QSGGeometry Class Reference

#include <qsggeometry.h>

Classes
struct	Attribute
struct	AttributeSet
struct	ColoredPoint2D
struct	Point2D
struct	TexturedPoint2D

Public Functions
void	allocate (int vertexCount, int indexCount=0)
int	attributeCount () const
const Attribute *	attributes () const
GLenum	drawingMode () const
int	indexCount () const
void *	indexData ()
const void *	indexData () const
uint *	indexDataAsUInt ()
const uint *	indexDataAsUInt () const
quint16 *	indexDataAsUShort ()
const quint16 *	indexDataAsUShort () const
int	indexType () const
	QSGGeometry (const QSGGeometry::AttributeSet &attribs, int vertexCount, int indexCount=0, int indexType=GL_UNSIGNED_SHORT)
void	setDrawingMode (GLenum mode)
int	stride () const
int	vertexCount () const
void *	vertexData ()
const void *	vertexData () const
ColoredPoint2D *	vertexDataAsColoredPoint2D ()
const ColoredPoint2D *	vertexDataAsColoredPoint2D () const
Point2D *	vertexDataAsPoint2D ()
const Point2D *	vertexDataAsPoint2D () const
TexturedPoint2D *	vertexDataAsTexturedPoint2D ()
const TexturedPoint2D *	vertexDataAsTexturedPoint2D () const
	~QSGGeometry ()

Static Public Functions
static const AttributeSet &	defaultAttributes_ColoredPoint2D ()
static const AttributeSet &	defaultAttributes_Point2D ()
static const AttributeSet &	defaultAttributes_TexturedPoint2D ()
static void	updateRectGeometry (QSGGeometry *g, const QRectF &rect)
static void	updateTexturedRectGeometry (QSGGeometry *g, const QRectF &rect, const QRectF &sourceRect)

Properties
const AttributeSet &	m_attributes
void *	m_data
int	m_drawing_mode
int	m_index_count
int	m_index_data_offset
int	m_index_type
uint	m_owns_data: 1
float	m_prealloc [16]
uint	m_reserved_bits: 31
void *	m_reserved_pointer
int	m_vertex_count

Detailed Description

Definition at line 51 of file qsggeometry.h.

Constructors and Destructors

QSGGeometry()

QSGGeometry::QSGGeometry	(	const QSGGeometry::AttributeSet &	attribs,
		int	vertexCount,
		int	indexCount = 0,
		int	indexType = GL_UNSIGNED_SHORT
	)

Definition at line 80 of file qsggeometry.cpp.

    : m_drawing_mode(GL_TRIANGLE_STRIP)
    , m_vertex_count(0)
    , m_index_count(0)
    , m_index_type(indexType)
    , m_attributes(attributes)
    , m_data(0)
    , m_index_data_offset(-1)
    , m_owns_data(false)
{
    Q_ASSERT(m_attributes.count > 0);
    Q_ASSERT(m_attributes.stride > 0);

    // Because allocate reads m_vertex_count, m_index_count and m_owns_data, these
    // need to be set before calling allocate...
    allocate(vertexCount, indexCount);
}

~QSGGeometry()

QSGGeometry::~QSGGeometry

(

)

Definition at line 101 of file qsggeometry.cpp.

{
    if (m_owns_data)
        qFree(m_data);
}

Functions

allocate()

void QSGGeometry::allocate	(	int	vertexCount,
		int	indexCount = 0
	)

Definition at line 126 of file qsggeometry.cpp.

Referenced by drawingMode(), QSGGeometry(), and ShaderEffectItem::updateGeometry().

{
    if (vertexCount == m_vertex_count && indexCount == m_index_count)
        return;

    m_vertex_count = vertexCount;
    m_index_count = indexCount;

    bool canUsePrealloc = m_index_count <= 0;
    int vertexByteSize = m_attributes.stride * m_vertex_count;

    if (m_owns_data)
        qFree(m_data);

    if (canUsePrealloc && vertexByteSize <= (int) sizeof(m_prealloc)) {
        m_data = (void *) &m_prealloc[0];
        m_index_data_offset = -1;
        m_owns_data = false;
    } else {
        Q_ASSERT(m_index_type == GL_UNSIGNED_INT || m_index_type == GL_UNSIGNED_SHORT);
        int indexByteSize = indexCount * (m_index_type == GL_UNSIGNED_SHORT ? sizeof(quint16) : sizeof(quint32));
        m_data = (void *) qMalloc(vertexByteSize + indexByteSize);
        m_index_data_offset = vertexByteSize;
        m_owns_data = true;
    }

}

attributeCount()

int QSGGeometry::attributeCount ( ) const

inline

Definition at line 110 of file qsggeometry.h.

Referenced by ShaderEffectItem::bindGeometry().

{ return m_attributes.count; }

attributes()

const Attribute* QSGGeometry::attributes ( ) const

inline

Definition at line 111 of file qsggeometry.h.

Referenced by ShaderEffectItem::bindGeometry(), ShaderEffectItem::renderEffect(), and ShaderEffectItem::updateShaderProgram().

{ return m_attributes.attributes; }

defaultAttributes_ColoredPoint2D()

const QSGGeometry::AttributeSet & QSGGeometry::defaultAttributes_ColoredPoint2D ( )

static

Definition at line 68 of file qsggeometry.cpp.

{
    static Attribute data[] = {
        { 0, 2, GL_FLOAT },
        { 1, 4, GL_UNSIGNED_BYTE }
    };
    static AttributeSet attrs = { 2, 2 * sizeof(float) + 4 * sizeof(char), data };
    return attrs;
}

defaultAttributes_Point2D()

const QSGGeometry::AttributeSet & QSGGeometry::defaultAttributes_Point2D ( )

static

Definition at line 47 of file qsggeometry.cpp.

{
    static Attribute data[] = {
        { 0, 2, GL_FLOAT }
    };
    static AttributeSet attrs = { 1, sizeof(float) * 2, data };
    return attrs;
}

defaultAttributes_TexturedPoint2D()

const QSGGeometry::AttributeSet & QSGGeometry::defaultAttributes_TexturedPoint2D ( )

static

Definition at line 57 of file qsggeometry.cpp.

{
    static Attribute data[] = {
        { 0, 2, GL_FLOAT },
        { 1, 2, GL_FLOAT }
    };
    static AttributeSet attrs = { 2, sizeof(float) * 4, data };
    return attrs;
}

drawingMode()

GLenum QSGGeometry::drawingMode ( ) const

inline

Definition at line 82 of file qsggeometry.h.

Referenced by ShaderEffectItem::renderEffect().

{ return m_drawing_mode; }

indexCount()

int QSGGeometry::indexCount ( ) const

inline

Definition at line 100 of file qsggeometry.h.

Referenced by allocate(), drawingMode(), and ShaderEffectItem::renderEffect().

{ return m_index_count; }

indexData() [1/2]

void * QSGGeometry::indexData

(

)

Definition at line 107 of file qsggeometry.cpp.

Referenced by indexCount(), indexDataAsUInt(), indexDataAsUShort(), and ShaderEffectItem::renderEffect().

{
    return m_index_data_offset < 0
            ? 0
            : ((char *) m_data + m_index_data_offset);
}

indexData() [2/2]

const void * QSGGeometry::indexData

(

)

const

Definition at line 114 of file qsggeometry.cpp.

{
    return m_index_data_offset < 0
            ? 0
            : ((char *) m_data + m_index_data_offset);
}

indexDataAsUInt() [1/2]

uint * QSGGeometry::indexDataAsUInt ( )

inline

Definition at line 134 of file qsggeometry.h.

Referenced by indexCount().

{
    Q_ASSERT(m_index_type == GL_UNSIGNED_INT);
    return (uint *) indexData();
}

indexDataAsUInt() [2/2]

const uint * QSGGeometry::indexDataAsUInt ( ) const

inline

Definition at line 146 of file qsggeometry.h.

{
    Q_ASSERT(m_index_type == GL_UNSIGNED_INT);
    return (uint *) indexData();
}

indexDataAsUShort() [1/2]

quint16 * QSGGeometry::indexDataAsUShort ( )

inline

Definition at line 140 of file qsggeometry.h.

Referenced by indexCount(), and ShaderEffectItem::updateGeometry().

{
    Q_ASSERT(m_index_type == GL_UNSIGNED_SHORT);
    return (quint16 *) indexData();
}

indexDataAsUShort() [2/2]

const quint16 * QSGGeometry::indexDataAsUShort ( ) const

inline

Definition at line 152 of file qsggeometry.h.

{
    Q_ASSERT(m_index_type == GL_UNSIGNED_SHORT);
    return (quint16 *) indexData();
}

indexType()

int QSGGeometry::indexType ( ) const

inline

Definition at line 98 of file qsggeometry.h.

Referenced by ShaderEffectItem::renderEffect().

{ return m_index_type; }

setDrawingMode()

void QSGGeometry::setDrawingMode

(

GLenum

mode

)

Definition at line 121 of file qsggeometry.cpp.

{
    m_drawing_mode = mode;
}

stride()

int QSGGeometry::stride ( ) const

inline

Definition at line 112 of file qsggeometry.h.

Referenced by ShaderEffectItem::bindGeometry().

{ return m_attributes.stride; }

updateRectGeometry()

void QSGGeometry::updateRectGeometry ( QSGGeometry *  g, const QRectF &  rect  )

static

Definition at line 154 of file qsggeometry.cpp.

Referenced by stride().

{
    Point2D *v = g->vertexDataAsPoint2D();
    v[0].x = rect.left();
    v[0].y = rect.top();

    v[1].x = rect.right();
    v[1].y = rect.top();

    v[2].x = rect.left();
    v[2].y = rect.bottom();

    v[3].x = rect.right();
    v[3].y = rect.bottom();
}

updateTexturedRectGeometry()

void QSGGeometry::updateTexturedRectGeometry ( QSGGeometry *  g, const QRectF &  rect, const QRectF &  sourceRect  )

static

Definition at line 170 of file qsggeometry.cpp.

Referenced by stride(), and ShaderEffectItem::updateGeometry().

{
    TexturedPoint2D *v = g->vertexDataAsTexturedPoint2D();
    v[0].x = rect.left();
    v[0].y = rect.top();
    v[0].tx = textureRect.left();
    v[0].ty = textureRect.top();

    v[1].x = rect.right();
    v[1].y = rect.top();
    v[1].tx = textureRect.right();
    v[1].ty = textureRect.top();

    v[2].x = rect.left();
    v[2].y = rect.bottom();
    v[2].tx = textureRect.left();
    v[2].ty = textureRect.bottom();

    v[3].x = rect.right();
    v[3].y = rect.bottom();
    v[3].tx = textureRect.right();
    v[3].ty = textureRect.bottom();
}

vertexCount()

int QSGGeometry::vertexCount ( ) const

inline

Definition at line 86 of file qsggeometry.h.

Referenced by allocate(), ShaderEffectItem::renderEffect(), and ShaderEffectItem::updateGeometry().

{ return m_vertex_count; }

vertexData() [1/2]

void* QSGGeometry::vertexData ( )

inline

Definition at line 88 of file qsggeometry.h.

Referenced by ShaderEffectItem::bindGeometry().

{ return m_data; }

vertexData() [2/2]

const void* QSGGeometry::vertexData ( ) const

inline

Definition at line 93 of file qsggeometry.h.

{ return m_data; }

vertexDataAsColoredPoint2D() [1/2]

QSGGeometry::ColoredPoint2D * QSGGeometry::vertexDataAsColoredPoint2D ( )

inline

Definition at line 181 of file qsggeometry.h.

Referenced by vertexData().

{
    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;
}

vertexDataAsColoredPoint2D() [2/2]

const QSGGeometry::ColoredPoint2D * QSGGeometry::vertexDataAsColoredPoint2D ( ) const

inline

Definition at line 217 of file qsggeometry.h.

{
    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;
}

vertexDataAsPoint2D() [1/2]

QSGGeometry::Point2D * QSGGeometry::vertexDataAsPoint2D ( )

inline

Definition at line 158 of file qsggeometry.h.

Referenced by updateRectGeometry(), and vertexData().

{
    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;
}

vertexDataAsPoint2D() [2/2]

const QSGGeometry::Point2D * QSGGeometry::vertexDataAsPoint2D ( ) const

inline

Definition at line 194 of file qsggeometry.h.

{
    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;
}

vertexDataAsTexturedPoint2D() [1/2]

QSGGeometry::TexturedPoint2D * QSGGeometry::vertexDataAsTexturedPoint2D ( )

inline

Definition at line 168 of file qsggeometry.h.

Referenced by ShaderEffectItem::updateGeometry(), updateTexturedRectGeometry(), and vertexData().

{
    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;
}

vertexDataAsTexturedPoint2D() [2/2]

const QSGGeometry::TexturedPoint2D * QSGGeometry::vertexDataAsTexturedPoint2D ( ) const

inline

Definition at line 204 of file qsggeometry.h.

{
    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;
}

Properties

m_attributes

const AttributeSet& QSGGeometry::m_attributes

private

Definition at line 122 of file qsggeometry.h.

Referenced by allocate(), attributeCount(), attributes(), QSGGeometry(), stride(), vertexDataAsColoredPoint2D(), vertexDataAsPoint2D(), and vertexDataAsTexturedPoint2D().

m_data

void* QSGGeometry::m_data

private

Definition at line 123 of file qsggeometry.h.

Referenced by allocate(), indexData(), vertexData(), vertexDataAsColoredPoint2D(), vertexDataAsPoint2D(), vertexDataAsTexturedPoint2D(), and ~QSGGeometry().

m_drawing_mode

int QSGGeometry::m_drawing_mode

private

Definition at line 118 of file qsggeometry.h.

Referenced by drawingMode(), and setDrawingMode().

m_index_count

int QSGGeometry::m_index_count

private

Definition at line 120 of file qsggeometry.h.

Referenced by allocate(), and indexCount().

m_index_data_offset

int QSGGeometry::m_index_data_offset

private

Definition at line 124 of file qsggeometry.h.

Referenced by allocate(), and indexData().

m_index_type

int QSGGeometry::m_index_type

private

Definition at line 121 of file qsggeometry.h.

Referenced by allocate(), indexDataAsUInt(), indexDataAsUShort(), and indexType().

m_owns_data

uint QSGGeometry::m_owns_data

private

Definition at line 128 of file qsggeometry.h.

Referenced by allocate(), and ~QSGGeometry().

m_prealloc

float QSGGeometry::m_prealloc[16]

private

Definition at line 131 of file qsggeometry.h.

Referenced by allocate().

m_reserved_bits

uint QSGGeometry::m_reserved_bits

private

Definition at line 129 of file qsggeometry.h.

m_reserved_pointer

void* QSGGeometry::m_reserved_pointer

private

Definition at line 126 of file qsggeometry.h.

m_vertex_count

int QSGGeometry::m_vertex_count

private

Definition at line 119 of file qsggeometry.h.

Referenced by allocate(), and vertexCount().

---

The documentation for this class was generated from the following files:

• /src/imports/shaders/scenegraph/qsggeometry.h
• /src/imports/shaders/scenegraph/qsggeometry.cpp