Bug 572805

Summary:

[Cocoa] GC.drawString(), GC.drawText() and FontMetrics ignore leading

Product:

[Eclipse Project] Platform

Reporter:

Stefan Mücke <s.muecke>

Component:

SWT

Assignee:

Platform-SWT-Inbox <platform-swt-inbox>

Status:

NEW ---

QA Contact:

Severity:

normal

Priority:

CC:

ts-swt

Version:

4.19

Target Milestone:

---

Hardware:

OS:

Mac OS X

Whiteboard:

Attachments:

Description	Flags
Snippet to reproduce	none
Screenshot on macOS and Windows 7	none

Description Stefan Mücke

2021-04-13 09:24:12 EDT

Created attachment 286092 [details]
Snippet to reproduce

On macOS, FontMetrics.getLeading() always returns zero. GC.drawString() and GC.drawText() don't seem to take leading into account. Tested with Eclipse 4.19 and the very old 4.8.

I first noticed this problem with the "SBL Hebrew" font that has a large leading value (font is available here: https://www.sbl-site.org/Fonts/SBL_Hbrw.ttf).

To reproduce, run the attached snippet. For comparison with Windows, see attached sceenshot.

This is a serious problem because text is drawn outside the computed bounds. When clipping is used (e.g. in Draw2D), text will be partially cut off. I would be very grateful if this could be fixed for 4.20 M2.

Comment 1 Stefan Mücke

2021-04-13 09:28:21 EDT

Created attachment 286093 [details]
Screenshot on macOS  and Windows 7

This problem doesn't seem to depend on the macOS version and is at least present on 10.13 (High Sierra) and 11.0 (Big Sur).