npen7.c

nucleus 文件系统,内核和彩色图形系统,在小系统上非常好用

/*************************************************************************/
/*                                                                       */
/*         Copyright (c) 1997 - 1999 Accelerated Technology, Inc.        */
/*                                                                       */
/* PROPRIETARY RIGHTS of Accelerated Technology are involved in the      */
/* subject matter of this material.  All manufacturing, reproduction,    */
/* use, and sales rights pertaining to this subject matter are governed  */
/* by the license agreement.  The recipient of this software implicitly  */
/* accepts the terms of the license.                                     */
/*                                                                       */
/*************************************************************************/

/*************************************************************************/
/*                                                                       */
/* FILE NAME                                            VERSION          */
/*                                                                       */
/*      NPEN7.c                                          1.9             */
/*                                                                       */
/* COMPONENT                                                             */
/*                                                                       */
/*      All                                                              */
/*                                                                       */
/* DESCRIPTION                                                           */
/*                                                                       */
/*      This file contains the PenShape & mwOL2 functions.               */
/*                                                                       */
/* AUTHOR                                                                */
/*                                                                       */
/*      Robert G. Burrill, Accelerated Technology, Inc.                  */
/*                                                                       */
/* DATA STRUCTURES                                                       */
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/*      None                                                             */
/*                                                                       */
/* FUNCTIONS                                                             */
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/*      None                                                             */
/*                                                                       */
/* DEPENDENCIES                                                          */
/*                                                                       */
/*      None                                                             */
/*                                                                       */
/* HISTORY                                                               */
/*                                                                       */
/*         NAME            DATE                    REMARKS               */
/*                                                                       */
/*                                                                       */
/*************************************************************************/

#include "meta_wnd.h"
#include "metconst.h"    /* MetaWINDOW Constant & Stucture Definitions */
#include "metports.h"    /* MetaWINDOW Port & Bitmap Definitions */
#include "grafdata.h"

void mwOL2(void);


/* Function PenShape sets the port's current pen shape (thePort.pnFlags &
pnShapeFlg) to:

	pnShapeFlg	 Metconst	Define
	------------------------------------------------
	Elliptical		0		shapeOval
	Square			1		shapeRect	

This routine also smart links oval lines. */

void PenShape(int shape)
{
	void mwOPL(short numpoints, point *points);

	if (shape != shapeRect)
	{	/* clear shape flag */
		grafPort.pnFlags &= ~pnShapeFlg;
	}
	else
	{	/* mark rectangular */
		grafPort.pnFlags |= pnShapeFlg;
	}

	thePort->pnFlags = grafPort.pnFlags;	/* update user port */

	lineOvPolyIDV = (long) mwOPL;	/* smart link oval poly lines */
	lineOvalIDV = (long) mwOL2;	/* smart link oval lines */
	SETLINESTYLE(grafPort.pnFlags);	/* refresh current line style vector */

	return;
}


/* Function mwOL2 is the generic line call handler for oval lines.  Converts 
blit record call to a polyline call. */

void mwOL2()
{
	point tmpPoints[2];
	void (*ovPLPntr)();

	globalLevel--;	/* already in global */

	/* set up the two points from the default blit list and call oval polyline */
	tmpPoints[0].X = grafBlist.Xmin;
	tmpPoints[0].Y = grafBlist.Ymin;
	tmpPoints[1].X = grafBlist.Xmax;
	tmpPoints[1].Y = grafBlist.Ymax;
	ovPLPntr = (void (*)()) lineOvPolyIDV;
	ovPLPntr(2, &tmpPoints[0]);

	globalLevel++;	/* restore globalLevel */

	return;
}