poly3.c

来自「与Nucleus Plus配套的图形库」· C语言 代码 · 共 80 行

/*************************************************************************/
/*                                                                       */
/*         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          */
/*                                                                       */
/*      POLY3.c                                          1.9             */
/*                                                                       */
/* COMPONENT                                                             */
/*                                                                       */
/*      All                                                              */
/*                                                                       */
/* DESCRIPTION                                                           */
/*                                                                       */
/*      This file contains the InvertPoly 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"
#include "metmacs3.h"
#include "poly_4.h"


/* Function InvertPoly inverts the specified polygon(s) using the fill pattern
one (solid) and rasterOp XOR (2) transfer mode. */

void InvertPoly(int POLYCNT, polyHead *POLYHDR, point *POLYPTS)
{
	void __mwFP(void);

	if (grafPort.pnLevel < 0) return;/* nothing to do */
	if (POLYCNT <= 0) return;/* skip if no polygons */

	lclPOLYCNT = POLYCNT;	/* copy the input locally */
	lclPOLYHDR = POLYHDR;
	lclPOLYPTS = POLYPTS;

	grafBlit.blitRop = 14;	/* set up default blit record */ 

	__mwFP();	/* fill the polygon(s) */

	grafBlit.blitRop = grafPort.pnMode;	/* restore blit record */

	return;
}