/// <summary>
/// Rotate and/or flip bitmap
/// </summary>
/// <param name="bitmap">Image</param>
/// <param name="type">Operation</param>
/// <returns>Modified bitmap</returns>
static public Bitmap RotateFlip(Bitmap bitmap, RotationAngle angle, FlipAxis axis)
{
if (bitmap == null)
{
throw new ArgumentNullException();
}
IBitmapImage image = BitmapToIImageBitmap(bitmap);
try
{
IBitmapImage imageBitmap = BitmapToIImageBitmap(bitmap);
IBasicBitmapOps ops = (IBasicBitmapOps)imageBitmap;
if (angle != 0)
{
ops.Rotate((float)angle, InterpolationHint.InterpolationHintDefault, out imageBitmap);
Marshal.FinalReleaseComObject(ops);
ops = (IBasicBitmapOps)imageBitmap;
}
if (axis != FlipAxis.None)
{
ops.Flip((axis & FlipAxis.X) == FlipAxis.X, (axis & FlipAxis.Y) == FlipAxis.Y, out imageBitmap);
Marshal.FinalReleaseComObject(ops);
ops = (IBasicBitmapOps)imageBitmap;
}
return(IBitmapImageToBitmap(imageBitmap));
}
finally
{
Marshal.FinalReleaseComObject(image);
}
}
/// <summary>
/// Flips image around X and/or Y axes
/// </summary>
/// <param name="bitmap">Image</param>
/// <param name="axis">Axis or axes to flip on</param>
private static Bitmap Flip(IBitmapImage image, FlipAxis axis)
{
Bitmap bmRet;
IBitmapImage imageBitmap;
IBasicBitmapOps ops = (IBasicBitmapOps)image;
ops.Flip((axis & FlipAxis.X) == FlipAxis.X, (axis & FlipAxis.Y) == FlipAxis.Y, out imageBitmap);
try
{
bmRet = IBitmapImageToBitmap(imageBitmap);
}
finally
{
Marshal.FinalReleaseComObject(imageBitmap);
}
return(bmRet);
}
private static Bitmap Rotate(IBitmapImage image, float angle)
{
IBitmapImage imageBitmap;
Bitmap bmRet;
IBasicBitmapOps ops = (IBasicBitmapOps)image;
ops.Rotate(angle, InterpolationHint.InterpolationHintDefault, out imageBitmap);
try
{
bmRet = IBitmapImageToBitmap(imageBitmap);
}
finally
{
Marshal.FinalReleaseComObject(imageBitmap);
}
return(bmRet);
}
