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**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt scene graph research project.
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** $QT_BEGIN_LICENSE:LGPL$
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#ifndef QSGGEOMETRY_H
#define QSGGEOMETRY_H
#include <QtQuick/qtquickglobal.h>
#include <QtGui/qopengl.h>
#include <QtCore/QRectF>
QT_BEGIN_NAMESPACE
class QSGGeometryData;
class Q_QUICK_EXPORT QSGGeometry
{
public:
struct Q_QUICK_EXPORT Attribute
{
int position;
int tupleSize;
int type;
uint isVertexCoordinate : 1;
uint reserved : 31;
static Attribute create(int pos, int tupleSize, int primitiveType, bool isPosition = false);
};
struct AttributeSet {
int count;
int stride;
const Attribute *attributes;
};
struct Point2D {
float x, y;
void set(float nx, float ny) {
x = nx; y = ny;
}
};
struct TexturedPoint2D {
float x, y;
float tx, ty;
void set(float nx, float ny, float ntx, float nty) {
x = nx; y = ny; tx = ntx; ty = nty;
}
};
struct ColoredPoint2D {
float x, y;
unsigned char r, g, b, a;
void set(float nx, float ny, uchar nr, uchar ng, uchar nb, uchar na) {
x = nx; y = ny;
r = nr; g = ng, b = nb; a = na;
}
};
static const AttributeSet &defaultAttributes_Point2D();
static const AttributeSet &defaultAttributes_TexturedPoint2D();
static const AttributeSet &defaultAttributes_ColoredPoint2D();
enum DataPattern {
AlwaysUploadPattern = 0,
StreamPattern = 1,
DynamicPattern = 2,
StaticPattern = 3
};
QSGGeometry(const QSGGeometry::AttributeSet &attribs,
int vertexCount,
int indexCount = 0,
int indexType = GL_UNSIGNED_SHORT);
virtual ~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();
inline int sizeOfIndex() const;
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 sizeOfVertex() const { return m_attributes.stride; }
static void updateRectGeometry(QSGGeometry *g, const QRectF &rect);
static void updateTexturedRectGeometry(QSGGeometry *g, const QRectF &rect, const QRectF &sourceRect);
void setIndexDataPattern(DataPattern p);
DataPattern indexDataPattern() const { return DataPattern(m_index_usage_pattern); }
void setVertexDataPattern(DataPattern p);
DataPattern vertexDataPattern() const { return DataPattern(m_vertex_usage_pattern); }
void markIndexDataDirty();
void markVertexDataDirty();
float lineWidth() const;
void setLineWidth(float w);
private:
friend class QSGGeometryData;
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;
QSGGeometryData *m_server_data;
uint m_owns_data : 1;
uint m_index_usage_pattern : 2;
uint m_vertex_usage_pattern : 2;
uint m_dirty_index_data : 1;
uint m_dirty_vertex_data : 1;
uint m_reserved_bits : 25;
float m_prealloc[16];
float m_line_width;
};
inline uint *QSGGeometry::indexDataAsUInt()
{
Q_ASSERT(m_index_type == GL_UNSIGNED_INT);
return static_cast<uint *>(indexData());
}
inline quint16 *QSGGeometry::indexDataAsUShort()
{
Q_ASSERT(m_index_type == GL_UNSIGNED_SHORT);
return static_cast<quint16 *>(indexData());
}
inline const uint *QSGGeometry::indexDataAsUInt() const
{
Q_ASSERT(m_index_type == GL_UNSIGNED_INT);
return static_cast<const uint *>(indexData());
}
inline const quint16 *QSGGeometry::indexDataAsUShort() const
{
Q_ASSERT(m_index_type == GL_UNSIGNED_SHORT);
return static_cast<const 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 static_cast<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 static_cast<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 static_cast<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 static_cast<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 static_cast<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 static_cast<const ColoredPoint2D *>(m_data);
}
int QSGGeometry::sizeOfIndex() const
{
if (m_index_type == GL_UNSIGNED_SHORT) return 2;
else if (m_index_type == GL_UNSIGNED_BYTE) return 1;
else if (m_index_type == GL_UNSIGNED_INT) return 4;
return 0;
}
QT_END_NAMESPACE
#endif // QSGGEOMETRY_H
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