5e44b00392
Adds DrawingMethods with some of the methods it defines. Context is now an implementation of DrawingMethods. The sample.js file now shows how the context is used. Not much new code here, that's mostly in DrawingMethods::DrawPath, most everything else is a code move. BUG=skia: Review URL: https://codereview.chromium.org/676423002
64 lines
1.5 KiB
C++
64 lines
1.5 KiB
C++
/*
|
|
* 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"
|
|
#include "DrawingMethods.h"
|
|
|
|
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 DrawingMethods {
|
|
public:
|
|
JsContext(Global* global)
|
|
: INHERITED(global)
|
|
, fCanvas(NULL)
|
|
{
|
|
}
|
|
virtual ~JsContext() {}
|
|
|
|
// Parse the script.
|
|
bool initialize();
|
|
|
|
// Call this with the SkCanvas you want onDraw to draw on.
|
|
void onDraw(SkCanvas* canvas);
|
|
|
|
virtual SkCanvas* getCanvas() { return fCanvas; };
|
|
|
|
private:
|
|
|
|
// Wrap the 'this' pointer into an Object. Can be retrieved via Unwrap.
|
|
v8::Handle<v8::Object> wrap();
|
|
|
|
// A handle to the onDraw function defined in the script.
|
|
v8::Persistent<v8::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 v8::Persistent<v8::ObjectTemplate> gContextTemplate;
|
|
|
|
// Only valid when inside OnDraw().
|
|
SkCanvas* fCanvas;
|
|
|
|
typedef DrawingMethods INHERITED;
|
|
};
|
|
|
|
#endif
|