cairo_status_t
_cairo_path_fixed_stroke_dashed_to_polygon (const cairo_path_fixed_t *path,
const cairo_stroke_style_t *stroke_style,
const cairo_matrix_t *ctm,
const cairo_matrix_t *ctm_inverse,
double tolerance,
cairo_polygon_t *polygon)
{
cairo_stroker_t stroker;
cairo_status_t status;
status = _cairo_stroker_init (&stroker, stroke_style,
ctm, ctm_inverse, tolerance);
if (unlikely (status))
return status;
stroker.add_external_edge = _cairo_polygon_add_external_edge,
stroker.closure = polygon;
if (polygon->num_limits)
_cairo_stroker_limit (&stroker, path,
polygon->limits, polygon->num_limits);
status = _cairo_path_fixed_interpret (path,
_cairo_stroker_move_to,
stroker.dash.dashed ?
_cairo_stroker_line_to_dashed :
_cairo_stroker_line_to,
_cairo_stroker_curve_to,
_cairo_stroker_close_path,
&stroker);
if (unlikely (status))
goto BAIL;
/* Cap the start and end of the final sub path as needed */
status = _cairo_stroker_add_caps (&stroker);
BAIL:
_cairo_stroker_fini (&stroker);
return status;
}
static cairo_status_t
_cairo_stroker_init (cairo_stroker_t *stroker,
const cairo_path_fixed_t *path,
const cairo_stroke_style_t *stroke_style,
const cairo_matrix_t *ctm,
const cairo_matrix_t *ctm_inverse,
double tolerance,
const cairo_box_t *limits,
int num_limits)
{
cairo_status_t status;
stroker->style = *stroke_style;
stroker->ctm = ctm;
stroker->ctm_inverse = ctm_inverse;
stroker->tolerance = tolerance;
stroker->ctm_determinant = _cairo_matrix_compute_determinant (stroker->ctm);
stroker->ctm_det_positive = stroker->ctm_determinant >= 0.0;
status = _cairo_pen_init (&stroker->pen,
stroke_style->line_width / 2.0,
tolerance, ctm);
if (unlikely (status))
return status;
stroker->has_current_face = FALSE;
stroker->has_first_face = FALSE;
stroker->has_initial_sub_path = FALSE;
_cairo_stroker_dash_init (&stroker->dash, stroke_style);
stroker->add_external_edge = NULL;
stroker->has_bounds = FALSE;
if (num_limits)
_cairo_stroker_limit (stroker, path, limits, num_limits);
return CAIRO_STATUS_SUCCESS;
}
