RGtk2: cairoUserFontFaceSetRenderGlyphFunc – R documentation

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cairoUserFontFaceSetRenderGlyphFunc

Description

Sets the glyph rendering function of a user-font. See cairo_user_scaled_font_render_glyph_func_t for details of how the callback works.

Usage

cairoUserFontFaceSetRenderGlyphFunc(font.face, render.glyph.func)

Arguments

`font.face`	[`CairoFontFace`] A user font face
`render.glyph.func`	[cairo_user_scaled_font_render_glyph_func_t] The render_glyph callback, or `NULL`

Details

The font-face should not be immutable or a CAIRO_STATUS_USER_FONT_IMMUTABLE error will occur. A user font-face is immutable as soon as a scaled-font is created from it.

The render_glyph callback is the only mandatory callback of a user-font. If the callback is NULL and a glyph is tried to be rendered using font.face, a CAIRO_STATUS_USER_FONT_ERROR will occur. Since 1.8

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