3707 lines
225 KiB
C
3707 lines
225 KiB
C
/***************************************************************************/
|
|
/* */
|
|
/* freetype.h */
|
|
/* */
|
|
/* FreeType high-level API and common types (specification only). */
|
|
/* */
|
|
/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 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 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 <ft2build.h>"
|
|
#error " #include FT_FREETYPE_H"
|
|
#endif
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* The `raster' component duplicates some of the declarations in */
|
|
/* freetype.h for stand-alone use if _FREETYPE_ isn't defined. */
|
|
/* */
|
|
/*************************************************************************/
|
|
|
|
|
|
#ifndef __FREETYPE_H__
|
|
#define __FREETYPE_H__
|
|
|
|
|
|
#include <ft2build.h>
|
|
#include FT_CONFIG_CONFIG_H
|
|
#include FT_ERRORS_H
|
|
#include FT_TYPES_H
|
|
|
|
|
|
FT_BEGIN_HEADER
|
|
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Section> */
|
|
/* user_allocation */
|
|
/* */
|
|
/* <Title> */
|
|
/* User allocation */
|
|
/* */
|
|
/* <Abstract> */
|
|
/* How client applications should allocate FreeType data structures. */
|
|
/* */
|
|
/* <Description> */
|
|
/* FreeType assumes that structures allocated by the user and passed */
|
|
/* as arguments are zeroed out except for the actual data. With */
|
|
/* other words, it is recommended to use `calloc' (or variants of it) */
|
|
/* instead of `malloc' for allocation. */
|
|
/* */
|
|
/*************************************************************************/
|
|
|
|
|
|
|
|
/*************************************************************************/
|
|
/*************************************************************************/
|
|
/* */
|
|
/* B A S I C T Y P E S */
|
|
/* */
|
|
/*************************************************************************/
|
|
/*************************************************************************/
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Section> */
|
|
/* base_interface */
|
|
/* */
|
|
/* <Title> */
|
|
/* Base Interface */
|
|
/* */
|
|
/* <Abstract> */
|
|
/* The FreeType 2 base font interface. */
|
|
/* */
|
|
/* <Description> */
|
|
/* This section describes the public high-level API of FreeType 2. */
|
|
/* */
|
|
/* <Order> */
|
|
/* FT_Library */
|
|
/* FT_Face */
|
|
/* FT_Size */
|
|
/* FT_GlyphSlot */
|
|
/* FT_CharMap */
|
|
/* FT_Encoding */
|
|
/* */
|
|
/* FT_FaceRec */
|
|
/* */
|
|
/* FT_FACE_FLAG_SCALABLE */
|
|
/* FT_FACE_FLAG_FIXED_SIZES */
|
|
/* FT_FACE_FLAG_FIXED_WIDTH */
|
|
/* FT_FACE_FLAG_HORIZONTAL */
|
|
/* FT_FACE_FLAG_VERTICAL */
|
|
/* FT_FACE_FLAG_SFNT */
|
|
/* FT_FACE_FLAG_KERNING */
|
|
/* FT_FACE_FLAG_MULTIPLE_MASTERS */
|
|
/* FT_FACE_FLAG_GLYPH_NAMES */
|
|
/* FT_FACE_FLAG_EXTERNAL_STREAM */
|
|
/* FT_FACE_FLAG_FAST_GLYPHS */
|
|
/* FT_FACE_FLAG_HINTER */
|
|
/* */
|
|
/* FT_STYLE_FLAG_BOLD */
|
|
/* FT_STYLE_FLAG_ITALIC */
|
|
/* */
|
|
/* FT_SizeRec */
|
|
/* FT_Size_Metrics */
|
|
/* */
|
|
/* FT_GlyphSlotRec */
|
|
/* FT_Glyph_Metrics */
|
|
/* FT_SubGlyph */
|
|
/* */
|
|
/* FT_Bitmap_Size */
|
|
/* */
|
|
/* FT_Init_FreeType */
|
|
/* FT_Done_FreeType */
|
|
/* */
|
|
/* FT_New_Face */
|
|
/* FT_Done_Face */
|
|
/* FT_New_Memory_Face */
|
|
/* FT_Open_Face */
|
|
/* FT_Open_Args */
|
|
/* FT_Parameter */
|
|
/* FT_Attach_File */
|
|
/* FT_Attach_Stream */
|
|
/* */
|
|
/* FT_Set_Char_Size */
|
|
/* FT_Set_Pixel_Sizes */
|
|
/* FT_Request_Size */
|
|
/* FT_Select_Size */
|
|
/* FT_Size_Request_Type */
|
|
/* FT_Size_Request */
|
|
/* FT_Set_Transform */
|
|
/* FT_Load_Glyph */
|
|
/* FT_Get_Char_Index */
|
|
/* FT_Get_Name_Index */
|
|
/* FT_Load_Char */
|
|
/* */
|
|
/* FT_OPEN_MEMORY */
|
|
/* FT_OPEN_STREAM */
|
|
/* FT_OPEN_PATHNAME */
|
|
/* FT_OPEN_DRIVER */
|
|
/* FT_OPEN_PARAMS */
|
|
/* */
|
|
/* FT_LOAD_DEFAULT */
|
|
/* FT_LOAD_RENDER */
|
|
/* FT_LOAD_MONOCHROME */
|
|
/* FT_LOAD_LINEAR_DESIGN */
|
|
/* FT_LOAD_NO_SCALE */
|
|
/* FT_LOAD_NO_HINTING */
|
|
/* FT_LOAD_NO_BITMAP */
|
|
/* FT_LOAD_CROP_BITMAP */
|
|
/* */
|
|
/* FT_LOAD_VERTICAL_LAYOUT */
|
|
/* FT_LOAD_IGNORE_TRANSFORM */
|
|
/* FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH */
|
|
/* FT_LOAD_FORCE_AUTOHINT */
|
|
/* FT_LOAD_NO_RECURSE */
|
|
/* FT_LOAD_PEDANTIC */
|
|
/* */
|
|
/* FT_LOAD_TARGET_NORMAL */
|
|
/* FT_LOAD_TARGET_LIGHT */
|
|
/* FT_LOAD_TARGET_MONO */
|
|
/* FT_LOAD_TARGET_LCD */
|
|
/* FT_LOAD_TARGET_LCD_V */
|
|
/* */
|
|
/* FT_Render_Glyph */
|
|
/* FT_Render_Mode */
|
|
/* FT_Get_Kerning */
|
|
/* FT_Kerning_Mode */
|
|
/* FT_Get_Track_Kerning */
|
|
/* FT_Get_Glyph_Name */
|
|
/* FT_Get_Postscript_Name */
|
|
/* */
|
|
/* FT_CharMapRec */
|
|
/* FT_Select_Charmap */
|
|
/* FT_Set_Charmap */
|
|
/* FT_Get_Charmap_Index */
|
|
/* */
|
|
/*************************************************************************/
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Struct> */
|
|
/* FT_Glyph_Metrics */
|
|
/* */
|
|
/* <Description> */
|
|
/* 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. */
|
|
/* */
|
|
/* <Fields> */
|
|
/* 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. */
|
|
/* */
|
|
/* vertAdvance :: */
|
|
/* Advance height for vertical layout. */
|
|
/* */
|
|
typedef struct FT_Glyph_Metrics_
|
|
{
|
|
FT_Pos width;
|
|
FT_Pos height;
|
|
|
|
FT_Pos horiBearingX;
|
|
FT_Pos horiBearingY;
|
|
FT_Pos horiAdvance;
|
|
|
|
FT_Pos vertBearingX;
|
|
FT_Pos vertBearingY;
|
|
FT_Pos vertAdvance;
|
|
|
|
} FT_Glyph_Metrics;
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Struct> */
|
|
/* FT_Bitmap_Size */
|
|
/* */
|
|
/* <Description> */
|
|
/* 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. */
|
|
/* */
|
|
/* <Fields> */
|
|
/* 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. */
|
|
/* */
|
|
/* <Note> */
|
|
/* 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 struct FT_Bitmap_Size_
|
|
{
|
|
FT_Short height;
|
|
FT_Short width;
|
|
|
|
FT_Pos size;
|
|
|
|
FT_Pos x_ppem;
|
|
FT_Pos y_ppem;
|
|
|
|
} FT_Bitmap_Size;
|
|
|
|
|
|
/*************************************************************************/
|
|
/*************************************************************************/
|
|
/* */
|
|
/* O B J E C T C L A S S E S */
|
|
/* */
|
|
/*************************************************************************/
|
|
/*************************************************************************/
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Type> */
|
|
/* FT_Library */
|
|
/* */
|
|
/* <Description> */
|
|
/* 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). */
|
|
/* */
|
|
/* For multi-threading applications each thread should have its own */
|
|
/* FT_Library object. */
|
|
/* */
|
|
/* <Note> */
|
|
/* Library objects are normally created by @FT_Init_FreeType, and */
|
|
/* destroyed with @FT_Done_FreeType. */
|
|
/* */
|
|
typedef struct FT_LibraryRec_ *FT_Library;
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Type> */
|
|
/* FT_Module */
|
|
/* */
|
|
/* <Description> */
|
|
/* 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;
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Type> */
|
|
/* FT_Driver */
|
|
/* */
|
|
/* <Description> */
|
|
/* 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;
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Type> */
|
|
/* FT_Renderer */
|
|
/* */
|
|
/* <Description> */
|
|
/* 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;
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Type> */
|
|
/* FT_Face */
|
|
/* */
|
|
/* <Description> */
|
|
/* A handle to a given typographic face object. A face object models */
|
|
/* a given typeface, in a given style. */
|
|
/* */
|
|
/* <Note> */
|
|
/* 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). */
|
|
/* */
|
|
/* <Also> */
|
|
/* The @FT_FaceRec details the publicly accessible fields of a given */
|
|
/* face object. */
|
|
/* */
|
|
typedef struct FT_FaceRec_* FT_Face;
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Type> */
|
|
/* FT_Size */
|
|
/* */
|
|
/* <Description> */
|
|
/* A handle to an object used to model a face scaled to a given */
|
|
/* character size. */
|
|
/* */
|
|
/* <Note> */
|
|
/* Each @FT_Face has an _active_ @FT_Size object that is used by */
|
|
/* functions like @FT_Load_Glyph to determine the scaling */
|
|
/* transformation which 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. */
|
|
/* */
|
|
/* <Also> */
|
|
/* The @FT_SizeRec structure details the publicly accessible fields */
|
|
/* of a given size object. */
|
|
/* */
|
|
typedef struct FT_SizeRec_* FT_Size;
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Type> */
|
|
/* FT_GlyphSlot */
|
|
/* */
|
|
/* <Description> */
|
|
/* A handle to a given `glyph slot'. A slot is a container where it */
|
|
/* is possible to load any one 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. */
|
|
/* */
|
|
/* <Also> */
|
|
/* @FT_GlyphSlotRec details the publicly accessible glyph fields. */
|
|
/* */
|
|
typedef struct FT_GlyphSlotRec_* FT_GlyphSlot;
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Type> */
|
|
/* FT_CharMap */
|
|
/* */
|
|
/* <Description> */
|
|
/* 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. */
|
|
/* */
|
|
/* <Note> */
|
|
/* 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. */
|
|
/* */
|
|
/* <Also> */
|
|
/* The @FT_CharMapRec details the publicly accessible fields of a */
|
|
/* given character map. */
|
|
/* */
|
|
typedef struct FT_CharMapRec_* FT_CharMap;
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Macro> */
|
|
/* FT_ENC_TAG */
|
|
/* */
|
|
/* <Description> */
|
|
/* This macro converts four-letter tags into an unsigned long. It is */
|
|
/* used to define `encoding' identifiers (see @FT_Encoding). */
|
|
/* */
|
|
/* <Note> */
|
|
/* Since many 16bit compilers don't like 32bit 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 */
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Enum> */
|
|
/* FT_Encoding */
|
|
/* */
|
|
/* <Description> */
|
|
/* An enumeration used to specify character sets supported by */
|
|
/* charmaps. Used in the @FT_Select_Charmap API function. */
|
|
/* */
|
|
/* <Note> */
|
|
/* Despite the name, this enumeration lists specific character */
|
|
/* repertories (i.e., charsets), and not text encoding methods (e.g., */
|
|
/* UTF-8, UTF-16, GB2312_EUC, etc.). */
|
|
/* */
|
|
/* Because of 32-bit charcodes defined in Unicode (i.e., surrogates), */
|
|
/* all character codes must be expressed as FT_Longs. */
|
|
/* */
|
|
/* Other encodings might be defined in the future. */
|
|
/* */
|
|
/* <Values> */
|
|
/* 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. */
|
|
/* */
|
|
/* FT_ENCODING_MS_SYMBOL :: */
|
|
/* Corresponds to the Microsoft Symbol encoding, used to encode */
|
|
/* mathematical symbols in the 32..255 character code range. For */
|
|
/* more information, see `http://www.ceviz.net/symbol.htm'. */
|
|
/* */
|
|
/* FT_ENCODING_SJIS :: */
|
|
/* Corresponds to Japanese SJIS encoding. More info at */
|
|
/* at `http://langsupport.japanreference.com/encoding.shtml'. */
|
|
/* 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 */
|
|
/* `http://www.microsoft.com/typography/unicode/949.txt'. */
|
|
/* */
|
|
/* 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. */
|
|
/* */
|
|
/* <Note> */
|
|
/* By default, FreeType automatically synthetizes 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 c */
|
|
/* @FT_Get_CMap_Language_ID to query the Mac language ID which 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 enum FT_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;
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Enum> */
|
|
/* ft_encoding_xxx */
|
|
/* */
|
|
/* <Description> */
|
|
/* These constants are deprecated; use the corresponding @FT_Encoding */
|
|
/* values instead. */
|
|
/* */
|
|
#define ft_encoding_none FT_ENCODING_NONE
|
|
#define ft_encoding_unicode FT_ENCODING_UNICODE
|
|
#define ft_encoding_symbol FT_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_sjis FT_ENCODING_SJIS
|
|
#define ft_encoding_gb2312 FT_ENCODING_GB2312
|
|
#define ft_encoding_big5 FT_ENCODING_BIG5
|
|
#define ft_encoding_wansung FT_ENCODING_WANSUNG
|
|
#define ft_encoding_johab FT_ENCODING_JOHAB
|
|
|
|
#define ft_encoding_adobe_standard FT_ENCODING_ADOBE_STANDARD
|
|
#define ft_encoding_adobe_expert FT_ENCODING_ADOBE_EXPERT
|
|
#define ft_encoding_adobe_custom FT_ENCODING_ADOBE_CUSTOM
|
|
#define ft_encoding_apple_roman FT_ENCODING_APPLE_ROMAN
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Struct> */
|
|
/* FT_CharMapRec */
|
|
/* */
|
|
/* <Description> */
|
|
/* The base charmap structure. */
|
|
/* */
|
|
/* <Fields> */
|
|
/* 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 struct FT_CharMapRec_
|
|
{
|
|
FT_Face face;
|
|
FT_Encoding encoding;
|
|
FT_UShort platform_id;
|
|
FT_UShort encoding_id;
|
|
|
|
} FT_CharMapRec;
|
|
|
|
|
|
/*************************************************************************/
|
|
/*************************************************************************/
|
|
/* */
|
|
/* B A S E O B J E C T C L A S S E S */
|
|
/* */
|
|
/*************************************************************************/
|
|
/*************************************************************************/
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Type> */
|
|
/* FT_Face_Internal */
|
|
/* */
|
|
/* <Description> */
|
|
/* 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;
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Struct> */
|
|
/* FT_FaceRec */
|
|
/* */
|
|
/* <Description> */
|
|
/* FreeType root face class structure. A face object models a */
|
|
/* typeface in a font file. */
|
|
/* */
|
|
/* <Fields> */
|
|
/* num_faces :: The number of faces in the font file. Some */
|
|
/* font formats can have multiple faces in */
|
|
/* a font file. */
|
|
/* */
|
|
/* face_index :: The index of the face in the font file. It */
|
|
/* is set to 0 if there is only one face in */
|
|
/* the font file. */
|
|
/* */
|
|
/* face_flags :: A set of bit flags that give important */
|
|
/* information about the face; see */
|
|
/* @FT_FACE_FLAG_XXX for the details. */
|
|
/* */
|
|
/* style_flags :: A set of bit flags indicating the style of */
|
|
/* the face; see @FT_STYLE_FLAG_XXX for the */
|
|
/* details. */
|
|
/* */
|
|
/* 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. */
|
|
/* */
|
|
/* family_name :: The face's family name. This is an ASCII */
|
|
/* string, usually in English, which 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). */
|
|
/* */
|
|
/* style_name :: The face's style name. This is an ASCII */
|
|
/* string, usually in English, which 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 `maximal */
|
|
/* ascender', and `bbox.yMin' as the `minimal */
|
|
/* descender'. Only relevant for scalable */
|
|
/* formats. */
|
|
/* */
|
|
/* 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 :: The height is the vertical distance */
|
|
/* between two consecutive baselines, */
|
|
/* expressed in font units. It is always */
|
|
/* positive. Only relevant for scalable */
|
|
/* formats. */
|
|
/* */
|
|
/* max_advance_width :: The maximal 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 maximal 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's 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. */
|
|
/* */
|
|
/* <Note> */
|
|
/* Fields may be changed after a call to @FT_Attach_File or */
|
|
/* @FT_Attach_Stream. */
|
|
/* */
|
|
typedef struct FT_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_Int num_fixed_sizes;
|
|
FT_Bitmap_Size* available_sizes;
|
|
|
|
FT_Int num_charmaps;
|
|
FT_CharMap* charmaps;
|
|
|
|
FT_Generic generic;
|
|
|
|
/*# 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_Short ascender;
|
|
FT_Short descender;
|
|
FT_Short height;
|
|
|
|
FT_Short max_advance_width;
|
|
FT_Short max_advance_height;
|
|
|
|
FT_Short underline_position;
|
|
FT_Short underline_thickness;
|
|
|
|
FT_GlyphSlot glyph;
|
|
FT_Size size;
|
|
FT_CharMap charmap;
|
|
|
|
/*@private begin */
|
|
|
|
FT_Driver driver;
|
|
FT_Memory memory;
|
|
FT_Stream stream;
|
|
|
|
FT_ListRec sizes_list;
|
|
|
|
FT_Generic autohint;
|
|
void* extensions;
|
|
|
|
FT_Face_Internal internal;
|
|
|
|
/*@private end */
|
|
|
|
} FT_FaceRec;
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Enum> */
|
|
/* FT_FACE_FLAG_XXX */
|
|
/* */
|
|
/* <Description> */
|
|
/* 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. */
|
|
/* */
|
|
/* <Values> */
|
|
/* 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. */
|
|
/* */
|
|
#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 )
|
|
|
|
/* */
|
|
|
|
|
|
/*************************************************************************
|
|
*
|
|
* @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 vertical
|
|
* metrics.
|
|
*
|
|
*/
|
|
#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 )
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Constant> */
|
|
/* FT_STYLE_FLAG_XXX */
|
|
/* */
|
|
/* <Description> */
|
|
/* 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. */
|
|
/* */
|
|
/* <Values> */
|
|
/* 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. */
|
|
/* */
|
|
/* <Note> */
|
|
/* 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 )
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Type> */
|
|
/* FT_Size_Internal */
|
|
/* */
|
|
/* <Description> */
|
|
/* 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;
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Struct> */
|
|
/* FT_Size_Metrics */
|
|
/* */
|
|
/* <Description> */
|
|
/* The size metrics structure gives the metrics of a size object. */
|
|
/* */
|
|
/* <Fields> */
|
|
/* 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 maximal advance width in 26.6 fractional */
|
|
/* pixels. See @FT_FaceRec for the details. */
|
|
/* */
|
|
/* <Note> */
|
|
/* 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 struct FT_Size_Metrics_
|
|
{
|
|
FT_UShort x_ppem; /* horizontal pixels per EM */
|
|
FT_UShort y_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;
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Struct> */
|
|
/* FT_SizeRec */
|
|
/* */
|
|
/* <Description> */
|
|
/* FreeType root size class structure. A size object models a face */
|
|
/* object at a given size. */
|
|
/* */
|
|
/* <Fields> */
|
|
/* face :: Handle to the parent face object. */
|
|
/* */
|
|
/* generic :: A typeless pointer, which is 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 struct FT_SizeRec_
|
|
{
|
|
FT_Face face; /* parent face object */
|
|
FT_Generic generic; /* generic pointer for client uses */
|
|
FT_Size_Metrics metrics; /* size metrics */
|
|
FT_Size_Internal internal;
|
|
|
|
} FT_SizeRec;
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Struct> */
|
|
/* FT_SubGlyph */
|
|
/* */
|
|
/* <Description> */
|
|
/* The subglyph structure is an internal object used to describe */
|
|
/* subglyphs (for example, in the case of composites). */
|
|
/* */
|
|
/* <Note> */
|
|
/* 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;
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Type> */
|
|
/* FT_Slot_Internal */
|
|
/* */
|
|
/* <Description> */
|
|
/* 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;
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Struct> */
|
|
/* FT_GlyphSlotRec */
|
|
/* */
|
|
/* <Description> */
|
|
/* 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. */
|
|
/* */
|
|
/* <Fields> */
|
|
/* 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 which is 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 is the transformed advance width for the */
|
|
/* glyph. */
|
|
/* */
|
|
/* 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 :: This is the bitmap's left bearing expressed */
|
|
/* in integer pixels. Of course, this is only */
|
|
/* valid if the format is */
|
|
/* @FT_GLYPH_FORMAT_BITMAP. */
|
|
/* */
|
|
/* bitmap_top :: This is 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. */
|
|
/* For now this is internal to FreeType. */
|
|
/* */
|
|
/* 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 autohinting is */
|
|
/* active. Zero otherwise. */
|
|
/* */
|
|
/* rsb_delta :: The difference between hinted and unhinted */
|
|
/* right side bearing while autohinting is */
|
|
/* active. Zero otherwise. */
|
|
/* */
|
|
/* <Note> */
|
|
/* 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 convert 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. */
|
|
/* */
|
|
/* <Note> */
|
|
/* Here a small pseudo code fragment which shows how to use */
|
|
/* `lsb_delta' and `rsb_delta': */
|
|
/* */
|
|
/* { */
|
|
/* FT_Pos origin_x = 0; */
|
|
/* FT_Pos prev_rsb_delta = 0; */
|
|
/* */
|
|
/* */
|
|
/* for all glyphs do */
|
|
/* <compute kern between current and previous glyph and add it to */
|
|
/* `origin_x'> */
|
|
/* */
|
|
/* <load glyph with `FT_Load_Glyph'> */
|
|
/* */
|
|
/* 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; */
|
|
/* */
|
|
/* <save glyph image, or render glyph, or ...> */
|
|
/* */
|
|
/* origin_x += face->glyph->advance.x; */
|
|
/* endfor */
|
|
/* } */
|
|
/* */
|
|
typedef struct FT_GlyphSlotRec_
|
|
{
|
|
FT_Library library;
|
|
FT_Face face;
|
|
FT_GlyphSlot next;
|
|
FT_UInt reserved; /* retained for binary compatibility */
|
|
FT_Generic generic;
|
|
|
|
FT_Glyph_Metrics metrics;
|
|
FT_Fixed linearHoriAdvance;
|
|
FT_Fixed linearVertAdvance;
|
|
FT_Vector advance;
|
|
|
|
FT_Glyph_Format format;
|
|
|
|
FT_Bitmap bitmap;
|
|
FT_Int bitmap_left;
|
|
FT_Int bitmap_top;
|
|
|
|
FT_Outline outline;
|
|
|
|
FT_UInt num_subglyphs;
|
|
FT_SubGlyph subglyphs;
|
|
|
|
void* control_data;
|
|
long control_len;
|
|
|
|
FT_Pos lsb_delta;
|
|
FT_Pos rsb_delta;
|
|
|
|
void* other;
|
|
|
|
FT_Slot_Internal internal;
|
|
|
|
} FT_GlyphSlotRec;
|
|
|
|
|
|
/*************************************************************************/
|
|
/*************************************************************************/
|
|
/* */
|
|
/* F U N C T I O N S */
|
|
/* */
|
|
/*************************************************************************/
|
|
/*************************************************************************/
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Init_FreeType */
|
|
/* */
|
|
/* <Description> */
|
|
/* Initialize a new FreeType library object. The set of modules */
|
|
/* that are registered by this function is determined at build time. */
|
|
/* */
|
|
/* <Output> */
|
|
/* alibrary :: A handle to a new library object. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
FT_EXPORT( FT_Error )
|
|
FT_Init_FreeType( FT_Library *alibrary );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Done_FreeType */
|
|
/* */
|
|
/* <Description> */
|
|
/* Destroy a given FreeType library object and all of its children, */
|
|
/* including resources, drivers, faces, sizes, etc. */
|
|
/* */
|
|
/* <Input> */
|
|
/* library :: A handle to the target library object. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
FT_EXPORT( FT_Error )
|
|
FT_Done_FreeType( FT_Library library );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Enum> */
|
|
/* FT_OPEN_XXX */
|
|
/* */
|
|
/* <Description> */
|
|
/* A list of bit-field constants used within the `flags' field of the */
|
|
/* @FT_Open_Args structure. */
|
|
/* */
|
|
/* <Values> */
|
|
/* 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. */
|
|
/* */
|
|
/* ft_open_memory :: Deprecated; use @FT_OPEN_MEMORY instead. */
|
|
/* */
|
|
/* ft_open_stream :: Deprecated; use @FT_OPEN_STREAM instead. */
|
|
/* */
|
|
/* ft_open_pathname :: Deprecated; use @FT_OPEN_PATHNAME instead. */
|
|
/* */
|
|
/* ft_open_driver :: Deprecated; use @FT_OPEN_DRIVER instead. */
|
|
/* */
|
|
/* ft_open_params :: Deprecated; use @FT_OPEN_PARAMS instead. */
|
|
/* */
|
|
/* <Note> */
|
|
/* The `FT_OPEN_MEMORY', `FT_OPEN_STREAM', and `FT_OPEN_PATHNAME' */
|
|
/* flags are mutually exclusive. */
|
|
/* */
|
|
#define FT_OPEN_MEMORY 0x1
|
|
#define FT_OPEN_STREAM 0x2
|
|
#define FT_OPEN_PATHNAME 0x4
|
|
#define FT_OPEN_DRIVER 0x8
|
|
#define FT_OPEN_PARAMS 0x10
|
|
|
|
#define ft_open_memory FT_OPEN_MEMORY /* deprecated */
|
|
#define ft_open_stream FT_OPEN_STREAM /* deprecated */
|
|
#define ft_open_pathname FT_OPEN_PATHNAME /* deprecated */
|
|
#define ft_open_driver FT_OPEN_DRIVER /* deprecated */
|
|
#define ft_open_params FT_OPEN_PARAMS /* deprecated */
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Struct> */
|
|
/* FT_Parameter */
|
|
/* */
|
|
/* <Description> */
|
|
/* A simple structure used to pass more or less generic parameters */
|
|
/* to @FT_Open_Face. */
|
|
/* */
|
|
/* <Fields> */
|
|
/* tag :: A four-byte identification tag. */
|
|
/* */
|
|
/* data :: A pointer to the parameter data. */
|
|
/* */
|
|
/* <Note> */
|
|
/* The ID and function of parameters are driver-specific. */
|
|
/* */
|
|
typedef struct FT_Parameter_
|
|
{
|
|
FT_ULong tag;
|
|
FT_Pointer data;
|
|
|
|
} FT_Parameter;
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Struct> */
|
|
/* FT_Open_Args */
|
|
/* */
|
|
/* <Description> */
|
|
/* 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. */
|
|
/* */
|
|
/* <Fields> */
|
|
/* 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. */
|
|
/* */
|
|
/* <Note> */
|
|
/* The stream type is determined by the contents of `flags' which */
|
|
/* 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. With */
|
|
/* other words, applications should treat them as read-only. */
|
|
/* */
|
|
typedef struct FT_Open_Args_
|
|
{
|
|
FT_UInt flags;
|
|
const FT_Byte* memory_base;
|
|
FT_Long memory_size;
|
|
FT_String* pathname;
|
|
FT_Stream stream;
|
|
FT_Module driver;
|
|
FT_Int num_params;
|
|
FT_Parameter* params;
|
|
|
|
} FT_Open_Args;
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_New_Face */
|
|
/* */
|
|
/* <Description> */
|
|
/* This function calls @FT_Open_Face to open a font by its pathname. */
|
|
/* */
|
|
/* <InOut> */
|
|
/* library :: A handle to the library resource. */
|
|
/* */
|
|
/* <Input> */
|
|
/* pathname :: A path to the font file. */
|
|
/* */
|
|
/* face_index :: The index of the face within the font. The first */
|
|
/* face has index 0. */
|
|
/* */
|
|
/* <Output> */
|
|
/* aface :: A handle to a new face object. If `face_index' is */
|
|
/* greater than or equal to zero, it must be non-NULL. */
|
|
/* See @FT_Open_Face for more details. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
FT_EXPORT( FT_Error )
|
|
FT_New_Face( FT_Library library,
|
|
const char* filepathname,
|
|
FT_Long face_index,
|
|
FT_Face *aface );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_New_Memory_Face */
|
|
/* */
|
|
/* <Description> */
|
|
/* This function calls @FT_Open_Face to open a font which has been */
|
|
/* loaded into memory. */
|
|
/* */
|
|
/* <InOut> */
|
|
/* library :: A handle to the library resource. */
|
|
/* */
|
|
/* <Input> */
|
|
/* 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 :: The index of the face within the font. The first */
|
|
/* face has index 0. */
|
|
/* */
|
|
/* <Output> */
|
|
/* aface :: A handle to a new face object. If `face_index' is */
|
|
/* greater than or equal to zero, it must be non-NULL. */
|
|
/* See @FT_Open_Face for more details. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
/* <Note> */
|
|
/* You must not deallocate the memory before calling @FT_Done_Face. */
|
|
/* */
|
|
FT_EXPORT( FT_Error )
|
|
FT_New_Memory_Face( FT_Library library,
|
|
const FT_Byte* file_base,
|
|
FT_Long file_size,
|
|
FT_Long face_index,
|
|
FT_Face *aface );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Open_Face */
|
|
/* */
|
|
/* <Description> */
|
|
/* Create a face object from a given resource described by */
|
|
/* @FT_Open_Args. */
|
|
/* */
|
|
/* <InOut> */
|
|
/* library :: A handle to the library resource. */
|
|
/* */
|
|
/* <Input> */
|
|
/* args :: A pointer to an `FT_Open_Args' structure which must */
|
|
/* be filled by the caller. */
|
|
/* */
|
|
/* face_index :: The index of the face within the font. The first */
|
|
/* face has index 0. */
|
|
/* */
|
|
/* <Output> */
|
|
/* aface :: A handle to a new face object. If `face_index' is */
|
|
/* greater than or equal to zero, it must be non-NULL. */
|
|
/* See note below. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
/* <Note> */
|
|
/* Unlike FreeType 1.x, this function automatically creates a glyph */
|
|
/* slot for the face object which can be accessed directly through */
|
|
/* `face->glyph'. */
|
|
/* */
|
|
/* FT_Open_Face can be used to quickly check whether the font */
|
|
/* format of a given font resource is supported by FreeType. If the */
|
|
/* `face_index' field is negative, the function's return value is 0 */
|
|
/* if the font format is recognized, or non-zero otherwise; */
|
|
/* the function returns a more or less empty face handle in `*aface' */
|
|
/* (if `aface' isn't NULL). The only useful field in this special */
|
|
/* case is `face->num_faces' which gives the number of faces within */
|
|
/* the font file. After examination, the returned @FT_Face structure */
|
|
/* should be deallocated with a call to @FT_Done_Face. */
|
|
/* */
|
|
/* Each new face object created with this function also owns a */
|
|
/* default @FT_Size object, accessible as `face->size'. */
|
|
/* */
|
|
FT_EXPORT( FT_Error )
|
|
FT_Open_Face( FT_Library library,
|
|
const FT_Open_Args* args,
|
|
FT_Long face_index,
|
|
FT_Face *aface );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Attach_File */
|
|
/* */
|
|
/* <Description> */
|
|
/* This function calls @FT_Attach_Stream to attach a file. */
|
|
/* */
|
|
/* <InOut> */
|
|
/* face :: The target face object. */
|
|
/* */
|
|
/* <Input> */
|
|
/* filepathname :: The pathname. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
FT_EXPORT( FT_Error )
|
|
FT_Attach_File( FT_Face face,
|
|
const char* filepathname );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Attach_Stream */
|
|
/* */
|
|
/* <Description> */
|
|
/* `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. */
|
|
/* */
|
|
/* <InOut> */
|
|
/* face :: The target face object. */
|
|
/* */
|
|
/* <Input> */
|
|
/* parameters :: A pointer to @FT_Open_Args which must be filled by */
|
|
/* the caller. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
/* <Note> */
|
|
/* 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_Face face,
|
|
FT_Open_Args* parameters );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Done_Face */
|
|
/* */
|
|
/* <Description> */
|
|
/* Discard a given face object, as well as all of its child slots and */
|
|
/* sizes. */
|
|
/* */
|
|
/* <Input> */
|
|
/* face :: A handle to a target face object. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
FT_EXPORT( FT_Error )
|
|
FT_Done_Face( FT_Face face );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Select_Size */
|
|
/* */
|
|
/* <Description> */
|
|
/* Select a bitmap strike. */
|
|
/* */
|
|
/* <InOut> */
|
|
/* face :: A handle to a target face object. */
|
|
/* */
|
|
/* <Input> */
|
|
/* strike_index :: The index of the bitmap strike in the */
|
|
/* `available_sizes' field of @FT_FaceRec structure. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
FT_EXPORT( FT_Error )
|
|
FT_Select_Size( FT_Face face,
|
|
FT_Int strike_index );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Enum> */
|
|
/* FT_Size_Request_Type */
|
|
/* */
|
|
/* <Description> */
|
|
/* An enumeration type that lists the supported size request types. */
|
|
/* */
|
|
/* <Values> */
|
|
/* 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 80x24 cells. */
|
|
/* */
|
|
/* FT_SIZE_REQUEST_TYPE_SCALES :: */
|
|
/* Specify the scaling values directly. */
|
|
/* */
|
|
/* <Note> */
|
|
/* 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 enum FT_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;
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Struct> */
|
|
/* FT_Size_RequestRec */
|
|
/* */
|
|
/* <Description> */
|
|
/* A structure used to model a size request. */
|
|
/* */
|
|
/* <Fields> */
|
|
/* 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. */
|
|
/* */
|
|
/* <Note> */
|
|
/* If `width' is zero, then the horizontal scaling value is set */
|
|
/* equal to the vertical scaling value, and vice versa. */
|
|
/* */
|
|
typedef struct FT_Size_RequestRec_
|
|
{
|
|
FT_Size_Request_Type type;
|
|
FT_Long width;
|
|
FT_Long height;
|
|
FT_UInt horiResolution;
|
|
FT_UInt vertResolution;
|
|
|
|
} FT_Size_RequestRec;
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Struct> */
|
|
/* FT_Size_Request */
|
|
/* */
|
|
/* <Description> */
|
|
/* A handle to a size request structure. */
|
|
/* */
|
|
typedef struct FT_Size_RequestRec_ *FT_Size_Request;
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Request_Size */
|
|
/* */
|
|
/* <Description> */
|
|
/* Resize the scale of the active @FT_Size object in a face. */
|
|
/* */
|
|
/* <InOut> */
|
|
/* face :: A handle to a target face object. */
|
|
/* */
|
|
/* <Input> */
|
|
/* req :: A pointer to a @FT_Size_RequestRec. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
/* <Note> */
|
|
/* 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. */
|
|
/* */
|
|
FT_EXPORT( FT_Error )
|
|
FT_Request_Size( FT_Face face,
|
|
FT_Size_Request req );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Set_Char_Size */
|
|
/* */
|
|
/* <Description> */
|
|
/* This function calls @FT_Request_Size to request the nominal size */
|
|
/* (in points). */
|
|
/* */
|
|
/* <InOut> */
|
|
/* face :: A handle to a target face object. */
|
|
/* */
|
|
/* <Input> */
|
|
/* 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. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
/* <Note> */
|
|
/* 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. */
|
|
/* */
|
|
|
|
FT_EXPORT( FT_Error )
|
|
FT_Set_Char_Size( FT_Face face,
|
|
FT_F26Dot6 char_width,
|
|
FT_F26Dot6 char_height,
|
|
FT_UInt horz_resolution,
|
|
FT_UInt vert_resolution );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Set_Pixel_Sizes */
|
|
/* */
|
|
/* <Description> */
|
|
/* This function calls @FT_Request_Size to request the nominal size */
|
|
/* (in pixels). */
|
|
/* */
|
|
/* <InOut> */
|
|
/* face :: A handle to the target face object. */
|
|
/* */
|
|
/* <Input> */
|
|
/* pixel_width :: The nominal width, in pixels. */
|
|
/* */
|
|
/* pixel_height :: The nominal height, in pixels. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
FT_EXPORT( FT_Error )
|
|
FT_Set_Pixel_Sizes( FT_Face face,
|
|
FT_UInt pixel_width,
|
|
FT_UInt pixel_height );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Load_Glyph */
|
|
/* */
|
|
/* <Description> */
|
|
/* A function used to load a single glyph into the glyph slot of a */
|
|
/* face object. */
|
|
/* */
|
|
/* <InOut> */
|
|
/* face :: A handle to the target face object where the glyph */
|
|
/* is loaded. */
|
|
/* */
|
|
/* <Input> */
|
|
/* 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). */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
/* <Note> */
|
|
/* 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 which */
|
|
/* 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_Int32 load_flags );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Load_Char */
|
|
/* */
|
|
/* <Description> */
|
|
/* A function used to load a single glyph into the glyph slot of a */
|
|
/* face object, according to its character code. */
|
|
/* */
|
|
/* <InOut> */
|
|
/* face :: A handle to a target face object where the glyph */
|
|
/* is loaded. */
|
|
/* */
|
|
/* <Input> */
|
|
/* 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). */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
/* <Note> */
|
|
/* This function simply calls @FT_Get_Char_Index and @FT_Load_Glyph. */
|
|
/* */
|
|
FT_EXPORT( FT_Error )
|
|
FT_Load_Char( FT_Face face,
|
|
FT_ULong char_code,
|
|
FT_Int32 load_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 outline glyph loaded, but keep it in font units.
|
|
*
|
|
* This flag implies @FT_LOAD_NO_HINTING and @FT_LOAD_NO_BITMAP, and
|
|
* unsets @FT_LOAD_RENDER.
|
|
*
|
|
* FT_LOAD_NO_HINTING ::
|
|
* Disable hinting. This generally generates `blurrier' bitmap glyph
|
|
* when the glyph is 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. _Don't_ use it as it is
|
|
* problematic currently.
|
|
*
|
|
* FT_LOAD_FORCE_AUTOHINT ::
|
|
* Indicates that the auto-hinter is preferred over the font's native
|
|
* hinter. See also the note below.
|
|
*
|
|
* FT_LOAD_CROP_BITMAP ::
|
|
* Indicates that the font driver should crop the loaded bitmap glyph
|
|
* (i.e., remove all space around its black bits). Not all drivers
|
|
* implement this.
|
|
*
|
|
* 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.
|
|
*
|
|
* FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH ::
|
|
* Indicates that the font driver should ignore the global advance
|
|
* width defined in the font. By default, that value is used as the
|
|
* advance width for all glyphs when the face has
|
|
* @FT_FACE_FLAG_FIXED_WIDTH set.
|
|
*
|
|
* This flag exists for historical reasons (to support buggy CJK
|
|
* fonts).
|
|
*
|
|
* FT_LOAD_NO_RECURSE ::
|
|
* This flag is only used internally. It merely indicates 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 sub-glyphs is not available to client
|
|
* applications for now.
|
|
*
|
|
* 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 use @FT_LOAD_TARGET_MONO instead 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.
|
|
*
|
|
* @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.
|
|
*
|
|
* Besides deciding which hinter to use, you can also decide which
|
|
* hinting algorithm to use. See @FT_LOAD_TARGET_XXX for details.
|
|
*/
|
|
#define FT_LOAD_DEFAULT 0x0
|
|
#define FT_LOAD_NO_SCALE 0x1
|
|
#define FT_LOAD_NO_HINTING 0x2
|
|
#define FT_LOAD_RENDER 0x4
|
|
#define FT_LOAD_NO_BITMAP 0x8
|
|
#define FT_LOAD_VERTICAL_LAYOUT 0x10
|
|
#define FT_LOAD_FORCE_AUTOHINT 0x20
|
|
#define FT_LOAD_CROP_BITMAP 0x40
|
|
#define FT_LOAD_PEDANTIC 0x80
|
|
#define FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH 0x200
|
|
#define FT_LOAD_NO_RECURSE 0x400
|
|
#define FT_LOAD_IGNORE_TRANSFORM 0x800
|
|
#define FT_LOAD_MONOCHROME 0x1000
|
|
#define FT_LOAD_LINEAR_DESIGN 0x2000
|
|
#define FT_LOAD_SBITS_ONLY 0x4000 /* temporary hack! */
|
|
#define FT_LOAD_NO_AUTOHINT 0x8000U
|
|
|
|
/* */
|
|
|
|
|
|
/**************************************************************************
|
|
*
|
|
* @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 which matches the used algorithm
|
|
* best) unless @FT_LOAD_MONOCHROME is set.
|
|
*
|
|
* 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_NORMAL FT_LOAD_TARGET_( FT_RENDER_MODE_NORMAL )
|
|
#define FT_LOAD_TARGET_LIGHT FT_LOAD_TARGET_( FT_RENDER_MODE_LIGHT )
|
|
#define FT_LOAD_TARGET_MONO FT_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 ) )
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Set_Transform */
|
|
/* */
|
|
/* <Description> */
|
|
/* 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. */
|
|
/* */
|
|
/* <InOut> */
|
|
/* face :: A handle to the source face object. */
|
|
/* */
|
|
/* <Input> */
|
|
/* matrix :: A pointer to the transformation's 2x2 matrix. Use 0 for */
|
|
/* the identity matrix. */
|
|
/* delta :: A pointer to the translation vector. Use 0 for the null */
|
|
/* vector. */
|
|
/* */
|
|
/* <Note> */
|
|
/* 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 );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Enum> */
|
|
/* FT_Render_Mode */
|
|
/* */
|
|
/* <Description> */
|
|
/* 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 the `bitmap->pixel_mode' field in the */
|
|
/* @FT_GlyphSlotRec structure gives the format of the returned */
|
|
/* bitmap. */
|
|
/* */
|
|
/* <Values> */
|
|
/* FT_RENDER_MODE_NORMAL :: */
|
|
/* This is the default render mode; it corresponds to 8-bit */
|
|
/* anti-aliased bitmaps, using 256 levels of opacity. */
|
|
/* */
|
|
/* 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. */
|
|
/* */
|
|
/* 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. */
|
|
/* */
|
|
/* <Note> */
|
|
/* 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. */
|
|
/* */
|
|
typedef enum FT_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;
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Enum> */
|
|
/* ft_render_mode_xxx */
|
|
/* */
|
|
/* <Description> */
|
|
/* These constants are deprecated. Use the corresponding */
|
|
/* @FT_Render_Mode values instead. */
|
|
/* */
|
|
/* <Values> */
|
|
/* ft_render_mode_normal :: see @FT_RENDER_MODE_NORMAL */
|
|
/* ft_render_mode_mono :: see @FT_RENDER_MODE_MONO */
|
|
/* */
|
|
#define ft_render_mode_normal FT_RENDER_MODE_NORMAL
|
|
#define ft_render_mode_mono FT_RENDER_MODE_MONO
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Render_Glyph */
|
|
/* */
|
|
/* <Description> */
|
|
/* Convert a given glyph image to a bitmap. It does so by inspecting */
|
|
/* the glyph image format, finding the relevant renderer, and */
|
|
/* invoking it. */
|
|
/* */
|
|
/* <InOut> */
|
|
/* slot :: A handle to the glyph slot containing the image to */
|
|
/* convert. */
|
|
/* */
|
|
/* <Input> */
|
|
/* 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. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
FT_EXPORT( FT_Error )
|
|
FT_Render_Glyph( FT_GlyphSlot slot,
|
|
FT_Render_Mode render_mode );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Enum> */
|
|
/* FT_Kerning_Mode */
|
|
/* */
|
|
/* <Description> */
|
|
/* An enumeration used to specify which kerning values to return in */
|
|
/* @FT_Get_Kerning. */
|
|
/* */
|
|
/* <Values> */
|
|
/* FT_KERNING_DEFAULT :: Return scaled and grid-fitted kerning */
|
|
/* distances (value is 0). */
|
|
/* */
|
|
/* FT_KERNING_UNFITTED :: Return scaled but un-grid-fitted kerning */
|
|
/* distances. */
|
|
/* */
|
|
/* FT_KERNING_UNSCALED :: Return the kerning vector in original font */
|
|
/* units. */
|
|
/* */
|
|
typedef enum FT_Kerning_Mode_
|
|
{
|
|
FT_KERNING_DEFAULT = 0,
|
|
FT_KERNING_UNFITTED,
|
|
FT_KERNING_UNSCALED
|
|
|
|
} FT_Kerning_Mode;
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Const> */
|
|
/* ft_kerning_default */
|
|
/* */
|
|
/* <Description> */
|
|
/* This constant is deprecated. Please use @FT_KERNING_DEFAULT */
|
|
/* instead. */
|
|
/* */
|
|
#define ft_kerning_default FT_KERNING_DEFAULT
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Const> */
|
|
/* ft_kerning_unfitted */
|
|
/* */
|
|
/* <Description> */
|
|
/* This constant is deprecated. Please use @FT_KERNING_UNFITTED */
|
|
/* instead. */
|
|
/* */
|
|
#define ft_kerning_unfitted FT_KERNING_UNFITTED
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Const> */
|
|
/* ft_kerning_unscaled */
|
|
/* */
|
|
/* <Description> */
|
|
/* This constant is deprecated. Please use @FT_KERNING_UNSCALED */
|
|
/* instead. */
|
|
/* */
|
|
#define ft_kerning_unscaled FT_KERNING_UNSCALED
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Get_Kerning */
|
|
/* */
|
|
/* <Description> */
|
|
/* Return the kerning vector between two glyphs of a same face. */
|
|
/* */
|
|
/* <Input> */
|
|
/* 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. */
|
|
/* */
|
|
/* <Output> */
|
|
/* akerning :: The kerning vector. This is either in font units */
|
|
/* or in pixels (26.6 format) for scalable formats, */
|
|
/* and in pixels for fixed-sizes formats. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
/* <Note> */
|
|
/* Only horizontal layouts (left-to-right & right-to-left) are */
|
|
/* supported by this method. Other layouts, or more sophisticated */
|
|
/* kernings, are out of the scope of this API function -- they can be */
|
|
/* implemented through format-specific interfaces. */
|
|
/* */
|
|
FT_EXPORT( FT_Error )
|
|
FT_Get_Kerning( FT_Face face,
|
|
FT_UInt left_glyph,
|
|
FT_UInt right_glyph,
|
|
FT_UInt kern_mode,
|
|
FT_Vector *akerning );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Get_Track_Kerning */
|
|
/* */
|
|
/* <Description> */
|
|
/* Return the track kerning for a given face object at a given size. */
|
|
/* */
|
|
/* <Input> */
|
|
/* face :: A handle to a source face object. */
|
|
/* */
|
|
/* point_size :: The point size in 16.16 fractional points. */
|
|
/* */
|
|
/* degree :: The degree of tightness. */
|
|
/* */
|
|
/* <Output> */
|
|
/* akerning :: The kerning in 16.16 fractional points. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
FT_EXPORT( FT_Error )
|
|
FT_Get_Track_Kerning( FT_Face face,
|
|
FT_Fixed point_size,
|
|
FT_Int degree,
|
|
FT_Fixed* akerning );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Get_Glyph_Name */
|
|
/* */
|
|
/* <Description> */
|
|
/* 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. */
|
|
/* */
|
|
/* <Input> */
|
|
/* face :: A handle to a source face object. */
|
|
/* */
|
|
/* glyph_index :: The glyph index. */
|
|
/* */
|
|
/* buffer_max :: The maximal number of bytes available in the */
|
|
/* buffer. */
|
|
/* */
|
|
/* <Output> */
|
|
/* buffer :: A pointer to a target buffer where the name is */
|
|
/* copied to. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
/* <Note> */
|
|
/* An error is returned if the face doesn't provide glyph names or if */
|
|
/* the glyph index is invalid. In all cases of failure, the first */
|
|
/* byte of `buffer' is set to 0 to indicate an empty name. */
|
|
/* */
|
|
/* The glyph name is truncated to fit within the buffer if it is too */
|
|
/* long. The returned string is always zero-terminated. */
|
|
/* */
|
|
/* This function is not compiled within the library if the config */
|
|
/* macro `FT_CONFIG_OPTION_NO_GLYPH_NAMES' is defined in */
|
|
/* `include/freetype/config/ftoptions.h'. */
|
|
/* */
|
|
FT_EXPORT( FT_Error )
|
|
FT_Get_Glyph_Name( FT_Face face,
|
|
FT_UInt glyph_index,
|
|
FT_Pointer buffer,
|
|
FT_UInt buffer_max );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Get_Postscript_Name */
|
|
/* */
|
|
/* <Description> */
|
|
/* Retrieve the ASCII Postscript name of a given face, if available. */
|
|
/* This only works with Postscript and TrueType fonts. */
|
|
/* */
|
|
/* <Input> */
|
|
/* face :: A handle to the source face object. */
|
|
/* */
|
|
/* <Return> */
|
|
/* A pointer to the face's Postscript name. NULL if unavailable. */
|
|
/* */
|
|
/* <Note> */
|
|
/* The returned pointer is owned by the face and is destroyed with */
|
|
/* it. */
|
|
/* */
|
|
FT_EXPORT( const char* )
|
|
FT_Get_Postscript_Name( FT_Face face );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Select_Charmap */
|
|
/* */
|
|
/* <Description> */
|
|
/* Select a given charmap by its encoding tag (as listed in */
|
|
/* `freetype.h'). */
|
|
/* */
|
|
/* <InOut> */
|
|
/* face :: A handle to the source face object. */
|
|
/* */
|
|
/* <Input> */
|
|
/* encoding :: A handle to the selected encoding. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
/* <Note> */
|
|
/* 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 */
|
|
/* which 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_Face face,
|
|
FT_Encoding encoding );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Set_Charmap */
|
|
/* */
|
|
/* <Description> */
|
|
/* Select a given charmap for character code to glyph index mapping. */
|
|
/* */
|
|
/* <InOut> */
|
|
/* face :: A handle to the source face object. */
|
|
/* */
|
|
/* <Input> */
|
|
/* charmap :: A handle to the selected charmap. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
/* <Note> */
|
|
/* 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_CharMap charmap );
|
|
|
|
|
|
/*************************************************************************
|
|
*
|
|
* @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.
|
|
*
|
|
*/
|
|
FT_EXPORT( FT_Int )
|
|
FT_Get_Charmap_Index( FT_CharMap charmap );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Get_Char_Index */
|
|
/* */
|
|
/* <Description> */
|
|
/* Return the glyph index of a given character code. This function */
|
|
/* uses a charmap object to do the mapping. */
|
|
/* */
|
|
/* <Input> */
|
|
/* face :: A handle to the source face object. */
|
|
/* */
|
|
/* charcode :: The character code. */
|
|
/* */
|
|
/* <Return> */
|
|
/* The glyph index. 0 means `undefined character code'. */
|
|
/* */
|
|
/* <Note> */
|
|
/* 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'. */
|
|
/* */
|
|
FT_EXPORT( FT_UInt )
|
|
FT_Get_Char_Index( FT_Face face,
|
|
FT_ULong charcode );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Get_First_Char */
|
|
/* */
|
|
/* <Description> */
|
|
/* 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. */
|
|
/* */
|
|
/* <Input> */
|
|
/* face :: A handle to the source face object. */
|
|
/* */
|
|
/* <Output> */
|
|
/* agindex :: Glyph index of first character code. 0 if charmap is */
|
|
/* empty. */
|
|
/* */
|
|
/* <Return> */
|
|
/* The charmap's first character code. */
|
|
/* */
|
|
/* <Note> */
|
|
/* You should use this function with @FT_Get_Next_Char to be able to */
|
|
/* parse all character codes available in a given charmap. The code */
|
|
/* should look like this: */
|
|
/* */
|
|
/* { */
|
|
/* FT_ULong charcode; */
|
|
/* FT_UInt gindex; */
|
|
/* */
|
|
/* */
|
|
/* charcode = FT_Get_First_Char( face, &gindex ); */
|
|
/* while ( gindex != 0 ) */
|
|
/* { */
|
|
/* ... do something with (charcode,gindex) pair ... */
|
|
/* */
|
|
/* charcode = FT_Get_Next_Char( face, charcode, &gindex ); */
|
|
/* } */
|
|
/* } */
|
|
/* */
|
|
/* Note that `*agindex' is set to 0 if the charmap is empty. The */
|
|
/* result itself can be 0 in two cases: if the charmap is empty or */
|
|
/* when the value 0 is the first valid character code. */
|
|
/* */
|
|
FT_EXPORT( FT_ULong )
|
|
FT_Get_First_Char( FT_Face face,
|
|
FT_UInt *agindex );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Get_Next_Char */
|
|
/* */
|
|
/* <Description> */
|
|
/* 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. */
|
|
/* */
|
|
/* <Input> */
|
|
/* face :: A handle to the source face object. */
|
|
/* char_code :: The starting character code. */
|
|
/* */
|
|
/* <Output> */
|
|
/* agindex :: Glyph index of first character code. 0 if charmap */
|
|
/* is empty. */
|
|
/* */
|
|
/* <Return> */
|
|
/* The charmap's next character code. */
|
|
/* */
|
|
/* <Note> */
|
|
/* You should use this function with @FT_Get_First_Char to walk */
|
|
/* over all character codes available in a given charmap. See the */
|
|
/* note for this function for a simple code example. */
|
|
/* */
|
|
/* Note that `*agindex' is set to 0 when there are no more codes in */
|
|
/* the charmap. */
|
|
/* */
|
|
FT_EXPORT( FT_ULong )
|
|
FT_Get_Next_Char( FT_Face face,
|
|
FT_ULong char_code,
|
|
FT_UInt *agindex );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Get_Name_Index */
|
|
/* */
|
|
/* <Description> */
|
|
/* Return the glyph index of a given glyph name. This function uses */
|
|
/* driver specific objects to do the translation. */
|
|
/* */
|
|
/* <Input> */
|
|
/* face :: A handle to the source face object. */
|
|
/* */
|
|
/* glyph_name :: The glyph name. */
|
|
/* */
|
|
/* <Return> */
|
|
/* 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_WORDS 1
|
|
#define FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES 2
|
|
#define FT_SUBGLYPH_FLAG_ROUND_XY_TO_GRID 4
|
|
#define FT_SUBGLYPH_FLAG_SCALE 8
|
|
#define FT_SUBGLYPH_FLAG_XY_SCALE 0x40
|
|
#define FT_SUBGLYPH_FLAG_2X2 0x80
|
|
#define FT_SUBGLYPH_FLAG_USE_MY_METRICS 0x200
|
|
|
|
|
|
/*************************************************************************
|
|
*
|
|
* @func:
|
|
* FT_Get_SubGlyph_Info
|
|
*
|
|
* @description:
|
|
* Retrieve a description of a given subglyph. Only use it if
|
|
* `glyph->format' is @FT_GLYPH_FORMAT_COMPOSITE, or an error is
|
|
* returned.
|
|
*
|
|
* @input:
|
|
* glyph ::
|
|
* The source glyph slot.
|
|
*
|
|
* sub_index ::
|
|
* The index of 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_GlyphSlot glyph,
|
|
FT_UInt sub_index,
|
|
FT_Int *p_index,
|
|
FT_UInt *p_flags,
|
|
FT_Int *p_arg1,
|
|
FT_Int *p_arg2,
|
|
FT_Matrix *p_transform );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Section> */
|
|
/* glyph_variants */
|
|
/* */
|
|
/* <Title> */
|
|
/* Glyph Variants */
|
|
/* */
|
|
/* <Abstract> */
|
|
/* The FreeType 2 interface to Unicode Ideographic Variation */
|
|
/* Sequences (IVS), using the SFNT cmap format 14. */
|
|
/* */
|
|
/* <Description> */
|
|
/* Many CJK characters have variant forms. They are a sort of grey */
|
|
/* area somewhere between being totally irrelevant and semantically */
|
|
/* distinct; for this reason, the Unicode consortium decided to */
|
|
/* introduce Ideographic Variation Sequences (IVS), consisting of a */
|
|
/* Unicode base character and one of 240 variant selectors */
|
|
/* (U+E0100-U+E01EF), instead of further extending the already huge */
|
|
/* code range for CJK characters. */
|
|
/* */
|
|
/* An IVS is registered and unique; for further details please refer */
|
|
/* to Unicode Technical Report #37, the Ideographic Variation */
|
|
/* Database. To date (October 2007), the character with the most */
|
|
/* variants is U+908A, having 8 such IVS. */
|
|
/* */
|
|
/* Adobe and MS decided to support IVS with a new cmap subtable */
|
|
/* (format 14). It is an odd subtable because it is not a mapping of */
|
|
/* input code points to glyphs, but contains lists of all variants */
|
|
/* supported by the font. */
|
|
/* */
|
|
/* A variant may be either `default' or `non-default'. A default */
|
|
/* variant is the one you will get for that code point if you look it */
|
|
/* up in the standard Unicode cmap. A non-default variant is a */
|
|
/* different glyph. */
|
|
/* */
|
|
/*************************************************************************/
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Face_GetCharVariantIndex */
|
|
/* */
|
|
/* <Description> */
|
|
/* Return the glyph index of a given character code as modified by */
|
|
/* the variation selector. */
|
|
/* */
|
|
/* <Input> */
|
|
/* face :: */
|
|
/* A handle to the source face object. */
|
|
/* */
|
|
/* charcode :: */
|
|
/* The character code point in Unicode. */
|
|
/* */
|
|
/* variantSelector :: */
|
|
/* The Unicode code point of the variation selector. */
|
|
/* */
|
|
/* <Return> */
|
|
/* 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'. */
|
|
/* */
|
|
/* <Note> */
|
|
/* 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. */
|
|
/* */
|
|
/* <Since> */
|
|
/* 2.3.6 */
|
|
/* */
|
|
FT_EXPORT( FT_UInt )
|
|
FT_Face_GetCharVariantIndex( FT_Face face,
|
|
FT_ULong charcode,
|
|
FT_ULong variantSelector );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Face_GetCharVariantIsDefault */
|
|
/* */
|
|
/* <Description> */
|
|
/* Check whether this variant of this Unicode character is the one to */
|
|
/* be found in the `cmap'. */
|
|
/* */
|
|
/* <Input> */
|
|
/* face :: */
|
|
/* A handle to the source face object. */
|
|
/* */
|
|
/* charcode :: */
|
|
/* The character codepoint in Unicode. */
|
|
/* */
|
|
/* variantSelector :: */
|
|
/* The Unicode codepoint of the variation selector. */
|
|
/* */
|
|
/* <Return> */
|
|
/* 1 if found in the standard (Unicode) cmap, 0 if found in the */
|
|
/* variation selector cmap, or -1 if it is not a variant. */
|
|
/* */
|
|
/* <Note> */
|
|
/* This function is only meaningful if the font has a variation */
|
|
/* selector cmap subtable. */
|
|
/* */
|
|
/* <Since> */
|
|
/* 2.3.6 */
|
|
/* */
|
|
FT_EXPORT( FT_Int )
|
|
FT_Face_GetCharVariantIsDefault( FT_Face face,
|
|
FT_ULong charcode,
|
|
FT_ULong variantSelector );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Face_GetVariantSelectors */
|
|
/* */
|
|
/* <Description> */
|
|
/* Return a zero-terminated list of Unicode variant selectors found */
|
|
/* in the font. */
|
|
/* */
|
|
/* <Input> */
|
|
/* face :: */
|
|
/* A handle to the source face object. */
|
|
/* */
|
|
/* <Return> */
|
|
/* A pointer to an array of selector code points, or NULL if there is */
|
|
/* no valid variant selector cmap subtable. */
|
|
/* */
|
|
/* <Note> */
|
|
/* 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. */
|
|
/* */
|
|
/* <Since> */
|
|
/* 2.3.6 */
|
|
/* */
|
|
FT_EXPORT( FT_UInt32* )
|
|
FT_Face_GetVariantSelectors( FT_Face face );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Face_GetVariantsOfChar */
|
|
/* */
|
|
/* <Description> */
|
|
/* Return a zero-terminated list of Unicode variant selectors found */
|
|
/* for the specified character code. */
|
|
/* */
|
|
/* <Input> */
|
|
/* face :: */
|
|
/* A handle to the source face object. */
|
|
/* */
|
|
/* charcode :: */
|
|
/* The character codepoint in Unicode. */
|
|
/* */
|
|
/* <Return> */
|
|
/* A pointer to an array of variant selector code points which are */
|
|
/* active for the given character, or NULL if the corresponding list */
|
|
/* is empty. */
|
|
/* */
|
|
/* <Note> */
|
|
/* 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. */
|
|
/* */
|
|
/* <Since> */
|
|
/* 2.3.6 */
|
|
/* */
|
|
FT_EXPORT( FT_UInt32* )
|
|
FT_Face_GetVariantsOfChar( FT_Face face,
|
|
FT_ULong charcode );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Face_GetCharsOfVariant */
|
|
/* */
|
|
/* <Description> */
|
|
/* Return a zero-terminated list of Unicode character codes found for */
|
|
/* the specified variant selector. */
|
|
/* */
|
|
/* <Input> */
|
|
/* face :: */
|
|
/* A handle to the source face object. */
|
|
/* */
|
|
/* variantSelector :: */
|
|
/* The variant selector code point in Unicode. */
|
|
/* */
|
|
/* <Return> */
|
|
/* A list of all the code points which 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. */
|
|
/* */
|
|
/* <Note> */
|
|
/* 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. */
|
|
/* */
|
|
/* <Since> */
|
|
/* 2.3.6 */
|
|
/* */
|
|
FT_EXPORT( FT_UInt32* )
|
|
FT_Face_GetCharsOfVariant( FT_Face face,
|
|
FT_ULong variantSelector );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Section> */
|
|
/* computations */
|
|
/* */
|
|
/* <Title> */
|
|
/* Computations */
|
|
/* */
|
|
/* <Abstract> */
|
|
/* Crunching fixed numbers and vectors. */
|
|
/* */
|
|
/* <Description> */
|
|
/* This section contains various functions used to perform */
|
|
/* computations on 16.16 fixed-float numbers or 2d vectors. */
|
|
/* */
|
|
/* <Order> */
|
|
/* FT_MulDiv */
|
|
/* FT_MulFix */
|
|
/* FT_DivFix */
|
|
/* FT_RoundFix */
|
|
/* FT_CeilFix */
|
|
/* FT_FloorFix */
|
|
/* FT_Vector_Transform */
|
|
/* FT_Matrix_Multiply */
|
|
/* FT_Matrix_Invert */
|
|
/* */
|
|
/*************************************************************************/
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_MulDiv */
|
|
/* */
|
|
/* <Description> */
|
|
/* A very simple function used to perform the computation `(a*b)/c' */
|
|
/* with maximal 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. */
|
|
/* */
|
|
/* <Input> */
|
|
/* a :: The first multiplier. */
|
|
/* b :: The second multiplier. */
|
|
/* c :: The divisor. */
|
|
/* */
|
|
/* <Return> */
|
|
/* 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_Long a,
|
|
FT_Long b,
|
|
FT_Long c );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_MulFix */
|
|
/* */
|
|
/* <Description> */
|
|
/* A very simple function used to perform the computation */
|
|
/* `(a*b)/0x10000' with maximal accuracy. Most of the time this is */
|
|
/* used to multiply a given value by a 16.16 fixed float factor. */
|
|
/* */
|
|
/* <Input> */
|
|
/* a :: The first multiplier. */
|
|
/* b :: The second multiplier. Use a 16.16 factor here whenever */
|
|
/* possible (see note below). */
|
|
/* */
|
|
/* <Return> */
|
|
/* The result of `(a*b)/0x10000'. */
|
|
/* */
|
|
/* <Note> */
|
|
/* 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_Long a,
|
|
FT_Long b );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_DivFix */
|
|
/* */
|
|
/* <Description> */
|
|
/* A very simple function used to perform the computation */
|
|
/* `(a*0x10000)/b' with maximal accuracy. Most of the time, this is */
|
|
/* used to divide a given value by a 16.16 fixed float factor. */
|
|
/* */
|
|
/* <Input> */
|
|
/* a :: The first multiplier. */
|
|
/* b :: The second multiplier. Use a 16.16 factor here whenever */
|
|
/* possible (see note below). */
|
|
/* */
|
|
/* <Return> */
|
|
/* The result of `(a*0x10000)/b'. */
|
|
/* */
|
|
/* <Note> */
|
|
/* The optimization for FT_DivFix() is simple: If (a << 16) fits in */
|
|
/* 32 bits, then the division is computed directly. Otherwise, we */
|
|
/* use a specialized version of @FT_MulDiv. */
|
|
/* */
|
|
FT_EXPORT( FT_Long )
|
|
FT_DivFix( FT_Long a,
|
|
FT_Long b );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_RoundFix */
|
|
/* */
|
|
/* <Description> */
|
|
/* A very simple function used to round a 16.16 fixed number. */
|
|
/* */
|
|
/* <Input> */
|
|
/* a :: The number to be rounded. */
|
|
/* */
|
|
/* <Return> */
|
|
/* The result of `(a + 0x8000) & -0x10000'. */
|
|
/* */
|
|
FT_EXPORT( FT_Fixed )
|
|
FT_RoundFix( FT_Fixed a );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_CeilFix */
|
|
/* */
|
|
/* <Description> */
|
|
/* A very simple function used to compute the ceiling function of a */
|
|
/* 16.16 fixed number. */
|
|
/* */
|
|
/* <Input> */
|
|
/* a :: The number for which the ceiling function is to be computed. */
|
|
/* */
|
|
/* <Return> */
|
|
/* The result of `(a + 0x10000 - 1) & -0x10000'. */
|
|
/* */
|
|
FT_EXPORT( FT_Fixed )
|
|
FT_CeilFix( FT_Fixed a );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_FloorFix */
|
|
/* */
|
|
/* <Description> */
|
|
/* A very simple function used to compute the floor function of a */
|
|
/* 16.16 fixed number. */
|
|
/* */
|
|
/* <Input> */
|
|
/* a :: The number for which the floor function is to be computed. */
|
|
/* */
|
|
/* <Return> */
|
|
/* The result of `a & -0x10000'. */
|
|
/* */
|
|
FT_EXPORT( FT_Fixed )
|
|
FT_FloorFix( FT_Fixed a );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Vector_Transform */
|
|
/* */
|
|
/* <Description> */
|
|
/* Transform a single vector through a 2x2 matrix. */
|
|
/* */
|
|
/* <InOut> */
|
|
/* vector :: The target vector to transform. */
|
|
/* */
|
|
/* <Input> */
|
|
/* matrix :: A pointer to the source 2x2 matrix. */
|
|
/* */
|
|
/* <Note> */
|
|
/* The result is undefined if either `vector' or `matrix' is invalid. */
|
|
/* */
|
|
FT_EXPORT( void )
|
|
FT_Vector_Transform( FT_Vector* vec,
|
|
const FT_Matrix* matrix );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Section> */
|
|
/* version */
|
|
/* */
|
|
/* <Title> */
|
|
/* FreeType Version */
|
|
/* */
|
|
/* <Abstract> */
|
|
/* Functions and macros related to FreeType versions. */
|
|
/* */
|
|
/* <Description> */
|
|
/* Note that those functions and macros are of limited use because */
|
|
/* even a new release of FreeType with only documentation changes */
|
|
/* increases the version number. */
|
|
/* */
|
|
/*************************************************************************/
|
|
|
|
|
|
/*************************************************************************
|
|
*
|
|
* @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_MAJOR 2
|
|
#define FREETYPE_MINOR 3
|
|
#define FREETYPE_PATCH 5
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Library_Version */
|
|
/* */
|
|
/* <Description> */
|
|
/* 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. */
|
|
/* */
|
|
/* <Input> */
|
|
/* library :: A source library handle. */
|
|
/* */
|
|
/* <Output> */
|
|
/* amajor :: The major version number. */
|
|
/* */
|
|
/* aminor :: The minor version number. */
|
|
/* */
|
|
/* apatch :: The patch version number. */
|
|
/* */
|
|
/* <Note> */
|
|
/* The reason why this function takes a `library' argument is because */
|
|
/* certain programs implement library initialization in a custom way */
|
|
/* that doesn't use @FT_Init_FreeType. */
|
|
/* */
|
|
/* In such cases, the library version might not be available before */
|
|
/* the library object has been created. */
|
|
/* */
|
|
FT_EXPORT( void )
|
|
FT_Library_Version( FT_Library library,
|
|
FT_Int *amajor,
|
|
FT_Int *aminor,
|
|
FT_Int *apatch );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Face_CheckTrueTypePatents */
|
|
/* */
|
|
/* <Description> */
|
|
/* 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. */
|
|
/* */
|
|
/* <Input> */
|
|
/* face :: A face handle. */
|
|
/* */
|
|
/* <Return> */
|
|
/* 1 if this is a TrueType font that uses one of the patented */
|
|
/* opcodes, 0 otherwise. */
|
|
/* */
|
|
/* <Since> */
|
|
/* 2.3.5 */
|
|
/* */
|
|
FT_EXPORT( FT_Bool )
|
|
FT_Face_CheckTrueTypePatents( FT_Face face );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Face_SetUnpatentedHinting */
|
|
/* */
|
|
/* <Description> */
|
|
/* 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). */
|
|
/* */
|
|
/* <Input> */
|
|
/* face :: A face handle. */
|
|
/* */
|
|
/* value :: New boolean setting. */
|
|
/* */
|
|
/* <Return> */
|
|
/* The old setting value. This will always be false if this is not */
|
|
/* a SFNT font, or if the unpatented hinter is not compiled in this */
|
|
/* instance of the library. */
|
|
/* */
|
|
/* <Since> */
|
|
/* 2.3.5 */
|
|
/* */
|
|
FT_EXPORT( FT_Bool )
|
|
FT_Face_SetUnpatentedHinting( FT_Face face,
|
|
FT_Bool value );
|
|
|
|
/* */
|
|
|
|
|
|
FT_END_HEADER
|
|
|
|
#endif /* __FREETYPE_H__ */
|
|
|
|
|
|
/* END */
|