Edit File: ftparams.h
/***************************************************************************/ /* */ /* ftparams.h */ /* */ /* FreeType API for possible FT_Parameter tags (specification only). */ /* */ /* Copyright 2017-2018 by */ /* David Turner, Robert Wilhelm, and Werner Lemberg. */ /* */ /* This file is part of the FreeType project, and may only be used, */ /* modified, and distributed under the terms of the FreeType project */ /* license, LICENSE.TXT. By continuing to use, modify, or distribute */ /* this file you indicate that you have read the license and */ /* understand and accept it fully. */ /* */ /***************************************************************************/ #ifndef FTPARAMS_H_ #define FTPARAMS_H_ #include <ft2build.h> #include FT_FREETYPE_H #ifdef FREETYPE_H #error "freetype.h of FreeType 1 has been loaded!" #error "Please fix the directory search order for header files" #error "so that freetype.h of FreeType 2 is found first." #endif FT_BEGIN_HEADER /************************************************************************** * * @section: * parameter_tags * * @title: * Parameter Tags * * @abstract: * Macros for driver property and font loading parameter tags. * * @description: * This section contains macros for the @FT_Parameter structure that are * used with various functions to activate some special functionality or * different behaviour of various components of FreeType. * */ /*************************************************************************** * * @constant: * FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_FAMILY * * @description: * A tag for @FT_Parameter to make @FT_Open_Face ignore typographic * family names in the `name' table (introduced in OpenType version * 1.4). Use this for backward compatibility with legacy systems that * have a four-faces-per-family restriction. * * @since: * 2.8 * */ #define FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_FAMILY \ FT_MAKE_TAG( 'i', 'g', 'p', 'f' ) /* this constant is deprecated */ #define FT_PARAM_TAG_IGNORE_PREFERRED_FAMILY \ FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_FAMILY /*************************************************************************** * * @constant: * FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_SUBFAMILY * * @description: * A tag for @FT_Parameter to make @FT_Open_Face ignore typographic * subfamily names in the `name' table (introduced in OpenType version * 1.4). Use this for backward compatibility with legacy systems that * have a four-faces-per-family restriction. * * @since: * 2.8 * */ #define FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_SUBFAMILY \ FT_MAKE_TAG( 'i', 'g', 'p', 's' ) /* this constant is deprecated */ #define FT_PARAM_TAG_IGNORE_PREFERRED_SUBFAMILY \ FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_SUBFAMILY /*************************************************************************** * * @constant: * FT_PARAM_TAG_INCREMENTAL * * @description: * An @FT_Parameter tag to be used with @FT_Open_Face to indicate * incremental glyph loading. * */ #define FT_PARAM_TAG_INCREMENTAL \ FT_MAKE_TAG( 'i', 'n', 'c', 'r' ) /************************************************************************** * * @constant: * FT_PARAM_TAG_LCD_FILTER_WEIGHTS * * @description: * An @FT_Parameter tag to be used with @FT_Face_Properties. The * corresponding argument specifies the five LCD filter weights for a * given face (if using @FT_LOAD_TARGET_LCD, for example), overriding * the global default values or the values set up with * @FT_Library_SetLcdFilterWeights. * * @since: * 2.8 * */ #define FT_PARAM_TAG_LCD_FILTER_WEIGHTS \ FT_MAKE_TAG( 'l', 'c', 'd', 'f' ) /************************************************************************** * * @constant: * FT_PARAM_TAG_RANDOM_SEED * * @description: * An @FT_Parameter tag to be used with @FT_Face_Properties. The * corresponding 32bit signed integer argument overrides the font * driver's random seed value with a face-specific one; see * @random-seed. * * @since: * 2.8 * */ #define FT_PARAM_TAG_RANDOM_SEED \ FT_MAKE_TAG( 's', 'e', 'e', 'd' ) /************************************************************************** * * @constant: * FT_PARAM_TAG_STEM_DARKENING * * @description: * An @FT_Parameter tag to be used with @FT_Face_Properties. The * corresponding Boolean argument specifies whether to apply stem * darkening, overriding the global default values or the values set up * with @FT_Property_Set (see @no-stem-darkening). * * This is a passive setting that only takes effect if the font driver * or autohinter honors it, which the CFF, Type~1, and CID drivers * always do, but the autohinter only in `light' hinting mode (as of * version 2.9). * * @since: * 2.8 * */ #define FT_PARAM_TAG_STEM_DARKENING \ FT_MAKE_TAG( 'd', 'a', 'r', 'k' ) /*************************************************************************** * * @constant: * FT_PARAM_TAG_UNPATENTED_HINTING * * @description: * Deprecated, no effect. * * Previously: A constant used as the tag of an @FT_Parameter structure to * indicate that unpatented methods only should be used by the TrueType * bytecode interpreter for a typeface opened by @FT_Open_Face. * */ #define FT_PARAM_TAG_UNPATENTED_HINTING \ FT_MAKE_TAG( 'u', 'n', 'p', 'a' ) /* */ FT_END_HEADER #endif /* FTPARAMS_H_ */ /* END */
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