Thanks for the new check-ins, that's really great!
As to the PdfStreamedDocument, I must say I am a bit lost here, you say
below:
// Now write the image out to disc
pImage.SetImageData (imgChunk.width, imgChunk.height, 8, &pStream);
How exactly are you writing to disc here? a page wasn't yet created, and
obviously it is not written to the document directly, so you do have the
pdf images in memory all that time (unless you somehow write to
temporary file and read it when painter DrawImage() the content of the
page, which I doubt).
Where's the flushing mechanism?
Thanks in advance
yoni
-----Original Message-----
From: Dominik Seichter [mailto:[EMAIL PROTECTED]
Sent: Tuesday, July 31, 2007 3:33 PM
To: [email protected]
Cc: Jonathan Sibony
Subject: Re: [Podofo-users] Write current object to file
Hi,
Well this is what PdfStreamedDocument will do for you. After my latest
commit
you should be able to use PdfStreamedDocument as you can now set the
PdfVersion to 1.6.
One thing you have to be careful about is, that PdfStreamedDocument is
only
able to stream one object out to disc directly at a time. So you should
not
work on a page and an image at the same time. Some code like this should
give
you best performance.
PdfStreamedDocument doc( "file.pdf", ePdfVersion_1_6 );
PdfPainter painter;
Image imgChunk = GetNextChunk();
PdfMemoryInputStream pStream
(imgChunk.GetBuffer(),imgChunk.GetSizeInBytes());
PdfImage pImage(&document);
// Now write the image out to disc
pImage.SetImageData (imgChunk.width, imgChunk.height, 8, &pStream);
PdfPage* pPage = document.CreatePage( size );
painter.SetPage( pPage );
// page contents can now also be written to disc and the image is
already
written out
painter.DrawImage( pImage );
Maybe you have to create an array of PdfImage objects before creating
your
page, but this won't matter as a PdfImage is small in memory as all data
is
streamed out to disc when used with PdfStreamedDocument.
best regards,
Dom
Am Tuesday 31 July 2007 schrieb Jonathan Sibony:
> Hello All,
>
> Small question regarding the way things are being written to
> file in PdfDocument.
> For now the way I put images into my document is pretty much as
> follows:
>
> PdfDocument document;
> document.SetPdfVersion(ePdfVersion_1_6);
> ...
> PdfPage* pPage = document.CreatePage(rSize);
>
> PdfPainter painter;
> painter.SetPage( pPage );
>
> while(i < ...)
> {
> Image imgChunk = GetNextChunk();
> PdfMemoryInputStream pStream
> (imgChunk.GetBuffer(),imgChunk.GetSizeInBytes());
>
> PdfImage pImage(&document);
> pImage.SetImageData (imgChunk.width, imgChunk.height, 8,
> &pStream);
>
> painter.DrawImage (0, i, &pImage, 1.0, 1.0);
> i += imgChunk.height;
> }
>
> painter.FinishPage();
> document.Write (fname);
>
>
> This work fine, however it means I hold the document in memory
> till I call the Write() function to flush it down to file.
> This can pose a problem when images chunks are numerous and
> quite big.
> What I would really like is a way to flush each chunk to file
> within the loop, right after DrawImage by the painter i.e. a way to
> write the current object without any need to wait till the page is
> finished.
>
> Is it possible?
>
> Many Thanks!
> Jonathan
--
**********************************************************************
Dominik Seichter - [EMAIL PROTECTED]
KRename - http://www.krename.net - Powerful batch renamer for KDE
KBarcode - http://www.kbarcode.net - Barcode and label printing
PoDoFo - http://podofo.sf.net - PDF generation and parsing library
SchafKopf - http://schafkopf.berlios.de - Schafkopf, a card game, for
KDE
Alan - http://alan.sf.net - A Turing Machine in Java
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