diff options
Diffstat (limited to 'src/cairo-stroke-style.c')
| -rw-r--r-- | src/cairo-stroke-style.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/src/cairo-stroke-style.c b/src/cairo-stroke-style.c index 3ebaf01..51c9414 100644 --- a/src/cairo-stroke-style.c +++ b/src/cairo-stroke-style.c @@ -127,6 +127,45 @@ _cairo_stroke_style_max_distance_from_path (const cairo_stroke_style_t *style, } } +void +_cairo_stroke_style_max_line_distance_from_path (const cairo_stroke_style_t *style, + const cairo_path_fixed_t *path, + const cairo_matrix_t *ctm, + double *dx, double *dy) +{ + double style_expansion = 0.5 * style->line_width; + if (_cairo_matrix_has_unity_scale (ctm)) { + *dx = *dy = style_expansion; + } else { + *dx = style_expansion * hypot (ctm->xx, ctm->xy); + *dy = style_expansion * hypot (ctm->yy, ctm->yx); + } +} + +void +_cairo_stroke_style_max_join_distance_from_path (const cairo_stroke_style_t *style, + const cairo_path_fixed_t *path, + const cairo_matrix_t *ctm, + double *dx, double *dy) +{ + double style_expansion = 0.5; + + if (style->line_join == CAIRO_LINE_JOIN_MITER && + ! path->stroke_is_rectilinear && + style_expansion < M_SQRT2 * style->miter_limit) + { + style_expansion = M_SQRT2 * style->miter_limit; + } + + style_expansion *= style->line_width; + + if (_cairo_matrix_has_unity_scale (ctm)) { + *dx = *dy = style_expansion; + } else { + *dx = style_expansion * hypot (ctm->xx, ctm->xy); + *dy = style_expansion * hypot (ctm->yy, ctm->yx); + } +} /* * Computes the period of a dashed stroke style. * Returns 0 for non-dashed styles. |