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
);
238 if(!dc
) return FALSE
;
241 physdev
= GET_DC_PHYSDEV( dc
, pLineTo
);
242 ret
= physdev
->funcs
->pLineTo( physdev
, x
, y
);
248 release_dc_ptr( dc
);
253 /***********************************************************************
256 BOOL WINAPI
MoveToEx( HDC hdc
, INT x
, INT y
, LPPOINT pt
)
260 DC
* dc
= get_dc_ptr( hdc
);
262 if(!dc
) return FALSE
;
265 pt
->x
= dc
->CursPosX
;
266 pt
->y
= dc
->CursPosY
;
271 physdev
= GET_DC_PHYSDEV( dc
, pMoveTo
);
272 ret
= physdev
->funcs
->pMoveTo( physdev
, x
, y
);
273 release_dc_ptr( dc
);
278 /***********************************************************************
281 BOOL WINAPI
Arc( HDC hdc
, INT left
, INT top
, INT right
,
282 INT bottom
, INT xstart
, INT ystart
,
286 DC
* dc
= get_dc_ptr( hdc
);
290 PHYSDEV 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
);
298 /***********************************************************************
301 BOOL WINAPI
ArcTo( HDC hdc
,
303 INT right
, INT bottom
,
304 INT xstart
, INT ystart
,
307 double width
= fabs(right
-left
),
308 height
= fabs(bottom
-top
),
311 xcenter
= right
> left
? left
+xradius
: right
+xradius
,
312 ycenter
= bottom
> top
? top
+yradius
: bottom
+yradius
,
316 DC
* dc
= get_dc_ptr( hdc
);
317 if(!dc
) return FALSE
;
320 physdev
= GET_DC_PHYSDEV( dc
, pArcTo
);
321 result
= physdev
->funcs
->pArcTo( physdev
, left
, top
, right
, bottom
, xstart
, ystart
, xend
, yend
);
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
));
329 release_dc_ptr( dc
);
334 /***********************************************************************
337 BOOL WINAPI
Pie( HDC hdc
, INT left
, INT top
,
338 INT right
, INT bottom
, INT xstart
, INT ystart
,
343 DC
* dc
= get_dc_ptr( hdc
);
344 if (!dc
) return FALSE
;
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
);
354 /***********************************************************************
357 BOOL WINAPI
Chord( HDC hdc
, INT left
, INT top
,
358 INT right
, INT bottom
, INT xstart
, INT ystart
,
363 DC
* dc
= get_dc_ptr( hdc
);
364 if (!dc
) return FALSE
;
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
);
374 /***********************************************************************
377 BOOL WINAPI
Ellipse( HDC hdc
, INT left
, INT top
,
378 INT right
, INT bottom
)
382 DC
* dc
= get_dc_ptr( hdc
);
383 if (!dc
) return FALSE
;
386 physdev
= GET_DC_PHYSDEV( dc
, pEllipse
);
387 ret
= physdev
->funcs
->pEllipse( physdev
, left
, top
, right
, bottom
);
388 release_dc_ptr( dc
);
393 /***********************************************************************
394 * Rectangle (GDI32.@)
396 BOOL WINAPI
Rectangle( HDC hdc
, INT left
, INT top
,
397 INT right
, INT bottom
)
400 DC
* dc
= get_dc_ptr( hdc
);
404 PHYSDEV physdev
= GET_DC_PHYSDEV( dc
, pRectangle
);
406 ret
= physdev
->funcs
->pRectangle( physdev
, left
, top
, right
, bottom
);
407 release_dc_ptr( dc
);
413 /***********************************************************************
414 * RoundRect (GDI32.@)
416 BOOL WINAPI
RoundRect( HDC hdc
, INT left
, INT top
, INT right
,
417 INT bottom
, INT ell_width
, INT ell_height
)
420 DC
*dc
= get_dc_ptr( hdc
);
424 PHYSDEV physdev
= GET_DC_PHYSDEV( dc
, pRoundRect
);
426 ret
= physdev
->funcs
->pRoundRect( physdev
, left
, top
, right
, bottom
, ell_width
, ell_height
);
427 release_dc_ptr( dc
);
432 /***********************************************************************
435 COLORREF WINAPI
SetPixel( HDC hdc
, INT x
, INT y
, COLORREF color
)
438 DC
* dc
= get_dc_ptr( hdc
);
442 PHYSDEV physdev
= GET_DC_PHYSDEV( dc
, pSetPixel
);
444 ret
= physdev
->funcs
->pSetPixel( physdev
, x
, y
, color
);
445 release_dc_ptr( dc
);
450 /***********************************************************************
451 * SetPixelV (GDI32.@)
453 BOOL WINAPI
SetPixelV( HDC hdc
, INT x
, INT y
, COLORREF color
)
456 DC
* dc
= get_dc_ptr( hdc
);
460 PHYSDEV physdev
= GET_DC_PHYSDEV( dc
, pSetPixel
);
462 physdev
->funcs
->pSetPixel( physdev
, x
, y
, color
);
464 release_dc_ptr( dc
);
469 /***********************************************************************
472 COLORREF WINAPI
GetPixel( HDC hdc
, INT x
, INT y
)
474 COLORREF ret
= CLR_INVALID
;
475 DC
* dc
= get_dc_ptr( hdc
);
479 PHYSDEV physdev
= GET_DC_PHYSDEV( dc
, pGetPixel
);
481 ret
= physdev
->funcs
->pGetPixel( physdev
, x
, y
);
482 release_dc_ptr( dc
);
488 /******************************************************************************
489 * GdiSetPixelFormat [GDI32.@]
491 * Probably not the correct semantics, it's supposed to be an internal backend for SetPixelFormat.
493 BOOL WINAPI
GdiSetPixelFormat( HDC hdc
, INT iPixelFormat
, const PIXELFORMATDESCRIPTOR
*ppfd
)
496 DC
* dc
= get_dc_ptr( hdc
);
498 TRACE("(%p,%d,%p)\n",hdc
,iPixelFormat
,ppfd
);
502 PHYSDEV physdev
= GET_DC_PHYSDEV( dc
, pSetPixelFormat
);
504 bRet
= physdev
->funcs
->pSetPixelFormat( physdev
, iPixelFormat
, ppfd
);
505 release_dc_ptr( dc
);
511 /******************************************************************************
512 * GetPixelFormat [GDI32.@]
513 * Gets index of pixel format of DC
516 * hdc [I] Device context whose pixel format index is sought
519 * Success: Currently selected pixel format
522 INT WINAPI
GetPixelFormat( HDC hdc
)
525 DC
* dc
= get_dc_ptr( hdc
);
531 PHYSDEV physdev
= GET_DC_PHYSDEV( dc
, pGetPixelFormat
);
533 ret
= physdev
->funcs
->pGetPixelFormat( physdev
);
534 release_dc_ptr( dc
);
540 /******************************************************************************
541 * GdiDescribePixelFormat [GDI32.@]
543 * Probably not the correct semantics, it's supposed to be an internal backend for DescribePixelFormat.
545 INT WINAPI
GdiDescribePixelFormat( HDC hdc
, INT iPixelFormat
, UINT nBytes
,
546 LPPIXELFORMATDESCRIPTOR ppfd
)
549 DC
* dc
= get_dc_ptr( hdc
);
551 TRACE("(%p,%d,%d,%p): stub\n",hdc
,iPixelFormat
,nBytes
,ppfd
);
555 PHYSDEV physdev
= GET_DC_PHYSDEV( dc
, pDescribePixelFormat
);
557 ret
= physdev
->funcs
->pDescribePixelFormat( physdev
, iPixelFormat
, nBytes
, ppfd
);
558 release_dc_ptr( dc
);
564 /******************************************************************************
565 * GdiSwapBuffers [GDI32.@]
567 * Probably not the correct semantics, it's supposed to be an internal backend for SwapBuffers.
569 BOOL WINAPI
GdiSwapBuffers( HDC hdc
)
572 DC
* dc
= get_dc_ptr( hdc
);
578 PHYSDEV physdev
= GET_DC_PHYSDEV( dc
, pSwapBuffers
);
580 bRet
= physdev
->funcs
->pSwapBuffers( physdev
);
581 release_dc_ptr( dc
);
587 /***********************************************************************
590 BOOL WINAPI
PaintRgn( HDC hdc
, HRGN hrgn
)
593 DC
* dc
= get_dc_ptr( hdc
);
597 PHYSDEV physdev
= GET_DC_PHYSDEV( dc
, pPaintRgn
);
599 ret
= physdev
->funcs
->pPaintRgn( physdev
, hrgn
);
600 release_dc_ptr( dc
);
606 /***********************************************************************
609 BOOL WINAPI
FillRgn( HDC hdc
, HRGN hrgn
, HBRUSH hbrush
)
612 DC
* dc
= get_dc_ptr( hdc
);
616 PHYSDEV physdev
= GET_DC_PHYSDEV( dc
, pFillRgn
);
618 retval
= physdev
->funcs
->pFillRgn( physdev
, hrgn
, hbrush
);
619 release_dc_ptr( dc
);
625 /***********************************************************************
628 BOOL WINAPI
FrameRgn( HDC hdc
, HRGN hrgn
, HBRUSH hbrush
,
629 INT nWidth
, INT nHeight
)
632 DC
*dc
= get_dc_ptr( hdc
);
636 PHYSDEV physdev
= GET_DC_PHYSDEV( dc
, pFrameRgn
);
638 ret
= physdev
->funcs
->pFrameRgn( physdev
, hrgn
, hbrush
, nWidth
, nHeight
);
639 release_dc_ptr( dc
);
645 /***********************************************************************
646 * InvertRgn (GDI32.@)
648 BOOL WINAPI
InvertRgn( HDC hdc
, HRGN hrgn
)
651 DC
*dc
= get_dc_ptr( hdc
);
655 PHYSDEV physdev
= GET_DC_PHYSDEV( dc
, pInvertRgn
);
657 ret
= physdev
->funcs
->pInvertRgn( physdev
, hrgn
);
658 release_dc_ptr( dc
);
664 /**********************************************************************
667 BOOL WINAPI
Polyline( HDC hdc
, const POINT
* pt
, INT count
)
670 DC
* dc
= get_dc_ptr( hdc
);
674 PHYSDEV physdev
= GET_DC_PHYSDEV( dc
, pPolyline
);
676 ret
= physdev
->funcs
->pPolyline( physdev
, pt
, count
);
677 release_dc_ptr( dc
);
682 /**********************************************************************
683 * PolylineTo (GDI32.@)
685 BOOL WINAPI
PolylineTo( HDC hdc
, const POINT
* pt
, DWORD cCount
)
687 DC
* dc
= get_dc_ptr( hdc
);
691 if(!dc
) return FALSE
;
694 physdev
= GET_DC_PHYSDEV( dc
, pPolylineTo
);
695 ret
= physdev
->funcs
->pPolylineTo( physdev
, pt
, cCount
);
699 dc
->CursPosX
= pt
[cCount
-1].x
;
700 dc
->CursPosY
= pt
[cCount
-1].y
;
702 release_dc_ptr( dc
);
707 /**********************************************************************
710 BOOL WINAPI
Polygon( HDC hdc
, const POINT
* pt
, INT count
)
713 DC
* dc
= get_dc_ptr( hdc
);
717 PHYSDEV physdev
= GET_DC_PHYSDEV( dc
, pPolygon
);
719 ret
= physdev
->funcs
->pPolygon( physdev
, pt
, count
);
720 release_dc_ptr( dc
);
726 /**********************************************************************
727 * PolyPolygon (GDI32.@)
729 BOOL WINAPI
PolyPolygon( HDC hdc
, const POINT
* pt
, const INT
* counts
,
733 DC
* dc
= get_dc_ptr( hdc
);
737 PHYSDEV physdev
= GET_DC_PHYSDEV( dc
, pPolyPolygon
);
739 ret
= physdev
->funcs
->pPolyPolygon( physdev
, pt
, counts
, polygons
);
740 release_dc_ptr( dc
);
745 /**********************************************************************
746 * PolyPolyline (GDI32.@)
748 BOOL WINAPI
PolyPolyline( HDC hdc
, const POINT
* pt
, const DWORD
* counts
,
752 DC
* dc
= get_dc_ptr( hdc
);
756 PHYSDEV physdev
= GET_DC_PHYSDEV( dc
, pPolyPolyline
);
758 ret
= physdev
->funcs
->pPolyPolyline( physdev
, pt
, counts
, polylines
);
759 release_dc_ptr( dc
);
764 /**********************************************************************
765 * ExtFloodFill (GDI32.@)
767 BOOL WINAPI
ExtFloodFill( HDC hdc
, INT x
, INT y
, COLORREF color
,
771 DC
* dc
= get_dc_ptr( hdc
);
775 PHYSDEV physdev
= GET_DC_PHYSDEV( dc
, pExtFloodFill
);
778 ret
= physdev
->funcs
->pExtFloodFill( physdev
, x
, y
, color
, fillType
);
779 release_dc_ptr( dc
);
785 /**********************************************************************
786 * FloodFill (GDI32.@)
788 BOOL WINAPI
FloodFill( HDC hdc
, INT x
, INT y
, COLORREF color
)
790 return ExtFloodFill( hdc
, x
, y
, color
, FLOODFILLBORDER
);
794 /******************************************************************************
795 * PolyBezier [GDI32.@]
796 * Draws one or more Bezier curves
799 * hDc [I] Handle to device context
800 * lppt [I] Pointer to endpoints and control points
801 * cPoints [I] Count of endpoints and control points
807 BOOL WINAPI
PolyBezier( HDC hdc
, const POINT
* lppt
, DWORD cPoints
)
813 /* cPoints must be 3 * n + 1 (where n>=1) */
814 if (cPoints
== 1 || (cPoints
% 3) != 1) return FALSE
;
816 dc
= get_dc_ptr( hdc
);
817 if(!dc
) return FALSE
;
820 physdev
= GET_DC_PHYSDEV( dc
, pPolyBezier
);
821 ret
= physdev
->funcs
->pPolyBezier( physdev
, lppt
, cPoints
);
822 release_dc_ptr( dc
);
826 /******************************************************************************
827 * PolyBezierTo [GDI32.@]
828 * Draws one or more Bezier curves
831 * hDc [I] Handle to device context
832 * lppt [I] Pointer to endpoints and control points
833 * cPoints [I] Count of endpoints and control points
839 BOOL WINAPI
PolyBezierTo( HDC hdc
, const POINT
* lppt
, DWORD cPoints
)
845 /* cbPoints must be 3 * n (where n>=1) */
846 if (!cPoints
|| (cPoints
% 3) != 0) return FALSE
;
848 dc
= get_dc_ptr( hdc
);
849 if(!dc
) return FALSE
;
852 physdev
= GET_DC_PHYSDEV( dc
, pPolyBezierTo
);
853 ret
= physdev
->funcs
->pPolyBezierTo( physdev
, lppt
, cPoints
);
856 dc
->CursPosX
= lppt
[cPoints
-1].x
;
857 dc
->CursPosY
= lppt
[cPoints
-1].y
;
859 release_dc_ptr( dc
);
863 /***********************************************************************
866 BOOL WINAPI
AngleArc(HDC hdc
, INT x
, INT y
, DWORD dwRadius
, FLOAT eStartAngle
, FLOAT eSweepAngle
)
872 if( (signed int)dwRadius
< 0 )
875 dc
= get_dc_ptr( hdc
);
876 if(!dc
) return FALSE
;
879 physdev
= GET_DC_PHYSDEV( dc
, pAngleArc
);
880 result
= physdev
->funcs
->pAngleArc( physdev
, x
, y
, dwRadius
, eStartAngle
, eSweepAngle
);
883 dc
->CursPosX
= GDI_ROUND( x
+ cos((eStartAngle
+eSweepAngle
)*M_PI
/180) * dwRadius
);
884 dc
->CursPosY
= GDI_ROUND( y
- sin((eStartAngle
+eSweepAngle
)*M_PI
/180) * dwRadius
);
886 release_dc_ptr( dc
);
890 /***********************************************************************
893 BOOL WINAPI
PolyDraw(HDC hdc
, const POINT
*lppt
, const BYTE
*lpbTypes
,
896 DC
*dc
= get_dc_ptr( hdc
);
900 if(!dc
) return FALSE
;
903 physdev
= GET_DC_PHYSDEV( dc
, pPolyDraw
);
904 result
= physdev
->funcs
->pPolyDraw( physdev
, lppt
, lpbTypes
, cCount
);
905 release_dc_ptr( dc
);
910 /**********************************************************************
913 BOOL WINAPI
LineDDA(INT nXStart
, INT nYStart
, INT nXEnd
, INT nYEnd
,
914 LINEDDAPROC callback
, LPARAM lParam
)
916 INT xadd
= 1, yadd
= 1;
919 INT dx
= nXEnd
- nXStart
;
920 INT dy
= nYEnd
- nYStart
;
932 if (dx
> dy
) /* line is "more horizontal" */
934 err
= 2*dy
- dx
; erradd
= 2*dy
- 2*dx
;
935 for(cnt
= 0;cnt
< dx
; cnt
++)
937 callback(nXStart
,nYStart
,lParam
);
947 else /* line is "more vertical" */
949 err
= 2*dx
- dy
; erradd
= 2*dx
- 2*dy
;
950 for(cnt
= 0;cnt
< dy
; cnt
++)
952 callback(nXStart
,nYStart
,lParam
);
966 /******************************************************************
968 * *Very* simple bezier drawing code,
970 * It uses a recursive algorithm to divide the curve in a series
971 * of straight line segments. Not ideal but sufficient for me.
972 * If you are in need for something better look for some incremental
975 * 7 July 1998 Rein Klazes
979 * some macro definitions for bezier drawing
981 * to avoid truncation errors the coordinates are
982 * shifted upwards. When used in drawing they are
983 * shifted down again, including correct rounding
984 * and avoiding floating point arithmetic
985 * 4 bits should allow 27 bits coordinates which I saw
986 * somewhere in the win32 doc's
990 #define BEZIERSHIFTBITS 4
991 #define BEZIERSHIFTUP(x) ((x)<<BEZIERSHIFTBITS)
992 #define BEZIERPIXEL BEZIERSHIFTUP(1)
993 #define BEZIERSHIFTDOWN(x) (((x)+(1<<(BEZIERSHIFTBITS-1)))>>BEZIERSHIFTBITS)
994 /* maximum depth of recursion */
995 #define BEZIERMAXDEPTH 8
997 /* size of array to store points on */
998 /* enough for one curve */
999 #define BEZIER_INITBUFSIZE (150)
1001 /* calculate Bezier average, in this case the middle
1002 * correctly rounded...
1005 #define BEZIERMIDDLE(Mid, P1, P2) \
1006 (Mid).x=((P1).x+(P2).x + 1)/2;\
1007 (Mid).y=((P1).y+(P2).y + 1)/2;
1009 /**********************************************************
1010 * BezierCheck helper function to check
1011 * that recursion can be terminated
1012 * Points[0] and Points[3] are begin and endpoint
1013 * Points[1] and Points[2] are control points
1014 * level is the recursion depth
1015 * returns true if the recursion can be terminated
1017 static BOOL
BezierCheck( int level
, POINT
*Points
)
1020 dx
=Points
[3].x
-Points
[0].x
;
1021 dy
=Points
[3].y
-Points
[0].y
;
1022 if(abs(dy
)<=abs(dx
)){/* shallow line */
1023 /* check that control points are between begin and end */
1024 if(Points
[1].x
< Points
[0].x
){
1025 if(Points
[1].x
< Points
[3].x
)
1028 if(Points
[1].x
> Points
[3].x
)
1030 if(Points
[2].x
< Points
[0].x
){
1031 if(Points
[2].x
< Points
[3].x
)
1034 if(Points
[2].x
> Points
[3].x
)
1036 dx
=BEZIERSHIFTDOWN(dx
);
1037 if(!dx
) return TRUE
;
1038 if(abs(Points
[1].y
-Points
[0].y
-(dy
/dx
)*
1039 BEZIERSHIFTDOWN(Points
[1].x
-Points
[0].x
)) > BEZIERPIXEL
||
1040 abs(Points
[2].y
-Points
[0].y
-(dy
/dx
)*
1041 BEZIERSHIFTDOWN(Points
[2].x
-Points
[0].x
)) > BEZIERPIXEL
)
1045 }else{ /* steep line */
1046 /* check that control points are between begin and end */
1047 if(Points
[1].y
< Points
[0].y
){
1048 if(Points
[1].y
< Points
[3].y
)
1051 if(Points
[1].y
> Points
[3].y
)
1053 if(Points
[2].y
< Points
[0].y
){
1054 if(Points
[2].y
< Points
[3].y
)
1057 if(Points
[2].y
> Points
[3].y
)
1059 dy
=BEZIERSHIFTDOWN(dy
);
1060 if(!dy
) return TRUE
;
1061 if(abs(Points
[1].x
-Points
[0].x
-(dx
/dy
)*
1062 BEZIERSHIFTDOWN(Points
[1].y
-Points
[0].y
)) > BEZIERPIXEL
||
1063 abs(Points
[2].x
-Points
[0].x
-(dx
/dy
)*
1064 BEZIERSHIFTDOWN(Points
[2].y
-Points
[0].y
)) > BEZIERPIXEL
)
1071 /* Helper for GDI_Bezier.
1072 * Just handles one Bezier, so Points should point to four POINTs
1074 static void GDI_InternalBezier( POINT
*Points
, POINT
**PtsOut
, INT
*dwOut
,
1075 INT
*nPtsOut
, INT level
)
1077 if(*nPtsOut
== *dwOut
) {
1079 *PtsOut
= HeapReAlloc( GetProcessHeap(), 0, *PtsOut
,
1080 *dwOut
* sizeof(POINT
) );
1083 if(!level
|| BezierCheck(level
, Points
)) {
1085 (*PtsOut
)[0].x
= BEZIERSHIFTDOWN(Points
[0].x
);
1086 (*PtsOut
)[0].y
= BEZIERSHIFTDOWN(Points
[0].y
);
1089 (*PtsOut
)[*nPtsOut
].x
= BEZIERSHIFTDOWN(Points
[3].x
);
1090 (*PtsOut
)[*nPtsOut
].y
= BEZIERSHIFTDOWN(Points
[3].y
);
1093 POINT Points2
[4]; /* for the second recursive call */
1094 Points2
[3]=Points
[3];
1095 BEZIERMIDDLE(Points2
[2], Points
[2], Points
[3]);
1096 BEZIERMIDDLE(Points2
[0], Points
[1], Points
[2]);
1097 BEZIERMIDDLE(Points2
[1],Points2
[0],Points2
[2]);
1099 BEZIERMIDDLE(Points
[1], Points
[0], Points
[1]);
1100 BEZIERMIDDLE(Points
[2], Points
[1], Points2
[0]);
1101 BEZIERMIDDLE(Points
[3], Points
[2], Points2
[1]);
1103 Points2
[0]=Points
[3];
1105 /* do the two halves */
1106 GDI_InternalBezier(Points
, PtsOut
, dwOut
, nPtsOut
, level
-1);
1107 GDI_InternalBezier(Points2
, PtsOut
, dwOut
, nPtsOut
, level
-1);
1113 /***********************************************************************
1114 * GDI_Bezier [INTERNAL]
1115 * Calculate line segments that approximate -what microsoft calls- a bezier
1117 * The routine recursively divides the curve in two parts until a straight
1122 * Points [I] Ptr to count POINTs which are the end and control points
1123 * of the set of Bezier curves to flatten.
1124 * count [I] Number of Points. Must be 3n+1.
1125 * nPtsOut [O] Will contain no of points that have been produced (i.e. no. of
1130 * Ptr to an array of POINTs that contain the lines that approximate the
1131 * Beziers. The array is allocated on the process heap and it is the caller's
1132 * responsibility to HeapFree it. [this is not a particularly nice interface
1133 * but since we can't know in advance how many points we will generate, the
1134 * alternative would be to call the function twice, once to determine the size
1135 * and a second time to do the work - I decided this was too much of a pain].
1137 POINT
*GDI_Bezier( const POINT
*Points
, INT count
, INT
*nPtsOut
)
1140 INT Bezier
, dwOut
= BEZIER_INITBUFSIZE
, i
;
1142 if (count
== 1 || (count
- 1) % 3 != 0) {
1143 ERR("Invalid no. of points %d\n", count
);
1147 out
= HeapAlloc( GetProcessHeap(), 0, dwOut
* sizeof(POINT
));
1148 for(Bezier
= 0; Bezier
< (count
-1)/3; Bezier
++) {
1150 memcpy(ptBuf
, Points
+ Bezier
* 3, sizeof(POINT
) * 4);
1151 for(i
= 0; i
< 4; i
++) {
1152 ptBuf
[i
].x
= BEZIERSHIFTUP(ptBuf
[i
].x
);
1153 ptBuf
[i
].y
= BEZIERSHIFTUP(ptBuf
[i
].y
);
1155 GDI_InternalBezier( ptBuf
, &out
, &dwOut
, nPtsOut
, BEZIERMAXDEPTH
);
1157 TRACE("Produced %d points\n", *nPtsOut
);
1161 /******************************************************************************
1162 * GdiGradientFill (GDI32.@)
1164 BOOL WINAPI
GdiGradientFill( HDC hdc
, TRIVERTEX
*vert_array
, ULONG nvert
,
1165 void *grad_array
, ULONG ngrad
, ULONG mode
)
1172 TRACE("%p vert_array:%p nvert:%d grad_array:%p ngrad:%d\n", hdc
, vert_array
, nvert
, grad_array
, ngrad
);
1174 if (!vert_array
|| !nvert
|| !grad_array
|| !ngrad
|| mode
> GRADIENT_FILL_TRIANGLE
)
1176 SetLastError( ERROR_INVALID_PARAMETER
);
1179 for (i
= 0; i
< ngrad
* (mode
== GRADIENT_FILL_TRIANGLE
? 3 : 2); i
++)
1180 if (((ULONG
*)grad_array
)[i
] >= nvert
) return FALSE
;
1182 if (!(dc
= get_dc_ptr( hdc
)))
1184 SetLastError( ERROR_INVALID_PARAMETER
);
1188 physdev
= GET_DC_PHYSDEV( dc
, pGradientFill
);
1189 ret
= physdev
->funcs
->pGradientFill( physdev
, vert_array
, nvert
, grad_array
, ngrad
, mode
);
1190 release_dc_ptr( dc
);
1194 /******************************************************************************
1195 * GdiDrawStream (GDI32.@)
1198 BOOL WINAPI
GdiDrawStream( HDC hdc
, ULONG in
, void * pvin
)
1200 FIXME("stub: %p, %d, %p\n", hdc
, in
, pvin
);