/harfbuzz/src/hb-old/harfbuzz-gsub.h
C Header | 148 lines | 75 code | 40 blank | 33 comment | 0 complexity | ed7f4fc6ef7ecc6491258f3a3dba6fce MD5 | raw file
Possible License(s): Apache-2.0, MIT
- /*
- * Copyright (C) 1998-2004 David Turner and Werner Lemberg
- * Copyright (C) 2006 Behdad Esfahbod
- *
- * This is part of HarfBuzz, an OpenType Layout engine library.
- *
- * Permission is hereby granted, without written agreement and without
- * license or royalty fees, to use, copy, modify, and distribute this
- * software and its documentation for any purpose, provided that the
- * above copyright notice and the following two paragraphs appear in
- * all copies of this software.
- *
- * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
- * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
- * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
- * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
- * DAMAGE.
- *
- * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
- * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
- * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
- * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
- * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
- */
- #ifndef HARFBUZZ_GSUB_H
- #define HARFBUZZ_GSUB_H
- #include "harfbuzz-gdef.h"
- #include "harfbuzz-buffer.h"
- HB_BEGIN_HEADER
- #ifdef HB_USE_PACKED_STRUCTS
- #pragma pack(push, 1)
- #endif
- /* Lookup types for glyph substitution */
- #define HB_GSUB_LOOKUP_SINGLE 1
- #define HB_GSUB_LOOKUP_MULTIPLE 2
- #define HB_GSUB_LOOKUP_ALTERNATE 3
- #define HB_GSUB_LOOKUP_LIGATURE 4
- #define HB_GSUB_LOOKUP_CONTEXT 5
- #define HB_GSUB_LOOKUP_CHAIN 6
- #define HB_GSUB_LOOKUP_EXTENSION 7
- #define HB_GSUB_LOOKUP_REVERSE_CHAIN 8
- /* A pointer to a function which selects the alternate glyph. `pos' is
- the position of the glyph with index `glyphID', `num_alternates'
- gives the number of alternates in the `alternates' array. `data'
- points to the user-defined structure specified during a call to
- HB_GSUB_Register_Alternate_Function(). The function must return an
- index into the `alternates' array. */
- typedef HB_UShort (*HB_AltFunction)(HB_UInt pos,
- HB_UShort glyphID,
- HB_UShort num_alternates,
- HB_UShort* alternates,
- void* data );
- struct HB_GSUBHeader_
- {
- HB_GDEFHeader* gdef;
- /* the next two fields are used for an alternate substitution callback
- function to select the proper alternate glyph. */
- void* data;
- HB_AltFunction altfunc;
- HB_UInt offset;
- HB_16Dot16 Version;
- HB_ScriptList ScriptList;
- HB_FeatureList FeatureList;
- HB_LookupList LookupList;
- };
- typedef struct HB_GSUBHeader_ HB_GSUBHeader;
- typedef HB_GSUBHeader* HB_GSUB;
- HB_Error HB_Load_GSUB_Table( HB_Stream stream,
- HB_GSUBHeader** gsub,
- HB_GDEFHeader* gdef,
- HB_Stream gdefStream );
- HB_Error HB_Done_GSUB_Table( HB_GSUBHeader* gsub );
- HB_Error HB_GSUB_Select_Script( HB_GSUBHeader* gsub,
- HB_UInt script_tag,
- HB_UShort* script_index );
- HB_Error HB_GSUB_Select_Language( HB_GSUBHeader* gsub,
- HB_UInt language_tag,
- HB_UShort script_index,
- HB_UShort* language_index,
- HB_UShort* req_feature_index );
- HB_Error HB_GSUB_Select_Feature( HB_GSUBHeader* gsub,
- HB_UInt feature_tag,
- HB_UShort script_index,
- HB_UShort language_index,
- HB_UShort* feature_index );
- HB_Error HB_GSUB_Query_Scripts( HB_GSUBHeader* gsub,
- HB_UInt** script_tag_list );
- HB_Error HB_GSUB_Query_Languages( HB_GSUBHeader* gsub,
- HB_UShort script_index,
- HB_UInt** language_tag_list );
- HB_Error HB_GSUB_Query_Features( HB_GSUBHeader* gsub,
- HB_UShort script_index,
- HB_UShort language_index,
- HB_UInt** feature_tag_list );
- HB_Error HB_GSUB_Add_Feature( HB_GSUBHeader* gsub,
- HB_UShort feature_index,
- HB_UInt property );
- HB_Error HB_GSUB_Clear_Features( HB_GSUBHeader* gsub );
- HB_Error HB_GSUB_Register_Alternate_Function( HB_GSUBHeader* gsub,
- HB_AltFunction altfunc,
- void* data );
- HB_Error HB_GSUB_Apply_String( HB_GSUBHeader* gsub,
- HB_Buffer buffer );
- #ifdef HB_USE_PACKED_STRUCTS
- #pragma pack(pop)
- #endif
- HB_END_HEADER
- #endif /* HARFBUZZ_GSUB_H */