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1680 lines
46 KiB
C
1680 lines
46 KiB
C
/*
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* Graphics paths (BeginPath, EndPath etc.)
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*
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* Copyright 1997, 1998 Martin Boehme
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* 1999 Huw D M Davies
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "config.h"
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#include "wine/port.h"
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#include <assert.h>
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#include <math.h>
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#include <stdarg.h>
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#include <string.h>
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#if defined(HAVE_FLOAT_H)
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#include <float.h>
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#endif
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#include "windef.h"
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#include "winbase.h"
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#include "wingdi.h"
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#include "winerror.h"
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#include "gdi.h"
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#include "gdi_private.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(gdi);
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/* Notes on the implementation
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*
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* The implementation is based on dynamically resizable arrays of points and
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* flags. I dithered for a bit before deciding on this implementation, and
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* I had even done a bit of work on a linked list version before switching
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* to arrays. It's a bit of a tradeoff. When you use linked lists, the
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* implementation of FlattenPath is easier, because you can rip the
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* PT_BEZIERTO entries out of the middle of the list and link the
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* corresponding PT_LINETO entries in. However, when you use arrays,
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* PathToRegion becomes easier, since you can essentially just pass your array
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* of points to CreatePolyPolygonRgn. Also, if I'd used linked lists, I would
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* have had the extra effort of creating a chunk-based allocation scheme
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* in order to use memory effectively. That's why I finally decided to use
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* arrays. Note by the way that the array based implementation has the same
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* linear time complexity that linked lists would have since the arrays grow
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* exponentially.
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*
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* The points are stored in the path in device coordinates. This is
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* consistent with the way Windows does things (for instance, see the Win32
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* SDK documentation for GetPath).
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*
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* The word "stroke" appears in several places (e.g. in the flag
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* GdiPath.newStroke). A stroke consists of a PT_MOVETO followed by one or
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* more PT_LINETOs or PT_BEZIERTOs, up to, but not including, the next
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* PT_MOVETO. Note that this is not the same as the definition of a figure;
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* a figure can contain several strokes.
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*
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* I modified the drawing functions (MoveTo, LineTo etc.) to test whether
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* the path is open and to call the corresponding function in path.c if this
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* is the case. A more elegant approach would be to modify the function
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* pointers in the DC_FUNCTIONS structure; however, this would be a lot more
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* complex. Also, the performance degradation caused by my approach in the
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* case where no path is open is so small that it cannot be measured.
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*
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* Martin Boehme
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*/
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/* FIXME: A lot of stuff isn't implemented yet. There is much more to come. */
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#define NUM_ENTRIES_INITIAL 16 /* Initial size of points / flags arrays */
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#define GROW_FACTOR_NUMER 2 /* Numerator of grow factor for the array */
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#define GROW_FACTOR_DENOM 1 /* Denominator of grow factor */
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/* A floating point version of the POINT structure */
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typedef struct tagFLOAT_POINT
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{
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FLOAT x, y;
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} FLOAT_POINT;
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static BOOL PATH_PathToRegion(GdiPath *pPath, INT nPolyFillMode,
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HRGN *pHrgn);
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static void PATH_EmptyPath(GdiPath *pPath);
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static BOOL PATH_ReserveEntries(GdiPath *pPath, INT numEntries);
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static BOOL PATH_DoArcPart(GdiPath *pPath, FLOAT_POINT corners[],
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double angleStart, double angleEnd, BOOL addMoveTo);
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static void PATH_ScaleNormalizedPoint(FLOAT_POINT corners[], double x,
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double y, POINT *pPoint);
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static void PATH_NormalizePoint(FLOAT_POINT corners[], const FLOAT_POINT
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*pPoint, double *pX, double *pY);
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static BOOL PATH_CheckCorners(DC *dc, POINT corners[], INT x1, INT y1, INT x2, INT y2);
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/* Performs a world-to-viewport transformation on the specified point (which
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* is in floating point format).
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*/
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static inline void INTERNAL_LPTODP_FLOAT(DC *dc, FLOAT_POINT *point)
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{
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FLOAT x, y;
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/* Perform the transformation */
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x = point->x;
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y = point->y;
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point->x = x * dc->xformWorld2Vport.eM11 +
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y * dc->xformWorld2Vport.eM21 +
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dc->xformWorld2Vport.eDx;
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point->y = x * dc->xformWorld2Vport.eM12 +
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y * dc->xformWorld2Vport.eM22 +
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dc->xformWorld2Vport.eDy;
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}
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/* Performs a world-to-viewport transformation on the specified width.
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*/
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static inline void INTERNAL_WSTODS(DC *dc, DWORD *width)
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{
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POINT pt[2];
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pt[0].x = pt[0].y = 0;
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pt[1].x = *width;
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pt[1].y = 0;
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LPtoDP(dc->hSelf, pt, 2);
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*width = pt[1].x - pt[0].x;
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}
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/***********************************************************************
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* BeginPath (GDI32.@)
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*/
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BOOL WINAPI BeginPath(HDC hdc)
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{
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BOOL ret = TRUE;
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DC *dc = DC_GetDCPtr( hdc );
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if(!dc) return FALSE;
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if(dc->funcs->pBeginPath)
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ret = dc->funcs->pBeginPath(dc->physDev);
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else
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{
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/* If path is already open, do nothing */
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if(dc->path.state != PATH_Open)
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{
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/* Make sure that path is empty */
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PATH_EmptyPath(&dc->path);
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/* Initialize variables for new path */
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dc->path.newStroke=TRUE;
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dc->path.state=PATH_Open;
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}
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}
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GDI_ReleaseObj( hdc );
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return ret;
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}
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/***********************************************************************
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* EndPath (GDI32.@)
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*/
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BOOL WINAPI EndPath(HDC hdc)
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{
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BOOL ret = TRUE;
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DC *dc = DC_GetDCPtr( hdc );
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if(!dc) return FALSE;
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if(dc->funcs->pEndPath)
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ret = dc->funcs->pEndPath(dc->physDev);
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else
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{
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/* Check that path is currently being constructed */
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if(dc->path.state!=PATH_Open)
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{
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SetLastError(ERROR_CAN_NOT_COMPLETE);
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ret = FALSE;
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}
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/* Set flag to indicate that path is finished */
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else dc->path.state=PATH_Closed;
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}
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GDI_ReleaseObj( hdc );
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return ret;
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}
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/******************************************************************************
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* AbortPath [GDI32.@]
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* Closes and discards paths from device context
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*
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* NOTES
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* Check that SetLastError is being called correctly
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*
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* PARAMS
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* hdc [I] Handle to device context
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*
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* RETURNS STD
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*/
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BOOL WINAPI AbortPath( HDC hdc )
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{
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BOOL ret = TRUE;
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DC *dc = DC_GetDCPtr( hdc );
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if(!dc) return FALSE;
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if(dc->funcs->pAbortPath)
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ret = dc->funcs->pAbortPath(dc->physDev);
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else /* Remove all entries from the path */
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PATH_EmptyPath( &dc->path );
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GDI_ReleaseObj( hdc );
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return ret;
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}
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/***********************************************************************
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* CloseFigure (GDI32.@)
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*
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* FIXME: Check that SetLastError is being called correctly
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*/
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BOOL WINAPI CloseFigure(HDC hdc)
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{
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BOOL ret = TRUE;
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DC *dc = DC_GetDCPtr( hdc );
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if(!dc) return FALSE;
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if(dc->funcs->pCloseFigure)
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ret = dc->funcs->pCloseFigure(dc->physDev);
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else
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{
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/* Check that path is open */
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if(dc->path.state!=PATH_Open)
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{
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SetLastError(ERROR_CAN_NOT_COMPLETE);
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ret = FALSE;
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}
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else
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{
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/* FIXME: Shouldn't we draw a line to the beginning of the
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figure? */
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/* Set PT_CLOSEFIGURE on the last entry and start a new stroke */
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if(dc->path.numEntriesUsed)
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{
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dc->path.pFlags[dc->path.numEntriesUsed-1]|=PT_CLOSEFIGURE;
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dc->path.newStroke=TRUE;
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}
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}
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}
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GDI_ReleaseObj( hdc );
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return ret;
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}
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/***********************************************************************
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* GetPath (GDI32.@)
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*/
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INT WINAPI GetPath(HDC hdc, LPPOINT pPoints, LPBYTE pTypes,
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INT nSize)
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{
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INT ret = -1;
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GdiPath *pPath;
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DC *dc = DC_GetDCPtr( hdc );
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if(!dc) return -1;
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pPath = &dc->path;
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/* Check that path is closed */
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if(pPath->state!=PATH_Closed)
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{
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SetLastError(ERROR_CAN_NOT_COMPLETE);
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goto done;
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}
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if(nSize==0)
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ret = pPath->numEntriesUsed;
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else if(nSize<pPath->numEntriesUsed)
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{
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SetLastError(ERROR_INVALID_PARAMETER);
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goto done;
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}
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else
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{
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memcpy(pPoints, pPath->pPoints, sizeof(POINT)*pPath->numEntriesUsed);
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memcpy(pTypes, pPath->pFlags, sizeof(BYTE)*pPath->numEntriesUsed);
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/* Convert the points to logical coordinates */
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if(!DPtoLP(hdc, pPoints, pPath->numEntriesUsed))
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{
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/* FIXME: Is this the correct value? */
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SetLastError(ERROR_CAN_NOT_COMPLETE);
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goto done;
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}
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else ret = pPath->numEntriesUsed;
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}
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done:
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GDI_ReleaseObj( hdc );
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return ret;
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}
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/***********************************************************************
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* PathToRegion (GDI32.@)
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*
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* FIXME
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* Check that SetLastError is being called correctly
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*
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* The documentation does not state this explicitly, but a test under Windows
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* shows that the region which is returned should be in device coordinates.
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*/
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HRGN WINAPI PathToRegion(HDC hdc)
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{
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GdiPath *pPath;
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HRGN hrgnRval = 0;
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DC *dc = DC_GetDCPtr( hdc );
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/* Get pointer to path */
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if(!dc) return 0;
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pPath = &dc->path;
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/* Check that path is closed */
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if(pPath->state!=PATH_Closed) SetLastError(ERROR_CAN_NOT_COMPLETE);
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else
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{
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/* FIXME: Should we empty the path even if conversion failed? */
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if(PATH_PathToRegion(pPath, GetPolyFillMode(hdc), &hrgnRval))
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PATH_EmptyPath(pPath);
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else
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hrgnRval=0;
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}
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GDI_ReleaseObj( hdc );
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return hrgnRval;
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}
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static BOOL PATH_FillPath(DC *dc, GdiPath *pPath)
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{
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INT mapMode, graphicsMode;
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SIZE ptViewportExt, ptWindowExt;
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POINT ptViewportOrg, ptWindowOrg;
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XFORM xform;
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HRGN hrgn;
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if(dc->funcs->pFillPath)
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return dc->funcs->pFillPath(dc->physDev);
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/* Check that path is closed */
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if(pPath->state!=PATH_Closed)
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{
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SetLastError(ERROR_CAN_NOT_COMPLETE);
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return FALSE;
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}
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/* Construct a region from the path and fill it */
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if(PATH_PathToRegion(pPath, dc->polyFillMode, &hrgn))
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{
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/* Since PaintRgn interprets the region as being in logical coordinates
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* but the points we store for the path are already in device
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* coordinates, we have to set the mapping mode to MM_TEXT temporarily.
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* Using SaveDC to save information about the mapping mode / world
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* transform would be easier but would require more overhead, especially
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* now that SaveDC saves the current path.
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*/
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/* Save the information about the old mapping mode */
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mapMode=GetMapMode(dc->hSelf);
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GetViewportExtEx(dc->hSelf, &ptViewportExt);
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GetViewportOrgEx(dc->hSelf, &ptViewportOrg);
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GetWindowExtEx(dc->hSelf, &ptWindowExt);
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GetWindowOrgEx(dc->hSelf, &ptWindowOrg);
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/* Save world transform
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* NB: The Windows documentation on world transforms would lead one to
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* believe that this has to be done only in GM_ADVANCED; however, my
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* tests show that resetting the graphics mode to GM_COMPATIBLE does
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* not reset the world transform.
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*/
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GetWorldTransform(dc->hSelf, &xform);
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/* Set MM_TEXT */
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SetMapMode(dc->hSelf, MM_TEXT);
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SetViewportOrgEx(dc->hSelf, 0, 0, NULL);
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SetWindowOrgEx(dc->hSelf, 0, 0, NULL);
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graphicsMode=GetGraphicsMode(dc->hSelf);
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SetGraphicsMode(dc->hSelf, GM_ADVANCED);
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ModifyWorldTransform(dc->hSelf, &xform, MWT_IDENTITY);
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SetGraphicsMode(dc->hSelf, graphicsMode);
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/* Paint the region */
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PaintRgn(dc->hSelf, hrgn);
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DeleteObject(hrgn);
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/* Restore the old mapping mode */
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SetMapMode(dc->hSelf, mapMode);
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SetViewportExtEx(dc->hSelf, ptViewportExt.cx, ptViewportExt.cy, NULL);
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SetViewportOrgEx(dc->hSelf, ptViewportOrg.x, ptViewportOrg.y, NULL);
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SetWindowExtEx(dc->hSelf, ptWindowExt.cx, ptWindowExt.cy, NULL);
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SetWindowOrgEx(dc->hSelf, ptWindowOrg.x, ptWindowOrg.y, NULL);
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/* Go to GM_ADVANCED temporarily to restore the world transform */
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graphicsMode=GetGraphicsMode(dc->hSelf);
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SetGraphicsMode(dc->hSelf, GM_ADVANCED);
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SetWorldTransform(dc->hSelf, &xform);
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SetGraphicsMode(dc->hSelf, graphicsMode);
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return TRUE;
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}
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return FALSE;
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}
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/***********************************************************************
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* FillPath (GDI32.@)
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*
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* FIXME
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* Check that SetLastError is being called correctly
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*/
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BOOL WINAPI FillPath(HDC hdc)
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{
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DC *dc = DC_GetDCPtr( hdc );
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BOOL bRet = FALSE;
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if(!dc) return FALSE;
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if(dc->funcs->pFillPath)
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bRet = dc->funcs->pFillPath(dc->physDev);
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else
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{
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bRet = PATH_FillPath(dc, &dc->path);
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if(bRet)
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{
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/* FIXME: Should the path be emptied even if conversion
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failed? */
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PATH_EmptyPath(&dc->path);
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}
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}
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GDI_ReleaseObj( hdc );
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return bRet;
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}
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|
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/***********************************************************************
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* SelectClipPath (GDI32.@)
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* FIXME
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* Check that SetLastError is being called correctly
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*/
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BOOL WINAPI SelectClipPath(HDC hdc, INT iMode)
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{
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GdiPath *pPath;
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HRGN hrgnPath;
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BOOL success = FALSE;
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DC *dc = DC_GetDCPtr( hdc );
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if(!dc) return FALSE;
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if(dc->funcs->pSelectClipPath)
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success = dc->funcs->pSelectClipPath(dc->physDev, iMode);
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else
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{
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pPath = &dc->path;
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/* Check that path is closed */
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if(pPath->state!=PATH_Closed)
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SetLastError(ERROR_CAN_NOT_COMPLETE);
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/* Construct a region from the path */
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else if(PATH_PathToRegion(pPath, GetPolyFillMode(hdc), &hrgnPath))
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{
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success = ExtSelectClipRgn( hdc, hrgnPath, iMode ) != ERROR;
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DeleteObject(hrgnPath);
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/* Empty the path */
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if(success)
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PATH_EmptyPath(pPath);
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/* FIXME: Should this function delete the path even if it failed? */
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}
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}
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GDI_ReleaseObj( hdc );
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return success;
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}
|
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|
|
|
|
/***********************************************************************
|
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* Exported functions
|
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*/
|
|
|
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/* PATH_InitGdiPath
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|
*
|
|
* Initializes the GdiPath structure.
|
|
*/
|
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void PATH_InitGdiPath(GdiPath *pPath)
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{
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assert(pPath!=NULL);
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|
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pPath->state=PATH_Null;
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pPath->pPoints=NULL;
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pPath->pFlags=NULL;
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pPath->numEntriesUsed=0;
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pPath->numEntriesAllocated=0;
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}
|
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|
|
/* PATH_DestroyGdiPath
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|
*
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* Destroys a GdiPath structure (frees the memory in the arrays).
|
|
*/
|
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void PATH_DestroyGdiPath(GdiPath *pPath)
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|
{
|
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assert(pPath!=NULL);
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|
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HeapFree( GetProcessHeap(), 0, pPath->pPoints );
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HeapFree( GetProcessHeap(), 0, pPath->pFlags );
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}
|
|
|
|
/* PATH_AssignGdiPath
|
|
*
|
|
* Copies the GdiPath structure "pPathSrc" to "pPathDest". A deep copy is
|
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* performed, i.e. the contents of the pPoints and pFlags arrays are copied,
|
|
* not just the pointers. Since this means that the arrays in pPathDest may
|
|
* need to be resized, pPathDest should have been initialized using
|
|
* PATH_InitGdiPath (in C++, this function would be an assignment operator,
|
|
* not a copy constructor).
|
|
* Returns TRUE if successful, else FALSE.
|
|
*/
|
|
BOOL PATH_AssignGdiPath(GdiPath *pPathDest, const GdiPath *pPathSrc)
|
|
{
|
|
assert(pPathDest!=NULL && pPathSrc!=NULL);
|
|
|
|
/* Make sure destination arrays are big enough */
|
|
if(!PATH_ReserveEntries(pPathDest, pPathSrc->numEntriesUsed))
|
|
return FALSE;
|
|
|
|
/* Perform the copy operation */
|
|
memcpy(pPathDest->pPoints, pPathSrc->pPoints,
|
|
sizeof(POINT)*pPathSrc->numEntriesUsed);
|
|
memcpy(pPathDest->pFlags, pPathSrc->pFlags,
|
|
sizeof(BYTE)*pPathSrc->numEntriesUsed);
|
|
|
|
pPathDest->state=pPathSrc->state;
|
|
pPathDest->numEntriesUsed=pPathSrc->numEntriesUsed;
|
|
pPathDest->newStroke=pPathSrc->newStroke;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* PATH_MoveTo
|
|
*
|
|
* Should be called when a MoveTo is performed on a DC that has an
|
|
* open path. This starts a new stroke. Returns TRUE if successful, else
|
|
* FALSE.
|
|
*/
|
|
BOOL PATH_MoveTo(DC *dc)
|
|
{
|
|
GdiPath *pPath = &dc->path;
|
|
|
|
/* Check that path is open */
|
|
if(pPath->state!=PATH_Open)
|
|
/* FIXME: Do we have to call SetLastError? */
|
|
return FALSE;
|
|
|
|
/* Start a new stroke */
|
|
pPath->newStroke=TRUE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* PATH_LineTo
|
|
*
|
|
* Should be called when a LineTo is performed on a DC that has an
|
|
* open path. This adds a PT_LINETO entry to the path (and possibly
|
|
* a PT_MOVETO entry, if this is the first LineTo in a stroke).
|
|
* Returns TRUE if successful, else FALSE.
|
|
*/
|
|
BOOL PATH_LineTo(DC *dc, INT x, INT y)
|
|
{
|
|
GdiPath *pPath = &dc->path;
|
|
POINT point, pointCurPos;
|
|
|
|
/* Check that path is open */
|
|
if(pPath->state!=PATH_Open)
|
|
return FALSE;
|
|
|
|
/* Convert point to device coordinates */
|
|
point.x=x;
|
|
point.y=y;
|
|
if(!LPtoDP(dc->hSelf, &point, 1))
|
|
return FALSE;
|
|
|
|
/* Add a PT_MOVETO if necessary */
|
|
if(pPath->newStroke)
|
|
{
|
|
pPath->newStroke=FALSE;
|
|
pointCurPos.x = dc->CursPosX;
|
|
pointCurPos.y = dc->CursPosY;
|
|
if(!LPtoDP(dc->hSelf, &pointCurPos, 1))
|
|
return FALSE;
|
|
if(!PATH_AddEntry(pPath, &pointCurPos, PT_MOVETO))
|
|
return FALSE;
|
|
}
|
|
|
|
/* Add a PT_LINETO entry */
|
|
return PATH_AddEntry(pPath, &point, PT_LINETO);
|
|
}
|
|
|
|
/* PATH_RoundRect
|
|
*
|
|
* Should be called when a call to RoundRect is performed on a DC that has
|
|
* an open path. Returns TRUE if successful, else FALSE.
|
|
*
|
|
* FIXME: it adds the same entries to the path as windows does, but there
|
|
* is an error in the bezier drawing code so that there are small pixel-size
|
|
* gaps when the resulting path is drawn by StrokePath()
|
|
*/
|
|
BOOL PATH_RoundRect(DC *dc, INT x1, INT y1, INT x2, INT y2, INT ell_width, INT ell_height)
|
|
{
|
|
GdiPath *pPath = &dc->path;
|
|
POINT corners[2], pointTemp;
|
|
FLOAT_POINT ellCorners[2];
|
|
|
|
/* Check that path is open */
|
|
if(pPath->state!=PATH_Open)
|
|
return FALSE;
|
|
|
|
if(!PATH_CheckCorners(dc,corners,x1,y1,x2,y2))
|
|
return FALSE;
|
|
|
|
/* Add points to the roundrect path */
|
|
ellCorners[0].x = corners[1].x-ell_width;
|
|
ellCorners[0].y = corners[0].y;
|
|
ellCorners[1].x = corners[1].x;
|
|
ellCorners[1].y = corners[0].y+ell_height;
|
|
if(!PATH_DoArcPart(pPath, ellCorners, 0, -M_PI_2, TRUE))
|
|
return FALSE;
|
|
pointTemp.x = corners[0].x+ell_width/2;
|
|
pointTemp.y = corners[0].y;
|
|
if(!PATH_AddEntry(pPath, &pointTemp, PT_LINETO))
|
|
return FALSE;
|
|
ellCorners[0].x = corners[0].x;
|
|
ellCorners[1].x = corners[0].x+ell_width;
|
|
if(!PATH_DoArcPart(pPath, ellCorners, -M_PI_2, -M_PI, FALSE))
|
|
return FALSE;
|
|
pointTemp.x = corners[0].x;
|
|
pointTemp.y = corners[1].y-ell_height/2;
|
|
if(!PATH_AddEntry(pPath, &pointTemp, PT_LINETO))
|
|
return FALSE;
|
|
ellCorners[0].y = corners[1].y-ell_height;
|
|
ellCorners[1].y = corners[1].y;
|
|
if(!PATH_DoArcPart(pPath, ellCorners, M_PI, M_PI_2, FALSE))
|
|
return FALSE;
|
|
pointTemp.x = corners[1].x-ell_width/2;
|
|
pointTemp.y = corners[1].y;
|
|
if(!PATH_AddEntry(pPath, &pointTemp, PT_LINETO))
|
|
return FALSE;
|
|
ellCorners[0].x = corners[1].x-ell_width;
|
|
ellCorners[1].x = corners[1].x;
|
|
if(!PATH_DoArcPart(pPath, ellCorners, M_PI_2, 0, FALSE))
|
|
return FALSE;
|
|
|
|
/* Close the roundrect figure */
|
|
if(!CloseFigure(dc->hSelf))
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* PATH_Rectangle
|
|
*
|
|
* Should be called when a call to Rectangle is performed on a DC that has
|
|
* an open path. Returns TRUE if successful, else FALSE.
|
|
*/
|
|
BOOL PATH_Rectangle(DC *dc, INT x1, INT y1, INT x2, INT y2)
|
|
{
|
|
GdiPath *pPath = &dc->path;
|
|
POINT corners[2], pointTemp;
|
|
|
|
/* Check that path is open */
|
|
if(pPath->state!=PATH_Open)
|
|
return FALSE;
|
|
|
|
if(!PATH_CheckCorners(dc,corners,x1,y1,x2,y2))
|
|
return FALSE;
|
|
|
|
/* Close any previous figure */
|
|
if(!CloseFigure(dc->hSelf))
|
|
{
|
|
/* The CloseFigure call shouldn't have failed */
|
|
assert(FALSE);
|
|
return FALSE;
|
|
}
|
|
|
|
/* Add four points to the path */
|
|
pointTemp.x=corners[1].x;
|
|
pointTemp.y=corners[0].y;
|
|
if(!PATH_AddEntry(pPath, &pointTemp, PT_MOVETO))
|
|
return FALSE;
|
|
if(!PATH_AddEntry(pPath, corners, PT_LINETO))
|
|
return FALSE;
|
|
pointTemp.x=corners[0].x;
|
|
pointTemp.y=corners[1].y;
|
|
if(!PATH_AddEntry(pPath, &pointTemp, PT_LINETO))
|
|
return FALSE;
|
|
if(!PATH_AddEntry(pPath, corners+1, PT_LINETO))
|
|
return FALSE;
|
|
|
|
/* Close the rectangle figure */
|
|
if(!CloseFigure(dc->hSelf))
|
|
{
|
|
/* The CloseFigure call shouldn't have failed */
|
|
assert(FALSE);
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* PATH_Ellipse
|
|
*
|
|
* Should be called when a call to Ellipse is performed on a DC that has
|
|
* an open path. This adds four Bezier splines representing the ellipse
|
|
* to the path. Returns TRUE if successful, else FALSE.
|
|
*/
|
|
BOOL PATH_Ellipse(DC *dc, INT x1, INT y1, INT x2, INT y2)
|
|
{
|
|
return( PATH_Arc(dc, x1, y1, x2, y2, x1, (y1+y2)/2, x1, (y1+y2)/2,0) &&
|
|
CloseFigure(dc->hSelf) );
|
|
}
|
|
|
|
/* PATH_Arc
|
|
*
|
|
* Should be called when a call to Arc is performed on a DC that has
|
|
* an open path. This adds up to five Bezier splines representing the arc
|
|
* to the path. When 'lines' is 1, we add 1 extra line to get a chord,
|
|
* and when 'lines' is 2, we add 2 extra lines to get a pie.
|
|
* Returns TRUE if successful, else FALSE.
|
|
*/
|
|
BOOL PATH_Arc(DC *dc, INT x1, INT y1, INT x2, INT y2,
|
|
INT xStart, INT yStart, INT xEnd, INT yEnd, INT lines)
|
|
{
|
|
GdiPath *pPath = &dc->path;
|
|
double angleStart, angleEnd, angleStartQuadrant, angleEndQuadrant=0.0;
|
|
/* Initialize angleEndQuadrant to silence gcc's warning */
|
|
double x, y;
|
|
FLOAT_POINT corners[2], pointStart, pointEnd;
|
|
POINT centre;
|
|
BOOL start, end;
|
|
INT temp;
|
|
|
|
/* FIXME: This function should check for all possible error returns */
|
|
/* FIXME: Do we have to respect newStroke? */
|
|
|
|
/* Check that path is open */
|
|
if(pPath->state!=PATH_Open)
|
|
return FALSE;
|
|
|
|
/* Check for zero height / width */
|
|
/* FIXME: Only in GM_COMPATIBLE? */
|
|
if(x1==x2 || y1==y2)
|
|
return TRUE;
|
|
|
|
/* Convert points to device coordinates */
|
|
corners[0].x=(FLOAT)x1;
|
|
corners[0].y=(FLOAT)y1;
|
|
corners[1].x=(FLOAT)x2;
|
|
corners[1].y=(FLOAT)y2;
|
|
pointStart.x=(FLOAT)xStart;
|
|
pointStart.y=(FLOAT)yStart;
|
|
pointEnd.x=(FLOAT)xEnd;
|
|
pointEnd.y=(FLOAT)yEnd;
|
|
INTERNAL_LPTODP_FLOAT(dc, corners);
|
|
INTERNAL_LPTODP_FLOAT(dc, corners+1);
|
|
INTERNAL_LPTODP_FLOAT(dc, &pointStart);
|
|
INTERNAL_LPTODP_FLOAT(dc, &pointEnd);
|
|
|
|
/* Make sure first corner is top left and second corner is bottom right */
|
|
if(corners[0].x>corners[1].x)
|
|
{
|
|
temp=corners[0].x;
|
|
corners[0].x=corners[1].x;
|
|
corners[1].x=temp;
|
|
}
|
|
if(corners[0].y>corners[1].y)
|
|
{
|
|
temp=corners[0].y;
|
|
corners[0].y=corners[1].y;
|
|
corners[1].y=temp;
|
|
}
|
|
|
|
/* Compute start and end angle */
|
|
PATH_NormalizePoint(corners, &pointStart, &x, &y);
|
|
angleStart=atan2(y, x);
|
|
PATH_NormalizePoint(corners, &pointEnd, &x, &y);
|
|
angleEnd=atan2(y, x);
|
|
|
|
/* Make sure the end angle is "on the right side" of the start angle */
|
|
if(dc->ArcDirection==AD_CLOCKWISE)
|
|
{
|
|
if(angleEnd<=angleStart)
|
|
{
|
|
angleEnd+=2*M_PI;
|
|
assert(angleEnd>=angleStart);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if(angleEnd>=angleStart)
|
|
{
|
|
angleEnd-=2*M_PI;
|
|
assert(angleEnd<=angleStart);
|
|
}
|
|
}
|
|
|
|
/* In GM_COMPATIBLE, don't include bottom and right edges */
|
|
if(dc->GraphicsMode==GM_COMPATIBLE)
|
|
{
|
|
corners[1].x--;
|
|
corners[1].y--;
|
|
}
|
|
|
|
/* Add the arc to the path with one Bezier spline per quadrant that the
|
|
* arc spans */
|
|
start=TRUE;
|
|
end=FALSE;
|
|
do
|
|
{
|
|
/* Determine the start and end angles for this quadrant */
|
|
if(start)
|
|
{
|
|
angleStartQuadrant=angleStart;
|
|
if(dc->ArcDirection==AD_CLOCKWISE)
|
|
angleEndQuadrant=(floor(angleStart/M_PI_2)+1.0)*M_PI_2;
|
|
else
|
|
angleEndQuadrant=(ceil(angleStart/M_PI_2)-1.0)*M_PI_2;
|
|
}
|
|
else
|
|
{
|
|
angleStartQuadrant=angleEndQuadrant;
|
|
if(dc->ArcDirection==AD_CLOCKWISE)
|
|
angleEndQuadrant+=M_PI_2;
|
|
else
|
|
angleEndQuadrant-=M_PI_2;
|
|
}
|
|
|
|
/* Have we reached the last part of the arc? */
|
|
if((dc->ArcDirection==AD_CLOCKWISE &&
|
|
angleEnd<angleEndQuadrant) ||
|
|
(dc->ArcDirection==AD_COUNTERCLOCKWISE &&
|
|
angleEnd>angleEndQuadrant))
|
|
{
|
|
/* Adjust the end angle for this quadrant */
|
|
angleEndQuadrant=angleEnd;
|
|
end=TRUE;
|
|
}
|
|
|
|
/* Add the Bezier spline to the path */
|
|
PATH_DoArcPart(pPath, corners, angleStartQuadrant, angleEndQuadrant,
|
|
start);
|
|
start=FALSE;
|
|
} while(!end);
|
|
|
|
/* chord: close figure. pie: add line and close figure */
|
|
if(lines==1)
|
|
{
|
|
if(!CloseFigure(dc->hSelf))
|
|
return FALSE;
|
|
}
|
|
else if(lines==2)
|
|
{
|
|
centre.x = (corners[0].x+corners[1].x)/2;
|
|
centre.y = (corners[0].y+corners[1].y)/2;
|
|
if(!PATH_AddEntry(pPath, ¢re, PT_LINETO | PT_CLOSEFIGURE))
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
BOOL PATH_PolyBezierTo(DC *dc, const POINT *pts, DWORD cbPoints)
|
|
{
|
|
GdiPath *pPath = &dc->path;
|
|
POINT pt;
|
|
UINT i;
|
|
|
|
/* Check that path is open */
|
|
if(pPath->state!=PATH_Open)
|
|
return FALSE;
|
|
|
|
/* Add a PT_MOVETO if necessary */
|
|
if(pPath->newStroke)
|
|
{
|
|
pPath->newStroke=FALSE;
|
|
pt.x = dc->CursPosX;
|
|
pt.y = dc->CursPosY;
|
|
if(!LPtoDP(dc->hSelf, &pt, 1))
|
|
return FALSE;
|
|
if(!PATH_AddEntry(pPath, &pt, PT_MOVETO))
|
|
return FALSE;
|
|
}
|
|
|
|
for(i = 0; i < cbPoints; i++) {
|
|
pt = pts[i];
|
|
if(!LPtoDP(dc->hSelf, &pt, 1))
|
|
return FALSE;
|
|
PATH_AddEntry(pPath, &pt, PT_BEZIERTO);
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
BOOL PATH_PolyBezier(DC *dc, const POINT *pts, DWORD cbPoints)
|
|
{
|
|
GdiPath *pPath = &dc->path;
|
|
POINT pt;
|
|
UINT i;
|
|
|
|
/* Check that path is open */
|
|
if(pPath->state!=PATH_Open)
|
|
return FALSE;
|
|
|
|
for(i = 0; i < cbPoints; i++) {
|
|
pt = pts[i];
|
|
if(!LPtoDP(dc->hSelf, &pt, 1))
|
|
return FALSE;
|
|
PATH_AddEntry(pPath, &pt, (i == 0) ? PT_MOVETO : PT_BEZIERTO);
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
BOOL PATH_Polyline(DC *dc, const POINT *pts, DWORD cbPoints)
|
|
{
|
|
GdiPath *pPath = &dc->path;
|
|
POINT pt;
|
|
UINT i;
|
|
|
|
/* Check that path is open */
|
|
if(pPath->state!=PATH_Open)
|
|
return FALSE;
|
|
|
|
for(i = 0; i < cbPoints; i++) {
|
|
pt = pts[i];
|
|
if(!LPtoDP(dc->hSelf, &pt, 1))
|
|
return FALSE;
|
|
PATH_AddEntry(pPath, &pt, (i == 0) ? PT_MOVETO : PT_LINETO);
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
BOOL PATH_PolylineTo(DC *dc, const POINT *pts, DWORD cbPoints)
|
|
{
|
|
GdiPath *pPath = &dc->path;
|
|
POINT pt;
|
|
UINT i;
|
|
|
|
/* Check that path is open */
|
|
if(pPath->state!=PATH_Open)
|
|
return FALSE;
|
|
|
|
/* Add a PT_MOVETO if necessary */
|
|
if(pPath->newStroke)
|
|
{
|
|
pPath->newStroke=FALSE;
|
|
pt.x = dc->CursPosX;
|
|
pt.y = dc->CursPosY;
|
|
if(!LPtoDP(dc->hSelf, &pt, 1))
|
|
return FALSE;
|
|
if(!PATH_AddEntry(pPath, &pt, PT_MOVETO))
|
|
return FALSE;
|
|
}
|
|
|
|
for(i = 0; i < cbPoints; i++) {
|
|
pt = pts[i];
|
|
if(!LPtoDP(dc->hSelf, &pt, 1))
|
|
return FALSE;
|
|
PATH_AddEntry(pPath, &pt, PT_LINETO);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
BOOL PATH_Polygon(DC *dc, const POINT *pts, DWORD cbPoints)
|
|
{
|
|
GdiPath *pPath = &dc->path;
|
|
POINT pt;
|
|
UINT i;
|
|
|
|
/* Check that path is open */
|
|
if(pPath->state!=PATH_Open)
|
|
return FALSE;
|
|
|
|
for(i = 0; i < cbPoints; i++) {
|
|
pt = pts[i];
|
|
if(!LPtoDP(dc->hSelf, &pt, 1))
|
|
return FALSE;
|
|
PATH_AddEntry(pPath, &pt, (i == 0) ? PT_MOVETO :
|
|
((i == cbPoints-1) ? PT_LINETO | PT_CLOSEFIGURE :
|
|
PT_LINETO));
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
BOOL PATH_PolyPolygon( DC *dc, const POINT* pts, const INT* counts,
|
|
UINT polygons )
|
|
{
|
|
GdiPath *pPath = &dc->path;
|
|
POINT pt, startpt;
|
|
UINT poly, i;
|
|
INT point;
|
|
|
|
/* Check that path is open */
|
|
if(pPath->state!=PATH_Open)
|
|
return FALSE;
|
|
|
|
for(i = 0, poly = 0; poly < polygons; poly++) {
|
|
for(point = 0; point < counts[poly]; point++, i++) {
|
|
pt = pts[i];
|
|
if(!LPtoDP(dc->hSelf, &pt, 1))
|
|
return FALSE;
|
|
if(point == 0) startpt = pt;
|
|
PATH_AddEntry(pPath, &pt, (point == 0) ? PT_MOVETO : PT_LINETO);
|
|
}
|
|
/* win98 adds an extra line to close the figure for some reason */
|
|
PATH_AddEntry(pPath, &startpt, PT_LINETO | PT_CLOSEFIGURE);
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
BOOL PATH_PolyPolyline( DC *dc, const POINT* pts, const DWORD* counts,
|
|
DWORD polylines )
|
|
{
|
|
GdiPath *pPath = &dc->path;
|
|
POINT pt;
|
|
UINT poly, point, i;
|
|
|
|
/* Check that path is open */
|
|
if(pPath->state!=PATH_Open)
|
|
return FALSE;
|
|
|
|
for(i = 0, poly = 0; poly < polylines; poly++) {
|
|
for(point = 0; point < counts[poly]; point++, i++) {
|
|
pt = pts[i];
|
|
if(!LPtoDP(dc->hSelf, &pt, 1))
|
|
return FALSE;
|
|
PATH_AddEntry(pPath, &pt, (point == 0) ? PT_MOVETO : PT_LINETO);
|
|
}
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* Internal functions
|
|
*/
|
|
|
|
/* PATH_CheckCorners
|
|
*
|
|
* Helper function for PATH_RoundRect() and PATH_Rectangle()
|
|
*/
|
|
static BOOL PATH_CheckCorners(DC *dc, POINT corners[], INT x1, INT y1, INT x2, INT y2)
|
|
{
|
|
INT temp;
|
|
|
|
/* Convert points to device coordinates */
|
|
corners[0].x=x1;
|
|
corners[0].y=y1;
|
|
corners[1].x=x2;
|
|
corners[1].y=y2;
|
|
if(!LPtoDP(dc->hSelf, corners, 2))
|
|
return FALSE;
|
|
|
|
/* Make sure first corner is top left and second corner is bottom right */
|
|
if(corners[0].x>corners[1].x)
|
|
{
|
|
temp=corners[0].x;
|
|
corners[0].x=corners[1].x;
|
|
corners[1].x=temp;
|
|
}
|
|
if(corners[0].y>corners[1].y)
|
|
{
|
|
temp=corners[0].y;
|
|
corners[0].y=corners[1].y;
|
|
corners[1].y=temp;
|
|
}
|
|
|
|
/* In GM_COMPATIBLE, don't include bottom and right edges */
|
|
if(dc->GraphicsMode==GM_COMPATIBLE)
|
|
{
|
|
corners[1].x--;
|
|
corners[1].y--;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* PATH_AddFlatBezier
|
|
*/
|
|
static BOOL PATH_AddFlatBezier(GdiPath *pPath, POINT *pt, BOOL closed)
|
|
{
|
|
POINT *pts;
|
|
INT no, i;
|
|
|
|
pts = GDI_Bezier( pt, 4, &no );
|
|
if(!pts) return FALSE;
|
|
|
|
for(i = 1; i < no; i++)
|
|
PATH_AddEntry(pPath, &pts[i],
|
|
(i == no-1 && closed) ? PT_LINETO | PT_CLOSEFIGURE : PT_LINETO);
|
|
HeapFree( GetProcessHeap(), 0, pts );
|
|
return TRUE;
|
|
}
|
|
|
|
/* PATH_FlattenPath
|
|
*
|
|
* Replaces Beziers with line segments
|
|
*
|
|
*/
|
|
static BOOL PATH_FlattenPath(GdiPath *pPath)
|
|
{
|
|
GdiPath newPath;
|
|
INT srcpt;
|
|
|
|
memset(&newPath, 0, sizeof(newPath));
|
|
newPath.state = PATH_Open;
|
|
for(srcpt = 0; srcpt < pPath->numEntriesUsed; srcpt++) {
|
|
switch(pPath->pFlags[srcpt] & ~PT_CLOSEFIGURE) {
|
|
case PT_MOVETO:
|
|
case PT_LINETO:
|
|
PATH_AddEntry(&newPath, &pPath->pPoints[srcpt],
|
|
pPath->pFlags[srcpt]);
|
|
break;
|
|
case PT_BEZIERTO:
|
|
PATH_AddFlatBezier(&newPath, &pPath->pPoints[srcpt-1],
|
|
pPath->pFlags[srcpt+2] & PT_CLOSEFIGURE);
|
|
srcpt += 2;
|
|
break;
|
|
}
|
|
}
|
|
newPath.state = PATH_Closed;
|
|
PATH_AssignGdiPath(pPath, &newPath);
|
|
PATH_DestroyGdiPath(&newPath);
|
|
return TRUE;
|
|
}
|
|
|
|
/* PATH_PathToRegion
|
|
*
|
|
* Creates a region from the specified path using the specified polygon
|
|
* filling mode. The path is left unchanged. A handle to the region that
|
|
* was created is stored in *pHrgn. If successful, TRUE is returned; if an
|
|
* error occurs, SetLastError is called with the appropriate value and
|
|
* FALSE is returned.
|
|
*/
|
|
static BOOL PATH_PathToRegion(GdiPath *pPath, INT nPolyFillMode,
|
|
HRGN *pHrgn)
|
|
{
|
|
int numStrokes, iStroke, i;
|
|
INT *pNumPointsInStroke;
|
|
HRGN hrgn;
|
|
|
|
assert(pPath!=NULL);
|
|
assert(pHrgn!=NULL);
|
|
|
|
PATH_FlattenPath(pPath);
|
|
|
|
/* FIXME: What happens when number of points is zero? */
|
|
|
|
/* First pass: Find out how many strokes there are in the path */
|
|
/* FIXME: We could eliminate this with some bookkeeping in GdiPath */
|
|
numStrokes=0;
|
|
for(i=0; i<pPath->numEntriesUsed; i++)
|
|
if((pPath->pFlags[i] & ~PT_CLOSEFIGURE) == PT_MOVETO)
|
|
numStrokes++;
|
|
|
|
/* Allocate memory for number-of-points-in-stroke array */
|
|
pNumPointsInStroke=HeapAlloc( GetProcessHeap(), 0, sizeof(int) * numStrokes );
|
|
if(!pNumPointsInStroke)
|
|
{
|
|
SetLastError(ERROR_NOT_ENOUGH_MEMORY);
|
|
return FALSE;
|
|
}
|
|
|
|
/* Second pass: remember number of points in each polygon */
|
|
iStroke=-1; /* Will get incremented to 0 at beginning of first stroke */
|
|
for(i=0; i<pPath->numEntriesUsed; i++)
|
|
{
|
|
/* Is this the beginning of a new stroke? */
|
|
if((pPath->pFlags[i] & ~PT_CLOSEFIGURE) == PT_MOVETO)
|
|
{
|
|
iStroke++;
|
|
pNumPointsInStroke[iStroke]=0;
|
|
}
|
|
|
|
pNumPointsInStroke[iStroke]++;
|
|
}
|
|
|
|
/* Create a region from the strokes */
|
|
hrgn=CreatePolyPolygonRgn(pPath->pPoints, pNumPointsInStroke,
|
|
numStrokes, nPolyFillMode);
|
|
|
|
/* Free memory for number-of-points-in-stroke array */
|
|
HeapFree( GetProcessHeap(), 0, pNumPointsInStroke );
|
|
|
|
if(hrgn==NULL)
|
|
{
|
|
SetLastError(ERROR_NOT_ENOUGH_MEMORY);
|
|
return FALSE;
|
|
}
|
|
|
|
/* Success! */
|
|
*pHrgn=hrgn;
|
|
return TRUE;
|
|
}
|
|
|
|
/* PATH_EmptyPath
|
|
*
|
|
* Removes all entries from the path and sets the path state to PATH_Null.
|
|
*/
|
|
static void PATH_EmptyPath(GdiPath *pPath)
|
|
{
|
|
assert(pPath!=NULL);
|
|
|
|
pPath->state=PATH_Null;
|
|
pPath->numEntriesUsed=0;
|
|
}
|
|
|
|
/* PATH_AddEntry
|
|
*
|
|
* Adds an entry to the path. For "flags", pass either PT_MOVETO, PT_LINETO
|
|
* or PT_BEZIERTO, optionally ORed with PT_CLOSEFIGURE. Returns TRUE if
|
|
* successful, FALSE otherwise (e.g. if not enough memory was available).
|
|
*/
|
|
BOOL PATH_AddEntry(GdiPath *pPath, const POINT *pPoint, BYTE flags)
|
|
{
|
|
assert(pPath!=NULL);
|
|
|
|
/* FIXME: If newStroke is true, perhaps we want to check that we're
|
|
* getting a PT_MOVETO
|
|
*/
|
|
TRACE("(%ld,%ld) - %d\n", pPoint->x, pPoint->y, flags);
|
|
|
|
/* Check that path is open */
|
|
if(pPath->state!=PATH_Open)
|
|
return FALSE;
|
|
|
|
/* Reserve enough memory for an extra path entry */
|
|
if(!PATH_ReserveEntries(pPath, pPath->numEntriesUsed+1))
|
|
return FALSE;
|
|
|
|
/* Store information in path entry */
|
|
pPath->pPoints[pPath->numEntriesUsed]=*pPoint;
|
|
pPath->pFlags[pPath->numEntriesUsed]=flags;
|
|
|
|
/* If this is PT_CLOSEFIGURE, we have to start a new stroke next time */
|
|
if((flags & PT_CLOSEFIGURE) == PT_CLOSEFIGURE)
|
|
pPath->newStroke=TRUE;
|
|
|
|
/* Increment entry count */
|
|
pPath->numEntriesUsed++;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* PATH_ReserveEntries
|
|
*
|
|
* Ensures that at least "numEntries" entries (for points and flags) have
|
|
* been allocated; allocates larger arrays and copies the existing entries
|
|
* to those arrays, if necessary. Returns TRUE if successful, else FALSE.
|
|
*/
|
|
static BOOL PATH_ReserveEntries(GdiPath *pPath, INT numEntries)
|
|
{
|
|
INT numEntriesToAllocate;
|
|
POINT *pPointsNew;
|
|
BYTE *pFlagsNew;
|
|
|
|
assert(pPath!=NULL);
|
|
assert(numEntries>=0);
|
|
|
|
/* Do we have to allocate more memory? */
|
|
if(numEntries > pPath->numEntriesAllocated)
|
|
{
|
|
/* Find number of entries to allocate. We let the size of the array
|
|
* grow exponentially, since that will guarantee linear time
|
|
* complexity. */
|
|
if(pPath->numEntriesAllocated)
|
|
{
|
|
numEntriesToAllocate=pPath->numEntriesAllocated;
|
|
while(numEntriesToAllocate<numEntries)
|
|
numEntriesToAllocate=numEntriesToAllocate*GROW_FACTOR_NUMER/
|
|
GROW_FACTOR_DENOM;
|
|
}
|
|
else
|
|
numEntriesToAllocate=numEntries;
|
|
|
|
/* Allocate new arrays */
|
|
pPointsNew=HeapAlloc( GetProcessHeap(), 0, numEntriesToAllocate * sizeof(POINT) );
|
|
if(!pPointsNew)
|
|
return FALSE;
|
|
pFlagsNew=HeapAlloc( GetProcessHeap(), 0, numEntriesToAllocate * sizeof(BYTE) );
|
|
if(!pFlagsNew)
|
|
{
|
|
HeapFree( GetProcessHeap(), 0, pPointsNew );
|
|
return FALSE;
|
|
}
|
|
|
|
/* Copy old arrays to new arrays and discard old arrays */
|
|
if(pPath->pPoints)
|
|
{
|
|
assert(pPath->pFlags);
|
|
|
|
memcpy(pPointsNew, pPath->pPoints,
|
|
sizeof(POINT)*pPath->numEntriesUsed);
|
|
memcpy(pFlagsNew, pPath->pFlags,
|
|
sizeof(BYTE)*pPath->numEntriesUsed);
|
|
|
|
HeapFree( GetProcessHeap(), 0, pPath->pPoints );
|
|
HeapFree( GetProcessHeap(), 0, pPath->pFlags );
|
|
}
|
|
pPath->pPoints=pPointsNew;
|
|
pPath->pFlags=pFlagsNew;
|
|
pPath->numEntriesAllocated=numEntriesToAllocate;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* PATH_DoArcPart
|
|
*
|
|
* Creates a Bezier spline that corresponds to part of an arc and appends the
|
|
* corresponding points to the path. The start and end angles are passed in
|
|
* "angleStart" and "angleEnd"; these angles should span a quarter circle
|
|
* at most. If "addMoveTo" is true, a PT_MOVETO entry for the first control
|
|
* point is added to the path; otherwise, it is assumed that the current
|
|
* position is equal to the first control point.
|
|
*/
|
|
static BOOL PATH_DoArcPart(GdiPath *pPath, FLOAT_POINT corners[],
|
|
double angleStart, double angleEnd, BOOL addMoveTo)
|
|
{
|
|
double halfAngle, a;
|
|
double xNorm[4], yNorm[4];
|
|
POINT point;
|
|
int i;
|
|
|
|
assert(fabs(angleEnd-angleStart)<=M_PI_2);
|
|
|
|
/* FIXME: Is there an easier way of computing this? */
|
|
|
|
/* Compute control points */
|
|
halfAngle=(angleEnd-angleStart)/2.0;
|
|
if(fabs(halfAngle)>1e-8)
|
|
{
|
|
a=4.0/3.0*(1-cos(halfAngle))/sin(halfAngle);
|
|
xNorm[0]=cos(angleStart);
|
|
yNorm[0]=sin(angleStart);
|
|
xNorm[1]=xNorm[0] - a*yNorm[0];
|
|
yNorm[1]=yNorm[0] + a*xNorm[0];
|
|
xNorm[3]=cos(angleEnd);
|
|
yNorm[3]=sin(angleEnd);
|
|
xNorm[2]=xNorm[3] + a*yNorm[3];
|
|
yNorm[2]=yNorm[3] - a*xNorm[3];
|
|
}
|
|
else
|
|
for(i=0; i<4; i++)
|
|
{
|
|
xNorm[i]=cos(angleStart);
|
|
yNorm[i]=sin(angleStart);
|
|
}
|
|
|
|
/* Add starting point to path if desired */
|
|
if(addMoveTo)
|
|
{
|
|
PATH_ScaleNormalizedPoint(corners, xNorm[0], yNorm[0], &point);
|
|
if(!PATH_AddEntry(pPath, &point, PT_MOVETO))
|
|
return FALSE;
|
|
}
|
|
|
|
/* Add remaining control points */
|
|
for(i=1; i<4; i++)
|
|
{
|
|
PATH_ScaleNormalizedPoint(corners, xNorm[i], yNorm[i], &point);
|
|
if(!PATH_AddEntry(pPath, &point, PT_BEZIERTO))
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* PATH_ScaleNormalizedPoint
|
|
*
|
|
* Scales a normalized point (x, y) with respect to the box whose corners are
|
|
* passed in "corners". The point is stored in "*pPoint". The normalized
|
|
* coordinates (-1.0, -1.0) correspond to corners[0], the coordinates
|
|
* (1.0, 1.0) correspond to corners[1].
|
|
*/
|
|
static void PATH_ScaleNormalizedPoint(FLOAT_POINT corners[], double x,
|
|
double y, POINT *pPoint)
|
|
{
|
|
pPoint->x=GDI_ROUND( (double)corners[0].x +
|
|
(double)(corners[1].x-corners[0].x)*0.5*(x+1.0) );
|
|
pPoint->y=GDI_ROUND( (double)corners[0].y +
|
|
(double)(corners[1].y-corners[0].y)*0.5*(y+1.0) );
|
|
}
|
|
|
|
/* PATH_NormalizePoint
|
|
*
|
|
* Normalizes a point with respect to the box whose corners are passed in
|
|
* "corners". The normalized coordinates are stored in "*pX" and "*pY".
|
|
*/
|
|
static void PATH_NormalizePoint(FLOAT_POINT corners[],
|
|
const FLOAT_POINT *pPoint,
|
|
double *pX, double *pY)
|
|
{
|
|
*pX=(double)(pPoint->x-corners[0].x)/(double)(corners[1].x-corners[0].x) *
|
|
2.0 - 1.0;
|
|
*pY=(double)(pPoint->y-corners[0].y)/(double)(corners[1].y-corners[0].y) *
|
|
2.0 - 1.0;
|
|
}
|
|
|
|
|
|
/*******************************************************************
|
|
* FlattenPath [GDI32.@]
|
|
*
|
|
*
|
|
*/
|
|
BOOL WINAPI FlattenPath(HDC hdc)
|
|
{
|
|
BOOL ret = FALSE;
|
|
DC *dc = DC_GetDCPtr( hdc );
|
|
|
|
if(!dc) return FALSE;
|
|
|
|
if(dc->funcs->pFlattenPath) ret = dc->funcs->pFlattenPath(dc->physDev);
|
|
else
|
|
{
|
|
GdiPath *pPath = &dc->path;
|
|
if(pPath->state != PATH_Closed)
|
|
ret = PATH_FlattenPath(pPath);
|
|
}
|
|
GDI_ReleaseObj( hdc );
|
|
return ret;
|
|
}
|
|
|
|
|
|
static BOOL PATH_StrokePath(DC *dc, GdiPath *pPath)
|
|
{
|
|
INT i, nLinePts, nAlloc;
|
|
POINT *pLinePts;
|
|
POINT ptViewportOrg, ptWindowOrg;
|
|
SIZE szViewportExt, szWindowExt;
|
|
DWORD mapMode, graphicsMode;
|
|
XFORM xform;
|
|
HGDIOBJ hOldPen;
|
|
HPEN hNewPen;
|
|
BOOL ret = TRUE;
|
|
|
|
if(dc->funcs->pStrokePath)
|
|
return dc->funcs->pStrokePath(dc->physDev);
|
|
|
|
if(pPath->state != PATH_Closed)
|
|
return FALSE;
|
|
|
|
/* Convert pen properties from logical to device units for MWT_IDENTITY */
|
|
hOldPen = GetCurrentObject(dc->hSelf, OBJ_PEN);
|
|
if(GetObjectType(hOldPen) == OBJ_EXTPEN) {
|
|
EXTLOGPEN elp;
|
|
LOGBRUSH lb;
|
|
GetObjectW(hOldPen, sizeof(EXTLOGPEN), &elp);
|
|
if(elp.elpPenStyle & PS_GEOMETRIC) {
|
|
INTERNAL_WSTODS(dc, &elp.elpWidth);
|
|
if(elp.elpPenStyle & PS_USERSTYLE)
|
|
for(i = 0; i < elp.elpNumEntries; i++)
|
|
INTERNAL_WSTODS(dc, &elp.elpStyleEntry[i]);
|
|
}
|
|
lb.lbStyle = elp.elpBrushStyle;
|
|
lb.lbColor = elp.elpColor;
|
|
lb.lbHatch = elp.elpHatch;
|
|
hNewPen = ExtCreatePen(elp.elpPenStyle, elp.elpWidth, &lb,
|
|
elp.elpNumEntries, elp.elpStyleEntry);
|
|
} else /* OBJ_PEN */ {
|
|
LOGPEN lp;
|
|
GetObjectW(hOldPen, sizeof(LOGPEN), &lp);
|
|
if(lp.lopnWidth.x > 0)
|
|
INTERNAL_WSTODS(dc, (DWORD*)&lp.lopnWidth.x);
|
|
hNewPen = CreatePenIndirect(&lp);
|
|
}
|
|
SelectObject(dc->hSelf, hNewPen);
|
|
|
|
/* Save the mapping mode info */
|
|
mapMode=GetMapMode(dc->hSelf);
|
|
GetViewportExtEx(dc->hSelf, &szViewportExt);
|
|
GetViewportOrgEx(dc->hSelf, &ptViewportOrg);
|
|
GetWindowExtEx(dc->hSelf, &szWindowExt);
|
|
GetWindowOrgEx(dc->hSelf, &ptWindowOrg);
|
|
GetWorldTransform(dc->hSelf, &xform);
|
|
|
|
/* Set MM_TEXT */
|
|
SetMapMode(dc->hSelf, MM_TEXT);
|
|
SetViewportOrgEx(dc->hSelf, 0, 0, NULL);
|
|
SetWindowOrgEx(dc->hSelf, 0, 0, NULL);
|
|
graphicsMode=GetGraphicsMode(dc->hSelf);
|
|
SetGraphicsMode(dc->hSelf, GM_ADVANCED);
|
|
ModifyWorldTransform(dc->hSelf, &xform, MWT_IDENTITY);
|
|
SetGraphicsMode(dc->hSelf, graphicsMode);
|
|
|
|
/* Allocate enough memory for the worst case without beziers (one PT_MOVETO
|
|
* and the rest PT_LINETO with PT_CLOSEFIGURE at the end) plus some buffer
|
|
* space in case we get one to keep the number of reallocations small. */
|
|
nAlloc = pPath->numEntriesUsed + 1 + 300;
|
|
pLinePts = HeapAlloc(GetProcessHeap(), 0, nAlloc * sizeof(POINT));
|
|
nLinePts = 0;
|
|
|
|
for(i = 0; i < pPath->numEntriesUsed; i++) {
|
|
if((i == 0 || (pPath->pFlags[i-1] & PT_CLOSEFIGURE)) &&
|
|
(pPath->pFlags[i] != PT_MOVETO)) {
|
|
ERR("Expected PT_MOVETO %s, got path flag %d\n",
|
|
i == 0 ? "as first point" : "after PT_CLOSEFIGURE",
|
|
(INT)pPath->pFlags[i]);
|
|
ret = FALSE;
|
|
goto end;
|
|
}
|
|
switch(pPath->pFlags[i]) {
|
|
case PT_MOVETO:
|
|
TRACE("Got PT_MOVETO (%ld, %ld)\n",
|
|
pPath->pPoints[i].x, pPath->pPoints[i].y);
|
|
if(nLinePts >= 2)
|
|
Polyline(dc->hSelf, pLinePts, nLinePts);
|
|
nLinePts = 0;
|
|
pLinePts[nLinePts++] = pPath->pPoints[i];
|
|
break;
|
|
case PT_LINETO:
|
|
case (PT_LINETO | PT_CLOSEFIGURE):
|
|
TRACE("Got PT_LINETO (%ld, %ld)\n",
|
|
pPath->pPoints[i].x, pPath->pPoints[i].y);
|
|
pLinePts[nLinePts++] = pPath->pPoints[i];
|
|
break;
|
|
case PT_BEZIERTO:
|
|
TRACE("Got PT_BEZIERTO\n");
|
|
if(pPath->pFlags[i+1] != PT_BEZIERTO ||
|
|
(pPath->pFlags[i+2] & ~PT_CLOSEFIGURE) != PT_BEZIERTO) {
|
|
ERR("Path didn't contain 3 successive PT_BEZIERTOs\n");
|
|
ret = FALSE;
|
|
goto end;
|
|
} else {
|
|
INT nBzrPts, nMinAlloc;
|
|
POINT *pBzrPts = GDI_Bezier(&pPath->pPoints[i-1], 4, &nBzrPts);
|
|
/* Make sure we have allocated enough memory for the lines of
|
|
* this bezier and the rest of the path, assuming we won't get
|
|
* another one (since we won't reallocate again then). */
|
|
nMinAlloc = nLinePts + (pPath->numEntriesUsed - i) + nBzrPts;
|
|
if(nAlloc < nMinAlloc)
|
|
{
|
|
nAlloc = nMinAlloc * 2;
|
|
pLinePts = HeapReAlloc(GetProcessHeap(), 0, pLinePts,
|
|
nAlloc * sizeof(POINT));
|
|
}
|
|
memcpy(&pLinePts[nLinePts], &pBzrPts[1],
|
|
(nBzrPts - 1) * sizeof(POINT));
|
|
nLinePts += nBzrPts - 1;
|
|
HeapFree(GetProcessHeap(), 0, pBzrPts);
|
|
i += 2;
|
|
}
|
|
break;
|
|
default:
|
|
ERR("Got path flag %d\n", (INT)pPath->pFlags[i]);
|
|
ret = FALSE;
|
|
goto end;
|
|
}
|
|
if(pPath->pFlags[i] & PT_CLOSEFIGURE)
|
|
pLinePts[nLinePts++] = pLinePts[0];
|
|
}
|
|
if(nLinePts >= 2)
|
|
Polyline(dc->hSelf, pLinePts, nLinePts);
|
|
|
|
end:
|
|
HeapFree(GetProcessHeap(), 0, pLinePts);
|
|
|
|
/* Restore the old mapping mode */
|
|
SetMapMode(dc->hSelf, mapMode);
|
|
SetViewportExtEx(dc->hSelf, szViewportExt.cx, szViewportExt.cy, NULL);
|
|
SetViewportOrgEx(dc->hSelf, ptViewportOrg.x, ptViewportOrg.y, NULL);
|
|
SetWindowExtEx(dc->hSelf, szWindowExt.cx, szWindowExt.cy, NULL);
|
|
SetWindowOrgEx(dc->hSelf, ptWindowOrg.x, ptWindowOrg.y, NULL);
|
|
|
|
/* Go to GM_ADVANCED temporarily to restore the world transform */
|
|
graphicsMode=GetGraphicsMode(dc->hSelf);
|
|
SetGraphicsMode(dc->hSelf, GM_ADVANCED);
|
|
SetWorldTransform(dc->hSelf, &xform);
|
|
SetGraphicsMode(dc->hSelf, graphicsMode);
|
|
|
|
/* If we've moved the current point then get its new position
|
|
which will be in device (MM_TEXT) co-ords, convert it to
|
|
logical co-ords and re-set it. This basically updates
|
|
dc->CurPosX|Y so that their values are in the correct mapping
|
|
mode.
|
|
*/
|
|
if(i > 0) {
|
|
POINT pt;
|
|
GetCurrentPositionEx(dc->hSelf, &pt);
|
|
DPtoLP(dc->hSelf, &pt, 1);
|
|
MoveToEx(dc->hSelf, pt.x, pt.y, NULL);
|
|
}
|
|
|
|
/* Restore old pen */
|
|
DeleteObject(hNewPen);
|
|
SelectObject(dc->hSelf, hOldPen);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*******************************************************************
|
|
* StrokeAndFillPath [GDI32.@]
|
|
*
|
|
*
|
|
*/
|
|
BOOL WINAPI StrokeAndFillPath(HDC hdc)
|
|
{
|
|
DC *dc = DC_GetDCPtr( hdc );
|
|
BOOL bRet = FALSE;
|
|
|
|
if(!dc) return FALSE;
|
|
|
|
if(dc->funcs->pStrokeAndFillPath)
|
|
bRet = dc->funcs->pStrokeAndFillPath(dc->physDev);
|
|
else
|
|
{
|
|
bRet = PATH_FillPath(dc, &dc->path);
|
|
if(bRet) bRet = PATH_StrokePath(dc, &dc->path);
|
|
if(bRet) PATH_EmptyPath(&dc->path);
|
|
}
|
|
GDI_ReleaseObj( hdc );
|
|
return bRet;
|
|
}
|
|
|
|
|
|
/*******************************************************************
|
|
* StrokePath [GDI32.@]
|
|
*
|
|
*
|
|
*/
|
|
BOOL WINAPI StrokePath(HDC hdc)
|
|
{
|
|
DC *dc = DC_GetDCPtr( hdc );
|
|
GdiPath *pPath;
|
|
BOOL bRet = FALSE;
|
|
|
|
TRACE("(%p)\n", hdc);
|
|
if(!dc) return FALSE;
|
|
|
|
if(dc->funcs->pStrokePath)
|
|
bRet = dc->funcs->pStrokePath(dc->physDev);
|
|
else
|
|
{
|
|
pPath = &dc->path;
|
|
bRet = PATH_StrokePath(dc, pPath);
|
|
PATH_EmptyPath(pPath);
|
|
}
|
|
GDI_ReleaseObj( hdc );
|
|
return bRet;
|
|
}
|
|
|
|
|
|
/*******************************************************************
|
|
* WidenPath [GDI32.@]
|
|
*
|
|
*
|
|
*/
|
|
BOOL WINAPI WidenPath(HDC hdc)
|
|
{
|
|
DC *dc = DC_GetDCPtr( hdc );
|
|
BOOL ret = FALSE;
|
|
|
|
if(!dc) return FALSE;
|
|
|
|
if(dc->funcs->pWidenPath)
|
|
ret = dc->funcs->pWidenPath(dc->physDev);
|
|
|
|
FIXME("stub\n");
|
|
GDI_ReleaseObj( hdc );
|
|
return ret;
|
|
}
|