export the "jpegVersion" when compiled with jpeg support

lib/canvas.js

@@ -37,6 +37,14 @@ exports.version = '0.12.1';
 
 exports.cairoVersion = cairoVersion;
 
+/**
+ * jpeglib version.
+ */
+
+if (canvas.jpegVersion) {
+  exports.jpegVersion = canvas.jpegVersion;
+}
+
 /**
  * Expose constructors.
  */

src/init.cc

@@ -5,6 +5,7 @@
 // Copyright (c) 2010 LearnBoost <tj@learnboost.com>
 //
 
+#include <stdio.h>
 #include "Canvas.h"
 #include "Image.h"
 #include "ImageData.h"
@@ -24,6 +25,11 @@ init (Handle<Object> target) {
   Gradient::Initialize(target);
   Pattern::Initialize(target);
   target->Set(String::New("cairoVersion"), String::New(cairo_version_string()));
+#ifdef HAVE_JPEG
+  char jpeg_version[10];
+  snprintf(jpeg_version, 10, "%d%c", JPEG_LIB_VERSION_MAJOR, JPEG_LIB_VERSION_MINOR + 'a' - 1);
+  target->Set(String::New("jpegVersion"), String::New(jpeg_version));
+#endif
 }
 
 NODE_MODULE(canvas,init);