hcvp0.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          */
/*                                                                       */
/*      HCVP0.c                                          1.9             */
/*                                                                       */
/* COMPONENT                                                             */
/*                                                                       */
/*      All                                                              */
/*                                                                       */
/* DESCRIPTION                                                           */
/*                                                                       */
/*      This file contains the Gbl2LclPt & Gbl2LclRect functions.        */
/*                                                                       */
/* 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"
#include "metmacs3.h"


/* Function Gbl2LclPt converts the specified global bitmap point, argPT,
into what would be local coordinates for the current grafPort.

Note: the current port may be in virtual mode, this must be ignored. */
void Gbl2LclPt(point *argPT)
{

	argPT->X += (grafPort.portRect.Xmin - grafPort.portOrgn.X);

	if (grafPort.portFlags & pfUpper)
	{	/* upper left:   Yl = Yg + portYmin + -portoriginY */
		argPT->Y += (grafPort.portRect.Ymin - grafPort.portOrgn.Y);
	}
	else
	{	/* lower left:   Yl = -Yg + portYmax + portoriginY */
		argPT->Y = -argPT->Y + grafPort.portRect.Ymin + grafPort.portOrgn.Y;
	}

	return;
}


/* Function Gbl2LclRect converts the specified global bitmap rectangle,
argR, into what would be local coordinates for the current grafPort. */
void Gbl2LclRect(rect *argR)
{
	point tempPt;

	/* convert first point */
	tempPt.X = argR->Xmin;
	tempPt.Y = argR->Ymin;
	Gbl2LclPt(&tempPt);
	argR->Xmin = tempPt.X;
	argR->Ymin = tempPt.Y;
			       
	/* convert second point */
	tempPt.X = argR->Xmax;
	tempPt.Y = argR->Ymax;
	Gbl2LclPt(&tempPt);

	/* lower origin will cause Ymax < Ymin */
	if (tempPt.Y > argR->Ymin)
	{
		argR->Ymax = tempPt.Y;
	}
	else
	{
		argR->Ymax = argR->Ymin;
		argR->Ymin = tempPt.Y;
	}

	return;
}