Looking through the Rectangle.rotate() -> Pdf-structures-in-the-output code, I
think we might have An Issue. Woah woah woah... let me check the trunk instead
of my red-headed-stepchild-branch of 2.0.whatever-it-was.
Rectangle.rotate() { // yep, no changes
Rectangle rect = new Rectangle(lly, llx, ury, urx);
rect.rotation = rotation + 90;
rect.rotation %= 360;
return rect;
}
It swaps the x's and ys, and sets the rotation member.
In PdfDocument.newPage(), we find The Following Code:
// [U1] page size and rotation
int rotation = pageSize.getRotation();
...
PdfPage page = new PdfPage(new PdfRectangle(pageSize, rotation), thisBoxSize,
resources, rotation);
----
So rotation gets passed to the new PdfRectangle and to the new PdfPage:
public PdfRectangle(float llx, float lly, float urx, float ury, int rotation) {
super();
if (rotation == 90 || rotation == 270) {
this.llx = lly;
this.lly = llx;
this.urx = ury;
this.ury = urx;
}
else {
this.llx = llx;
this.lly = lly;
this.urx = urx;
this.ury = ury;
}
super.add(new PdfNumber(this.llx));
super.add(new PdfNumber(this.lly));
super.add(new PdfNumber(this.urx));
super.add(new PdfNumber(this.ury));
}
----
PdfRectangle swaps the coordinates *again*. It doesn't store the rotation
value, just makes use of it.
And...
PdfPage(PdfRectangle mediaBox, HashMap<String, PdfRectangle> boxSize,
PdfDictionary resources, int rotate) {
super(PAGE);
this.mediaBox = mediaBox;
put(PdfName.MEDIABOX, mediaBox);
put(PdfName.RESOURCES, resources);
if (rotate != 0) {
put(PdfName.ROTATE, new PdfNumber(rotate)); // *** This is the only
place its used ***
}
for (int k = 0; k < boxStrings.length; ++k) {
PdfObject rect = boxSize.get(boxStrings[k]);
if (rect != null)
put(boxNames[k], rect);
}
}
----
So we've swapped it back, and stored the value in the PdfDictionary for the
page ONLY. It's not retrieved anywhere in PdfPage...
Ah! In PdfContent, the rotation is taken from the original Rectangle again and
used in a transformation matrix, just like Kev(in?) said.
So while swapping the rectangle coordinates twice is certainly ODD, it doesn't
look like there's anything genuinely broken in there... just an "Even Number of
Sign Errors". Those are fine as long as you find both of them. Finding one
and having the "correct" output anyway is a bit maddening. *twitch*
--Mark Storer
Senior Software Engineer
Cardiff.com
#include <disclaimer>
typedef std::Disclaimer<Cardiff> DisCard;
> -----Original Message-----
> From: trumpetinc [mailto:forum_...@trumpetinc.com]
> Sent: Tuesday, January 19, 2010 9:00 PM
> To: itext-questions@lists.sourceforge.net
> Subject: Re: [iText-questions] Rotate Page After Adding Text
> to Document
>
>
>
> As a point of clarification, I'm pretty sure that, in
> addition to swapping
> width and height, rotate() signals PdfDocument to add a
> rotation cm entry to
> the beginning of the content stream, and adjusts the rotation
> dictionary
> entry for the page.
>
> And I completely agree with the 'messy code for dealing with
> it' comment.
> As an example, ImportedPage doesn't preserve the page
> rotation from the
> source, which can cause all sorts of mayhem (esp because the
> page rotation
> implies an awkward change in origin).
>
> - K
>
>
> Mark Storer-2 wrote:
> >
> > Ah. So you don't want to spin-the-pages-contents-sideways, you want
> > landscape-vs-portrait.
> >
> > "Rotation" isn't the word you want. You just want to
> change the page size
> > from 8.5x11 to 11x8.5. By the way, Rectangle.rotate()
> doesn't really
> > rotate the page either, it swaps the width/height. In PDF,
> there's a
> > concept of page rotation indepentant of a page's physical
> dimensions,
> > which can lead to all manner of Interesting Confusion (and
> messy code for
> > dealing with it).
> >
> >
>
> --
> View this message in context:
http://old.nabble.com/Rotate-Page-After-Adding-Text-to-Document-tp27234067p27236838.html
Sent from the iText - General mailing list archive at Nabble.com.
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world's best and brightest in the field, creating opportunities for Conference
attendees to learn about information security's most important issues through
interactions with peers, luminaries and emerging and established companies.
http://p.sf.net/sfu/rsaconf-dev2dev
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https://lists.sourceforge.net/lists/listinfo/itext-questions
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