/***************************************************************************/
/* */
/*freetype.h */
/* */
/*FreeType high-level API and common types (specification only). */
/* */
/*Copyright 1996-2015 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 __FREETYPE_H__
#define __FREETYPE_H__
#ifndef FT_FREETYPE_H
#error “`ft2build.h’ hasn’t been included yet!”
#error “Please always use macros to include FreeType header files.”
#error “Example:”
#error ”#include
#error ”#include FT_FREETYPE_H”
#endif
#include
#include FT_CONFIG_CONFIG_H
#include FT_TYPES_H
#include FT_ERRORS_H
FT_BEGIN_HEADER
/*************************************************************************/
/* */
/*
/*header_inclusion */
/* */
/*
/*************************************************************************/
/* */
/*
/*user_allocation*/
/* */
/*
/*************************************************************************/
/*************************************************************************/
/* */
/*B A S I C T Y P E S*/
/* */
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/* */
/*
/*base_interface */
/* */
/*
/*************************************************************************/
/* */
/*
/*FT_Glyph_Metrics */
/* */
/*
/*A structure used to model the metrics of a single glyph.The*/
/*values are expressed in 26.6 fractional pixel format; if the flag*/
/*@FT_LOAD_NO_SCALE has been used while loading the glyph, values*/
/*are expressed in font units instead. */
/* */
/*
/*width :: */
/*The glyph’s width. */
/* */
/*height ::*/
/*The glyph’s height.*/
/* */
/*horiBearingX ::*/
/*Left side bearing for horizontal layout. */
/* */
/*horiBearingY ::*/
/*Top side bearing for horizontal layout.*/
/* */
/*horiAdvance :: */
/*Advance width for horizontal layout. */
/* */
/*vertBearingX ::*/
/*Left side bearing for vertical layout. */
/* */
/*vertBearingY ::*/
/*Top side bearing for vertical layout.Larger positive values*/
/*mean further below the vertical glyph origin.*/
/* */
/*vertAdvance :: */
/*Advance height for vertical layout.Positive values mean the*/
/*glyph has a positive advance downward. */
/* */
/*
/*If not disabled with @FT_LOAD_NO_HINTING, the values represent */
/*dimensions of the hinted glyph (in case hinting is applicable).*/
/* */
/*Stroking a glyph with an outside border does not increase*/
/*`horiAdvance’ or `vertAdvance’; you have to manually adjust these*/
/*values to account for the added width and height.*/
/* */
typedef structFT_Glyph_Metrics_
{
FT_Poswidth;
FT_Posheight;
FT_PoshoriBearingX;
FT_PoshoriBearingY;
FT_PoshoriAdvance;
FT_PosvertBearingX;
FT_PosvertBearingY;
FT_PosvertAdvance;
} FT_Glyph_Metrics;
/*************************************************************************/
/* */
/*
/*FT_Bitmap_Size */
/* */
/*
/*This structure models the metrics of a bitmap strike (i.e., a set*/
/*of glyphs for a given point size and resolution) in a bitmap font. */
/*It is used for the `available_sizes’ field of @FT_Face.*/
/* */
/*
/*height :: The vertical distance, in pixels, between two*/
/*consecutive baselines.It is always positive. */
/* */
/*width:: The average width, in pixels, of all glyphs in the */
/*strike.*/
/* */
/*size :: The nominal size of the strike in 26.6 fractional*/
/*points.This field is not very useful.*/
/* */
/*x_ppem :: The horizontal ppem (nominal width) in 26.6 fractional */
/*pixels.*/
/* */
/*y_ppem :: The vertical ppem (nominal height) in 26.6 fractional*/
/*pixels.*/
/* */
/*
/*Windows FNT: */
/*The nominal size given in a FNT font is not reliable.Thus when */
/*the driver finds it incorrect, it sets `size’ to some calculated */
/*values and sets `x_ppem’ and `y_ppem’ to the pixel width and */
/*height given in the font, respectively.*/
/* */
/*TrueType embedded bitmaps: */
/*`size’, `width’, and `height’ values are not contained in the*/
/*bitmap strike itself.They are computed from the global font*/
/*parameters.*/
/* */
typedef structFT_Bitmap_Size_
{
FT_Shortheight;
FT_Shortwidth;
FT_Possize;
FT_Posx_ppem;
FT_Posy_ppem;
} FT_Bitmap_Size;
/*************************************************************************/
/*************************************************************************/
/* */
/* O B J E C T C L A S S E S */
/* */
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/* */
/*
/*FT_Library */
/* */
/*
/*A handle to a FreeType library instance.Each `library’ is*/
/*completely independent from the others; it is the `root’ of a set*/
/*of objects like fonts, faces, sizes, etc.*/
/* */
/*It also embeds a memory manager (see @FT_Memory), as well as a */
/*scan-line converter object (see @FT_Raster). */
/* */
/*In multi-threaded applications it is easiest to use one*/
/*`FT_Library’ object per thread.In case this is too cumbersome, */
/*a single `FT_Library’ object across threads is possible also */
/*(since FreeType version 2.5.6), as long as a mutex lock is used*/
/*around @FT_New_Face and @FT_Done_Face. */
/* */
/*
/*Library objects are normally created by @FT_Init_FreeType, and */
/*destroyed with @FT_Done_FreeType.If you need reference-counting*/
/*(cf. @FT_Reference_Library), use @FT_New_Library and */
/*@FT_Done_Library.*/
/* */
typedef struct FT_LibraryRec_*FT_Library;
/*************************************************************************/
/* */
/*
/*module_management*/
/* */
/*************************************************************************/
/*************************************************************************/
/* */
/*
/*FT_Module*/
/* */
/*
/*A handle to a given FreeType module object.Each module can be a*/
/*font driver, a renderer, or anything else that provides services */
/*to the formers.*/
/* */
typedef struct FT_ModuleRec_*FT_Module;
/*************************************************************************/
/* */
/*
/*FT_Driver*/
/* */
/*
/*A handle to a given FreeType font driver object.Each font driver */
/*is a special module capable of creating faces from font files. */
/* */
typedef struct FT_DriverRec_*FT_Driver;
/*************************************************************************/
/* */
/*
/*FT_Renderer*/
/* */
/*
/*A handle to a given FreeType renderer.A renderer is a special*/
/*module in charge of converting a glyph image to a bitmap, when */
/*necessary.Each renderer supports a given glyph image format, and */
/*one or more target surface depths. */
/* */
typedef struct FT_RendererRec_*FT_Renderer;
/*************************************************************************/
/* */
/*
/*base_interface */
/* */
/*************************************************************************/
/*************************************************************************/
/* */
/*
/*FT_Face*/
/* */
/*
/*A handle to a given typographic face object.A face object models */
/*a given typeface, in a given style.*/
/* */
/*
/*Each face object also owns a single @FT_GlyphSlot object, as well*/
/*as one or more @FT_Size objects. */
/* */
/*Use @FT_New_Face or @FT_Open_Face to create a new face object from */
/*a given filepathname or a custom input stream. */
/* */
/*Use @FT_Done_Face to destroy it (along with its slot and sizes). */
/* */
/*An `FT_Face’ object can only be safely used from one thread at a */
/*time.Similarly, creation and destruction of `FT_Face’ with the */
/*same @FT_Library object can only be done from one thread at a*/
/*time.On the other hand, functions like @FT_Load_Glyph and its*/
/*siblings are thread-safe and do not need the lock to be held as*/
/*long as the same `FT_Face’ object is not used from multiple*/
/*threads at the same time.*/
/* */
/*
/*See @FT_FaceRec for the publicly accessible fields of a given face */
/*object.*/
/* */
typedef struct FT_FaceRec_*FT_Face;
/*************************************************************************/
/* */
/*
/*FT_Size*/
/* */
/*
/*A handle to an object used to model a face scaled to a given */
/*character size.*/
/* */
/*
/*Each @FT_Face has an _active_ @FT_Size object that is used by*/
/*functions like @FT_Load_Glyph to determine the scaling */
/*transformation that in turn is used to load and hint glyphs and*/
/*metrics. */
/* */
/*You can use @FT_Set_Char_Size, @FT_Set_Pixel_Sizes,*/
/*@FT_Request_Size or even @FT_Select_Size to change the content */
/*(i.e., the scaling values) of the active @FT_Size. */
/* */
/*You can use @FT_New_Size to create additional size objects for a */
/*given @FT_Face, but they won’t be used by other functions until*/
/*you activate it through @FT_Activate_Size.Only one size can be */
/*activated at any given time per face.*/
/* */
/*
/*See @FT_SizeRec for the publicly accessible fields of a given size */
/*object.*/
/* */
typedef struct FT_SizeRec_*FT_Size;
/*************************************************************************/
/* */
/*
/*FT_GlyphSlot */
/* */
/*
/*A handle to a given `glyph slot’.A slot is a container where it*/
/*is possible to load any of the glyphs contained in its parent*/
/*face.*/
/* */
/*In other words, each time you call @FT_Load_Glyph or */
/*@FT_Load_Char, the slot’s content is erased by the new glyph data, */
/*i.e., the glyph’s metrics, its image (bitmap or outline), and*/
/*other control information. */
/* */
/*
/*See @FT_GlyphSlotRec for the publicly accessible glyph fields. */
/* */
typedef struct FT_GlyphSlotRec_*FT_GlyphSlot;
/*************************************************************************/
/* */
/*
/*FT_CharMap */
/* */
/*
/*A handle to a given character map.A charmap is used to translate */
/*character codes in a given encoding into glyph indexes for its */
/*parent’s face.Some font formats may provide several charmaps per */
/*font.*/
/* */
/*Each face object owns zero or more charmaps, but only one of them*/
/*can be `active’ and used by @FT_Get_Char_Index or @FT_Load_Char. */
/* */
/*The list of available charmaps in a face is available through the*/
/*`face->num_charmaps’ and `face->charmaps’ fields of @FT_FaceRec. */
/* */
/*The currently active charmap is available as `face->charmap’.*/
/*You should call @FT_Set_Charmap to change it.*/
/* */
/*
/*When a new face is created (either through @FT_New_Face or */
/*@FT_Open_Face), the library looks for a Unicode charmap within */
/*the list and automatically activates it. */
/* */
/*
/*See @FT_CharMapRec for the publicly accessible fields of a given */
/*character map. */
/* */
typedef struct FT_CharMapRec_*FT_CharMap;
/*************************************************************************/
/* */
/*
/*FT_ENC_TAG */
/* */
/*
/*This macro converts four-letter tags into an unsigned long.It is */
/*used to define `encoding’ identifiers (see @FT_Encoding).*/
/* */
/*
/*Since many 16-bit compilers don’t like 32-bit enumerations, you*/
/*should redefine this macro in case of problems to something like */
/*this:*/
/* */
/*{*/
/*#define FT_ENC_TAG( value, a, b, c, d )value */
/*}*/
/* */
/*to get a simple enumeration without assigning special numbers. */
/* */
#ifndef FT_ENC_TAG
#define FT_ENC_TAG( value, a, b, c, d )
value = ( ( (FT_UInt32)(a) << 24 ) |( (FT_UInt32)(b) << 16 ) |( (FT_UInt32)(c) <<8 ) |(FT_UInt32)(d) )#endif /* FT_ENC_TAG *//*************************************************************************//* *//*
/*FT_Encoding*/
/* */
/*
/*An enumeration used to specify character sets supported by */
/*charmaps.Used in the @FT_Select_Charmap API function.*/
/* */
/*
/*Despite the name, this enumeration lists specific character*/
/*repertories (i.e., charsets), and not text encoding methods (e.g., */
/*UTF-8, UTF-16, etc.).*/
/* */
/*Other encodings might be defined in the future.*/
/* */
/*
/*FT_ENCODING_NONE ::*/
/*The encoding value~0 is reserved.*/
/* */
/*FT_ENCODING_UNICODE :: */
/*Corresponds to the Unicode character set.This value covers */
/*all versions of the Unicode repertoire, including ASCII and*/
/*Latin-1.Most fonts include a Unicode charmap, but not all*/
/*of them. */
/* */
/*For example, if you want to access Unicode value U+1F028 (and*/
/*the font contains it), use value 0x1F028 as the input value for*/
/*@FT_Get_Char_Index.*/
/* */
/*FT_ENCODING_MS_SYMBOL :: */
/*Corresponds to the Microsoft Symbol encoding, used to encode */
/*mathematical symbols and wingdings.For more information, see */
/*`http://www.microsoft.com/typography/otspec/recom.htm’,*/
/*`http://www.kostis.net/charsets/symbol.htm’, and */
/*`http://www.kostis.net/charsets/wingding.htm’. */
/* */
/*This encoding uses character codes from the PUA (Private Unicode */
/*Area) in the range U+F020-U+F0FF.*/
/* */
/*FT_ENCODING_SJIS ::*/
/*Corresponds to Japanese SJIS encoding.More info at */
/*at `http://en.wikipedia.org/wiki/Shift_JIS’. */
/*See note on multi-byte encodings below.*/
/* */
/*FT_ENCODING_GB2312 ::*/
/*Corresponds to an encoding system for Simplified Chinese as used */
/*used in mainland China.*/
/* */
/*FT_ENCODING_BIG5 ::*/
/*Corresponds to an encoding system for Traditional Chinese as */
/*used in Taiwan and Hong Kong.*/
/* */
/*FT_ENCODING_WANSUNG :: */
/*Corresponds to the Korean encoding system known as Wansung.*/
/*For more information see */
/*`https://msdn.microsoft.com/en-US/goglobal/cc305154′.*/
/* */
/*FT_ENCODING_JOHAB :: */
/*The Korean standard character set (KS~C 5601-1992), which*/
/*corresponds to MS Windows code page 1361.This character set*/
/*includes all possible Hangeul character combinations.*/
/* */
/*FT_ENCODING_ADOBE_LATIN_1 :: */
/*Corresponds to a Latin-1 encoding as defined in a Type~1 */
/*PostScript font.It is limited to 256 character codes.*/
/* */
/*FT_ENCODING_ADOBE_STANDARD ::*/
/*Corresponds to the Adobe Standard encoding, as found in Type~1,*/
/*CFF, and OpenType/CFF fonts.It is limited to 256 character */
/*codes. */
/* */
/*FT_ENCODING_ADOBE_EXPERT ::*/
/*Corresponds to the Adobe Expert encoding, as found in Type~1,*/
/*CFF, and OpenType/CFF fonts.It is limited to 256 character */
/*codes. */
/* */
/*FT_ENCODING_ADOBE_CUSTOM ::*/
/*Corresponds to a custom encoding, as found in Type~1, CFF, and */
/*OpenType/CFF fonts.It is limited to 256 character codes. */
/* */
/*FT_ENCODING_APPLE_ROMAN :: */
/*Corresponds to the 8-bit Apple roman encoding.Many TrueType*/
/*and OpenType fonts contain a charmap for this encoding, since*/
/*older versions of Mac OS are able to use it. */
/* */
/*FT_ENCODING_OLD_LATIN_2 :: */
/*This value is deprecated and was never used nor reported by*/
/*FreeType.Don’t use or test for it. */
/* */
/*FT_ENCODING_MS_SJIS :: */
/*Same as FT_ENCODING_SJIS.Deprecated. */
/* */
/*FT_ENCODING_MS_GB2312 :: */
/*Same as FT_ENCODING_GB2312.Deprecated. */
/* */
/*FT_ENCODING_MS_BIG5 :: */
/*Same as FT_ENCODING_BIG5.Deprecated. */
/* */
/*FT_ENCODING_MS_WANSUNG ::*/
/*Same as FT_ENCODING_WANSUNG.Deprecated.*/
/* */
/*FT_ENCODING_MS_JOHAB ::*/
/*Same as FT_ENCODING_JOHAB.Deprecated.*/
/* */
/*
/*By default, FreeType automatically synthesizes a Unicode charmap */
/*for PostScript fonts, using their glyph names dictionaries.*/
/*However, it also reports the encodings defined explicitly in the */
/*font file, for the cases when they are needed, with the Adobe*/
/*values as well.*/
/* */
/*FT_ENCODING_NONE is set by the BDF and PCF drivers if the charmap*/
/*is neither Unicode nor ISO-8859-1 (otherwise it is set to*/
/*FT_ENCODING_UNICODE).Use @FT_Get_BDF_Charset_ID to find out*/
/*which encoding is really present.If, for example, the*/
/*`cs_registry’ field is `KOI8′ and the `cs_encoding’ field is `R’,*/
/*the font is encoded in KOI8-R. */
/* */
/*FT_ENCODING_NONE is always set (with a single exception) by the*/
/*winfonts driver.Use @FT_Get_WinFNT_Header and examine the*/
/*`charset’ field of the @FT_WinFNT_HeaderRec structure to find out*/
/*which encoding is really present.For example,*/
/*@FT_WinFNT_ID_CP1251 (204) means Windows code page 1251 (for */
/*Russian).*/
/* */
/*FT_ENCODING_NONE is set if `platform_id’ is @TT_PLATFORM_MACINTOSH */
/*and `encoding_id’ is not @TT_MAC_ID_ROMAN (otherwise it is set to*/
/*FT_ENCODING_APPLE_ROMAN).*/
/* */
/*If `platform_id’ is @TT_PLATFORM_MACINTOSH, use the function */
/*@FT_Get_CMap_Language_ID to query the Mac language ID that may */
/*be needed to be able to distinguish Apple encoding variants.See*/
/* */
/*http://www.unicode.org/Public/MAPPINGS/VENDORS/APPLE/Readme.txt*/
/* */
/*to get an idea how to do that.Basically, if the language ID*/
/*is~0, don’t use it, otherwise subtract 1 from the language ID. */
/*Then examine `encoding_id’.If, for example, `encoding_id’ is */
/*@TT_MAC_ID_ROMAN and the language ID (minus~1) is*/
/*`TT_MAC_LANGID_GREEK’, it is the Greek encoding, not Roman.*/
/*@TT_MAC_ID_ARABIC with `TT_MAC_LANGID_FARSI’ means the Farsi */
/*variant the Arabic encoding. */
/* */
typedef enumFT_Encoding_
{
FT_ENC_TAG( FT_ENCODING_NONE, 0, 0, 0, 0 ),
FT_ENC_TAG( FT_ENCODING_MS_SYMBOL, ‘s’, ‘y’, ‘m’, ‘b’ ),
FT_ENC_TAG( FT_ENCODING_UNICODE, ‘u’, ‘n’, ‘i’, ‘c’ ),
FT_ENC_TAG( FT_ENCODING_SJIS,‘s’, ‘j’, ‘i’, ‘s’ ),
FT_ENC_TAG( FT_ENCODING_GB2312,‘g’, ‘b’, ‘ ‘, ‘ ‘ ),
FT_ENC_TAG( FT_ENCODING_BIG5,‘b’, ‘i’, ‘g’, ‘5’ ),
FT_ENC_TAG( FT_ENCODING_WANSUNG, ‘w’, ‘a’, ‘n’, ‘s’ ),
FT_ENC_TAG( FT_ENCODING_JOHAB, ‘j’, ‘o’, ‘h’, ‘a’ ),
/* for backwards compatibility */
FT_ENCODING_MS_SJIS= FT_ENCODING_SJIS,
FT_ENCODING_MS_GB2312= FT_ENCODING_GB2312,
FT_ENCODING_MS_BIG5= FT_ENCODING_BIG5,
FT_ENCODING_MS_WANSUNG = FT_ENCODING_WANSUNG,
FT_ENCODING_MS_JOHAB = FT_ENCODING_JOHAB,
FT_ENC_TAG( FT_ENCODING_ADOBE_STANDARD, ‘A’, ‘D’, ‘O’, ‘B’ ),
FT_ENC_TAG( FT_ENCODING_ADOBE_EXPERT, ‘A’, ‘D’, ‘B’, ‘E’ ),
FT_ENC_TAG( FT_ENCODING_ADOBE_CUSTOM, ‘A’, ‘D’, ‘B’, ‘C’ ),
FT_ENC_TAG( FT_ENCODING_ADOBE_LATIN_1,‘l’, ‘a’, ‘t’, ‘1’ ),
FT_ENC_TAG( FT_ENCODING_OLD_LATIN_2, ‘l’, ‘a’, ‘t’, ‘2’ ),
FT_ENC_TAG( FT_ENCODING_APPLE_ROMAN, ‘a’, ‘r’, ‘m’, ‘n’ )
} FT_Encoding;
/* these constants are deprecated; use the corresponding `FT_Encoding’ */
/* values instead*/
#define ft_encoding_noneFT_ENCODING_NONE
#define ft_encoding_unicode FT_ENCODING_UNICODE
#define ft_encoding_symbolFT_ENCODING_MS_SYMBOL
#define ft_encoding_latin_1 FT_ENCODING_ADOBE_LATIN_1
#define ft_encoding_latin_2 FT_ENCODING_OLD_LATIN_2
#define ft_encoding_sjisFT_ENCODING_SJIS
#define ft_encoding_gb2312FT_ENCODING_GB2312
#define ft_encoding_big5FT_ENCODING_BIG5
#define ft_encoding_wansung FT_ENCODING_WANSUNG
#define ft_encoding_johab FT_ENCODING_JOHAB
#define ft_encoding_adobe_standardFT_ENCODING_ADOBE_STANDARD
#define ft_encoding_adobe_expertFT_ENCODING_ADOBE_EXPERT
#define ft_encoding_adobe_customFT_ENCODING_ADOBE_CUSTOM
#define ft_encoding_apple_roman FT_ENCODING_APPLE_ROMAN
/*************************************************************************/
/* */
/*
/*FT_CharMapRec*/
/* */
/*
/*The base charmap structure.*/
/* */
/*
/*face:: A handle to the parent face object. */
/* */
/*encoding:: An @FT_Encoding tag identifying the charmap.Use */
/* this with @FT_Select_Charmap. */
/* */
/*platform_id :: An ID number describing the platform for the*/
/* following encoding ID.This comes directly from*/
/* the TrueType specification and should be emulated */
/* for other formats.*/
/* */
/*encoding_id :: A platform specific encoding number.This also */
/* comes from the TrueType specification and should be */
/* emulated similarly. */
/* */
typedef structFT_CharMapRec_
{
FT_Faceface;
FT_Encodingencoding;
FT_UShortplatform_id;
FT_UShortencoding_id;
} FT_CharMapRec;
/*************************************************************************/
/*************************************************************************/
/* */
/* B A S E O B J E C T C L A S S E S */
/* */
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/* */
/*
/*FT_Face_Internal */
/* */
/*
/*An opaque handle to an `FT_Face_InternalRec’ structure, used to*/
/*model private data of a given @FT_Face object. */
/* */
/*This structure might change between releases of FreeType~2 and is*/
/*not generally available to client applications.*/
/* */
typedef struct FT_Face_InternalRec_*FT_Face_Internal;
/*************************************************************************/
/* */
/*
/*FT_FaceRec */
/* */
/*
/*FreeType root face class structure.A face object models a*/
/*typeface in a font file. */
/* */
/*
/*num_faces :: The number of faces in the font file.Some */
/* font formats can have multiple faces in */
/* a font file.*/
/* */
/*face_index:: This field holds two different values.*/
/* Bits 0-15 are the index of the face in the*/
/* font file (starting with value~0).They*/
/* are set to~0 if there is only one face in */
/* the font file.*/
/* */
/* Bits 16-30 are relevant to GX variation */
/* fonts only, holding the named instance*/
/* index for the current face index (starting*/
/* with value~1; value~0 indicates font access */
/* without GX variation data).For non-GX */
/* fonts, bits 16-30 are ignored.If we have*/
/* the third named instance of face~4, say,*/
/* `face_index’ is set to 0x00030004.*/
/* */
/* Bit 31 is always zero (this is, */
/* `face_index’ is always a positive value). */
/* */
/*face_flags:: A set of bit flags that give important*/
/* information about the face; see */
/* @FT_FACE_FLAG_XXX for the details.*/
/* */
/*style_flags :: The lower 16~bits contain a set of bit*/
/* flags indicating the style of the face; see */
/* @FT_STYLE_FLAG_XXX for the details.Bits */
/* 16-30 hold the number of named instances*/
/* available for the current face if we have a */
/* GX variation (sub)font.Bit 31 is always */
/* zero (this is, `style_flags’ is always a*/
/* positive value).*/
/* */
/*num_glyphs:: The number of glyphs in the face.If the */
/* face is scalable and has sbits (see */
/* `num_fixed_sizes’), it is set to the number */
/* of outline glyphs.*/
/* */
/* For CID-keyed fonts, this value gives the */
/* highest CID used in the font. */
/* */
/*family_name :: The face’s family name.This is an ASCII */
/* string, usually in English, that describes*/
/* the typeface’s family (like `Times New*/
/* Roman’, `Bodoni’, `Garamond’, etc).This */
/* is a least common denominator used to list*/
/* fonts.Some formats (TrueType & OpenType)*/
/* provide localized and Unicode versions of */
/* this string.Applications should use the */
/* format specific interface to access them. */
/* Can be NULL (e.g., in fonts embedded in a */
/* PDF file).*/
/* */
/* In case the font doesn’t provide a specific */
/* family name entry, FreeType tries to*/
/* synthesize one, deriving it from other name */
/* entries.*/
/* */
/*style_name:: The face’s style name.This is an ASCII*/
/* string, usually in English, that describes*/
/* the typeface’s style (like `Italic’,*/
/* `Bold’, `Condensed’, etc).Not all font*/
/* formats provide a style name, so this field */
/* is optional, and can be set to NULL.As*/
/* for `family_name’, some formats provide */
/* localized and Unicode versions of this*/
/* string.Applications should use the format */
/* specific interface to access them.*/
/* */
/*num_fixed_sizes :: The number of bitmap strikes in the face. */
/* Even if the face is scalable, there might */
/* still be bitmap strikes, which are called */
/* `sbits’ in that case. */
/* */
/*available_sizes :: An array of @FT_Bitmap_Size for all bitmap*/
/* strikes in the face.It is set to NULL if*/
/* there is no bitmap strike.*/
/* */
/*num_charmaps:: The number of charmaps in the face. */
/* */
/*charmaps:: An array of the charmaps of the face. */
/* */
/*generic :: A field reserved for client uses.See the*/
/* @FT_Generic type description. */
/* */
/*bbox:: The font bounding box.Coordinates are */
/* expressed in font units (see*/
/* `units_per_EM’).The box is large enough */
/* to contain any glyph from the font.Thus,*/
/* `bbox.yMax’ can be seen as the `maximum */
/* ascender’, and `bbox.yMin’ as the `minimum*/
/* descender’.Only relevant for scalable */
/* formats.*/
/* */
/* Note that the bounding box might be off by*/
/* (at least) one pixel for hinted fonts.See */
/* @FT_Size_Metrics for further discussion.*/
/* */
/*units_per_EM:: The number of font units per EM square for*/
/* this face.This is typically 2048 for*/
/* TrueType fonts, and 1000 for Type~1 fonts.*/
/* Only relevant for scalable formats. */
/* */
/*ascender:: The typographic ascender of the face, */
/* expressed in font units.For font formats*/
/* not having this information, it is set to */
/* `bbox.yMax’.Only relevant for scalable*/
/* formats.*/
/* */
/*descender :: The typographic descender of the face,*/
/* expressed in font units.For font formats*/
/* not having this information, it is set to */
/* `bbox.yMin’.Note that this field is */
/* usually negative.Only relevant for*/
/* scalable formats. */
/* */
/*height:: This value is the vertical distance */
/* between two consecutive baselines,*/
/* expressed in font units.It is always*/
/* positive.Only relevant for scalable */
/* formats.*/
/* */
/* If you want the global glyph height, use*/
/* `ascender – descender’. */
/* */
/*max_advance_width :: The maximum advance width, in font units, */
/* for all glyphs in this face.This can be */
/* used to make word wrapping computations */
/* faster.Only relevant for scalable */
/* formats.*/
/* */
/*max_advance_height:: The maximum advance height, in font units,*/
/* for all glyphs in this face.This is only*/
/* relevant for vertical layouts, and is set */
/* to `height’ for fonts that do not provide */
/* vertical metrics.Only relevant for*/
/* scalable formats. */
/* */
/*underline_position:: The position, in font units, of the */
/* underline line for this face.It is the*/
/* center of the underlining stem.Only */
/* relevant for scalable formats.*/
/* */
/*underline_thickness :: The thickness, in font units, of the*/
/* underline for this face.Only relevant for */
/* scalable formats. */
/* */
/*glyph :: The face’s associated glyph slot(s).*/
/* */
/*size:: The current active size for this face.*/
/* */
/*charmap :: The current active charmap for this face. */
/* */
/*
/*Fields may be changed after a call to @FT_Attach_File or */
/*@FT_Attach_Stream. */
/* */
typedef structFT_FaceRec_
{
FT_Long num_faces;
FT_Long face_index;
FT_Long face_flags;
FT_Long style_flags;
FT_Long num_glyphs;
FT_String*family_name;
FT_String*style_name;
FT_Intnum_fixed_sizes;
FT_Bitmap_Size* available_sizes;
FT_Intnum_charmaps;
FT_CharMap* charmaps;
FT_Genericgeneric;
/*# The following member variables (down to `underline_thickness’) */
/*# are only relevant to scalable outlines; cf. @FT_Bitmap_Size*/
/*# for bitmap fonts.*/
FT_BBox bbox;
FT_UShort units_per_EM;
FT_Shortascender;
FT_Shortdescender;
FT_Shortheight;
FT_Shortmax_advance_width;
FT_Shortmax_advance_height;
FT_Shortunderline_position;
FT_Shortunderline_thickness;
FT_GlyphSlotglyph;
FT_Size size;
FT_CharMapcharmap;
/*@private begin */
FT_Driver driver;
FT_Memory memory;
FT_Stream stream;
FT_ListRecsizes_list;
FT_Genericautohint; /* face-specific auto-hinter data */
void* extensions; /* unused */
FT_Face_Internalinternal;
/*@private end */
} FT_FaceRec;
/*************************************************************************/
/* */
/*
/*FT_FACE_FLAG_XXX */
/* */
/*
/*A list of bit flags used in the `face_flags’ field of the*/
/*@FT_FaceRec structure.They inform client applications of */
/*properties of the corresponding face.*/
/* */
/*
/*FT_FACE_FLAG_SCALABLE :: */
/*Indicates that the face contains outline glyphs.This doesn’t */
/*prevent bitmap strikes, i.e., a face can have both this and*/
/*and @FT_FACE_FLAG_FIXED_SIZES set. */
/* */
/*FT_FACE_FLAG_FIXED_SIZES ::*/
/*Indicates that the face contains bitmap strikes.See also the */
/*`num_fixed_sizes’ and `available_sizes’ fields of @FT_FaceRec. */
/* */
/*FT_FACE_FLAG_FIXED_WIDTH ::*/
/*Indicates that the face contains fixed-width characters (like*/
/*Courier, Lucido, MonoType, etc.).*/
/* */
/*FT_FACE_FLAG_SFNT :: */
/*Indicates that the face uses the `sfnt’ storage scheme.For */
/*now, this means TrueType and OpenType. */
/* */
/*FT_FACE_FLAG_HORIZONTAL :: */
/*Indicates that the face contains horizontal glyph metrics.This */
/*should be set for all common formats.*/
/* */
/*FT_FACE_FLAG_VERTICAL :: */
/*Indicates that the face contains vertical glyph metrics.This */
/*is only available in some formats, not all of them.*/
/* */
/*FT_FACE_FLAG_KERNING ::*/
/*Indicates that the face contains kerning information.If set, */
/*the kerning distance can be retrieved through the function */
/*@FT_Get_Kerning.Otherwise the function always return the */
/*vector (0,0).Note that FreeType doesn’t handle kerning data*/
/*from the `GPOS’ table (as present in some OpenType fonts). */
/* */
/*FT_FACE_FLAG_FAST_GLYPHS ::*/
/*THIS FLAG IS DEPRECATED.DO NOT USE OR TEST IT. */
/* */
/*FT_FACE_FLAG_MULTIPLE_MASTERS :: */
/*Indicates that the font contains multiple masters and is capable */
/*of interpolating between them.See the multiple-masters */
/*specific API for details.*/
/* */
/*FT_FACE_FLAG_GLYPH_NAMES ::*/
/*Indicates that the font contains glyph names that can be */
/*retrieved through @FT_Get_Glyph_Name.Note that some TrueType */
/*fonts contain broken glyph name tables.Use the function*/
/*@FT_Has_PS_Glyph_Names when needed.*/
/* */
/*FT_FACE_FLAG_EXTERNAL_STREAM ::*/
/*Used internally by FreeType to indicate that a face’s stream was */
/*provided by the client application and should not be destroyed */
/*when @FT_Done_Face is called.Don’t read or test this flag. */
/* */
/*FT_FACE_FLAG_HINTER :: */
/*Set if the font driver has a hinting machine of its own.For*/
/*example, with TrueType fonts, it makes sense to use data from*/
/*the SFNT `gasp’ table only if the native TrueType hinting engine */
/*(with the bytecode interpreter) is available and active. */
/* */
/*FT_FACE_FLAG_CID_KEYED ::*/
/*Set if the font is CID-keyed.In that case, the font is not */
/*accessed by glyph indices but by CID values.For subsetted*/
/*CID-keyed fonts this has the consequence that not all index*/
/*values are a valid argument to FT_Load_Glyph.Only the CID*/
/*values for which corresponding glyphs in the subsetted font*/
/*exist make FT_Load_Glyph return successfully; in all other cases */
/*you get an `FT_Err_Invalid_Argument’ error.*/
/* */
/*Note that CID-keyed fonts that are in an SFNT wrapper don’t*/
/*have this flag set since the glyphs are accessed in the normal */
/*way (using contiguous indices); the `CID-ness’ isn’t visible to*/
/*the application. */
/* */
/*FT_FACE_FLAG_TRICKY :: */
/*Set if the font is `tricky’, this is, it always needs the*/
/*font format’s native hinting engine to get a reasonable result.*/
/*A typical example is the Chinese font `mingli.ttf’ that uses */
/*TrueType bytecode instructions to move and scale all of its*/
/*subglyphs. */
/* */
/*It is not possible to auto-hint such fonts using */
/*@FT_LOAD_FORCE_AUTOHINT; it will also ignore */
/*@FT_LOAD_NO_HINTING.You have to set both @FT_LOAD_NO_HINTING */
/*and @FT_LOAD_NO_AUTOHINT to really disable hinting; however, you */
/*probably never want this except for demonstration purposes.*/
/* */
/*Currently, there are about a dozen TrueType fonts in the list of */
/*tricky fonts; they are hard-coded in file `ttobjs.c’.*/
/* */
/*FT_FACE_FLAG_COLOR ::*/
/*Set if the font has color glyph tables.To access color glyphs*/
/*use @FT_LOAD_COLOR.*/
/* */
#define FT_FACE_FLAG_SCALABLE( 1L <<0 )#define FT_FACE_FLAG_FIXED_SIZES ( 1L <<1 )#define FT_FACE_FLAG_FIXED_WIDTH ( 1L <<2 )#define FT_FACE_FLAG_SFNT( 1L <<3 )#define FT_FACE_FLAG_HORIZONTAL( 1L <<4 )#define FT_FACE_FLAG_VERTICAL( 1L <<5 )#define FT_FACE_FLAG_KERNING ( 1L <<6 )#define FT_FACE_FLAG_FAST_GLYPHS ( 1L <<7 )#define FT_FACE_FLAG_MULTIPLE_MASTERS( 1L <<8 )#define FT_FACE_FLAG_GLYPH_NAMES ( 1L <<9 )#define FT_FACE_FLAG_EXTERNAL_STREAM ( 1L << 10 )#define FT_FACE_FLAG_HINTER( 1L << 11 )#define FT_FACE_FLAG_CID_KEYED ( 1L << 12 )#define FT_FACE_FLAG_TRICKY( 1L << 13 )#define FT_FACE_FLAG_COLOR ( 1L << 14 )/************************************************************************* * * @macro: * FT_HAS_HORIZONTAL( face ) * * @description: * A macro that returns true whenever a face object contains * horizontal metrics (this is true for all font formats though). * * @also: * @FT_HAS_VERTICAL can be used to check for vertical metrics. * */#define FT_HAS_HORIZONTAL( face ) ( face->face_flags & FT_FACE_FLAG_HORIZONTAL )
/*************************************************************************
*
* @macro:
* FT_HAS_VERTICAL( face )
*
* @description:
* A macro that returns true whenever a face object contains real
* vertical metrics (and not only synthesized ones).
*
*/
#define FT_HAS_VERTICAL( face )
( face->face_flags & FT_FACE_FLAG_VERTICAL )
/*************************************************************************
*
* @macro:
* FT_HAS_KERNING( face )
*
* @description:
* A macro that returns true whenever a face object contains kerning
* data that can be accessed with @FT_Get_Kerning.
*
*/
#define FT_HAS_KERNING( face )
( face->face_flags & FT_FACE_FLAG_KERNING )
/*************************************************************************
*
* @macro:
* FT_IS_SCALABLE( face )
*
* @description:
* A macro that returns true whenever a face object contains a scalable
* font face (true for TrueType, Type~1, Type~42, CID, OpenType/CFF,
* and PFR font formats.
*
*/
#define FT_IS_SCALABLE( face )
( face->face_flags & FT_FACE_FLAG_SCALABLE )
/*************************************************************************
*
* @macro:
* FT_IS_SFNT( face )
*
* @description:
* A macro that returns true whenever a face object contains a font
* whose format is based on the SFNT storage scheme.This usually
* means: TrueType fonts, OpenType fonts, as well as SFNT-based embedded
* bitmap fonts.
*
* If this macro is true, all functions defined in @FT_SFNT_NAMES_H and
* @FT_TRUETYPE_TABLES_H are available.
*
*/
#define FT_IS_SFNT( face )
( face->face_flags & FT_FACE_FLAG_SFNT )
/*************************************************************************
*
* @macro:
* FT_IS_FIXED_WIDTH( face )
*
* @description:
* A macro that returns true whenever a face object contains a font face
* that contains fixed-width (or `monospace’, `fixed-pitch’, etc.)
* glyphs.
*
*/
#define FT_IS_FIXED_WIDTH( face )
( face->face_flags & FT_FACE_FLAG_FIXED_WIDTH )
/*************************************************************************
*
* @macro:
* FT_HAS_FIXED_SIZES( face )
*
* @description:
* A macro that returns true whenever a face object contains some
* embedded bitmaps.See the `available_sizes’ field of the
* @FT_FaceRec structure.
*
*/
#define FT_HAS_FIXED_SIZES( face )
( face->face_flags & FT_FACE_FLAG_FIXED_SIZES )
/*************************************************************************
*
* @macro:
* FT_HAS_FAST_GLYPHS( face )
*
* @description:
* Deprecated.
*
*/
#define FT_HAS_FAST_GLYPHS( face )0
/*************************************************************************
*
* @macro:
* FT_HAS_GLYPH_NAMES( face )
*
* @description:
* A macro that returns true whenever a face object contains some glyph
* names that can be accessed through @FT_Get_Glyph_Name.
*
*/
#define FT_HAS_GLYPH_NAMES( face )
( face->face_flags & FT_FACE_FLAG_GLYPH_NAMES )
/*************************************************************************
*
* @macro:
* FT_HAS_MULTIPLE_MASTERS( face )
*
* @description:
* A macro that returns true whenever a face object contains some
* multiple masters.The functions provided by @FT_MULTIPLE_MASTERS_H
* are then available to choose the exact design you want.
*
*/
#define FT_HAS_MULTIPLE_MASTERS( face )
( face->face_flags & FT_FACE_FLAG_MULTIPLE_MASTERS )
/*************************************************************************
*
* @macro:
* FT_IS_CID_KEYED( face )
*
* @description:
* A macro that returns true whenever a face object contains a CID-keyed
* font.See the discussion of @FT_FACE_FLAG_CID_KEYED for more
* details.
*
* If this macro is true, all functions defined in @FT_CID_H are
* available.
*
*/
#define FT_IS_CID_KEYED( face )
( face->face_flags & FT_FACE_FLAG_CID_KEYED )
/*************************************************************************
*
* @macro:
* FT_IS_TRICKY( face )
*
* @description:
* A macro that returns true whenever a face represents a `tricky’ font.
* See the discussion of @FT_FACE_FLAG_TRICKY for more details.
*
*/
#define FT_IS_TRICKY( face )
( face->face_flags & FT_FACE_FLAG_TRICKY )
/*************************************************************************
*
* @macro:
* FT_HAS_COLOR( face )
*
* @description:
* A macro that returns true whenever a face object contains
* tables for color glyphs.
*
*/
#define FT_HAS_COLOR( face )
( face->face_flags & FT_FACE_FLAG_COLOR )
/*************************************************************************/
/* */
/*
/*FT_STYLE_FLAG_XXX*/
/* */
/*
/*A list of bit flags used to indicate the style of a given face.*/
/*These are used in the `style_flags’ field of @FT_FaceRec.*/
/* */
/*
/*FT_STYLE_FLAG_ITALIC ::*/
/*Indicates that a given face style is italic or oblique.*/
/* */
/*FT_STYLE_FLAG_BOLD ::*/
/*Indicates that a given face is bold. */
/* */
/*
/*The style information as provided by FreeType is very basic.More */
/*details are beyond the scope and should be done on a higher level*/
/*(for example, by analyzing various fields of the `OS/2′ table in */
/*SFNT based fonts). */
/* */
#define FT_STYLE_FLAG_ITALIC( 1 << 0 )#define FT_STYLE_FLAG_BOLD( 1 << 1 )/*************************************************************************//* *//*
/*FT_Size_Internal */
/* */
/*
/*An opaque handle to an `FT_Size_InternalRec’ structure, used to*/
/*model private data of a given @FT_Size object. */
/* */
typedef struct FT_Size_InternalRec_*FT_Size_Internal;
/*************************************************************************/
/* */
/*
/*FT_Size_Metrics*/
/* */
/*
/*The size metrics structure gives the metrics of a size object. */
/* */
/*
/*x_ppem :: The width of the scaled EM square in pixels, hence */
/*the term `ppem’ (pixels per EM).It is also */
/*referred to as `nominal width’.*/
/* */
/*y_ppem :: The height of the scaled EM square in pixels,*/
/*hence the term `ppem’ (pixels per EM).It is also */
/*referred to as `nominal height’. */
/* */
/*x_scale:: A 16.16 fractional scaling value used to convert */
/*horizontal metrics from font units to 26.6 */
/*fractional pixels.Only relevant for scalable */
/*font formats.*/
/* */
/*y_scale:: A 16.16 fractional scaling value used to convert */
/*vertical metrics from font units to 26.6 */
/*fractional pixels.Only relevant for scalable */
/*font formats.*/
/* */
/*ascender :: The ascender in 26.6 fractional pixels.See */
/*@FT_FaceRec for the details. */
/* */
/*descender:: The descender in 26.6 fractional pixels.See*/
/*@FT_FaceRec for the details. */
/* */
/*height :: The height in 26.6 fractional pixels.See */
/*@FT_FaceRec for the details. */
/* */
/*max_advance:: The maximum advance width in 26.6 fractional */
/*pixels.See @FT_FaceRec for the details.*/
/* */
/*
/*The scaling values, if relevant, are determined first during a */
/*size changing operation.The remaining fields are then set by the */
/*driver.For scalable formats, they are usually set to scaled*/
/*values of the corresponding fields in @FT_FaceRec. */
/* */
/*Note that due to glyph hinting, these values might not be exact*/
/*for certain fonts.Thus they must be treated as unreliable*/
/*with an error margin of at least one pixel!*/
/* */
/*Indeed, the only way to get the exact metrics is to render _all_ */
/*glyphs.As this would be a definite performance hit, it is up to*/
/*client applications to perform such computations.*/
/* */
/*The FT_Size_Metrics structure is valid for bitmap fonts also.*/
/* */
typedef structFT_Size_Metrics_
{
FT_UShortx_ppem;/* horizontal pixels per EM */
FT_UShorty_ppem;/* vertical pixels per EM */
FT_Fixed x_scale; /* scaling values used to convert font*/
FT_Fixed y_scale; /* units to 26.6 fractional pixels*/
FT_Pos ascender;/* ascender in 26.6 frac. pixels*/
FT_Pos descender; /* descender in 26.6 frac. pixels */
FT_Pos height;/* text height in 26.6 frac. pixels */
FT_Pos max_advance; /* max horizontal advance, in 26.6 pixels */
} FT_Size_Metrics;
/*************************************************************************/
/* */
/*
/*FT_SizeRec */
/* */
/*
/*FreeType root size class structure.A size object models a face */
/*object at a given size.*/
/* */
/*
/*face:: Handle to the parent face object. */
/* */
/*generic :: A typeless pointer, unused by the FreeType library or */
/* any of its drivers.It can be used by client */
/* applications to link their own data to each size*/
/* object. */
/* */
/*metrics :: Metrics for this size object.This field is read-only. */
/* */
typedef structFT_SizeRec_
{
FT_Face face;/* parent face object*/
FT_Genericgeneric; /* generic pointer for client uses */
FT_Size_Metrics metrics; /* size metrics*/
FT_Size_Internalinternal;
} FT_SizeRec;
/*************************************************************************/
/* */
/*
/*FT_SubGlyph*/
/* */
/*
/*The subglyph structure is an internal object used to describe*/
/*subglyphs (for example, in the case of composites).*/
/* */
/*
/*The subglyph implementation is not part of the high-level API, */
/*hence the forward structure declaration. */
/* */
/*You can however retrieve subglyph information with */
/*@FT_Get_SubGlyph_Info. */
/* */
typedef struct FT_SubGlyphRec_*FT_SubGlyph;
/*************************************************************************/
/* */
/*
/*FT_Slot_Internal */
/* */
/*
/*An opaque handle to an `FT_Slot_InternalRec’ structure, used to*/
/*model private data of a given @FT_GlyphSlot object.*/
/* */
typedef struct FT_Slot_InternalRec_*FT_Slot_Internal;
/*************************************************************************/
/* */
/*
/*FT_GlyphSlotRec*/
/* */
/*
/*FreeType root glyph slot class structure.A glyph slot is a */
/*container where individual glyphs can be loaded, be they in*/
/*outline or bitmap format.*/
/* */
/*
/*library :: A handle to the FreeType library instance */
/* this slot belongs to. */
/* */
/*face:: A handle to the parent face object. */
/* */
/*next:: In some cases (like some font tools), several */
/* glyph slots per face object can be a good */
/* thing.As this is rare, the glyph slots are*/
/* listed through a direct, single-linked list */
/* using its `next’ field. */
/* */
/*generic :: A typeless pointer unused by the FreeType */
/* library or any of its drivers.It can be */
/* used by client applications to link their own */
/* data to each glyph slot object. */
/* */
/*metrics :: The metrics of the last loaded glyph in the */
/* slot.The returned values depend on the last */
/* load flags (see the @FT_Load_Glyph API*/
/* function) and can be expressed either in 26.6 */
/* fractional pixels or font units.*/
/* */
/* Note that even when the glyph image is*/
/* transformed, the metrics are not. */
/* */
/*linearHoriAdvance :: The advance width of the unhinted glyph.*/
/* Its value is expressed in 16.16 fractional*/
/* pixels, unless @FT_LOAD_LINEAR_DESIGN is set*/
/* when loading the glyph.This field can be*/
/* important to perform correct WYSIWYG layout.*/
/* Only relevant for outline glyphs. */
/* */
/*linearVertAdvance :: The advance height of the unhinted glyph. */
/* Its value is expressed in 16.16 fractional*/
/* pixels, unless @FT_LOAD_LINEAR_DESIGN is set*/
/* when loading the glyph.This field can be*/
/* important to perform correct WYSIWYG layout.*/
/* Only relevant for outline glyphs. */
/* */
/*advance :: This shorthand is, depending on */
/* @FT_LOAD_IGNORE_TRANSFORM, the transformed*/
/* (hinted) advance width for the glyph, in 26.6 */
/* fractional pixel format.As specified with */
/* @FT_LOAD_VERTICAL_LAYOUT, it uses either the*/
/* `horiAdvance’ or the `vertAdvance’ value of */
/* `metrics’ field.*/
/* */
/*format:: This field indicates the format of the image*/
/* contained in the glyph slot.Typically */
/* @FT_GLYPH_FORMAT_BITMAP,*/
/* @FT_GLYPH_FORMAT_OUTLINE, or*/
/* @FT_GLYPH_FORMAT_COMPOSITE, but others are*/
/* possible. */
/* */
/*bitmap:: This field is used as a bitmap descriptor */
/* when the slot format is */
/* @FT_GLYPH_FORMAT_BITMAP.Note that the */
/* address and content of the bitmap buffer can*/
/* change between calls of @FT_Load_Glyph and a*/
/* few other functions.*/
/* */
/*bitmap_left :: The bitmap’s left bearing expressed in*/
/* integer pixels.Only valid if the format is*/
/* @FT_GLYPH_FORMAT_BITMAP, this is, if the*/
/* glyph slot contains a bitmap. */
/* */
/*bitmap_top:: The bitmap’s top bearing expressed in integer */
/* pixels.Remember that this is the distance */
/* from the baseline to the top-most glyph */
/* scanline, upwards y~coordinates being */
/* *positive*. */
/* */
/*outline :: The outline descriptor for the current glyph*/
/* image if its format is*/
/* @FT_GLYPH_FORMAT_OUTLINE.Once a glyph is*/
/* loaded, `outline’ can be transformed, */
/* distorted, embolded, etc.However, it must */
/* not be freed. */
/* */
/*num_subglyphs :: The number of subglyphs in a composite glyph. */
/* This field is only valid for the composite*/
/* glyph format that should normally only be */
/* loaded with the @FT_LOAD_NO_RECURSE flag. */
/* */
/*subglyphs :: An array of subglyph descriptors for*/
/* composite glyphs.There are `num_subglyphs’*/
/* elements in there.Currently internal to */
/* FreeType. */
/* */
/*control_data:: Certain font drivers can also return the*/
/* control data for a given glyph image (e.g.*/
/* TrueType bytecode, Type~1 charstrings, etc.). */
/* This field is a pointer to such data. */
/* */
/*control_len :: This is the length in bytes of the control*/
/* data. */
/* */
/*other :: Really wicked formats can use this pointer to */
/* present their own glyph image to client */
/* applications.Note that the application*/
/* needs to know about the image format. */
/* */
/*lsb_delta :: The difference between hinted and unhinted*/
/* left side bearing while auto-hinting is */
/* active.Zero otherwise.*/
/* */
/*rsb_delta :: The difference between hinted and unhinted*/
/* right side bearing while auto-hinting is*/
/* active.Zero otherwise.*/
/* */
/*
/*If @FT_Load_Glyph is called with default flags (see*/
/*@FT_LOAD_DEFAULT) the glyph image is loaded in the glyph slot in */
/*its native format (e.g., an outline glyph for TrueType and Type~1*/
/*formats).*/
/* */
/*This image can later be converted into a bitmap by calling */
/*@FT_Render_Glyph.This function finds the current renderer for*/
/*the native image’s format, then invokes it.*/
/* */
/*The renderer is in charge of transforming the native image through */
/*the slot’s face transformation fields, then converting it into a */
/*bitmap that is returned in `slot->bitmap’. */
/* */
/*Note that `slot->bitmap_left’ and `slot->bitmap_top’ are also used */
/*to specify the position of the bitmap relative to the current pen*/
/*position (e.g., coordinates (0,0) on the baseline).Of course,*/
/*`slot->format’ is also changed to @FT_GLYPH_FORMAT_BITMAP. */
/* */
/*
/*Here is a small pseudo code fragment that shows how to use */
/*`lsb_delta’ and `rsb_delta’: */
/* */
/*{*/
/*FT_Posorigin_x = 0;*/
/*FT_Posprev_rsb_delta = 0;*/
/* */
/* */
/*for all glyphs do*/
/*
/* */
/*
/* */
/*if ( prev_rsb_delta – face->glyph->lsb_delta >= 32 ) */
/*origin_x -= 64;*/
/*else if ( prev_rsb_delta – face->glyph->lsb_delta < -32 )*//*origin_x += 64;*//* *//*prev_rsb_delta = face->glyph->rsb_delta; */
/* */
/*
/* */
/*origin_x += face->glyph->advance.x;*/
/*endfor */
/*}*/
/* */
typedef structFT_GlyphSlotRec_
{
FT_Librarylibrary;
FT_Face face;
FT_GlyphSlotnext;
FT_UInt reserved; /* retained for binary compatibility */
FT_Genericgeneric;
FT_Glyph_Metricsmetrics;
FT_FixedlinearHoriAdvance;
FT_FixedlinearVertAdvance;
FT_Vector advance;
FT_Glyph_Format format;
FT_Bitmap bitmap;
FT_Intbitmap_left;
FT_Intbitmap_top;
FT_Outlineoutline;
FT_UInt num_subglyphs;
FT_SubGlyph subglyphs;
void* control_data;
longcontrol_len;
FT_Poslsb_delta;
FT_Posrsb_delta;
void* other;
FT_Slot_Internalinternal;
} FT_GlyphSlotRec;
/*************************************************************************/
/*************************************************************************/
/* */
/* F U N C T I O N S */
/* */
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/* */
/*
/*FT_Init_FreeType */
/* */
/*
/*Initialize a new FreeType library object.The set of modules*/
/*that are registered by this function is determined at build time.*/
/* */
/*
/*************************************************************************/
/* */
/*
/*FT_Done_FreeType */
/* */
/*
/*Destroy a given FreeType library object and all of its children, */
/*including resources, drivers, faces, sizes, etc. */
/* */
/**/
/*library :: A handle to the target library object.*/
/* */
/*
/*FreeType error code.0~means success. */
/* */
FT_EXPORT( FT_Error )
FT_Done_FreeType( FT_Librarylibrary );
/*************************************************************************/
/* */
/*
/*FT_OPEN_XXX*/
/* */
/*
/*A list of bit field constants used within the `flags’ field of the */
/*@FT_Open_Args structure. */
/* */
/*
/*FT_OPEN_MEMORY :: This is a memory-based stream. */
/* */
/*FT_OPEN_STREAM :: Copy the stream from the `stream’ field. */
/* */
/*FT_OPEN_PATHNAME :: Create a new input stream from a C~path*/
/*name.*/
/* */
/*FT_OPEN_DRIVER :: Use the `driver’ field.*/
/* */
/*FT_OPEN_PARAMS :: Use the `num_params’ and `params’ fields.*/
/* */
/*
/*The `FT_OPEN_MEMORY’, `FT_OPEN_STREAM’, and `FT_OPEN_PATHNAME’ */
/*flags are mutually exclusive.*/
/* */
#define FT_OPEN_MEMORY0x1
#define FT_OPEN_STREAM0x2
#define FT_OPEN_PATHNAME0x4
#define FT_OPEN_DRIVER0x8
#define FT_OPEN_PARAMS0x10
/* these constants are deprecated; use the corresponding `FT_OPEN_XXX’ */
/* values instead*/
#define ft_open_memoryFT_OPEN_MEMORY
#define ft_open_streamFT_OPEN_STREAM
#define ft_open_pathnameFT_OPEN_PATHNAME
#define ft_open_driverFT_OPEN_DRIVER
#define ft_open_paramsFT_OPEN_PARAMS
/*************************************************************************/
/* */
/*
/*FT_Parameter */
/* */
/*
/*A simple structure used to pass more or less generic parameters to */
/*@FT_Open_Face. */
/* */
/*
/*tag:: A four-byte identification tag.*/
/* */
/*data :: A pointer to the parameter data. */
/* */
/*
/*The ID and function of parameters are driver-specific.See the*/
/*various FT_PARAM_TAG_XXX flags for more information. */
/* */
typedef structFT_Parameter_
{
FT_ULongtag;
FT_Pointerdata;
} FT_Parameter;
/*************************************************************************/
/* */
/*
/*FT_Open_Args */
/* */
/*
/*A structure used to indicate how to open a new font file or*/
/*stream.A pointer to such a structure can be used as a parameter*/
/*for the functions @FT_Open_Face and @FT_Attach_Stream. */
/* */
/*
/*flags :: A set of bit flags indicating how to use the*/
/* structure.*/
/* */
/*memory_base :: The first byte of the file in memory. */
/* */
/*memory_size :: The size in bytes of the file in memory.*/
/* */
/*pathname:: A pointer to an 8-bit file pathname.*/
/* */
/*stream:: A handle to a source stream object. */
/* */
/*driver:: This field is exclusively used by @FT_Open_Face;*/
/* it simply specifies the font driver to use to open*/
/* the face.If set to~0, FreeType tries to load the*/
/* face with each one of the drivers in its list.*/
/* */
/*num_params:: The number of extra parameters. */
/* */
/*params:: Extra parameters passed to the font driver when */
/* opening a new face. */
/* */
/*
/*The stream type is determined by the contents of `flags’ that*/
/*are tested in the following order by @FT_Open_Face:*/
/* */
/*If the @FT_OPEN_MEMORY bit is set, assume that this is a */
/*memory file of `memory_size’ bytes, located at `memory_address’. */
/*The data are are not copied, and the client is responsible for */
/*releasing and destroying them _after_ the corresponding call to*/
/*@FT_Done_Face. */
/* */
/*Otherwise, if the @FT_OPEN_STREAM bit is set, assume that a*/
/*custom input stream `stream’ is used.*/
/* */
/*Otherwise, if the @FT_OPEN_PATHNAME bit is set, assume that this */
/*is a normal file and use `pathname’ to open it.*/
/* */
/*If the @FT_OPEN_DRIVER bit is set, @FT_Open_Face only tries to */
/*open the file with the driver whose handler is in `driver’.*/
/* */
/*If the @FT_OPEN_PARAMS bit is set, the parameters given by */
/*`num_params’ and `params’ is used.They are ignored otherwise.*/
/* */
/*Ideally, both the `pathname’ and `params’ fields should be tagged*/
/*as `const’; this is missing for API backwards compatibility.In */
/*other words, applications should treat them as read-only.*/
/* */
typedef structFT_Open_Args_
{
FT_UInt flags;
const FT_Byte*memory_base;
FT_Long memory_size;
FT_String*pathname;
FT_Stream stream;
FT_Module driver;
FT_Intnum_params;
FT_Parameter* params;
} FT_Open_Args;
/*************************************************************************/
/* */
/*
/*FT_New_Face*/
/* */
/*
/*This function calls @FT_Open_Face to open a font by its pathname.*/
/* */
/*
/*library:: A handle to the library resource.*/
/* */
/* */
/*pathname :: A path to the font file. */
/* */
/*face_index :: See @FT_Open_Face for a detailed description of this */
/*parameter. */
/* */
/*
/*************************************************************************/
/* */
/*
/*FT_New_Memory_Face */
/* */
/*
/*This function calls @FT_Open_Face to open a font that has been */
/*loaded into memory.*/
/* */
/*
/*library:: A handle to the library resource.*/
/* */
/* */
/*file_base:: A pointer to the beginning of the font data. */
/* */
/*file_size:: The size of the memory chunk used by the font data.*/
/* */
/*face_index :: See @FT_Open_Face for a detailed description of this */
/*parameter. */
/* */
/*
/*************************************************************************/
/* */
/*
/*FT_Open_Face */
/* */
/*
/*Create a face object from a given resource described by*/
/*@FT_Open_Args. */
/* */
/*
/*library:: A handle to the library resource.*/
/* */
/* */
/*args :: A pointer to an `FT_Open_Args’ structure that must */
/*be filled by the caller. */
/* */
/*face_index :: This field holds two different values.Bits 0-15*/
/*are the index of the face in the font file (starting */
/*with value~0).Set it to~0 if there is only one */
/*face in the font file. */
/* */
/*Bits 16-30 are relevant to GX variation fonts only,*/
/*specifying the named instance index for the current*/
/*face index (starting with value~1; value~0 makes */
/*FreeType ignore named instances).For non-GX fonts, */
/*bits 16-30 are ignored.Assuming that you want to */
/*access the third named instance in face~4, */
/*`face_index’ should be set to 0x00030004.If you*/
/*want to access face~4 without GX variation handling, */
/*simply set `face_index’ to value~4.*/
/* */
/*FT_Open_Face and its siblings can be used to quickly */
/*check whether the font format of a given font*/
/*resource is supported by FreeType.In general, if */
/*the `face_index’ argument is negative, the */
/*function’s return value is~0 if the font format is */
/*recognized, or non-zero otherwise.The function */
/*allocates a more or less empty face handle in*/
/*`*aface’ (if `aface’ isn’t NULL); the only two */
/*useful fields in this special case are */
/*`face->num_faces’ and `face->style_flags’.For any*/
/*negative value of `face_index’, `face->num_faces’*/
/*gives the number of faces within the font file.For */
/*the negative value `-(N+1)’ (with `N’ a 16-bit */
/*value), bits 16-30 in `face->style_flags’ give the */
/*number of named instances in face `N’ if we have a */
/*GX variation font (or zero otherwise).After*/
/*examination, the returned @FT_Face structure should*/
/*be deallocated with a call to @FT_Done_Face. */
/* */
/*
/*************************************************************************/
/* */
/*
/*FT_Attach_Stream */
/* */
/*
/*`Attach’ data to a face object.Normally, this is used to read*/
/*additional information for the face object.For example, you can*/
/*attach an AFM file that comes with a Type~1 font to get the*/
/*kerning values and other metrics.*/
/* */
/*
/*face :: The target face object.*/
/* */
/* */
/*parameters :: A pointer to @FT_Open_Args that must be filled by*/
/*the caller.*/
/* */
/*
/*FreeType error code.0~means success. */
/* */
/*
/*The meaning of the `attach’ (i.e., what really happens when the*/
/*new file is read) is not fixed by FreeType itself.It really*/
/*depends on the font format (and thus the font driver). */
/* */
/*Client applications are expected to know what they are doing */
/*when invoking this function.Most drivers simply do not implement */
/*file attachments.*/
/* */
FT_EXPORT( FT_Error )
FT_Attach_Stream( FT_Faceface,
FT_Open_Args*parameters );
/*************************************************************************/
/* */
/*
/*FT_Reference_Face*/
/* */
/*
/*A counter gets initialized to~1 at the time an @FT_Face structure*/
/*is created.This function increments the counter.@FT_Done_Face*/
/*then only destroys a face if the counter is~1, otherwise it simply */
/*decrements the counter.*/
/* */
/*This function helps in managing life-cycles of structures that */
/*reference @FT_Face objects.*/
/* */
/**/
/*face :: A handle to a target face object.*/
/* */
/*
/*FreeType error code.0~means success. */
/* */
/*
/*2.4.2*/
/* */
FT_EXPORT( FT_Error )
FT_Reference_Face( FT_Faceface );
/*************************************************************************/
/* */
/*
/*FT_Done_Face */
/* */
/*
/*Discard a given face object, as well as all of its child slots and */
/*sizes. */
/* */
/**/
/*face :: A handle to a target face object.*/
/* */
/*
/*FreeType error code.0~means success. */
/* */
/*
/*See the discussion of reference counters in the description of */
/*@FT_Reference_Face.*/
/* */
FT_EXPORT( FT_Error )
FT_Done_Face( FT_Faceface );
/*************************************************************************/
/* */
/*
/*FT_Select_Size */
/* */
/*
/*Select a bitmap strike.*/
/* */
/*
/*face :: A handle to a target face object.*/
/* */
/* */
/*strike_index :: The index of the bitmap strike in the*/
/*`available_sizes’ field of @FT_FaceRec structure.*/
/* */
/*
/*FreeType error code.0~means success. */
/* */
FT_EXPORT( FT_Error )
FT_Select_Size( FT_Faceface,
FT_Int strike_index );
/*************************************************************************/
/* */
/*
/*FT_Size_Request_Type */
/* */
/*
/*An enumeration type that lists the supported size request types. */
/* */
/*
/*FT_SIZE_REQUEST_TYPE_NOMINAL ::*/
/*The nominal size.The `units_per_EM’ field of @FT_FaceRec is*/
/*used to determine both scaling values. */
/* */
/*FT_SIZE_REQUEST_TYPE_REAL_DIM :: */
/*The real dimension.The sum of the the `ascender’ and (minus*/
/*of) the `descender’ fields of @FT_FaceRec are used to determine*/
/*both scaling values. */
/* */
/*FT_SIZE_REQUEST_TYPE_BBOX :: */
/*The font bounding box.The width and height of the `bbox’ field */
/*of @FT_FaceRec are used to determine the horizontal and vertical */
/*scaling value, respectively. */
/* */
/*FT_SIZE_REQUEST_TYPE_CELL :: */
/*The `max_advance_width’ field of @FT_FaceRec is used to*/
/*determine the horizontal scaling value; the vertical scaling */
/*value is determined the same way as*/
/*@FT_SIZE_REQUEST_TYPE_REAL_DIM does.Finally, both scaling*/
/*values are set to the smaller one.This type is useful if you */
/*want to specify the font size for, say, a window of a given*/
/*dimension and 80×24 cells. */
/* */
/*FT_SIZE_REQUEST_TYPE_SCALES :: */
/*Specify the scaling values directly. */
/* */
/*
/*The above descriptions only apply to scalable formats.For bitmap */
/*formats, the behaviour is up to the driver.*/
/* */
/*See the note section of @FT_Size_Metrics if you wonder how size*/
/*requesting relates to scaling values.*/
/* */
typedef enumFT_Size_Request_Type_
{
FT_SIZE_REQUEST_TYPE_NOMINAL,
FT_SIZE_REQUEST_TYPE_REAL_DIM,
FT_SIZE_REQUEST_TYPE_BBOX,
FT_SIZE_REQUEST_TYPE_CELL,
FT_SIZE_REQUEST_TYPE_SCALES,
FT_SIZE_REQUEST_TYPE_MAX
} FT_Size_Request_Type;
/*************************************************************************/
/* */
/*
/*FT_Size_RequestRec */
/* */
/*
/*A structure used to model a size request.*/
/* */
/*
/*type :: See @FT_Size_Request_Type. */
/* */
/*width:: The desired width. */
/* */
/*height :: The desired height.*/
/* */
/*horiResolution :: The horizontal resolution.If set to zero,*/
/*`width’ is treated as a 26.6 fractional pixel*/
/*value. */
/* */
/*vertResolution :: The vertical resolution.If set to zero,*/
/*`height’ is treated as a 26.6 fractional pixel */
/*value. */
/* */
/*
/*If `width’ is zero, then the horizontal scaling value is set equal */
/*to the vertical scaling value, and vice versa. */
/* */
typedef structFT_Size_RequestRec_
{
FT_Size_Request_Typetype;
FT_Long width;
FT_Long height;
FT_UInt horiResolution;
FT_UInt vertResolution;
} FT_Size_RequestRec;
/*************************************************************************/
/* */
/*
/*FT_Size_Request*/
/* */
/*
/*A handle to a size request structure.*/
/* */
typedef struct FT_Size_RequestRec_*FT_Size_Request;
/*************************************************************************/
/* */
/*
/*FT_Request_Size*/
/* */
/*
/*Resize the scale of the active @FT_Size object in a face.*/
/* */
/*
/*face :: A handle to a target face object.*/
/* */
/* */
/*req:: A pointer to a @FT_Size_RequestRec.*/
/* */
/*
/*FreeType error code.0~means success. */
/* */
/*
/*Although drivers may select the bitmap strike matching the */
/*request, you should not rely on this if you intend to select a */
/*particular bitmap strike.Use @FT_Select_Size instead in that */
/*case.*/
/* */
/*The relation between the requested size and the resulting glyph*/
/*size is dependent entirely on how the size is defined in the */
/*source face.The font designer chooses the final size of each */
/*glyph relative to this size.For more information refer to*/
/*`http://www.freetype.org/freetype2/docs/glyphs/glyphs-2.html’*/
/* */
/*Don’t use this function if you are using the FreeType cache API. */
/* */
FT_EXPORT( FT_Error )
FT_Request_Size( FT_Faceface,
FT_Size_Requestreq );
/*************************************************************************/
/* */
/*
/*FT_Set_Char_Size */
/* */
/*
/*This function calls @FT_Request_Size to request the nominal size */
/*(in points). */
/* */
/*
/*face:: A handle to a target face object. */
/* */
/* */
/*char_width:: The nominal width, in 26.6 fractional points. */
/* */
/*char_height :: The nominal height, in 26.6 fractional points.*/
/* */
/*horz_resolution :: The horizontal resolution in dpi. */
/* */
/*vert_resolution :: The vertical resolution in dpi. */
/* */
/*
/*FreeType error code.0~means success. */
/* */
/*
/*If either the character width or height is zero, it is set equal */
/*to the other value.*/
/* */
/*If either the horizontal or vertical resolution is zero, it is set */
/*equal to the other value.*/
/* */
/*A character width or height smaller than 1pt is set to 1pt; if */
/*both resolution values are zero, they are set to 72dpi.*/
/* */
/*Don’t use this function if you are using the FreeType cache API. */
/* */
FT_EXPORT( FT_Error )
FT_Set_Char_Size( FT_Face face,
FT_F26Dot6char_width,
FT_F26Dot6char_height,
FT_UInt horz_resolution,
FT_UInt vert_resolution );
/*************************************************************************/
/* */
/*
/*FT_Set_Pixel_Sizes */
/* */
/*
/*This function calls @FT_Request_Size to request the nominal size */
/*(in pixels). */
/* */
/*
/*face :: A handle to the target face object.*/
/* */
/* */
/*pixel_width:: The nominal width, in pixels.*/
/* */
/*pixel_height :: The nominal height, in pixels. */
/* */
/*
/*FreeType error code.0~means success. */
/* */
/*
/*You should not rely on the resulting glyphs matching, or being */
/*constrained, to this pixel size.Refer to @FT_Request_Size to */
/*understand how requested sizes relate to actual sizes. */
/* */
/*Don’t use this function if you are using the FreeType cache API. */
/* */
FT_EXPORT( FT_Error )
FT_Set_Pixel_Sizes( FT_Faceface,
FT_UIntpixel_width,
FT_UIntpixel_height );
/*************************************************************************/
/* */
/*
/*FT_Load_Glyph*/
/* */
/*
/*A function used to load a single glyph into the glyph slot of a*/
/*face object. */
/* */
/*
/*face:: A handle to the target face object where the glyph*/
/* is loaded.*/
/* */
/* */
/*glyph_index :: The index of the glyph in the font file.For */
/* CID-keyed fonts (either in PS or in CFF format) */
/* this argument specifies the CID value.*/
/* */
/*load_flags:: A flag indicating what to load for this glyph.The */
/* @FT_LOAD_XXX constants can be used to control the */
/* glyph loading process (e.g., whether the outline*/
/* should be scaled, whether to load bitmaps or not, */
/* whether to hint the outline, etc).*/
/* */
/*
/*FreeType error code.0~means success. */
/* */
/*
/*The loaded glyph may be transformed.See @FT_Set_Transform for*/
/*the details. */
/* */
/*For subsetted CID-keyed fonts, `FT_Err_Invalid_Argument’ is*/
/*returned for invalid CID values (this is, for CID values that*/
/*don’t have a corresponding glyph in the font).See the discussion */
/*of the @FT_FACE_FLAG_CID_KEYED flag for more details.*/
/* */
FT_EXPORT( FT_Error )
FT_Load_Glyph( FT_Face face,
FT_UInt glyph_index,
FT_Int32load_flags );
/*************************************************************************/
/* */
/*
/*FT_Load_Char */
/* */
/*
/*A function used to load a single glyph into the glyph slot of a*/
/*face object, according to its character code.*/
/* */
/*
/*face:: A handle to a target face object where the glyph*/
/* is loaded.*/
/* */
/* */
/*char_code :: The glyph’s character code, according to the*/
/* current charmap used in the face. */
/* */
/*load_flags:: A flag indicating what to load for this glyph.The */
/* @FT_LOAD_XXX constants can be used to control the */
/* glyph loading process (e.g., whether the outline*/
/* should be scaled, whether to load bitmaps or not, */
/* whether to hint the outline, etc).*/
/* */
/*
/*FreeType error code.0~means success. */
/* */
/*
/*This function simply calls @FT_Get_Char_Index and @FT_Load_Glyph.*/
/* */
FT_EXPORT( FT_Error )
FT_Load_Char( FT_Face face,
FT_ULongchar_code,
FT_Int32load_flags );
/*************************************************************************
*
* @enum:
* FT_LOAD_XXX
*
* @description:
* A list of bit field constants used with @FT_Load_Glyph to indicate
* what kind of operations to perform during glyph loading.
*
* @values:
* FT_LOAD_DEFAULT ::
* Corresponding to~0, this value is used as the default glyph load
* operation.In this case, the following happens:
*
* 1. FreeType looks for a bitmap for the glyph corresponding to the
*face’s current size.If one is found, the function returns.
*The bitmap data can be accessed from the glyph slot (see note
*below).
*
* 2. If no embedded bitmap is searched or found, FreeType looks for a
*scalable outline.If one is found, it is loaded from the font
*file, scaled to device pixels, then `hinted’ to the pixel grid
*in order to optimize it.The outline data can be accessed from
*the glyph slot (see note below).
*
* Note that by default, the glyph loader doesn’t render outlines into
* bitmaps.The following flags are used to modify this default
* behaviour to more specific and useful cases.
*
* FT_LOAD_NO_SCALE ::
* Don’t scale the loaded outline glyph but keep it in font units.
*
* This flag implies @FT_LOAD_NO_HINTING and @FT_LOAD_NO_BITMAP, and
* unsets @FT_LOAD_RENDER.
*
* If the font is `tricky’ (see @FT_FACE_FLAG_TRICKY for more), using
* FT_LOAD_NO_SCALE usually yields meaningless outlines because the
* subglyphs must be scaled and positioned with hinting instructions.
* This can be solved by loading the font without FT_LOAD_NO_SCALE and
* setting the character size to `font->units_per_EM’.
*
* FT_LOAD_NO_HINTING ::
* Disable hinting.This generally generates `blurrier’ bitmap glyphs
* when the glyph are rendered in any of the anti-aliased modes.See
* also the note below.
*
* This flag is implied by @FT_LOAD_NO_SCALE.
*
* FT_LOAD_RENDER ::
* Call @FT_Render_Glyph after the glyph is loaded.By default, the
* glyph is rendered in @FT_RENDER_MODE_NORMAL mode.This can be
* overridden by @FT_LOAD_TARGET_XXX or @FT_LOAD_MONOCHROME.
*
* This flag is unset by @FT_LOAD_NO_SCALE.
*
* FT_LOAD_NO_BITMAP ::
* Ignore bitmap strikes when loading.Bitmap-only fonts ignore this
* flag.
*
* @FT_LOAD_NO_SCALE always sets this flag.
*
* FT_LOAD_VERTICAL_LAYOUT ::
* Load the glyph for vertical text layout.In particular, the
* `advance’ value in the @FT_GlyphSlotRec structure is set to the
* `vertAdvance’ value of the `metrics’ field.
*
* In case @FT_HAS_VERTICAL doesn’t return true, you shouldn’t use
* this flag currently.Reason is that in this case vertical metrics
* get synthesized, and those values are not always consistent across
* various font formats.
*
* FT_LOAD_FORCE_AUTOHINT ::
* Indicates that the auto-hinter is preferred over the font’s native
* hinter.See also the note below.
*
* FT_LOAD_PEDANTIC ::
* Indicates that the font driver should perform pedantic verifications
* during glyph loading.This is mostly used to detect broken glyphs
* in fonts.By default, FreeType tries to handle broken fonts also.
*
* In particular, errors from the TrueType bytecode engine are not
* passed to the application if this flag is not set; this might
* result in partially hinted or distorted glyphs in case a glyph’s
* bytecode is buggy.
*
* FT_LOAD_NO_RECURSE ::
* Indicate that the font driver should not load composite glyphs
* recursively.Instead, it should set the `num_subglyph’ and
* `subglyphs’ values of the glyph slot accordingly, and set
* `glyph->format’ to @FT_GLYPH_FORMAT_COMPOSITE.The description of
* subglyphs can then be accessed with @FT_Get_SubGlyph_Info.
*
* This flag implies @FT_LOAD_NO_SCALE and @FT_LOAD_IGNORE_TRANSFORM.
*
* FT_LOAD_IGNORE_TRANSFORM ::
* Indicates that the transform matrix set by @FT_Set_Transform should
* be ignored.
*
* FT_LOAD_MONOCHROME ::
* This flag is used with @FT_LOAD_RENDER to indicate that you want to
* render an outline glyph to a 1-bit monochrome bitmap glyph, with
* 8~pixels packed into each byte of the bitmap data.
*
* Note that this has no effect on the hinting algorithm used.You
* should rather use @FT_LOAD_TARGET_MONO so that the
* monochrome-optimized hinting algorithm is used.
*
* FT_LOAD_LINEAR_DESIGN ::
* Indicates that the `linearHoriAdvance’ and `linearVertAdvance’
* fields of @FT_GlyphSlotRec should be kept in font units.See
* @FT_GlyphSlotRec for details.
*
* FT_LOAD_NO_AUTOHINT ::
* Disable auto-hinter.See also the note below.
*
* FT_LOAD_COLOR ::
* This flag is used to request loading of color embedded-bitmap
* images.The resulting color bitmaps, if available, will have the
* @FT_PIXEL_MODE_BGRA format.When the flag is not used and color
* bitmaps are found, they will be converted to 256-level gray
* bitmaps transparently.Those bitmaps will be in the
* @FT_PIXEL_MODE_GRAY format.
*
* FT_LOAD_COMPUTE_METRICS ::
* This flag sets computing glyph metrics without the use of bundled
* metrics tables (for example, the `hdmx’ table in TrueType fonts).
* Well-behaving fonts have optimized bundled metrics and these should
* be used.This flag is mainly used by font validating or font
* editing applications, which need to ignore, verify, or edit those
* tables.
*
* Currently, this flag is only implemented for TrueType fonts.
*
* FT_LOAD_CROP_BITMAP ::
* Ignored.Deprecated.
*
* FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH ::
* Ignored.Deprecated.
*
* @note:
* By default, hinting is enabled and the font’s native hinter (see
* @FT_FACE_FLAG_HINTER) is preferred over the auto-hinter.You can
* disable hinting by setting @FT_LOAD_NO_HINTING or change the
* precedence by setting @FT_LOAD_FORCE_AUTOHINT.You can also set
* @FT_LOAD_NO_AUTOHINT in case you don’t want the auto-hinter to be
* used at all.
*
* See the description of @FT_FACE_FLAG_TRICKY for a special exception
* (affecting only a handful of Asian fonts).
*
* Besides deciding which hinter to use, you can also decide which
* hinting algorithm to use.See @FT_LOAD_TARGET_XXX for details.
*
* Note that the auto-hinter needs a valid Unicode cmap (either a native
* one or synthesized by FreeType) for producing correct results.If a
* font provides an incorrect mapping (for example, assigning the
* character code U+005A, LATIN CAPITAL LETTER Z, to a glyph depicting a
* mathematical integral sign), the auto-hinter might produce useless
* results.
*
*/
#define FT_LOAD_DEFAULT0x0
#define FT_LOAD_NO_SCALE ( 1L << 0 )#define FT_LOAD_NO_HINTING ( 1L << 1 )#define FT_LOAD_RENDER ( 1L << 2 )#define FT_LOAD_NO_BITMAP( 1L << 3 )#define FT_LOAD_VERTICAL_LAYOUT( 1L << 4 )#define FT_LOAD_FORCE_AUTOHINT ( 1L << 5 )#define FT_LOAD_CROP_BITMAP( 1L << 6 )#define FT_LOAD_PEDANTIC ( 1L << 7 )#define FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH( 1L << 9 )#define FT_LOAD_NO_RECURSE ( 1L << 10 )#define FT_LOAD_IGNORE_TRANSFORM ( 1L << 11 )#define FT_LOAD_MONOCHROME ( 1L << 12 )#define FT_LOAD_LINEAR_DESIGN( 1L << 13 )#define FT_LOAD_NO_AUTOHINT( 1L << 15 )/* Bits 16..19 are used by `FT_LOAD_TARGET_’ */#define FT_LOAD_COLOR( 1L << 20 )#define FT_LOAD_COMPUTE_METRICS( 1L << 21 )/* *//* used internally only by certain font drivers! */#define FT_LOAD_ADVANCE_ONLY ( 1L << 8 )#define FT_LOAD_SBITS_ONLY ( 1L << 14 )/************************************************************************** * * @enum: * FT_LOAD_TARGET_XXX * * @description: * A list of values that are used to select a specific hinting algorithm * to use by the hinter.You should OR one of these values to your * `load_flags’ when calling @FT_Load_Glyph. * * Note that font’s native hinters may ignore the hinting algorithm you * have specified (e.g., the TrueType bytecode interpreter).You can set * @FT_LOAD_FORCE_AUTOHINT to ensure that the auto-hinter is used. * * Also note that @FT_LOAD_TARGET_LIGHT is an exception, in that it * always implies @FT_LOAD_FORCE_AUTOHINT. * * @values: * FT_LOAD_TARGET_NORMAL :: * This corresponds to the default hinting algorithm, optimized for * standard gray-level rendering.For monochrome output, use * @FT_LOAD_TARGET_MONO instead. * * FT_LOAD_TARGET_LIGHT :: * A lighter hinting algorithm for non-monochrome modes.Many * generated glyphs are more fuzzy but better resemble its original * shape.A bit like rendering on Mac OS~X. * * As a special exception, this target implies @FT_LOAD_FORCE_AUTOHINT. * * FT_LOAD_TARGET_MONO :: * Strong hinting algorithm that should only be used for monochrome * output.The result is probably unpleasant if the glyph is rendered * in non-monochrome modes. * * FT_LOAD_TARGET_LCD :: * A variant of @FT_LOAD_TARGET_NORMAL optimized for horizontally * decimated LCD displays. * * FT_LOAD_TARGET_LCD_V :: * A variant of @FT_LOAD_TARGET_NORMAL optimized for vertically * decimated LCD displays. * * @note: * You should use only _one_ of the FT_LOAD_TARGET_XXX values in your * `load_flags’.They can’t be ORed. * * If @FT_LOAD_RENDER is also set, the glyph is rendered in the * corresponding mode (i.e., the mode that matches the used algorithm * best).An exeption is FT_LOAD_TARGET_MONO since it implies * @FT_LOAD_MONOCHROME. * * You can use a hinting algorithm that doesn’t correspond to the same * rendering mode.As an example, it is possible to use the `light’ * hinting algorithm and have the results rendered in horizontal LCD * pixel mode, with code like * * { * FT_Load_Glyph( face, glyph_index, *load_flags | FT_LOAD_TARGET_LIGHT ); * * FT_Render_Glyph( face->glyph, FT_RENDER_MODE_LCD );
* }
*
*/
#define FT_LOAD_TARGET_( x ) ( (FT_Int32)( (x) & 15 ) << 16 )#define FT_LOAD_TARGET_NORMALFT_LOAD_TARGET_( FT_RENDER_MODE_NORMAL )#define FT_LOAD_TARGET_LIGHT FT_LOAD_TARGET_( FT_RENDER_MODE_LIGHT)#define FT_LOAD_TARGET_MONOFT_LOAD_TARGET_( FT_RENDER_MODE_MONO )#define FT_LOAD_TARGET_LCD FT_LOAD_TARGET_( FT_RENDER_MODE_LCD)#define FT_LOAD_TARGET_LCD_V FT_LOAD_TARGET_( FT_RENDER_MODE_LCD_V)/************************************************************************** * * @macro: * FT_LOAD_TARGET_MODE * * @description: * Return the @FT_Render_Mode corresponding to a given * @FT_LOAD_TARGET_XXX value. * */#define FT_LOAD_TARGET_MODE( x )( (FT_Render_Mode)( ( (x) >> 16 ) & 15 ) )
/*************************************************************************/
/* */
/*
/*FT_Set_Transform */
/* */
/*
/*A function used to set the transformation that is applied to glyph */
/*images when they are loaded into a glyph slot through*/
/*@FT_Load_Glyph.*/
/* */
/*
/*face :: A handle to the source face object.*/
/* */
/* */
/*matrix :: A pointer to the transformation’s 2×2 matrix.Use~0 for */
/*the identity matrix. */
/*delta:: A pointer to the translation vector.Use~0 for the null */
/*vector.*/
/* */
/*
/*The transformation is only applied to scalable image formats after */
/*the glyph has been loaded.It means that hinting is unaltered by*/
/*the transformation and is performed on the character size given in */
/*the last call to @FT_Set_Char_Size or @FT_Set_Pixel_Sizes. */
/* */
/*Note that this also transforms the `face.glyph.advance’ field, but */
/**not* the values in `face.glyph.metrics’.*/
/* */
FT_EXPORT( void )
FT_Set_Transform( FT_Face face,
FT_Matrix*matrix,
FT_Vector*delta );
/*************************************************************************/
/* */
/*
/*FT_Render_Mode */
/* */
/*
/*An enumeration type that lists the render modes supported by */
/*FreeType~2.Each mode corresponds to a specific type of scanline*/
/*conversion performed on the outline. */
/* */
/*For bitmap fonts and embedded bitmaps the `bitmap->pixel_mode’ */
/*field in the @FT_GlyphSlotRec structure gives the format of the*/
/*returned bitmap. */
/* */
/*All modes except @FT_RENDER_MODE_MONO use 256 levels of opacity. */
/* */
/*
/*FT_RENDER_MODE_NORMAL :: */
/*This is the default render mode; it corresponds to 8-bit */
/*anti-aliased bitmaps.*/
/* */
/*FT_RENDER_MODE_LIGHT ::*/
/*This is equivalent to @FT_RENDER_MODE_NORMAL.It is only*/
/*defined as a separate value because render modes are also used */
/*indirectly to define hinting algorithm selectors.See */
/*@FT_LOAD_TARGET_XXX for details. */
/* */
/*FT_RENDER_MODE_MONO :: */
/*This mode corresponds to 1-bit bitmaps (with 2~levels of */
/*opacity).*/
/* */
/*FT_RENDER_MODE_LCD ::*/
/*This mode corresponds to horizontal RGB and BGR sub-pixel*/
/*displays like LCD screens.It produces 8-bit bitmaps that are */
/*3~times the width of the original glyph outline in pixels, and */
/*which use the @FT_PIXEL_MODE_LCD mode. */
/* */
/*FT_RENDER_MODE_LCD_V ::*/
/*This mode corresponds to vertical RGB and BGR sub-pixel displays */
/*(like PDA screens, rotated LCD displays, etc.).It produces */
/*8-bit bitmaps that are 3~times the height of the original*/
/*glyph outline in pixels and use the @FT_PIXEL_MODE_LCD_V mode. */
/* */
/*
/*The LCD-optimized glyph bitmaps produced by FT_Render_Glyph can be */
/*filtered to reduce color-fringes by using @FT_Library_SetLcdFilter */
/*(not active in the default builds).It is up to the caller to */
/*either call @FT_Library_SetLcdFilter (if available) or do the*/
/*filtering itself.*/
/* */
/*The selected render mode only affects vector glyphs of a font. */
/*Embedded bitmaps often have a different pixel mode like*/
/*@FT_PIXEL_MODE_MONO.You can use @FT_Bitmap_Convert to transform*/
/*them into 8-bit pixmaps. */
/* */
typedef enumFT_Render_Mode_
{
FT_RENDER_MODE_NORMAL = 0,
FT_RENDER_MODE_LIGHT,
FT_RENDER_MODE_MONO,
FT_RENDER_MODE_LCD,
FT_RENDER_MODE_LCD_V,
FT_RENDER_MODE_MAX
} FT_Render_Mode;
/* these constants are deprecated; use the corresponding */
/* `FT_Render_Mode’ values instead */
#define ft_render_mode_normalFT_RENDER_MODE_NORMAL
#define ft_render_mode_monoFT_RENDER_MODE_MONO
/*************************************************************************/
/* */
/*
/*FT_Render_Glyph*/
/* */
/*
/*Convert a given glyph image to a bitmap.It does so by inspecting */
/*the glyph image format, finding the relevant renderer, and */
/*invoking it. */
/* */
/*
/*slot:: A handle to the glyph slot containing the image to*/
/* convert.*/
/* */
/* */
/*render_mode :: This is the render mode used to render the glyph*/
/* image into a bitmap.See @FT_Render_Mode for a */
/* list of possible values.*/
/* */
/*
/*FreeType error code.0~means success. */
/* */
/*
/*To get meaningful results, font scaling values must be set with*/
/*functions like @FT_Set_Char_Size before calling FT_Render_Glyph. */
/* */
FT_EXPORT( FT_Error )
FT_Render_Glyph( FT_GlyphSlotslot,
FT_Render_Moderender_mode );
/*************************************************************************/
/* */
/*
/*FT_Kerning_Mode*/
/* */
/*
/*An enumeration used to specify which kerning values to return in */
/*@FT_Get_Kerning. */
/* */
/*
/*FT_KERNING_DEFAULT:: Return grid-fitted kerning distances in */
/* pixels (value is~0).Whether they are*/
/* scaled depends on @FT_LOAD_NO_SCALE.*/
/* */
/*FT_KERNING_UNFITTED :: Return un-grid-fitted kerning distances in*/
/* 26.6 fractional pixels.Whether they are */
/* scaled depends on @FT_LOAD_NO_SCALE.*/
/* */
/*FT_KERNING_UNSCALED :: Return the kerning vector in original font*/
/* units.*/
/* */
/*
/*FT_KERNING_DEFAULT returns full pixel values; it also makes*/
/*FreeType heuristically scale down kerning distances at small ppem*/
/*values so that they don’t become too big.*/
/* */
typedef enumFT_Kerning_Mode_
{
FT_KERNING_DEFAULT= 0,
FT_KERNING_UNFITTED,
FT_KERNING_UNSCALED
} FT_Kerning_Mode;
/* these constants are deprecated; use the corresponding */
/* `FT_Kerning_Mode’ values instead*/
#define ft_kerning_default FT_KERNING_DEFAULT
#define ft_kerning_unfittedFT_KERNING_UNFITTED
#define ft_kerning_unscaledFT_KERNING_UNSCALED
/*************************************************************************/
/* */
/*
/*FT_Get_Kerning */
/* */
/*
/*Return the kerning vector between two glyphs of a same face. */
/* */
/**/
/*face:: A handle to a source face object. */
/* */
/*left_glyph:: The index of the left glyph in the kern pair. */
/* */
/*right_glyph :: The index of the right glyph in the kern pair.*/
/* */
/*kern_mode :: See @FT_Kerning_Mode for more information.*/
/* Determines the scale and dimension of the returned*/
/* kerning vector. */
/* */
/*
/*************************************************************************/
/* */
/*
/*FT_Get_Track_Kerning */
/* */
/*
/*Return the track kerning for a given face object at a given size.*/
/* */
/**/
/*face :: A handle to a source face object.*/
/* */
/*point_size :: The point size in 16.16 fractional points. */
/* */
/*degree :: The degree of tightness.Increasingly negative*/
/*values represent tighter track kerning, while*/
/*increasingly positive values represent looser track*/
/*kerning.Value zero means no track kerning. */
/* */
/*
/*************************************************************************/
/* */
/*
/*FT_Get_Glyph_Name*/
/* */
/*
/*Retrieve the ASCII name of a given glyph in a face.This only */
/*works for those faces where @FT_HAS_GLYPH_NAMES(face) returns~1. */
/* */
/**/
/*face:: A handle to a source face object. */
/* */
/*glyph_index :: The glyph index.*/
/* */
/*buffer_max:: The maximum number of bytes available in the*/
/* buffer. */
/* */
/*
/*************************************************************************/
/* */
/*
/*FT_Get_Postscript_Name */
/* */
/*
/*Retrieve the ASCII PostScript name of a given face, if available.*/
/*This only works with PostScript and TrueType fonts.*/
/* */
/**/
/*face :: A handle to the source face object.*/
/* */
/*
/*A pointer to the face’s PostScript name.NULL if unavailable. */
/* */
/*
/*The returned pointer is owned by the face and is destroyed with*/
/*it.*/
/* */
FT_EXPORT( const char* )
FT_Get_Postscript_Name( FT_Faceface );
/*************************************************************************/
/* */
/*
/*FT_Select_Charmap*/
/* */
/*
/*Select a given charmap by its encoding tag (as listed in */
/*`freetype.h’). */
/* */
/*
/*face :: A handle to the source face object.*/
/* */
/* */
/*encoding :: A handle to the selected encoding. */
/* */
/*
/*FreeType error code.0~means success. */
/* */
/*
/*This function returns an error if no charmap in the face */
/*corresponds to the encoding queried here.*/
/* */
/*Because many fonts contain more than a single cmap for Unicode */
/*encoding, this function has some special code to select the one*/
/*that covers Unicode best (`best’ in the sense that a UCS-4 cmap is */
/*preferred to a UCS-2 cmap).It is thus preferable to*/
/*@FT_Set_Charmap in this case.*/
/* */
FT_EXPORT( FT_Error )
FT_Select_Charmap( FT_Faceface,
FT_Encodingencoding );
/*************************************************************************/
/* */
/*
/*FT_Set_Charmap */
/* */
/*
/*Select a given charmap for character code to glyph index mapping.*/
/* */
/*
/*face:: A handle to the source face object. */
/* */
/* */
/*charmap :: A handle to the selected charmap. */
/* */
/*
/*FreeType error code.0~means success. */
/* */
/*
/*This function returns an error if the charmap is not part of */
/*the face (i.e., if it is not listed in the `face->charmaps’*/
/*table).*/
/* */
/*It also fails if a type~14 charmap is selected.*/
/* */
FT_EXPORT( FT_Error )
FT_Set_Charmap( FT_Face face,
FT_CharMapcharmap );
/*************************************************************************
*
* @function:
* FT_Get_Charmap_Index
*
* @description:
* Retrieve index of a given charmap.
*
* @input:
* charmap ::
* A handle to a charmap.
*
* @return:
* The index into the array of character maps within the face to which
* `charmap’ belongs.If an error occurs, -1 is returned.
*
*/
FT_EXPORT( FT_Int )
FT_Get_Charmap_Index( FT_CharMapcharmap );
/*************************************************************************/
/* */
/*
/*FT_Get_Char_Index*/
/* */
/*
/*Return the glyph index of a given character code.This function */
/*uses a charmap object to do the mapping. */
/* */
/**/
/*face :: A handle to the source face object.*/
/* */
/*charcode :: The character code.*/
/* */
/*
/*The glyph index.0~means `undefined character code’.*/
/* */
/*
/*If you use FreeType to manipulate the contents of font files */
/*directly, be aware that the glyph index returned by this function*/
/*doesn’t always correspond to the internal indices used within the*/
/*file.This is done to ensure that value~0 always corresponds to */
/*the `missing glyph’.If the first glyph is not named `.notdef’, */
/*then for Type~1 and Type~42 fonts, `.notdef’ will be moved into*/
/*the glyph ID~0 position, and whatever was there will be moved to */
/*the position `.notdef’ had.For Type~1 fonts, if there is no*/
/*`.notdef’ glyph at all, then one will be created at index~0 and*/
/*whatever was there will be moved to the last index — Type~42*/
/*fonts are considered invalid under this condition. */
/* */
FT_EXPORT( FT_UInt )
FT_Get_Char_Index( FT_Face face,
FT_ULongcharcode );
/*************************************************************************/
/* */
/*
/*FT_Get_First_Char*/
/* */
/*
/*This function is used to return the first character code in the*/
/*current charmap of a given face.It also returns the*/
/*corresponding glyph index. */
/* */
/**/
/*face:: A handle to the source face object. */
/* */
/*
/*************************************************************************/
/* */
/*
/*FT_Get_Next_Char */
/* */
/*
/*This function is used to return the next character code in the */
/*current charmap of a given face following the value `char_code’, */
/*as well as the corresponding glyph index.*/
/* */
/**/
/*face:: A handle to the source face object. */
/*char_code :: The starting character code.*/
/* */
/*
/*************************************************************************/
/* */
/*
/*FT_Get_Name_Index*/
/* */
/*
/*Return the glyph index of a given glyph name.This function uses*/
/*driver specific objects to do the translation. */
/* */
/**/
/*face :: A handle to the source face object.*/
/* */
/*glyph_name :: The glyph name.*/
/* */
/*
/*The glyph index.0~means `undefined character code’.*/
/* */
FT_EXPORT( FT_UInt )
FT_Get_Name_Index( FT_Face face,
FT_String*glyph_name );
/*************************************************************************
*
* @macro:
* FT_SUBGLYPH_FLAG_XXX
*
* @description:
* A list of constants used to describe subglyphs.Please refer to the
* TrueType specification for the meaning of the various flags.
*
* @values:
* FT_SUBGLYPH_FLAG_ARGS_ARE_WORDS ::
* FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES ::
* FT_SUBGLYPH_FLAG_ROUND_XY_TO_GRID ::
* FT_SUBGLYPH_FLAG_SCALE ::
* FT_SUBGLYPH_FLAG_XY_SCALE ::
* FT_SUBGLYPH_FLAG_2X2 ::
* FT_SUBGLYPH_FLAG_USE_MY_METRICS ::
*
*/
#define FT_SUBGLYPH_FLAG_ARGS_ARE_WORDS1
#define FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES2
#define FT_SUBGLYPH_FLAG_ROUND_XY_TO_GRID4
#define FT_SUBGLYPH_FLAG_SCALE 8
#define FT_SUBGLYPH_FLAG_XY_SCALE 0x40
#define FT_SUBGLYPH_FLAG_2X20x80
#define FT_SUBGLYPH_FLAG_USE_MY_METRICS0x200
/*************************************************************************
*
* @func:
* FT_Get_SubGlyph_Info
*
* @description:
* Retrieve a description of a given subglyph.Only use it if
* `glyph->format’ is @FT_GLYPH_FORMAT_COMPOSITE; an error is
* returned otherwise.
*
* @input:
* glyph ::
* The source glyph slot.
*
* sub_index ::
* The index of the subglyph.Must be less than
* `glyph->num_subglyphs’.
*
* @output:
* p_index ::
* The glyph index of the subglyph.
*
* p_flags ::
* The subglyph flags, see @FT_SUBGLYPH_FLAG_XXX.
*
* p_arg1 ::
* The subglyph’s first argument (if any).
*
* p_arg2 ::
* The subglyph’s second argument (if any).
*
* p_transform ::
* The subglyph transformation (if any).
*
* @return:
* FreeType error code.0~means success.
*
* @note:
* The values of `*p_arg1′, `*p_arg2′, and `*p_transform’ must be
* interpreted depending on the flags returned in `*p_flags’.See the
* TrueType specification for details.
*
*/
FT_EXPORT( FT_Error )
FT_Get_SubGlyph_Info( FT_GlyphSlotglyph,
FT_UInt sub_index,
FT_Int *p_index,
FT_UInt*p_flags,
FT_Int *p_arg1,
FT_Int *p_arg2,
FT_Matrix*p_transform );
/*************************************************************************/
/* */
/*
/*FT_FSTYPE_XXX*/
/* */
/*
/*A list of bit flags used in the `fsType’ field of the OS/2 table */
/*in a TrueType or OpenType font and the `FSType’ entry in a */
/*PostScript font.These bit flags are returned by*/
/*@FT_Get_FSType_Flags; they inform client applications of embedding */
/*and subsetting restrictions associated with a font.*/
/* */
/*See*/
/*http://www.adobe.com/content/dam/Adobe/en/devnet/acrobat/pdfs/FontPolicies.pdf */
/*for more details.*/
/* */
/*
/*FT_FSTYPE_INSTALLABLE_EMBEDDING :: */
/*Fonts with no fsType bit set may be embedded and permanently */
/*installed on the remote system by an application.*/
/* */
/*FT_FSTYPE_RESTRICTED_LICENSE_EMBEDDING ::*/
/*Fonts that have only this bit set must not be modified, embedded */
/*or exchanged in any manner without first obtaining permission of */
/*the font software copyright owner. */
/* */
/*FT_FSTYPE_PREVIEW_AND_PRINT_EMBEDDING :: */
/*If this bit is set, the font may be embedded and temporarily */
/*loaded on the remote system.Documents containing Preview & */
/*Print fonts must be opened `read-only’; no edits can be applied*/
/*to the document. */
/* */
/*FT_FSTYPE_EDITABLE_EMBEDDING ::*/
/*If this bit is set, the font may be embedded but must only be*/
/*installed temporarily on other systems.In contrast to Preview*/
/*& Print fonts, documents containing editable fonts may be opened */
/*for reading, editing is permitted, and changes may be saved. */
/* */
/*FT_FSTYPE_NO_SUBSETTING :: */
/*If this bit is set, the font may not be subsetted prior to */
/*embedding. */
/* */
/*FT_FSTYPE_BITMAP_EMBEDDING_ONLY :: */
/*If this bit is set, only bitmaps contained in the font may be*/
/*embedded; no outline data may be embedded.If there are no*/
/*bitmaps available in the font, then the font is unembeddable.*/
/* */
/*
/*The flags are ORed together, thus more than a single value can be*/
/*returned.*/
/* */
/*While the fsType flags can indicate that a font may be embedded, a */
/*license with the font vendor may be separately required to use the */
/*font in this way.*/
/* */
#define FT_FSTYPE_INSTALLABLE_EMBEDDING 0x0000
#define FT_FSTYPE_RESTRICTED_LICENSE_EMBEDDING0x0002
#define FT_FSTYPE_PREVIEW_AND_PRINT_EMBEDDING 0x0004
#define FT_FSTYPE_EDITABLE_EMBEDDING0x0008
#define FT_FSTYPE_NO_SUBSETTING 0x0100
#define FT_FSTYPE_BITMAP_EMBEDDING_ONLY 0x0200
/*************************************************************************/
/* */
/*
/*FT_Get_FSType_Flags*/
/* */
/*
/*Return the fsType flags for a font.*/
/* */
/**/
/*face :: A handle to the source face object.*/
/* */
/*
/*The fsType flags, @FT_FSTYPE_XXX.*/
/* */
/*
/*Use this function rather than directly reading the `fs_type’ field */
/*in the @PS_FontInfoRec structure, which is only guaranteed to*/
/*return the correct results for Type~1 fonts. */
/* */
/*
/*2.3.8*/
/* */
FT_EXPORT( FT_UShort )
FT_Get_FSType_Flags( FT_Faceface );
/*************************************************************************/
/* */
/*
/*glyph_variants */
/* */
/*
/*************************************************************************/
/* */
/*
/*FT_Face_GetCharVariantIndex*/
/* */
/*
/*Return the glyph index of a given character code as modified by*/
/*the variation selector.*/
/* */
/**/
/*face ::*/
/*A handle to the source face object.*/
/* */
/*charcode ::*/
/*The character code point in Unicode. */
/* */
/*variantSelector :: */
/*The Unicode code point of the variation selector.*/
/* */
/*
/*The glyph index.0~means either `undefined character code’, or*/
/*`undefined selector code’, or `no variation selector cmap*/
/*subtable’, or `current CharMap is not Unicode’.*/
/* */
/*
/*If you use FreeType to manipulate the contents of font files */
/*directly, be aware that the glyph index returned by this function*/
/*doesn’t always correspond to the internal indices used within*/
/*the file.This is done to ensure that value~0 always corresponds*/
/*to the `missing glyph’.*/
/* */
/*This function is only meaningful if*/
/*a) the font has a variation selector cmap sub table, */
/*and*/
/*b) the current charmap has a Unicode encoding. */
/* */
/*
/*2.3.6*/
/* */
FT_EXPORT( FT_UInt )
FT_Face_GetCharVariantIndex( FT_Face face,
FT_ULongcharcode,
FT_ULongvariantSelector );
/*************************************************************************/
/* */
/*
/*FT_Face_GetCharVariantIsDefault*/
/* */
/*
/*Check whether this variant of this Unicode character is the one to */
/*be found in the `cmap’.*/
/* */
/**/
/*face ::*/
/*A handle to the source face object.*/
/* */
/*charcode ::*/
/*The character codepoint in Unicode.*/
/* */
/*variantSelector :: */
/*The Unicode codepoint of the variation selector. */
/* */
/*
/*1~if found in the standard (Unicode) cmap, 0~if found in the */
/*variation selector cmap, or -1 if it is not a variant. */
/* */
/*
/*This function is only meaningful if the font has a variation */
/*selector cmap subtable.*/
/* */
/*
/*2.3.6*/
/* */
FT_EXPORT( FT_Int )
FT_Face_GetCharVariantIsDefault( FT_Face face,
FT_ULongcharcode,
FT_ULongvariantSelector );
/*************************************************************************/
/* */
/*
/*FT_Face_GetVariantSelectors*/
/* */
/*
/*Return a zero-terminated list of Unicode variant selectors found */
/*in the font. */
/* */
/**/
/*face ::*/
/*A handle to the source face object.*/
/* */
/*
/*A pointer to an array of selector code points, or NULL if there is */
/*no valid variant selector cmap subtable. */
/* */
/*
/*The last item in the array is~0; the array is owned by the */
/*@FT_Face object but can be overwritten or released on the next */
/*call to a FreeType function. */
/* */
/*
/*2.3.6*/
/* */
FT_EXPORT( FT_UInt32* )
FT_Face_GetVariantSelectors( FT_Faceface );
/*************************************************************************/
/* */
/*
/*FT_Face_GetVariantsOfChar*/
/* */
/*
/*Return a zero-terminated list of Unicode variant selectors found */
/*for the specified character code.*/
/* */
/**/
/*face ::*/
/*A handle to the source face object.*/
/* */
/*charcode ::*/
/*The character codepoint in Unicode.*/
/* */
/*
/*A pointer to an array of variant selector code points that are */
/*active for the given character, or NULL if the corresponding list*/
/*is empty.*/
/* */
/*
/*The last item in the array is~0; the array is owned by the */
/*@FT_Face object but can be overwritten or released on the next */
/*call to a FreeType function. */
/* */
/*
/*2.3.6*/
/* */
FT_EXPORT( FT_UInt32* )
FT_Face_GetVariantsOfChar( FT_Face face,
FT_ULongcharcode );
/*************************************************************************/
/* */
/*
/*FT_Face_GetCharsOfVariant*/
/* */
/*
/*Return a zero-terminated list of Unicode character codes found for */
/*the specified variant selector.*/
/* */
/**/
/*face ::*/
/*A handle to the source face object.*/
/* */
/*variantSelector :: */
/*The variant selector code point in Unicode.*/
/* */
/*
/*A list of all the code points that are specified by this selector*/
/*(both default and non-default codes are returned) or NULL if there */
/*is no valid cmap or the variant selector is invalid. */
/* */
/*
/*The last item in the array is~0; the array is owned by the */
/*@FT_Face object but can be overwritten or released on the next */
/*call to a FreeType function. */
/* */
/*
/*2.3.6*/
/* */
FT_EXPORT( FT_UInt32* )
FT_Face_GetCharsOfVariant( FT_Face face,
FT_ULongvariantSelector );
/*************************************************************************/
/* */
/*
/*computations */
/* */
/*
/*************************************************************************/
/* */
/*
/*FT_MulDiv*/
/* */
/*
/*A very simple function used to perform the computation `(a*b)/c’ */
/*with maximum accuracy (it uses a 64-bit intermediate integer */
/*whenever necessary). */
/* */
/*This function isn’t necessarily as fast as some processor specific */
/*operations, but is at least completely portable. */
/* */
/**/
/*a :: The first multiplier. */
/*b :: The second multiplier.*/
/*c :: The divisor.*/
/* */
/*
/*The result of `(a*b)/c’.This function never traps when trying to */
/*divide by zero; it simply returns `MaxInt’ or `MinInt’ depending */
/*on the signs of `a’ and `b’. */
/* */
FT_EXPORT( FT_Long )
FT_MulDiv( FT_Longa,
FT_Longb,
FT_Longc );
/*************************************************************************/
/* */
/*
/*FT_MulFix*/
/* */
/*
/*A very simple function used to perform the computation */
/*`(a*b)/0x10000′ with maximum accuracy.Most of the time this is */
/*used to multiply a given value by a 16.16 fixed-point factor.*/
/* */
/**/
/*a :: The first multiplier. */
/*b :: The second multiplier.Use a 16.16 factor here whenever*/
/* possible (see note below).*/
/* */
/*
/*The result of `(a*b)/0x10000′. */
/* */
/*
/*This function has been optimized for the case where the absolute */
/*value of `a’ is less than 2048, and `b’ is a 16.16 scaling factor. */
/*As this happens mainly when scaling from notional units to */
/*fractional pixels in FreeType, it resulted in noticeable speed */
/*improvements between versions 2.x and 1.x. */
/* */
/*As a conclusion, always try to place a 16.16 factor as the */
/*_second_ argument of this function; this can make a great*/
/*difference.*/
/* */
FT_EXPORT( FT_Long )
FT_MulFix( FT_Longa,
FT_Longb );
/*************************************************************************/
/* */
/*
/*FT_DivFix*/
/* */
/*
/*A very simple function used to perform the computation */
/*`(a*0x10000)/b’ with maximum accuracy.Most of the time, this is*/
/*used to divide a given value by a 16.16 fixed-point factor.*/
/* */
/**/
/*a :: The numerator.*/
/*b :: The denominator.Use a 16.16 factor here.*/
/* */
/*
/*The result of `(a*0x10000)/b’. */
/* */
FT_EXPORT( FT_Long )
FT_DivFix( FT_Longa,
FT_Longb );
/*************************************************************************/
/* */
/*
/*FT_RoundFix*/
/* */
/*
/*A very simple function used to round a 16.16 fixed number. */
/* */
/**/
/*a :: The number to be rounded. */
/* */
/*
/*`a’ rounded to nearest 16.16 fixed integer, halfway cases away */
/*from zero. */
/* */
FT_EXPORT( FT_Fixed )
FT_RoundFix( FT_Fixeda );
/*************************************************************************/
/* */
/*
/*FT_CeilFix */
/* */
/*
/*A very simple function used to compute the ceiling function of a */
/*16.16 fixed number.*/
/* */
/**/
/*a :: The number for which the ceiling function is to be computed.*/
/* */
/*
/*`a’ rounded towards plus infinity. */
/* */
FT_EXPORT( FT_Fixed )
FT_CeilFix( FT_Fixeda );
/*************************************************************************/
/* */
/*
/*FT_FloorFix*/
/* */
/*
/*A very simple function used to compute the floor function of a */
/*16.16 fixed number.*/
/* */
/**/
/*a :: The number for which the floor function is to be computed.*/
/* */
/*
/*`a’ rounded towards minus infinity.*/
/* */
FT_EXPORT( FT_Fixed )
FT_FloorFix( FT_Fixeda );
/*************************************************************************/
/* */
/*
/*FT_Vector_Transform*/
/* */
/*
/*Transform a single vector through a 2×2 matrix.*/
/* */
/*
/*vector :: The target vector to transform.*/
/* */
/* */
/*matrix :: A pointer to the source 2×2 matrix.*/
/* */
/*
/*The result is undefined if either `vector’ or `matrix’ is invalid. */
/* */
FT_EXPORT( void )
FT_Vector_Transform( FT_Vector*vec,
const FT_Matrix*matrix );
/*************************************************************************/
/* */
/*
/*version*/
/* */
/*
/*************************************************************************
*
* @enum:
* FREETYPE_XXX
*
* @description:
* These three macros identify the FreeType source code version.
* Use @FT_Library_Version to access them at runtime.
*
* @values:
* FREETYPE_MAJOR :: The major version number.
* FREETYPE_MINOR :: The minor version number.
* FREETYPE_PATCH :: The patch level.
*
* @note:
* The version number of FreeType if built as a dynamic link library
* with the `libtool’ package is _not_ controlled by these three
* macros.
*
*/
#define FREETYPE_MAJOR2
#define FREETYPE_MINOR6
#define FREETYPE_PATCH1
/*************************************************************************/
/* */
/*
/*FT_Library_Version */
/* */
/*
/*Return the version of the FreeType library being used.This is*/
/*useful when dynamically linking to the library, since one cannot */
/*use the macros @FREETYPE_MAJOR, @FREETYPE_MINOR, and */
/*@FREETYPE_PATCH. */
/* */
/**/
/*library :: A source library handle.*/
/* */
/*
/*************************************************************************/
/* */
/*
/*FT_Face_CheckTrueTypePatents */
/* */
/*
/*Parse all bytecode instructions of a TrueType font file to check */
/*whether any of the patented opcodes are used.This is only useful */
/*if you want to be able to use the unpatented hinter with */
/*fonts that do *not* use these opcodes. */
/* */
/*Note that this function parses *all* glyph instructions in the */
/*font file, which may be slow.*/
/* */
/**/
/*face :: A face handle. */
/* */
/*
/*1~if this is a TrueType font that uses one of the patented */
/*opcodes, 0~otherwise.*/
/* */
/*
/*Since May 2010, TrueType hinting is no longer patented.*/
/* */
/*
/*2.3.5*/
/* */
FT_EXPORT( FT_Bool )
FT_Face_CheckTrueTypePatents( FT_Faceface );
/*************************************************************************/
/* */
/*
/*FT_Face_SetUnpatentedHinting */
/* */
/*
/*Enable or disable the unpatented hinter for a given face.*/
/*Only enable it if you have determined that the face doesn’t*/
/*use any patented opcodes (see @FT_Face_CheckTrueTypePatents).*/
/* */
/**/
/*face:: A face handle.*/
/* */
/*value :: New boolean setting.*/
/* */
/*
/*The old setting value.This will always be false if this is not */
/*an SFNT font, or if the unpatented hinter is not compiled in this*/
/*instance of the library. */
/* */
/*
/*Since May 2010, TrueType hinting is no longer patented.*/
/* */
/*
/*2.3.5*/
/* */
FT_EXPORT( FT_Bool )
FT_Face_SetUnpatentedHinting( FT_Faceface,
FT_Boolvalue );
/* */
FT_END_HEADER
#endif /* __FREETYPE_H__ */
/* END */
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