1// Copyright (C) 2017 Klaralvdalens Datakonsult AB (KDAB).
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
3
4#ifndef GLTFGEOMETRYLOADER_H
5#define GLTFGEOMETRYLOADER_H
6
7//
8// W A R N I N G
9// -------------
10//
11// This file is not part of the Qt API. It exists for the convenience
12// of other Qt classes. This header file may change from version to
13// version without notice, or even be removed.
14//
15// We mean it.
16//
17
18#include <QtCore/QHash>
19#include <QtCore/QJsonDocument>
20
21#include <Qt3DRender/private/qgeometryloaderinterface_p.h>
22#include <Qt3DCore/qattribute.h>
23#include <Qt3DCore/qbuffer.h>
24
25#include <private/qlocale_tools_p.h>
26
27QT_BEGIN_NAMESPACE
28
29namespace Qt3DCore {
30class QGeometry;
31}
32
33namespace Qt3DRender {
34
35#define GLTFGEOMETRYLOADER_EXT QLatin1String("gltf")
36#define JSONGEOMETRYLOADER_EXT QLatin1String("json")
37#define QGLTFGEOMETRYLOADER_EXT QLatin1String("qgltf")
38
39class QCamera;
40class QCameraLens;
41class QMaterial;
42class QShaderProgram;
43class QEffect;
44class QAbstractTexture;
45class QRenderState;
46class QTechnique;
47class QParameter;
48class QGeometryRenderer;
49
50class GLTFGeometryLoader : public QGeometryLoaderInterface
51{
52 class BufferData
53 {
54 public:
55 BufferData();
56 explicit BufferData(const QJsonObject &json);
57
58 quint64 length;
59 QString path;
60 QByteArray *data;
61 // type if ever useful
62 };
63
64 class ParameterData
65 {
66 public:
67 ParameterData();
68 explicit ParameterData(const QJsonObject &json);
69
70 QString semantic;
71 int type;
72 };
73
74 class AccessorData
75 {
76 public:
77 AccessorData();
78 explicit AccessorData(const QJsonObject &json);
79
80 QString bufferViewName;
81 int bufferViewIndex;
82 Qt3DCore::QAttribute::VertexBaseType type;
83 uint dataSize;
84 int count;
85 int offset;
86 int stride;
87 };
88
89 struct Gltf1
90 {
91 QHash<QString, AccessorData> m_accessorDict;
92 QHash<QString, BufferData> m_bufferDatas;
93 QHash<QString, Qt3DCore::QBuffer*> m_buffers;
94 };
95
96 struct Gltf2
97 {
98 QVector<BufferData> m_bufferDatas;
99 QVector<Qt3DCore::QBuffer*> m_buffers;
100 QVector<AccessorData> m_accessors;
101 };
102
103 Q_OBJECT
104public:
105 GLTFGeometryLoader();
106 ~GLTFGeometryLoader();
107
108 Qt3DCore::QGeometry *geometry() const final;
109
110 bool load(QIODevice *ioDev, const QString &subMesh = QString()) final;
111
112protected:
113 void setBasePath(const QString &path);
114 bool setJSON(const QJsonDocument &json);
115
116 static QString standardAttributeNameFromSemantic(const QString &semantic);
117
118 void parse();
119 void parseGLTF1();
120 void parseGLTF2();
121 void cleanup();
122
123 void processJSONBuffer(const QString &id, const QJsonObject &json);
124 void processJSONBufferView(const QString &id, const QJsonObject &json);
125 void processJSONAccessor(const QString &id, const QJsonObject &json);
126 void processJSONMesh(const QString &id, const QJsonObject &json);
127
128 void loadBufferData();
129 void unloadBufferData();
130
131 void processJSONBufferV2(const QJsonObject &json);
132 void processJSONBufferViewV2(const QJsonObject &json);
133 void processJSONAccessorV2(const QJsonObject &json);
134 void processJSONMeshV2(const QJsonObject &json);
135
136 void loadBufferDataV2();
137 void unloadBufferDataV2();
138
139 QByteArray resolveLocalData(const QString &path) const;
140
141 static Qt3DCore::QAttribute::VertexBaseType accessorTypeFromJSON(int componentType);
142 static uint accessorDataSizeFromJson(const QString &type);
143
144private:
145 QJsonDocument m_json;
146 QString m_basePath;
147 QString m_mesh;
148
149 Gltf1 m_gltf1;
150 Gltf2 m_gltf2;
151
152 Qt3DCore::QGeometry *m_geometry;
153};
154
155} // namespace Qt3DRender
156
157QT_END_NAMESPACE
158
159#endif // GLTFGEOMETRYLOADER_H
160

source code of qt3d/src/plugins/geometryloaders/gltf/gltfgeometryloader.h