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1 /* | 1 /* |
2 * Copyright 2013 Google Inc. | 2 * Copyright 2013 Google Inc. |
3 * | 3 * |
4 * | 4 * |
5 * Use of this source code is governed by a BSD-style license that can be | 5 * Use of this source code is governed by a BSD-style license that can be |
6 * found in the LICENSE file. | 6 * found in the LICENSE file. |
7 * | 7 * |
8 */ | 8 */ |
9 | 9 |
10 #ifndef SkV8Example_DEFINED | 10 #ifndef SkV8Example_DEFINED |
11 #define SkV8Example_DEFINED | 11 #define SkV8Example_DEFINED |
12 | 12 |
13 #include <v8.h> | 13 #include "SkWindow.h" |
14 | 14 |
15 #include "SkWindow.h" | 15 class JsContext; |
16 #include "SkPaint.h" | |
17 | |
18 using namespace v8; | |
19 | |
20 class SkCanvas; | |
21 class JsCanvas; | |
22 class Global; | |
23 | 16 |
24 class SkV8ExampleWindow : public SkOSWindow { | 17 class SkV8ExampleWindow : public SkOSWindow { |
25 public: | 18 public: |
26 SkV8ExampleWindow(void* hwnd, JsCanvas* canvas); | 19 SkV8ExampleWindow(void* hwnd, JsContext* canvas); |
27 | 20 |
28 protected: | 21 protected: |
29 virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE; | 22 virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE; |
30 | 23 |
31 #ifdef SK_BUILD_FOR_WIN | 24 #ifdef SK_BUILD_FOR_WIN |
32 virtual void onHandleInval(const SkIRect&) SK_OVERRIDE; | 25 virtual void onHandleInval(const SkIRect&) SK_OVERRIDE; |
33 #endif | 26 #endif |
34 | 27 |
35 private: | 28 private: |
36 typedef SkOSWindow INHERITED; | 29 typedef SkOSWindow INHERITED; |
37 JsCanvas* fJsCanvas; | 30 JsContext* fJsContext; |
38 }; | |
39 | |
40 | |
41 // Provides the canvas implementation in JS, and the OnDraw() method in C++ | |
42 // that's used to bridge from C++ to JS. Should be used in JS as: | |
43 // | |
44 // function onDraw(canvas) { | |
45 // canvas.fillStyle="#FF0000"; | |
46 // canvas.fillRect(x, y, w, h); | |
47 // } | |
48 class JsCanvas { | |
49 public: | |
50 JsCanvas(Global* global) | |
51 : fGlobal(global) | |
52 , fCanvas(NULL) | |
53 { | |
54 fFillStyle.setColor(SK_ColorRED); | |
55 } | |
56 ~JsCanvas(); | |
57 | |
58 // Parse the script. | |
59 bool initialize(); | |
60 | |
61 // Call this with the SkCanvas you want onDraw to draw on. | |
62 void onDraw(SkCanvas* canvas); | |
63 | |
64 private: | |
65 // Implementation of the canvas.fillStyle field. | |
66 static void GetFillStyle(Local<String> name, | |
67 const PropertyCallbackInfo<Value>& info); | |
68 static void SetFillStyle(Local<String> name, Local<Value> value, | |
69 const PropertyCallbackInfo<void>& info); | |
70 | |
71 // Implementation of the canvas.fillRect() JS function. | |
72 static void FillRect(const v8::FunctionCallbackInfo<Value>& args); | |
73 | |
74 // Get the pointer out of obj. | |
75 static JsCanvas* Unwrap(Handle<Object> obj); | |
76 | |
77 // Create a template for JS object associated with JsCanvas, called lazily | |
78 // by Wrap() and the results are stored in fCanvasTemplate; | |
79 Handle<ObjectTemplate> makeCanvasTemplate(); | |
80 | |
81 // Wrap the 'this' pointer into an Object. Can be retrieved via Unwrap. | |
82 Handle<Object> wrap(); | |
83 | |
84 Global* fGlobal; | |
85 | |
86 // Only valid when inside OnDraw(). | |
87 SkCanvas* fCanvas; | |
88 | |
89 SkPaint fFillStyle; | |
90 | |
91 // A handle to the onDraw function defined in the script. | |
92 Persistent<Function> fOnDraw; | |
93 | |
94 // The template for what a canvas object looks like. The canvas object is | |
95 // what's passed into the JS onDraw() function. | |
96 static Persistent<ObjectTemplate> fCanvasTemplate; | |
97 }; | 31 }; |
98 | 32 |
99 #endif | 33 #endif |
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