/**************************************************************************** * * ttgxvar.h * * TrueType GX Font Variation loader (specification) * * Copyright (C) 2004-2023 by * David Turner, Robert Wilhelm, Werner Lemberg and George Williams. * * 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 TTGXVAR_H_ #define TTGXVAR_H_ #include <freetype/internal/ftmmtypes.h> #include "ttobjs.h" FT_BEGIN_HEADER #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT /************************************************************************** * * @Struct: * GX_AVarCorrespondenceRec * * @Description: * A data structure representing `shortFracCorrespondence' in `avar' * table according to the specifications from Apple. */ GX_AVarCorrespondence; /************************************************************************** * * @Struct: * GX_AVarRec * * @Description: * Data from the segment field of `avar' table. * There is one of these for each axis. */ GX_AVarSegment; /************************************************************************** * * @Struct: * GX_AVarTableRec * * @Description: * Data from the `avar' table. */ GX_AVarTable; /************************************************************************** * * @Struct: * GX_HVVarTableRec * * @Description: * Data from either the `HVAR' or `VVAR' table. */ GX_HVVarTable; #define MVAR_TAG_GASP_0 … #define MVAR_TAG_GASP_1 … #define MVAR_TAG_GASP_2 … #define MVAR_TAG_GASP_3 … #define MVAR_TAG_GASP_4 … #define MVAR_TAG_GASP_5 … #define MVAR_TAG_GASP_6 … #define MVAR_TAG_GASP_7 … #define MVAR_TAG_GASP_8 … #define MVAR_TAG_GASP_9 … #define MVAR_TAG_CPHT … #define MVAR_TAG_HASC … #define MVAR_TAG_HCLA … #define MVAR_TAG_HCLD … #define MVAR_TAG_HCOF … #define MVAR_TAG_HCRN … #define MVAR_TAG_HCRS … #define MVAR_TAG_HDSC … #define MVAR_TAG_HLGP … #define MVAR_TAG_SBXO … #define MVAR_TAG_SBXS … #define MVAR_TAG_SBYO … #define MVAR_TAG_SBYS … #define MVAR_TAG_SPXO … #define MVAR_TAG_SPXS … #define MVAR_TAG_SPYO … #define MVAR_TAG_SPYS … #define MVAR_TAG_STRO … #define MVAR_TAG_STRS … #define MVAR_TAG_UNDO … #define MVAR_TAG_UNDS … #define MVAR_TAG_VASC … #define MVAR_TAG_VCOF … #define MVAR_TAG_VCRN … #define MVAR_TAG_VCRS … #define MVAR_TAG_VDSC … #define MVAR_TAG_VLGP … #define MVAR_TAG_XHGT … GX_Value; /************************************************************************** * * @Struct: * GX_MVarTableRec * * @Description: * Data from the `MVAR' table. */ GX_MVarTable; /************************************************************************** * * @Struct: * GX_BlendRec * * @Description: * Data for interpolating a font from a distortable font specified * by the GX *var tables ([fgcahvm]var). * * @Fields: * num_axis :: * The number of axes along which interpolation may happen. * * coords :: * An array of design coordinates (in user space) indicating the * contribution along each axis to the final interpolated font. * `normalizedcoords' holds the same values. * * normalizedcoords :: * An array of normalized values (between [-1,1]) indicating the * contribution along each axis to the final interpolated font. * `coords' holds the same values. * * mmvar :: * Data from the `fvar' table. * * mmvar_len :: * The length of the `mmvar' structure. * * normalized_stylecoords :: * A two-dimensional array that holds the named instance data from * `mmvar' as normalized values. * * avar_loaded :: * A Boolean; if set, FreeType tried to load (and parse) the `avar' * table. * * avar_table :: * Data from the `avar' table. * * hvar_loaded :: * A Boolean; if set, FreeType tried to load (and parse) the `hvar' * table. * * hvar_checked :: * A Boolean; if set, FreeType successfully loaded and parsed the * `hvar' table. * * hvar_error :: * If loading and parsing of the `hvar' table failed, this field * holds the corresponding error code. * * hvar_table :: * Data from the `hvar' table. * * vvar_loaded :: * A Boolean; if set, FreeType tried to load (and parse) the `vvar' * table. * * vvar_checked :: * A Boolean; if set, FreeType successfully loaded and parsed the * `vvar' table. * * vvar_error :: * If loading and parsing of the `vvar' table failed, this field * holds the corresponding error code. * * vvar_table :: * Data from the `vvar' table. * * mvar_table :: * Data from the `mvar' table. * * tuplecount :: * The number of shared tuples in the `gvar' table. * * tuplecoords :: * A two-dimensional array that holds the shared tuple coordinates * in the `gvar' table. * * gv_glyphcnt :: * The number of glyphs handled in the `gvar' table. * * glyphoffsets :: * Offsets into the glyph variation data array. * * gvar_size :: * The size of the `gvar' table. */ GX_BlendRec; /************************************************************************** * * @enum: * GX_TupleCountFlags * * @Description: * Flags used within the `TupleCount' field of the `gvar' table. */ GX_TupleCountFlags; /************************************************************************** * * @enum: * GX_TupleIndexFlags * * @Description: * Flags used within the `TupleIndex' field of the `gvar' and `cvar' * tables. */ GX_TupleIndexFlags; #define TTAG_wght … #define TTAG_wdth … #define TTAG_opsz … #define TTAG_slnt … #define TTAG_ital … FT_LOCAL( FT_Error ) TT_Set_MM_Blend( FT_Face face, FT_UInt num_coords, FT_Fixed* coords ); FT_LOCAL( FT_Error ) TT_Get_MM_Blend( FT_Face face, FT_UInt num_coords, FT_Fixed* coords ); FT_LOCAL( FT_Error ) TT_Set_Var_Design( FT_Face face, FT_UInt num_coords, FT_Fixed* coords ); FT_LOCAL( FT_Error ) TT_Get_MM_Var( FT_Face face, FT_MM_Var* *master ); FT_LOCAL( FT_Error ) TT_Get_Var_Design( FT_Face face, FT_UInt num_coords, FT_Fixed* coords ); FT_LOCAL( FT_Error ) TT_Set_Named_Instance( FT_Face face, FT_UInt instance_index ); FT_LOCAL( FT_Error ) TT_Get_Default_Named_Instance( FT_Face face, FT_UInt *instance_index ); FT_LOCAL( void ) tt_construct_ps_name( FT_Face face ); FT_LOCAL( FT_Error ) tt_face_vary_cvt( TT_Face face, FT_Stream stream ); FT_LOCAL( FT_Error ) TT_Vary_Apply_Glyph_Deltas( TT_Loader loader, FT_Outline* outline, FT_Vector* unrounded ); FT_LOCAL( FT_Error ) tt_hadvance_adjust( FT_Face face, FT_UInt gindex, FT_Int *adelta ); FT_LOCAL( FT_Error ) tt_vadvance_adjust( FT_Face face, FT_UInt gindex, FT_Int *adelta ); FT_LOCAL( void ) tt_apply_mvar( FT_Face face ); FT_LOCAL( FT_Error ) tt_var_load_item_variation_store( FT_Face face, FT_ULong offset, GX_ItemVarStore itemStore ); FT_LOCAL( FT_Error ) tt_var_load_delta_set_index_mapping( FT_Face face, FT_ULong offset, GX_DeltaSetIdxMap map, GX_ItemVarStore itemStore, FT_ULong table_len ); FT_LOCAL( FT_ItemVarDelta ) tt_var_get_item_delta( FT_Face face, GX_ItemVarStore itemStore, FT_UInt outerIndex, FT_UInt innerIndex ); FT_LOCAL( void ) tt_var_done_item_variation_store( FT_Face face, GX_ItemVarStore itemStore ); FT_LOCAL( void ) tt_var_done_delta_set_index_map( FT_Face face, GX_DeltaSetIdxMap deltaSetIdxMap ); FT_LOCAL( FT_Error ) tt_get_var_blend( FT_Face face, FT_UInt *num_coords, FT_Fixed* *coords, FT_Fixed* *normalizedcoords, FT_MM_Var* *mm_var ); FT_LOCAL( void ) tt_done_blend( FT_Face face ); #endif /* TT_CONFIG_OPTION_GX_VAR_SUPPORT */ FT_END_HEADER #endif /* TTGXVAR_H_ */ /* END */
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