On Thu, 2014-11-20 at 09:55 +0100, Iago Toral wrote:
> On Thu, 2014-11-20 at 08:15 +0100, Samuel Iglesias Gonsálvez wrote:
> > On Tue, 2014-11-18 at 11:08 -0800, Jason Ekstrand wrote:
> > >
> > >
> > > On Tue, Nov 18, 2014 at 12:44 AM, Iago Toral Quiroga
> > > <ito...@igalia.com> wrote:
> > > From: Samuel Iglesias Gonsalvez <sigles...@igalia.com>
> > >
> > > Signed-off-by: Samuel Iglesias Gonsalvez
> > > <sigles...@igalia.com>
> > > ---
> > > src/mesa/main/format_pack.c.mako | 10 +++++++++-
> > > 1 file changed, 9 insertions(+), 1 deletion(-)
> > >
> > > diff --git a/src/mesa/main/format_pack.c.mako
> > > b/src/mesa/main/format_pack.c.mako
> > > index b9f4656..97adf6e 100644
> > > --- a/src/mesa/main/format_pack.c.mako
> > > +++ b/src/mesa/main/format_pack.c.mako
> > > @@ -84,7 +84,15 @@ pack_ubyte_${f.short_name()}(const GLubyte
> > > src[4], void *dst)
> > > %endif
> > >
> > > ${channel_datatype(c)} ${c.name} =
> > > - %if c.type == parser.UNSIGNED:
> > > + %if not f.is_normalized():
> > > + %if c.type == parser.FLOAT and c.size == 32:
> > > + UBYTE_TO_FLOAT(src[${i}]);
> > > + %elif c.type == parser.FLOAT and c.size == 16:
> > > + _mesa_float_to_half(UBYTE_TO_FLOAT(src[${i}]));
> > >
> > >
> > > Same question here as in the previous patch. Why are we using
> > > UBYTE_TO_FLOAT?
> > >
> >
> > This is what current format_pack.c is doing for those formats and some
> > piglit tests complain if it is not there.
> >
>
> Jason, this looks correct to me: we are packing from an ubyte type to a
> half float type, so first we need to convert from ubyte to float and
> then downgrade the float to a half float, we don't currently have means
> to convert directly from an ubyte to a half float, right?
>
> Iago
>
Notice that we are converting from ubyte type source to float formats,
hence the use of UBYTE_TO_FLOAT().
I'm going to split the conditions in two (one for converting to non
integer formats, other for non normalized integer formats) to make it
clearer.
Sam
> > >
> > > + %else:
> > > + (${channel_datatype(c)}) src[${i}];
> > > + %endif
> > > + %elif c.type == parser.UNSIGNED:
> > > %if f.colorspace == 'srgb' and c.name in 'rgb':
> > > util_format_linear_to_srgb_8unorm(src[${i}]);
> > > %else:
> > > --
> > > 1.9.1
> > >
> > > _______________________________________________
> > > mesa-dev mailing list
> > > mesa-dev@lists.freedesktop.org
> > > http://lists.freedesktop.org/mailman/listinfo/mesa-dev
> > >
> > >
> > > _______________________________________________
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> >
> >
>
>
>
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