内容

• 公共函数
• 详细描述

QImageEncoderSettings 类

QImageEncoderSettings class provides a set of image encoder settings. 更多...

头：	#include <QImageEncoderSettings>
qmake:	QT += multimedia

• 所有成员列表，包括继承成员

公共函数

	QImageEncoderSettings ()
	QImageEncoderSettings (const QImageEncoderSettings & other )
	~QImageEncoderSettings ()
QString	codec () const
QVariant	encodingOption (const QString & option ) const
QVariantMap	encodingOptions () const
bool	isNull () const
QMultimedia::EncodingQuality	quality () const
QSize	resolution () const
void	setCodec (const QString & codec )
void	setEncodingOption (const QString & option , const QVariant & value )
void	setEncodingOptions (const QVariantMap & options )
void	setQuality (QMultimedia::EncodingQuality quality )
void	setResolution (const QSize & resolution )
void	setResolution (int width , int height )
bool	operator!= (const QImageEncoderSettings & other ) const
QImageEncoderSettings &	operator= (const QImageEncoderSettings & other )
bool	operator== (const QImageEncoderSettings & other ) const

详细描述

QImageEncoderSettings class provides a set of image encoder settings.

A image encoder settings object is used to specify the image encoder settings used by QCameraImageCapture . Image encoder settings are selected by constructing a QImageEncoderSettings object, setting the desired properties and then passing it to a QCameraImageCapture instance using the QCameraImageCapture::setImageSettings() function.

QImageEncoderSettings imageSettings;
imageSettings.setCodec("image/jpeg");
imageSettings.setResolution(1600, 1200);
imageCapture->setEncodingSettings(imageSettings);
					

另请参阅 QImageEncoderControl .

成员函数文档编制

QImageEncoderSettings:: QImageEncoderSettings ()

Constructs a null image encoder settings object.

QImageEncoderSettings:: QImageEncoderSettings (const QImageEncoderSettings & other )

Constructs a copy of the image encoder settings object other .

QImageEncoderSettings:: ~QImageEncoderSettings ()

Destroys a image encoder settings object.

QString QImageEncoderSettings:: codec () const

返回图像编解码器。

另请参阅 setCodec ().

QVariant QImageEncoderSettings:: encodingOption (const QString & option ) const

Returns the value of encoding option .

另请参阅 setEncodingOption () 和 encodingOptions ().

QVariantMap QImageEncoderSettings:: encodingOptions () const

Returns the all the encoding options as QVariantMap .

另请参阅 encodingOption () 和 setEncodingOptions ().

bool QImageEncoderSettings:: isNull () const

Identifies if a image encoder settings object is uninitalized.

Returns true if the settings are null, and false if they are not.

QMultimedia::EncodingQuality QImageEncoderSettings:: quality () const

Returns the image encoding quality.

另请参阅 setQuality ().

QSize QImageEncoderSettings:: resolution () const

Returns the resolution of the encoded image.

另请参阅 setResolution ().

void QImageEncoderSettings:: setCodec (const QString & codec )

设置图像 codec .

另请参阅 codec ().

void QImageEncoderSettings:: setEncodingOption (const QString & option , const QVariant & value )

Set the encoding option value .

The supported set and meaning of encoding options are system and selected codec specific.

另请参阅 encodingOption () 和 setEncodingOptions ().

void QImageEncoderSettings:: setEncodingOptions (const QVariantMap & options )

Replace all the encoding options with options .

The supported set and meaning of encoding options are system and selected codec specific.

另请参阅 encodingOptions (), encodingOption ()，和 setEncodingOption ().

void QImageEncoderSettings:: setQuality ( QMultimedia::EncodingQuality quality )

Sets the image encoding quality .

另请参阅 quality ().

void QImageEncoderSettings:: setResolution (const QSize & resolution )

设置 resolution of the encoded image.

An empty QSize indicates the encoder should make an optimal choice based on what is available from the image source and the limitations of the codec.

另请参阅 resolution ().

void QImageEncoderSettings:: setResolution ( int width , int height )

设置 width and height of the resolution of the encoded image.

这是重载函数。

bool QImageEncoderSettings:: operator!= (const QImageEncoderSettings & other ) const

Determines if other is of equal value to a image encoder settings object.

Returns true if the settings objects are not of equal value, and false if they are of equal value.

QImageEncoderSettings &QImageEncoderSettings:: operator= (const QImageEncoderSettings & other )

Assigns the value of other to a image encoder settings object.

bool QImageEncoderSettings:: operator== (const QImageEncoderSettings & other ) const

Determines if other is of equal value to a image encoder settings object.

Returns true if the settings objects are of equal value, and false if they are not of equal value.