Alright, I think I understand now.
I had assumed the PdfImportedPage obtained via the line
"tmpWriter.GetImportedPage(new PdfReader("test.pdf"), 1);" would be completely
'self-contained'
Thanks for this explanation. And I will have a look into getting your book.
> Date: Wed, 30 Sep 2009 08:27:20 +0200
> From: [email protected]
> To: [email protected]
> Subject: Re: [iText-questions] Importing a PDF as an Image object
>
> Y Fang wrote:
> > In other words, it is rather unclear (and still is) why the Image
> > produced by the following method:
> [1]
> > PdfImportedPage page = tmpWriter.GetImportedPage(new
> > PdfReader("test.pdf"), 1);
> > Image image = Image.GetInstance(page);
>
> > is somehow different to the Image produced by this method.
> [2]
> > Image image = Image.GetInstance("image.jpg");
>
> [2] is a raster image: bits and bytes that are self contained.
> In PDF lingo: an image XObject
> [1] is a stream of PDF syntax + resources such as fonts, images,...
> In PDF lingo: it's a form XObject
>
> With [2], you have all the necessary data in the Image object.
> With [1] all resources that are referred to from the content stream
> are copied to the Writer (tmpWriter) when you do getImportedPage().
> The Image obtained with Image.getInstance(page) isn't self contained.
> It needs the resources that are already copied to tmpWriter when
> invoking getImportedPage().
>
> The difference between an image XObject and a form XObject is
> explained in the book: chapter 10. That's a chapter that isn't
> available for free, so you might want to buy the book anyway.
> --
> This answer is provided by 1T3XT BVBA
> http://www.1t3xt.com/ - http://www.1t3xt.info
>
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_______________________________________________
iText-questions mailing list
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Check the site with examples before you ask questions:
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You can also search the keywords list: http://1t3xt.info/tutorials/keywords/
