1 /* 2 * Copyright 2014 Google Inc. 3 * 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 * 8 */ 9 10 #include "Path2D.h" 11 #include "Global.h" 12 13 Global* Path2D::gGlobal = NULL; 14 v8::Persistent<v8::ObjectTemplate> Path2D::gPath2DTemplate; 15 16 void weakPath2DCallback(const v8::WeakCallbackData<v8::Object, Path2D>& args) { 17 delete args.GetParameter(); 18 } 19 20 // Wraps an SkPath* in a Path2D object. 21 Path2D::Path2D(SkPath* path) : path_(path) { 22 // Handle scope for temporary handles. 23 v8::HandleScope handleScope(gGlobal->getIsolate()); 24 25 // Just once create the ObjectTemplate for what Path2D looks like in JS. 26 if (gPath2DTemplate.IsEmpty()) { 27 v8::Local<v8::ObjectTemplate> localTemplate = v8::ObjectTemplate::New(); 28 29 // Add a field to store the pointer to a SkPath pointer. 30 localTemplate->SetInternalFieldCount(1); 31 32 gPath2DTemplate.Reset(gGlobal->getIsolate(), localTemplate); 33 } 34 v8::Handle<v8::ObjectTemplate> templ = 35 v8::Local<v8::ObjectTemplate>::New(gGlobal->getIsolate(), gPath2DTemplate); 36 37 // Create an empty Path2D wrapper. 38 v8::Local<v8::Object> result = templ->NewInstance(); 39 40 // Store the SkPath pointer in the JavaScript wrapper. 41 result->SetInternalField(0, v8::External::New(gGlobal->getIsolate(), this)); 42 gGlobal->getIsolate()->AdjustAmountOfExternalAllocatedMemory(sizeof(SkPath)); 43 44 // Make a weak persistent and set up the callback so we can delete the path pointer. 45 // TODO(jcgregorio) Figure out why weakPath2DCallback never gets called and we leak. 46 v8::Persistent<v8::Object> weak(gGlobal->getIsolate(), result); 47 weak.SetWeak(this, weakPath2DCallback); 48 this->handle_.Reset(gGlobal->getIsolate(), weak); 49 } 50 51 Path2D::~Path2D() { 52 delete path_; 53 handle_.Reset(); 54 gGlobal->getIsolate()->AdjustAmountOfExternalAllocatedMemory(-sizeof(SkPath)); 55 } 56
