From feafe2b9995a62692f19ecdd70da28317c13363c Mon Sep 17 00:00:00 2001
From: Tj Holowaychuk <tj@vision-media.ca>
Date: Mon, 1 Nov 2010 10:35:20 -0700
Subject: [PATCH] Throw since async png streaming is not yet implemented

---
 lib/pngstream.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/pngstream.js b/lib/pngstream.js
index 22df95e..a897abc 100644
--- a/lib/pngstream.js
+++ b/lib/pngstream.js
@@ -41,6 +41,7 @@ var PNGStream = module.exports = function PNGStream(canvas, sync) {
       : 'streamPNG';
   this.sync = sync;
   this.canvas = canvas;
+  if ('streamPNG' == method) throw new Error('async png streaming not yet implemented');
   process.nextTick(function(){
     canvas[method](function(err, chunk, len){
       if (err) {