| 1 | // Copyright (C) 2024 The Qt Company Ltd. |
|---|---|
| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
| 3 | |
| 4 | #ifndef QSGTRANSFORM_P_H |
| 5 | #define QSGTRANSFORM_P_H |
| 6 | |
| 7 | // |
| 8 | // W A R N I N G |
| 9 | // ------------- |
| 10 | // |
| 11 | // This file is not part of the Qt API. It exists for the convenience |
| 12 | // of a number of Qt sources files. This header file may change from |
| 13 | // version to version without notice, or even be removed. |
| 14 | // |
| 15 | // We mean it. |
| 16 | // |
| 17 | |
| 18 | #include <QSharedPointer> |
| 19 | #include <QMatrix4x4> |
| 20 | #include <QtQuick/qtquickexports.h> |
| 21 | |
| 22 | QT_BEGIN_NAMESPACE |
| 23 | |
| 24 | class Q_QUICK_EXPORT QSGTransform |
| 25 | { |
| 26 | public: |
| 27 | void setMatrix(const QMatrix4x4 &matrix) |
| 28 | { |
| 29 | if (matrix.isIdentity()) |
| 30 | m_matrixPtr.clear(); |
| 31 | else |
| 32 | m_matrixPtr = QSharedPointer<QMatrix4x4>::create(arguments: matrix); |
| 33 | m_invertedPtr.clear(); |
| 34 | } |
| 35 | |
| 36 | QMatrix4x4 matrix() const |
| 37 | { |
| 38 | return m_matrixPtr ? *m_matrixPtr : m_identity; |
| 39 | } |
| 40 | |
| 41 | bool isIdentity() const |
| 42 | { |
| 43 | return !m_matrixPtr; |
| 44 | } |
| 45 | |
| 46 | bool operator==(const QMatrix4x4 &other) const |
| 47 | { |
| 48 | return m_matrixPtr ? (other == *m_matrixPtr) : other.isIdentity(); |
| 49 | } |
| 50 | |
| 51 | bool operator!=(const QMatrix4x4 &other) const |
| 52 | { |
| 53 | return !(*this == other); |
| 54 | } |
| 55 | |
| 56 | bool operator==(const QSGTransform &other) const |
| 57 | { |
| 58 | return (m_matrixPtr == other.m_matrixPtr) |
| 59 | || (m_matrixPtr && other.m_matrixPtr && *m_matrixPtr == *other.m_matrixPtr); |
| 60 | } |
| 61 | |
| 62 | bool operator!=(const QSGTransform &other) const |
| 63 | { |
| 64 | return !(*this == other); |
| 65 | } |
| 66 | |
| 67 | int compareTo(const QSGTransform &other) const |
| 68 | { |
| 69 | int diff = 0; |
| 70 | if (m_matrixPtr != other.m_matrixPtr) { |
| 71 | if (m_matrixPtr.isNull()) { |
| 72 | diff = -1; |
| 73 | } else if (other.m_matrixPtr.isNull()) { |
| 74 | diff = 1; |
| 75 | } else { |
| 76 | const float *ptr1 = m_matrixPtr->constData(); |
| 77 | const float *ptr2 = other.m_matrixPtr->constData(); |
| 78 | for (int i = 0; i < 16 && !diff; i++) { |
| 79 | float d = ptr1[i] - ptr2[i]; |
| 80 | if (d != 0) |
| 81 | diff = (d > 0) ? 1 : -1; |
| 82 | } |
| 83 | } |
| 84 | } |
| 85 | return diff; |
| 86 | } |
| 87 | |
| 88 | const float *invertedData() const |
| 89 | { |
| 90 | if (!m_matrixPtr) |
| 91 | return m_identity.constData(); |
| 92 | if (!m_invertedPtr) |
| 93 | m_invertedPtr = QSharedPointer<QMatrix4x4>::create(arguments: m_matrixPtr->inverted()); |
| 94 | return m_invertedPtr->constData(); |
| 95 | } |
| 96 | |
| 97 | private: |
| 98 | static QMatrix4x4 m_identity; |
| 99 | QSharedPointer<QMatrix4x4> m_matrixPtr; |
| 100 | mutable QSharedPointer<QMatrix4x4> m_invertedPtr; |
| 101 | }; |
| 102 | |
| 103 | QT_END_NAMESPACE |
| 104 | |
| 105 | #endif // QSGTRANSFORM_P_H |
| 106 |