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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the Qt scene graph research project.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** 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, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef GEOMETRY_H
#define GEOMETRY_H
#include <qglattributedescription.h>
#include <qarray.h>
#include <QtCore/qvector.h>
#include <qglfunctions.h>
#include <QGLBuffer>
#include "qmlscene_global.h"
class QGLAttributeValue;
class QT_SCENEGRAPH_EXPORT Geometry
{
public:
Geometry(); // Creates a null geometry.
Geometry(const QVector<QGLAttributeDescription> &description, GLenum indexType = GL_UNSIGNED_SHORT);
~Geometry();
void *vertexData();
const void *constVertexData() const { return m_vertex_data.constData(); }
const QArray<uchar> &vertexArray() const { return m_vertex_data; }
void setVertexDescription(const QVector<QGLAttributeDescription> &description);
const QVector<QGLAttributeDescription> &vertexDescription() const { return m_vertex_description; }
int vertexCount() const { return m_vertex_data.size() / m_vertex_stride; }
void setVertexCount(int count) {
int currSize = m_vertex_data.size();
int newSize = count * m_vertex_stride;
if (newSize > currSize)
m_vertex_data.extend(newSize - currSize); // Do not initialize newly allocated memory
else if (newSize < currSize)
m_vertex_data.resize(newSize);
}
void *indexData();
ushort *ushortIndexData();
uint *uintIndexData();
const void *constIndexData() const { return m_index_data.constData(); }
const ushort *constUshortIndexData() const;
const uint *constUintIndexData() const;
const QArray<uchar> &indexArray() const { return m_index_data; }
void setIndexType(GLenum indexType);
GLenum indexType() const { return m_index_type; }
int indexCount() const { return m_index_data.size() / m_index_stride; }
void setIndexCount(int count) {
int currSize = m_index_data.size();
int newSize = count * m_index_stride;
if (newSize > currSize)
m_index_data.extend(newSize - currSize); // Do not initialize newly allocated memory
else if (newSize < currSize)
m_index_data.resize(newSize);
}
QGL::DrawingMode drawingMode() const { return m_mode; }
void setDrawingMode(QGL::DrawingMode mode) { m_mode = mode; }
int stride() const { return m_vertex_stride; }
QGLAttributeValue attributeValue(QGL::VertexAttribute attribute) const;
bool isNull() const { return m_vertex_description.isEmpty(); }
protected:
QArray<uchar> m_vertex_data;
QArray<uchar> m_index_data;
QVector<QGLAttributeDescription> m_vertex_description; // QGLAttributeDescription should have offset and normalized, must assume tightly packed data for now.
GLenum m_index_type;
QGL::DrawingMode m_mode;
int m_vertex_stride;
int m_index_stride;
};
class GeometryDataUploader
{
public:
static void registerGeometry(const Geometry *);
static void unregisterGeometry(const Geometry *);
static void bind();
static void release();
static void upload();
static const void *vertexData(const Geometry *g, int offset = 0);
static const void *indexData(const Geometry *g);
static void setUseBuffers(bool b) { m_use_buffers = b; }
static bool useBuffers() { return m_use_buffers; }
static void markVertexDirty() { m_vertex_dirty = true; }
static void markIndexDirty() { m_index_dirty = true; }
private:
static void addGeometryVertex(const Geometry *);
static void addGeometryIndex(const Geometry *);
static void clearVertexData() { m_vertex_offsets.clear(); m_vertex_data.clear(); }
static void clearIndexData() { m_index_offsets.clear(); m_index_data.clear(); }
static bool m_use_buffers;
static QSet<const Geometry *> m_geometries;
static QGLBuffer m_vertex_buffer;
static QGLBuffer m_index_buffer;
static QArray<uchar> m_vertex_data;
static QArray<uchar> m_index_data;
static QHash<const Geometry *, int> m_vertex_offsets;
static QHash<const Geometry *, int> m_index_offsets;
static bool m_vertex_bound;
static bool m_index_bound;
static bool m_vertex_dirty;
static bool m_index_dirty;
};
#endif
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