Bug 107496

It's merged from:
https://bugs.freedesktop.org/show_bug.cgi?id=105147
and
https://bugs.freedesktop.org/show_bug.cgi?id=107327
bugs for Old-Hungarian script.
See documents:
http://www.unicode.org/wg2/docs/n4268.pdf
and
https://unicode.org/charts/PDF/U10C80.pdf

Created attachment 140981 [details] [review]
Old Hungarian letters and its req. patch

Final for DejavuSans Old Hungarian parts, final req for all Dejavu fonts.

@Denis:
I hope, its useable. Please merge it.

@Denis: Pull request is: https://github.com/dejavu-fonts/dejavu-fonts/pull/27
Thanks:
Viktor

@Denis: Pull request #27 removed, because had mistakes.
I won't to upload anything to github, while you check the patch.
After that I ask you or Adolfo, help me how to upload it.

@Adolfo: When Denis checked the patch, I would like ask You or Denis, help me how to upload patch to github.

I will upload a testpage, as soon as possible. Now I on a holiday for a week.

@Stuart: Please switch the status to "Confirmed", wheter you think, its required.

@Denis, my question is: just only the patch file required to upload to github or all changed source files?

Created attachment 141098 [details]
Full test for patch

This is the full patch test page in pdf format.

@Adolfo: Is it enough to upload the patch to github, or full source files is required?

@Denis: Please adopt this patch for Dejavu-fonts!

Created attachment 142117 [details] [review]
Old Hungarian  and its req patch with better readability

This changed patch is developed in better readibility.
Old Hungarian part developed for Sans, Sans Bold, Sans Bold Oblique and Sans Oblique. The all Sans and Serif subfonts implements its missing requirements, as reversed comma and reversed double 99 low quote mark.

This patch hardly recomended for bug 
https://bugs.documentfoundation.org/show_bug.cgi?id=103405

Other fixed required bugs for previous bug 
are:
https://bugs.documentfoundation.org/show_bug.cgi?id=107204
https://bugs.documentfoundation.org/show_bug.cgi?id=116157
https://bugs.documentfoundation.org/show_bug.cgi?id=116322
https://bugs.documentfoundation.org/show_bug.cgi?id=97406
https://bugs.documentfoundation.org/show_bug.cgi?id=95162
https://bugs.freedesktop.org/show_bug.cgi?id=102425

Created attachment 142118 [details]
Test the OldHungarian_2.patch

cc: Stuart, is there any font acceptation method for UNICODE standard?

(In reply to Kovács Viktor from comment #15)
> cc: Stuart, is there any font acceptation method for UNICODE standard?

No, they are font foundry neutral. You are free to assign any glyph(s) desired to the established Unicode point/name values U+10C80..U+10CFF. Obviously if you assign the wrong glyph to a point the users will not appreciate it, just keep to the Unicode specification. Styling the glyphs are up to the font designer(s) and whatever internal approval to publish.

For missing codepoints you'd have to use a PUA assignment in the target font to start with--and users, applications would have to pick it up there.

And when additional glyphs are accepted by users, then petition Unicode to add glyphs to the U+10C80..U+10CFF reserved range, U+10cB3-BF and U+10CF3-F9. Or possibly assign an additional block.

I don't want extend or override the standard. I would like if someone tell that the font not override or extend the standard.

Created attachment 142121 [details]
This document is the Old Hungarian ext. in tables

cc:Denis, You have the law, You are my judge.

Is it acceptable as Old Hungarian extension for DejaVu Sans fonts?

The original standard is:
https://unicode.org/charts/PDF/U10C80.pdf

cc:Denis, tell me, the patch is acceptable for DejaVu sans font?

cc:Denis, will you fix this bug in the near future?

(In reply to Kovács Viktor from comment #17)
> I don't want extend or override the standard. I would like if someone tell
> that the font not override or extend the standard.

If we can not override the Unicode standard the Deja Vu font will not be fully compatible for the users. Using PUE area can be a temp solution.

(In reply to V Stuart Foote from comment #16)
> (In reply to Kovács Viktor from comment #15)
> > cc: Stuart, is there any font acceptation method for UNICODE standard?
> 
> No, they are font foundry neutral. You are free to assign any glyph(s)
> desired to the established Unicode point/name values U+10C80..U+10CFF.
> Obviously if you assign the wrong glyph to a point the users will not
> appreciate it, just keep to the Unicode specification.

There are empty slot in the so called Old Hungarian area. We ccould use them instead of PUA area. The reason is that the Unicode standard does not meet with the reality, we definitely need these additional empty code points.
On the other hand there are strongly different glyph variants (for example UEE), because of historical reasons. 

 Styling the glyphs
> are up to the font designer(s) and whatever internal approval to publish.

We have developed rovas fonts, used in 90% of rovas books published in Hungary. We are ready to give it freely for the Dejavu font family and its users. This character set is widely known amongst rovas book readers.
> 
> For missing codepoints you'd have to use a PUA assignment in the target font

According to our experience, the PUA assignment is not eligible, using this area shows the lacking characters from the Unicode standards. 

> to start with--and users, applications would have to pick it up there.
> 
> And when additional glyphs are accepted by users, then petition Unicode to
> add glyphs to the U+10C80..U+10CFF reserved range, U+10cB3-BF and
> U+10CF3-F9. Or possibly assign an additional block.

We have had many proposal in the last ten years, but there are still missing code points.

How could I buy these books? ;) I have just only one. :(
If you make a better patch, I step to back.

(In reply to Tamas Rumi from comment #22)
> We have had many proposal in the last ten years, but there are still missing
> code points.
Tamás, I don't understand, why would be better, if Old Hungarian UNICODE block would have 128 characters instead of "only" 108? If You with the other "Rovás" communities would agree, it would be possible.

> Tamás, I don't understand, why would be better, if Old Hungarian UNICODE
> block would have 128 characters instead of "only" 108? If You with the other
> "Rovás" communities would agree, it would be possible.

You know it very well (see contributions made to Unicode), the current standard simply does not contains all letters of contemporary Hungarian alphabet. 
We are ready to provide these missing characters to Deja Vu font set.

Created attachment 143496 [details]
Testcase Sans form

This is the test case of DejaVu Sans basics. (regular,oblique, bold, bold-oblique)
Github doesn't require direct patch file, just only diff.
The Serif version is duplicated from Sans version. 
True Serif version is impossible for this part of Unicode range. (See, for example Old Hungarian letter l)