I fixed a bug yesterday where FreeType was sometimes failing to scale advances for glyphs, this might be the same issue.
If you have a source build of 4.16 you could try out the fix to confirm?
In Engine\Source\Runtime\SlateCore\Private\Fonts\FontCacheFreeType.cpp FFreeTypeAdvanceCache::FindOrCache…
replace:
FreeTypeUtils::ApplySizeAndScale(InFace, InFontSize, InFontScale);
with:
FreeTypeUtils::ApplySizeAndScale(InFace, InFontSize, 1.0f);
after:
if (Error == 0)
{
add
// We apply our own scaling as FreeType doesn't always produce the correct results for all fonts when applying the scale via the transform matrix
const FT_Long FixedFontScale = FreeTypeUtils::ConvertPixelTo16Dot16<FT_Long>(InFontScale);
OutCachedAdvance = FT_MulFix(OutCachedAdvance, FixedFontScale);
Since switching to UE 4.16, all my UMG text blocks using the “Roboto Light” font look wrong when the UI is not shown at 1:1 scale (both in the UMG editor and in game). All other font styles (regular, italic etc.) look fine. I’ve attached an image illustrating the issue with a regular font TextBlock above and a light font TextBlock below:
I’m not currently on a source build but I could switch if it helps clearing up the issue.
Ok I can confirm that this fixes it, thanks a lot for the quick reaction! Will the fix end up in 16.1?
I missed the 4.16.1 cutoff, but it’s in the 4.16 release branch now so will be part of 4.16.2.
