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/****************************************************************************
**
** Copyright (C) 2008-2012 NVIDIA Corporation.
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt 3D Studio.
**
** $QT_BEGIN_LICENSE:GPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#pragma once
#ifndef QT3DS_RENDER_SHADOW_MAP_H
#define QT3DS_RENDER_SHADOW_MAP_H
#include "Qt3DSRenderContextCore.h"
#include "foundation/Qt3DSAtomic.h"
#include "foundation/Qt3DSMat44.h"
#include "foundation/Qt3DSVec3.h"
#include "foundation/Qt3DSFlags.h"
#include "foundation/StringTable.h"
#include "render/Qt3DSRenderBaseTypes.h"
#include "render/Qt3DSRenderTexture2D.h"
#ifdef _INTEGRITYPLATFORM
#include "render/Qt3DSRenderTextureCube.h"
#endif
namespace qt3ds {
namespace render {
struct SLayerRenderData;
struct ShadowMapModes
{
enum Enum {
SSM, ///< standard shadow mapping
VSM, ///< variance shadow mapping
CUBE, ///< cubemap omnidirectional shadows
};
};
struct ShadowFilterValues
{
enum Enum {
NONE = 1 << 0, ///< hard shadows
PCF = 1 << 1, ///< Percentage close filtering
BLUR = 1 << 2, ///< Gausian Blur
};
};
struct SShadowMapEntry
{
SShadowMapEntry()
: m_LightIndex(QT3DS_MAX_U32)
, m_ShadowMapMode(ShadowMapModes::SSM)
, m_ShadowFilterFlags(ShadowFilterValues::NONE)
{
}
SShadowMapEntry(QT3DSU32 index, ShadowMapModes::Enum mode, ShadowFilterValues::Enum filter,
NVRenderTexture2D &depthMap, NVRenderTexture2D &depthCopy,
NVRenderTexture2D &depthTemp)
: m_LightIndex(index)
, m_ShadowMapMode(mode)
, m_ShadowFilterFlags(filter)
, m_DepthMap(depthMap)
, m_DepthCopy(depthCopy)
, m_DepthCube(NULL)
, m_CubeCopy(NULL)
, m_DepthRender(depthTemp)
{
}
SShadowMapEntry(QT3DSU32 index, ShadowMapModes::Enum mode, ShadowFilterValues::Enum filter,
NVRenderTextureCube &depthCube, NVRenderTextureCube &cubeTmp,
NVRenderTexture2D &depthTemp)
: m_LightIndex(index)
, m_ShadowMapMode(mode)
, m_ShadowFilterFlags(filter)
, m_DepthMap(NULL)
, m_DepthCopy(NULL)
, m_DepthCube(depthCube)
, m_CubeCopy(cubeTmp)
, m_DepthRender(depthTemp)
{
}
QT3DSU32 m_LightIndex; ///< the light index it belongs to
ShadowMapModes::Enum m_ShadowMapMode; ///< shadow map method
ShadowFilterValues::Enum m_ShadowFilterFlags; ///< shadow filter mode
// PKC : Adding the DepthRender buffer allows us to have a depth+stencil format when filling
// the shadow maps (depth+stencil is necessary), but use a more compact format for the
// actual
// shadow map used at shade time. See if it's worth adding.
NVScopedRefCounted<NVRenderTexture2D> m_DepthMap; ///< shadow map texture
NVScopedRefCounted<NVRenderTexture2D>
m_DepthCopy; ///< shadow map buffer used during blur passes
NVScopedRefCounted<NVRenderTextureCube> m_DepthCube; ///< shadow cube map
NVScopedRefCounted<NVRenderTextureCube>
m_CubeCopy; ///< cube map buffer used during the blur passes
NVScopedRefCounted<NVRenderTexture2D>
m_DepthRender; ///< shadow depth+stencil map used during rendering
QT3DSMat44 m_LightVP; ///< light view projection matrix
QT3DSMat44 m_LightCubeView[6]; ///< light cubemap view matrices
QT3DSMat44 m_LightView; ///< light view transform
};
class Qt3DSShadowMap : public NVRefCounted
{
typedef nvvector<SShadowMapEntry> TShadowMapEntryList;
public:
IQt3DSRenderContext &m_Context;
volatile QT3DSI32 mRefCount;
public:
Qt3DSShadowMap(IQt3DSRenderContext &inContext);
~Qt3DSShadowMap();
QT3DS_IMPLEMENT_REF_COUNT_ADDREF_RELEASE(m_Context.GetAllocator())
/*
* @brief Add a shadow map entry
* This creates a new shadow map if it does not exist or changed
*
* @param[in] index shadow map entry index
* @param[in] width shadow map width
* @param[in] height shadow map height
* @param[in] format shadow map format
* @param[in] samples shadow map sample count
* @param[in] mode shadow map mode like SSM, VCM
* @param[in] filter soft shadow map mode filter like PCF
*
* @ return no return
*/
void AddShadowMapEntry(QT3DSU32 index, QT3DSU32 width, QT3DSU32 height,
NVRenderTextureFormats::Enum format, QT3DSU32 samples,
ShadowMapModes::Enum mode, ShadowFilterValues::Enum filter);
/*
* @brief Get a shadow map entry
*
* @param[in] index shadow map entry index
*
* @ return shadow map entry or NULL
*/
SShadowMapEntry *GetShadowMapEntry(QT3DSU32 index);
/*
* @brief Get shadow map entry count
*
* @ return count of shadow map entries
*/
QT3DSU32 GetShadowMapEntryCount() { return m_ShadowMapList.size(); }
static Qt3DSShadowMap *Create(IQt3DSRenderContext &inContext);
private:
TShadowMapEntryList m_ShadowMapList; ///< List of shadow map entries
};
}
}
#endif
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