public Region pango_layout_get_clip_region (Layout layout, int x_origin, int y_origin, int index_ranges, int n_ranges)
Obtains a clip region which contains the areas where the given ranges of text would be drawn.
y_origin are the top left point to center the layout.
index_ranges should contain ranges
of bytes in the layout’s text.
Note that the regions returned correspond to logical extents of the text ranges, not ink extents. So the drawn layout may in fact touch areas out of the clip region. The clip region is mainly useful for highlightling parts of text, such as when text is selected.
X pixel where you intend to draw the layout with this clip
Y pixel where you intend to draw the layout with this clip
array of byte indexes into the layout, where even members of array are start indexes and odd elements are end indexes
number of ranges in
a clip region containing the given ranges