From cf1ce8494dbba21b41a7963cf19aed6338a64145 Mon Sep 17 00:00:00 2001 From: Hugo Locurcio Date: Sat, 2 Jul 2022 18:45:42 +0200 Subject: [PATCH] Improve antialiased line drawing sharpness and respect of original width Antialiased lines with a width of 2 pixels or more now use a smaller feather width of 1.25 instead of 2.0. This makes them look sharper and better preserves their original shape while still having good antialiasing quality. This also improves the appearance of thin antialiased lines by slightly increasing their feather size (from 1.0 to 1.25). It makes them appear a tad thicker, but the antialiasing quality is much improved by doing this. --- servers/rendering/renderer_canvas_cull.cpp | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-) diff --git a/servers/rendering/renderer_canvas_cull.cpp b/servers/rendering/renderer_canvas_cull.cpp index bc1e8eb348b..774c133e860 100644 --- a/servers/rendering/renderer_canvas_cull.cpp +++ b/servers/rendering/renderer_canvas_cull.cpp @@ -594,9 +594,13 @@ void RendererCanvasCull::canvas_item_add_line(RID p_item, const Point2 &p_from, } if (p_antialiased) { - float border_size = 2.0; - if (p_width < border_size) { - border_size = p_width; + // Use the same antialiasing feather size as StyleBoxFlat's default + // (but doubled, as it's specified for both sides here). + // This value is empirically determined to provide good antialiasing quality + // while not making lines appear too soft. + float border_size = 1.25f; + if (p_width < 1.0f) { + border_size *= p_width; } Vector2 dir2 = diff.normalized(); @@ -763,9 +767,13 @@ void RendererCanvasCull::canvas_item_add_polyline(RID p_item, const Vector