src/content/renderer/gpu/gpu_benchmarking_extension.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 "content/renderer/gpu/gpu_benchmarking_extension.h"
   6
   7 #include <string>
   8
   9 #include "base/base64.h"
  10 #include "base/files/file_path.h"
  11 #include "base/files/file_util.h"
  12 #include "base/memory/scoped_vector.h"
  13 #include "base/strings/string_number_conversions.h"
  14 #include "cc/layers/layer.h"
  15 #include "content/common/input/synthetic_gesture_params.h"
  16 #include "content/common/input/synthetic_pinch_gesture_params.h"
  17 #include "content/common/input/synthetic_smooth_scroll_gesture_params.h"
  18 #include "content/common/input/synthetic_tap_gesture_params.h"
  19 #include "content/public/renderer/render_thread.h"
  20 #include "content/public/renderer/v8_value_converter.h"
  21 #include "content/renderer/gpu/render_widget_compositor.h"
  22 #include "content/renderer/render_thread_impl.h"
  23 #include "content/renderer/render_view_impl.h"
  24 #include "content/renderer/skia_benchmarking_extension.h"
  25 #include "third_party/WebKit/public/web/WebImageCache.h"
  26 #include "third_party/WebKit/public/web/WebLocalFrame.h"
  27 #include "third_party/WebKit/public/web/WebView.h"
  28 #include "third_party/skia/include/core/SkData.h"
  29 #include "third_party/skia/include/core/SkGraphics.h"
  30 #include "third_party/skia/include/core/SkPicture.h"
  31 #include "third_party/skia/include/core/SkPixelRef.h"
  32 #include "third_party/skia/include/core/SkStream.h"
  33 #include "ui/gfx/codec/png_codec.h"
  34 #include "v8/include/v8.h"
  35
  36 using blink::WebCanvas;
  37 using blink::WebLocalFrame;
  38 using blink::WebImageCache;
  39 using blink::WebPrivatePtr;
  40 using blink::WebSize;
  41 using blink::WebView;
  42
  43 const char kGpuBenchmarkingExtensionName[] = "v8/GpuBenchmarking";
  44
  45 // offset parameter is deprecated/ignored, and will be remove from the
  46 // signature in a future skia release. <reed@google.com>
  47 static SkData* EncodeBitmapToData(size_t* offset, const SkBitmap& bm) {
  48     SkPixelRef* pr = bm.pixelRef();
  49     if (pr != NULL) {
  50         SkData* data = pr->refEncodedData();
  51         if (data != NULL)
  52             return data;
  53     }
  54     std::vector<unsigned char> vector;
  55     if (gfx::PNGCodec::EncodeBGRASkBitmap(bm, false, &vector)) {
  56         return SkData::NewWithCopy(&vector.front() , vector.size());
  57     }
  58     return NULL;
  59 }
  60
  61 namespace {
  62
  63 class SkPictureSerializer {
  64  public:
  65   explicit SkPictureSerializer(const base::FilePath& dirpath)
  66       : dirpath_(dirpath),
  67         layer_id_(0) {
  68     // Let skia register known effect subclasses. This basically enables
  69     // reflection on those subclasses required for picture serialization.
  70     content::SkiaBenchmarking::Initialize();
  71   }
  72
  73   // Recursively serializes the layer tree.
  74   // Each layer in the tree is serialized into a separate skp file
  75   // in the given directory.
  76   void Serialize(const cc::Layer* layer) {
  77     const cc::LayerList& children = layer->children();
  78     for (size_t i = 0; i < children.size(); ++i) {
  79       Serialize(children[i].get());
  80     }
  81
  82     skia::RefPtr<SkPicture> picture = layer->GetPicture();
  83     if (!picture)
  84       return;
  85
  86     // Serialize picture to file.
  87     // TODO(alokp): Note that for this to work Chrome needs to be launched with
  88     // --no-sandbox command-line flag. Get rid of this limitation.
  89     // CRBUG: 139640.
  90     std::string filename = "layer_" + base::IntToString(layer_id_++) + ".skp";
  91     std::string filepath = dirpath_.AppendASCII(filename).MaybeAsASCII();
  92     DCHECK(!filepath.empty());
  93     SkFILEWStream file(filepath.c_str());
  94     DCHECK(file.isValid());
  95     picture->serialize(&file, &EncodeBitmapToData);
  96   }
  97
  98  private:
  99   base::FilePath dirpath_;
 100   int layer_id_;
 101 };
 102
 103 }  // namespace
 104
 105 namespace content {
 106
 107 namespace {
 108
 109 class CallbackAndContext : public base::RefCounted<CallbackAndContext> {
 110  public:
 111   CallbackAndContext(v8::Isolate* isolate,
 112                      v8::Handle<v8::Function> callback,
 113                      v8::Handle<v8::Context> context)
 114       : isolate_(isolate) {
 115     callback_.Reset(isolate_, callback);
 116     context_.Reset(isolate_, context);
 117   }
 118
 119   v8::Isolate* isolate() {
 120     return isolate_;
 121   }
 122
 123   v8::Handle<v8::Function> GetCallback() {
 124     return v8::Local<v8::Function>::New(isolate_, callback_);
 125   }
 126
 127   v8::Handle<v8::Context> GetContext() {
 128     return v8::Local<v8::Context>::New(isolate_, context_);
 129   }
 130
 131  private:
 132   friend class base::RefCounted<CallbackAndContext>;
 133
 134   virtual ~CallbackAndContext() {
 135     callback_.Reset();
 136     context_.Reset();
 137   }
 138
 139   v8::Isolate* isolate_;
 140   v8::Persistent<v8::Function> callback_;
 141   v8::Persistent<v8::Context> context_;
 142   DISALLOW_COPY_AND_ASSIGN(CallbackAndContext);
 143 };
 144
 145 class GpuBenchmarkingContext {
 146  public:
 147   GpuBenchmarkingContext()
 148       : web_frame_(NULL),
 149         web_view_(NULL),
 150         render_view_impl_(NULL),
 151         compositor_(NULL) {}
 152
 153   bool Init(bool init_compositor) {
 154     web_frame_ = WebLocalFrame::frameForCurrentContext();
 155     if (!web_frame_)
 156       return false;
 157
 158     web_view_ = web_frame_->view();
 159     if (!web_view_) {
 160       web_frame_ = NULL;
 161       return false;
 162     }
 163
 164     render_view_impl_ = RenderViewImpl::FromWebView(web_view_);
 165     if (!render_view_impl_) {
 166       web_frame_ = NULL;
 167       web_view_ = NULL;
 168       return false;
 169     }
 170
 171     if (!init_compositor)
 172       return true;
 173
 174     compositor_ = render_view_impl_->compositor();
 175     if (!compositor_) {
 176       web_frame_ = NULL;
 177       web_view_ = NULL;
 178       render_view_impl_ = NULL;
 179       return false;
 180     }
 181
 182     return true;
 183   }
 184
 185   WebLocalFrame* web_frame() const {
 186     DCHECK(web_frame_ != NULL);
 187     return web_frame_;
 188   }
 189   WebView* web_view() const {
 190     DCHECK(web_view_ != NULL);
 191     return web_view_;
 192   }
 193   RenderViewImpl* render_view_impl() const {
 194     DCHECK(render_view_impl_ != NULL);
 195     return render_view_impl_;
 196   }
 197   RenderWidgetCompositor* compositor() const {
 198     DCHECK(compositor_ != NULL);
 199     return compositor_;
 200   }
 201
 202  private:
 203   WebLocalFrame* web_frame_;
 204   WebView* web_view_;
 205   RenderViewImpl* render_view_impl_;
 206   RenderWidgetCompositor* compositor_;
 207
 208   DISALLOW_COPY_AND_ASSIGN(GpuBenchmarkingContext);
 209 };
 210
 211 }  // namespace
 212
 213 class GpuBenchmarkingWrapper : public v8::Extension {
 214  public:
 215   GpuBenchmarkingWrapper() :
 216       v8::Extension(kGpuBenchmarkingExtensionName,
 217             "if (typeof(chrome) == 'undefined') {"
 218             "  chrome = {};"
 219             "};"
 220             "if (typeof(chrome.gpuBenchmarking) == 'undefined') {"
 221             "  chrome.gpuBenchmarking = {};"
 222             "};"
 223             "chrome.gpuBenchmarking.setNeedsDisplayOnAllLayers = function() {"
 224             "  native function SetNeedsDisplayOnAllLayers();"
 225             "  return SetNeedsDisplayOnAllLayers();"
 226             "};"
 227             "chrome.gpuBenchmarking.setRasterizeOnlyVisibleContent = "
 228             "function() {"
 229             "  native function SetRasterizeOnlyVisibleContent();"
 230             "  return SetRasterizeOnlyVisibleContent();"
 231             "};"
 232             "chrome.gpuBenchmarking.printToSkPicture = function(dirname) {"
 233             "  native function PrintToSkPicture();"
 234             "  return PrintToSkPicture(dirname);"
 235             "};"
 236             "chrome.gpuBenchmarking.DEFAULT_INPUT = 0;"
 237             "chrome.gpuBenchmarking.TOUCH_INPUT = 1;"
 238             "chrome.gpuBenchmarking.MOUSE_INPUT = 2;"
 239             "chrome.gpuBenchmarking.gestureSourceTypeSupported = "
 240             "    function(gesture_source_type) {"
 241             "  native function GestureSourceTypeSupported();"
 242             "  return GestureSourceTypeSupported(gesture_source_type);"
 243             "};"
 244             "chrome.gpuBenchmarking.smoothScrollBy = "
 245             "    function(pixels_to_scroll, opt_callback, opt_start_x,"
 246             "             opt_start_y, opt_gesture_source_type,"
 247             "             opt_direction, opt_speed_in_pixels_s) {"
 248             "  pixels_to_scroll = pixels_to_scroll || 0;"
 249             "  callback = opt_callback || function() { };"
 250             "  gesture_source_type = opt_gesture_source_type ||"
 251             "      chrome.gpuBenchmarking.DEFAULT_INPUT;"
 252             "  direction = opt_direction || 'down';"
 253             "  speed_in_pixels_s = opt_speed_in_pixels_s || 800;"
 254             "  native function BeginSmoothScroll();"
 255             "  return BeginSmoothScroll(pixels_to_scroll, callback,"
 256             "                           gesture_source_type, direction,"
 257             "                           speed_in_pixels_s, true,"
 258             "                           opt_start_x, opt_start_y);"
 259             "};"
 260             "chrome.gpuBenchmarking.swipe = "
 261             "    function(direction, distance, opt_callback,"
 262             "             opt_start_x, opt_start_y,"
 263             "             opt_speed_in_pixels_s) {"
 264             "  direction = direction || 'up';"
 265             "  distance = distance || 0;"
 266             "  callback = opt_callback || function() { };"
 267             "  speed_in_pixels_s = opt_speed_in_pixels_s || 800;"
 268             "  native function BeginSmoothScroll();"
 269             "  return BeginSmoothScroll(-distance, callback,"
 270             "                           chrome.gpuBenchmarking.TOUCH_INPUT,"
 271             "                           direction, speed_in_pixels_s, false,"
 272             "                           opt_start_x, opt_start_y);"
 273             "};"
 274             "chrome.gpuBenchmarking.scrollBounce = "
 275             "    function(direction, distance, overscroll, opt_repeat_count,"
 276             "             opt_callback, opt_start_x, opt_start_y,"
 277             "             opt_speed_in_pixels_s) {"
 278             "  direction = direction || 'down';"
 279             "  distance = distance || 0;"
 280             "  overscroll = overscroll || 0;"
 281             "  repeat_count = opt_repeat_count || 1;"
 282             "  callback = opt_callback || function() { };"
 283             "  speed_in_pixels_s = opt_speed_in_pixels_s || 800;"
 284             "  native function BeginScrollBounce();"
 285             "  return BeginScrollBounce(direction, distance, overscroll,"
 286             "                           repeat_count, callback,"
 287             "                           speed_in_pixels_s,"
 288             "                           opt_start_x, opt_start_y);"
 289             "};"
 290             // TODO(dominikg): Remove once JS interface changes have rolled into
 291             //                 stable.
 292             "chrome.gpuBenchmarking.newPinchInterface = true;"
 293             "chrome.gpuBenchmarking.pinchBy = "
 294             "    function(scale_factor, anchor_x, anchor_y,"
 295             "             opt_callback, "
 296             "opt_relative_pointer_speed_in_pixels_s) {"
 297             "  callback = opt_callback || function() { };"
 298             "  relative_pointer_speed_in_pixels_s ="
 299             "      opt_relative_pointer_speed_in_pixels_s || 800;"
 300             "  native function BeginPinch();"
 301             "  return BeginPinch(scale_factor, anchor_x, anchor_y, callback,"
 302             "                    relative_pointer_speed_in_pixels_s);"
 303             "};"
 304             "chrome.gpuBenchmarking.tap = "
 305             "    function(position_x, position_y, opt_callback, "
 306             "opt_duration_ms,"
 307             "             opt_gesture_source_type) {"
 308             "  callback = opt_callback || function() { };"
 309             "  duration_ms = opt_duration_ms || 50;"
 310             "  gesture_source_type = opt_gesture_source_type ||"
 311             "      chrome.gpuBenchmarking.DEFAULT_INPUT;"
 312             "  native function BeginTap();"
 313             "  return BeginTap(position_x, position_y, callback, duration_ms,"
 314             "                  gesture_source_type);"
 315             "};"
 316             "chrome.gpuBenchmarking.beginWindowSnapshotPNG = "
 317             "function(callback) {"
 318             "  native function BeginWindowSnapshotPNG();"
 319             "  BeginWindowSnapshotPNG(callback);"
 320             "};"
 321             "chrome.gpuBenchmarking.clearImageCache = function() {"
 322             "  native function ClearImageCache();"
 323             "  ClearImageCache();"
 324             "};"
 325             "chrome.gpuBenchmarking.runMicroBenchmark ="
 326             "    function(name, callback, opt_arguments) {"
 327             "  arguments = opt_arguments || {};"
 328             "  native function RunMicroBenchmark();"
 329             "  return RunMicroBenchmark(name, callback, arguments);"
 330             "};"
 331             "chrome.gpuBenchmarking.sendMessageToMicroBenchmark ="
 332             "    function(id, arguments) {"
 333             "  native function SendMessageToMicroBenchmark();"
 334             "  return SendMessageToMicroBenchmark(id, arguments);"
 335             "};"
 336             "chrome.gpuBenchmarking.hasGpuProcess = function() {"
 337             "  native function HasGpuProcess();"
 338             "  return HasGpuProcess();"
 339             "};") {}
 340
 341   virtual v8::Handle<v8::FunctionTemplate> GetNativeFunctionTemplate(
 342       v8::Isolate* isolate,
 343       v8::Handle<v8::String> name) OVERRIDE {
 344     if (name->Equals(
 345             v8::String::NewFromUtf8(isolate, "SetNeedsDisplayOnAllLayers")))
 346       return v8::FunctionTemplate::New(isolate, SetNeedsDisplayOnAllLayers);
 347     if (name->Equals(
 348             v8::String::NewFromUtf8(isolate, "SetRasterizeOnlyVisibleContent")))
 349       return v8::FunctionTemplate::New(isolate, SetRasterizeOnlyVisibleContent);
 350     if (name->Equals(v8::String::NewFromUtf8(isolate, "PrintToSkPicture")))
 351       return v8::FunctionTemplate::New(isolate, PrintToSkPicture);
 352     if (name->Equals(
 353             v8::String::NewFromUtf8(isolate, "GestureSourceTypeSupported")))
 354       return v8::FunctionTemplate::New(isolate, GestureSourceTypeSupported);
 355     if (name->Equals(v8::String::NewFromUtf8(isolate, "BeginSmoothScroll")))
 356       return v8::FunctionTemplate::New(isolate, BeginSmoothScroll);
 357     if (name->Equals(v8::String::NewFromUtf8(isolate, "BeginScrollBounce")))
 358       return v8::FunctionTemplate::New(isolate, BeginScrollBounce);
 359     if (name->Equals(v8::String::NewFromUtf8(isolate, "BeginPinch")))
 360       return v8::FunctionTemplate::New(isolate, BeginPinch);
 361     if (name->Equals(v8::String::NewFromUtf8(isolate, "BeginTap")))
 362       return v8::FunctionTemplate::New(isolate, BeginTap);
 363     if (name->Equals(
 364             v8::String::NewFromUtf8(isolate, "BeginWindowSnapshotPNG")))
 365       return v8::FunctionTemplate::New(isolate, BeginWindowSnapshotPNG);
 366     if (name->Equals(v8::String::NewFromUtf8(isolate, "ClearImageCache")))
 367       return v8::FunctionTemplate::New(isolate, ClearImageCache);
 368     if (name->Equals(v8::String::NewFromUtf8(isolate, "RunMicroBenchmark")))
 369       return v8::FunctionTemplate::New(isolate, RunMicroBenchmark);
 370     if (name->Equals(
 371             v8::String::NewFromUtf8(isolate, "SendMessageToMicroBenchmark")))
 372       return v8::FunctionTemplate::New(isolate, SendMessageToMicroBenchmark);
 373     if (name->Equals(v8::String::NewFromUtf8(isolate, "HasGpuProcess")))
 374       return v8::FunctionTemplate::New(isolate, HasGpuProcess);
 375
 376     return v8::Handle<v8::FunctionTemplate>();
 377   }
 378
 379   static void SetNeedsDisplayOnAllLayers(
 380       const v8::FunctionCallbackInfo<v8::Value>& args) {
 381     GpuBenchmarkingContext context;
 382     if (!context.Init(true))
 383       return;
 384
 385     context.compositor()->SetNeedsDisplayOnAllLayers();
 386   }
 387
 388   static void SetRasterizeOnlyVisibleContent(
 389       const v8::FunctionCallbackInfo<v8::Value>& args) {
 390     GpuBenchmarkingContext context;
 391     if (!context.Init(true))
 392       return;
 393
 394     context.compositor()->SetRasterizeOnlyVisibleContent();
 395   }
 396
 397   static void PrintToSkPicture(
 398       const v8::FunctionCallbackInfo<v8::Value>& args) {
 399     if (args.Length() != 1)
 400       return;
 401
 402     v8::String::Utf8Value dirname(args[0]);
 403     if (dirname.length() == 0)
 404       return;
 405
 406     GpuBenchmarkingContext context;
 407     if (!context.Init(true))
 408       return;
 409
 410     const cc::Layer* root_layer = context.compositor()->GetRootLayer();
 411     if (!root_layer)
 412       return;
 413
 414     base::FilePath dirpath(
 415         base::FilePath::StringType(*dirname, *dirname + dirname.length()));
 416     if (!base::CreateDirectory(dirpath) ||
 417         !base::PathIsWritable(dirpath)) {
 418       std::string msg("Path is not writable: ");
 419       msg.append(dirpath.MaybeAsASCII());
 420       v8::Isolate* isolate = args.GetIsolate();
 421       isolate->ThrowException(v8::Exception::Error(v8::String::NewFromUtf8(
 422           isolate, msg.c_str(), v8::String::kNormalString, msg.length())));
 423       return;
 424     }
 425
 426     SkPictureSerializer serializer(dirpath);
 427     serializer.Serialize(root_layer);
 428   }
 429
 430   static void OnSyntheticGestureCompleted(
 431       CallbackAndContext* callback_and_context) {
 432     v8::Isolate* isolate = callback_and_context->isolate();
 433     v8::HandleScope scope(isolate);
 434     v8::Handle<v8::Context> context = callback_and_context->GetContext();
 435     v8::Context::Scope context_scope(context);
 436     WebLocalFrame* frame = WebLocalFrame::frameForContext(context);
 437     if (frame) {
 438       frame->callFunctionEvenIfScriptDisabled(
 439           callback_and_context->GetCallback(),
 440           v8::Object::New(isolate),
 441           0,
 442           NULL);
 443     }
 444   }
 445
 446   static void GestureSourceTypeSupported(
 447       const v8::FunctionCallbackInfo<v8::Value>& args) {
 448     if (args.Length() != 1 || !args[0]->IsNumber()) {
 449       args.GetReturnValue().Set(false);
 450       return;
 451     }
 452
 453     int gesture_source_type = args[0]->IntegerValue();
 454     if (gesture_source_type < 0 ||
 455         gesture_source_type > SyntheticGestureParams::GESTURE_SOURCE_TYPE_MAX) {
 456       args.GetReturnValue().Set(false);
 457       return;
 458     }
 459
 460     bool is_supported = SyntheticGestureParams::IsGestureSourceTypeSupported(
 461         static_cast<SyntheticGestureParams::GestureSourceType>(
 462             gesture_source_type));
 463     args.GetReturnValue().Set(is_supported);
 464   }
 465
 466   static void BeginSmoothScroll(
 467       const v8::FunctionCallbackInfo<v8::Value>& args) {
 468     GpuBenchmarkingContext context;
 469     if (!context.Init(false))
 470       return;
 471
 472     // The last two arguments can be undefined. We check their validity later.
 473     int arglen = args.Length();
 474     if (arglen < 8 ||
 475         !args[0]->IsNumber() ||
 476         !args[1]->IsFunction() ||
 477         !args[2]->IsNumber() ||
 478         !args[3]->IsString() ||
 479         !args[4]->IsNumber() ||
 480         !args[5]->IsBoolean()) {
 481       args.GetReturnValue().Set(false);
 482       return;
 483     }
 484
 485     v8::Local<v8::Function> callback_local =
 486         v8::Local<v8::Function>::Cast(args[1]);
 487
 488     scoped_refptr<CallbackAndContext> callback_and_context =
 489         new CallbackAndContext(args.GetIsolate(),
 490                                callback_local,
 491                                context.web_frame()->mainWorldScriptContext());
 492
 493     scoped_ptr<SyntheticSmoothScrollGestureParams> gesture_params(
 494         new SyntheticSmoothScrollGestureParams);
 495
 496     // Convert coordinates from CSS pixels to density independent pixels (DIPs).
 497     float page_scale_factor = context.web_view()->pageScaleFactor();
 498
 499     int gesture_source_type = args[2]->IntegerValue();
 500     if (gesture_source_type < 0 ||
 501         gesture_source_type > SyntheticGestureParams::GESTURE_SOURCE_TYPE_MAX) {
 502       args.GetReturnValue().Set(false);
 503       return;
 504     }
 505     gesture_params->gesture_source_type =
 506         static_cast<SyntheticGestureParams::GestureSourceType>(
 507             gesture_source_type);
 508
 509     gesture_params->speed_in_pixels_s = args[4]->IntegerValue();
 510     gesture_params->prevent_fling = args[5]->BooleanValue();
 511
 512     // Account for the 2 optional arguments, start_x and start_y.
 513     gfx::Point anchor;
 514     if (args[6]->IsUndefined() || args[7]->IsUndefined()) {
 515       blink::WebRect rect = context.render_view_impl()->windowRect();
 516       anchor.SetPoint(rect.width / 2, rect.height / 2);
 517     } else if (args[6]->IsNumber() && args[7]->IsNumber()) {
 518       anchor.SetPoint(args[6]->IntegerValue() * page_scale_factor,
 519                       args[7]->IntegerValue() * page_scale_factor);
 520     } else {
 521       args.GetReturnValue().Set(false);
 522       return;
 523     }
 524     gesture_params->anchor = anchor;
 525
 526     int distance_length = args[0]->IntegerValue() * page_scale_factor;
 527     gfx::Vector2d distance;
 528     v8::String::Utf8Value direction(args[3]);
 529     DCHECK(*direction);
 530     std::string direction_str(*direction);
 531     if (direction_str == "down")
 532       distance.set_y(-distance_length);
 533     else if (direction_str == "up")
 534       distance.set_y(distance_length);
 535     else if (direction_str == "right")
 536       distance.set_x(-distance_length);
 537     else if (direction_str == "left")
 538       distance.set_x(distance_length);
 539     else {
 540       args.GetReturnValue().Set(false);
 541       return;
 542     }
 543     gesture_params->distances.push_back(distance);
 544
 545     // TODO(nduca): If the render_view_impl is destroyed while the gesture is in
 546     // progress, we will leak the callback and context. This needs to be fixed,
 547     // somehow.
 548     context.render_view_impl()->QueueSyntheticGesture(
 549         gesture_params.PassAs<SyntheticGestureParams>(),
 550         base::Bind(&OnSyntheticGestureCompleted,
 551                    callback_and_context));
 552
 553     args.GetReturnValue().Set(true);
 554   }
 555
 556   static void BeginScrollBounce(
 557       const v8::FunctionCallbackInfo<v8::Value>& args) {
 558     GpuBenchmarkingContext context;
 559     if (!context.Init(false))
 560       return;
 561
 562     // The last two arguments can be undefined. We check their validity later.
 563     int arglen = args.Length();
 564     if (arglen < 8 ||
 565         !args[0]->IsString() ||
 566         !args[1]->IsNumber() ||
 567         !args[2]->IsNumber() ||
 568         !args[3]->IsNumber() ||
 569         !args[4]->IsFunction() ||
 570         !args[5]->IsNumber()) {
 571       args.GetReturnValue().Set(false);
 572       return;
 573     }
 574
 575     v8::Local<v8::Function> callback_local =
 576         v8::Local<v8::Function>::Cast(args[4]);
 577
 578     scoped_refptr<CallbackAndContext> callback_and_context =
 579         new CallbackAndContext(args.GetIsolate(),
 580                                callback_local,
 581                                context.web_frame()->mainWorldScriptContext());
 582
 583     scoped_ptr<SyntheticSmoothScrollGestureParams> gesture_params(
 584         new SyntheticSmoothScrollGestureParams);
 585
 586     // Convert coordinates from CSS pixels to density independent pixels (DIPs).
 587     float page_scale_factor = context.web_view()->pageScaleFactor();
 588
 589     gesture_params->speed_in_pixels_s = args[5]->IntegerValue();
 590
 591     // Account for the 2 optional arguments, start_x and start_y.
 592     gfx::Point start;
 593     if (args[6]->IsUndefined() || args[7]->IsUndefined()) {
 594       blink::WebRect rect = context.render_view_impl()->windowRect();
 595       start.SetPoint(rect.width / 2, rect.height / 2);
 596     } else if (args[6]->IsNumber() && args[7]->IsNumber()) {
 597       start.SetPoint(args[6]->IntegerValue() * page_scale_factor,
 598                      args[7]->IntegerValue() * page_scale_factor);
 599     } else {
 600       args.GetReturnValue().Set(false);
 601       return;
 602     }
 603
 604     int distance_length = args[1]->IntegerValue() * page_scale_factor;
 605     int overscroll_length = args[2]->IntegerValue() * page_scale_factor;
 606     gfx::Vector2d distance;
 607     gfx::Vector2d overscroll;
 608     v8::String::Utf8Value direction(args[0]);
 609     DCHECK(*direction);
 610     std::string direction_str(*direction);
 611     if (direction_str == "down") {
 612       distance.set_y(-distance_length);
 613       overscroll.set_y(overscroll_length);
 614     }
 615     else if (direction_str == "up") {
 616       distance.set_y(distance_length);
 617       overscroll.set_y(-overscroll_length);
 618     }
 619     else if (direction_str == "right") {
 620       distance.set_x(-distance_length);
 621       overscroll.set_x(overscroll_length);
 622     }
 623     else if (direction_str == "left") {
 624       distance.set_x(distance_length);
 625       overscroll.set_x(-overscroll_length);
 626     }
 627     else {
 628       args.GetReturnValue().Set(false);
 629       return;
 630     }
 631
 632     int repeat_count = args[3]->IntegerValue();
 633     gesture_params->anchor = start;
 634     for (int i = 0; i < repeat_count; i++) {
 635       gesture_params->distances.push_back(distance);
 636       gesture_params->distances.push_back(-distance + overscroll);
 637     }
 638
 639     // TODO(nduca): If the render_view_impl is destroyed while the gesture is in
 640     // progress, we will leak the callback and context. This needs to be fixed,
 641     // somehow.
 642     context.render_view_impl()->QueueSyntheticGesture(
 643         gesture_params.PassAs<SyntheticGestureParams>(),
 644         base::Bind(&OnSyntheticGestureCompleted,
 645                    callback_and_context));
 646
 647     args.GetReturnValue().Set(true);
 648   }
 649
 650   static void BeginPinch(
 651       const v8::FunctionCallbackInfo<v8::Value>& args) {
 652     GpuBenchmarkingContext context;
 653     if (!context.Init(false))
 654       return;
 655
 656     int arglen = args.Length();
 657     if (arglen < 5 ||
 658         !args[0]->IsNumber() ||
 659         !args[1]->IsNumber() ||
 660         !args[2]->IsNumber() ||
 661         !args[3]->IsFunction() ||
 662         !args[4]->IsNumber()) {
 663       args.GetReturnValue().Set(false);
 664       return;
 665     }
 666
 667     scoped_ptr<SyntheticPinchGestureParams> gesture_params(
 668         new SyntheticPinchGestureParams);
 669
 670     // Convert coordinates from CSS pixels to density independent pixels (DIPs).
 671     float page_scale_factor = context.web_view()->pageScaleFactor();
 672
 673     gesture_params->scale_factor = args[0]->NumberValue();
 674     gesture_params->anchor.SetPoint(
 675         args[1]->IntegerValue() * page_scale_factor,
 676         args[2]->IntegerValue() * page_scale_factor);
 677     gesture_params->relative_pointer_speed_in_pixels_s =
 678         args[4]->IntegerValue();
 679
 680     v8::Local<v8::Function> callback_local =
 681         v8::Local<v8::Function>::Cast(args[3]);
 682
 683     scoped_refptr<CallbackAndContext> callback_and_context =
 684         new CallbackAndContext(args.GetIsolate(),
 685                                callback_local,
 686                                context.web_frame()->mainWorldScriptContext());
 687
 688
 689     // TODO(nduca): If the render_view_impl is destroyed while the gesture is in
 690     // progress, we will leak the callback and context. This needs to be fixed,
 691     // somehow.
 692     context.render_view_impl()->QueueSyntheticGesture(
 693         gesture_params.PassAs<SyntheticGestureParams>(),
 694         base::Bind(&OnSyntheticGestureCompleted,
 695                    callback_and_context));
 696
 697     args.GetReturnValue().Set(true);
 698   }
 699
 700   static void BeginTap(
 701       const v8::FunctionCallbackInfo<v8::Value>& args) {
 702     GpuBenchmarkingContext context;
 703     if (!context.Init(false))
 704       return;
 705
 706     int arglen = args.Length();
 707     if (arglen < 5 ||
 708         !args[0]->IsNumber() ||
 709         !args[1]->IsNumber() ||
 710         !args[2]->IsFunction() ||
 711         !args[3]->IsNumber() ||
 712         !args[4]->IsNumber()) {
 713       args.GetReturnValue().Set(false);
 714       return;
 715     }
 716
 717     scoped_ptr<SyntheticTapGestureParams> gesture_params(
 718         new SyntheticTapGestureParams);
 719
 720     // Convert coordinates from CSS pixels to density independent pixels (DIPs).
 721     float page_scale_factor = context.web_view()->pageScaleFactor();
 722
 723     gesture_params->position.SetPoint(
 724         args[0]->IntegerValue() * page_scale_factor,
 725         args[1]->IntegerValue() * page_scale_factor);
 726     gesture_params->duration_ms = args[3]->IntegerValue();
 727
 728     int gesture_source_type = args[4]->IntegerValue();
 729     if (gesture_source_type < 0 ||
 730         gesture_source_type > SyntheticGestureParams::GESTURE_SOURCE_TYPE_MAX) {
 731       args.GetReturnValue().Set(false);
 732       return;
 733     }
 734     gesture_params->gesture_source_type =
 735         static_cast<SyntheticGestureParams::GestureSourceType>(
 736             gesture_source_type);
 737
 738     v8::Local<v8::Function> callback_local =
 739         v8::Local<v8::Function>::Cast(args[2]);
 740
 741     scoped_refptr<CallbackAndContext> callback_and_context =
 742         new CallbackAndContext(args.GetIsolate(),
 743                                callback_local,
 744                                context.web_frame()->mainWorldScriptContext());
 745
 746
 747     // TODO(nduca): If the render_view_impl is destroyed while the gesture is in
 748     // progress, we will leak the callback and context. This needs to be fixed,
 749     // somehow.
 750     context.render_view_impl()->QueueSyntheticGesture(
 751         gesture_params.PassAs<SyntheticGestureParams>(),
 752         base::Bind(&OnSyntheticGestureCompleted,
 753                    callback_and_context));
 754
 755     args.GetReturnValue().Set(true);
 756   }
 757
 758   static void OnSnapshotCompleted(CallbackAndContext* callback_and_context,
 759                                   const gfx::Size& size,
 760                                   const std::vector<unsigned char>& png) {
 761     v8::Isolate* isolate = callback_and_context->isolate();
 762     v8::HandleScope scope(isolate);
 763     v8::Handle<v8::Context> context = callback_and_context->GetContext();
 764     v8::Context::Scope context_scope(context);
 765     WebLocalFrame* frame = WebLocalFrame::frameForContext(context);
 766     if (frame) {
 767
 768       v8::Handle<v8::Value> result;
 769
 770       if(!size.IsEmpty()) {
 771         v8::Handle<v8::Object> result_object;
 772         result_object = v8::Object::New(isolate);
 773
 774         result_object->Set(v8::String::NewFromUtf8(isolate, "width"),
 775                            v8::Number::New(isolate, size.width()));
 776         result_object->Set(v8::String::NewFromUtf8(isolate, "height"),
 777                            v8::Number::New(isolate, size.height()));
 778
 779         std::string base64_png;
 780         base::Base64Encode(base::StringPiece(
 781             reinterpret_cast<const char*>(&*png.begin()), png.size()),
 782             &base64_png);
 783
 784         result_object->Set(v8::String::NewFromUtf8(isolate, "data"),
 785                            v8::String::NewFromUtf8(isolate,
 786                                                    base64_png.c_str(),
 787                                                    v8::String::kNormalString,
 788                                                    base64_png.size()));
 789
 790         result = result_object;
 791       } else {
 792         result = v8::Null(isolate);
 793       }
 794
 795       v8::Handle<v8::Value> argv[] = { result };
 796
 797       frame->callFunctionEvenIfScriptDisabled(
 798           callback_and_context->GetCallback(),
 799           v8::Object::New(isolate),
 800           1,
 801           argv);
 802     }
 803   }
 804
 805   static void BeginWindowSnapshotPNG(
 806       const v8::FunctionCallbackInfo<v8::Value>& args) {
 807     GpuBenchmarkingContext context;
 808     if (!context.Init(false))
 809       return;
 810
 811     if (!args[0]->IsFunction())
 812       return;
 813
 814     v8::Local<v8::Function> callback_local =
 815         v8::Local<v8::Function>::Cast(args[0]);
 816
 817     scoped_refptr<CallbackAndContext> callback_and_context =
 818         new CallbackAndContext(args.GetIsolate(),
 819                                callback_local,
 820                                context.web_frame()->mainWorldScriptContext());
 821
 822     context.render_view_impl()->GetWindowSnapshot(
 823         base::Bind(&OnSnapshotCompleted, callback_and_context));
 824   }
 825
 826   static void ClearImageCache(
 827       const v8::FunctionCallbackInfo<v8::Value>& args) {
 828     WebImageCache::clear();
 829   }
 830
 831   static void OnMicroBenchmarkCompleted(
 832       CallbackAndContext* callback_and_context,
 833       scoped_ptr<base::Value> result) {
 834     v8::Isolate* isolate = callback_and_context->isolate();
 835     v8::HandleScope scope(isolate);
 836     v8::Handle<v8::Context> context = callback_and_context->GetContext();
 837     v8::Context::Scope context_scope(context);
 838     WebLocalFrame* frame = WebLocalFrame::frameForContext(context);
 839     if (frame) {
 840       scoped_ptr<V8ValueConverter> converter =
 841           make_scoped_ptr(V8ValueConverter::create());
 842       v8::Handle<v8::Value> value = converter->ToV8Value(result.get(), context);
 843       v8::Handle<v8::Value> argv[] = { value };
 844
 845       frame->callFunctionEvenIfScriptDisabled(
 846           callback_and_context->GetCallback(),
 847           v8::Object::New(isolate),
 848           1,
 849           argv);
 850     }
 851   }
 852
 853   static void RunMicroBenchmark(
 854       const v8::FunctionCallbackInfo<v8::Value>& args) {
 855     GpuBenchmarkingContext context;
 856     if (!context.Init(true)) {
 857       args.GetReturnValue().Set(0);
 858       return;
 859     }
 860
 861     if (args.Length() != 3 ||
 862         !args[0]->IsString() ||
 863         !args[1]->IsFunction() ||
 864         !args[2]->IsObject()) {
 865       args.GetReturnValue().Set(0);
 866       return;
 867     }
 868
 869     v8::Local<v8::Function> callback_local =
 870         v8::Local<v8::Function>::Cast(args[1]);
 871
 872     scoped_refptr<CallbackAndContext> callback_and_context =
 873         new CallbackAndContext(args.GetIsolate(),
 874                                callback_local,
 875                                context.web_frame()->mainWorldScriptContext());
 876
 877     scoped_ptr<V8ValueConverter> converter =
 878         make_scoped_ptr(V8ValueConverter::create());
 879     v8::Handle<v8::Context> v8_context = callback_and_context->GetContext();
 880     scoped_ptr<base::Value> value =
 881         make_scoped_ptr(converter->FromV8Value(args[2], v8_context));
 882
 883     v8::String::Utf8Value benchmark(args[0]);
 884     DCHECK(*benchmark);
 885     args.GetReturnValue().Set(context.compositor()->ScheduleMicroBenchmark(
 886         std::string(*benchmark),
 887         value.Pass(),
 888         base::Bind(&OnMicroBenchmarkCompleted, callback_and_context)));
 889   }
 890
 891   static void SendMessageToMicroBenchmark(
 892       const v8::FunctionCallbackInfo<v8::Value>& args) {
 893     GpuBenchmarkingContext context;
 894     if (!context.Init(true)) {
 895       args.GetReturnValue().Set(0);
 896       return;
 897     }
 898
 899     if (args.Length() != 2 || !args[0]->IsNumber() || !args[1]->IsObject()) {
 900       args.GetReturnValue().Set(0);
 901       return;
 902     }
 903
 904     scoped_ptr<V8ValueConverter> converter =
 905         make_scoped_ptr(V8ValueConverter::create());
 906     v8::Handle<v8::Context> v8_context =
 907         context.web_frame()->mainWorldScriptContext();
 908     scoped_ptr<base::Value> value =
 909         make_scoped_ptr(converter->FromV8Value(args[1], v8_context));
 910
 911     int id = 0;
 912     converter->FromV8Value(args[0], v8_context)->GetAsInteger(&id);
 913     args.GetReturnValue().Set(
 914         context.compositor()->SendMessageToMicroBenchmark(id, value.Pass()));
 915   }
 916
 917   static void HasGpuProcess(const v8::FunctionCallbackInfo<v8::Value>& args) {
 918     GpuChannelHost* gpu_channel = RenderThreadImpl::current()->GetGpuChannel();
 919     args.GetReturnValue().Set(!!gpu_channel);
 920   }
 921 };
 922
 923 v8::Extension* GpuBenchmarkingExtension::Get() {
 924   return new GpuBenchmarkingWrapper();
 925 }
 926
 927 }  // namespace content