Pixel information. More...

#include <colors>

Collaboration diagram for L4Re::Video::Pixel_info:

Public Member Functions
Color_component const &	r () const
	Return the red color compoment of the pixel.

Color_component const &	g () const
	Return the green color compoment of the pixel.

Color_component const &	b () const
	Return the blue color compoment of the pixel.

Color_component const &	a () const
	Return the alpha color compoment of the pixel.

Color_component const	padding () const
	Compute the padding pseudo component.

unsigned char	bytes_per_pixel () const
	Query size of pixel in bytes.

unsigned char	bits_per_pixel () const
	Number of bits of the pixel.

bool	has_alpha () const
	Return whether the pixel has an alpha channel.

void	r (Color_component const &c)
	Set the red color component of the pixel.

void	g (Color_component const &c)
	Set the green color component of the pixel.

void	b (Color_component const &c)
	Set the blue color component of the pixel.

void	a (Color_component const &c)
	Set the alpha color component of the pixel.

void	bytes_per_pixel (unsigned char bpp)
	Set the size of the pixel in bytes.

	Pixel_info ()
	Constructor.

	Pixel_info (unsigned char bpp, char r, char rs, char g, char gs, char b, char bs, char a=0, char as=0)
	Constructor.

template<typename VBI >
	Pixel_info (VBI const *vbi)
	Convenience constructor.

bool	operator== (Pixel_info const &o) const
	Compare for complete equality of the color space.

template<typename OUT >
void	dump (OUT &s) const
	Dump information on the pixel to a stream.

Detailed Description

Pixel information.

This class wraps the information on a pixel, such as the size and position of each color component in the pixel.

Definition at line 105 of file colors.

Constructor & Destructor Documentation

◆ Pixel_info() [1/2]

L4Re::Video::Pixel_info::Pixel_info	(	unsigned char	bpp,
		char	r,
		char	rs,
		char	g,
		char	gs,
		char	b,
		char	bs,
		char	a = `0`,
		char	as = `0`
	)

inline

Constructor.

Parameters

bpp	Size of pixel in bytes.
r	Red component size.
rs	Red component shift.
g	Green component size.
gs	Green component shift.
b	Blue component size.
bs	Blue component shift.
a	Alpha component size, defaults to 0.
as	Alpha component shift, defaults to 0.

Definition at line 223 of file colors.

◆ Pixel_info() [2/2]

template<typename VBI >

L4Re::Video::Pixel_info::Pixel_info ( VBI const * vbi )

inlineexplicit

Convenience constructor.

Parameters

vbi	Suitable information structure. Convenience constructor to create the pixel info from a VESA Framebuffer Info.

Definition at line 235 of file colors.

Member Function Documentation

◆ a() [1/2]

Color_component const & L4Re::Video::Pixel_info::a ( ) const

inline

Return the alpha color compoment of the pixel.

Returns: Alpha color component.

Definition at line 134 of file colors.

◆ a() [2/2]

void L4Re::Video::Pixel_info::a ( Color_component const & c )

inline

Set the alpha color component of the pixel.

Parameters

c	Alpha color component.

Definition at line 198 of file colors.

◆ b() [1/2]

Color_component const & L4Re::Video::Pixel_info::b ( ) const

inline

Return the blue color compoment of the pixel.

Returns: Blue color component.

Definition at line 128 of file colors.

◆ b() [2/2]

void L4Re::Video::Pixel_info::b ( Color_component const & c )

inline

Set the blue color component of the pixel.

Parameters

c	Blue color component.

Definition at line 192 of file colors.

◆ bits_per_pixel()

unsigned char L4Re::Video::Pixel_info::bits_per_pixel ( ) const

inline

Number of bits of the pixel.

Returns: Number of bits used by the pixel.

Definition at line 167 of file colors.

References L4Re::Video::Color_component::size().

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◆ bytes_per_pixel() [1/2]

unsigned char L4Re::Video::Pixel_info::bytes_per_pixel ( ) const

inline

Query size of pixel in bytes.

Returns: Size of pixel in bytes.

Definition at line 161 of file colors.

◆ bytes_per_pixel() [2/2]

void L4Re::Video::Pixel_info::bytes_per_pixel ( unsigned char bpp )

inline

Set the size of the pixel in bytes.

Parameters

bpp	Size of pixel in bytes.

Definition at line 204 of file colors.

◆ dump()

template<typename OUT >

void L4Re::Video::Pixel_info::dump ( OUT & s ) const

inline

Dump information on the pixel to a stream.

Parameters

s Stream

Definition at line 257 of file colors.

Referenced by L4Re::Video::View::Info::dump().

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◆ g() [1/2]

Color_component const & L4Re::Video::Pixel_info::g ( ) const

inline

Return the green color compoment of the pixel.

Returns: Green color component.

Definition at line 122 of file colors.

◆ g() [2/2]

void L4Re::Video::Pixel_info::g ( Color_component const & c )

inline

Set the green color component of the pixel.

Parameters

c	Green color component.

Definition at line 186 of file colors.

◆ has_alpha()

bool L4Re::Video::Pixel_info::has_alpha ( ) const

inline

Return whether the pixel has an alpha channel.

Returns: True if the pixel has an alpha channel, false if not.

Definition at line 174 of file colors.

References L4Re::Video::Color_component::size().

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◆ operator==()

bool L4Re::Video::Pixel_info::operator== ( Pixel_info const & o ) const

inline

Compare for complete equality of the color space.

Parameters

o	A Pixel_info to compare to.

Returns: true if the both Pixel_info's are equal, false if not.

Definition at line 247 of file colors.

◆ padding()

Color_component const L4Re::Video::Pixel_info::padding ( ) const

inline

Compute the padding pseudo component.

The padding pseudo component represents the tailing bits that are reserved in RGB32 and similar pixel formats.

Returns: Padding pseudo component.

Definition at line 142 of file colors.

References L4Re::Video::Color_component::shift(), and L4Re::Video::Color_component::size().

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◆ r() [1/2]

Color_component const & L4Re::Video::Pixel_info::r ( ) const

inline

Return the red color compoment of the pixel.

Returns: Red color component.

Definition at line 116 of file colors.

◆ r() [2/2]

void L4Re::Video::Pixel_info::r ( Color_component const & c )

inline

Set the red color component of the pixel.

Parameters

c	Red color component.

Definition at line 180 of file colors.

The documentation for this class was generated from the following file:

l4/re/video/colors

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

◆ Pixel_info() [1/2]

◆ Pixel_info() [2/2]

Member Function Documentation

◆ a() [1/2]

◆ a() [2/2]

◆ b() [1/2]

◆ b() [2/2]

◆ bits_per_pixel()

◆ bytes_per_pixel() [1/2]

◆ bytes_per_pixel() [2/2]

◆ dump()

◆ g() [1/2]

◆ g() [2/2]

◆ has_alpha()

◆ operator==()

◆ padding()

◆ r() [1/2]

◆ r() [2/2]