CHANGES BETWEEN 2.6.1 and 2.6.2
I. IMPORTANT CHANGES
- The auto-hinter now supports stem darkening, to be controlled by
the new `no-stem-darkening' and `darkening-parameters'
properties. This is an experimental feature contributed by
Nikolaus Waxweiler, and the interface might change in a future
release.
- By default, stem darkening is now switched off (for both the CFF
engine and the auto-hinter). The main reason is that you need
linear alpha blending and gamma correction to get correct
rendering results, and the latter is not yet available in most
freely available rendering stacks like X11. Applying stem
darkening without proper gamma correction leads to far too dark
rendering results.
- The meaning of `FT_RENDER_MODE_LIGHT' has been slightly
modified. It now essentially means `no hinting along the
horizontal axis'; in particular, no change of glyph advance
widths. Consequently, the auto-hinter is used for all scalable
font formats except for CFF. It is planned that other
font-specific rendering engines (TrueType, Type 1) will follow.
II. MISCELLANEOUS
- The default LCD filter has been changed to be normalized and
color-balanced.
- For better compatibility with FontConfig, function
`FT_Library_SetLcdFilter' accepts a new enumeration value
`FT_LCD_FILTER_LEGACY1' (which has the same meaning as
`FT_LCD_FILTER_LEGACY').
- A large number of bugs have been detected by using the libFuzzer
framework, which should further improve handling of invalid
fonts. Thanks again to Kostya Serebryany and Bungeman!
- `TT_CONFIG_OPTION_MAX_RUNNABLE_OPCODES', a new configuration
option, controls the maximum number of executed opcodes within a
bytecode program. You don't want to change this except for very
special situations (e.g., making a library fuzzer spend less
time to handle broken fonts).
- The smooth renderer has been made faster.
- The `ftstring' demo program now supports sub-pixel rendering;
use key `l' to cycle through the LCD modes.
- The `ftstring' demo program now supports colour rendering; use
the `space' key to cycle through various colour combinations.
- The graphical demo programs now use a default gamma value of 1.8
(instead of 1.2).
