/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "LayerAnimationUtils.h"

#include "mozilla/ComputedTimingFunction.h" // For ComputedTimingFunction

#include "mozilla/layers/LayersMessages.h" // For TimingFunction etc.

#include "nsTimingFunction.h"

namespace mozilla {

namespace layers {

/* static */ Maybe<ComputedTimingFunction>

AnimationUtils::TimingFunctionToComputedTimingFunction(

  const TimingFunction& aTimingFunction)

{

  switch (aTimingFunction.type()) {

    case TimingFunction::Tnull_t:

      return Nothing();

    case TimingFunction::TCubicBezierFunction: {

      CubicBezierFunction cbf = aTimingFunction.get_CubicBezierFunction();

      return Some(ComputedTimingFunction::CubicBezier(cbf.x1(), cbf.y1(),

                                                      cbf.x2(), cbf.y2()));

    }

    case TimingFunction::TStepFunction: {

      StepFunction sf = aTimingFunction.get_StepFunction();

      nsTimingFunction::Type type = sf.type() == 1 ?

        nsTimingFunction::Type::StepStart :

        nsTimingFunction::Type::StepEnd;

      return Some(ComputedTimingFunction::Steps(type, sf.steps()));

    }

    case TimingFunction::TFramesFunction: {

      FramesFunction ff = aTimingFunction.get_FramesFunction();

      return Some(ComputedTimingFunction::Frames(ff.frames()));

    }

    default:

      MOZ_ASSERT_UNREACHABLE(

        "Function must be null, bezier, step or frames");

      break;

  }

  return Nothing();

}

} // namespace layers

} // namespace mozilla