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Diffstat (limited to 'src/core/render/io/meshdata.h')
| -rw-r--r-- | src/core/render/io/meshdata.h | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/src/core/render/io/meshdata.h b/src/core/render/io/meshdata.h new file mode 100644 index 000000000..92a9330bb --- /dev/null +++ b/src/core/render/io/meshdata.h @@ -0,0 +1,181 @@ +/**************************************************************************** +** +** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB). +** Contact: http://www.qt-project.org/legal +** +** 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 Digia. For licensing terms and +** conditions see http://qt.digia.com/licensing. For further information +** use the contact form at http://qt.digia.com/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 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Digia gives you certain additional +** rights. These rights are described in the Digia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef MESHDATA_H +#define MESHDATA_H + +#include <QSharedPointer> +#include <QList> +#include <QMap> +#include <QOpenGLBuffer> +#include <QVector2D> + +#include <axisalignedboundingbox.h> + + +namespace Qt3D +{ + +GLint elementType(GLint type); +GLint tupleSizeFromType(GLint type); +GLuint byteSizeFromType(GLint type); + +class Buffer +{ +public: + Buffer(QOpenGLBuffer::Type ty); + + void setUsage(QOpenGLBuffer::UsagePattern usage); + + void setData(QByteArray bytes); + QByteArray data() const; + + QOpenGLBuffer::Type type() const + { return m_type; } + + void bind(); + + QOpenGLBuffer createGL() const; + void upload(QOpenGLBuffer b); + + // make a QObject and signal when contents change? + // GraphicsContext could listen, orphan the QOpenGLBuffer and hence + // reupload next time it's need +private: + const QOpenGLBuffer::Type m_type; + QOpenGLBuffer::UsagePattern m_usage; + QByteArray m_clientSideBytes; +}; + +typedef QSharedPointer<Buffer> BufferPtr; + +class Attribute +{ +public: + Attribute(BufferPtr buf, int type, int count, int offset=0, int stride = 0); + + void setDivisor(unsigned int divisor); + + unsigned int divisor() const + { return m_divisor; } + + BufferPtr buffer() const; + + int type() const + { return m_type; } + + unsigned int count() const + { return m_count; } + + unsigned int byteStride() const + { return m_stride; } + + unsigned int byteOffset() const + { return m_offset; } + + QVector<QVector3D> asVector3D() const; + QVector<QVector2D> asVector2D() const; + + void dump(int count); +private: + BufferPtr m_buffer; + int m_type, m_count; + unsigned int m_stride, m_offset; // both in bytes + // AxisAlignedBoundBox m_range; + unsigned int m_divisor; +}; + +typedef QSharedPointer<Attribute> AttributePtr; + +/** + * @brief The MeshData class is shared by all instances of a RenderMesh, + * and holds the actual client (CPU)-side buffers representing mesh attributes + * and indices. + */ +class MeshData +{ +public: + MeshData(); + explicit MeshData(int primitiveType); + + void addAttribute(QString name, AttributePtr attr); + + // permit inline 'new' call, will take ownership + void addAttribute(QString name, Attribute* attr); + + void setIndexAttr(AttributePtr indexAttr); + void setIndexData(BufferPtr buf, int type, int count, int offset = 0); + + GLint primitiveType() const; + GLsizei primitiveCount() const; + + QStringList attributeNames() const; + + AttributePtr attributeByName(QString nm) const; + + AttributePtr indexAttr() const; + + QString materialName() const; + + QList<BufferPtr> buffers() const; + + // specify the bounding box explicitly + void setBoundingBox(const AxisAlignedBoundingBox& bbox); + + void computeBoundsFromAttribute(QString name); + + AxisAlignedBoundingBox boundingBox() const + { return m_box; } +private: + QMap<QString, AttributePtr> m_attributes; + QString m_materialName; + + int m_primitiveType; + AttributePtr m_indexAttr; + + AxisAlignedBoundingBox m_box; +}; + +typedef QSharedPointer<MeshData> MeshDataPtr; + +} + +#endif // MESHDATA_H |