Inheritance diagram for QGLPixmapConvolutionFilter:

Public Functions
	QGLPixmapConvolutionFilter ()

void	setUniforms (QGLShaderProgram *program)

	~QGLPixmapConvolutionFilter ()

Public Functions inherited from QGLCustomShaderStage
	QGLCustomShaderStage ()

void	removeFromPainter (QPainter *)

void	setInactive ()

bool	setOnPainter (QPainter *)

void	setUniformsDirty ()

QByteArray	source () const

virtual	~QGLCustomShaderStage ()

Public Functions inherited from QGLPixmapFilter< QPixmapConvolutionFilter >
void	draw (QPainter *painter, const QPointF &pos, const QPixmap &src, const QRectF &srcRect=QRectF()) const

Public Functions inherited from QPixmapConvolutionFilter
QRectF	boundingRectFor (const QRectF &rect) const

	QPixmapConvolutionFilter (QObject *parent=0)
	Constructs a pixmap convolution filter. More...

void	setConvolutionKernel (const qreal *matrix, int rows, int columns)
	Sets convolution kernel with the given number of rows and columns. More...

	~QPixmapConvolutionFilter ()
	Destructor of pixmap convolution filter. More...

Public Functions inherited from QPixmapFilter
FilterType	type () const
	Returns the type of the filter. More...

virtual	~QPixmapFilter ()=0
	Destroys the pixmap filter. More...

Public Functions inherited from QObject
bool	blockSignals (bool b)
	If block is true, signals emitted by this object are blocked (i.e., emitting a signal will not invoke anything connected to it). More...

const QObjectList &	children () const
	Returns a list of child objects. More...

bool	connect (const QObject sender, const char signal, const char *member, Qt::ConnectionType type=Qt::AutoConnection) const

bool	disconnect (const char signal=0, const QObject receiver=0, const char *member=0)

bool	disconnect (const QObject receiver, const char member=0)

void	dumpObjectInfo ()
	Dumps information about signal connections, etc. More...

void	dumpObjectTree ()
	Dumps a tree of children to the debug output. More...

QList< QByteArray >	dynamicPropertyNames () const
	Returns the names of all properties that were dynamically added to the object using setProperty(). More...

virtual bool	event (QEvent *)
	This virtual function receives events to an object and should return true if the event e was recognized and processed. More...

virtual bool	eventFilter (QObject , QEvent )
	Filters events if this object has been installed as an event filter for the watched object. More...

template<typename T >
T	findChild (const QString &aName=QString()) const
	Returns the child of this object that can be cast into type T and that is called name, or 0 if there is no such object. More...

template<typename T >
QList< T >	findChildren (const QString &aName=QString()) const
	Returns all children of this object with the given name that can be cast to type T, or an empty list if there are no such objects. More...

template<typename T >
QList< T >	findChildren (const QRegExp &re) const

bool	inherits (const char *classname) const
	Returns true if this object is an instance of a class that inherits className or a QObject subclass that inherits className; otherwise returns false. More...

void	installEventFilter (QObject *)
	Installs an event filter filterObj on this object. More...

bool	isWidgetType () const
	Returns true if the object is a widget; otherwise returns false. More...

void	killTimer (int id)
	Kills the timer with timer identifier, id. More...

virtual const QMetaObject *	metaObject () const
	Returns a pointer to the meta-object of this object. More...

void	moveToThread (QThread *thread)
	Changes the thread affinity for this object and its children. More...

QString	objectName () const

QObject *	parent () const
	Returns a pointer to the parent object. More...

QVariant	property (const char *name) const
	Returns the value of the object's name property. More...

Q_INVOKABLE	QObject (QObject *parent=0)
	Constructs an object with parent object parent. More...

void	removeEventFilter (QObject *)
	Removes an event filter object obj from this object. More...

void	setObjectName (const QString &name)

void	setParent (QObject *)
	Makes the object a child of parent. More...

bool	setProperty (const char *name, const QVariant &value)
	Sets the value of the object's name property to value. More...

void	setUserData (uint id, QObjectUserData *data)

bool	signalsBlocked () const
	Returns true if signals are blocked; otherwise returns false. More...

int	startTimer (int interval)
	Starts a timer and returns a timer identifier, or returns zero if it could not start a timer. More...

QThread *	thread () const
	Returns the thread in which the object lives. More...

QObjectUserData *	userData (uint id) const

virtual	~QObject ()
	Destroys the object, deleting all its child objects. More...

Public Functions inherited from QGLPixmapFilterBase
virtual	~QGLPixmapFilterBase ()

Protected Functions
bool	processGL (QPainter *painter, const QPointF &pos, const QPixmap &src, const QRectF &srcRect) const

Protected Functions inherited from QGLCustomShaderStage
void	setSource (const QByteArray &)

Protected Functions inherited from QPixmapFilter
	QPixmapFilter (QPixmapFilterPrivate &d, FilterType type, QObject *parent)

	QPixmapFilter (FilterType type, QObject *parent)
	Constructs a default QPixmapFilter with the given type. More...

Protected Functions inherited from QObject
virtual void	childEvent (QChildEvent *)
	This event handler can be reimplemented in a subclass to receive child events. More...

virtual void	connectNotify (const char *signal)
	This virtual function is called when something has been connected to signal in this object. More...

virtual void	customEvent (QEvent *)
	This event handler can be reimplemented in a subclass to receive custom events. More...

virtual void	disconnectNotify (const char *signal)
	This virtual function is called when something has been disconnected from signal in this object. More...

	QObject (QObjectPrivate &dd, QObject *parent=0)

int	receivers (const char *signal) const
	Returns the number of receivers connected to the signal. More...

QObject *	sender () const
	Returns a pointer to the object that sent the signal, if called in a slot activated by a signal; otherwise it returns 0. More...

int	senderSignalIndex () const

virtual void	timerEvent (QTimerEvent *)
	This event handler can be reimplemented in a subclass to receive timer events for the object. More...

Protected Functions inherited from QGLPixmapFilterBase
void	bindTexture (const QPixmap &src) const

void	drawImpl (QPainter *painter, const QPointF &pos, const QPixmap &src, const QRectF &srcRect=QRectF()) const

Private Functions
QByteArray	generateConvolutionShader () const

Properties
int	m_prevKernelSize

QSize	m_srcSize

Additional Inherited Members
Public Types inherited from QPixmapFilter
enum	FilterType { ConvolutionFilter, ColorizeFilter, DropShadowFilter, BlurFilter, UserFilter = 1024 }
	This enum describes the types of filter that can be applied to pixmaps. More...

Public Slots inherited from QObject
void	deleteLater ()
	Schedules this object for deletion. More...

Signals inherited from QObject
void	destroyed (QObject *=0)
	This signal is emitted immediately before the object obj is destroyed, and can not be blocked. More...

Static Public Functions inherited from QObject
static bool	connect (const QObject sender, const char signal, const QObject receiver, const char member, Qt::ConnectionType=Qt::AutoConnection)
	Creates a connection of the given type from the signal in the sender object to the method in the receiver object. More...

static bool	connect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &method, Qt::ConnectionType type=Qt::AutoConnection)

static bool	disconnect (const QObject sender, const char signal, const QObject receiver, const char member)
	Disconnects signal in object sender from method in object receiver. More...

static bool	disconnect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &member)

static uint	registerUserData ()

static QString	tr (const char sourceText, const char comment=0, int n=-1)

static QString	trUtf8 (const char sourceText, const char comment=0, int n=-1)

Static Public Variables inherited from QObject
static const QMetaObject	staticMetaObject
	This variable stores the meta-object for the class. More...

Protected Variables inherited from QObject
QScopedPointer< QObjectData >	d_ptr

Static Protected Variables inherited from QObject
static const QMetaObject	staticQtMetaObject

Related Functions inherited from QObject
T	qFindChildqFindChildren (const QObject *obj, const QString &name)()

QList< T >	qFindChildrenqFindChildren (const QObject *obj, const QString &name)()

QList< T >	qFindChildrenqFindChildren (const QObject *obj, const QRegExp &regExp)()

T *	qobject_cast (QObject *object)

	QObjectList

void *	qt_find_obj_child (QObject parent, const char type, const QString &name)
	Returns a pointer to the object named name that inherits type and with a given parent. More...

Detailed Description

Definition at line 90 of file qglpixmapfilter.cpp.

Constructors and Destructors

◆ QGLPixmapConvolutionFilter()

QGLPixmapConvolutionFilter::QGLPixmapConvolutionFilter ( )

Definition at line 248 of file qglpixmapfilter.cpp.

     : m_prevKernelSize(-1)
 {
 }

◆ ~QGLPixmapConvolutionFilter()

QGLPixmapConvolutionFilter::~QGLPixmapConvolutionFilter ( )

Definition at line 253 of file qglpixmapfilter.cpp.

254 {

255 }

Functions

◆ generateConvolutionShader()

QByteArray QGLPixmapConvolutionFilter::generateConvolutionShader ( ) const

private

Definition at line 222 of file qglpixmapfilter.cpp.

Referenced by processGL().

                                                                        {
     QByteArray code;
     int kernelWidth = columns();
     int kernelHeight = rows();
     int kernelSize = kernelWidth * kernelHeight;
     code.append("uniform highp vec2 inv_texture_size;\n"
                 "uniform mediump float matrix[");
     code.append(QByteArray::number(kernelSize));
     code.append("];\n"
                 "uniform highp vec2 offset[");
     code.append(QByteArray::number(kernelSize));
     code.append("];\n");
     code.append("lowp vec4 customShader(lowp sampler2D src, highp vec2 srcCoords) {\n");
 
     code.append("  int i = 0;\n"
                 "  lowp vec4 sum = vec4(0.0);\n"
                 "  for (i = 0; i < ");
     code.append(QByteArray::number(kernelSize));
     code.append("; i++) {\n"
                 "    sum += matrix[i] * texture2D(src,srcCoords+inv_texture_size*offset[i]);\n"
                 "  }\n"
                 "  return sum;\n"
                 "}");
     return code;
 }

◆ processGL()

bool QGLPixmapConvolutionFilter::processGL	(	QPainter *	painter,
		const QPointF &	pos,
		const QPixmap &	src,
		const QRectF &	srcRect
	)		const

protectedvirtual

Implements QGLPixmapFilterBase.

Definition at line 257 of file qglpixmapfilter.cpp.

 {
     QGLPixmapConvolutionFilter *filter = const_cast<QGLPixmapConvolutionFilter *>(this);
 
     m_srcSize = src.size();
 
     int kernelSize = rows() * columns();
     if (m_prevKernelSize == -1 || m_prevKernelSize != kernelSize) {
         filter->setSource(generateConvolutionShader());
         m_prevKernelSize = kernelSize;
     }
 
     filter->setOnPainter(painter);
     painter->drawPixmap(pos, src, srcRect);
     filter->removeFromPainter(painter);
 
     return true;
 }

◆ setUniforms()

void QGLPixmapConvolutionFilter::setUniforms ( QGLShaderProgram * program )

virtual

Reimplemented from QGLCustomShaderStage.

Definition at line 194 of file qglpixmapfilter.cpp.

 {
     const qreal *kernel = convolutionKernel();
     int kernelWidth = columns();
     int kernelHeight = rows();
     int kernelSize = kernelWidth * kernelHeight;
 
     QVarLengthArray<GLfloat> matrix(kernelSize);
     QVarLengthArray<GLfloat> offset(kernelSize * 2);
 
     for(int i = 0; i < kernelSize; ++i)
         matrix[i] = kernel[i];
 
     for(int y = 0; y < kernelHeight; ++y) {
         for(int x = 0; x < kernelWidth; ++x) {
             offset[(y * kernelWidth + x) * 2] = x - (kernelWidth / 2);
             offset[(y * kernelWidth + x) * 2 + 1] = (kernelHeight / 2) - y;
         }
     }
 
     const qreal iw = 1.0 / m_srcSize.width();
     const qreal ih = 1.0 / m_srcSize.height();
     program->setUniformValue("inv_texture_size", iw, ih);
     program->setUniformValueArray("matrix", matrix.constData(), kernelSize, 1);
     program->setUniformValueArray("offset", offset.constData(), kernelSize, 2);
 }

Properties

◆ m_prevKernelSize

int QGLPixmapConvolutionFilter::m_prevKernelSize

mutableprivate

Definition at line 105 of file qglpixmapfilter.cpp.

Referenced by processGL().

◆ m_srcSize

QSize QGLPixmapConvolutionFilter::m_srcSize

mutableprivate

Definition at line 104 of file qglpixmapfilter.cpp.

Referenced by processGL().

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

/src/opengl/qglpixmapfilter.cpp

Public Functions

Protected Functions

Private Functions

Properties

Additional Inherited Members

Detailed Description

Constructors and Destructors

◆ QGLPixmapConvolutionFilter()

◆ ~QGLPixmapConvolutionFilter()

Functions

◆ generateConvolutionShader()

◆ processGL()

◆ setUniforms()

Properties

◆ m_prevKernelSize

◆ m_srcSize