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Diffstat (limited to 'third_party/harfbuzz/src/harfbuzz-gpos.h')
| -rw-r--r-- | third_party/harfbuzz/src/harfbuzz-gpos.h | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/third_party/harfbuzz/src/harfbuzz-gpos.h b/third_party/harfbuzz/src/harfbuzz-gpos.h new file mode 100644 index 0000000000..2840dae480 --- /dev/null +++ b/third_party/harfbuzz/src/harfbuzz-gpos.h @@ -0,0 +1,149 @@ +/* + * 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_GPOS_H +#define HARFBUZZ_GPOS_H + +#include "harfbuzz-gdef.h" +#include "harfbuzz-buffer.h" + +HB_BEGIN_HEADER + + +/* Lookup types for glyph positioning */ + +#define HB_GPOS_LOOKUP_SINGLE 1 +#define HB_GPOS_LOOKUP_PAIR 2 +#define HB_GPOS_LOOKUP_CURSIVE 3 +#define HB_GPOS_LOOKUP_MARKBASE 4 +#define HB_GPOS_LOOKUP_MARKLIG 5 +#define HB_GPOS_LOOKUP_MARKMARK 6 +#define HB_GPOS_LOOKUP_CONTEXT 7 +#define HB_GPOS_LOOKUP_CHAIN 8 +#define HB_GPOS_LOOKUP_EXTENSION 9 + +/* A pointer to a function which accesses the PostScript interpreter. + Multiple Master fonts need this interface to convert a metric ID + (as stored in an OpenType font version 1.2 or higher) `metric_id' + into a metric value (returned in `metric_value'). + + `data' points to the user-defined structure specified during a + call to HB_GPOS_Register_MM_Function(). + + `metric_value' must be returned as a scaled value (but shouldn't + be rounded). */ + +typedef HB_Error (*HB_MMFunction)(HB_Font font, + HB_UShort metric_id, + HB_Fixed* metric_value, + void* data ); + + +struct HB_GPOSHeader_ +{ + HB_16Dot16 Version; + + HB_ScriptList ScriptList; + HB_FeatureList FeatureList; + HB_LookupList LookupList; + + HB_GDEFHeader* gdef; + + /* this is OpenType 1.2 -- Multiple Master fonts need this + callback function to get various metric values from the + PostScript interpreter. */ + + HB_MMFunction mmfunc; + void* data; +}; + +typedef struct HB_GPOSHeader_ HB_GPOSHeader; +typedef HB_GPOSHeader* HB_GPOS; + + +HB_Error HB_Load_GPOS_Table( HB_Stream stream, + HB_GPOSHeader** gpos, + HB_GDEFHeader* gdef, + HB_Stream gdefStream ); + + +HB_Error HB_Done_GPOS_Table( HB_GPOSHeader* gpos ); + + +HB_Error HB_GPOS_Select_Script( HB_GPOSHeader* gpos, + HB_UInt script_tag, + HB_UShort* script_index ); + +HB_Error HB_GPOS_Select_Language( HB_GPOSHeader* gpos, + HB_UInt language_tag, + HB_UShort script_index, + HB_UShort* language_index, + HB_UShort* req_feature_index ); + +HB_Error HB_GPOS_Select_Feature( HB_GPOSHeader* gpos, + HB_UInt feature_tag, + HB_UShort script_index, + HB_UShort language_index, + HB_UShort* feature_index ); + + +HB_Error HB_GPOS_Query_Scripts( HB_GPOSHeader* gpos, + HB_UInt** script_tag_list ); + +HB_Error HB_GPOS_Query_Languages( HB_GPOSHeader* gpos, + HB_UShort script_index, + HB_UInt** language_tag_list ); + +HB_Error HB_GPOS_Query_Features( HB_GPOSHeader* gpos, + HB_UShort script_index, + HB_UShort language_index, + HB_UInt** feature_tag_list ); + + +HB_Error HB_GPOS_Add_Feature( HB_GPOSHeader* gpos, + HB_UShort feature_index, + HB_UInt property ); + +HB_Error HB_GPOS_Clear_Features( HB_GPOSHeader* gpos ); + + +HB_Error HB_GPOS_Register_MM_Function( HB_GPOSHeader* gpos, + HB_MMFunction mmfunc, + void* data ); + +/* If `dvi' is TRUE, glyph contour points for anchor points and device + tables are ignored -- you will get device independent values. */ + + +HB_Error HB_GPOS_Apply_String( HB_Font font, + HB_GPOSHeader* gpos, + HB_UShort load_flags, + HB_Buffer buffer, + HB_Bool dvi, + HB_Bool r2l ); + +HB_END_HEADER + +#endif /* HARFBUZZ_GPOS_H */ |