npen4.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          */
/*                                                                       */
/*      NPEN4.c                                          1.9             */
/*                                                                       */
/* COMPONENT                                                             */
/*                                                                       */
/*      All                                                              */
/*                                                                       */
/* DESCRIPTION                                                           */
/*                                                                       */
/*      This file contains the PenDash function.                         */
/*                                                                       */
/* AUTHOR                                                                */
/*                                                                       */
/*      Robert G. Burrill, Accelerated Technology, Inc.                  */
/*                                                                       */
/* DATA STRUCTURES                                                       */
/*                                                                       */
/*      None                                                             */
/*                                                                       */
/* FUNCTIONS                                                             */
/*                                                                       */
/*      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"


/* Function PenDash sets the pen style of the current metaPort 
(thePort.pnStyle) to the specified argSTYLE value.
This routine also smart links dashed lines. */

void PenDash(int argSTYLE)
{
	short grafErrValue;	/* error value */
	void mwLID(void);

	if (argSTYLE > 7)
	{	/* report an error and select dash #1 */
		grafErrValue = c_PenDash +  c_BadDash;
		nuGrafErr(grafErrValue);	/* report error */
		argSTYLE = 1;
	}

	if (argSTYLE == 0)
	{	/* clear dashing flag */
		grafPort.pnFlags &= ~pnDashFlg;
	}
	else
	{	/* set dashing flag */
		grafPort.pnFlags |= pnDashFlg;
	}

	grafPort.pnDash = argSTYLE;	/* set shadow port */
	grafPort.pnDashCnt = 0;	/* reset the dash sequence to the start */

	lineDashIDV = (long) mwLID;	/* smart link dashed lines */
	SETLINESTYLE(grafPort.pnFlags);	/* refresh current line style vector */

	thePort->pnDash = argSTYLE;	/* refresh the ports pattern and penflags */
	thePort->pnDashCnt = 0;
	thePort->pnFlags = grafPort.pnFlags;

	return;
}