Mark, thanks for the reply - I have included responses inline.
________________________________
From: Mark Adams [mailto:[EMAIL PROTECTED]
Sent: Thursday, December 21, 2006 5:24 PM
To: Varadaraj Yatirajula (WT01 - IP-Multimedia Carrier & Ent Networks)
Cc: [email protected]
Subject: Re: [directfb-users] Graphics and Video Layer
We are developing an application and need to Display a GUI on
the graphics layer (layer [edit] 0).
We also need to display video on the Video layer (layer [edit]
1) at the same time.
I am not sure of the combination of flags/options (ALPHA,
OPACITY etc) and the opacity values to be used for the two layers, so
that both the graphics and the video would be visible simultaneously.
I presume you want the primary (graphics) layer on top of the video
layer and want an alpha channel for the graphics layer so you can see
through to the video wherever there is no graphics? Is that correct?
[YG] Yes this is what I need.
For that, your hardware will need to support the LEVELS capability to
allow you to put the layers in that order, and the ALPHACHANNEL
capability for the primary layer to allow you to see through it. What
hardware are you using?
[YG] dfbinfo returns: (Looks like ALPHACHANNEL is supported, and LEVELS
is not supported?)
Layer (00) GDL Primary Layer (primary layer)
Type: GRAPHICS
Caps: SURFACE OPACITY ALPHACHANNEL
Layer (01) GDL Video Overlay
Type: VIDEO STILL_PICTURE BACKGROUND
Caps: SURFACE OPACITY SCREEN_LOCATION BRIGHTNESS CONTRAST
SATURATION SCREEN_POSITION SCREEN_SIZE
OPACITY is not relevant as that is used to set a global opacity value
for the whole plane. I don't think that's what you want.
[YG] No, I do not need global opacity.
Regards,
Mark
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