ftmodapi.h.svn-base
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/***************************************************************************/
/* */
/* ftmodapi.h */
/* */
/* FreeType modules public interface (specification). */
/* */
/* Copyright 1996-2001, 2002, 2003, 2006, 2008 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
/* modified, and distributed under the terms of the FreeType project */
/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
/* this file you indicate that you have read the license and */
/* understand and accept it fully. */
/* */
/***************************************************************************/
#ifndef __FTMODAPI_H__
#define __FTMODAPI_H__
#include <ft2build.h>
#include FT_FREETYPE_H
#ifdef FREETYPE_H
#error "freetype.h of FreeType 1 has been loaded!"
#error "Please fix the directory search order for header files"
#error "so that freetype.h of FreeType 2 is found first."
#endif
FT_BEGIN_HEADER
/*************************************************************************/
/* */
/* <Section> */
/* module_management */
/* */
/* <Title> */
/* Module Management */
/* */
/* <Abstract> */
/* How to add, upgrade, and remove modules from FreeType. */
/* */
/* <Description> */
/* The definitions below are used to manage modules within FreeType. */
/* Modules can be added, upgraded, and removed at runtime. */
/* */
/*************************************************************************/
/* module bit flags */
#define FT_MODULE_FONT_DRIVER 1 /* this module is a font driver */
#define FT_MODULE_RENDERER 2 /* this module is a renderer */
#define FT_MODULE_HINTER 4 /* this module is a glyph hinter */
#define FT_MODULE_STYLER 8 /* this module is a styler */
#define FT_MODULE_DRIVER_SCALABLE 0x100 /* the driver supports */
/* scalable fonts */
#define FT_MODULE_DRIVER_NO_OUTLINES 0x200 /* the driver does not */
/* support vector outlines */
#define FT_MODULE_DRIVER_HAS_HINTER 0x400 /* the driver provides its */
/* own hinter */
/* deprecated values */
#define ft_module_font_driver FT_MODULE_FONT_DRIVER
#define ft_module_renderer FT_MODULE_RENDERER
#define ft_module_hinter FT_MODULE_HINTER
#define ft_module_styler FT_MODULE_STYLER
#define ft_module_driver_scalable FT_MODULE_DRIVER_SCALABLE
#define ft_module_driver_no_outlines FT_MODULE_DRIVER_NO_OUTLINES
#define ft_module_driver_has_hinter FT_MODULE_DRIVER_HAS_HINTER
typedef FT_Pointer FT_Module_Interface;
/*************************************************************************/
/* */
/* <FuncType> */
/* FT_Module_Constructor */
/* */
/* <Description> */
/* A function used to initialize (not create) a new module object. */
/* */
/* <Input> */
/* module :: The module to initialize. */
/* */
typedef FT_Error
(*FT_Module_Constructor)( FT_Module module );
/*************************************************************************/
/* */
/* <FuncType> */
/* FT_Module_Destructor */
/* */
/* <Description> */
/* A function used to finalize (not destroy) a given module object. */
/* */
/* <Input> */
/* module :: The module to finalize. */
/* */
typedef void
(*FT_Module_Destructor)( FT_Module module );
/*************************************************************************/
/* */
/* <FuncType> */
/* FT_Module_Requester */
/* */
/* <Description> */
/* A function used to query a given module for a specific interface. */
/* */
/* <Input> */
/* module :: The module to finalize. */
/* */
/* name :: The name of the interface in the module. */
/* */
typedef FT_Module_Interface
(*FT_Module_Requester)( FT_Module module,
const char* name );
/*************************************************************************/
/* */
/* <Struct> */
/* FT_Module_Class */
/* */
/* <Description> */
/* The module class descriptor. */
/* */
/* <Fields> */
/* module_flags :: Bit flags describing the module. */
/* */
/* module_size :: The size of one module object/instance in */
/* bytes. */
/* */
/* module_name :: The name of the module. */
/* */
/* module_version :: The version, as a 16.16 fixed number */
/* (major.minor). */
/* */
/* module_requires :: The version of FreeType this module requires, */
/* as a 16.16 fixed number (major.minor). Starts */
/* at version 2.0, i.e., 0x20000. */
/* */
/* module_init :: The initializing function. */
/* */
/* module_done :: The finalizing function. */
/* */
/* get_interface :: The interface requesting function. */
/* */
typedef struct FT_Module_Class_
{
FT_ULong module_flags;
FT_Long module_size;
const FT_String* module_name;
FT_Fixed module_version;
FT_Fixed module_requires;
const void* module_interface;
FT_Module_Constructor module_init;
FT_Module_Destructor module_done;
FT_Module_Requester get_interface;
} FT_Module_Class;
/*************************************************************************/
/* */
/* <Function> */
/* FT_Add_Module */
/* */
/* <Description> */
/* Add a new module to a given library instance. */
/* */
/* <InOut> */
/* library :: A handle to the library object. */
/* */
/* <Input> */
/* clazz :: A pointer to class descriptor for the module. */
/* */
/* <Return> */
/* FreeType error code. 0~means success. */
/* */
/* <Note> */
/* An error will be returned if a module already exists by that name, */
/* or if the module requires a version of FreeType that is too great. */
/* */
FT_EXPORT( FT_Error )
FT_Add_Module( FT_Library library,
const FT_Module_Class* clazz );
/*************************************************************************/
/* */
/* <Function> */
/* FT_Get_Module */
/* */
/* <Description> */
/* Find a module by its name. */
/* */
/* <Input> */
/* library :: A handle to the library object. */
/* */
/* module_name :: The module's name (as an ASCII string). */
/* */
/* <Return> */
/* A module handle. 0~if none was found. */
/* */
/* <Note> */
/* FreeType's internal modules aren't documented very well, and you */
/* should look up the source code for details. */
/* */
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