Start by getting a copy of ISO 32000-1:2008 (the PDF Standard) and start
reading.
Then, obtain various programs that can write PDF files with various contents in
them.
Next, get a good PDF "object viewer" such as RUPS, PoDoFo, Enfocus Browser, etc.
Then start making PDFs using the apps that already know how and look at what
they wrote in the viewers and compare to the spec.
Anything else is just "hit and miss".
Leonard
From: New Developer <[email protected]<mailto:[email protected]>>
Reply-To: Post here
<[email protected]<mailto:[email protected]>>
Date: Sun, 2 Oct 2011 07:18:46 -0700
To: Post here
<[email protected]<mailto:[email protected]>>
Subject: Re: [iText-questions] Seeing guidance on PDF images
I would like to learn and do my own, that is why.
Because one word processor exists , we should never write another one ?
I am asking here because obviously there are people here who have more
knowledge and expertise than what I have right now.
and I still would like to learn, more
thanks
On 10/01/2011 09:57 PM, Leonard Rosenthol wrote:
Why would you want to write a completely new PDF library when there are
NUMEROUS ones out there – including the iText library whose mailing list you
posted on…
Leonard
From: New Developer <[email protected]<mailto:[email protected]>>
Reply-To: Post here
<[email protected]<mailto:[email protected]>>
Date: Sat, 1 Oct 2011 08:16:17 -0700
To: Post here
<[email protected]<mailto:[email protected]>>
Subject: [iText-questions] Seeing guidance on PDF images
I'm trying to develop a mini PDF library and I'm stuck on getting images into
the PDF
using to read just a simple (camera generated picture) jpg file
Bitmap bmp;
ByteArrayOutputStream bos = new ByteArrayOutputStream();
bmp.compress(CompressFormat.JPEG, 100 , bos);
How do I get this into the PDF format ?
currently this is what I have
"<< /Type /XObject \n" +
" /Subtype /Image \n" +
" /Width " + bmp.getWidth() + " \n" +
" /Height " + bmp.getHeight() + " \n" +
" /ColorSpace /DeviceRGB \n" +
" /BitsPerComponent 8 \n" +
" /Length " + bos.size() + " \n" +
" /Filter /ASCIIHexDecode \n" +
">> \n" +
"stream \n" +
bos.toString() + "\n" +
"endstream \n" +
"endobj \n\n";
1) I think my /Filter is wrong not sure what to use ?
2) The test image is 341 x 256 => 87296 bos.size() returns 84156 and
yet when I count the number of bytes between stream and endstream in the
generated .pdf file I get 78814 ? What causes these changes ?
3) What is the /Filter equivalence for CompressFormat.JPEG and
CompressFormat.PNG ?
Please any help to get from the bitmap to a displayed image in the PDF file
would be greatly appreciated.
Thanks in Advance
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iText-questions mailing list
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iText(R) is a registered trademark of 1T3XT BVBA.
Many questions posted to this list can (and will) be answered with a reference
to the iText book: http://www.itextpdf.com/book/
Please check the keywords list before you ask for examples:
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------------------------------------------------------------------------------
All of the data generated in your IT infrastructure is seriously valuable.
Why? It contains a definitive record of application performance, security
threats, fraudulent activity, and more. Splunk takes this data and makes
sense of it. IT sense. And common sense.
http://p.sf.net/sfu/splunk-d2dcopy2
_______________________________________________
iText-questions mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/itext-questions
iText(R) is a registered trademark of 1T3XT BVBA.
Many questions posted to this list can (and will) be answered with a reference
to the iText book: http://www.itextpdf.com/book/
Please check the keywords list before you ask for examples:
http://itextpdf.com/themes/keywords.php
