@jbrowse/core/esm/util/transferables.js

JBrowse 2 core libraries used by plugins

export function isDetachedBuffer(buffer) {
    return buffer.byteLength === 0;
}
function isImageBitmap(value) {
    return typeof ImageBitmap !== 'undefined' && value instanceof ImageBitmap;
}
function isArrayBufferLike(value) {
    return (value !== null &&
        typeof value === 'object' &&
        typeof value.byteLength === 'number');
}
export function collectTransferables(result) {
    const transferables = [];
    const { imageData, flatbush, subfeatureFlatbush } = result;
    if (isImageBitmap(imageData)) {
        transferables.push(imageData);
    }
    if (isArrayBufferLike(flatbush)) {
        if (isDetachedBuffer(flatbush)) {
            console.warn('flatbush buffer is already detached, cannot transfer');
        }
        else {
            transferables.push(flatbush);
        }
    }
    if (isArrayBufferLike(subfeatureFlatbush)) {
        if (isDetachedBuffer(subfeatureFlatbush)) {
            console.warn('subfeatureFlatbush buffer is already detached, cannot transfer');
        }
        else {
            transferables.push(subfeatureFlatbush);
        }
    }
    return transferables;
}