Werner Lemberg
21 years ago
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05d31dec0e
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dc3daa0089
25 changed files with 2422 additions and 62 deletions
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/***************************************************************************/ |
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/* */ |
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/* ttgxvar.h */ |
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/* */ |
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/* TrueType GX Font Variation loader (specification) */ |
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/* */ |
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/* Copyright 2004 by */ |
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/* David Turner, Robert Wilhelm, Werner Lemberg and George Williams. */ |
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/* */ |
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/* This file is part of the FreeType project, and may only be used, */ |
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/* modified, and distributed under the terms of the FreeType project */ |
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/* license, LICENSE.TXT. By continuing to use, modify, or distribute */ |
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/* this file you indicate that you have read the license and */ |
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/* understand and accept it fully. */ |
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/* */ |
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/***************************************************************************/ |
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#ifndef __TTGXVAR_H__ |
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#define __TTGXVAR_H__ |
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#include <ft2build.h> |
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#include "ttobjs.h" |
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FT_BEGIN_HEADER |
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/*************************************************************************/ |
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/* */ |
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/* <Struct> */ |
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/* GX_AVarCorrespondenceRec */ |
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/* */ |
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/* <Description> */
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/* A data structure representing `shortFracCorrespondence' in `avar' */ |
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/* table according to the specifications from Apple. */ |
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/* */ |
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typedef struct GX_AVarCorrespondenceRec_ |
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{ |
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FT_Fixed fromCoord; |
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FT_Fixed toCoord; |
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} GX_AVarCorrespondenceRec_, *GX_AVarCorrespondence; |
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/*************************************************************************/ |
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/* */ |
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/* <Struct> */ |
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/* GX_AVarRec */ |
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/* */ |
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/* <Description> */ |
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/* Data from the segment field of `avar' table. */ |
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/* There is one of these for each axis. */ |
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/* */ |
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typedef struct GX_AVarSegmentRec_ |
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{ |
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FT_UShort pairCount; |
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GX_AVarCorrespondence correspondence; /* array with pairCount entries */ |
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} GX_AVarSegmentRec, *GX_AVarSegment; |
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/*************************************************************************/ |
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/* */ |
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/* <Struct> */ |
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/* GX_BlendRec */ |
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/* */ |
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/* <Description> */ |
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/* Data for interpolating a font from a distortable font specified */ |
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/* by the GX *var tables ([fgca]var). */ |
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/* */ |
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/* <Fields> */ |
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/* num_axis :: The number of axes along which interpolation */ |
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/* may happen */ |
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/* */ |
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/* normalizedcoords :: A normalized value (between [-1,1]) indicating */ |
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/* the contribution along each axis to the final */ |
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/* interpolated font. */ |
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/* */ |
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typedef struct GS_BlendRec_ |
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{ |
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FT_UInt num_axis; |
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FT_Fixed* normalizedcoords; |
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FT_MM_Var* mmvar; |
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FT_Int mmvar_len; |
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FT_Bool avar_checked; |
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GX_AVarSegment avar_segment; |
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FT_UInt tuplecount; /* shared tuples in `gvar' */ |
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FT_Fixed* tuplecoords; /* tuplecoords[tuplecount][num_axis] */ |
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FT_UInt gv_glyphcnt; |
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FT_ULong* glyphoffsets; |
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} GX_BlendRec; |
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/*************************************************************************/ |
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/* */ |
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/* <enum> */ |
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/* GX_TupleCountFlags */ |
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/* */ |
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/* <Description> */ |
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/* Flags used within the `TupleCount' field of the `gvar' table. */ |
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/* */ |
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typedef enum GX_TupleCountFlags_ |
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{ |
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GX_TC_TUPLES_SHARE_POINT_NUMBERS = 0x8000, |
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GX_TC_RESERVED_TUPLE_FLAGS = 0x7000, |
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GX_TC_TUPLE_COUNT_MASK = 0x0FFF |
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} GX_TupleCountFlags; |
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/*************************************************************************/ |
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/* */ |
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/* <enum> */ |
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/* GX_TupleIndexFlags */ |
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/* */ |
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/* <Description> */ |
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/* Flags used within the `TupleIndex' field of the `gvar' and `cvar' */ |
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/* tables. */ |
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/* */ |
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typedef enum GX_TupleIndexFlags_ |
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{ |
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GX_TI_EMBEDDED_TUPLE_COORD = 0x8000, |
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GX_TI_INTERMEDIATE_TUPLE = 0x4000, |
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GX_TI_PRIVATE_POINT_NUMBERS = 0x2000, |
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GX_TI_RESERVED_TUPLE_FLAG = 0x1000, |
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GX_TI_TUPLE_INDEX_MASK = 0x0FFF |
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} GX_TupleIndexFlags; |
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#define TTAG_wght FT_MAKE_TAG( 'w', 'g', 'h', 't' ) |
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#define TTAG_wdth FT_MAKE_TAG( 'w', 'd', 't', 'h' ) |
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#define TTAG_opsz FT_MAKE_TAG( 'o', 'p', 's', 'z' ) |
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#define TTAG_slnt FT_MAKE_TAG( 's', 'l', 'n', 't' ) |
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FT_LOCAL_DEF( FT_Error ) |
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TT_Set_MM_Blend( TT_Face face, |
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FT_UInt num_coords, |
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FT_Fixed* coords ); |
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FT_LOCAL_DEF( FT_Error ) |
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TT_Set_Var_Design( TT_Face face, |
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FT_UInt num_coords, |
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FT_Fixed* coords ); |
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FT_LOCAL_DEF( FT_Error ) |
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TT_Get_MM_Var( TT_Face face, |
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FT_MM_Var* *master ); |
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FT_LOCAL_DEF( FT_Error ) |
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tt_face_vary_cvt( TT_Face face, |
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FT_Stream stream ); |
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FT_LOCAL_DEF( FT_Error ) |
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TT_Vary_Get_Glyph_Deltas( TT_Face face, |
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FT_UInt glyph_index, |
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FT_Vector* *deltas, |
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FT_UInt n_points ); |
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FT_LOCAL_DEF( void ) |
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tt_done_blend( FT_Memory memory, |
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GX_Blend blend ); |
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FT_END_HEADER |
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#endif /* __TTGXVAR_H__ */ |
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/* END */ |
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