cairo_user_scaled_font_render_glyph_func_t
for details of how the callback
works.cairoUserFontFaceSetRenderGlyphFunc(font.face, render.glyph.func)
font.face
CairoFontFace
] A user font facerender.glyph.func
NULL
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