From b92797961e63e560fd352b4453883ac65a0958b9 Mon Sep 17 00:00:00 2001
From: Tj Holowaychuk <tj@vision-media.ca>
Date: Fri, 12 Nov 2010 09:59:34 -0800
Subject: [PATCH] Started Context2d#drawImage()

---
 src/CanvasRenderingContext2d.cc | 55 +++++++++++++++++++++++++--------
 src/CanvasRenderingContext2d.h  |  1 +
 2 files changed, 43 insertions(+), 13 deletions(-)

diff --git a/src/CanvasRenderingContext2d.cc b/src/CanvasRenderingContext2d.cc
index 7a139ef..9ae0a86 100644
--- a/src/CanvasRenderingContext2d.cc
+++ b/src/CanvasRenderingContext2d.cc
@@ -9,6 +9,7 @@
 #include <string.h>
 #include <stdlib.h>
 #include "Canvas.h"
+#include "Image.h"
 #include "CanvasRenderingContext2d.h"
 #include "CanvasGradient.h"
 
@@ -66,6 +67,7 @@ Context2d::Initialize(Handle<Object> target) {
 
   // Prototype
   Local<ObjectTemplate> proto = t->PrototypeTemplate();
+  NODE_SET_PROTOTYPE_METHOD(t, "drawImage", DrawImage);
   NODE_SET_PROTOTYPE_METHOD(t, "save", Save);
   NODE_SET_PROTOTYPE_METHOD(t, "restore", Restore);
   NODE_SET_PROTOTYPE_METHOD(t, "rotate", Rotate);
@@ -112,19 +114,6 @@ Context2d::Initialize(Handle<Object> target) {
   target->Set(String::NewSymbol("CanvasRenderingContext2d"), t->GetFunction());
 }
 
-/*
- * Initialize a new Context2d with the given canvas.
- */
-
-Handle<Value>
-Context2d::New(const Arguments &args) {
-  HandleScope scope;
-  Canvas *canvas = ObjectWrap::Unwrap<Canvas>(args[0]->ToObject());
-  Context2d *context = new Context2d(canvas);
-  context->Wrap(args.This());
-  return args.This();
-}
-
 /*
  * Create a cairo context.
  */
@@ -382,6 +371,46 @@ Context2d::blur(cairo_surface_t *surface, int radius) {
   free( precalc );
 }
 
+/*
+ * Initialize a new Context2d with the given canvas.
+ */
+
+Handle<Value>
+Context2d::New(const Arguments &args) {
+  HandleScope scope;
+  Canvas *canvas = ObjectWrap::Unwrap<Canvas>(args[0]->ToObject());
+  Context2d *context = new Context2d(canvas);
+  context->Wrap(args.This());
+  return args.This();
+}
+
+/*
+ * Draw image.
+ */
+
+Handle<Value>
+Context2d::DrawImage(const Arguments &args) {
+  HandleScope scope;
+
+  if (!args[1]->IsNumber()
+    || !args[2]->IsNumber()) return Undefined();
+  
+  // TODO: instanceof
+  Image *img = ObjectWrap::Unwrap<Image>(args[0]->ToObject());
+  Context2d *context = ObjectWrap::Unwrap<Context2d>(args.This());
+
+  double x = args[1]->NumberValue();
+  double y = args[2]->NumberValue();
+  
+  cairo_t *ctx = context->context();
+  cairo_save(ctx);
+  cairo_set_source_surface(ctx, img->surface(), x, y);
+  cairo_paint(ctx);
+  cairo_restore(ctx);
+
+  return Undefined();
+}
+
 /*
  * Get global alpha.
  */
diff --git a/src/CanvasRenderingContext2d.h b/src/CanvasRenderingContext2d.h
index be85cb3..f8f413b 100644
--- a/src/CanvasRenderingContext2d.h
+++ b/src/CanvasRenderingContext2d.h
@@ -47,6 +47,7 @@ class Context2d: public node::ObjectWrap {
     canvas_state_t *state;
     static void Initialize(Handle<Object> target);
     static Handle<Value> New(const Arguments &args);
+    static Handle<Value> DrawImage(const Arguments &args);
     static Handle<Value> Save(const Arguments &args);
     static Handle<Value> Restore(const Arguments &args);
     static Handle<Value> Rotate(const Arguments &args);