Support image operations with Imagick extension (#1489734)

CHANGELOG

@@ -1,6 +1,7 @@
 CHANGELOG Roundcube Webmail
 ===========================
 
+- Support image operations with Imagick extension (#1489734)
 - Support upload progress with session.upload_progress and PECL uploadprogress module (#1488702)
 - Make identity name field optional (#1489510)
 - Utility script to remove user records from the local database

program/lib/Roundcube/rcube_image.php

@@ -102,7 +102,7 @@ class rcube_image
         }
 
         // use Imagemagick
-        if ($convert) {
+        if ($convert || class_exists('Imagick', false)) {
             $p['out'] = $filename;
             $p['in']  = $this->image_file;
             $type     = $props['type'];
@@ -129,6 +129,9 @@ class rcube_image
                 $result = ($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'];
@@ -138,18 +141,38 @@ class rcube_image
                         $height = intval($props['height'] * $scale);
                     }
 
-                $valid_types = "bmp,eps,gif,jp2,jpg,png,svg,tif";
-
+                    // use ImageMagick in command line
+                    if ($convert) {
                         $p += array(
                             'type'    => $type,
                             'quality' => 75,
                             'size'    => $width . 'x' . $height,
                         );
 
-                if (in_array($type, explode(',', $valid_types))) { // Valid type?
                         $result = rcube::exec($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);
+                            $image = $image->flattenImages();
+
+                            $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 === '') {
@@ -249,7 +272,7 @@ class rcube_image
             }
         }
 
-        // use ImageMagick
+        // use ImageMagick in command line
         if ($convert) {
             $p['in']   = $this->image_file;
             $p['out']  = $filename;
@@ -258,10 +281,30 @@ class rcube_image
             $result = rcube::exec($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();
@@ -302,12 +345,26 @@ class rcube_image
     }
 
     /**
-     * Identify command handler.
+     * 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}', $args);
@@ -316,6 +373,19 @@ class rcube_image
                 return explode(' ', strtolower($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) {}
+        }
+    }
 }

program/steps/mail/func.inc

@@ -1343,12 +1343,10 @@ function rcmail_message_body($attrib)
 
 function rcmail_part_image_type($part)
 {
-    $rcmail = rcmail::get_instance();
-
     // Skip TIFF images if browser doesn't support this format...
     $tiff_support = !empty($_SESSION['browser_caps']) && !empty($_SESSION['browser_caps']['tif']);
     // until we can convert them to JPEG
-    $tiff_support = $tiff_support || $rcmail->config->get('im_convert_path');
+    $tiff_support = $tiff_support || rcube_image::is_convertable('image/tiff');
 
     // Content-type regexp
     $mime_regex = $tiff_support ? '/^image\//i' : '/^image\/(?!tif)/i';

program/steps/mail/get.inc

@@ -221,7 +221,7 @@ else if (strlen($part_id)) {
         // TIFF to JPEG conversion, if needed
         $tiff_support = !empty($_SESSION['browser_caps']) && !empty($_SESSION['browser_caps']['tif']);
         if (!empty($_REQUEST['_embed']) && !$tiff_support
-            && $RCMAIL->config->get('im_convert_path')
+            && rcube_image::is_convertable('image/tiff')
             && rcmail_part_image_type($part) == 'image/tiff'
         ) {
             $tiff2jpeg = true;

program/steps/mail/show.inc

@@ -102,7 +102,7 @@ if ($uid) {
     }
     if (empty($_SESSION['browser_caps']['tif']) && ($key = array_search('image/tiff', $mimetypes)) !== false) {
         // we can convert tiff to jpeg
-        if (!$RCMAIL->config->get('im_convert_path')) {
+        if (!rcube_image::is_convertable('image/tiff')) {
             unset($mimetypes[$key]);
         }
     }