feat: vite

apps/phoenix/src/App.tsx

@@ -1,42 +1,85 @@
-import {
-  readImageDicomFileSeries,
-  structuredReportToHtml,
-} from "@itk-wasm/dicom";
+import { useEffect, useRef, useState } from "react";
+import { readImageDicomFileSeries } from "@itk-wasm/dicom";
 import vtkITKHelper from "@kitware/vtk.js/Common/DataModel/ITKHelper";
 import vtkVolume from "@kitware/vtk.js/Rendering/Core/Volume";
 import vtkFullScreenRenderWindow from "@kitware/vtk.js/Rendering/Misc/FullScreenRenderWindow";
 import "@kitware/vtk.js/Rendering/Profiles/Volume";
-import { useEffect, useRef, useState } from "react";
 import vtkRenderer from "@kitware/vtk.js/Rendering/Core/Renderer";
 import vtkVolumeMapper from "@kitware/vtk.js/Rendering/Core/VolumeMapper";
 import vtkRenderWindow from "@kitware/vtk.js/Rendering/Core/RenderWindow";
 
+import "./app.css";
+import {
+  checkExistenceInIndexedDB,
+  loadImageFromIndexedDB,
+  saveImageToIndexedDB,
+} from "./util";
+import { extractAxialSliceAsImage } from "./extract";
+
 function App() {
   const [files, setFiles] = useState<File[]>([]);
   const inputRef = useRef<HTMLInputElement>(null);
+
+  const axialRef = useRef<HTMLElement | null>(null);
+  const sagittalRef = useRef<HTMLElement | null>(null);
+  const coronalRef = useRef<HTMLElement | null>(null);
+
   const rendererRef = useRef<vtkRenderer>();
   const mapperRef = useRef<vtkVolumeMapper>();
   const actorRef = useRef<vtkVolume>();
   const renderWindowRef = useRef<vtkRenderWindow>();
 
+  const [image, setImage] = useState();
+
   useEffect(() => {
-    if (inputRef.current) {
-      inputRef.current.webkitdirectory = true;
+    if (inputRef.current) inputRef.current.webkitdirectory = true;
+  }, []);
+
+  useEffect(() => {
+    checkExistenceInIndexedDB("outputImageKey").then((exist) => {
+      if (exist) {
+        console.time("start load from cache");
+        loadImageFromIndexedDB().then((outputImage) => {
+          const fullScreenRenderer = vtkFullScreenRenderWindow.newInstance({
+            container: axialRef.current,
+          });
+          rendererRef.current = fullScreenRenderer.getRenderer();
+          renderWindowRef.current = fullScreenRenderer.getRenderWindow();
+          actorRef.current = vtkVolume.newInstance();
+          mapperRef.current = vtkVolumeMapper.newInstance({
+            sampleDistance: 1.1,
+          });
+          const vtkImage = vtkITKHelper.convertItkToVtkImage(outputImage);
+          mapperRef.current?.setInputData(vtkImage);
+          mapperRef.current && actorRef.current?.setMapper(mapperRef.current);
+          actorRef.current && rendererRef.current?.addVolume(actorRef.current);
+          rendererRef.current?.resetCamera();
+          renderWindowRef.current?.render();
+          console.timeEnd("start load from cache");
+
+          const imgSource = extractAxialSliceAsImage(vtkImage, 1);
+          setImage(imgSource);
+        });
       }
+    });
   }, []);
 
   useEffect(() => {
     if (files.length > 0) {
-      const fullScreenRenderer = vtkFullScreenRenderWindow.newInstance({});
+      const fullScreenRenderer = vtkFullScreenRenderWindow.newInstance({
+        container: axialRef.current,
+      });
       rendererRef.current = fullScreenRenderer.getRenderer();
       renderWindowRef.current = fullScreenRenderer.getRenderWindow();
       actorRef.current = vtkVolume.newInstance();
       mapperRef.current = vtkVolumeMapper.newInstance({ sampleDistance: 1.1 });
-
+      console.time("itk-wasm parse vtkVolumeImageData");
       readImageDicomFileSeries(null, {
         inputImages: files,
       }).then((image) => {
         const vtkImage = vtkITKHelper.convertItkToVtkImage(image.outputImage);
+        console.timeEnd("itk-wasm parse vtkVolumeImageData");
+        saveImageToIndexedDB(image.outputImage);
         mapperRef.current?.setInputData(vtkImage);
         mapperRef.current && actorRef.current?.setMapper(mapperRef.current);
         actorRef.current && rendererRef.current?.addVolume(actorRef.current);
@@ -72,6 +115,12 @@ function App() {
         ref={inputRef}
         style={{ position: "fixed", zIndex: 100 }}
       />
+      <div className="mpr">
+        <div ref={axialRef} style={{ width: 500, height: 500 }}></div>
+        {/* <div ref={sagittalRef} style={{ width: 300, height: 300 }}></div>
+        <div ref={coronalRef} style={{ width: 300, height: 300 }}></div> */}
+      </div>
+      <img src={image} style={{ width: 200, height: 200 }} />
     </>
   );
 }

apps/phoenix/src/app.css

@@ -0,0 +1,8 @@
+.mpr {
+  position: fixed;
+  top: 20px;
+  left: 50%;
+  transform: translateX(-50%);
+  display: flex;
+  flex-direction: column;
+}

apps/phoenix/src/extract.ts

@@ -0,0 +1,38 @@
+import vtkImageData from "@kitware/vtk.js/Common/DataModel/ImageData";
+
+export const extractAxialSliceAsImage = (
+  volumeData: vtkImageData,
+  sliceIndex: number
+): string => {
+  const dimensions = volumeData.getDimensions();
+
+  if (sliceIndex < 0 || sliceIndex >= dimensions[2]) {
+    throw new Error("Invalid slice index");
+  }
+
+  const scalars = volumeData.getPointData().getScalars();
+  const slice = scalars
+    .getData()
+    .slice(
+      sliceIndex * dimensions[0] * dimensions[1],
+      (sliceIndex + 1) * dimensions[0] * dimensions[1]
+    );
+
+  const canvas = document.createElement("canvas");
+  canvas.width = dimensions[0];
+  canvas.height = dimensions[1];
+  const context = canvas.getContext("2d")!;
+  const imageDataObj = context.createImageData(dimensions[0], dimensions[1]);
+
+  for (let i = 0; i < slice.length; i++) {
+    const value = slice[i];
+    imageDataObj.data[i * 4] = value;
+    imageDataObj.data[i * 4 + 1] = value;
+    imageDataObj.data[i * 4 + 2] = value;
+    imageDataObj.data[i * 4 + 3] = 255;
+  }
+
+  context.putImageData(imageDataObj, 0, 0);
+
+  return canvas.toDataURL();
+};

apps/phoenix/src/util.ts

@@ -0,0 +1,91 @@
+const dbName = "myDatabase";
+const storeName = "images";
+
+export const openDatabase = async (): Promise<IDBDatabase> => {
+  return new Promise((resolve, reject) => {
+    const request = indexedDB.open(dbName);
+
+    request.onupgradeneeded = (event: IDBVersionChangeEvent) => {
+      const db = request.result;
+      if (!db.objectStoreNames.contains(storeName)) {
+        db.createObjectStore(storeName);
+      }
+    };
+
+    request.onerror = (event) => reject(request.error);
+    request.onsuccess = (event) => resolve(request.result);
+  });
+};
+
+export const saveImageToIndexedDB = async (outputImage: any) => {
+  try {
+    const db = await openDatabase();
+
+    const transaction = db.transaction(storeName, "readwrite");
+    const store = transaction.objectStore(storeName);
+
+    const request = store.put(outputImage, "outputImageKey");
+    request.onerror = (event) =>
+      console.error("Error saving to IndexedDB", request.error);
+    request.onsuccess = (event) => console.log("Image saved to IndexedDB");
+  } catch (error) {
+    console.error("Error with IndexedDB operation", error);
+  }
+};
+
+export const loadImageFromIndexedDB = async (): Promise<any> => {
+  try {
+    const db = await openDatabase();
+
+    const transaction = db.transaction(storeName, "readonly");
+    const store = transaction.objectStore(storeName);
+
+    const request = store.get("outputImageKey");
+    return new Promise((resolve, reject) => {
+      request.onerror = (event) => {
+        console.error("Error fetching from IndexedDB", request.error);
+        reject(request.error);
+      };
+      request.onsuccess = (event) => {
+        if (request.result) {
+          console.log("Image loaded from IndexedDB");
+          resolve(request.result);
+        } else {
+          console.log("No data found in IndexedDB");
+          resolve(null);
+        }
+      };
+    });
+  } catch (error) {
+    console.error("Error with IndexedDB operation", error);
+    throw error;
+  }
+};
+
+export const checkExistenceInIndexedDB = async (
+  key: string
+): Promise<boolean> => {
+  try {
+    const dbName = "myDatabase";
+    const storeName = "images";
+    const db = await openDatabase();
+
+    const transaction = db.transaction(storeName, "readonly");
+    const store = transaction.objectStore(storeName);
+
+    const request = store.get(key);
+
+    return new Promise((resolve, reject) => {
+      request.onerror = (event) => {
+        console.error("Error fetching from IndexedDB", request.error);
+        reject(request.error);
+      };
+      request.onsuccess = (event) => {
+        resolve(request.result !== undefined);
+      };
+    });
+  } catch (error) {
+    console.error("Error with IndexedDB operation", error);
+    throw error;
+  }
+};