Method onEnter

src/activities/util/BmpViewerActivity.cpp:59–138

}

void BmpViewerActivity::onEnter() {
  Activity::onEnter();

  if (siblingImages.empty() && !filePath.empty()) {
    loadSiblingImages();
  }

  HalFile file;

  const auto pageWidth = renderer.getScreenWidth();
  const auto pageHeight = renderer.getScreenHeight();
  Rect popupRect = GUI.drawPopup(renderer, tr(STR_LOADING_POPUP));
  GUI.fillPopupProgress(renderer, popupRect, 20);  // Initial 20% progress
  // 1. Open the file
  if (Storage.openFileForRead("BMP", filePath, file)) {
    Bitmap bitmap(file, true);

    // 2. Parse headers to get dimensions
    if (bitmap.parseHeaders() == BmpReaderError::Ok) {
      int x, y;

      if (bitmap.getWidth() > pageWidth || bitmap.getHeight() > pageHeight) {
        float ratio = static_cast<float>(bitmap.getWidth()) / static_cast<float>(bitmap.getHeight());
        const float screenRatio = static_cast<float>(pageWidth) / static_cast<float>(pageHeight);

        if (ratio > screenRatio) {
          // Wider than screen
          x = 0;
          y = std::round((static_cast<float>(pageHeight) - static_cast<float>(pageWidth) / ratio) / 2);
        } else {
          // Taller than screen
          x = std::round((static_cast<float>(pageWidth) - static_cast<float>(pageHeight) * ratio) / 2);
          y = 0;
        }
      } else {
        // Center small images
        x = (pageWidth - bitmap.getWidth()) / 2;
        y = (pageHeight - bitmap.getHeight()) / 2;
      }

      // 4. Prepare Rendering
      bool hasPrevious = (siblingImages.size() > 1 && currentImageIndex > 0);
      bool hasNext = (siblingImages.size() > 1 && currentImageIndex != -1 &&
                      currentImageIndex < static_cast<int>(siblingImages.size()) - 1);

      const auto labels =
          mappedInput.mapLabels(tr(STR_BACK), tr(STR_SET_SLEEP_COVER), (hasPrevious ? "<" : ""), (hasNext ? ">" : ""));

      GUI.fillPopupProgress(renderer, popupRect, 50);

      renderer.clearScreen();
      // Assuming drawBitmap defaults to 0,0 crop if omitted, or pass explicitly: drawBitmap(bitmap, x, y, pageWidth,
      // pageHeight, 0, 0)
      renderer.drawBitmap(bitmap, x, y, pageWidth, pageHeight, 0, 0);

      // Draw UI hints on the base layer
      GUI.drawButtonHints(renderer, labels.btn1, labels.btn2, labels.btn3, labels.btn4);
      // Single pass for non-grayscale images