66 lines
2.3 KiB
C++
66 lines
2.3 KiB
C++
// Copyright (c) 2015 GitHub, Inc.
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// Use of this source code is governed by the MIT license that can be
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// found in the LICENSE file.
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#include "atom/renderer/node_array_buffer_bridge.h"
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#include "atom/common/node_includes.h"
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#include "base/macros.h"
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#include "native_mate/converter.h"
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#include "third_party/WebKit/public/web/WebArrayBuffer.h"
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#include "third_party/WebKit/public/web/WebArrayBufferConverter.h"
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namespace atom {
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namespace {
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// global.Uint8Array;
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v8::Local<v8::Function> GetUint8ArrayConstructor(
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v8::Isolate* isolate, v8::Local<v8::Context> context) {
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v8::Local<v8::Value> constructor = context->Global()->Get(
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mate::StringToV8(isolate, "Uint8Array"));
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return v8::Local<v8::Function>::Cast(constructor);
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}
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// new ArrayBuffer(size);
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v8::Local<v8::ArrayBuffer> BlinkArrayBufferNew(
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v8::Isolate* isolate, size_t size) {
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blink::WebArrayBuffer buffer = blink::WebArrayBuffer::create(size, 1);
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return v8::Local<v8::ArrayBuffer>::Cast(
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blink::WebArrayBufferConverter::toV8Value(
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&buffer, isolate->GetCurrentContext()->Global(), isolate));
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}
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// new ArrayBuffer(data, size);
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v8::Local<v8::ArrayBuffer> BlinkArrayBufferNewWith(
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v8::Isolate* isolate, void* data, size_t size) {
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blink::WebArrayBuffer buffer = blink::WebArrayBuffer::createExternal(
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data, size);
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return v8::Local<v8::ArrayBuffer>::Cast(
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blink::WebArrayBufferConverter::toV8Value(
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&buffer, isolate->GetCurrentContext()->Global(), isolate));
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}
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// new Uint8Array(array_buffer, offset, size);
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v8::Local<v8::Uint8Array> BlinkUint8ArrayNew(
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v8::Local<v8::ArrayBuffer> ab, size_t offset, size_t size) {
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// Use the DOM's Uint8Array constructor to create Uint8Array.
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v8::Local<v8::Context> context = ab->CreationContext();
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v8::Isolate* isolate = context->GetIsolate();
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v8::Local<v8::Function> constructor =
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GetUint8ArrayConstructor(isolate, context);
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v8::Local<v8::Value> args[] = {
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ab, mate::ConvertToV8(isolate, offset), mate::ConvertToV8(isolate, size)
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};
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return v8::Local<v8::Uint8Array>::Cast(constructor->NewInstance(
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context, node::arraysize(args), args).ToLocalChecked());
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}
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} // namespace
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void OverrideNodeArrayBuffer() {
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node::Buffer::SetArrayBufferCreator(
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BlinkArrayBufferNew, BlinkArrayBufferNewWith, BlinkUint8ArrayNew);
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}
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} // namespace atom
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