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// Copyright (C) 2017 Klaralvdalens Datakonsult AB (KDAB).
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QT3DRENDER_RENDER_BUFFERVISITOR_P_H
#define QT3DRENDER_RENDER_BUFFERVISITOR_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 <Qt3DCore/qnodeid.h>
#include <Qt3DCore/qattribute.h>
#include <Qt3DCore/private/buffervisitor_p.h>
#include <Qt3DRender/private/trianglesvisitor_p.h>
#include <Qt3DRender/private/attribute_p.h>
#include <Qt3DRender/private/buffer_p.h>
#include <Qt3DRender/private/bufferutils_p.h>
#include <Qt3DRender/private/geometryrenderer_p.h>
#include <Qt3DRender/private/geometry_p.h>
#include <Qt3DRender/private/managers_p.h>
#include <Qt3DRender/private/nodemanagers_p.h>
QT_BEGIN_NAMESPACE
namespace Qt3DCore {
class QEntity;
}
namespace Qt3DRender {
namespace Render {
template <typename ValueType, Qt3DCore::QAttribute::VertexBaseType VertexBaseType, uint dataSize>
class Q_AUTOTEST_EXPORT BufferVisitor : public Qt3DCore::BufferVisitor<ValueType, VertexBaseType, dataSize>
{
public:
explicit BufferVisitor(NodeManagers *manager)
: m_manager(manager)
{
}
virtual ~BufferVisitor() = default;
bool apply(Qt3DRender::Render::Attribute *attribute,
Qt3DRender::Render::Attribute *indexAttribute,
int drawVertexCount,
bool primitiveRestartEnabled,
int primitiveRestartIndex)
{
if (attribute->vertexBaseType() != VertexBaseType)
return false;
if (attribute->vertexSize() < dataSize)
return false;
auto data = m_manager->lookupResource<Buffer, BufferManager>(attribute->bufferId())->data();
auto vertexBuffer = BufferTypeInfo::castToType<VertexBaseType>(data, attribute->byteOffset());
if (indexAttribute) {
auto indexData = m_manager->lookupResource<Buffer, BufferManager>(indexAttribute->bufferId())->data();
switch (indexAttribute->vertexBaseType()) {
case Qt3DCore::QAttribute::UnsignedShort: {
auto indexBuffer = BufferTypeInfo::castToType<Qt3DCore::QAttribute::UnsignedShort>(indexData, indexAttribute->byteOffset());
this->traverseCoordinateIndexed(vertexBuffer, indexBuffer, attribute->byteStride(), drawVertexCount,
primitiveRestartEnabled, primitiveRestartIndex);
break;
}
case Qt3DCore::QAttribute::UnsignedInt: {
auto indexBuffer = BufferTypeInfo::castToType<Qt3DCore::QAttribute::UnsignedInt>(indexData, indexAttribute->byteOffset());
this->traverseCoordinateIndexed(vertexBuffer, indexBuffer, attribute->byteStride(), drawVertexCount,
primitiveRestartEnabled, primitiveRestartIndex);
break;
}
case Qt3DCore::QAttribute::UnsignedByte: {
auto indexBuffer = BufferTypeInfo::castToType<Qt3DCore::QAttribute::UnsignedByte>(indexData, indexAttribute->byteOffset());
this->traverseCoordinateIndexed(vertexBuffer, indexBuffer, attribute->byteStride(), drawVertexCount,
primitiveRestartEnabled, primitiveRestartIndex);
break;
}
default: Q_UNREACHABLE();
}
} else {
switch (dataSize) {
case 1: this->traverseCoordinates1(vertexBuffer, attribute->byteStride(), drawVertexCount); break;
case 2: this->traverseCoordinates2(vertexBuffer, attribute->byteStride(), drawVertexCount); break;
case 3: this->traverseCoordinates3(vertexBuffer, attribute->byteStride(), drawVertexCount); break;
case 4: this->traverseCoordinates4(vertexBuffer, attribute->byteStride(), drawVertexCount); break;
default: Q_UNREACHABLE();
}
}
return true;
}
protected:
NodeManagers *m_manager;
};
typedef BufferVisitor<float, Qt3DCore::QAttribute::Float, 3> Buffer3fVisitor;
} // namespace Render
} // namespace Qt3DRender
QT_END_NAMESPACE
#endif // QT3DRENDER_RENDER_BUFFERVISITOR_P_H