From d55ef442cd861d04b9ccfd4493aedf0c9a4164ff Mon Sep 17 00:00:00 2001
From: Georg Ehrke <developer@georgehrke.com>
Date: Tue, 4 Feb 2014 12:59:14 +0100
Subject: [PATCH] properly check if pdf and svg modules are installed

---
 lib/private/preview/office.php  | 2 +-
 lib/private/preview/pdf.php     | 2 +-
 lib/private/preview/svg.php     | 2 +-
 lib/private/preview/unknown.php | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/lib/private/preview/office.php b/lib/private/preview/office.php
index 7a4826c76e..884b6e7dc9 100644
--- a/lib/private/preview/office.php
+++ b/lib/private/preview/office.php
@@ -6,7 +6,7 @@
  * See the COPYING-README file.
  */
 //both, libreoffice backend and php fallback, need imagick
-if (extension_loaded('imagick')) {
+if (extension_loaded('imagick') && count(\Imagick::queryFormats("PDF")) === 1) {
 	$isShellExecEnabled = \OC_Helper::is_function_enabled('shell_exec');
 
 	// LibreOffice preview is currently not supported on Windows
diff --git a/lib/private/preview/pdf.php b/lib/private/preview/pdf.php
index cc974b6881..572b8788ac 100644
--- a/lib/private/preview/pdf.php
+++ b/lib/private/preview/pdf.php
@@ -7,7 +7,7 @@
  */
 namespace OC\Preview;
 
-if (extension_loaded('imagick')) {
+if (extension_loaded('imagick') && count(\Imagick::queryFormats("PDF")) === 1) {
 
 	class PDF extends Provider {
 
diff --git a/lib/private/preview/svg.php b/lib/private/preview/svg.php
index b49e51720f..07a37e8f8c 100644
--- a/lib/private/preview/svg.php
+++ b/lib/private/preview/svg.php
@@ -7,7 +7,7 @@
  */
 namespace OC\Preview;
 
-if (extension_loaded('imagick')) {
+if (extension_loaded('imagick') && count(\Imagick::queryFormats("SVG")) === 1) {
 
 	class SVG extends Provider {
 
diff --git a/lib/private/preview/unknown.php b/lib/private/preview/unknown.php
index 4747f9e25e..8145c82614 100644
--- a/lib/private/preview/unknown.php
+++ b/lib/private/preview/unknown.php
@@ -22,7 +22,7 @@ class Unknown extends Provider {
 
 		$svgPath = substr_replace($path, 'svg', -3);
 
-		if (extension_loaded('imagick') && file_exists($svgPath)) {
+		if (extension_loaded('imagick') && file_exists($svgPath) && count(\Imagick::queryFormats("SVG")) === 1) {
 
 			// http://www.php.net/manual/de/imagick.setresolution.php#85284
 			$svg = new \Imagick();