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pathbuilder: Add gsk_path_builder_add_layout

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This api makes it easy to turn text into a path that
can be further manipulated.

The implementation currently goes via cairo.
This commit is contained in:
Matthias Clasen
2020-12-27 00:59:02 -05:00
parent b148c792ca
commit a8aa460330
2 changed files with 36 additions and 0 deletions
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32
gsk/gskpathbuilder.c
View File

@@ -930,3 +930,35 @@ gsk_path_builder_svg_arc_to (GskPathBuilder *builder,
t);
}
}
/**
* gsk_path_builder_add_layout:
* @builder: a `GskPathBuilder`
* @layout: the pango layout to add
*
* Adds the outlines for the glyphs in @layout to @builder.
*/
void
gsk_path_builder_add_layout (GskPathBuilder *builder,
PangoLayout *layout)
{
cairo_surface_t *surface;
cairo_t *cr;
cairo_path_t *cairo_path;
GskPath *path;
surface = cairo_recording_surface_create (CAIRO_CONTENT_COLOR_ALPHA, NULL);
cr = cairo_create (surface);
pango_cairo_layout_path (cr, layout);
cairo_path = cairo_copy_path_flat (cr);
path = gsk_path_new_from_cairo (cairo_path);
gsk_path_builder_add_path (builder, path);
gsk_path_unref (path);
cairo_path_destroy (cairo_path);
cairo_destroy (cr);
cairo_surface_destroy (surface);
}

4
gsk/gskpathbuilder.h
View File

@@ -123,6 +123,10 @@ void gsk_path_builder_rel_conic_to (GskPathBuilder
GDK_AVAILABLE_IN_ALL
void gsk_path_builder_close (GskPathBuilder *builder);
GDK_AVAILABLE_IN_ALL
void gsk_path_builder_add_layout (GskPathBuilder *builder,
PangoLayout *layout);
G_END_DECLS
#endif /* __GSK_PATH_BUILDER_H__ */