| /***************************************************************************/ |
| /* */ |
| /* ftmodule.h */ |
| /* */ |
| /* FreeType modules public interface (specification). */ |
| /* */ |
| /* Copyright 1996-2001 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 __FTMODULE_H__ |
| #define __FTMODULE_H__ |
| |
| |
| #include <ft2build.h> |
| #include FT_FREETYPE_H |
| |
| |
| 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 */ |
| typedef enum FT_Module_Flags_ |
| { |
| ft_module_font_driver = 1, /* this module is a font driver */ |
| ft_module_renderer = 2, /* this module is a renderer */ |
| ft_module_hinter = 4, /* this module is a glyph hinter */ |
| ft_module_styler = 8, /* this module is a styler */ |
| |
| ft_module_driver_scalable = 0x100, /* the driver supports scalable */ |
| /* fonts */ |
| ft_module_driver_no_outlines = 0x200, /* the driver does not support */ |
| /* vector outlines */ |
| ft_module_driver_has_hinter = 0x400 /* the driver provides its own */ |
| /* hinter */ |
| |
| } FT_Module_Flags; |
| |
| |
| typedef void |
| (*FT_Module_Interface)( void ); |
| |
| typedef FT_Error |
| (*FT_Module_Constructor)( FT_Module module ); |
| |
| typedef void |
| (*FT_Module_Destructor)( FT_Module 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 */ |
| /* (starts at version 2.0, i.e 0x20000) */ |
| /* */ |
| /* module_init :: A function used to initialize (not create) a */ |
| /* new module object. */ |
| /* */ |
| /* module_done :: A function used to finalize (not destroy) a */ |
| /* given module object */ |
| /* */ |
| /* get_interface :: Queries a given module for a specific */ |
| /* interface by name. */ |
| /* */ |
| typedef struct FT_Module_Class_ |
| { |
| FT_ULong module_flags; |
| FT_Int 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> */ |
| /* Adds 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> */ |
| /* Finds 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> */ |
| /* You should better be familiar with FreeType internals to know */ |
| /* which module to look for :-) */ |
| /* */ |
| FT_EXPORT( FT_Module ) |
| FT_Get_Module( FT_Library library, |
| const char* module_name ); |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* FT_Remove_Module */ |
| /* */ |
| /* <Description> */ |
| /* Removes 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. */ |
| /* */ |
| /* <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> */ |
| /* Discards 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 ); |
| |
| |
| |
| typedef void |
| (*FT_DebugHook_Func)( void* arg ); |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* FT_Set_Debug_Hook */ |
| /* */ |
| /* <Description> */ |
| /* Sets a debug hook function for debugging the interpreter of a font */ |
| /* format. */ |
| /* */ |
| /* <InOut> */ |
| /* library :: A handle to the library object. */ |
| /* */ |
| /* <Input> */ |
| /* hook_index :: The index of the debug hook. You should use the */ |
| /* values defined in ftobjs.h, e.g. */ |
| /* FT_DEBUG_HOOK_TRUETYPE. */ |
| /* */ |
| /* debug_hook :: The function used to debug the interpreter. */ |
| /* */ |
| /* <Note> */ |
| /* Currently, four debug hook slots are available, but only two (for */ |
| /* the TrueType and the Type 1 interpreter) are defined. */ |
| /* */ |
| FT_EXPORT( void ) |
| FT_Set_Debug_Hook( FT_Library library, |
| FT_UInt hook_index, |
| FT_DebugHook_Func debug_hook ); |
| |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* FT_Add_Default_Modules */ |
| /* */ |
| /* <Description> */ |
| /* Adds 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 /* __FTMODULE_H__ */ |
| |
| |
| /* END */ |
