Producing a Glowing Star with the Transparent Package and Pdflatex

Question

Consider the code:

\documentclass{book}
\textheight 8.5in \textwidth 5.75in 
\usepackage{xcolor}
%\usepackage{transparent}


\definecolor{darkpurple}{RGB}{48, 25, 52}

\usepackage{tikz}
\usetikzlibrary{fadings, calc}
\tikzfading[name=dim fade, inner color=transparent!40, outer color=transparent!100]
\tikzfading[name=bright fade, right color=transparent!100, left color=transparent!100, middle color=transparent!0]
\tikzfading[name=long bright fade, right color=transparent!100, left color=transparent!0]

\newcommand{\glowstar}[3][.5]{\fill[white,path fading=dim fade](#2)circle[radius=#1*.6];
    \foreach \t in {0,60,120}{
    \fill[rotate around={\t:(#2)}, white,path fading=bright fade]($(#2)-(.9*#1,0)$)--($(#2)-(0,.05*#1)$)--($(#2)+(.9*#1,0)$)--($(#2)+(0,.02*#1)$)--cycle;
    \fill[rotate around={\t:(#2)}, white,path fading=long bright fade]($(#2)-(.5*#1,0)$)--($(#2)-(0,.04*#1)$)--($(#2)+(.5*#1,0)$)--($(#2)+(0,.04*#1)$)--cycle;
    }
    \foreach \l [count=\n from 0] in {#3}{
        \fill[rotate around={\n*90:(#2)}, white,path fading=bright fade]($(#2)-(\l*#1,0)$)--($(#2)-(.4,.06*#1)$)--($(#2)+(.4,.06*#1)$)--cycle;
     }        
    \fill[white] (#2)circle[radius=#1*.13];
    }

\begin{document}
\thispagestyle{empty}
\begin{center}
\begin{tikzpicture}
\fill[darkpurple] rectangle (8,6);
\glowstar[1.8]{4,3}{1,1,1,1}% length of left,bottom,right,top
\end{tikzpicture}
\end{center}
\end{document}

which produces what I want:

However, I want to use this for a document which requires the transparent package and compiles with pdflatex.

But, when I run the above code with \usepackage{transparent}, the following is produced:

QUESTION: How may I produce the first output while invoking the transparent package and compiling with pdflatex?

Thank you.

Answer 1

My guess is that you are using an old version of transparent. You can see in the manual history section that the pgf(TikZ) compatibility was added in 2018:

[2018/11/18 v1.3] • Added code for pgf compatibility, see https://github.com/ho-tex/transparent/issues/1

The link gives this patch by u-fischer:

\documentclass{article}
\usepackage{tikz}
\usepackage{transparent}

\makeatletter
\begingroup\expandafter\expandafter\expandafter\endgroup
\expandafter\ifx\csname pgfutil@addpdfresource@extgs\endcsname\relax
\else
  \AtBeginDocument{%
    % \pgf@sys@addpdfresource@extgs@plain{%
    \pgfutil@addpdfresource@extgs{%
      \TRP@list
    }%
  }%
  \let\TRP@addresource\relax
\fi
\makeatother

\begin{document}
Hello \texttransparent{.3}{World}
\begin{tikzpicture}
\filldraw[opacity=.5] (0,0) rectangle (1,1);
\end{tikzpicture}
\makeatletter
\end{document}

I have no way of testing this, and it should also not be needed. -upgrade and update your LaTeX installtion.