directwrite: multiple improvements to font scanning

There were various issues with font scanning. This addresses the following:

- Synthesized font faces (bold/oblique) were added to the list. Just skip
  those, this is handled internally by libass.
- Use the win32 font family names, if available. Traditionally, Windows
  groups font families in a different way, so that the number of
  variants is small (<= 4). With this, Arial Narrow and Arial Black
  appear as a separate family, which is what we want.
- Full names are not mandatory. Correctly handle the case that there
  are no full names.
- Don't use the bogus LOCALE_NAME_MAX_LENGTH constant to determine the
  size of the name buffer. Names can be almost arbitrarily long.
  Handle names up to 256 characters correctly and truncate longer names.

0 files changed, 0 insertions, 0 deletions