--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/program/lib/Roundcube/rcube_image.php	Thu Jan 04 15:52:31 2018 -0500
@@ -0,0 +1,460 @@
+<?php
+
+/**
+ +-----------------------------------------------------------------------+
+ | This file is part of the Roundcube Webmail client                     |
+ | Copyright (C) 2005-2012, The Roundcube Dev Team                       |
+ | Copyright (C) 2011-2012, Kolab Systems AG                             |
+ |                                                                       |
+ | Licensed under the GNU General Public License version 3 or            |
+ | any later version with exceptions for skins & plugins.                |
+ | See the README file for a full license statement.                     |
+ |                                                                       |
+ | PURPOSE:                                                              |
+ |   Image resizer and converter                                         |
+ +-----------------------------------------------------------------------+
+ | Author: Thomas Bruederli <roundcube@gmail.com>                        |
+ | Author: Aleksander Machniak <alec@alec.pl>                            |
+ +-----------------------------------------------------------------------+
+*/
+
+/**
+ * Image resizer and converter
+ *
+ * @package    Framework
+ * @subpackage Utils
+ */
+class rcube_image
+{
+    private $image_file;
+
+    const TYPE_GIF = 1;
+    const TYPE_JPG = 2;
+    const TYPE_PNG = 3;
+    const TYPE_TIF = 4;
+
+    public static $extensions = array(
+        self::TYPE_GIF => 'gif',
+        self::TYPE_JPG => 'jpg',
+        self::TYPE_PNG => 'png',
+        self::TYPE_TIF => 'tif',
+    );
+
+
+    /**
+     * Class constructor
+     *
+     * @param string $filename Image file name/path
+     */
+    function __construct($filename)
+    {
+        $this->image_file = $filename;
+    }
+
+    /**
+     * Get image properties.
+     *
+     * @return mixed Hash array with image props like type, width, height
+     */
+    public function props()
+    {
+        // use GD extension
+        if (function_exists('getimagesize') && ($imsize = @getimagesize($this->image_file))) {
+            $width   = $imsize[0];
+            $height  = $imsize[1];
+            $gd_type = $imsize[2];
+            $type    = image_type_to_extension($gd_type, false);
+            $channels = $imsize['channels'];
+        }
+
+        // use ImageMagick
+        if (!$type && ($data = $this->identify())) {
+            list($type, $width, $height) = $data;
+            $channels = null;
+        }
+
+        if ($type) {
+            return array(
+                'type'    => $type,
+                'gd_type' => $gd_type,
+                'width'   => $width,
+                'height'  => $height,
+                'channels' => $channels,
+            );
+        }
+
+        return null;
+    }
+
+    /**
+     * Resize image to a given size. Use only to shrink an image.
+     * If an image is smaller than specified size it will be not resized.
+     *
+     * @param int     $size           Max width/height size
+     * @param string  $filename       Output filename
+     * @param boolean $browser_compat Convert to image type displayable by any browser
+     *
+     * @return mixed Output type on success, False on failure
+     */
+    public function resize($size, $filename = null, $browser_compat = false)
+    {
+        $result  = false;
+        $rcube   = rcube::get_instance();
+        $convert = $rcube->config->get('im_convert_path', false);
+        $props   = $this->props();
+
+        if (empty($props)) {
+            return false;
+        }
+
+        if (!$filename) {
+            $filename = $this->image_file;
+        }
+
+        // use Imagemagick
+        if ($convert || class_exists('Imagick', false)) {
+            $p['out'] = $filename;
+            $p['in']  = $this->image_file;
+            $type     = $props['type'];
+
+            if (!$type && ($data = $this->identify())) {
+                $type = $data[0];
+            }
+
+            $type = strtr($type, array("jpeg" => "jpg", "tiff" => "tif", "ps" => "eps", "ept" => "eps"));
+            $p['intype'] = $type;
+
+            // convert to an image format every browser can display
+            if ($browser_compat && !in_array($type, array('jpg','gif','png'))) {
+                $type = 'jpg';
+            }
+
+            // If only one dimension is greater than the limit convert doesn't
+            // work as expected, we need to calculate new dimensions
+            $scale = $size / max($props['width'], $props['height']);
+
+            // if file is smaller than the limit, we do nothing
+            // but copy original file to destination file
+            if ($scale >= 1 && $p['intype'] == $type) {
+                $result = ($this->image_file == $filename || copy($this->image_file, $filename)) ? '' : false;
+            }
+            else {
+                $valid_types = "bmp,eps,gif,jp2,jpg,png,svg,tif";
+
+                if (in_array($type, explode(',', $valid_types))) { // Valid type?
+                    if ($scale >= 1) {
+                        $width  = $props['width'];
+                        $height = $props['height'];
+                    }
+                    else {
+                        $width  = intval($props['width']  * $scale);
+                        $height = intval($props['height'] * $scale);
+                    }
+
+                    // use ImageMagick in command line
+                    if ($convert) {
+                        $p += array(
+                            'type'    => $type,
+                            'quality' => 75,
+                            'size'    => $width . 'x' . $height,
+                        );
+
+                        $result = rcube::exec($convert . ' 2>&1 -flatten -auto-orient -colorspace sRGB -strip'
+                            . ' -quality {quality} -resize {size} {intype}:{in} {type}:{out}', $p);
+                    }
+                    // use PHP's Imagick class
+                    else {
+                        try {
+                            $image = new Imagick($this->image_file);
+
+                            try {
+                                // it throws exception on formats not supporting these features
+                                $image->setImageBackgroundColor('white');
+                                $image->setImageAlphaChannel(11);
+                                $image->mergeImageLayers(Imagick::LAYERMETHOD_FLATTEN);
+                            }
+                            catch (Exception $e) {
+                                // ignore errors
+                            }
+
+                            $image->setImageColorspace(Imagick::COLORSPACE_SRGB);
+                            $image->setImageCompressionQuality(75);
+                            $image->setImageFormat($type);
+                            $image->stripImage();
+                            $image->scaleImage($width, $height);
+
+                            if ($image->writeImage($filename)) {
+                                $result = '';
+                            }
+                        }
+                        catch (Exception $e) {
+                            rcube::raise_error($e, true, false);
+                        }
+                    }
+                }
+            }
+
+            if ($result === '') {
+                @chmod($filename, 0600);
+                return $type;
+            }
+        }
+
+        // do we have enough memory? (#1489937)
+        if (strtoupper(substr(PHP_OS, 0, 3)) == 'WIN' && !$this->mem_check($props)) {
+            return false;
+        }
+
+        // use GD extension
+        if ($props['gd_type']) {
+            if ($props['gd_type'] == IMAGETYPE_JPEG && function_exists('imagecreatefromjpeg')) {
+                $image = imagecreatefromjpeg($this->image_file);
+                $type  = 'jpg';
+            }
+            else if ($props['gd_type'] == IMAGETYPE_GIF && function_exists('imagecreatefromgif')) {
+                $image = imagecreatefromgif($this->image_file);
+                $type  = 'gif';
+            }
+            else if ($props['gd_type'] == IMAGETYPE_PNG && function_exists('imagecreatefrompng')) {
+                $image = imagecreatefrompng($this->image_file);
+                $type  = 'png';
+            }
+            else {
+                // @TODO: print error to the log?
+                return false;
+            }
+
+            if ($image === false) {
+                return false;
+            }
+
+            $scale = $size / max($props['width'], $props['height']);
+
+            // Imagemagick resize is implemented in shrinking mode (see -resize argument above)
+            // we do the same here, if an image is smaller than specified size
+            // we do nothing but copy original file to destination file
+            if ($scale >= 1) {
+                $result = $this->image_file == $filename || copy($this->image_file, $filename);
+            }
+            else {
+                $width     = intval($props['width']  * $scale);
+                $height    = intval($props['height'] * $scale);
+                $new_image = imagecreatetruecolor($width, $height);
+
+                if ($new_image === false) {
+                    return false;
+                }
+
+                // Fix transparency of gif/png image
+                if ($props['gd_type'] != IMAGETYPE_JPEG) {
+                    imagealphablending($new_image, false);
+                    imagesavealpha($new_image, true);
+                    $transparent = imagecolorallocatealpha($new_image, 255, 255, 255, 127);
+                    imagefilledrectangle($new_image, 0, 0, $width, $height, $transparent);
+                }
+
+                imagecopyresampled($new_image, $image, 0, 0, 0, 0, $width, $height, $props['width'], $props['height']);
+                $image = $new_image;
+
+                // fix rotation of image if EXIF data exists and specifies rotation (GD strips the EXIF data)
+                if ($this->image_file && $type == 'jpg' && function_exists('exif_read_data')) {
+                    $exif = exif_read_data($this->image_file);
+                    if ($exif && $exif['Orientation']) {
+                        switch ($exif['Orientation']) {
+                            case 3:
+                                $image = imagerotate($image, 180, 0);
+                                break;
+                            case 6:
+                                $image = imagerotate($image, -90, 0);
+                                break;
+                            case 8:
+                                $image = imagerotate($image, 90, 0);
+                                break;
+                        }
+                    }
+                }
+
+                if ($props['gd_type'] == IMAGETYPE_JPEG) {
+                    $result = imagejpeg($image, $filename, 75);
+                }
+                elseif($props['gd_type'] == IMAGETYPE_GIF) {
+                    $result = imagegif($image, $filename);
+                }
+                elseif($props['gd_type'] == IMAGETYPE_PNG) {
+                    $result = imagepng($image, $filename, 6, PNG_ALL_FILTERS);
+                }
+            }
+
+            if ($result) {
+                @chmod($filename, 0600);
+                return $type;
+            }
+        }
+
+        // @TODO: print error to the log?
+        return false;
+    }
+
+    /**
+     * Convert image to a given type
+     *
+     * @param int    $type     Destination file type (see class constants)
+     * @param string $filename Output filename (if empty, original file will be used
+     *                         and filename extension will be modified)
+     *
+     * @return bool True on success, False on failure
+     */
+    public function convert($type, $filename = null)
+    {
+        $rcube   = rcube::get_instance();
+        $convert = $rcube->config->get('im_convert_path', false);
+
+        if (!$filename) {
+            $filename = $this->image_file;
+
+            // modify extension
+            if ($extension = self::$extensions[$type]) {
+                $filename = preg_replace('/\.[^.]+$/', '', $filename) . '.' . $extension;
+            }
+        }
+
+        // use ImageMagick in command line
+        if ($convert) {
+            $p['in']   = $this->image_file;
+            $p['out']  = $filename;
+            $p['type'] = self::$extensions[$type];
+
+            $result = rcube::exec($convert . ' 2>&1 -colorspace sRGB -strip -quality 75 {in} {type}:{out}', $p);
+
+            if ($result === '') {
+                chmod($filename, 0600);
+                return true;
+            }
+        }
+
+        // use PHP's Imagick class
+        if (class_exists('Imagick', false)) {
+            try {
+                $image = new Imagick($this->image_file);
+
+                $image->setImageColorspace(Imagick::COLORSPACE_SRGB);
+                $image->setImageCompressionQuality(75);
+                $image->setImageFormat(self::$extensions[$type]);
+                $image->stripImage();
+
+                if ($image->writeImage($filename)) {
+                    @chmod($filename, 0600);
+                    return true;
+                }
+            }
+            catch (Exception $e) {
+                rcube::raise_error($e, true, false);
+            }
+        }
+
+        // use GD extension (TIFF isn't supported)
+        $props = $this->props();
+
+        // do we have enough memory? (#1489937)
+        if (strtoupper(substr(PHP_OS, 0, 3)) == 'WIN' && !$this->mem_check($props)) {
+            return false;
+        }
+
+        if ($props['gd_type']) {
+            if ($props['gd_type'] == IMAGETYPE_JPEG && function_exists('imagecreatefromjpeg')) {
+                $image = imagecreatefromjpeg($this->image_file);
+            }
+            else if ($props['gd_type'] == IMAGETYPE_GIF && function_exists('imagecreatefromgif')) {
+                $image = imagecreatefromgif($this->image_file);
+            }
+            else if ($props['gd_type'] == IMAGETYPE_PNG && function_exists('imagecreatefrompng')) {
+                $image = imagecreatefrompng($this->image_file);
+            }
+            else {
+                // @TODO: print error to the log?
+                return false;
+            }
+
+            if ($type == self::TYPE_JPG) {
+                $result = imagejpeg($image, $filename, 75);
+            }
+            else if ($type == self::TYPE_GIF) {
+                $result = imagegif($image, $filename);
+            }
+            else if ($type == self::TYPE_PNG) {
+                $result = imagepng($image, $filename, 6, PNG_ALL_FILTERS);
+            }
+
+            if ($result) {
+                @chmod($filename, 0600);
+                return true;
+            }
+        }
+
+        // @TODO: print error to the log?
+        return false;
+    }
+
+    /**
+     * Checks if image format conversion is supported
+     *
+     * @return boolean True if specified format can be converted to another format
+     */
+    public static function is_convertable($mimetype = null)
+    {
+        $rcube = rcube::get_instance();
+
+        // @TODO: check if specified mimetype is really supported
+        return class_exists('Imagick', false) || $rcube->config->get('im_convert_path');
+    }
+
+    /**
+     * ImageMagick based image properties read.
+     */
+    private function identify()
+    {
+        $rcube = rcube::get_instance();
+
+        // use ImageMagick in command line
+        if ($cmd = $rcube->config->get('im_identify_path')) {
+            $args = array('in' => $this->image_file, 'format' => "%m %[fx:w] %[fx:h]");
+            $id   = rcube::exec($cmd. ' 2>/dev/null -format {format} {in}', $args);
+
+            if ($id) {
+                return explode(' ', strtolower($id));
+            }
+        }
+
+        // use PHP's Imagick class
+        if (class_exists('Imagick', false)) {
+            try {
+                $image = new Imagick($this->image_file);
+
+                return array(
+                    strtolower($image->getImageFormat()),
+                    $image->getImageWidth(),
+                    $image->getImageHeight(),
+                );
+            }
+            catch (Exception $e) {}
+        }
+    }
+
+    /**
+     * Check if we have enough memory to load specified image
+     */
+    private function mem_check($props)
+    {
+        // image size is unknown, we can't calculate required memory
+        if (!$props['width']) {
+            return true;
+        }
+
+        // channels: CMYK - 4, RGB - 3
+        $multip = ($props['channels'] ?: 3) + 1;
+
+        // calculate image size in memory (in bytes)
+        $size = $props['width'] * $props['height'] * $multip;
+        return rcube_utils::mem_check($size);
+    }
+}