cc/playback/transform_display_item.h

// Copyright 2014 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_PLAYBACK_TRANSFORM_DISPLAY_ITEM_H_
#define CC_PLAYBACK_TRANSFORM_DISPLAY_ITEM_H_

#include <stddef.h>

#include "base/memory/scoped_ptr.h"
#include "cc/base/cc_export.h"
#include "cc/playback/display_item.h"
#include "ui/gfx/transform.h"

class SkCanvas;

namespace cc {
class ImageSerializationProcessor;

class CC_EXPORT TransformDisplayItem : public DisplayItem {
 public:
  explicit TransformDisplayItem(const gfx::Transform& transform);
  explicit TransformDisplayItem(const proto::DisplayItem& proto);
  ~TransformDisplayItem() override;

  void ToProtobuf(proto::DisplayItem* proto,
                  ImageSerializationProcessor* image_serialization_processor)
      const override;
  void Raster(SkCanvas* canvas,
              const gfx::Rect& canvas_target_playback_rect,
              SkPicture::AbortCallback* callback) const override;
  void AsValueInto(const gfx::Rect& visual_rect,
                   base::trace_event::TracedValue* array) const override;
  size_t ExternalMemoryUsage() const override;

  int ApproximateOpCount() const { return 1; }
  bool IsSuitableForGpuRasterization() const { return true; }

 private:
  void SetNew(const gfx::Transform& transform);

  gfx::Transform transform_;
};

class CC_EXPORT EndTransformDisplayItem : public DisplayItem {
 public:
  EndTransformDisplayItem();
  explicit EndTransformDisplayItem(const proto::DisplayItem& proto);
  ~EndTransformDisplayItem() override;

  static scoped_ptr<EndTransformDisplayItem> Create() {
    return make_scoped_ptr(new EndTransformDisplayItem());
  }

  void ToProtobuf(proto::DisplayItem* proto,
                  ImageSerializationProcessor* image_serialization_processor)
      const override;
  void Raster(SkCanvas* canvas,
              const gfx::Rect& canvas_target_playback_rect,
              SkPicture::AbortCallback* callback) const override;
  void AsValueInto(const gfx::Rect& visual_rect,
                   base::trace_event::TracedValue* array) const override;
  size_t ExternalMemoryUsage() const override;

  int ApproximateOpCount() const { return 0; }
  bool IsSuitableForGpuRasterization() const { return true; }
};

}  // namespace cc

#endif  // CC_PLAYBACK_TRANSFORM_DISPLAY_ITEM_H_