view8.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          */
/*                                                                       */
/*      VIEW8.c                                          1.9             */
/*                                                                       */
/* COMPONENT                                                             */
/*                                                                       */
/*      All                                                              */
/*                                                                       */
/* DESCRIPTION                                                           */
/*                                                                       */
/*      This file contains the PortBitmap 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 PortBitmap sets the current port to reference the specified
grafMap for subsequent writing operations. */
void PortBitmap (grafMap *ptrBMAP)
{
	void mwGblClip(metaPort *inpClpPort, rect *outClipR);
	rect tmpRect;

	grafBlit.blitDmap = ptrBMAP;	/* set default blitrcd grafMap */
	lineThinIDV = (long) ptrBMAP->prLine;	/* set thin line indirect vector */
	SETLINESTYLE(grafPort.pnFlags);	/* refresh current line style vector */
	grafPort.portMap = ptrBMAP;	/* set shadow copy of the port */

	if (ptrBMAP->mapFlags & mfResetBM)
	{	/* reset bank manager */
		ptrBMAP->mapWinYmin[0] = -1;
		ptrBMAP->mapWinYmin[1] = -1;
		ptrBMAP->mapWinYmax[0] = -1;
		ptrBMAP->mapWinYmax[1] = -1;
	}

	thePort->portMap  = ptrBMAP;	/* set the current ports portMap pointer */

	/* re-compute global clip data in case bitmap is smaller than port */
	mwGblClip(thePort, &tmpRect);
	ViewClip = tmpRect;

	return;
}