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From: pete@utcsscb.UUCP
Newsgroups: comp.sys.atari.st
Subject: Re: help! vro_cpyfm, vrt_cpyfm
Message-ID: <581@utcsscb.UUCP>
Date: Mon, 23-Mar-87 21:32:44 EST
Article-I.D.: utcsscb.581
Posted: Mon Mar 23 21:32:44 1987
Date-Received: Tue, 24-Mar-87 04:33:00 EST
References: <8703171353.AA13091@ucbvax.Berkeley.EDU> <1987Mar18.014408.23167@gpu.utcs.toronto.edu> <709@viper.UUCP>
Reply-To: pete@utcsscb.UUCP (Peter Santangeli)
Organization: Univ. of Toronto - Scarborough Campus "B" VAX
Lines: 43
Keywords: vro_cpyform vro_cpyfm
Summary: 

In article <709@viper.UUCP> john@viper.UUCP (John Stanley) writes:
>In article <1987Mar18.014408.23167@gpu.utcs.toronto.edu> 
>pete@gpu.utcs.UUCP (Peter Santangeli) writes:
> >
> >[well written description of vro_cpyform...]
(Blush!)
>
> >...(vro_cpyfm is similar, so I will stick with vro_cpyform)....
>
>Mind telling us what the differences are (if any)?

Sorry. vro_cpyfm is known of in the Abacus books as "copy raster, transparent"
whereby vro_cpyform is "copy raster, opaque" vro_cpyfm takes one extra paramete
r and is used for color systems. The parameter is the color index of the 
raster to be copied to. I have never used this, being a "mono person" for the
most part. I believe it lets you move only one color plane of an image.

> >	"pxyarray" is a standard GEM input array which describes the 
> >offsets and sizes of the rectangles within each memory area described by
> >the MFDB's that will be transfered.
>
>You give enough details for all the -other- parameters that someone could
>use the function without needing further documention.  How about describing
>pxyarray so other people will know enough to use it??

The pxyarray is an integer array containing diagonally opposite corners of
the source and destination rasters (blocks) as follows:
	xs1 ys1 xs2 ys2 xd1 yd1 xd2 yd2			(got that? :-)

>(Why tell people just enough to -almost- be able to use it?)

I (mistakenly) assumed that all that was needed was clarificationof the
use of the calls. How can ANYONE do developpement on the system without
AT LEAST the Abacus books? It is beyond me.
>
>--- 
>John Stanley (john@viper.UUCP)
>Software Consultant - DynaSoft Systems
>UUCP: ...{amdahl,ihnp4,rutgers}!{meccts,dayton}!viper!john

					Pete Santangeli
					pete@utgpu