npen2.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          */
/*                                                                       */
/*      NPEN2.c                                          1.9             */
/*                                                                       */
/* COMPONENT                                                             */
/*                                                                       */
/*      All                                                              */
/*                                                                       */
/* DESCRIPTION                                                           */
/*                                                                       */
/*      This file contains the PenPattern 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 PenPattern sets the "pnPat" field of the current viewport to one 32 
predefined patterns.
This routine also smart links patterned lines.
 */

void PenPattern(int argPat)
{
	short grafErrValue;	/* error value */
	void mwLIT(void);

	if (argPat > 31)
	{	/* error! */
		grafErrValue = c_PenPatte +  c_BadPatt;
		nuGrafErr(grafErrValue);	/* report error */
		argPat = 1;	/* make solid pen */
	}

	if (argPat != grafPort.pnPat)	/* check if pattern already set */
	{	/* change it if not */
		if (argPat > 1)
		{	/* set patterned pen flag */
			grafPort.pnFlags |= pnPattFlg;
		}
		else
		{	/* clear patterned pen flag */
			grafPort.pnFlags &= ~pnPattFlg;
		}

		grafPort.pnPat = argPat;	/* set shadow port */
		grafBlit.blitPat = argPat;	/* set default blitRcd */
		linePattIDV = (long) mwLIT;	/* smart link patterned lines */
		SETLINESTYLE(grafPort.pnFlags);	/* refresh current line style vector */
		thePort->pnPat = argPat;	/* refresh the ports pattern and penflags */
		thePort->pnFlags = grafPort.pnFlags;
	}

	return;
}