From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <ee9e417a050131100179bb8610@mail.gmail.com>
Date: Mon, 31 Jan 2005 13:01:32 -0500
From: Russ Cox <russcox@gmail.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@cse.psu.edu>
Subject: Re: [9fans] point2rgb and point2rgba
In-Reply-To: <673bb0f7f7be8c76f1db56fb175f06a9@plan9.ucalgary.ca>
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> here are the prototypes:
> 
> point2rgb(Image *, Point, uchar *r, uchar *g, uchar *b)
> point2rgb(Image *, Point, uchar *r, uchar *g, uchar *b, uchar *alpha)
> 
> s/uchar/int/ if you think it's better...

i'd just make it

ulong point2rgba(Image*, Point)

but i question the utility.  if you want just one
pixel, fine, but how often does that happen?
you probably want many pixels, in which case
you should use unloadimage anyway.

each call to point2rgba would have to do
multiple 9p transactions with the draw server.
for anything that processes an entire image,
unloadimage is the right way to go.

russ