| /**************************************************************************** |
| ** |
| ** Copyright (C) 2015 Paul Lemire paul.lemire350@gmail.com |
| ** 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 |
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| ** 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 |
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| ** packaging of this file. Please review the following information to |
| ** ensure the GNU Lesser General Public License version 3 requirements |
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| ** |
| ** 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 |
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| ** $QT_END_LICENSE$ |
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| ****************************************************************************/ |
| |
| #ifndef QT3DRENDER_RENDER_VISITORUTILS_P_H |
| #define QT3DRENDER_RENDER_VISITORUTILS_P_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 <QtGlobal> |
| |
| QT_BEGIN_NAMESPACE |
| |
| namespace Qt3DRender { |
| |
| namespace Render { |
| |
| namespace Visitor { |
| |
| template <QAttribute::VertexBaseType> struct EnumToType; |
| template <> struct EnumToType<QAttribute::Byte> { typedef const char type; }; |
| template <> struct EnumToType<QAttribute::UnsignedByte> { typedef const uchar type; }; |
| template <> struct EnumToType<QAttribute::Short> { typedef const short type; }; |
| template <> struct EnumToType<QAttribute::UnsignedShort> { typedef const ushort type; }; |
| template <> struct EnumToType<QAttribute::Int> { typedef const int type; }; |
| template <> struct EnumToType<QAttribute::UnsignedInt> { typedef const uint type; }; |
| template <> struct EnumToType<QAttribute::Float> { typedef const float type; }; |
| template <> struct EnumToType<QAttribute::Double> { typedef const double type; }; |
| |
| template<QAttribute::VertexBaseType v> |
| inline typename EnumToType<v>::type *castToType(const QByteArray &u, uint byteOffset) |
| { |
| return reinterpret_cast< typename EnumToType<v>::type *>(u.constData() + byteOffset); |
| } |
| |
| template<typename Func> |
| void processBuffer(const BufferInfo &info, Func &f) |
| { |
| switch (info.type) { |
| case QAttribute::Byte: f(info, castToType<QAttribute::Byte>(info.data, info.byteOffset)); |
| return; |
| case QAttribute::UnsignedByte: f(info, castToType<QAttribute::UnsignedByte>(info.data, info.byteOffset)); |
| return; |
| case QAttribute::Short: f(info, castToType<QAttribute::Short>(info.data, info.byteOffset)); |
| return; |
| case QAttribute::UnsignedShort: f(info, castToType<QAttribute::UnsignedShort>(info.data, info.byteOffset)); |
| return; |
| case QAttribute::Int: f(info, castToType<QAttribute::Int>(info.data, info.byteOffset)); |
| return; |
| case QAttribute::UnsignedInt: f(info, castToType<QAttribute::UnsignedInt>(info.data, info.byteOffset)); |
| return; |
| case QAttribute::Float: f(info, castToType<QAttribute::Float>(info.data, info.byteOffset)); |
| return; |
| case QAttribute::Double: f(info, castToType<QAttribute::Double>(info.data, info.byteOffset)); |
| return; |
| default: |
| return; |
| } |
| } |
| |
| template<typename VertexExecutor, typename IndexExecutor, typename Visitor> |
| void visitPrimitives(NodeManagers *manager, const GeometryRenderer *renderer, Visitor* visitor) |
| { |
| Geometry *geom = manager->lookupResource<Geometry, GeometryManager>(renderer->geometryId()); |
| Attribute *positionAttribute = nullptr; |
| Attribute *indexAttribute = nullptr; |
| Buffer *positionBuffer = nullptr; |
| Buffer *indexBuffer = nullptr; |
| |
| auto updateStride = [](BufferInfo &info, int stride) { |
| if (stride) { |
| info.byteStride = stride; |
| return; |
| } |
| switch (info.type) { |
| case QAttribute::Byte: info.byteStride = sizeof(qint8) * info.dataSize; return; |
| case QAttribute::UnsignedByte: info.byteStride = sizeof(quint8) * info.dataSize; return; |
| case QAttribute::Short: info.byteStride = sizeof(qint16) * info.dataSize; return; |
| case QAttribute::UnsignedShort: info.byteStride = sizeof(quint16) * info.dataSize; return; |
| case QAttribute::Int: info.byteStride = sizeof(qint32) * info.dataSize; return; |
| case QAttribute::UnsignedInt: info.byteStride = sizeof(quint32) * info.dataSize; return; |
| case QAttribute::Float: info.byteStride = sizeof(float) * info.dataSize; return; |
| case QAttribute::Double: info.byteStride = sizeof(double) * info.dataSize; return; |
| default: return; |
| } |
| }; |
| |
| if (geom) { |
| Qt3DRender::Render::Attribute *attribute = nullptr; |
| const auto attrIds = geom->attributes(); |
| for (const Qt3DCore::QNodeId attrId : attrIds) { |
| attribute = manager->lookupResource<Attribute, AttributeManager>(attrId); |
| if (attribute){ |
| if (!positionAttribute && attribute->name() == QAttribute::defaultPositionAttributeName()) |
| positionAttribute = attribute; |
| else if (attribute->attributeType() == QAttribute::IndexAttribute) |
| indexAttribute = attribute; |
| } |
| } |
| |
| if (positionAttribute) |
| positionBuffer = manager->lookupResource<Buffer, BufferManager>(positionAttribute->bufferId()); |
| if (indexAttribute) |
| indexBuffer = manager->lookupResource<Buffer, BufferManager>(indexAttribute->bufferId()); |
| |
| if (positionBuffer) { |
| |
| BufferInfo vertexBufferInfo; |
| vertexBufferInfo.data = positionBuffer->data(); |
| vertexBufferInfo.type = positionAttribute->vertexBaseType(); |
| vertexBufferInfo.byteOffset = positionAttribute->byteOffset(); |
| vertexBufferInfo.dataSize = positionAttribute->vertexSize(); |
| vertexBufferInfo.count = positionAttribute->count(); |
| updateStride(vertexBufferInfo, positionAttribute->byteStride()); |
| |
| if (indexBuffer) { // Indexed |
| |
| BufferInfo indexBufferInfo; |
| indexBufferInfo.data = indexBuffer->data(); |
| indexBufferInfo.type = indexAttribute->vertexBaseType(); |
| indexBufferInfo.byteOffset = indexAttribute->byteOffset(); |
| indexBufferInfo.count = indexAttribute->count(); |
| indexBufferInfo.restartEnabled = renderer->primitiveRestartEnabled(); |
| indexBufferInfo.restartIndexValue = renderer->restartIndexValue(); |
| updateStride(indexBufferInfo, indexAttribute->byteStride()); |
| |
| IndexExecutor executor; |
| executor.m_vertexBufferInfo = vertexBufferInfo; |
| executor.m_primitiveType = renderer->primitiveType(); |
| executor.m_visitor = visitor; |
| |
| return processBuffer(indexBufferInfo, executor); |
| |
| } else { // Non Indexed |
| |
| // Check into which type the buffer needs to be casted |
| VertexExecutor executor; |
| executor.m_primitiveType = renderer->primitiveType(); |
| executor.m_visitor = visitor; |
| |
| return processBuffer(vertexBufferInfo, executor); |
| } |
| } |
| } |
| } |
| |
| } // namespace Visitor |
| |
| } // namespace Render |
| |
| } // namespace Qt3DRender |
| |
| QT_END_NAMESPACE |
| |
| #endif // QT3DRENDER_RENDER_VISITORUTILS_P_H |