One more thing: The TIFFRenderer currently uses the internal codecs from XML Graphics Commons to encode TIFF images. These do not support writing CCITT-G4 encoded images. We could switch to the ImageWriters I wrote for Batik and which are now available in XML Graphics Commons. They allow an abstraction from the underlying codec for image writing. There are implementations of the ImageWriter that write images through ImageIO which might have CCITT-capable codecs available but the code will have to be extended to choose the compression algorithm. All in all, no easy solution to your requirement but certainly not much more than half a day of work.
On 10.09.2006 12:54:46 Jeremias Maerki wrote: > There's a configuration value you can set to modify the compression used > but it's poorly designed (requiring an integer value) and undocumented. > Furthermore, it does not support setting CCITT-G4 compression. > Generating monochrome (1bit) images has also not been implemented, yet. > > To implement all this, changes would have to be made in: > - Java2DRenderer.getPageImage(): Extract code into a protected method to > instantiate the BufferedImage that we paint on. Right now, it always > allocates an 24 bit RGB image with an 8-bit alpha channel. > - TIFFRenderer.LazyPageImagesIterator.next(): Code to handle 1bit images. > - TIFFRenderer.configure(): provide better configuration using names for > compression methods. > - Override the new protected method described above to create the > Buffered image depending on the configuration. > > If you don't want to hack FOP code, the work-around is to convert the > generated TIFF file after generation to CCITT format somehow. Obvious, > isn't it? :-) > > On 08.09.2006 11:04:22 Oliver Hernàndez Valls wrote: > > Hi all, > > I'm working with fop to generate MTIFF text images. At the moment i'm > > using fop-trunk because no justification functionality is working in fop > > 0.92 for tiffs. > > Right now I've all the functionality to generate parametrized text > > images implemented. By default fop uses packbits compression and colored > > image coding. > > I'd like to change the tiff coding to TIFF-G because generated images > > with the default tiff coding are very big (around 9000 kB) and > > coloration is not needed for the images I'm generating. > > I'm using the "new" FOUserAgent parameter setTargetResolution(int), but > > I can't see any way to change the default encoding for tiff images. > > Some time ago I readed this somewhere in the source code: "//TODO > > Support output of monochrome bitmaps (fax-style)", but don't know if it > > has something to do with changing tiff coding. > > > > Any hint/workarround/documentation please? > > > > Thanks a lot, salut / cheers ! > > > Jeremias Maerki Jeremias Maerki --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
