On Sat, Apr 05, 2003 at 09:58:13PM +0200, Denis Oliver Kropp wrote:
> Quoting Ville Syrj�l� ([EMAIL PROTECTED]):
> > On Sat, Apr 05, 2003 at 09:05:01PM +0200, Denis Oliver Kropp wrote:
> > > Quoting Ben Lamb ([EMAIL PROTECTED]):
> > > > Is it possible to draw translucent text in DirectFB?
> > >
> > > The current implementation ignores the alpha value,
> > > but the implementation should be changed to the behaviour
> > > you expected.
> >
> > What did you have in mind? Check the DSDRAW_BLEND flag in
> > dfb_gfxcard_draw{string,glyph}() functions and add the
> > DSBLIT_BLEND_COLORALPHA flag to the font state?
>
> That should also be possible, but more important is honoring
> the alpha value with DSDRAW_NOFX. RGB values should be modified
> like before but the written alpha value should be influenced.
Maybe I misunderstood what you just said... You want to honour the color
alpha with DSDRAW_NOFX?
Or were you talking about the source alpha? I don't see a problem with
source alpha but then again I'm not very familiar with that code.
To me it looks lile for DSDRAW_NOFX we should use
DSBLIT_BLEND_ALPHACHANNEL just like before.
For DSDRAW_BLEND both DSBLIT_BLEND_ALPHACHANNEL and
DSBLIT_BLEND_COLORALPHA should be set. AFAICS this
should make the code use Dacc_modulate_alpha().
Maybe I'm missing something...
--
Ville Syrj�l�
[EMAIL PROTECTED]
http://www.sci.fi/~syrjala/
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