thx.color

Color library for Haxe. Supports the following color spaces:

• Lab (AKA Lab)
• LCh (AKA HCL)
• Luv (or LUV)
• Cmy
• Cmyk
• CubeHelix
• Grey
• Hsl(a)
• Hsv(a) (AKA HSB)
• HunterLab
• Rgb(a)
• Rgbx(a) (an high resolution version of RGB)
• Temperature
• Xyz
• Yuv
• Yxy

With conversion from/to any color space (notice that you can lose some information in the conversion).

intro

API uses abstracts to make it easy to create colors from strings and numbers.

    var rgb : Rgb = "#cf8700";
    trace(rgb.green);

Some examples from Demo.

Hsl Rainbow

var left  : Hsl = 'hsl(0,100%,0%)',
    right : Hsl = 'hsl(359.99,100%,0%)';
return function(x : Float, y : Float) : Rgb {
  return left.interpolate(right, x).lighter(y);
};

Hsv Interpolation

var left  : Hsv = 'hsv(160deg,100%,63%)',
    right : Hsv = 'hsv(345deg,88%,77%)';
return function(t : Float) : Rgb
    return (left : Hsv).interpolate(right, t);

Lighter Rgb

var left : Rgb = '#0000ff';
return left.lighter;

Named Colors Table

var columns = 5,
    colors  = Color.names.keys().toArray().filter(function(n) return n.indexOf(' ') < 0),
    cellw   = w / columns,
    cellh   = h / Math.ceil(colors.length / columns);
ctx.textAlign = "center";
ctx.textBaseline = "middle";
ctx.font = '${Math.round(cellh*0.4)}px Verdana, sans-serif';
colors.mapi(function(name, i) {
    var col   = i % columns,
        row   = Math.floor(i / columns),
        color = Color.names.get(name);

    ctx.fillStyle = color.toString();
    ctx.fillRect(col * cellw, row * cellh, cellw, cellh);

    ctx.fillStyle = color.toRgbx()
        .toPerceivedGrey()
        .contrast()
        .toRgb().toString();
    ctx.fillText(
        name,
        Math.round(col * cellw + cellw / 2) + 0.5,
        Math.round(row * cellh + cellh / 2) + 0.5,
        cellw);
});

To run Demo, you need nodejs and the Canvas library (npm install canvas);

Note: API might still change before version 1.

install

From the command line just type:

haxelib install thx.color

To use the dev version do:

haxelib git thx.color https://github.com/fponticelli/thx.color.git