Export isSlimSkin function

src/skinview3d.js

@@ -1,6 +1,18 @@
-export { SkinObject, CapeObject, PlayerObject } from "./model";
-export { SkinViewer } from "./viewer";
-export { OrbitControls, createOrbitControls } from "./orbit_controls";
+export {
+	SkinObject,
+	CapeObject,
+	PlayerObject
+} from "./model";
+
+export {
+	SkinViewer
+} from "./viewer";
+
+export {
+	OrbitControls,
+	createOrbitControls
+} from "./orbit_controls";
+
 export {
 	invokeAnimation,
 	CompositeAnimation,
@@ -8,3 +20,7 @@ export {
 	RunningAnimation,
 	RotatingAnimation
 } from "./animation";
+
+export {
+	isSlimSkin
+} from "./utils";

src/utils.js

@@ -115,7 +115,7 @@ function loadCapeToCanvas(canvas, image) {
 	context.drawImage(image, 0, 0, image.width, image.height);
 }
 
-function isSlimSkin(canvas) {
+function isSlimSkin(canvasOrImage) {
 	// Detects whether the skin is default or slim.
 	//
 	// The right arm area of *default* skins:
@@ -157,13 +157,23 @@ function isSlimSkin(canvas) {
 	// If there is a transparent pixel in any of the 4 unused areas, the skin must be slim,
 	// as transparent pixels are not allowed in the first layer.
 
-	let scale = computeSkinScale(canvas.width);
-	let context = canvas.getContext("2d");
-	let checkArea = (x, y, w, h) => hasTransparency(context, x * scale, y * scale, w * scale, h * scale);
-	return checkArea(50, 16, 2, 4) ||
-		checkArea(54, 20, 2, 12) ||
-		checkArea(42, 48, 2, 4) ||
-		checkArea(46, 52, 2, 12);
+	if (canvasOrImage instanceof HTMLCanvasElement) {
+		let canvas = canvasOrImage;
+		let scale = computeSkinScale(canvas.width);
+		let context = canvas.getContext("2d");
+		let checkArea = (x, y, w, h) => hasTransparency(context, x * scale, y * scale, w * scale, h * scale);
+		return checkArea(50, 16, 2, 4) ||
+			checkArea(54, 20, 2, 12) ||
+			checkArea(42, 48, 2, 4) ||
+			checkArea(46, 52, 2, 12);
+	} else if (canvasOrImage instanceof HTMLImageElement) {
+		let image = canvasOrImage;
+		let canvas = document.createElement("canvas");
+		loadSkinToCanvas(canvas, image);
+		return isSlimSkin(canvas);
+	} else {
+		throw `Illegal argument: ${canvasOrImage}`;
+	}
 }
 
 export { isSlimSkin, loadSkinToCanvas, loadCapeToCanvas };

types/skinview3d.d.ts

@@ -2,3 +2,4 @@ export * from "./model";
 export * from "./animation";
 export * from "./viewer";
 export * from "./orbit_controls";
+export * from "./utils";

types/utils.d.ts

@@ -0,0 +1 @@
+export function isSlimSkin(skinImage: HTMLImageElement): boolean;