vcl/skia/gdiimpl.cxx | 9 +++++++++
1 file changed, 9 insertions(+)
New commits:
commit 7f7cfc333bca65a2290bb55354ba0b3abd53044c
Author: Patrick Luby <guibmac...@gmail.com>
AuthorDate: Mon Sep 2 09:58:53 2024 -0400
Commit: Ilmari Lauhakangas <ilmari.lauhakan...@libreoffice.org>
CommitDate: Mon Sep 2 20:44:54 2024 +0200
tdf#162646 suppress drawing hairlines when scaling
Previously, drawing hairlines (i.e. zero line width) was only
suppressed when running unit tests. But drawing hairlines causes
unexpected shifting of the lines when using a Retina display on
macOS and antialiasing is disabled.
Change-Id: I6e788099c110862afc1f7a085dfac4a2908ca51b
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/172742
Tested-by: Jenkins
Reviewed-by: Patrick Luby <guibomac...@gmail.com>
(cherry picked from commit bb1ce025ae6479bc3044197f25990d8c41ae09de)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/172753
Tested-by: Ilmari Lauhakangas <ilmari.lauhakan...@libreoffice.org>
Reviewed-by: Ilmari Lauhakangas <ilmari.lauhakan...@libreoffice.org>
diff --git a/vcl/skia/gdiimpl.cxx b/vcl/skia/gdiimpl.cxx
index eaed2d7c99b7..f7a9dda2db84 100644
--- a/vcl/skia/gdiimpl.cxx
+++ b/vcl/skia/gdiimpl.cxx
@@ -1105,9 +1105,18 @@ bool SkiaSalGraphicsImpl::drawPolyLine(const
basegfx::B2DHomMatrix& rObjectToDev
// Adjust line width for object-to-device scale.
fLineWidth = (rObjectToDevice * basegfx::B2DVector(fLineWidth,
0)).getLength();
+#ifdef MACOSX
+ // tdf#162646 suppressing drawing hairlines when scaling
+ // Previously, drawing of hairlines (i.e. zero line width) was only
+ // suppressed when running unit tests. But drawing hairlines causes
+ // unexpected shifting of the lines when using a Retina display on
+ // macOS and antialiasing is disabled.
+ if (fLineWidth == 0 && mScaling != 1 && (isUnitTestRunning() ||
!mParent.getAntiAlias()))
+#else
// On HiDPI displays, do not draw hairlines, draw 1-pixel wide lines in
order to avoid
// smoothing that would confuse unittests.
if (fLineWidth == 0 && mScaling != 1 && isUnitTestRunning())
+#endif
fLineWidth = 1; // this will be scaled by mScaling
// Transform to DeviceCoordinates, get DeviceLineWidth, execute
PixelSnapHairline
