89 lines
2.3 KiB
TypeScript
89 lines
2.3 KiB
TypeScript
import { type SpriteSpec, SPRITE_SPECS } from ".";
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import { SOUND_SPECS, SoundSpec } from "./sounds";
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export const FONT = new FontFace("scientifica", "url(/fonts/scientifica.ttf)");
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FONT.load().then((font) => {
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document.fonts.add(font);
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});
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export const IMAGES = new Map<string, HTMLImageElement>();
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export const SOUNDS = new Map<string, HTMLAudioElement>();
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export const loadSpritesIntoImageElements = (
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spriteSpecs: Partial<SpriteSpec>[],
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): Promise<void>[] => {
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const spritePromises: Promise<void>[] = [];
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for (const spriteSpec of spriteSpecs) {
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if (spriteSpec.sheet) {
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const img = new Image();
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img.src = spriteSpec.sheet;
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IMAGES.set(spriteSpec.sheet, img);
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spritePromises.push(
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new Promise((resolve) => {
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img.onload = () => resolve();
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}),
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);
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}
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if (spriteSpec.states) {
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spritePromises.push(
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...loadSpritesIntoImageElements(Array.from(spriteSpec.states.values())),
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);
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}
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}
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return spritePromises;
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};
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export const loadSoundsIntoAudioElements = (
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soundSpecs: SoundSpec[],
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): Promise<void>[] => {
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const soundPromises: Promise<void>[] = [];
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for (const soundSpec of soundSpecs) {
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if (soundSpec.url) {
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const promise = fetch(soundSpec.url)
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.then((response) => response.blob())
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.then((blob) => {
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const audio = new Audio();
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audio.src = URL.createObjectURL(blob);
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audio.volume = soundSpec.volume ?? 1;
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SOUNDS.set(soundSpec.name, audio);
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return new Promise<void>((resolve, rej) => {
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audio.oncanplaythrough = () => {
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resolve();
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};
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audio.onerror = (e) => {
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console.error(soundSpec);
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rej(e);
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};
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});
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});
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soundPromises.push(promise);
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}
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if (soundSpec.states) {
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soundPromises.push(
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...loadSoundsIntoAudioElements(Array.from(soundSpec.states.values())),
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);
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}
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}
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return soundPromises;
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};
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export const loadAssets = () =>
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Promise.all([
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...loadSpritesIntoImageElements(
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Array.from(SPRITE_SPECS.keys()).map(
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(key) => SPRITE_SPECS.get(key) as SpriteSpec,
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),
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),
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FONT.load(),
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...loadSoundsIntoAudioElements(Array.from(SOUND_SPECS.values())),
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]);
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