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/****************************************************************************
**
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: http://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.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef Q3DSDEFAULTVERTEXPIPELINE_H
#define Q3DSDEFAULTVERTEXPIPELINE_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of a number of Qt sources files. This header file may change from
// version to version without notice, or even be removed.
//
// We mean it.
//
#include "q3dsmaterialshadergenerator_p.h"
QT_BEGIN_NAMESPACE
struct TessModeValues
{
enum Enum {
NoTess = 0,
TessLinear = 1,
TessPhong = 2,
TessNPatch = 3,
};
static const char *toString(Enum value)
{
switch (value) {
case NoTess:
return "NoTess";
break;
case TessLinear:
return "TessLinear";
break;
case TessPhong:
return "TessPhong";
break;
case TessNPatch:
return "TessNPatch";
break;
default:
return "NoTess";
break;
}
}
};
struct Q3DSTextureSwizzleMode
{
enum Enum {
NoSwizzle = 0,
L8toR8,
A8toR8,
L8A8toRG8,
L16toR16
};
};
class Q3DSDefaultVertexPipeline : public Q3DSAbstractShaderStageGenerator
{
protected:
virtual ~Q3DSDefaultVertexPipeline() {}
public:
// Responsible for beginning all vertex and fragment generation (void main() { etc).
virtual void beginVertexGeneration(Q3DSImage *displacementImage) = 0;
// The fragment shader expects a floating point constant, object_opacity to be defined
// post this method.
virtual void beginFragmentGeneration() = 0;
// Output variables may be mangled in some circumstances so the shader generation system
// needs an abstraction
// mechanism around this.
virtual void assignOutput(const char *varName, const char *varValueExpr) = 0;
virtual void generateUVCoords(quint32 inUVSet = 0) = 0;
virtual void generateEnvMapReflection() = 0;
virtual void generateViewVector() = 0;
// fragment shader expects varying vertex normal
// lighting in vertex pipeline expects world_normal
virtual void generateWorldNormal() = 0; // world_normal in both vert and frag shader
virtual void generateObjectNormal() = 0; // object_normal in both vert and frag shader
virtual void generateWorldPosition() = 0; // model_world_position in both vert and frag shader
virtual void generateVarTangentAndBinormal() = 0;
virtual bool hasActiveWireframe() = 0; // varEdgeDistance is a valid entity
// responsible for closing all vertex and fragment generation
virtual void endVertexGeneration() = 0;
virtual void endFragmentGeneration() = 0;
};
class Q3DSDefaultMaterialShaderGenerator : public Q3DSAbstractMaterialGenerator
{
public:
virtual void addDisplacementImageUniforms(Q3DSAbstractShaderStageGenerator &inGenerator,
const QString &displacementImageName,
Q3DSImage *displacementImage) = 0;
static Q3DSDefaultMaterialShaderGenerator &createDefaultMaterialShaderGenerator();
};
struct Q3DSVertexPipelineImpl : public Q3DSDefaultVertexPipeline
{
struct GenerationFlagValues
{
enum Enum {
UVCoords = 1,
EnvMapReflection = 1 << 1,
ViewVector = 1 << 2,
WorldNormal = 1 << 3,
ObjectNormal = 1 << 4,
WorldPosition = 1 << 5,
TangentBinormal = 1 << 6,
UVCoords1 = 1 << 7,
};
};
Q_DECLARE_FLAGS(GenerationFlags, GenerationFlagValues::Enum)
Q3DSDefaultMaterialShaderGenerator &m_MaterialGenerator;
Q3DSAbstractShaderProgramGenerator &m_ProgramGenerator;
GenerationFlags m_GenerationFlags;
QMap<QString, QString> m_InterpolationParameters;
bool m_Wireframe;
Q3DSImage *m_DisplacementImage;
QStringList m_addedFunctions;
Q3DSVertexPipelineImpl(Q3DSDefaultMaterialShaderGenerator &inMaterial,
Q3DSAbstractShaderProgramGenerator &inProgram,
bool inWireframe // only works if tessellation is true
);
// Trues true if the code was *not* set.
bool setCode(GenerationFlagValues::Enum inCode);
bool hasCode(GenerationFlagValues::Enum inCode);
Q3DSAbstractShaderProgramGenerator &programGenerator();
Q3DSAbstractShaderStageGenerator &vertex();
Q3DSAbstractShaderStageGenerator &tessControl();
Q3DSAbstractShaderStageGenerator &tessEval();
Q3DSAbstractShaderStageGenerator &geometry();
Q3DSAbstractShaderStageGenerator &fragment();
Q3DSDefaultMaterialShaderGenerator &materialGenerator();
bool hasTessellation() const;
bool hasGeometryStage() const;
bool hasDisplacment() const;
void initializeWireframeGeometryShader();
void finalizeWireframeGeometryShader();
virtual void setupTessIncludes(Q3DSShaderGeneratorStages::Enum inStage, TessModeValues::Enum inTessMode);
void generateUVCoords(quint32 inUVSet = 0) override;
void generateEnvMapReflection() override;
void generateViewVector() override;
// fragment shader expects varying vertex normal
// lighting in vertex pipeline expects world_normal
void generateWorldNormal() override;
void generateObjectNormal() override;
void generateWorldPosition() override;
void generateVarTangentAndBinormal() override;
bool hasActiveWireframe() override;
// IShaderStageGenerator interface
void addIncoming(const char *name, const char *type) override;
void addOutgoing(const char *name, const char *type) override;
void addUniform(const char *name, const char *type) override;
void addInclude(const char *name) override;
void addFunction(const char *functionName) override;
void addConstantBuffer(const char *name, const char *layout) override;
void addConstantBufferParam(const char *cbName,
const char *paramName,
const char *type) override;
Q3DSAbstractShaderStageGenerator &operator<<(const char *data) override;
void append(const char *data) override;
void appendPartial(const char *data) override;
Q3DSShaderGeneratorStages::Enum stage() const override;
virtual Q3DSAbstractShaderStageGenerator &activeStage() = 0;
virtual void addInterpolationParameter(const char *inParamName,
const char *inParamType) = 0;
virtual void doGenerateUVCoords(quint32 inUVSet) = 0;
virtual void doGenerateWorldNormal() = 0;
virtual void doGenerateObjectNormal() = 0;
virtual void doGenerateWorldPosition() = 0;
virtual void doGenerateVarTangentAndBinormal() = 0;
};
QT_END_NAMESPACE
#endif // Q3DSDEFAULTVERTEXPIPELINE_H
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