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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "extensions/renderer/set_icon_natives.h"
#include <stddef.h>
#include <stdint.h>
#include <limits>
#include <memory>
#include "base/macros.h"
#include "base/strings/string_number_conversions.h"
#include "content/public/common/common_param_traits.h"
#include "extensions/renderer/request_sender.h"
#include "extensions/renderer/script_context.h"
#include "ipc/ipc_message_utils.h"
#include "third_party/WebKit/public/web/WebArrayBufferConverter.h"
#include "third_party/skia/include/core/SkBitmap.h"
namespace {
const char kInvalidDimensions[] = "ImageData has invalid dimensions.";
const char kInvalidData[] = "ImageData data length does not match dimensions.";
const char kNoMemory[] = "Chrome was unable to initialize icon.";
} // namespace
namespace extensions {
SetIconNatives::SetIconNatives(ScriptContext* context)
: ObjectBackedNativeHandler(context) {
RouteFunction(
"SetIconCommon",
base::Bind(&SetIconNatives::SetIconCommon, base::Unretained(this)));
}
bool SetIconNatives::ConvertImageDataToBitmapValue(
const v8::Local<v8::Object> image_data,
v8::Local<v8::Value>* image_data_bitmap) {
v8::Isolate* isolate = context()->v8_context()->GetIsolate();
v8::Local<v8::Object> data =
image_data->Get(v8::String::NewFromUtf8(isolate, "data"))
->ToObject(isolate);
int width =
image_data->Get(v8::String::NewFromUtf8(isolate, "width"))->Int32Value();
int height =
image_data->Get(v8::String::NewFromUtf8(isolate, "height"))->Int32Value();
if (width <= 0 || height <= 0) {
isolate->ThrowException(v8::Exception::Error(
v8::String::NewFromUtf8(isolate, kInvalidDimensions)));
return false;
}
// We need to be able to safely check |data_length| == 4 * width * height
// without overflowing below.
int max_width = (std::numeric_limits<int>::max() / 4) / height;
if (width > max_width) {
isolate->ThrowException(v8::Exception::Error(
v8::String::NewFromUtf8(isolate, kInvalidDimensions)));
return false;
}
int data_length =
data->Get(v8::String::NewFromUtf8(isolate, "length"))->Int32Value();
if (data_length != 4 * width * height) {
isolate->ThrowException(
v8::Exception::Error(v8::String::NewFromUtf8(isolate, kInvalidData)));
return false;
}
SkBitmap bitmap;
if (!bitmap.tryAllocN32Pixels(width, height)) {
isolate->ThrowException(
v8::Exception::Error(v8::String::NewFromUtf8(isolate, kNoMemory)));
return false;
}
bitmap.eraseARGB(0, 0, 0, 0);
uint32_t* pixels = bitmap.getAddr32(0, 0);
for (int t = 0; t < width * height; t++) {
// |data| is RGBA, pixels is ARGB.
pixels[t] = SkPreMultiplyColor(
((data->Get(v8::Integer::New(isolate, 4 * t + 3))->Int32Value() & 0xFF)
<< 24) |
((data->Get(v8::Integer::New(isolate, 4 * t + 0))->Int32Value() & 0xFF)
<< 16) |
((data->Get(v8::Integer::New(isolate, 4 * t + 1))->Int32Value() & 0xFF)
<< 8) |
((data->Get(v8::Integer::New(isolate, 4 * t + 2))->Int32Value() & 0xFF)
<< 0));
}
// Construct the Value object.
IPC::Message bitmap_pickle;
IPC::WriteParam(&bitmap_pickle, bitmap);
blink::WebArrayBuffer buffer =
blink::WebArrayBuffer::create(bitmap_pickle.size(), 1);
memcpy(buffer.data(), bitmap_pickle.data(), bitmap_pickle.size());
*image_data_bitmap = blink::WebArrayBufferConverter::toV8Value(
&buffer, context()->v8_context()->Global(), isolate);
return true;
}
bool SetIconNatives::ConvertImageDataSetToBitmapValueSet(
v8::Local<v8::Object>& details,
v8::Local<v8::Object>* bitmap_set_value) {
v8::Isolate* isolate = context()->v8_context()->GetIsolate();
v8::Local<v8::Object> image_data_set =
details->Get(v8::String::NewFromUtf8(isolate, "imageData"))
->ToObject(isolate);
DCHECK(bitmap_set_value);
v8::Local<v8::Array> property_names(image_data_set->GetOwnPropertyNames());
for (size_t i = 0; i < property_names->Length(); ++i) {
v8::Local<v8::Value> key(property_names->Get(i));
v8::String::Utf8Value utf8_key(key);
int size;
if (!base::StringToInt(std::string(*utf8_key), &size))
continue;
v8::Local<v8::Object> image_data =
image_data_set->Get(key)->ToObject(isolate);
v8::Local<v8::Value> image_data_bitmap;
if (!ConvertImageDataToBitmapValue(image_data, &image_data_bitmap))
return false;
(*bitmap_set_value)->Set(key, image_data_bitmap);
}
return true;
}
void SetIconNatives::SetIconCommon(
const v8::FunctionCallbackInfo<v8::Value>& args) {
CHECK_EQ(1, args.Length());
CHECK(args[0]->IsObject());
v8::Local<v8::Object> details = args[0]->ToObject(args.GetIsolate());
v8::Local<v8::Object> bitmap_set_value(v8::Object::New(args.GetIsolate()));
if (!ConvertImageDataSetToBitmapValueSet(details, &bitmap_set_value))
return;
v8::Local<v8::Object> dict(v8::Object::New(args.GetIsolate()));
dict->Set(v8::String::NewFromUtf8(args.GetIsolate(), "imageData"),
bitmap_set_value);
if (details->Has(v8::String::NewFromUtf8(args.GetIsolate(), "tabId"))) {
dict->Set(
v8::String::NewFromUtf8(args.GetIsolate(), "tabId"),
details->Get(v8::String::NewFromUtf8(args.GetIsolate(), "tabId")));
}
args.GetReturnValue().Set(dict);
}
} // namespace extensions
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