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3530df7 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 | import parseASCII from "parse-bmfont-ascii";
import parseXML from "parse-bmfont-xml";
import readBinary from "parse-bmfont-binary";
import { BmCharacter, BmKerning, BmFont, BmCommonProps } from "./types.js";
import png from "@jimp/js-png";
import { createJimp } from "@jimp/core";
import path from "path";
import xmlPackage from "simple-xml-to-json";
const { convertXML } = xmlPackage;
export const isWebWorker =
typeof self !== "undefined" && self.document === undefined;
const CharacterJimp = createJimp({ formats: [png] });
const HEADER = Buffer.from([66, 77, 70, 3]);
function isBinary(buf: Buffer | string) {
if (typeof buf === "string") {
return buf.substring(0, 3) === "BMF";
}
const startOfHeader = buf.slice(0, 4);
return (
buf.length > 4 &&
startOfHeader[0] === HEADER[0] &&
startOfHeader[1] === HEADER[1] &&
startOfHeader[2] === HEADER[2]
);
}
export interface LoadedFont {
chars: BmCharacter[];
kernings: BmKerning[];
common: BmCommonProps;
// eslint-disable-next-line @typescript-eslint/no-explicit-any
info: Record<string, any>;
pages: string[];
}
function parseFont(file: string, data: Buffer | string): LoadedFont {
if (isBinary(data)) {
if (typeof data === "string") {
data = Buffer.from(data, "binary");
}
return readBinary(data);
}
data = data.toString().trim();
if (/.json$/.test(file) || data.charAt(0) === "{") {
return JSON.parse(data);
}
if (/.xml$/.test(file) || data.charAt(0) === "<") {
return parseXML(data);
}
return parseASCII(data);
}
// eslint-disable-next-line @typescript-eslint/no-explicit-any
function parseNumbersInObject<T extends Record<string, any>>(obj: T) {
for (const key in obj) {
try {
// eslint-disable-next-line @typescript-eslint/no-explicit-any
(obj as any)[key] = parseInt(obj[key], 10);
} catch {
// do nothing
}
if (typeof obj[key] === "object") {
parseNumbersInObject(obj[key]);
}
}
return obj;
}
/**
*
* @param bufferOrUrl A URL to a file or a buffer
* @returns
*/
export async function loadBitmapFontData(
bufferOrUrl: string | Buffer
): Promise<LoadedFont> {
if (isWebWorker && typeof bufferOrUrl === "string") {
const res = await fetch(bufferOrUrl);
const text = await res.text();
const json = convertXML(text);
const font = json.font.children.reduce(
// eslint-disable-next-line @typescript-eslint/no-explicit-any
(acc: Record<string, any>, i: any) => ({ ...acc, ...i }),
{}
);
const pages: LoadedFont["pages"] = [];
const chars: LoadedFont["chars"] = [];
const kernings: LoadedFont["kernings"] = [];
for (let i = 0; i < font.pages.children.length; i++) {
const p = font.pages.children[i].page;
const id = parseInt(p.id, 10);
pages[id] = parseNumbersInObject(p.file);
}
for (let i = 0; i < font.chars.children.length; i++) {
chars.push(parseNumbersInObject(font.chars.children[i].char));
}
for (let i = 0; i < font.kernings.children.length; i++) {
kernings.push(parseNumbersInObject(font.kernings.children[i].kerning));
}
return {
info: font.info,
common: font.common,
pages,
chars,
kernings,
} satisfies LoadedFont;
} else if (typeof bufferOrUrl === "string") {
const res = await fetch(bufferOrUrl);
const text = await res.text();
return parseFont(bufferOrUrl, text);
} else {
return parseFont("", bufferOrUrl);
}
}
type RawFont = Awaited<ReturnType<typeof loadBitmapFontData>>;
export type ResolveBmFont = Omit<BmFont, "pages"> & Pick<RawFont, "pages">;
export async function processBitmapFont(file: string, font: LoadedFont) {
const chars: Record<string, BmCharacter> = {};
const kernings: Record<string, BmKerning> = {};
for (let i = 0; i < font.chars.length; i++) {
const char = font.chars[i]!;
chars[String.fromCharCode(char.id)] = char;
}
for (let i = 0; i < font.kernings.length; i++) {
const firstString = String.fromCharCode(font.kernings[i]!.first);
kernings[firstString] = kernings[firstString]! || {};
kernings[firstString]![String.fromCharCode(font.kernings[i]!.second)] =
font.kernings[i]!.amount;
}
return {
...font,
chars,
kernings,
pages: await Promise.all(
font.pages.map(async (page) =>
CharacterJimp.read(path.join(path.dirname(file), page))
)
),
};
}
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