Fix local svs read order

Author: XanthosXanthopoulos

packages/core/src/tile/factories/imageFactory.ts

@@ -30,8 +30,8 @@ registerAssetFactory(
         const image = opts.token ? await fetch(opts.uri, {
             headers: { Authorization: `Bearer ${opts.token}` }
         }).then(response => response.arrayBuffer()).then(buffer => new File([buffer as BlobPart], "image.svs")).then(file => openslide.open(file)) : await openslide.open(opts.uri);
-        const extent = await image.getLevelDimensions(0);
-        const extent_max = await image.getLevelDimensions(await image.getLevelCount() - 1);
+        const extent = await image.getLevelDimensions(await image.getLevelCount() - 1);
+        const extent_max = await image.getLevelDimensions(0);
         ctx.sceneOptions.extents.encapsulateBoundingInfo(
             new BoundingInfo(new Vector3(0, 0, 0), new Vector3(extent[0], extent[1], 0))
         );
@@ -45,7 +45,7 @@ registerAssetFactory(
             id: opts.uri,
             uri: opts.uri,
             name: opts.name ?? "",
-            root: constructImageTileset(await Promise.all(Array.from({ length: await image.getLevelCount() }, (_, i) => i).map(async (i) => {
+            root: constructImageTileset(await Promise.all(Array.from({ length: await image.getLevelCount() }, (_, i) => i).reverse().map(async (i) => {
                 const extent = await image.getLevelDimensions(i);
                 return {
                     width: [0, extent[0] - 1],

packages/core/src/tile/fetchers/svs_fetcher.ts

@@ -48,6 +48,8 @@ export class SVSImageFetcher extends Fetcher<
         }, [buffer.buffer]);
     });
 
+    console.log(tile.id, region[0].min, region[1].min, level, width, height);
+
     return new Promise((resolve, _) => {
       this.workerPool.callbacks.set(`${tile.id}_${options.nonce}`, resolve);
     });
@@ -113,7 +115,7 @@ export function constructImageTileset(
         const tile = new Tile<ImageDataContent, ImageContent>();
         tile.boundingInfo = getBoundingInfo(physicalExtent);
         tile.content.push({
-          uri: `${idx}`,
+          uri: `${levels.length - idx - 1}`,
           region: [
             {
               dimension: 'x',

packages/core/src/tile/worker/loaders/svsImageLoader.ts

@@ -16,7 +16,7 @@ export async function svsImageRequest(
   payload: SVSImagePayload
 ) {
 
-  const sourceAxes = ["Y", "X", "C"];
+  const sourceAxes = ["X", "Y", "C"];
   const axes = new Axes(sourceAxes, ['C', 'Y', 'X']);
 
   const channelSlices = new Map<number, any>();