| /***************************************************************************/ |
| /* */ |
| /* otload.h */ |
| /* */ |
| /* OpenType layout loader functions (specification). */ |
| /* */ |
| /* Copyright 1996-1999 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 OTLOAD_H |
| #define OTLOAD_H |
| |
| #include <otlayout.h> |
| #include <ftstream.h> |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* OTL_Load_Script_List */ |
| /* */ |
| /* <Description> */ |
| /* Loads an OpenType Script List from a font resource. */ |
| /* */ |
| /* <Input> */ |
| /* list :: The target script list. */ |
| /* stream :: The input stream. */ |
| /* */ |
| /* <Return> */ |
| /* TrueType error code. 0 means success. */ |
| /* */ |
| LOCAL_DEF |
| TT_Error OTL_Load_Script_List( OTL_Script_List* list, |
| FT_Stream stream ); |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* OTL_Load_Feature_List */ |
| /* */ |
| /* <Description> */ |
| /* Loads an OpenType Feature List from a font resource. */ |
| /* */ |
| /* <Input> */ |
| /* list :: The target feature list. */ |
| /* stream :: The input stream. */ |
| /* */ |
| /* <Return> */ |
| /* TrueType error code. 0 means success. */ |
| /* */ |
| LOCAL_DEF |
| TT_Error OTL_Load_Feature_List( OTL_Feature_List* list, |
| FT_Stream stream ); |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* OTL_Load_Lookup_List */ |
| /* */ |
| /* <Description> */ |
| /* Loads an OpenType Lookup List from a font resource. */ |
| /* */ |
| /* <Input> */ |
| /* list :: The target lookup list. */ |
| /* stream :: The input stream. */ |
| /* */ |
| /* <Return> */ |
| /* TrueType error code. 0 means success. */ |
| /* */ |
| /* <Note> */ |
| /* This function does NOT load the lookup sub-tables. Instead, it */ |
| /* stores the file offsets of the particular table in each lookup */ |
| /* element. It is up to the caller to load these sub-tables. This */ |
| /* can be done more easily with OTL_Iterate_Lookup_List(). */ |
| /* */ |
| LOCAL_DEF |
| TT_Error OTL_Load_Lookup_List( OTL_Lookup_List* list, |
| FT_Stream stream ); |
| |
| |
| typedef int OTL_Lookup_Iterator( OTL_Lookup* lookup, |
| void* closure ); |
| |
| |
| typedef void OTL_Lookup_Destructor( OTL_Lookup* lookup, |
| FT_System system ); |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* OTL_Iterate_Lookup_List */ |
| /* */ |
| /* <Description> */ |
| /* Scans an OpenType Lookup List. This can be used to load the */ |
| /* Lookup sub-tables in a GSUB or GPOS loader. */ |
| /* */ |
| /* <Input> */ |
| /* list :: The source list. */ |
| /* iterator :: The iterator -- a function which is called on each */ |
| /* element of the list. */ |
| /* closure :: User-specified data which is passed to each iterator */ |
| /* with the lookup element pointer. */ |
| /* */ |
| /* <Return> */ |
| /* If one iterator call returns a non-zero `result', the list parsing */ |
| /* is aborted and the value is returned to the caller. Otherwise, */ |
| /* the function returns 0 when the list has been parsed completely. */ |
| /* */ |
| LOCAL_DEF |
| TT_Error OTL_Iterate_Lookup_List( OTL_Lookup_List* list, |
| OTL_Lookup_Iterator iterator, |
| void* closure ); |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* OTL_Load_Coverage */ |
| /* */ |
| /* <Description> */ |
| /* Loads an OpenType Coverage table from a font resource. */ |
| /* */ |
| /* <Input> */ |
| /* coverage :: The target coverage. */ |
| /* stream :: The input stream. */ |
| /* */ |
| /* <Return> */ |
| /* TrueType error code. 0 means success. */ |
| /* */ |
| LOCAL_FUNC |
| TT_Error OTL_Load_Coverage( OTL_Coverage* coverage, |
| FT_Stream stream ); |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* OTL_Load_Class_Def */ |
| /* */ |
| /* <Description> */ |
| /* Loads an OpenType Class Definition table from a resource. */ |
| /* */ |
| /* <Input> */ |
| /* class_def :: The target class definition. */ |
| /* stream :: The input stream. */ |
| /* */ |
| /* <Return> */ |
| /* TrueType error code. 0 means success. */ |
| /* */ |
| LOCAL_DEF |
| TT_Error OTL_Load_Class_Def( OTL_Class_Def* class_def, |
| FT_Stream stream ); |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* OTL_Load_Device */ |
| /* */ |
| /* <Description> */ |
| /* Loads an OpenType Device table from a font resource. */ |
| /* */ |
| /* <Input> */ |
| /* device :: The target device table. */ |
| /* stream :: The input stream. */ |
| /* */ |
| /* <Return> */ |
| /* TrueType error code. 0 means success. */ |
| /* */ |
| LOCAL_DEF |
| TT_Error OTL_Load_Device( OTL_Device* device, |
| FT_Stream stream ); |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* OTL_Free_Script_List */ |
| /* */ |
| /* <Description> */ |
| /* Releases a given OpenType Script list. */ |
| /* */ |
| /* <Input> */ |
| /* list :: The target script list. */ |
| /* system :: The current system object. */ |
| /* */ |
| LOCAL_DEF |
| void OTL_Free_Script_List( OTL_Script_List* list, |
| FT_System system ); |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* OTL_Free_Features_List */ |
| /* */ |
| /* <Description> */ |
| /* Releases a given OpenType Features list. */ |
| /* */ |
| /* <Input> */ |
| /* list :: The target feature list. */ |
| /* system :: The current system object. */ |
| /* */ |
| LOCAL_DEF |
| void OTL_Free_Features_List( OTL_Feature_List* list, |
| FT_System system ); |
| |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* OTL_Free_Lookup_List */ |
| /* */ |
| /* <Description> */ |
| /* Releases a given OpenType Lookup list. Uses a destructor called */ |
| /* to destroy the Lookup sub-tables. */ |
| /* */ |
| /* <Input> */ |
| /* list :: The target lookup list. */ |
| /* system :: The current system object. */ |
| /* destructor :: A destructor function called on each lookup element. */ |
| /* Can be used to destroy sub-tables. Ignored if NULL. */ |
| /* */ |
| LOCAL_DEF |
| void OTL_Free_Lookup_List( OTL_Lookup_List* list, |
| FT_System system, |
| OTL_Lookup_Destructor destroy ); |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* OTL_Free_Coverage */ |
| /* */ |
| /* <Description> */ |
| /* Releases a given OpenType Coverage table. */ |
| /* */ |
| /* <Input> */ |
| /* coverage :: The target coverage. */ |
| /* system :: The current system object. */ |
| /* */ |
| LOCAL_DEF |
| void OTL_Free_Coverage( OTL_Coverage* coverage, |
| FT_System system ); |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* OTL_Free_Class_Def */ |
| /* */ |
| /* <Description> */ |
| /* Releases a given OpenType Class Definition table. */ |
| /* */ |
| /* <Input> */ |
| /* class_def :: The target class definition. */ |
| /* system :: The current system object. */ |
| /* */ |
| LOCAL_DEF |
| void OTL_Free_Class_Def( OTL_Class_Def* class_def, |
| FT_System system ); |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* OTL_Free_Device */ |
| /* */ |
| /* <Description> */ |
| /* Releases a given OpenType Layout Device table. */ |
| /* */ |
| /* <Input> */ |
| /* device :: The target device table. */ |
| /* system :: The current system object. */ |
| /* */ |
| LOCAL_DEF |
| void OTL_Free_Device( OTL_Device* device, |
| FT_System system ); |
| |
| |
| #endif /* OTLOAD_H */ |
| |
| |
| /* END */ |
