From b2ef95042c8335e75657b29f6dabbec4d0266426 Mon Sep 17 00:00:00 2001
From: Cash Costello <cash.costello@gmail.com>
Date: Sun, 7 Jun 2009 01:28:16 +0000
Subject: improved exif code - catching pngs, gifs, etc The display code should
 be moved to a view to keep it separate from the controller code

---
 lib/exif.php | 27 +++++++++++++++++++++------
 1 file changed, 21 insertions(+), 6 deletions(-)

(limited to 'lib/exif.php')

diff --git a/lib/exif.php b/lib/exif.php
index 1bebb5fdc..5382fbc9f 100644
--- a/lib/exif.php
+++ b/lib/exif.php
@@ -1,27 +1,39 @@
 <?php
 include_once dirname(__FILE__) . "/tidypics.php";
 
-function td_get_exif($file_guid) {
-	$file = new ElggFile($file_guid);
+function td_get_exif($file) {
+	$mime = $file->mimetype;
+	if ($mime != 'image/jpeg' && $mime != 'image/pjpeg')
+		return;
+
 	$filename = $file->getFilenameOnFilestore();
 	$exif = exif_read_data($filename);
-	create_metadata($file->getGUID(), "tp_exif", serialize($exif), "string", $file->getObjectOwnerGUID(), 2);
+	create_metadata($file->getGUID(), "tp_exif", serialize($exif), "string", $file->getObjectOwnerGUID(), ACCESS_PUBLIC);
 }
 
 function tp_exif_formatted($file_guid) {
+
 	$metadata_exif = get_metadata_byname($file_guid, "tp_exif");
 	if(!$metadata_exif) { //try to load it from the file if its not in the database
-		td_get_exif($file_guid);
+		$file = new ElggFile($file_guid);
+		td_get_exif($file);
+		unset($file);
 		$metadata_exif = get_metadata_byname($file_guid, "tp_exif");
 	}
 	
 	if($metadata_exif) {
+
 		$exif = unserialize($metadata_exif["value"]);
 		
 		//got the code snippet below from http://www.zenphoto.org/support/topic.php?id=17
 		//convert the raw values to understandible values
 		$Fnumber = explode("/", $exif['FNumber']);
-		$Fnumber = $Fnumber[0] / $Fnumber[1];
+		
+		if ($Fnumber[1] != 0)
+			$Fnumber = $Fnumber[0] / $Fnumber[1];
+		else
+			$Fnumber = 0;
+		
 		if(!$Fnumber) {
 			$Fnumber = "N/A";
 		} else {
@@ -29,7 +41,10 @@ function tp_exif_formatted($file_guid) {
 		}
 		
 		$Focal = explode("/", $exif['FocalLength']);
-		$Focal = $Focal[0] / $Focal[1];
+		if ($Focal[1] != 0)
+			$Focal = $Focal[0] / $Focal[1];
+		else
+			$Focal = 0;
 		if(!$Focal || round($Focal) == "0") $Focal = 0;
 		if(round($Focal) == 0) {
 			$Focal = "N/A";
-- 
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