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<?php
# Movable Type (r) Open Source (C) 2001-2008 Six Apart, Ltd.
# This program is distributed under the terms of the
# GNU General Public License, version 2.
#
# $Id: thumbnail_lib.php 3038 2008-09-08 07:20:37Z takayama $
class Thumbnail {
var $src_file;
var $src_w;
var $src_h;
var $src_type;
# construct
function Thumbnail ($src) {
$this->src_file = $src;
}
# Can we use function of GD?
function is_available () {
return extension_loaded('gd');
}
# Calculate image size
# This function returns array object.
# [0] thumbnail width
# [1] thumbnail height
# [2] thumbnail width for file name
# [3] thumbnail width for file name
function _calculate_size ($width, $height, $scale) {
# Calculate thumbnail size
$thumb_w = $this->src_w;
$thumb_h = $this->src_h;
$thumb_w_name = $this->src_w;
$thumb_h_name = $this->src_h;
if ($scale > 0) {
$thumb_w = $this->src_w * $scale / 100;
$thumb_h = $this->src_h * $scale / 100;
$thumb_w_name = $thumb_w;
$thumb_h_name = $thumb_h;
} elseif ($width > 0 || $height > 0) {
$thumb_w_name = 'auto';
$thumb_h_name = 'auto';
$x = $width; if ($width > 0) $thumb_w;
$y = $height; if ($height > 0) $thumb_h;
$pct = $width > 0 ? ($x / $thumb_w) : ($y / $thumb_h);
$thumb_w = (int)($thumb_w * $pct);
$thumb_h = (int)($thumb_h * $pct);
if ($width > 0) $thumb_w_name = $width;
if ($height > 0) $thumb_h_name = $height;
}
return array($thumb_w, $thumb_h, $thumb_w_name, $thumb_h_name);
}
function _make_dest_name ($w, $h, $format, $dest_type, $id) {
$output = $this->src_type;
if ($dest_type != 'auto') {
$output = strtolower($dest_type) == 'gif' ? 1
: strtolower($dest_type) == 'jpeg' ? 2
: strtolower($dest_type) == 'png' ? 3
: $src_type;
}
switch($output) {
case 1: #GIF
$ext = '.gif';
break;
case 2: #JPEG
$ext = '.jpg';
break;
case 3: #PNG
$ext = '.png';
break;
}
$pathinfo = pathinfo($this->src_file);
$basename = basename($pathinfo['basename'], '.'.$pathinfo['extension']);
$patterns[0] = '/%w/';
$patterns[1] = '/%h/';
$patterns[2] = '/%f/';
$patterns[3] = '/%i/';
$patterns[4] = '/%x/';
$replacement[0] = $w;
$replacement[1] = $h;
$replacement[2] = $basename;
$replacement[3] = $id;
$replacement[4] = $ext;
return preg_replace($patterns, $replacement, $format);
}
# Load or generate a thumbnail.
function get_thumbnail (&$dest, &$width, &$height, $id, $scale = 0, $format = '%f-thumb-%wx%h-%i%x', $dest_type = 'auto') {
if (empty($this->src_file)) return false;
if (!file_exists($this->src_file)) return false;
if (!$this->is_available()) {
global $mt;
$mt->warning_log($mt->translate('GD support has not been available. Please install GD support.'));
return false;
}
# Get source image information
list($this->src_w, $this->src_h, $this->src_type, $src_attr) = getimagesize($this->src_file);
# Load source image
$src_img;
switch($this->src_type) {
case 1: #GIF
$src_img = @imagecreatefromgif($this->src_file);
break;
case 2: #JPEG
$src_img = @imagecreatefromjpeg($this->src_file);
break;
case 3: #PNG
$src_img = @imagecreatefrompng($this->src_file);
break;
default: #Unsupported format
return false;
}
if (empty($src_img)) {
return false;
}
# Calculate thumbnail size
list ($thumb_w, $thumb_h, $thumb_w_name, $thumb_h_name) = $this->_calculate_size($width, $height, $scale);
$width = $thumb_w;
$height = $thumb_h;
# Decide a destination file name
if (empty($dest)) {
$dest = $this->_make_dest_name($thumb_w_name, $thumb_h_name, $format, $dest_type, $id);
}
# Generate
if(!file_exists($dest)) {
$dir_name = dirname($dest);
if (!file_exists($dir_name))
mkpath($dir_name, 0777);
if (!is_writable($dir_name)) {
imagedestroy($src_img);
return false;
}
# Create thumbnail
$dst_img = imagecreatetruecolor ( $thumb_w, $thumb_h );
$result = imagecopyresampled ( $dst_img, $src_img, 0, 0, 0, 0,
$thumb_w, $thumb_h, $this->src_w, $this->src_h);
$output = $this->src_type;
if ($dest_type != 'auto') {
$output = strtolower($dest_type) == 'gif' ? 1
: strtolower($dest_type) == 'jpeg' ? 2
: strtolower($dest_type) == 'png' ? 3
: $src_type;
}
switch($output) {
case 1: #GIF
imagegif($dst_img, $dest);
break;
case 2: #JPEG
imagejpeg($dst_img, $dest);
break;
case 3: #PNG
imagepng($dst_img, $dest);
break;
}
imagedestroy($dst_img);
}
imagedestroy($src_img);
return true;
}
}
?>
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