CODEWITHSUNDEEP
pdfpdftron
Stalso
Stalso

Reputation: 1484

PDFTron. FreeText annotation font

I need to get font information (font family, color e.t.c) from FreeText annotation using PDFTron in .Net. And I see only FreeText.GetFontSize method. How can I get font information of FreeText annotation?

Upvotes: 2

Views: 1311

Answers (1)

Ryan
Ryan

Reputation: 2570

If an appearance stream is present, then parsing the appearance stream with the ElementReader interface returns the fonts actually used for the appearance. So in one sense this is the most accurate check.

To check for appearance call Annot.GetAppearance() != null

If there is no appearance present, then either you could generate the appearance and check then, though this modifies the PDF which is not always desired.

If no appearance stream is present, then you first check the DS entry, which is a CSS string. For example:

font: 'Comic Sans MS',sans-serif 12.0pt; text-align:left; color:#E52237

If DS is not present, than the DA is required.

0 G 0.898 0.1333 0.2157 rg 0 Tc 0 Tw 100 Tz 0 TL 0 Ts 0 Tr /ComicSansMS 12 Tf

These are PDF graphics operators, essentially you parse the string and look for Tf and the previous two operands are font and font size.

For example

SDF.Obj ds = Annot.GetSDFOjb().FindObj("DS");
if(ds != null) string ds_str = ds.GetAsPDFText();

Upvotes: 1

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