Re: DVD menu highlight is always rectangular

Adam Nielsen <a.nielsen-HxjuLhO6/[email protected]>
Newsgroups gmane.comp.multimedia.dvdauthor.user
Message-ID <[email protected]>
Thanks for the quick replies!

> DVD-Video buttons are always rectangular. However, you can choose which
> pixels within the rectangle are different between the “normal” and
> “highlighted” states of the button.

I just realised after some more experimenting this might be an issue with 
MPlayer's dvdnav:// code, as it seems to only colour the entire rectangle. 
Playing the same content with Xine did show my arrows, but all arrows were 
visible the whole time.  IIRC though in that test the button rectangles did 
not overlap the arrows which could explain why.

At any rate, this is what I had done to try to make a coloured arrow appear 
next to a list of menu items, and as the up/down arrows are pressed the arrow 
moves up and down (and menu items that are not currently selected do not have 
an arrow next to them.)  Please let me know if it sounds correct!

I created an image with all seven arrows visible in black (for seven menu 
selections.)  I then created seven rectangles, each enclosing a single arrow. 
  I set the palette for "normal" so that all four colours were transparent, 
and for selected+highlighted the first colour was still transparent and the 
other three were coloured.

It is my understanding that that the menu image is shown the entire time (with 
all four colours as transparent in my case) and as the button rectangle is 
moved around, the menu image within the rectangle is drawn in one of the 
alternate set of colours.

Is that correct?  I'm just guessing as I don't think I've seen it explained in 
so many words anywhere before!  Unfortunately I lack a real DVD player to test 
this with, and it seems that MPlayer isn't 100% accurate and I'm still not 
sure about Xine.

Also for the record I am using dvd_menu_animator[1] to generate the images, 
and it is correctly producing four colour indexed files.

Many thanks,
Adam.

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