/*
 * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
 * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
 *
 * 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.
 *
 */

#include "platform/transforms/MatrixTransformOperation.h"

#include <algorithm>

namespace blink {

PassRefPtr<TransformOperation> MatrixTransformOperation::blend(
    const TransformOperation* from,
    double progress,
    bool blendToIdentity) {
  if (from && !from->isSameType(*this))
    return this;

  // convert the TransformOperations into matrices
  FloatSize size;
  TransformationMatrix fromT;
  TransformationMatrix toT(m_a, m_b, m_c, m_d, m_e, m_f);
  if (from) {
    const MatrixTransformOperation* m =
        static_cast<const MatrixTransformOperation*>(from);
    fromT.setMatrix(m->m_a, m->m_b, m->m_c, m->m_d, m->m_e, m->m_f);
  }

  if (blendToIdentity)
    std::swap(fromT, toT);

  toT.blend(fromT, progress);
  return MatrixTransformOperation::create(toT.a(), toT.b(), toT.c(), toT.d(),
                                          toT.e(), toT.f());
}

PassRefPtr<TransformOperation> MatrixTransformOperation::zoom(double factor) {
  return create(m_a, m_b, m_c, m_d, m_e * factor, m_f * factor);
}

}  // namespace blink