<?php
/**
* Smarty plugin
* @package Smarty
* @subpackage plugins
* @author Andreas Goetz <hide@address.com>
*/
require_once('./lib/phpthumb/phpthumb.class.php');
/**
* Smarty {html_image} function plugin
*
* Type: function<br>
* Name: html_image<br>
* Date: Feb 24, 2003<br>
* Purpose: format HTML tags for the image<br>
* Input:<br>
* - file = file (and path) of image (required)
* - border = border width (optional, default 0)
* - height = image height (optional, default actual height)
* - image =image width (optional, default actual width)
* - basedir = base directory for absolute paths, default
* is environment variable DOCUMENT_ROOT
*
* Examples: {html_image file="images/masthead.gif"}
* Output: <img src="images/masthead.gif" border=0 width=400 height=23>
* @link http://smarty.php.net/manual/en/language.function.html.image.php {html_image}
* (Smarty online manual)
* @author Monte Ohrt <hide@address.com>
* @author credits to Duda <hide@address.com> - wrote first image function
* in repository, helped with lots of functionality
* @version 1.0
* @param array
* @param Smarty
* @return string
* @uses smarty_function_escape_special_chars()
*/
define(THUMB_CACHE_SOURCE, true);
define(THUMB_CACHE_TARGET, true);
function html_image_get_cache($tag, &$width, &$height)
{
$res = runSQL("SELECT * FROM ".TBL_CACHE." WHERE tag='".mysql_escape_string($tag)."'");
if (count($res))
{
if (preg_match('/(\d+)x(\d+)/', $res[0]['value'], $m))
{
list($foo, $width, $height) = $m;
return true;
}
}
return false;
}
function html_image_put_cache($tag, $value)
{
$res = runSQL("REPLACE INTO ".TBL_CACHE." SET tag='".mysql_escape_string($tag)."', value='".mysql_escape_string($value)."'");
}
/**
* Thumbnail generation
*/
function generate_thumbnail(&$file, &$width, &$height, $max_width, $max_height, $cache_tag)
{
global $config;
$thumb_cache_tag = $cache_tag.'_'.$max_width.'x'.$max_height;
// the names of the existing or to-be created thumbnail- still missing dimensions
$thumb_name = './cache/'.CACHE_THUMBS.'/'.
(($config['hierarchical']) ? substr($cache_tag, 0, 1).'/' : '').
$cache_tag;
// did we already create this thumbnail?
if (THUMB_CACHE_TARGET && html_image_get_cache($thumb_cache_tag, $width, $height))
{
// get updated filename
$file = $thumb_name.'_'.$width.'x'.$height.'.jpg';
return;
}
// thumbnail not created yet
$scale = min($max_width/$width, $max_height/$height);
$width = round($width * $scale);
$height = round($height * $scale);
// really need to scale?
$thumb_must_scale = (($config['thumbnail_level'] == TUMB_SCALE) ||
($config['thumbnail_level'] == TUMB_REDUCE_ONLY && ($scale < 1)) ||
($config['thumbnail_level'] > 1) && ($config['thumbnail_level'] < @filesize($file)));
#dump("scaling required: ".(int)$thumb_must_scale." filesize: "hide@address.com($file));
// perform actual scaling
if ($thumb_must_scale)
{
$phpThumb = new phpThumb();
$phpThumb->sourceFilename = $file;
$phpThumb->w = $max_width;
$phpThumb->h = $max_height;
if ($config['thumbnail_quality']) $phpThumb->q = $config['thumbnail_quality'];
// set cache filename
$thumb_name .= '_'.$width.'x'.$height.'.jpg';
#dump("thumbname:$thumb_name");
// check to see if file already exists in cache, and output it with no processing if it does
if (is_writable(dirname($thumb_name)) || is_writable($thumb_name))
{
if (@filesize($thumb_name) ||
($phpThumb->GenerateThumbnail() && $phpThumb->RenderOutput() &&
file_put_contents($thumb_name, $phpThumb->outputImageData)))
{
$file = $thumb_name;
if (THUMB_CACHE_TARGET) html_image_put_cache($thumb_cache_tag, $width.'x'.$height);
}
}
// free memory
$phpThumb = null;
}
}
function smarty_function_html_image($params, &$smarty)
{
global $config;
require_once $smarty->_get_plugin_filepath('shared','escape_special_chars');
$alt = '';
$file = '';
$border = 0;
$height = '';
$width = '';
$extra = '';
$prefix = '';
$suffix = '';
$server_vars = ($smarty->request_use_auto_globals) ? $_SERVER : $GLOBALS['HTTP_SERVER_VARS'];
$basedir = isset($server_vars['DOCUMENT_ROOT']) ? $server_vars['DOCUMENT_ROOT'] : '';
foreach($params as $_key => $_val) {
switch($_key) {
case 'file':
case 'border':
case 'height':
case 'width':
case 'dpi':
case 'basedir':
case 'max_width':
case 'max_height':
$$_key = $_val;
break;
case 'alt':
if(!is_array($_val)) {
$$_key = smarty_function_escape_special_chars($_val);
} else {
$smarty->trigger_error("html_image: extra attribute '$_key' cannot be an array", E_USER_NOTICE);
}
break;
case 'link':
case 'href':
// hide@address.com suppress hrefs without link
if (!empty($_val)) {
$prefix = '<a href="' . $_val . '">';
$suffix = '</a>';
}
break;
default:
if(!is_array($_val)) {
$extra .= ' '.$_key.'="'.smarty_function_escape_special_chars($_val).'"';
} else {
$smarty->trigger_error("html_image: extra attribute '$_key' cannot be an array", E_USER_NOTICE);
}
break;
}
}
if (empty($file)) {
$smarty->trigger_error("html_image: missing 'file' parameter", E_USER_NOTICE);
return;
}
$_image_path = (substr($file,0,1) == '/') ? $basedir.$file : $file;
if(!isset($params['width']) || !isset($params['height'])) {
if ($smarty->security &&
($_params = array('resource_type' => 'file', 'resource_name' => $_image_path)) &&
(require_once(SMARTY_DIR . 'core' . DIRECTORY_SEPARATOR . 'core.is_secure.php')) &&
(!smarty_core_is_secure($_params, $smarty)) ) {
$smarty->trigger_error("html_image: (secure) '$_image_path' not in secure directory", E_USER_NOTICE);
}
// hide@address.com checking for non-local images
elseif (preg_match("/nocover|^(http:|img\.php)/", $_image_path))
{
$no_scaling = true;
}
else
{
// do we already know this image?
$cache_tag = md5($_image_path);
if (!(THUMB_CACHE_SOURCE && html_image_get_cache($cache_tag, $width, $height)))
{
if ($_image_data = @getimagesize($_image_path)) {
if (!isset($params['width'])) $width = $_image_data[0];
if (!isset($params['height'])) $height = $_image_data[1];
if (THUMB_CACHE_SOURCE) html_image_put_cache($cache_tag, $width.'x'.$height);
#dump("cache commit: $width $height");
}
else {
if(!file_exists($_image_path)) {
$smarty->trigger_error("html_image: unable to find '$_image_path'", E_USER_NOTICE);
return;
} else if(!is_readable($_image_path)) {
$smarty->trigger_error("html_image: unable to read '$_image_path'", E_USER_NOTICE);
return;
} else {
$smarty->trigger_error("html_image: '$_image_path' is not a valid image file", E_USER_NOTICE);
return;
}
}
}
}
if (empty($width)) $width = $max_width;
if (empty($height)) $height = $max_height;
/*
* Scaling is required if:
* - scale mode TUMB_SCALE
* - scale mode TUMB_REDUCE_ONLY and dimensions > target dimensions
* - scale mode is any other numeric and filesize > scale mode
*/
if ($max_width && $max_height && !$no_scaling)
{
// even if thumbnails are not generated we should get aspect ratio right
if ($config['thumbnail_level'] == TUMB_NO_SCALE)
{
$scale = min($max_width/$width, $max_height/$height);
$width = round($width * $scale);
$height = round($height * $scale);
}
else
{
generate_thumbnail($file, $width, $height, $max_width, $max_height, $cache_tag);
}
}
}
if(isset($params['dpi']))
{
if(strstr($server_vars['HTTP_USER_AGENT'], 'Mac')) {
$dpi_default = 72;
} else {
$dpi_default = 96;
}
$_resize = $dpi_default/$params['dpi'];
$width = round($width * $_resize);
$height = round($height * $_resize);
}
$result = $prefix . '<img src="'.$file.'" alt="'.$alt;
if (isset($border)) $result .= '" border="'.$border;
if ($width) $result .= '" width="'.$width;
if ($height) $result .= '" height="'.$height;
$result .= '"'.$extra.' />' . $suffix;
return $result;
}
/* vim: set expandtab: */
?>