ktx2-encoder/dist/node/NodeBasisEncoder.js

KTX2(.ktx2) encoder for browser applications

import { SourceType } from "../enum.js";
import { applyInputOptions } from "../utils.js";
import BASIS from "../basis/basis_encoder.js";
let promise = null;
class NodeBasisEncoder {
    async init() {
        if (!promise) {
            promise = BASIS().then((basis) => {
                basis.initializeBasis();
                return basis;
            });
        }
        return promise;
    }
    async encode(imageBitmapSource, options = {}) {
        const imageData = await options.imageDecoder(imageBitmapSource);
        const basis = await this.init();
        const basisEncoder = new basis.BasisEncoder();
        const w = imageData.width;
        const h = imageData.height;
        const rgbaPixels = imageData.data;
        basisEncoder.setSliceSourceImage(0, new Uint8Array(rgbaPixels), w, h, SourceType.RAW);
        applyInputOptions(options, basisEncoder);
        const resultData = new Uint8Array(w * h * 4 * 2);
        const resultSize = basisEncoder.encode(resultData);
        if (resultSize === 0) {
            throw "Something wrong";
        }
        return Buffer.from(resultData.subarray(0, resultSize));
    }
}
export const nodeEncoder = new NodeBasisEncoder();