[mythtv] Re: [experimental patch] vbi decoder for IVTV cards

Robert Johnston anaerin at gmail.com
Thu Apr 7 13:55:42 UTC 2005


On Apr 7, 2005 7:09 AM, Johan Duinkerken <johan at duinkerken.nu> wrote:
> To be short: if you've got b&w teletext, it might be worth the try to
> switch XvMC off.

In XvMC, all overlays are b&w, including overlay menus, OSD and Subtitles.

It's a shame there's no way to use an alpha mask with XvMC (in 24(32)-bit RGBA)

Looking through the XvMC spec, however, I see they have a "Composite"
function, and there is some talk on the Xine-dev list about using the
Composite for OSD...

>From what I can see, you render to a XvMC subpicture, and call "Blend" on it.

Here's an example using GLXGears, but the thoery is (Or at least
should be) the same

http://lists.freedesktop.org/pipermail/xserver/2004-May/001492.html


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