日誌2011-02-01 13:57

C#旋轉圖片

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留言

• 2023-10-06 21:41semmyenator：
  public static Image RotateImage(Image img, float rotationAngle)
  {
  Bitmap bmp = new Bitmap(img.Width, img.Height);
  //Create same-size images.
  
  Graphics gfx = Graphics.FromImage(bmp);
  
  gfx.RotateTransform(rotationAngle);
  //Rotate the image according to the incoming angle.
  
  gfx.TranslateTransform((float)bmp.Width / 2 - img.Width / 2, (float)bmp.Height / 2 - img.Height / 2);
  //Create a rotation point, this line is the center point of the image.
  
  gfx.InterpolationMode = InterpolationMode.HighQualityBicubic;
  //Set InterpolationMode to HighQualityBicubic to ensure that it does not deform after rotation.
  
  gfx.DrawImage(img, new Point(0, 0));
  //Redraw the picture.
  
  gfx.Dispose();
  return bmp;
  }

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