chrome/renderer/extensions/set_icon_natives.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/renderer/extensions/set_icon_natives.h"
   6
   7 #include <limits>
   8
   9 #include "base/memory/scoped_ptr.h"
  10 #include "chrome/common/render_messages.h"
  11 #include "chrome/renderer/extensions/request_sender.h"
  12 #include "third_party/skia/include/core/SkBitmap.h"
  13 #include "third_party/skia/include/core/SkColor.h"
  14
  15 namespace {
  16
  17 const char* kImageSizeKeys[] = { "19", "38" };
  18 const char kInvalidDimensions[] = "ImageData has invalid dimensions.";
  19 const char kInvalidData[] = "ImageData data length does not match dimensions.";
  20 const char kNoMemory[] = "Chrome was unable to initialize icon.";
  21
  22 }  // namespace
  23
  24 namespace extensions {
  25
  26 SetIconNatives::SetIconNatives(Dispatcher* dispatcher,
  27                                RequestSender* request_sender,
  28                                ChromeV8Context* context)
  29     : ChromeV8Extension(dispatcher, context),
  30       request_sender_(request_sender) {
  31   RouteFunction(
  32       "SetIconCommon",
  33       base::Bind(&SetIconNatives::SetIconCommon, base::Unretained(this)));
  34 }
  35
  36 bool SetIconNatives::ConvertImageDataToBitmapValue(
  37     const v8::Local<v8::Object> image_data,
  38     base::Value** bitmap_value) {
  39   v8::Isolate* isolate = context()->v8_context()->GetIsolate();
  40   v8::Local<v8::Object> data =
  41       image_data->Get(v8::String::NewFromUtf8(isolate, "data"))->ToObject();
  42   int width =
  43       image_data->Get(v8::String::NewFromUtf8(isolate, "width"))->Int32Value();
  44   int height =
  45       image_data->Get(v8::String::NewFromUtf8(isolate, "height"))->Int32Value();
  46
  47   if (width <= 0 || height <= 0) {
  48     isolate->ThrowException(v8::Exception::Error(
  49         v8::String::NewFromUtf8(isolate, kInvalidDimensions)));
  50     return false;
  51   }
  52
  53   // We need to be able to safely check |data_length| == 4 * width * height
  54   // without overflowing below.
  55   int max_width = (std::numeric_limits<int>::max() / 4) / height;
  56   if (width > max_width) {
  57     isolate->ThrowException(v8::Exception::Error(
  58         v8::String::NewFromUtf8(isolate, kInvalidDimensions)));
  59     return false;
  60   }
  61
  62   int data_length =
  63       data->Get(v8::String::NewFromUtf8(isolate, "length"))->Int32Value();
  64   if (data_length != 4 * width * height) {
  65     isolate->ThrowException(
  66         v8::Exception::Error(v8::String::NewFromUtf8(isolate, kInvalidData)));
  67     return false;
  68   }
  69
  70   SkBitmap bitmap;
  71   bitmap.setConfig(SkBitmap::kARGB_8888_Config, width, height);
  72   if (!bitmap.allocPixels()) {
  73     isolate->ThrowException(
  74         v8::Exception::Error(v8::String::NewFromUtf8(isolate, kNoMemory)));
  75     return false;
  76   }
  77   bitmap.eraseARGB(0, 0, 0, 0);
  78
  79   uint32_t* pixels = bitmap.getAddr32(0, 0);
  80   for (int t = 0; t < width*height; t++) {
  81     // |data| is RGBA, pixels is ARGB.
  82     pixels[t] = SkPreMultiplyColor(
  83         ((data->Get(v8::Integer::New(isolate, 4*t + 3))->Int32Value() & 0xFF)
  84          << 24) |
  85         ((data->Get(v8::Integer::New(isolate, 4*t + 0))->Int32Value() & 0xFF)
  86          << 16) |
  87         ((data->Get(v8::Integer::New(isolate, 4*t + 1))->Int32Value() & 0xFF)
  88          << 8) |
  89         ((data->Get(v8::Integer::New(isolate, 4*t + 2))->Int32Value() & 0xFF)
  90          << 0));
  91   }
  92
  93   // Construct the Value object.
  94   IPC::Message bitmap_pickle;
  95   IPC::WriteParam(&bitmap_pickle, bitmap);
  96   *bitmap_value = base::BinaryValue::CreateWithCopiedBuffer(
  97       static_cast<const char*>(bitmap_pickle.data()), bitmap_pickle.size());
  98
  99   return true;
 100 }
 101
 102 bool SetIconNatives::ConvertImageDataSetToBitmapValueSet(
 103     const v8::FunctionCallbackInfo<v8::Value>& args,
 104     base::DictionaryValue* bitmap_set_value) {
 105   v8::Local<v8::Object> extension_args = args[1]->ToObject();
 106   v8::Local<v8::Object> details = extension_args
 107       ->Get(v8::String::NewFromUtf8(args.GetIsolate(), "0"))->ToObject();
 108   v8::Local<v8::Object> image_data_set =
 109       details->Get(v8::String::NewFromUtf8(args.GetIsolate(), "imageData"))
 110           ->ToObject();
 111
 112   DCHECK(bitmap_set_value);
 113   for (size_t i = 0; i < arraysize(kImageSizeKeys); i++) {
 114     if (!image_data_set->Has(
 115             v8::String::NewFromUtf8(args.GetIsolate(), kImageSizeKeys[i])))
 116       continue;
 117     v8::Local<v8::Object> image_data = image_data_set
 118         ->Get(v8::String::NewFromUtf8(args.GetIsolate(), kImageSizeKeys[i]))
 119         ->ToObject();
 120     base::Value* image_data_bitmap = NULL;
 121     if (!ConvertImageDataToBitmapValue(image_data, &image_data_bitmap))
 122       return false;
 123     bitmap_set_value->Set(kImageSizeKeys[i], image_data_bitmap);
 124   }
 125   return true;
 126 }
 127
 128 void SetIconNatives::SetIconCommon(
 129     const v8::FunctionCallbackInfo<v8::Value>& args) {
 130   scoped_ptr<base::DictionaryValue> bitmap_set_value(
 131       new base::DictionaryValue());
 132   if (!ConvertImageDataSetToBitmapValueSet(args, bitmap_set_value.get()))
 133     return;
 134
 135   v8::Local<v8::Object> extension_args = args[1]->ToObject();
 136   v8::Local<v8::Object> details = extension_args
 137       ->Get(v8::String::NewFromUtf8(args.GetIsolate(), "0"))->ToObject();
 138
 139   base::DictionaryValue* dict = new base::DictionaryValue();
 140   dict->Set("imageData", bitmap_set_value.release());
 141
 142   if (details->Has(v8::String::NewFromUtf8(args.GetIsolate(), "tabId"))) {
 143     dict->SetInteger("tabId",
 144                      details->Get(v8::String::NewFromUtf8(
 145                          args.GetIsolate(), "tabId"))->Int32Value());
 146   }
 147
 148   base::ListValue list_value;
 149   list_value.Append(dict);
 150
 151   std::string name = *v8::String::Utf8Value(args[0]);
 152   int request_id = args[2]->Int32Value();
 153   bool has_callback = args[3]->BooleanValue();
 154   bool for_io_thread = args[4]->BooleanValue();
 155
 156   request_sender_->StartRequest(context(),
 157                                 name,
 158                                 request_id,
 159                                 has_callback,
 160                                 for_io_thread,
 161                                 &list_value);
 162 }
 163
 164 }  // namespace extensions