RGtk2: pangoFontGetGlyphExtents – R documentation

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pangoFontGetGlyphExtents

Description

Gets the logical and ink extents of a glyph within a font. The coordinate system for each rectangle has its origin at the base line and horizontal origin of the character with increasing coordinates extending to the right and down. The functions pangoAscent(), pangoDescent(), pangoLbearing(), and pangoRbearing() can be used to convert from the extents rectangle to more traditional font metrics. The units of the rectangles are in 1/PANGO_SCALE of a device unit.

Usage

pangoFontGetGlyphExtents(object, glyph)

Arguments

`object`	[`PangoFont`] a `PangoFont`
`glyph`	[numeric] the glyph index

Details

If font is NULL, this function gracefully sets some sane values in the output variables and returns.

Value

A list containing the following elements:

`ink.rect`	[`PangoRectangle`] rectangle used to store the extents of the glyph as drawn or `NULL` to indicate that the result is not needed.
`logical.rect`	[`PangoRectangle`] rectangle used to store the logical extents of the glyph or `NULL` to indicate that the result is not needed.

Author(s)

Derived by RGtkGen from GTK+ documentation

RGtk2

R Bindings for Gtk 2.8.0 and Above

v2.20.36

GPL

Authors

Michael Lawrence <michafla@gene.com> and Duncan Temple Lang <duncan@wald.ucdavis.edu>

Initial release