1 files changed, 98 insertions, 0 deletions
diff --git a/utils/imagecache.php b/utils/imagecache.php
new file mode 100644
index 0000000..39c741e
--- /dev/null
+++ b/utils/imagecache.php
@@ -0,0 +1,98 @@
+<?php
+
+include_once("config.php");
+
+function rescale($image, $maxwidth, $maxheight)
+{
+	$width = imagesx($image);
+	$height = imagesy($image);
+
+	if($width <= $maxwidth && $height <= $maxheight) return $image;
+
+	$scale = 1;
+	if($width > $maxwidth) $scale = $width / $maxwidth;
+	if($height / $scale > $maxheight) $scale = $height / $maxheight;
+
+	$image_p = imagecreatetruecolor($width / $scale, $height / $scale);
+	imagecopyresampled($image_p, $image, 0, 0, 0, 0, $width / $scale, $height / $scale, $width, $height);
+
+	return $image_p;
+}
+
+function errorImage($message)
+{
+	header("Content-type: image/png");
+	$im = @imagecreate(8 + strlen($message) * 5, 20)
+		or die("Cannot Initialize new GD image stream");
+	$background_color = imagecolorallocate($im, 0, 0, 0);
+	$text_color = imagecolorallocate($im, 233, 14, 91);
+	imagestring($im, 1, 5, 5,  $message, $text_color);
+	imagepng($im);
+	imagedestroy($im);
+}
+
+function getCachedImage($filename, $maxwidth, $maxheight)
+{
+	global $IMAGECACHE;
+	$fullfilename = $IMAGECACHE . "/" . $maxwidth . ":" . $maxheight . ":". urlencode($filename);
+
+	// Test the storage dir
+	if(!file_exists($IMAGECACHE)) {
+		if(!mkdir($IMAGECACHE)) errorImage("Could not create directory: " . $IMAGECACHE);
+	}
+	if(!is_dir($IMAGECACHE)) errorImage($IMAGECACHE . " exists but is not a directory");
+	if(!is_readable($IMAGECACHE) || !is_writeable($IMAGECACHE) || !is_executable($IMAGECACHE)) {
+		errorImage($IMAGECACHE . " exists but does not have the correct permissions. (r/w/x)");
+	}
+	// end of dir test
+
+	if(!file_exists($fullfilename)) {
+
+		$url = parse_url($filename);
+		$filetype = strrchr($url["path"], '.');
+		
+		if( true || ping($url["hostname"], 1000) != -1) {
+			
+			error_reporting(E_ERROR | E_PARSE); 
+
+			switch(strtolower($filetype)) {
+			case ".jpeg":
+			case ".jpg":
+				$image = imagecreatefromjpeg(urldecode($filename));
+				if(!$image) errorImage("Could not read: ". $filename);
+				$image = rescale($image, $maxwidth, $maxheight);
+				imagejpeg($image, $fullfilename, 90);
+				break;
+
+			case ".gif":
+				$image = imagecreatefromgif(urldecode($filename));
+				if(!$image) errorImage("Could not read: ". $filename);
+				$image = rescale($image, $maxwidth, $maxheight);
+				imagegif($image, $fullfilename);
+				break;
+
+			case ".png":
+				$image = imagecreatefrompng(urldecode($filename));
+				if(!$image) errorImage("Could not read: ". $filename);
+				$image = rescale($image, $maxwidth, $maxheight);
+				imagepng($image, $fullfilename);
+				break;
+
+			default:
+				if(!$image) errorImage("Unknown image type " . $filetype);
+				break;
+			}
+			
+			error_reporting(E_ALL ^ E_NOTICE);
+
+		}
+	}
+
+	header('Content-Description: File Transfer');
+	header('Content-Type: image/jpeg');
+	header('Content-Length: ' . filesize($fullfilename));
+	header('Content-Disposition: inline; filename=' . basename($filename));
+	readfile($fullfilename); 
+}
+
+?>
+\ No newline at end of file