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Viewing changes to src/3rdparty/freetype/src/truetype/ttgxvar.h

  • Committer: Bazaar Package Importer
  • Author(s): Adam Conrad
  • Date: 2005-08-24 04:09:09 UTC
  • Revision ID: james.westby@ubuntu.com-20050824040909-xmxe9jfr4a0w5671
Tags: upstream-4.0.0
Import upstream version 4.0.0

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src/3rdparty/freetype/src/truetype/ttgxvar.h
 
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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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18
 
 
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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  GX_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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143
 
 
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  FT_LOCAL( 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( 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( 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( 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( 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( 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 */