X-Git-Url: http://git.shiar.net/minimedit.git/blobdiff_plain/6abd5c6f3f81ff63032fe9d85a10b2b66acd7b14..0d9c3baea2fb27d3956258e6911ac9439d63effa:/thumb/index.php

diff --git a/thumb/index.php b/thumb/index.php
index 66de106..1d36948 100644
--- a/thumb/index.php
+++ b/thumb/index.php
@@ -5,43 +5,76 @@ list ($height, $imgpath) = explode('/', ltrim($Args, '/'), 2);
 $width= 1000;
 $imgpath = preg_replace('{^(?=[0-9]+/)}', 'data/', $imgpath, 1);
 
-if (!function_exists('popen')) {
-	http_response_code(501);
-	$target = '501.png';
-	header('Content-type: '.mime_content_type($target));
-	readfile($target);
-	exit;
-}
-
 if (!file_exists($imgpath)) {
 	http_response_code(404);
-	exit;
+	$imgpath = '404.png';
+	if (!file_exists($imgpath)) {
+		exit;
+	}
 }
 
-$target = "thumb/$height/$imgpath";
-if (!file_exists($target)) {
-	try {
-		mkthumb($imgpath, $target, $width, $height);
-	}
-	catch (Exception $e) {
-		http_response_code(500);
-		trigger_error("thumbnail creation failed: ".$e->getMessage(), E_USER_WARNING);
+try {
+	$target = mkthumb($imgpath, $width, $height);
+}
+catch (Throwable $e) {
+	http_response_code($e->getCode() ?: 500);
+	$target = '500.png';
+	if (file_exists($target)) {
+		header("X-Error: ".$e->getMessage());
+		header('Content-type: '.mime_content_type($target));
+		readfile($target);
 		exit;
 	}
+	trigger_error("thumbnail creation failed: ".$e->getMessage(), E_USER_WARNING);
+	exit;
 }
 
 header('Content-type: '.mime_content_type($target));
 readfile($target);
 exit;
 
-function mkthumb($source, $target, $width, $height)
+function mkthumb($source, $width, $height)
 {
+	$target = "thumb/$height/$source";
+
+	if (isset($_GET['backend'])) {
+		$backend = $_GET['backend'];
+	}
+	elseif (file_exists($target)) {
+		return;
+	}
+	elseif (extension_loaded('gd')) {
+		$backend = 'gd';
+	}
+	else {
+		$backend = 'exec';
+	}
+	$backend = "mkthumb_$backend";
+
 	@mkdir(dirname($target), 0777, TRUE);
-	return mkthumb_exec($source, $target, $width, $height);
+	$backend($source, $target, $width, $height);
+	return $target;
+}
+
+function mkthumb_gd($source, $target, $width, $height)
+{
+	$data = imagecreatefromstring(file_get_contents($source));
+	if (!$data) throw new Exception("error reading $source");
+	$orgwidth = imagesx($data);
+	$orgheight = imagesy($data);
+	$width = min($width, $orgwidth * $height / $orgheight);
+	$gd = imagecreatetruecolor($width, $height);
+	//TODO: trim
+	imagecopyresampled($gd, $data, 0, 0, 0, 0,
+			$width, $height, $orgwidth, $orgheight);
+	imagejpeg($gd, $target, 90);
 }
 
 function mkthumb_exec($source, $target, $width, $height)
 {
+	if (!function_exists('popen')) {
+		throw new Exception("exec disallowed on this server", 501);
+	}
 	$cmd = implode(' ', array_map('escapeshellarg', [
 		'convert',
 		'-trim',