proceduralskytexturedata_p.h

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// Copyright (C) 2022 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only

// Qt-Security score:significant reason:default

//

//  W A R N I N G

//  -------------

//

// This file is not part of the Qt API.  It exists purely as an

// implementation detail.  This header file may change from version to

// version without notice, or even be removed.

//

// We mean it.

//

#ifndef PROCEDURALSKYTEXTURE_H

#define PROCEDURALSKYTEXTURE_H

#include <QtQuick3DHelpers/qtquick3dhelpersexports.h>

#include <QtQuick3D/QQuick3DTextureData>

#include <QtQml/QQmlEngine>

#include <QtGui/QColor>

#include <QtCore/QByteArray>

QT_BEGIN_NAMESPACE

class Q_QUICK3DHELPERS_EXPORT ProceduralSkyTextureData : public QQuick3DTextureData

    Q_OBJECT

    Q_PROPERTY(QColor skyTopColor READ skyTopColor WRITE setSkyTopColor NOTIFY skyTopColorChanged)

    Q_PROPERTY(QColor skyHorizonColor READ skyHorizonColor WRITE setSkyHorizonColor NOTIFY skyHorizonColorChanged)

    Q_PROPERTY(float skyCurve READ skyCurve WRITE setSkyCurve NOTIFY skyCurveChanged)

    Q_PROPERTY(float skyEnergy READ skyEnergy WRITE setSkyEnergy NOTIFY skyEnergyChanged)

    Q_PROPERTY(QColor groundBottomColor READ groundBottomColor WRITE setGroundBottomColor NOTIFY groundBottomColorChanged)

    Q_PROPERTY(QColor groundHorizonColor READ groundHorizonColor WRITE setGroundHorizonColor NOTIFY groundHorizonColorChanged)

    Q_PROPERTY(float groundCurve READ groundCurve WRITE setGroundCurve NOTIFY groundCurveChanged)

    Q_PROPERTY(float groundEnergy READ groundEnergy WRITE setGroundEnergy NOTIFY groundEnergyChanged)

    Q_PROPERTY(QColor sunColor READ sunColor WRITE setSunColor NOTIFY sunColorChanged)

    Q_PROPERTY(float sunLatitude READ sunLatitude WRITE setSunLatitude NOTIFY sunLatitudeChanged)

    Q_PROPERTY(float sunLongitude READ sunLongitude WRITE setSunLongitude NOTIFY sunLongitudeChanged)

    Q_PROPERTY(float sunAngleMin READ sunAngleMin WRITE setSunAngleMin NOTIFY sunAngleMinChanged)

    Q_PROPERTY(float sunAngleMax READ sunAngleMax WRITE setSunAngleMax NOTIFY sunAngleMaxChanged)

    Q_PROPERTY(float sunCurve READ sunCurve WRITE setSunCurve NOTIFY sunCurveChanged)

    Q_PROPERTY(float sunEnergy READ sunEnergy WRITE setSunEnergy NOTIFY sunEnergyChanged)

    Q_PROPERTY(SkyTextureQuality textureQuality READ textureQuality WRITE setTextureQuality NOTIFY textureQualityChanged)

    QML_ELEMENT

public:

    enum class SkyTextureQuality {

        SkyTextureQualityLow, // 512

        SkyTextureQualityMedium, // 1024

        SkyTextureQualityHigh, // 2048

        SkyTextureQualityVeryHigh, // 4096

};

    Q_ENUM(SkyTextureQuality)

    ProceduralSkyTextureData();

    ~ProceduralSkyTextureData();

    QColor skyTopColor() const;

    QColor skyHorizonColor() const;

    float skyCurve() const;

    float skyEnergy() const;

    QColor groundBottomColor() const;

    QColor groundHorizonColor() const;

    float groundCurve() const;

    float groundEnergy() const;

    QColor sunColor() const;

    float sunLatitude() const;

    float sunLongitude() const;

    float sunAngleMin() const;

    float sunAngleMax() const;

    float sunCurve() const;

    float sunEnergy() const;

    SkyTextureQuality textureQuality() const;

public Q_SLOTS:

    void setSkyTopColor(QColor skyTopColor);

    void setSkyHorizonColor(QColor skyHorizonColor);

    void setSkyCurve(float skyCurve);

    void setSkyEnergy(float skyEnergy);

    void setGroundBottomColor(QColor groundBottomColor);

    void setGroundHorizonColor(QColor groundHorizonColor);

    void setGroundCurve(float groundCurve);

    void setGroundEnergy(float groundEnergy);

    void setSunColor(QColor sunColor);

    void setSunLatitude(float sunLatitude);

    void setSunLongitude(float sunLongitude);

    void setSunAngleMin(float sunAngleMin);

    void setSunAngleMax(float sunAngleMax);

    void setSunCurve(float sunCurve);

    void setSunEnergy(float sunEnergy);

    void setTextureQuality(SkyTextureQuality textureQuality);

    void generateRGBA16FTexture();

Q_SIGNALS:

    void skyTopColorChanged(QColor skyTopColor);

    void skyHorizonColorChanged(QColor skyHorizonColor);

    void skyCurveChanged(float skyCurve);

    void skyEnergyChanged(float skyEnergy);

    void groundBottomColorChanged(QColor groundBottomColor);

    void groundHorizonColorChanged(QColor groundHorizonColor);

    void groundCurveChanged(float groundCurve);

    void groundEnergyChanged(float groundEnergy);

    void sunColorChanged(QColor sunColor);

    void sunLatitudeChanged(float sunLatitude);

    void sunLongitudeChanged(float sunLongitude);

    void sunAngleMinChanged(float sunAngleMin);

    void sunAngleMaxChanged(float sunAngleMax);

    void sunCurveChanged(float sunCurve);

    void sunEnergyChanged(float sunEnergy);

    void textureQualityChanged(SkyTextureQuality textureQuality);

private:

    struct LinearColor {

        float r = 0.0f;

        float g = 0.0f;

        float b = 0.0f;

        float a = 0.0f;

        LinearColor(const QColor &color);

        LinearColor() {}

        LinearColor interpolate(const LinearColor &color, float value) const;

        LinearColor blend(const LinearColor &color) const;

        quint32 toRGBE9995() const;

        quint32 toRGBA8() const;

        quint32 toRGBE8() const;

};

    QByteArray generateSkyTexture(int width, int height, QByteArray &imageData, bool isRGBE) const;

    void scheduleTextureUpdate();

    QColor m_skyTopColor = QColor(165, 214, 241);

    QColor m_skyHorizonColor = QColor(214, 234, 250);

    float m_skyCurve = 0.09f;

    float m_skyEnergy = 1.0f;

    QColor m_groundBottomColor = QColor(40, 47, 54);

    QColor m_groundHorizonColor = QColor(108, 101, 95);

    float m_groundCurve = 0.02f;

    float m_groundEnergy = 1.0f;

    QColor m_sunColor = QColor(255, 255, 255);

    float m_sunLatitude = 35.0f;

    float m_sunLongitude = 0.0f;

    float m_sunAngleMin = 1.0f;

    float m_sunAngleMax = 100.0f;

    float m_sunCurve = 0.05f;

    float m_sunEnergy = 1.0f;

    SkyTextureQuality m_textureQuality = SkyTextureQuality::SkyTextureQualityMedium;

};

QT_END_NAMESPACE

#endif // PROCEDURALSKYTEXTURE_H