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create.js
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create.js
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const {spawn} = require('child_process');
const fs = require('fs-extra');
const path = require('path');
const {StringDecoder} = require('string_decoder');
const util = require('util');
const formidable = require('formidable');
const generateBMFont = require('msdf-bmfont-xml');
const DEFAULT_FONT = fs.readFileSync(`${__dirname}/../fonts/yahei.ttf`);
module.exports = async (req, res) => {
const form = await parseFormBody(req);
const fontID = String(form.fields.name).replace(/[^a-zA-Z0-9-]/g, '');
const charset = String(form.fields.charset);
const textureSize = Number(form.fields.textureSize);
let fontFile = DEFAULT_FONT;
if (!fontID || !charset) {
res.status(400).send('<!DOCTYPE html>Missing or invalid font ID or charset.');
return;
}
if (form.files && form.files.fontFile) {
fontFile = fs.readFileSync(form.files.fontFile.path);
}
try {
const result = await create(fontID, fontFile, charset, textureSize);
res.send({ok: true, ...result});
} catch (e) {
console.error(e);
res.status(500).send({error: 'Sorry, something went wrong.'});
}
};
async function create (fontID, fontFile, charset, textureSize) {
const fontOptions = {
filename: fontID,
outputType: 'json',
charset: charset,
textureSize: [textureSize, textureSize],
pot: true
};
const {json, textures} = await new Promise((resolve, reject) => {
generateBMFont(fontFile, fontOptions, async (e, textures, font) => {
e ? reject(e) : resolve({textures, json: JSON.parse(font.data)});
});
});
const textureData = {};
textures.forEach((texture) => {
const name = path.basename(texture.filename);
textureData[`${name}.png`] = 'data:image/png;base64,' + texture.texture.toString('base64');
});
return {json, textures: textureData};
}
/** Parses multipart/form-data body, which Now 2.0 helpers do not. */
function parseFormBody(req) {
return new Promise(function(resolve, reject) {
new formidable.IncomingForm()
.parse(req, function(err, fields, files) {
err ? reject(err) : resolve({fields, files});
});
});
}