内容

• 公共函数
• 静态公共成员
• 详细描述

QRgba64 类

QRgba64 struct contains a 64-bit RGB color. 更多...

头：	#include <QRgba64>
qmake:	QT += gui
Since:	Qt 5.6

• 所有成员列表，包括继承成员

公共函数

	QRgba64 () = default
quint8	alpha8 () const
quint16	alpha () const
quint8	blue8 () const
quint16	blue () const
quint8	green8 () const
quint16	green () const
bool	isOpaque () const
bool	isTransparent () const
QRgba64	premultiplied () const
quint8	red8 () const
quint16	red () const
void	setAlpha (quint16 alpha )
void	setBlue (quint16 blue )
void	setGreen (quint16 green )
void	setRed (quint16 red )
uint	toArgb32 () const
ushort	toRgb16 () const
QRgba64	unpremultiplied () const
	operator quint64 () const
QRgba64	operator= (quint64 rgba )

静态公共成员

QRgba64	fromArgb32 (uint rgb )
QRgba64	fromRgba64 (quint64 c )
QRgba64	fromRgba64 (quint16 r , quint16 g , quint16 b , quint16 a )
QRgba64	fromRgba (quint8 red , quint8 green , quint8 blue , quint8 alpha )

详细描述

QRgba64 struct contains a 64-bit RGB color.

QRgba64 is a 64-bit data-structure containing four 16-bit color channels: Red, green, blue and alpha.

QRgba64 can be used a replacement for QRgb when higher precision is needed. In particular a premultiplied QRgba64 can operate on unpremultiplied QRgb without loss of precision except for alpha 0.

另请参阅 QRgb and QColor .

成员函数文档编制

[default] QRgba64:: QRgba64 ()

Default constructs an instance of QRgba64.

quint8 QRgba64:: alpha8 () const

Returns the alpha channel as an 8-bit.

quint16 QRgba64:: alpha () const

Returns the 16-bit alpha channel.

另请参阅 setAlpha ().

quint8 QRgba64:: blue8 () const

Returns the blue color component as an 8-bit.

quint16 QRgba64:: blue () const

Returns the 16-bit blue color component.

另请参阅 setBlue ().

[static] QRgba64 QRgba64:: fromArgb32 ( uint rgb )

构造 QRgba64 value from the 32bit ARGB value rgb .

另请参阅 fromRgba ().

[static] QRgba64 QRgba64:: fromRgba64 ( quint64 c )

返回 c 作为 QRgba64 struct.

另请参阅 fromArgb32 ().

[static] QRgba64 QRgba64:: fromRgba64 ( quint16 r , quint16 g , quint16 b , quint16 a )

返回 QRgba64 quadruplet ( r , g , b , a ).

另请参阅 fromRgba ().

[static] QRgba64 QRgba64:: fromRgba ( quint8 red , quint8 green , quint8 blue , quint8 alpha )

构造 QRgba64 value from the four 8-bit color channels red , green , blue and alpha .

另请参阅 fromArgb32 ().

quint8 QRgba64:: green8 () const

Returns the green color component as an 8-bit.

quint16 QRgba64:: green () const

Returns the 16-bit green color component.

另请参阅 setGreen ().

bool QRgba64:: isOpaque () const

Returns whether the color is fully opaque.

另请参阅 isTransparent () 和 alpha ().

bool QRgba64:: isTransparent () const

Returns whether the color is transparent.

另请参阅 isOpaque () 和 alpha ().

QRgba64 QRgba64:: premultiplied () const

Returns the color with the alpha premultiplied.

另请参阅 unpremultiplied ().

quint8 QRgba64:: red8 () const

Returns the red color component as an 8-bit.

quint16 QRgba64:: red () const

Returns the 16-bit red color component.

另请参阅 setRed ().

void QRgba64:: setAlpha ( quint16 alpha )

Sets the alpha of this color to alpha .

另请参阅 alpha ().

void QRgba64:: setBlue ( quint16 blue )

Sets the blue color component of this color to blue .

另请参阅 blue ().

void QRgba64:: setGreen ( quint16 green )

Sets the green color component of this color to green .

另请参阅 green ().

void QRgba64:: setRed ( quint16 red )

Sets the red color component of this color to red .

另请参阅 red ().

uint QRgba64:: toArgb32 () const

Returns the color as a 32-bit ARGB value.

另请参阅 fromArgb32 ().

ushort QRgba64:: toRgb16 () const

Returns the color as a 16-bit RGB value.

另请参阅 toArgb32 ().

QRgba64 QRgba64:: unpremultiplied () const

Returns the color with the alpha unpremultiplied.

另请参阅 premultiplied ().

QRgba64:: operator quint64 () const

Returns the color as a 64bit unsigned integer

QRgba64 QRgba64:: operator= ( quint64 rgba )

Assigns the value rgba to this instance of QRgba64 and returns it.