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1 /* | 1 /* |
2 * Copyright 2014 Google Inc. | 2 * Copyright 2014 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_JsContext_DEFINED | 10 #ifndef SkV8Example_JsContext_DEFINED |
11 #define SkV8Example_JsContext_DEFINED | 11 #define SkV8Example_JsContext_DEFINED |
12 | 12 |
13 #include <v8.h> | 13 #include <v8.h> |
14 | 14 |
15 #include "SkPaint.h" | 15 #include "SkPaint.h" |
16 #include "BaseContext.h" | 16 #include "BaseContext.h" |
17 | 17 |
18 using namespace v8; | |
19 | |
20 class SkCanvas; | 18 class SkCanvas; |
21 class Global; | 19 class Global; |
22 | 20 |
23 // Provides the canvas context implementation in JS, and the OnDraw() method in | 21 // Provides the canvas context implementation in JS, and the OnDraw() method in |
24 // C++ that's used to bridge from C++ to JS. Should be used in JS as: | 22 // C++ that's used to bridge from C++ to JS. Should be used in JS as: |
25 // | 23 // |
26 // function onDraw(context) { | 24 // function onDraw(context) { |
27 // context.fillStyle="#FF0000"; | 25 // context.fillStyle="#FF0000"; |
28 // context.fillRect(x, y, w, h); | 26 // context.fillRect(x, y, w, h); |
29 // } | 27 // } |
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40 bool initialize(); | 38 bool initialize(); |
41 | 39 |
42 // Call this with the SkCanvas you want onDraw to draw on. | 40 // Call this with the SkCanvas you want onDraw to draw on. |
43 void onDraw(SkCanvas* canvas); | 41 void onDraw(SkCanvas* canvas); |
44 | 42 |
45 virtual SkCanvas* getCanvas() { return fCanvas; }; | 43 virtual SkCanvas* getCanvas() { return fCanvas; }; |
46 | 44 |
47 private: | 45 private: |
48 | 46 |
49 // Wrap the 'this' pointer into an Object. Can be retrieved via Unwrap. | 47 // Wrap the 'this' pointer into an Object. Can be retrieved via Unwrap. |
50 Handle<Object> wrap(); | 48 v8::Handle<v8::Object> wrap(); |
51 | 49 |
52 // A handle to the onDraw function defined in the script. | 50 // A handle to the onDraw function defined in the script. |
53 Persistent<Function> fOnDraw; | 51 v8::Persistent<v8::Function> fOnDraw; |
54 | 52 |
55 // The template for what a canvas context object looks like. The canvas | 53 // The template for what a canvas context object looks like. The canvas |
56 // context object is what's passed into the JS onDraw() function. | 54 // context object is what's passed into the JS onDraw() function. |
57 static Persistent<ObjectTemplate> gContextTemplate; | 55 static v8::Persistent<v8::ObjectTemplate> gContextTemplate; |
58 | 56 |
59 // Only valid when inside OnDraw(). | 57 // Only valid when inside OnDraw(). |
60 SkCanvas* fCanvas; | 58 SkCanvas* fCanvas; |
61 | 59 |
62 typedef BaseContext INHERITED; | 60 typedef BaseContext INHERITED; |
63 }; | 61 }; |
64 | 62 |
65 #endif | 63 #endif |
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