ell_height )
 416 {
 417     PHYSDEV physdev;
 418     BOOL ret;
 419     DC *dc = get_dc_ptr( hdc );
 420
 421     if (!dc) return FALSE;
 422     update_dc( dc );
 423     physdev = GET_DC_PHYSDEV( dc, pRoundRect );
 424     ret = physdev->funcs->pRoundRect( physdev, left, top, right, bottom, ell_width, ell_height );
 425     release_dc_ptr( dc );
 426     return ret;
 427 }
 428
 429 /***********************************************************************
 430  *           SetPixel    (GDI32.@)
 431  */
 432 COLORREF WINAPI SetPixel( HDC hdc, INT x, INT y, COLORREF color )
 433 {
 434     PHYSDEV physdev;
 435     COLORREF ret;
 436     DC * dc = get_dc_ptr( hdc );
 437
 438     if (!dc) return 0;
 439     update_dc( dc );
 440     physdev = GET_DC_PHYSDEV( dc, pSetPixel );
 441     ret = physdev->funcs->pSetPixel( physdev, x, y, color );
 442     release_dc_ptr( dc );
 443     return ret;
 444 }
 445
 446 /***********************************************************************
 447  *           SetPixelV    (GDI32.@)
 448  */
 449 BOOL WINAPI SetPixelV( HDC hdc, INT x, INT y, COLORREF color )
 450 {
 451     PHYSDEV physdev;
 452     DC * dc = get_dc_ptr( hdc );
 453
 454     if (!dc) return FALSE;
 455     update_dc( dc );
 456     physdev = GET_DC_PHYSDEV( dc, pSetPixel );
 457     physdev->funcs->pSetPixel( physdev, x, y, color );
 458     release_dc_ptr( dc );
 459     return TRUE;
 460 }
 461
 462 /***********************************************************************
 463  *           GetPixel    (GDI32.@)
 464  */
 465 COLORREF WINAPI GetPixel( HDC hdc, INT x, INT y )
 466 {
 467     PHYSDEV physdev;
 468     COLORREF ret;
 469     DC * dc = get_dc_ptr( hdc );
 470
 471     if (!dc) return CLR_INVALID;
 472     update_dc( dc );
 473     physdev = GET_DC_PHYSDEV( dc, pGetPixel );
 474     ret = physdev->funcs->pGetPixel( physdev, x, y );
 475     release_dc_ptr( dc );
 476     return ret;
 477 }
 478
 479
 480 /******************************************************************************
 481  * GdiSetPixelFormat [GDI32.@]
 482  *
 483  * Probably not the correct semantics, it's supposed to be an internal backend for SetPixelFormat.
 484  */
 485 BOOL WINAPI GdiSetPixelFormat( HDC hdc, INT format, const PIXELFORMATDESCRIPTOR *descr )
 486 {
 487     DC *dc;
 488     BOOL ret = TRUE;
 489
 490     TRACE("(%p,%d,%p)\n", hdc, format, descr);
 491
 492     if (!(dc = get_dc_ptr( hdc ))) return FALSE;
 493
 494     if (!dc->pixel_format) dc->pixel_format = format;
 495     else ret = (dc->pixel_format == format);
 496     release_dc_ptr( dc );
 497     return ret;
 498 }
 499
 500
 501 /******************************************************************************
 502  * GdiDescribePixelFormat [GDI32.@]
 503  *
 504  * Probably not the correct semantics, it's supposed to be an internal backend for DescribePixelFormat.
 505  */
 506 INT WINAPI GdiDescribePixelFormat( HDC hdc, INT format, UINT size, PIXELFORMATDESCRIPTOR *descr )
 507 {
 508     FIXME( "(%p,%d,%d,%p): stub\n", hdc, format, size, descr );
 509     return 0;
 510 }
 511
 512
 513 /******************************************************************************
 514  * GdiSwapBuffers [GDI32.@]
 515  *
 516  * Probably not the correct semantics, it's supposed to be an internal backend for SwapBuffers.
 517  */
 518 BOOL WINAPI GdiSwapBuffers( HDC hdc )
 519 {
 520     FIXME( "(%p): stub\n", hdc );
 521     return FALSE;
 522 }
 523
 524
 525 /***********************************************************************
 526  *           PaintRgn    (GDI32.@)
 527  */
 528 BOOL WINAPI PaintRgn( HDC hdc, HRGN hrgn )
 529 {
 530     PHYSDEV physdev;
 531     BOOL ret;
 532     DC * dc = get_dc_ptr( hdc );
 533
 534     if (!dc) return FALSE;
 535     update_dc( dc );
 536     physdev = GET_DC_PHYSDEV( dc, pPaintRgn );
 537     ret = physdev->funcs->pPaintRgn( physdev, hrgn );
 538     release_dc_ptr( dc );
 539     return ret;
 540 }
 541
 542
 543 /***********************************************************************
 544  *           FillRgn    (GDI32.@)
 545  */
 546 BOOL WINAPI FillRgn( HDC hdc, HRGN hrgn, HBRUSH hbrush )
 547 {
 548     PHYSDEV physdev;
 549     BOOL retval;
 550     DC * dc = get_dc_ptr( hdc );
 551
 552     if (!dc) return FALSE;
 553     update_dc( dc );
 554     physdev = GET_DC_PHYSDEV( dc, pFillRgn );
 555     retval = physdev->funcs->pFillRgn( physdev, hrgn, hbrush );
 556     release_dc_ptr( dc );
 557     return retval;
 558 }
 559
 560
 561 /***********************************************************************
 562  *           FrameRgn     (GDI32.@)
 563  */
 564 BOOL WINAPI FrameRgn( HDC hdc, HRGN hrgn, HBRUSH hbrush,
 565                           INT nWidth, INT nHeight )
 566 {
 567     PHYSDEV physdev;
 568     BOOL ret;
 569     DC *dc = get_dc_ptr( hdc );
 570
 571     if (!dc) return FALSE;
 572     update_dc( dc );
 573     physdev = GET_DC_PHYSDEV( dc, pFrameRgn );
 574     ret = physdev->funcs->pFrameRgn( physdev, hrgn, hbrush, nWidth, nHeight );
 575     release_dc_ptr( dc );
 576     return ret;
 577 }
 578
 579
 580 /***********************************************************************
 581  *           InvertRgn    (GDI32.@)
 582  */
 583 BOOL WINAPI InvertRgn( HDC hdc, HRGN hrgn )
 584 {
 585     PHYSDEV physdev;
 586     BOOL ret;
 587     DC *dc = get_dc_ptr( hdc );
 588
 589     if (!dc) return FALSE;
 590     update_dc( dc );
 591     physdev = GET_DC_PHYSDEV( dc, pInvertRgn );
 592     ret = physdev->funcs->pInvertRgn( physdev, hrgn );
 593     release_dc_ptr( dc );
 594     return ret;
 595 }
 596
 597
 598 /**********************************************************************
 599  *          Polyline   (GDI32.@)
 600  */
 601 BOOL WINAPI Polyline( HDC hdc, const POINT* pt, INT count )
 602 {
 603     PHYSDEV physdev;
 604     BOOL ret;
 605     DC * dc = get_dc_ptr( hdc );
 606
 607     if (!dc) return FALSE;
 608     update_dc( dc );
 609     physdev = GET_DC_PHYSDEV( dc, pPolyline );
 610     ret = physdev->funcs->pPolyline( physdev, pt, count );
 611     release_dc_ptr( dc );
 612     return ret;
 613 }
 614
 615 /**********************************************************************
 616  *          PolylineTo   (GDI32.@)
 617  */
 618 BOOL WINAPI PolylineTo( HDC hdc, const POINT* pt, DWORD cCount )
 619 {
 620     DC * dc = get_dc_ptr( hdc );
 621     PHYSDEV physdev;
 622     BOOL ret;
 623
 624     if(!dc) return FALSE;
 625
 626     update_dc( dc );
 627     physdev = GET_DC_PHYSDEV( dc, pPolylineTo );
 628     ret = physdev->funcs->pPolylineTo( physdev, pt, cCount );
 629
 630     if (ret && cCount)
 631     {
 632         dc->CursPosX = pt[cCount-1].x;
 633         dc->CursPosY = pt[cCount-1].y;
 634     }
 635     release_dc_ptr( dc );
 636     return ret;
 637 }
 638
 639
 640 /**********************************************************************
 641  *          Polygon  (GDI32.@)
 642  */
 643 BOOL WINAPI Polygon( HDC hdc, const POINT* pt, INT count )
 644 {
 645     PHYSDEV physdev;
 646     BOOL ret;
 647     DC * dc = get_dc_ptr( hdc );
 648
 649     if (!dc) return FALSE;
 650     update_dc( dc );
 651     physdev = GET_DC_PHYSDEV( dc, pPolygon );
 652     ret = physdev->funcs->pPolygon( physdev, pt, count );
 653     release_dc_ptr( dc );
 654     return ret;
 655 }
 656
 657
 658 /**********************************************************************
 659  *          PolyPolygon  (GDI32.@)
 660  */
 661 BOOL WINAPI PolyPolygon( HDC hdc, const POINT* pt, const INT* counts,
 662                              UINT polygons )
 663 {
 664     PHYSDEV physdev;
 665     BOOL ret;
 666     DC * dc = get_dc_ptr( hdc );
 667
 668     if (!dc) return FALSE;
 669     update_dc( dc );
 670     physdev = GET_DC_PHYSDEV( dc, pPolyPolygon );
 671     ret = physdev->funcs->pPolyPolygon( physdev, pt, counts, polygons );
 672     release_dc_ptr( dc );
 673     return ret;
 674 }
 675
 676 /**********************************************************************
 677  *          PolyPolyline  (GDI32.@)
 678  */
 679 BOOL WINAPI PolyPolyline( HDC hdc, const POINT* pt, const DWORD* counts,
 680                             DWORD polylines )
 681 {
 682     PHYSDEV physdev;
 683     BOOL ret;
 684     DC * dc = get_dc_ptr( hdc );
 685
 686     if (!dc) return FALSE;
 687     update_dc( dc );
 688     physdev = GET_DC_PHYSDEV( dc, pPolyPolyline );
 689     ret = physdev->funcs->pPolyPolyline( physdev, pt, counts, polylines );
 690     release_dc_ptr( dc );
 691     return ret;
 692 }
 693
 694 /**********************************************************************
 695  *          ExtFloodFill   (GDI32.@)
 696  */
 697 BOOL WINAPI ExtFloodFill( HDC hdc, INT x, INT y, COLORREF color,
 698                               UINT fillType )
 699 {
 700     PHYSDEV physdev;
 701     BOOL ret;
 702     DC * dc = get_dc_ptr( hdc );
 703
 704     if (!dc) return FALSE;
 705     update_dc( dc );
 706     physdev = GET_DC_PHYSDEV( dc, pExtFloodFill );
 707     ret = physdev->funcs->pExtFloodFill( physdev, x, y, color, fillType );
 708     release_dc_ptr( dc );
 709     return ret;
 710 }
 711
 712
 713 /**********************************************************************
 714  *          FloodFill   (GDI32.@)
 715  */
 716 BOOL WINAPI FloodFill( HDC hdc, INT x, INT y, COLORREF color )
 717 {
 718     return ExtFloodFill( hdc, x, y, color, FLOODFILLBORDER );
 719 }
 720
 721
 722 /******************************************************************************
 723  * PolyBezier [GDI32.@]
 724  * Draws one or more Bezier curves
 725  *
 726  * PARAMS
 727  *    hDc     [I] Handle to device context
 728  *    lppt    [I] Pointer to endpoints and control points
 729  *    cPoints [I] Count of endpoints and control points
 730  *
 731  * RETURNS
 732  *    Success: TRUE
 733  *    Failure: FALSE
 734  */
 735 BOOL WINAPI PolyBezier( HDC hdc, const POINT* lppt, DWORD cPoints )
 736 {
 737     PHYSDEV physdev;
 738     BOOL ret;
 739     DC * dc;
 740
 741     /* cPoints must be 3 * n + 1 (where n>=1) */
 742     if (cPoints == 1 || (cPoints % 3) != 1) return FALSE;
 743
 744     dc = get_dc_ptr( hdc );
 745     if(!dc) return FALSE;
 746
 747     update_dc( dc );
 748     physdev = GET_DC_PHYSDEV( dc, pPolyBezier );
 749     ret = physdev->funcs->pPolyBezier( physdev, lppt, cPoints );
 750     release_dc_ptr( dc );
 751     return ret;
 752 }
 753
 754 /******************************************************************************
 755  * PolyBezierTo [GDI32.@]
 756  * Draws one or more Bezier curves
 757  *
 758  * PARAMS
 759  *    hDc     [I] Handle to device context
 760  *    lppt    [I] Pointer to endpoints and control points
 761  *    cPoints [I] Count of endpoints and control points
 762  *
 763  * RETURNS
 764  *    Success: TRUE
 765  *    Failure: FALSE
 766  */
 767 BOOL WINAPI PolyBezierTo( HDC hdc, const POINT* lppt, DWORD cPoints )
 768 {
 769     DC * dc;
 770     BOOL ret;
 771     PHYSDEV physdev;
 772
 773     /* cbPoints must be 3 * n (where n>=1) */
 774     if (!cPoints || (cPoints % 3) != 0) return FALSE;
 775
 776     dc = get_dc_ptr( hdc );
 777     if(!dc) return FALSE;
 778
 779     update_dc( dc );
 780     physdev = GET_DC_PHYSDEV( dc, pPolyBezierTo );
 781     ret = physdev->funcs->pPolyBezierTo( physdev, lppt, cPoints );
 782
 783     if(ret) {
 784         dc->CursPosX = lppt[cPoints-1].x;
 785         dc->CursPosY = lppt[cPoints-1].y;
 786     }
 787     release_dc_ptr( dc );
 788     return ret;
 789 }
 790
 791 /***********************************************************************
 792  *      AngleArc (GDI32.@)
 793  */
 794 BOOL WINAPI AngleArc(HDC hdc, INT x, INT y, DWORD dwRadius, FLOAT eStartAngle, FLOAT eSweepAngle)
 795 {
 796     PHYSDEV physdev;
 797     BOOL result;
 798     DC *dc;
 799
 800     if( (signed int)dwRadius < 0 )
 801         return FALSE;
 802
 803     dc = get_dc_ptr( hdc );
 804     if(!dc) return FALSE;
 805
 806     update_dc( dc );
 807     physdev = GET_DC_PHYSDEV( dc, pAngleArc );
 808     result = physdev->funcs->pAngleArc( physdev, x, y, dwRadius, eStartAngle, eSweepAngle );
 809
 810     if (result) {
 811         dc->CursPosX = GDI_ROUND( x + cos((eStartAngle+eSweepAngle)*M_PI/180) * dwRadius );
 812         dc->CursPosY = GDI_ROUND( y - sin((eStartAngle+eSweepAngle)*M_PI/180) * dwRadius );
 813     }
 814     release_dc_ptr( dc );
 815     return result;
 816 }
 817
 818 /***********************************************************************
 819  *      PolyDraw (GDI32.@)
 820  */
 821 BOOL WINAPI PolyDraw(HDC hdc, const POINT *lppt, const BYTE *lpbTypes,
 822                        DWORD cCount)
 823 {
 824     DC *dc = get_dc_ptr( hdc );
 825     PHYSDEV physdev;
 826     BOOL result;
 827
 828     if(!dc) return FALSE;
 829
 830     update_dc( dc );
 831     physdev = GET_DC_PHYSDEV( dc, pPolyDraw );
 832     result = physdev->funcs->pPolyDraw( physdev, lppt, lpbTypes, cCount );
 833     release_dc_ptr( dc );
 834     return result;
 835 }
 836
 837
 838 /**********************************************************************
 839  *           LineDDA   (GDI32.@)
 840  */
 841 BOOL WINAPI LineDDA(INT nXStart, INT nYStart, INT nXEnd, INT nYEnd,
 842                     LINEDDAPROC callback, LPARAM lParam )
 843 {
 844     INT xadd = 1, yadd = 1;
 845     INT err,erradd;
 846     INT cnt;
 847     INT dx = nXEnd - nXStart;
 848     INT dy = nYEnd - nYStart;
 849
 850     if (dx < 0)
 851     {
 852         dx = -dx;
 853         xadd = -1;
 854     }
 855     if (dy < 0)
 856     {
 857         dy = -dy;
 858         yadd = -1;
 859     }
 860     if (dx > dy)  /* line is "more horizontal" */
 861     {
 862         err = 2*dy - dx; erradd = 2*dy - 2*dx;
 863         for(cnt = 0;cnt < dx; cnt++)
 864         {
 865             callback(nXStart,nYStart,lParam);
 866             if (err > 0)
 867             {
 868                 nYStart += yadd;
 869                 err += erradd;
 870             }
 871             else err += 2*dy;
 872             nXStart += xadd;
 873         }
 874     }
 875     else   /* line is "more vertical" */
 876     {
 877         err = 2*dx - dy; erradd = 2*dx - 2*dy;
 878         for(cnt = 0;cnt < dy; cnt++)
 879         {
 880             callback(nXStart,nYStart,lParam);
 881             if (err > 0)
 882             {
 883                 nXStart += xadd;
 884                 err += erradd;
 885             }
 886             else err += 2*dx;
 887             nYStart += yadd;
 888         }
 889     }
 890     return TRUE;
 891 }
 892
 893
 894 /******************************************************************
 895  *
 896  *   *Very* simple bezier drawing code,
 897  *
 898  *   It uses a recursive algorithm to divide the curve in a series
 899  *   of straight line segments. Not ideal but sufficient for me.
 900  *   If you are in need for something better look for some incremental
 901  *   algorithm.
 902  *
 903  *   7 July 1998 Rein Klazes
 904  */
 905
 906  /*
 907   * some macro definitions for bezier drawing
 908   *
 909   * to avoid truncation errors the coordinates are
 910   * shifted upwards. When used in drawing they are
 911   * shifted down again, including correct rounding
 912   * and avoiding floating point arithmetic
 913   * 4 bits should allow 27 bits coordinates which I saw
 914   * somewhere in the win32 doc's
 915   *
 916   */
 917
 918 #define BEZIERSHIFTBITS 4
 919 #define BEZIERSHIFTUP(x)    ((x)<<BEZIERSHIFTBITS)
 920 #define BEZIERPIXEL        BEZIERSHIFTUP(1)
 921 #define BEZIERSHIFTDOWN(x)  (((x)+(1<<(BEZIERSHIFTBITS-1)))>>BEZIERSHIFTBITS)
 922 /* maximum depth of recursion */
 923 #define BEZIERMAXDEPTH  8
 924
 925 /* size of array to store points on */
 926 /* enough for one curve */
 927 #define BEZIER_INITBUFSIZE    (150)
 928
 929 /* calculate Bezier average, in this case the middle
 930  * correctly rounded...
 931  * */
 932
 933 #define BEZIERMIDDLE(Mid, P1, P2) \
 934     (Mid).x=((P1).x+(P2).x + 1)/2;\
 935     (Mid).y=((P1).y+(P2).y + 1)/2;
 936
 937 /**********************************************************
 938 * BezierCheck helper function to check
 939 * that recursion can be terminated
 940 *       Points[0] and Points[3] are begin and endpoint
 941 *       Points[1] and Points[2] are control points
 942 *       level is the recursion depth
 943 *       returns true if the recursion can be terminated
 944 */
 945 static BOOL BezierCheck( int level, POINT *Points)
 946 {
 947     INT dx, dy;
 948     dx=Points[3].x-Points[0].x;
 949     dy=Points[3].y-Points[0].y;
 950     if(abs(dy)<=abs(dx)){/* shallow line */
 951         /* check that control points are between begin and end */
 952         if(Points[1].x < Points[0].x){
 953             if(Points[1].x < Points[3].x)
 954                 return FALSE;
 955         }else
 956             if(Points[1].x > Points[3].x)
 957                 return FALSE;
 958         if(Points[2].x < Points[0].x){
 959             if(Points[2].x < Points[3].x)
 960                 return FALSE;
 961         }else
 962             if(Points[2].x > Points[3].x)
 963                 return FALSE;
 964         dx=BEZIERSHIFTDOWN(dx);
 965         if(!dx) return TRUE;
 966         if(abs(Points[1].y-Points[0].y-(dy/dx)*
 967                 BEZIERSHIFTDOWN(Points[1].x-Points[0].x)) > BEZIERPIXEL ||
 968            abs(Points[2].y-Points[0].y-(dy/dx)*
 969                    BEZIERSHIFTDOWN(Points[2].x-Points[0].x)) > BEZIERPIXEL )
 970             return FALSE;
 971         else
 972             return TRUE;
 973     }else{ /* steep line */
 974         /* check that control points are between begin and end */
 975         if(Points[1].y < Points[0].y){
 976             if(Points[1].y < Points[3].y)
 977                 return FALSE;
 978         }else
 979             if(Points[1].y > Points[3].y)
 980                 return FALSE;
 981         if(Points[2].y < Points[0].y){
 982             if(Points[2].y < Points[3].y)
 983                 return FALSE;
 984         }else
 985             if(Points[2].y > Points[3].y)
 986                 return FALSE;
 987         dy=BEZIERSHIFTDOWN(dy);
 988         if(!dy) return TRUE;
 989         if(abs(Points[1].x-Points[0].x-(dx/dy)*
 990                 BEZIERSHIFTDOWN(Points[1].y-Points[0].y)) > BEZIERPIXEL ||
 991            abs(Points[2].x-Points[0].x-(dx/dy)*
 992                    BEZIERSHIFTDOWN(Points[2].y-Points[0].y)) > BEZIERPIXEL )
 993             return FALSE;
 994         else
 995             return TRUE;
 996     }
 997 }
 998
 999 /* Helper for GDI_Bezier.
1000  * Just handles one Bezier, so Points should point to four POINTs
1001  */
1002 static void GDI_InternalBezier( POINT *Points, POINT **PtsOut, INT *dwOut,
1003                                 INT *nPtsOut, INT level )
1004 {
1005     if(*nPtsOut == *dwOut) {
1006         *dwOut *= 2;
1007         *PtsOut = HeapReAlloc( GetProcessHeap(), 0, *PtsOut,
1008                                *dwOut * sizeof(POINT) );
1009     }
1010
1011     if(!level || BezierCheck(level, Points)) {
1012         if(*nPtsOut == 0) {
1013             (*PtsOut)[0].x = BEZIERSHIFTDOWN(Points[0].x);
1014             (*PtsOut)[0].y = BEZIERSHIFTDOWN(Points[0].y);
1015             *nPtsOut = 1;
1016         }
1017         (*PtsOut)[*nPtsOut].x = BEZIERSHIFTDOWN(Points[3].x);
1018         (*PtsOut)[*nPtsOut].y = BEZIERSHIFTDOWN(Points[3].y);
1019         (*nPtsOut) ++;
1020     } else {
1021         POINT Points2[4]; /* for the second recursive call */
1022         Points2[3]=Points[3];
1023         BEZIERMIDDLE(Points2[2], Points[2], Points[3]);
1024         BEZIERMIDDLE(Points2[0], Points[1], Points[2]);
1025         BEZIERMIDDLE(Points2[1],Points2[0],Points2[2]);
1026
1027         BEZIERMIDDLE(Points[1], Points[0],  Points[1]);
1028         BEZIERMIDDLE(Points[2], Points[1], Points2[0]);
1029         BEZIERMIDDLE(Points[3], Points[2], Points2[1]);
1030
1031         Points2[0]=Points[3];
1032
1033         /* do the two halves */
1034         GDI_InternalBezier(Points, PtsOut, dwOut, nPtsOut, level-1);
1035         GDI_InternalBezier(Points2, PtsOut, dwOut, nPtsOut, level-1);
1036     }
1037 }
1038
1039
1040
1041 /***********************************************************************
1042  *           GDI_Bezier   [INTERNAL]
1043  *   Calculate line segments that approximate -what microsoft calls- a bezier
1044  *   curve.
1045  *   The routine recursively divides the curve in two parts until a straight
1046  *   line can be drawn
1047  *
1048  *  PARAMS
1049  *
1050  *  Points  [I] Ptr to count POINTs which are the end and control points
1051  *              of the set of Bezier curves to flatten.
1052  *  count   [I] Number of Points.  Must be 3n+1.
1053  *  nPtsOut [O] Will contain no of points that have been produced (i.e. no. of
1054  *              lines+1).
1055  *
1056  *  RETURNS
1057  *
1058  *  Ptr to an array of POINTs that contain the lines that approximate the
1059  *  Beziers.  The array is allocated on the process heap and it is the caller's
1060  *  responsibility to HeapFree it. [this is not a particularly nice interface
1061  *  but since we can't know in advance how many points we will generate, the
1062  *  alternative would be to call the function twice, once to determine the size
1063  *  and a second time to do the work - I decided this was too much of a pain].
1064  */
1065 POINT *GDI_Bezier( const POINT *Points, INT count, INT *nPtsOut )
1066 {
1067     POINT *out;
1068     INT Bezier, dwOut = BEZIER_INITBUFSIZE, i;
1069
1070     if (count == 1 || (count - 1) % 3 != 0) {
1071         ERR("Invalid no. of points %d\n", count);
1072         return NULL;
1073     }
1074     *nPtsOut = 0;
1075     out = HeapAlloc( GetProcessHeap(), 0, dwOut * sizeof(POINT));
1076     for(Bezier = 0; Bezier < (count-1)/3; Bezier++) {
1077         POINT ptBuf[4];
1078         memcpy(ptBuf, Points + Bezier * 3, sizeof(POINT) * 4);
1079         for(i = 0; i < 4; i++) {
1080             ptBuf[i].x = BEZIERSHIFTUP(ptBuf[i].x);
1081             ptBuf[i].y = BEZIERSHIFTUP(ptBuf[i].y);
1082         }
1083         GDI_InternalBezier( ptBuf, &out, &dwOut, nPtsOut, BEZIERMAXDEPTH );
1084     }
1085     TRACE("Produced %d points\n", *nPtsOut);
1086     return out;
1087 }
1088
1089 /******************************************************************************
1090  *           GdiGradientFill   (GDI32.@)
1091  */
1092 BOOL WINAPI GdiGradientFill( HDC hdc, TRIVERTEX *vert_array, ULONG nvert,
1093                              void *grad_array, ULONG ngrad, ULONG mode )
1094 {
1095     DC *dc;
1096     PHYSDEV physdev;
1097     BOOL ret;
1098     ULONG i;
1099
1100     TRACE("%p vert_array:%p nvert:%d grad_array:%p ngrad:%d\n", hdc, vert_array, nvert, grad_array, ngrad);
1101
1102     if (!vert_array || !nvert || !grad_array || !ngrad || mode > GRADIENT_FILL_TRIANGLE)
1103     {
1104         SetLastError( ERROR_INVALID_PARAMETER );
1105         return FALSE;
1106     }
1107     for (i = 0; i < ngrad * (mode == GRADIENT_FILL_TRIANGLE ? 3 : 2); i++)
1108         if (((ULONG *)grad_array)[i] >= nvert) return FALSE;
1109
1110     if (!(dc = get_dc_ptr( hdc )))
1111     {
1112         SetLastError( ERROR_INVALID_PARAMETER );
1113         return FALSE;
1114     }
1115     update_dc( dc );
1116     physdev = GET_DC_PHYSDEV( dc, pGradientFill );
1117     ret = physdev->funcs->pGradientFill( physdev, vert_array, nvert, grad_array, ngrad, mode );
1118     release_dc_ptr( dc );
1119     return ret;
1120 }
1121
1122 /******************************************************************************
1123  *           GdiDrawStream   (GDI32.@)
1124  *
1125  */
1126 BOOL WINAPI GdiDrawStream( HDC hdc, ULONG in, void * pvin )
1127 {
1128     FIXME("stub: %p, %d, %p\n", hdc, in, pvin);
1129     return FALSE;
1130 }