From 61e81e087eb8a83076870360678fe96a733447e6 Mon Sep 17 00:00:00 2001
From: Marc MAURICE <marc-bizou@pub.positon.org>
Date: Fri, 3 Apr 2015 20:28:14 +0200
Subject: [PATCH] honor jpeg orientation fixed bad thumb generation in case of
 wrong permission added jpeg quality config

---
 config.php    |    1 +
 functions.php |   20 +++++++++++++++-----
 template.php  |    3 ++-
 3 files changed, 18 insertions(+), 6 deletions(-)

diff --git a/config.php b/config.php
index f81eeeb..a4d29c9 100644
--- a/config.php
+++ b/config.php
@@ -1,5 +1,6 @@
 <?php
 define('THUMB_SIZE', 100);
+define('JPEG_QUALITY', '80');
 define('DATA_DIR', 'data');
 define('IMAGES_DIR', 'images');
 define('DATA_UMASK', 0002); # 0002: allow group to write for files created in data dir. change to 0022 to be more strict.
diff --git a/functions.php b/functions.php
index ebad504..867bb49 100644
--- a/functions.php
+++ b/functions.php
@@ -50,10 +50,13 @@ function getPreview($imgFile, $maxSize = THUMB_SIZE)
 		set_time_limit(20);
 
 		$ext = strtolower(substr($imgFile, -4));
-		if ($ext == ".jpg")
+		if ($ext == ".jpg") {
 			$img = imagecreatefromjpeg($imgFile);
-		else
+			$exif = exif_read_data($imgFile);
+		} else {
 			$img = imagecreatefrompng($imgFile);
+		}
+		if ($img === false) return ""; #read error (wrong permission...)
 
 		$w = imagesx($img);
 		$h = imagesy($img);
@@ -82,10 +85,17 @@ function getPreview($imgFile, $maxSize = THUMB_SIZE)
 
 		imagecopyresampled($newImg, $img, 0, 0, 0, 0, $newW, $newH, $w, $h);
 
-		if ($ext == ".jpg")
-			imagejpeg($newImg, $newImgFile);
-		else
+		if ($ext == ".jpg") {
+			if (!empty($exif['Orientation'])) {
+				$orientation = $exif['Orientation'];
+				if     ($orientation === 3) $newImg = imagerotate($newImg, 180, 0);
+				elseif ($orientation === 6) $newImg = imagerotate($newImg, -90, 0);
+				elseif ($orientation === 8) $newImg = imagerotate($newImg, 90, 0);
+			}
+			imagejpeg($newImg, $newImgFile, JPEG_QUALITY);
+		} else {
 			imagepng($newImg, $newImgFile);
+		}
 		
 		imagedestroy($img);
 		imagedestroy($newImg);
diff --git a/template.php b/template.php
index 042f0e4..28d5985 100644
--- a/template.php
+++ b/template.php
@@ -74,7 +74,8 @@ a {
 
 <div id="images">
 <?php foreach ($imageFiles as $file) { ?>
-	<div class="square"><div class="image imagepreview"><a href="<?= $file["link"] ?>"><img src="<?= $rootUrl.getPreview($file["file"]) ?>" alt="<?= $file["name"] ?>" /></a></div><?php plugins_include("after_thumb.php") ?></div>
+<?php $previewfile = $rootUrl.getPreview($file["file"]) ?>
+	<div class="square"><div class="image imagepreview"><a href="<?= $file["link"] ?>"><img src="<?= $previewfile ?>" alt="<?= $file["name"] ?>" /></a></div><?php plugins_include("after_thumb.php") ?></div>
 	<?php if (isset($generating)) { ob_flush(); flush(); } ?>
 <?php } ?>
 </div>
-- 
1.7.10.4