2 * GDI drawing functions.
4 * Copyright 1993, 1994 Alexandre Julliard
5 * Copyright 1997 Bertho A. Stultiens
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.
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.
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
24 #include "wine/port.h"
34 #include "gdi_private.h"
35 #include "wine/debug.h"
37 WINE_DEFAULT_DEBUG_CHANNEL(gdi);
40 /***********************************************************************
41 * null driver fallback implementations
44 BOOL nulldrv_AngleArc( PHYSDEV dev, INT x, INT y, DWORD radius, FLOAT start, FLOAT sweep )
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 );
56 BOOL nulldrv_ArcTo( PHYSDEV dev, INT left, INT top, INT right, INT bottom,
57 INT xstart, INT ystart, INT xend, INT yend )
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;
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 );
75 BOOL nulldrv_FillRgn( PHYSDEV dev, HRGN rgn, HBRUSH brush )
80 if ((prev = SelectObject( dev->hdc, brush )))
82 ret = PaintRgn( dev->hdc, rgn );
83 SelectObject( dev->hdc, prev );
88 BOOL nulldrv_FrameRgn( PHYSDEV dev, HRGN rgn, HBRUSH brush, INT width, INT height )
91 HRGN tmp = CreateRectRgn( 0, 0, 0, 0 );
95 if (REGION_FrameRgn( tmp, rgn, width, height )) ret = FillRgn( dev->hdc, tmp, brush );
101 BOOL nulldrv_InvertRgn( PHYSDEV dev, HRGN rgn )
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 );
111 BOOL nulldrv_PolyBezier( PHYSDEV dev, const POINT *points, DWORD count )
117 if ((pts = GDI_Bezier( points, count, &n )))
119 ret = Polyline( dev->hdc, pts, n );
120 HeapFree( GetProcessHeap(), 0, pts );
125 BOOL nulldrv_PolyBezierTo( PHYSDEV dev, const POINT *points, DWORD count )
128 POINT *pts = HeapAlloc( GetProcessHeap(), 0, sizeof(POINT) * (count + 1) );
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 );
140 BOOL nulldrv_PolyDraw( PHYSDEV dev, const POINT *points, const BYTE *types, DWORD count )
142 POINT *line_pts = NULL, *bzr_pts = NULL, bzr[4];
143 INT i, num_pts, num_bzr_pts, space, size;
145 /* check for valid point types */
146 for (i = 0; i < count; i++)
151 case PT_LINETO | PT_CLOSEFIGURE:
155 if((i + 2 < count) && (types[i + 1] == PT_BEZIERTO) &&
156 ((types[i + 2] & ~PT_CLOSEFIGURE) == PT_BEZIERTO))
167 line_pts = HeapAlloc( GetProcessHeap(), 0, space * sizeof(POINT) );
170 GetCurrentPositionEx( dev->hdc, &line_pts[0] );
171 for (i = 0; i < count; i++)
176 if (num_pts >= 2) Polyline( dev->hdc, line_pts, num_pts );
178 line_pts[num_pts++] = points[i];
181 case (PT_LINETO | PT_CLOSEFIGURE):
182 line_pts[num_pts++] = points[i];
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) );
189 if ((bzr_pts = GDI_Bezier( bzr, 4, &num_bzr_pts )))
191 size = num_pts + (count - i) + num_bzr_pts;
195 line_pts = HeapReAlloc( GetProcessHeap(), 0, line_pts, space * sizeof(POINT) );
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 );
204 if (types[i] & PT_CLOSEFIGURE) line_pts[num_pts++] = line_pts[0];
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 );
213 BOOL nulldrv_PolylineTo( PHYSDEV dev, const POINT *points, INT count )
218 if (!count) return FALSE;
219 if ((pts = HeapAlloc( GetProcessHeap(), 0, sizeof(POINT) * (count + 1) )))
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 );
229 /***********************************************************************
232 BOOL WINAPI LineTo( HDC hdc, INT x, INT y )
234 DC * dc = get_dc_ptr( hdc );
237 if(!dc) return FALSE;
240 if(PATH_IsPathOpen(dc->path))
241 ret = PATH_LineTo(dc, x, y);
244 PHYSDEV physdev = GET_DC_PHYSDEV( dc, pLineTo );
245 ret = physdev->funcs->pLineTo( physdev, x, y );
251 release_dc_ptr( dc );
256 /***********************************************************************
259 BOOL WINAPI MoveToEx( HDC hdc, INT x, INT y, LPPOINT pt )
262 DC * dc = get_dc_ptr( hdc );
264 if(!dc) return FALSE;
267 pt->x = dc->CursPosX;
268 pt->y = dc->CursPosY;
273 if(PATH_IsPathOpen(dc->path)) ret = PATH_MoveTo(dc);
276 PHYSDEV physdev = GET_DC_PHYSDEV( dc, pMoveTo );
277 ret = physdev->funcs->pMoveTo( physdev, x, y );
279 release_dc_ptr( dc );
284 /***********************************************************************
287 BOOL WINAPI Arc( HDC hdc, INT left, INT top, INT right,
288 INT bottom, INT xstart, INT ystart,
292 DC * dc = get_dc_ptr( hdc );
297 if(PATH_IsPathOpen(dc->path))
298 ret = PATH_Arc(dc, left, top, right, bottom, xstart, ystart, xend, yend,0);
301 PHYSDEV physdev = GET_DC_PHYSDEV( dc, pArc );
302 ret = physdev->funcs->pArc( physdev, left, top, right, bottom, xstart, ystart, xend, yend );
304 release_dc_ptr( dc );
309 /***********************************************************************
312 BOOL WINAPI ArcTo( HDC hdc,
314 INT right, INT bottom,
315 INT xstart, INT ystart,
318 double width = fabs(right-left),
319 height = fabs(bottom-top),
322 xcenter = right > left ? left+xradius : right+xradius,
323 ycenter = bottom > top ? top+yradius : bottom+yradius,
326 DC * dc = get_dc_ptr( hdc );
327 if(!dc) return FALSE;
330 if(PATH_IsPathOpen(dc->path))
331 result = PATH_Arc(dc,left,top,right,bottom,xstart,ystart,xend,yend,-1);
334 PHYSDEV physdev = GET_DC_PHYSDEV( dc, pArcTo );
335 result = physdev->funcs->pArcTo( physdev, left, top, right, bottom, xstart, ystart, xend, yend );
338 angle = atan2(((yend-ycenter)/height),
339 ((xend-xcenter)/width));
340 dc->CursPosX = GDI_ROUND(xcenter+(cos(angle)*xradius));
341 dc->CursPosY = GDI_ROUND(ycenter+(sin(angle)*yradius));
343 release_dc_ptr( dc );
348 /***********************************************************************
351 BOOL WINAPI Pie( HDC hdc, INT left, INT top,
352 INT right, INT bottom, INT xstart, INT ystart,
356 DC * dc = get_dc_ptr( hdc );
357 if (!dc) return FALSE;
360 if(PATH_IsPathOpen(dc->path))
361 ret = PATH_Arc(dc,left,top,right,bottom,xstart,ystart,xend,yend,2);
364 PHYSDEV physdev = GET_DC_PHYSDEV( dc, pPie );
365 ret = physdev->funcs->pPie( physdev, left, top, right, bottom, xstart, ystart, xend, yend );
367 release_dc_ptr( dc );
372 /***********************************************************************
375 BOOL WINAPI Chord( HDC hdc, INT left, INT top,
376 INT right, INT bottom, INT xstart, INT ystart,
380 DC * dc = get_dc_ptr( hdc );
381 if (!dc) return FALSE;
384 if(PATH_IsPathOpen(dc->path))
385 ret = PATH_Arc(dc,left,top,right,bottom,xstart,ystart,xend,yend,1);
388 PHYSDEV physdev = GET_DC_PHYSDEV( dc, pChord );
389 ret = physdev->funcs->pChord( physdev, left, top, right, bottom, xstart, ystart, xend, yend );
391 release_dc_ptr( dc );
396 /***********************************************************************
399 BOOL WINAPI Ellipse( HDC hdc, INT left, INT top,
400 INT right, INT bottom )
403 DC * dc = get_dc_ptr( hdc );
404 if (!dc) return FALSE;
407 if(PATH_IsPathOpen(dc->path))
408 ret = PATH_Ellipse(dc,left,top,right,bottom);
411 PHYSDEV physdev = GET_DC_PHYSDEV( dc, pEllipse );
412 ret = physdev->funcs->pEllipse( physdev, left, top, right, bottom );
415 release_dc_ptr( dc );
420 /***********************************************************************
421 * Rectangle (GDI32.@)
423 BOOL WINAPI Rectangle( HDC hdc, INT left, INT top,
424 INT right, INT bottom )
427 DC * dc = get_dc_ptr( hdc );
432 if(PATH_IsPathOpen(dc->path))
433 ret = PATH_Rectangle(dc, left, top, right, bottom);
436 PHYSDEV physdev = GET_DC_PHYSDEV( dc, pRectangle );
437 ret = physdev->funcs->pRectangle( physdev, left, top, right, bottom );
439 release_dc_ptr( dc );
445 /***********************************************************************
446 * RoundRect (GDI32.@)
448 BOOL WINAPI RoundRect( HDC hdc, INT left, INT top, INT right,
449 INT bottom, INT ell_width, INT ell_height )
452 DC *dc = get_dc_ptr( hdc );
457 if(PATH_IsPathOpen(dc->path))
458 ret = PATH_RoundRect(dc,left,top,right,bottom,ell_width,ell_height);
461 PHYSDEV physdev = GET_DC_PHYSDEV( dc, pRoundRect );
462 ret = physdev->funcs->pRoundRect( physdev, left, top, right, bottom, ell_width, ell_height );
464 release_dc_ptr( dc );
469 /***********************************************************************
472 COLORREF WINAPI SetPixel( HDC hdc, INT x, INT y, COLORREF color )
475 DC * dc = get_dc_ptr( hdc );
479 PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetPixel );
481 ret = physdev->funcs->pSetPixel( physdev, x, y, color );
482 release_dc_ptr( dc );
487 /***********************************************************************
488 * SetPixelV (GDI32.@)
490 BOOL WINAPI SetPixelV( HDC hdc, INT x, INT y, COLORREF color )
493 DC * dc = get_dc_ptr( hdc );
497 PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetPixel );
499 physdev->funcs->pSetPixel( physdev, x, y, color );
501 release_dc_ptr( dc );
506 /***********************************************************************
509 COLORREF WINAPI GetPixel( HDC hdc, INT x, INT y )
511 COLORREF ret = CLR_INVALID;
512 DC * dc = get_dc_ptr( hdc );
517 /* FIXME: should this be in the graphics driver? */
518 if (PtVisible( hdc, x, y ))
520 PHYSDEV physdev = GET_DC_PHYSDEV( dc, pGetPixel );
521 ret = physdev->funcs->pGetPixel( physdev, x, y );
523 release_dc_ptr( dc );
529 /******************************************************************************
530 * ChoosePixelFormat [GDI32.@]
531 * Matches a pixel format to given format
534 * hdc [I] Device context to search for best pixel match
535 * ppfd [I] Pixel format for which a match is sought
538 * Success: Pixel format index closest to given format
541 INT WINAPI ChoosePixelFormat( HDC hdc, const PIXELFORMATDESCRIPTOR* ppfd )
544 DC * dc = get_dc_ptr( hdc );
546 TRACE("(%p,%p)\n",hdc,ppfd);
550 PHYSDEV physdev = GET_DC_PHYSDEV( dc, pChoosePixelFormat );
551 ret = physdev->funcs->pChoosePixelFormat( physdev, ppfd );
552 release_dc_ptr( dc );
558 /******************************************************************************
559 * SetPixelFormat [GDI32.@]
560 * Sets pixel format of device context
563 * hdc [I] Device context to search for best pixel match
564 * iPixelFormat [I] Pixel format index
565 * ppfd [I] Pixel format for which a match is sought
571 BOOL WINAPI SetPixelFormat( HDC hdc, INT iPixelFormat,
572 const PIXELFORMATDESCRIPTOR *ppfd)
575 DC * dc = get_dc_ptr( hdc );
577 TRACE("(%p,%d,%p)\n",hdc,iPixelFormat,ppfd);
581 PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetPixelFormat );
583 bRet = physdev->funcs->pSetPixelFormat( physdev, iPixelFormat, ppfd );
584 release_dc_ptr( dc );
590 /******************************************************************************
591 * GetPixelFormat [GDI32.@]
592 * Gets index of pixel format of DC
595 * hdc [I] Device context whose pixel format index is sought
598 * Success: Currently selected pixel format
601 INT WINAPI GetPixelFormat( HDC hdc )
604 DC * dc = get_dc_ptr( hdc );
610 PHYSDEV physdev = GET_DC_PHYSDEV( dc, pGetPixelFormat );
612 ret = physdev->funcs->pGetPixelFormat( physdev );
613 release_dc_ptr( dc );
619 /******************************************************************************
620 * DescribePixelFormat [GDI32.@]
621 * Gets info about pixel format from DC
624 * hdc [I] Device context
625 * iPixelFormat [I] Pixel format selector
626 * nBytes [I] Size of buffer
627 * ppfd [O] Pointer to structure to receive pixel format data
630 * Success: Maximum pixel format index of the device context
633 INT WINAPI DescribePixelFormat( HDC hdc, INT iPixelFormat, UINT nBytes,
634 LPPIXELFORMATDESCRIPTOR ppfd )
637 DC * dc = get_dc_ptr( hdc );
639 TRACE("(%p,%d,%d,%p): stub\n",hdc,iPixelFormat,nBytes,ppfd);
643 PHYSDEV physdev = GET_DC_PHYSDEV( dc, pDescribePixelFormat );
645 ret = physdev->funcs->pDescribePixelFormat( physdev, iPixelFormat, nBytes, ppfd );
646 release_dc_ptr( dc );
652 /******************************************************************************
653 * SwapBuffers [GDI32.@]
654 * Exchanges front and back buffers of window
657 * hdc [I] Device context whose buffers get swapped
663 BOOL WINAPI SwapBuffers( HDC hdc )
666 DC * dc = get_dc_ptr( hdc );
672 PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSwapBuffers );
674 bRet = physdev->funcs->pSwapBuffers( physdev );
675 release_dc_ptr( dc );
681 /***********************************************************************
684 BOOL WINAPI PaintRgn( HDC hdc, HRGN hrgn )
687 DC * dc = get_dc_ptr( hdc );
691 PHYSDEV physdev = GET_DC_PHYSDEV( dc, pPaintRgn );
693 ret = physdev->funcs->pPaintRgn( physdev, hrgn );
694 release_dc_ptr( dc );
700 /***********************************************************************
703 BOOL WINAPI FillRgn( HDC hdc, HRGN hrgn, HBRUSH hbrush )
706 DC * dc = get_dc_ptr( hdc );
710 PHYSDEV physdev = GET_DC_PHYSDEV( dc, pFillRgn );
712 retval = physdev->funcs->pFillRgn( physdev, hrgn, hbrush );
713 release_dc_ptr( dc );
719 /***********************************************************************
722 BOOL WINAPI FrameRgn( HDC hdc, HRGN hrgn, HBRUSH hbrush,
723 INT nWidth, INT nHeight )
726 DC *dc = get_dc_ptr( hdc );
730 PHYSDEV physdev = GET_DC_PHYSDEV( dc, pFrameRgn );
732 ret = physdev->funcs->pFrameRgn( physdev, hrgn, hbrush, nWidth, nHeight );
733 release_dc_ptr( dc );
739 /***********************************************************************
740 * InvertRgn (GDI32.@)
742 BOOL WINAPI InvertRgn( HDC hdc, HRGN hrgn )
745 DC *dc = get_dc_ptr( hdc );
749 PHYSDEV physdev = GET_DC_PHYSDEV( dc, pInvertRgn );
751 ret = physdev->funcs->pInvertRgn( physdev, hrgn );
752 release_dc_ptr( dc );
758 /**********************************************************************
761 BOOL WINAPI Polyline( HDC hdc, const POINT* pt, INT count )
764 DC * dc = get_dc_ptr( hdc );
769 if (PATH_IsPathOpen(dc->path)) ret = PATH_Polyline(dc, pt, count);
772 PHYSDEV physdev = GET_DC_PHYSDEV( dc, pPolyline );
773 ret = physdev->funcs->pPolyline( physdev, pt, count );
775 release_dc_ptr( dc );
780 /**********************************************************************
781 * PolylineTo (GDI32.@)
783 BOOL WINAPI PolylineTo( HDC hdc, const POINT* pt, DWORD cCount )
785 DC * dc = get_dc_ptr( hdc );
788 if(!dc) return FALSE;
791 if(PATH_IsPathOpen(dc->path)) ret = PATH_PolylineTo(dc, pt, cCount);
794 PHYSDEV physdev = GET_DC_PHYSDEV( dc, pPolylineTo );
795 ret = physdev->funcs->pPolylineTo( physdev, pt, cCount );
799 dc->CursPosX = pt[cCount-1].x;
800 dc->CursPosY = pt[cCount-1].y;
802 release_dc_ptr( dc );
807 /**********************************************************************
810 BOOL WINAPI Polygon( HDC hdc, const POINT* pt, INT count )
813 DC * dc = get_dc_ptr( hdc );
818 if (PATH_IsPathOpen(dc->path)) ret = PATH_Polygon(dc, pt, count);
821 PHYSDEV physdev = GET_DC_PHYSDEV( dc, pPolygon );
822 ret = physdev->funcs->pPolygon( physdev, pt, count );
824 release_dc_ptr( dc );
830 /**********************************************************************
831 * PolyPolygon (GDI32.@)
833 BOOL WINAPI PolyPolygon( HDC hdc, const POINT* pt, const INT* counts,
837 DC * dc = get_dc_ptr( hdc );
842 if (PATH_IsPathOpen(dc->path)) ret = PATH_PolyPolygon(dc, pt, counts, polygons);
845 PHYSDEV physdev = GET_DC_PHYSDEV( dc, pPolyPolygon );
846 ret = physdev->funcs->pPolyPolygon( physdev, pt, counts, polygons );
848 release_dc_ptr( dc );
853 /**********************************************************************
854 * PolyPolyline (GDI32.@)
856 BOOL WINAPI PolyPolyline( HDC hdc, const POINT* pt, const DWORD* counts,
860 DC * dc = get_dc_ptr( hdc );
865 if (PATH_IsPathOpen(dc->path)) ret = PATH_PolyPolyline(dc, pt, counts, polylines);
868 PHYSDEV physdev = GET_DC_PHYSDEV( dc, pPolyPolyline );
869 ret = physdev->funcs->pPolyPolyline( physdev, pt, counts, polylines );
871 release_dc_ptr( dc );
876 /**********************************************************************
877 * ExtFloodFill (GDI32.@)
879 BOOL WINAPI ExtFloodFill( HDC hdc, INT x, INT y, COLORREF color,
883 DC * dc = get_dc_ptr( hdc );
887 PHYSDEV physdev = GET_DC_PHYSDEV( dc, pExtFloodFill );
890 ret = physdev->funcs->pExtFloodFill( physdev, x, y, color, fillType );
891 release_dc_ptr( dc );
897 /**********************************************************************
898 * FloodFill (GDI32.@)
900 BOOL WINAPI FloodFill( HDC hdc, INT x, INT y, COLORREF color )
902 return ExtFloodFill( hdc, x, y, color, FLOODFILLBORDER );
906 /******************************************************************************
907 * PolyBezier [GDI32.@]
908 * Draws one or more Bezier curves
911 * hDc [I] Handle to device context
912 * lppt [I] Pointer to endpoints and control points
913 * cPoints [I] Count of endpoints and control points
919 BOOL WINAPI PolyBezier( HDC hdc, const POINT* lppt, DWORD cPoints )
924 /* cPoints must be 3 * n + 1 (where n>=1) */
925 if (cPoints == 1 || (cPoints % 3) != 1) return FALSE;
927 dc = get_dc_ptr( hdc );
928 if(!dc) return FALSE;
931 if(PATH_IsPathOpen(dc->path)) ret = PATH_PolyBezier(dc, lppt, cPoints);
934 PHYSDEV physdev = GET_DC_PHYSDEV( dc, pPolyBezier );
935 ret = physdev->funcs->pPolyBezier( physdev, lppt, cPoints );
937 release_dc_ptr( dc );
941 /******************************************************************************
942 * PolyBezierTo [GDI32.@]
943 * Draws one or more Bezier curves
946 * hDc [I] Handle to device context
947 * lppt [I] Pointer to endpoints and control points
948 * cPoints [I] Count of endpoints and control points
954 BOOL WINAPI PolyBezierTo( HDC hdc, const POINT* lppt, DWORD cPoints )
959 /* cbPoints must be 3 * n (where n>=1) */
960 if (!cPoints || (cPoints % 3) != 0) return FALSE;
962 dc = get_dc_ptr( hdc );
963 if(!dc) return FALSE;
966 if(PATH_IsPathOpen(dc->path)) ret = PATH_PolyBezierTo(dc, lppt, cPoints);
969 PHYSDEV physdev = GET_DC_PHYSDEV( dc, pPolyBezierTo );
970 ret = physdev->funcs->pPolyBezierTo( physdev, lppt, cPoints );
973 dc->CursPosX = lppt[cPoints-1].x;
974 dc->CursPosY = lppt[cPoints-1].y;
976 release_dc_ptr( dc );
980 /***********************************************************************
983 BOOL WINAPI AngleArc(HDC hdc, INT x, INT y, DWORD dwRadius, FLOAT eStartAngle, FLOAT eSweepAngle)
985 INT x1,y1,x2,y2, arcdir;
989 if( (signed int)dwRadius < 0 )
992 dc = get_dc_ptr( hdc );
993 if(!dc) return FALSE;
995 /* Calculate the end point */
996 x2 = GDI_ROUND( x + cos((eStartAngle+eSweepAngle)*M_PI/180) * dwRadius );
997 y2 = GDI_ROUND( y - sin((eStartAngle+eSweepAngle)*M_PI/180) * dwRadius );
1000 if(!PATH_IsPathOpen(dc->path))
1002 PHYSDEV physdev = GET_DC_PHYSDEV( dc, pAngleArc );
1003 result = physdev->funcs->pAngleArc( physdev, x, y, dwRadius, eStartAngle, eSweepAngle );
1005 else { /* do it using ArcTo */
1006 x1 = GDI_ROUND( x + cos(eStartAngle*M_PI/180) * dwRadius );
1007 y1 = GDI_ROUND( y - sin(eStartAngle*M_PI/180) * dwRadius );
1009 arcdir = SetArcDirection( hdc, eSweepAngle >= 0 ? AD_COUNTERCLOCKWISE : AD_CLOCKWISE);
1010 result = ArcTo( hdc, x-dwRadius, y-dwRadius, x+dwRadius, y+dwRadius,
1012 SetArcDirection( hdc, arcdir );
1018 release_dc_ptr( dc );
1022 /***********************************************************************
1023 * PolyDraw (GDI32.@)
1025 BOOL WINAPI PolyDraw(HDC hdc, const POINT *lppt, const BYTE *lpbTypes,
1028 DC *dc = get_dc_ptr( hdc );
1029 BOOL result = FALSE;
1031 if(!dc) return FALSE;
1034 if( PATH_IsPathOpen( dc->path ) ) result = PATH_PolyDraw(dc, lppt, lpbTypes, cCount);
1037 PHYSDEV physdev = GET_DC_PHYSDEV( dc, pPolyDraw );
1038 result = physdev->funcs->pPolyDraw( physdev, lppt, lpbTypes, cCount );
1040 release_dc_ptr( dc );
1045 /**********************************************************************
1048 BOOL WINAPI LineDDA(INT nXStart, INT nYStart, INT nXEnd, INT nYEnd,
1049 LINEDDAPROC callback, LPARAM lParam )
1051 INT xadd = 1, yadd = 1;
1054 INT dx = nXEnd - nXStart;
1055 INT dy = nYEnd - nYStart;
1067 if (dx > dy) /* line is "more horizontal" */
1069 err = 2*dy - dx; erradd = 2*dy - 2*dx;
1070 for(cnt = 0;cnt < dx; cnt++)
1072 callback(nXStart,nYStart,lParam);
1082 else /* line is "more vertical" */
1084 err = 2*dx - dy; erradd = 2*dx - 2*dy;
1085 for(cnt = 0;cnt < dy; cnt++)
1087 callback(nXStart,nYStart,lParam);
1101 /******************************************************************
1103 * *Very* simple bezier drawing code,
1105 * It uses a recursive algorithm to divide the curve in a series
1106 * of straight line segments. Not ideal but sufficient for me.
1107 * If you are in need for something better look for some incremental
1110 * 7 July 1998 Rein Klazes
1114 * some macro definitions for bezier drawing
1116 * to avoid truncation errors the coordinates are
1117 * shifted upwards. When used in drawing they are
1118 * shifted down again, including correct rounding
1119 * and avoiding floating point arithmetic
1120 * 4 bits should allow 27 bits coordinates which I saw
1121 * somewhere in the win32 doc's
1125 #define BEZIERSHIFTBITS 4
1126 #define BEZIERSHIFTUP(x) ((x)<<BEZIERSHIFTBITS)
1127 #define BEZIERPIXEL BEZIERSHIFTUP(1)
1128 #define BEZIERSHIFTDOWN(x) (((x)+(1<<(BEZIERSHIFTBITS-1)))>>BEZIERSHIFTBITS)
1129 /* maximum depth of recursion */
1130 #define BEZIERMAXDEPTH 8
1132 /* size of array to store points on */
1133 /* enough for one curve */
1134 #define BEZIER_INITBUFSIZE (150)
1136 /* calculate Bezier average, in this case the middle
1137 * correctly rounded...
1140 #define BEZIERMIDDLE(Mid, P1, P2) \
1141 (Mid).x=((P1).x+(P2).x + 1)/2;\
1142 (Mid).y=((P1).y+(P2).y + 1)/2;
1144 /**********************************************************
1145 * BezierCheck helper function to check
1146 * that recursion can be terminated
1147 * Points[0] and Points[3] are begin and endpoint
1148 * Points[1] and Points[2] are control points
1149 * level is the recursion depth
1150 * returns true if the recursion can be terminated
1152 static BOOL BezierCheck( int level, POINT *Points)
1155 dx=Points[3].x-Points[0].x;
1156 dy=Points[3].y-Points[0].y;
1157 if(abs(dy)<=abs(dx)){/* shallow line */
1158 /* check that control points are between begin and end */
1159 if(Points[1].x < Points[0].x){
1160 if(Points[1].x < Points[3].x)
1163 if(Points[1].x > Points[3].x)
1165 if(Points[2].x < Points[0].x){
1166 if(Points[2].x < Points[3].x)
1169 if(Points[2].x > Points[3].x)
1171 dx=BEZIERSHIFTDOWN(dx);
1172 if(!dx) return TRUE;
1173 if(abs(Points[1].y-Points[0].y-(dy/dx)*
1174 BEZIERSHIFTDOWN(Points[1].x-Points[0].x)) > BEZIERPIXEL ||
1175 abs(Points[2].y-Points[0].y-(dy/dx)*
1176 BEZIERSHIFTDOWN(Points[2].x-Points[0].x)) > BEZIERPIXEL )
1180 }else{ /* steep line */
1181 /* check that control points are between begin and end */
1182 if(Points[1].y < Points[0].y){
1183 if(Points[1].y < Points[3].y)
1186 if(Points[1].y > Points[3].y)
1188 if(Points[2].y < Points[0].y){
1189 if(Points[2].y < Points[3].y)
1192 if(Points[2].y > Points[3].y)
1194 dy=BEZIERSHIFTDOWN(dy);
1195 if(!dy) return TRUE;
1196 if(abs(Points[1].x-Points[0].x-(dx/dy)*
1197 BEZIERSHIFTDOWN(Points[1].y-Points[0].y)) > BEZIERPIXEL ||
1198 abs(Points[2].x-Points[0].x-(dx/dy)*
1199 BEZIERSHIFTDOWN(Points[2].y-Points[0].y)) > BEZIERPIXEL )
1206 /* Helper for GDI_Bezier.
1207 * Just handles one Bezier, so Points should point to four POINTs
1209 static void GDI_InternalBezier( POINT *Points, POINT **PtsOut, INT *dwOut,
1210 INT *nPtsOut, INT level )
1212 if(*nPtsOut == *dwOut) {
1214 *PtsOut = HeapReAlloc( GetProcessHeap(), 0, *PtsOut,
1215 *dwOut * sizeof(POINT) );
1218 if(!level || BezierCheck(level, Points)) {
1220 (*PtsOut)[0].x = BEZIERSHIFTDOWN(Points[0].x);
1221 (*PtsOut)[0].y = BEZIERSHIFTDOWN(Points[0].y);
1224 (*PtsOut)[*nPtsOut].x = BEZIERSHIFTDOWN(Points[3].x);
1225 (*PtsOut)[*nPtsOut].y = BEZIERSHIFTDOWN(Points[3].y);
1228 POINT Points2[4]; /* for the second recursive call */
1229 Points2[3]=Points[3];
1230 BEZIERMIDDLE(Points2[2], Points[2], Points[3]);
1231 BEZIERMIDDLE(Points2[0], Points[1], Points[2]);
1232 BEZIERMIDDLE(Points2[1],Points2[0],Points2[2]);
1234 BEZIERMIDDLE(Points[1], Points[0], Points[1]);
1235 BEZIERMIDDLE(Points[2], Points[1], Points2[0]);
1236 BEZIERMIDDLE(Points[3], Points[2], Points2[1]);
1238 Points2[0]=Points[3];
1240 /* do the two halves */
1241 GDI_InternalBezier(Points, PtsOut, dwOut, nPtsOut, level-1);
1242 GDI_InternalBezier(Points2, PtsOut, dwOut, nPtsOut, level-1);
1248 /***********************************************************************
1249 * GDI_Bezier [INTERNAL]
1250 * Calculate line segments that approximate -what microsoft calls- a bezier
1252 * The routine recursively divides the curve in two parts until a straight
1257 * Points [I] Ptr to count POINTs which are the end and control points
1258 * of the set of Bezier curves to flatten.
1259 * count [I] Number of Points. Must be 3n+1.
1260 * nPtsOut [O] Will contain no of points that have been produced (i.e. no. of
1265 * Ptr to an array of POINTs that contain the lines that approximate the
1266 * Beziers. The array is allocated on the process heap and it is the caller's
1267 * responsibility to HeapFree it. [this is not a particularly nice interface
1268 * but since we can't know in advance how many points we will generate, the
1269 * alternative would be to call the function twice, once to determine the size
1270 * and a second time to do the work - I decided this was too much of a pain].
1272 POINT *GDI_Bezier( const POINT *Points, INT count, INT *nPtsOut )
1275 INT Bezier, dwOut = BEZIER_INITBUFSIZE, i;
1277 if (count == 1 || (count - 1) % 3 != 0) {
1278 ERR("Invalid no. of points %d\n", count);
1282 out = HeapAlloc( GetProcessHeap(), 0, dwOut * sizeof(POINT));
1283 for(Bezier = 0; Bezier < (count-1)/3; Bezier++) {
1285 memcpy(ptBuf, Points + Bezier * 3, sizeof(POINT) * 4);
1286 for(i = 0; i < 4; i++) {
1287 ptBuf[i].x = BEZIERSHIFTUP(ptBuf[i].x);
1288 ptBuf[i].y = BEZIERSHIFTUP(ptBuf[i].y);
1290 GDI_InternalBezier( ptBuf, &out, &dwOut, nPtsOut, BEZIERMAXDEPTH );
1292 TRACE("Produced %d points\n", *nPtsOut);
1296 /******************************************************************************
1297 * GdiGradientFill (GDI32.@)
1299 * FIXME: we don't support the Alpha channel properly
1301 BOOL WINAPI GdiGradientFill( HDC hdc, TRIVERTEX *vert_array, ULONG nvert,
1302 void * grad_array, ULONG ngrad, ULONG mode )
1306 TRACE("vert_array:%p nvert:%d grad_array:%p ngrad:%d\n",
1307 vert_array, nvert, grad_array, ngrad);
1311 case GRADIENT_FILL_RECT_H:
1312 for(i = 0; i < ngrad; i++)
1314 GRADIENT_RECT *rect = ((GRADIENT_RECT *)grad_array) + i;
1315 TRIVERTEX *v1 = vert_array + rect->UpperLeft;
1316 TRIVERTEX *v2 = vert_array + rect->LowerRight;
1317 int y1 = v1->y < v2->y ? v1->y : v2->y;
1318 int y2 = v2->y > v1->y ? v2->y : v1->y;
1327 for (x = 0; x < dx; x++)
1332 hPen = CreatePen( PS_SOLID, 1, RGB(
1333 (v1->Red * (dx - x) + v2->Red * x) / dx >> 8,
1334 (v1->Green * (dx - x) + v2->Green * x) / dx >> 8,
1335 (v1->Blue * (dx - x) + v2->Blue * x) / dx >> 8));
1336 hOldPen = SelectObject( hdc, hPen );
1337 pts[0].x = v1->x + x;
1339 pts[1].x = v1->x + x;
1341 Polyline( hdc, &pts[0], 2 );
1342 DeleteObject( SelectObject(hdc, hOldPen ) );
1346 case GRADIENT_FILL_RECT_V:
1347 for(i = 0; i < ngrad; i++)
1349 GRADIENT_RECT *rect = ((GRADIENT_RECT *)grad_array) + i;
1350 TRIVERTEX *v1 = vert_array + rect->UpperLeft;
1351 TRIVERTEX *v2 = vert_array + rect->LowerRight;
1352 int x1 = v1->x < v2->x ? v1->x : v2->x;
1353 int x2 = v2->x > v1->x ? v2->x : v1->x;
1362 for (y = 0; y < dy; y++)
1367 hPen = CreatePen( PS_SOLID, 1, RGB(
1368 (v1->Red * (dy - y) + v2->Red * y) / dy >> 8,
1369 (v1->Green * (dy - y) + v2->Green * y) / dy >> 8,
1370 (v1->Blue * (dy - y) + v2->Blue * y) / dy >> 8));
1371 hOldPen = SelectObject( hdc, hPen );
1373 pts[0].y = v1->y + y;
1375 pts[1].y = v1->y + y;
1376 Polyline( hdc, &pts[0], 2 );
1377 DeleteObject( SelectObject(hdc, hOldPen ) );
1381 case GRADIENT_FILL_TRIANGLE:
1382 for (i = 0; i < ngrad; i++)
1384 GRADIENT_TRIANGLE *tri = ((GRADIENT_TRIANGLE *)grad_array) + i;
1385 TRIVERTEX *v1 = vert_array + tri->Vertex1;
1386 TRIVERTEX *v2 = vert_array + tri->Vertex2;
1387 TRIVERTEX *v3 = vert_array + tri->Vertex3;
1391 { TRIVERTEX *t = v1; v1 = v2; v2 = t; }
1394 TRIVERTEX *t = v2; v2 = v3; v3 = t;
1396 { t = v1; v1 = v2; v2 = t; }
1398 /* v1->y <= v2->y <= v3->y */
1401 for (y = 0; y < dy; y++)
1403 /* v1->y <= y < v3->y */
1404 TRIVERTEX *v = y < (v2->y - v1->y) ? v1 : v3;
1405 /* (v->y <= y < v2->y) || (v2->y <= y < v->y) */
1406 int dy2 = v2->y - v->y;
1407 int y2 = y + v1->y - v->y;
1409 int x1 = (v3->x * y + v1->x * (dy - y )) / dy;
1410 int x2 = (v2->x * y2 + v-> x * (dy2 - y2)) / dy2;
1411 int r1 = (v3->Red * y + v1->Red * (dy - y )) / dy;
1412 int r2 = (v2->Red * y2 + v-> Red * (dy2 - y2)) / dy2;
1413 int g1 = (v3->Green * y + v1->Green * (dy - y )) / dy;
1414 int g2 = (v2->Green * y2 + v-> Green * (dy2 - y2)) / dy2;
1415 int b1 = (v3->Blue * y + v1->Blue * (dy - y )) / dy;
1416 int b2 = (v2->Blue * y2 + v-> Blue * (dy2 - y2)) / dy2;
1422 for (x = 0; x < dx; x++)
1423 SetPixel (hdc, x + x1, y + v1->y, RGB(
1424 (r1 * (dx - x) + r2 * x) / dx >> 8,
1425 (g1 * (dx - x) + g2 * x) / dx >> 8,
1426 (b1 * (dx - x) + b2 * x) / dx >> 8));
1431 for (x = 0; x < dx; x++)
1432 SetPixel (hdc, x + x2, y + v1->y, RGB(
1433 (r2 * (dx - x) + r1 * x) / dx >> 8,
1434 (g2 * (dx - x) + g1 * x) / dx >> 8,
1435 (b2 * (dx - x) + b1 * x) / dx >> 8));
1447 /******************************************************************************
1448 * GdiDrawStream (GDI32.@)
1451 BOOL WINAPI GdiDrawStream( HDC hdc, ULONG in, void * pvin )
1453 FIXME("stub: %p, %d, %p\n", hdc, in, pvin);