Re: [ft] : Microsoft YaHei UI font can't be displayed well

[datao zhang]

I only want to show how it is grid fit in fontlab. Maybe that is not an good example if freetype do similar things in B/W mode. 
 
I can't find the cleartype hinting option in fontlab tools. So i take cleartype rasterized  screenshot from Excel 12px-26px. I also take 2 screenshot from VTT tools for 12px and 14 px. Hope it is useful.
 
Br,
Dean
 

> Date: Sun, 13 Jul 2014 11:37:42 +0900
> To: address@hidden
> CC: address@hidden
> Subject: Re: [ft]: Microsoft YaHei UI font can't be displayed well
> From: address@hidden
>
>
> > My laptop DPI is 144, please refer to attachment DPI.png. There you
> > can see i set 8pt-12pt for `据��'. If converted to pixel unit, they
> > would be 12-24 px. I also attach an picture for "据" in fontlab
> > with 12 ppem and 14 ppem, you can see in 12ppem, the height is 11
> > px, in 14ppem, the height is 12 pixel. The height matched in Word.
> > So i think those pixel value should be correct.
>
> Yes, this looks good now, thanks![*] It would be very helpful if you
> could do another screenshot with FontLab, this time with ClearType
> hinting. What you have selected in `fontlab.png' is classical B/W
> rendering, and in this mode FreeType produces identical bitmaps for
> 12ppem and 14ppem.
>
>
> Werner
>
>
> [*] I find it very disturbing that character `��' is a pixel too large
> at 12ppem and 14ppem, even with the MS rasterizer. Originally I
> thought that FreeType did something wrong, but fortunately this is
> not the case. The same problem happens for many other glyphs in
> this font �C this is a clear sign that the people who extended the
> GB 2312 glyphs with the GB 18030 repertoire did a bad hinting or
> scaling job, which I consider rather embarrassing for MS.

cleartype_excel.png
Description: PNG image

cleartype_VTT.png
Description: PNG image