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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - Unify the format conversion code"
href="https://bugs.freedesktop.org/show_bug.cgi?id=84566#c29">Comment # 29</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - Unify the format conversion code"
href="https://bugs.freedesktop.org/show_bug.cgi?id=84566">bug 84566</a>
from <span class="vcard"><a class="email" href="mailto:itoral@igalia.com" title="Iago Toral <itoral@igalia.com>"> <span class="fn">Iago Toral</span></a>
</span></b>
<pre>(In reply to Jason Ekstrand from <a href="show_bug.cgi?id=84566#c26">comment #26</a>)
<span class="quote">> (In reply to Iago Toral from <a href="show_bug.cgi?id=84566#c24">comment #24</a>)
> > Jason, what do you think we should do for GL_COLOR_INDEX + GL_BITMAP?
> >
> > Currently this is handled as a special case in the texstore.c ubyte path
> > (store_ubyte_texture), specifically, the special case handles extracting
> > indexed color data so that the incoming pixels can be represented as an RGBA
> > image, then do the conversion from RGBA to dst normally.
> >
> > We do not have a Mesa format for this combination.
> >
> > I think we have two options:
> > 1) I guess we could create a mesa_format, detect this case specifically in
> > the master function and handle it there.
> > 2) The other option would be to let clients deal with it. That would involve
> > letting them transform it to RGBA before they call the master function.
> >
> > What do you think?
>
> Option 2. Mesa internally hasn't supported color index in a long time,
> let's not add it back.</span >
What do you mean by not supporting it internally? As I mention in my reply to
Kenneth I see multiple references to GL_COLOR_INDEX in Mesa, there is a
specific path to deal with it in texstore and there are even piglit tests for
this that pass in master...
Just to be clear, when I said "clients" in option 2) I meant clients of the
master function inside Mesa (so things like texstore.c). My idea was that
things like texstore would handle GL_COLOR_INDEX and take care of converting it
to RGBA on their own before calling the master function, but if you say that
GL_COLOR_INDEX is not really supported any more, maybe we should just ignore it
completely and do nothing about it in texstore and friends?</pre>
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