reg16.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          */
/*                                                                       */
/*      REG16.c                                          1.9             */
/*                                                                       */
/* COMPONENT                                                             */
/*                                                                       */
/*      All                                                              */
/*                                                                       */
/* DESCRIPTION                                                           */
/*                                                                       */
/*      This file contains the DupRegion function.                       */
/*                                                                       */
/* AUTHOR                                                                */
/*                                                                       */
/*      Giac Dinh, Accelerated Technology, Inc.                          */
/*                                                                       */
/* DATA STRUCTURES                                                       */
/*                                                                       */
/*      None                                                             */
/*                                                                       */
/* FUNCTIONS                                                             */
/*                                                                       */
/*      None                                                             */
/*                                                                       */
/* DEPENDENCIES                                                          */
/*                                                                       */
/*      None                                                             */
/*                                                                       */
/* HISTORY                                                               */
/*                                                                       */
/*         NAME            DATE                    REMARKS               */
/*                                                                       */
/*         BobB          8/20/98     Corrected data copy to new region   */
/*                                                                       */
/*************************************************************************/

#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 DupRegion duplicates an existing region structure, allocating new memory
for the duplicate region. This memory must be freed by the user.  */
region *DupRegion( region *argRegion )
{
	void *GrafAlloc(int memSize);
	region *regPtr;
	short grafErrValue;
/* BobB 8/20/98 - added the following line for data copy */
	byte *regDataIn, *regDataOut;
	int i;

/* Get used size of source region and allocate it  */
	regPtr = (region *) GrafAlloc(argRegion->rgnSize);

/* Check for null location  */
	if(regPtr == 0)
	{
		grafErrValue = (short) (c_DupRegio  + c_OutofMem);
		nuGrafErr(grafErrValue);
		return(regPtr);
	}
	
/* Copy over region data  */
/* BobB 8/20/98 - corrected the following line to copy all the data
	*regPtr = *argRegion; */
	regDataIn = (byte *) argRegion;
	regDataOut = (byte *) regPtr;
	for (i = 0; i < argRegion->rgnSize; i++)
	{
		*regDataOut = *regDataIn;
		regDataOut++;
		regDataIn++;
	}

	regPtr->rgnAlloc = regPtr->rgnSize;
/* Fix up header pointer  */
	regPtr->rgnList = (rect *) ((long) regPtr + (long) argRegion->rgnList -
		(long) argRegion);
	regPtr->rgnListEnd = (rect *) ((long) regPtr + (long) argRegion->rgnListEnd -
		(long) argRegion);
	
	return(regPtr);
}