From 379da044559ed88f0da0eaf0fa9c02e85a7e9041 Mon Sep 17 00:00:00 2001
From: Adam Prager <prager.adam87@gmail.com>
Date: Thu, 6 Jul 2017 03:46:36 +0200
Subject: [PATCH] [Rule] MaxInkDensityImage - transform colorspace when
 necessary

---
 Rule/MaxInkDensityImage.php | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/Rule/MaxInkDensityImage.php b/Rule/MaxInkDensityImage.php
index 03fcb42..837a69d 100644
--- a/Rule/MaxInkDensityImage.php
+++ b/Rule/MaxInkDensityImage.php
@@ -26,20 +26,15 @@ public function validate(Document $document) : array
         foreach ($document->getObjectsByType('XObject', 'Image') as $k => $image) {
             $img = Utils::imageToImagick($image);
 
+            if ($img->getColorspace() != \Imagick::COLORSPACE_CMYK) {
+                $img->transformImageColorspace(\Imagick::COLORSPACE_CMYK);
+            }
+
             // $img->getImageTotalInkDensity() returns a totally wrong value, no idea what would that mean
 
             $identity = $img->identifyImage(true);
             preg_match('/Total ink density: ([0-9]*(.[0-9]*)?)%/', $identity['rawOutput'], $matches);
 
-            if (!isset($matches[1])) {
-                $errors[] = [
-                    'message' => 'Image ink density could not be determined. Not CYMK image?',
-                    'object' => $image,
-                ];
-
-                continue;
-            }
-
             $dens = $matches[1];
 
             if ($dens > $this->limit) {