QImageEncoderSettings 类

QImageEncoderSettings 类提供一组图像编码器设置。更多...

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

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公共函数

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

详细描述

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 (const QImageEncoderSettings & other )

构造副本为图像编码器设置对象 other .

QImageEncoderSettings:: QImageEncoderSettings ()

构造 null 图像编码器设置对象。

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

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

QImageEncoderSettings:: ~QImageEncoderSettings ()

销毁图像编码器设置对象。

QString QImageEncoderSettings:: codec () const

返回图像编解码器。

另请参阅 setCodec ().

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

返回值为编码 option .

另请参阅 setEncodingOption () 和 encodingOptions ().

QVariantMap QImageEncoderSettings:: encodingOptions () const

返回所有编码选项按 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

返回图像编码品质。

另请参阅 setQuality ().

QSize QImageEncoderSettings:: resolution () const

返回编码图像的分辨率。

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 )

设置编码 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 )

设置图像编码 quality .

另请参阅 quality ().

void QImageEncoderSettings:: setResolution (const QSize & resolution )

设置 resolution 为编码图像。

空 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.

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.