[Bug] GoogleMapsOverlay crashes when a vector map is temporarily zero-width #10596

Description

Hi! We found a crash in GoogleMapsOverlay when Google Maps briefly reports a vector map with zero width and a positive height.

getViewPropsFromCoordinateTransformer calculates aspect = 0 for that frame. Deck cannot invert the resulting projection matrix, and the reused MapView then throws TypeError: Cannot read properties of null (reading '0').

I reproduced this in deck.gl 9.3.10 and current master at 4059257667f07b379f4c5f019eb88ea20260d5c5 using deck.gl's Google Maps mock and the overlay's normal lifecycle. This resembles #4218, though it occurs in the vector-map coordinate transformer.

Flavors

GoogleMapsOverlay

Expected Behavior

A draw should not throw while either map dimension is zero. Once the map has a visible size again, the next draw can restore the correct projection.

Steps to Reproduce

Add this test to test/modules/google-maps/google-maps-overlay.spec.ts:

test('GoogleMapsOverlay#draw tolerates a zero-width vector map', async () => {
  const map = new mapsApi.Map({
    width: 0,
    height: 600,
    longitude: -122.45,
    latitude: 37.78,
    zoom: 13,
    renderingType: mapsApi.RenderingType.VECTOR
  });
  let resolveDeviceInitialized = () => {};
  const deviceInitialized = new Promise<void>(resolve => {
    resolveDeviceInitialized = resolve;
  });
  const overlay = new GoogleMapsOverlay({
    device,
    interleaved: false,
    onDeviceInitialized: () => resolveDeviceInitialized(),
    layers: [
      new ScatterplotLayer({
        data: [{position: [-122.45, 37.78]}],
        getPosition: datum => datum.position,
        radiusMinPixels: 10
      })
    ]
  });

  overlay.setMap(map);
  await deviceInitialized;

  try {
    expect(() => map.draw()).not.toThrow();
  } finally {
    overlay.finalize();
  }
});

Run:

yarn vitest run --project=headless test/modules/google-maps/google-maps-overlay.spec.ts -t "zero-width vector map"

The test logs deck: Pixel project matrix not invertible and fails with TypeError: Cannot read properties of null (reading '0').

I also ran the mounted overlay through 800x600, 800x0, 0x0, 0x600, and back to 800x600. The current code accepts the zero-height and fully hidden states, then throws at 0x600.

The current calculation guards the height only:

const aspect = height ? width / height : 1;

Guarding both dimensions prevents the invalid projection:

const aspect = width > 0 && height > 0 ? width / height : 1;

After this change, all five size transitions succeed. All 11 tests in google-maps-overlay.spec.ts, including the regression test, pass on 9.3.10 and current master.

Environment

• Framework version: deck.gl 9.3.10 and master at 4059257667f07b379f4c5f019eb88ea20260d5c5
• Browser: Chromium 147 through deck.gl's headless Vitest project
• OS: macOS

Logs

deck: Pixel project matrix not invertible
TypeError: Cannot read properties of null (reading '0')