diff options
| author | Paul Davis <paul@linuxaudiosystems.com> | 2014-02-12 15:26:53 -0500 |
|---|---|---|
| committer | Paul Davis <paul@linuxaudiosystems.com> | 2014-02-12 15:26:53 -0500 |
| commit | f5499d206a8b77340e5466fadfd2d087eb9cd67e (patch) | |
| tree | 200e6a3bf56fc0ee1b99b8beacf6e10540c6fd66 /libs/canvas/line.cc | |
| parent | e247103a7ec747d3e4a56b8cc51515e8600c2d78 (diff) | |
slight code tidy for Line::render() ... don't use 0.5 pixel adjustment if the line width > 1.0
Diffstat (limited to 'libs/canvas/line.cc')
| -rw-r--r-- | libs/canvas/line.cc | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/libs/canvas/line.cc b/libs/canvas/line.cc index 61acf89252..09f9061c85 100644 --- a/libs/canvas/line.cc +++ b/libs/canvas/line.cc @@ -60,11 +60,17 @@ Line::render (Rect const & /*area*/, Cairo::RefPtr<Cairo::Context> context) cons Duple p0 = item_to_window (Duple (_points[0].x, _points[0].y)); Duple p1 = item_to_window (Duple (_points[1].x, _points[1].y)); - /* See Cairo FAQ on single pixel lines to understand why we add 0.5 - */ + if (_outline_width <= 1.0) { + /* See Cairo FAQ on single pixel lines to understand why we add 0.5 + */ + + const Duple half_a_pixel (0.5, 0.5); + p0 = p0.translate (half_a_pixel); + p1 = p1.translate (half_a_pixel); + } - context->move_to (p0.x + 0.5, p0.y + 0.5); - context->line_to (p1.x + 0.5, p1.y + 0.5); + context->move_to (p0.x, p0.y); + context->line_to (p1.x, p1.y); context->stroke (); } |