SharpDX DirectWrite повернуть текст

Вы можете использовать Transformation Matrix< /a> а точнее - a преобразование вращения через матрицу 3x2.

псевдопример:

RenderTarget2D.BeginDraw;
try
  // your regular drawings
  ....

  // save the current tranform
  currentTransform = RenderTarget2D.GetTransform;

  // set a 90 degree rotation around the (100,100);
  RenderTarget2D.SetTransform(Matrix3x2F.Rotation(90, Point2F(100,100))); 

  // do your rotated text drawings
  RenderTarget2D.DrawText();

  // restore your previous/original transform
  RenderTarget2D.SetTransform(currentTransform);
finally
  RenderTarget2D.EndDraw;
end;