/// <summary>
/// An existing bitmap file.
/// </summary>
/// <param name="filename">A file in a .bmp format.</param>
public BitmapFile(string filename)
{
byte[] data = File.ReadAllBytes(filename);
IntPtr pFileHeaderData = Marshal.AllocHGlobal(Marshal.SizeOf(_header));
try
{
Marshal.Copy(data, 0, pFileHeaderData, Marshal.SizeOf(_header));
_header = (Gdi32.BITMAPFILEHEADER)Marshal.PtrToStructure(
pFileHeaderData, typeof(Gdi32.BITMAPFILEHEADER));
}
finally
{
Marshal.FreeHGlobal(pFileHeaderData);
}
Int32 size = data.Length - Marshal.SizeOf(_header);
byte[] bitmapData = new byte[size];
Buffer.BlockCopy(data, Marshal.SizeOf(_header), bitmapData, 0, size);
_bitmap = new DeviceIndependentBitmap(bitmapData);
}
/// <summary>
/// An existing bitmap file.
/// </summary>
/// <param name="filename">A file in a .bmp format.</param>
public BitmapFile(string filename)
{
byte[] data = File.ReadAllBytes(filename);
IntPtr pFileHeaderData = Marshal.AllocHGlobal(Marshal.SizeOf(_header));
try
{
Marshal.Copy(data, 0, pFileHeaderData, Marshal.SizeOf(_header));
_header = (Gdi32.BITMAPFILEHEADER)Marshal.PtrToStructure(
pFileHeaderData, typeof(Gdi32.BITMAPFILEHEADER));
}
finally
{
Marshal.FreeHGlobal(pFileHeaderData);
}
Int32 size = data.Length - Marshal.SizeOf(_header);
byte[] bitmapData = new byte[size];
Buffer.BlockCopy(data, Marshal.SizeOf(_header), bitmapData, 0, size);
_bitmap = new DeviceIndependentBitmap(bitmapData);
}