Add South Asia fonts #414
Add South Asia fonts #414
Conversation
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Bengali uses Mukti, which currently is having some strange issues in mapnik/mapnik#2183. I selected this font because it has a bold version, and stylistically is similar to DejaVu |
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Available fonts for Devanagari:
As before, the letters to the right are in DejaVu for reference, and the first two are proprietary fonts for reference. I'm leaning towards Chandas for being similar in style to DejaVu. |
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My choice is Gargi for better small size legibility and proportions compared to Chandas. ( I can read/write devanagari) |
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It seems that the rendering is not the same for these fonts. As per my guess for the text, that ends with "gita", only Mangal, Gargi, Samyak got the rendering right. Among them, for smaller fonts, I prefer Gargi as it is crisp and readable. |
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Something I've been wondering about is that there are apparently two styles, the Southern or Bombay style and Northern or Calcutta style. Do we need both supported? If so, which do we use when? |
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I'm having a real hard time finding something that's rendered on the map. Could someone provide a link to an area where the names are in devanagari? I was looking at the Ganges, but #415 is an issue with the new fonts, not just unifont. |
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Many small towns in Nepal are supposed to be rendered with Devnagri. |
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I've put up a demo at http://tile.paulnorman.ca/demo/fonts.html#11/26.7177/87.4076 (Gargi and Chandas layers) Of course, it doesn't render anything on roads with the Mapnik bug. |
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Would this be syntactically correct? It would reduce duplicate code. @bold-fonts: "DejaVu Sans Bold", "Arundina Sans Bold", "Padauk Bold", "Mukti Narrow Bold", @book-fonts; |
It didn't work for me. 4a33288 |
It fits sylistically with DejaVu and has both a normal and bold version
Unifont's name changed from "unifont" to "Unifont" at some point, probably with 6.0. This commit causes the more recent caps to be preferred, but will support either version. Closes gravitystorm#429
Unfortunately it doesn't work. See mapbox/carto#333 for the upstream feature request. |
Gargi was considered the clearest of the available fonts
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I had trouble finding some Tamil, but eventually found மட்டுவில் I looked at the fonts. Some put Tamil glyphs in place of latin characters, which ruled them out. TSCu_Comic, TSCu_Paranar and TSCu_Times were the three options. The first is Tamil Comic Sans, the last is Tamil times, and Paranar fits in best, as well as having Bold and Oblique versions. Unifont TSCu_Paranar |
There aren't really any other matching options for Tamil fonts
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The only packaged Tibetan font is Tibetan Machine Uni. It's also apparently got some of the best support. རྩེ་ཐང་ Tibetan Machine Uni Given the complex nature of Tibetan, I wouldn't be surprised if there are bugs that are only fixed in harfbuzz. |
There aren't really any other Tibetan options for fonts
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Message sent to talk@ asking for help with Sinhala, Gujarati, Gurmukhi, Kannada, and Oriya. |
Mallige has bold and italic versions. Kedage is another option for a Kannada font, but it seems to be impacted by mapnik/mapnik#2195
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This might be related to https://trac.openstreetmap.org/ticket/4957. |
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Another font related issue: https://trac.openstreetmap.org/ticket/2946 |
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I can confirm the Tamil rendering is incorrect in both the samples. On Mon, Mar 31, 2014 at 7:17 PM, math1985 notifications@github.com wrote:
Arun Ganesh |
Not within the scope of this, as it's not in south asia |
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True, and I couldn't be bothered to look up if South-Asia has any RTL languages :) |
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I noticed the font stacks are growing to 12+ fonts each. Have you done performance testing for this in areas where it's common for labels to have characters not in the first 2-3 fonts? Working on Mapbox Streets we noticed something like a 30-40% rendering slowdown by adding just a few additional fonts to a stack. I don't have any relevant benchmark numbers, and anyway the impact is highly variable for different fonts. Just something that you might want to check on. |
I haven't. I'm not sure it's a huge issue, given that the vast majority of labels rendered will be done with DejaVu. I'll give it some thought, although I'm not sure my current benchmark set is well-suited to what are largely Asia-specific issues, and where my work has not yet covered CJK fonts. It might paint a better picture than reality by using a Europe-centric rendering test set, and worse than reality by having CJK glyphs fall all the way back to the end when that's not the final goal. Have you tried a virtual font set with fontconfig for Mapbox Streets? This is the standard way of covering the Unicode glyph space. |
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Ready to go from my perspective. |
Follow up to #358
See the Unicode Font Guide for what I am considering South Asia.
Gurmukhi (India, Pakistan)(Could only find LINESTRINGs, which aren't rendering due to bugs)Oriya (India)(Not found in DB)Sinhala (Sri Lanka)(Too many uses of it for Slovene right now to track down names)Urdu (Pakistan)(Covered by DejaVu)There are additional scripts in the region, but I believe them not likely present in name tags. If I'm missing one, I'd like to know.