47 lines
6.1 KiB
JavaScript
47 lines
6.1 KiB
JavaScript
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"use strict";
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var __importDefault = (this && this.__importDefault) || function (mod) {
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return (mod && mod.__esModule) ? mod : { "default": mod };
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.writePng = exports.readPngFile = exports.readPng = exports.sendMessageToChildProcess = exports.exec = exports.deleteFile = exports.readFile = exports.writeFile = exports.stat = exports.readDir = void 0;
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const child_process_1 = __importDefault(require("child_process"));
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const graceful_fs_1 = __importDefault(require("graceful-fs"));
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const pngjs_1 = require("pngjs");
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const promisify_event_1 = __importDefault(require("promisify-event"));
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const util_1 = require("util");
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exports.readDir = (0, util_1.promisify)(graceful_fs_1.default.readdir);
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exports.stat = (0, util_1.promisify)(graceful_fs_1.default.stat);
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exports.writeFile = (0, util_1.promisify)(graceful_fs_1.default.writeFile);
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exports.readFile = (0, util_1.promisify)(graceful_fs_1.default.readFile);
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exports.deleteFile = (0, util_1.promisify)(graceful_fs_1.default.unlink);
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exports.exec = (0, util_1.promisify)(child_process_1.default.exec);
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exports.sendMessageToChildProcess = (0, util_1.promisify)((process, ...args) => process.send(...args));
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function readPng(buffer) {
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const png = new pngjs_1.PNG();
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const parsedPromise = Promise.race([
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(0, promisify_event_1.default)(png, 'parsed'),
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(0, promisify_event_1.default)(png, 'error'),
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]);
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png.parse(buffer);
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return parsedPromise
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.then(() => png);
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}
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exports.readPng = readPng;
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async function readPngFile(filePath) {
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const buffer = await (0, exports.readFile)(filePath);
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return await readPng(buffer);
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}
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exports.readPngFile = readPngFile;
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function writePng(filePath, png) {
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const outStream = graceful_fs_1.default.createWriteStream(filePath);
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const pngStream = png.pack();
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const finishPromise = Promise.race([
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(0, promisify_event_1.default)(outStream, 'finish'),
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(0, promisify_event_1.default)(outStream, 'error'),
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(0, promisify_event_1.default)(pngStream, 'error'),
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]);
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pngStream.pipe(outStream);
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return finishPromise;
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}
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exports.writePng = writePng;
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