FLT_API(3) API provided by libm17n-flt.so.

Data Structures


struct MFLTGlyph
Type of information about a glyph.
struct MFLTGlyphAdjustment
Type of information about a glyph position adjustment.
struct MFLTGlyphString
Type of information about a glyph sequence.
struct MFLTOtfSpec
Type of specification of GSUB and GPOS OpenType tables.
struct MFLTFont
Type of font to be used by the FLT driver.

Typedefs


typedef struct _MFLT MFLT
Type of FLT (Font Layout Table).

Functions


MFLT * mflt_get (MSymbol name)
Return an FLT object that has a specified name.
MFLT * mflt_find (int c, MFLTFont *font)
Find an FLT suitable for the specified character and font.
const char * mflt_name (MFLT *flt)
Return the name of an FLT.
MCharTable * mflt_coverage (MFLT *flt)
Return a coverage of a FLT.
int mflt_run (MFLTGlyphString *gstring, int from, int to, MFLTFont *font, MFLT *flt)
Layout characters with an FLT.
MFLT * mdebug_dump_flt (MFLT *flt, int indent)
Dump a Font Layout Table.
void mflt_dump_gstring (MFLTGlyphString *gstring)
Dump an MFLTGlyphString.

Variables


int mflt_enable_new_feature
Flag to control several new OTF handling commands.
int(* mflt_iterate_otf_feature )(struct _MFLTFont *font, MFLTOtfSpec *spec, int from, int to, unsigned char *table)

MSymbol(* mflt_font_id )(struct _MFLTFont *font)

int(* mflt_try_otf )(struct _MFLTFont *font, MFLTOtfSpec *spec, MFLTGlyphString *gstring, int from, int to)

Detailed Description

API provided by libm17n-flt.so.

FLT support for a window system.

This section defines the m17n FLT API concerning character layouting facility using FLT (Font Layout Table). The format of FLT is described in mdbFLT.

Data Structure Documentation

MFLTGlyph

FIELD DOCUMENTATION:

int MFLTGlyph::c

unsigned int MFLTGlyph::code

int MFLTGlyph::from

int MFLTGlyph::to

int MFLTGlyph::xadv

int MFLTGlyph::yadv

int MFLTGlyph::ascent

int MFLTGlyph::descent

int MFLTGlyph::lbearing

int MFLTGlyph::rbearing

int MFLTGlyph::xoff

int MFLTGlyph::yoff

unsigned MFLTGlyph::encoded

unsigned MFLTGlyph::measured

unsigned MFLTGlyph::adjusted

unsigned MFLTGlyph::internal

MFLTGlyphAdjustment

FIELD DOCUMENTATION:

int MFLTGlyphAdjustment::xadv

int MFLTGlyphAdjustment::yadv

int MFLTGlyphAdjustment::xoff

int MFLTGlyphAdjustment::yoff

short MFLTGlyphAdjustment::back

unsigned MFLTGlyphAdjustment::advance_is_absolute

unsigned MFLTGlyphAdjustment::set

MFLTGlyphString

FIELD DOCUMENTATION:

int MFLTGlyphString::glyph_size
      (MFLTGlyph)'. 

MFLTGlyph* MFLTGlyphString::glyphs

int MFLTGlyphString::allocated

int MFLTGlyphString::used

unsigned int MFLTGlyphString::r2l

MFLTOtfSpec

FIELD DOCUMENTATION:

MSymbol MFLTOtfSpec::sym

unsigned int MFLTOtfSpec::script

unsigned int MFLTOtfSpec::langsys

unsigned int* MFLTOtfSpec::features[2]

(1) The case of using this information for selecting which features to apply to a glyph string. If the array is NULL, apply no feature. If the first element is 0xFFFFFFFF, apply all available features except for what appear in the second and following elements (if any). Otherwise, apply all listed features.

(2) The case of using this information for checking if a a font can be drived by a specific FLT. If the array is NULL, the font should not have any features. Otherwize, the font should have all features before 0xFFFFFFFF element (if any) and should not have any features after that element.

MFLTFont

FIELD DOCUMENTATION:

MSymbol MFLTFont::family

int MFLTFont::x_ppem

int MFLTFont::y_ppem

int(* MFLTFont::get_glyph_id)(struct _MFLTFont *font, MFLTGlyphString *gstring, int from, int to)

int(* MFLTFont::get_metrics)(struct _MFLTFont *font, MFLTGlyphString *gstring, int from, int to)

int(* MFLTFont::check_otf)(struct _MFLTFont *font, MFLTOtfSpec *spec)

int(* MFLTFont::drive_otf)(struct _MFLTFont *font, MFLTOtfSpec *spec, MFLTGlyphString *in, int from, int to, MFLTGlyphString *out, MFLTGlyphAdjustment *adjustment)

void* MFLTFont::internal

Typedef Documentation

typedef struct _MFLT MFLT

Type of FLT (Font Layout Table). The type MFLT is for an FLT object. Its internal structure is concealed from application programs.

Variable Documentation

int mflt_enable_new_feature

Flag to control several new OTF handling commands. If the variable mflt_enable_new_feature is nonzero, the function mflt_run() can drive a Font Layout Table that contains the new OTF-related commands ':otf?' and/or OTF feature specification in a category table.

int(* mflt_iterate_otf_feature)(struct _MFLTFont *font, MFLTOtfSpec *spec, int from, int to, unsigned char *table)

MSymbol(* mflt_font_id)(struct _MFLTFont *font)

int(* mflt_try_otf)(struct _MFLTFont *font, MFLTOtfSpec *spec, MFLTGlyphString *gstring, int from, int to)

Author

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COPYRIGHT

Copyright (C) 2001 Information-technology Promotion Agency (IPA)
Copyright (C) 2001-2011 National Institute of Advanced Industrial Science and Technology (AIST)
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License <http://www.gnu.org/licenses/fdl.html>.

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