Hinting issues at 15px – ascenders serifs

[GoogleCodeExporter]

> What steps will reproduce the problem?
1. Download Heuristica TTF
2. Go to Impallari Drag and Drop font testing page:
http://www.impallari.com/testing/
3. Drop Heuristica-Regular.ttf on the page

> What is the expected output? What do you see instead?

Expected output: properly hinted fonts.
Actual output: serifs on ascenders are slanted (which I infer at hinting issue).

Please see: http://adrientetar.legtux.org/cached/rust-docs/std.htm
(screenshot attached)

We did hit that issue on the Rust Programming Language:
https://github.com/mozilla/rust/issues/13780#issuecomment-41488650

Relevant info and screenshot are available there.

> What version of the product are you using? On what operating system?

Version 1.0.1.
Reproduced on Windows 8 x64 with Firefox 28 (DirectWrite) and Chrome 34 (GDI).

> Please provide any additional information below.

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Original issue reported on code.google.com by adri.du...@gmail.com on 27 Apr 2014 at 7:32

Attachments:

• err.PNG

[GoogleCodeExporter]

I only mentioned it in the title but the issue occurs at 12px and 15px sizes, 
on Windows (I have not tested any other platform as of now).

Original comment by adri.du...@gmail.com on 27 Apr 2014 at 7:36

[GoogleCodeExporter]

The truetype instructions are generated automatically. Do not expect too much 
from them. Try the CFF opentype fonts (*.otf) instead.

Original comment by andrej.panov on 28 Apr 2014 at 1:50

[GoogleCodeExporter]

The TTFs generally look better at small sizes on Windows (trying on Windows 7 
right now) through... too bad about this small issue.
Have you looked into ttfautohint?

Original comment by adri.du...@gmail.com on 28 Apr 2014 at 5:07

[GoogleCodeExporter]

I tried ttfautohint with default parameters; it does not match the stock TTFs.

Original comment by adri.du...@gmail.com on 28 Apr 2014 at 5:18