private void btnCloseTIFF_Click(object sender, System.EventArgs e)
{
if (tiff == IntPtr.Zero)
{
return;
}
// reset handle, text fields
LibTIFF.Close(tiff);
tiff = (IntPtr)0;
tbTIFFPtr.Text = tiff.ToString();
tbRasterScanlineSize.Text = "";
tbScanlineSize.Text = "";
tbImageDimensions.Text = "";
tbTileDimensions.Text = "";
tbBitsPerSample.Text = "";
tbRowsPerStrip.Text = "";
tbSamplesPerPixel.Text = "";
tbInitialScan0Ptr.Text = "";
tbLastScan0Ptr.Text = "";
tbContrastingTime.Text = "";
// free bitmat data
BitmapData bmpData = ((Bitmap)pbPicture.Image).LockBits(
new Rectangle(0, 0, pbPicture.Image.Width, pbPicture.Image.Height),
ImageLockMode.ReadWrite,
PixelFormat.Format8bppIndexed);
LibTIFF._free(bmpData.Scan0);
((Bitmap)pbPicture.Image).UnlockBits(bmpData);
// dispose and clear Bitmap object
pbPicture.Image.Dispose();
pbPicture.Image = null;
}
private void tbCreateTIFF_Click(object sender, System.EventArgs e)
{
if (sfdCreateTIFF.ShowDialog() != DialogResult.OK)
{
return;
}
DateTime startTime = DateTime.Now;
// image size
int width = 1024 * Convert.ToInt16(tbSizeFactorX.Text);
int height = 1024 * Convert.ToInt16(tbSizeFactorY.Text);
short rowsPerStrip = (short)height;
// create file
IntPtr newTiff = LibTIFF.Open(sfdCreateTIFF.FileName, "w");
IntPtr pBuffer;
if (chkSaveStrips.Checked)
{
rowsPerStrip = Convert.ToInt16(tbSaveRowsPerStrip.Text);
}
// set required tag. WATCH THE TYPES!!!
LibTIFF.SetField(newTiff, (int)TIFFTags.TIFFTAG_IMAGEWIDTH, (short)width);
LibTIFF.SetField(newTiff, (int)TIFFTags.TIFFTAG_IMAGELENGTH, (short)height);
LibTIFF.SetField(newTiff, (int)TIFFTags.TIFFTAG_BITSPERSAMPLE, (int)16);
LibTIFF.SetField(newTiff, (int)TIFFTags.TIFFTAG_SAMPLESPERPIXEL, (short)1);
LibTIFF.SetField(newTiff, (int)TIFFTags.TIFFTAG_ROWSPERSTRIP, (short)rowsPerStrip);
LibTIFF.SetField(newTiff, (int)TIFFTags.TIFFTAG_PHOTOMETRIC, (short)TIFFTags.PHOTOMETRIC_MINISBLACK);
LibTIFF.SetField(newTiff, (int)TIFFTags.TIFFTAG_PLANARCONFIG, (short)TIFFTags.PLANARCONFIG_CONTIG);
if (chkSaveStrips.Checked)
{
// write strips
pBuffer = LibTIFF._malloc(width * 2 * rowsPerStrip);
// assume raw data to be provided as short[]
short[] shortbits = new short[width * rowsPerStrip];
// strips
int strips = height / rowsPerStrip;
for (int strip = 0; strip < strips; strip++)
{
for (int y = 0; y < rowsPerStrip; y++)
{
// pixels in line: set to specific gray value
for (int x = 0; x < width; x++)
{
// short = -32,768 to 32,767 = signed 16-bit integer
// ushort is not supported by Marshal.Copy
shortbits[y * width + x] = (short)(10 * y);
}
}
// copy data to unsafe context
Marshal.Copy(shortbits, 0, pBuffer, width * rowsPerStrip);
// ... and write to file
int ret = LibTIFF.WriteRawStrip(newTiff, (uint)strip, pBuffer, width * 2 * rowsPerStrip);
if (ret == -1)
{
Console.WriteLine("writing strip " + strip + " returned " + ret);
}
}
}
else
{
// write scanline by scanline
pBuffer = LibTIFF._malloc(width * 2); // 16 bpp
// assume raw data to be provided as short[]
short[] shortbits = new short[width];
// lines
for (int y = 0; y < height; y++)
{
// pixels in line: set to specific gray value
for (int x = 0; x < width; x++)
{
// short = -32,768 to 32,767 = signed 16-bit integer
// ushort is not supported by Marshal.Copy
shortbits[x] = (short)(100 * y);
}
// copy data to unsafe context
Marshal.Copy(shortbits, 0, pBuffer, width);
// ... and write to file
if (!LibTIFF.WriteScanline(newTiff, pBuffer, (uint)y))
{
Console.WriteLine("writing line " + y + " failed.");
}
}
}
LibTIFF._free(pBuffer);
LibTIFF.Close(newTiff);
MessageBox.Show("Time: " + (DateTime.Now - startTime));
}
