Re: Xrender extension docs anywhere?

[David Jeske <jeske@chat.net>]

On Tue, Jul 08, 2003 at 01:38:45PM +0200, Sven Luther wrote:
> > I've never seen a second hardware cursor mentioned in hardware docs.
> > Which graphics hardware supports these ?

I don't have a complete list, but recent nvidia chips and the r128
have a second hardware cursor, and many recent chips have a full-color
cursor (64x64x32bpp) (nvidia, the entire radeon line).

> Well, some card have upto 4 channels, main, overlay, underlay and
> cursor. I guess the more common is 2 or 3 channels, with one for the
> framebuffer, one for the cursor and the last for the video overlay. It
> is also possible sometime to use the channels of the second head on the
> first head.

While it's true that one could use the overlays for cursors, I don't
think Windows does this. I'm curious how they get drag icons to drag
so solidly even when they are big. (group select a bunch of files and
drag them and the drag icon is alot bigger than 64x64)

I'm trying to find a contact who is in-the-know about nitty-gritty
win32 details.

> Recent versions of Render support full color cursors with an alpha
> channel which it should be possible to use to these to draw many
> drag icons.

This is great. I'll check it out.

> Basically all the relevant docs are in the X distribution 
>  
>  xc/doc/specs/Render
>  xc/lib/Xcursor/Xcursor.man

Thanks!

-- 
David Jeske (N9LCA) + http://www.chat.net/~jeske/ + jeske@chat.net
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