@woosh/meep-engine/src/engine/graphics/canvas/computeImageCanvasEquality.js

Pure JavaScript game engine. Fully featured and production ready.

import html_canvas_to_sampler2d from "../texture/html_canvas_to_sampler2d.js";


/**
 *
 * @param {HTMLCanvasElement} a
 * @param {HTMLCanvasElement} b
 * @returns {boolean}
 */
export function computeImageCanvasEquality(a, b) {
    if(a === b){
        // shortcut
        return true;
    }

    if (
        a.width !== b.width
        || a.height !== b.height
    ) {
        return false;
    }

    const sampler_a = html_canvas_to_sampler2d(a);
    const sampler_b = html_canvas_to_sampler2d(b);

    if(!sampler_a.equals(sampler_b)){
        return  false;
    }

    return true;
}