A Cheung wrote:
> Complicated yes, but is it theoretically possible with iText? Can it
> modify these streams and save the modifications?
Yes, it's possible, but it's a lot of work.
> Thanks, but my question is then about Colorspaces. I am trying to keep
> the PDF small so making images of 16M colours makes it too large.
I didn't say you had to use an image if 16M colors.
You can easily use a black and white image.
You probably want to use CCITT.
> PdfContentByte p = stamper.getOverContent(1);
> p.addImage(Image.getInstance("my.tiff"), width,0,0,height,0,0)
>
> The above code adds an image (Xi0) to my file with the Colorspace that
> is correct. (It isn't DeviceGray or DeviceRGB). I use the Enfocus
> Browser to see the PDF object tree structure and this new "Xi0" image
> has a ColorSpace array[4] and item [3] is the stream data for the
> colorspace of 256 specific colors in use.
And Indexed Colorspace is fine too.
> What I'd like to do is have
> iText create this Colorspace structure for me based on an image
> file (along with Filter/Width/BitsPerComponent) so I can replace my
> original Im0 structure with that data (as in the sample at your URL),
> but _without_ having to add an Xi0 to the PDF to do it since that just
> leaves me with another image that I'd want to remove.
>
> Possible?
Yes.
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