From a7b19afaf311ed1ad37596a6fe834f24d1fd3e38 Mon Sep 17 00:00:00 2001
From: Christian Schneider
Date: Mon, 6 Aug 2012 14:24:04 +0000
Subject: add keepalpha option to it::imageconvert(), re-format source to
 better match itools standard

---
 it.class | 38 +++++++++++++++++++++++---------------
 1 file changed, 23 insertions(+), 15 deletions(-)

diff --git a/it.class b/it.class
index 5b34188..4a5a939 100644
--- a/it.class
+++ b/it.class
@@ -571,13 +571,14 @@ static function _exec_quotevalue($value, $errmsg = "")
 
 /**
  * Convert an image to a given size and type (ensures input is an image)
- * @param $p['in']	Input filename (mandatory)
- * @param $p['out']	Output filename (mandatory)
- * @param $p['size']	Width x height of resulting image, e.g. "160x60"
- * @param $p['type']	Output file type, e.g. "jpg"
- * @param $p['types']	Comma separated list of accepted input types, default "bmp,eps,gif,jp2,jpg,png,svg,tif"
- * @param $p['quality']	JPEG quality (0-100), default is 75
- * @param $p['-opts']	Custom command line options to ImageMagick convert
+ * @param $p['in']		Input filename (mandatory)
+ * @param $p['out']		Output filename (mandatory)
+ * @param $p['size']		Width x height of resulting image, e.g. "160x60"
+ * @param $p['type']		Output file type, e.g. "jpg"
+ * @param $p['types']		Comma separated list of accepted input types, default "bmp,eps,gif,jp2,jpg,png,svg,tif"
+ * @param $p['quality']		JPEG quality (0-100), default is 75
+ * @param $p['keepalpha']	Don't add option --flatten to preserve alpha channel
+ * @param $p['-opts']		Custom command line options to ImageMagick convert
  * @return Success of convert as true/false
  */
 static function imageconvert($p)
@@ -591,25 +592,32 @@ static function imageconvert($p)
 	}
 
 	# emulate -auto-orient which is not supported by GM
-	if ($p['-opts']['-auto-orient']) {
+	if ($p['-opts']['-auto-orient'])
+	{
 		$exif = @exif_read_data($p['in'], 'IFD0');
-		switch ($exif['Orientation']) {
-		case 2: $p['-opts']['-flop'] = true;  break;
-		case 3: $p['-opts']['-rotate'] = 180; break;
-		case 4: $p['-opts']['-flip'] = true;  break;
-		case 6: $p['-opts']['-rotate'] = 90;  break;
-		case 8: $p['-opts']['-rotate'] = 270; break;
+		switch ($exif['Orientation'])
+		{
+			case 2: $p['-opts']['-flop'] = true;  break;
+			case 3: $p['-opts']['-rotate'] = 180; break;
+			case 4: $p['-opts']['-flip'] = true;  break;
+			case 6: $p['-opts']['-rotate'] = 90;  break;
+			case 8: $p['-opts']['-rotate'] = 270; break;
 		}
+
 		unset($p['-opts']['-auto-orient']);
 	}
 
 	$type = strtr($type, array("jpeg" => "jpg", "tiff" => "tif", "ps" => "eps", "ept" => "eps"));
 	$p += array('type' => $type, 'types' => "bmp,eps,gif,jp2,jpg,png,svg,tif", 'quality' => 75);
 	$p['-opts'] = array('-thumbnail' => $p['size'], '-quality' => $p['quality']) + (array)$p['-opts'];
+
+	if (!$p['keepalpha'])
+		$p['-opts'] = array_merge(array('-flatten' => true), $p['-opts']);	# flatten must be first
+
 	$ultratimeout = file_exists("/opt/ultra/bin/ultratimeout") ? "/opt/ultra/bin/ultratimeout 30 " : "";
 
 	if (in_array($type, explode(',', $p['types'])))	# Valid type?
-		$cmdoutput = it::exec($ultratimeout . 'gm convert 2>&1 -flatten {-opts} {in} {type}:{out} || echo "SHELL ERROR $?"', $p);
+		$cmdoutput = it::exec($ultratimeout . 'gm convert 2>&1 {-opts} {in} {type}:{out} || echo "SHELL ERROR $?"', $p);
 
 	return $cmdoutput === "";
 }
-- 
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