// 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/test/fake_picture_pile_impl.h"

#include <algorithm>
#include <limits>
#include <utility>

#include "base/synchronization/waitable_event.h"
#include "cc/playback/picture_pile.h"
#include "cc/trees/layer_tree_settings.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace cc {

FakePicturePileImpl::FakePicturePileImpl() : playback_allowed_event_(nullptr) {
}

FakePicturePileImpl::FakePicturePileImpl(
    const PicturePile* other,
    base::WaitableEvent* playback_allowed_event)
    : PicturePileImpl(other, true),
      playback_allowed_event_(playback_allowed_event),
      tile_grid_size_(other->GetTileGridSizeForTesting()) {
}

FakePicturePileImpl::~FakePicturePileImpl() {}

scoped_refptr<FakePicturePileImpl> FakePicturePileImpl::CreatePile(
    const gfx::Size& tile_size,
    const gfx::Size& layer_bounds,
    bool is_filled) {
  FakePicturePile pile(LayerTreeSettings().minimum_contents_scale,
                       LayerTreeSettings().default_tile_grid_size);
  pile.tiling().SetBorderTexels(0);
  pile.tiling().SetTilingSize(layer_bounds);
  pile.tiling().SetMaxTextureSize(tile_size);
  pile.SetRecordedViewport(is_filled ? gfx::Rect(layer_bounds) : gfx::Rect());
  pile.SetHasAnyRecordings(is_filled);
  if (is_filled) {
    for (int x = 0; x < pile.tiling().num_tiles_x(); ++x) {
      for (int y = 0; y < pile.tiling().num_tiles_y(); ++y)
        pile.AddRecordingAt(x, y);
    }
  }
  scoped_refptr<FakePicturePileImpl> pile_impl(
      new FakePicturePileImpl(&pile, nullptr));
  return pile_impl;
}

scoped_refptr<FakePicturePileImpl> FakePicturePileImpl::CreateFilledPile(
    const gfx::Size& tile_size,
    const gfx::Size& layer_bounds) {
  bool is_filled = true;
  return CreatePile(tile_size, layer_bounds, is_filled);
}

scoped_refptr<FakePicturePileImpl> FakePicturePileImpl::CreateEmptyPile(
    const gfx::Size& tile_size,
    const gfx::Size& layer_bounds) {
  bool is_filled = false;
  return CreatePile(tile_size, layer_bounds, is_filled);
}

scoped_refptr<FakePicturePileImpl>
FakePicturePileImpl::CreateEmptyPileThatThinksItHasRecordings(
    const gfx::Size& tile_size,
    const gfx::Size& layer_bounds,
    bool is_solid_color) {
  FakePicturePile pile(LayerTreeSettings().minimum_contents_scale,
                       LayerTreeSettings().default_tile_grid_size);
  pile.tiling().SetBorderTexels(0);
  pile.tiling().SetTilingSize(layer_bounds);
  pile.tiling().SetMaxTextureSize(tile_size);
  // This simulates a false positive for this flag.
  pile.SetRecordedViewport(gfx::Rect());
  pile.SetHasAnyRecordings(true);
  pile.SetIsSolidColor(is_solid_color);
  return make_scoped_refptr(new FakePicturePileImpl(&pile, nullptr));
}

scoped_refptr<FakePicturePileImpl>
FakePicturePileImpl::CreateInfiniteFilledPile() {
  gfx::Size size(std::numeric_limits<int>::max(),
                 std::numeric_limits<int>::max());
  FakePicturePile pile(LayerTreeSettings().minimum_contents_scale, size);
  pile.tiling().SetBorderTexels(0);
  pile.tiling().SetTilingSize(size);
  pile.tiling().SetMaxTextureSize(size);
  pile.SetRecordedViewport(gfx::Rect(size));
  pile.SetHasAnyRecordings(true);
  pile.AddRecordingAt(0, 0);
  scoped_refptr<FakePicturePileImpl> pile_impl(
      new FakePicturePileImpl(&pile, nullptr));
  return pile_impl;
}

scoped_refptr<FakePicturePileImpl> FakePicturePileImpl::CreateFromPile(
    const PicturePile* other,
    base::WaitableEvent* playback_allowed_event) {
  return make_scoped_refptr(
      new FakePicturePileImpl(other, playback_allowed_event));
}

void FakePicturePileImpl::PlaybackToCanvas(
    SkCanvas* canvas,
    const gfx::Rect& canvas_bitmap_rect,
    const gfx::Rect& canvas_playback_rect,
    float contents_scale) const {
  if (playback_allowed_event_)
    playback_allowed_event_->Wait();
  PicturePileImpl::PlaybackToCanvas(canvas, canvas_bitmap_rect,
                                    canvas_playback_rect, contents_scale);
}

bool FakePicturePileImpl::HasRecordingAt(int x, int y) const {
  PictureMap::const_iterator found = picture_map_.find(PictureMapKey(x, y));
  return found != picture_map_.end();
}

}  // namespace cc