Method GetGradientColorsFromFileBytes

exporter/src/utils/PAGExportSession.cpp:85–150

}

pag::GradientColorHandle PAGExportSession::GetGradientColorsFromFileBytes(
    const std::vector<std::string>& matchNames, int index, int keyFrameIndex) {
  if (fileBytes.empty()) {
    fileBytes = GetProjectFileBytes();
  }
  if (fileBytes.empty()) {
    return GetDefaultGradientColors();
  }

  ByteArray bytes(reinterpret_cast<uint8_t*>(fileBytes.data()), fileBytes.size());
  bytes = ReadBody(&bytes);
  auto compositions = ReadCompositions(&bytes);

  ByteArray layerBytes = {};
  for (auto& composition : compositions) {
    if (composition.id == static_cast<int>(compID)) {
      auto layers = ReadLayers(&composition.bytes);
      for (const auto& layer : layers) {
        if (static_cast<pag::ID>(layer.id) == layerID) {
          layerBytes = layer.bytes;
          break;
        }
      }
      break;
    }
  }

  if (layerBytes.empty()) {
    return GetDefaultGradientColors();
  }

  std::string gradientText;
  for (int i = 0; layerBytes.bytesAvailable() > 0 && i <= index; ++i) {
    auto groupTag = ReadFirstGroupByMatchNames(&layerBytes, matchNames);
    if (groupTag.bytes.empty()) {
      break;
    }

    if (i == index) {
      auto tag = ReadFirstTagByName(&groupTag.bytes, "GCky");
      if (tag.bytes.empty()) {
        break;
      }

      int frameIndex = 0;
      while (tag.bytes.bytesAvailable()) {
        auto stringTag = ReadTag(&tag.bytes);
        if (stringTag.bytes.empty()) {
          break;
        }
        if (frameIndex == keyFrameIndex) {
          if (!stringTag.bytes.empty() && stringTag.bytes.bytesAvailable() > 0) {
            if (stringTag.bytes.position() < stringTag.bytes.length()) {
              gradientText = stringTag.bytes.readUTF8String();
            }
          }
          break;
        }