Add a description of the bacdrop functionality and include description of relevant options for greyscale targets too

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11522 a1c6a512-1295-4272-9138-f99709370657

manual/advanced_topics/main.tex

@@ -38,6 +38,19 @@ If your language is not yet supported and you want to write your own language
 file find the instructions on the Rockbox website:
 \wikilink{HowtoUpdateLangfile}
 
+\nopt{archos}{%
+  \subsection{\label{ref:LoadingBackdrops}Loading Backdrops}
+  Rockbox supports showing an image as a backdrop in the \setting{File Browser}
+  and the menus. The backdrop image must be a \fname{.bmp} file of the exact
+  same dimensions as the display in your \dap{} (\genericimg{} with the last
+  number giving the colour depth in bits). To use an image as a backdrop browse
+  to it in the \setting{File Browser} and open the \setting{File Menu}
+  (see \reference{ref:Filemenu}) on it and select the option
+  \setting{Set As Backdrop}. If you want rockbox to remember your
+  backdrop the next time you start your \dap{} the backdrop must be placed in
+  the \fname{/.rockbox/backdrops} folder.
+}%
+
 \section{\label{ref:ConfiguringtheWPS}Configuring the WPS}
 
 \subsection{WPS -- General Info}
@@ -197,19 +210,20 @@ displaying images:
   \item Load and always show the image, using the \config{\%x} tag
   \item Preload the image with \config{\%xl} and show it with \config{\%xd}. 
     This way you can have your images displayed conditionally.
-    \opt{HAVE_LCD_COLOR}{
+    \nopt{archos}{%
     \item Load an image and show as backdrop using the \config{\%X} tag. The 
       image must be of the same exact dimensions as your display.
-    }
+    }%
 \end{enumerate}
 
-\optv{HAVE_LCD_COLOR}{
+\optv{SWCODEC}{% This doesn't depend on SWCODEC but we don't have a \noptv
+               % command.
   Example on background image use:
   \begin{example}
     %X|background.bmp|
   \end{example}
   The image with filename \fname{background.bmp} is loaded and used in the WPS.
-}
+}%
 
 Example on bitmap preloading and use:
 \begin{example}

manual/appendix/config_file_options.tex

@@ -183,8 +183,11 @@
       disk poweroff & on, off           & N/A\\
     }%
     
-    \opt{HAVE_LCD_COLOR}{
+    \nopt{archos}{%
       backdrop      & /path/filename.bmp    & N/A\\
+    }%
+    
+    \opt{HAVE_LCD_COLOR}{
       foreground color & 000000 to FFFFFF   & RRGGBB\\
       background color & 000000 to FFFFFF   & RRGGBB\\
     }

manual/appendix/wps_tags.tex

@@ -165,11 +165,11 @@ Ffwd{\textbar}Rew{\textgreater}}
 \section{Images}
 \begin{table}
   \begin{tagmap}{}{}
-    \opt{h300,x5,ipodcolor,ipodvideo}{
+    \nopt{archos}{%
     \config{\%X{\textbar}filename.bmp{\textbar}}
         & Load and set a backdrop image for the WPS. %
           This image must be exactly the same size as your LCD.\\
-    }
+    }%
     \config{\%P{\textbar}filename.bmp{\textbar}}
         & Load a Progress bar image for the WPS. Use \config{\%pb} tag to show the 
           progress bar\\

manual/configure_rockbox/display_options.tex

@@ -94,12 +94,13 @@
       of inverted text (\setting{Bar (inverse)} option) or a small arrow to the
       left of the menu text (\setting{Pointer} option).
     
-      \opt{HAVE_LCD_COLOR}{
+      \nopt{archos}{%
         \item[Clear Backdrop:]
-          Rockbox allows you to select bitmap pictures to use as backdrops.
-          These backdrops are set in the \setting{File Menu}, see
-          \reference{ref:Filemenu}.
+          Rockbox allows you to select bitmap pictures to use as backdrops,
+          see \reference{ref:LoadingBackdrops} for further information.
           This option allows you to clear the backdrops that you set.
+      }%
+      \opt{HAVE_LCD_COLOR}{
         \item[Set Background Colour:]
           Sets the background colour for the LCD display.
         \item[Set Foreground Colour:]