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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_SHADER_CODE_GENERATOR_H
#define QT3DS_RENDER_SHADER_CODE_GENERATOR_H
#include "Qt3DSRender.h"
#include "foundation/Qt3DSContainers.h"
#include "EASTL/string.h"
#include "foundation/StringTable.h"
#include "render/Qt3DSRenderBaseTypes.h"
#include "Qt3DSRenderString.h"
namespace qt3ds {
namespace render {
struct SEndlType
{
};
extern SEndlType Endl;
typedef std::basic_string<char> TStrType;
typedef eastl::pair<CRegisteredString, CRegisteredString> TParamPair;
typedef eastl::pair<CRegisteredString, TParamPair> TConstantBufferParamPair;
typedef nvvector<TConstantBufferParamPair> TConstantBufferParamArray;
typedef nvhash_map<CRegisteredString, CRegisteredString> TStrTableStrMap;
struct SShaderCodeGeneratorBase
{
enum Enum {
Unknown = 0,
Lighting,
ViewVector,
WorldNormal,
WorldPosition,
EnvMapReflection,
UVCoords,
};
IStringTable &m_StringTable;
nvhash_set<QT3DSU32> m_Codes; // set of enums we have included.
nvhash_set<CRegisteredString> m_Includes;
TStrTableStrMap m_Uniforms;
TStrTableStrMap m_ConstantBuffers;
TConstantBufferParamArray m_ConstantBufferParams;
TStrTableStrMap m_Attributes;
CRenderString m_FinalShaderBuilder;
TStrType m_CodeBuilder;
qt3ds::render::NVRenderContextType m_RenderContextType;
SShaderCodeGeneratorBase(IStringTable &inStringTable, NVAllocatorCallback &alloc,
qt3ds::render::NVRenderContextType ctxType);
virtual TStrTableStrMap &GetVaryings() = 0;
void Begin();
void Append(const char *data);
// don't add the newline
void AppendPartial(const char *data);
void AddConstantBuffer(const char *name, const char *layout);
void AddConstantBufferParam(const char *cbName, const char *paramName, const char *type);
void AddUniform(const char *name, const char *type);
void AddUniform(TStrType &name, const char *type);
void AddAttribute(const char *name, const char *type);
void AddAttribute(TStrType &name, const char *type);
void AddVarying(const char *name, const char *type);
void AddVarying(TStrType &name, const char *type);
void AddLocalVariable(const char *name, const char *type, int tabCount = 1);
void AddLocalVariable(TStrType &name, const char *type, int tabCount = 1);
void AddInclude(const char *name);
void AddInclude(TStrType &name);
bool HasCode(Enum value);
void SetCode(Enum value);
void SetupWorldPosition();
void GenerateViewVector();
void GenerateWorldNormal();
void GenerateEnvMapReflection(SShaderCodeGeneratorBase &inFragmentShader);
void GenerateUVCoords();
void GenerateTextureSwizzle(NVRenderTextureSwizzleMode::Enum swizzleMode,
eastl::basic_string<char8_t> &texSwizzle,
eastl::basic_string<char8_t> &lookupSwizzle);
void GenerateShadedWireframeBase();
void AddLighting();
const char *BuildShaderSource();
SShaderCodeGeneratorBase &operator<<(const char *data);
SShaderCodeGeneratorBase &operator<<(const TStrType &data);
SShaderCodeGeneratorBase &operator<<(const SEndlType & /*data*/);
protected:
virtual void AddShaderItemMap(const char *itemType, const TStrTableStrMap &itemMap);
void AddShaderConstantBufferItemMap(const char *itemType, const TStrTableStrMap &cbMap,
TConstantBufferParamArray cbParamsArray);
};
struct SShaderVertexCodeGenerator : public SShaderCodeGeneratorBase
{
TStrTableStrMap m_Varyings;
SShaderVertexCodeGenerator(IStringTable &inStringTable, NVAllocatorCallback &alloc,
qt3ds::render::NVRenderContextType ctxType);
TStrTableStrMap &GetVaryings() override;
};
struct SShaderTessControlCodeGenerator : public SShaderCodeGeneratorBase
{
SShaderVertexCodeGenerator &m_VertGenerator;
TStrTableStrMap m_Varyings;
SShaderTessControlCodeGenerator(SShaderVertexCodeGenerator &vert,
NVAllocatorCallback &alloc,
qt3ds::render::NVRenderContextType ctxType);
void AddShaderItemMap(const char *itemType, const TStrTableStrMap &itemMap) override;
TStrTableStrMap &GetVaryings() override;
};
struct SShaderTessEvalCodeGenerator : public SShaderCodeGeneratorBase
{
SShaderTessControlCodeGenerator &m_TessControlGenerator;
bool m_hasGeometryStage;
SShaderTessEvalCodeGenerator(SShaderTessControlCodeGenerator &tc,
NVAllocatorCallback &alloc,
qt3ds::render::NVRenderContextType ctxType);
void AddShaderItemMap(const char *itemType, const TStrTableStrMap &itemMap) override;
TStrTableStrMap &GetVaryings() override;
virtual void SetGeometryStage(bool hasGeometryStage);
};
struct SShaderGeometryCodeGenerator : public SShaderCodeGeneratorBase
{
SShaderVertexCodeGenerator &m_VertGenerator;
bool m_hasTessellationStage;
SShaderGeometryCodeGenerator(SShaderVertexCodeGenerator &vert, NVAllocatorCallback &alloc,
qt3ds::render::NVRenderContextType ctxType);
void AddShaderItemMap(const char *itemType, const TStrTableStrMap &itemMap) override;
TStrTableStrMap &GetVaryings() override;
virtual void SetTessellationStage(bool hasTessellationStage);
};
struct SShaderFragmentCodeGenerator : public SShaderCodeGeneratorBase
{
SShaderVertexCodeGenerator &m_VertGenerator;
SShaderFragmentCodeGenerator(SShaderVertexCodeGenerator &vert, NVAllocatorCallback &alloc,
qt3ds::render::NVRenderContextType ctxType);
TStrTableStrMap &GetVaryings() override;
};
}
}
#endif
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