view7.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          */
/*                                                                       */
/*      VIEW7.c                                          1.9             */
/*                                                                       */
/* COMPONENT                                                             */
/*                                                                       */
/*      All                                                              */
/*                                                                       */
/* DESCRIPTION                                                           */
/*                                                                       */
/*      This file contains the PortOrigin 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 PortOrigin sets the ports "origin position" in either of two 
locations: upper-left corner (poTB = TRUE), or lower-left corner (poTB = 
FALSE).

If poTB is set to True (1), the port origin is set to upper-left with +y 
values increasing from top to bottom.  

If poTB is set to False (0), the port origin is set to lower-left with +y 
values increasing from bottom to top.  (In both cases X values increase
from left to right.) */
void PortOrigin (int poTB)
{
	void mwGblCoord(void);
	void mwGblClip(metaPort *inpClpPort, rect *outClipR);
	void mwGblPen(void);
	rect tmpRect;

	if (poTB == 0)
	{	/* lower left */
		thePort-> portFlags = thePort-> portFlags & ~pfUpper;
		grafPort.portFlags = grafPort.portFlags & ~pfUpper;
	}
	else
	{	/* upper left */
		thePort-> portFlags |= pfUpper;
		grafPort.portFlags |= pfUpper;
	}

	mwGblCoord();	/* update coordinate xform data */

	mwGblClip(thePort, &tmpRect);	/* convert to global and check port clip */
	ViewClip = tmpRect;

	mwGblPen();	/* update locX,Y */

	return;
}