// 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.

#ifndef CC_DEBUG_DEVTOOLS_INSTRUMENTATION_H_
#define CC_DEBUG_DEVTOOLS_INSTRUMENTATION_H_

#include <stdint.h>

#include <memory>

#include "base/macros.h"
#include "base/metrics/histogram_macros.h"
#include "base/trace_event/trace_event.h"
#include "base/trace_event/trace_event_argument.h"

namespace cc {
namespace devtools_instrumentation {

namespace internal {
const char kCategory[] = TRACE_DISABLED_BY_DEFAULT("devtools.timeline");
const char kCategoryFrame[] =
    TRACE_DISABLED_BY_DEFAULT("devtools.timeline.frame");
const char kData[] = "data";
const char kFrameId[] = "frameId";
const char kLayerId[] = "layerId";
const char kLayerTreeId[] = "layerTreeId";
const char kPixelRefId[] = "pixelRefId";

const char kImageDecodeTask[] = "ImageDecodeTask";
const char kBeginFrame[] = "BeginFrame";
const char kNeedsBeginFrameChanged[] = "NeedsBeginFrameChanged";
const char kActivateLayerTree[] = "ActivateLayerTree";
const char kRequestMainThreadFrame[] = "RequestMainThreadFrame";
const char kBeginMainThreadFrame[] = "BeginMainThreadFrame";
const char kDrawFrame[] = "DrawFrame";
const char kCompositeLayers[] = "CompositeLayers";
}  // namespace internal

const char kPaintSetup[] = "PaintSetup";
const char kUpdateLayer[] = "UpdateLayer";

class ScopedLayerTask {
 public:
  ScopedLayerTask(const char* event_name, int layer_id)
    : event_name_(event_name) {
    TRACE_EVENT_BEGIN1(internal::kCategory, event_name_,
        internal::kLayerId, layer_id);
  }
  ~ScopedLayerTask() {
    TRACE_EVENT_END0(internal::kCategory, event_name_);
  }
 private:
  const char* event_name_;

  DISALLOW_COPY_AND_ASSIGN(ScopedLayerTask);
};

class ScopedImageDecodeTask {
 public:
  enum Type { SOFTWARE, GPU };

  ScopedImageDecodeTask(const void* imagePtr, Type type)
      : type_(type), start_time_(base::TimeTicks::Now()) {
    TRACE_EVENT_BEGIN1(internal::kCategory, internal::kImageDecodeTask,
                       internal::kPixelRefId,
                       reinterpret_cast<uint64_t>(imagePtr));
  }
  ~ScopedImageDecodeTask() {
    TRACE_EVENT_END0(internal::kCategory, internal::kImageDecodeTask);
    base::TimeDelta duration = base::TimeTicks::Now() - start_time_;
    switch (type_) {
      case SOFTWARE:
        UMA_HISTOGRAM_COUNTS_1M("Renderer4.ImageDecodeTaskDurationUs.Software",
                                duration.InMicroseconds());
        break;
      case GPU:
        UMA_HISTOGRAM_COUNTS_1M("Renderer4.ImageDecodeTaskDurationUs.Gpu",
                                duration.InMicroseconds());
        break;
    }
  }

 private:
  const Type type_;
  const base::TimeTicks start_time_;
  DISALLOW_COPY_AND_ASSIGN(ScopedImageDecodeTask);
};

class ScopedLayerTreeTask {
 public:
  ScopedLayerTreeTask(const char* event_name,
                      int layer_id,
                      int layer_tree_host_id)
    : event_name_(event_name) {
    TRACE_EVENT_BEGIN2(internal::kCategory, event_name_,
        internal::kLayerId, layer_id,
        internal::kLayerTreeId, layer_tree_host_id);
  }
  ~ScopedLayerTreeTask() {
    TRACE_EVENT_END0(internal::kCategory, event_name_);
  }
 private:
  const char* event_name_;

  DISALLOW_COPY_AND_ASSIGN(ScopedLayerTreeTask);
};

struct ScopedCommitTrace {
 public:
  explicit ScopedCommitTrace(int layer_tree_host_id) {
    TRACE_EVENT_BEGIN1(internal::kCategory, internal::kCompositeLayers,
                       internal::kLayerTreeId, layer_tree_host_id);
  }
  ~ScopedCommitTrace() {
    TRACE_EVENT_END0(internal::kCategory, internal::kCompositeLayers);
  }

 private:
  DISALLOW_COPY_AND_ASSIGN(ScopedCommitTrace);
};

struct ScopedLayerObjectTracker
    : public base::trace_event::TraceScopedTrackableObject<int> {
  explicit ScopedLayerObjectTracker(int layer_id)
      : base::trace_event::TraceScopedTrackableObject<int>(
            internal::kCategory,
            internal::kLayerId,
            layer_id) {
  }

 private:
  DISALLOW_COPY_AND_ASSIGN(ScopedLayerObjectTracker);
};

inline void DidActivateLayerTree(int layer_tree_host_id, int frame_id) {
  TRACE_EVENT_INSTANT2(internal::kCategoryFrame,
                       internal::kActivateLayerTree,
                       TRACE_EVENT_SCOPE_THREAD,
                       internal::kLayerTreeId,
                       layer_tree_host_id,
                       internal::kFrameId,
                       frame_id);
}

inline void DidBeginFrame(int layer_tree_host_id) {
  TRACE_EVENT_INSTANT1(internal::kCategoryFrame,
                       internal::kBeginFrame,
                       TRACE_EVENT_SCOPE_THREAD,
                       internal::kLayerTreeId,
                       layer_tree_host_id);
}

inline void DidDrawFrame(int layer_tree_host_id) {
  TRACE_EVENT_INSTANT1(internal::kCategoryFrame,
                       internal::kDrawFrame,
                       TRACE_EVENT_SCOPE_THREAD,
                       internal::kLayerTreeId,
                       layer_tree_host_id);
}

inline void DidRequestMainThreadFrame(int layer_tree_host_id) {
  TRACE_EVENT_INSTANT1(internal::kCategoryFrame,
                       internal::kRequestMainThreadFrame,
                       TRACE_EVENT_SCOPE_THREAD,
                       internal::kLayerTreeId,
                       layer_tree_host_id);
}

inline std::unique_ptr<base::trace_event::ConvertableToTraceFormat>
BeginMainThreadFrameData(int frame_id) {
  std::unique_ptr<base::trace_event::TracedValue> value(
      new base::trace_event::TracedValue());
  value->SetInteger("frameId", frame_id);
  return std::move(value);
}

inline void WillBeginMainThreadFrame(int layer_tree_host_id, int frame_id) {
  TRACE_EVENT_INSTANT2(
      internal::kCategoryFrame, internal::kBeginMainThreadFrame,
      TRACE_EVENT_SCOPE_THREAD, internal::kLayerTreeId, layer_tree_host_id,
      internal::kData, BeginMainThreadFrameData(frame_id));
}

inline std::unique_ptr<base::trace_event::ConvertableToTraceFormat>
NeedsBeginFrameData(bool needs_begin_frame) {
  std::unique_ptr<base::trace_event::TracedValue> value(
      new base::trace_event::TracedValue());
  value->SetInteger("needsBeginFrame", needs_begin_frame);
  return std::move(value);
}

inline void NeedsBeginFrameChanged(int layer_tree_host_id, bool new_value) {
  TRACE_EVENT_INSTANT2(
      internal::kCategoryFrame, internal::kNeedsBeginFrameChanged,
      TRACE_EVENT_SCOPE_THREAD, internal::kLayerTreeId, layer_tree_host_id,
      internal::kData, NeedsBeginFrameData(new_value));
}

}  // namespace devtools_instrumentation
}  // namespace cc

#endif  // CC_DEBUG_DEVTOOLS_INSTRUMENTATION_H_