Background applied by AddShipoutPictureBG does not reach edge of page

Question

I want to apply a background image to a document, but it seems to fail to cover the bottom and the right side of the pictures.

I started using the eso-pic example from here.

Simplifying my document I find that

\documentclass[a4paper,10pt]{article}

\usepackage{fullpage} 
\usepackage{eso-pic,graphicx}
\usepackage{hyperref}

\addtolength{\textwidth}{2cm}
\addtolength{\hoffset}{-1cm}
\addtolength{\textheight}{3cm}
\addtolength{\voffset}{-1.5cm}

\begin{document}

\AddToShipoutPictureBG*{
    \includegraphics[width=\paperwidth,height=\paperheight]{example-image-a}
};

\pagestyle{empty} % non-numbered pages

\end{document}

creates an image like below :

Where the white regions are the part of the page which are not covered by the image. How might I ensure the background image covers the entire page?

Strangely I fine that I can get rid of the bottom margin by removing the "\usepackage{hyperref}." This seems related to this question : Why does the hyperref package change the paper size?

However even without the hyperref package the right margin remains uncovered.

Cheers and thanks, Charles.

Answer 1

You either need to correct for your adjustment of \hoffset and \voffset - the reason behind the white areas showing on the page, or you need to get rid of them altogether.

With \hoffset and \voffset adjustments:

\documentclass{article}

\usepackage{eso-pic,graphicx}

%\addtolength{\textwidth}{2cm}
\addtolength{\hoffset}{-1cm}
%\addtolength{\textheight}{3cm}
\addtolength{\voffset}{-1.5cm}

\begin{document}

\AddToShipoutPictureBG*{%
  \AtPageLowerLeft{%
    \hspace{1cm}% \hoffset adjustment
    \raisebox{-1.5cm}{% \voffset adjustment
      \includegraphics[width=\paperwidth,height=\paperheight]{example-image}% Background image
    }% \raisebox
  }% \AtPageLowerLeft
}% \AddToShipoutPictureBG*

\pagestyle{empty} % non-numbered pages

\mbox{}% Place something on the page in order for it to ship out

\end{document}

Without the \hoffset and \voffset adjustment:

\documentclass{article}

\usepackage{eso-pic,graphicx}

\begin{document}

\AddToShipoutPictureBG*{%
  \AtPageLowerLeft{%
    \includegraphics[width=\paperwidth,height=\paperheight]{example-image}% Background image
  }% \AtPageLowerLeft
}% \AddToShipoutPictureBG*

\pagestyle{empty} % non-numbered pages

\mbox{}% Place something on the page in order for it to ship out

\end{document}

The explicit placement of the background image \AtPageLowerLeft is not necessary, but it helps understand the code.