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From "Eric SCHAEFFER" <eschaef...@posterconseil.com>
Subject Re: XSL Formatting Objects Chapter Updated
Date Wed, 11 Oct 2000 15:47:58 GMT

----- Original Message -----
From: "Carlos Villegas" <cav@uniscope.co.jp>
To: <fop-dev@xml.apache.org>
Sent: Wednesday, October 11, 2000 5:32 PM
Subject: Re: XSL Formatting Objects Chapter Updated


> Eric SCHAEFFER wrote:
> > Can you send me your code ?
> >
> > > I am generating some images and including them in a FOP generated PDF
file
> > using such a fake URLConnection class. Unfortunately the image at the
moment
> > is of class "Image" which seems to be uncompressed and the PDF file is
> > around 2Mb because of it.
> > >
> > > If I can do this with an uncompressed Image I should be able to do the
> > same thing with a GIF. Surely if I supply FOP with a GIF it wont
uncompress
> > it before putting it into the PDF file will it?
> > >
> >
> > All images are uncompressed, because compression is different in PDF.
> > But they are compressed again, using ZLib algo.
> >
> > The only difference there can be is that images are converted to RGB
color
> > space.
>
> As I understand JPEG images and indexed images are treated the same way;
> uncompressed to RGB color and compressed again with Zlib.
> For bitmaps this is fine, but in case of JPEG, it's a waste to throw
> away the 10:1 typical compression ratio of a JPEG image. Zlib can't
> get those ratios. Wouldn't be possible to "just" include the JPEG image
> in the
> PDF. I don't know much about PDF, but it supports JPEG, version 1.3 even
> support progressive JPEG and reading from external image files.
> I know it may not be "just" including it, you might need to do some
> manipulation, but I think it might be possible to extract the JPEG
> data without modifying it. Just a thought...

Needs to be done...
Eric.

>
> Carlos Villegas
>


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