Color

Represents a color that can be choose by the user in different kinds (RGB, HSV, HSL, grayscale, indexed).

Don't confuse this color with the app.pixelColor which is used to put/get pixels to/from an image.

Color()

local c
c = Color{ r=255, g=255, b=255, a=255 }
c = Color{ h=360.0, s=1.0, v=1.0, a=255 }
c = Color{ h=360.0, s=1.0, l=1.0, a=255 }
c = Color{ red=255, green=255, blue=255, alpha=255 }
c = Color{ hue=360.0, saturation=1.0, value=1.0, alpha=255 }
c = Color{ hue=360.0, saturation=1.0, lightness=1.0, alpha=255 }
c = Color{ gray=255, alpha=255 }
c = Color{ index=integer }
c = Color(integer)

If alpha argument is not specified, it's 255 by default (opacity = 100%).
The Color(integer) constructor receives a pixel color and the integer is interpreted depending on the active sprite.

Color.alpha

local c = Color{ r=0, g=0, b=0, a=128 }
assert(c.alpha == 128)

Color.red/green/blue

local c = Color{ r=255, g=128, b=32 }
assert(c.red   == 255)
assert(c.green == 128)
assert(c.blue  == 32)
c.red   = 20
c.green = 40
c.blue  = 255

Get/sets red/green/blue components of the color.

Color.hsvHue/Saturation/Value

local c = Color{ h=45, s=0.5, v=0.2 }
assert(c.hsvHue        == 45)
assert(c.hsvSaturation == 0.5)
assert(c.hsvValue      == 0.2)

Color.hslHue/Saturation/Lightness

Color.hue

Gets/sets the HSV hue or HSL hue depending on the kind of color.

Color.saturation

Gets/sets the HSV saturation or HSL saturation depending on the kind of color.

Color.value

Gets/sets the HSV value.

Color.lightness

Gets/sets the HSL lightness.

Color.index

local c = Color(index)
oldIndex = c.index
c.index = newIndex

Gets or sets the palette index related to this color. If the color is not an index, i.e. it's RGB/HSL/HSV, the closest palette index of the current palette (the palette of the active sprite) that matches the RGB/HSL/HSV values will be returned.

Color.gray

Color.rgbaPixel

local c = Color{ r=200, g=100, b=0, a=255 }
assert(c.rgbaPixel == app.pixelColor.rgba(200, 100, 0, 255))

Returns the pixel color which is equivalent to the RGBA values of this color.

Color.grayPixel

Returns the pixel color which is equivalent to the gray+alpha values of this color.

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