@loaders.gl/images/dist/lib/parsers/parse-to-image-bitmap.js

Framework-independent loaders and writers for images (PNG, JPG, ...)

import { isSVG, getBlob } from "./svg-utils.js";
import { parseToImage } from "./parse-to-image.js";
let imagebitmapOptionsSupported = true;
/**
 * Asynchronously parses an array buffer into an ImageBitmap - this contains the decoded data
 * ImageBitmaps are supported on worker threads, but not supported on Edge, IE11 and Safari
 * https://developer.mozilla.org/en-US/docs/Web/API/ImageBitmap#Browser_compatibility
 *
 * TODO - createImageBitmap supports source rect (5 param overload), pass through?
 */
export async function parseToImageBitmap(arrayBuffer, options, url) {
    let blob;
    // Cannot parse SVG directly to ImageBitmap, parse to Image first
    if (isSVG(url)) {
        // Note: this only works on main thread
        const image = await parseToImage(arrayBuffer, options, url);
        blob = image;
    }
    else {
        // Create blob from the array buffer
        blob = getBlob(arrayBuffer, url);
    }
    const imagebitmapOptions = (options && options.imagebitmap);
    return await safeCreateImageBitmap(blob, imagebitmapOptions);
}
/**
 * Safely creates an imageBitmap with options
 * *
 * Firefox crashes if imagebitmapOptions is supplied
 * Avoid supplying if not provided or supported, remember if not supported
 */
async function safeCreateImageBitmap(blob, imagebitmapOptions = null) {
    if (isEmptyObject(imagebitmapOptions) || !imagebitmapOptionsSupported) {
        imagebitmapOptions = null;
    }
    if (imagebitmapOptions) {
        try {
            // @ts-ignore Options
            return await createImageBitmap(blob, imagebitmapOptions);
        }
        catch (error) {
            console.warn(error); // eslint-disable-line
            imagebitmapOptionsSupported = false;
        }
    }
    return await createImageBitmap(blob);
}
function isEmptyObject(object) {
    if (!object) {
        return true;
    }
    for (const key in object) {
        if (Object.prototype.hasOwnProperty.call(object, key)) {
            return false;
        }
    }
    return true;
}
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