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269 lines
9.1 KiB
PHP
269 lines
9.1 KiB
PHP
<?php
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/*
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+-----------------------------------------------------------------------+
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| program/include/rcube_image.php |
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| This file is part of the Roundcube Webmail client |
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| Copyright (C) 2005-2012, The Roundcube Dev Team |
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| Copyright (C) 2011-2012, Kolab Systems AG |
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| Licensed under the GNU General Public License version 3 or |
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| any later version with exceptions for skins & plugins. |
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| See the README file for a full license statement. |
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| PURPOSE: |
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| Image resizer and converter |
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+-----------------------------------------------------------------------+
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| Author: Thomas Bruederli <roundcube@gmail.com> |
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| Author: Aleksander Machniak <alec@alec.pl> |
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+-----------------------------------------------------------------------+
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*/
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/**
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* Image resizer and converter
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*
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* @package Framework
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* @subpackage Utils
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*/
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class rcube_image
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{
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private $image_file;
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const TYPE_GIF = 1;
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const TYPE_JPG = 2;
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const TYPE_PNG = 3;
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const TYPE_TIF = 4;
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public static $extensions = array(
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self::TYPE_GIF => 'gif',
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self::TYPE_JPG => 'jpg',
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self::TYPE_PNG => 'png',
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self::TYPE_TIF => 'tif',
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);
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function __construct($filename)
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{
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$this->image_file = $filename;
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}
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/**
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* Get image properties.
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*
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* @return mixed Hash array with image props like type, width, height
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*/
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public function props()
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{
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// use GD extension
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if (function_exists('getimagesize') && ($imsize = @getimagesize($this->image_file))) {
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$width = $imsize[0];
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$height = $imsize[1];
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$gd_type = $imsize['2'];
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$type = image_type_to_extension($imsize['2'], false);
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}
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// use ImageMagick
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if (!$type && ($data = $this->identify())) {
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list($type, $width, $height) = $data;
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}
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if ($type) {
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return array(
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'type' => $type,
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'gd_type' => $gd_type,
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'width' => $width,
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'height' => $height,
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);
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}
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}
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/**
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* Resize image to a given size
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*
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* @param int $size Max width/height size
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* @param string $filename Output filename
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* @param boolean $browser_compat Convert to image type displayable by any browser
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*
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* @return mixed Output type on success, False on failure
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*/
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public function resize($size, $filename = null, $browser_compat = false)
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{
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$result = false;
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$rcube = rcube::get_instance();
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$convert = $rcube->config->get('im_convert_path', false);
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$props = $this->props();
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if (!$filename) {
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$filename = $this->image_file;
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}
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// use Imagemagick
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if ($convert) {
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$p['out'] = $filename;
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$p['in'] = $this->image_file;
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$p['size'] = $size.'x'.$size;
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$type = $props['type'];
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if (!$type && ($data = $this->identify())) {
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$type = $data[0];
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}
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$type = strtr($type, array("jpeg" => "jpg", "tiff" => "tif", "ps" => "eps", "ept" => "eps"));
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$p['intype'] = $type;
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// convert to an image format every browser can display
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if ($browser_compat && !in_array($type, array('jpg','gif','png'))) {
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$type = 'jpg';
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}
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$p += array('type' => $type, 'types' => "bmp,eps,gif,jp2,jpg,png,svg,tif", 'quality' => 75);
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$p['-opts'] = array('-resize' => $p['size'].'>');
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if (in_array($type, explode(',', $p['types']))) { // Valid type?
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$result = rcube::exec($convert . ' 2>&1 -flatten -auto-orient -colorspace RGB -quality {quality} {-opts} {intype}:{in} {type}:{out}', $p);
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}
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if ($result === '') {
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return $type;
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}
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}
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// use GD extension
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$gd_types = array(IMAGETYPE_JPEG, IMAGETYPE_GIF, IMAGETYPE_PNG);
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if ($props['gd_type'] && in_array($props['gd_type'], $gd_types)) {
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if ($props['gd_type'] == IMAGETYPE_JPEG) {
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$image = imagecreatefromjpeg($this->image_file);
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}
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elseif($props['gd_type'] == IMAGETYPE_GIF) {
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$image = imagecreatefromgif($this->image_file);
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}
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elseif($props['gd_type'] == IMAGETYPE_PNG) {
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$image = imagecreatefrompng($this->image_file);
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}
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$scale = $size / max($props['width'], $props['height']);
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$width = $props['width'] * $scale;
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$height = $props['height'] * $scale;
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$new_image = imagecreatetruecolor($width, $height);
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// Fix transparency of gif/png image
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if ($props['gd_type'] != IMAGETYPE_JPEG) {
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imagealphablending($new_image, false);
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imagesavealpha($new_image, true);
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$transparent = imagecolorallocatealpha($new_image, 255, 255, 255, 127);
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imagefilledrectangle($new_image, 0, 0, $width, $height, $transparent);
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}
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imagecopyresampled($new_image, $image, 0, 0, 0, 0, $width, $height, $props['width'], $props['height']);
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$image = $new_image;
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if ($props['gd_type'] == IMAGETYPE_JPEG) {
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$result = imagejpeg($image, $filename, 75);
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$type = 'jpg';
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}
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elseif($props['gd_type'] == IMAGETYPE_GIF) {
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$result = imagegif($image, $filename);
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$type = 'gid';
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}
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elseif($props['gd_type'] == IMAGETYPE_PNG) {
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$result = imagepng($image, $filename, 6, PNG_ALL_FILTERS);
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$type = 'png';
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}
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if ($result) {
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return $type;
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}
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}
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// @TODO: print error to the log?
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return false;
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}
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/**
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* Convert image to a given type
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*
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* @param int $type Destination file type (see class constants)
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* @param string $filename Output filename (if empty, original file will be used
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* and filename extension will be modified)
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*
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* @return bool True on success, False on failure
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*/
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public function convert($type, $filename = null)
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{
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$rcube = rcube::get_instance();
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$convert = $rcube->config->get('im_convert_path', false);
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if (!$filename) {
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$filename = $this->image_file;
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// modify extension
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if ($extension = self::$extensions[$type]) {
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$filename = preg_replace('/\.[^.]+$/', '', $filename) . '.' . $extension;
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}
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}
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// use ImageMagick
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if ($convert) {
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$p['in'] = $this->image_file;
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$p['out'] = $filename;
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$p['type'] = self::$extensions[$type];
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$result = rcube::exec($convert . ' 2>&1 -colorspace RGB -quality 75 {in} {type}:{out}', $p);
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if ($result === '') {
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return true;
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}
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}
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// use GD extension (TIFF isn't supported)
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$props = $this->props();
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$gd_types = array(IMAGETYPE_JPEG, IMAGETYPE_GIF, IMAGETYPE_PNG);
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if ($props['gd_type'] && in_array($props['gd_type'], $gd_types)) {
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if ($props['gd_type'] == IMAGETYPE_JPEG) {
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$image = imagecreatefromjpeg($this->image_file);
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}
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else if ($props['gd_type'] == IMAGETYPE_GIF) {
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$image = imagecreatefromgif($this->image_file);
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}
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else if ($props['gd_type'] == IMAGETYPE_PNG) {
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$image = imagecreatefrompng($this->image_file);
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}
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if ($type == self::TYPE_JPG) {
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$result = imagejpeg($image, $filename, 75);
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}
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else if ($type == self::TYPE_GIF) {
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$result = imagegif($image, $filename);
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}
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else if ($type == self::TYPE_PNG) {
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$result = imagepng($image, $filename, 6, PNG_ALL_FILTERS);
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}
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}
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// @TODO: print error to the log?
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return false;
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}
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/**
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* Identify command handler.
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*/
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private function identify()
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{
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$rcube = rcube::get_instance();
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if ($cmd = $rcube->config->get('im_identify_path')) {
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$args = array('in' => $this->image_file, 'format' => "%m %[fx:w] %[fx:h]");
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$id = rcube::exec($cmd. ' 2>/dev/null -format {format} {in}', $args);
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if ($id) {
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return explode(' ', strtolower($id));
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}
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}
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}
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}
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