/// <summary>
/// 旋转图片
/// </summary>
/// <param name="vRotate">旋转角度</param>
public void RotateImage(double vRotate)
{
if (isBitmap)
{
// Create a temporary rescaled bitmap
using (FreeImageBitmap temp = bitmap.GetScaledInstance(resultbmp.Width, resultbmp.Height, FREE_IMAGE_FILTER.FILTER_CATMULLROM))
{
if (temp != null)
{
// Rotate the bitmap
temp.Rotate(vRotate);
if (resultbmp != null)
{
resultbmp.Dispose();
}
// Display the result
resultbmp = (Bitmap)temp;
}
}
}
}
private void bRotate_Click(object sender, EventArgs e)
{
if (Bitmap)
{
// Create a temporary rescaled bitmap
using (FreeImageBitmap temp = bitmap.GetScaledInstance(
pictureBox.DisplayRectangle.Width, pictureBox.DisplayRectangle.Height,
FREE_IMAGE_FILTER.FILTER_CATMULLROM))
{
if (temp != null)
{
// Rotate the bitmap
temp.Rotate((double)vRotate.Value);
if (pictureBox.Image != null)
{
pictureBox.Image.Dispose();
}
// Display the result
pictureBox.Image = (Bitmap)temp;
}
}
}
}