font/sfnt: support cmap format 6

The library provides support for CMap formats 2, 4 and 12, but
does not support CMap format 6.

CL adds support for CMap format 6 (trimmed table mapping).

Change-Id: I40657c4805c14017367af17596023da96b2c7483
Reviewed-on: https://go-review.googlesource.com/c/146079
Reviewed-by: Nigel Tao <nigeltao@golang.org>
Run-TryBot: Nigel Tao <nigeltao@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
1 file changed
tree: 61113b567b48745567ad3d9641ea1d0b3caafc5a
  1. .gitattributes
  2. .gitignore
  3. AUTHORS
  4. CONTRIBUTING.md
  5. CONTRIBUTORS
  6. LICENSE
  7. PATENTS
  8. README.md
  9. bmp/
  10. cmd/
  11. codereview.cfg
  12. colornames/
  13. draw/
  14. example/
  15. font/
  16. math/
  17. riff/
  18. testdata/
  19. tiff/
  20. vector/
  21. vp8/
  22. vp8l/
  23. webp/
README.md

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