+Also, the following files, if placed in the images directory, will be used to
+generate part of the index page:
+ description.txt - a simple text file containing paragraphs to go at the
+ beginnings of the index page
+ captions.txt - filename<tab>caption style file, it'll add a caption to
+ the images on the index page.
+The following environment variables can also be used:
+ TITLE - the title of the gallery
+ WIDTH - the width to make the icons
+ BPGALLERY_THEME - set the theme to use (described below)
+ BPGALLERY_THEME_DIR - set an extra location to look for themes
+ OUTPUTHTML - sets the script output to be wrapped in a <pre> block
+
+Example Usage:
+ TITLE="My Funky Gallery" bpgallery.sh /path/to/image/files
+
+Themes
+------
+Theme support is very rudimentary, basically you create functions for each of
+the parts of the template, and put them in a file named the same as the theme.
+The functions that you need to declare are as follows:
+ bpgallery_ThemeName_head()
+ what's it for?:
+ This sets up the header for the page, generally
+ everything until the first picture. So, the title bar
+ and any menus you would like to use
+ available variables:
+ $TITLE - the title for the index page
+ bpgallery_ThemeName_tail()
+ what's it for?:
+ Closes the page, is the last thing to be printed.
+ available variables:
+ None
+ bpgallery_ThemeName_description()
+ what's it for?:
+ if there's a description set up (i.e. a description.txt
+ file) then this is what it'll be wrapped in. It comes
+ just after the _head.
+ available variables:
+ $DESCRIPTION - the content of description.txt
+ bpgallery_ThemeName_stylesheet()
+ what's if for?:
+ It generates the stylesheet for the page.
+ available variables:
+ $WIDTH - the width of the images
+ $MAXHEIGHT - the maximum height of the image
+ bpgallery_ThemeName_thumbsline()
+ what's it for?:
+ Whatever is in here is generated per thumbnail.
+ available variables:
+ $filename - the name of the file
+ $caption - the caption as got from captions.txt
+
+If any of the functions are not defined in a theme then the default theme
+function will be used instead. The default theme is clean and simplistic, this
+is deliberate!