class

Gosu::Color

Represents an ARGB color value with 8 bits for each channel. Colors can be used interchangeably with integer literals of the form 0xAARRGGBB in all Gosu APIs.

Constants

AQUA = Gosu::Color.argb(4278255615_i64)

BLACK = Gosu::Color.argb(4278190080_i64)

BLUE = Gosu::Color.argb(4278190335_i64)

CYAN = Gosu::Color.argb(4278255615_i64)

FUCHSIA = Gosu::Color.argb(4294902015_i64)

GRAY = Gosu::Color.argb(4286611584_i64)

GREEN = Gosu::Color.argb(4278255360_i64)

NONE = Gosu::Color.argb(0)

RED = Gosu::Color.argb(4294901760_i64)

WHITE = Gosu::Color.argb(4294967295_i64)

YELLOW = Gosu::Color.argb(4294967040_i64)

Constructors

new(alpha : UInt8 | Int32, red : UInt8 | Int32, green : UInt8 | Int32, blue : UInt8 | Int32)

Creates color from four unsigned 8-bit integers.

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new(color : UInt32)

Creates color from 0xAARRGGBB integer literal.

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Class methods

argb(alpha : UInt8 | Int32, red : UInt8 | Int32, green : UInt8 | Int32, blue : UInt8 | Int32) : Gosu::Color

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argb(color : UInt32) : Gosu::Color

Creates color from 0xAARRGGBB integer literal.

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from_ahsv(alpha : UInt8 | Int32, hue : Float64, saturation : Float64, value : Float64) : Gosu::Color

Converts an HSV triplet to a color with the alpha channel set to a given value.

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from_hsv(hue : Float64, saturation : Float64, value : Float64) : Gosu::Color

Converts an HSV triplet to an opaque color.

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rgb(red : UInt8 | Int32, green : UInt8 | Int32, blue : UInt8 | Int32) : Gosu::Color

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rgba(red : UInt8 | Int32, green : UInt8 | Int32, blue : UInt8 | Int32, alpha : UInt8 | Int32) : Gosu::Color

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safe_to_u8(value : Int32 | UInt8) : UInt8

Converts Int32 to UInt8 safely, by clamping value to range [0; 255] then converting to UInt8.

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Instance methods

==(other : Gosu::Color) : Bool

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alpha

Returns the color's alpha channel.

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alpha=(value : UInt8 | Int32) : UInt32

Set the color's alpha channel.

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blue

Returns the color's blue channel.

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blue=(value : UInt8 | Int32) : UInt32

Sets the color's green channel.

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eql?(other) : Bool

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Returns a 32-bit representation of the color suitable for use with OpenGL calls. This color is stored in a fixed order in memory and its integer value may vary depending on your system's byte order.

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green

Returns the color's green channel.

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green=(value : UInt8 | Int32) : UInt32

Sets the color's green channel.

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hash

Generates an UInt64 hash value for this object.

This method must have the property that a == b implies a.hash == b.hash.

The hash value is used along with == by the Hash class to determine if two objects reference the same hash key.

Subclasses must not override this method. Instead, they must define hash(hasher), though usually the macro def_hash can be used to generate this method.

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hue

Returns the color's hue.

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hue=(value : Float64 | Int32) : UInt32

Sets the color's hue.

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red

Returns the color's red channel.

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red=(value : UInt8 | Int32) : UInt32

Sets the color's red channel.