third_party/WebKit/Source/core/dom/DOMMatrix.cpp

// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "core/dom/DOMMatrix.h"

namespace blink {

DOMMatrix* DOMMatrix::create()
{
    return new DOMMatrix(TransformationMatrix());
}

DOMMatrix* DOMMatrix::create(DOMMatrixReadOnly* other)
{
    return new DOMMatrix(other->matrix(), other->is2D());
}

DOMMatrix* DOMMatrix::create(const SkMatrix44& matrix)
{
    TransformationMatrix transformationMatrix(matrix);
    return new DOMMatrix(transformationMatrix, transformationMatrix.isAffine());
}

DOMMatrix* DOMMatrix::fromFloat32Array(DOMFloat32Array* float32Array, ExceptionState& exceptionState)
{
    if (float32Array->length() != 6 && float32Array->length() != 16) {
        exceptionState.throwTypeError("The sequence must contain 6 elements for a 2D matrix or 16 elements for a 3D matrix.");
        return nullptr;
    }
    return new DOMMatrix(float32Array->data(), float32Array->length());
}

DOMMatrix* DOMMatrix::fromFloat64Array(DOMFloat64Array* float64Array, ExceptionState& exceptionState)
{
    if (float64Array->length() != 6 && float64Array->length() != 16) {
        exceptionState.throwTypeError("The sequence must contain 6 elements for a 2D matrix or 16 elements for a 3D matrix.");
        return nullptr;
    }
    return new DOMMatrix(float64Array->data(), float64Array->length());
}

template <typename T>
DOMMatrix::DOMMatrix(T sequence, int size) : DOMMatrixReadOnly(sequence, size)
{
}

DOMMatrix::DOMMatrix(const TransformationMatrix& matrix, bool is2D)
{
    m_matrix = TransformationMatrix::create(matrix);
    m_is2D = is2D;
}

void DOMMatrix::setIs2D(bool value)
{
    if (m_is2D)
        m_is2D = value;
}

DOMMatrix* DOMMatrix::multiplySelf(DOMMatrix* other)
{
    if (!other->is2D())
        m_is2D = false;

    *m_matrix *= other->matrix();

    return this;
}

DOMMatrix* DOMMatrix::preMultiplySelf(DOMMatrix* other)
{
    if (!other->is2D())
        m_is2D = false;

    TransformationMatrix& matrix = *m_matrix;
    *m_matrix = other->matrix() * matrix;

    return this;
}

DOMMatrix* DOMMatrix::translateSelf(double tx, double ty, double tz)
{
    if (!tx && !ty && !tz)
        return this;

    if (tz)
        m_is2D = false;

    if (m_is2D)
        m_matrix->translate(tx, ty);
    else
        m_matrix->translate3d(tx, ty, tz);

    return this;
}

DOMMatrix* DOMMatrix::scaleSelf(double scale, double ox, double oy)
{
    return scaleNonUniformSelf(scale, scale, 1, ox, oy);
}

DOMMatrix* DOMMatrix::scale3dSelf(double scale, double ox, double oy, double oz)
{
    return scaleNonUniformSelf(scale, scale, scale, ox, oy, oz);
}

DOMMatrix* DOMMatrix::scaleNonUniformSelf(double sx, double sy, double sz,
    double ox, double oy, double oz)
{
    if (sz != 1 || oz)
        m_is2D = false;

    if (sx == 1 && sy == 1 && sz == 1)
        return this;

    bool hasTranslation = (ox || oy || oz);

    if (hasTranslation)
        translateSelf(ox, oy, oz);

    if (m_is2D)
        m_matrix->scaleNonUniform(sx, sy);
    else
        m_matrix->scale3d(sx, sy, sz);

    if (hasTranslation)
        translateSelf(-ox, -oy, -oz);

    return this;
}

DOMMatrix* DOMMatrix::skewXSelf(double sx)
{
    m_matrix->skewX(sx);
    return this;
}

DOMMatrix* DOMMatrix::skewYSelf(double sy)
{
    m_matrix->skewY(sy);
    return this;
}

DOMMatrix* DOMMatrix::invertSelf()
{
    if (m_matrix->isInvertible()) {
        m_matrix = TransformationMatrix::create(m_matrix->inverse());
    } else {
        setM11(NAN);
        setM12(NAN);
        setM13(NAN);
        setM14(NAN);
        setM21(NAN);
        setM22(NAN);
        setM23(NAN);
        setM24(NAN);
        setM31(NAN);
        setM32(NAN);
        setM33(NAN);
        setM34(NAN);
        setM41(NAN);
        setM42(NAN);
        setM43(NAN);
        setM44(NAN);
        setIs2D(false);
    }
    return this;
}

} // namespace blink