>> (a) ignore changes of the horizontal advance widths due to hinting
>> instructions (not implemented yet), and
>>
>> (b) ensure that all instructions behave correctly even if the
>> horizontal resolution is increased (this is ClearType
>> compatibility mode, already implemented).
>
> Ah, okay :) is (a) so complicated or is it that simply nobody did
> the work yet?
It's the latter. A possible solution is to add a new FT_LOAD_XXX
flag.
> So I guess ClearType
>
> - without stem darkening: let font modify x-coordinates at will but
> ignore modifications to advance width
Yes, see above.
> - with stem-darkening: nop everything that deals with x-coordinates
> and embolden just the x-axis? Dave? The latter would make
> backwards compatibility irrelevant because we would only honor
> Y-hints anyway, right?
I think it's not that easy, since you have to correctly handle
diagonal moves. Instead, I can imagine that all hints are executed,
then the horizontal coordinates are reset to the unhinted ones, and
stem emboldening gets applied instead.
Werner
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