public CanonBitmap readBitmap(CanonHeader header, int width, int height)
{
CanonBitmap bmp;
if (width <= 0 || height <= 0)
{
throw new BitmapSizeException("width and height must be > 0");
}
int size = width * height;
int padding = (size + CanonHeader.SIZE) % (byte)_byteAlign == 0 ? 0 : (byte)_byteAlign - (size + CanonBitmapHeader.SIZE) % (byte)_byteAlign;
//Console.WriteLine("trying to read {0} bytes, {0}%{1}={2} -> padding {3} bytes (pad_to {4})",
// size, CanonBitmapHeader.SIZE, (size + CanonBitmapHeader.SIZE) % (byte)_byteAlign, padding, _byteAlign);
byte[] data = new byte[size + padding];
if (_dataFile.Read(data, 0, size + padding) != (size + padding))
{
throw new EndOfStreamException("cannot read the whole bitmap data (EOF?)");
}
bmp = new CanonBitmap(header, data);
bmp.Width = width;
bmp.Height = height;
return(bmp);
}
public CanonBitmap(byte[] data, long origin)
{
if (data.Length <= 0)
{
throw new Exception("no data");
}
if (data.Length < CanonBitmapHeader.SIZE)
{
throw new Exception("too few data (no header)");
}
byte[] headerData = new byte[CanonBitmapHeader.SIZE];
Array.Copy(data, headerData, CanonBitmapHeader.SIZE);
this.header = new CanonBitmapHeader(headerData, origin);
byte[] imageData = new byte[data.Length - CanonBitmapHeader.SIZE];
Array.Copy(data, CanonBitmapHeader.SIZE, imageData, 0, data.Length - CanonBitmapHeader.SIZE);
this.data = imageData;
if (this.header.Value1 <= 0)
{
throw new Exception("invalid width (<=0)");
}
this.width = this.header.Value1;
this.height = (byte)(this.data.Length / this.width);
}
/// <summary>
/// Read the bitmap on the current position and adds the passed header.
/// </summary>
/// <param name="header"></param>
/// <returns></returns>
public CanonBitmap readBitmap(CanonHeader header)
{
if (header is CanonBitmapHeader)
{
return(readBitmap(header, header.Value1, DEFAULT_HEIGHT));
}
else if (header is CanonBigBitmapHeader)
{
return(readBitmap(header, header.Value1, header.Value2));
}
// should not happen
return(null);
}
public CanonBitmap(CanonHeader header, byte[] data)
{
if (header == null)
{
throw new NullReferenceException("header must not be null");
}
if (data.Length <= 0)
{
throw new Exception("no data");
}
if (header.Value1 <= 0)
{
throw new Exception("invalid width (<=0)");
}
this.header = header;
this.data = data;
this.Width = header.Value1;
this.Height = (byte)(data.Length / this.Width);
}
private void printBitmapHeader(CanonHeader header)
{
string hInfo = "header hex / dec: {0:X2} {1:X2} / {0} {1}";
lblBitmapHeader.Text = String.Format(hInfo, header.Value1, header.Value2);
}
