122 lines
2.4 KiB
JavaScript
122 lines
2.4 KiB
JavaScript
export class RGBColor
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{
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constructor (r, g, b)
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{
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this.r = r; // 0 .. 255
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this.g = g; // 0 .. 255
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this.b = b; // 0 .. 255
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}
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Set (r, g, b)
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{
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this.r = r;
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this.g = g;
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this.b = b;
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}
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Clone ()
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{
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return new RGBColor (this.r, this.g, this.b);
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}
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}
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export class RGBAColor
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{
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constructor (r, g, b, a)
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{
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this.r = r; // 0 .. 255
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this.g = g; // 0 .. 255
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this.b = b; // 0 .. 255
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this.a = a; // 0 .. 255
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}
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Set (r, g, b, a)
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{
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this.r = r;
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this.g = g;
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this.b = b;
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this.a = a;
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}
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Clone ()
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{
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return new RGBAColor (this.r, this.g, this.b, this.a);
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}
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}
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export function ColorComponentFromFloat (component)
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{
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return parseInt (Math.round (component * 255.0), 10);
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}
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export function ColorComponentToFloat (component)
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{
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return component / 255.0;
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}
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export function RGBColorFromFloatComponents (r, g, b)
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{
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return new RGBColor (
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ColorComponentFromFloat (r),
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ColorComponentFromFloat (g),
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ColorComponentFromFloat (b)
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);
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}
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export function SRGBToLinear (component)
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{
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if (component < 0.04045) {
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return component * 0.0773993808;
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} else {
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return Math.pow (component * 0.9478672986 + 0.0521327014, 2.4);
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}
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}
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export function LinearToSRGB (component)
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{
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if (component < 0.0031308) {
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return component * 12.92;
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} else {
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return 1.055 * (Math.pow (component, 0.41666)) - 0.055;
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}
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}
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export function IntegerToHexString (intVal)
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{
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let result = parseInt (intVal, 10).toString (16);
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while (result.length < 2) {
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result = '0' + result;
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}
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return result;
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}
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export function RGBColorToHexString (color)
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{
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let r = IntegerToHexString (color.r);
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let g = IntegerToHexString (color.g);
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let b = IntegerToHexString (color.b);
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return r + g + b;
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}
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export function HexStringToRGBColor (hexString)
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{
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if (hexString.length !== 6) {
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return null;
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}
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let r = parseInt (hexString.substring (0, 2), 16);
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let g = parseInt (hexString.substring (2, 4), 16);
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let b = parseInt (hexString.substring (4, 6), 16);
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return new RGBColor (r, g, b);
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}
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export function ArrayToRGBColor (arr)
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{
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return new RGBColor (arr[0], arr[1], arr[2]);
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}
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export function RGBColorIsEqual (a, b)
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{
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return a.r === b.r && a.g === b.g && a.b === b.b;
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}
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