mirror of
https://github.com/jellyfin/jellyfin-web
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simplify vibrant
This commit is contained in:
Luke Pulverenti
parent
dc66936c08
commit
353dd8d067
1 changed files with 356 additions and 359 deletions
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@ -504,380 +504,377 @@ module.exports = MMCQ.quantize
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Google - Palette support library in Android
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*/
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(function() {
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var CanvasImage, Swatch, Vibrant,
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bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; },
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slice = [].slice;
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var CanvasImage, Swatch, Vibrant,
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bind = function (fn, me) { return function () { return fn.apply(me, arguments); }; },
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slice = [].slice;
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window.Swatch = Swatch = (function() {
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Swatch.prototype.hsl = void 0;
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window.Swatch = Swatch = (function () {
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Swatch.prototype.hsl = void 0;
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Swatch.prototype.rgb = void 0;
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Swatch.prototype.rgb = void 0;
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Swatch.prototype.population = 1;
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Swatch.prototype.population = 1;
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Swatch.yiq = 0;
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Swatch.yiq = 0;
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function Swatch(rgb, population) {
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this.rgb = rgb;
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this.population = population;
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}
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function Swatch(rgb, population) {
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this.rgb = rgb;
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this.population = population;
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}
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Swatch.prototype.getHsl = function() {
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if (!this.hsl) {
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return this.hsl = Vibrant.rgbToHsl(this.rgb[0], this.rgb[1], this.rgb[2]);
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} else {
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return this.hsl;
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}
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};
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Swatch.prototype.getPopulation = function() {
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return this.population;
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};
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Swatch.prototype.getRgb = function() {
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return this.rgb;
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};
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Swatch.prototype.getHex = function() {
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return "#" + ((1 << 24) + (this.rgb[0] << 16) + (this.rgb[1] << 8) + this.rgb[2]).toString(16).slice(1, 7);
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};
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Swatch.prototype.getTitleTextColor = function() {
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this._ensureTextColors();
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if (this.yiq < 200) {
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return "#fff";
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} else {
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return "#000";
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}
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};
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Swatch.prototype.getBodyTextColor = function() {
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this._ensureTextColors();
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if (this.yiq < 150) {
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return "#fff";
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} else {
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return "#000";
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}
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};
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Swatch.prototype._ensureTextColors = function() {
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if (!this.yiq) {
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return this.yiq = (this.rgb[0] * 299 + this.rgb[1] * 587 + this.rgb[2] * 114) / 1000;
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}
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};
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return Swatch;
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})();
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window.Vibrant = Vibrant = (function() {
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Vibrant.prototype.quantize = require('quantize');
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Vibrant.prototype._swatches = [];
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Vibrant.prototype.TARGET_DARK_LUMA = 0.26;
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Vibrant.prototype.MAX_DARK_LUMA = 0.45;
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Vibrant.prototype.MIN_LIGHT_LUMA = 0.55;
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Vibrant.prototype.TARGET_LIGHT_LUMA = 0.74;
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Vibrant.prototype.MIN_NORMAL_LUMA = 0.3;
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Vibrant.prototype.TARGET_NORMAL_LUMA = 0.5;
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Vibrant.prototype.MAX_NORMAL_LUMA = 0.7;
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Vibrant.prototype.TARGET_MUTED_SATURATION = 0.3;
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Vibrant.prototype.MAX_MUTED_SATURATION = 0.4;
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Vibrant.prototype.TARGET_VIBRANT_SATURATION = 1;
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Vibrant.prototype.MIN_VIBRANT_SATURATION = 0.35;
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Vibrant.prototype.WEIGHT_SATURATION = 3;
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Vibrant.prototype.WEIGHT_LUMA = 6;
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Vibrant.prototype.WEIGHT_POPULATION = 1;
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Vibrant.prototype.VibrantSwatch = void 0;
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Vibrant.prototype.MutedSwatch = void 0;
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Vibrant.prototype.DarkVibrantSwatch = void 0;
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Vibrant.prototype.DarkMutedSwatch = void 0;
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Vibrant.prototype.LightVibrantSwatch = void 0;
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Vibrant.prototype.LightMutedSwatch = void 0;
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Vibrant.prototype.HighestPopulation = 0;
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function Vibrant(sourceImage, colorCount, quality) {
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this.swatches = bind(this.swatches, this);
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var a, allPixels, b, cmap, g, i, image, imageData, offset, pixelCount, pixels, r;
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if (typeof colorCount === 'undefined') {
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colorCount = 16;
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}
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if (typeof quality === 'undefined') {
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quality = 5;
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}
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image = new CanvasImage(sourceImage);
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try {
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imageData = image.getImageData();
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pixels = imageData.data;
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pixelCount = image.getPixelCount();
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allPixels = [];
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i = 0;
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while (i < pixelCount) {
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offset = i * 4;
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r = pixels[offset + 0];
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g = pixels[offset + 1];
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b = pixels[offset + 2];
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a = pixels[offset + 3];
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if (a >= 125) {
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if (!(r > 250 && g > 250 && b > 250)) {
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allPixels.push([r, g, b]);
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Swatch.prototype.getHsl = function () {
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if (!this.hsl) {
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return this.hsl = Vibrant.rgbToHsl(this.rgb[0], this.rgb[1], this.rgb[2]);
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} else {
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return this.hsl;
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}
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};
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Swatch.prototype.getPopulation = function () {
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return this.population;
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};
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Swatch.prototype.getRgb = function () {
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return this.rgb;
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};
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Swatch.prototype.getHex = function () {
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return "#" + ((1 << 24) + (this.rgb[0] << 16) + (this.rgb[1] << 8) + this.rgb[2]).toString(16).slice(1, 7);
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};
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Swatch.prototype.getTitleTextColor = function () {
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this._ensureTextColors();
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if (this.yiq < 200) {
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return "#fff";
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} else {
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return "#000";
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}
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};
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Swatch.prototype.getBodyTextColor = function () {
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this._ensureTextColors();
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if (this.yiq < 150) {
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return "#fff";
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} else {
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return "#000";
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}
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};
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Swatch.prototype._ensureTextColors = function () {
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if (!this.yiq) {
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return this.yiq = (this.rgb[0] * 299 + this.rgb[1] * 587 + this.rgb[2] * 114) / 1000;
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}
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};
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return Swatch;
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})();
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window.Vibrant = Vibrant = (function () {
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Vibrant.prototype.quantize = require('quantize');
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Vibrant.prototype._swatches = [];
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Vibrant.prototype.TARGET_DARK_LUMA = 0.26;
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Vibrant.prototype.MAX_DARK_LUMA = 0.45;
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Vibrant.prototype.MIN_LIGHT_LUMA = 0.55;
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Vibrant.prototype.TARGET_LIGHT_LUMA = 0.74;
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Vibrant.prototype.MIN_NORMAL_LUMA = 0.3;
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Vibrant.prototype.TARGET_NORMAL_LUMA = 0.5;
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Vibrant.prototype.MAX_NORMAL_LUMA = 0.7;
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Vibrant.prototype.TARGET_MUTED_SATURATION = 0.3;
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Vibrant.prototype.MAX_MUTED_SATURATION = 0.4;
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Vibrant.prototype.TARGET_VIBRANT_SATURATION = 1;
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Vibrant.prototype.MIN_VIBRANT_SATURATION = 0.35;
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Vibrant.prototype.WEIGHT_SATURATION = 3;
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Vibrant.prototype.WEIGHT_LUMA = 6;
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Vibrant.prototype.WEIGHT_POPULATION = 1;
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Vibrant.prototype.VibrantSwatch = void 0;
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Vibrant.prototype.MutedSwatch = void 0;
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Vibrant.prototype.DarkVibrantSwatch = void 0;
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Vibrant.prototype.DarkMutedSwatch = void 0;
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Vibrant.prototype.LightVibrantSwatch = void 0;
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Vibrant.prototype.LightMutedSwatch = void 0;
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Vibrant.prototype.HighestPopulation = 0;
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function Vibrant(sourceImage, colorCount, quality) {
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this.swatches = bind(this.swatches, this);
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var a, allPixels, b, cmap, g, i, image, imageData, offset, pixelCount, pixels, r;
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if (typeof colorCount === 'undefined') {
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colorCount = 16;
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}
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if (typeof quality === 'undefined') {
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quality = 5;
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}
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image = new CanvasImage(sourceImage);
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try {
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imageData = image.getImageData();
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pixels = imageData.data;
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pixelCount = image.getPixelCount();
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allPixels = [];
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i = 0;
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while (i < pixelCount) {
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offset = i * 4;
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r = pixels[offset + 0];
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g = pixels[offset + 1];
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b = pixels[offset + 2];
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a = pixels[offset + 3];
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if (a >= 125) {
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if (!(r > 250 && g > 250 && b > 250)) {
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allPixels.push([r, g, b]);
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}
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}
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i = i + quality;
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}
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cmap = this.quantize(allPixels, colorCount);
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this._swatches = cmap.vboxes.map((function (_this) {
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return function (vbox) {
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return new Swatch(vbox.color, vbox.vbox.count());
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};
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})(this));
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this.maxPopulation = this.findMaxPopulation;
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this.generateVarationColors();
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this.generateEmptySwatches();
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} finally {
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image.removeCanvas();
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}
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}
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i = i + quality;
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}
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cmap = this.quantize(allPixels, colorCount);
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this._swatches = cmap.vboxes.map((function(_this) {
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return function(vbox) {
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return new Swatch(vbox.color, vbox.vbox.count());
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};
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})(this));
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this.maxPopulation = this.findMaxPopulation;
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this.generateVarationColors();
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this.generateEmptySwatches();
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} finally {
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image.removeCanvas();
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}
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}
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Vibrant.prototype.generateVarationColors = function() {
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this.VibrantSwatch = this.findColorVariation(this.TARGET_NORMAL_LUMA, this.MIN_NORMAL_LUMA, this.MAX_NORMAL_LUMA, this.TARGET_VIBRANT_SATURATION, this.MIN_VIBRANT_SATURATION, 1);
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this.LightVibrantSwatch = this.findColorVariation(this.TARGET_LIGHT_LUMA, this.MIN_LIGHT_LUMA, 1, this.TARGET_VIBRANT_SATURATION, this.MIN_VIBRANT_SATURATION, 1);
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this.DarkVibrantSwatch = this.findColorVariation(this.TARGET_DARK_LUMA, 0, this.MAX_DARK_LUMA, this.TARGET_VIBRANT_SATURATION, this.MIN_VIBRANT_SATURATION, 1);
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this.MutedSwatch = this.findColorVariation(this.TARGET_NORMAL_LUMA, this.MIN_NORMAL_LUMA, this.MAX_NORMAL_LUMA, this.TARGET_MUTED_SATURATION, 0, this.MAX_MUTED_SATURATION);
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this.LightMutedSwatch = this.findColorVariation(this.TARGET_LIGHT_LUMA, this.MIN_LIGHT_LUMA, 1, this.TARGET_MUTED_SATURATION, 0, this.MAX_MUTED_SATURATION);
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return this.DarkMutedSwatch = this.findColorVariation(this.TARGET_DARK_LUMA, 0, this.MAX_DARK_LUMA, this.TARGET_MUTED_SATURATION, 0, this.MAX_MUTED_SATURATION);
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};
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Vibrant.prototype.generateVarationColors = function () {
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this.VibrantSwatch = this.findColorVariation(this.TARGET_NORMAL_LUMA, this.MIN_NORMAL_LUMA, this.MAX_NORMAL_LUMA, this.TARGET_VIBRANT_SATURATION, this.MIN_VIBRANT_SATURATION, 1);
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this.LightVibrantSwatch = this.findColorVariation(this.TARGET_LIGHT_LUMA, this.MIN_LIGHT_LUMA, 1, this.TARGET_VIBRANT_SATURATION, this.MIN_VIBRANT_SATURATION, 1);
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this.DarkVibrantSwatch = this.findColorVariation(this.TARGET_DARK_LUMA, 0, this.MAX_DARK_LUMA, this.TARGET_VIBRANT_SATURATION, this.MIN_VIBRANT_SATURATION, 1);
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this.MutedSwatch = this.findColorVariation(this.TARGET_NORMAL_LUMA, this.MIN_NORMAL_LUMA, this.MAX_NORMAL_LUMA, this.TARGET_MUTED_SATURATION, 0, this.MAX_MUTED_SATURATION);
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this.LightMutedSwatch = this.findColorVariation(this.TARGET_LIGHT_LUMA, this.MIN_LIGHT_LUMA, 1, this.TARGET_MUTED_SATURATION, 0, this.MAX_MUTED_SATURATION);
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return this.DarkMutedSwatch = this.findColorVariation(this.TARGET_DARK_LUMA, 0, this.MAX_DARK_LUMA, this.TARGET_MUTED_SATURATION, 0, this.MAX_MUTED_SATURATION);
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};
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Vibrant.prototype.generateEmptySwatches = function() {
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var hsl;
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if (this.VibrantSwatch === void 0) {
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if (this.DarkVibrantSwatch !== void 0) {
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hsl = this.DarkVibrantSwatch.getHsl();
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hsl[2] = this.TARGET_NORMAL_LUMA;
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this.VibrantSwatch = new Swatch(Vibrant.hslToRgb(hsl[0], hsl[1], hsl[2]), 0);
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Vibrant.prototype.generateEmptySwatches = function () {
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var hsl;
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if (this.VibrantSwatch === void 0) {
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if (this.DarkVibrantSwatch !== void 0) {
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hsl = this.DarkVibrantSwatch.getHsl();
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hsl[2] = this.TARGET_NORMAL_LUMA;
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this.VibrantSwatch = new Swatch(Vibrant.hslToRgb(hsl[0], hsl[1], hsl[2]), 0);
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}
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}
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if (this.DarkVibrantSwatch === void 0) {
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if (this.VibrantSwatch !== void 0) {
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hsl = this.VibrantSwatch.getHsl();
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hsl[2] = this.TARGET_DARK_LUMA;
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return this.DarkVibrantSwatch = new Swatch(Vibrant.hslToRgb(hsl[0], hsl[1], hsl[2]), 0);
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}
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}
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};
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Vibrant.prototype.findMaxPopulation = function () {
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var j, len, population, ref, swatch;
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population = 0;
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ref = this._swatches;
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for (j = 0, len = ref.length; j < len; j++) {
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swatch = ref[j];
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population = Math.max(population, swatch.getPopulation());
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}
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return population;
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};
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Vibrant.prototype.findColorVariation = function (targetLuma, minLuma, maxLuma, targetSaturation, minSaturation, maxSaturation) {
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var j, len, luma, max, maxValue, ref, sat, swatch, value;
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max = void 0;
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maxValue = 0;
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ref = this._swatches;
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for (j = 0, len = ref.length; j < len; j++) {
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swatch = ref[j];
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sat = swatch.getHsl()[1];
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luma = swatch.getHsl()[2];
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if (sat >= minSaturation && sat <= maxSaturation && luma >= minLuma && luma <= maxLuma && !this.isAlreadySelected(swatch)) {
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value = this.createComparisonValue(sat, targetSaturation, luma, targetLuma, swatch.getPopulation(), this.HighestPopulation);
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if (max === void 0 || value > maxValue) {
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max = swatch;
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maxValue = value;
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}
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}
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}
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return max;
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};
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Vibrant.prototype.createComparisonValue = function (saturation, targetSaturation, luma, targetLuma, population, maxPopulation) {
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return this.weightedMean(this.invertDiff(saturation, targetSaturation), this.WEIGHT_SATURATION, this.invertDiff(luma, targetLuma), this.WEIGHT_LUMA, population / maxPopulation, this.WEIGHT_POPULATION);
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};
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Vibrant.prototype.invertDiff = function (value, targetValue) {
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return 1 - Math.abs(value - targetValue);
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};
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Vibrant.prototype.weightedMean = function () {
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var i, sum, sumWeight, value, values, weight;
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values = 1 <= arguments.length ? slice.call(arguments, 0) : [];
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sum = 0;
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sumWeight = 0;
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i = 0;
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while (i < values.length) {
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value = values[i];
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weight = values[i + 1];
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sum += value * weight;
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sumWeight += weight;
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i += 2;
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}
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return sum / sumWeight;
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};
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Vibrant.prototype.swatches = function () {
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return {
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Vibrant: this.VibrantSwatch,
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Muted: this.MutedSwatch,
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DarkVibrant: this.DarkVibrantSwatch,
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DarkMuted: this.DarkMutedSwatch,
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LightVibrant: this.LightVibrantSwatch,
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LightMuted: this.LightMuted
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};
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};
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Vibrant.prototype.isAlreadySelected = function (swatch) {
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return this.VibrantSwatch === swatch || this.DarkVibrantSwatch === swatch || this.LightVibrantSwatch === swatch || this.MutedSwatch === swatch || this.DarkMutedSwatch === swatch || this.LightMutedSwatch === swatch;
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};
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Vibrant.rgbToHsl = function (r, g, b) {
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var d, h, l, max, min, s;
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r /= 255;
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g /= 255;
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b /= 255;
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max = Math.max(r, g, b);
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min = Math.min(r, g, b);
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h = void 0;
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s = void 0;
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l = (max + min) / 2;
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if (max === min) {
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h = s = 0;
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} else {
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d = max - min;
|
||||
s = l > 0.5 ? d / (2 - max - min) : d / (max + min);
|
||||
switch (max) {
|
||||
case r:
|
||||
h = (g - b) / d + (g < b ? 6 : 0);
|
||||
break;
|
||||
case g:
|
||||
h = (b - r) / d + 2;
|
||||
break;
|
||||
case b:
|
||||
h = (r - g) / d + 4;
|
||||
}
|
||||
h /= 6;
|
||||
}
|
||||
return [h, s, l];
|
||||
};
|
||||
|
||||
Vibrant.hslToRgb = function (h, s, l) {
|
||||
var b, g, hue2rgb, p, q, r;
|
||||
r = void 0;
|
||||
g = void 0;
|
||||
b = void 0;
|
||||
hue2rgb = function (p, q, t) {
|
||||
if (t < 0) {
|
||||
t += 1;
|
||||
}
|
||||
if (t > 1) {
|
||||
t -= 1;
|
||||
}
|
||||
if (t < 1 / 6) {
|
||||
return p + (q - p) * 6 * t;
|
||||
}
|
||||
if (t < 1 / 2) {
|
||||
return q;
|
||||
}
|
||||
if (t < 2 / 3) {
|
||||
return p + (q - p) * (2 / 3 - t) * 6;
|
||||
}
|
||||
return p;
|
||||
};
|
||||
if (s === 0) {
|
||||
r = g = b = l;
|
||||
} else {
|
||||
q = l < 0.5 ? l * (1 + s) : l + s - (l * s);
|
||||
p = 2 * l - q;
|
||||
r = hue2rgb(p, q, h + 1 / 3);
|
||||
g = hue2rgb(p, q, h);
|
||||
b = hue2rgb(p, q, h - (1 / 3));
|
||||
}
|
||||
return [r * 255, g * 255, b * 255];
|
||||
};
|
||||
|
||||
return Vibrant;
|
||||
|
||||
})();
|
||||
|
||||
|
||||
/*
|
||||
CanvasImage Class
|
||||
Class that wraps the html image element and canvas.
|
||||
It also simplifies some of the canvas context manipulation
|
||||
with a set of helper functions.
|
||||
Stolen from https://github.com/lokesh/color-thief
|
||||
*/
|
||||
|
||||
window.CanvasImage = CanvasImage = (function () {
|
||||
function CanvasImage(image) {
|
||||
|
||||
this.canvas = document.createElement('canvas');
|
||||
|
||||
this.context = this.canvas.getContext('2d');
|
||||
|
||||
var originalWidth = image.width;
|
||||
var originalHeight = image.height;
|
||||
|
||||
var maxArea = 300 * 300;
|
||||
var bitmapArea = originalWidth * originalHeight;
|
||||
var scaleRatio = 1;
|
||||
if (bitmapArea > maxArea) {
|
||||
scaleRatio = maxArea / bitmapArea;
|
||||
}
|
||||
|
||||
//console.log(scaleRatio);
|
||||
|
||||
this.width = this.canvas.width = originalWidth * scaleRatio;
|
||||
this.height = this.canvas.height = originalHeight * scaleRatio;
|
||||
|
||||
this.context.drawImage(image, 0, 0, originalWidth, originalHeight, 0, 0, this.width, this.height);
|
||||
}
|
||||
}
|
||||
if (this.DarkVibrantSwatch === void 0) {
|
||||
if (this.VibrantSwatch !== void 0) {
|
||||
hsl = this.VibrantSwatch.getHsl();
|
||||
hsl[2] = this.TARGET_DARK_LUMA;
|
||||
return this.DarkVibrantSwatch = new Swatch(Vibrant.hslToRgb(hsl[0], hsl[1], hsl[2]), 0);
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
Vibrant.prototype.findMaxPopulation = function() {
|
||||
var j, len, population, ref, swatch;
|
||||
population = 0;
|
||||
ref = this._swatches;
|
||||
for (j = 0, len = ref.length; j < len; j++) {
|
||||
swatch = ref[j];
|
||||
population = Math.max(population, swatch.getPopulation());
|
||||
}
|
||||
return population;
|
||||
};
|
||||
CanvasImage.prototype.getPixelCount = function () {
|
||||
return this.width * this.height;
|
||||
};
|
||||
|
||||
Vibrant.prototype.findColorVariation = function(targetLuma, minLuma, maxLuma, targetSaturation, minSaturation, maxSaturation) {
|
||||
var j, len, luma, max, maxValue, ref, sat, swatch, value;
|
||||
max = void 0;
|
||||
maxValue = 0;
|
||||
ref = this._swatches;
|
||||
for (j = 0, len = ref.length; j < len; j++) {
|
||||
swatch = ref[j];
|
||||
sat = swatch.getHsl()[1];
|
||||
luma = swatch.getHsl()[2];
|
||||
if (sat >= minSaturation && sat <= maxSaturation && luma >= minLuma && luma <= maxLuma && !this.isAlreadySelected(swatch)) {
|
||||
value = this.createComparisonValue(sat, targetSaturation, luma, targetLuma, swatch.getPopulation(), this.HighestPopulation);
|
||||
if (max === void 0 || value > maxValue) {
|
||||
max = swatch;
|
||||
maxValue = value;
|
||||
}
|
||||
}
|
||||
}
|
||||
return max;
|
||||
};
|
||||
CanvasImage.prototype.getImageData = function () {
|
||||
return this.context.getImageData(0, 0, this.width, this.height);
|
||||
};
|
||||
|
||||
Vibrant.prototype.createComparisonValue = function(saturation, targetSaturation, luma, targetLuma, population, maxPopulation) {
|
||||
return this.weightedMean(this.invertDiff(saturation, targetSaturation), this.WEIGHT_SATURATION, this.invertDiff(luma, targetLuma), this.WEIGHT_LUMA, population / maxPopulation, this.WEIGHT_POPULATION);
|
||||
};
|
||||
CanvasImage.prototype.removeCanvas = function () {
|
||||
this.context = null;
|
||||
this.canvas = null;
|
||||
};
|
||||
|
||||
Vibrant.prototype.invertDiff = function(value, targetValue) {
|
||||
return 1 - Math.abs(value - targetValue);
|
||||
};
|
||||
return CanvasImage;
|
||||
|
||||
Vibrant.prototype.weightedMean = function() {
|
||||
var i, sum, sumWeight, value, values, weight;
|
||||
values = 1 <= arguments.length ? slice.call(arguments, 0) : [];
|
||||
sum = 0;
|
||||
sumWeight = 0;
|
||||
i = 0;
|
||||
while (i < values.length) {
|
||||
value = values[i];
|
||||
weight = values[i + 1];
|
||||
sum += value * weight;
|
||||
sumWeight += weight;
|
||||
i += 2;
|
||||
}
|
||||
return sum / sumWeight;
|
||||
};
|
||||
|
||||
Vibrant.prototype.swatches = function() {
|
||||
return {
|
||||
Vibrant: this.VibrantSwatch,
|
||||
Muted: this.MutedSwatch,
|
||||
DarkVibrant: this.DarkVibrantSwatch,
|
||||
DarkMuted: this.DarkMutedSwatch,
|
||||
LightVibrant: this.LightVibrantSwatch,
|
||||
LightMuted: this.LightMuted
|
||||
};
|
||||
};
|
||||
|
||||
Vibrant.prototype.isAlreadySelected = function(swatch) {
|
||||
return this.VibrantSwatch === swatch || this.DarkVibrantSwatch === swatch || this.LightVibrantSwatch === swatch || this.MutedSwatch === swatch || this.DarkMutedSwatch === swatch || this.LightMutedSwatch === swatch;
|
||||
};
|
||||
|
||||
Vibrant.rgbToHsl = function(r, g, b) {
|
||||
var d, h, l, max, min, s;
|
||||
r /= 255;
|
||||
g /= 255;
|
||||
b /= 255;
|
||||
max = Math.max(r, g, b);
|
||||
min = Math.min(r, g, b);
|
||||
h = void 0;
|
||||
s = void 0;
|
||||
l = (max + min) / 2;
|
||||
if (max === min) {
|
||||
h = s = 0;
|
||||
} else {
|
||||
d = max - min;
|
||||
s = l > 0.5 ? d / (2 - max - min) : d / (max + min);
|
||||
switch (max) {
|
||||
case r:
|
||||
h = (g - b) / d + (g < b ? 6 : 0);
|
||||
break;
|
||||
case g:
|
||||
h = (b - r) / d + 2;
|
||||
break;
|
||||
case b:
|
||||
h = (r - g) / d + 4;
|
||||
}
|
||||
h /= 6;
|
||||
}
|
||||
return [h, s, l];
|
||||
};
|
||||
|
||||
Vibrant.hslToRgb = function(h, s, l) {
|
||||
var b, g, hue2rgb, p, q, r;
|
||||
r = void 0;
|
||||
g = void 0;
|
||||
b = void 0;
|
||||
hue2rgb = function(p, q, t) {
|
||||
if (t < 0) {
|
||||
t += 1;
|
||||
}
|
||||
if (t > 1) {
|
||||
t -= 1;
|
||||
}
|
||||
if (t < 1 / 6) {
|
||||
return p + (q - p) * 6 * t;
|
||||
}
|
||||
if (t < 1 / 2) {
|
||||
return q;
|
||||
}
|
||||
if (t < 2 / 3) {
|
||||
return p + (q - p) * (2 / 3 - t) * 6;
|
||||
}
|
||||
return p;
|
||||
};
|
||||
if (s === 0) {
|
||||
r = g = b = l;
|
||||
} else {
|
||||
q = l < 0.5 ? l * (1 + s) : l + s - (l * s);
|
||||
p = 2 * l - q;
|
||||
r = hue2rgb(p, q, h + 1 / 3);
|
||||
g = hue2rgb(p, q, h);
|
||||
b = hue2rgb(p, q, h - (1 / 3));
|
||||
}
|
||||
return [r * 255, g * 255, b * 255];
|
||||
};
|
||||
|
||||
return Vibrant;
|
||||
|
||||
})();
|
||||
|
||||
|
||||
/*
|
||||
CanvasImage Class
|
||||
Class that wraps the html image element and canvas.
|
||||
It also simplifies some of the canvas context manipulation
|
||||
with a set of helper functions.
|
||||
Stolen from https://github.com/lokesh/color-thief
|
||||
*/
|
||||
|
||||
window.CanvasImage = CanvasImage = (function() {
|
||||
function CanvasImage(image) {
|
||||
|
||||
this.canvas = document.createElement('canvas');
|
||||
|
||||
this.context = this.canvas.getContext('2d');
|
||||
|
||||
var originalWidth = image.width;
|
||||
var originalHeight = image.height;
|
||||
|
||||
var maxArea = 300 * 300;
|
||||
var bitmapArea = originalWidth * originalHeight;
|
||||
var scaleRatio = 1;
|
||||
if (bitmapArea > maxArea) {
|
||||
scaleRatio = maxArea / bitmapArea;
|
||||
}
|
||||
|
||||
//console.log(scaleRatio);
|
||||
|
||||
this.width = this.canvas.width = originalWidth * scaleRatio;
|
||||
this.height = this.canvas.height = originalHeight * scaleRatio;
|
||||
|
||||
this.context.drawImage(image, 0, 0, originalWidth, originalHeight, 0, 0, this.width, this.height);
|
||||
}
|
||||
|
||||
CanvasImage.prototype.getPixelCount = function() {
|
||||
return this.width * this.height;
|
||||
};
|
||||
|
||||
CanvasImage.prototype.getImageData = function () {
|
||||
return this.context.getImageData(0, 0, this.width, this.height);
|
||||
};
|
||||
|
||||
CanvasImage.prototype.removeCanvas = function() {
|
||||
this.context = null;
|
||||
this.canvas = null;
|
||||
};
|
||||
|
||||
return CanvasImage;
|
||||
|
||||
})();
|
||||
|
||||
}).call(this);
|
||||
})();
|
||||
|
||||
},{"quantize":1}]},{},[2]);
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue