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Diffstat (limited to 'src/render/backend/buffervisitor_p.h')
-rw-r--r-- | src/render/backend/buffervisitor_p.h | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/src/render/backend/buffervisitor_p.h b/src/render/backend/buffervisitor_p.h new file mode 100644 index 000000000..7149e21ae --- /dev/null +++ b/src/render/backend/buffervisitor_p.h @@ -0,0 +1,212 @@ +/**************************************************************************** +** +** Copyright (C) 2017 Klaralvdalens Datakonsult AB (KDAB). +** 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 +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** 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 +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** 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 +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#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 <Qt3DRender/QAttribute> +#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, QAttribute::VertexBaseType VertexBaseType, uint dataSize> +class Q_AUTOTEST_EXPORT BufferVisitor +{ +public: + explicit BufferVisitor(NodeManagers *manager) + : m_manager(manager) + { + } + virtual ~BufferVisitor() { } + + virtual void visit(uint ndx, ValueType x) { + Q_UNUSED(ndx); Q_UNUSED(x); + } + virtual void visit(uint ndx, ValueType x, ValueType y) { + Q_UNUSED(ndx); Q_UNUSED(x); Q_UNUSED(y); + } + virtual void visit(uint ndx, ValueType x, ValueType y, ValueType z) { + Q_UNUSED(ndx); Q_UNUSED(x); Q_UNUSED(y); Q_UNUSED(z); + } + virtual void visit(uint ndx, ValueType x, ValueType y, ValueType z, ValueType w) { + Q_UNUSED(ndx); Q_UNUSED(x); Q_UNUSED(y); Q_UNUSED(z); Q_UNUSED(w); + } + + bool apply(const GeometryRenderer *renderer, const QString &attributeName) + { + if (renderer == nullptr || renderer->instanceCount() != 1) { + return false; + } + + Geometry *geom = m_manager->lookupResource<Geometry, GeometryManager>(renderer->geometryId()); + + if (!geom) + return false; + + Attribute *attribute = nullptr; + + const auto attrIds = geom->attributes(); + for (const Qt3DCore::QNodeId attrId : attrIds) { + attribute = m_manager->lookupResource<Attribute, AttributeManager>(attrId); + if (attribute){ + if (attribute->name() == attributeName + || (attributeName == QStringLiteral("default") + && attribute->name() == QAttribute::defaultTextureCoordinateAttributeName())) { + break; + } + } + attribute = nullptr; + } + + if (!attribute) + return false; + + return apply(attribute); + } + + bool apply(Qt3DRender::Render::Attribute *attribute) + { + if (attribute->vertexBaseType() != VertexBaseType) + return false; + if (attribute->vertexSize() < dataSize) + return false; + + auto data = m_manager->lookupResource<Buffer, BufferManager>(attribute->bufferId())->data(); + auto buffer = BufferTypeInfo::castToType<VertexBaseType>(data, attribute->byteOffset()); + switch (dataSize) { + case 1: traverseCoordinates1(buffer, attribute->byteStride(), attribute->count()); break; + case 2: traverseCoordinates2(buffer, attribute->byteStride(), attribute->count()); break; + case 3: traverseCoordinates3(buffer, attribute->byteStride(), attribute->count()); break; + case 4: traverseCoordinates4(buffer, attribute->byteStride(), attribute->count()); break; + default: Q_UNREACHABLE(); + } + + return true; + } + +protected: + + template <typename Coordinate> + void traverseCoordinates1(Coordinate *coordinates, + const uint byteStride, + const uint count) + { + const uint stride = byteStride / sizeof(Coordinate); + for (uint ndx = 0; ndx < count; ++ndx) { + visit(ndx, coordinates[0]); + coordinates += stride; + } + } + + template <typename Coordinate> + void traverseCoordinates2(Coordinate *coordinates, + const uint byteStride, + const uint count) + { + const uint stride = byteStride / sizeof(Coordinate); + for (uint ndx = 0; ndx < count; ++ndx) { + visit(ndx, coordinates[0], coordinates[1]); + coordinates += stride; + } + } + + template <typename Coordinate> + void traverseCoordinates3(Coordinate *coordinates, + const uint byteStride, + const uint count) + { + const uint stride = byteStride / sizeof(Coordinate); + for (uint ndx = 0; ndx < count; ++ndx) { + visit(ndx, coordinates[0], coordinates[1], coordinates[2]); + coordinates += stride; + } + } + + template <typename Coordinate> + void traverseCoordinates4(Coordinate *coordinates, + const uint byteStride, + const uint count) + { + const uint stride = byteStride / sizeof(Coordinate); + for (uint ndx = 0; ndx < count; ++ndx) { + visit(ndx, coordinates[0], coordinates[1], coordinates[2], coordinates[3]); + coordinates += stride; + } + } + + NodeManagers *m_manager; +}; + +typedef BufferVisitor<float, QAttribute::Float, 3> Buffer3fVisitor; + +} // namespace Render + +} // namespace Qt3DRender + +QT_END_NAMESPACE + + +#endif // QT3DRENDER_RENDER_BUFFERVISITOR_P_H |