From 230611991cf21a844e461178ddce133fa39f098f Mon Sep 17 00:00:00 2001
From: Tj Holowaychuk <tj@vision-media.ca>
Date: Thu, 30 Sep 2010 11:02:15 -0700
Subject: [PATCH] Added globalAlpha getter/setter

---
 src/context2d.cc | 22 ++++++++++++++++++++++
 src/context2d.h  |  3 +++
 2 files changed, 25 insertions(+)

diff --git a/src/context2d.cc b/src/context2d.cc
index 52ec7b4..f82e9b6 100644
--- a/src/context2d.cc
+++ b/src/context2d.cc
@@ -100,6 +100,7 @@ Context2d::Initialize(Handle<Object> target) {
   NODE_SET_PROTOTYPE_METHOD(t, "arc", Arc);
   NODE_SET_PROTOTYPE_METHOD(t, "setFillRGBA", SetFillRGBA);
   NODE_SET_PROTOTYPE_METHOD(t, "setStrokeRGBA", SetStrokeRGBA);
+  proto->SetAccessor(String::NewSymbol("globalAlpha"), GetGlobalAlpha, SetGlobalAlpha);
   proto->SetAccessor(String::NewSymbol("miterLimit"), GetMiterLimit, SetMiterLimit);
   proto->SetAccessor(String::NewSymbol("lineWidth"), GetLineWidth, SetLineWidth);
   proto->SetAccessor(String::NewSymbol("lineCap"), GetLineCap, SetLineCap);
@@ -128,6 +129,7 @@ Context2d::Context2d(Canvas *canvas): ObjectWrap() {
   _canvas = canvas;
   _context = cairo_create(canvas->getSurface());
   cairo_set_line_width(_context, 1);
+  globalAlpha = NULL;
   RGBA(fill,0,0,0,1);
   RGBA(stroke,0,0,0,1);
 }
@@ -140,6 +142,26 @@ Context2d::~Context2d() {
   cairo_destroy(_context);
 }
 
+/*
+ * Get global alpha.
+ */
+
+Handle<Value>
+Context2d::GetGlobalAlpha(Local<String> prop, const AccessorInfo &info) {
+  Context2d *context = ObjectWrap::Unwrap<Context2d>(info.This());
+  return Number::New(context->globalAlpha);
+}
+
+/*
+ * Set global alpha.
+ */
+
+void
+Context2d::SetGlobalAlpha(Local<String> prop, Local<Value> val, const AccessorInfo &info) {
+  Context2d *context = ObjectWrap::Unwrap<Context2d>(info.This());
+  context->globalAlpha = val->NumberValue();
+}
+
 /*
  * Get miter limit.
  */
diff --git a/src/context2d.h b/src/context2d.h
index 7249a8f..b9c3695 100644
--- a/src/context2d.h
+++ b/src/context2d.h
@@ -18,6 +18,7 @@ class Context2d: public node::ObjectWrap {
   public:
     rgba_t fill;
     rgba_t stroke;
+    float globalAlpha;
     static void Initialize(Handle<Object> target);
     static Handle<Value> New(const Arguments &args);
     static Handle<Value> Save(const Arguments &args);
@@ -40,10 +41,12 @@ class Context2d: public node::ObjectWrap {
     static Handle<Value> ClearRect(const Arguments &args);
     static Handle<Value> Rect(const Arguments &args);
     static Handle<Value> Arc(const Arguments &args);
+    static Handle<Value> GetGlobalAlpha(Local<String> prop, const AccessorInfo &info);
     static Handle<Value> GetMiterLimit(Local<String> prop, const AccessorInfo &info);
     static Handle<Value> GetLineCap(Local<String> prop, const AccessorInfo &info);
     static Handle<Value> GetLineJoin(Local<String> prop, const AccessorInfo &info);
     static Handle<Value> GetLineWidth(Local<String> prop, const AccessorInfo &info);
+    static void SetGlobalAlpha(Local<String> prop, Local<Value> val, const AccessorInfo &info);
     static void SetMiterLimit(Local<String> prop, Local<Value> val, const AccessorInfo &info);
     static void SetLineCap(Local<String> prop, Local<Value> val, const AccessorInfo &info);
     static void SetLineJoin(Local<String> prop, Local<Value> val, const AccessorInfo &info);