X-Git-Url: http://git.shiar.nl/minimedit.git/blobdiff_plain/1c59746cd8e71b6150e2cb2914a640155ef66aeb..f8288b710e1090d88dcacb0fa28823cdbe14072a:/thumb/index.php

diff --git a/thumb/index.php b/thumb/index.php
index 5327192..27a194e 100644
--- a/thumb/index.php
+++ b/thumb/index.php
@@ -1,34 +1,100 @@
 <?php
 ob_clean();
 
-list ($height, $imgpath) = explode('/', ltrim($Args, '/'), 2);
-$width= 1000;
+list ($size, $imgpath) = explode('/', ltrim($Args, '/'), 2);
 $imgpath = preg_replace('{^(?=[0-9]+/)}', 'data/', $imgpath, 1);
 
 if (!file_exists($imgpath)) {
 	http_response_code(404);
+	$imgpath = '404.png';
+	if (!file_exists($imgpath)) {
+		exit;
+	}
+}
+
+try {
+	$target = mkthumb($imgpath, $size);
+}
+catch (Throwable $e) {
+	http_response_code($e->getCode() ?: 500);
+	header("X-Error: ".explode("\n", $e->getMessage())[0], FALSE);
+	$target = '500.png';
+	if (file_exists($target)) {
+		header('Content-type: '.mime_content_type($target));
+		readfile($target);
+		exit;
+	}
+	trigger_error("thumbnail creation failed: ".$e->getMessage(), E_USER_WARNING);
 	exit;
 }
 
-$target = "thumb/$height/$imgpath";
-if (!file_exists($target)) {
+header('Content-type: '.mime_content_type($target));
+readfile($target);
+exit;
+
+function mkthumb($source, $size)
+{
+	if (strpos($size, 'x') !== FALSE) {
+		list ($width, $height) = explode('x', $size);
+		if (empty($height)) {
+			$height = $width * 4;
+		}
+	}
+	else {
+		$height = $size;
+	}
+	if (empty($width)) {
+		$width = $height * 4;
+	}
+	$target = "thumb/$size/$source";
+
+	if (isset($_GET['backend'])) {
+		$backend = $_GET['backend'];
+	}
+	elseif (file_exists($target)) {
+		return $target;
+	}
+	elseif (extension_loaded('gd')) {
+		$backend = 'gd';
+	}
+	else {
+		$backend = 'exec';
+	}
+	$backend = "mkthumb_$backend";
+
 	@mkdir(dirname($target), 0777, TRUE);
+	$backend($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);
+	}
 	$cmd = implode(' ', array_map('escapeshellarg', [
 		'convert',
 		'-trim',
 		'-resize', "${width}x${height}",
 		'-quality', '90%',
-		$imgpath, $target
+		$source, "jpg:$target"
 	]));
 	$return = shell_exec("$cmd 2>&1");
 	if ($return) {
-		http_response_code(500);
-		trigger_error("thumbnail creation failed: $return", E_USER_WARNING);
-		exit;
+		throw new Exception($return);
 	}
 }
-
-header('Content-type: '.mime_content_type($target));
-readfile($target);
-exit;