forked from minhngoc25a/freetype2
199 lines
6.6 KiB
C
199 lines
6.6 KiB
C
/***************************************************************************/
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/* */
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/* ftmodule.h */
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/* */
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/* FreeType modules public interface. */
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/* */
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/* Copyright 1996-2000 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 FTMODULE_H
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#define FTMODULE_H
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#include <freetype/freetype.h>
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/* module bit flags */
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typedef enum FT_Module_Flags_
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{
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ft_module_font_driver = 1, /* this module is a font driver */
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ft_module_renderer = 2, /* this module is a renderer */
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ft_module_hinter = 4, /* this module is a glyph hinter */
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ft_module_styler = 8, /* this module is a styler */
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ft_module_driver_scalable = 0x100, /* the driver supports scalable fonts */
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ft_module_driver_no_outlines = 0x200, /* the driver does not support vector outlines */
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ft_module_driver_has_hinter = 0x400 /* the driver provides its own hinter */
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} FT_Module_Flags;
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typedef void (*FT_Module_Interface)( void );
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typedef FT_Error (*FT_Module_Constructor)( FT_Module module );
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typedef void (*FT_Module_Destructor)( FT_Module module );
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typedef FT_Module_Interface (*FT_Module_Requester)( FT_Module module,
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const char* name );
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/*************************************************************************
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*
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* <Struct>
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* FT_Module_Class
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*
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* <Description>
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* The module class descriptor.
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*
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* <Fields>
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* module_flags :: bit flags describing the module
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* module_size :: size of one module object/instance in bytes
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* module_name :: name of the module
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* module_version :: version, as a 16.16 fixed number (major.minor)
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* module_requires :: the version of FreeType this module requires
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* (starts at 2.0, a.k.a. 0x20000)
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*
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* module_init :: a function used to initialise (not create) a
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* new module object
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*
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* module_done :: a function used to finalise (not destroy) a
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* given module object
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*
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* get_interface :: queries a given module for a specific interface
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* by name..
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*
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*************************************************************************/
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typedef struct FT_Module_Class_
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{
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FT_ULong module_flags;
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FT_Int module_size;
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const FT_String* module_name;
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FT_Fixed module_version;
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FT_Fixed module_requires;
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const void* module_interface;
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FT_Module_Constructor module_init;
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FT_Module_Destructor module_done;
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FT_Module_Requester get_interface;
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} FT_Module_Class;
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/*************************************************************************
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*
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* <Function>
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* FT_Add_Module
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*
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* <Description>
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* Add a new module to a given library instance.
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*
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* <Input>
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* library :: handle to library object
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* clazz :: pointer to class descriptor for the module
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*
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* <Return>
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* Error code. 0 means success
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*
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* <Note>
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* An error will be returned if a module already exists by that
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* name, or if the module requires a version of freetype that is
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* too great
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*
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*************************************************************************/
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FT_EXPORT_DEF(FT_Error) FT_Add_Module( FT_Library library,
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const FT_Module_Class* clazz );
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/*************************************************************************
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*
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* <Function>
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* FT_Get_Module
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*
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* <Description>
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* Find a module by its name.
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*
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* <Input>
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* library :: handle to library object
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* module_name :: the module's ASCII name.
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*
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* <Return>
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* Module handle, 0 if none was found.
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*
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* <Note>
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* You'd better be familiar with FreeType internals to know which
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* module to look for :-)
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*
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*************************************************************************/
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FT_EXPORT_DEF(FT_Module) FT_Get_Module( FT_Library library,
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const char* module_name );
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/*************************************************************************
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*
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* <Function>
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* FT_Get_Module_Interface
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*
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* <Description>
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* Find a module and returns it's specific interface as a void*
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*
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* <Input>
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* library :: handle to library object
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* module_name :: the module's ASCII name.
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*
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* <Return>
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* Module specific interface, if any
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*
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* <Note>
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* You'd better be familiar with FreeType internals to know which
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* module to look for, and what it's interface is :-)
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*
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*************************************************************************/
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FT_EXPORT_DEF(const void*) FT_Get_Module_Interface( FT_Library library,
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const char* mod_name );
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/*************************************************************************
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*
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* <Function>
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* FT_Remove_Module
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*
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* <Description>
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* Removes a given module from a library instance.
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*
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* <Input>
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* library :: handle to library object
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* module :: handle to module object
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*
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* <Return>
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* Error code (module not listed)
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*
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* <Note>
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* The module object is destroyed by the function in case of success
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*
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*************************************************************************/
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FT_EXPORT_DEF(FT_Error) FT_Remove_Module( FT_Library library,
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FT_Module module );
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#endif /* FTMODULE_H */
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/* END */
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