diff options
Diffstat (limited to 'experimental/SkV8Example/SkV8Example.h')
-rw-r--r-- | experimental/SkV8Example/SkV8Example.h | 74 |
1 files changed, 62 insertions, 12 deletions
diff --git a/experimental/SkV8Example/SkV8Example.h b/experimental/SkV8Example/SkV8Example.h index 97cf580171..878e1f0f1f 100644 --- a/experimental/SkV8Example/SkV8Example.h +++ b/experimental/SkV8Example/SkV8Example.h @@ -14,36 +14,86 @@ #include "SkWindow.h" - using namespace v8; - class SkCanvas; - +class JsCanvas; class SkV8ExampleWindow : public SkOSWindow { public: - SkV8ExampleWindow(void* hwnd, - Isolate* isolate, - Handle<Context> context, - Handle<Script> script); - + SkV8ExampleWindow(void* hwnd, JsCanvas* canvas); protected: virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE; - - #ifdef SK_BUILD_FOR_WIN virtual void onHandleInval(const SkIRect&) SK_OVERRIDE; #endif private: typedef SkOSWindow INHERITED; + SkScalar fRotationAngle; + JsCanvas* fJsCanvas; +}; + + +// Provides the canvas implementation in JS, and the OnDraw() method in C++ +// that's used to bridge from C++ to JS. Should be used in JS as: +// +// function onDraw(canvas) { +// canvas.drawRect(); +// canvas.inval(); +// } +// +class JsCanvas { +public: + JsCanvas(Isolate* isolate) + : fIsolate(isolate) + , fCanvas(NULL) + , fWindow(NULL) + {} + ~JsCanvas(); + + // Parse the script. + bool initialize(const char script[]); + + // Call this with the SkCanvas you want onDraw to draw on. + void onDraw(SkCanvas* canvas, SkOSWindow* window); + +private: + // Implementation of the canvas.drawRect() JS function. + static void drawRect(const v8::FunctionCallbackInfo<Value>& args); + + // Implementation of the canvas.inval() JS function. + static void inval(const v8::FunctionCallbackInfo<Value>& args); + + // Get the pointer out of obj. + static JsCanvas* unwrap(Handle<Object> obj); + + // Create a template for JS object associated with JsCanvas, called lazily + // by Wrap() and the results are stored in fCanvasTemplate; + Handle<ObjectTemplate> makeCanvasTemplate(); + + // Wrap the 'this' pointer into an Object. Can be retrieved via Unwrap. + Handle<Object> wrap(); + Isolate* fIsolate; + + // Only valid when inside OnDraw(). + SkCanvas* fCanvas; + + // Only valid when inside OnDraw(). + SkOSWindow* fWindow; + + // The context that the script will be parsed into. Persistent<Context> fContext; - Persistent<Script> fScript; - SkScalar fRotationAngle; + + // A handle to the onDraw function defined in the script. + Persistent<Function> fOnDraw; + + // The template for what a canvas object looks like. The canvas object is + // what's passed into the JS onDraw() function. + static Persistent<ObjectTemplate> fCanvasTemplate; }; #endif |