lightningimg/lightningimg-wasm/pkg-node/lightningimg_wasm.js

A blazing fast, transparent, and safe image converter powered by WebAssembly. Convert PNG, JPG, TIFF, and GIF images to optimized WebP format with high performance and cross-platform compatibility.

let imports = {};
imports['__wbindgen_placeholder__'] = module.exports;
let wasm;
const { TextDecoder, TextEncoder } = require(`util`);

let cachedTextDecoder = new TextDecoder('utf-8', { ignoreBOM: true, fatal: true });

cachedTextDecoder.decode();

let cachedUint8ArrayMemory0 = null;

function getUint8ArrayMemory0() {
    if (cachedUint8ArrayMemory0 === null || cachedUint8ArrayMemory0.byteLength === 0) {
        cachedUint8ArrayMemory0 = new Uint8Array(wasm.memory.buffer);
    }
    return cachedUint8ArrayMemory0;
}

function getStringFromWasm0(ptr, len) {
    ptr = ptr >>> 0;
    return cachedTextDecoder.decode(getUint8ArrayMemory0().subarray(ptr, ptr + len));
}

const heap = new Array(128).fill(undefined);

heap.push(undefined, null, true, false);

let heap_next = heap.length;

function addHeapObject(obj) {
    if (heap_next === heap.length) heap.push(heap.length + 1);
    const idx = heap_next;
    heap_next = heap[idx];

    heap[idx] = obj;
    return idx;
}

function getObject(idx) { return heap[idx]; }

function handleError(f, args) {
    try {
        return f.apply(this, args);
    } catch (e) {
        wasm.__wbindgen_export_1(addHeapObject(e));
    }
}

let WASM_VECTOR_LEN = 0;

let cachedTextEncoder = new TextEncoder('utf-8');

const encodeString = (typeof cachedTextEncoder.encodeInto === 'function'
    ? function (arg, view) {
    return cachedTextEncoder.encodeInto(arg, view);
}
    : function (arg, view) {
    const buf = cachedTextEncoder.encode(arg);
    view.set(buf);
    return {
        read: arg.length,
        written: buf.length
    };
});

function passStringToWasm0(arg, malloc, realloc) {

    if (realloc === undefined) {
        const buf = cachedTextEncoder.encode(arg);
        const ptr = malloc(buf.length, 1) >>> 0;
        getUint8ArrayMemory0().subarray(ptr, ptr + buf.length).set(buf);
        WASM_VECTOR_LEN = buf.length;
        return ptr;
    }

    let len = arg.length;
    let ptr = malloc(len, 1) >>> 0;

    const mem = getUint8ArrayMemory0();

    let offset = 0;

    for (; offset < len; offset++) {
        const code = arg.charCodeAt(offset);
        if (code > 0x7F) break;
        mem[ptr + offset] = code;
    }

    if (offset !== len) {
        if (offset !== 0) {
            arg = arg.slice(offset);
        }
        ptr = realloc(ptr, len, len = offset + arg.length * 3, 1) >>> 0;
        const view = getUint8ArrayMemory0().subarray(ptr + offset, ptr + len);
        const ret = encodeString(arg, view);

        offset += ret.written;
        ptr = realloc(ptr, len, offset, 1) >>> 0;
    }

    WASM_VECTOR_LEN = offset;
    return ptr;
}

let cachedDataViewMemory0 = null;

function getDataViewMemory0() {
    if (cachedDataViewMemory0 === null || cachedDataViewMemory0.buffer.detached === true || (cachedDataViewMemory0.buffer.detached === undefined && cachedDataViewMemory0.buffer !== wasm.memory.buffer)) {
        cachedDataViewMemory0 = new DataView(wasm.memory.buffer);
    }
    return cachedDataViewMemory0;
}

function dropObject(idx) {
    if (idx < 132) return;
    heap[idx] = heap_next;
    heap_next = idx;
}

function takeObject(idx) {
    const ret = getObject(idx);
    dropObject(idx);
    return ret;
}

module.exports.init_panic_hook = function() {
    wasm.init_panic_hook();
};

function passArray8ToWasm0(arg, malloc) {
    const ptr = malloc(arg.length * 1, 1) >>> 0;
    getUint8ArrayMemory0().set(arg, ptr / 1);
    WASM_VECTOR_LEN = arg.length;
    return ptr;
}

function isLikeNone(x) {
    return x === undefined || x === null;
}

function getArrayU8FromWasm0(ptr, len) {
    ptr = ptr >>> 0;
    return getUint8ArrayMemory0().subarray(ptr / 1, ptr / 1 + len);
}
/**
 * Converts an image buffer to WebP format.
 * This is the core function that browsers and Node.js can use.
 * @param {Uint8Array} input_buffer
 * @param {number | undefined} [width]
 * @param {number | undefined} [height]
 * @returns {Uint8Array}
 */
module.exports.convert_image_buffer = function(input_buffer, width, height) {
    try {
        const retptr = wasm.__wbindgen_add_to_stack_pointer(-16);
        const ptr0 = passArray8ToWasm0(input_buffer, wasm.__wbindgen_export_2);
        const len0 = WASM_VECTOR_LEN;
        wasm.convert_image_buffer(retptr, ptr0, len0, isLikeNone(width) ? 0x100000001 : (width) >>> 0, isLikeNone(height) ? 0x100000001 : (height) >>> 0);
        var r0 = getDataViewMemory0().getInt32(retptr + 4 * 0, true);
        var r1 = getDataViewMemory0().getInt32(retptr + 4 * 1, true);
        var r2 = getDataViewMemory0().getInt32(retptr + 4 * 2, true);
        var r3 = getDataViewMemory0().getInt32(retptr + 4 * 3, true);
        if (r3) {
            throw takeObject(r2);
        }
        var v2 = getArrayU8FromWasm0(r0, r1).slice();
        wasm.__wbindgen_export_0(r0, r1 * 1, 1);
        return v2;
    } finally {
        wasm.__wbindgen_add_to_stack_pointer(16);
    }
};

/**
 * Determines if an image format is supported based on the first few bytes.
 * @param {Uint8Array} buffer
 * @returns {boolean}
 */
module.exports.is_supported_format = function(buffer) {
    const ptr0 = passArray8ToWasm0(buffer, wasm.__wbindgen_export_2);
    const len0 = WASM_VECTOR_LEN;
    const ret = wasm.is_supported_format(ptr0, len0);
    return ret !== 0;
};

/**
 * Get image format information from buffer
 * @param {Uint8Array} buffer
 * @returns {any}
 */
module.exports.get_image_info = function(buffer) {
    try {
        const retptr = wasm.__wbindgen_add_to_stack_pointer(-16);
        const ptr0 = passArray8ToWasm0(buffer, wasm.__wbindgen_export_2);
        const len0 = WASM_VECTOR_LEN;
        wasm.get_image_info(retptr, ptr0, len0);
        var r0 = getDataViewMemory0().getInt32(retptr + 4 * 0, true);
        var r1 = getDataViewMemory0().getInt32(retptr + 4 * 1, true);
        var r2 = getDataViewMemory0().getInt32(retptr + 4 * 2, true);
        if (r2) {
            throw takeObject(r1);
        }
        return takeObject(r0);
    } finally {
        wasm.__wbindgen_add_to_stack_pointer(16);
    }
};

/**
 * Processes all images in a directory recursively, converting them to WebP format.
 * This function is designed to work in Node.js environments where fs module is available.
 * @param {string} _input_dir
 * @param {string | undefined} [_output_dir]
 */
module.exports.process_directory = function(_input_dir, _output_dir) {
    try {
        const retptr = wasm.__wbindgen_add_to_stack_pointer(-16);
        const ptr0 = passStringToWasm0(_input_dir, wasm.__wbindgen_export_2, wasm.__wbindgen_export_3);
        const len0 = WASM_VECTOR_LEN;
        var ptr1 = isLikeNone(_output_dir) ? 0 : passStringToWasm0(_output_dir, wasm.__wbindgen_export_2, wasm.__wbindgen_export_3);
        var len1 = WASM_VECTOR_LEN;
        wasm.process_directory(retptr, ptr0, len0, ptr1, len1);
        var r0 = getDataViewMemory0().getInt32(retptr + 4 * 0, true);
        var r1 = getDataViewMemory0().getInt32(retptr + 4 * 1, true);
        if (r1) {
            throw takeObject(r0);
        }
    } finally {
        wasm.__wbindgen_add_to_stack_pointer(16);
    }
};

/**
 * Processes all images in a directory recursively, converting them to WebP format and optionally keeping original file names.
 * @param {string} _input_dir
 * @param {boolean | undefined} [_keep_original_names]
 */
module.exports.process_directory_destructive = function(_input_dir, _keep_original_names) {
    try {
        const retptr = wasm.__wbindgen_add_to_stack_pointer(-16);
        const ptr0 = passStringToWasm0(_input_dir, wasm.__wbindgen_export_2, wasm.__wbindgen_export_3);
        const len0 = WASM_VECTOR_LEN;
        wasm.process_directory_destructive(retptr, ptr0, len0, isLikeNone(_keep_original_names) ? 0xFFFFFF : _keep_original_names ? 1 : 0);
        var r0 = getDataViewMemory0().getInt32(retptr + 4 * 0, true);
        var r1 = getDataViewMemory0().getInt32(retptr + 4 * 1, true);
        if (r1) {
            throw takeObject(r0);
        }
    } finally {
        wasm.__wbindgen_add_to_stack_pointer(16);
    }
};

module.exports.__wbg_error_7534b8e9a36f1ab4 = function(arg0, arg1) {
    let deferred0_0;
    let deferred0_1;
    try {
        deferred0_0 = arg0;
        deferred0_1 = arg1;
        console.error(getStringFromWasm0(arg0, arg1));
    } finally {
        wasm.__wbindgen_export_0(deferred0_0, deferred0_1, 1);
    }
};

module.exports.__wbg_new_688846f374351c92 = function() {
    const ret = new Object();
    return addHeapObject(ret);
};

module.exports.__wbg_new_8a6f238a6ece86ea = function() {
    const ret = new Error();
    return addHeapObject(ret);
};

module.exports.__wbg_set_4e647025551483bd = function() { return handleError(function (arg0, arg1, arg2) {
    const ret = Reflect.set(getObject(arg0), getObject(arg1), getObject(arg2));
    return ret;
}, arguments) };

module.exports.__wbg_stack_0ed75d68575b0f3c = function(arg0, arg1) {
    const ret = getObject(arg1).stack;
    const ptr1 = passStringToWasm0(ret, wasm.__wbindgen_export_2, wasm.__wbindgen_export_3);
    const len1 = WASM_VECTOR_LEN;
    getDataViewMemory0().setInt32(arg0 + 4 * 1, len1, true);
    getDataViewMemory0().setInt32(arg0 + 4 * 0, ptr1, true);
};

module.exports.__wbindgen_number_new = function(arg0) {
    const ret = arg0;
    return addHeapObject(ret);
};

module.exports.__wbindgen_object_drop_ref = function(arg0) {
    takeObject(arg0);
};

module.exports.__wbindgen_string_new = function(arg0, arg1) {
    const ret = getStringFromWasm0(arg0, arg1);
    return addHeapObject(ret);
};

module.exports.__wbindgen_throw = function(arg0, arg1) {
    throw new Error(getStringFromWasm0(arg0, arg1));
};

const path = require('path').join(__dirname, 'lightningimg_wasm_bg.wasm');
const bytes = require('fs').readFileSync(path);

const wasmModule = new WebAssembly.Module(bytes);
const wasmInstance = new WebAssembly.Instance(wasmModule, imports);
wasm = wasmInstance.exports;
module.exports.__wasm = wasm;