If you want to do all by yourself look at the code that I pointed to, all the
transformations are there. If you want to let iText do the work for you use
ColumnText.ShowTextAligned(), it supports PdfContentByte, and use a Font with a
Font.ITALIC style, and the slanting will be done for free.
Paulo
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On
> Behalf Of irashkin
> Sent: Wednesday, September 17, 2008 4:32 PM
> To: [email protected]
> Subject: Re: [iText-questions] pseudo-italic (transform)
> causing horizontal offset
>
>
> I also need PDFContentByte writing because I have to have absolute
> positioning for every element.
>
> irashkin wrote:
> >
> > Thanks for the quick reply! I didn't think I was able to
> use chunks with
> > PDfContentByte directly. Is that true? I have to use
> PDFContentByte (I am
> > pretty sure anyway...) because of a bunch of other graphic
> things I am
> > doing.
> >
> >
> >
> > Paulo Soares-3 wrote:
> >>
> >> Look for Chunk.SKEW in PdfDocument.WriteLineToContent().
> >>
> >> Paulo
> >>
> >>> -----Original Message-----
> >>> From: [EMAIL PROTECTED]
> >>> [mailto:[EMAIL PROTECTED] On
> >>> Behalf Of irashkin
> >>> Sent: Wednesday, September 17, 2008 3:20 PM
> >>> To: [email protected]
> >>> Subject: [iText-questions] pseudo-italic (transform) causing
> >>> horizontal offset
> >>>
> >>>
> >>> Hi,
> >>> I am actually using iTextSharp, but I don't know if this
> >>> problem is specific
> >>> to iTextSharp or is a general problem (or misunderstanding by
> >>> me) of iText.
> >>> I am working with some embedded fonts that don't have italic
> >>> options. So, to
> >>> get around this, I am doing a skew transformation, and the
> >>> italicization
> >>> looks ok. But it is offsetting the x value as well, even
> >>> though I am passing
> >>> 0 for x and y (e and f) values in my matrix.
> >>> In other words, I am doing something like this:
> >>>
> >>> float x = 28F;
> >>> float y = 100F;
> >>> float italicization = xFontSize / 100F;
> >>> Matrix m = new Matrix(1F, 0F, italicization, 1F, 0F, 0F);
> >>> cb.Transform(m);
> >>> cb.ShowTextAligned(0, Content[i].Trim(), x, y, 0F);
> >>> m = new Matrix(1F, 0F, 0F-italicization, 1F, 0F, 0F);
> >>> cb.Transform(m);
> >>> cb.ShowTextAligned(0, Content[i].Trim(), x, y, 0F);
> >>>
> >>> so, first I write the string (Content[i]) in pseudo-italics,
> >>> then transform
> >>> back to original and write it un0-italicized for comparison.
> >>> The offset varies, but depending (I think) on font size and
> >>> maybe also on
> >>> string length, the offset is by 2 to 6 characters.
> >>>
> >>> I have been trying many combinations of italicization values,
> >>> offsetting x
> >>> by variable amounts, and so on, but I can't get this to come
> >>> out right.
> >>> I also tried this but it does exactly the same thing.:
> >>>
> >>> Matrix m = new Matrix(1F, 0F, italicization, 1F, x, 0F);
> >>> cb.Transform(m);
> >>> cb.ShowTextAligned(iAlign, Content[i].Trim(), 0F, y, 0F);
> >>> m = new Matrix(1F, 0F, 0F-italicization, 1F, 0F-x, 0F);
> >>> cb.Transform(m);
> >>> cb.ShowTextAligned(iAlign, Content[i].Trim(), x, y, 0F);
> >>>
> >>>
> >>> Interstingly,m I had this working, sort of - I was just
> doing this:
> >>>
> >>> cb.ConcatCTM(1F, 0F, italicization, 1F, 0F, 0F);
> >>> cb.SaveState();
> >>> cb.ShowTextAligned(0, Content[i].Trim(), x, y, 0F);
> >>> cb.RestoreState();
> >>>
> >>> and this was giving me good results, but was then causing
> a PDf error:
> >>> Illegal operation 'Q' inside a text object. (this all
> happens inside a
> >>> beginText()-endText() block, which I guess is not ok).
> >>>
> >>> Does anyone have any ideas about this? I am going crazy. I
> >>> can give you more
> >>> info as needed - I tried to give enough, but maybe not...
> >>>
> >>> Thanks,
> >>> Ian
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