Dear Sir, Thank you for quick reply. For fist, I comment about the requirement of the vertical blue zone.
On Wed, 20 Apr 2011 20:34:52 +0800 Just Fill Bugs <mozbug...@yahoo.com.au> wrote: >On 04/20/2011 02:16 PM, mpsuz...@hiroshima-u.ac.jp wrote: >> Q1) The vertical bluezones are essential? >> >> In vertical CJK typography, there would be the requirement >> to align long center stems (of the glyphs like "十", "土", >> "王"), to pretend the centerlines of the glyphs are aligned. >> However, I'm questionable if there is a requirement to align >> non-center stems to be aligned. Maybe the alignment of the >> vertical stems of the radical-"enclosure" glyphs (like "回", >> "囚", "困") or radical-"gate" glyphs (like "門", "開", "閉" ) >> may improve the quality. But I'm questionable if there is >> the requirement to align the left vertical stems of radical >> "mound" glyphs (like "阿", "防", "阻"), or radical "mouse" >> glyphs (like "叫", "叩", "叱"). >> >> Maybe my impression about vertical bluezone is based on the >> typography in Japanese market, so, I don't think this is >> generic. Please let me know if there is such requirement in >> Chinese or Korean typography. > >There is require to align side of glyph in vertical writing in Chinese. > >For the vertical blue zone. Partly because I kinda misunderstood the >icfb tag describe by Adobe at > >http://partners.adobe.com/public/developer/opentype/index_tag4.html#ideoembox > >I guess it mostly talking about horizontal alignment using icfb, while I >mistook it's also used for vertical layout. Umm, I think, the requirement described in Adobe document is talking about the alignment of the rectangle to store the glyphs with reserved inter-glyph spaces (em-box, body size) and without reserved inter-glyph spaces (something like an integration of bounding box of the glyphs). It does not mean that there is a vertical alignment of the vertical stems. I will ask Adobe experts. >Another reason I consider to add vertical blue zone is that I don't know >how vertical layout looks like at small size on screen. Without blue >zone, the width of glyphs will vary quite frequently at small points. I >don't know how our eyes tolerant to that. Indeed. In my impression, the customers who request the vertical writing mode of digital text tend to prefer the paper-like appearance, so they are not interested in so much about the text with the small points at low resolution device. >Just better safe than sorry. Of course it can always be removed now and >add back by request. Although I'm going to disable the vertical alignment by default (to reduce the time of blue zone calculation), I appreciate that you included the code for vertical alignment. It would be really useful to draft the autofitter for the scripts using vertical alignment, like, Mongolian or Phaspa. Regards, mpsuzuki _______________________________________________ Freetype-devel mailing list Freetype-devel@nongnu.org http://lists.nongnu.org/mailman/listinfo/freetype-devel
