reg17.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          */
/*                                                                       */
/*      REG17.c                                          1.9             */
/*                                                                       */
/* COMPONENT                                                             */
/*                                                                       */
/*      All                                                              */
/*                                                                       */
/* DESCRIPTION                                                           */
/*                                                                       */
/*      This file contains the EqualRegion function.                     */
/*                                                                       */
/* AUTHOR                                                                */
/*                                                                       */
/*      Giac Dinh, 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"
#include "metmacs3.h"


/* Function EqualRegion checks to see if two regios structures describe 
   identical regions.  */
int EqualRegion( region *rg1, region *rg2 )
{
	rect *rg1Rect;
	rect *rg2Rect;
	int rCnt;

/* Check used size  */
	if(rg1->rgnSize != rg2->rgnSize)
	return(0);

	if((rg1->rgnRect.Xmin != rg2->rgnRect.Xmin) ||
	   (rg1->rgnRect.Ymin != rg2->rgnRect.Ymin) ||
	   (rg1->rgnRect.Xmax != rg2->rgnRect.Xmax) ||
	   (rg1->rgnRect.Ymax != rg2->rgnRect.Ymax) )
	return(0);

/* Check the header pointer  */
	
	if( (((long)rg1->rgnList - (long)rg1) != ((long)rg2->rgnList - (long)rg2)) ||
		(((long)rg1->rgnListEnd - (long)rg1) != ((long)rg2->rgnListEnd - (long)rg2)) )
	return(0);

/* Compare the data in the list  */
	rg1Rect = rg1->rgnList;
	rg2Rect = rg2->rgnList;
	for (rCnt = 0; rCnt <= ((int) (rg1->rgnListEnd - rg1->rgnList)); rCnt++)
	{
		if ((rg1Rect->Xmin != rg2Rect->Xmin) ||
			(rg1Rect->Ymin != rg2Rect->Ymin) ||
			(rg1Rect->Xmax != rg2Rect->Xmax) ||
			(rg1Rect->Ymax != rg2Rect->Ymax)) return(0);
		rg1Rect++;
		rg2Rect++;
	}

	return(1);
}