Method displayGrayscaleBase

lib/hal/HalDisplay.cpp:84–97

}

void HalDisplay::displayGrayscaleBase(RefreshMode fallback, bool turnOffScreen) {
  // X3: a HALF fallback means the caller wants a clean base (e.g. the sleep
  // cover, a full-screen swap from arbitrary prior content). Without this, the
  // X3 grayscale base takes its gentle differential happy path and the prior
  // home/reader frame ghosts through the soft aa_pre_bw_mid waveform. Forcing a
  // resync makes displayGrayscaleBase clear first, matching displayBuffer(HALF).
  // The reader's FAST path is deliberately left on the differential path so
  // per-page grayscale stays cheap.
  if (gpio.deviceIsX3() && fallback == RefreshMode::HALF_REFRESH) {
    einkDisplay.requestResync(1);
  }

  einkDisplay.displayGrayscaleBase(convertRefreshMode(fallback), turnOffScreen);
}

void HalDisplay::preconditionGrayscale() { einkDisplay.preconditionGrayscale(); }