feat(web): show ocr text boxes in panoramas

web/src/lib/components/asset-viewer/asset-viewer.svelte

@@ -424,7 +424,6 @@
   const showOcrButton = $derived(
     $slideshowState === SlideshowState.None &&
       asset.type === AssetTypeEnum.Image &&
-      !(asset.exifInfo?.projectionType === 'EQUIRECTANGULAR') &&
       !assetViewerManager.isShowEditor &&
       ocrManager.hasOcrData,
   );

web/src/lib/components/asset-viewer/ocr-bounding-box.svelte

@@ -1,6 +1,6 @@
 <script lang="ts">
   import type { OcrBox } from '$lib/utils/ocr-utils';
-  import { calculateBoundingBoxDimensions } from '$lib/utils/ocr-utils';
+  import { calculateBoundingBoxMatrix } from '$lib/utils/ocr-utils';
 
   type Props = {
     ocrBox: OcrBox;
@@ -8,28 +8,19 @@
 
   let { ocrBox }: Props = $props();
 
-  const dimensions = $derived(calculateBoundingBoxDimensions(ocrBox.points));
+  const dimensions = $derived(calculateBoundingBoxMatrix(ocrBox.points));
 
-  const transform = $derived(
-    `translate(${dimensions.minX}px, ${dimensions.minY}px) rotate(${dimensions.rotation}deg) skew(${dimensions.skewX}deg, ${dimensions.skewY}deg)`,
-  );
-
-  const transformOrigin = $derived(
-    `${dimensions.centerX - dimensions.minX}px ${dimensions.centerY - dimensions.minY}px`,
+  const transform = $derived(`matrix3d(${dimensions.matrix.join(',')})`);
+  // Fits almost all strings within the box, depends on font family
+  const fontSize = $derived(
+    `max(var(--text-sm), min(var(--text-6xl), ${(1.4 * dimensions.width) / ocrBox.text.length}px))`,
   );
 </script>
 
-<div class="absolute group left-0 top-0 pointer-events-none">
-  <!-- Bounding box with CSS transforms -->
+<div class="absolute left-0 top-0">
   <div
-    class="absolute border-2 border-blue-500 bg-blue-500/10 cursor-pointer pointer-events-auto transition-all group-hover:bg-blue-500/30 group-hover:border-blue-600 group-hover:border-[3px]"
-    style="width: {dimensions.width}px; height: {dimensions.height}px; transform: {transform}; transform-origin: {transformOrigin};"
-  ></div>
-
-  <!-- Text overlay - always rendered but invisible, allows text selection and copy -->
-  <div
-    class="absolute flex items-center justify-center text-transparent text-sm px-2 py-1 pointer-events-auto cursor-text whitespace-pre-wrap wrap-break-word select-text group-hover:text-white group-hover:bg-black/75 group-hover:z-10"
-    style="width: {dimensions.width}px; height: {dimensions.height}px; transform: {transform}; transform-origin: {transformOrigin};"
+    class="absolute flex items-center justify-center text-transparent text-sm border-2 border-blue-500 bg-blue-500/10 px-2 py-1 pointer-events-auto cursor-text whitespace-pre-wrap wrap-break-word select-text transition-all hover:text-white hover:bg-black/60 hover:border-blue-600 hover:border-3"
+    style="font-size: {fontSize}; width: {dimensions.width}px; height: {dimensions.height}px; transform: {transform}; transform-origin: 0 0;"
   >
     {ocrBox.text}
   </div>

web/src/lib/components/asset-viewer/photo-sphere-viewer-adapter.svelte

@@ -2,8 +2,10 @@
   import { shortcuts } from '$lib/actions/shortcut';
   import AssetViewerEvents from '$lib/components/AssetViewerEvents.svelte';
   import { assetViewerManager } from '$lib/managers/asset-viewer-manager.svelte';
+  import { ocrManager, type OcrBoundingBox } from '$lib/stores/ocr.svelte';
   import { boundingBoxesArray, type Faces } from '$lib/stores/people.store';
   import { alwaysLoadOriginalFile } from '$lib/stores/preferences.store';
+  import { calculateBoundingBoxMatrix, getOcrBoundingBoxesAtSize, type Point } from '$lib/utils/ocr-utils';
   import {
     EquirectangularAdapter,
     Viewer,
@@ -27,6 +29,17 @@
     strokeLinejoin: 'round',
   };
 
+  // Adapted as well as possible from classlist 'border-2 border-blue-500 bg-blue-500/10 hover:border-blue-600 hover:border-3'
+  const OCR_BOX_SVG_STYLE = {
+    fill: 'var(--color-blue-500)',
+    fillOpacity: '0.1',
+    stroke: 'var(--color-blue-500)',
+    strokeWidth: '2px',
+  };
+
+  const OCR_TOOLTIP_HTML_CLASS =
+    'flex items-center justify-center text-white bg-black/50 cursor-text pointer-events-auto whitespace-pre-wrap wrap-break-word select-text';
+
   type Props = {
     panorama: string | { source: string };
     originalPanorama?: string | { source: string };
@@ -96,6 +109,59 @@
     }
   });
 
+  $effect(() => {
+    updateOcrBoxes(ocrManager.showOverlay, ocrManager.data);
+  });
+
+  /** Use updateOnly=true on zoom, pan, or resize. */
+  const updateOcrBoxes = (showOverlay: boolean, ocrData: OcrBoundingBox[], updateOnly = false) => {
+    if (!viewer || !viewer.state.textureData || !viewer.getPlugin(MarkersPlugin)) {
+      return;
+    }
+    const markersPlugin = viewer.getPlugin<MarkersPlugin>(MarkersPlugin);
+    if (!showOverlay) {
+      markersPlugin.clearMarkers();
+      return;
+    }
+    if (!updateOnly) {
+      markersPlugin.clearMarkers();
+    }
+
+    const boxes = getOcrBoundingBoxesAtSize(ocrData, {
+      width: viewer.state.textureData.panoData.croppedWidth,
+      height: viewer.state.textureData.panoData.croppedHeight,
+    });
+
+    for (const [index, box] of boxes.entries()) {
+      const points = box.points.map((p) => texturePointToViewerPoint(viewer, p));
+      const { matrix, width, height } = calculateBoundingBoxMatrix(points);
+
+      const fontSize = (1.4 * width) / box.text.length; // fits almost all strings within the box, depends on font family
+      const transform = `matrix3d(${matrix.join(',')})`;
+      const content = `<div class="${OCR_TOOLTIP_HTML_CLASS}" style="font-size: ${fontSize}px; width: ${width}px; height: ${height}px; transform: ${transform}; transform-origin: 0 0;">${box.text}</div>`;
+
+      if (updateOnly) {
+        markersPlugin.updateMarker({
+          id: `box_${index}`,
+          polygonPixels: box.points.map((b) => [b.x, b.y]),
+          tooltip: { content },
+        });
+      } else {
+        markersPlugin.addMarker({
+          id: `box_${index}`,
+          polygonPixels: box.points.map((b) => [b.x, b.y]),
+          svgStyle: OCR_BOX_SVG_STYLE,
+          tooltip: { content, trigger: 'click' },
+        });
+      }
+    }
+  };
+
+  const texturePointToViewerPoint = (viewer: Viewer, point: Point) => {
+    const spherical = viewer.dataHelper.textureCoordsToSphericalCoords({ textureX: point.x, textureY: point.y });
+    return viewer.dataHelper.sphericalCoordsToViewerCoords(spherical);
+  };
+
   const onZoom = () => {
     viewer?.animate({ zoom: assetViewerManager.zoom > 1 ? 50 : 83.3, speed: 250 });
   };
@@ -160,7 +226,20 @@
       viewer.addEventListener(events.ZoomUpdatedEvent.type, zoomHandler, { passive: true });
     }
 
-    return () => viewer.removeEventListener(events.ZoomUpdatedEvent.type, zoomHandler);
+    const onReadyHandler = () => updateOcrBoxes(ocrManager.showOverlay, ocrManager.data, false);
+    const updateHandler = () => updateOcrBoxes(ocrManager.showOverlay, ocrManager.data, true);
+    viewer.addEventListener(events.ReadyEvent.type, onReadyHandler);
+    viewer.addEventListener(events.PositionUpdatedEvent.type, updateHandler);
+    viewer.addEventListener(events.SizeUpdatedEvent.type, updateHandler);
+    viewer.addEventListener(events.ZoomUpdatedEvent.type, updateHandler, { passive: true });
+
+    return () => {
+      viewer.removeEventListener(events.ReadyEvent.type, onReadyHandler);
+      viewer.removeEventListener(events.PositionUpdatedEvent.type, updateHandler);
+      viewer.removeEventListener(events.SizeUpdatedEvent.type, updateHandler);
+      viewer.removeEventListener(events.ZoomUpdatedEvent.type, updateHandler);
+      viewer.removeEventListener(events.ZoomUpdatedEvent.type, zoomHandler);
+    };
   });
 
   onDestroy(() => {
@@ -176,3 +255,25 @@
 
 <svelte:document use:shortcuts={[{ shortcut: { key: 'z' }, onShortcut: onZoom, preventDefault: true }]} />
 <div class="h-full w-full mb-0" bind:this={container}></div>
+
+<style>
+  /* Reset the default tooltip styling */
+  :global(.psv-tooltip) {
+    top: 0 !important;
+    left: 0 !important;
+    background: none;
+    box-shadow: none;
+    width: 0;
+    height: 0;
+  }
+
+  :global(.psv-tooltip-content) {
+    font: var(--font-normal);
+    padding: 0;
+    text-shadow: none;
+  }
+
+  :global(.psv-tooltip-arrow) {
+    display: none;
+  }
+</style>

web/src/lib/utils/ocr-utils.ts

@@ -12,70 +12,58 @@ const getContainedSize = (img: HTMLImageElement): { width: number; height: numbe
   return { width, height };
 };
 
+export type Point = {
+  x: number;
+  y: number;
+};
+
 export interface OcrBox {
   id: string;
-  points: { x: number; y: number }[];
+  points: Point[];
   text: string;
   confidence: number;
 }
 
-export interface BoundingBoxDimensions {
-  minX: number;
-  maxX: number;
-  minY: number;
-  maxY: number;
-  width: number;
-  height: number;
-  centerX: number;
-  centerY: number;
-  rotation: number;
-  skewX: number;
-  skewY: number;
-}
-
 /**
- * Calculate bounding box dimensions and properties from OCR points
+ * Calculate bounding box transform from OCR points. Result matrix can be used as input for css matrix3d.
  * @param points - Array of 4 corner points of the bounding box
- * @returns Dimensions, rotation, and skew values for the bounding box
+ * @returns 4x4 matrix to transform the div with text onto the polygon defined by the corner points, and size to set on the source div.
  */
-export const calculateBoundingBoxDimensions = (points: { x: number; y: number }[]): BoundingBoxDimensions => {
+export const calculateBoundingBoxMatrix = (points: Point[]): { matrix: number[]; width: number; height: number } => {
   const [topLeft, topRight, bottomRight, bottomLeft] = points;
-  const minX = Math.min(...points.map(({ x }) => x));
-  const maxX = Math.max(...points.map(({ x }) => x));
-  const minY = Math.min(...points.map(({ y }) => y));
-  const maxY = Math.max(...points.map(({ y }) => y));
-  const width = maxX - minX;
-  const height = maxY - minY;
-  const centerX = (minX + maxX) / 2;
-  const centerY = (minY + maxY) / 2;
 
-  // Calculate rotation angle from the bottom edge (bottomLeft to bottomRight)
-  const rotation = Math.atan2(bottomRight.y - bottomLeft.y, bottomRight.x - bottomLeft.x) * (180 / Math.PI);
+  // Approximate width and height to prevent text distortion as much as possible
+  const distance = (p1: Point, p2: Point) => Math.hypot(p2.x - p1.x, p2.y - p1.y);
+  const width = Math.max(distance(topLeft, topRight), distance(bottomLeft, bottomRight));
+  const height = Math.max(distance(topLeft, bottomLeft), distance(topRight, bottomRight));
 
-  // Calculate skew angles to handle perspective distortion
-  // SkewX: compare left and right edges
-  const leftEdgeAngle = Math.atan2(bottomLeft.y - topLeft.y, bottomLeft.x - topLeft.x);
-  const rightEdgeAngle = Math.atan2(bottomRight.y - topRight.y, bottomRight.x - topRight.x);
-  const skewX = (rightEdgeAngle - leftEdgeAngle) * (180 / Math.PI);
+  const dx1 = topRight.x - bottomRight.x;
+  const dx2 = bottomLeft.x - bottomRight.x;
+  const dx3 = topLeft.x - topRight.x + bottomRight.x - bottomLeft.x;
 
-  // SkewY: compare top and bottom edges
-  const topEdgeAngle = Math.atan2(topRight.y - topLeft.y, topRight.x - topLeft.x);
-  const bottomEdgeAngle = Math.atan2(bottomRight.y - bottomLeft.y, bottomRight.x - bottomLeft.x);
-  const skewY = (bottomEdgeAngle - topEdgeAngle) * (180 / Math.PI);
+  const dy1 = topRight.y - bottomRight.y;
+  const dy2 = bottomLeft.y - bottomRight.y;
+  const dy3 = topLeft.y - topRight.y + bottomRight.y - bottomLeft.y;
 
-  return {
-    minX,
-    maxX,
-    minY,
-    maxY,
-    width,
-    height,
-    centerX,
-    centerY,
-    rotation,
-    skewX,
-    skewY,
-  };
+  const det = dx1 * dy2 - dx2 * dy1;
+  const a13 = (dx3 * dy2 - dx2 * dy3) / det;
+  const a23 = (dx1 * dy3 - dx3 * dy1) / det;
+
+  const a11 = (1 + a13) * topRight.x - topLeft.x;
+  const a21 = (1 + a23) * bottomLeft.x - topLeft.x;
+
+  const a12 = (1 + a13) * topRight.y - topLeft.y;
+  const a22 = (1 + a23) * bottomLeft.y - topLeft.y;
+
+  // prettier-ignore
+  const matrix = [
+    a11 / width, a12 / width, 0, a13 / width,
+    a21 / height, a22 / height, 0, a23 / height,
+    0, 0, 1, 0,
+    topLeft.x, topLeft.y, 0, 1,
+  ];
+
+  return { matrix, width, height };
 };
 
 /**
@@ -87,18 +75,32 @@ export const getOcrBoundingBoxes = (
   zoom: ZoomImageWheelState,
   photoViewer: HTMLImageElement | null,
 ): OcrBox[] => {
-  const boxes: OcrBox[] = [];
-
   if (photoViewer === null || !photoViewer.naturalWidth || !photoViewer.naturalHeight) {
-    return boxes;
+    return [];
   }
 
   const clientHeight = photoViewer.clientHeight;
   const clientWidth = photoViewer.clientWidth;
   const { width, height } = getContainedSize(photoViewer);
 
-  const imageWidth = photoViewer.naturalWidth;
-  const imageHeight = photoViewer.naturalHeight;
+  const offset = {
+    x: ((clientWidth - width) / 2) * zoom.currentZoom + zoom.currentPositionX,
+    y: ((clientHeight - height) / 2) * zoom.currentZoom + zoom.currentPositionY,
+  };
+
+  return getOcrBoundingBoxesAtSize(
+    ocrData,
+    { width: width * zoom.currentZoom, height: height * zoom.currentZoom },
+    offset,
+  );
+};
+
+export const getOcrBoundingBoxesAtSize = (
+  ocrData: OcrBoundingBox[],
+  targetSize: { width: number; height: number },
+  offset?: Point,
+) => {
+  const boxes: OcrBox[] = [];
 
   for (const ocr of ocrData) {
     // Convert normalized coordinates (0-1) to actual pixel positions
@@ -109,14 +111,8 @@ export const getOcrBoundingBoxes = (
       { x: ocr.x3, y: ocr.y3 },
       { x: ocr.x4, y: ocr.y4 },
     ].map((point) => ({
-      x:
-        (width / imageWidth) * zoom.currentZoom * point.x * imageWidth +
-        ((clientWidth - width) / 2) * zoom.currentZoom +
-        zoom.currentPositionX,
-      y:
-        (height / imageHeight) * zoom.currentZoom * point.y * imageHeight +
-        ((clientHeight - height) / 2) * zoom.currentZoom +
-        zoom.currentPositionY,
+      x: targetSize.width * point.x + (offset?.x ?? 0),
+      y: targetSize.height * point.y + (offset?.y ?? 0),
     }));
 
     boxes.push({