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// Copyright (C) 2008-2012 NVIDIA Corporation.
// Copyright (C) 2019 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#ifndef QSSG_RENDER_SHADOW_MAP_H
#define QSSG_RENDER_SHADOW_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 <QtGui/QMatrix4x4>
#include <QtGui/QVector3D>
#include <QtQuick3DUtils/private/qssgrenderbasetypes_p.h>
#include <QtQuick3DRuntimeRender/private/qssgrenderableobjects_p.h>
QT_BEGIN_NAMESPACE
class QSSGRhiContext;
class QSSGRenderContextInterface;
class QRhiRenderBuffer;
class QRhiTextureRenderTarget;
class QRhiRenderPassDescriptor;
class QRhiTexture;
enum class ShadowMapModes
{
VSM, ///< variance shadow mapping
CUBE, ///< cubemap omnidirectional shadows
};
struct QSSGShadowMapEntry
{
QSSGShadowMapEntry();
static QSSGShadowMapEntry withRhiDepthMap(quint32 lightIdx, ShadowMapModes mode, QRhiTexture *textureArray);
static QSSGShadowMapEntry withRhiDepthCubeMap(quint32 lightIdx, ShadowMapModes mode, QRhiTexture *depthCube, QRhiRenderBuffer *depthStencil);
bool isCompatible(QSize mapSize, quint32 layerIndex, quint32 csmNumSplits, ShadowMapModes mapMode, QRhiTexture::Format textureFormat);
void destroyRhiResources();
quint32 m_lightIndex; ///< the light index it belongs to
ShadowMapModes m_shadowMapMode; ///< shadow map method
quint32 m_depthArrayIndex; ///< shadow map texture array index
// RHI resources
QRhiTexture *m_rhiDepthTextureArray = nullptr; // for shadow map (VSM) (not owned)
QRhiTexture *m_rhiDepthCube = nullptr; // shadow cube map (CUBE)
std::array<QRhiRenderBuffer *, 4> m_rhiDepthStencil = {}; // depth/stencil
std::array<QRhiTextureRenderTarget *, 6> m_rhiRenderTargets = {}; // texture RT
std::array<QRhiRenderPassDescriptor *, 4> m_rhiRenderPassDesc = {}; // texture RT renderpass descriptor
QMatrix4x4 m_lightViewProjection[4]; ///< light view projection matrix
QMatrix4x4 m_lightCubeView[6]; ///< light cubemap view matrices
QMatrix4x4 m_lightView; ///< light view transform
quint32 m_csmNumSplits = 0;
float m_csmSplits[4] = {};
float m_csmActive[4] = {};
float m_shadowMapFar = 0.f;
};
class Q_QUICK3DRUNTIMERENDER_EXPORT QSSGRenderShadowMap
{
Q_DISABLE_COPY(QSSGRenderShadowMap)
public:
const QSSGRenderContextInterface &m_context;
explicit QSSGRenderShadowMap(const QSSGRenderContextInterface &inContext);
~QSSGRenderShadowMap();
void releaseCachedResources();
void addShadowMaps(const QSSGShaderLightList &renderableLights);
QSSGShadowMapEntry *shadowMapEntry(int lightIdx);
qsizetype shadowMapEntryCount() { return m_shadowMapList.size(); }
private:
QSSGShadowMapEntry *addDirectionalShadowMap(qint32 lightIdx,
QSize size,
bool use32bit,
quint32 layerStartIndex,
quint32 csmNumSplits,
const QString &renderNodeObjName);
QSSGShadowMapEntry *addCubeShadowMap(qint32 lightIdx, QSize size, bool use32bit, const QString &renderNodeObjName);
QVector<QSSGShadowMapEntry> m_shadowMapList;
std::array<QHash<QSize, QRhiTexture *>, 2> m_depthTextureArrays; // 0: 16 bit, 1: 32 bit
};
using QSSGRenderShadowMapPtr = std::shared_ptr<QSSGRenderShadowMap>;
QT_END_NAMESPACE
#endif
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