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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