diff options
author | Akira Kakuto <kakuto@fuk.kindai.ac.jp> | 2016-07-07 09:56:43 +0000 |
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committer | Akira Kakuto <kakuto@fuk.kindai.ac.jp> | 2016-07-07 09:56:43 +0000 |
commit | 750d5e56c495ac771c2180183e9fccc00f0fe6bf (patch) | |
tree | e2b12ae3c07d546028e969437ab8ca0eb6047540 /Build/source/libs/freetype2/freetype-src/devel/ftoption.h | |
parent | 04ab6a8796404e13e659f596d4ae1d912a82ea0f (diff) |
freetype 2.6.4
git-svn-id: svn://tug.org/texlive/trunk@41649 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/libs/freetype2/freetype-src/devel/ftoption.h')
-rw-r--r-- | Build/source/libs/freetype2/freetype-src/devel/ftoption.h | 62 |
1 files changed, 50 insertions, 12 deletions
diff --git a/Build/source/libs/freetype2/freetype-src/devel/ftoption.h b/Build/source/libs/freetype2/freetype-src/devel/ftoption.h index b354efdcdb0..d20df81ed8b 100644 --- a/Build/source/libs/freetype2/freetype-src/devel/ftoption.h +++ b/Build/source/libs/freetype2/freetype-src/devel/ftoption.h @@ -586,23 +586,53 @@ FT_BEGIN_HEADER /*************************************************************************/ /* */ /* Define TT_CONFIG_OPTION_SUBPIXEL_HINTING if you want to compile */ - /* EXPERIMENTAL subpixel hinting support into the TrueType driver. This */ - /* replaces the native TrueType hinting mechanism when anything but */ - /* FT_RENDER_MODE_MONO is requested. */ + /* subpixel hinting support into the TrueType driver. This modifies the */ + /* TrueType hinting mechanism when anything but FT_RENDER_MODE_MONO is */ + /* requested. */ /* */ - /* Enabling this causes the TrueType driver to ignore instructions under */ - /* certain conditions. This is done in accordance with the guide here, */ - /* with some minor differences: */ + /* In particular, it modifies the bytecode interpreter to interpret (or */ + /* not) instructions in a certain way so that all TrueType fonts look */ + /* like they do in a Windows ClearType (DirectWrite) environment. See */ + /* [1] for a technical overview on what this means. See `ttinterp.h' */ + /* for more details on the LEAN option. */ /* */ - /* http://www.microsoft.com/typography/cleartype/truetypecleartype.aspx */ + /* There are three options. */ /* */ - /* By undefining this, you only compile the code necessary to hint */ - /* TrueType glyphs with native TT hinting. */ + /* 1. This option is associated with the `Infinality' moniker. */ + /* Contributed by an individual nicknamed Infinality with the goal of */ + /* making TrueType fonts render better than on Windows. A high */ + /* amount of configurability and flexibility, down to rules for */ + /* single glyphs in fonts, but also very slow. Its experimental and */ + /* slow nature and the original developer losing interest meant that */ + /* this option was never enabled in default builds. */ /* */ - /* This option requires TT_CONFIG_OPTION_BYTECODE_INTERPRETER to be */ - /* defined. */ + /* 2. The new default mode for the TrueType driver. The Infinality code */ + /* base was stripped to the bare minimum and all configurability */ + /* removed in the name of speed and simplicity. The configurability */ + /* was mainly aimed at legacy fonts like Arial, Times New Roman, or */ + /* Courier. Legacy fonts are fonts that modify vertical stems to */ + /* achieve clean black-and-white bitmaps. The new mode focuses on */ + /* applying a minimal set of rules to all fonts indiscriminately so */ + /* that modern and web fonts render well while legacy fonts render */ + /* okay. */ /* */ -#define TT_CONFIG_OPTION_SUBPIXEL_HINTING + /* 3. Compile both. */ + /* */ + /* By undefining these, you get rendering behavior like on Windows */ + /* without ClearType, i.e., Windows XP without ClearType enabled and */ + /* Win9x (interpreter version v35). Or not, depending on how much */ + /* hinting blood and testing tears the font designer put into a given */ + /* font. If you define one or both subpixel hinting options, you can */ + /* switch between between v35 and the ones you define. */ + /* */ + /* This option requires TT_CONFIG_OPTION_BYTECODE_INTERPRETER to be */ + /* defined. */ + /* */ + /* [1] http://www.microsoft.com/typography/cleartype/truetypecleartype.aspx */ + /* */ +/* #define TT_CONFIG_OPTION_SUBPIXEL_HINTING 1 */ +/* #define TT_CONFIG_OPTION_SUBPIXEL_HINTING 2 */ +#define TT_CONFIG_OPTION_SUBPIXEL_HINTING ( 1 | 2 ) /*************************************************************************/ @@ -811,6 +841,14 @@ FT_BEGIN_HEADER */ #ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER #define TT_USE_BYTECODE_INTERPRETER + +#if TT_CONFIG_OPTION_SUBPIXEL_HINTING & 1 +#define TT_SUPPORT_SUBPIXEL_HINTING_INFINALITY +#endif + +#if TT_CONFIG_OPTION_SUBPIXEL_HINTING & 2 +#define TT_SUPPORT_SUBPIXEL_HINTING_MINIMAL +#endif #endif |