Function

Gdkpango_layout_get_clip_region

Declaration [src] 

cairo_region_t*
gdk_pango_layout_get_clip_region (
  PangoLayout* layout,
  int x_origin,
  int y_origin,
  const int* index_ranges,
  int n_ranges
)

Description [src]

Obtains a clip region which contains the areas where the given ranges of text would be drawn.

x_origin and 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.

This function is not directly available to language bindings.

Parameters

layout

Type: PangoLayout

A PangoLayout.

The data is owned by the caller of the function.
x_origin

Type: int

X pixel where you intend to draw the layout with this clip.

y_origin

Type: int

Y pixel where you intend to draw the layout with this clip.

index_ranges

Type: const int*

Array of byte indexes into the layout, where even members of array are start indexes and odd elements are end indexes.

The data is owned by the caller of the function.
n_ranges

Type: int

Number of ranges in index_ranges, i.e. half the size of index_ranges.

Return value

Type: cairo_region_t

A clip region containing the given ranges.

The caller of the function takes ownership of the data, and is responsible for freeing it.