Added `Canvas#type` getter

src/Canvas.cc

@@ -41,6 +41,7 @@ Canvas::Initialize(Handle<Object> target) {
 #ifdef HAVE_JPEG
   NODE_SET_PROTOTYPE_METHOD(constructor, "streamJPEGSync", StreamJPEGSync);
 #endif
+  proto->SetAccessor(String::NewSymbol("type"), GetType);
   proto->SetAccessor(String::NewSymbol("width"), GetWidth, SetWidth);
   proto->SetAccessor(String::NewSymbol("height"), GetHeight, SetHeight);
   target->Set(String::NewSymbol("Canvas"), constructor->GetFunction());
@@ -65,6 +66,17 @@ Canvas::New(const Arguments &args) {
   return args.This();
 }
 
+/*
+ * Get type string.
+ */
+
+Handle<Value>
+Canvas::GetType(Local<String> prop, const AccessorInfo &info) {
+  HandleScope scope;
+  Canvas *canvas = ObjectWrap::Unwrap<Canvas>(info.This());
+  return scope.Close(String::New(canvas->isPDF() ? "pdf" : "image"));
+}
+
 /*
  * Get width.
  */

src/Canvas.h

@@ -48,6 +48,7 @@ class Canvas: public node::ObjectWrap {
     static void Initialize(Handle<Object> target);
     static Handle<Value> New(const Arguments &args);
     static Handle<Value> ToBuffer(const Arguments &args);
+    static Handle<Value> GetType(Local<String> prop, const AccessorInfo &info);
     static Handle<Value> GetWidth(Local<String> prop, const AccessorInfo &info);
     static Handle<Value> GetHeight(Local<String> prop, const AccessorInfo &info);
     static void SetWidth(Local<String> prop, Local<Value> val, const AccessorInfo &info);

test/canvas.test.js

@@ -158,6 +158,15 @@ module.exports = {
     assert.equal('#000000', ctx.fillStyle);
   },
 
+  'test Canvas#type': function(){
+    var canvas = new Canvas(10, 10);
+    assert('image' == canvas.type);
+    var canvas = new Canvas(10, 10, 'pdf');
+    assert('pdf' == canvas.type);
+    var canvas = new Canvas(10, 10, 'hey');
+    assert('image' == canvas.type);
+  },
+
   'test Canvas#getContext("2d")': function(){
     var canvas = new Canvas(200, 300)
       , ctx = canvas.getContext('2d');