1 files changed, 110 insertions, 0 deletions
diff --git a/mod/lightpics/lib/exif.php b/mod/lightpics/lib/exif.php
new file mode 100644
index 000000000..46a73e920
--- /dev/null
+++ b/mod/lightpics/lib/exif.php
@@ -0,0 +1,110 @@
+<?php
+/**
+ * Exif Processing Library
+ *
+ * @package TidypicsExif
+ */
+
+/**
+ * Pull EXIF data from image file
+ * 
+ * @param TidypicsImage $image
+ */
+function td_get_exif($image) {
+
+	// catch for those who don't have exif module loaded
+	if (!is_callable('exif_read_data')) {
+		return;
+	}
+
+	$mime = $image->mimetype;
+	if ($mime != 'image/jpeg' && $mime != 'image/pjpeg') {
+		return;
+	}
+
+	$filename = $image->getFilenameOnFilestore();
+	$exif = exif_read_data($filename, 'IFD0,EXIF', true);
+	if (is_array($exif) && isset($exif['EXIF'])) {
+		$data = array_merge($exif['IFD0'], $exif['EXIF']);
+		foreach ($data as $key => $value) {
+			if (is_string($value)) {
+				// there are sometimes unicode characters that cause problems with serialize
+				$data[$key] = preg_replace( '/[^[:print:]]/', '', $value);
+			}
+		}
+		$image->tp_exif = serialize($data);
+	}
+}
+
+/**
+ * Grab array of EXIF data for display
+ * 
+ * @param TidypicsImage $image
+ * @return array|false
+ */
+function tp_exif_formatted($image) {
+
+	$exif = $image->tp_exif;
+	if (!$exif) {
+		return false;
+	}
+
+	$exif = unserialize($exif);
+
+	$model = $exif['Model'];
+	if (!$model) {
+		$model = "N/A";
+	}
+	$exif_data['Model'] = $model;
+
+	$exposure = $exif['ExposureTime'];
+	if (!$exposure) {
+		$exposure = "N/A";
+	}
+	$exif_data['Shutter'] = $exposure;
+
+	//got the code snippet below from http://www.zenphoto.org/support/topic.php?id=17
+	//convert the raw values to understandible values
+	$Fnumber = explode("/", $exif['FNumber']);
+	if ($Fnumber[1] != 0) {
+		$Fnumber = $Fnumber[0] / $Fnumber[1];
+	} else {
+		$Fnumber = 0;
+	}
+	if (!$Fnumber) {
+		$Fnumber = "N/A";
+	} else {
+		$Fnumber = "f/$Fnumber";
+	}
+	$exif_data['Aperture'] = $Fnumber;
+
+	$iso = $exif['ISOSpeedRatings'];
+	if (!$iso) {
+		$iso = "N/A";
+	}
+	$exif_data['ISO Speed'] = $iso;
+
+	$Focal = explode("/", $exif['FocalLength']);
+	if ($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";
+	} else {
+		$Focal = round($Focal) . "mm";
+	}
+	$exif_data['Focal Length'] = $Focal;
+
+	$captured = $exif['DateTime'];
+	if (!$captured) {
+		$captured = "N/A";
+	}
+	$exif_data['Captured'] = $captured;
+
+	return $exif_data;
+}