/// <summary>
/// Writes initial file
/// </summary>
public void CreateSwapFile()
{
// Instrumentation
DateTime tStart = DateTime.Now;
Close();
m_fs = File.Open(m_name, FileMode.Create, FileAccess.ReadWrite, FileShare.Read);
m_fs.Write(TIFHeader, 0, TIFHeader.Length);
byte[] buff = new byte[RowSize];
byte[] bk = Slide.GetColorBytes(m_bkColor);
for (uint i = 0; i < buff.Length; i += 3)
{
buff[i] = bk[0];
buff[i + 1] = bk[1];
buff[i + 2] = bk[2];
}
for (uint i = 0; i < m_y; i++)
{
m_fs.Write(buff, 0, buff.Length);
}
m_fs.Flush();
// Instrumentation
TimeSpan ts = DateTime.Now.Subtract(tStart);
WriteInstrumentationMessage("Swap file creation done: " +
ts.TotalSeconds.ToString("0.000") + " sec (" + m_fs.Length.ToString("0") + " bytes)");
}
/// <summary>
/// inserts the bitmap to file
/// </summary>
public bool SetBitmap(Bitmap b, int x, int y, bool preserveBitmap)
{
// Instrumentation
WriteInstrumentationMessage("Bitmap pushed: at ["
+ x.ToString("0") + "," + y.ToString("0") + "], size ["
+ b.Width.ToString("0") + "," + b.Height.ToString("0") + "]");
DateTime tStart = DateTime.Now;
bool ReadPerformed = false;
// Decide how much of the file has to be pasted
int x1 = x;
int dx1 = b.Width;
int xOrigin = 0;
if (ComputeLimits(ref x1, ref dx1, ref xOrigin, m_x))
{
return(false);
}
int y1 = y;
int dy1 = b.Height;
int yOrigin = 0;
if (ComputeLimits(ref y1, ref dy1, ref yOrigin, m_y))
{
return(false);
}
// Decide the start and the end of the buffer to be read
// Note that in bmp files the rows are up side down
uint rs = RowSize;
long bufferStart = TIFHeader.Length + (long)(y1) * (long)(rs);
int bufferSize = (int)(rs * dy1);
if (m_buffer == null || m_buffer.Length != bufferSize || !preserveBitmap)
{
m_buffer = new byte[bufferSize];
if (dx1 < m_x) // need to fetch the unaffected areas
{
ReadPerformed = true;
m_fs.Seek(bufferStart, SeekOrigin.Begin);
m_fs.Read(m_buffer, 0, m_buffer.Length);
}
}
// Fill image to the buffer
for (int j = 0; j < dy1; j++)
{
int offset = j * (int)rs + x1 * 3;
for (int i = 0, k = offset; i < dx1; i++, k += 3)
{
byte[] bb = Slide.GetColorBytes(b.GetPixel(xOrigin + i, yOrigin + j));
m_buffer[k] = bb[0];
m_buffer[k + 1] = bb[1];
m_buffer[k + 2] = bb[2];
}
}
m_fs.Seek(bufferStart, SeekOrigin.Begin);
m_fs.Write(m_buffer, 0, m_buffer.Length);
m_fs.Flush();
// Instrumentation
TimeSpan ts = DateTime.Now.Subtract(tStart);
int pix = b.Width * b.Height;
WriteInstrumentationMessage("Bitmap saved: at ["
+ x1.ToString("0") + "," + y1.ToString("0") + "], size ["
+ dx1.ToString("0") + "," + dy1.ToString("0") + "] in "
+ ts.TotalSeconds.ToString("0.000") + " sec (" + pix.ToString("0") + " pixels)");
return(ReadPerformed);
}
