AllenInstitute · TheMooseman · Jan 2, 2025 · Jan 6, 2025 · Jan 6, 2025 · Jan 6, 2025
@@ -1,12 +1,10 @@
 <!doctype html>
 <html>
     <body>
-        EXAMPLES
-        <br />
-        <ul>
-            <li><a href="/dzi">Deep Zoom Image</a><br /></li>
-            <li><a href="/omezarr">OMEZARR</a><br /></li>
-            <li><a href="/layers">Layers</a><br /></li>
-        </ul>
+        <div id="app"></div>
+        <script
+            type="module"
+            src="/src/index.tsx"
+        ></script>
     </body>
 </html>
@@ -42,10 +42,10 @@
         "vite": "^5.3.5"
     },
     "dependencies": {
-        "@alleninstitute/vis-geometry": "workspace:*",
-        "@alleninstitute/vis-scatterbrain": "workspace:*",
         "@alleninstitute/vis-dzi": "workspace:*",
+        "@alleninstitute/vis-geometry": "workspace:*",
         "@alleninstitute/vis-omezarr": "workspace:*",
+        "@alleninstitute/vis-scatterbrain": "workspace:*",
         "@czi-sds/components": "^20.0.1",
         "@emotion/css": "^11.11.2",
         "@emotion/react": "^11.11.4",
@@ -61,6 +61,7 @@
         "lodash": "^4.17.21",
         "react": "^18.3.0",
         "react-dom": "^18.3.0",
+        "react-router": "^7.0.2",
         "regl": "^2.1.0",
         "zarrita": "0.4.0-next.14"
     }

@@ -1,58 +1,27 @@
 import React from 'react';
-import { SliceViewLayer } from './ui/slice-ui';
-import type { Demo } from './layers';
-import { AnnotationGrid } from './ui/annotation-grid';
-import { ContactSheetUI } from './ui/contact-sheet';
-import { ScatterplotUI } from './ui/scatterplot-ui';
-import { Button } from '@czi-sds/components';
+import { BrowserRouter, Route, Routes } from 'react-router';
+import { Home } from './home';
+import { OmezarrDemo } from './omezarr/omezarr-demo';
+import { DziDemo } from './dzi/dzi-demo';
 
-export function AppUi(props: { demo: Demo }) {
-    const { demo } = props;
+export function App() {
     return (
-        <div>
-            <Button
-                onClick={() => {
-                    demo.requestSnapshot(3000);
-                }}
-            >
-                {'📸'}
-            </Button>
-            <label>{`Layer ${demo.selectedLayer}`}</label>
-            <Button
-                onClick={() => {
-                    demo.selectLayer(demo.selectedLayer - 1);
-                }}
-            >
-                {'<-'}
-            </Button>
-            <Button
-                onClick={() => {
-                    demo.selectLayer(demo.selectedLayer + 1);
-                }}
-            >
-                {'->'}
-            </Button>
-            <LayerUi demo={demo} />
-        </div>
+        <BrowserRouter>
+            <Routes>
+                <Route
+                    index
+                    element={<Home />}
+                />
+                <Route
+                    path="/dzi"
+                    element={<DziDemo />}
+                />
+                <Route
+                    path="/omezarr"
+                    element={<OmezarrDemo />}
+                />
+                <Route path="/layers" />
+            </Routes>
+        </BrowserRouter>
     );
 }
-function LayerUi(props: { demo: Demo }) {
-    const { demo } = props;
-    const layer = demo.layers[demo.selectedLayer];
-    if (layer) {
-        switch (layer.type) {
-            case 'annotationGrid':
-                return <AnnotationGrid demo={demo} />;
-            case 'volumeGrid':
-                return <ContactSheetUI demo={demo} />;
-            case 'volumeSlice':
-                return <SliceViewLayer demo={demo} />;
-            case 'scatterplot':
-            case 'scatterplotGrid':
-                return <ScatterplotUI demo={demo} />;
-            default:
-                return null;
-        }
-    }
-    return <SliceViewLayer demo={props.demo} />;
-}
@@ -1,8 +1,43 @@
-import type { box2D, vec2 } from '@alleninstitute/vis-geometry';
+import { Box2D, Vec2, type box2D, type vec2 } from '@alleninstitute/vis-geometry';
 
 // a basic camera, for viewing slices
 export type Camera = {
     readonly view: box2D; // a view in 'data space'
     readonly screen: vec2; // what that view projects to in display space, aka pixels
     readonly projection: 'webImage' | 'cartesian';
 };
+/**
+ * Zooms relative to your current mouse position
+ * @param view box2d in dataspace that is mapped to the canvas
+ * @param screenSize in pixels
+ * @param zoomScale
+ * @param mousePos mouse position in pixels
+ */
+export function zoom(view: box2D, screenSize: vec2, zoomScale: number, mousePos: vec2): box2D {
+    // translate mouse pos to data space
+    // offset divided by screen size gives us a percentage of the canvas where the mouse is
+    // multiply percentage by view size to make it data space
+    // add offset of the min corner so that the position takes into account any box offset
+    const zoomPoint: vec2 = Vec2.add(view.minCorner, Vec2.mul(Vec2.div(mousePos, screenSize), Box2D.size(view)));
+
+    // scale the box with our new zoom point as the center
+    const newView = Box2D.translate(
+        Box2D.scale(Box2D.translate(view, Vec2.scale(zoomPoint, -1)), [zoomScale, zoomScale]),
+        zoomPoint
+    );
+
+    return newView;
+}
+
+/**
+ *
+ * @param view box2d in dataspace that is mapped to the canvas
+ * @param screenSize
+ * @param mousePos mouse position in pixels
+ */
+export function pan(view: box2D, screenSize: vec2, mousePos: vec2): box2D {
+    const relativePos = Vec2.div(Vec2.mul(mousePos, [-1, -1]), screenSize);
+    const scaledOffset = Vec2.mul(relativePos, Box2D.size(view));
+    const newView = Box2D.translate(view, scaledOffset);
+    return newView;
+}
@@ -0,0 +1,81 @@
+import type { DziImage } from '@alleninstitute/vis-dzi';
+
+// DZI files will come with XML or JSON to give you important information such as the width, height, and format.
+// Below is a function for parsing an xml with that data, althought sometimes it comes in JSON format.
+// At the end of the file you can see two examples of the metadata format you might see, one as XML and another as JSON
+/**
+ * This function helps decode xml metadata for a dzi file.
+ * @param s the contents of the url param - expected to be an XML doc describing the DZI image
+ * @param url location of the .dzi file
+ * @returns formatted dzi image data
+ */
+function decodeDziXml(s: string, url: string): DziImage | undefined {
+    const parser = new DOMParser();
+    const doc = parser.parseFromString(s, 'text/xml');
+    // catch any errors if the xml is malformed
+    const err = doc.querySelector('Error');
+    if (err) return undefined;
+
+    if (doc) {
+        const img = doc.getElementsByTagName('Image')[0];
+        const size = doc.getElementsByTagName('Size')[0];
+        // format: as jpg/png
+        // overlap: how much overlap there is between images so that we can compensate the rendering
+        // tile size: how big in pixels each tile is
+        const [format, overlap, tileSize] = [
+            img.getAttribute('Format'),
+            img.getAttribute('Overlap'),
+            img.getAttribute('TileSize'),
+        ];
+        if (size && format && overlap && tileSize) {
+            // width and height of the image, so we can properly size the view
+            const width = size.getAttribute('Width');
+            const height = size.getAttribute('Height');
+
+            // the url ends with .dzi to denote that we're reaching for a dzi file
+            // in order to get the images from that url we need to remove the .dzi
+            // and replace it with _files/ so that the image viewer knows where to look
+            const dataLoc = url.split('.dzi')[0];
+            if (width && height && dataLoc) {
+                return {
+                    imagesUrl: `${dataLoc}_files/`,
+                    format: format as 'jpeg' | 'png' | 'jpg' | 'JPG' | 'PNG',
+                    overlap: Number.parseInt(overlap, 10),
+                    tileSize: Number.parseInt(tileSize, 10),
+                    size: {
+                        width: Number.parseInt(width, 10),
+                        height: Number.parseInt(height, 10),
+                    },
+                };
+            }
+        }
+    }
+
+    return undefined;
+}
+
+/* Example XML
+<?xml version="1.0" encoding="UTF-8"?>
+<Image xmlns="http://schemas.microsoft.com/deepzoom/2008"
+       Format="jpg" 
+       Overlap="2" 
+       TileSize="256" >
+    <Size Height="9221" 
+          Width="7026"/>
+</Image>
+*/
+
+/* Example JSON
+{
+    "Image": {
+        "xmlns":    "http://schemas.microsoft.com/deepzoom/2008",
+        "Format":   "jpg", 
+        "Overlap":  "2", 
+        "TileSize": "256",
+        "Size": {
+            "Height": "9221",
+            "Width":  "7026"
+        }
+    }
+}
+*/