| /* |
| * Copyright 2014 Google Inc. |
| * |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| * |
| */ |
| |
| #ifndef SkV8Example_JsContext_DEFINED |
| #define SkV8Example_JsContext_DEFINED |
| |
| #include <v8.h> |
| |
| #include "SkPaint.h" |
| |
| using namespace v8; |
| |
| class SkCanvas; |
| class Global; |
| |
| // Provides the canvas context 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(context) { |
| // context.fillStyle="#FF0000"; |
| // context.fillRect(x, y, w, h); |
| // } |
| class JsContext { |
| public: |
| JsContext(Global* global) |
| : fGlobal(global) |
| , fCanvas(NULL) |
| { |
| fFillStyle.setColor(SK_ColorBLACK); |
| fFillStyle.setAntiAlias(true); |
| fFillStyle.setStyle(SkPaint::kFill_Style); |
| fStrokeStyle.setColor(SK_ColorBLACK); |
| fStrokeStyle.setAntiAlias(true); |
| fStrokeStyle.setStyle(SkPaint::kStroke_Style); |
| } |
| ~JsContext(); |
| |
| // Parse the script. |
| bool initialize(); |
| |
| // Call this with the SkCanvas you want onDraw to draw on. |
| void onDraw(SkCanvas* canvas); |
| |
| private: |
| static void GetStyle(Local<String> name, |
| const PropertyCallbackInfo<Value>& info, |
| const SkPaint& style); |
| static void SetStyle(Local<String> name, Local<Value> value, |
| const PropertyCallbackInfo<void>& info, |
| SkPaint& style); |
| // JS Attributes |
| static void GetFillStyle(Local<String> name, |
| const PropertyCallbackInfo<Value>& info); |
| static void SetFillStyle(Local<String> name, Local<Value> value, |
| const PropertyCallbackInfo<void>& info); |
| static void GetStrokeStyle(Local<String> name, |
| const PropertyCallbackInfo<Value>& info); |
| static void SetStrokeStyle(Local<String> name, Local<Value> value, |
| const PropertyCallbackInfo<void>& info); |
| static void GetWidth(Local<String> name, |
| const PropertyCallbackInfo<Value>& info); |
| static void GetHeight(Local<String> name, |
| const PropertyCallbackInfo<Value>& info); |
| |
| // JS Methods |
| static void FillRect(const v8::FunctionCallbackInfo<Value>& args); |
| static void Stroke(const v8::FunctionCallbackInfo<Value>& args); |
| static void Fill(const v8::FunctionCallbackInfo<Value>& args); |
| static void Rotate(const v8::FunctionCallbackInfo<Value>& args); |
| static void Save(const v8::FunctionCallbackInfo<Value>& args); |
| static void Restore(const v8::FunctionCallbackInfo<Value>& args); |
| static void Translate(const v8::FunctionCallbackInfo<Value>& args); |
| static void ResetTransform(const v8::FunctionCallbackInfo<Value>& args); |
| |
| // Get the pointer out of obj. |
| static JsContext* Unwrap(Handle<Object> obj); |
| |
| // Create a template for JS object associated with JsContext, called lazily |
| // by Wrap() and the results are stored in gContextTemplate; |
| Handle<ObjectTemplate> makeContextTemplate(); |
| |
| // Wrap the 'this' pointer into an Object. Can be retrieved via Unwrap. |
| Handle<Object> wrap(); |
| |
| Global* fGlobal; |
| |
| // Only valid when inside OnDraw(). |
| SkCanvas* fCanvas; |
| |
| SkPaint fFillStyle; |
| SkPaint fStrokeStyle; |
| |
| // A handle to the onDraw function defined in the script. |
| Persistent<Function> fOnDraw; |
| |
| // The template for what a canvas context object looks like. The canvas |
| // context object is what's passed into the JS onDraw() function. |
| static Persistent<ObjectTemplate> gContextTemplate; |
| }; |
| |
| #endif |