73 lines
2.8 KiB
JavaScript
73 lines
2.8 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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Object.defineProperty(exports, "getBlurImage", {
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enumerable: true,
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get: function() {
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return getBlurImage;
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}
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});
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const _isanimated = /*#__PURE__*/ _interop_require_default(require("next/dist/compiled/is-animated"));
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const _imageoptimizer = require("../../../../server/image-optimizer");
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function _interop_require_default(obj) {
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return obj && obj.__esModule ? obj : {
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default: obj
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};
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}
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const BLUR_IMG_SIZE = 8;
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const BLUR_QUALITY = 70;
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const VALID_BLUR_EXT = [
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"jpeg",
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"png",
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"webp",
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"avif"
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] // should match other usages
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;
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async function getBlurImage(content, extension, imageSize, { basePath, outputPath, isDev, tracing = ()=>({
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traceFn: (fn)=>(...args)=>fn(...args),
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traceAsyncFn: (fn)=>(...args)=>fn(...args)
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}) }) {
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let blurDataURL;
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let blurWidth = 0;
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let blurHeight = 0;
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if (VALID_BLUR_EXT.includes(extension) && !(0, _isanimated.default)(content)) {
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// Shrink the image's largest dimension
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if (imageSize.width >= imageSize.height) {
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blurWidth = BLUR_IMG_SIZE;
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blurHeight = Math.max(Math.round(imageSize.height / imageSize.width * BLUR_IMG_SIZE), 1);
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} else {
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blurWidth = Math.max(Math.round(imageSize.width / imageSize.height * BLUR_IMG_SIZE), 1);
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blurHeight = BLUR_IMG_SIZE;
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}
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if (isDev) {
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// During `next dev`, we don't want to generate blur placeholders with webpack
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// because it can delay starting the dev server. Instead, we inline a
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// special url to lazily generate the blur placeholder at request time.
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const prefix = "http://localhost";
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const url = new URL(`${basePath || ""}/_next/image`, prefix);
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url.searchParams.set("url", outputPath);
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url.searchParams.set("w", String(blurWidth));
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url.searchParams.set("q", String(BLUR_QUALITY));
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blurDataURL = url.href.slice(prefix.length);
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} else {
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const resizeImageSpan = tracing("image-resize");
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const resizedImage = await resizeImageSpan.traceAsyncFn(()=>(0, _imageoptimizer.optimizeImage)({
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buffer: content,
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width: blurWidth,
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height: blurHeight,
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contentType: `image/${extension}`,
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quality: BLUR_QUALITY
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}));
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const blurDataURLSpan = tracing("image-base64-tostring");
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blurDataURL = blurDataURLSpan.traceFn(()=>`data:image/${extension};base64,${resizedImage.toString("base64")}`);
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}
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}
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return {
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dataURL: blurDataURL,
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width: blurWidth,
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height: blurHeight
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};
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}
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//# sourceMappingURL=blur.js.map
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