Support for TIF Format

By: swami - shakai2k
Support for TIF Format
2002-11-10 18:51
Hi All

Is there anyway I can use TIF images for the Images, I am trying to use Tif images but unfortunately its not displaying. iText supports Tif Images by using the SUN API for Advanced Imaging(in short JAI). Please help me in this.

Any help in getting this thing going will be greatly appreciated.

Thanks

Swami


By: Teodor Danciu - teodord
RE: Support for TIF Format
2002-11-11 13:29

Hi,

I'm not familliar with this JAI API,
but why I imagine it can load TIF files into
java.awt.Image objects.

If so, why is it that you cannot use this library
to load images in JasperReports.
You can make calls to this library in the report
image expression itself, or you can pass the image
as a java.awt.Image parameter to you report, in
case you load it in the parent application.

Note that you can use in report expression any
class you might want to, as long as you reference
it using its entire name (inlcluding the package) and
you put it in the classpath when compiling and
filling the report.

I hope this helps.
Teodor



By: swami - shakai2k
RE: Support for TIF Format
2002-11-12 09:29
I tried doing using JAI the Tiff's that I have are compressed using LZW compression and the only way I can get around with this uncompress it using JAI, but the compression format must be passed into the iText Image so as to build it. Is there anyway I can set the type of compression for the Tiff Image.

The other thing is an Image Expression takes only the following formats:

java.lang.String
java.net.URL
java.io.InputStream
java.awt.Image

So I think if i can pass an java.lang.Object into the Image Expression and the compression format, I will be able get around this problem.

Thanks

swami


By: Paulo Soares - psoares33
RE: Support for TIF Format
2002-11-12 10:02
You can let JAI do all the work and pass to iText a java.awt.Image. See http://sourceforge.net/mailarchive/message.php?msg_id=2358954.


By: swami - shakai2k
RE: Support for TIF Format
2002-11-12 17:18
Thank you all for your help. I had figured out how to use TIFFs in Jasper.

The following is the explanation of how you can do it

Use the SUN Java Advanced Imaging Library, you can get it from :

http://java.sun.com/products/java-media/jai/downloads/download.html

and this must help you convert the TIF image to an awt Image and which can be passed into Jasper Reports :

ByteArraySeekableStream stream = new ByteArraySeekableStream(binaryData);

ParameterBlock params = new ParameterBlock();
params.add(stream);
// Specify to TIFF decoder to decode images as they are and
// not to convert unsigned short images to byte images.
TIFFDecodeParam decodeParam = new TIFFDecodeParam();
decodeParam.setDecodePaletteAsShorts(true);
// Store the decode parameters in a RenderingHints to be sent
// to the operation registry, and eventually to the TIFF decoder.
RenderingHints hints = new RenderingHints(JAI.KEY_TILE_DECODING_PARAM,decodeParam);
// Create an operator to decode the TIFF file.
RenderedOp image1 = JAI.create("tiff", params, hints);
// Find out the first image's data type.
int dataType = image1.getSampleModel().getDataType();
RenderedOp image2 = null;
if (dataType == DataBuffer.TYPE_BYTE)
{
// Display the byte image as it is.
log.debug("TIFF image is type byte.");
image2 = image1;
}
else if (dataType == DataBuffer.TYPE_USHORT)
{
// Convert the unsigned short image to byte image.
log.debug("TIFF image is type ushort.");
// Setup a standard window-level lookup table. */
byte[] tableData = new byte[0x10000];
for (int i = 0; i < 0x10000; i++)
{
tableData = (byte)(i >> 8);
}
// Create a LookupTableJAI object to be used with the
// "lookup" operator.
LookupTableJAI table = new LookupTableJAI(tableData);
// Create an operator to lookup image1.
image2 = JAI.create("lookup", image1, table);
}
else
{
log.debug("TIFF image is type " + dataType +", and will not be displayed.");
}
// Attach image2 to a scrolling panel to be displayed.
BufferedImage bi = new BufferedImage(image2.getColorModel(),image2.copyData(), false, new Hashtable());