1299637 - Fonts too thin after skia was introduced to Windows in bug 1007702

Status: RESOLVED INVALID

(Thunderbird :: General, defect)

Description

[Jorg K (CEST = GMT+2)]

Attachment: 2016-09-01 00_05_56.png

Fonts too thin after skia was introduced to Windows in bug 1007702.

See attachment: Left and middle: Exported message as HTML and viewed in FF, 48 and Nightly 51, Courier New, 14px.

Right, the same message in TB 51 Daily of today, new profile, so I didn't mess up any preferences.

If I remove "skia" from these preferences
  gfx.content.azure.backends
  gfx.canvas.azure.backends
it goes back to normal.

Comment 1

[Jorg K (CEST = GMT+2)]

Attachment: 1299637.patch

I carefully compared the gfx.* preferences of FF 51 Nightly and TB 51 Daily, and bingo, gfx.direct2d.disabled was different. Resetting this makes the fonts become good again.

So I think we need to follow FF here and remove the special setting.

Comment 2

[Jorg K (CEST = GMT+2)]

Hmm, or perhaps this is wrong. The fonts only look good when hardware acceleration is turned on and with gfx.direct2d.disabled set to false.

Comment 3

[Jorg K (CEST = GMT+2)]

Sorry, I've got it now. With FF 48 the fonts look OK even with HWA switched off, with FF 51 they look bad with HWA off, that's the difference, same in TB.