To change the background color of the popup fullsize image you need to copy the following code from the sample theme.php and paste it into your theme.php then change the sytling.
Copy from Sample theme.php and paste into your theme.php:
// Display the full size image
function theme_display_fullsize_pic()
{
global $CONFIG, $THEME_DIR, $ALBUM_SET;
global $lang_errors, $lang_fullsize_popup, $lang_charset;
if (isset($_GET['picfile']))
{
if (!GALLERY_ADMIN_MODE) cpg_die(ERROR, $lang_errors['access_denied'], __FILE__, __LINE__);
$picfile = $_GET['picfile'];
$picname = $CONFIG['fullpath'] . $picfile;
$imagesize = @getimagesize($picname);
$imagedata = array('name' => $picfile, 'path' => path2url($picname), 'geometry' => $imagesize[3]);
}
elseif (isset($_GET['pid']))
{
$pid = (int)$_GET['pid'];
$sql = "SELECT * " . "FROM {$CONFIG['TABLE_PICTURES']} " . "WHERE pid='$pid' $ALBUM_SET";
$result = cpg_db_query($sql);
if (!mysql_num_rows($result)) cpg_die(ERROR, $lang_errors['non_exist_ap'], __FILE__, __LINE__);
$row = mysql_fetch_array($result);
$pic_url = get_pic_url($row, 'fullsize');
$geom = 'width="' . $row['pwidth'] . '" height="' . $row['pheight'] . '"';
$imagedata = array('name' => $row['filename'], 'path' => $pic_url, 'geometry' => $geom);
}
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=<?php echo $CONFIG['charset'] == 'language file' ? $lang_charset : $CONFIG['charset'] ?>" />
<title><?php echo $CONFIG['gallery_name'] ?>: <?php echo $lang_fullsize_popup['click_to_close'];
?></title>
<script type="text/javascript" src="scripts.js"></script>
<style type="text/css">
body { margin: 0; padding: 0; background-color: gray; }
img { margin:0; padding:0; border:0; }
#content { margin:0 auto; padding:0; border:0; }
table { border:0; height:100%; width:100%; border-collapse:collapse}
td { vertical-align: middle; text-align:center; }
</style>
</head>
<body>
<script language="JavaScript" type="text/JavaScript">
adjust_popup();
</script>
<table>
<tr>
<td>
<div id="content">
<?php echo '<a href="javascript: window.close()"><img src="'
. htmlspecialchars($imagedata['path']) . '" '
. $imagedata['geometry']
. 'alt="'
. htmlspecialchars($imagedata['name'])
. '" title="'
. htmlspecialchars($imagedata['name'])
. "\n" . $lang_fullsize_popup['click_to_close']
. '" /></a><br />' ."\n";
?>
</div>
</td>
</tr>
</table>
</body>
</html>
<?php
}
Locate and edit the background color to suit your needs.
body { margin: 0; padding: 0; background-color: gray; }
For instance, if you want it black, change "gray" to "black" or use the hexadecimal code.
body { margin: 0; padding: 0; background-color: black; }or
body { margin: 0; padding: 0; background-color: #000000; }