janishutz/color-thief
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Support CanvasElements as inputs

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Admin
2025-02-06 18:23:02 +01:00
parent e01b849ea4
commit 5da138d090
1 changed files with 11 additions and 11 deletions
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22
src/color-thief.ts
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@@ -34,15 +34,15 @@ class CanvasImage {
height: number;
constructor ( image?: HTMLImageElement, canvas?: HTMLCanvasElement ) {
if ( image ) {
constructor ( image: HTMLImageElement | HTMLCanvasElement ) {
if ( image instanceof HTMLImageElement ) {
this.canvas = document.createElement( 'canvas' );
this.context = this.canvas.getContext( '2d' );
this.width = this.canvas.width = image.naturalWidth;
this.height = this.canvas.height = image.naturalHeight;
this.context.drawImage( image, 0, 0, this.width, this.height );
} else if ( canvas ) {
this.canvas = canvas;
} else if ( image instanceof HTMLCanvasElement ) {
this.canvas = image;
this.context = this.canvas.getContext( '2d' );
this.width = this.canvas.width;
this.height = this.canvas.height;
@@ -70,14 +70,14 @@ class ColorThief {
/**
* Use the median cut algorithm provided by quantize.js to cluster similar
* colors and return the base color from the largest cluster.
* @param {HTMLImageElement} sourceImage:HTMLImageElement
* @param {HTMLImageElement | HTMLCanvasElement} sourceImage The source image or canvas element
* @param {number?} quality (Optional) 1 = highest quality, 10 = default. The bigger the number, the
* faster a color will be returned but the greater the likelihood that it will not be the visually
* most dominant color.
* @returns {ColorThiefResult} returns {r: num, g: num, b: num}
*/
getColor (
sourceImage: HTMLImageElement,
sourceImage: HTMLImageElement | HTMLCanvasElement,
quality: number = 10,
): ColorThiefResult {
const palette = this.getPalette( sourceImage, 5, quality );
@@ -86,7 +86,7 @@ class ColorThief {
/**
* Use the median cut algorithm provided by quantize.js to cluster similar colors.
* @param {HTMLImageElement} sourceImage The image you want to have processed, as an HTMLImageElement
* @param {HTMLImageElement | HTMLCanvasElement} sourceImage The image you want to have processed, as an HTMLImageElement or HTMLCanvasElement
* @param {number?} colorCount colorCount determines the size of the palette; the number of colors returned. If not set, it
* defaults to 10.
* @param {number?} quality (Optional) 1 = highest quality, 10 = default. The bigger the number, the
@@ -95,7 +95,7 @@ class ColorThief {
* @returns {ColorThiefResult[] | null} returns array[ {r: num, g: num, b: num}, {r: num, g: num, b: num}, ...]
*/
getPalette (
sourceImage: HTMLImageElement,
sourceImage: HTMLImageElement | HTMLCanvasElement,
colorCount?: number,
quality: number = 10,
): ColorThiefResult[] | null {
@@ -202,7 +202,7 @@ class ColorThief {
* @returns {void}
* @deprecated since Version 3.0, in favour of getColorPromise. Only retained for compatibility
*/
getColorAsync = ( imageUrl: string, callback: ( data: ColorThiefResult, img: HTMLImageElement ) => void, quality: number | null ): void => {
getColorAsync ( imageUrl: string, callback: ( data: ColorThiefResult, img: HTMLImageElement ) => void, quality: number | null ): void {
// eslint-disable-next-line @typescript-eslint/no-this-alias
const thief = this;
this.getImageDataFromURL( imageUrl ).then( ( imageData ) => {
@@ -216,14 +216,14 @@ class ColorThief {
};
/**
* Same as getColor, but promise-based
* Get the dominant color of an image from an image URL promise-based. Replaces getColorFromUrl
* @param {string} imageUrl
* @param {number?} quality (Optional) 1 = highest quality, 10 = default. The bigger the number, the
* faster a color will be returned but the greater the likelihood that it will not be the visually
* most dominant color.
* @returns {Promise<{ 'color': ColorThiefResult, 'img': HTMLImageElement }>} Returns a promise resolving to an object containing the color and the image element
*/
getColorPromise = ( imageUrl: string, quality: number | null ): Promise<{ 'color': ColorThiefResult, 'img': HTMLImageElement }> => {
getColorFromURLPromise ( imageUrl: string, quality: number | null ): Promise<{ 'color': ColorThiefResult, 'img': HTMLImageElement }> {
return new Promise( ( resolve, reject ) => {
// eslint-disable-next-line @typescript-eslint/no-this-alias
const thief = this;