1223 lines
34 KiB
C
1223 lines
34 KiB
C
/*
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* GDI drawing functions.
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*
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* Copyright 1993, 1994 Alexandre Julliard
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* Copyright 1997 Bertho A. Stultiens
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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 <stdarg.h>
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#include <string.h>
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#include <stdlib.h>
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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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/***********************************************************************
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* LineTo (GDI32.@)
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*/
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BOOL WINAPI LineTo( HDC hdc, INT x, INT y )
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{
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DC * dc = DC_GetDCUpdate( hdc );
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BOOL ret;
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if(!dc) return FALSE;
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if(PATH_IsPathOpen(dc->path))
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ret = PATH_LineTo(dc, x, y);
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else
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ret = dc->funcs->pLineTo && dc->funcs->pLineTo(dc->physDev,x,y);
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if(ret) {
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dc->CursPosX = x;
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dc->CursPosY = y;
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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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* MoveToEx (GDI32.@)
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*/
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BOOL WINAPI MoveToEx( HDC hdc, INT x, INT y, LPPOINT pt )
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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(pt) {
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pt->x = dc->CursPosX;
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pt->y = dc->CursPosY;
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}
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dc->CursPosX = x;
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dc->CursPosY = y;
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if(PATH_IsPathOpen(dc->path)) ret = PATH_MoveTo(dc);
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else if (dc->funcs->pMoveTo) ret = dc->funcs->pMoveTo(dc->physDev,x,y);
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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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* Arc (GDI32.@)
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*/
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BOOL WINAPI Arc( HDC hdc, INT left, INT top, INT right,
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INT bottom, INT xstart, INT ystart,
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INT xend, INT yend )
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{
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BOOL ret = FALSE;
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DC * dc = DC_GetDCUpdate( hdc );
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if (dc)
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{
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if(PATH_IsPathOpen(dc->path))
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ret = PATH_Arc(dc, left, top, right, bottom, xstart, ystart, xend, yend,0);
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else if (dc->funcs->pArc)
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ret = dc->funcs->pArc(dc->physDev,left,top,right,bottom,xstart,ystart,xend,yend);
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GDI_ReleaseObj( hdc );
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}
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return ret;
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}
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/***********************************************************************
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* ArcTo (GDI32.@)
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*/
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BOOL WINAPI ArcTo( HDC hdc,
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INT left, INT top,
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INT right, INT bottom,
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INT xstart, INT ystart,
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INT xend, INT yend )
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{
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BOOL result;
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DC * dc = DC_GetDCUpdate( hdc );
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if(!dc) return FALSE;
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if(dc->funcs->pArcTo)
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{
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result = dc->funcs->pArcTo( dc->physDev, left, top, right, bottom,
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xstart, ystart, xend, yend );
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GDI_ReleaseObj( hdc );
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return result;
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}
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GDI_ReleaseObj( hdc );
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/*
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* Else emulate it.
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* According to the documentation, a line is drawn from the current
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* position to the starting point of the arc.
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*/
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LineTo(hdc, xstart, ystart);
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/*
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* Then the arc is drawn.
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*/
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result = Arc(hdc, left, top, right, bottom, xstart, ystart, xend, yend);
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/*
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* If no error occurred, the current position is moved to the ending
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* point of the arc.
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*/
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if (result) MoveToEx(hdc, xend, yend, NULL);
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return result;
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}
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/***********************************************************************
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* Pie (GDI32.@)
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*/
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BOOL WINAPI Pie( HDC hdc, INT left, INT top,
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INT right, INT bottom, INT xstart, INT ystart,
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INT xend, INT yend )
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{
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BOOL ret = FALSE;
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DC * dc = DC_GetDCUpdate( hdc );
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if (!dc) return FALSE;
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if(PATH_IsPathOpen(dc->path))
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ret = PATH_Arc(dc,left,top,right,bottom,xstart,ystart,xend,yend,2);
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else if(dc->funcs->pPie)
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ret = dc->funcs->pPie(dc->physDev,left,top,right,bottom,xstart,ystart,xend,yend);
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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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* Chord (GDI32.@)
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*/
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BOOL WINAPI Chord( HDC hdc, INT left, INT top,
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INT right, INT bottom, INT xstart, INT ystart,
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INT xend, INT yend )
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{
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BOOL ret = FALSE;
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DC * dc = DC_GetDCUpdate( hdc );
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if (!dc) return FALSE;
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if(PATH_IsPathOpen(dc->path))
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ret = PATH_Arc(dc,left,top,right,bottom,xstart,ystart,xend,yend,1);
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else if(dc->funcs->pChord)
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ret = dc->funcs->pChord(dc->physDev,left,top,right,bottom,xstart,ystart,xend,yend);
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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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* Ellipse (GDI32.@)
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*/
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BOOL WINAPI Ellipse( HDC hdc, INT left, INT top,
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INT right, INT bottom )
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{
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BOOL ret = FALSE;
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DC * dc = DC_GetDCUpdate( hdc );
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if (!dc) return FALSE;
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if(PATH_IsPathOpen(dc->path))
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ret = PATH_Ellipse(dc,left,top,right,bottom);
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else if (dc->funcs->pEllipse)
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ret = dc->funcs->pEllipse(dc->physDev,left,top,right,bottom);
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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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* Rectangle (GDI32.@)
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*/
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BOOL WINAPI Rectangle( HDC hdc, INT left, INT top,
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INT right, INT bottom )
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{
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BOOL ret = FALSE;
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DC * dc = DC_GetDCUpdate( hdc );
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if (dc)
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{
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if(PATH_IsPathOpen(dc->path))
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ret = PATH_Rectangle(dc, left, top, right, bottom);
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else if (dc->funcs->pRectangle)
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ret = dc->funcs->pRectangle(dc->physDev,left,top,right,bottom);
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GDI_ReleaseObj( hdc );
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}
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return ret;
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}
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/***********************************************************************
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* RoundRect (GDI32.@)
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*/
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BOOL WINAPI RoundRect( HDC hdc, INT left, INT top, INT right,
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INT bottom, INT ell_width, INT ell_height )
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{
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BOOL ret = FALSE;
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DC *dc = DC_GetDCUpdate( hdc );
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if (dc)
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{
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if(PATH_IsPathOpen(dc->path))
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ret = PATH_RoundRect(dc,left,top,right,bottom,ell_width,ell_height);
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else if (dc->funcs->pRoundRect)
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ret = dc->funcs->pRoundRect(dc->physDev,left,top,right,bottom,ell_width,ell_height);
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GDI_ReleaseObj( hdc );
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}
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return ret;
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}
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/***********************************************************************
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* SetPixel (GDI32.@)
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*/
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COLORREF WINAPI SetPixel( HDC hdc, INT x, INT y, COLORREF color )
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{
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COLORREF ret = 0;
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DC * dc = DC_GetDCUpdate( hdc );
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if (dc)
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{
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if (dc->funcs->pSetPixel) ret = dc->funcs->pSetPixel(dc->physDev,x,y,color);
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GDI_ReleaseObj( hdc );
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}
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return ret;
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}
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/***********************************************************************
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* SetPixelV (GDI32.@)
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*/
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BOOL WINAPI SetPixelV( HDC hdc, INT x, INT y, COLORREF color )
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{
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BOOL ret = FALSE;
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DC * dc = DC_GetDCUpdate( hdc );
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if (dc)
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{
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if (dc->funcs->pSetPixel)
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{
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dc->funcs->pSetPixel(dc->physDev,x,y,color);
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ret = TRUE;
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}
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GDI_ReleaseObj( hdc );
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}
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return ret;
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}
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/***********************************************************************
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* GetPixel (GDI32.@)
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*/
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COLORREF WINAPI GetPixel( HDC hdc, INT x, INT y )
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{
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COLORREF ret = CLR_INVALID;
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DC * dc = DC_GetDCUpdate( hdc );
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if (dc)
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{
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/* FIXME: should this be in the graphics driver? */
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if (PtVisible( hdc, x, y ))
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{
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if (dc->funcs->pGetPixel) ret = dc->funcs->pGetPixel(dc->physDev,x,y);
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}
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GDI_ReleaseObj( hdc );
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}
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return ret;
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}
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/******************************************************************************
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* ChoosePixelFormat [GDI32.@]
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* Matches a pixel format to given format
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*
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* PARAMS
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* hdc [I] Device context to search for best pixel match
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* ppfd [I] Pixel format for which a match is sought
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*
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* RETURNS
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* Success: Pixel format index closest to given format
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* Failure: 0
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*/
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INT WINAPI ChoosePixelFormat( HDC hdc, const LPPIXELFORMATDESCRIPTOR ppfd )
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{
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INT ret = 0;
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DC * dc = DC_GetDCPtr( hdc );
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TRACE("(%p,%p)\n",hdc,ppfd);
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if (!dc) return 0;
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if (!dc->funcs->pChoosePixelFormat) FIXME(" :stub\n");
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else ret = dc->funcs->pChoosePixelFormat(dc->physDev,ppfd);
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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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* SetPixelFormat [GDI32.@]
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* Sets pixel format of device context
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*
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* PARAMS
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* hdc [I] Device context to search for best pixel match
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* iPixelFormat [I] Pixel format index
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* ppfd [I] Pixel format for which a match is sought
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*
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* RETURNS STD
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*/
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BOOL WINAPI SetPixelFormat( HDC hdc, INT iPixelFormat,
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const PIXELFORMATDESCRIPTOR *ppfd)
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{
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INT bRet = FALSE;
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DC * dc = DC_GetDCPtr( hdc );
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TRACE("(%p,%d,%p)\n",hdc,iPixelFormat,ppfd);
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if (!dc) return 0;
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if (!dc->funcs->pSetPixelFormat) FIXME(" :stub\n");
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else bRet = dc->funcs->pSetPixelFormat(dc->physDev,iPixelFormat,ppfd);
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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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* GetPixelFormat [GDI32.@]
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* Gets index of pixel format of DC
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*
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* PARAMETERS
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* hdc [I] Device context whose pixel format index is sought
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*
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* RETURNS
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* Success: Currently selected pixel format
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* Failure: 0
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*/
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INT WINAPI GetPixelFormat( HDC hdc )
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{
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INT ret = 0;
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DC * dc = DC_GetDCPtr( hdc );
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TRACE("(%p)\n",hdc);
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if (!dc) return 0;
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if (!dc->funcs->pGetPixelFormat) FIXME(" :stub\n");
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else ret = dc->funcs->pGetPixelFormat(dc->physDev);
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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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* DescribePixelFormat [GDI32.@]
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* Gets info about pixel format from DC
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*
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* PARAMS
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* hdc [I] Device context
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* iPixelFormat [I] Pixel format selector
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* nBytes [I] Size of buffer
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* ppfd [O] Pointer to structure to receive pixel format data
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*
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* RETURNS
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* Success: Maximum pixel format index of the device context
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* Failure: 0
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*/
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INT WINAPI DescribePixelFormat( HDC hdc, INT iPixelFormat, UINT nBytes,
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LPPIXELFORMATDESCRIPTOR ppfd )
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{
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INT ret = 0;
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DC * dc = DC_GetDCPtr( hdc );
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TRACE("(%p,%d,%d,%p): stub\n",hdc,iPixelFormat,nBytes,ppfd);
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if (!dc) return 0;
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if (!dc->funcs->pDescribePixelFormat)
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{
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FIXME(" :stub\n");
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ppfd->nSize = nBytes;
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ppfd->nVersion = 1;
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ret = 3;
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}
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else ret = dc->funcs->pDescribePixelFormat(dc->physDev,iPixelFormat,nBytes,ppfd);
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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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* SwapBuffers [GDI32.@]
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* Exchanges front and back buffers of window
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*
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* PARAMS
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* hdc [I] Device context whose buffers get swapped
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*
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* RETURNS STD
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*/
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BOOL WINAPI SwapBuffers( HDC hdc )
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{
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INT bRet = FALSE;
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DC * dc = DC_GetDCPtr( hdc );
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TRACE("(%p)\n",hdc);
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if (!dc) return TRUE;
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if (!dc->funcs->pSwapBuffers)
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{
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FIXME(" :stub\n");
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bRet = TRUE;
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}
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else bRet = dc->funcs->pSwapBuffers(dc->physDev);
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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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* PaintRgn (GDI32.@)
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*/
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BOOL WINAPI PaintRgn( HDC hdc, HRGN hrgn )
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{
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BOOL ret = FALSE;
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DC * dc = DC_GetDCUpdate( hdc );
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if (dc)
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{
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if (dc->funcs->pPaintRgn) ret = dc->funcs->pPaintRgn(dc->physDev,hrgn);
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GDI_ReleaseObj( hdc );
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}
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return ret;
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}
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/***********************************************************************
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* FillRgn (GDI32.@)
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*/
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BOOL WINAPI FillRgn( HDC hdc, HRGN hrgn, HBRUSH hbrush )
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{
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BOOL retval = FALSE;
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HBRUSH prevBrush;
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DC * dc = DC_GetDCUpdate( hdc );
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if (!dc) return FALSE;
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if(dc->funcs->pFillRgn)
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retval = dc->funcs->pFillRgn(dc->physDev, hrgn, hbrush);
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else if ((prevBrush = SelectObject( hdc, hbrush )))
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{
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retval = PaintRgn( hdc, hrgn );
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SelectObject( hdc, prevBrush );
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}
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GDI_ReleaseObj( hdc );
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return retval;
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}
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/***********************************************************************
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* FrameRgn (GDI32.@)
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*/
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BOOL WINAPI FrameRgn( HDC hdc, HRGN hrgn, HBRUSH hbrush,
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INT nWidth, INT nHeight )
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{
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BOOL ret = FALSE;
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DC *dc = DC_GetDCUpdate( hdc );
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|
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if (!dc) return FALSE;
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if(dc->funcs->pFrameRgn)
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ret = dc->funcs->pFrameRgn( dc->physDev, hrgn, hbrush, nWidth, nHeight );
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else
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{
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HRGN tmp = CreateRectRgn( 0, 0, 0, 0 );
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if (tmp)
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{
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if (REGION_FrameRgn( tmp, hrgn, nWidth, nHeight ))
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{
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FillRgn( hdc, tmp, hbrush );
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ret = TRUE;
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}
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DeleteObject( tmp );
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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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/***********************************************************************
|
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* InvertRgn (GDI32.@)
|
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*/
|
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BOOL WINAPI InvertRgn( HDC hdc, HRGN hrgn )
|
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{
|
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HBRUSH prevBrush;
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INT prevROP;
|
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BOOL retval;
|
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DC *dc = DC_GetDCUpdate( hdc );
|
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if (!dc) return FALSE;
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|
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if(dc->funcs->pInvertRgn)
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retval = dc->funcs->pInvertRgn( dc->physDev, hrgn );
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else
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{
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prevBrush = SelectObject( hdc, GetStockObject(BLACK_BRUSH) );
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prevROP = SetROP2( hdc, R2_NOT );
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retval = PaintRgn( hdc, hrgn );
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SelectObject( hdc, prevBrush );
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SetROP2( hdc, prevROP );
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}
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GDI_ReleaseObj( hdc );
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return retval;
|
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}
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|
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/**********************************************************************
|
|
* Polyline (GDI32.@)
|
|
*/
|
|
BOOL WINAPI Polyline( HDC hdc, const POINT* pt, INT count )
|
|
{
|
|
BOOL ret = FALSE;
|
|
DC * dc = DC_GetDCUpdate( hdc );
|
|
if (dc)
|
|
{
|
|
if (PATH_IsPathOpen(dc->path)) ret = PATH_Polyline(dc, pt, count);
|
|
else if (dc->funcs->pPolyline) ret = dc->funcs->pPolyline(dc->physDev,pt,count);
|
|
GDI_ReleaseObj( hdc );
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/**********************************************************************
|
|
* PolylineTo (GDI32.@)
|
|
*/
|
|
BOOL WINAPI PolylineTo( HDC hdc, const POINT* pt, DWORD cCount )
|
|
{
|
|
DC * dc = DC_GetDCUpdate( hdc );
|
|
BOOL ret = FALSE;
|
|
|
|
if(!dc) return FALSE;
|
|
|
|
if(PATH_IsPathOpen(dc->path))
|
|
ret = PATH_PolylineTo(dc, pt, cCount);
|
|
|
|
else if(dc->funcs->pPolylineTo)
|
|
ret = dc->funcs->pPolylineTo(dc->physDev, pt, cCount);
|
|
|
|
else { /* do it using Polyline */
|
|
POINT *pts = HeapAlloc( GetProcessHeap(), 0,
|
|
sizeof(POINT) * (cCount + 1) );
|
|
if (pts)
|
|
{
|
|
pts[0].x = dc->CursPosX;
|
|
pts[0].y = dc->CursPosY;
|
|
memcpy( pts + 1, pt, sizeof(POINT) * cCount );
|
|
ret = Polyline( hdc, pts, cCount + 1 );
|
|
HeapFree( GetProcessHeap(), 0, pts );
|
|
}
|
|
}
|
|
if(ret) {
|
|
dc->CursPosX = pt[cCount-1].x;
|
|
dc->CursPosY = pt[cCount-1].y;
|
|
}
|
|
GDI_ReleaseObj( hdc );
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* Polygon (GDI32.@)
|
|
*/
|
|
BOOL WINAPI Polygon( HDC hdc, const POINT* pt, INT count )
|
|
{
|
|
BOOL ret = FALSE;
|
|
DC * dc = DC_GetDCUpdate( hdc );
|
|
if (dc)
|
|
{
|
|
if (PATH_IsPathOpen(dc->path)) ret = PATH_Polygon(dc, pt, count);
|
|
else if (dc->funcs->pPolygon) ret = dc->funcs->pPolygon(dc->physDev,pt,count);
|
|
GDI_ReleaseObj( hdc );
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* PolyPolygon (GDI32.@)
|
|
*/
|
|
BOOL WINAPI PolyPolygon( HDC hdc, const POINT* pt, const INT* counts,
|
|
UINT polygons )
|
|
{
|
|
BOOL ret = FALSE;
|
|
DC * dc = DC_GetDCUpdate( hdc );
|
|
if (dc)
|
|
{
|
|
if (PATH_IsPathOpen(dc->path)) ret = PATH_PolyPolygon(dc, pt, counts, polygons);
|
|
else if (dc->funcs->pPolyPolygon) ret = dc->funcs->pPolyPolygon(dc->physDev,pt,counts,polygons);
|
|
GDI_ReleaseObj( hdc );
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/**********************************************************************
|
|
* PolyPolyline (GDI32.@)
|
|
*/
|
|
BOOL WINAPI PolyPolyline( HDC hdc, const POINT* pt, const DWORD* counts,
|
|
DWORD polylines )
|
|
{
|
|
BOOL ret = FALSE;
|
|
DC * dc = DC_GetDCUpdate( hdc );
|
|
if (dc)
|
|
{
|
|
if (PATH_IsPathOpen(dc->path)) ret = PATH_PolyPolyline(dc, pt, counts, polylines);
|
|
else if (dc->funcs->pPolyPolyline) ret = dc->funcs->pPolyPolyline(dc->physDev,pt,counts,polylines);
|
|
GDI_ReleaseObj( hdc );
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/**********************************************************************
|
|
* ExtFloodFill (GDI32.@)
|
|
*/
|
|
BOOL WINAPI ExtFloodFill( HDC hdc, INT x, INT y, COLORREF color,
|
|
UINT fillType )
|
|
{
|
|
BOOL ret = FALSE;
|
|
DC * dc = DC_GetDCUpdate( hdc );
|
|
if (dc)
|
|
{
|
|
if (dc->funcs->pExtFloodFill) ret = dc->funcs->pExtFloodFill(dc->physDev,x,y,color,fillType);
|
|
GDI_ReleaseObj( hdc );
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* FloodFill (GDI32.@)
|
|
*/
|
|
BOOL WINAPI FloodFill( HDC hdc, INT x, INT y, COLORREF color )
|
|
{
|
|
return ExtFloodFill( hdc, x, y, color, FLOODFILLBORDER );
|
|
}
|
|
|
|
|
|
/******************************************************************************
|
|
* PolyBezier [GDI32.@]
|
|
* Draws one or more Bezier curves
|
|
*
|
|
* PARAMS
|
|
* hDc [I] Handle to device context
|
|
* lppt [I] Pointer to endpoints and control points
|
|
* cPoints [I] Count of endpoints and control points
|
|
*
|
|
* RETURNS STD
|
|
*/
|
|
BOOL WINAPI PolyBezier( HDC hdc, const POINT* lppt, DWORD cPoints )
|
|
{
|
|
BOOL ret = FALSE;
|
|
DC * dc;
|
|
|
|
/* cPoints must be 3 * n + 1 (where n>=1) */
|
|
if (cPoints == 1 || (cPoints % 3) != 1) return FALSE;
|
|
|
|
dc = DC_GetDCUpdate( hdc );
|
|
if(!dc) return FALSE;
|
|
|
|
if(PATH_IsPathOpen(dc->path))
|
|
ret = PATH_PolyBezier(dc, lppt, cPoints);
|
|
else if (dc->funcs->pPolyBezier)
|
|
ret = dc->funcs->pPolyBezier(dc->physDev, lppt, cPoints);
|
|
else /* We'll convert it into line segments and draw them using Polyline */
|
|
{
|
|
POINT *Pts;
|
|
INT nOut;
|
|
|
|
if ((Pts = GDI_Bezier( lppt, cPoints, &nOut )))
|
|
{
|
|
TRACE("Pts = %p, no = %d\n", Pts, nOut);
|
|
ret = Polyline( dc->hSelf, Pts, nOut );
|
|
HeapFree( GetProcessHeap(), 0, Pts );
|
|
}
|
|
}
|
|
|
|
GDI_ReleaseObj( hdc );
|
|
return ret;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* PolyBezierTo [GDI32.@]
|
|
* Draws one or more Bezier curves
|
|
*
|
|
* PARAMS
|
|
* hDc [I] Handle to device context
|
|
* lppt [I] Pointer to endpoints and control points
|
|
* cPoints [I] Count of endpoints and control points
|
|
*
|
|
* RETURNS STD
|
|
*/
|
|
BOOL WINAPI PolyBezierTo( HDC hdc, const POINT* lppt, DWORD cPoints )
|
|
{
|
|
DC * dc = DC_GetDCUpdate( hdc );
|
|
BOOL ret;
|
|
|
|
if(!dc) return FALSE;
|
|
|
|
if(PATH_IsPathOpen(dc->path))
|
|
ret = PATH_PolyBezierTo(dc, lppt, cPoints);
|
|
else if(dc->funcs->pPolyBezierTo)
|
|
ret = dc->funcs->pPolyBezierTo(dc->physDev, lppt, cPoints);
|
|
else { /* We'll do it using PolyBezier */
|
|
POINT *pt;
|
|
pt = HeapAlloc( GetProcessHeap(), 0, sizeof(POINT) * (cPoints + 1) );
|
|
if(!pt) return FALSE;
|
|
pt[0].x = dc->CursPosX;
|
|
pt[0].y = dc->CursPosY;
|
|
memcpy(pt + 1, lppt, sizeof(POINT) * cPoints);
|
|
ret = PolyBezier(dc->hSelf, pt, cPoints+1);
|
|
HeapFree( GetProcessHeap(), 0, pt );
|
|
}
|
|
if(ret) {
|
|
dc->CursPosX = lppt[cPoints-1].x;
|
|
dc->CursPosY = lppt[cPoints-1].y;
|
|
}
|
|
GDI_ReleaseObj( hdc );
|
|
return ret;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* AngleArc (GDI32.@)
|
|
*/
|
|
BOOL WINAPI AngleArc(HDC hdc, INT x, INT y, DWORD dwRadius, FLOAT eStartAngle, FLOAT eSweepAngle)
|
|
{
|
|
INT x1,y1,x2,y2, arcdir;
|
|
BOOL result;
|
|
DC *dc;
|
|
|
|
if( (signed int)dwRadius < 0 )
|
|
return FALSE;
|
|
|
|
dc = DC_GetDCUpdate( hdc );
|
|
if(!dc) return FALSE;
|
|
|
|
if(dc->funcs->pAngleArc)
|
|
{
|
|
result = dc->funcs->pAngleArc( dc->physDev, x, y, dwRadius, eStartAngle, eSweepAngle );
|
|
|
|
GDI_ReleaseObj( hdc );
|
|
return result;
|
|
}
|
|
GDI_ReleaseObj( hdc );
|
|
|
|
/* AngleArc always works counterclockwise */
|
|
arcdir = GetArcDirection( hdc );
|
|
SetArcDirection( hdc, AD_COUNTERCLOCKWISE );
|
|
|
|
x1 = x + cos(eStartAngle*M_PI/180) * dwRadius;
|
|
y1 = y - sin(eStartAngle*M_PI/180) * dwRadius;
|
|
x2 = x + cos((eStartAngle+eSweepAngle)*M_PI/180) * dwRadius;
|
|
y2 = x - sin((eStartAngle+eSweepAngle)*M_PI/180) * dwRadius;
|
|
|
|
LineTo( hdc, x1, y1 );
|
|
if( eSweepAngle >= 0 )
|
|
result = Arc( hdc, x-dwRadius, y-dwRadius, x+dwRadius, y+dwRadius,
|
|
x1, y1, x2, y2 );
|
|
else
|
|
result = Arc( hdc, x-dwRadius, y-dwRadius, x+dwRadius, y+dwRadius,
|
|
x2, y2, x1, y1 );
|
|
|
|
if( result ) MoveToEx( hdc, x2, y2, NULL );
|
|
SetArcDirection( hdc, arcdir );
|
|
return result;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* PolyDraw (GDI32.@)
|
|
*/
|
|
BOOL WINAPI PolyDraw(HDC hdc, const POINT *lppt, const BYTE *lpbTypes,
|
|
DWORD cCount)
|
|
{
|
|
DC *dc;
|
|
BOOL result;
|
|
POINT lastmove;
|
|
int i;
|
|
|
|
dc = DC_GetDCUpdate( hdc );
|
|
if(!dc) return FALSE;
|
|
|
|
if(dc->funcs->pPolyDraw)
|
|
{
|
|
result = dc->funcs->pPolyDraw( dc->physDev, lppt, lpbTypes, cCount );
|
|
GDI_ReleaseObj( hdc );
|
|
return result;
|
|
}
|
|
GDI_ReleaseObj( hdc );
|
|
|
|
/* check for each bezierto if there are two more points */
|
|
for( i = 0; i < cCount; i++ )
|
|
if( lpbTypes[i] != PT_MOVETO &&
|
|
lpbTypes[i] & PT_BEZIERTO )
|
|
{
|
|
if( cCount < i+3 )
|
|
return FALSE;
|
|
else
|
|
i += 2;
|
|
}
|
|
|
|
/* if no moveto occurs, we will close the figure here */
|
|
lastmove.x = dc->CursPosX;
|
|
lastmove.y = dc->CursPosY;
|
|
|
|
/* now let's draw */
|
|
for( i = 0; i < cCount; i++ )
|
|
{
|
|
if( lpbTypes[i] == PT_MOVETO )
|
|
{
|
|
MoveToEx( hdc, lppt[i].x, lppt[i].y, NULL );
|
|
lastmove.x = dc->CursPosX;
|
|
lastmove.y = dc->CursPosY;
|
|
}
|
|
else if( lpbTypes[i] & PT_LINETO )
|
|
LineTo( hdc, lppt[i].x, lppt[i].y );
|
|
else if( lpbTypes[i] & PT_BEZIERTO )
|
|
{
|
|
PolyBezierTo( hdc, &lppt[i], 3 );
|
|
i += 2;
|
|
}
|
|
else
|
|
return FALSE;
|
|
|
|
if( lpbTypes[i] & PT_CLOSEFIGURE )
|
|
{
|
|
if( PATH_IsPathOpen( dc->path ) )
|
|
CloseFigure( hdc );
|
|
else
|
|
LineTo( hdc, lastmove.x, lastmove.y );
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/******************************************************************
|
|
*
|
|
* *Very* simple bezier drawing code,
|
|
*
|
|
* It uses a recursive algorithm to divide the curve in a series
|
|
* of straight line segements. Not ideal but for me sufficient.
|
|
* If you are in need for something better look for some incremental
|
|
* algorithm.
|
|
*
|
|
* 7 July 1998 Rein Klazes
|
|
*/
|
|
|
|
/*
|
|
* some macro definitions for bezier drawing
|
|
*
|
|
* to avoid truncation errors the coordinates are
|
|
* shifted upwards. When used in drawing they are
|
|
* shifted down again, including correct rounding
|
|
* and avoiding floating point arithmetic
|
|
* 4 bits should allow 27 bits coordinates which I saw
|
|
* somewhere in the win32 doc's
|
|
*
|
|
*/
|
|
|
|
#define BEZIERSHIFTBITS 4
|
|
#define BEZIERSHIFTUP(x) ((x)<<BEZIERSHIFTBITS)
|
|
#define BEZIERPIXEL BEZIERSHIFTUP(1)
|
|
#define BEZIERSHIFTDOWN(x) (((x)+(1<<(BEZIERSHIFTBITS-1)))>>BEZIERSHIFTBITS)
|
|
/* maximum depth of recursion */
|
|
#define BEZIERMAXDEPTH 8
|
|
|
|
/* size of array to store points on */
|
|
/* enough for one curve */
|
|
#define BEZIER_INITBUFSIZE (150)
|
|
|
|
/* calculate Bezier average, in this case the middle
|
|
* correctly rounded...
|
|
* */
|
|
|
|
#define BEZIERMIDDLE(Mid, P1, P2) \
|
|
(Mid).x=((P1).x+(P2).x + 1)/2;\
|
|
(Mid).y=((P1).y+(P2).y + 1)/2;
|
|
|
|
/**********************************************************
|
|
* BezierCheck helper function to check
|
|
* that recursion can be terminated
|
|
* Points[0] and Points[3] are begin and endpoint
|
|
* Points[1] and Points[2] are control points
|
|
* level is the recursion depth
|
|
* returns true if the recusion can be terminated
|
|
*/
|
|
static BOOL BezierCheck( int level, POINT *Points)
|
|
{
|
|
INT dx, dy;
|
|
dx=Points[3].x-Points[0].x;
|
|
dy=Points[3].y-Points[0].y;
|
|
if(abs(dy)<=abs(dx)){/* shallow line */
|
|
/* check that control points are between begin and end */
|
|
if(Points[1].x < Points[0].x){
|
|
if(Points[1].x < Points[3].x)
|
|
return FALSE;
|
|
}else
|
|
if(Points[1].x > Points[3].x)
|
|
return FALSE;
|
|
if(Points[2].x < Points[0].x){
|
|
if(Points[2].x < Points[3].x)
|
|
return FALSE;
|
|
}else
|
|
if(Points[2].x > Points[3].x)
|
|
return FALSE;
|
|
dx=BEZIERSHIFTDOWN(dx);
|
|
if(!dx) return TRUE;
|
|
if(abs(Points[1].y-Points[0].y-(dy/dx)*
|
|
BEZIERSHIFTDOWN(Points[1].x-Points[0].x)) > BEZIERPIXEL ||
|
|
abs(Points[2].y-Points[0].y-(dy/dx)*
|
|
BEZIERSHIFTDOWN(Points[2].x-Points[0].x)) > BEZIERPIXEL )
|
|
return FALSE;
|
|
else
|
|
return TRUE;
|
|
}else{ /* steep line */
|
|
/* check that control points are between begin and end */
|
|
if(Points[1].y < Points[0].y){
|
|
if(Points[1].y < Points[3].y)
|
|
return FALSE;
|
|
}else
|
|
if(Points[1].y > Points[3].y)
|
|
return FALSE;
|
|
if(Points[2].y < Points[0].y){
|
|
if(Points[2].y < Points[3].y)
|
|
return FALSE;
|
|
}else
|
|
if(Points[2].y > Points[3].y)
|
|
return FALSE;
|
|
dy=BEZIERSHIFTDOWN(dy);
|
|
if(!dy) return TRUE;
|
|
if(abs(Points[1].x-Points[0].x-(dx/dy)*
|
|
BEZIERSHIFTDOWN(Points[1].y-Points[0].y)) > BEZIERPIXEL ||
|
|
abs(Points[2].x-Points[0].x-(dx/dy)*
|
|
BEZIERSHIFTDOWN(Points[2].y-Points[0].y)) > BEZIERPIXEL )
|
|
return FALSE;
|
|
else
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
/* Helper for GDI_Bezier.
|
|
* Just handles one Bezier, so Points should point to four POINTs
|
|
*/
|
|
static void GDI_InternalBezier( POINT *Points, POINT **PtsOut, INT *dwOut,
|
|
INT *nPtsOut, INT level )
|
|
{
|
|
if(*nPtsOut == *dwOut) {
|
|
*dwOut *= 2;
|
|
*PtsOut = HeapReAlloc( GetProcessHeap(), 0, *PtsOut,
|
|
*dwOut * sizeof(POINT) );
|
|
}
|
|
|
|
if(!level || BezierCheck(level, Points)) {
|
|
if(*nPtsOut == 0) {
|
|
(*PtsOut)[0].x = BEZIERSHIFTDOWN(Points[0].x);
|
|
(*PtsOut)[0].y = BEZIERSHIFTDOWN(Points[0].y);
|
|
*nPtsOut = 1;
|
|
}
|
|
(*PtsOut)[*nPtsOut].x = BEZIERSHIFTDOWN(Points[3].x);
|
|
(*PtsOut)[*nPtsOut].y = BEZIERSHIFTDOWN(Points[3].y);
|
|
(*nPtsOut) ++;
|
|
} else {
|
|
POINT Points2[4]; /* for the second recursive call */
|
|
Points2[3]=Points[3];
|
|
BEZIERMIDDLE(Points2[2], Points[2], Points[3]);
|
|
BEZIERMIDDLE(Points2[0], Points[1], Points[2]);
|
|
BEZIERMIDDLE(Points2[1],Points2[0],Points2[2]);
|
|
|
|
BEZIERMIDDLE(Points[1], Points[0], Points[1]);
|
|
BEZIERMIDDLE(Points[2], Points[1], Points2[0]);
|
|
BEZIERMIDDLE(Points[3], Points[2], Points2[1]);
|
|
|
|
Points2[0]=Points[3];
|
|
|
|
/* do the two halves */
|
|
GDI_InternalBezier(Points, PtsOut, dwOut, nPtsOut, level-1);
|
|
GDI_InternalBezier(Points2, PtsOut, dwOut, nPtsOut, level-1);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/***********************************************************************
|
|
* GDI_Bezier [INTERNAL]
|
|
* Calculate line segments that approximate -what microsoft calls- a bezier
|
|
* curve.
|
|
* The routine recursively divides the curve in two parts until a straight
|
|
* line can be drawn
|
|
*
|
|
* PARAMS
|
|
*
|
|
* Points [I] Ptr to count POINTs which are the end and control points
|
|
* of the set of Bezier curves to flatten.
|
|
* count [I] Number of Points. Must be 3n+1.
|
|
* nPtsOut [O] Will contain no of points that have been produced (i.e. no. of
|
|
* lines+1).
|
|
*
|
|
* RETURNS
|
|
*
|
|
* Ptr to an array of POINTs that contain the lines that approximinate the
|
|
* Beziers. The array is allocated on the process heap and it is the caller's
|
|
* responsibility to HeapFree it. [this is not a particularly nice interface
|
|
* but since we can't know in advance how many points will generate, the
|
|
* alternative would be to call the function twice, once to determine the size
|
|
* and a second time to do the work - I decided this was too much of a pain].
|
|
*/
|
|
POINT *GDI_Bezier( const POINT *Points, INT count, INT *nPtsOut )
|
|
{
|
|
POINT *out;
|
|
INT Bezier, dwOut = BEZIER_INITBUFSIZE, i;
|
|
|
|
if((count - 1) % 3 != 0) {
|
|
ERR("Invalid no. of points\n");
|
|
return NULL;
|
|
}
|
|
*nPtsOut = 0;
|
|
out = HeapAlloc( GetProcessHeap(), 0, dwOut * sizeof(POINT));
|
|
for(Bezier = 0; Bezier < (count-1)/3; Bezier++) {
|
|
POINT ptBuf[4];
|
|
memcpy(ptBuf, Points + Bezier * 3, sizeof(POINT) * 4);
|
|
for(i = 0; i < 4; i++) {
|
|
ptBuf[i].x = BEZIERSHIFTUP(ptBuf[i].x);
|
|
ptBuf[i].y = BEZIERSHIFTUP(ptBuf[i].y);
|
|
}
|
|
GDI_InternalBezier( ptBuf, &out, &dwOut, nPtsOut, BEZIERMAXDEPTH );
|
|
}
|
|
TRACE("Produced %d points\n", *nPtsOut);
|
|
return out;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* GradientFill (GDI32.@)
|
|
*/
|
|
BOOL WINAPI GdiGradientFill( HDC hdc, TRIVERTEX *vert_array, ULONG nvert,
|
|
void * grad_array, ULONG ngrad, ULONG mode )
|
|
{
|
|
int i;
|
|
|
|
TRACE("vert_array:0x%08lx nvert:%ld grad_array:0x%08lx ngrad:%ld\n",
|
|
(long)vert_array, nvert, (long)grad_array, ngrad);
|
|
|
|
switch(mode)
|
|
{
|
|
case GRADIENT_FILL_RECT_H:
|
|
for(i = 0; i < ngrad; i++)
|
|
{
|
|
GRADIENT_RECT *rect = ((GRADIENT_RECT *)grad_array) + i;
|
|
TRIVERTEX *v1 = vert_array + rect->UpperLeft;
|
|
TRIVERTEX *v2 = vert_array + rect->LowerRight;
|
|
int y1 = v1->y < v2->y ? v1->y : v2->y;
|
|
int y2 = v2->y > v1->y ? v2->y : v1->y;
|
|
int x, dx;
|
|
if (v1->x > v2->x)
|
|
{
|
|
TRIVERTEX *t = v2;
|
|
v2 = v1;
|
|
v1 = t;
|
|
}
|
|
dx = v2->x - v1->x;
|
|
for (x = 0; x < dx; x++)
|
|
{
|
|
POINT pts[2];
|
|
HPEN hPen, hOldPen;
|
|
|
|
hPen = CreatePen( PS_SOLID, 1, RGB(
|
|
(v1->Red * (dx - x) + v2->Red * x) / dx >> 8,
|
|
(v1->Green * (dx - x) + v2->Green * x) / dx >> 8,
|
|
(v1->Blue * (dx - x) + v2->Blue * x) / dx >> 8));
|
|
hOldPen = SelectObject( hdc, hPen );
|
|
pts[0].x = x;
|
|
pts[0].y = y1;
|
|
pts[1].x = x;
|
|
pts[1].y = y2;
|
|
Polyline( hdc, &pts[0], 2 );
|
|
DeleteObject( SelectObject(hdc, hOldPen ) );
|
|
}
|
|
}
|
|
break;
|
|
case GRADIENT_FILL_RECT_V:
|
|
for(i = 0; i < ngrad; i++)
|
|
{
|
|
GRADIENT_RECT *rect = ((GRADIENT_RECT *)grad_array) + i;
|
|
TRIVERTEX *v1 = vert_array + rect->UpperLeft;
|
|
TRIVERTEX *v2 = vert_array + rect->LowerRight;
|
|
int x1 = v1->x < v2->x ? v1->x : v2->x;
|
|
int x2 = v2->x > v1->x ? v2->x : v1->x;
|
|
int y, dy;
|
|
if (v1->y > v2->y)
|
|
{
|
|
TRIVERTEX *t = v2;
|
|
v2 = v1;
|
|
v1 = t;
|
|
}
|
|
dy = v2->y - v1->y;
|
|
for (y = 0; y < dy; y++)
|
|
{
|
|
POINT pts[2];
|
|
HPEN hPen, hOldPen;
|
|
|
|
hPen = CreatePen( PS_SOLID, 1, RGB(
|
|
(v1->Red * (dy - y) + v2->Red * y) / dy >> 8,
|
|
(v1->Green * (dy - y) + v2->Green * y) / dy >> 8,
|
|
(v1->Blue * (dy - y) + v2->Blue * y) / dy >> 8));
|
|
hOldPen = SelectObject( hdc, hPen );
|
|
pts[0].x = x1;
|
|
pts[0].y = y;
|
|
pts[1].x = x2;
|
|
pts[1].y = y;
|
|
Polyline( hdc, &pts[0], 2 );
|
|
DeleteObject( SelectObject(hdc, hOldPen ) );
|
|
}
|
|
}
|
|
break;
|
|
case GRADIENT_FILL_TRIANGLE:
|
|
for (i = 0; i < ngrad; i++)
|
|
{
|
|
GRADIENT_TRIANGLE *tri = ((GRADIENT_TRIANGLE *)grad_array) + i;
|
|
TRIVERTEX *v1 = vert_array + tri->Vertex1;
|
|
TRIVERTEX *v2 = vert_array + tri->Vertex2;
|
|
TRIVERTEX *v3 = vert_array + tri->Vertex3;
|
|
int y, dy;
|
|
|
|
if (v1->y > v2->y)
|
|
{ TRIVERTEX *t = v1; v1 = v2; v2 = t; }
|
|
if (v2->y > v3->y)
|
|
{
|
|
TRIVERTEX *t = v2; v2 = v3; v3 = t;
|
|
if (v1->y > v2->y)
|
|
{ t = v1; v1 = v2; v2 = t; }
|
|
}
|
|
/* v1->y <= v2->y <= v3->y */
|
|
|
|
dy = v3->y - v1->y;
|
|
for (y = 0; y < dy; y++)
|
|
{
|
|
/* v1->y <= y < v3->y */
|
|
TRIVERTEX *v = y < (v2->y - v1->y) ? v1 : v3;
|
|
/* (v->y <= y < v2->y) || (v2->y <= y < v->y) */
|
|
int dy2 = v2->y - v->y;
|
|
int y2 = y + v1->y - v->y;
|
|
|
|
int x1 = (v3->x * y + v1->x * (dy - y )) / dy;
|
|
int x2 = (v2->x * y2 + v-> x * (dy2 - y2)) / dy2;
|
|
int r1 = (v3->Red * y + v1->Red * (dy - y )) / dy;
|
|
int r2 = (v2->Red * y2 + v-> Red * (dy2 - y2)) / dy2;
|
|
int g1 = (v3->Green * y + v1->Green * (dy - y )) / dy;
|
|
int g2 = (v2->Green * y2 + v-> Green * (dy2 - y2)) / dy2;
|
|
int b1 = (v3->Blue * y + v1->Blue * (dy - y )) / dy;
|
|
int b2 = (v2->Blue * y2 + v-> Blue * (dy2 - y2)) / dy2;
|
|
|
|
int x;
|
|
if (x1 < x2)
|
|
{
|
|
int dx = x2 - x1;
|
|
for (x = 0; x < dx; x++)
|
|
SetPixel (hdc, x + x1, y + v1->y, RGB(
|
|
(r1 * (dx - x) + r2 * x) / dx >> 8,
|
|
(g1 * (dx - x) + g2 * x) / dx >> 8,
|
|
(b1 * (dx - x) + b2 * x) / dx >> 8));
|
|
}
|
|
else
|
|
{
|
|
int dx = x1 - x2;
|
|
for (x = 0; x < dx; x++)
|
|
SetPixel (hdc, x + x2, y + v1->y, RGB(
|
|
(r2 * (dx - x) + r1 * x) / dx >> 8,
|
|
(g2 * (dx - x) + g1 * x) / dx >> 8,
|
|
(b2 * (dx - x) + b1 * x) / dx >> 8));
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|