PDFNetAddFontSubst Method

AddFontSubst functions can be used to create font substitutes that can override default PDFNet font selection algorithm. These functions are useful in situations where referenced fonts are not present in the document and PDFNet font substitution algorithm is not producing desired results. AddFontSubst(fontname, fontpath) maps the given font name (i.e. 'BaseFont' entry from the font dictionary) to a font file. AddFontSubst(ordering, fontpath) maps the given character ordering (see Ordering entry in CIDSystemInfo dictionary; Section 5.6.2 in PDF Reference) to a font file. This method is less specific that the former variant of AddFontSubst, and can be used to override a range of missing fonts (or any missing font) with a predefined substitute. The following is an example of using these functions to provide user defined font substitutes:

Adds the font subst.