2276 lines
144 KiB
C
2276 lines
144 KiB
C
/***************************************************************************/
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/* */
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/* freetype.h */
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/* */
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/* FreeType high-level API and common types (specification only). */
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/* */
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/* Copyright 1996-1999 by */
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */
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/* */
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/* This file is part of the FreeType project, and may only be used */
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/* modified and distributed under the terms of the FreeType project */
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/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
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/* this file you indicate that you have read the license and */
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/* understand and accept it fully. */
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/* */
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/***************************************************************************/
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#ifndef FREETYPE_H
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#define FREETYPE_H
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/*************************************************************************/
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/* */
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/* The `raster' component duplicates some of the declarations in */
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/* freetype.h for stand-alone use if _FREETYPE_ isn't defined. */
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/* */
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#define _FREETYPE_
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/*************************************************************************/
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/* */
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/* The FREETYPE_MAJOR and FREETYPE_MINOR macros are used to version the */
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/* new FreeType design, which is able to host several kinds of font */
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/* drivers. It starts at 2.0. Note that each driver has its own */
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/* version number (for example, the TrueType driver is at 1.2, as */
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/* defined by the macros TT_FREETYPE_MAJOR and TT_FREETYPE_MINOR in the */
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/* file `ttlib/truetype.h'. */
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/* */
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#define FREETYPE_MAJOR 2
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#define FREETYPE_MINOR 0
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/*************************************************************************/
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/* */
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/* To make freetype.h independent from configuration files we check */
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/* whether EXPORT_DEF has been defined already. */
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/* */
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/* On some systems and compilers (Win32 mostly), an extra keyword is */
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/* necessary to compile the library as a DLL. */
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/* */
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#ifndef EXPORT_DEF
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#define EXPORT_DEF(x) extern x
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#endif
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#include <freetype/fterrors.h>
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#include <freetype/fttypes.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*************************************************************************/
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/*************************************************************************/
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/* */
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/* B A S I C T Y P E S */
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/* */
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/*************************************************************************/
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/*************************************************************************/
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/*************************************************************************/
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/* */
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/* <Struct> */
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/* FT_Glyph_Metrics */
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/* */
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/* <Description> */
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/* A structure used to model the metrics of a single glyph. Note */
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/* that values are expressed in 26.6 fractional pixel format or in */
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/* font units, depending on context. */
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/* */
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/* <Fields> */
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/* width :: The glyph's width. */
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/* height :: The glyph's height. */
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/* */
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/* horiBearingX :: Horizontal left side bearing. */
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/* horiBearingY :: Horizontal top side bearing. */
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/* horiAdvance :: Horizontal advance width. */
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/* */
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/* vertBearingX :: Vertical left side bearing. */
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/* vertBearingY :: Vertical top side bearing. */
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/* vertAdvance :: Vertical advance height. */
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/* */
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typedef struct FT_Glyph_Metrics_
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{
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FT_Pos width; /* glyph width */
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FT_Pos height; /* glyph height */
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FT_Pos horiBearingX; /* left side bearing in horizontal layouts */
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FT_Pos horiBearingY; /* top side bearing in horizontal layouts */
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FT_Pos horiAdvance; /* advance width for horizontal layout */
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FT_Pos vertBearingX; /* left side bearing in vertical layouts */
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FT_Pos vertBearingY; /* top side bearing in vertical layouts */
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FT_Pos vertAdvance; /* advance height for vertical layout */
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} FT_Glyph_Metrics;
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/*************************************************************************/
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/* */
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/* <FuncType> */
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/* FT_Generic_Finalizer */
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/* */
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/* <Description> */
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/* Describes a function used to destroy the `client' data of any */
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/* FreeType object. See the description of the FT_Generic type for */
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/* details of usage. */
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/* */
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/* <Input> */
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/* The address of the FreeType object which is under finalisation. */
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/* Its client data is accessed through its `generic' field. */
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/* */
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typedef void (*FT_Generic_Finalizer)(void* object);
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/*************************************************************************/
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/* */
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/* <Struct> */
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/* FT_Generic */
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/* */
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/* <Description> */
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/* Client applications often need to associate their own data to a */
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/* variety of FreeType core objects. For example, a text layout API */
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/* might want to associate a glyph cache to a given size object. */
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/* */
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/* Most FreeType object contains a `generic' field, of type */
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/* FT_Generic, which usage is left to client applications and font */
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/* servers. */
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/* */
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/* It can be used to store a pointer to client-specific data, as well */
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/* as the address of a `finalizer' function, which will be called by */
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/* FreeType when the object is destroyed (for example, the previous */
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/* client example would put the address of the glyph cache destructor */
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/* in the `finalizer' field). */
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/* */
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/* <Fields> */
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/* data :: A typeless pointer to any client-specified data. This */
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/* field is completely ignored by the FreeType library. */
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/* */
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/* finalizer :: A pointer to a `generic finalizer' function, which */
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/* will be called when the object is destroyed. If this */
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/* field is set to NULL, no code will be called. */
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/* */
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typedef struct FT_Generic_
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{
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void* data;
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FT_Generic_Finalizer finalizer;
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} FT_Generic;
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/*************************************************************************/
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/* */
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/* <Struct> */
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/* FT_Bitmap_Size */
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/* */
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/* <Description> */
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/* An extremely simple structure used to model the size of a bitmap */
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/* strike (i.e., a bitmap instance of the font for a given */
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/* resolution) in a fixed-size font face. This is used for the */
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/* `available_sizes' field of the FT_Face_Properties structure. */
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/* */
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/* <Fields> */
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/* height :: The character height in pixels. */
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/* width :: The character width in pixels. */
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/* */
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typedef struct FT_Bitmap_Size_
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{
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FT_Short height;
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FT_Short width;
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} FT_Bitmap_Size;
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/*************************************************************************/
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/*************************************************************************/
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/* */
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/* O B J E C T C L A S S E S */
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/* */
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/*************************************************************************/
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/*************************************************************************/
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/*************************************************************************/
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/* */
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/* <Type> */
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/* FT_Library */
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/* */
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/* <Description> */
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/* A handle to a FreeType library instance. Each `library' is */
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/* completely independent from the others; it is the `root' of a set */
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/* of objects like fonts, faces, sizes, etc. */
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/* */
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/* It also embeds a system object (see FT_System), as well as a */
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/* scan-line converter object (see FT_Raster). */
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/* */
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/* <Note> */
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/* Library objects are created through FT_Init_FreeType(). */
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/* */
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typedef struct FT_LibraryRec_ *FT_Library;
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/*************************************************************************/
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/* */
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/* <Type> */
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/* FT_Driver */
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/* */
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/* <Description> */
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/* A handle to a given FreeType font driver object. Each font driver */
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/* is able to create faces, sizes, glyph slots, and charmaps from the */
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/* resources whose format it supports. */
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/* */
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/* A driver can support either bitmap, graymap, or scalable font */
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/* formats. */
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/* */
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typedef struct FT_DriverRec_* FT_Driver;
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/*************************************************************************/
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/* */
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/* <Type> */
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/* FT_Face */
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/* */
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/* <Description> */
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/* A handle to a given driver face object. A face object contains */
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/* all the instance and glyph independent data of a font file */
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/* typeface. */
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/* */
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/* A face object is created from a resource object through the */
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/* new_face() method of a given driver. */
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/* */
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typedef struct FT_FaceRec_* FT_Face;
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/*************************************************************************/
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/* */
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/* <Type> */
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/* FT_Size */
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/* */
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/* <Description> */
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/* A handle to a given driver size object. Such an object models the */
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/* _resolution_ AND _size_ dependent state of a given driver face */
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/* size. */
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/* */
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/* A size object is always created from a given face object. It is */
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/* discarded automatically by its parent face. */
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/* */
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typedef struct FT_SizeRec_* FT_Size;
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/*************************************************************************/
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/* */
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/* <Type> */
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/* FT_GlyphSlot */
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/* */
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/* <Description> */
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/* A handle to a given `glyph slot'. A slot is a container where it */
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/* is possible to load any of the glyphs contained within its parent */
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/* face. */
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/* */
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/* A glyph slot is created from a given face object. It is discarded */
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/* automatically by its parent face. */
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/* */
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typedef struct FT_GlyphSlotRec_* FT_GlyphSlot;
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/*************************************************************************/
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/* */
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/* <Type> */
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/* FT_CharMap */
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/* */
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/* <Description> */
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/* A handle to a given character map. A charmap is used to translate */
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/* character codes in a given encoding into glyph indexes for its */
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/* parent's face. Some font formats may provide several charmaps per */
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/* font. */
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/* */
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/* A charmap is created from a given face object. It is discarded */
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/* automatically by its parent face. */
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/* */
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typedef struct FT_CharMapRec_* FT_CharMap;
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/*************************************************************************/
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/* */
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/* <Enum> */
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/* FT_Encoding */
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/* */
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/* <Description> */
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/* An enumeration used to specify encodings supported by charmaps. */
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/* Used in the FT_Select_CharMap() API function. */
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/* */
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/* <Note> */
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/* Because of 32-bit charcodes defined in Unicode (i.e., surrogates), */
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/* all character codes must be expressed as FT_Longs. */
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/* */
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typedef enum FT_Encoding_
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{
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ft_encoding_none = 0,
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ft_encoding_symbol = 0,
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ft_encoding_unicode = FT_MAKE_TAG('u','n','i','c'),
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ft_encoding_latin_2 = FT_MAKE_TAG('l','a','t','2'),
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ft_encoding_sjis = FT_MAKE_TAG('s','j','i','s'),
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ft_encoding_big5 = FT_MAKE_TAG('b','i','g','5'),
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ft_encoding_adobe_standard = FT_MAKE_TAG('a','d','o','b'),
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ft_encoding_adobe_expert = FT_MAKE_TAG('a','d','b','e'),
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ft_encoding_adobe_custom = FT_MAKE_TAG('a','d','b','c'),
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ft_encoding_apple_roman = FT_MAKE_TAG('a','r','m','n')
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/* other encodings might be defined in the future */
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} FT_Encoding;
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/*************************************************************************/
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/* */
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/* <Struct> */
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/* FT_CharMapRec */
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/* */
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/* <Description> */
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/* The base charmap class. */
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/* */
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/* <Fields> */
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/* face :: A handle to the parent face object. */
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/* */
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/* flags :: A set of bit flags used to describe the charmap. */
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/* Each bit indicates that a given encoding is */
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/* supported. */
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/* */
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/* platform_id :: An ID number describing the platform for the */
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/* following encoding ID. This comes directly from */
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/* the TrueType specification and should be emulated */
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/* for other formats. */
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/* */
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/* encoding_id :: A platform specific encoding number. This also */
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/* comes from the TrueType specification and should be */
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/* emulated similarly. */
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/* */
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/* <Note> */
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/* We STRONGLY recommmend emulating a Unicode charmap for drivers */
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/* that do not support TrueType or OpenType. */
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/* */
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typedef struct FT_CharMapRec_
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{
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FT_Face face;
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FT_Encoding encoding;
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FT_UShort platform_id;
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FT_UShort encoding_id;
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} FT_CharMapRec;
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/*************************************************************************/
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/*************************************************************************/
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/* */
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/* B A S E O B J E C T C L A S S E S */
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/* */
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/*************************************************************************/
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/*************************************************************************/
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/*************************************************************************/
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/* */
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/* FreeType base face class */
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/* */
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/* <Struct> */
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/* FT_FaceRec */
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/* */
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/* <Description> */
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/* FreeType root face class structure. A face object models the */
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/* resolution and point-size independent data found in a font file. */
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/* */
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/* <Fields> */
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/* num_faces :: In the case where the face is located in a */
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/* collection (i.e., a resource which embeds */
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/* several faces), this is the total number of */
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/* faces found in the resource. 1 by default. */
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/* */
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/* face_index :: The index of the face in its resource. */
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/* Usually, this is 0 for all normal font */
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/* formats. It can be more in the case of */
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/* collections (which embed several fonts in a */
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/* single resource/file). */
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/* */
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/* face_flags :: A set of bit flags that give important */
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/* information about the face; see the */
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/* FT_FACE_FLAG_XXX macros for details. */
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/* */
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/* style_flags :: A set of bit flags indicating the style of */
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/* the face (i.e., italic, bold, underline, */
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/* etc). */
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/* */
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/* num_glyphs :: The total number of glyphs in the face. */
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/* */
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/* family_name :: The face's family name. This is an ASCII */
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/* string, usually in English, which describes */
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/* the typeface's family (like `Times New */
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/* Roman', `Bodoni', `Garamond', etc). This */
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/* is a least common denominator used to list */
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/* fonts. Some formats (TrueType & OpenType) */
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/* provide localized and Unicode versions of */
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/* this string. Applications should use the */
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/* format specific interface to access them. */
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/* */
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/* style_name :: The face's style name. This is an ASCII */
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/* string, usually in English, which describes */
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/* the typeface's style (like `Italic', */
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/* `Bold', `Condensed', etc). Not all font */
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/* formats provide a style name, so this field */
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/* is optional, and can be set to NULL. As */
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/* for `family_name', some formats provide */
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/* localized/Unicode versions of this string. */
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/* Applications should use the format specific */
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/* interface to access them. */
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/* */
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/* num_fixed_sizes :: The number of fixed sizes available in this */
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/* face. This should be set to 0 for scalable */
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/* fonts, unless its resource includes a */
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/* complete set of glyphs (called a `strike') */
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/* for the specified size. */
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/* */
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/* available_sizes :: An array of sizes specifying the available */
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/* bitmap/graymap sizes that are contained in */
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/* in the font resource. Should be set to */
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/* NULL if the field `num_fixed_sizes' is set */
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/* to 0. */
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/* */
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/* num_charmaps :: The total number of character maps in the */
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/* face. */
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/* */
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/* charmaps :: A table of pointers to the face's charmaps */
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/* Used to scan the list of available charmaps */
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/* this table might change after a call to */
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/* FT_Attach_File/Stream (e.g. when it used */
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/* to hook and additional encoding/CMap to */
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/* the face object). */
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/* */
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/* generic :: A field reserved for client uses. See the */
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/* FT_Generic type description. */
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/* */
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/* bbox :: The font bounding box. Coordinates are */
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/* expressed in font units (see units_per_EM). */
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/* The box is large enough to contain any */
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/* glyph from the font. Thus, bbox.yMax can */
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/* be seen as the `maximal ascender', */
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/* bbox.yMin as the `minimal descender', and */
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/* the maximum glyph width is given by */
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/* `bbox.xMax-bbox.xMin' (not to be confused */
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/* with the maximum _advance_width_). Only */
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/* relevant for scalable formats. */
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/* */
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/* units_per_EM :: The number of font units per EM square for */
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/* this face. This is typically 2048 for */
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/* TrueType fonts, 1000 for Type1 fonts, and */
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/* should be set to the (unrealistic) value 1 */
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/* for fixed-sizes fonts. Only relevant for */
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/* scalable formats. */
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/* */
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/* ascender :: The face's ascender is the vertical */
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/* distance from the baseline to the topmost */
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/* point of any glyph in the face. This */
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/* field's value is positive, expressed in */
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/* font units. Some font designs use a value */
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/* different from `bbox.yMax'. Only relevant */
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/* for scalable formats. */
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/* */
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/* descender :: The face's descender is the vertical */
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/* distance from the baseline to the */
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/* bottommost point of any glyph in the face. */
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/* This field's value is positive, expressed */
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/* in font units. Some font designs use a */
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/* value different from `-bbox.yMin'. Only */
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/* relevant for scalable formats. */
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/* */
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/* height :: The face's height is the vertical distance */
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/* from one baseline to the next when writing */
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/* several lines of text. Its value is always */
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/* positive, expressed in font units. The */
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/* value can be computed as */
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/* `ascender+descender+line_gap' where the */
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/* value of `line_gap' is also called */
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/* `external leading'. Only relevant for */
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/* scalable formats. */
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/* */
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/* max_advance_width :: The maximum advance width, in font units, */
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/* for all glyphs in this face. This can be */
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/* used to make word wrapping computations */
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/* faster. Only relevant for scalable */
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/* formats. */
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/* */
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/* max_advance_height :: The maximum advance height, in font units, */
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/* for all glyphs in this face. This is only */
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/* relevant for vertical layouts, and should */
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/* be set to the `height' for fonts that do */
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/* not provide vertical metrics. Only */
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/* relevant for scalable formats. */
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/* */
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/* underline_position :: The position, in font units, of the */
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/* underline line for this face. It's the */
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/* center of the underlining stem. Only */
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/* relevant for scalable formats. */
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/* */
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/* underline_thickness :: The thickness, in font units, of the */
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/* underline for this face. Only relevant for */
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/* scalable formats. */
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/* */
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/* driver :: A handle to the face's parent driver */
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/* object. */
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/* */
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/* memory :: A handle to the face's parent memory */
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/* object. Used for the allocation of */
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/* subsequent objects. */
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/* */
|
|
/* stream :: A handle to the face's stream. */
|
|
/* */
|
|
/* glyph :: The face's associated glyph slot(s). This */
|
|
/* object is created automatically with a new */
|
|
/* face object. However, certain kinds of */
|
|
/* applications (mainly tools like converters) */
|
|
/* can need more than one slot to ease their */
|
|
/* task. */
|
|
/* */
|
|
/* sizes_list :: The list of child sizes for this face. */
|
|
/* */
|
|
/* max_points :: The maximum number of points used to store */
|
|
/* the vectorial outline of any glyph in this */
|
|
/* face. If this value cannot be known in */
|
|
/* advance, or if the face isn't scalable, */
|
|
/* this should be set to 0. Only relevant for */
|
|
/* scalable formats. */
|
|
/* */
|
|
/* max_contours :: The maximum number of contours used to */
|
|
/* store the vectorial outline of any glyph in */
|
|
/* this face. If this value cannot be known */
|
|
/* in advance, or if the face isn't scalable, */
|
|
/* this should be set to 0. Only relevant for */
|
|
/* scalable formats. */
|
|
/* */
|
|
/* transform_matrix :: a 2x2 matrix of 16.16 coefficients used */
|
|
/* to transform glyph outlines after they're */
|
|
/* loaded from the font. Only used by the */
|
|
/* convenience functions. */
|
|
/* */
|
|
/* transform_delta :: a translation vector used to transform */
|
|
/* glyph outlines after they're loaded from */
|
|
/* the font. Only used by the convenience */
|
|
/* functions. */
|
|
/* */
|
|
/* transform_flags :: some flags used to classify the transform. */
|
|
/* Only used by the convenience functions. */
|
|
/* */
|
|
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;
|
|
|
|
/* the face's table of available charmaps */
|
|
FT_Int num_charmaps;
|
|
FT_CharMap* charmaps;
|
|
|
|
FT_Generic generic;
|
|
|
|
/* the following are only relevant for scalable outlines */
|
|
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;
|
|
|
|
/************************************************************/
|
|
/* The following fields should be considered private and */
|
|
/* rarely, if ever, used by client applications.. */
|
|
|
|
FT_Driver driver;
|
|
FT_Memory memory;
|
|
FT_Stream stream;
|
|
|
|
FT_GlyphSlot glyph;
|
|
FT_Size size;
|
|
FT_CharMap charmap;
|
|
FT_ListRec sizes_list;
|
|
|
|
void* extensions;
|
|
|
|
FT_UShort max_points;
|
|
FT_Short max_contours;
|
|
|
|
FT_Matrix transform_matrix;
|
|
FT_Vector transform_delta;
|
|
FT_Int transform_flags;
|
|
|
|
} FT_FaceRec;
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Constant> */
|
|
/* FT_FACE_FLAG_SCALABLE */
|
|
/* */
|
|
/* <Description> */
|
|
/* A bit-field constant, used to indicate that a given face provides */
|
|
/* vectorial outlines (i.e., TrueType or Type1). This doesn't */
|
|
/* prevent embedding of bitmap strikes though, i.e., a given face can */
|
|
/* have both this bit set, and a `num_fixed_sizes' property > 0. */
|
|
/* */
|
|
#define FT_FACE_FLAG_SCALABLE 1
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Constant> */
|
|
/* FT_FACE_FLAG_FIXED_WIDTH */
|
|
/* */
|
|
/* <Description> */
|
|
/* A bit-field constant, used to indicate that a given face contains */
|
|
/* fixed-width characters (like Courier, MonoType, etc). */
|
|
/* */
|
|
#define FT_FACE_FLAG_FIXED_WIDTH 4
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Constant> */
|
|
/* FT_FACE_FLAG_FIXED_WIDTH */
|
|
/* */
|
|
/* <Description> */
|
|
/* A bit-field constant, used to indicate that a given face contains */
|
|
/* `fixed sizes', i.e., bitmap strikes for some given pixel sizes. */
|
|
/* See the `num_fixed_sizes' and `available_sizes' face properties */
|
|
/* for more information. */
|
|
/* */
|
|
#define FT_FACE_FLAG_FIXED_SIZES 2
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Constant> */
|
|
/* FT_FACE_FLAG_SFNT */
|
|
/* */
|
|
/* <Description> */
|
|
/* A bit-field constant, used to indicate that a given face uses the */
|
|
/* `sfnt' storage fomat. For now, this means TrueType or OpenType. */
|
|
/* */
|
|
#define FT_FACE_FLAG_SFNT 8
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Constant> */
|
|
/* FT_FACE_FLAG_HORIZONTAL */
|
|
/* */
|
|
/* <Description> */
|
|
/* A bit-field constant, used to indicate that a given face contains */
|
|
/* horizontal glyph metrics. This should be set for all common */
|
|
/* formats, but who knows... */
|
|
/* */
|
|
#define FT_FACE_FLAG_HORIZONTAL 0x10
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Constant> */
|
|
/* FT_FACE_FLAG_VERTICAL */
|
|
/* */
|
|
/* <Description> */
|
|
/* A bit-field constant, used to indicate that a given face contains */
|
|
/* vertical glyph metrics. If not set, the glyph loader will */
|
|
/* synthetize vertical metrics itself to help display vertical text */
|
|
/* correctly. */
|
|
/* */
|
|
#define FT_FACE_FLAG_VERTICAL 0x20
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Constant> */
|
|
/* FT_FACE_FLAG_KERNING */
|
|
/* */
|
|
/* <Description> */
|
|
/* A bit-field constant, used to indicate that a given face contains */
|
|
/* kerning information. When set, this information can be retrieved */
|
|
/* through the function FT_Get_Kerning(). Note that when unset, this */
|
|
/* function will always return the kerning vector (0,0). */
|
|
/* */
|
|
#define FT_FACE_FLAG_KERNING 0x40
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Constant> */
|
|
/* FT_FACE_FLAG_FAST_GLYPHS */
|
|
/* */
|
|
/* <Description> */
|
|
/* A bit-field constant, used to indicate that the glyphs in a given */
|
|
/* font can be retrieved very quickly, and that a glyph cache is thus */
|
|
/* not necessary for any of its child size objects. */
|
|
/* */
|
|
/* This flag should really be set for fixed-size formats like FNT, */
|
|
/* where each glyph bitmap is available directly in binary form */
|
|
/* without any kind of compression. */
|
|
/* */
|
|
#define FT_FACE_FLAG_FAST_GLYPHS 0x80
|
|
|
|
|
|
#define FT_HAS_HORIZONTAL(face) (face->face_flags & FT_FACE_FLAG_HORIZONTAL)
|
|
#define FT_HAS_VERTICAL(face) (face->face_flags & FT_FACE_FLAG_VERTICAL)
|
|
#define FT_HAS_KERNING(face) (face->face_flags & FT_FACE_FLAG_KERNING)
|
|
#define FT_IS_SCALABLE(face) (face->face_flags & FT_FACE_FLAG_SCALABLE)
|
|
#define FT_IS_SFNT(face) (face->face_flags & FT_FACE_FLAG_SFNT)
|
|
#define FT_IS_FIXED_WIDTH(face) (face->face_flags & FT_FACE_FLAG_FIXED_WIDTH)
|
|
#define FT_HAS_FIXED_SIZES(face) (face->face_flags & FT_FACE_FLAG_FIXED_SIZES)
|
|
#define FT_HAS_FAST_GLYPHS(face) (face->face_flags & FT_FACE_FLAG_FAST_GLYPHS)
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Constant> */
|
|
/* FT_STYLE_FLAG_ITALIC */
|
|
/* */
|
|
/* <Description> */
|
|
/* A bit-field constant, used to indicate that a given face is */
|
|
/* italicized. */
|
|
/* */
|
|
#define FT_STYLE_FLAG_ITALIC 1
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Constant> */
|
|
/* FT_STYLE_FLAG_BOLD */
|
|
/* */
|
|
/* <Description> */
|
|
/* A bit-field constant, used to indicate that a given face is */
|
|
/* emboldened. */
|
|
/* */
|
|
#define FT_STYLE_FLAG_BOLD 2
|
|
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* FreeType base size metrics */
|
|
/* */
|
|
/* <Struct> */
|
|
/* FT_Size_Metrics */
|
|
/* */
|
|
/* <Description> */
|
|
/* The size metrics structure returned scaled important distances for */
|
|
/* a given size object. */
|
|
/* */
|
|
/* <Fields> */
|
|
/* pointSize :: The current point size in 26.6 points, where */
|
|
/* 1 point equals 1/72 inch. */
|
|
/* */
|
|
/* x_ppem :: The character width, expressed in integer pixels. */
|
|
/* This is the width of the EM square expressed in */
|
|
/* pixels, hence the term `ppem' (pixels per EM). */
|
|
/* */
|
|
/* y_ppem :: The character height, expressed in integer pixels. */
|
|
/* This is the height of the EM square expressed in */
|
|
/* pixels, hence the term `ppem' (pixels per EM). */
|
|
/* */
|
|
/* x_scale :: A simple 16.16 fixed point format coefficient used */
|
|
/* to scale horizontal distances expressed in font */
|
|
/* units to fractional (26.6) pixel coordinates. */
|
|
/* */
|
|
/* y_scale :: A simple 16.16 fixed point format coefficient used */
|
|
/* to scale vertical distances expressed in font */
|
|
/* units to fractional (26.6) pixel coordinates. */
|
|
/* */
|
|
/* x_resolution :: The horizontal device resolution for this size */
|
|
/* object, expressed in integer dots per inches */
|
|
/* (dpi). As a convention, fixed font formats set */
|
|
/* this value to 72. */
|
|
/* */
|
|
/* y_resolution :: The vertical device resolution for this size */
|
|
/* object, expressed in integer dots per inches */
|
|
/* (dpi). As a convention, fixed font formats set */
|
|
/* this value to 72. */
|
|
/* */
|
|
/* ascender :: The ascender, expressed in 26.6 fixed point */
|
|
/* pixels. Always positive. */
|
|
/* */
|
|
/* descender :: The descender, expressed in 26.6 fixed point */
|
|
/* pixels. Always positive. */
|
|
/* */
|
|
/* height :: The text height, expressed in 26.6 fixed point */
|
|
/* pixels. Always positive. */
|
|
/* */
|
|
/* max_advance :: Maximum horizontal advance, expressed in 26.6 */
|
|
/* fixed point pixels. Always positive. */
|
|
/* */
|
|
/* <Note> */
|
|
/* This structure doesn't return the vertical ascender, descender, */
|
|
/* and height, as well as a few other esoteric properties. One can */
|
|
/* however compute these through the size's x_scale and y_scale, */
|
|
/* applied to the relevant face properties. */
|
|
/* */
|
|
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; /* two scales used to convert font units */
|
|
FT_Fixed y_scale; /* to 26.6 frac. pixel coordinates.. */
|
|
|
|
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;
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* FreeType base size class */
|
|
/* */
|
|
/* <Struct> */
|
|
/* FT_SizeRec */
|
|
/* */
|
|
/* <Description> */
|
|
/* FreeType root size class structure. A size object models the */
|
|
/* resolution and pointsize dependent data of a given face. */
|
|
/* */
|
|
/* <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_SizeRec;
|
|
|
|
|
|
|
|
typedef struct FT_SubGlyph_ FT_SubGlyph;
|
|
|
|
struct FT_SubGlyph_
|
|
{
|
|
FT_Int index;
|
|
FT_UShort flags;
|
|
FT_Int arg1;
|
|
FT_Int arg2;
|
|
FT_Matrix transform;
|
|
};
|
|
|
|
|
|
#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
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* FreeType Glyph Slot base class */
|
|
/* */
|
|
/* <Struct> */
|
|
/* FT_GlyphSlotRec */
|
|
/* */
|
|
/* <Description> */
|
|
/* FreeType root glyph slot class structure. A glyph slot is a */
|
|
/* container where individual glyphs can be loaded, be they */
|
|
/* vectorial or bitmap/graymaps.. */
|
|
/* */
|
|
/* <Fields> */
|
|
/* 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. */
|
|
/* */
|
|
/* 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. */
|
|
/* */
|
|
/* metrics2 :: This field can be used to return alternate glyph */
|
|
/* metrics after a single load. It can contain either */
|
|
/* the glyph's metrics in font units, or the scaled but */
|
|
/* unhinted ones. See the load flags that apply when */
|
|
/* calling the API function FT_Load_Glyph(). */
|
|
/* */
|
|
/* 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. */
|
|
/* */
|
|
/* outline :: The outline descriptor for the current glyph, if it */
|
|
/* is a vectorial one. The nature of the last loaded */
|
|
/* glyph can be retrieved through the result value */
|
|
/* returned by FT_Load_Glyph(). */
|
|
/* */
|
|
/* bitmap :: The bitmap/graymap descriptor for the current glyph, */
|
|
/* if it is a fixed-width one. The nature of the last */
|
|
/* loaded glyph can be retrieved through the result value */
|
|
/* returned by FT_Load_Glyph(). */
|
|
/* */
|
|
/* */
|
|
|
|
enum
|
|
{
|
|
ft_glyph_own_bitmap = 1
|
|
};
|
|
|
|
typedef struct FT_GlyphSlotRec_
|
|
{
|
|
FT_Face face;
|
|
FT_GlyphSlot next;
|
|
FT_UInt flags;
|
|
|
|
FT_Glyph_Metrics metrics;
|
|
FT_Glyph_Metrics metrics2;
|
|
|
|
FT_Glyph_Format format;
|
|
FT_Bitmap bitmap;
|
|
FT_Outline outline;
|
|
|
|
FT_Int num_subglyphs;
|
|
FT_Int max_subglyphs;
|
|
FT_SubGlyph* subglyphs;
|
|
|
|
void* control_data;
|
|
long control_len;
|
|
|
|
void* other;
|
|
|
|
} FT_GlyphSlotRec;
|
|
|
|
|
|
/*************************************************************************/
|
|
/*************************************************************************/
|
|
/* */
|
|
/* F U N C T I O N S */
|
|
/* */
|
|
/*************************************************************************/
|
|
/*************************************************************************/
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Init_FreeType */
|
|
/* */
|
|
/* <Description> */
|
|
/* Initializes a new FreeType library object. The set of drivers */
|
|
/* that are registered by this function is determined at build time. */
|
|
/* */
|
|
/* <Output> */
|
|
/* library :: A handle to a new library object. */
|
|
/* */
|
|
/* <Return> */
|
|
/* Error code. 0 means success. */
|
|
/* */
|
|
EXPORT_DEF(FT_Error) FT_Init_FreeType( FT_Library* library );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Done_FreeType */
|
|
/* */
|
|
/* <Description> */
|
|
/* Destroys a given FreeType library object, and all of its childs, */
|
|
/* including resources, drivers, faces, sizes, etc. */
|
|
/* */
|
|
/* <Input> */
|
|
/* library :: A handle to a target library object. */
|
|
/* */
|
|
/* <Return> */
|
|
/* Error code. 0 means success. */
|
|
/* */
|
|
EXPORT_DEF(FT_Error) FT_Done_FreeType( FT_Library library );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Open_Flags */
|
|
/* */
|
|
/* <Description> */
|
|
/* An enumeration used to list the bit flags used within FT_Open_Args */
|
|
/* */
|
|
/* <Fields> */
|
|
/* 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 pathname */
|
|
/* ft_open_driver :: use the "driver" field */
|
|
/* ft_open_params :: use the "num_params" & "params" field */
|
|
/* */
|
|
typedef enum {
|
|
|
|
ft_open_memory = 1,
|
|
ft_open_stream = 2,
|
|
ft_open_pathname = 4,
|
|
ft_open_driver = 8,
|
|
ft_open_params = 16
|
|
|
|
} FT_Open_Flags;
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Parameter */
|
|
/* */
|
|
/* <Description> */
|
|
/* A simple structure used to pass more or less generic parameters */
|
|
/* to FT_Open_Face.. */
|
|
/* */
|
|
/* <Fields> */
|
|
/* tag :: 4-byte identification tag */
|
|
/* data :: pointer to parameter data */
|
|
/* */
|
|
/* <Note> */
|
|
/* the id and role of parameters is 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/stream.
|
|
* A pointer to such a structure can be used as a parameter for the
|
|
* function FT_Open_Face & FT_Attach_Stream.
|
|
*
|
|
* <Fields>
|
|
* flags :: set of bit flags indicating how to use the structure
|
|
*
|
|
* memory_base :: first byte of file in memory
|
|
* memory_size :: size in bytes of file in memory
|
|
*
|
|
* pathname :: a pointer to an 8-bit file pathname
|
|
*
|
|
* stream :: 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 will try to load
|
|
* the face with each one of the drivers in its list.
|
|
*
|
|
* num_params :: number of parameters
|
|
* params :: extra parameters passed to the font driver when
|
|
* opening a new face
|
|
*
|
|
* <Note>
|
|
* The stream_type determines which fields are used to create a new
|
|
* input stream.
|
|
*
|
|
* If it is ft_stream_memory, a new memory-based stream will be created
|
|
* using the memory block specified by "memory_base" and "memory_size"
|
|
*
|
|
* If it is ft_stream_pathname, a new stream will be created with the
|
|
* "pathname" field, calling the system-specific FT_New_Stream function
|
|
*
|
|
* It is is ft_stream_copy, then the content of "stream" will be copied
|
|
* to a new input stream object. The object will be closed and destroyed
|
|
* when the face is destroyed itself.. Note that this means that you
|
|
* should not close the stream before the library does !!
|
|
*
|
|
*************************************************************************/
|
|
|
|
typedef struct FT_Open_Args_
|
|
{
|
|
FT_Open_Flags flags;
|
|
FT_Byte* memory_base;
|
|
FT_Long memory_size;
|
|
FT_String* pathname;
|
|
FT_Stream stream;
|
|
FT_Driver driver;
|
|
FT_Int num_params;
|
|
FT_Parameter* params;
|
|
|
|
} FT_Open_Args;
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_New_Face */
|
|
/* */
|
|
/* <Description> */
|
|
/* Creates a new face object from a given font file and typeface */
|
|
/* index. */
|
|
/* */
|
|
/* <Input> */
|
|
/* library :: handle to the root FreeType library instance */
|
|
/* */
|
|
/* filepathname :: an 8-bit pathname naming the font file */
|
|
/* */
|
|
/* face_index :: the index of the face within the font file. */
|
|
/* The first face has index 0. */
|
|
/* <Output> */
|
|
/* face :: A handle to a new face object. */
|
|
/* */
|
|
/* <Return> */
|
|
/* Error code. 0 means success. */
|
|
/* */
|
|
/* <Note> */
|
|
/* If your font file is in memory, or if you want to provide your */
|
|
/* own input stream object, see FT_Open_Face below. */
|
|
/* */
|
|
/* FT_New_Face creates a new stream object. The stream will be */
|
|
/* closed with the face (when calling FT_Done_Face or even */
|
|
/* FT_Done_FreeType). */
|
|
/* */
|
|
/* Unlike FreeType 1.1, this function automatically creates a glyph */
|
|
/* slot for the face object which can be accessed directly through */
|
|
/* `face->slot'. Note that additional slots can be added to each face */
|
|
/* through the FT_New_GlyphSlot() API function. Slots are linked in */
|
|
/* a single list through their `next' field. */
|
|
/* */
|
|
EXPORT_DEF(FT_Error) FT_New_Face( FT_Library library,
|
|
const char* filepathname,
|
|
FT_Long face_index,
|
|
FT_Face* face );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_New_Memory_Face */
|
|
/* */
|
|
/* <Description> */
|
|
/* Creates a new face object from a given resource and typeface index */
|
|
/* using a font file already 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 resource. The */
|
|
/* first face has index 0. */
|
|
/* <Output> */
|
|
/* face :: A handle to a new face object. */
|
|
/* */
|
|
/* <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'. */
|
|
/* */
|
|
/* Note that additional slots can be added to each face with the */
|
|
/* FT_New_GlyphSlot() API function. Slots are linked in a single */
|
|
/* list through their `next' field. */
|
|
/* */
|
|
/* FT_New_Memory_Face() can be used to determine and/or check the */
|
|
/* font format of a given font resource. If the `face_index' field */
|
|
/* is negative, the function will _not_ return any face handle in */
|
|
/* `*face'. Its return value should be 0 if the resource is */
|
|
/* recognized, or non-zero if not. */
|
|
/* */
|
|
EXPORT_DEF(FT_Error) FT_New_Memory_Face( FT_Library library,
|
|
void* file_base,
|
|
FT_Long file_size,
|
|
FT_Long face_index,
|
|
FT_Face* face );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Open_Face */
|
|
/* */
|
|
/* <Description> */
|
|
/* Creates a new face object from a given input stream & typeface */
|
|
/* index. This function is very similar to FT_New_Face, except that */
|
|
/* it can accept any form of input stream.. */
|
|
/* */
|
|
/* <Input> */
|
|
/* library :: handle to the root FreeType library instance */
|
|
/* */
|
|
/* args :: an FT_Open_Args structure used to describe the */
|
|
/* input stream to FreeType. */
|
|
/* */
|
|
/* face_index :: the index of the face within the font file. */
|
|
/* The first face has index 0. */
|
|
/* <Output> */
|
|
/* face :: A handle to a new face object. */
|
|
/* */
|
|
/* <Return> */
|
|
/* Error code. 0 means success. */
|
|
/* */
|
|
/* <Note> */
|
|
/* Note that if the stream is in-memory or specified through an */
|
|
/* 8-bit pathname, a new stream is created by this function. It */
|
|
/* is only closed when the face is destroyed (FT_Done_Face). */
|
|
/* */
|
|
/* Note that when specifying directly an existing FT_Stream, this */
|
|
/* function creates a new FT_Stream object and copies the contents */
|
|
/* of the original stream within it. The stream will be closed */
|
|
/* when the face is destroyed. This means calling the stream's */
|
|
/* "close" function. */
|
|
/* */
|
|
EXPORT_DEF(FT_Error) FT_Open_Face( FT_Library library,
|
|
FT_Open_Args* args,
|
|
FT_Long face_index,
|
|
FT_Face* face );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Attach_File */
|
|
/* */
|
|
/* <Description> */
|
|
/* "Attach" a given font file to an existing face. This is usually */
|
|
/* to read additionnal information for a single face object. For */
|
|
/* example, it is used to read the AFM files that come with Type 1 */
|
|
/* fonts in order to add kerning data and other metrics.. */
|
|
/* */
|
|
/* <Input> */
|
|
/* face :: target face object */
|
|
/* */
|
|
/* filepathname :: an 8-bit pathname naming the 'metrics' file. */
|
|
/* */
|
|
/* <Return> */
|
|
/* Error code. 0 means success. */
|
|
/* */
|
|
/* <Note> */
|
|
/* If your font file is in memory, or if you want to provide your */
|
|
/* own input stream object, see FT_Attach_Stream. */
|
|
/* */
|
|
/* 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're doing */
|
|
/* when invoking this function. Most drivers simply do not implement */
|
|
/* file attachments.. */
|
|
/* */
|
|
EXPORT_DEF(FT_Error) FT_Attach_File( FT_Face face,
|
|
const char* filepathname );
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Attach_Stream */
|
|
/* */
|
|
/* <Description> */
|
|
/* This function is similar to FT_Attach_File with the exception */
|
|
/* that it reads the attachment from an arbitrary stream. */
|
|
/* */
|
|
/* <Input> */
|
|
/* face :: target face object */
|
|
/* */
|
|
/* args :: a pointer to an FT_Open_Args structure used to describe */
|
|
/* the input stream to FreeType */
|
|
/* <Return> */
|
|
/* Error code. 0 means success. */
|
|
/* */
|
|
/* The meaning of the "attach" (i.e. what really happens when the */
|
|
/* new file is read) is not fixed by FreeType itself. It really */
|
|
/* depends on the font format (and thus the font driver). */
|
|
/* */
|
|
/* Client applications are expected to know what they're doing */
|
|
/* when invoking this function. Most drivers simply do not implement */
|
|
/* file attachments.. */
|
|
/* */
|
|
EXPORT_DEF(FT_Error) FT_Attach_Stream( FT_Face face,
|
|
FT_Open_Args* parameters );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Done_Face */
|
|
/* */
|
|
/* <Description> */
|
|
/* Discards a given face object, as well as all of its child slots */
|
|
/* and sizes. */
|
|
/* */
|
|
/* <Input> */
|
|
/* face :: A handle to a target face object. */
|
|
/* */
|
|
/* <Return> */
|
|
/* Error code. 0 means success. */
|
|
/* */
|
|
EXPORT_DEF(FT_Error) FT_Done_Face( FT_Face face );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Set_Char_Size */
|
|
/* */
|
|
/* <Description> */
|
|
/* Sets the character dimensions of a given size object. The */
|
|
/* `char_size' value is used for the width and height, expressed in */
|
|
/* 26.6 fractional points. 1 point = 1/72 inch. */
|
|
/* */
|
|
/* <Input> */
|
|
/* size :: A handle to a target size object. */
|
|
/* char_size :: The character size, in 26.6 fractional points. */
|
|
/* */
|
|
/* <Return> */
|
|
/* Error code. 0 means success. */
|
|
/* */
|
|
/* <Note> */
|
|
/* When dealing with fixed-size faces (i.e., non-scalable formats), */
|
|
/* use the function FT_Set_Pixel_Sizes(). */
|
|
/* */
|
|
EXPORT_DEF(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> */
|
|
/* Sets the character dimensions of a given size object. The width */
|
|
/* and height are expressed in integer pixels. */
|
|
/* */
|
|
/* <Input> */
|
|
/* size :: A handle to a target size object. */
|
|
/* pixel_width :: The character width, in integer pixels. */
|
|
/* pixel_height :: The character height, in integer pixels. */
|
|
/* */
|
|
/* <Return> */
|
|
/* Error code. 0 means success. */
|
|
/* */
|
|
EXPORT_DEF(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 within a given glyph slot, */
|
|
/* for a given size. */
|
|
/* */
|
|
/* <Input> */
|
|
/* face :: A handle to the target face object where the glyph */
|
|
/* will be loaded. */
|
|
/* */
|
|
/* glyph_index :: The index of the glyph in the font file. */
|
|
/* */
|
|
/* 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. */
|
|
/* */
|
|
EXPORT_DEF(FT_Error) FT_Load_Glyph( FT_Face face,
|
|
FT_UInt glyph_index,
|
|
FT_Int load_flags );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Load_Char */
|
|
/* */
|
|
/* <Description> */
|
|
/* A function used to load a single glyph within a given glyph slot, */
|
|
/* for a given size, according to its character code ! */
|
|
/* */
|
|
/* <Input> */
|
|
/* face :: A handle to a target face object where the glyph */
|
|
/* will be loaded. */
|
|
/* */
|
|
/* char_code :: The glyph's character code, according to the */
|
|
/* current charmap used in the face. */
|
|
/* */
|
|
/* load_flags :: A flag indicating what to load for this glyph. The */
|
|
/* FT_LOAD_XXX constants can be used to control the */
|
|
/* glyph loading process (e.g., whether the outline */
|
|
/* should be scaled, whether to load bitmaps or not, */
|
|
/* whether to hint the outline, etc). */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
/* <Note> */
|
|
/* If the face has no current charmap, or if the character code */
|
|
/* is not defined in the charmap, this function will return an */
|
|
/* error.. */
|
|
/* */
|
|
EXPORT_DEF(FT_Error) FT_Load_Char( FT_Face face,
|
|
FT_ULong char_code,
|
|
FT_Int load_flags );
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Constant> */
|
|
/* FT_LOAD_NO_SCALE */
|
|
/* */
|
|
/* <Description> */
|
|
/* A bit field constant, used with FT_Load_Glyph() to indicate that */
|
|
/* the vector outline being loaded should not be scaled to 26.6 */
|
|
/* fractional pixels, but kept in notional units. */
|
|
/* */
|
|
#define FT_LOAD_NO_SCALE 1
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Constant> */
|
|
/* FT_LOAD_NO_HINTING */
|
|
/* */
|
|
/* <Description> */
|
|
/* A bit-field constant, used with FT_Load_Glyph() to indicate that */
|
|
/* the vector outline being loaded should not be fitted to the pixel */
|
|
/* grid but simply scaled to 26.6 fractional pixels. */
|
|
/* */
|
|
/* This flag is ignored when FT_LOAD_NO_SCALE is set. */
|
|
/* */
|
|
#define FT_LOAD_NO_HINTING 2
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Constant> */
|
|
/* FT_LOAD_NO_OUTLINE */
|
|
/* */
|
|
/* <Description> */
|
|
/* A bit-field constant, used with FT_Load_Glyph() to indicate that */
|
|
/* the function should not load the vector outline of a given glyph. */
|
|
/* If an embedded bitmap exists for the glyph in the font, it will be */
|
|
/* loaded, otherwise nothing is returned and an error is produced. */
|
|
/* */
|
|
#define FT_LOAD_NO_OUTLINE 4
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Constant> */
|
|
/* FT_LOAD_NO_BITMAP */
|
|
/* */
|
|
/* <Description> */
|
|
/* A bit-field constant, used with FT_Load_Glyph() to indicate that */
|
|
/* the function should not load the bitmap or pixmap of a given */
|
|
/* glyph. If an outline exists for the glyph in the font, it is */
|
|
/* loaded, otherwise nothing is returned and an error is produced. */
|
|
/* */
|
|
#define FT_LOAD_NO_BITMAP 8
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Constant> */
|
|
/* FT_LOAD_LINEAR */
|
|
/* */
|
|
/* <Description> */
|
|
/* A bit-field constant, used with FT_Load_Glyph() to indicate that */
|
|
/* the function should return the linearly scaled metrics for the */
|
|
/* glyph in `slot->metrics2' (these metrics are not grid-fitted). */
|
|
/* Otherwise, `metrics2' gives the original font units values. */
|
|
/* */
|
|
#define FT_LOAD_LINEAR 16
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Constant> */
|
|
/* FT_LOAD_FORCE_AUTOHINT */
|
|
/* */
|
|
/* <Description> */
|
|
/* A bit-field constant, used with FT_Load_Glyph() to indicate that */
|
|
/* the function should try to auto-hint the glyphs, even if a driver- */
|
|
/* -specific hinter is available.. */
|
|
/* */
|
|
#define FT_LOAD_FORCE_AUTOHINT 32
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Constant> */
|
|
/* FT_LOAD_PEDANTIC */
|
|
/* */
|
|
/* <Description> */
|
|
/* A bit-field constant, used with FT_Load_Glyph() to indicate that */
|
|
/* the glyph loader should perform a pedantic bytecode. */
|
|
/* interpretation. Many popular fonts come with broken glyph */
|
|
/* programs. When this flag is set, loading them will return an */
|
|
/* error. Otherwise, errors are ignored by the loader, sometimes */
|
|
/* resulting in ugly glyphs. */
|
|
/* */
|
|
#define FT_LOAD_PEDANTIC 128
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Constant> */
|
|
/* FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH */
|
|
/* */
|
|
/* <Description> */
|
|
/* A bit-field constant, used with FT_Load_Glyph() to indicate that */
|
|
/* the glyph loader should ignore the global advance width defined */
|
|
/* in the font. As far as we know, this is only used by the */
|
|
/* X-TrueType font server, in order to deal correctly with the */
|
|
/* incorrect metrics contained in DynaLab's TrueType CJK fonts.. */
|
|
/* */
|
|
#define FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH 512
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Constant> */
|
|
/* FT_LOAD_NO_RECURSE */
|
|
/* */
|
|
/* <Description> */
|
|
/* A bit-field constant, used with FT_Load_Glyph() to indicate that */
|
|
/* the glyph loader should not load composite glyph recursively. */
|
|
/* Rather, when a composite glyph is encountered, it should set */
|
|
/* the values of `num_subglyphs' and `subglyphs', as well as set */
|
|
/* `face->glyph.format' to ft_glyph_format_composite. */
|
|
/* */
|
|
/* This is for use by the auto-hinter and possibly other tools */
|
|
/* For nearly all applications, this flags should be left unset */
|
|
/* when invoking FT_Load_Glyph(). */
|
|
/* */
|
|
/* Note that the flag forces the load of unscaled glyphs */
|
|
/* */
|
|
#define FT_LOAD_NO_RECURSE 1024
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Constant> */
|
|
/* FT_LOAD_DEFAULT */
|
|
/* */
|
|
/* <Description> */
|
|
/* A bit-field constant, used with FT_Load_Glyph() to indicate that */
|
|
/* the function should try to load the glyph normally, i.e., */
|
|
/* embedded bitmaps are favored over outlines, vectors are always */
|
|
/* scaled and grid-fitted. */
|
|
/* */
|
|
#define FT_LOAD_DEFAULT 0
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Get_Kerning */
|
|
/* */
|
|
/* <Description> */
|
|
/* Returns 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. */
|
|
/* */
|
|
/* <Output> */
|
|
/* kerning :: The kerning vector. This is in font units 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. */
|
|
/* */
|
|
EXPORT_DEF(FT_Error) FT_Get_Kerning( FT_Face face,
|
|
FT_UInt left_glyph,
|
|
FT_UInt right_glyph,
|
|
FT_Vector* kerning );
|
|
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Select_Charmap */
|
|
/* */
|
|
/* <Description> */
|
|
/* Selects a given charmap by its encoding tag. */
|
|
/* */
|
|
/* <Input> */
|
|
/* face :: A handle to the source face object. */
|
|
/* encoding :: handle to the selected charmap */
|
|
/* */
|
|
/* <Return> */
|
|
/* Error code. 0 means success. */
|
|
/* */
|
|
/* <Note> */
|
|
/* This function will return an error if no charmap in the face */
|
|
/* corresponds to the encoding queried here */
|
|
/* */
|
|
EXPORT_DEF(FT_Error) FT_Select_Charmap( FT_Face face,
|
|
FT_Encoding encoding );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Set_Charmap */
|
|
/* */
|
|
/* <Description> */
|
|
/* Selects a given charmap for character code to glyph index */
|
|
/* decoding. */
|
|
/* */
|
|
/* <Input> */
|
|
/* face :: A handle to the source face object. */
|
|
/* charmap :: handle to the selected charmap */
|
|
/* */
|
|
/* <Return> */
|
|
/* Error code. 0 means success. */
|
|
/* */
|
|
/* <Note> */
|
|
/* this function will return an error when the charmap is not part */
|
|
/* of the face (i.e. if it is not listed in the face->charmaps[] */
|
|
/* table). */
|
|
/* */
|
|
EXPORT_DEF(FT_Error) FT_Set_Charmap( FT_Face face,
|
|
FT_CharMap charmap );
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Get_Char_Index */
|
|
/* */
|
|
/* <Description> */
|
|
/* Returns the glyph index of a given character code. This function */
|
|
/* uses a charmap object to do the translation. */
|
|
/* */
|
|
/* <Input> */
|
|
/* charmap :: A handle to a filter charmap object. */
|
|
/* charcode :: The character code. */
|
|
/* */
|
|
/* <Return> */
|
|
/* The glyph index. 0 means `undefined character code'. */
|
|
/* */
|
|
EXPORT_DEF(FT_UInt) FT_Get_Char_Index( FT_Face face,
|
|
FT_ULong charcode );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_MulDiv */
|
|
/* */
|
|
/* <Description> */
|
|
/* A very simple function used to perform the computation `(A*B)/C' */
|
|
/* with maximum accuracy (it uses a 64-bit intermediate integer */
|
|
/* whenever necessary). */
|
|
/* */
|
|
/* This function isn't necessarily as fast as some processor specific */
|
|
/* operations, but is at least completely portable. */
|
|
/* */
|
|
/* <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'. */
|
|
/* */
|
|
EXPORT_DEF(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 maximum 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 2.0 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. */
|
|
/* */
|
|
EXPORT_DEF(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 maximum 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 optimisation for FT_DivFix() is simple : if (a << 16) fits */
|
|
/* in 32 bits, then the division is computed directly. Otherwise, */
|
|
/* we use a specialised version of the old FT_MulDiv64 */
|
|
/* */
|
|
EXPORT_DEF(FT_Long) FT_DivFix( FT_Long a,
|
|
FT_Long b );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Outline_Get_Bitmap */
|
|
/* */
|
|
/* <Description> */
|
|
/* Renders an outline within a bitmap. The outline's image is simply */
|
|
/* or-ed to the target bitmap. */
|
|
/* */
|
|
/* */
|
|
/* <Input> */
|
|
/* library :: A handle to a FreeType library object. */
|
|
/* outline :: A pointer to the source outline descriptor. */
|
|
/* map :: A pointer to the target bitmap descriptor. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
/* <MT-Note> */
|
|
/* YES. Rendering is synchronized, so that concurrent calls to the */
|
|
/* scan-line converter will be serialized. */
|
|
/* */
|
|
/* <Note> */
|
|
/* This function does NOT CREATE the bitmap, it only renders an */
|
|
/* outline image within the one you pass to it! */
|
|
/* */
|
|
/* It will use the raster correponding to the default glyph format. */
|
|
/* */
|
|
EXPORT_DEF(FT_Error) FT_Outline_Get_Bitmap( FT_Library library,
|
|
FT_Outline* outline,
|
|
FT_Bitmap* map );
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Outline_Render */
|
|
/* */
|
|
/* <Description> */
|
|
/* Renders an outline within a bitmap using the current scan-convert */
|
|
/* This functions uses a FT_Raster_Params as argument, allowing */
|
|
/* advanced features like direct composition/translucency, etc.. */
|
|
/* */
|
|
/* <Input> */
|
|
/* library :: A handle to a FreeType library object. */
|
|
/* outline :: A pointer to the source outline descriptor. */
|
|
/* params :: A pointer to a FT_Raster_Params used to describe */
|
|
/* the rendering operation */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
/* <MT-Note> */
|
|
/* YES. Rendering is synchronized, so that concurrent calls to the */
|
|
/* scan-line converter will be serialized. */
|
|
/* */
|
|
/* <Note> */
|
|
/* You should know what you're doing and the role of FT_Raster_Params */
|
|
/* to use this function. */
|
|
/* */
|
|
/* the field "params.source" will be set to "outline" before the */
|
|
/* scan converter is called, which means that the value you give it */
|
|
/* is actually ignored.. */
|
|
/* */
|
|
EXPORT_DEF(FT_Error) FT_Outline_Render( FT_Library library,
|
|
FT_Outline* outline,
|
|
FT_Raster_Params* params );
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Outline_Decompose */
|
|
/* */
|
|
/* <Description> */
|
|
/* Walks over an outline's structure to decompose it into individual */
|
|
/* segments and Bezier arcs. This function is also able to emit */
|
|
/* `move to' and `close to' operations to indicate the start and end */
|
|
/* of new contours in the outline. */
|
|
/* */
|
|
/* <Input> */
|
|
/* outline :: A pointer to the source target. */
|
|
/* */
|
|
/* funcs :: A table of `emitters', i.e,. function pointers called */
|
|
/* during decomposition to indicate path operations. */
|
|
/* */
|
|
/* user :: A typeless pointer which is passed to each emitter */
|
|
/* during the decomposition. It can be used to store */
|
|
/* the state during the decomposition. */
|
|
/* */
|
|
/* <Return> */
|
|
/* Error code. 0 means sucess. */
|
|
/* */
|
|
EXPORT_DEF(int) FT_Outline_Decompose( FT_Outline* outline,
|
|
FT_Outline_Funcs* funcs,
|
|
void* user );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Outline_New */
|
|
/* */
|
|
/* <Description> */
|
|
/* Creates a new outline of a given size. */
|
|
/* */
|
|
/* <Input> */
|
|
/* library :: A handle to the library object from where the */
|
|
/* outline is allocated. Note however that the new */
|
|
/* outline will NOT necessarily be FREED when */
|
|
/* destroying the library, by FT_Done_FreeType(). */
|
|
/* */
|
|
/* numPoints :: The maximum number of points within the outline. */
|
|
/* */
|
|
/* numContours :: The maximum number of contours within the outline. */
|
|
/* */
|
|
/* <Output> */
|
|
/* outline :: A handle to the new outline. NULL in case of */
|
|
/* error. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
/* <MT-Note> */
|
|
/* No. */
|
|
/* */
|
|
/* <Note> */
|
|
/* The reason why this function takes a `library' parameter is simply */
|
|
/* to use the library's memory allocator. You can copy the source */
|
|
/* code of this function, replacing allocations with `malloc()' if */
|
|
/* you want to control where the objects go. */
|
|
/* */
|
|
EXPORT_DEF(FT_Error) FT_Outline_New( FT_Library library,
|
|
FT_UInt numPoints,
|
|
FT_Int numContours,
|
|
FT_Outline* outline );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Outline_Done */
|
|
/* */
|
|
/* <Description> */
|
|
/* Destroys an outline created with FT_Outline_New(). */
|
|
/* */
|
|
/* <Input> */
|
|
/* library :: A handle of the library object used to allocate the */
|
|
/* outline. */
|
|
/* */
|
|
/* outline :: A pointer to the outline object to be discarded. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
/* <MT-Note> */
|
|
/* No. */
|
|
/* */
|
|
/* <Note> */
|
|
/* If the outline's `owner' field is not set, only the outline */
|
|
/* descriptor will be released. */
|
|
/* */
|
|
/* The reason why this function takes an `outline' parameter is */
|
|
/* simply to use FT_Alloc()/FT_Free(). You can copy the source code */
|
|
/* of this function, replacing allocations with `malloc()' in your */
|
|
/* application if you want something simpler. */
|
|
/* */
|
|
EXPORT_DEF(FT_Error) FT_Outline_Done( FT_Library library,
|
|
FT_Outline* outline );
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Outline_Get_CBox */
|
|
/* */
|
|
/* <Description> */
|
|
/* Returns an outline's `control box'. The control box encloses all */
|
|
/* the outline's points, including Bezier control points. Though it */
|
|
/* coincides with the exact bounding box for most glyphs, it can be */
|
|
/* slightly larger in some situations (like when rotating an outline */
|
|
/* which contains Bezier outside arcs). */
|
|
/* */
|
|
/* Computing the control box is very fast, while getting the bounding */
|
|
/* box can take much more time as it needs to walk over all segments */
|
|
/* and arcs in the outline. To get the latter, you can use the */
|
|
/* `ftbbox' component which is dedicated to this single task. */
|
|
/* */
|
|
/* <Input> */
|
|
/* outline :: A pointer to the source outline descriptor. */
|
|
/* */
|
|
/* <Output> */
|
|
/* cbox :: The outline's control box. */
|
|
/* */
|
|
/* <MT-Note> */
|
|
/* Yes. */
|
|
/* */
|
|
EXPORT_DEF(void) FT_Outline_Get_CBox( FT_Outline* outline,
|
|
FT_BBox* cbox );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Outline_Translate */
|
|
/* */
|
|
/* <Description> */
|
|
/* Applies a simple translation to the points of an outline. */
|
|
/* */
|
|
/* <Input> */
|
|
/* outline :: A pointer to the target outline descriptor. */
|
|
/* xOffset :: The horizontal offset. */
|
|
/* yOffset :: The vertical offset. */
|
|
/* */
|
|
/* <MT-Note> */
|
|
/* Yes. */
|
|
/* */
|
|
EXPORT_DEF(void) FT_Outline_Translate( FT_Outline* outline,
|
|
FT_Pos xOffset,
|
|
FT_Pos yOffset );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Set_Raster */
|
|
/* */
|
|
/* <Description> */
|
|
/* Register a given raster to the library. */
|
|
/* */
|
|
/* <Input> */
|
|
/* library :: A handle to a target library object. */
|
|
/* raster_funcs :: pointer to the raster's interface */
|
|
/* */
|
|
/* <Return> */
|
|
/* Error code. 0 means success. */
|
|
/* */
|
|
/* <Note> */
|
|
/* This function will do the following: */
|
|
/* */
|
|
/* - a new raster object is created through raster_func.raster_new */
|
|
/* if this fails, then the function returns */
|
|
/* */
|
|
/* - if a raster is already registered for the glyph format */
|
|
/* specified in raster_funcs, it will be destroyed */
|
|
/* */
|
|
/* - the new raster is registered for the glyph format */
|
|
/* */
|
|
EXPORT_DEF(FT_Error) FT_Set_Raster( FT_Library library,
|
|
FT_Raster_Funcs* raster_funcs );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Unset_Raster */
|
|
/* */
|
|
/* <Description> */
|
|
/* Removes a given raster from the library. */
|
|
/* */
|
|
/* <Input> */
|
|
/* library :: A handle to a target library object. */
|
|
/* raster_funcs :: pointer to the raster's interface */
|
|
/* */
|
|
/* <Return> */
|
|
/* Error code. 0 means success. */
|
|
/* */
|
|
/* <Note> */
|
|
/* This function should never be used by a normal client application */
|
|
/* as FT_Set_Raster unregisters the previous raster for a given */
|
|
/* glyph format.. */
|
|
/* */
|
|
EXPORT_DEF(FT_Error) FT_Unset_Raster( FT_Library library,
|
|
FT_Raster_Funcs* raster_funcs );
|
|
|
|
|
|
/*************************************************************************
|
|
*
|
|
* <Function>
|
|
* FT_Get_Raster
|
|
*
|
|
* <Description>
|
|
* Return a pointer to the raster corresponding to a given glyph
|
|
* format tag.
|
|
*
|
|
* <Input>
|
|
* library :: handle to source library object
|
|
* glyph_format :: glyph format tag
|
|
*
|
|
* <Output>
|
|
* raster_funcs :: if this field is not 0, returns a pointer to the
|
|
* raster's interface/descriptor..
|
|
*
|
|
* <Return>
|
|
* a pointer to the corresponding raster object.
|
|
*
|
|
*************************************************************************/
|
|
|
|
EXPORT_DEF(FT_Raster) FT_Get_Raster( FT_Library library,
|
|
FT_Glyph_Format glyph_format,
|
|
FT_Raster_Funcs *raster_funcs );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Set_Raster_Mode */
|
|
/* */
|
|
/* <Description> */
|
|
/* Set a raster-specific mode. */
|
|
/* */
|
|
/* <Input> */
|
|
/* library :: A handle to a target library object. */
|
|
/* format :: the glyph format used to select the raster */
|
|
/* mode :: the raster-specific mode descriptor */
|
|
/* args :: the mode arguments */
|
|
/* <Return> */
|
|
/* Error code. 0 means success. */
|
|
/* */
|
|
EXPORT_DEF(FT_Error) FT_Set_Raster_Mode( FT_Library library,
|
|
FT_Glyph_Format format,
|
|
unsigned long mode,
|
|
void* args );
|
|
|
|
|
|
/***************************************************************************/
|
|
/***************************************************************************/
|
|
/***************************************************************************/
|
|
/***** *****/
|
|
/***** C O N V E N I E N C E F U N C T I O N S *****/
|
|
/***** *****/
|
|
/***** *****/
|
|
/***** The following functions are provided as a convenience *****/
|
|
/***** to client applications. However, their compilation might *****/
|
|
/***** be discarded if FT_CONFIG_OPTION_NO_CONVENIENCE_FUNCS *****/
|
|
/***** is defined in "config/ftoption.h". *****/
|
|
/***** *****/
|
|
/***************************************************************************/
|
|
/***************************************************************************/
|
|
/***************************************************************************/
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Outline_Copy */
|
|
/* */
|
|
/* <Description> */
|
|
/* Copies an outline into another one. Both objects must have the */
|
|
/* same sizes (number of points & number of contours) when this */
|
|
/* function is called. */
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|
/* */
|
|
/* <Input> */
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|
/* source :: A handle to the source outline. */
|
|
/* target :: A handle to the target outline. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
EXPORT_DEF(FT_Error) FT_Outline_Copy( FT_Outline* source,
|
|
FT_Outline* target );
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|
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Outline_Transform */
|
|
/* */
|
|
/* <Description> */
|
|
/* Applies a simple 2x2 matrix to all of an outline's points. Useful */
|
|
/* for applying rotations, slanting, flipping, etc. */
|
|
/* */
|
|
/* <Input> */
|
|
/* outline :: A pointer to the target outline descriptor. */
|
|
/* matrix :: A pointer to the transformation matrix. */
|
|
/* */
|
|
/* <MT-Note> */
|
|
/* Yes. */
|
|
/* */
|
|
/* <Note> */
|
|
/* You can use FT_Outline_Translate() if you need to translate the */
|
|
/* outline's points. */
|
|
/* */
|
|
EXPORT_DEF(void) FT_Outline_Transform( FT_Outline* outline,
|
|
FT_Matrix* matrix );
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Outline_Reverse */
|
|
/* */
|
|
/* <Description> */
|
|
/* Reverse the drawing direction of an outline. This is used to */
|
|
/* ensure consistent fill conventions for mirrored glyphs.. */
|
|
/* */
|
|
/* <Input> */
|
|
/* outline :: A pointer to the target outline descriptor. */
|
|
/* */
|
|
/* <Note> */
|
|
/* This functions toggles the bit flag ft_outline_reverse_fill in */
|
|
/* the outline's "flags" field.. */
|
|
/* */
|
|
/* It shouldn't be used by a normal client application, unless it */
|
|
/* knows what it's doing.. */
|
|
/* */
|
|
EXPORT_DEF(void) FT_Outline_Reverse( FT_Outline* outline );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Vector_Transform */
|
|
/* */
|
|
/* <Description> */
|
|
/* Transforms a single vector through a 2x2 matrix. */
|
|
/* */
|
|
/* <InOut> */
|
|
/* vector :: The target vector to transform */
|
|
/* */
|
|
/* <Input> */
|
|
/* matrix :: A pointer to the source 2x2 matrix. */
|
|
/* */
|
|
/* <MT-Note> */
|
|
/* Yes. */
|
|
/* */
|
|
EXPORT_DEF(void) FT_Vector_Transform( FT_Vector* vector,
|
|
FT_Matrix* matrix );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Matrix_Multiply */
|
|
/* */
|
|
/* <Description> */
|
|
/* Performs the matrix operation `b = a*b'. */
|
|
/* */
|
|
/* <Input> */
|
|
/* a :: A pointer to matrix `a'. */
|
|
/* */
|
|
/* <InOut> */
|
|
/* b :: A pointer to matrix `b'. */
|
|
/* */
|
|
/* <MT-Note> */
|
|
/* Yes. */
|
|
/* */
|
|
EXPORT_DEF(void) FT_Matrix_Multiply( FT_Matrix* a,
|
|
FT_Matrix* b );
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Matrix_Invert */
|
|
/* */
|
|
/* <Description> */
|
|
/* Inverts a 2x2 matrix. Returns an error if it can't be inverted. */
|
|
/* */
|
|
/* <InOut> */
|
|
/* matrix :: A pointer to the target matrix. Remains untouched in */
|
|
/* case of error. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
/* <MT-Note> */
|
|
/* Yes. */
|
|
/* */
|
|
EXPORT_DEF(FT_Error) FT_Matrix_Invert( FT_Matrix* matrix );
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* FT_Default_Drivers */
|
|
/* */
|
|
/* <Description> */
|
|
/* Adds the set of default drivers to a given library object. */
|
|
/* */
|
|
/* <InOut> */
|
|
/* library :: A handle to a new library object. */
|
|
/* */
|
|
EXPORT_DEF(void) FT_Default_Drivers( FT_Library library );
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
|
|
#endif /* FREETYPE_H */
|
|
|
|
|
|
/* END */
|