Function AdjustFirstBaseLine

exporter/src/export/data/TextProperty.cpp:541–571

}

static void AdjustFirstBaseLine(pag::TextDocumentHandle textDocument, bool hasBias) {
  if (textDocument->boxTextSize.x <= 0.001f || textDocument->boxTextSize.y <= 0.001f) {
    textDocument->firstBaseLine = 0.0f;
    return;
  }

  if (textDocument->direction == pag::TextDirection::Vertical) {
    auto rightLine = textDocument->boxTextPos.x + textDocument->boxTextSize.x;
    float fontHeight = rightLine + textDocument->firstBaseLine;

    bool needToAdjust = hasBias || fontHeight < textDocument->fontSize / 3.0f ||
                        fontHeight > textDocument->fontSize;
    if (needToAdjust) {
      float newHeight = textDocument->fontSize * 0.4f;
      textDocument->fontSize = rightLine - newHeight;
    }
  } else {
    float fontHeight = textDocument->firstBaseLine - textDocument->boxTextPos.y;
    bool needToAdjust = hasBias || fontHeight < textDocument->fontSize * 0.2f ||
                        fontHeight > textDocument->fontSize;
    if (needToAdjust) {
      float ascend = 0.0f;
      float descent = 0.0f;
      pag::CalculateTextAscentAndDescent(textDocument.get(), &ascend, &descent);

      auto factor = -ascend / (descent - ascend);
      float newHeight = textDocument->fontSize * factor * 0.9f;
      textDocument->firstBaseLine = textDocument->boxTextPos.y + newHeight;
    }
  }
}

static void GetFirstBaseLineByPos(pag::TextDocumentHandle textDocument,
                                  std::vector<pag::TextAnimator*>* animators, pag::Frame frame) {