Method renderPage

src/activities/reader/TxtReaderActivity.cpp:353–413

}

void TxtReaderActivity::renderPage() {
  const int lineHeight = renderer.getLineHeight(cachedFontId);
  const int contentWidth = viewportWidth;

  // Render text lines with alignment
  auto renderLines = [&]() {
    int y = cachedOrientedMarginTop;
    for (const auto& line : currentPageLines) {
      if (!line.empty()) {
        int x = cachedOrientedMarginLeft;
        const bool lineIsRtl = BidiUtils::startsWithRtl(line.c_str(), BidiUtils::RTL_PARAGRAPH_PROBE_DEPTH);
        uint8_t effectiveAlignment = cachedParagraphAlignment;
        if (lineIsRtl && (effectiveAlignment == CrossPointSettings::LEFT_ALIGN ||
                          effectiveAlignment == CrossPointSettings::JUSTIFIED)) {
          effectiveAlignment = CrossPointSettings::RIGHT_ALIGN;
        }
        const int textWidth = renderer.getTextAdvanceX(cachedFontId, line.c_str(), EpdFontFamily::REGULAR);

        // Apply text alignment
        switch (effectiveAlignment) {
          case CrossPointSettings::LEFT_ALIGN:
          default:
            // x already set to left margin
            break;
          case CrossPointSettings::CENTER_ALIGN: {
            x = cachedOrientedMarginLeft + (contentWidth - textWidth) / 2;
            break;
          }
          case CrossPointSettings::RIGHT_ALIGN: {
            x = cachedOrientedMarginLeft + contentWidth - textWidth;
            break;
          }
          case CrossPointSettings::JUSTIFIED:
            // For plain text, justified is treated as left-aligned
            // (true justification would require word spacing adjustments)
            break;
        }

        renderer.drawText(cachedFontId, x, y, line.c_str());
      }
      y += lineHeight;
    }
  };

  // Font prewarm: scan pass accumulates text, then prewarm, then real render
  auto* fcm = renderer.getFontCacheManager();
  auto scope = fcm->createPrewarmScope();
  renderLines();  // scan pass — text accumulated, no drawing
  scope.endScanAndPrewarm();

  // BW rendering
  renderLines();
  renderStatusBar();

  ReaderUtils::displayWithRefreshCycle(renderer, pagesUntilFullRefresh);

  if (SETTINGS.textAntiAliasing) {
    ReaderUtils::renderAntiAliased(renderer, [&renderLines]() { renderLines(); });