related:
后者似乎是texhigh用的方式:
% texhigh.prelude.ths Line101
\@ifpackageloaded{tikz}{\@texhighload@tikztrue}{}
\newbox\texhigh@picturebox
\if@texhighload@tikz
\RequirePackage{tikz}
\usetikzlibrary{shadings}
\usetikzlibrary{fill.image}
\protected\def\texhigh@shadetext#1#2{%
\setbox\texhigh@picturebox=\hbox{{\texhigh@pdfliteral{7 Tr }#2}}%
\tikz[baseline=0,line width=0pt]\path\pgfextra{\rlap{\copy\texhigh@picturebox}}
[#1] (0,-\dp\texhigh@picturebox) rectangle (\wd\texhigh@picturebox,\ht\texhigh@picturebox);}
\tikzset{texhigh/.is family,
texhigh/gradient primitive/.style={left color=blue,right color=cyan},
texhigh/gradient ?/.style={left color=red,right color=blue},
texhigh/gradient-style/.style={texhigh/gradient #1}}
\THSaveStyle{tikz.gradient}{%
\THSetClassCS{latex}{\texhigh@underline{\THcolor{purple}\bfseries#1#2}}
\THSetClassCS{primitive}
{\texhigh@shadetext{texhigh/gradient-style=primitive}{\bfseries #1#2}}%
\THSetClassCS{?}{\texhigh@shadetext{texhigh/gradient-style=?}{#1#2}}%
}





















问 『未完全解决』想实现如下的渐变文字,当下使用LaTeX有哪些可能的实践?