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Diffstat (limited to 'nx-X11/extras/freetype2/include/freetype/internal/ftserv.h')
-rw-r--r-- | nx-X11/extras/freetype2/include/freetype/internal/ftserv.h | 260 |
1 files changed, 260 insertions, 0 deletions
diff --git a/nx-X11/extras/freetype2/include/freetype/internal/ftserv.h b/nx-X11/extras/freetype2/include/freetype/internal/ftserv.h new file mode 100644 index 000000000..e5ed8895b --- /dev/null +++ b/nx-X11/extras/freetype2/include/freetype/internal/ftserv.h @@ -0,0 +1,260 @@ +/***************************************************************************/ +/* */ +/* ftserv.h */ +/* */ +/* The FreeType services (specification only). */ +/* */ +/* Copyright 2003 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. */ +/* */ +/***************************************************************************/ + + /*************************************************************************/ + /* */ + /* Each module can export one or more `services'. Each service is */ + /* identified by a constant string and modeled by a pointer; the latter */ + /* generally corresponds to a structure containing function pointers. */ + /* */ + /* Note that a service's data cannot be a mere function pointer because */ + /* in C it is possible that function pointers might be implemented */ + /* differently than data pointers (e.g. 48 bits instead of 32). */ + /* */ + /*************************************************************************/ + + +#ifndef __FTSERV_H__ +#define __FTSERV_H__ + + +FT_BEGIN_HEADER + + + /* + * @macro: + * FT_FACE_FIND_SERVICE + * + * @description: + * This macro is used to look up a service from a face's driver module. + * + * @input: + * face :: + * The source face handle. + * + * id :: + * A string describing the service as defined in the service's + * header files (e.g. FT_SERVICE_ID_MULTI_MASTERS which expands to + * `multi-masters'). It is automatically prefixed with + * `FT_SERVICE_ID_'. + * + * @output: + * ptr :: + * A variable that receives the service pointer. Will be NULL + * if not found. + */ +#define FT_FACE_FIND_SERVICE( face, ptr, id ) \ + FT_BEGIN_STMNT \ + FT_Module module = FT_MODULE( FT_FACE(face)->driver ); \ + /* the strange cast is to allow C++ compilation */ \ + FT_Pointer* Pptr = (FT_Pointer*) &(ptr); \ + \ + \ + *Pptr = NULL; \ + if ( module->clazz->get_interface ) \ + *Pptr = module->clazz->get_interface( module, FT_SERVICE_ID_ ## id ); \ + FT_END_STMNT + + + /* + * @macro: + * FT_FACE_FIND_GLOBAL_SERVICE + * + * @description: + * This macro is used to look up a service from all modules. + * + * @input: + * face :: + * The source face handle. + * + * id :: + * A string describing the service as defined in the service's + * header files (e.g. FT_SERVICE_ID_MULTI_MASTERS which expands to + * `multi-masters'). It is automatically prefixed with + * `FT_SERVICE_ID_'. + * + * @output: + * ptr :: + * A variable that receives the service pointer. Will be NULL + * if not found. + */ +#define FT_FACE_FIND_GLOBAL_SERVICE( face, ptr, id ) \ + FT_BEGIN_STMNT \ + FT_Module module = FT_MODULE( FT_FACE(face)->driver ); \ + /* the strange cast is to allow C++ compilation */ \ + FT_Pointer* Pptr = (FT_Pointer*) &(ptr); \ + \ + \ + *Pptr = ft_module_get_service( module, FT_SERVICE_ID_ ## id ); \ + FT_END_STMNT + + + /*************************************************************************/ + /*************************************************************************/ + /***** *****/ + /***** S E R V I C E D E S C R I P T O R S *****/ + /***** *****/ + /*************************************************************************/ + /*************************************************************************/ + + /* + * The following structure is used to _describe_ a given service + * to the library. This is useful to build simple static service lists. + */ + typedef struct FT_ServiceDescRec_ + { + const char* serv_id; /* service name */ + const void* serv_data; /* service pointer/data */ + + } FT_ServiceDescRec; + + typedef const FT_ServiceDescRec* FT_ServiceDesc; + + + /* + * Parse a list of FT_ServiceDescRec descriptors and look for + * a specific service by ID. Note that the last element in the + * array must be { NULL, NULL }, and that the function should + * return NULL if the service isn't available. + * + * This function can be used by modules to implement their + * `get_service' method. + */ + FT_BASE( FT_Pointer ) + ft_service_list_lookup( FT_ServiceDesc service_descriptors, + const char* service_id ); + + + /*************************************************************************/ + /*************************************************************************/ + /***** *****/ + /***** S E R V I C E S C A C H E *****/ + /***** *****/ + /*************************************************************************/ + /*************************************************************************/ + + /* + * This structure is used to store a cache for several frequently used + * services. It is the type of `face->internal->services'. You + * should only use FT_FACE_LOOKUP_SERVICE to access it. + * + * All fields should have the type FT_Pointer to relax compilation + * dependencies. We assume the developer isn't completely stupid. + * + * Each field must be named `service_XXXX' where `XXX' corresponds to + * the correct FT_SERVICE_ID_XXXX macro. See the definition of + * FT_FACE_LOOKUP_SERVICE below how this is implemented. + * + */ + typedef struct FT_ServiceCacheRec_ + { + FT_Pointer service_POSTSCRIPT_FONT_NAME; + FT_Pointer service_MULTI_MASTERS; + FT_Pointer service_GLYPH_DICT; + FT_Pointer service_PFR_METRICS; + FT_Pointer service_WINFNT; + + } FT_ServiceCacheRec, *FT_ServiceCache; + + + /* + * A magic number used within the services cache. + */ +#define FT_SERVICE_UNAVAILABLE ((FT_Pointer)-2) /* magic number */ + + + /* + * @macro: + * FT_FACE_LOOKUP_SERVICE + * + * @description: + * This macro is used to lookup a service from a face's driver module + * using its cache. + * + * @input: + * face:: + * The source face handle containing the cache. + * + * field :: + * The field name in the cache. + * + * id :: + * The service ID. + * + * @output: + * ptr :: + * A variable receiving the service data. NULL if not available. + */ +#define FT_FACE_LOOKUP_SERVICE( face, ptr, id ) \ + FT_BEGIN_STMNT \ + /* the strange cast is to allow C++ compilation */ \ + FT_Pointer* pptr = (FT_Pointer*)&(ptr); \ + FT_Pointer svc; \ + \ + \ + svc = FT_FACE(face)->internal->services. service_ ## id ; \ + if ( svc == FT_SERVICE_UNAVAILABLE ) \ + svc = NULL; \ + else if ( svc == NULL ) \ + { \ + FT_FACE_FIND_SERVICE( face, svc, id ); \ + \ + FT_FACE(face)->internal->services. service_ ## id = \ + (FT_Pointer)( svc != NULL ? svc \ + : FT_SERVICE_UNAVAILABLE ); \ + } \ + *pptr = svc; \ + FT_END_STMNT + + + /* + * A macro used to define new service structure types. + */ + +#define FT_DEFINE_SERVICE( name ) \ + typedef struct FT_Service_ ## name ## Rec_ \ + FT_Service_ ## name ## Rec ; \ + typedef struct FT_Service_ ## name ## Rec_ \ + const * FT_Service_ ## name ; \ + struct FT_Service_ ## name ## Rec_ + + /* */ + + /* + * The header files containing the services. + */ + +#define FT_SERVICE_MULTIPLE_MASTERS_H <freetype/internal/services/svmm.h> +#define FT_SERVICE_POSTSCRIPT_NAME_H <freetype/internal/services/svpostnm.h> +#define FT_SERVICE_POSTSCRIPT_CMAPS_H <freetype/internal/services/svpscmap.h> +#define FT_SERVICE_POSTSCRIPT_INFO_H <freetype/internal/services/svpsinfo.h> +#define FT_SERVICE_GLYPH_DICT_H <freetype/internal/services/svgldict.h> +#define FT_SERVICE_BDF_H <freetype/internal/services/svbdf.h> +#define FT_SERVICE_XFREE86_NAME_H <freetype/internal/services/svxf86nm.h> +#define FT_SERVICE_SFNT_H <freetype/internal/services/svsfnt.h> +#define FT_SERVICE_PFR_H <freetype/internal/services/svpfr.h> +#define FT_SERVICE_WINFNT_H <freetype/internal/services/svwinfnt.h> +#define FT_SERVICE_TT_CMAP_H <freetype/internal/services/svttcmap.h> + + /* */ + +FT_END_HEADER + +#endif /* __FTSERV_H__ */ + + +/* END */ |