// Copyright 2012 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 <stddef.h>

#include "cc/test/begin_frame_args_test.h"
#include "cc/test/fake_layer_tree_host_impl.h"
#include "cc/test/test_shared_bitmap_manager.h"
#include "cc/trees/layer_tree_impl.h"

namespace cc {

FakeLayerTreeHostImpl::FakeLayerTreeHostImpl(
    TaskRunnerProvider* task_runner_provider,
    SharedBitmapManager* manager,
    TaskGraphRunner* task_graph_runner)
    : FakeLayerTreeHostImpl(LayerTreeSettings(),
                            task_runner_provider,
                            manager,
                            task_graph_runner,
                            nullptr) {}

FakeLayerTreeHostImpl::FakeLayerTreeHostImpl(
    const LayerTreeSettings& settings,
    TaskRunnerProvider* task_runner_provider,
    SharedBitmapManager* manager,
    TaskGraphRunner* task_graph_runner)
    : FakeLayerTreeHostImpl(settings,
                            task_runner_provider,
                            manager,
                            task_graph_runner,
                            nullptr) {}

FakeLayerTreeHostImpl::FakeLayerTreeHostImpl(
    const LayerTreeSettings& settings,
    TaskRunnerProvider* task_runner_provider,
    SharedBitmapManager* manager,
    TaskGraphRunner* task_graph_runner,
    gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager)
    : LayerTreeHostImpl(settings,
                        &client_,
                        task_runner_provider,
                        &stats_instrumentation_,
                        manager,
                        gpu_memory_buffer_manager,
                        task_graph_runner,
                        0),
      notify_tile_state_changed_called_(false) {
  // Explicitly clear all debug settings.
  SetDebugState(LayerTreeDebugState());
  SetViewportSize(gfx::Size(100, 100));

  // Start an impl frame so tests have a valid frame_time to work with.
  base::TimeTicks time_ticks = base::TimeTicks::FromInternalValue(1);
  WillBeginImplFrame(
      CreateBeginFrameArgsForTesting(BEGINFRAME_FROM_HERE, time_ticks));
}

FakeLayerTreeHostImpl::~FakeLayerTreeHostImpl() {}

void FakeLayerTreeHostImpl::CreatePendingTree() {
  LayerTreeHostImpl::CreatePendingTree();
  float arbitrary_large_page_scale = 100000.f;
  pending_tree()->PushPageScaleFromMainThread(
      1.f, 1.f / arbitrary_large_page_scale, arbitrary_large_page_scale);
}

void FakeLayerTreeHostImpl::NotifyTileStateChanged(const Tile* tile) {
  LayerTreeHostImpl::NotifyTileStateChanged(tile);
  notify_tile_state_changed_called_ = true;
}

BeginFrameArgs FakeLayerTreeHostImpl::CurrentBeginFrameArgs() const {
  return current_begin_frame_tracker_.DangerousMethodCurrentOrLast();
}

void FakeLayerTreeHostImpl::AdvanceToNextFrame(base::TimeDelta advance_by) {
  BeginFrameArgs next_begin_frame_args = current_begin_frame_tracker_.Current();
  next_begin_frame_args.frame_time += advance_by;
  DidFinishImplFrame();
  WillBeginImplFrame(next_begin_frame_args);
}

int FakeLayerTreeHostImpl::RecursiveUpdateNumChildren(LayerImpl* layer) {
  int num_children_that_draw_content = 0;
  for (size_t i = 0; i < layer->children().size(); ++i) {
    num_children_that_draw_content +=
        RecursiveUpdateNumChildren(layer->children()[i]);
  }
  layer->SetNumDescendantsThatDrawContent(num_children_that_draw_content);
  return num_children_that_draw_content + (layer->DrawsContent() ? 1 : 0);
}

void FakeLayerTreeHostImpl::UpdateNumChildrenAndDrawPropertiesForActiveTree() {
  UpdateNumChildrenAndDrawProperties(active_tree());
}

void FakeLayerTreeHostImpl::UpdateNumChildrenAndDrawProperties(
    LayerTreeImpl* layerTree) {
  RecursiveUpdateNumChildren(layerTree->root_layer());
  bool update_lcd_text = false;
  layerTree->BuildPropertyTreesForTesting();
  layerTree->UpdateDrawProperties(update_lcd_text);
}

}  // namespace cc