Debenu Quick PDF Library - PDF SDK Community Forum : crop marks

crop marks : Add: "this.Library."...

Tue, 23 Feb 2016 12:31:54 +0000

Author: martin.weigl
Subject: 3220
Posted: 23 Feb 16 at 12:31PM

Add: "this.Library." is the reference you normally find as "QP.". Guess you might already have figured that out

crop marks : Don't know if it's...

Tue, 23 Feb 2016 12:26:03 +0000

Author: martin.weigl
Subject: 3220
Posted: 23 Feb 16 at 12:26PM

Don't know if it's still interesting for you, but I had the same problem in here - adding a trimbox and cropmarks after the content has been drawn before.

My solution (C#):

Let' suppose, the variable trimBoxInches holds the width of the trim box

iterate through the pages, add a new page for every page and capture the (first) page (which removes it, so the next page is always the first):

IDictionary<int, int> pageIds = new Dictionary<int, int>();

int nrOfPages = this.Library.PageCount();

for (int page = 1; page <= nrOfPages; page++)
{
this.Library.NewPage();
this.Library.SelectPage(1);
int pageId = this.Library.CapturePage(1);
pageIds.Add(page, pageId);

}

Afterwards you can calculate the new dimensions of your pages and resize them:

double pageWidth = this.Library.PageWidth();
double pageHeight = this.Library.PageHeight();
double newPageWidth = pageWidth + 2 * trimBoxInches;
double newPageHeight = pageHeight + 2 * trimBoxInches;

this.Library.SetPageDimensions(newPageWidth, newPageHeight);

After this the captured pages can be redrawn again:

foreach (KeyValuePair entry in pageIds)
{
int pageNr = entry.Key;
int pageId = entry.Value;

this.Library.SelectPage(pageNr);
this.Library.DrawCapturedPage(pageId, trimBoxInches, trimBoxInches + pageHeight, pageWidth, pageHeight);

double trimBoxLength = trimBoxInches; // eventually you want to make the lines a little bit shorter here

// prepare drawing
this.Library.SetLineColorCMYK(0, 0, 0, 1);
this.Library.SetLineWidth(...); // set the width of your cropmarks here

// bottom left corner
this.Library.DrawLine(0, trimBoxInches, trimBoxLength, trimBoxInches);
this.Library.DrawLine(trimBoxInches, 0, trimBoxInches, trimBoxLength);

// bottom right corner
this.Library.DrawLine(newPageWidth, trimBoxInches, newPageWidth - trimBoxLength, trimBoxInches);
this.Library.DrawLine(newPageWidth - trimBoxInches, 0, newPageWidth - trimBoxInches, trimBoxLength);

// top right corner
this.Library.DrawLine(newPageWidth, newPageHeight - trimBoxInches, newPageWidth - trimBoxLength, newPageHeight - trimBoxInches);
this.Library.DrawLine(newPageWidth - trimBoxInches, newPageHeight, newPageWidth - trimBoxInches, newPageHeight - trimBoxLength);

// top left corner
this.Library.DrawLine(0, newPageHeight - trimBoxInches, trimBoxLength, newPageHeight - trimBoxInches);
this.Library.DrawLine(trimBoxInches, newPageHeight, trimBoxInches, newPageHeight - trimBoxLength);

}

And, of course, you want to add a trimbox for the print office:

this.Library.SetPageBox(4, trimBoxInches, trimBoxInches, pageWidth, pageHeight);

Hth,

Martin

Edited by martin.weigl - 23 Feb 16 at 12:35PM

crop marks : New Debenu user here.I've...

Mon, 30 Nov 2015 22:31:25 +0000

Author: pdfer
Subject: 3220
Posted: 30 Nov 15 at 10:31PM

New Debenu user here.

I've been publishing books using PDF files for some years now, but the latest twist my publisher is throwing at me (after personnel changes there) is that they want me to add crop marks to my master files. In the past, I've presented the master files without margins or crop marks, and they did whatever they needed. Now, it seems, with the personnel changes, they've forgotten how... and I never knew how...because I didn't need to know.

So lets say I generate a page of data 180mm × 110mm in image size. I want to add a margin of 9mm fore edge and 11mm gutter, and 9mm top and bottom. I further want to add enough space for crop marks... is there a standard somewhere for the distance from the trim edge where the crop mark should start, how long it should be, what line weight, etc.?

And so where would I start to do this as I create my PDF file? Some pages will be full-page graphics (no bleed required, though), others text, if the handling should be different.