freetype-2.8 freetype-doc

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New minor version.

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CHANGES BETWEEN 2.7.1 and 2.8

1. IMPORTANT CHANGES

• Support for OpenType Variation Fonts is now complete. The last missing part was handling the VVAR' and MVAR' tables, which is available with this release.

• A new function `FT_Face_Properties' allows the control of some module and library properties per font. Currently, the following properties can be handled: stem darkening, LCD filter weights, and the random seed for the `random' CFF operator.

• The PCF change to show more `colourful' family names (introduced in version 2.7.1) was too radical; it can now be configured with PCF_CONFIG_OPTION_LONG_FAMILY_NAMES at compile time. If activated, it can be switched off at run time with the new pcf property no-long-family-names'. If the FREETYPE_PROPERTIES' environment variable is available, you can say

FREETYPE_PROPERTIES=pcf:no-long-family-names=1

• Support for the following scripts has been added to the auto-hinter.

Adlam, Avestan, Bamum, Buhid, Carian, Chakma, Coptic, Cypriot, Deseret, Glagolitic, Gothic, Kayah, Lisu, N'Ko, Ol Chiki, Old Turkic, Osage, Osmanya, Saurashtra, Shavian, Sundanese, Tai Viet, Tifinagh, Unified Canadian Syllabics, Vai

1. IMPORTANT BUG FIXES

• `Light' auto-hinting mode no longer uses TrueType metrics for TrueType fonts. This bug was introduced in version 2.4.6, causing horizontal scaling also. Almost all GNU/Linux distributions (with Fedora as a notable exception) disabled the corresponding patch for good reasons; chances are thus high that you won't notice a difference.

• If optical backward compatibility for legacy applications is necessary, you might enable the AF_CONFIG_OPTION_TT_SIZE_METRICS configuration option. However, it is strongly recommended to avoid that, adjusting font sizes instead.

• If a TrueType font gets loaded with FT_LOAD_NO_HINTING, FreeType now scales the font linearly again (bug introduced in version 2.4.6).

• CVE-2017-8105, CVE-2017-8287: Older FreeType versions have out-of-bounds writes caused by heap-based buffer overflows related to Type 1 fonts.

​https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-8105 ​https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-8287

1. MISCELLANEOUS

• A new function `FT_Set_Default_Properties' has been added to parse the `FREETYPE_PROPERTIES' environment variable (previously, it was internal only). `FT_Init_FreeType' always call this function, but `FT_New_Library' does not (similar to `FT_Add_Default_Modules').

• To be in sync with OpenType version 1.7 and newer, macros

FT_PARAM_TAG_IGNORE_PREFERRED_FAMILY, FT_PARAM_TAG_IGNORE_PREFERRED_SUBFAMILY, TT_NAME_ID_PREFERRED_FAMILY TT_NAME_ID_PREFERRED_SUBFAMILY

are renamed to

FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_FAMILY, FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_SUBFAMILY, TT_NAME_ID_TYPOGRAPHIC_FAMILY TT_NAME_ID_TYPOGRAPHIC_SUBFAMILY

The old macro names are deprecated (but still available).

• Support for SFNT `name' tables has been improved.

. Format 1 name' tables are now supported. Use new function FT_Get_Sfnt_LangTag' to access associated language tags.

. Language, encoding, and name IDs have been updated to OpenType version 1.8.1.

• The new CFF engine now handles the `random' operator. All CFF opcodes are now supported.

• The CFF module has a new property `random-seed' to control the pseudo-random number generation for the `random' operator.

• The freetype-config' script is now a wrapper of pkg-config' if this program is available in the path.

• FT_LOAD_TARGET_LCD is now a variant of FT_LOAD_TARGET_LIGHT; this should provide better rendering results.

• A mode to display light auto-hinting with sub-pixel positioning has been added to `ftdiff'.

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Fixed at revision 18731.

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Milestone renamed

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Milestone renamed