view5.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          */
/*                                                                       */
/*      VIEW5.c                                          1.9             */
/*                                                                       */
/* COMPONENT                                                             */
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/*      All                                                              */
/*                                                                       */
/* DESCRIPTION                                                           */
/*                                                                       */
/*      This file contains the MovePortTo function.                      */
/*                                                                       */
/* AUTHOR                                                                */
/*                                                                       */
/*      Robert G. Burrill, Accelerated Technology, Inc.                  */
/*                                                                       */
/* DATA STRUCTURES                                                       */
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/*      None                                                             */
/*                                                                       */
/* FUNCTIONS                                                             */
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/*      None                                                             */
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/* DEPENDENCIES                                                          */
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/*      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 MovePortTo moves the position of the current grafPort to a new 
location on the bitmap.  Note that MovePortTo does not immediately affect the 
screen image.  It only affects the location of subsequent write operations to 
the port.  If you are actually moving the location of an existing visible 
port, you will need to use both procedures CopyBlit() to move the visible port 
image, and MovePortTo to set the new port location for subsequent write 
operations.

gblLEFT and gblTOP define the top-left corner of the grafPort on the
bitmap in global (pixel) coordinates (are independent of the
port's local coordinate system and local axis orientations).  gblLEFT
and gblTOP define global X and Y coordinates from the bitmap's
top-left corner position.

Any existing regions used in this port will have to be offset manually. */
void MovePortTo(int gblLEFT, int gblTOP)
{
	void mwGblCoord(void);
	void mwGblClip(metaPort *inpClpPort, rect *outClipR);
	void mwGblPen(void);
	rect tmpRect;

	thePort->portOrgn.X = gblLEFT;	/* set user port */
	grafPort.portOrgn.X = gblLEFT;	/* set shadow port */
	thePort->portOrgn.Y = gblTOP;
	grafPort.portOrgn.Y = gblTOP;

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

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

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

	return;
}