Implment kitty graphics placement action

2026-02-19 15:00:33 -08:00
parent 30c97a225c
commit 5c28e27062
3 changed files with 336 additions and 18 deletions
@@ -81,6 +81,14 @@ export class KittyImageStorage implements IDisposable {
  }

  public addImage(kittyId: number, image: HTMLCanvasElement | ImageBitmap, scrolling: boolean, layer: ImageLayer, zIndex: number): void {
+    // Clean up stale reverse-mapping from a previous placement of the same
+    // kitty image.  The old shared-storage entry is kept (it may still be
+    // visible on screen) but its reverse mapping is removed so that eviction
+    // of the old entry won't incorrectly delete the kitty image data.
+    const oldStorageId = this._kittyIdToStorageId.get(kittyId);
+    if (oldStorageId !== undefined) {
+      this._storageIdToKittyId.delete(oldStorageId);
+    }
    const storageId = this._storage.addImage(image, scrolling, layer, zIndex);
    this._kittyIdToStorageId.set(kittyId, storageId);
    this._storageIdToKittyId.set(storageId, kittyId);