Method requestImage

app/src/Misc/IconEngine.cpp:244–278

* @brief Decodes a base64-encoded SVG and renders it to a QImage. */

 * @brief Decodes a base64-encoded SVG and renders it to a QImage.
 */
QImage Misc::ActionIconProvider::requestImage(const QString& id,
                                              QSize* size,
                                              const QSize& requestedSize)
{
  const auto svgData = QByteArray::fromBase64(id.toLatin1());
  if (svgData.isEmpty()) {
    if (size)
      *size = QSize(0, 0);

    return {};
  }

  QSvgRenderer renderer(svgData);
  if (!renderer.isValid()) {
    if (size)
      *size = QSize(0, 0);

    return {};
  }

  const int w = requestedSize.width() > 0 ? requestedSize.width() : 64;
  const int h = requestedSize.height() > 0 ? requestedSize.height() : 64;

  QImage image(w, h, QImage::Format_ARGB32_Premultiplied);
  image.fill(Qt::transparent);

  QPainter painter(&image);
  renderer.render(&painter);
  painter.end();

  if (size)
    *size = image.size();

  return image;
}