Merge pull request Automattic#169 from andreasbotsikas/windows-build

Added instructions and the binding.gyp to build the module in windows

binding.gyp

@@ -0,0 +1,30 @@
+{
+  'variables': {
+    # Set the location of GTK all-in-one bundle
+	'GTK_Root': 'C:/GTK',
+  },
+  'targets': [
+    {
+      'target_name': 'canvas',
+      'sources': [ 
+			'src/Canvas.cc',
+			'src/CanvasGradient.cc',
+			'src/CanvasPattern.cc',
+			'src/CanvasRenderingContext2d.cc',
+			'src/color.cc',
+			'src/Image.cc',
+			'src/ImageData.cc',
+			'src/init.cc',
+			'src/PixelArray.cc',
+		],
+	  'libraries': ['-l<(GTK_Root)/lib/cairo.lib' ],
+		  'include_dirs': [
+		   '<(GTK_Root)/include/cairo',
+		  ],
+	  'defines': [
+			'snprintf=_snprintf',
+			'_USE_MATH_DEFINES' # for M_PI
+		],
+    }
+  ]
+}

src/init.cc

@@ -25,3 +25,5 @@ init (Handle<Object> target) {
   Pattern::Initialize(target);
   target->Set(String::New("cairoVersion"), String::New(cairo_version_string()));
 }
+
+NODE_MODULE(canvas,init);