cozy-iiif/dist/level-0/index.js

A developer-friendly collection of abstractions and utilities built on top of @iiif/presentation-3 and @iiif/parser

import { h as e } from "../core-BHFaVC33.js";
import { t } from "../p-throttle-DZE1ty58.js";
//#region src/level-0/fetch-image-info.ts
var n = (t) => ({
	id: e(t, "id"),
	...t
}), r = (e) => fetch(e.serviceUrl).then((e) => e.json()).then(n), i = (() => {
	let e = {
		limit: 5,
		interval: 1e3
	}, n = t(e);
	return {
		getInstance: () => n,
		getConfig: () => ({ ...e }),
		setConfig: (r) => {
			e = {
				...e,
				...r
			}, n = t(e);
		}
	};
})(), a = (e) => {
	if (!e) return;
	let t = i.getConfig();
	(e.limit && e.limit !== t.limit || e.interval && e.interval !== t.interval) && i.setConfig({
		...t,
		...e
	});
}, o = (e) => (e && a({
	limit: e.callsPerSecond || 5,
	interval: 1e3
}), { loadImage: i.getInstance()((e) => new Promise((t, n) => {
	let r = new Image();
	r.crossOrigin = "anonymous", r.onload = () => t(r), r.onerror = n, r.src = e;
})) }), s = (e, t) => {
	let { x: n, y: r, w: i, h: a } = t, o = e.tiles[0].width, s = e.tiles[0].height || e.tiles[0].width;
	return `${e.id}/${n * o},${r * s},${i},${a}/${o},/0/default.jpg`;
}, c = (e, t) => {
	let n = e.tiles[0].width, r = e.tiles[0].height || e.tiles[0].width, i = e.width, a = e.height, o = Math.floor(t.x / n), c = Math.floor(t.y / r), l = Math.ceil((t.x + t.w) / n), u = Math.ceil((t.y + t.h) / r), d = [];
	for (let t = c; t < u; t++) for (let c = o; c < l; c++) {
		if (c * n >= i || t * r >= a) continue;
		let o = Math.min(n, i - c * n), l = Math.min(r, a - t * r);
		d.push({
			x: c,
			y: t,
			width: o,
			height: l,
			url: s(e, {
				x: c,
				y: t,
				w: o,
				h: l
			})
		});
	}
	return d;
}, l = async (e, t) => {
	let n = await r(e), i = c(n, t), a = document.createElement("canvas"), s = a.getContext("2d");
	if (!s) throw Error("Error initializing canvas context");
	let l = n.tiles[0].width, u = n.tiles[0].height || n.tiles[0].width, d = (Math.ceil(t.w / l) + 1) * l, f = (Math.ceil(t.h / u) + 1) * u;
	a.width = d, a.height = f;
	let p = o({ callsPerSecond: 20 });
	await Promise.all(i.map(async (e) => {
		let n = await p.loadImage(e.url), r = e.x * l - t.x, i = e.y * u - t.y;
		s.drawImage(n, r, i);
	}));
	let m = document.createElement("canvas");
	m.width = t.w, m.height = t.h;
	let h = m.getContext("2d");
	if (!h) throw Error("Error initializing canvas context");
	return h.drawImage(a, 0, 0, t.w, t.h, 0, 0, t.w, t.h), new Promise((e, t) => {
		m.toBlob((n) => {
			n ? e(n) : t(/* @__PURE__ */ Error("Failed to create blob"));
		}, "image/jpeg", .95);
	});
}, u = (e, t) => {
	let n = e.tiles[0].scaleFactors.sort((e, t) => t - e);
	if (!t) return n[0];
	let r = t.width ? e.width / t.width : Infinity, i = t.height ? e.height / t.height : Infinity, a = Math.min(r, i);
	for (let e of n) if (e <= a) return e;
	return n[n.length - 1];
}, d = (e, t) => {
	let n = u(e, t), r = Math.ceil(e.width / n), i = Math.ceil(e.height / n);
	if (t) {
		let n = e.width / e.height;
		t.width && r < t.width && (r = t.width, i = Math.ceil(r / n)), t.height && i < t.height && (i = t.height, r = Math.ceil(i * n));
	}
	return {
		width: r,
		height: i
	};
}, f = (e, t) => {
	let n = u(e, t), r = e.tiles[0].width, i = e.tiles[0].height || e.tiles[0].width, a = Math.ceil(e.width / (r * n)), o = Math.ceil(e.height / (i * n)), s = [];
	for (let t = 0; t < o; t++) for (let o = 0; o < a; o++) {
		let a = Math.min(r, (e.width - o * r * n) / n), c = Math.min(i, (e.height - t * i * n) / n);
		a <= 0 || c <= 0 || s.push({
			url: `${e.id}/${o * r * n},${t * i * n},${a * n},${c * n}/${Math.ceil(a)},/0/default.jpg`,
			width: Math.ceil(a),
			height: Math.ceil(c),
			x: o * r,
			y: t * i
		});
	}
	return s;
}, p = async (e, t) => {
	let n = await r(e), i = f(n, t), a = d(n, t), s = document.createElement("canvas");
	s.width = a.width, s.height = a.height;
	let c = s.getContext("2d");
	if (!c) throw Error("Error creating canvas context");
	let l = o();
	return await Promise.all(i.map(async (e) => {
		let t = await l.loadImage(e.url);
		c.drawImage(t, e.x, e.y);
	})), new Promise((e, t) => {
		s.toBlob((n) => {
			n ? e(n) : t(/* @__PURE__ */ Error("Failed to create blob"));
		}, "image/jpeg", .85);
	});
};
//#endregion
export { l as cropRegion, p as getThumbnail };