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39
40#include <QtQml/QJSValue>
41#include <QtQml/QQmlEngine>
42
43#include <Qt3DQuickRender/private/quick3dbuffer_p.h>
44#include <QtQml/private/qqmlengine_p.h>
45#include <QtQml/private/qjsvalue_p.h>
46#include <QtQml/private/qv4typedarray_p.h>
47#include <QtQml/private/qv4arraybuffer_p.h>
48#include <Qt3DRender/private/qurlhelper_p.h>
49#include <QtCore/qfile.h>
50
51QT_BEGIN_NAMESPACE
52
53namespace Qt3DRender {
54
55namespace Render {
56
57namespace Quick {
58
59namespace {
60const int jsValueTypeId = qMetaTypeId<QJSValue>();
61}
62
63Quick3DBuffer::Quick3DBuffer(Qt3DCore::QNode *parent)
64 : Qt3DRender::QBuffer(parent)
65 , m_engine(nullptr)
66 , m_v4engine(nullptr)
67{
68 QObject::connect(sender: this, signal: &Qt3DRender::QBuffer::dataChanged, receiver: this, slot: &Quick3DBuffer::bufferDataChanged);
69}
70
71QByteArray Quick3DBuffer::convertToRawData(const QJSValue &jsValue)
72{
73 initEngines();
74 Q_ASSERT(m_v4engine);
75 QV4::Scope scope(m_v4engine);
76 QV4::Scoped<QV4::TypedArray> typedArray(scope,
77 QJSValuePrivate::convertedToValue(e: m_v4engine, jsval: jsValue));
78 if (!typedArray)
79 return QByteArray();
80
81 char *dataPtr = reinterpret_cast<char *>(typedArray->arrayData()->data());
82 dataPtr += typedArray->d()->byteOffset;
83 uint byteLength = typedArray->byteLength();
84 return QByteArray(dataPtr, byteLength);
85}
86
87QVariant Quick3DBuffer::bufferData() const
88{
89 return QVariant::fromValue(value: data());
90}
91
92void Quick3DBuffer::setBufferData(const QVariant &bufferData)
93{
94 if (bufferData.userType() == QMetaType::QByteArray) {
95 QBuffer::setData(bufferData.toByteArray());
96 } else if (bufferData.userType() == jsValueTypeId) {
97 QJSValue jsValue = bufferData.value<QJSValue>();
98 QBuffer::setData(convertToRawData(jsValue));
99 }
100}
101
102void Quick3DBuffer::updateData(int offset, const QVariant &bufferData)
103{
104 if (bufferData.userType() == QMetaType::QByteArray) {
105 QBuffer::updateData(offset, bytes: bufferData.toByteArray());
106 } else if (bufferData.userType() == jsValueTypeId) {
107 QJSValue jsValue = bufferData.value<QJSValue>();
108 QBuffer::updateData(offset, bytes: convertToRawData(jsValue));
109 }
110}
111
112/*!
113 \qmlmethod string Quick3DBuffer::readBinaryFile(url &fileUrl)
114
115 Reads the binary at \a fileUrl and return it as a QByteArray wrapped in a
116 QVariant
117
118 \note this is provided as convenience for QML where reading files and creating
119 QByteArray is not possible
120 */
121QVariant Quick3DBuffer::readBinaryFile(const QUrl &fileUrl)
122{
123 QFile f(Qt3DRender::QUrlHelper::urlToLocalFileOrQrc(url: fileUrl));
124 QByteArray data;
125
126 if (f.open(flags: QIODevice::ReadOnly))
127 data = f.readAll();
128 return QVariant(data);
129}
130
131void Quick3DBuffer::initEngines()
132{
133 if (m_engine == nullptr) {
134 m_engine = qmlEngine(parent());
135 m_v4engine = QQmlEnginePrivate::getV4Engine(e: m_engine);
136 }
137}
138
139} // Quick
140
141} // Render
142
143} // Qt3DRender
144
145QT_END_NAMESPACE
146

source code of qt3d/src/quick3d/quick3drender/items/quick3dbuffer.cpp