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Path: utzoo!utgpu!water!watmath!clyde!rutgers!cbmvax!phillip
From: phillip@cbmvax.UUCP
Newsgroups: comp.sys.amiga
Subject: Re: GetScreenData()
Message-ID: <1964@cbmvax.cbmvax.cbm.UUCP>
Date: Tue, 2-Jun-87 08:26:51 EDT
Article-I.D.: cbmvax.1964
Posted: Tue Jun  2 08:26:51 1987
Date-Received: Thu, 4-Jun-87 06:03:54 EDT
References: <1237@batcomputer.tn.cornell.edu>
Organization: Commodore Technology, West Chester, PA
Lines: 42

in article <1237@batcomputer.tn.cornell.edu>, hsgj@batcomputer.tn.cornell.edu (Dan Green) says:
> 
> 
> Could anyone post or email me on what arguments GetScreenData() requires
> and what structure ptr it returns?  Thanks much,
 
       Success = GetScreenData(Buffer, Size, Type, Screen ) 
	D0			A0	D0    D1    A1

	BOOL   Success; 	/* TRUE == EVERYTHING A_O_K */
	CPTR   Buffer;
	USHORT Size;
	USHORT Type;
/*
 * "Screen" IGNORED IF ( TYPE == WBENCHSCREEN )
 *  ELSE COPIES "Size" BYTES FROM "Screen" to "Buffer"
 */
	struct Screen *Screen;
----------------------------------------------------
long screendefaults(width,height,modes)
SHORT *width, *height;
UWORD *modes;
{
 extern LONG	GetScreenData();
 struct Screen	wbscreen;

 if(!(GetScreenData(&wbscreen,(ULONG)sizeof(struct Screen),WBENCHSCREEN,NULL)))
	return(FALSE);	

 *width  = wbscreen.Width;
 *height = wbscreen.Height;
 *modes  = wbscreen.ViewPort.Modes;   

 return(TRUE);
}

-phil
==============================================================================
Phillip (Flip) Lindsay - Commodore Business Machines - Amiga Technical Support
  UUCP: {ihnp4|seismo|caip}!cbmvax!phillip      - Phone: (215) 431-9180
  No warranty is implied or otherwise given in the form of suggestion or 
  example. Any opinions found here are of my making.