From 12a27fa3b501cf08091cd063dd3208a17e0f624a Mon Sep 17 00:00:00 2001
From: Greg Froese <greg.froese@gmail.com>
Date: Wed, 20 May 2009 05:01:21 +0000
Subject: added exif support

---
 lib/exif.php | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 lib/exif.php

(limited to 'lib/exif.php')

diff --git a/lib/exif.php b/lib/exif.php
new file mode 100644
index 000000000..1b6c2cbd2
--- /dev/null
+++ b/lib/exif.php
@@ -0,0 +1,35 @@
+<?php
+include_once dirname(__FILE__) . "/tidypics.php";
+
+function td_get_exif(Elggfile $file) {
+	$my_file = str_replace("image", "", tp_get_img_dir()) . $file->getFilename();
+	$exif = exif_read_data($my_file);
+	create_metadata($file->getGUID(), "tp_exif", serialize($exif), "string", $file->getObjectOwnerGUID(), 2);
+}
+
+function tp_exif_formatted($file_guid) {
+	$metadata_exif = get_metadata_byname($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];
+		$Focal = explode("/", $exif['FocalLength']);
+		$Focal = $Focal[0] / $Focal[1];
+		
+		//prepare the text for return
+		$exif_text = "Model: ".$exif['Model']."<br>";
+		$exif_text .= "Shutter: ".$exif['ExposureTime']."<br>";
+		$exif_text .= "Aperture: f/".$Fnumber."<br>";
+		$exif_text .= "ISO Speed: ".$exif['ISOSpeedRatings']."<br>";
+		$exif_text .= "Focal Length: ".round($Focal)."mm<br>";
+		$exif_text .= "Captured: ". $exif['DateTime'];
+	
+		return "<tr><td>$exif_text</td></tr>";
+	} else {
+		return false;
+	}
+}
+?>
\ No newline at end of file
-- 
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