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path: Drop degenerate line_to in _cairo_path_fixed_curve_to

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When a degenerate line_to is followed by a curve_to operation, the
line_to can be safely dropped, just like for degenerate line_to
followed by line_to.
This commit is contained in:
Andrea Canciani 2010-10-17 14:10:58 +02:00
parent 2352b48f9e
commit a2ac91eb5f
1 changed files with 11 additions and 0 deletions
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11
src/cairo-path-fixed.c
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@ -594,6 +594,17 @@ _cairo_path_fixed_curve_to (cairo_path_fixed_t *path,
return status;
}
/* If the previous op was a degenerate LINE_TO, drop it. */
if (_cairo_path_fixed_last_op (path) == CAIRO_PATH_OP_LINE_TO) {
const cairo_point_t *p;
p = _cairo_path_fixed_penultimate_point (path);
if (p->x == path->current_point.x && p->y == path->current_point.y) {
/* previous line element was degenerate, replace */
_cairo_path_fixed_drop_line_to (path);
}
}
point[0].x = x0; point[0].y = y0;
point[1].x = x1; point[1].y = y1;
point[2].x = x2; point[2].y = y2;