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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