Color manipulation

Functions
	G2DformatHexaColor (s)
	Add missed colors in hexa format.
	G2DformatHexaColorI (c)
	format color to hexadecimal value
	G2Drgba2bgra (c)
	Convert an rgba or bgra color to rgba or bgra color.
	G2DgetAlphaFromColor (c)
	get the alpha from a alpha color
	G2DsetColorAlpha (c, a)
	set the alpha of a color
	G2Dbgra2bgr (c)
	Convert an bgra or bgr color.
	G2Drgba2rgb (c)
	Convert an rgba or rgb color.
	G2Dbgr2bgra (c, a)
	Convert an bgr to bgra color.
	G2Drgb2rgba (c, a)
	Convert an rgb to rgba color.
	G2Drgb2bgr (c)
	Convert an rgb or bgr color to rgb or bgr color.
	G2Dgetbgr (c)
	Get bgr color.
	G2Dgetrgb (c)
	Get rgb color.
	G2Dhsv2rgb (h, s, v)
	Convert an hsv color to rgb color.
	G2Drgb2hsv (c)
	Convert an rgb color to hsv color.
	G2DaddColor (c1, c2)
	Add colors.
	G2DsubColor (c1, c2)
	Substract colors.
	G2DmulColor (c1, c2)
	Multiply colors.
	G2DColorCoef (c1, coef)
	Multiply a Color by coef.

Detailed Description

Color manipulation

Function Documentation

G2DformatHexaColor()

G2DformatHexaColor

(

s

)

Add missed colors in hexa format.

Prototype: fun [S] S

Parameters

S	: hexa color

Returns

S : formated color

G2DformatHexaColorI()

G2DformatHexaColorI

(

c

)

format color to hexadecimal value

Prototype: fun [I] S

Parameters

I

: color

Returns

S : formated color

G2Drgba2bgra()

G2Drgba2bgra

(

c

)

Convert an rgba or bgra color to rgba or bgra color.

Prototype: fun [I] I

Parameters

I	: rgba or bgra color

Returns

I : invert rgba or bgra color

G2DgetAlphaFromColor()

G2DgetAlphaFromColor

(

c

)

get the alpha from a alpha color

Prototype: fun [I] I

Parameters

I	: rgba or bgra color

Returns

I : alpha

G2DsetColorAlpha()

G2DsetColorAlpha	(	c	,
		a
	)

set the alpha of a color

Prototype: fun [I I] I

Parameters

I	: rgba or bgra color
I	: alpha

Returns

I : new color

G2Dbgra2bgr()

G2Dbgra2bgr

(

c

)

Convert an bgra or bgr color.

Prototype: fun [I] I

Parameters

I	: bgr color

Returns

I : bgr color

G2Drgba2rgb()

G2Drgba2rgb

(

c

)

Convert an rgba or rgb color.

Prototype: fun [I] I

Parameters

I	: rgba color

Returns

I : rgb color

G2Dbgr2bgra()

G2Dbgr2bgra	(	c	,
		a
	)

Convert an bgr to bgra color.

Prototype: fun [I I] I

Parameters

I	: bgr color
I	: alpha

Returns

I : bgra color

G2Drgb2rgba()

G2Drgb2rgba	(	c	,
		a
	)

Convert an rgb to rgba color.

Prototype: fun [I I] I

Parameters

I	: rgb color
I	: alpha

Returns

I : rgba color

G2Drgb2bgr()

G2Drgb2bgr

(

c

)

Convert an rgb or bgr color to rgb or bgr color.

Prototype: fun [I] I

Parameters

I	: rgb or bgr color

Returns

I : invert rgb or bgr color

G2Dgetbgr()

G2Dgetbgr

(

c

)

Get bgr color.

Prototype: fun [I] [I I I]

Parameters

I	: rgb color or nil for black

Returns

[I I I] : [b g r] tuple

G2Dgetrgb()

G2Dgetrgb

(

c

)

Get rgb color.

Prototype: fun [I] [I I I]

Parameters

I	: rgb color

Returns

[I I I] : [r g b] tuple

G2Dhsv2rgb()

G2Dhsv2rgb	(	h	,
		s	,
		v
	)

Convert an hsv color to rgb color.

Prototype: fun [F F F] I

Parameters

F	: h float
F	: s float
F	: v float

Returns

I : rgb color

G2Drgb2hsv()

G2Drgb2hsv

(

c

)

Convert an rgb color to hsv color.

Prototype: fun [I] [F F F]

Parameters

I	: rgb color

Returns

[F F F] : [h s v] color

G2DaddColor()

G2DaddColor	(	c1	,
		c2
	)

Add colors.

Prototype: fun [I I] I

Parameters

I	: color 1
I	: color 2

Returns

I : new color

G2DsubColor()

G2DsubColor	(	c1	,
		c2
	)

Substract colors.

Prototype: fun [I I] I

Parameters

I	: color 1
I	: color 2

Returns

I : new color

G2DmulColor()

G2DmulColor	(	c1	,
		c2
	)

Multiply colors.

Prototype: fun [I I] I

Parameters

I	: color 1
I	: color 2

Returns

I : new color

G2DColorCoef()

G2DColorCoef	(	c1	,
		coef
	)

Multiply a Color by coef.

Prototype: fun [I F] I

Parameters

I	: RGB color
F	: coef

Returns

I : new color