qury4.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          */
/*                                                                       */
/*      QURY4.c                                          1.9             */
/*                                                                       */
/* COMPONENT                                                             */
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/*      All                                                              */
/*                                                                       */
/* DESCRIPTION                                                           */
/*                                                                       */
/*      This file contains the QueryRes and QueryColors functions.       */
/*                                                                       */
/* AUTHOR                                                                */
/*                                                                       */
/*      Giac Dinh, Accelerated Technology, Inc.                          */
/*                                                                       */
/* DATA STRUCTURES                                                       */
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/*      None                                                             */
/*                                                                       */
/* FUNCTIONS                                                             */
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/*      None                                                             */
/*                                                                       */
/* 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"
#include "metmacs3.h"
 
 
/* Function QueryRes RETURNs the number of pixels per inch for the X and Y axis 
respectively based on the current diaplay mode.  The RETURNed RESX and RESY 
values are taken for the current metaPort's pixResX and pixResY variables.
  */

void QueryRes ( int *resX, int *resY )
{
	*resX = thePort->portMap->pixResX;
	*resY = thePort->portMap->pixResY;
}




/* Function QueryColors RETURNs the number of displayable colors available in
   the current bitmap.  */

int QueryColors(void)
{
	int colors;
	int shfCnt;
	
	shfCnt = thePort->portMap->pixPlanes ;
	if (shfCnt == 1 ) shfCnt = thePort->portMap->pixBits ;
	colors = (1 << shfCnt) - 1 ;

	return(colors);
}