[MPlayer-dev-eng] future plans for libvo draw_osd()

[Ilja Kamps]

On Fri, May 25, 2007 at 10:01:31PM +0400, Evgeniy Stepanov wrote:
> On Friday 25 May 2007, Attila Kinali wrote:
> > On Fri, 25 May 2007 01:55:39 +0400
> >
> > Evgeniy Stepanov <eugeni.stepanov at gmail.com> wrote:
> > > Have a look at EOSD (grep in libmpcodecs). It supports color and, imho,
> > > is better designed. It is used to display subtitles with libass. The old
> > > subtitle code, which draw_osd() is part of, is currently unmaintained.
> >
> > Would it be possible to run all OSD trough EOSD? If so, this
> > would solve the B/W problem with DVD subs. Though for some badly
> > made DVDs it should be possible to switch back to the B/W subs.
> 
> Yes, but it will need some improvements. Currently ass_image_t contains a 
> single color + a bitmap of transparency values. For DVD subtitles we need 
> true RGBA or YUVA bitmaps. Such bitmaps will be also useful in libass (for 
> both speed and correctness). This can be solved by adding a 'type' or 'csp' 
> field in ass_image_t.

Actually DVD subtitles are 4 bit palletted images, so you could do it in
4 passes with the current ASS renderer.