qsgrhishadereffectnode_p.h

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// Copyright (C) 2019 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

// Qt-Security score:significant reason:default

#ifndef QSGRHISHADEREFFECTNODE_P_H

#define QSGRHISHADEREFFECTNODE_P_H

//

//  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.

//

#include <private/qsgadaptationlayer_p.h>

#include <qsgmaterial.h>

#include <QUrl>

QT_BEGIN_NAMESPACE

class QSGDefaultRenderContext;

class QSGPlainTexture;

class QSGRhiShaderEffectNode;

class QFileSelector;

class QSGRhiShaderLinker

public:

    void reset(const QShader &vs, const QShader &fs);

    void feedConstants(const QSGShaderEffectNode::ShaderData &shader, const QSet<int> *dirtyIndices = nullptr);

    void feedSamplers(const QSGShaderEffectNode::ShaderData &shader, const QSet<int> *dirtyIndices = nullptr);

    void linkTextureSubRects();

    void dump();

    struct Constant {

        uint size;

        QSGShaderEffectNode::VariableData::SpecialType specialType;

        QVariant value;

        bool operator==(const Constant &other) const {

            return size == other.size && specialType == other.specialType

                    && (specialType == QSGShaderEffectNode::VariableData::None ? value == other.value : true);

};

    bool m_error;

    QShader m_vs;

    QShader m_fs;

    QHash<uint, Constant> m_constants; // offset -> Constant

    QHash<int, QVariant> m_samplers; // binding -> value (source ref)

    QHash<QByteArray, int> m_samplerNameMap; // name -> binding

    QSet<int> m_subRectBindings;

};

QDebug operator<<(QDebug debug, const QSGRhiShaderLinker::Constant &c);

class QSGRhiShaderEffectMaterial : public QSGMaterial

public:

    QSGRhiShaderEffectMaterial(QSGRhiShaderEffectNode *node);

    ~QSGRhiShaderEffectMaterial();

    int compare(const QSGMaterial *other) const override;

    QSGMaterialType *type() const override;

    QSGMaterialShader *createShader(QSGRendererInterface::RenderMode renderMode) const override;

    void updateTextureProviders(bool layoutChange);

    bool usesSubRectUniform(int binding) const { return m_linker.m_subRectBindings.contains(binding); }

    static const int MAX_BINDINGS = 32;

    QSGRhiShaderEffectNode *m_node;

    QSGMaterialType *m_materialType = nullptr;

    void *m_materialTypeCacheKey = nullptr;

    QSGRhiShaderLinker m_linker;

    QList<QSGTextureProvider *> m_textureProviders; // [binding] = QSGTextureProvider

    bool m_geometryUsesTextureSubRect = false;

    QSGShaderEffectNode::CullMode m_cullMode = QSGShaderEffectNode::NoCulling;

    bool m_hasCustomVertexShader = false;

    bool m_hasCustomFragmentShader = false;

    QShader m_vertexShader;

    QShader m_fragmentShader;

    QSGPlainTexture *m_dummyTexture = nullptr;

};

class QSGRhiShaderEffectNode : public QSGShaderEffectNode

    Q_OBJECT

public:

    QSGRhiShaderEffectNode(QSGDefaultRenderContext *rc);

    QRectF updateNormalizedTextureSubRect(bool supportsAtlasTextures) override;

    void syncMaterial(SyncData *syncData) override;

    void preprocess() override;

    static void resetMaterialTypeCache(void *materialTypeCacheKey);

    static void garbageCollectMaterialTypeCache(void *materialTypeCacheKey);

private Q_SLOTS:

    void handleTextureChange();

    void handleTextureProviderDestroyed(QObject *object);

private:

    QSGRhiShaderEffectMaterial m_material;

};

class QSGRhiGuiThreadShaderEffectManager : public QSGGuiThreadShaderEffectManager

public:

    bool hasSeparateSamplerAndTextureObjects() const override;

    QString log() const override;

    Status status() const override;

    void prepareShaderCode(ShaderInfo::Type typeHint, const QUrl &src, ShaderInfo *result) override;

private:

    bool reflect(ShaderInfo *result);

    Status m_status = Uncompiled;

    QFileSelector *m_fileSelector = nullptr;

};

QT_END_NAMESPACE

#endif // QSGRHISHADEREFFECTNODE_P_H