| /***************************************************************************/ |
| /* */ |
| /* otlayout.h */ |
| /* */ |
| /* OpenType layout type definitions (specification only). */ |
| /* */ |
| /* 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 OTLAYOUT_H |
| #define OTLAYOUT_H |
| |
| #include <tttypes.h> |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Struct> */ |
| /* OTL_LangSys */ |
| /* */ |
| /* <Description> */ |
| /* An OTL LangSys record. */ |
| /* */ |
| /* <Fields> */ |
| /* lang_tag :: The language tag. */ |
| /* lang_offset :: The offset of the langsys data in the |
| /* resource. */ |
| /* */ |
| /* lookup_order :: Always 0 for OTL 1.0. */ |
| /* req_feature_index :: The `required feature' index. */ |
| /* num_feature_indices :: The number of feature indices. */ |
| /* feature_indices :: An array of feature indices. */ |
| /* */ |
| typedef struct OTL_LangSys_ |
| { |
| TT_ULong lang_tag; |
| TT_ULong lang_offset; |
| |
| TT_UShort lookup_order; /* always 0 for TT Open 1.0 */ |
| TT_UShort req_feature_index; /* required FeatureIndex */ |
| TT_UShort num_feature_indices; /* number of Feature indices */ |
| TT_UShort* feature_indices; /* array of Feature indices */ |
| |
| } OTL_LangSys; |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Struct> */ |
| /* OTL_Script */ |
| /* */ |
| /* <Description> */ |
| /* An OTL Script record. */ |
| /* */ |
| /* <Fields> */ |
| /* script_tag :: The script tag. */ |
| /* script_offset :: The offset of the script data in the resource. */ |
| /* */ |
| /* num_langsys :: The number of langsys records. */ |
| /* langsys :: An array of langsys records. */ |
| /* langsys_default :: A pointer to the default langsys table for this */ |
| /* script. */ |
| /* */ |
| typedef struct OTL_Script_ |
| { |
| TT_ULong script_tag; |
| TT_ULong script_offset; |
| |
| TT_UShort num_langsys; |
| OTL_LangSys* langsys; |
| OTL_LangSys* langsys_default; |
| |
| } OTL_Script; |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Struct> */ |
| /* OTL_Script_List */ |
| /* */ |
| /* <Description> */ |
| /* An OTL Script List record. */ |
| /* */ |
| /* <Fields> */ |
| /* num_scripts :: The number of scripts records. */ |
| /* scripts :: An array of script records. */ |
| /* */ |
| typedef struct OTL_Script_List_ |
| { |
| TT_UShort num_scripts; |
| OTL_Script* scripts; |
| |
| } OTL_Script_List; |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Struct> */ |
| /* OTL_Feature */ |
| /* */ |
| /* <Description> */ |
| /* An OTL Feature record. */ |
| /* */ |
| /* <Fields> */ |
| /* feature_tag :: The feature tag. */ |
| /* feature_offset :: The offset of the feature data in the resource. */ |
| /* */ |
| /* feature_params :: Always 0 for OpenType Layout 1.0. */ |
| /* num_lookups :: The number of lookup indices. */ |
| /* lookups :: An array of lookup indices. */ |
| /* */ |
| typedef struct OTL_Feature_ |
| { |
| TT_ULong feature_tag; |
| TT_ULong feature_offset; |
| |
| TT_UShort feature_params; /* always 0 for OpenType Layout 1.0 */ |
| TT_UShort num_lookups; |
| TT_UShort* lookups; |
| |
| } OTL_Feature; |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Struct> */ |
| /* OTL_Feature_List */ |
| /* */ |
| /* <Description> */ |
| /* An OTL Feature List record. */ |
| /* */ |
| /* <Fields> */ |
| /* num_features :: The number of features. */ |
| /* features :: An array of features. */ |
| /* */ |
| typedef struct OTL_Feature_List_ |
| { |
| TT_UShort num_features; |
| OTL_Feature* features; |
| |
| } OTL_Feature_List; |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Struct> */ |
| /* OTL_Lookup */ |
| /* */ |
| /* <Description> */ |
| /* An OTL Lookup record. */ |
| /* */ |
| /* <Fields> */ |
| /* lookup_offset :: The offset of the lookup data in the resource. */ |
| /* lookup_type :: The lookup type. */ |
| /* lookup_flag :: The lookup bit flags. */ |
| /* */ |
| /* num_subtables :: The number of subtables. */ |
| /* subtable_offsets :: An array of offsets to the subtables. */ |
| /* subtables :: An array of pointers to the subtable records. */ |
| /* */ |
| /* <Note> */ |
| /* The format of each lookup sub-table is determined by the parent */ |
| /* OpenType table, and cannot be known here. */ |
| /* */ |
| /* The `subtable_offsets' array is filled when the lookup table is */ |
| /* loaded the first time. It is up to OT table handlers to read the */ |
| /* corresponding sub-table records and store them in the `subtables' */ |
| /* array. */ |
| /* */ |
| typedef struct OTL_Lookup_ |
| { |
| TT_ULong lookup_offset; |
| TT_UShort lookup_type; |
| TT_UShort lookup_flag; |
| |
| TT_UShort num_subtables; |
| TT_ULong* subtable_offsets; |
| void** subtables; |
| |
| } OTL_Lookup; |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Struct> */ |
| /* OTL_Lookup_List */ |
| /* */ |
| /* <Description> */ |
| /* An OTL Lookup List record. */ |
| /* */ |
| /* <Fields> */ |
| /* num_lookups :: The number of lookups. */ |
| /* lookups :: An array of lookups. */ |
| /* */ |
| typedef struct OTL_Lookup_List_ |
| { |
| TT_UShort num_lookups; |
| OTL_Lookup* lookups; |
| |
| } OTL_Lookup_List; |
| |
| |
| #define OTL_LOOKUP_FLAG_RIGHT_TO_LEFT 1 |
| #define OTL_LOOKUP_FLAG_IGNORE_BASE_GLYPHS 2 |
| #define OTL_LOOKUP_FLAG_IGNORE_LIGATURES 4 |
| #define OTL_LOOKUP_FLAG_IGNORE_MARKS 8 |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Struct> */ |
| /* OTL_SubTable1 */ |
| /* */ |
| /* <Description> */ |
| /* The first generic OTL sub-table format. */ |
| /* */ |
| /* <Fields> */ |
| /* num_indices :: The number of indices. */ |
| /* indices :: An array of indices. */ |
| /* data :: A generic value. */ |
| /* */ |
| typedef struct OTL_SubTable1_ |
| { |
| TT_UShort num_indices; |
| TT_UShort* indices; |
| TT_UShort data; |
| |
| } OTL_SubTable1; |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Struct> */ |
| /* OTL_SubTable2_Rec */ |
| /* */ |
| /* <Description> */ |
| /* A record for the second generic OTL sub-table format. */ |
| /* */ |
| /* <Fields> */ |
| /* start :: The first element in the range. */ |
| /* end :: The last element in the range. */ |
| /* data :: A generic value. */ |
| /* */ |
| typedef struct OTL_SubTable2_Rec_ |
| { |
| TT_UShort start; |
| TT_UShort end; |
| TT_UShort data; |
| |
| } OTL_SubTable2_Rec; |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Struct> */ |
| /* OTL_SubTable2 */ |
| /* */ |
| /* <Description> */ |
| /* The second generic OTL sub-table format. */ |
| /* */ |
| /* <Fields> */ |
| /* num_ranges :: The number of ranges. */ |
| /* ranges :: An array of ranges. */ |
| /* */ |
| typedef struct OTL_SubTable2_ |
| { |
| TT_UShort num_ranges; |
| OTL_SubTable2_Rec* ranges; |
| |
| } OTL_SubTable2; |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Struct> */ |
| /* OTL_SubTable */ |
| /* */ |
| /* <Description> */ |
| /* A generic OTL sub-table which is a union of two possible formats */ |
| /* just defined. */ |
| /* */ |
| /* <Fields> */ |
| /* format :: The format of the sub-table. */ |
| /* set :: A union of `format1' and `format2', representing */ |
| /* sub-tables. */ |
| /* */ |
| typedef struct OTL_SubTable_ |
| { |
| TT_UShort format; |
| |
| union |
| { |
| OTL_SubTable1 format1; |
| OTL_SubTable2 format2; |
| |
| } set; |
| |
| } OTL_SubTable; |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Struct> */ |
| /* OTL_Coverage */ |
| /* */ |
| /* <Description> */ |
| /* An OTL Coverage sub-table. */ |
| /* */ |
| typedef OTL_SubTable OTL_Coverage; |
| typedef OTL_SubTable1 OTL_Coverage1; |
| typedef OTL_SubTable2 OTL_Coverage2; |
| typedef OTL_SubTable2_Rec OTL_Coverage2_Rec; |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Struct> */ |
| /* OTL_Class_Def */ |
| /* */ |
| /* <Description> */ |
| /* An OTL Class Definition sub-table. */ |
| /* */ |
| typedef OTL_SubTable OTL_Class_Def; |
| typedef OTL_SubTable1 OTL_Class_Def1; |
| typedef OTL_SubTable2 OTL_Class_Def2; |
| typedef OTL_SubTable2_Rec OTL_Class_Def2_Rec; |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Struct> */ |
| /* OTL_Device */ |
| /* */ |
| /* <Description> */ |
| /* An OTL Device sub-table */ |
| /* */ |
| /* <Fields> */ |
| /* start_size :: The smallest size to correct. */ |
| /* end_size :: The largest size to correct. */ |
| /* delta_format :: The format of the `delta_values' array. */ |
| /* delta_values :: An array of compressed delta values. */ |
| typedef struct OTL_Device_ |
| { |
| TT_UShort start_size; |
| TT_UShort end_size; |
| TT_UShort delta_format; |
| TT_UShort* delta_values; |
| |
| } OTL_Device; |
| |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* OTLAYOUT_H */ |
| |
| |
| /* END */ |
