C++ TransformOperations类代码示例

 Vector<RefPtr<TransformOperation>> concat(const TransformOperations& a,
                                           const TransformOperations& b) {
   Vector<RefPtr<TransformOperation>> result;
   result.reserveCapacity(a.size() + b.size());
   result.appendVector(a.operations());
   result.appendVector(b.operations());
   return result;
 }

void ArgumentCoder<TransformOperations>::encode(ArgumentEncoder& encoder, const TransformOperations& transformOperations)
{
    encoder << static_cast<uint32_t>(transformOperations.size());
    for (size_t i = 0; i < transformOperations.size(); ++i) {
        const TransformOperation* operation = transformOperations.at(i);
        encoder.encodeEnum(operation->getOperationType());

        switch (operation->getOperationType()) {
        case TransformOperation::SCALE_X:
        case TransformOperation::SCALE_Y:
        case TransformOperation::SCALE:
        case TransformOperation::SCALE_Z:
        case TransformOperation::SCALE_3D:
            encoder << static_cast<const ScaleTransformOperation*>(operation)->x();
            encoder << static_cast<const ScaleTransformOperation*>(operation)->y();
            encoder << static_cast<const ScaleTransformOperation*>(operation)->z();
            break;
        case TransformOperation::TRANSLATE_X:
        case TransformOperation::TRANSLATE_Y:
        case TransformOperation::TRANSLATE:
        case TransformOperation::TRANSLATE_Z:
        case TransformOperation::TRANSLATE_3D:
            ArgumentCoder<Length>::encode(encoder, static_cast<const TranslateTransformOperation*>(operation)->x());
            ArgumentCoder<Length>::encode(encoder, static_cast<const TranslateTransformOperation*>(operation)->y());
            ArgumentCoder<Length>::encode(encoder, static_cast<const TranslateTransformOperation*>(operation)->z());
            break;
        case TransformOperation::ROTATE:
        case TransformOperation::ROTATE_X:
        case TransformOperation::ROTATE_Y:
        case TransformOperation::ROTATE_3D:
            encoder << static_cast<const RotateTransformOperation*>(operation)->x();
            encoder << static_cast<const RotateTransformOperation*>(operation)->y();
            encoder << static_cast<const RotateTransformOperation*>(operation)->z();
            encoder << static_cast<const RotateTransformOperation*>(operation)->angle();
            break;
        case TransformOperation::SKEW_X:
        case TransformOperation::SKEW_Y:
        case TransformOperation::SKEW:
            encoder << static_cast<const SkewTransformOperation*>(operation)->angleX();
            encoder << static_cast<const SkewTransformOperation*>(operation)->angleY();
            break;
        case TransformOperation::MATRIX:
            ArgumentCoder<TransformationMatrix>::encode(encoder, static_cast<const MatrixTransformOperation*>(operation)->matrix());
            break;
        case TransformOperation::MATRIX_3D:
            ArgumentCoder<TransformationMatrix>::encode(encoder, static_cast<const Matrix3DTransformOperation*>(operation)->matrix());
            break;
        case TransformOperation::PERSPECTIVE:
            ArgumentCoder<Length>::encode(encoder, static_cast<const PerspectiveTransformOperation*>(operation)->perspective());
            break;
        case TransformOperation::IDENTITY:
            break;
        case TransformOperation::NONE:
            ASSERT_NOT_REACHED();
            break;
        }
    }
}

TransformOperations TransformOperations::blend(const TransformOperations& from, double progress, const LayoutSize& size) const
{
    if (from == *this)
        return *this;

    if (from.size() && from.operationsMatch(*this))
        return blendByMatchingOperations(from, progress);

    return blendByUsingMatrixInterpolation(from, progress, size);
}

bool TransformOperations::operationsMatch(const TransformOperations& other) const
{
    size_t numOperations = operations().size();
    // If the sizes of the function lists don't match, the lists don't match
    if (numOperations != other.operations().size())
        return false;
    
    // If the types of each function are not the same, the lists don't match
    for (size_t i = 0; i < numOperations; ++i) {
        if (!operations()[i]->isSameType(*other.operations()[i]))
            return false;
    }
    return true;
}

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

    TransformOperations thisOperations;
    thisOperations.operations().append(this);
    TransformOperations fromOperations;
    if (blendToIdentity)
        fromOperations.operations().append(IdentityTransformOperation::create());
    else
        fromOperations.operations().append(const_cast<TransformOperation*>(from));
    return InterpolatedTransformOperation::create(thisOperations, fromOperations, progress);
}

TEST(AnimationTranslationUtilTest, transformsWork)
{
    TransformOperations ops;
    WebTransformOperationsMock outOps;

    EXPECT_CALL(outOps, appendTranslate(2, 0, 0));
    EXPECT_CALL(outOps, appendRotate(0.1, 0.2, 0.3, 200000.4));
    EXPECT_CALL(outOps, appendScale(50.2, 100, -4));

    ops.operations().append(TranslateTransformOperation::create(Length(2, Fixed), Length(0, Fixed), TransformOperation::TranslateX));
    ops.operations().append(RotateTransformOperation::create(0.1, 0.2, 0.3, 200000.4, TransformOperation::Rotate3D));
    ops.operations().append(ScaleTransformOperation::create(50.2, 100, -4, TransformOperation::Scale3D));
    toWebTransformOperations(ops, &outOps);
}

void PrintTo(const AnimatableTransform& animTransform, ::std::ostream* os)
{
    TransformOperations ops = animTransform.transformOperations();

    *os << "AnimatableTransform(";
    // FIXME: TransformOperations should really have it's own pretty-printer
    // then we could just call that.
    // FIXME: Output useful names not just the raw matrixes.
    for (unsigned i = 0; i < ops.size(); i++) {
        const TransformOperation* op = ops.at(i);

        TransformationMatrix matrix;
        op->apply(matrix, FloatSize(1.0, 1.0));

        *os << "[";
        if (matrix.isAffine()) {
            *os << matrix.a();
            *os << " " << matrix.b();
            *os << " " << matrix.c();
            *os << " " << matrix.d();
            *os << " " << matrix.e();
            *os << " " << matrix.f();
        } else {
            *os << matrix.m11();
            *os << " " << matrix.m12();
            *os << " " << matrix.m13();
            *os << " " << matrix.m14();
            *os << " ";
            *os << " " << matrix.m21();
            *os << " " << matrix.m22();
            *os << " " << matrix.m23();
            *os << " " << matrix.m24();
            *os << " ";
            *os << " " << matrix.m31();
            *os << " " << matrix.m32();
            *os << " " << matrix.m33();
            *os << " " << matrix.m34();
            *os << " ";
            *os << " " << matrix.m41();
            *os << " " << matrix.m42();
            *os << " " << matrix.m43();
            *os << " " << matrix.m44();
        }
        *os << "]";
        if (i < ops.size() - 1)
            *os << ", ";
    }
    *os << ")";
}

TransformOperations TransformOperations::blendByUsingMatrixInterpolation(const TransformOperations& from, double progress, const LayoutSize& size) const
{
    TransformOperations result;

    // Convert the TransformOperations into matrices
    TransformationMatrix fromTransform;
    TransformationMatrix toTransform;
    from.apply(size, fromTransform);
    apply(size, toTransform);

    toTransform.blend(fromTransform, progress);

    // Append the result
    result.operations().append(Matrix3DTransformOperation::create(toTransform));

    return result;
}

TEST_F(AnimationCompositorAnimationsTest, isNotCandidateForCompositorAnimationTransformDependsOnBoxSize)
{
    TransformOperations ops;
    ops.operations().append(TranslateTransformOperation::create(Length(2, Fixed), Length(2, Fixed), TransformOperation::TranslateX));
    RefPtr<AnimatableValueKeyframe> goodKeyframe = createReplaceOpKeyframe(CSSPropertyTransform, AnimatableTransform::create(ops).get());
    EXPECT_TRUE(duplicateSingleKeyframeAndTestIsCandidateOnResult(goodKeyframe.get()));

    ops.operations().append(TranslateTransformOperation::create(Length(50, Percent), Length(2, Fixed), TransformOperation::TranslateX));
    RefPtr<AnimatableValueKeyframe> badKeyframe = createReplaceOpKeyframe(CSSPropertyTransform, AnimatableTransform::create(ops).get());
    EXPECT_FALSE(duplicateSingleKeyframeAndTestIsCandidateOnResult(badKeyframe.get()));

    TransformOperations ops2;
    Length calcLength = Length(100, Percent).blend(Length(100, Fixed), 0.5, ValueRangeAll);
    ops2.operations().append(TranslateTransformOperation::create(calcLength, Length(0, Fixed), TransformOperation::TranslateX));
    RefPtr<AnimatableValueKeyframe> badKeyframe2 = createReplaceOpKeyframe(CSSPropertyTransform, AnimatableTransform::create(ops2).get());
    EXPECT_FALSE(duplicateSingleKeyframeAndTestIsCandidateOnResult(badKeyframe2.get()));
}

static TransformationMatrix applyTransformAnimation(const TransformOperations& from, const TransformOperations& to, double progress, const FloatSize& boxSize, bool listsMatch)
{
    TransformationMatrix matrix;

    // First frame of an animation.
    if (!progress) {
        from.apply(boxSize, matrix);
        return matrix;
    }

    // Last frame of an animation.
    if (progress == 1) {
        to.apply(boxSize, matrix);
        return matrix;
    }

    // If we have incompatible operation lists, we blend the resulting matrices.
    if (!listsMatch) {
        TransformationMatrix fromMatrix;
        to.apply(boxSize, matrix);
        from.apply(boxSize, fromMatrix);
        matrix.blend(fromMatrix, progress);
        return matrix;
    }

    // Animation to "-webkit-transform: none".
    if (!to.size()) {
        TransformOperations blended(from);
        for (auto& operation : blended.operations())
            operation->blend(nullptr, progress, true)->apply(matrix, boxSize);
        return matrix;
    }

    // Animation from "-webkit-transform: none".
    if (!from.size()) {
        TransformOperations blended(to);
        for (auto& operation : blended.operations())
            operation->blend(nullptr, 1 - progress, true)->apply(matrix, boxSize);
        return matrix;
    }

    // Normal animation with a matching operation list.
    TransformOperations blended(to);
    for (size_t i = 0; i < blended.operations().size(); ++i)
        blended.operations()[i]->blend(from.at(i), progress, !from.at(i))->apply(matrix, boxSize);
    return matrix;
}

void WebKitCSSMatrix::setMatrixValue(const String& string, ExceptionCode& ec)
{
    if (string.isEmpty())
        return;

    RefPtr<StylePropertySet> styleDeclaration = StylePropertySet::create();
    if (CSSParser::parseValue(styleDeclaration.get(), CSSPropertyWebkitTransform, string, true, CSSStrictMode, 0)) {
        // Convert to TransformOperations. This can fail if a property
        // requires style (i.e., param uses 'ems' or 'exs')
        RefPtr<CSSValue> value = styleDeclaration->getPropertyCSSValue(CSSPropertyWebkitTransform);

        // Check for a "none" or empty transform. In these cases we can use the default identity matrix.
        if (!value || (value->isPrimitiveValue() && (static_cast<CSSPrimitiveValue*>(value.get()))->getIdent() == CSSValueNone))
            return;

        TransformOperations operations;
        if (!StyleResolver::createTransformOperations(value.get(), 0, 0, operations)) {
            ec = SYNTAX_ERR;
            return;
        }

        // Convert transform operations to a TransformationMatrix. This can fail
        // if a param has a percentage ('%')
        TransformationMatrix t;
        for (unsigned i = 0; i < operations.operations().size(); ++i) {
            if (operations.operations()[i].get()->apply(t, IntSize(0, 0))) {
                ec = SYNTAX_ERR;
                return;
            }
        }

        // set the matrix
        m_matrix = t;
    } else // There is something there but parsing failed.
        ec = SYNTAX_ERR;
}

void CSSMatrix::setMatrixValue(const String& string, ExceptionState& exceptionState)
{
    if (string.isEmpty())
        return;

    // FIXME: crbug.com/154722 - should this continue to use legacy style parsing?
    RefPtrWillBeRawPtr<MutableStylePropertySet> styleDeclaration = MutableStylePropertySet::create();
    if (BisonCSSParser::parseValue(styleDeclaration.get(), CSSPropertyWebkitTransform, string, true, HTMLStandardMode, 0)) {
        // Convert to TransformOperations. This can fail if a property
        // requires style (i.e., param uses 'ems' or 'exs')
        RefPtrWillBeRawPtr<CSSValue> value = styleDeclaration->getPropertyCSSValue(CSSPropertyWebkitTransform);

        // Check for a "none" or empty transform. In these cases we can use the default identity matrix.
        if (!value || (value->isPrimitiveValue() && (toCSSPrimitiveValue(value.get()))->getValueID() == CSSValueNone))
            return;

        DEFINE_STATIC_REF(RenderStyle, defaultStyle, RenderStyle::createDefaultStyle());
        TransformOperations operations;
        if (!TransformBuilder::createTransformOperations(value.get(), CSSToLengthConversionData(defaultStyle, defaultStyle, 0, 0, 1.0f), operations)) {
            exceptionState.throwDOMException(SyntaxError, "Failed to interpret '" + string + "' as a transformation operation.");
            return;
        }

        // Convert transform operations to a TransformationMatrix. This can fail
        // if a param has a percentage ('%')
        if (operations.dependsOnBoxSize())
            exceptionState.throwDOMException(SyntaxError, "The transformation depends on the box size, which is not supported.");
        TransformationMatrix t;
        operations.apply(FloatSize(0, 0), t);

        // set the matrix
        m_matrix = t;
    } else { // There is something there but parsing failed.
        exceptionState.throwDOMException(SyntaxError, "Failed to parse '" + string + "'.");
    }
}

void CSSMatrix::setMatrixValue(const String& string, ExceptionState& exceptionState)
{
    if (string.isEmpty())
        return;

    if (RefPtrWillBeRawPtr<CSSValue> value = CSSParser::parseSingleValue(CSSPropertyTransform, string)) {
        // Check for a "none" transform. In these cases we can use the default identity matrix.
        if (value->isPrimitiveValue() && (toCSSPrimitiveValue(value.get()))->getValueID() == CSSValueNone)
            return;

        DEFINE_STATIC_REF(ComputedStyle, initialStyle, createInitialStyle());
        TransformOperations operations;
        TransformBuilder::createTransformOperations(*value, CSSToLengthConversionData(initialStyle, initialStyle, nullptr, 1.0f), operations);

        // Convert transform operations to a TransformationMatrix. This can fail
        // if a param has a percentage ('%')
        if (operations.dependsOnBoxSize())
            exceptionState.throwDOMException(SyntaxError, "The transformation depends on the box size, which is not supported.");
        m_matrix = adoptPtr(new TransformationMatrix);
        operations.apply(FloatSize(0, 0), *m_matrix);
    } else { // There is something there but parsing failed.
        exceptionState.throwDOMException(SyntaxError, "Failed to parse '" + string + "'.");
    }
}

  PassRefPtr<CSSTransformNonInterpolableValue> composite(
      const CSSTransformNonInterpolableValue& other,
      double otherProgress) {
    DCHECK(!isAdditive());
    if (other.m_isSingle) {
      DCHECK_EQ(otherProgress, 0);
      DCHECK(other.isAdditive());
      TransformOperations result;
      result.operations() = concat(transform(), other.transform());
      return create(std::move(result));
    }

    DCHECK(other.m_isStartAdditive || other.m_isEndAdditive);
    TransformOperations start;
    start.operations() = other.m_isStartAdditive
                             ? concat(transform(), other.m_start)
                             : other.m_start.operations();
    TransformOperations end;
    end.operations() = other.m_isEndAdditive ? concat(transform(), other.m_end)
                                             : other.m_end.operations();
    return create(end.blend(start, otherProgress));
  }

TransformOperations TransformOperations::blendByMatchingOperations(const TransformOperations& from, const double& progress) const
{
    TransformOperations result;

    unsigned fromSize = from.operations().size();
    unsigned toSize = operations().size();
    unsigned size = max(fromSize, toSize);
    for (unsigned i = 0; i < size; i++) {
        RefPtr<TransformOperation> fromOperation = (i < fromSize) ? from.operations()[i].get() : 0;
        RefPtr<TransformOperation> toOperation = (i < toSize) ? operations()[i].get() : 0;
        RefPtr<TransformOperation> blendedOperation = toOperation ? toOperation->blend(fromOperation.get(), progress) : (fromOperation ? fromOperation->blend(0, progress, true) : 0);
        if (blendedOperation)
            result.operations().append(blendedOperation);
        else {
            RefPtr<TransformOperation> identityOperation = IdentityTransformOperation::create();
            if (progress > 0.5)
                result.operations().append(toOperation ? toOperation : identityOperation);
            else
                result.operations().append(fromOperation ? fromOperation : identityOperation);
        }
    }

    return result;
}