From e1e870c174b5077c00fb77e04331196db120d998 Mon Sep 17 00:00:00 2001
From: Nathan Gray <nathangray.bsc@gmail.com>
Date: Thu, 12 Feb 2015 18:24:47 +0000
Subject: [PATCH] Add initial support for PDF thumbnails

---
 etemplate/thumbnail.php         | 38 +++++++++++++++++++++++++++++----
 phpgwapi/js/jsapi/egw_images.js |  2 +-
 2 files changed, 35 insertions(+), 5 deletions(-)

diff --git a/etemplate/thumbnail.php b/etemplate/thumbnail.php
index 9065eb8436..6ce4dfb845 100644
--- a/etemplate/thumbnail.php
+++ b/etemplate/thumbnail.php
@@ -308,12 +308,18 @@ function gd_image_load($file)
 				return imagecreatefromwbmp($file);
 		}
 	}
-	else if ($type == 'application' && strpos($image_type,'vnd.oasis.opendocument.') === 0)
+	else if ($type == 'application')
 	{
-		// OpenDocuments have thumbnails inside already
-		return get_opendocument_thumbnail($file);
+		if(strpos($image_type,'vnd.oasis.opendocument.') === 0)
+		{
+			// OpenDocuments have thumbnails inside already
+			return get_opendocument_thumbnail($file);
+		}
+		else if($image_type == 'pdf')
+		{
+			return get_pdf_thumbnail($file);
+		}
 	}
-
 	return false;
 }
 
@@ -366,6 +372,30 @@ function get_opendocument_thumbnail($file)
 	return $image;
 }
 
+/**
+ * Extract the thumbnail from a PDF file and apply a colored mask
+ * so you can tell what type it is, and so it looks a little better in larger
+ * thumbnails (eg: in tiled view).
+ *
+ * Requires ImageMagick & ghostscript.
+ *
+ * @param string $file
+ * @return resource GD image
+ */
+function get_pdf_thumbnail($file)
+{
+	if(!class_exists('Imagick')) return false;
+
+	$im = new Imagick($file);
+	$im->setimageformat('png');
+	$im->setresolution(300, 300);
+
+	$gd = imagecreatefromstring($im->getimageblob());
+	//$mask = imagecreatefrompng('templates/default/images/mask_pdf.png');
+	//imagecopyresampled($image, $mask,0,0,0,0,imagesx($mask),imagesy($mask),imagesx($mask),imagesy($mask));
+	return $gd;
+}
+
 /**
  * Create an gd_image with transparent background.
  *
diff --git a/phpgwapi/js/jsapi/egw_images.js b/phpgwapi/js/jsapi/egw_images.js
index 07402286f3..51f2c2edb6 100644
--- a/phpgwapi/js/jsapi/egw_images.js
+++ b/phpgwapi/js/jsapi/egw_images.js
@@ -135,7 +135,7 @@ egw.extend('images', egw.MODULE_GLOBAL, function() {
 
 			}
 			else if (typeof _path == 'string' && (type[0] == 'image' && type[1].match(/^(png|jpe?g|gif|bmp)$/) ||
-				type[0] == 'application' && type[1].indexOf('vnd.oasis.opendocument.') === 0))
+				type[0] == 'application' && (type[1].indexOf('vnd.oasis.opendocument.') === 0 || type[1] == 'pdf')))
 			{
 				var thsize = this.config('link_list_thumbnail') || 64;
 				image = this.link('/etemplate/thumbnail.php',{ 'path': _path, 'thsize': thsize});