Function resetScreen

src/ink/screen.ts:501–544

(
  screen: Screen,
  width: number,
  height: number,
)

 * without allocating new Screen objects each frame.
 */
export function resetScreen(
  screen: Screen,
  width: number,
  height: number,
): void {
  // Warn if dimensions are not valid integers
  warn.ifNotInteger(width, 'resetScreen width')
  warn.ifNotInteger(height, 'resetScreen height')

  // Ensure width and height are valid integers to prevent crashes
  if (!Number.isInteger(width) || width < 0) {
    width = Math.max(0, Math.floor(width) || 0)
  }
  if (!Number.isInteger(height) || height < 0) {
    height = Math.max(0, Math.floor(height) || 0)
  }

  const size = width * height

  // Resize if needed (only grow, to avoid reallocations)
  if (screen.cells64.length < size) {
    const buf = new ArrayBuffer(size << 3)
    screen.cells = new Int32Array(buf)
    screen.cells64 = new BigInt64Array(buf)
    screen.noSelect = new Uint8Array(size)
  }
  if (screen.softWrap.length < height) {
    screen.softWrap = new Int32Array(height)
  }

  // Reset all cells — single fill call, no loop
  screen.cells64.fill(EMPTY_CELL_VALUE, 0, size)
  screen.noSelect.fill(0, 0, size)
  screen.softWrap.fill(0, 0, height)

  // Update dimensions
  screen.width = width
  screen.height = height

  // Shared pools accumulate — no clearing needed. Unique char/hyperlink sets are bounded.

  // Clear damage tracking
  screen.damage = undefined
}

/**
 * Re-intern a screen's char and hyperlink IDs into new pools.