@senspark/ee/dist/HsvUtils.js

utility library for cocos creator

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var gl = require("gl-matrix");
var rwgt = 0.3086;
var gwgt = 0.6094;
var bwgt = 0.0820;
function transformRGB(m, r, g, b) {
    return [
        r * m[0] + g * m[4] + b * m[8] + m[12],
        r * m[1] + g * m[5] + b * m[9] + m[13],
        r * m[2] + g * m[6] + b * m[10] + m[14],
    ];
}
function createShearZMatrix(x, y) {
    var matrix = gl.mat4.create();
    matrix[2] = x;
    matrix[6] = y;
    return matrix;
}
function createHueMatrix(degrees) {
    var m = gl.mat4.create();
    var temp = gl.mat4.create();
    // Rotate the grey vector into positive Z.
    // Sin = 1/sqrt(2).
    // Cos = 1/sqrt(2).
    gl.mat4.multiply(m, m, gl.mat4.fromXRotation(temp, Math.PI / 4));
    // Sin = -1/sqrt(3).
    // Cos = sqrt(2/3).
    gl.mat4.multiply(m, m, gl.mat4.fromYRotation(temp, -0.615479709));
    // Shear the space to make the luminance plane horizontal.
    var _a = transformRGB(m, rwgt, gwgt, bwgt), lx = _a[0], ly = _a[1], lz = _a[2];
    var zsx = lx / lz;
    var zsy = ly / lz;
    gl.mat4.multiply(m, m, createShearZMatrix(zsx, zsy));
    var converter = (cc.ENGINE_VERSION >= '2' ? cc.misc.degreesToRadians : cc.degreesToRadians);
    // Rotate the hue.
    gl.mat4.multiply(m, m, gl.mat4.fromZRotation(temp, converter(degrees)));
    // Unshear the space to put the luminance plane back.
    gl.mat4.multiply(m, m, createShearZMatrix(-zsx, -zsy));
    // Rotate the grey vector back into place.
    // Sin = 1/sqrt(3).
    // Cos = sqrt(2/3);
    gl.mat4.multiply(m, m, gl.mat4.fromYRotation(temp, 0.615479709));
    // Sin = -1/sqrt(2).
    // Cos = 1/sqrt(2).
    gl.mat4.multiply(m, m, gl.mat4.fromXRotation(temp, -Math.PI / 4));
    return m;
}
exports.createHueMatrix = createHueMatrix;
function createSaturationMatrix(s) {
    var m = gl.mat4.create();
    m[0] = (1 - s) * rwgt + s;
    m[1] = (1 - s) * rwgt;
    m[2] = (1 - s) * rwgt;
    m[4] = (1 - s) * gwgt;
    m[5] = (1 - s) * gwgt + s;
    m[6] = (1 - s) * gwgt;
    m[8] = (1 - s) * bwgt;
    m[9] = (1 - s) * bwgt;
    m[10] = (1 - s) * bwgt + s;
    m[15] = 1.0;
    return m;
}
exports.createSaturationMatrix = createSaturationMatrix;
function createContrastMatrix(r, g, b) {
    var m = createBrightnesMatrix((1 - r) / 2, (1 - g) / 2, (1 - b) / 2);
    m[0] = r;
    m[5] = g;
    m[10] = b;
    return m;
}
exports.createContrastMatrix = createContrastMatrix;
function createBrightnesMatrix(r, g, b) {
    var m = gl.mat4.create();
    return gl.mat4.fromTranslation(m, [r, g, b]);
}
exports.createBrightnesMatrix = createBrightnesMatrix;