heic-decode - npm Package Compare versions

Comparing version 1.1.2 to 2.0.0

lib.js

index.js

		@@ -1,70 +0,6 @@
		const libheif = require('libheif-js');
		const libheif = require('libheif-js/wasm-bundle');

		const uint8ArrayUtf8ByteString = (array, start, end) => {
		return String.fromCharCode(...array.slice(start, end));
		};
		const { one, all } = require('./lib.js')(libheif);

		// brands explained: https://github.com/strukturag/libheif/issues/83
		// code adapted from: https://github.com/sindresorhus/file-type/blob/6f901bd82b849a85ca4ddba9c9a4baacece63d31/core.js#L428-L438
		const isHeic = (buffer) => {
		const brandMajor = uint8ArrayUtf8ByteString(buffer, 8, 12).replace('\0', ' ').trim();

		switch (brandMajor) {
		case 'mif1':
		return true; // {ext: 'heic', mime: 'image/heif'};
		case 'msf1':
		return true; // {ext: 'heic', mime: 'image/heif-sequence'};
		case 'heic':
		case 'heix':
		return true; // {ext: 'heic', mime: 'image/heic'};
		case 'hevc':
		case 'hevx':
		return true; // {ext: 'heic', mime: 'image/heic-sequence'};
		}

		return false;
		};

		const decodeImage = async (image) => {
		const width = image.get_width();
		const height = image.get_height();

		const arrayBuffer = await new Promise((resolve, reject) => {
		image.display({ data: new Uint8ClampedArray(widthheight4), width, height }, (displayData) => {
		if (!displayData) {
		return reject(new Error('HEIF processing error'));
		}

		// get the ArrayBuffer from the Uint8Array
		resolve(displayData.data.buffer);
		});
		});

		return { width, height, data: arrayBuffer };
		};

		const decodeBuffer = async ({ buffer, all }) => {
		if (!isHeic(buffer)) {
		throw new TypeError('input buffer is not a HEIC image');
		}

		const decoder = new libheif.HeifDecoder();
		const data = decoder.decode(buffer);

		if (!data.length) {
		throw new Error('HEIF image not found');
		}

		if (!all) {
		return await decodeImage(data[0]);
		}

		return data.map(image => {
		return {
		decode: async () => await decodeImage(image)
		};
		});
		};

		module.exports = async ({ buffer }) => await decodeBuffer({ buffer, all: false });
		module.exports.all = async ({ buffer }) => await decodeBuffer({ buffer, all: true });
		module.exports = one;
		module.exports.all = all;

package.json

		{
		"name": "heic-decode",
		"version": "1.1.2",
		"version": "2.0.0",
		"description": "Decode HEIC images to raw data",
		@@ -28,3 +28,3 @@ "main": "index.js",
		"dependencies": {
		"libheif-js": "^1.10.0"
		"libheif-js": "^1.17.1"
		},
		@@ -31,0 +31,0 @@ "devDependencies": {

README.md

		@@ -35,3 +35,3 @@ # heic-decode
		height, // integer height of the image
		data // ArrayBuffer containing decoded raw image data
		data // Uint8ClampedArray containing pixel data
		} = await decode({ buffer });
		@@ -58,3 +58,3 @@ })();
		height, // integer height of the image
		data // ArrayBuffer containing decoded raw image data
		data // Uint8ClampedArray containing pixel data
		} = await image.decode();
		@@ -65,3 +65,3 @@ }

		You can use this data to integrate with other imaging libraries for processing.
		When the images are decoded, the return value is a plain object in the format of [`ImageData`](https://developer.mozilla.org/en-US/docs/Web/API/ImageData). You can use this object to integrate with other imaging libraries for processing.

		@@ -68,0 +68,0 @@ _Note that while the decoder returns a Promise, it does the majority of the work synchronously, so you should consider using a worker thread in order to not block the main thread in highly concurrent production environments._

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