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%% ****************************************************************************************************
%%   Copyright 2024 by Mingyu Hsia <xiamyphys@gmail.com>                                              *
%%                                                                                                    *
%%   This work may be distributed and/or modified under          *           *****       *    *       *
%%   the conditions of the LaTeX Project Public License          *      ** *   *    ***   *  *        *
%%                                                               *     *  **   *   *   *   **         *
%%       http://www.latex-project.org/lppl.txt                   *     *   *   *   *****   **         *
%%                                                               *     *  **   *   *      *  *        *
%%   either version 1.3c of this license or any later            *****  ** *   *    ***  *    *       *
%%   version.                                                                                         *
%%                                                                                                    *
%%   This work has the LPPL maintenance status `maintained'.                                          *
%%                                                                                                    *
%%   The Current Maintainer of this work is Mingyu Hsia.                                              *
%%                                                                                                    *
%%   This work consists of the files fadingimage.sty,                                                 *
%%                               and README.md.                                                       *
%%   available at https://github.com/xiamyphys/FadingImage                                            *
%% ****************************************************************************************************
\NeedsTeXFormat{LaTeX2e}[2020/10/01]
\ProvidesPackage{fadingimage}[2024/03/11/ v0.1c Package for adding fading full width picture at the top or bottom of a page.]

\RequirePackage{tikz,xcolor}
\usetikzlibrary{fadings}
\NewDocumentCommand{\UPFadingImage}{ s O{} m }{
    \IfBooleanTF{#1}{
        \tikz[remember picture,overlay]
            \node[below,inner sep=0pt,outer sep=auto] at (current page.north) {\includegraphics[width=\paperwidth,#2]{#3}};
    }{
        \tikz[remember picture,overlay]
            \node[scope fading=south,below,inner sep=0pt,outer sep=auto] at (current page.north) {\includegraphics[width=\paperwidth,#2]{#3}};
    }
}
\NewDocumentCommand{\LOWFadingImage}{ s O{} m }{
    \IfBooleanTF{#1}{
        \tikz[remember picture,overlay]
            \node[above,inner sep=0pt,outer sep=auto] at (current page.south) {\includegraphics[width=\paperwidth,#2]{#3}};
    }{
        \tikz[remember picture,overlay]
            \node[scope fading=north,above,inner sep=0pt,outer sep=auto] at (current page.south) {\includegraphics[width=\paperwidth,#2]{#3}};
    }
}