QImageEncoderControl Class
The QImageEncoderControl class provides access to the settings of a media service that performs image encoding. 更多...
| 头文件: | #include <QImageEncoderControl> |
| qmake: | QT += multimedia |
| 基类: | QMediaControl |
公有函数
| 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 个公有函数继承自 QObject
受保护的函数
| QImageEncoderControl(QObject *parent = Q_NULLPTR) |
- 9 个受保护的函数继承自 QObject
Macros
其他继承的成员
- 1 个属性继承自 QObject
- 1 个公有槽函数继承自 QObject
- 2 个信号继承自 QObject
- 1 个公有变量继承自 QObject
- 10 个静态公有成员继承自 QObject
- 2 个受保护的变量继承自 QObject
详细描述
The QImageEncoderControl class provides access to the settings of a media service that performs image encoding.
If a 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.
The interface name of QImageEncoderControl is org.qt-project.qt.imageencodercontrol/5.0 as defined in QImageEncoderControl_iid.
参见 QImageEncoderSettings and QMediaService::requestControl().
成员函数
[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.
参见 setImageSettings().
[pure virtual] void QImageEncoderControl::setImageSettings(const QImageEncoderSettings &settings)
Sets the selected image encoder settings.
参见 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 is set to false.
宏
QImageEncoderControl_iid
org.qt-project.qt.imageencodercontrol/5.0
Defines the interface name of the QImageEncoderControl class.