fontspec for small caps and nocommon ligatures (actually, rawfeatures works, but not ligatures=NoCommon)

Question

(This is a bit of a mess, so apologies. The final solution ended up being in a different place than I first expected. Ultimately, what was happening is a combination of a bug in Linux Libertine O, and that it appears to me that fontspec, with TTF fonts, will not respect Ligatures=Rare, etc, but will respect RawFeature=+hlig, and other equivalents. see below for fuller explanation and final working solution, though not explanation for why it worked.)

[original post] I am trying to typeset a document for someone who wants to use a handwritten font. However the font does not have bold, italic, or bold italic, so I have found 3 other appropriate fonts, and am using fontspec to switch between these. But, for small caps, he wants to use linux libertine O but vary the color. Lastly, and most importantly, it appears that LLO is using a ligature for Th, and I want to use a non-ligated version.

I can get the various colors to work, but I can't seem to apply the ligatures=NoCommon to the smallcaps font.

The code below is from lyx. The "ThStrictWurtziteFirefly"'s are there so I can see the ligatures.

OK, this is my best effort:

\fontspec{Linux Libertine O}

ThStrictWurtziteFirefly \textsc{ThStrictWurtziteFirefly}Th \textbf{Th}
\textit{Th }\textbf{\textit{Th}}\textsc{ Th }\textbf{\textsc{Th}}\textbf{\textit{
}}{\itshape {\scshape Th}}{\bfseries \itshape {\scshape Th}}

\addfontfeature{Ligatures=Historic}ThStrictWurtziteFirefly \textsc{ThStrictWurtziteFirefly}
Th \textbf{Th} \textit{Th }\textbf{\textit{Th}}\textsc{ Th }\textbf{\textsc{Th}}\textbf{\textit{
}}{\itshape {\scshape Th}}{\bfseries \itshape {\scshape Th}}

\addfontfeature{Ligatures={Rare}}ThStrictWurtziteFirefly \textsc{ThStrictWurtziteFirefly}
Th \textbf{Th} \textit{Th }\textbf{\textit{Th}}\textsc{ Th }\textbf{\textsc{Th}}\textbf{\textit{
}}{\itshape {\scshape Th}}{\bfseries \itshape {\scshape Th}}

\addfontfeature{Ligatures={NoCommon}}ThStrictWurtziteFirefly \textsc{ThStrictWurtziteFirefly}
Th \textbf{Th} \textit{Th }\textbf{\textit{Th}}\textsc{ Th }\textbf{\textsc{Th}}\textbf{\textit{
}}{\itshape {\scshape Th}}{\bfseries \itshape {\scshape Th}}

----

\fontspec{Linux Libertine O}0 ThStrictWurtziteFirefly \textsc{ThStrictWurtziteFirefly}
Th \textbf{Th} \textit{Th }\textbf{\textit{Th}}\textsc{ Th }\textbf{\textsc{Th}}\textbf{\textit{
}}{\itshape {\scshape Th}}{\bfseries \itshape {\scshape Th}}

\addfontfeature{UprightFont={SNsanafonmaruP},UprightFeatures={SmallCapsFont={Linux Libertine Capitals O}, SmallCapsFeatures = {Ligatures={NoCommon},Color=1470CF}}}1
ThStrictWurtziteFirefly \textsc{ThStrictWurtziteFirefly} Th \textbf{Th}
\textit{Th }\textbf{\textit{Th}}\textsc{ Th }\textbf{\textsc{Th}}\textbf{\textit{
}}{\itshape {\scshape Th}}{\bfseries \itshape {\scshape Th}}

\addfontfeature{BoldFont={SNsanafonkakuP}, BoldFeatures={Color = 470CF1,SmallCapsFont={Linux Libertine Capitals O}, SmallCapsFeatures = {Ligatures={NoCommon}, Color=70CF14} }}2
ThStrictWurtziteFirefly \textsc{ThStrictWurtziteFirefly} Th \textbf{Th}
\textit{Th }\textbf{\textit{Th}}\textsc{ Th }\textbf{\textsc{Th}}\textbf{\textit{
}}{\itshape {\scshape Th}}{\bfseries \itshape {\scshape Th}}

\addfontfeature{ItalicFont={SNsanafonP}, ItalicFeatures={Color = 0CF147, SmallCapsFont={Linux Libertine Capitals O}, SmallCapsFeatures = {Ligatures={NoCommon},Color=CF1470}}}3
ThStrictWurtziteFirefly \textsc{ThStrictWurtziteFirefly} Th \textbf{Th}
\textit{Th }\textbf{\textit{Th}}\textsc{ Th }\textbf{\textsc{Th}}\textbf{\textit{
}}{\itshape {\scshape Th}}{\bfseries \itshape {\scshape Th}}

\addfontfeature{BoldItalicFont={nagurigaki}, BoldItalicFeatures={ Color = 888844, SmallCapsFont={Linux Libertine Capitals O}, SmallCapsFeatures = {Ligatures={NoCommon}, Color=444422}}}4
ThStrictWurtziteFirefly \textsc{ThStrictWurtziteFirefly} Th \textbf{Th}
\textit{Th }\textbf{\textit{Th}}\textsc{ Th }\textbf{\textsc{Th}}\textbf{\textit{
}}{\itshape {\scshape Th}}{\bfseries \itshape {\scshape Th}}

Th Upright {\scshape Th  Small Caps}\\ 
\itshape Th Italic {\scshape Th Italic Small Caps}\\ 
\upshape\bfseries Th Bold {\scshape Th Bold Small Caps}\\ 
\itshape Th Bold Italic {\scshape Th Bold Italic Small Caps}

Thx in advance for any help...

[update] I just [found out][1] that this is actually a bug in linux libertine o, due to "Automatically produced font substyles" that they are not going to fix and recommend using "Open Type Features". I am not sure what this means, but I will hit the books and figure it out. Shows to go ya...

see below for my final answer.

Answer 1

I was able to get this to work using RawFeature=+smcp even though Ligatures=NoCommon, Rare, etc don't work. Only using raw feature works. Go figure. I think -liga would also have worked. I wonder why this is happening. Perhaps that is a question for another time.

Final Solution:

\setmainfont[Mapping= tex-text,  %
    SmallCapsFont={Linux Libertine O},   %
    SmallCapsFeatures= {Color=111111, RawFeature={+smcp,+hlig,+dlig}},   %
    BoldFont={SNsanafonmaruP},   %
    BoldFeatures={Color = 470CF1,AutoFakeBold=4,FakeBold=4,SmallCapsFont={Linux Libertine Capitals O Bold},%
    SmallCapsFeatures = { Color=70CF14,   RawFeature={+smcp,+hlig,+dlig}} },  %
    ItalicFont={SNsanafonkakuP},   %
    ItalicFeatures={Color = 0CF147,AutoFakeBold=2,FakeBold=1,SmallCapsFont={Linux Libertine Capitals O Italic}, %
    SmallCapsFeatures = {Color=CF1470,RawFeature={+smcp,+hlig,+dlig}}},   BoldItalicFont={nagurigaki},   %
    BoldItalicFeatures={ Color = F1470C,SmallCapsFont={Linux Libertine Capitals O Bold Italic},  %
    SmallCapsFeatures = { Color=24680B,RawFeature={+smcp,+hlig,+dlig}}} ]{SNsanafonmaruP}