cc: Add rasterize and record micro benchmark.

cc/debug/rasterize_and_record_benchmark.cc

+// Copyright 2013 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 "cc/debug/rasterize_and_record_benchmark.h"
+
+#include <algorithm>
+#include <limits>
+
+#include "base/basictypes.h"
+#include "base/values.h"
+#include "cc/debug/rasterize_and_record_benchmark_impl.h"
+#include "cc/layers/layer.h"
+#include "cc/layers/picture_layer.h"
+#include "cc/trees/layer_tree_host.h"
+#include "cc/trees/layer_tree_host_common.h"
+#include "ui/gfx/rect.h"
+
+namespace cc {
+
+namespace {
+
+const int kTileGridSize = 512;
+const int kTileGridBorder = 1;
+
+const int kDefaultRecordRepeatCount = 100;
+
+base::TimeTicks Now() {
+  return base::TimeTicks::IsThreadNowSupported()
+             ? base::TimeTicks::ThreadNow()
+             : base::TimeTicks::HighResNow();
+}
+
+}  // namespace
+
+RasterizeAndRecordBenchmark::RasterizeAndRecordBenchmark(
+    scoped_ptr<base::Value> value,
+    const MicroBenchmark::DoneCallback& callback)
+    : MicroBenchmark(callback),
+      record_repeat_count_(kDefaultRecordRepeatCount),
+      settings_(value.Pass()),
+      main_thread_benchmark_done_(false) {
+  base::DictionaryValue* settings = NULL;
+  settings_->GetAsDictionary(&settings);
+  if (!settings)
+    return;
+
+  if (settings->HasKey("record_repeat_count"))
+    settings->GetInteger("record_repeat_count", &record_repeat_count_);
+}
+
+RasterizeAndRecordBenchmark::~RasterizeAndRecordBenchmark() {}
+
+void RasterizeAndRecordBenchmark::DidUpdateLayers(LayerTreeHost* host) {
+  LayerTreeHostCommon::CallFunctionForSubtree(
+      host->root_layer(),
+      base::Bind(&RasterizeAndRecordBenchmark::Run, base::Unretained(this)));
+
+  DCHECK(!results_.get());
+  results_ = make_scoped_ptr(new base::DictionaryValue);
+  results_->SetInteger("pixels_recorded", record_results_.pixels_recorded);
+  results_->SetDouble("record_time_ms",
+                      record_results_.total_best_time.InMillisecondsF());
+  main_thread_benchmark_done_ = true;
+}
+
+void RasterizeAndRecordBenchmark::RecordRasterResults(
+    scoped_ptr<base::Value> results_value) {
+  DCHECK(main_thread_benchmark_done_);
+
+  base::DictionaryValue* results = NULL;
+  results_value->GetAsDictionary(&results);
+
+  DCHECK(results);
+  DCHECK(results->HasKey("pixels_rasterized"));
+  DCHECK(results->HasKey("rasterize_time_ms"));
+
+  int pixels_rasterized;
+  results->GetInteger("pixels_rasterized", &pixels_rasterized);
+  double rasterize_time_ms;
+  results->GetDouble("rasterize_time_ms", &rasterize_time_ms);
+
+  results_->SetInteger("pixels_rasterized", pixels_rasterized);
+  results_->SetDouble("rasterize_time_ms", rasterize_time_ms);
+
+  NotifyDone(results_.PassAs<base::Value>());
+}
+
+scoped_ptr<MicroBenchmarkImpl> RasterizeAndRecordBenchmark::CreateBenchmarkImpl(
+    scoped_refptr<base::MessageLoopProxy> origin_loop) {
+  return scoped_ptr<MicroBenchmarkImpl>(new RasterizeAndRecordBenchmarkImpl(
+      origin_loop,
+      settings_.get(),
+      base::Bind(&RasterizeAndRecordBenchmark::RecordRasterResults,
+                 base::Unretained(this))));
+}
+
+void RasterizeAndRecordBenchmark::Run(Layer* layer) {
+  layer->RunMicroBenchmark(this);
+}
+
+void RasterizeAndRecordBenchmark::RunOnLayer(PictureLayer* layer) {
+  ContentLayerClient* painter = layer->client();
+  gfx::Size content_bounds = layer->content_bounds();
+
+  SkTileGridPicture::TileGridInfo tile_grid_info;
+  tile_grid_info.fTileInterval.set(kTileGridSize - 2 * kTileGridBorder,
+                                   kTileGridSize - 2 * kTileGridBorder);
+  tile_grid_info.fMargin.set(kTileGridBorder, kTileGridBorder);
+  tile_grid_info.fOffset.set(-kTileGridBorder, -kTileGridBorder);
+
+  gfx::Rect visible_content_rect = gfx::ScaleToEnclosingRect(
+      layer->visible_content_rect(), 1.f / layer->contents_scale_x());
+  if (visible_content_rect.IsEmpty())
+    return;
+
+  scoped_refptr<Picture> picture = Picture::Create(visible_content_rect);
+
+  base::TimeDelta min_time =
+      base::TimeDelta::FromInternalValue(std::numeric_limits<int64>::max());
+  for (int i = 0; i < record_repeat_count_; ++i) {
+    base::TimeTicks start = Now();
+    picture->Record(painter, tile_grid_info);
+    base::TimeTicks end = Now();
+    base::TimeDelta duration = end - start;
+    if (duration < min_time)
+      min_time = duration;
+  }
+
+  record_results_.pixels_recorded +=
+      visible_content_rect.width() * visible_content_rect.height();
+  record_results_.total_best_time += min_time;
+}
+
+RasterizeAndRecordBenchmark::RecordResults::RecordResults()
+    : pixels_recorded(0) {}
+
+RasterizeAndRecordBenchmark::RecordResults::~RecordResults() {}
+
+}  // namespace cc