Right PDF SDK provides APIs that enable users to determine the font style, width, bounding box, and the way to order font value, and also to count and embed fonts into a PDF document. Note that ZSFont_Create needs to be called in advance to allow APIs to work, and use ZSFont_Release to end the entire action. Here are some common APIs for font setting listed in Table 3.7. For a complete list of APIs, please refer to ZSFont.h.

Table 3.7

  API Name Description
1 ZSFont_Create Create a font with the given attributes.
2 ZSFont_Release Release a font object.
3 ZSFont_IsBold Detect whether a font object is bold or not.
4 ZSFont_GetAscent Get an ascent value of a font.
5 ZSFont_GetDescent Get a descent value of a font.
6 ZSFont_GetCharBBox Get a specific character bounding box of a font.
7 ZSFont_GetCharWidth Get a specific character width of a font.
8 ZSFont_IsEmbedded Check whether a font is embedded in a PDF document.
9 ZSFont_GetDict Get the dictionary of a font in a PDF document.
10 ZSFont_NumFonts Count all the PDF fonts in the document, which enumerates all the font resources for pages, annots, and AcroForm.
11 ZSFont_EmbedFont Embed a font into a PDF document.

 

This is an example of getting an ascent/ descent value of a font and the width of a certain character.

Example: Get an ascent/descent value of a font and the width of the character “A”

ZSFont font;
ZSFont_Create(&fontname, ZS_FONTSTYLE_FIXEDPITCH, 0, ZS_CHARSET_CHINESEBIGS, &font);

ZSFont_GetAscent(font, &ascent);
ZSFont_GetDescent(font, &descent);
ZSFont_GetCharWidth(font, ‘A’, &width);

ZSDoc_EmbedFont(doc, font);
ZSFont_Release(font);

 

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