public FreeImage(Bitmap bitmap, ImageFormat imageFormat)
{
FreeImageFormat fif = ImageFormatToFIF(imageFormat);
if (fif == FreeImageFormat.Unknown)
{
throw new Exception("Image format \"" + imageFormat.ToString() + "\" is not supported");
}
MemoryStream ms = new MemoryStream();
bitmap.Save(ms, imageFormat);
ms.Flush();
byte[] buffer = new byte[((int)(ms.Length - 1)) + 1];
ms.Position = 0;
ms.Read(buffer, 0, (int)ms.Length);
ms.Close();
IntPtr dataPtr = Marshal.AllocHGlobal(buffer.Length);
Marshal.Copy(buffer, 0, dataPtr, buffer.Length);
m_MemPtr = FreeImageApi.OpenMemory(dataPtr, buffer.Length);
m_Handle = FreeImageApi.LoadFromMemory(fif, m_MemPtr, 0);
}