/***************************************************************************/
/* */
/* ftmodapi.h */
/* */
/* FreeType modules public interface (specification). */
/* */
/* Copyright 1996-2018 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
FT_BEGIN_HEADER
/*************************************************************************/
/* */
/* <Section> */
/* module_management */
/* */
/* <Title> */
/* Module Management */
/* */
/* <Abstract> */
/* How to add, upgrade, remove, and control modules from FreeType. */
/* */
/* <Description> */
/* The definitions below are used to manage modules within FreeType. */
/* Modules can be added, upgraded, and removed at runtime. */
/* Additionally, some module properties can be controlled also. */
/* */
/* Here is a list of possible values of the `module_name' field in */
/* the @FT_Module_Class structure. */
/* */
/* { */
/* autofitter */
/* bdf */
/* cff */
/* gxvalid */
/* otvalid */
/* pcf */
/* pfr */
/* psaux */
/* pshinter */
/* psnames */
/* sfnt */
/* smooth, smooth-lcd, smooth-lcdv */
/* truetype */
/* type1 */
/* type42 */
/* t1cid */
/* winfonts */
/* } */
/* */
/* Note that the FreeType Cache sub-system is not a FreeType module. */
/* */
/* <Order> */
/* FT_Module */
/* FT_Module_Constructor */
/* FT_Module_Destructor */
/* FT_Module_Requester */
/* FT_Module_Class */
/* */
/* FT_Add_Module */
/* FT_Get_Module */
/* FT_Remove_Module */
/* FT_Add_Default_Modules */
/* */
/* FT_New_Library */
/* FT_Done_Library */
/* */
/* FT_Renderer */
/* FT_Renderer_Class */
/* */
/* FT_Set_Debug_Hook */
/* */
/*************************************************************************/
/* 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 */
#define FT_MODULE_DRIVER_HINTS_LIGHTLY 0x800 /* the driver's hinter */
/* produces LIGHT hints */
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 be searched. */
/* */
/* 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. */
/* */
FT_EXPORT( FT_Module )
FT_Get_Module( FT_Library library,
const char* module_name );
/*************************************************************************/
/* */
/* <Function> */
/* FT_Remove_Module */
/* */
/* <Description> */
/* Remove a given module from a library instance. */
/* */
/* <InOut> */
/* library :: A handle to a library object. */
/* */
/* <Input> */
/* module :: A handle to a module object. */
/* */
/* <Return> */
/* FreeType error code. 0~means success. */
/* */
/* <Note> */
/* The module object is destroyed by the function in case of success. */
/* */
FT_EXPORT( FT_Error )
FT_Remove_Module( FT_Library library,
FT_Module module );
/*************************************************************************/
/* */
/* <Function> */
/* FT_New_Library */
/* */
/* <Description> */
/* This function is used to create a new FreeType library instance */
/* from a given memory object. It is thus possible to use libraries */
/* with distinct memory allocators within the same program. Note, */
/* however, that the used @FT_Memory structure is expected to remain */
/* valid for the life of the @FT_Library object. */
/* */
/* Normally, you would call this function (followed by a call to */
/* @FT_Add_Default_Modules or a series of calls to @FT_Add_Module, */
/* and a call to @FT_Set_Default_Properties) instead of */
/* @FT_Init_FreeType to initialize the FreeType library. */
/* */
/* Don't use @FT_Done_FreeType but @FT_Done_Library to destroy a */
/* library instance. */
/* */
/* <Input> */
/* memory :: A handle to the original memory object. */
/* */
/* <Output> */
/* alibrary :: A pointer to handle of a new library object. */
/* */
/* <Return> */
/* FreeType error code. 0~means success. */
/* */
FT_EXPORT( FT_Error )
FT_New_Library( FT_Memory memory,
FT_Library *alibrary );
/*************************************************************************/
/* */
/* <Function> */
/* FT_Done_Library */
/* */
/* <Description> */
/* Discard a given library object. This closes all drivers and */
/* discards all resource objects. */
/* */
/* <Input> */
/* library :: A handle to the target library. */
/* */
/* <Return> */
/* FreeType error code. 0~means success. */
/* */
FT_EXPORT( FT_Error )
FT_Done_Library( FT_Library library );
/*************************************************************************/
/* */
/* <Function> */
/* FT_Add_Default_Modules */
/* */
/* <Description> */
/* Add the set of default drivers to a given library object. */
/* This is only useful when you create a library object with */
/* @FT_New_Library (usually to plug a custom memory manager). */
/* */
/* <InOut> */
/* library :: A handle to a new library object. */
/* */
FT_EXPORT( void )
FT_Add_Default_Modules( FT_Library library );
/* */
FT_END_HEADER
#endif /* FTMODAPI_H_ */
/* END */