How to increase or decrease the size of a pdf file
Printed From: Debenu Quick PDF Library - PDF SDK Community Forum
Category: For Users of the Library
Forum Name: I need help - I can help
Forum Description: Problems and solutions while programming with the Debenu Quick PDF Library and Debenu PDF Viewer SDK
URL: http://www.quickpdf.org/forum/forum_posts.asp?TID=2625
Printed Date: 30 Jan 26 at 9:10AM
Software Version: Web Wiz Forums 11.01 - http://www.webwizforums.com
Topic: How to increase or decrease the size of a pdf file
Posted By: Alfs
Subject: How to increase or decrease the size of a pdf file
Date Posted: 29 Apr 13 at 6:05PM
Hello:
Is possible increase or decrease the size of a pdf page and content maintaining the aspect ratio?
Thanks.
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Replies:
Posted By: Ingo
Date Posted: 29 Apr 13 at 7:14PM
Hi Alfs!
Yes... That's possible.
The easiest way is going through the pages rendering them
with different dpi-values to stream (pdf pages to image ) and
back (image to pdf pages) to new pdf-pages.
var Test_Stream : Tmemorystream;
jpg : TJPEGImage;
begin
// . . .
QP := TDebenuPDFLibrary0913.Create;
Try
// . . .
QP.LoadFromFile(Edit1.text, '');
// . . .
// here you can deal with the zoom-value to
// increase/decrease the image and later the
// new pdf-page(s)
QP.RenderPageToStream(zoom,1,1,test_stream);
// . . .
Finally
QP.Free;
End;
// . . .
// now use the AddImageFrom-functions ...
// ... and draw the image into a new pdf.
// . . .
Cheers and welcome here,
Ingo
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Posted By: Alfs
Date Posted: 29 Apr 13 at 7:22PM
Thanks Ingo, but i need PDf format, not a renderPDF.
Thanks again.
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Posted By: Ingo
Date Posted: 29 Apr 13 at 7:41PM
Hi!
Your first post and then immediately absolute heavy stuff ;-)
You have to extract all objects of the page (text, images, ...)
resize them all drawing them at last to a new page.
If i want it ... I wouldn't do it ... ;-)
My render-idea is to avoid all these problems and in the end
you have a new pdf... and that counts ;-)
Cheers, Ingo
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Posted By: Alfs
Date Posted: 29 Apr 13 at 7:53PM
:)))))
Yes, it's heavy stuff.
I use the Ghoscript, running it as external program works, but I wanted to use a library of Delphi and thought that maybe QuickPdf library, could do it.
The need to maintain the pdf format is by geometry
An example would be possible?
Thanks again Ingo
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