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Fix polygon redrawing -- #8148

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Polygons used PolyLine::render() to render the path.
However since 7bb8ca1e76, the PolyLine path is constrained
(for automation lanes), and closed shaped polygons were not
always completely redrawn.
This commit is contained in:
Robin Gareus 2020-07-09 02:10:28 +02:00
parent 4d76388b8d
commit ce8846d13f
Signed by: rgareus
GPG Key ID: A090BCE02CF57F04
1 changed files with 14 additions and 6 deletions
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20
libs/canvas/polygon.cc
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@ -46,15 +46,23 @@ Polygon::~Polygon ()
void
Polygon::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
{
Points::size_type npoints = _points.size();
if (npoints < 2) {
return;
}
if (_outline || _fill) {
render_path (area, context);
const double pixel_adjust = (_outline_width == 1.0 ? 0.5 : 0.0);
if (!_points.empty ()) {
/* close path */
Duple p = item_to_window (Duple (_points.front().x, _points.front().y));
context->line_to (p.x, p.y);
for (Points::size_type i = 0; i < npoints; i++) {
Duple c = item_to_window (Duple (_points[i].x, _points[i].y));
if (i == 0) {
context->move_to (c.x + pixel_adjust, c.y + pixel_adjust);
} else {
context->line_to (c.x + pixel_adjust, c.y + pixel_adjust);
}
}
context->close_path ();
}
if (_outline) {