bugfix omni layer start index

Author: marcelduin

src/svelte/common/Gallery.svelte

@@ -60,7 +60,6 @@
 
 	const omniFrontIndex:number = omniSettings?.frontIndex ?? 0;
 	const omniNumLayers:number = omniSettings?.layers?.length ?? 1;
-	const omniLayerStart:number = omniSettings?.layerStartIndex ?? 0;
 
 	const startIdxAttr:number|undefined = micrio.hasAttribute('data-gallery-start') ? Number(micrio.getAttribute('data-gallery-start')) : $settings?.omni?.startIndex;
 	let startIdx = startIdxAttr != undefined && !isNaN(startIdxAttr) ? startIdxAttr : startId ? images.findIndex(i => i.id == startId) : 0;

src/ts/wasm.ts

@@ -275,6 +275,9 @@ export class Wasm {
 			|| settings.gallery?.type == 'omni'
 			|| settings.gallery?.type == 'swipe-full');
 
+		const numOmniLayers = settings.omni?.layers?.length ?? 1;
+		if(settings.omni) settings.omni.layerStartIndex = Math.min(numOmniLayers - 1, settings.omni?.layerStartIndex ?? 0);
+
 		// Initialize Wasm Canvas
 		c.ptr = this.e._constructor(
 			this.i,
@@ -295,8 +298,8 @@ export class Wasm {
 			!!settings.gallery?.isSpreads && settings.gallery.type == 'swipe',
 			c.isOmni,
 			settings.pinchZoomOutLimit ?? false,
-			settings.omni?.layers?.length ?? 1,
-			settings.omni?.startIndex ?? 0,
+			numOmniLayers,
+			settings.omni?.layerStartIndex ?? 0,
 		);
 
 		this.bindCamera(c);