diff options
| -rw-r--r-- | src/macos/Sources/PardesView.swift | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/src/macos/Sources/PardesView.swift b/src/macos/Sources/PardesView.swift index f64678ee..cd3ec980 100644 --- a/src/macos/Sources/PardesView.swift +++ b/src/macos/Sources/PardesView.swift @@ -531,6 +531,12 @@ private struct TaglineMetrics { let px = pardes_topbar_pane_border_px(cellPixels, bandPixels) return (CGFloat(cellPixels * UInt32(PARDES_TOPBAR_H)) - CGFloat(px / 2)) / scale } + + /// One physical pixel, in points. The rules separating discontinuous + /// context rows inside a body layer are a single pixel in the SDL shell, + /// so they are stated there and converted here rather than handing `scale` + /// out and letting the caller reinvent the conversion. + var contextBorderThickness: CGFloat { 1 / scale } } private func modifiers(_ flags: NSEvent.ModifierFlags) -> UInt32 { @@ -1362,8 +1368,11 @@ final class PardesView: NSView { if border != UInt32(PARDES_COLOR_DEFAULT) { for row in 0..<contexts { if value(11 + row) == 0 { continue } - fill(ctx, CGRect(x: left, y: top + CGFloat(row + 1)*taglines.height, - width: viewport.width, height: 1/taglines.scale), border, 1) + // The SDL shell paints this rule over the row's LAST pixel, not + // the next row's first one; keep the two shells on the same pixel. + let thickness = taglines.contextBorderThickness + fill(ctx, CGRect(x: left, y: top + CGFloat(row + 1)*taglines.height - thickness, + width: viewport.width, height: thickness), border, 1) } } ctx.restoreGState() |