Interface IColorValue<TSelf>

Namespace

Egami.Colors

Assembly

Egami.dll

A color value in one color model, convertible to and from CIE XYZ (D65) and sRGB pixels, so ColorConvert can convert between any two models and between pixels and values.

public interface IColorValue<TSelf> where TSelf : struct, IColorValue<TSelf>

Type Parameters

TSelf

The color value type.

Examples

// Color values in the models apps ask for, from and to pixels, and between each other.
Rgba8 orange = new(240, 128, 32, 255);
HslColor hsl = HslColor.From(orange);                          // hue 28°, saturation 0.87, lightness 0.53
LabColor lab = ColorConvert.Convert<HslColor, LabColor>(hsl);  // through XYZ
OklchColor oklch = OklchColor.From(orange);
YCbCrColor jpeg = YCbCrColor.From(orange);                     // BT.601 full range, as JPEG
YCbCrColor video = YCbCrColor.From(orange, YuvMatrix.Bt709, YuvRange.Limited);

// Color difference: CIEDE2000 on Lab, distance on Oklab.
double deltaE = lab.DeltaE2000(LabColor.From(new Rgba8(235, 130, 40, 255)));

// Whole rows at once, from any pixel type and encoding.
Rgba8[] pixels = [orange, new(10, 20, 30, 255)];
OklabColor[] row = new OklabColor[pixels.Length];
ColorConvert.FromPixels<Rgba8, OklabColor>(pixels, row);
ColorConvert.FromPixels<Rgba8, OklabColor>(pixels, row, ColorProfile.DisplayP3);   // the same pixels read as Display P3

Methods

From(Rgba8)

Returns the value of an sRGB pixel; alpha is ignored.

public static abstract TSelf From(Rgba8 color)

Parameters

color Rgba8

The pixel.

Returns

TSelf

The value.

From(RgbaF32)

Returns the value of an sRGB pixel, whose channels may be outside 0..1; alpha is ignored.

public static abstract TSelf From(RgbaF32 color)

Parameters

color RgbaF32

The pixel.

Returns

TSelf

The value.

FromXyz(XyzColor)

Returns the value for an XYZ color (D65, white Y = 1).

public static abstract TSelf FromXyz(XyzColor xyz)

Parameters

xyz XyzColor

The color.

Returns

TSelf

The value; components may fall outside their usual range for colors outside sRGB.

IsCloseTo(TSelf, float)

Returns whether every component of the two values differs by at most tolerance.

bool IsCloseTo(TSelf other, float tolerance = 0.0001)

Parameters

other TSelf

The other value.

tolerance float

The largest difference allowed in a component.

Returns

bool

true if they are that close.

ToRgba8()

Returns the color as an opaque sRGB pixel, each channel clamped into range.

Rgba8 ToRgba8()

Returns

Rgba8

The pixel.

ToRgbaF32()

Returns the color as an opaque sRGB pixel, unclamped, so colors outside sRGB keep channels outside 0..1.

RgbaF32 ToRgbaF32()

Returns

RgbaF32

The pixel.

ToXyz()

Returns the color as XYZ (D65, white Y = 1).

XyzColor ToXyz()

Returns

XyzColor

The color.