PDF Font Embedding
This paragraph applies both to VFP 9 and VFP 8. The method is implemented both in XFRXListener and XFRXSession classes.
XFRX supports both whole font and font subset embedding.
To embed all characters of all used fonts, call:
before running the report.
To embed only the characters used, call:
Embedding only subset of fonts (characters used in the document) significantly reduces the size of the generated file.
To select which font to embed (e.g. when you need just to embed the barcode font, or font that is not installed on the pc the document will be sent to), add “#UR INCLUDEFONT” (without the quotation marks) to the comments of a field that uses the font (in the report). Add “#UR INCLUDEFONT SUBSET” comment to include the font subset.
Special code pages
XFRX set font embedding subset for special code pages (1250, 1251, 1257, 1254, 1253, 1255) and selected font (Arial, Arial CE, Arial Narrow, Arial Black, Courier New, Courier New CE, Times New Roman, Times New Roman CE) if detect national characters. XFRX set font embedding subset allways for Symbols or if you enable PDF/A support.
If you want change the default behavior (special code page) you can use parameter CHECKFONTFORSPECIALCODEPAGE (for disable or enable) or ADDFONTFORSPECIALCODEPAGE (for add font to list) - since XFRX 17.1
This paragraph applies both to VFP 9 and VFP 8.
To rotate a text or a picture in PDF output, add “#UR ROTATE” (without the quotation marks) to the comment of the report field. The text or the picture will rotate counterclockwise by the entered angle, e.g. to print vertically, add: “#UR ROTATE 90”.
Appending generated output to existing PDF Documents
This paragraph applies both to VFP 9 and VFP 8.
From version 10.1, XFRX is able to append the generated report to an existing PDF document. It is possible to append the report at the end of the document or at an arbitrary position within the document: with either inserting the new pages or replacing the pages in the existing PDF document.
In XFRX for VFP 8 this feature is controlled by a new parameter of SetParams(…) method: tuAppend. Please see the SetParams method reference for more information about setting this parameter.
In XFRX for VFP 9 you can interchangeably use the new parameter of SetParams(…) method or AppendToFile property of the XFRXListener class.
- It's not guaranteed that XFRX will be able to append to any PDF document. It works fine with PDF documents generated by XFRX and we've successfully tested PDFs from other sources, too, but the PDF specification allows for some internal structures that XFRX wouldn't be able to decode. (To be precise: XFRX doesn’t support linearized PDF documents and documents that use page tree structures).
- Because of the way the PDF file is constructed, the size of the PDF document never shrinks, even if the number of pages in the resulting PDF document is smaller than in the original one.
Example: The TEST.FRX report will be appended to the existing TEST.PDF document. If the TEST.PDF file does not exist, it will be created.
Digital signatures in PDF
The digital signature can be used to validate the document content and the identity of the signer. (You can find more at http://en.wikipedia.org/wiki/Digital_signature). XFRX implements the "MDP (modification detection and prevention) signature" based on the PDF specification version 1.7, published in November 2006.
The signing algorithm in XFRX computes the encrypted document digest and places it, together with the user certificate, into the PDF document. When the PDF document is opened, the Adobe Acrobat (Reader) validates the digest to make sure the document has not been changed since it was signed. It also checks to see if the certificate is a trusted one and complains if it is not. The signature dictionary inside PDF can also contain additional information and user rights - see below.
At this moment XFRX supports invisible signatures only (Acrobat will show the signature information, but there is no visual element on the document itself linking to the digital signature). We will support visible signatures in future versions.
In the current version, XFRX is using the CMS/PKCS #7 detached messages signature algorithm in the .net framework to calculate the digest - which means the .NET framework 2.0 or newer is required. The actual process is run via an external exe - "xfrx.sign.net.exe", that is executed during the report conversion process. In future, we can alternatively use the OpenSSL library instead.
How to invoke the digital signing
The syntax is the same for VFP 9.0 and pre-VFP 9.0 calling methods
To generate a signed PDF document, call the DigitalSignature method before calling SetParams. The DigitalSignature method has 7 parameter:
The .pfx file. pfx, the "Personal Information Exchange File". This file contains the public certificate and (password protected) private key. You get this file from a certificate authority or you can generate your own for testing, which for example, OpenSSL (http://www.slproweb.com/products/Win32OpenSSL.html). XFRX comes with a sample pfx that you can use for testing.
The password protecting the private key stored in the .pfx file
per PDF specification:
1 - No changes to the document are permitted; any change to the document invalidates the signature.
2 - Permitted changes are filling in forms, instantiating page templates, and signing; other changes invalidate the signature. (this is the default value)
3 - Permitted changes are the same as for 2, as well as annotation creation, deletion and modification; other changes invalidate the signature.
per PDF specification: The name of the person or authority signing the document. This value should be used only when it is not possible to extract the name from the signature; for example, from the certificate of the signer.
per PDF specification: Information provided by the signer to enable a recipient to contact the signer to verify the signature; for example, a phone number.
per PDF specification: The CPU host name or physical location of the signing.
per PDF specification: The reason for the signing, such as ( I agree ... ).
The demo application that is bundled with the package (demo.scx/demo9.scx) contains a testing self-signed certificate file (TestEqeus.pfx) and a sample that creates a signed PDF using the pfx. Please note Acrobat will confirm the file has not changed since it was signed, but it will complaing the certificate is not trusted - you would either need to add the certificate as a trusted one or you would need to use a real certificate from a certification authority (such as VeriSign).
PDF/A is an ISO standard for the digital preservation of electronic documents. PDF/A document is a PDF document with specific restrictions that ensure that the document will always display and print exactly the same way, no matter which platform or document viewer is used:
- Platform independent
- No hidden or transparent content
- All information needed to display the document is embedded (including fonts)
- Document metadata stored as XML
- No encryption, no password protection
- No LZW compression
- Displayed and printed content must match (all annotations must be printed)
There are currently two PDF/A specifications:
- PDF/A-1 from 2005
- PDF/A-2 from 2011
- PDF/A-3 from 2014
XFRX currently supports specification:
|2a||yes (XFRX 16.0)||valid||nonvalid|
|2b||yes (XFRX 16.0)||valid||nonvalid|
|2u||yes (XFRX 16.0)||valid||nonvalid|
|3a||yes (XFRX 16.0)||valid||nonvalid|
|3b||yes (XFRX 16.0)||valid||nonvalid|
|3u||yes (XFRX 16.0)||valid||nonvalid|
Please note the PDF/A-enabled document files can be significantly larger than regular PDF documents because the used fonts must always be included.
To generate a PDF/A document, call SetPDFA(.T.,[lcLevel]) method on the session object before processing. This method is available in VFP8 and VFP9 session objects, as well as the XFRX#DRAW object.
Barcode support (#UR SYMBOLFONT)
(Obsolete since XFRX 15.7)
Put "#UR SYMBOLFONT" into the comment of the report field that contains the barcode. This will instruct the engine not to do any codepage conversions and flag the font as a symbol font in the PDF document.
Put #UR COLOR "CMYK" for images in CMYK.
Negative image support
Put #UR COLOR "NEG" for images in negative colors.
MASK support - transparent image
Put #UR MASK "[255 255 255 255 255 255]" for images with transparent colors. See to "Color Key Masking" in pdf reference.
You can set general color for images with transaparent background (since XFRX 16.1)
Default color is white - RGB(255,255,255)
Default picture format
(since XFRX 16.2.0)
PDF output knows only jpeg and bitmap pictures. Other format pictures converts to bitmap (default choice). You can change to jpeg.
Parameter UNICODE support
You can set UNICODE output for document.
To select which font to embed as UNICODE (e.g. when you need just to embed the barcode font, or font that is not installed on the pc the document will be sent to), add “#UR INCLUDEFONT UNICODE” (without the quotation marks) to the comments of a field that uses the font - in the report (since XFRX 16.0).
On french OS you can have problem with searching in Adobe Reader. In this case you can set parameter DONOPUTDOCUMENTID, if you do not use passwords or digital signature.
Parameters DEVELOP and DEVELOPFOLDER
If you set these parameters, xfrx copy temporary files into specified folder.
If you set the parameter, output stream inside PDF will not be compressed.
Page layout, Page mode and Viewer Preferences
(since XFRX 16.0)
specifying the page layout to be used when the document is opened
|"SinglePage"||Display one page at a time|
|"OneColumn"||Display the pages in one column|
|"TwoColumnLeft"||Display the pages in two columns, with odd-numbered pages on the left|
|"TwoColumnRight"||Display the pages in two columns, with odd-numbered pages on the right|
|Display the pages two at a time, with odd-numbered pages on the left|
|Display the pages two at a time, with odd-numbered pages on the right|
|PageMode||specifying how the document should be displayed when opened|
|"UseNone"||Neither document outline nor thumbnail images visible|
|"UseOutlines"||Document outline visible|
|"UseThumbs"||Thumbnail images visible|
|"FullScreen"||Full-screen mode, with no menu bar, window controls, or any other window visible|
|"UseOC"||Optional content group panel visible|
|"UseAttachments"||Attachments panel visible|
|ViewerPreferences||HideToolbar||.T.||A flag specifying whether to hide the viewer application’s tool bars when the document is active. Default value: .F..|
|ViewerPreferences||HideMenubar||.T.||A flag specifying whether to hide the viewer application’s menu bar when the document is active. Default value: .F..|
|ViewerPreferences||HideWindowUI||.T.||A flag specifying whether to hide user interface elements in the document’s window (such as scroll bars and navigation controls), leaving only the document’s contents displayed. Default value: .F..|
|ViewerPreferences||FitWindow||.T.||A flag specifying whether to resize the document’s window to fit the size of the first displayed page. Default value: .F..|
|ViewerPreferences||CenterWindow||.T.||A flag specifying whether to position the document’s window in the center of the screen. Default value: .F..|
|ViewerPreferences||DisplayDocTitle||.T.||1.4||A flag specifying whether the window’s title bar should display the document title taken from the Title entry of the document information dictionary (see Section 10.2.1, “Document Information Dictionary”). If false, the title bar should instead display the name of the PDF file containing the document. Default value: .F..|
|ViewerPreferences||NonFullScreenPageMode||The document’s page mode, specifying how to display the document on exiting full-screen mode.|
|"UseNone"||Neither document outline nor thumbnail images visible.|
|"UseOutlines"||Document outline visible.|
|"UseThumbs"||Thumbnail images visible.|
|"UseOC"||Optional content group panel visible.|
|ViewerPreferences||Direction||1.3||The predominant reading order for text.|
|"L2R"||Left to right.|
|"R2L"||Right to left .|
|ViewerPreferences||PrintScaling||1.6||The page scaling option to be selected when a print dialog is displayed for this document|
|"None"||Indicates that the print dialog should reflect no page scaling.|
|"AppDefault"||Indicates that applications should use the current print scaling.|
|ViewerPreferences||Duplex||1.7||The paper handling option to use when printing the file from the print dialog.|
|"DuplexFlipShortEdge"||Duplex and flip on the short edge of the sheet .|
|"DuplexFlipLongEdge"||Duplex and flip on the long edge of the sheet.|
|ViewerPreferences||PickTrayByPDFSize||.T.||1.7||A flag specifying whether the PDF page size is used to select the input paper tray|
|ViewerPreferences||PrintPageRange||"0 1"||1.7||The page numbers used to initialize the print dialog box when the file is printed.|
|ViewerPreferences||NumCopies||2||1.7||The number of copies to be printed when the print dialog is opened for this file|
(since XFRX 16.1)
You can set PDF version. Default version is 1.6 for XFRX 16.0, 1.7 for XFRX 16.1. Change PDF version must be first after calls setParams() method.
(since XFRX 17.0.0)
Specifies the width, in characters, of a tab. Default value is 4.