third_party/WebKit/Source/platform/graphics/CompositorMutation.h

// Copyright 2016 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 CompositorMutation_h
#define CompositorMutation_h

#include "platform/graphics/CompositorMutableProperties.h"
#include "third_party/skia/include/core/SkMatrix44.h"
#include "wtf/HashMap.h"
#include <memory>

namespace blink {

class CompositorMutation {
 public:
  void setOpacity(float opacity) {
    m_mutatedFlags |= CompositorMutableProperty::kOpacity;
    m_opacity = opacity;
  }
  void setScrollLeft(float scrollLeft) {
    m_mutatedFlags |= CompositorMutableProperty::kScrollLeft;
    m_scrollLeft = scrollLeft;
  }
  void setScrollTop(float scrollTop) {
    m_mutatedFlags |= CompositorMutableProperty::kScrollTop;
    m_scrollTop = scrollTop;
  }
  void setTransform(const SkMatrix44& transform) {
    m_mutatedFlags |= CompositorMutableProperty::kTransform;
    m_transform = transform;
  }

  bool isOpacityMutated() const {
    return m_mutatedFlags & CompositorMutableProperty::kOpacity;
  }
  bool isScrollLeftMutated() const {
    return m_mutatedFlags & CompositorMutableProperty::kScrollLeft;
  }
  bool isScrollTopMutated() const {
    return m_mutatedFlags & CompositorMutableProperty::kScrollTop;
  }
  bool isTransformMutated() const {
    return m_mutatedFlags & CompositorMutableProperty::kTransform;
  }

  float opacity() const { return m_opacity; }
  float scrollLeft() const { return m_scrollLeft; }
  float scrollTop() const { return m_scrollTop; }
  SkMatrix44 transform() const { return m_transform; }

 private:
  uint32_t m_mutatedFlags = 0;
  float m_opacity = 0;
  float m_scrollLeft = 0;
  float m_scrollTop = 0;
  SkMatrix44 m_transform;
};

struct CompositorMutations {
  HashMap<uint64_t, std::unique_ptr<CompositorMutation>> map;
};

}  // namespace blink

#endif  // CompositorMutation_h