RGtk2: cairoScaledFontGlyphExtents – R documentation

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cairoScaledFontGlyphExtents

Description

Gets the extents for a list of glyphs. The extents describe a user-space rectangle that encloses the "inked" portion of the glyphs, (as they would be drawn by cairoShowGlyphs if the cairo graphics state were set to the same font_face, font_matrix, ctm, and font_options as scaled.font). Additionally, the x_advance and y_advance values indicate the amount by which the current point would be advanced by cairoShowGlyphs.

Usage

cairoScaledFontGlyphExtents(scaled.font, glyphs, num.glyphs)

Arguments

`scaled.font`	[`CairoScaledFont`] a `CairoScaledFont`
`glyphs`	[`CairoGlyph`] a list of glyph IDs with X and Y offsets.
`num.glyphs`	[integer] the number of glyphs in the `glyphs` list

Details

Note that whitespace glyphs do not contribute to the size of the rectangle (extents.width and extents.height).

Value

A list containing the following elements:

extents

[CairoTextExtents] a CairoTextExtents which to store the retrieved extents.

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