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User Fonts

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Font support with font data provided by the user

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<para>
The user-font feature allows the cairo user to provide drawings for glyphs
in a font.  This is most useful in implementing fonts in non-standard
formats, like SVG fonts and Flash fonts, but can also be used by games and
other application to draw "funky" fonts.

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</para>

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<para>

</para>

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<!-- ##### MACRO CAIRO_HAS_USER_FONT ##### -->
<para>
Defined if the user font backend is available.
This macro can be used to conditionally compile backend-specific code.
The user font backend is always built in versions of cairo that support
this feature (1.8 and later).
</para>

@Since: 1.8


<!-- ##### USER_FUNCTION cairo_user_scaled_font_init_func_t ##### -->
<para>

</para>

@scaled_font: 
@cr: 
@extents: 
@Returns: 


<!-- ##### USER_FUNCTION cairo_user_scaled_font_render_glyph_func_t ##### -->
<para>

</para>

@scaled_font: 
@glyph: 
@cr: 
@extents: 
@Returns: 


<!-- ##### USER_FUNCTION cairo_user_scaled_font_text_to_glyphs_func_t ##### -->
<para>

</para>

@scaled_font: 
@utf8: 
@utf8_len: 
@glyphs: 
@num_glyphs: 
@clusters: 
@num_clusters: 
@cluster_flags: 
@Returns: 


<!-- ##### USER_FUNCTION cairo_user_scaled_font_unicode_to_glyph_func_t ##### -->
<para>

</para>

@scaled_font: 
@unicode: 
@glyph_index: 
@Returns: 


<!-- ##### FUNCTION cairo_user_font_face_create ##### -->
<para>

</para>

@void: 
@Returns: 


<!-- ##### FUNCTION cairo_user_font_face_set_init_func ##### -->
<para>

</para>

@font_face: 
@init_func: 


<!-- ##### FUNCTION cairo_user_font_face_get_init_func ##### -->
<para>

</para>

@font_face: 
@Returns: 


<!-- ##### FUNCTION cairo_user_font_face_set_render_glyph_func ##### -->
<para>

</para>

@font_face: 
@render_glyph_func: 


<!-- ##### FUNCTION cairo_user_font_face_get_render_glyph_func ##### -->
<para>

</para>

@font_face: 
@Returns: 


<!-- ##### FUNCTION cairo_user_font_face_set_unicode_to_glyph_func ##### -->
<para>

</para>

@font_face: 
@unicode_to_glyph_func: 


<!-- ##### FUNCTION cairo_user_font_face_get_unicode_to_glyph_func ##### -->
<para>

</para>

@font_face: 
@Returns: 


<!-- ##### FUNCTION cairo_user_font_face_set_text_to_glyphs_func ##### -->
<para>

</para>

@font_face: 
@text_to_glyphs_func: 


<!-- ##### FUNCTION cairo_user_font_face_get_text_to_glyphs_func ##### -->
<para>

</para>

@font_face: 
@Returns: 


