updated documentation for createJPEGStream

Readme.md

@@ -66,7 +66,7 @@ ctx.drawImage(img, 100, 0, 50, 50);
 
 ### Canvas#createPNGStream()
 
-  To create a `PNGStream` simple call `canvas.createPNGStream()`, and the stream will start to emit _data_ events, finally emitting _end_ when finished. If an exception occurs the _error_ event is emitted.
+  To create a `PNGStream` simply call `canvas.createPNGStream()`, and the stream will start to emit _data_ events, finally emitting _end_ when finished. If an exception occurs the _error_ event is emitted.
 
 ```javascript
 var fs = require('fs')
@@ -84,6 +84,10 @@ stream.on('end', function(){
 
 Currently _only_ sync streaming is supported, however we plan on supporting async streaming as well (of course :) ). Until then the `Canvas#toBuffer(callback)` alternative is async utilizing `eio_custom()`.
 
+### Canvas#createJPEGStream()
+
+You can likewise create a `JPEGStream` by calling `canvas.createJPEGStream()` with the optional parameters `bufsize` and `quality`; functionality is otherwise identical to `createPNGStream()`. See `examples/crop.js` for an example.
+
 ### Canvas#toBuffer()
 
 A call to `Canvas#toBuffer()` will return a node `Buffer` instance containing all of the PNG data.

lib/canvas.js

@@ -118,6 +118,7 @@ Canvas.prototype.createSyncPNGStream = function(){
 /**
  * Create a `JPEGStream` for `this` canvas.
  *
+ * @param {Object} [opts] Can optionally contain bufsize or quality settings
  * @return {JPEGStream}
  * @api public
  */
@@ -134,11 +135,17 @@ Canvas.prototype.createJPEGStream = function(opts){
 /**
  * Create a synchronous `JPEGStream` for `this` canvas.
  *
+ * @param {Object} [opts] Can optionally contain bufsize or quality settings
  * @return {JPEGStream}
  * @api public
  */
 
-Canvas.prototype.createSyncJPEGStream = function(){
+Canvas.prototype.createSyncJPEGStream = function(opts){
+  opts = opts || {};
+  options = {
+    bufsize : opts.bufsize || 4096,
+    quality : opts.quality || 60,
+  };
   return new JPEGStream(this, options, true);
 };