QColorSpace 类

QColorSpace 类提供色彩空间的抽象。更多...

头：	#include <QColorSpace>
CMake:	find_package(Qt6 REQUIRED COMPONENTS Gui) target_link_libraries(mytarget PRIVATE Qt6::Gui)
qmake:	QT += gui

所有成员列表，包括继承成员
QColorSpace is part of 描绘类 .

公共类型

enum	NamedColorSpace { SRgb, SRgbLinear, AdobeRgb, DisplayP3, ProPhotoRgb }
enum class	Primaries { Custom, SRgb, AdobeRgb, DciP3D65, ProPhotoRgb }
enum class	TransferFunction { Custom, Linear, Gamma, SRgb, ProPhotoRgb }

公共函数

	QColorSpace ()
	QColorSpace (QColorSpace::NamedColorSpace namedColorSpace )
	QColorSpace (QColorSpace::Primaries primaries , QColorSpace::TransferFunction transferFunction , float gamma = 0.0f)
	QColorSpace (QColorSpace::Primaries primaries , float gamma )
	QColorSpace (QColorSpace::Primaries gamut , const QList<uint16_t> & transferFunctionTable )
	QColorSpace (const QPointF & whitePoint , const QPointF & redPoint , const QPointF & greenPoint , const QPointF & bluePoint , QColorSpace::TransferFunction transferFunction , float gamma = 0.0f)
	QColorSpace (const QPointF & whitePoint , const QPointF & redPoint , const QPointF & greenPoint , const QPointF & bluePoint , const QList<uint16_t> & transferFunctionTable )
	QColorSpace (const QPointF & whitePoint , const QPointF & redPoint , const QPointF & greenPoint , const QPointF & bluePoint , const QList<uint16_t> & redTransferFunctionTable , const QList<uint16_t> & greenTransferFunctionTable , const QList<uint16_t> & blueTransferFunctionTable )
QString	description () const
float	gamma () const
QByteArray	iccProfile () const
bool	isValid () const
QColorSpace::Primaries	primaries () const
void	setDescription (const QString & description )
void	setPrimaries (QColorSpace::Primaries primariesId )
void	setPrimaries (const QPointF & whitePoint , const QPointF & redPoint , const QPointF & greenPoint , const QPointF & bluePoint )
void	setTransferFunction (QColorSpace::TransferFunction transferFunction , float gamma = 0.0f)
void	setTransferFunction (const QList<uint16_t> & transferFunctionTable )
void	setTransferFunctions (const QList<uint16_t> & redTransferFunctionTable , const QList<uint16_t> & greenTransferFunctionTable , const QList<uint16_t> & blueTransferFunctionTable )
void	swap (QColorSpace & other )
QColorSpace::TransferFunction	transferFunction () const
QColorTransform	transformationToColorSpace (const QColorSpace & colorspace ) const
QColorSpace	withTransferFunction (QColorSpace::TransferFunction transferFunction , float gamma = 0.0f) const
QColorSpace	withTransferFunction (const QList<uint16_t> & transferFunctionTable ) const
QColorSpace	withTransferFunctions (const QList<uint16_t> & redTransferFunctionTable , const QList<uint16_t> & greenTransferFunctionTable , const QList<uint16_t> & blueTransferFunctionTable ) const
QVariant	operator QVariant () const

静态公共成员

QColorSpace

fromIccProfile (const QByteArray & iccProfile )

bool	operator!= (const QColorSpace & colorSpace1 , const QColorSpace & colorSpace2 )
QDataStream &	operator<< (QDataStream & stream , const QColorSpace & colorSpace )
bool	operator== (const QColorSpace & colorSpace1 , const QColorSpace & colorSpace2 )
QDataStream &	operator>> (QDataStream & stream , QColorSpace & colorSpace )

详细描述

Color values can be interpreted in different ways, and based on the interpretation can live in different spaces. We call this color spaces .

QColorSpace provides access to creating several predefined color spaces and can generate QColorTransforms for converting colors from one color space to another.

QColorSpace can also represent color spaces defined by ICC profiles or embedded in images, that do not otherwise fit the predefined color spaces.

A color space can generally speaking be conceived as a combination of set of primary colors and a transfer function. The primaries defines the axes of the color space, and the transfer function how values are mapped on the axes. The primaries are defined by three primary colors that represent exactly how red, green, and blue look in this particular color space, and a white color that represents where and how bright pure white is. The range of colors expressible by the primary colors is called the gamut, and a color space that can represent a wider range of colors is also known as a wide-gamut color space.

The transfer function or gamma curve determines how each component in the color space is encoded. These are used because human perception does not operate linearly, and the transfer functions try to ensure that colors will seem evenly spaced to human eyes.

成员类型文档编制

enum QColorSpace:: NamedColorSpace

Predefined color spaces.

常量	值	描述
`QColorSpace::SRgb`	`1`	The sRGB color space, which Qt operates in by default. It is a close approximation of how most classic monitors operate, and a mode most software and hardware support. ICC registration of sRGB .
`QColorSpace::SRgbLinear`	`2`	The sRGB color space with linear gamma. Useful for gamma-corrected blending.
`QColorSpace::AdobeRgb`	`3`	The Adobe RGB color space is a classic wide-gamut color space, using a gamma of 2.2. ICC registration of Adobe RGB (1998)
`QColorSpace::DisplayP3`	`4`	A color-space using the primaries of DCI-P3, but with the whitepoint and transfer function of sRGB. Common in modern wide-gamut screens. ICC registration of DCI-P3
`QColorSpace::ProPhotoRgb`	`5`	The Pro Photo RGB color space, also known as ROMM RGB is a very wide gamut color space. ICC registration of ROMM RGB

enum class QColorSpace:: Primaries

预定义的首要颜色集。

常量	值	描述
`QColorSpace::Primaries::Custom`	`0`	The primaries are undefined or does not match any predefined sets.
`QColorSpace::Primaries::SRgb`	`1`	The sRGB primaries
`QColorSpace::Primaries::AdobeRgb`	`2`	The Adobe RGB primaries
`QColorSpace::Primaries::DciP3D65`	`3`	The DCI-P3 primaries with the D65 whitepoint
`QColorSpace::Primaries::ProPhotoRgb`	`4`	The ProPhoto RGB primaries with the D50 whitepoint

enum class QColorSpace:: TransferFunction

Predefined transfer functions or gamma curves.

常量	值	描述
`QColorSpace::TransferFunction::Custom`	`0`	The custom or null transfer function
`QColorSpace::TransferFunction::Linear`	`1`	The linear transfer functions
`QColorSpace::TransferFunction::Gamma`	`2`	A transfer function that is a real gamma curve based on the value of gamma ()
`QColorSpace::TransferFunction::SRgb`	`3`	The sRGB transfer function, composed of linear and gamma parts
`QColorSpace::TransferFunction::ProPhotoRgb`	`4`	The ProPhoto RGB transfer function, composed of linear and gamma parts

成员函数文档编制

QColorSpace:: QColorSpace ()

Creates a new colorspace object that represents an undefined and invalid colorspace.

QColorSpace:: QColorSpace ( QColorSpace::NamedColorSpace namedColorSpace )

Creates a new colorspace object that represents a namedColorSpace .

QColorSpace:: QColorSpace ( QColorSpace::Primaries primaries , QColorSpace::TransferFunction transferFunction , float gamma = 0.0f)

Creates a custom color space with the primaries primaries , using the transfer function transferFunction and optionally gamma .

QColorSpace:: QColorSpace ( QColorSpace::Primaries primaries , float gamma )

Creates a custom color space with the primaries primaries , using a gamma transfer function of gamma .

`[since 6.1]` QColorSpace:: QColorSpace ( QColorSpace::Primaries gamut , const QList < uint16_t > & transferFunctionTable )

Creates a custom color space with the primaries gamut , using a custom transfer function described by transferFunctionTable .

The table should contain at least 2 values, and contain an monotonically increasing list of values from 0 to 65535.

该函数在 Qt 6.1 引入。

QColorSpace:: QColorSpace (const QPointF & whitePoint , const QPointF & redPoint , const QPointF & greenPoint , const QPointF & bluePoint , QColorSpace::TransferFunction transferFunction , float gamma = 0.0f)

Creates a custom colorspace with a primaries based on the chromaticities of the primary colors whitePoint , redPoint , greenPoint and bluePoint , and using the transfer function transferFunction and optionally gamma .

`[since 6.1]` QColorSpace:: QColorSpace (const QPointF & whitePoint , const QPointF & redPoint , const QPointF & greenPoint , const QPointF & bluePoint , const QList < uint16_t > & transferFunctionTable )

Creates a custom color space with primaries based on the chromaticities of the primary colors whitePoint , redPoint , greenPoint and bluePoint , and using the custom transfer function described by transferFunctionTable .

该函数在 Qt 6.1 引入。

`[since 6.1]` QColorSpace:: QColorSpace (const QPointF & whitePoint , const QPointF & redPoint , const QPointF & greenPoint , const QPointF & bluePoint , const QList < uint16_t > & redTransferFunctionTable , const QList < uint16_t > & greenTransferFunctionTable , const QList < uint16_t > & blueTransferFunctionTable )

该函数在 Qt 6.1 引入。

`[since 6.2]` QString QColorSpace:: description () const

Returns the name or short description. If a description hasn't been given in setDescription (), the original name of the profile is returned if the profile is unmodified, a guessed name is returned if the profile has been recognized as a known color space, otherwise an empty string is returned.

该函数在 Qt 6.2 引入。

另请参阅 setDescription ().

`[static]` QColorSpace QColorSpace:: fromIccProfile (const QByteArray & iccProfile )

创建 QColorSpace from ICC profile iccProfile .

注意： Not all ICC profiles are supported. QColorSpace only supports RGB-XYZ ICC profiles that are three-component matrix-based.

If the ICC profile is not supported an invalid QColorSpace is returned where you can still read the original ICC profile using iccProfile ().

另请参阅 iccProfile ().

float QColorSpace:: gamma () const

Returns the gamma value of color spaces with TransferFunction::Gamma , an approximate gamma value for other predefined color spaces, or 0.0 if no approximate gamma is known.

另请参阅 transferFunction ().

QByteArray QColorSpace:: iccProfile () const

Returns an ICC profile representing the color space.

If the color space was generated from an ICC profile, that profile is returned, otherwise one is generated.

注意： Even invalid color spaces may return the ICC profile if they were generated from one, to allow applications to implement wider support themselves.

另请参阅 fromIccProfile ().

bool QColorSpace:: isValid () const

返回 true if the color space is valid.

QColorSpace::Primaries QColorSpace:: primaries () const

Returns the predefined primaries of the color space or primaries::Custom if it doesn't match any of them.

另请参阅 setPrimaries ().

`[since 6.2]` void QColorSpace:: setDescription (const QString & description )

Sets the name or short description of the color space to description .

If set to empty description () will return original or guessed descriptions instead.

该函数在 Qt 6.2 引入。

另请参阅 description ().

void QColorSpace:: setPrimaries ( QColorSpace::Primaries primariesId )

Sets the primaries to those of the primariesId set.

另请参阅 primaries ().

void QColorSpace:: setPrimaries (const QPointF & whitePoint , const QPointF & redPoint , const QPointF & greenPoint , const QPointF & bluePoint )

Set primaries to the chromaticities of whitePoint , redPoint , greenPoint and bluePoint .

另请参阅 primaries ().

void QColorSpace:: setTransferFunction ( QColorSpace::TransferFunction transferFunction , float gamma = 0.0f)

Sets the transfer function to transferFunction and gamma .

另请参阅 transferFunction (), gamma ()，和 withTransferFunction ().

`[since 6.1]` void QColorSpace:: setTransferFunction (const QList < uint16_t > & transferFunctionTable )

Sets the transfer function to transferFunctionTable .

该函数在 Qt 6.1 引入。

另请参阅 withTransferFunction ().

`[since 6.1]` void QColorSpace:: setTransferFunctions (const QList < uint16_t > & redTransferFunctionTable , const QList < uint16_t > & greenTransferFunctionTable , const QList < uint16_t > & blueTransferFunctionTable )

Sets the transfer functions to redTransferFunctionTable , greenTransferFunctionTable and blueTransferFunctionTable .

该函数在 Qt 6.1 引入。

另请参阅 withTransferFunctions ().

void QColorSpace:: swap ( QColorSpace & other )

Swaps color space other with this color space. This operation is very fast and never fails.

QColorSpace::TransferFunction QColorSpace:: transferFunction () const

Returns the predefined transfer function of the color space or TransferFunction::Custom if it doesn't match any of them.

另请参阅 gamma (), setTransferFunction ()，和 withTransferFunction ().

QColorTransform QColorSpace:: transformationToColorSpace (const QColorSpace & colorspace ) const

Generates and returns a color space transformation from this color space to colorspace .

QColorSpace QColorSpace:: withTransferFunction ( QColorSpace::TransferFunction transferFunction , float gamma = 0.0f) const

Returns a copy of this color space, except using the transfer function transferFunction and gamma .

另请参阅 transferFunction (), gamma ()，和 setTransferFunction ().

`[since 6.1]` QColorSpace QColorSpace:: withTransferFunction (const QList < uint16_t > & transferFunctionTable ) const

Returns a copy of this color space, except using the transfer function described by transferFunctionTable .

该函数在 Qt 6.1 引入。

另请参阅 transferFunction () 和 setTransferFunction ().

`[since 6.1]` QColorSpace QColorSpace:: withTransferFunctions (const QList < uint16_t > & redTransferFunctionTable , const QList < uint16_t > & greenTransferFunctionTable , const QList < uint16_t > & blueTransferFunctionTable ) const

Returns a copy of this color space, except using the transfer functions described by redTransferFunctionTable , greenTransferFunctionTable and blueTransferFunctionTable .

该函数在 Qt 6.1 引入。

另请参阅 setTransferFunctions ().

QVariant QColorSpace:: operator QVariant () const

Returns the color space as a QVariant .

QColorSpace 类

公共类型

公共函数

静态公共成员

相关非成员

详细描述

成员类型文档编制

enum QColorSpace:: NamedColorSpace

enum class QColorSpace:: Primaries

enum class QColorSpace:: TransferFunction

成员函数文档编制

QColorSpace:: QColorSpace ()

QColorSpace:: QColorSpace ( QColorSpace::NamedColorSpace namedColorSpace )

QColorSpace:: QColorSpace ( QColorSpace::Primaries primaries , QColorSpace::TransferFunction transferFunction , float gamma = 0.0f)

QColorSpace:: QColorSpace ( QColorSpace::Primaries primaries , float gamma )

[since 6.1] QColorSpace:: QColorSpace ( QColorSpace::Primaries gamut , const QList < uint16_t > & transferFunctionTable )

QColorSpace:: QColorSpace (const QPointF & whitePoint , const QPointF & redPoint , const QPointF & greenPoint , const QPointF & bluePoint , QColorSpace::TransferFunction transferFunction , float gamma = 0.0f)

[since 6.1] QColorSpace:: QColorSpace (const QPointF & whitePoint , const QPointF & redPoint , const QPointF & greenPoint , const QPointF & bluePoint , const QList < uint16_t > & transferFunctionTable )

[since 6.2] QString QColorSpace:: description () const

[static] QColorSpace QColorSpace:: fromIccProfile (const QByteArray & iccProfile )

float QColorSpace:: gamma () const

QByteArray QColorSpace:: iccProfile () const

bool QColorSpace:: isValid () const

QColorSpace::Primaries QColorSpace:: primaries () const

[since 6.2] void QColorSpace:: setDescription (const QString & description )

void QColorSpace:: setPrimaries ( QColorSpace::Primaries primariesId )

void QColorSpace:: setPrimaries (const QPointF & whitePoint , const QPointF & redPoint , const QPointF & greenPoint , const QPointF & bluePoint )

void QColorSpace:: setTransferFunction ( QColorSpace::TransferFunction transferFunction , float gamma = 0.0f)

[since 6.1] void QColorSpace:: setTransferFunction (const QList < uint16_t > & transferFunctionTable )

[since 6.1] void QColorSpace:: setTransferFunctions (const QList < uint16_t > & redTransferFunctionTable , const QList < uint16_t > & greenTransferFunctionTable , const QList < uint16_t > & blueTransferFunctionTable )

void QColorSpace:: swap ( QColorSpace & other )

QColorSpace::TransferFunction QColorSpace:: transferFunction () const

QColorTransform QColorSpace:: transformationToColorSpace (const QColorSpace & colorspace ) const

QColorSpace QColorSpace:: withTransferFunction ( QColorSpace::TransferFunction transferFunction , float gamma = 0.0f) const

[since 6.1] QColorSpace QColorSpace:: withTransferFunction (const QList < uint16_t > & transferFunctionTable ) const

[since 6.1] QColorSpace QColorSpace:: withTransferFunctions (const QList < uint16_t > & redTransferFunctionTable , const QList < uint16_t > & greenTransferFunctionTable , const QList < uint16_t > & blueTransferFunctionTable ) const

QVariant QColorSpace:: operator QVariant () const

相关非成员

bool operator!= (const QColorSpace & colorSpace1 , const QColorSpace & colorSpace2 )

QDataStream & operator<< ( QDataStream & stream , const QColorSpace & colorSpace )

bool operator== (const QColorSpace & colorSpace1 , const QColorSpace & colorSpace2 )

QDataStream & operator>> ( QDataStream & stream , QColorSpace & colorSpace )

内容

`[since 6.1]` QColorSpace:: QColorSpace ( QColorSpace::Primaries gamut , const QList < uint16_t > & transferFunctionTable )

`[since 6.1]` QColorSpace:: QColorSpace (const QPointF & whitePoint , const QPointF & redPoint , const QPointF & greenPoint , const QPointF & bluePoint , const QList < uint16_t > & transferFunctionTable )

`[since 6.2]` QString QColorSpace:: description () const

`[static]` QColorSpace QColorSpace:: fromIccProfile (const QByteArray & iccProfile )

`[since 6.2]` void QColorSpace:: setDescription (const QString & description )

`[since 6.1]` void QColorSpace:: setTransferFunction (const QList < uint16_t > & transferFunctionTable )

`[since 6.1]` void QColorSpace:: setTransferFunctions (const QList < uint16_t > & redTransferFunctionTable , const QList < uint16_t > & greenTransferFunctionTable , const QList < uint16_t > & blueTransferFunctionTable )

`[since 6.1]` QColorSpace QColorSpace:: withTransferFunction (const QList < uint16_t > & transferFunctionTable ) const

`[since 6.1]` QColorSpace QColorSpace:: withTransferFunctions (const QList < uint16_t > & redTransferFunctionTable , const QList < uint16_t > & greenTransferFunctionTable , const QList < uint16_t > & blueTransferFunctionTable ) const