rockbox/manual/advanced_topics/viewports/grayscale-vp-syntax.tex

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\subsubsection{Viewport Declaration Syntax}
{\config{\%V}}{\textbar}x{\textbar}y{\textbar}[width]{\textbar}[height]{\textbar}[font]{\textbar}[fgshade]{\textbar}[bgshade]{\textbar}%
\begin{itemize}
\item 'fgshade' and bgshade are numbers in the range '0' (= black) to '3'
(= white).
\item 'font' is a number - '0' is the built-in system font, '1' is the
user-selected font.
\item Only the coordinates \emph{have} to be specified. Leaving the other
definitions blank will set them to their default values.
\note{The correct number of {\textbar}s with hyphens in blank fields
are still needed in any case.}
\end{itemize}
\begin{example}
%V|12|20|-|-|1|-|-|
%sThis viewport is displayed permanently. It starts 12px from the left and
%s20px from the top of the screen, and fills the rest of the screen from
%sthat point. The lines will scroll if this text does not fit in the viewport.
%sThe user font is used, as are the default foreground/background shades.
\end{example}
\begin{rbtabular}{.75\textwidth}{XX}{Viewport definition & Default value}{}{}
width/height & remaining part of screen \\
font & user defined \\
shade & black foreground on white background \\
\end{rbtabular}