56 lines
1.9 KiB
C++
56 lines
1.9 KiB
C++
/*
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* Copyright 2014 Google Inc.
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*
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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*/
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#include "Path2D.h"
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#include "Global.h"
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Global* Path2D::gGlobal = NULL;
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v8::Persistent<v8::ObjectTemplate> Path2D::gPath2DTemplate;
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void weakPath2DCallback(const v8::WeakCallbackData<v8::Object, Path2D>& args) {
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delete args.GetParameter();
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}
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// Wraps an SkPath* in a Path2D object.
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Path2D::Path2D(SkPath* path) : path_(path) {
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// Handle scope for temporary handles.
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v8::HandleScope handleScope(gGlobal->getIsolate());
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// Just once create the ObjectTemplate for what Path2D looks like in JS.
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if (gPath2DTemplate.IsEmpty()) {
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v8::Local<v8::ObjectTemplate> localTemplate = v8::ObjectTemplate::New();
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// Add a field to store the pointer to a SkPath pointer.
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localTemplate->SetInternalFieldCount(1);
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gPath2DTemplate.Reset(gGlobal->getIsolate(), localTemplate);
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}
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v8::Handle<v8::ObjectTemplate> templ =
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v8::Local<v8::ObjectTemplate>::New(gGlobal->getIsolate(), gPath2DTemplate);
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// Create an empty Path2D wrapper.
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v8::Local<v8::Object> result = templ->NewInstance();
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// Store the SkPath pointer in the JavaScript wrapper.
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result->SetInternalField(0, v8::External::New(gGlobal->getIsolate(), this));
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gGlobal->getIsolate()->AdjustAmountOfExternalAllocatedMemory(sizeof(SkPath));
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// Make a weak persistent and set up the callback so we can delete the path pointer.
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// TODO(jcgregorio) Figure out why weakPath2DCallback never gets called and we leak.
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v8::Persistent<v8::Object> weak(gGlobal->getIsolate(), result);
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weak.SetWeak(this, weakPath2DCallback);
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this->handle_.Reset(gGlobal->getIsolate(), weak);
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}
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Path2D::~Path2D() {
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delete path_;
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handle_.Reset();
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gGlobal->getIsolate()->AdjustAmountOfExternalAllocatedMemory(-sizeof(SkPath));
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}
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