third_party/WebKit/Source/core/svg/GradientAttributes.h

/*
 * Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#ifndef GradientAttributes_h
#define GradientAttributes_h

#include "core/svg/SVGGradientElement.h"
#include "core/svg/SVGUnitTypes.h"
#include "wtf/Allocator.h"

namespace blink {

struct GradientAttributes {
  DISALLOW_NEW();
  GradientAttributes()
      : m_spreadMethod(SVGSpreadMethodPad),
        m_gradientUnits(SVGUnitTypes::kSvgUnitTypeObjectboundingbox),
        m_spreadMethodSet(false),
        m_gradientUnitsSet(false),
        m_gradientTransformSet(false),
        m_stopsSet(false) {}

  SVGSpreadMethodType spreadMethod() const {
    return static_cast<SVGSpreadMethodType>(m_spreadMethod);
  }
  SVGUnitTypes::SVGUnitType gradientUnits() const {
    return static_cast<SVGUnitTypes::SVGUnitType>(m_gradientUnits);
  }
  AffineTransform gradientTransform() const { return m_gradientTransform; }
  const Vector<Gradient::ColorStop>& stops() const { return m_stops; }

  void setSpreadMethod(SVGSpreadMethodType value) {
    m_spreadMethod = value;
    m_spreadMethodSet = true;
  }

  void setGradientUnits(SVGUnitTypes::SVGUnitType unitType) {
    m_gradientUnits = unitType;
    m_gradientUnitsSet = true;
  }

  void setGradientTransform(const AffineTransform& value) {
    m_gradientTransform = value;
    m_gradientTransformSet = true;
  }

  void setStops(const Vector<Gradient::ColorStop>& value) {
    m_stops = value;
    m_stopsSet = true;
  }

  bool hasSpreadMethod() const { return m_spreadMethodSet; }
  bool hasGradientUnits() const { return m_gradientUnitsSet; }
  bool hasGradientTransform() const { return m_gradientTransformSet; }
  bool hasStops() const { return m_stopsSet; }

 private:
  // Properties
  AffineTransform m_gradientTransform;
  Vector<Gradient::ColorStop> m_stops;

  unsigned m_spreadMethod : 2;
  unsigned m_gradientUnits : 2;

  // Property states
  unsigned m_spreadMethodSet : 1;
  unsigned m_gradientUnitsSet : 1;
  unsigned m_gradientTransformSet : 1;
  unsigned m_stopsSet : 1;
};

struct SameSizeAsGradientAttributes {
  DISALLOW_NEW();
  AffineTransform a;
  Vector<Gradient::ColorStop> b;
  unsigned c : 8;
};

static_assert(sizeof(GradientAttributes) ==
                  sizeof(SameSizeAsGradientAttributes),
              "GradientAttributes should stay small");

}  // namespace blink

#endif