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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 QSGGEOMETRY_H
#define QSGGEOMETRY_H
#include <QtOpenGL/qgl.h>
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
class QSGGeometry
{
public:
struct Attribute
{
int position;
int tupleSize;
int type;
};
struct AttributeSet {
int count;
int stride;
const Attribute *attributes;
};
struct Point2D { float x, y; };
struct TexturedPoint2D { float x, y; float tx, ty; };
struct ColoredPoint2D { float x, y; unsigned char r, g, b, a; };
static const AttributeSet &defaultAttributes_Point2D();
static const AttributeSet &defaultAttributes_TexturedPoint2D();
static const AttributeSet &defaultAttributes_ColoredPoint2D();
QSGGeometry(const QSGGeometry::AttributeSet &attribs,
int vertexCount,
int indexCount = 0,
int indexType = GL_UNSIGNED_SHORT);
~QSGGeometry();
void setDrawingMode(GLenum mode);
inline GLenum drawingMode() const { return m_drawing_mode; }
void allocate(int vertexCount, int indexCount = 0);
int vertexCount() const { return m_vertex_count; }
void *vertexData() { return m_data; }
inline Point2D *vertexDataAsPoint2D();
inline TexturedPoint2D *vertexDataAsTexturedPoint2D();
inline ColoredPoint2D *vertexDataAsColoredPoint2D();
inline const void *vertexData() const { return m_data; }
inline const Point2D *vertexDataAsPoint2D() const;
inline const TexturedPoint2D *vertexDataAsTexturedPoint2D() const;
inline const ColoredPoint2D *vertexDataAsColoredPoint2D() const;
inline int indexType() const { return m_index_type; }
int indexCount() const { return m_index_count; }
void *indexData();
inline uint *indexDataAsUInt();
inline quint16 *indexDataAsUShort();
const void *indexData() const;
inline const uint *indexDataAsUInt() const;
inline const quint16 *indexDataAsUShort() const;
inline int attributeCount() const { return m_attributes.count; }
inline const Attribute *attributes() const { return m_attributes.attributes; }
inline int stride() const { return m_attributes.stride; }
static void updateRectGeometry(QSGGeometry *g, const QRectF &rect);
static void updateTexturedRectGeometry(QSGGeometry *g, const QRectF &rect, const QRectF &sourceRect);
private:
int m_drawing_mode;
int m_vertex_count;
int m_index_count;
int m_index_type;
const AttributeSet &m_attributes;
void *m_data;
int m_index_data_offset;
void *m_reserved_pointer;
uint m_owns_data : 1;
uint m_reserved_bits : 31;
float m_prealloc[16];
};
inline uint *QSGGeometry::indexDataAsUInt()
{
Q_ASSERT(m_index_type == GL_UNSIGNED_INT);
return (uint *) indexData();
}
inline quint16 *QSGGeometry::indexDataAsUShort()
{
Q_ASSERT(m_index_type == GL_UNSIGNED_SHORT);
return (quint16 *) indexData();
}
inline const uint *QSGGeometry::indexDataAsUInt() const
{
Q_ASSERT(m_index_type == GL_UNSIGNED_INT);
return (uint *) indexData();
}
inline const quint16 *QSGGeometry::indexDataAsUShort() const
{
Q_ASSERT(m_index_type == GL_UNSIGNED_SHORT);
return (quint16 *) indexData();
}
inline QSGGeometry::Point2D *QSGGeometry::vertexDataAsPoint2D()
{
Q_ASSERT(m_attributes.count == 1);
Q_ASSERT(m_attributes.stride == 2 * sizeof(float));
Q_ASSERT(m_attributes.attributes[0].tupleSize == 2);
Q_ASSERT(m_attributes.attributes[0].type == GL_FLOAT);
Q_ASSERT(m_attributes.attributes[0].position == 0);
return (Point2D *) m_data;
}
inline QSGGeometry::TexturedPoint2D *QSGGeometry::vertexDataAsTexturedPoint2D()
{
Q_ASSERT(m_attributes.count == 2);
Q_ASSERT(m_attributes.stride == 4 * sizeof(float));
Q_ASSERT(m_attributes.attributes[0].position == 0);
Q_ASSERT(m_attributes.attributes[0].tupleSize == 2);
Q_ASSERT(m_attributes.attributes[0].type == GL_FLOAT);
Q_ASSERT(m_attributes.attributes[1].position == 1);
Q_ASSERT(m_attributes.attributes[1].tupleSize == 2);
Q_ASSERT(m_attributes.attributes[1].type == GL_FLOAT);
return (TexturedPoint2D *) m_data;
}
inline QSGGeometry::ColoredPoint2D *QSGGeometry::vertexDataAsColoredPoint2D()
{
Q_ASSERT(m_attributes.count == 2);
Q_ASSERT(m_attributes.stride == 2 * sizeof(float) + 4 * sizeof(char));
Q_ASSERT(m_attributes.attributes[0].position == 0);
Q_ASSERT(m_attributes.attributes[0].tupleSize == 2);
Q_ASSERT(m_attributes.attributes[0].type == GL_FLOAT);
Q_ASSERT(m_attributes.attributes[1].position == 1);
Q_ASSERT(m_attributes.attributes[1].tupleSize == 4);
Q_ASSERT(m_attributes.attributes[1].type == GL_UNSIGNED_BYTE);
return (ColoredPoint2D *) m_data;
}
inline const QSGGeometry::Point2D *QSGGeometry::vertexDataAsPoint2D() const
{
Q_ASSERT(m_attributes.count == 1);
Q_ASSERT(m_attributes.stride == 2 * sizeof(float));
Q_ASSERT(m_attributes.attributes[0].tupleSize == 2);
Q_ASSERT(m_attributes.attributes[0].type == GL_FLOAT);
Q_ASSERT(m_attributes.attributes[0].position == 0);
return (const Point2D *) m_data;
}
inline const QSGGeometry::TexturedPoint2D *QSGGeometry::vertexDataAsTexturedPoint2D() const
{
Q_ASSERT(m_attributes.count == 2);
Q_ASSERT(m_attributes.stride == 4 * sizeof(float));
Q_ASSERT(m_attributes.attributes[0].position == 0);
Q_ASSERT(m_attributes.attributes[0].tupleSize == 2);
Q_ASSERT(m_attributes.attributes[0].type == GL_FLOAT);
Q_ASSERT(m_attributes.attributes[1].position == 1);
Q_ASSERT(m_attributes.attributes[1].tupleSize == 2);
Q_ASSERT(m_attributes.attributes[1].type == GL_FLOAT);
return (const TexturedPoint2D *) m_data;
}
inline const QSGGeometry::ColoredPoint2D *QSGGeometry::vertexDataAsColoredPoint2D() const
{
Q_ASSERT(m_attributes.count == 2);
Q_ASSERT(m_attributes.stride == 2 * sizeof(float) + 4 * sizeof(char));
Q_ASSERT(m_attributes.attributes[0].position == 0);
Q_ASSERT(m_attributes.attributes[0].tupleSize == 2);
Q_ASSERT(m_attributes.attributes[0].type == GL_FLOAT);
Q_ASSERT(m_attributes.attributes[1].position == 1);
Q_ASSERT(m_attributes.attributes[1].tupleSize == 4);
Q_ASSERT(m_attributes.attributes[1].type == GL_UNSIGNED_BYTE);
return (const ColoredPoint2D *) m_data;
}
QT_END_NAMESPACE
QT_END_HEADER
#endif // QSGGEOMETRY_H
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