内容

• 公共函数
• 保护函数
• 宏
• 详细描述

QImageEncoderControl Class

QImageEncoderControl class provides access to the settings of a media service that performs image encoding. 更多...

头：	#include <QImageEncoderControl>
qmake:	QT += multimedia
继承：	QMediaControl

• 所有成员列表，包括继承成员

公共函数

virtual	~QImageEncoderControl ()
virtual QString	imageCodecDescription (const QString & codec ) const = 0
virtual QImageEncoderSettings	imageSettings () const = 0
virtual void	setImageSettings (const QImageEncoderSettings & settings ) = 0
virtual QStringList	supportedImageCodecs () const = 0
virtual QList<QSize>	supportedResolutions (const QImageEncoderSettings & settings , bool * continuous = Q_NULLPTR) const = 0

• 32 公共函数继承自 QObject

保护函数

QImageEncoderControl (QObject * parent = Q_NULLPTR)

• 9 保护函数继承自 QObject

宏

QImageEncoderControl_iid

额外继承成员

• 1 特性继承自 QObject
• 1 公共槽继承自 QObject
• 2 信号继承自 QObject
• 11 静态公共成员继承自 QObject

详细描述

QImageEncoderControl class provides access to the settings of a media service that performs image encoding.

若 QMediaService supports encoding image data it will implement QImageEncoderControl . This control allows to set image encoding settings and provides functions for quering supported image codecs and resolutions .

接口名称对于 QImageEncoderControl is org.qt-project.qt.imageencodercontrol/5.0 作为定义在 QImageEncoderControl_iid .

另请参阅 QImageEncoderSettings and QMediaService::requestControl ().

成员函数文档编制

[protected] QImageEncoderControl:: QImageEncoderControl ( QObject * parent = Q_NULLPTR)

Constructs a new image encoder control object with the given parent

[virtual] QImageEncoderControl:: ~QImageEncoderControl ()

Destroys the image encoder control.

[pure virtual] QString QImageEncoderControl:: imageCodecDescription (const QString & codec ) const

Returns a description of an image codec .

[pure virtual] QImageEncoderSettings QImageEncoderControl:: imageSettings () const

Returns the currently used image encoder settings.

The returned value may be different tha passed to QImageEncoderControl::setImageSettings () if the settings contains the default or undefined parameters. In this case if the undefined parameters are already resolved, they should be returned.

另请参阅 setImageSettings ().

[pure virtual] void QImageEncoderControl:: setImageSettings (const QImageEncoderSettings & settings )

Sets the selected image encoder settings .

另请参阅 imageSettings ().

[pure virtual] QStringList QImageEncoderControl:: supportedImageCodecs () const

Returns a list of supported image codecs.

[pure virtual] QList < QSize > QImageEncoderControl:: supportedResolutions (const QImageEncoderSettings & settings , bool * continuous = Q_NULLPTR) const

Returns a list of supported resolutions.

If non null image settings parameter is passed, the returned list is reduced to resolutions supported with partial settings applied. It can be used to query the list of resolutions, supported by specific image codec.

If the encoder supports arbitrary resolutions within the supported resolutions range, * continuous is set to true, otherwise * continuous 被设为 false。

宏文档编制

QImageEncoderControl_iid

org.qt-project.qt.imageencodercontrol/5.0

定义接口名为 QImageEncoderControl 类。