message: Add SGR 9, crossed out, decoration renderer.
diff: @@ -203,7 +203,23 @@ void DecorationRenderer::rebuild()
  move(image)
  );
  } // }}}
  - // TODO: CrossedOut
  + { // {{{ crossed-out
  + auto const middleCell = screenCoordinates_.cellHeight / 2;
  + auto const thickness = max(lineThickness_ * baseline / 3, 1u);
  + auto image = atlas::Buffer(width * middleCell, 0u);
  +
  + for (unsigned y = 0; y < thickness; ++y)
  + for (unsigned x = 0; x < width; ++x)
  + image[y * width + x] = 0xFF;
  +
  + atlas_.insert(
  + Decorator::CrossedOut,
  + width, middleCell - thickness / 2,
  + width, middleCell - thickness / 2,
  + GL_RED,
  + move(image)
  + );
  + } // }}}
  // TODO: Framed
  // TODO: Encircle
  }
  