function getRenderPixel(event, pixel) {
  return applyTransform(event.inversePixelTransform, pixel.slice(0));
}
Gets the pixel of the event's canvas context from the map viewport's CSS pixel.
@param {import("./render/Event.js").default} event Render event.
@param {import("./pixel.js").Pixel} pixel CSS pixel relative to the top-left
corner of the map viewport.
@return {import("./pixel.js").Pixel} Pixel on the event's canvas context.
@api