How do I replace a text placeholder in PDF files
I tried to replace a placeholder in a pdf file. After I extracted the text and replaced the placeholder with the desired value, I had to rebuild the file, while preserving all formatting. The...
View ArticleR = 6? Standard Encryption Dictionary; AES-256; Acrobat X Pro
Hello Everyone, I've noticed something odd when using Acrobat X Pro to output an AES-256 encrypted PDF file for "Acrobat X and higher". The standard encryption dictionary has R as 6 (see below). 77 0...
View ArticleCross Reference Stream Problem
Hi I try to develop a PDF parser, but I'm stuck at Cross Reference Streams.My program first reads all objects from a PDF document, and then saves it. If the version is 1.5 or higher, the cross...
View ArticleBaseFont and FontName must be equals?
I have trouble with an PDF/A document and some readers we are using: - Acrobat (Reader) 9.X works fine- Acrobat (Reader) 6.X and our own inhouse reader have problems I tracked it down to the following...
View ArticleDealing with Predictors when decoding PDFs
I've seen a lot of questions about how to "unpredict" Xref streams. The answer usually goes something like "RTFM!" Well, I have R'd the FM, and it's still complicated. So, to save others the pain I've...
View ArticleHow to determine initial hide/show state of form button fields?
I have a page with five rollover buttons labeled 1,2,3,4,5. Each button when rolled shows an image in a mutually exclusive fashion. When I load the page in Acrobat Reader, initially the first button...
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Formal representation missing items?
The "Formal Representation of PDF 1.7" document from Acrobat X is very interesting, but it appears to be missing a few parts. What is the official status of this document? Advisory? Internal Use?...
View ArticlePdfCreator
Pardon for English I have been able to program in foxpro the pdfcreator medianto commands COM+. The same one generates a pdf by means of a report which has images and richtext. All well, alone that the...
View Articlewhat is imagemask
hi...i am facing some problem in converting a pdf to swf...the conversion takes more time as the pdf contains transparent images.can anyone tell me what exactly is image mask....and other query is how...
View ArticleExamples of Soft Mask images
Hi, I need to implement Soft Mask image support for a PDF generator (specifically we need to be able to embed PNG images with transparency), read the relevant sections in the PDF specs (sections 8.9.5,...
View ArticleColors in PDF
I am "experimenting" a little with colors in a PDF file.In the file I create two squares. The first square is colored using DeviceCMYK.The second square has the same color as the first one, but using...
View ArticleCustom PDF Viewer & Printer
Hi PDF Gurus,I need to develop an application in which I can:1- Only view a PDF document (and any other features to browse in PDF document) but not freely print it, save it as... and send it by...
View ArticleWhat is PDF/x-4?
Okay, I see ID CS3 exports PDF/x-4 files; but, documentation is skimy or non-existent, it seems. Can anyone tell me how this standard differs from PDF/x-1a and PDF/x-3. I kow x-1a exports CMYK files...
View ArticleShadow generation in the PDF Language.
I am working on an application that needs to create PDF files from vector-based imagery. There appears to be an extension to the language (which may be Mac-specific) that allowspaths to have...
View ArticleSample PDFs
I search sample PDFs which demonstrates different transparency group cases:Something like that on page 741 of ISO 32000-1:2008. Thanks in advance!
View ArticleProducing signed PDF files without using incremental updates
Hello, I know that, it's possible to sign existing PDF files by adding new objects (such as Signature dictionary) and incrementally modifiying Catalog, Pages objects etc. accordingly. But what about...
View Articlehaw i get the last trailer?
i start from the end of the document, then i read the startxref and locate the xref, then i parse the crossrefrence and get the trailer.i dot this operation recursively but when i finish my parse haw...
View ArticleUsage Rights question
Hi, I'm working on a product which allows to generate PDF files. One of our customers has asked about enabling Usage Rights in Abode Reader for the generated documents. So I'm currently investigating...
View ArticleGet UTF-16 characters into PDF Document
I am trying to figure out how to get unicode characters that don't begin with \u00 to render as PDF.The following PDF works fine, because the Unicode character i'm tryng to render starts with...
View ArticlePDF javascript action for "rotate 90 deg"
Hi! Where can I find a list over the different javascript actions that can control the viewing of pdf documents? I am specifically looking for the rotate command. Currently, those I know about are...
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