2 * Graphics paths (BeginPath, EndPath etc.)
4 * Copyright 1997, 1998 Martin Boehme
6 * Copyright 2005 Dmitry Timoshkov
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"
31 #if defined(HAVE_FLOAT_H)
40 #include "gdi_private.h"
41 #include "wine/debug.h"
43 WINE_DEFAULT_DEBUG_CHANNEL(gdi);
45 /* Notes on the implementation
47 * The implementation is based on dynamically resizable arrays of points and
48 * flags. I dithered for a bit before deciding on this implementation, and
49 * I had even done a bit of work on a linked list version before switching
50 * to arrays. It's a bit of a tradeoff. When you use linked lists, the
51 * implementation of FlattenPath is easier, because you can rip the
52 * PT_BEZIERTO entries out of the middle of the list and link the
53 * corresponding PT_LINETO entries in. However, when you use arrays,
54 * PathToRegion becomes easier, since you can essentially just pass your array
55 * of points to CreatePolyPolygonRgn. Also, if I'd used linked lists, I would
56 * have had the extra effort of creating a chunk-based allocation scheme
57 * in order to use memory effectively. That's why I finally decided to use
58 * arrays. Note by the way that the array based implementation has the same
59 * linear time complexity that linked lists would have since the arrays grow
62 * The points are stored in the path in device coordinates. This is
63 * consistent with the way Windows does things (for instance, see the Win32
64 * SDK documentation for GetPath).
66 * The word "stroke" appears in several places (e.g. in the flag
67 * GdiPath.newStroke). A stroke consists of a PT_MOVETO followed by one or
68 * more PT_LINETOs or PT_BEZIERTOs, up to, but not including, the next
69 * PT_MOVETO. Note that this is not the same as the definition of a figure;
70 * a figure can contain several strokes.
72 * I modified the drawing functions (MoveTo, LineTo etc.) to test whether
73 * the path is open and to call the corresponding function in path.c if this
74 * is the case. A more elegant approach would be to modify the function
75 * pointers in the DC_FUNCTIONS structure; however, this would be a lot more
76 * complex. Also, the performance degradation caused by my approach in the
77 * case where no path is open is so small that it cannot be measured.
82 /* FIXME: A lot of stuff isn't implemented yet. There is much more to come. */
84 #define NUM_ENTRIES_INITIAL 16 /* Initial size of points / flags arrays */
85 #define GROW_FACTOR_NUMER 2 /* Numerator of grow factor for the array */
86 #define GROW_FACTOR_DENOM 1 /* Denominator of grow factor */
88 /* A floating point version of the POINT structure */
89 typedef struct tagFLOAT_POINT
95 static BOOL PATH_PathToRegion(GdiPath *pPath, INT nPolyFillMode,
97 static void PATH_EmptyPath(GdiPath *pPath);
98 static BOOL PATH_ReserveEntries(GdiPath *pPath, INT numEntries);
99 static BOOL PATH_DoArcPart(GdiPath *pPath, FLOAT_POINT corners[],
100 double angleStart, double angleEnd, BYTE startEntryType);
101 static void PATH_ScaleNormalizedPoint(FLOAT_POINT corners[], double x,
102 double y, POINT *pPoint);
103 static void PATH_NormalizePoint(FLOAT_POINT corners[], const FLOAT_POINT
104 *pPoint, double *pX, double *pY);
105 static BOOL PATH_CheckCorners(DC *dc, POINT corners[], INT x1, INT y1, INT x2, INT y2);
107 /* Performs a world-to-viewport transformation on the specified point (which
108 * is in floating point format).
110 static inline void INTERNAL_LPTODP_FLOAT(DC *dc, FLOAT_POINT *point)
114 /* Perform the transformation */
117 point->x = x * dc->xformWorld2Vport.eM11 +
118 y * dc->xformWorld2Vport.eM21 +
119 dc->xformWorld2Vport.eDx;
120 point->y = x * dc->xformWorld2Vport.eM12 +
121 y * dc->xformWorld2Vport.eM22 +
122 dc->xformWorld2Vport.eDy;
126 /***********************************************************************
127 * BeginPath (GDI32.@)
129 BOOL WINAPI BeginPath(HDC hdc)
132 DC *dc = DC_GetDCPtr( hdc );
134 if(!dc) return FALSE;
136 if(dc->funcs->pBeginPath)
137 ret = dc->funcs->pBeginPath(dc->physDev);
140 /* If path is already open, do nothing */
141 if(dc->path.state != PATH_Open)
143 /* Make sure that path is empty */
144 PATH_EmptyPath(&dc->path);
146 /* Initialize variables for new path */
147 dc->path.newStroke=TRUE;
148 dc->path.state=PATH_Open;
151 DC_ReleaseDCPtr( dc );
156 /***********************************************************************
159 BOOL WINAPI EndPath(HDC hdc)
162 DC *dc = DC_GetDCPtr( hdc );
164 if(!dc) return FALSE;
166 if(dc->funcs->pEndPath)
167 ret = dc->funcs->pEndPath(dc->physDev);
170 /* Check that path is currently being constructed */
171 if(dc->path.state!=PATH_Open)
173 SetLastError(ERROR_CAN_NOT_COMPLETE);
176 /* Set flag to indicate that path is finished */
177 else dc->path.state=PATH_Closed;
179 DC_ReleaseDCPtr( dc );
184 /******************************************************************************
185 * AbortPath [GDI32.@]
186 * Closes and discards paths from device context
189 * Check that SetLastError is being called correctly
192 * hdc [I] Handle to device context
198 BOOL WINAPI AbortPath( HDC hdc )
201 DC *dc = DC_GetDCPtr( hdc );
203 if(!dc) return FALSE;
205 if(dc->funcs->pAbortPath)
206 ret = dc->funcs->pAbortPath(dc->physDev);
207 else /* Remove all entries from the path */
208 PATH_EmptyPath( &dc->path );
209 DC_ReleaseDCPtr( dc );
214 /***********************************************************************
215 * CloseFigure (GDI32.@)
217 * FIXME: Check that SetLastError is being called correctly
219 BOOL WINAPI CloseFigure(HDC hdc)
222 DC *dc = DC_GetDCPtr( hdc );
224 if(!dc) return FALSE;
226 if(dc->funcs->pCloseFigure)
227 ret = dc->funcs->pCloseFigure(dc->physDev);
230 /* Check that path is open */
231 if(dc->path.state!=PATH_Open)
233 SetLastError(ERROR_CAN_NOT_COMPLETE);
238 /* FIXME: Shouldn't we draw a line to the beginning of the
240 /* Set PT_CLOSEFIGURE on the last entry and start a new stroke */
241 if(dc->path.numEntriesUsed)
243 dc->path.pFlags[dc->path.numEntriesUsed-1]|=PT_CLOSEFIGURE;
244 dc->path.newStroke=TRUE;
248 DC_ReleaseDCPtr( dc );
253 /***********************************************************************
256 INT WINAPI GetPath(HDC hdc, LPPOINT pPoints, LPBYTE pTypes,
261 DC *dc = DC_GetDCPtr( hdc );
267 /* Check that path is closed */
268 if(pPath->state!=PATH_Closed)
270 SetLastError(ERROR_CAN_NOT_COMPLETE);
275 ret = pPath->numEntriesUsed;
276 else if(nSize<pPath->numEntriesUsed)
278 SetLastError(ERROR_INVALID_PARAMETER);
283 memcpy(pPoints, pPath->pPoints, sizeof(POINT)*pPath->numEntriesUsed);
284 memcpy(pTypes, pPath->pFlags, sizeof(BYTE)*pPath->numEntriesUsed);
286 /* Convert the points to logical coordinates */
287 if(!DPtoLP(hdc, pPoints, pPath->numEntriesUsed))
289 /* FIXME: Is this the correct value? */
290 SetLastError(ERROR_CAN_NOT_COMPLETE);
293 else ret = pPath->numEntriesUsed;
296 DC_ReleaseDCPtr( dc );
301 /***********************************************************************
302 * PathToRegion (GDI32.@)
305 * Check that SetLastError is being called correctly
307 * The documentation does not state this explicitly, but a test under Windows
308 * shows that the region which is returned should be in device coordinates.
310 HRGN WINAPI PathToRegion(HDC hdc)
314 DC *dc = DC_GetDCPtr( hdc );
316 /* Get pointer to path */
321 /* Check that path is closed */
322 if(pPath->state!=PATH_Closed) SetLastError(ERROR_CAN_NOT_COMPLETE);
325 /* FIXME: Should we empty the path even if conversion failed? */
326 if(PATH_PathToRegion(pPath, GetPolyFillMode(hdc), &hrgnRval))
327 PATH_EmptyPath(pPath);
331 DC_ReleaseDCPtr( dc );
335 static BOOL PATH_FillPath(DC *dc, GdiPath *pPath)
337 INT mapMode, graphicsMode;
338 SIZE ptViewportExt, ptWindowExt;
339 POINT ptViewportOrg, ptWindowOrg;
343 if(dc->funcs->pFillPath)
344 return dc->funcs->pFillPath(dc->physDev);
346 /* Check that path is closed */
347 if(pPath->state!=PATH_Closed)
349 SetLastError(ERROR_CAN_NOT_COMPLETE);
353 /* Construct a region from the path and fill it */
354 if(PATH_PathToRegion(pPath, dc->polyFillMode, &hrgn))
356 /* Since PaintRgn interprets the region as being in logical coordinates
357 * but the points we store for the path are already in device
358 * coordinates, we have to set the mapping mode to MM_TEXT temporarily.
359 * Using SaveDC to save information about the mapping mode / world
360 * transform would be easier but would require more overhead, especially
361 * now that SaveDC saves the current path.
364 /* Save the information about the old mapping mode */
365 mapMode=GetMapMode(dc->hSelf);
366 GetViewportExtEx(dc->hSelf, &ptViewportExt);
367 GetViewportOrgEx(dc->hSelf, &ptViewportOrg);
368 GetWindowExtEx(dc->hSelf, &ptWindowExt);
369 GetWindowOrgEx(dc->hSelf, &ptWindowOrg);
371 /* Save world transform
372 * NB: The Windows documentation on world transforms would lead one to
373 * believe that this has to be done only in GM_ADVANCED; however, my
374 * tests show that resetting the graphics mode to GM_COMPATIBLE does
375 * not reset the world transform.
377 GetWorldTransform(dc->hSelf, &xform);
380 SetMapMode(dc->hSelf, MM_TEXT);
381 SetViewportOrgEx(dc->hSelf, 0, 0, NULL);
382 SetWindowOrgEx(dc->hSelf, 0, 0, NULL);
383 graphicsMode=GetGraphicsMode(dc->hSelf);
384 SetGraphicsMode(dc->hSelf, GM_ADVANCED);
385 ModifyWorldTransform(dc->hSelf, &xform, MWT_IDENTITY);
386 SetGraphicsMode(dc->hSelf, graphicsMode);
388 /* Paint the region */
389 PaintRgn(dc->hSelf, hrgn);
391 /* Restore the old mapping mode */
392 SetMapMode(dc->hSelf, mapMode);
393 SetViewportExtEx(dc->hSelf, ptViewportExt.cx, ptViewportExt.cy, NULL);
394 SetViewportOrgEx(dc->hSelf, ptViewportOrg.x, ptViewportOrg.y, NULL);
395 SetWindowExtEx(dc->hSelf, ptWindowExt.cx, ptWindowExt.cy, NULL);
396 SetWindowOrgEx(dc->hSelf, ptWindowOrg.x, ptWindowOrg.y, NULL);
398 /* Go to GM_ADVANCED temporarily to restore the world transform */
399 graphicsMode=GetGraphicsMode(dc->hSelf);
400 SetGraphicsMode(dc->hSelf, GM_ADVANCED);
401 SetWorldTransform(dc->hSelf, &xform);
402 SetGraphicsMode(dc->hSelf, graphicsMode);
409 /***********************************************************************
413 * Check that SetLastError is being called correctly
415 BOOL WINAPI FillPath(HDC hdc)
417 DC *dc = DC_GetDCPtr( hdc );
420 if(!dc) return FALSE;
422 if(dc->funcs->pFillPath)
423 bRet = dc->funcs->pFillPath(dc->physDev);
426 bRet = PATH_FillPath(dc, &dc->path);
429 /* FIXME: Should the path be emptied even if conversion
431 PATH_EmptyPath(&dc->path);
434 DC_ReleaseDCPtr( dc );
439 /***********************************************************************
440 * SelectClipPath (GDI32.@)
442 * Check that SetLastError is being called correctly
444 BOOL WINAPI SelectClipPath(HDC hdc, INT iMode)
448 BOOL success = FALSE;
449 DC *dc = DC_GetDCPtr( hdc );
451 if(!dc) return FALSE;
453 if(dc->funcs->pSelectClipPath)
454 success = dc->funcs->pSelectClipPath(dc->physDev, iMode);
459 /* Check that path is closed */
460 if(pPath->state!=PATH_Closed)
461 SetLastError(ERROR_CAN_NOT_COMPLETE);
462 /* Construct a region from the path */
463 else if(PATH_PathToRegion(pPath, GetPolyFillMode(hdc), &hrgnPath))
465 success = ExtSelectClipRgn( hdc, hrgnPath, iMode ) != ERROR;
466 DeleteObject(hrgnPath);
470 PATH_EmptyPath(pPath);
471 /* FIXME: Should this function delete the path even if it failed? */
474 DC_ReleaseDCPtr( dc );
479 /***********************************************************************
485 * Initializes the GdiPath structure.
487 void PATH_InitGdiPath(GdiPath *pPath)
491 pPath->state=PATH_Null;
494 pPath->numEntriesUsed=0;
495 pPath->numEntriesAllocated=0;
498 /* PATH_DestroyGdiPath
500 * Destroys a GdiPath structure (frees the memory in the arrays).
502 void PATH_DestroyGdiPath(GdiPath *pPath)
506 HeapFree( GetProcessHeap(), 0, pPath->pPoints );
507 HeapFree( GetProcessHeap(), 0, pPath->pFlags );
510 /* PATH_AssignGdiPath
512 * Copies the GdiPath structure "pPathSrc" to "pPathDest". A deep copy is
513 * performed, i.e. the contents of the pPoints and pFlags arrays are copied,
514 * not just the pointers. Since this means that the arrays in pPathDest may
515 * need to be resized, pPathDest should have been initialized using
516 * PATH_InitGdiPath (in C++, this function would be an assignment operator,
517 * not a copy constructor).
518 * Returns TRUE if successful, else FALSE.
520 BOOL PATH_AssignGdiPath(GdiPath *pPathDest, const GdiPath *pPathSrc)
522 assert(pPathDest!=NULL && pPathSrc!=NULL);
524 /* Make sure destination arrays are big enough */
525 if(!PATH_ReserveEntries(pPathDest, pPathSrc->numEntriesUsed))
528 /* Perform the copy operation */
529 memcpy(pPathDest->pPoints, pPathSrc->pPoints,
530 sizeof(POINT)*pPathSrc->numEntriesUsed);
531 memcpy(pPathDest->pFlags, pPathSrc->pFlags,
532 sizeof(BYTE)*pPathSrc->numEntriesUsed);
534 pPathDest->state=pPathSrc->state;
535 pPathDest->numEntriesUsed=pPathSrc->numEntriesUsed;
536 pPathDest->newStroke=pPathSrc->newStroke;
543 * Should be called when a MoveTo is performed on a DC that has an
544 * open path. This starts a new stroke. Returns TRUE if successful, else
547 BOOL PATH_MoveTo(DC *dc)
549 GdiPath *pPath = &dc->path;
551 /* Check that path is open */
552 if(pPath->state!=PATH_Open)
553 /* FIXME: Do we have to call SetLastError? */
556 /* Start a new stroke */
557 pPath->newStroke=TRUE;
564 * Should be called when a LineTo is performed on a DC that has an
565 * open path. This adds a PT_LINETO entry to the path (and possibly
566 * a PT_MOVETO entry, if this is the first LineTo in a stroke).
567 * Returns TRUE if successful, else FALSE.
569 BOOL PATH_LineTo(DC *dc, INT x, INT y)
571 GdiPath *pPath = &dc->path;
572 POINT point, pointCurPos;
574 /* Check that path is open */
575 if(pPath->state!=PATH_Open)
578 /* Convert point to device coordinates */
581 if(!LPtoDP(dc->hSelf, &point, 1))
584 /* Add a PT_MOVETO if necessary */
587 pPath->newStroke=FALSE;
588 pointCurPos.x = dc->CursPosX;
589 pointCurPos.y = dc->CursPosY;
590 if(!LPtoDP(dc->hSelf, &pointCurPos, 1))
592 if(!PATH_AddEntry(pPath, &pointCurPos, PT_MOVETO))
596 /* Add a PT_LINETO entry */
597 return PATH_AddEntry(pPath, &point, PT_LINETO);
602 * Should be called when a call to RoundRect is performed on a DC that has
603 * an open path. Returns TRUE if successful, else FALSE.
605 * FIXME: it adds the same entries to the path as windows does, but there
606 * is an error in the bezier drawing code so that there are small pixel-size
607 * gaps when the resulting path is drawn by StrokePath()
609 BOOL PATH_RoundRect(DC *dc, INT x1, INT y1, INT x2, INT y2, INT ell_width, INT ell_height)
611 GdiPath *pPath = &dc->path;
612 POINT corners[2], pointTemp;
613 FLOAT_POINT ellCorners[2];
615 /* Check that path is open */
616 if(pPath->state!=PATH_Open)
619 if(!PATH_CheckCorners(dc,corners,x1,y1,x2,y2))
622 /* Add points to the roundrect path */
623 ellCorners[0].x = corners[1].x-ell_width;
624 ellCorners[0].y = corners[0].y;
625 ellCorners[1].x = corners[1].x;
626 ellCorners[1].y = corners[0].y+ell_height;
627 if(!PATH_DoArcPart(pPath, ellCorners, 0, -M_PI_2, PT_MOVETO))
629 pointTemp.x = corners[0].x+ell_width/2;
630 pointTemp.y = corners[0].y;
631 if(!PATH_AddEntry(pPath, &pointTemp, PT_LINETO))
633 ellCorners[0].x = corners[0].x;
634 ellCorners[1].x = corners[0].x+ell_width;
635 if(!PATH_DoArcPart(pPath, ellCorners, -M_PI_2, -M_PI, FALSE))
637 pointTemp.x = corners[0].x;
638 pointTemp.y = corners[1].y-ell_height/2;
639 if(!PATH_AddEntry(pPath, &pointTemp, PT_LINETO))
641 ellCorners[0].y = corners[1].y-ell_height;
642 ellCorners[1].y = corners[1].y;
643 if(!PATH_DoArcPart(pPath, ellCorners, M_PI, M_PI_2, FALSE))
645 pointTemp.x = corners[1].x-ell_width/2;
646 pointTemp.y = corners[1].y;
647 if(!PATH_AddEntry(pPath, &pointTemp, PT_LINETO))
649 ellCorners[0].x = corners[1].x-ell_width;
650 ellCorners[1].x = corners[1].x;
651 if(!PATH_DoArcPart(pPath, ellCorners, M_PI_2, 0, FALSE))
654 /* Close the roundrect figure */
655 if(!CloseFigure(dc->hSelf))
663 * Should be called when a call to Rectangle is performed on a DC that has
664 * an open path. Returns TRUE if successful, else FALSE.
666 BOOL PATH_Rectangle(DC *dc, INT x1, INT y1, INT x2, INT y2)
668 GdiPath *pPath = &dc->path;
669 POINT corners[2], pointTemp;
671 /* Check that path is open */
672 if(pPath->state!=PATH_Open)
675 if(!PATH_CheckCorners(dc,corners,x1,y1,x2,y2))
678 /* Close any previous figure */
679 if(!CloseFigure(dc->hSelf))
681 /* The CloseFigure call shouldn't have failed */
686 /* Add four points to the path */
687 pointTemp.x=corners[1].x;
688 pointTemp.y=corners[0].y;
689 if(!PATH_AddEntry(pPath, &pointTemp, PT_MOVETO))
691 if(!PATH_AddEntry(pPath, corners, PT_LINETO))
693 pointTemp.x=corners[0].x;
694 pointTemp.y=corners[1].y;
695 if(!PATH_AddEntry(pPath, &pointTemp, PT_LINETO))
697 if(!PATH_AddEntry(pPath, corners+1, PT_LINETO))
700 /* Close the rectangle figure */
701 if(!CloseFigure(dc->hSelf))
703 /* The CloseFigure call shouldn't have failed */
713 * Should be called when a call to Ellipse is performed on a DC that has
714 * an open path. This adds four Bezier splines representing the ellipse
715 * to the path. Returns TRUE if successful, else FALSE.
717 BOOL PATH_Ellipse(DC *dc, INT x1, INT y1, INT x2, INT y2)
719 return( PATH_Arc(dc, x1, y1, x2, y2, x1, (y1+y2)/2, x1, (y1+y2)/2,0) &&
720 CloseFigure(dc->hSelf) );
725 * Should be called when a call to Arc is performed on a DC that has
726 * an open path. This adds up to five Bezier splines representing the arc
727 * to the path. When 'lines' is 1, we add 1 extra line to get a chord,
728 * when 'lines' is 2, we add 2 extra lines to get a pie, and when 'lines' is
729 * -1 we add 1 extra line from the current DC position to the starting position
730 * of the arc before drawing the arc itself (arcto). Returns TRUE if successful,
733 BOOL PATH_Arc(DC *dc, INT x1, INT y1, INT x2, INT y2,
734 INT xStart, INT yStart, INT xEnd, INT yEnd, INT lines)
736 GdiPath *pPath = &dc->path;
737 double angleStart, angleEnd, angleStartQuadrant, angleEndQuadrant=0.0;
738 /* Initialize angleEndQuadrant to silence gcc's warning */
740 FLOAT_POINT corners[2], pointStart, pointEnd;
741 POINT centre, pointCurPos;
745 /* FIXME: This function should check for all possible error returns */
746 /* FIXME: Do we have to respect newStroke? */
748 /* Check that path is open */
749 if(pPath->state!=PATH_Open)
752 /* Check for zero height / width */
753 /* FIXME: Only in GM_COMPATIBLE? */
757 /* Convert points to device coordinates */
758 corners[0].x=(FLOAT)x1;
759 corners[0].y=(FLOAT)y1;
760 corners[1].x=(FLOAT)x2;
761 corners[1].y=(FLOAT)y2;
762 pointStart.x=(FLOAT)xStart;
763 pointStart.y=(FLOAT)yStart;
764 pointEnd.x=(FLOAT)xEnd;
765 pointEnd.y=(FLOAT)yEnd;
766 INTERNAL_LPTODP_FLOAT(dc, corners);
767 INTERNAL_LPTODP_FLOAT(dc, corners+1);
768 INTERNAL_LPTODP_FLOAT(dc, &pointStart);
769 INTERNAL_LPTODP_FLOAT(dc, &pointEnd);
771 /* Make sure first corner is top left and second corner is bottom right */
772 if(corners[0].x>corners[1].x)
775 corners[0].x=corners[1].x;
778 if(corners[0].y>corners[1].y)
781 corners[0].y=corners[1].y;
785 /* Compute start and end angle */
786 PATH_NormalizePoint(corners, &pointStart, &x, &y);
787 angleStart=atan2(y, x);
788 PATH_NormalizePoint(corners, &pointEnd, &x, &y);
789 angleEnd=atan2(y, x);
791 /* Make sure the end angle is "on the right side" of the start angle */
792 if(dc->ArcDirection==AD_CLOCKWISE)
794 if(angleEnd<=angleStart)
797 assert(angleEnd>=angleStart);
802 if(angleEnd>=angleStart)
805 assert(angleEnd<=angleStart);
809 /* In GM_COMPATIBLE, don't include bottom and right edges */
810 if(dc->GraphicsMode==GM_COMPATIBLE)
816 /* arcto: Add a PT_MOVETO only if this is the first entry in a stroke */
817 if(lines==-1 && pPath->newStroke)
819 pPath->newStroke=FALSE;
820 pointCurPos.x = dc->CursPosX;
821 pointCurPos.y = dc->CursPosY;
822 if(!LPtoDP(dc->hSelf, &pointCurPos, 1))
824 if(!PATH_AddEntry(pPath, &pointCurPos, PT_MOVETO))
828 /* Add the arc to the path with one Bezier spline per quadrant that the
834 /* Determine the start and end angles for this quadrant */
837 angleStartQuadrant=angleStart;
838 if(dc->ArcDirection==AD_CLOCKWISE)
839 angleEndQuadrant=(floor(angleStart/M_PI_2)+1.0)*M_PI_2;
841 angleEndQuadrant=(ceil(angleStart/M_PI_2)-1.0)*M_PI_2;
845 angleStartQuadrant=angleEndQuadrant;
846 if(dc->ArcDirection==AD_CLOCKWISE)
847 angleEndQuadrant+=M_PI_2;
849 angleEndQuadrant-=M_PI_2;
852 /* Have we reached the last part of the arc? */
853 if((dc->ArcDirection==AD_CLOCKWISE &&
854 angleEnd<angleEndQuadrant) ||
855 (dc->ArcDirection==AD_COUNTERCLOCKWISE &&
856 angleEnd>angleEndQuadrant))
858 /* Adjust the end angle for this quadrant */
859 angleEndQuadrant=angleEnd;
863 /* Add the Bezier spline to the path */
864 PATH_DoArcPart(pPath, corners, angleStartQuadrant, angleEndQuadrant,
865 start ? (lines==-1 ? PT_LINETO : PT_MOVETO) : FALSE);
869 /* chord: close figure. pie: add line and close figure */
872 if(!CloseFigure(dc->hSelf))
877 centre.x = (corners[0].x+corners[1].x)/2;
878 centre.y = (corners[0].y+corners[1].y)/2;
879 if(!PATH_AddEntry(pPath, ¢re, PT_LINETO | PT_CLOSEFIGURE))
886 BOOL PATH_PolyBezierTo(DC *dc, const POINT *pts, DWORD cbPoints)
888 GdiPath *pPath = &dc->path;
892 /* Check that path is open */
893 if(pPath->state!=PATH_Open)
896 /* Add a PT_MOVETO if necessary */
899 pPath->newStroke=FALSE;
902 if(!LPtoDP(dc->hSelf, &pt, 1))
904 if(!PATH_AddEntry(pPath, &pt, PT_MOVETO))
908 for(i = 0; i < cbPoints; i++) {
910 if(!LPtoDP(dc->hSelf, &pt, 1))
912 PATH_AddEntry(pPath, &pt, PT_BEZIERTO);
917 BOOL PATH_PolyBezier(DC *dc, const POINT *pts, DWORD cbPoints)
919 GdiPath *pPath = &dc->path;
923 /* Check that path is open */
924 if(pPath->state!=PATH_Open)
927 for(i = 0; i < cbPoints; i++) {
929 if(!LPtoDP(dc->hSelf, &pt, 1))
931 PATH_AddEntry(pPath, &pt, (i == 0) ? PT_MOVETO : PT_BEZIERTO);
938 * Should be called when a call to PolyDraw is performed on a DC that has
939 * an open path. Returns TRUE if successful, else FALSE.
941 BOOL PATH_PolyDraw(DC *dc, const POINT *pts, const BYTE *types,
944 GdiPath *pPath = &dc->path;
945 POINT lastmove, orig_pos;
948 lastmove.x = orig_pos.x = dc->CursPosX;
949 lastmove.y = orig_pos.y = dc->CursPosY;
951 for(i = pPath->numEntriesUsed - 1; i >= 0; i--){
952 if(pPath->pFlags[i] == PT_MOVETO){
953 lastmove.x = pPath->pPoints[i].x;
954 lastmove.y = pPath->pPoints[i].y;
955 if(!DPtoLP(dc->hSelf, &lastmove, 1))
961 for(i = 0; i < cbPoints; i++){
962 if(types[i] == PT_MOVETO){
963 pPath->newStroke = TRUE;
964 lastmove.x = pts[i].x;
965 lastmove.y = pts[i].y;
967 else if((types[i] & ~PT_CLOSEFIGURE) == PT_LINETO){
968 PATH_LineTo(dc, pts[i].x, pts[i].y);
970 else if(types[i] == PT_BEZIERTO){
971 if(!((i + 2 < cbPoints) && (types[i + 1] == PT_BEZIERTO)
972 && ((types[i + 2] & ~PT_CLOSEFIGURE) == PT_BEZIERTO)))
974 PATH_PolyBezierTo(dc, &(pts[i]), 3);
980 dc->CursPosX = pts[i].x;
981 dc->CursPosY = pts[i].y;
983 if(types[i] & PT_CLOSEFIGURE){
984 pPath->pFlags[pPath->numEntriesUsed-1] |= PT_CLOSEFIGURE;
985 pPath->newStroke = TRUE;
986 dc->CursPosX = lastmove.x;
987 dc->CursPosY = lastmove.y;
994 if((dc->CursPosX != orig_pos.x) || (dc->CursPosY != orig_pos.y)){
995 pPath->newStroke = TRUE;
996 dc->CursPosX = orig_pos.x;
997 dc->CursPosY = orig_pos.y;
1003 BOOL PATH_Polyline(DC *dc, const POINT *pts, DWORD cbPoints)
1005 GdiPath *pPath = &dc->path;
1009 /* Check that path is open */
1010 if(pPath->state!=PATH_Open)
1013 for(i = 0; i < cbPoints; i++) {
1015 if(!LPtoDP(dc->hSelf, &pt, 1))
1017 PATH_AddEntry(pPath, &pt, (i == 0) ? PT_MOVETO : PT_LINETO);
1022 BOOL PATH_PolylineTo(DC *dc, const POINT *pts, DWORD cbPoints)
1024 GdiPath *pPath = &dc->path;
1028 /* Check that path is open */
1029 if(pPath->state!=PATH_Open)
1032 /* Add a PT_MOVETO if necessary */
1033 if(pPath->newStroke)
1035 pPath->newStroke=FALSE;
1036 pt.x = dc->CursPosX;
1037 pt.y = dc->CursPosY;
1038 if(!LPtoDP(dc->hSelf, &pt, 1))
1040 if(!PATH_AddEntry(pPath, &pt, PT_MOVETO))
1044 for(i = 0; i < cbPoints; i++) {
1046 if(!LPtoDP(dc->hSelf, &pt, 1))
1048 PATH_AddEntry(pPath, &pt, PT_LINETO);
1055 BOOL PATH_Polygon(DC *dc, const POINT *pts, DWORD cbPoints)
1057 GdiPath *pPath = &dc->path;
1061 /* Check that path is open */
1062 if(pPath->state!=PATH_Open)
1065 for(i = 0; i < cbPoints; i++) {
1067 if(!LPtoDP(dc->hSelf, &pt, 1))
1069 PATH_AddEntry(pPath, &pt, (i == 0) ? PT_MOVETO :
1070 ((i == cbPoints-1) ? PT_LINETO | PT_CLOSEFIGURE :
1076 BOOL PATH_PolyPolygon( DC *dc, const POINT* pts, const INT* counts,
1079 GdiPath *pPath = &dc->path;
1084 /* Check that path is open */
1085 if(pPath->state!=PATH_Open)
1088 for(i = 0, poly = 0; poly < polygons; poly++) {
1089 for(point = 0; point < counts[poly]; point++, i++) {
1091 if(!LPtoDP(dc->hSelf, &pt, 1))
1093 if(point == 0) startpt = pt;
1094 PATH_AddEntry(pPath, &pt, (point == 0) ? PT_MOVETO : PT_LINETO);
1096 /* win98 adds an extra line to close the figure for some reason */
1097 PATH_AddEntry(pPath, &startpt, PT_LINETO | PT_CLOSEFIGURE);
1102 BOOL PATH_PolyPolyline( DC *dc, const POINT* pts, const DWORD* counts,
1105 GdiPath *pPath = &dc->path;
1107 UINT poly, point, i;
1109 /* Check that path is open */
1110 if(pPath->state!=PATH_Open)
1113 for(i = 0, poly = 0; poly < polylines; poly++) {
1114 for(point = 0; point < counts[poly]; point++, i++) {
1116 if(!LPtoDP(dc->hSelf, &pt, 1))
1118 PATH_AddEntry(pPath, &pt, (point == 0) ? PT_MOVETO : PT_LINETO);
1124 /***********************************************************************
1125 * Internal functions
1128 /* PATH_CheckCorners
1130 * Helper function for PATH_RoundRect() and PATH_Rectangle()
1132 static BOOL PATH_CheckCorners(DC *dc, POINT corners[], INT x1, INT y1, INT x2, INT y2)
1136 /* Convert points to device coordinates */
1141 if(!LPtoDP(dc->hSelf, corners, 2))
1144 /* Make sure first corner is top left and second corner is bottom right */
1145 if(corners[0].x>corners[1].x)
1148 corners[0].x=corners[1].x;
1151 if(corners[0].y>corners[1].y)
1154 corners[0].y=corners[1].y;
1158 /* In GM_COMPATIBLE, don't include bottom and right edges */
1159 if(dc->GraphicsMode==GM_COMPATIBLE)
1168 /* PATH_AddFlatBezier
1170 static BOOL PATH_AddFlatBezier(GdiPath *pPath, POINT *pt, BOOL closed)
1175 pts = GDI_Bezier( pt, 4, &no );
1176 if(!pts) return FALSE;
1178 for(i = 1; i < no; i++)
1179 PATH_AddEntry(pPath, &pts[i],
1180 (i == no-1 && closed) ? PT_LINETO | PT_CLOSEFIGURE : PT_LINETO);
1181 HeapFree( GetProcessHeap(), 0, pts );
1187 * Replaces Beziers with line segments
1190 static BOOL PATH_FlattenPath(GdiPath *pPath)
1195 memset(&newPath, 0, sizeof(newPath));
1196 newPath.state = PATH_Open;
1197 for(srcpt = 0; srcpt < pPath->numEntriesUsed; srcpt++) {
1198 switch(pPath->pFlags[srcpt] & ~PT_CLOSEFIGURE) {
1201 PATH_AddEntry(&newPath, &pPath->pPoints[srcpt],
1202 pPath->pFlags[srcpt]);
1205 PATH_AddFlatBezier(&newPath, &pPath->pPoints[srcpt-1],
1206 pPath->pFlags[srcpt+2] & PT_CLOSEFIGURE);
1211 newPath.state = PATH_Closed;
1212 PATH_AssignGdiPath(pPath, &newPath);
1213 PATH_DestroyGdiPath(&newPath);
1217 /* PATH_PathToRegion
1219 * Creates a region from the specified path using the specified polygon
1220 * filling mode. The path is left unchanged. A handle to the region that
1221 * was created is stored in *pHrgn. If successful, TRUE is returned; if an
1222 * error occurs, SetLastError is called with the appropriate value and
1223 * FALSE is returned.
1225 static BOOL PATH_PathToRegion(GdiPath *pPath, INT nPolyFillMode,
1228 int numStrokes, iStroke, i;
1229 INT *pNumPointsInStroke;
1232 assert(pPath!=NULL);
1233 assert(pHrgn!=NULL);
1235 PATH_FlattenPath(pPath);
1237 /* FIXME: What happens when number of points is zero? */
1239 /* First pass: Find out how many strokes there are in the path */
1240 /* FIXME: We could eliminate this with some bookkeeping in GdiPath */
1242 for(i=0; i<pPath->numEntriesUsed; i++)
1243 if((pPath->pFlags[i] & ~PT_CLOSEFIGURE) == PT_MOVETO)
1246 /* Allocate memory for number-of-points-in-stroke array */
1247 pNumPointsInStroke=HeapAlloc( GetProcessHeap(), 0, sizeof(int) * numStrokes );
1248 if(!pNumPointsInStroke)
1250 SetLastError(ERROR_NOT_ENOUGH_MEMORY);
1254 /* Second pass: remember number of points in each polygon */
1255 iStroke=-1; /* Will get incremented to 0 at beginning of first stroke */
1256 for(i=0; i<pPath->numEntriesUsed; i++)
1258 /* Is this the beginning of a new stroke? */
1259 if((pPath->pFlags[i] & ~PT_CLOSEFIGURE) == PT_MOVETO)
1262 pNumPointsInStroke[iStroke]=0;
1265 pNumPointsInStroke[iStroke]++;
1268 /* Create a region from the strokes */
1269 hrgn=CreatePolyPolygonRgn(pPath->pPoints, pNumPointsInStroke,
1270 numStrokes, nPolyFillMode);
1272 /* Free memory for number-of-points-in-stroke array */
1273 HeapFree( GetProcessHeap(), 0, pNumPointsInStroke );
1277 SetLastError(ERROR_NOT_ENOUGH_MEMORY);
1286 static inline INT int_from_fixed(FIXED f)
1288 return (f.fract >= 0x8000) ? (f.value + 1) : f.value;
1291 /**********************************************************************
1294 * internally used by PATH_add_outline
1296 static void PATH_BezierTo(GdiPath *pPath, POINT *lppt, INT n)
1302 PATH_AddEntry(pPath, &lppt[1], PT_LINETO);
1306 PATH_AddEntry(pPath, &lppt[0], PT_BEZIERTO);
1307 PATH_AddEntry(pPath, &lppt[1], PT_BEZIERTO);
1308 PATH_AddEntry(pPath, &lppt[2], PT_BEZIERTO);
1322 pt[2].x = (lppt[i+2].x + lppt[i+1].x) / 2;
1323 pt[2].y = (lppt[i+2].y + lppt[i+1].y) / 2;
1324 PATH_BezierTo(pPath, pt, 3);
1332 PATH_BezierTo(pPath, pt, 3);
1336 static BOOL PATH_add_outline(DC *dc, INT x, INT y, TTPOLYGONHEADER *header, DWORD size)
1338 GdiPath *pPath = &dc->path;
1339 TTPOLYGONHEADER *start;
1344 while ((char *)header < (char *)start + size)
1348 if (header->dwType != TT_POLYGON_TYPE)
1350 FIXME("Unknown header type %d\n", header->dwType);
1354 pt.x = x + int_from_fixed(header->pfxStart.x);
1355 pt.y = y - int_from_fixed(header->pfxStart.y);
1356 LPtoDP(dc->hSelf, &pt, 1);
1357 PATH_AddEntry(pPath, &pt, PT_MOVETO);
1359 curve = (TTPOLYCURVE *)(header + 1);
1361 while ((char *)curve < (char *)header + header->cb)
1363 /*TRACE("curve->wType %d\n", curve->wType);*/
1365 switch(curve->wType)
1371 for (i = 0; i < curve->cpfx; i++)
1373 pt.x = x + int_from_fixed(curve->apfx[i].x);
1374 pt.y = y - int_from_fixed(curve->apfx[i].y);
1375 LPtoDP(dc->hSelf, &pt, 1);
1376 PATH_AddEntry(pPath, &pt, PT_LINETO);
1381 case TT_PRIM_QSPLINE:
1382 case TT_PRIM_CSPLINE:
1386 POINT *pts = HeapAlloc(GetProcessHeap(), 0, (curve->cpfx + 1) * sizeof(POINT));
1388 if (!pts) return FALSE;
1390 ptfx = *(POINTFX *)((char *)curve - sizeof(POINTFX));
1392 pts[0].x = x + int_from_fixed(ptfx.x);
1393 pts[0].y = y - int_from_fixed(ptfx.y);
1394 LPtoDP(dc->hSelf, &pts[0], 1);
1396 for(i = 0; i < curve->cpfx; i++)
1398 pts[i + 1].x = x + int_from_fixed(curve->apfx[i].x);
1399 pts[i + 1].y = y - int_from_fixed(curve->apfx[i].y);
1400 LPtoDP(dc->hSelf, &pts[i + 1], 1);
1403 PATH_BezierTo(pPath, pts, curve->cpfx + 1);
1405 HeapFree(GetProcessHeap(), 0, pts);
1410 FIXME("Unknown curve type %04x\n", curve->wType);
1414 curve = (TTPOLYCURVE *)&curve->apfx[curve->cpfx];
1417 header = (TTPOLYGONHEADER *)((char *)header + header->cb);
1420 return CloseFigure(dc->hSelf);
1423 /**********************************************************************
1426 BOOL PATH_ExtTextOut(DC *dc, INT x, INT y, UINT flags, const RECT *lprc,
1427 LPCWSTR str, UINT count, const INT *dx)
1430 double cosEsc, sinEsc;
1433 HDC hdc = dc->hSelf;
1434 INT offset = 0, xoff = 0, yoff = 0;
1436 TRACE("%p, %d, %d, %08x, %s, %s, %d, %p)\n", hdc, x, y, flags,
1437 wine_dbgstr_rect(lprc), debugstr_wn(str, count), count, dx);
1439 if (!count) return TRUE;
1441 GetObjectW(GetCurrentObject(hdc, OBJ_FONT), sizeof(lf), &lf);
1443 if (lf.lfEscapement != 0)
1445 cosEsc = cos(lf.lfEscapement * M_PI / 1800);
1446 sinEsc = sin(lf.lfEscapement * M_PI / 1800);
1453 GetDCOrgEx(hdc, &org);
1455 for (idx = 0; idx < count; idx++)
1461 dwSize = GetGlyphOutlineW(hdc, str[idx], GGO_GLYPH_INDEX | GGO_NATIVE, &gm, 0, NULL, NULL);
1462 if (!dwSize) return FALSE;
1464 outline = HeapAlloc(GetProcessHeap(), 0, dwSize);
1465 if (!outline) return FALSE;
1467 GetGlyphOutlineW(hdc, str[idx], GGO_GLYPH_INDEX | GGO_NATIVE, &gm, dwSize, outline, NULL);
1469 PATH_add_outline(dc, org.x + x + xoff, org.x + y + yoff, outline, dwSize);
1471 HeapFree(GetProcessHeap(), 0, outline);
1476 xoff = offset * cosEsc;
1477 yoff = offset * -sinEsc;
1481 xoff += gm.gmCellIncX;
1482 yoff += gm.gmCellIncY;
1490 * Removes all entries from the path and sets the path state to PATH_Null.
1492 static void PATH_EmptyPath(GdiPath *pPath)
1494 assert(pPath!=NULL);
1496 pPath->state=PATH_Null;
1497 pPath->numEntriesUsed=0;
1502 * Adds an entry to the path. For "flags", pass either PT_MOVETO, PT_LINETO
1503 * or PT_BEZIERTO, optionally ORed with PT_CLOSEFIGURE. Returns TRUE if
1504 * successful, FALSE otherwise (e.g. if not enough memory was available).
1506 BOOL PATH_AddEntry(GdiPath *pPath, const POINT *pPoint, BYTE flags)
1508 assert(pPath!=NULL);
1510 /* FIXME: If newStroke is true, perhaps we want to check that we're
1511 * getting a PT_MOVETO
1513 TRACE("(%d,%d) - %d\n", pPoint->x, pPoint->y, flags);
1515 /* Check that path is open */
1516 if(pPath->state!=PATH_Open)
1519 /* Reserve enough memory for an extra path entry */
1520 if(!PATH_ReserveEntries(pPath, pPath->numEntriesUsed+1))
1523 /* Store information in path entry */
1524 pPath->pPoints[pPath->numEntriesUsed]=*pPoint;
1525 pPath->pFlags[pPath->numEntriesUsed]=flags;
1527 /* If this is PT_CLOSEFIGURE, we have to start a new stroke next time */
1528 if((flags & PT_CLOSEFIGURE) == PT_CLOSEFIGURE)
1529 pPath->newStroke=TRUE;
1531 /* Increment entry count */
1532 pPath->numEntriesUsed++;
1537 /* PATH_ReserveEntries
1539 * Ensures that at least "numEntries" entries (for points and flags) have
1540 * been allocated; allocates larger arrays and copies the existing entries
1541 * to those arrays, if necessary. Returns TRUE if successful, else FALSE.
1543 static BOOL PATH_ReserveEntries(GdiPath *pPath, INT numEntries)
1545 INT numEntriesToAllocate;
1549 assert(pPath!=NULL);
1550 assert(numEntries>=0);
1552 /* Do we have to allocate more memory? */
1553 if(numEntries > pPath->numEntriesAllocated)
1555 /* Find number of entries to allocate. We let the size of the array
1556 * grow exponentially, since that will guarantee linear time
1558 if(pPath->numEntriesAllocated)
1560 numEntriesToAllocate=pPath->numEntriesAllocated;
1561 while(numEntriesToAllocate<numEntries)
1562 numEntriesToAllocate=numEntriesToAllocate*GROW_FACTOR_NUMER/
1566 numEntriesToAllocate=numEntries;
1568 /* Allocate new arrays */
1569 pPointsNew=HeapAlloc( GetProcessHeap(), 0, numEntriesToAllocate * sizeof(POINT) );
1572 pFlagsNew=HeapAlloc( GetProcessHeap(), 0, numEntriesToAllocate * sizeof(BYTE) );
1575 HeapFree( GetProcessHeap(), 0, pPointsNew );
1579 /* Copy old arrays to new arrays and discard old arrays */
1582 assert(pPath->pFlags);
1584 memcpy(pPointsNew, pPath->pPoints,
1585 sizeof(POINT)*pPath->numEntriesUsed);
1586 memcpy(pFlagsNew, pPath->pFlags,
1587 sizeof(BYTE)*pPath->numEntriesUsed);
1589 HeapFree( GetProcessHeap(), 0, pPath->pPoints );
1590 HeapFree( GetProcessHeap(), 0, pPath->pFlags );
1592 pPath->pPoints=pPointsNew;
1593 pPath->pFlags=pFlagsNew;
1594 pPath->numEntriesAllocated=numEntriesToAllocate;
1602 * Creates a Bezier spline that corresponds to part of an arc and appends the
1603 * corresponding points to the path. The start and end angles are passed in
1604 * "angleStart" and "angleEnd"; these angles should span a quarter circle
1605 * at most. If "startEntryType" is non-zero, an entry of that type for the first
1606 * control point is added to the path; otherwise, it is assumed that the current
1607 * position is equal to the first control point.
1609 static BOOL PATH_DoArcPart(GdiPath *pPath, FLOAT_POINT corners[],
1610 double angleStart, double angleEnd, BYTE startEntryType)
1612 double halfAngle, a;
1613 double xNorm[4], yNorm[4];
1617 assert(fabs(angleEnd-angleStart)<=M_PI_2);
1619 /* FIXME: Is there an easier way of computing this? */
1621 /* Compute control points */
1622 halfAngle=(angleEnd-angleStart)/2.0;
1623 if(fabs(halfAngle)>1e-8)
1625 a=4.0/3.0*(1-cos(halfAngle))/sin(halfAngle);
1626 xNorm[0]=cos(angleStart);
1627 yNorm[0]=sin(angleStart);
1628 xNorm[1]=xNorm[0] - a*yNorm[0];
1629 yNorm[1]=yNorm[0] + a*xNorm[0];
1630 xNorm[3]=cos(angleEnd);
1631 yNorm[3]=sin(angleEnd);
1632 xNorm[2]=xNorm[3] + a*yNorm[3];
1633 yNorm[2]=yNorm[3] - a*xNorm[3];
1638 xNorm[i]=cos(angleStart);
1639 yNorm[i]=sin(angleStart);
1642 /* Add starting point to path if desired */
1645 PATH_ScaleNormalizedPoint(corners, xNorm[0], yNorm[0], &point);
1646 if(!PATH_AddEntry(pPath, &point, startEntryType))
1650 /* Add remaining control points */
1653 PATH_ScaleNormalizedPoint(corners, xNorm[i], yNorm[i], &point);
1654 if(!PATH_AddEntry(pPath, &point, PT_BEZIERTO))
1661 /* PATH_ScaleNormalizedPoint
1663 * Scales a normalized point (x, y) with respect to the box whose corners are
1664 * passed in "corners". The point is stored in "*pPoint". The normalized
1665 * coordinates (-1.0, -1.0) correspond to corners[0], the coordinates
1666 * (1.0, 1.0) correspond to corners[1].
1668 static void PATH_ScaleNormalizedPoint(FLOAT_POINT corners[], double x,
1669 double y, POINT *pPoint)
1671 pPoint->x=GDI_ROUND( (double)corners[0].x +
1672 (double)(corners[1].x-corners[0].x)*0.5*(x+1.0) );
1673 pPoint->y=GDI_ROUND( (double)corners[0].y +
1674 (double)(corners[1].y-corners[0].y)*0.5*(y+1.0) );
1677 /* PATH_NormalizePoint
1679 * Normalizes a point with respect to the box whose corners are passed in
1680 * "corners". The normalized coordinates are stored in "*pX" and "*pY".
1682 static void PATH_NormalizePoint(FLOAT_POINT corners[],
1683 const FLOAT_POINT *pPoint,
1684 double *pX, double *pY)
1686 *pX=(double)(pPoint->x-corners[0].x)/(double)(corners[1].x-corners[0].x) *
1688 *pY=(double)(pPoint->y-corners[0].y)/(double)(corners[1].y-corners[0].y) *
1693 /*******************************************************************
1694 * FlattenPath [GDI32.@]
1698 BOOL WINAPI FlattenPath(HDC hdc)
1701 DC *dc = DC_GetDCPtr( hdc );
1703 if(!dc) return FALSE;
1705 if(dc->funcs->pFlattenPath) ret = dc->funcs->pFlattenPath(dc->physDev);
1708 GdiPath *pPath = &dc->path;
1709 if(pPath->state != PATH_Closed)
1710 ret = PATH_FlattenPath(pPath);
1712 DC_ReleaseDCPtr( dc );
1717 static BOOL PATH_StrokePath(DC *dc, GdiPath *pPath)
1719 INT i, nLinePts, nAlloc;
1721 POINT ptViewportOrg, ptWindowOrg;
1722 SIZE szViewportExt, szWindowExt;
1723 DWORD mapMode, graphicsMode;
1727 if(dc->funcs->pStrokePath)
1728 return dc->funcs->pStrokePath(dc->physDev);
1730 if(pPath->state != PATH_Closed)
1733 /* Save the mapping mode info */
1734 mapMode=GetMapMode(dc->hSelf);
1735 GetViewportExtEx(dc->hSelf, &szViewportExt);
1736 GetViewportOrgEx(dc->hSelf, &ptViewportOrg);
1737 GetWindowExtEx(dc->hSelf, &szWindowExt);
1738 GetWindowOrgEx(dc->hSelf, &ptWindowOrg);
1739 GetWorldTransform(dc->hSelf, &xform);
1742 SetMapMode(dc->hSelf, MM_TEXT);
1743 SetViewportOrgEx(dc->hSelf, 0, 0, NULL);
1744 SetWindowOrgEx(dc->hSelf, 0, 0, NULL);
1745 graphicsMode=GetGraphicsMode(dc->hSelf);
1746 SetGraphicsMode(dc->hSelf, GM_ADVANCED);
1747 ModifyWorldTransform(dc->hSelf, &xform, MWT_IDENTITY);
1748 SetGraphicsMode(dc->hSelf, graphicsMode);
1750 /* Allocate enough memory for the worst case without beziers (one PT_MOVETO
1751 * and the rest PT_LINETO with PT_CLOSEFIGURE at the end) plus some buffer
1752 * space in case we get one to keep the number of reallocations small. */
1753 nAlloc = pPath->numEntriesUsed + 1 + 300;
1754 pLinePts = HeapAlloc(GetProcessHeap(), 0, nAlloc * sizeof(POINT));
1757 for(i = 0; i < pPath->numEntriesUsed; i++) {
1758 if((i == 0 || (pPath->pFlags[i-1] & PT_CLOSEFIGURE)) &&
1759 (pPath->pFlags[i] != PT_MOVETO)) {
1760 ERR("Expected PT_MOVETO %s, got path flag %d\n",
1761 i == 0 ? "as first point" : "after PT_CLOSEFIGURE",
1762 (INT)pPath->pFlags[i]);
1766 switch(pPath->pFlags[i]) {
1768 TRACE("Got PT_MOVETO (%d, %d)\n",
1769 pPath->pPoints[i].x, pPath->pPoints[i].y);
1771 Polyline(dc->hSelf, pLinePts, nLinePts);
1773 pLinePts[nLinePts++] = pPath->pPoints[i];
1776 case (PT_LINETO | PT_CLOSEFIGURE):
1777 TRACE("Got PT_LINETO (%d, %d)\n",
1778 pPath->pPoints[i].x, pPath->pPoints[i].y);
1779 pLinePts[nLinePts++] = pPath->pPoints[i];
1782 TRACE("Got PT_BEZIERTO\n");
1783 if(pPath->pFlags[i+1] != PT_BEZIERTO ||
1784 (pPath->pFlags[i+2] & ~PT_CLOSEFIGURE) != PT_BEZIERTO) {
1785 ERR("Path didn't contain 3 successive PT_BEZIERTOs\n");
1789 INT nBzrPts, nMinAlloc;
1790 POINT *pBzrPts = GDI_Bezier(&pPath->pPoints[i-1], 4, &nBzrPts);
1791 /* Make sure we have allocated enough memory for the lines of
1792 * this bezier and the rest of the path, assuming we won't get
1793 * another one (since we won't reallocate again then). */
1794 nMinAlloc = nLinePts + (pPath->numEntriesUsed - i) + nBzrPts;
1795 if(nAlloc < nMinAlloc)
1797 nAlloc = nMinAlloc * 2;
1798 pLinePts = HeapReAlloc(GetProcessHeap(), 0, pLinePts,
1799 nAlloc * sizeof(POINT));
1801 memcpy(&pLinePts[nLinePts], &pBzrPts[1],
1802 (nBzrPts - 1) * sizeof(POINT));
1803 nLinePts += nBzrPts - 1;
1804 HeapFree(GetProcessHeap(), 0, pBzrPts);
1809 ERR("Got path flag %d\n", (INT)pPath->pFlags[i]);
1813 if(pPath->pFlags[i] & PT_CLOSEFIGURE)
1814 pLinePts[nLinePts++] = pLinePts[0];
1817 Polyline(dc->hSelf, pLinePts, nLinePts);
1820 HeapFree(GetProcessHeap(), 0, pLinePts);
1822 /* Restore the old mapping mode */
1823 SetMapMode(dc->hSelf, mapMode);
1824 SetWindowExtEx(dc->hSelf, szWindowExt.cx, szWindowExt.cy, NULL);
1825 SetWindowOrgEx(dc->hSelf, ptWindowOrg.x, ptWindowOrg.y, NULL);
1826 SetViewportExtEx(dc->hSelf, szViewportExt.cx, szViewportExt.cy, NULL);
1827 SetViewportOrgEx(dc->hSelf, ptViewportOrg.x, ptViewportOrg.y, NULL);
1829 /* Go to GM_ADVANCED temporarily to restore the world transform */
1830 graphicsMode=GetGraphicsMode(dc->hSelf);
1831 SetGraphicsMode(dc->hSelf, GM_ADVANCED);
1832 SetWorldTransform(dc->hSelf, &xform);
1833 SetGraphicsMode(dc->hSelf, graphicsMode);
1835 /* If we've moved the current point then get its new position
1836 which will be in device (MM_TEXT) co-ords, convert it to
1837 logical co-ords and re-set it. This basically updates
1838 dc->CurPosX|Y so that their values are in the correct mapping
1843 GetCurrentPositionEx(dc->hSelf, &pt);
1844 DPtoLP(dc->hSelf, &pt, 1);
1845 MoveToEx(dc->hSelf, pt.x, pt.y, NULL);
1851 #define round(x) ((int)((x)>0?(x)+0.5:(x)-0.5))
1853 static BOOL PATH_WidenPath(DC *dc)
1855 INT i, j, numStrokes, nLinePts, penWidth, penWidthIn, penWidthOut, size, penStyle;
1857 GdiPath *pPath, *pNewPath, **pStrokes, *pUpPath, *pDownPath;
1859 DWORD obj_type, joint, endcap, penType;
1863 if(pPath->state == PATH_Open) {
1864 SetLastError(ERROR_CAN_NOT_COMPLETE);
1868 PATH_FlattenPath(pPath);
1870 size = GetObjectW( dc->hPen, 0, NULL );
1872 SetLastError(ERROR_CAN_NOT_COMPLETE);
1876 elp = HeapAlloc( GetProcessHeap(), 0, size );
1877 GetObjectW( dc->hPen, size, elp );
1879 obj_type = GetObjectType(dc->hPen);
1880 if(obj_type == OBJ_PEN) {
1881 penStyle = ((LOGPEN*)elp)->lopnStyle;
1883 else if(obj_type == OBJ_EXTPEN) {
1884 penStyle = elp->elpPenStyle;
1887 SetLastError(ERROR_CAN_NOT_COMPLETE);
1888 HeapFree( GetProcessHeap(), 0, elp );
1892 penWidth = elp->elpWidth;
1893 HeapFree( GetProcessHeap(), 0, elp );
1895 endcap = (PS_ENDCAP_MASK & penStyle);
1896 joint = (PS_JOIN_MASK & penStyle);
1897 penType = (PS_TYPE_MASK & penStyle);
1899 /* The function cannot apply to cosmetic pens */
1900 if(obj_type == OBJ_EXTPEN && penType == PS_COSMETIC) {
1901 SetLastError(ERROR_CAN_NOT_COMPLETE);
1905 /* pen width must be strictly higher than 1 */
1910 penWidthIn = penWidth / 2;
1911 penWidthOut = penWidth / 2;
1912 if(penWidthIn + penWidthOut < penWidth)
1918 pStrokes = HeapAlloc(GetProcessHeap(), 0, numStrokes * sizeof(GdiPath*));
1919 pStrokes[0] = HeapAlloc(GetProcessHeap(), 0, sizeof(GdiPath));
1920 PATH_InitGdiPath(pStrokes[0]);
1921 pStrokes[0]->pFlags = HeapAlloc(GetProcessHeap(), 0, pPath->numEntriesUsed * sizeof(INT));
1922 pStrokes[0]->pPoints = HeapAlloc(GetProcessHeap(), 0, pPath->numEntriesUsed * sizeof(POINT));
1923 pStrokes[0]->numEntriesUsed = 0;
1925 for(i = 0, j = 0; i < pPath->numEntriesUsed; i++, j++) {
1927 if((i == 0 || (pPath->pFlags[i-1] & PT_CLOSEFIGURE)) &&
1928 (pPath->pFlags[i] != PT_MOVETO)) {
1929 ERR("Expected PT_MOVETO %s, got path flag %c\n",
1930 i == 0 ? "as first point" : "after PT_CLOSEFIGURE",
1934 switch(pPath->pFlags[i]) {
1936 if(numStrokes > 0) {
1937 pStrokes[numStrokes - 1]->state = PATH_Closed;
1941 pStrokes = HeapReAlloc(GetProcessHeap(), 0, pStrokes, numStrokes * sizeof(GdiPath*));
1942 pStrokes[numStrokes - 1] = HeapAlloc(GetProcessHeap(), 0, sizeof(GdiPath));
1943 PATH_InitGdiPath(pStrokes[numStrokes - 1]);
1944 pStrokes[numStrokes - 1]->state = PATH_Open;
1946 case (PT_LINETO | PT_CLOSEFIGURE):
1947 point.x = pPath->pPoints[i].x;
1948 point.y = pPath->pPoints[i].y;
1949 PATH_AddEntry(pStrokes[numStrokes - 1], &point, pPath->pFlags[i]);
1952 /* should never happen because of the FlattenPath call */
1953 ERR("Should never happen\n");
1956 ERR("Got path flag %c\n", pPath->pFlags[i]);
1961 pNewPath = HeapAlloc(GetProcessHeap(), 0, sizeof(GdiPath));
1962 PATH_InitGdiPath(pNewPath);
1963 pNewPath->state = PATH_Open;
1965 for(i = 0; i < numStrokes; i++) {
1966 pUpPath = HeapAlloc(GetProcessHeap(), 0, sizeof(GdiPath));
1967 PATH_InitGdiPath(pUpPath);
1968 pUpPath->state = PATH_Open;
1969 pDownPath = HeapAlloc(GetProcessHeap(), 0, sizeof(GdiPath));
1970 PATH_InitGdiPath(pDownPath);
1971 pDownPath->state = PATH_Open;
1973 for(j = 0; j < pStrokes[i]->numEntriesUsed; j++) {
1974 /* Beginning or end of the path if not closed */
1975 if((!(pStrokes[i]->pFlags[pStrokes[i]->numEntriesUsed - 1] & PT_CLOSEFIGURE)) && (j == 0 || j == pStrokes[i]->numEntriesUsed - 1) ) {
1976 /* Compute segment angle */
1977 FLOAT xo, yo, xa, ya;
1979 FLOAT theta, scalarProduct;
1980 FLOAT_POINT corners[2];
1982 xo = pStrokes[i]->pPoints[j].x;
1983 yo = pStrokes[i]->pPoints[j].y;
1984 xa = pStrokes[i]->pPoints[1].x;
1985 ya = pStrokes[i]->pPoints[1].y;
1988 xa = pStrokes[i]->pPoints[j - 1].x;
1989 ya = pStrokes[i]->pPoints[j - 1].y;
1990 xo = pStrokes[i]->pPoints[j].x;
1991 yo = pStrokes[i]->pPoints[j].y;
1993 scalarProduct = (xa - xo) /sqrt(pow((xa - xo), 2) + pow((ya - yo), 2));
1994 theta = acos(scalarProduct);
1995 if( (ya - yo) < 0) {
1999 case PS_ENDCAP_SQUARE :
2000 pt.x = xo + round(sqrt(2) * penWidthOut * cos(M_PI_4 + theta));
2001 pt.y = yo + round(sqrt(2) * penWidthOut * sin(M_PI_4 + theta));
2002 PATH_AddEntry(pUpPath, &pt, (j == 0 ? PT_MOVETO : PT_LINETO) );
2003 pt.x = xo + round(sqrt(2) * penWidthIn * cos(- M_PI_4 + theta));
2004 pt.y = yo + round(sqrt(2) * penWidthIn * sin(- M_PI_4 + theta));
2005 PATH_AddEntry(pUpPath, &pt, PT_LINETO);
2007 case PS_ENDCAP_FLAT :
2008 pt.x = xo + round( penWidthOut * cos(theta + M_PI_2) );
2009 pt.y = yo + round( penWidthOut * sin(theta + M_PI_2) );
2010 PATH_AddEntry(pUpPath, &pt, (j == 0 ? PT_MOVETO : PT_LINETO));
2011 pt.x = xo - round( penWidthIn * cos(theta + M_PI_2) );
2012 pt.y = yo - round( penWidthIn * sin(theta + M_PI_2) );
2013 PATH_AddEntry(pUpPath, &pt, PT_LINETO);
2015 case PS_ENDCAP_ROUND :
2017 corners[0].x = xo - penWidthIn;
2018 corners[0].y = yo - penWidthIn;
2019 corners[1].x = xo + penWidthOut;
2020 corners[1].y = yo + penWidthOut;
2021 PATH_DoArcPart(pUpPath ,corners, theta + M_PI_2 , theta + 3 * M_PI_4, (j == 0 ? PT_MOVETO : FALSE));
2022 PATH_DoArcPart(pUpPath ,corners, theta + 3 * M_PI_4 , theta + M_PI, FALSE);
2023 PATH_DoArcPart(pUpPath ,corners, theta + M_PI, theta + 5 * M_PI_4, FALSE);
2024 PATH_DoArcPart(pUpPath ,corners, theta + 5 * M_PI_4 , theta + 3 * M_PI_2, FALSE);
2028 /* Corpse of the path */
2032 FLOAT xa, ya, xb, yb, xo, yo;
2034 FLOAT scalarProduct, oa, ob, miterWidth;
2035 DWORD _joint = joint;
2037 GdiPath *pInsidePath, *pOutsidePath;
2038 if(j > 0 && j < pStrokes[i]->numEntriesUsed - 1) {
2043 previous = pStrokes[i]->numEntriesUsed - 1;
2050 xo = pStrokes[i]->pPoints[j].x;
2051 yo = pStrokes[i]->pPoints[j].y;
2052 xa = pStrokes[i]->pPoints[previous].x;
2053 ya = pStrokes[i]->pPoints[previous].y;
2054 xb = pStrokes[i]->pPoints[next].x;
2055 yb = pStrokes[i]->pPoints[next].y;
2056 oa = sqrt(pow((xa - xo), 2) + pow((ya - yo), 2));
2057 ob = sqrt(pow((xb - xo), 2) + pow((yb - yo), 2));
2058 scalarProduct = ((xa - xo) * (xb - xo) + (ya - yo) * (yb - yo))/ (oa * ob);
2059 alpha = acos(scalarProduct);
2060 if(( (xa - xo) * (yb - yo) - (ya - yo) * (xb - xo) ) < 0) {
2063 scalarProduct = (xo - xa) / oa;
2064 theta = acos(scalarProduct);
2065 if( (yo - ya) < 0) {
2068 if(_joint == PS_JOIN_MITER && dc->miterLimit < fabs(1 / sin(alpha/2))) {
2069 _joint = PS_JOIN_BEVEL;
2072 pInsidePath = pUpPath;
2073 pOutsidePath = pDownPath;
2075 else if(alpha < 0) {
2076 pInsidePath = pDownPath;
2077 pOutsidePath = pUpPath;
2082 /* Inside angle points */
2084 pt.x = xo - round( penWidthIn * cos(theta + M_PI_2) );
2085 pt.y = yo - round( penWidthIn * sin(theta + M_PI_2) );
2088 pt.x = xo + round( penWidthIn * cos(theta + M_PI_2) );
2089 pt.y = yo + round( penWidthIn * sin(theta + M_PI_2) );
2091 PATH_AddEntry(pInsidePath, &pt, PT_LINETO);
2093 pt.x = xo + round( penWidthIn * cos(M_PI_2 + alpha + theta) );
2094 pt.y = yo + round( penWidthIn * sin(M_PI_2 + alpha + theta) );
2097 pt.x = xo - round( penWidthIn * cos(M_PI_2 + alpha + theta) );
2098 pt.y = yo - round( penWidthIn * sin(M_PI_2 + alpha + theta) );
2100 PATH_AddEntry(pInsidePath, &pt, PT_LINETO);
2101 /* Outside angle point */
2103 case PS_JOIN_MITER :
2104 miterWidth = fabs(penWidthOut / cos(M_PI_2 - fabs(alpha) / 2));
2105 pt.x = xo + round( miterWidth * cos(theta + alpha / 2) );
2106 pt.y = yo + round( miterWidth * sin(theta + alpha / 2) );
2107 PATH_AddEntry(pOutsidePath, &pt, PT_LINETO);
2109 case PS_JOIN_BEVEL :
2111 pt.x = xo + round( penWidthOut * cos(theta + M_PI_2) );
2112 pt.y = yo + round( penWidthOut * sin(theta + M_PI_2) );
2115 pt.x = xo - round( penWidthOut * cos(theta + M_PI_2) );
2116 pt.y = yo - round( penWidthOut * sin(theta + M_PI_2) );
2118 PATH_AddEntry(pOutsidePath, &pt, PT_LINETO);
2120 pt.x = xo - round( penWidthOut * cos(M_PI_2 + alpha + theta) );
2121 pt.y = yo - round( penWidthOut * sin(M_PI_2 + alpha + theta) );
2124 pt.x = xo + round( penWidthOut * cos(M_PI_2 + alpha + theta) );
2125 pt.y = yo + round( penWidthOut * sin(M_PI_2 + alpha + theta) );
2127 PATH_AddEntry(pOutsidePath, &pt, PT_LINETO);
2129 case PS_JOIN_ROUND :
2132 pt.x = xo + round( penWidthOut * cos(theta + M_PI_2) );
2133 pt.y = yo + round( penWidthOut * sin(theta + M_PI_2) );
2136 pt.x = xo - round( penWidthOut * cos(theta + M_PI_2) );
2137 pt.y = yo - round( penWidthOut * sin(theta + M_PI_2) );
2139 PATH_AddEntry(pOutsidePath, &pt, PT_BEZIERTO);
2140 pt.x = xo + round( penWidthOut * cos(theta + alpha / 2) );
2141 pt.y = yo + round( penWidthOut * sin(theta + alpha / 2) );
2142 PATH_AddEntry(pOutsidePath, &pt, PT_BEZIERTO);
2144 pt.x = xo - round( penWidthOut * cos(M_PI_2 + alpha + theta) );
2145 pt.y = yo - round( penWidthOut * sin(M_PI_2 + alpha + theta) );
2148 pt.x = xo + round( penWidthOut * cos(M_PI_2 + alpha + theta) );
2149 pt.y = yo + round( penWidthOut * sin(M_PI_2 + alpha + theta) );
2151 PATH_AddEntry(pOutsidePath, &pt, PT_BEZIERTO);
2156 for(j = 0; j < pUpPath->numEntriesUsed; j++) {
2158 pt.x = pUpPath->pPoints[j].x;
2159 pt.y = pUpPath->pPoints[j].y;
2160 PATH_AddEntry(pNewPath, &pt, (j == 0 ? PT_MOVETO : PT_LINETO));
2162 for(j = 0; j < pDownPath->numEntriesUsed; j++) {
2164 pt.x = pDownPath->pPoints[pDownPath->numEntriesUsed - j - 1].x;
2165 pt.y = pDownPath->pPoints[pDownPath->numEntriesUsed - j - 1].y;
2166 PATH_AddEntry(pNewPath, &pt, ( (j == 0 && (pStrokes[i]->pFlags[pStrokes[i]->numEntriesUsed - 1] & PT_CLOSEFIGURE)) ? PT_MOVETO : PT_LINETO));
2169 PATH_DestroyGdiPath(pStrokes[i]);
2170 HeapFree(GetProcessHeap(), 0, pStrokes[i]);
2171 PATH_DestroyGdiPath(pUpPath);
2172 HeapFree(GetProcessHeap(), 0, pUpPath);
2173 PATH_DestroyGdiPath(pDownPath);
2174 HeapFree(GetProcessHeap(), 0, pDownPath);
2176 HeapFree(GetProcessHeap(), 0, pStrokes);
2178 pNewPath->state = PATH_Closed;
2179 if (!(ret = PATH_AssignGdiPath(pPath, pNewPath)))
2180 ERR("Assign path failed\n");
2181 PATH_DestroyGdiPath(pNewPath);
2182 HeapFree(GetProcessHeap(), 0, pNewPath);
2187 /*******************************************************************
2188 * StrokeAndFillPath [GDI32.@]
2192 BOOL WINAPI StrokeAndFillPath(HDC hdc)
2194 DC *dc = DC_GetDCPtr( hdc );
2197 if(!dc) return FALSE;
2199 if(dc->funcs->pStrokeAndFillPath)
2200 bRet = dc->funcs->pStrokeAndFillPath(dc->physDev);
2203 bRet = PATH_FillPath(dc, &dc->path);
2204 if(bRet) bRet = PATH_StrokePath(dc, &dc->path);
2205 if(bRet) PATH_EmptyPath(&dc->path);
2207 DC_ReleaseDCPtr( dc );
2212 /*******************************************************************
2213 * StrokePath [GDI32.@]
2217 BOOL WINAPI StrokePath(HDC hdc)
2219 DC *dc = DC_GetDCPtr( hdc );
2223 TRACE("(%p)\n", hdc);
2224 if(!dc) return FALSE;
2226 if(dc->funcs->pStrokePath)
2227 bRet = dc->funcs->pStrokePath(dc->physDev);
2231 bRet = PATH_StrokePath(dc, pPath);
2232 PATH_EmptyPath(pPath);
2234 DC_ReleaseDCPtr( dc );
2239 /*******************************************************************
2240 * WidenPath [GDI32.@]
2244 BOOL WINAPI WidenPath(HDC hdc)
2246 DC *dc = DC_GetDCPtr( hdc );
2249 if(!dc) return FALSE;
2251 if(dc->funcs->pWidenPath)
2252 ret = dc->funcs->pWidenPath(dc->physDev);
2254 ret = PATH_WidenPath(dc);
2255 DC_ReleaseDCPtr( dc );