Tibetan Unicode Test Page

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The tests below require a Unicode-enabled computer. See Preparing Computers for Tibetan Editing for more information.

Web browser test

The following text is Tibetan Unicode - if your installation is supporting Unicode, the display should match the picture below:


The Unicode text above should resemble this image:


Note that you can copy to the first mantra as text into the clipboard. By pasting the text into a Unicode aware application you can modify the text. The second mantra is simply an image and cannot be modified.

Things that can go wrong are:

  • You don't have a Tibetan Unicode font installed - only garbage is displayed: Install a Unicode font, see Tibetan Fonts.
  • You see Tibetan letters, but the stacks do not display correctly and seem to be smashed - you need to install support for complex scripts as described in Preparing Computers for Tibetan Editing.
  • Make sure that you are using the latest Version of your Browser.

Harfbuzz test

Recent versions of the Harfbuzz library that is used on a large number of platforms for complex script rendering, introduced a bug that causes incorrect display of the Tibetan long vowel u: ཨཱུ་.

Glyph U hUM
Your browser renders: ཨཱུ ཧཱུཾ
Correct image: Glyph-u.png Glyph-hum.png

There are two ways, this bug manifests:

  • For some fonts, the order of the subscribed vowels is mixed up, this seems to happen with fonts Tibetan Machine Uni and Microsoft Himalaya (Windows platforms with applications that use Harfbuzz).
  • For most other fonts, the shaper simply does not stack the vowel-signs.

Affected platforms

Harfbuzz libraries are used by Firefox, Chrome (all platforms and OS), LibreOffice 5.3 (all OS), Android and Linux.

External links

Internal links