Insert signature field with PDFPoints coordinates

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AlessandroRimoldi View Drop Down

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Topic: Insert signature field with PDFPoints coordinates
Posted: 10 Oct 13 at 8:49AM

Hello, i must create a signature field or add an image to a PDF and the destination coordinate and values for size are in PDFPoints. How can i do?

Thank You!

Ingo

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Posted: 11 Oct 13 at 12:31PM

Hi Alessandro!

I want to create a car ... please tell me how to do ;-)

There are "first-step-guids" online and you have documentation with your installation.

Please read inside the developer guide and the online reference.

Start with an easy app... step by step... and then you should post about special problems with one function or another function ... :)

Cheers and welcome here,

Ingo

Cheers,
Ingo

Rowan

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Posted: 11 Oct 13 at 1:01PM

Hi Alessandro,

Thanks for your post.

The information you need is in the Developer Guide for Debenu Quick PDF Library (provided with the installer).

Origin point for drawing operations

The origin has coordinates of “0,0” and is the starting point for finding all other points. The origin

point for a page in a PDF typically starts at a page corner. The default origin for Debenu Quick

PDF Library is the bottom left page corner.

Using the SetOrigin function in Debenu Quick PDF Library you can change the point of origin to

be any page corner (bottom left, top left, top right, bottom right).

By default calling DrawText(10, 10, “Test”) will result in the text being drawn at 10 points in from

the left of the page and 10 points up from the bottom of the page, but if you call SetOrigin(1)

prior to DrawText then the text will be drawn at 10 points in from the left of the page and 10

points down from the top of the page because passing the value 1 to the Origin parameter for

the SetOrigin function changes the origin to top left of the page.

The default point of origin in Adobe Acrobat was the bottom left page corner up until Acrobat

8, at which point Adobe switched the point of origin to the top left page corner. As mentioned

above, you can set Debenu Quick PDF Library to use any page corner in a PDF.

In version 7.25 of Debenu Quick PDF Library we added a new function called NormalizePage

that moves and/or rotates the contents of the page so that subsequent drawing operations are

at the expected position on the page. All the page boundary boxes are adjusted to the physical

size of the page and the page's rotation attribute is reset to zero.

Measurement units

In PDF the coordinate system is called default user space. The default for the size of the unit in

default user space (1/72 inch) is approximately the same as a point, a unit widely used in the

printing industry. It is not exactly the same, however; there is no universal definition of a point.

Lastly, here is a knowledge base article for adding a digital signature field and and adding an image to a PDF programmaticaly.

Cheers,

- Rowan.

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Posted: 26 Oct 13 at 10:04PM

I decided to post my question here since you guys talking about placing digital signature into existed PDF file.

Here are the steps I follow:

Create an instance of the library :

lnInstanceId = DPLCreateLibrary()

Get selected document (default) ID:

lnSelectedDocumentID = DPLGetDocumentID(lnInstanceID, 1)

Set origin coordinates (Top-Left):

lnResult = DPLSetOrigin(lnInstanceID, 1)

Set other settings:

lnResult = DPLSetNeedAppearances(lnInstanceID, 1)

lnResult = DPLSetPageDimensions(lnInstanceID, lnPhysicalPaperWidth, lnPhysicalPaperLength)

lnResult = DPLSelectPage(lnInstanceID, 1)

lnLayer = DPLNewContentStream(lnInstanceID)

Then I draw the text into PDF file and save it as lcPDFFile:

lnResult = DPLSaveToFile(lnInstanceId, lcPDFFile)

lnResult = DPLRemoveDocument(lnInstanceId, lnSelectedDocumentID)

After that I open newly created PDF file in order to place “visual” digital signature using same instance of the library:

lnSignProcessID = DPLNewSignProcessFromFile(lnInstanceID, tcFileName, lcPassword)

Set origin coordinates (Top-Left) again, because after DPLRemoveDocument() command it was reset to 0: lnResult = DPLSetOrigin(lnInstanceID, 1)

Now my origin coordinates are set to Top-Left. But when I try to bound field it shows it in the wrong place (looks like it uses default origin coordinates (Bottom-Left)) :

lnResult = DPLSetSignProcessPFXFromFile(lnInstanceID, lnSignProcessID, lcPFXFileName, lcPFXFilePassword)

lnResult = DPLSetSignProcessInfo(lnInstanceID, lnSignProcessID, lcReason, lcLocation, lcContactInfo)

lnResult = DPLSetSignProcessField(lnInstanceID, lnSignProcessID, lcTitleOfFormField)

lnResult = DPLSetSignProcessFieldBounds(lnInstanceID, lnSignProcessID, lnLeft, lnTop, lnWidth, lnHeight)

lnResult = DPLSetSignProcessFieldImageFromFile(lnInstanceID, lnSignProcessID, lcSignatureImageFileName, 0)

lnResult = DPLEndSignProcessToFile(lnInstanceID, lnSignProcessID, lcTempFileName)

Am I missing something?

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
AlessandroRimoldi Members Profile Find Members Posts Beginner Joined: 01 Aug 12 Location: Italy Status: Offline Points: 9	Post Options Post Reply Quote AlessandroRimoldi Report Post Thanks(0) Quote Reply Topic: Insert signature field with PDFPoints coordinates Posted: 10 Oct 13 at 8:49AM
	Hello, i must create a signature field or add an image to a PDF and the destination coordinate and values for size are in PDFPoints. How can i do? Thank You!

Ingo Members Profile Find Members Posts Moderator Group Joined: 29 Oct 05 Status: Offline Points: 3524	Post Options Post Reply Quote Ingo Report Post Thanks(0) Quote Reply Posted: 11 Oct 13 at 12:31PM
	Hi Alessandro! I want to create a car ... please tell me how to do ;-) There are "first-step-guids" online and you have documentation with your installation. Please read inside the developer guide and the online reference. Start with an easy app... step by step... and then you should post about special problems with one function or another function ... :) Cheers and welcome here, Ingo
	Cheers, Ingo

Rowan Members Profile Find Members Posts Moderator Group Joined: 10 Jan 09 Status: Offline Points: 398	Post Options Post Reply Quote Rowan Report Post Thanks(0) Quote Reply Posted: 11 Oct 13 at 1:01PM
	Hi Alessandro, Thanks for your post. The information you need is in the Developer Guide for Debenu Quick PDF Library (provided with the installer). Origin point for drawing operations The origin has coordinates of “0,0” and is the starting point for finding all other points. The origin point for a page in a PDF typically starts at a page corner. The default origin for Debenu Quick PDF Library is the bottom left page corner. Using the SetOrigin function in Debenu Quick PDF Library you can change the point of origin to be any page corner (bottom left, top left, top right, bottom right). By default calling DrawText(10, 10, “Test”) will result in the text being drawn at 10 points in from the left of the page and 10 points up from the bottom of the page, but if you call SetOrigin(1) prior to DrawText then the text will be drawn at 10 points in from the left of the page and 10 points down from the top of the page because passing the value 1 to the Origin parameter for the SetOrigin function changes the origin to top left of the page. The default point of origin in Adobe Acrobat was the bottom left page corner up until Acrobat 8, at which point Adobe switched the point of origin to the top left page corner. As mentioned above, you can set Debenu Quick PDF Library to use any page corner in a PDF. In version 7.25 of Debenu Quick PDF Library we added a new function called NormalizePage that moves and/or rotates the contents of the page so that subsequent drawing operations are at the expected position on the page. All the page boundary boxes are adjusted to the physical size of the page and the page's rotation attribute is reset to zero. Measurement units In PDF the coordinate system is called default user space. The default for the size of the unit in default user space (1/72 inch) is approximately the same as a point, a unit widely used in the printing industry. It is not exactly the same, however; there is no universal definition of a point. Lastly, here is a knowledge base article for adding a digital signature field and and adding an image to a PDF programmaticaly. Cheers, - Rowan.

Marat.Chariev Members Profile Find Members Posts Team Player Joined: 18 Oct 13 Status: Offline Points: 24	Post Options Post Reply Quote Marat.Chariev Report Post Thanks(0) Quote Reply Posted: 26 Oct 13 at 10:04PM
	I decided to post my question here since you guys talking about placing digital signature into existed PDF file. Here are the steps I follow: Create an instance of the library : lnInstanceId = DPLCreateLibrary() Get selected document (default) ID: lnSelectedDocumentID = DPLGetDocumentID(lnInstanceID, 1) Set origin coordinates (Top-Left): lnResult = DPLSetOrigin(lnInstanceID, 1) Set other settings: lnResult = DPLSetNeedAppearances(lnInstanceID, 1) lnResult = DPLSetPageDimensions(lnInstanceID, lnPhysicalPaperWidth, lnPhysicalPaperLength) lnResult = DPLSelectPage(lnInstanceID, 1) lnLayer = DPLNewContentStream(lnInstanceID) Then I draw the text into PDF file and save it as lcPDFFile: lnResult = DPLSaveToFile(lnInstanceId, lcPDFFile) lnResult = DPLRemoveDocument(lnInstanceId, lnSelectedDocumentID) After that I open newly created PDF file in order to place “visual” digital signature using same instance of the library: lnSignProcessID = DPLNewSignProcessFromFile(lnInstanceID, tcFileName, lcPassword) Set origin coordinates (Top-Left) again, because after DPLRemoveDocument() command it was reset to 0: lnResult = DPLSetOrigin(lnInstanceID, 1) Now my origin coordinates are set to Top-Left. But when I try to bound field it shows it in the wrong place (looks like it uses default origin coordinates (Bottom-Left)) : lnResult = DPLSetSignProcessPFXFromFile(lnInstanceID, lnSignProcessID, lcPFXFileName, lcPFXFilePassword) lnResult = DPLSetSignProcessInfo(lnInstanceID, lnSignProcessID, lcReason, lcLocation, lcContactInfo) lnResult = DPLSetSignProcessField(lnInstanceID, lnSignProcessID, lcTitleOfFormField) lnResult = DPLSetSignProcessFieldBounds(lnInstanceID, lnSignProcessID, lnLeft, lnTop, lnWidth, lnHeight) lnResult = DPLSetSignProcessFieldImageFromFile(lnInstanceID, lnSignProcessID, lcSignatureImageFileName, 0) lnResult = DPLEndSignProcessToFile(lnInstanceID, lnSignProcessID, lcTempFileName) Am I missing something?