On 12/17/23 12:49 PM, John Neffenger wrote:
That's pretty nasty. Let's enable hinting (FT_LOAD_NO_BITMAP):
https://ataxia.io7m.com/2023/12/12/droid_12_hinting_nobitmaps.png
Here you can really see the effect of the slight vertical-only hinting.
I zoomed in on the images, and seeing no color fringes, I now realize
that you ran the tests with FT_LOAD_TARGET_NORMAL instead of the default
FT_LOAD_TARGET_LCD. You did mention that you would "assume" the NORMAL
setting, but I missed that you actually ran the tests that way.
So the vertical-only hinting is not due to the change in FreeType 2.8
for FT_LOAD_TARGET_LCD. It's some other reason -- perhaps due to the
hints themselves. This is now beyond my level of competence. :-)
All the more reason to change just one setting at a time. Just letting
people enable hinting introduces all these variables:
- native hinter vs. auto-hinter,
- native OpenType/CFF driver vs. native TrueType driver,
- whether the native driver and font both support
vertical-grid-only-snapping,
- the font choice itself and the quality of its hints.
It's enough to make your head spin. No single developer could possibly
test all this, and it makes a small set of examples almost worthless.
Nevertheless, we know it can work because the JDK has enabled hinting
for years, if not decades, so maybe just one step at a time. Otherwise,
we could be swamped with such a confusion of feedback that it would be
impossible to interpret it all.
John
