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/****************************************************************************
**
** Copyright (C) 2017 Klaralvdalens Datakonsult AB (KDAB).
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt3D module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or 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.GPL2 and 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-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef GLTFGEOMETRYLOADER_H
#define GLTFGEOMETRYLOADER_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of other Qt classes. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <QtCore/QJsonDocument>
#include <Qt3DRender/private/qgeometryloaderinterface_p.h>
#include <Qt3DRender/qattribute.h>
#include <Qt3DRender/qbuffer.h>
#include <private/qlocale_tools_p.h>
QT_BEGIN_NAMESPACE
namespace Qt3DRender {
#define GLTFGEOMETRYLOADER_EXT QLatin1String("gltf")
#define JSONGEOMETRYLOADER_EXT QLatin1String("json")
#define QGLTFGEOMETRYLOADER_EXT QLatin1String("qgltf")
class QCamera;
class QCameraLens;
class QMaterial;
class QShaderProgram;
class QEffect;
class QAbstractTexture;
class QRenderState;
class QTechnique;
class QParameter;
class QGeometryRenderer;
class QGeometry;
class GLTFGeometryLoader : public QGeometryLoaderInterface
{
class BufferData
{
public:
BufferData();
explicit BufferData(const QJsonObject &json);
quint64 length;
QString path;
QByteArray *data;
// type if ever useful
};
class ParameterData
{
public:
ParameterData();
explicit ParameterData(const QJsonObject &json);
QString semantic;
int type;
};
class AccessorData
{
public:
AccessorData();
explicit AccessorData(const QJsonObject &json);
QString bufferViewName;
int bufferViewIndex;
QAttribute::VertexBaseType type;
uint dataSize;
int count;
int offset;
int stride;
};
struct Gltf1
{
QHash<QString, AccessorData> m_accessorDict;
QHash<QString, BufferData> m_bufferDatas;
QHash<QString, Qt3DRender::QBuffer*> m_buffers;
};
struct Gltf2
{
QVector<BufferData> m_bufferDatas;
QVector<Qt3DRender::QBuffer*> m_buffers;
QVector<AccessorData> m_accessors;
};
Q_OBJECT
public:
GLTFGeometryLoader();
~GLTFGeometryLoader();
QGeometry *geometry() const final;
bool load(QIODevice *ioDev, const QString &subMesh = QString()) final;
protected:
void setBasePath(const QString &path);
bool setJSON(const QJsonDocument &json);
static QString standardAttributeNameFromSemantic(const QString &semantic);
void parse();
void parseGLTF1();
void parseGLTF2();
void cleanup();
void processJSONBuffer(const QString &id, const QJsonObject &json);
void processJSONBufferView(const QString &id, const QJsonObject &json);
void processJSONAccessor(const QString &id, const QJsonObject &json);
void processJSONMesh(const QString &id, const QJsonObject &json);
void loadBufferData();
void unloadBufferData();
void processJSONBufferV2(const QJsonObject &json);
void processJSONBufferViewV2(const QJsonObject &json);
void processJSONAccessorV2(const QJsonObject &json);
void processJSONMeshV2(const QJsonObject &json);
void loadBufferDataV2();
void unloadBufferDataV2();
QByteArray resolveLocalData(const QString &path) const;
static QAttribute::VertexBaseType accessorTypeFromJSON(int componentType);
static uint accessorDataSizeFromJson(const QString &type);
private:
QJsonDocument m_json;
QString m_basePath;
QString m_mesh;
Gltf1 m_gltf1;
Gltf2 m_gltf2;
QGeometry *m_geometry;
};
} // namespace Qt3DRender
QT_END_NAMESPACE
#endif // GLTFGEOMETRYLOADER_H
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