зеркало из https://github.com/mozilla/gecko-dev.git
82 строки
2.8 KiB
C++
82 строки
2.8 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "SMILFloatType.h"
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#include "mozilla/SMILValue.h"
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#include "nsDebug.h"
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#include <math.h>
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namespace mozilla {
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void SMILFloatType::Init(SMILValue& aValue) const {
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MOZ_ASSERT(aValue.IsNull(), "Unexpected value type");
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aValue.mU.mDouble = 0.0;
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aValue.mType = this;
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}
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void SMILFloatType::Destroy(SMILValue& aValue) const {
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MOZ_ASSERT(aValue.mType == this, "Unexpected SMIL value");
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aValue.mU.mDouble = 0.0;
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aValue.mType = SMILNullType::Singleton();
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}
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nsresult SMILFloatType::Assign(SMILValue& aDest, const SMILValue& aSrc) const {
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MOZ_ASSERT(aDest.mType == aSrc.mType, "Incompatible SMIL types");
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MOZ_ASSERT(aDest.mType == this, "Unexpected SMIL value");
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aDest.mU.mDouble = aSrc.mU.mDouble;
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return NS_OK;
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}
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bool SMILFloatType::IsEqual(const SMILValue& aLeft,
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const SMILValue& aRight) const {
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MOZ_ASSERT(aLeft.mType == aRight.mType, "Incompatible SMIL types");
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MOZ_ASSERT(aLeft.mType == this, "Unexpected type for SMIL value");
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return aLeft.mU.mDouble == aRight.mU.mDouble;
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}
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nsresult SMILFloatType::Add(SMILValue& aDest, const SMILValue& aValueToAdd,
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uint32_t aCount) const {
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MOZ_ASSERT(aValueToAdd.mType == aDest.mType, "Trying to add invalid types");
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MOZ_ASSERT(aValueToAdd.mType == this, "Unexpected source type");
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aDest.mU.mDouble += aValueToAdd.mU.mDouble * aCount;
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return NS_OK;
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}
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nsresult SMILFloatType::ComputeDistance(const SMILValue& aFrom,
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const SMILValue& aTo,
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double& aDistance) const {
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MOZ_ASSERT(aFrom.mType == aTo.mType, "Trying to compare different types");
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MOZ_ASSERT(aFrom.mType == this, "Unexpected source type");
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const double& from = aFrom.mU.mDouble;
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const double& to = aTo.mU.mDouble;
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aDistance = fabs(to - from);
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return NS_OK;
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}
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nsresult SMILFloatType::Interpolate(const SMILValue& aStartVal,
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const SMILValue& aEndVal,
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double aUnitDistance,
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SMILValue& aResult) const {
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MOZ_ASSERT(aStartVal.mType == aEndVal.mType,
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"Trying to interpolate different types");
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MOZ_ASSERT(aStartVal.mType == this, "Unexpected types for interpolation");
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MOZ_ASSERT(aResult.mType == this, "Unexpected result type");
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const double& startVal = aStartVal.mU.mDouble;
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const double& endVal = aEndVal.mU.mDouble;
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aResult.mU.mDouble = (startVal + (endVal - startVal) * aUnitDistance);
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return NS_OK;
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}
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} // namespace mozilla
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