// 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/layers/picture_layer.h"

#include "cc/layers/content_layer_client.h"
#include "cc/layers/picture_layer_impl.h"
#include "cc/resources/resource_update_queue.h"
#include "cc/test/fake_layer_tree_host.h"
#include "cc/test/fake_picture_layer_impl.h"
#include "cc/test/fake_proxy.h"
#include "cc/test/impl_side_painting_settings.h"
#include "cc/trees/occlusion_tracker.h"
#include "cc/trees/single_thread_proxy.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace cc {
namespace {

class MockContentLayerClient : public ContentLayerClient {
 public:
  void PaintContents(
      SkCanvas* canvas,
      const gfx::Rect& clip,
      ContentLayerClient::GraphicsContextStatus gc_status) override {}
  void DidChangeLayerCanUseLCDText() override {}
  bool FillsBoundsCompletely() const override { return false; };
};

TEST(PictureLayerTest, NoTilesIfEmptyBounds) {
  MockContentLayerClient client;
  scoped_refptr<PictureLayer> layer = PictureLayer::Create(&client);
  layer->SetBounds(gfx::Size(10, 10));

  FakeLayerTreeHostClient host_client(FakeLayerTreeHostClient::DIRECT_3D);
  scoped_ptr<FakeLayerTreeHost> host = FakeLayerTreeHost::Create(&host_client);
  host->SetRootLayer(layer);
  layer->SetIsDrawable(true);
  layer->SavePaintProperties();

  OcclusionTracker<Layer> occlusion(gfx::Rect(0, 0, 1000, 1000));
  scoped_ptr<ResourceUpdateQueue> queue(new ResourceUpdateQueue);
  layer->Update(queue.get(), &occlusion);

  layer->SetBounds(gfx::Size(0, 0));
  layer->SavePaintProperties();
  // Intentionally skipping Update since it would normally be skipped on
  // a layer with empty bounds.

  FakeProxy proxy;
  {
    DebugScopedSetImplThread impl_thread(&proxy);

    TestSharedBitmapManager shared_bitmap_manager;
    FakeLayerTreeHostImpl host_impl(
        ImplSidePaintingSettings(), &proxy, &shared_bitmap_manager);
    host_impl.CreatePendingTree();
    scoped_ptr<FakePictureLayerImpl> layer_impl =
        FakePictureLayerImpl::Create(host_impl.pending_tree(), 1);

    layer->PushPropertiesTo(layer_impl.get());
    EXPECT_FALSE(layer_impl->CanHaveTilings());
    EXPECT_TRUE(layer_impl->bounds() == gfx::Size(0, 0));
    EXPECT_EQ(gfx::Size(), layer_impl->pile()->tiling_size());
    EXPECT_FALSE(layer_impl->pile()->HasRecordings());
  }
}

TEST(PictureLayerTest, SuitableForGpuRasterization) {
  MockContentLayerClient client;
  scoped_refptr<PictureLayer> layer = PictureLayer::Create(&client);
  PicturePile* pile = layer->GetPicturePileForTesting();

  // Layer is suitable for gpu rasterization by default.
  EXPECT_TRUE(pile->is_suitable_for_gpu_rasterization());
  EXPECT_TRUE(layer->IsSuitableForGpuRasterization());

  // Veto gpu rasterization.
  pile->SetUnsuitableForGpuRasterizationForTesting();
  EXPECT_FALSE(pile->is_suitable_for_gpu_rasterization());
  EXPECT_FALSE(layer->IsSuitableForGpuRasterization());
}

TEST(PictureLayerTest, UseTileGridSize) {
  LayerTreeSettings settings;
  settings.default_tile_grid_size = gfx::Size(123, 123);

  MockContentLayerClient client;
  scoped_refptr<PictureLayer> layer = PictureLayer::Create(&client);
  FakeLayerTreeHostClient host_client(FakeLayerTreeHostClient::DIRECT_3D);
  scoped_ptr<FakeLayerTreeHost> host =
      FakeLayerTreeHost::Create(&host_client, settings);
  host->SetRootLayer(layer);

  // Tile-grid is set according to its setting.
  SkTileGridFactory::TileGridInfo info =
      layer->GetPicturePileForTesting()->GetTileGridInfoForTesting();
  EXPECT_EQ(info.fTileInterval.width(), 123 - 2 * info.fMargin.width());
  EXPECT_EQ(info.fTileInterval.height(), 123 - 2 * info.fMargin.height());
}

}  // namespace
}  // namespace cc