nanogui: revamping Blit() to work in portrait mode.
Subject:
Re: [nanogui] revamping Blit() to work in portrait mode.
From:
"EKS" ####@####.####
Date:
27 Jul 2001 09:25:50 -0000
Message-Id: <20010727092522.FKDR28105.tomts13-srv.bellnexxia.net@void-core.2y.net>
On Fri, 27 Jul 2001 04:10:12 -0500 (CDT), David Eger said:
>
> Let's say that I want to blit an image to the screen in portrait mode --
> should we have the user make an offscreen image (GrNewPixmap) and somehow
> have him place it sideways, or store all images in canonical coordinates,
> and have the Blit be smart enough to do a non-sequential mem-move()?
> Would the approach of having the driver do this last second be too slow?
>
> -David
hi all :)
I don't know about the precise implementation of the current Blit code, but the
low-level speed difference between a sequential and non-sequential move should
be very minimal, by the order of maybe 1 or 2 cycles per pixel, at least on
latest cpu.
Personally I would be considering having the Blit code be smart enough, helps
make this portrait mode handling transparent to applications.
--
Bandai Kaosu Jikuu
EKS - Dave Poirier
