qssgrenderreflectionmap_p.h

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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
 
#ifndef QSSG_RENDER_REFLECTION_MAP_H
#define QSSG_RENDER_REFLECTION_MAP_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 <QtQuick3DRuntimeRender/private/qtquick3druntimerenderglobal_p.h>
#include <QtQuick3DRuntimeRender/private/qssgrenderreflectionprobe_p.h>
 
QT_BEGIN_NAMESPACE
 
class QRhi;
class QRhiCommandBuffer;
class QSSGRhiContext;
class QSSGRenderContextInterface;
 
class QRhiRenderBuffer;
class QRhiTextureRenderTarget;
class QRhiRenderPassDescriptor;
class QRhiTexture;
class QRhiGraphicsPipeline;
class QRhiShaderResourceBindings;
class QRhiBuffer;
 
struct QSSGReflectionMapEntry
{
    QSSGReflectionMapEntry();
 
    static QSSGReflectionMapEntry withRhiTexturedCubeMap(quint32 probeIdx,
                                                         QRhiTexture *preFiltered);
    static QSSGReflectionMapEntry withRhiCubeMap(quint32 probeIdx,
                                                 QRhiTexture *cube,
                                                 QRhiTexture *prefiltered,
                                                 QRhiRenderBuffer *depthStencil);
 
    void renderMips(QSSGRhiContext *context);
    void destroyRhiResources();
 
    quint32 m_probeIndex;
 
    // RHI resources
    QRhiTexture *m_rhiCube = nullptr;
    QRhiTexture *m_rhiPrefilteredCube = nullptr;
    QRhiRenderBuffer *m_rhiDepthStencil = nullptr;
    QVarLengthArray<QRhiTextureRenderTarget *, 6> m_rhiRenderTargets;
    QRhiRenderPassDescriptor *m_rhiRenderPassDesc = nullptr;
 
    QRhiGraphicsPipeline *m_prefilterPipeline = nullptr;
    QRhiGraphicsPipeline *m_irradiancePipeline = nullptr;
    QRhiShaderResourceBindings *m_prefilterSrb = nullptr;
    QRhiShaderResourceBindings *m_irradianceSrb = nullptr;
    QRhiBuffer *m_prefilterVertBuffer = nullptr;
    QRhiBuffer *m_prefilterFragBuffer = nullptr;
    QRhiBuffer *m_irradianceFragBuffer = nullptr;
    QMap<int, QVarLengthArray<QRhiTextureRenderTarget *, 6>> m_rhiPrefilterRenderTargetsMap;
    QRhiRenderPassDescriptor *m_rhiPrefilterRenderPassDesc = nullptr;
    QMap<int, QSize> m_prefilterMipLevelSizes;
 
    QVarLengthArray<QRhiShaderResourceBindings *, 6> m_skyBoxSrbs;
 
    QMatrix4x4 m_viewProjection;
 
    bool m_needsRender = false;
    bool m_rendered = false;
 
    QSSGRenderReflectionProbe::ReflectionTimeSlicing m_timeSlicing = QSSGRenderReflectionProbe::ReflectionTimeSlicing::None;
    int m_timeSliceFrame = 1;
    QSSGRenderTextureCubeFace m_timeSliceFace = { QSSGRenderTextureCubeFaces[0] };
    Q_QUICK3D_PROFILE_ID
};
 
class Q_QUICK3DRUNTIMERENDER_EXPORT QSSGRenderReflectionMap
{
    typedef QVector<QSSGReflectionMapEntry> TReflectionMapEntryList;
    Q_DISABLE_COPY(QSSGRenderReflectionMap)
 
public:
    const QSSGRenderContextInterface &m_context;
 
    explicit QSSGRenderReflectionMap(const QSSGRenderContextInterface &inContext);
    ~QSSGRenderReflectionMap();
    void releaseCachedResources();
 
    void addReflectionMapEntry(qint32 probeIdx, const QSSGRenderReflectionProbe &probe);
    void addTexturedReflectionMapEntry(qint32 probeIdx, const QSSGRenderReflectionProbe &probe);
 
    QSSGReflectionMapEntry *reflectionMapEntry(int probeIdx);
 
    qint32 reflectionMapEntryCount() { return m_reflectionMapList.size(); }
 
private:
    TReflectionMapEntryList m_reflectionMapList;
};
 
using QSSGRenderReflectionMapPtr = std::shared_ptr<QSSGRenderReflectionMap>;
 
QT_END_NAMESPACE
 
#endif