From eaa3fb3f863b4cec711fec01f09b38a1ab333eef Mon Sep 17 00:00:00 2001
From: Patrick Davison <snapwilliam@gmail.com>
Date: Thu, 14 Mar 2013 16:19:11 -0700
Subject: Image rotation for emblems.

---
 images/marks/rotate.php | 64 +++++++++++++++++++++++++++++++++++++++++++++++++
 images/rotate.php       | 20 ----------------
 2 files changed, 64 insertions(+), 20 deletions(-)
 create mode 100644 images/marks/rotate.php
 delete mode 100644 images/rotate.php

diff --git a/images/marks/rotate.php b/images/marks/rotate.php
new file mode 100644
index 0000000..9b0a3fe
--- /dev/null
+++ b/images/marks/rotate.php
@@ -0,0 +1,64 @@
+<?php
+// File and rotation
+$filename = 'OffsetStripesDiagonal_B.png';
+$rotate = $_GET['r'] * 1;
+//Probably not the best syntax.
+if (!is_int($rotate) OR !($rotate > 0) OR !($rotate < 4)) exit;
+
+$emblem = $_GET['emblem'];
+$degrees = $_GET['r'] * 90;
+
+// Content type
+header('Content-type: image/jpeg');
+//TODO Add cache
+
+$simage = @imagecreatefrompng($emblem);
+if(!$simage) {
+	exit;
+}
+
+$background = imagecolorallocate($simage, 0, 0, 0);
+//$simage = rotateMaintain($simage, $degrees, $background);
+$simage = imagerotate($simage, $degrees, 0);
+// removing the black from the placeholder
+imagecolortransparent($simage, $background);
+// turning off alpha blending (to ensure alpha channel information 
+// is preserved, rather than removed (blending with the rest of the 
+// image in the form of black))
+imagealphablending($simage, false);
+// turning on alpha channel information saving (to ensure the full range 
+// of transparency is preserved)
+imagesavealpha($simage, true);
+imagepng($simage);
+
+
+
+//Couldn't do this and maintain transparency ?
+function rotateMaintain($img1, $angle, $background) {
+	$width_before = imagesx($img1);
+	
+	$height_before = imagesy($img1);
+	$img1 = imagerotate($img1, $angle, $background);
+
+	//but imagerotate scales, so we clip to the original size
+	$img2 = @imagecreatetruecolor($width_before, $height_before);
+	$new_width = imagesx($img1); // whese dimensions are
+	$new_height = imagesy($img1);// the scaled ones (by imagerotate)
+	imagecopyresampled(
+		$img2, $img1,
+		0, 0,
+		($new_width-$width_before)/2,
+		($new_height-$height_before)/2,
+		$width_before,
+		$height_before,
+		$width_before,
+		$height_before
+	);
+	return $img2;
+}
+
+
+
+
+
+?>
\ No newline at end of file
diff --git a/images/rotate.php b/images/rotate.php
deleted file mode 100644
index ae0df87..0000000
--- a/images/rotate.php
+++ /dev/null
@@ -1,20 +0,0 @@
-<?php
-// File and rotation
-$filename = 'OverlayStart50.png';
-
-$degrees = $_GET['r'] * 90;
-//$degrees = 180;
-
-// Content type
-header('Content-type: image/jpeg');
-
-// Load
-$source = imagecreatefrompng($filename);
-
-// Rotate
-$rotate = imagerotate($source, $degrees, 0);
-
-// Output
-imagepng($rotate);
-
-?>
\ No newline at end of file
-- 
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