gfxRGBA Struct Reference

A color value, storing red, green, blue and alpha components. More...

#include <gfxColor.h>

List of all members.

Public Types
enum	PackedColorType {   PACKED_ABGR, PACKED_ABGR_PREMULTIPLIED, PACKED_ARGB, PACKED_ARGB_PREMULTIPLIED,   PACKED_XBGR, PACKED_XRGB }
Public Member Functions
	gfxRGBA ()
	gfxRGBA (const gfxRGBA &c)
	gfxRGBA (gfxFloat _r, gfxFloat _g, gfxFloat _b, gfxFloat _a=1.0)
	Intialize this color using explicit red, green, blue and alpha values.
	gfxRGBA (PRUint32 c, PackedColorType colorType=PACKED_ABGR)
	Initialize this color from a packed 32-bit color.
bool	operator== (const gfxRGBA &other) const
	Initialize this color by parsing the given string.
PRUint32	Packed (PackedColorType colorType=PACKED_ABGR) const
	Returns this color value as a packed 32-bit integer.
Public Attributes
gfxFloat	r
gfxFloat	g
gfxFloat	b
gfxFloat	a

---

Detailed Description

A color value, storing red, green, blue and alpha components.

This class does not use premultiplied alpha.

XXX should this use doubles (instead of gfxFloat), for consistency with cairo?

---

Member Enumeration Documentation

enum gfxRGBA::PackedColorType

Enumerator:

PACKED_ABGR
PACKED_ABGR_PREMULTIPLIED
PACKED_ARGB
PACKED_ARGB_PREMULTIPLIED
PACKED_XBGR
PACKED_XRGB

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Constructor & Destructor Documentation

gfxRGBA::gfxRGBA

(

)

[inline]

gfxRGBA::gfxRGBA

(

const gfxRGBA &

c

)

[inline]

gfxRGBA::gfxRGBA	(	gfxFloat	_r,
		gfxFloat	_g,
		gfxFloat	_b,
		gfxFloat	_a = 1.0
	)			[inline]

Intialize this color using explicit red, green, blue and alpha values.

gfxRGBA::gfxRGBA	(	PRUint32	c,
		PackedColorType	colorType = PACKED_ABGR
	)			[inline]

Initialize this color from a packed 32-bit color.

The color value is interpreted based on colorType; all values use the native platform endianness.

See also:

gfxRGBA::Packed

---

Member Function Documentation

bool gfxRGBA::operator==

(

const gfxRGBA &

other

)

const [inline]

Initialize this color by parsing the given string.

XXX implement me!

PRUint32 gfxRGBA::Packed

(

PackedColorType

colorType = PACKED_ABGR

)

const [inline]

Returns this color value as a packed 32-bit integer.

This reconstructs the int32 based on the given colorType, always in the native byte order.

Note: gcc 4.2.3 on at least Ubuntu (x86) does something strange with (PRUint8)(c * 255.0) << x, where the result is different than double d = c * 255.0; v = ((PRUint8) d) << x.

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Member Data Documentation

gfxFloat gfxRGBA::a

gfxFloat gfxRGBA::b

gfxFloat gfxRGBA::g

gfxFloat gfxRGBA::r

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

• gfxColor.h