Reference Manual - 0.9.25
DirectFB Interfaces   IDirectFBFont

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Methods of IDirectFBFont
Retrieving information GetAscender Get the distance from the baseline to the top of the logical extents of this font.
GetDescender Get the distance from the baseline to the bottom of the logical extents of this font.
GetHeight Get the logical height of this font. This is the vertical distance from one baseline to the next when writing several lines of text. Note that this value does not correspond the height value specified when loading the font.
GetMaxAdvance Get the maximum character width.
GetKerning Get the kerning to apply between two glyphs specified by their Unicode indices.
String extents measurement GetStringWidth Get the logical width of the specified UTF-8 string as if it were drawn with this font.
GetStringExtents Get the logical and real extents of the specified UTF-8 string as if it were drawn with this font.
GetGlyphExtents Get the extents of a glyph specified by its Unicode index.