Hi All,
I jump back in. I will cite anybody because what has been said is correct.
But,
1) trying to compare a browser, XeTex engine and LuaTeX will not help
as they have different methods of composing their output.
That is how they compose and position their glyphs.
2) Most important a composed Unicode glyph is supposed to be just one
color!!
3) Once you start using color a Unicode composed glyph you no longer
are positioning
a single composed glyph, but two or more glyphs.
3.a) color designed in TeX at.al is designed be applied to a box and
not glyphs!!
The question remains how to position the composed glyphs and where and how the
color attribute
is added to the output.
There are therefore two solutions:
1) The Tex way:
create a macro to compose the glyph and do the positioning and
coloring.
2) The developer way:
change the engine so that it firsts generates the composed
glyph and then goes back
and then applies color to the different glyphs.
Such a change most likely will not happen for XeTeX, as the development has
staled or if you wish is frozen.
LuaTex is still under development and can be adjusted.
regards
Keith.
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