That code looks kosher to me. It may be that you're running into a bug in
Acrobat's imaging model. If I'm following things correctly, your output will
look something like:
---
/foo 8 Tf %%cb.setFontAndSize()
q %%cb.saveState()
<stuff>
Q %%cb.restoreState();
BT %%cb.beginText();
<more stuff>
ET %%cb.endText();
---
That "Tf" (set the font and size) operator is really only valid inside a
beginText/endText block. Given your later comments, it sounds like this will
work and be valid:
public void outerMethod(PdfContentByte cb, BaseFont font) {
cb.beginText();
cb.setFontAndSize(font.getBaseFont(), 8);
cb.endText();
//the rest is left alone
...
}
Poking around in the PDF Reference I don't see anything specifically stating
that text state commands like 'Tf' (aka setFontAndSize()) are illegal outside
BT/ET. Chapter 5 covers text as a whole, and BT/ET starts being definied at
5.3, though it is mentioned earlier. All the samples presented wrap all
text-related operations with BT/ET. 5.3 mentions several things that are only
valid within BT/ET, but these are confined to commands introduced in that
section. No mention of text state commands is made, for or against.
BTW: Just about every PdfContentByte call directly translates to a PDF
graphic. A call to a PdfContentByte function writes various parameters and
commands into the internal byte array. Some of them do additional work for
you (handling resources like fonts and images for you), others are provided for
convenience (there's no 'circle' command, so they must be simulated with a
collection of curveTo's). There's no storing of calls to be written later...
...But how those parameters and commands are interpretted by the application
drawing them is another matter entirely.
You'll also notice that I've been typing "parameters and commands". PDF uses
"reverse polish notation": param param command.
So addition (which doesn't happen in PDF, but makes for a universally
understood example) looks like "2 2 +" instead of "2 + 2". It turns out that
this notation is relatively easy to build in a computer.
--Mark Storer
Senior Software Engineer
Cardiff Software
#include <disclaimer>
typedef std::Disclaimer<Cardiff> DisCard;
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] Behalf
> Of Darryl
> Miles
> Sent: Wednesday, May 17, 2006 5:09 AM
> To: [email protected]
> Subject: Re: [iText-questions] Storing a PdfContentByte state ?
>
>
> Paulo Soares wrote:
> > PdfContentByte.saveState() saves everything including the
> font, matrix,
> > colors, etc.
>
> Hmm... ok, I get unexpected output (when viewed from Acrobat
> 7.0.7) if I
> don't explicitly reset the PdfContentByte.setFontAndSize() at
> a point I
> expected restoreState() to have reset the font back to what
> is was before.
>
>
> My innerMethod function is actually an implementation of
> SMALL CAPS for
> lowercased characters of the passed string, but I have
> simplified it in
> this example.
>
>
> Code goes something like:
>
>
> public void outerMethod(PdfContentByte cb, BaseFont font) {
> cb.setFontAndSize(font.getBaseFont(), 8);
>
> innerMethod(cb, font.getBaseFont(),
> PdfContentByte.ALIGN_RIGHT, 8, 6,
> "abcDEF", colOneIndentX, thisLineY, 0);
> cb.setFontAndSize(font.getBaseFont(), 8); // Restore font
> info from
> calling #innerMethod() this is the call I'm not expecting to
> need to make
>
> cb.beginText();
> // This is the text that which ends up in the wrong place,
> by around
> 6pts east when a 6pt/smallSize font got selected inside innerMethod
> cb.showTextAligned(PdfContentByte.ALIGN_LEFT, "Some Data",
> colTwoIndentX, thisLineY, 0);
> cb.endText();
> }
>
>
> public void innerMethod(PdfContentByte cb, BaseFont baseFont,
> int align,
> float bigSize, float smallSize, String s, float x, float y, float a) {
> cb.saveState();
> cb.beginText();
> float fontSize = bigSize;
> if(Ctype.islower(s.charAt(0)))
> fontSize = smallSize;
> float charSpacing = 1.0f;
> cb.moveText(x, y); // Simplyfied example of ALIGN_LEFT
> cb.setFontAndSize(baseFont, fontSize);
> cb.setCharacterSpacing(charSpacing);
> cb.showText(s.charAt(0));
> cb.endText();
> cb.restoreState();
> }
>
>
> Maybe there is somewhere I can attach a test case if anyone is
> interested. For now I just make the extra call to
> cb.setFontAndSize()
> after any call to innerMethod().
>
>
>
> Adding:
>
> cb.beginText();
> cb.endText();
>
> after the first cb.setFontAndSize() also fixes the output to what I
> expect. I can't do saveState() after beginText() I get an
> error/warning
> in acrobat.
>
> Maybe a "setfont" isn't called until cb.beginText(), which means the
> graphics state is not setup. I'm not sure what iText's goals are
> aligning with PDF/PS syntax or being programtically intuitive.
>
>
> Thanks for your clarification,
>
> Darryl
>
>
> -------------------------------------------------------
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> services, security?
> Get stuff done quickly with pre-integrated technology to make
> your job easier
> Download IBM WebSphere Application Server v.1.0.1 based on
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> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&;
dat=121642
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-------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid0709&bid&3057&dat1642
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