PdfStamper.getImportedPage() and the usage of PdfImportedPage (assumption to be verified and two questions)

[Martin Weiss]

Hi all iText cracks,
please verify my assumption:
PdfStamper.getImportedPage() copies the content stream and its resources to the writer (stamper) as an external XObject (Form XObject). Each getImportedPage() increases therefor the size of the resulting document, independent of whether the XObject is referenced or not.
My question:
The imported page (external XObject) can be referenced in the following two ways: PdfContentByte.addTemplate(...) or PdfContentByte.addImage(...) when wrapping the PdfImportedPage object with an Image instance. Reasons the wrap the imported page in an image (performance, content stream aspects, etc) ?
Thanks and kind regards,
Martin

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[Paulo Soares-3]

Reasons the wrap the imported page in an image: convenience. It's easier to scale and rotate an image. There's no performance or size impact.

Paulo

________________________________________
From: martin.weiss@... [martin.weiss@...]
Sent: Friday, November 06, 2009 2:44 PM
To: itext-questions@...
Subject: [iText-questions] PdfStamper.getImportedPage() and the usage of PdfImportedPage (assumption to be verified and two questions)

Hi all iText cracks,
please verify my assumption:
PdfStamper.getImportedPage() copies the content stream and its resources to the writer (stamper) as an external XObject (Form XObject). Each getImportedPage() increases therefor the size of the resulting document, independent of whether the XObject is referenced or not.
My question:
The imported page (external XObject) can be referenced in the following two ways: PdfContentByte.addTemplate(...) or PdfContentByte.addImage(...) when wrapping the PdfImportedPage object with an Image instance. Reasons the wrap the imported page in an image (performance, content stream aspects, etc) ?
Thanks and kind regards,
Martin

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[1T3XT info]

martin.weiss@... wrote:
> Hi all iText cracks,
> please verify my assumption:
> PdfStamper.getImportedPage() copies the content stream and its resources to the writer (stamper) as an external XObject (Form XObject). Each getImportedPage() increases therefor the size of the resulting document, independent of whether the XObject is referenced or not.

Correct.

> My question:
> The imported page (external XObject) can be referenced in the following two ways: PdfContentByte.addTemplate(...) or PdfContentByte.addImage(...) when wrapping the PdfImportedPage object with an Image instance. Reasons the wrap the imported page in an image (performance, content stream aspects, etc) ?

Reasons to wrap an imported page inside an Image are: ease of use.

If you like calculating the transformation matrix: use addTemplate();
If you like the convenience methods available in Image to scale and
rotate the image, wrap the page inside an Image.
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