/// <summary>
/// Constructor initialized with the bitmap header info
/// </summary>
/// <param name="headerInfo">Bitmap header info</param>
public FileHeader(Stream stream)
{
if (stream == null)
{
throw new ArgumentNullException("headerInfo");
}
byte[] fileHeader = new byte[18];
if (stream.Read(fileHeader, 0, fileHeader.Length) < fileHeader.Length)
{
throw new InvalidOperationException("Unable to read bitmap file header, less than 18bytes read.");
}
Type = (HeaderField)BitConverter.ToUInt16(fileHeader, 0);
Size = BitConverter.ToUInt32(fileHeader, 2);
Reserved = BitConverter.ToUInt32(fileHeader, 6);
BitmapOffset = BitConverter.ToUInt32(fileHeader, 10);
HeaderSize = (HeaderType)BitConverter.ToUInt32(fileHeader, 14);
switch (HeaderSize)
{
case HeaderType.BITMAPCOREHEADER:
_bitmapCoreHeader = new BitmapCoreHeader(stream);
break;
case HeaderType.BITMAPINFOHEADER:
case HeaderType.BITMAPCOREHEADER2:
case HeaderType.BITMAPV2INFOHEADER:
case HeaderType.BITMAPV3INFOHEADER:
case HeaderType.BITMAPV4HEADER:
case HeaderType.BITMAPV5HEADER:
BitmapInfoHeader infoHeader = new BitmapInfoHeader(stream);
_bitmapCoreHeader = infoHeader;
if (infoHeader.CompressionType == CompressionType.BI_BITFIELDS ||
infoHeader.CompressionType == CompressionType.BI_ALPHABITFIELDS)
{
BitMask = new BitMask(HeaderSize, infoHeader.CompressionType, stream);
}
break;
}
}
/// <summary>
/// Constructor initialized with the bitmap header info
/// </summary>
/// <param name="headerInfo">Bitmap header info</param>
public FileHeader(Stream stream)
{
if(stream == null)
throw new ArgumentNullException("headerInfo");
byte[] fileHeader = new byte[18];
if(stream.Read(fileHeader, 0, fileHeader.Length) < fileHeader.Length)
throw new InvalidOperationException("Unable to read bitmap file header, less than 18bytes read.");
Type = (HeaderField)BitConverter.ToUInt16(fileHeader, 0);
Size = BitConverter.ToUInt32(fileHeader, 2);
Reserved = BitConverter.ToUInt32(fileHeader, 6);
BitmapOffset = BitConverter.ToUInt32(fileHeader, 10);
HeaderSize = (HeaderType)BitConverter.ToUInt32(fileHeader, 14);
switch (HeaderSize)
{
case HeaderType.BITMAPCOREHEADER:
_bitmapCoreHeader = new BitmapCoreHeader(stream);
break;
case HeaderType.BITMAPINFOHEADER:
case HeaderType.BITMAPCOREHEADER2:
case HeaderType.BITMAPV2INFOHEADER:
case HeaderType.BITMAPV3INFOHEADER:
case HeaderType.BITMAPV4HEADER:
case HeaderType.BITMAPV5HEADER:
BitmapInfoHeader infoHeader = new BitmapInfoHeader(stream);
_bitmapCoreHeader = infoHeader;
if(infoHeader.CompressionType == CompressionType.BI_BITFIELDS
|| infoHeader.CompressionType == CompressionType.BI_ALPHABITFIELDS)
BitMask = new BitMask(HeaderSize, infoHeader.CompressionType, stream);
break;
}
}
