cf2ft.h

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Author : Dave Arnold
Date : 2016-12-15 21:56:44
Hash : edf40148
Message : [cff] Implement CFF2 support (2/2). The font variation code. All parts dependent on the GX code in the `truetype' module are guarded with TT_CONFIG_OPTION_GX_VAR_SUPPORT. In other words, you can still compile the `cff' module without defining TT_CONFIG_OPTION_GX_VAR_SUPPORT (which brings you CFF2 support without font variation). * src/cff/cf2font.c (cf2_font_setup): Add support for font variation. * src/cff/cf2font.h (CF2_Font): Add fields for variation data. * src/cff/cf2ft.c (cf2_free_instance): Free blend data. (cf2_getVStore, cf2_getNormalizedVector): New functions. * src/cff/cf2ft.h: Updated. * src/cff/cf2intrp.c: Include `cffload.h'. (cf2_cmdRESERVED_15, cf2_cmdRESERVED_16): Replace with... (cf2_cmdVSINDEX, cf2_cmdBLEND): ... this new enum values. (cf2_doBlend): New function. (cf2_interpT2CharString): Handle `vsindex' and `blend' opcodes. * src/cff/cffload.c (FT_fdot14ToFixed): New macro. (cff_vstore_done, cff_vstore_load): New functions. (cff_blend_clear, cff_blend_doBlend, cff_blend_build_vector, cff_blend_check_vector): New functions. (cff_load_private_dict): Add arguments for blend vector. Handle blend data. (cff_subfont_load, cff_subfont_done): Updated. (cff_font_load): Handle CFF2 variation store data. (cff_font_done): Updated. * src/cff/cffload.h: Include `cffparse.h'. Updated. * src/cff/cffobjs.c (cff_face_done): Updated. * src/cff/cffparse.c: Include `cffload.h'. (cff_parse_num): Handle internal value 255. (cff_parse_vsindex, cff_parse_blend): New functions. (CFF_FIELD_BLEND): New macro. (cff_parser_run): Updated. * src/cff/cffparse.h (cff_kind_blend): New enum value. * src/cff/cfftoken.h: Handle `vstore', `vsindex', and `blend' dictionary values. * src/cff/cfftypes.h (CFF_VarData, CFF_AxisCoords, CFF_VarRegion, CFF_VStore, CFF_Blend): New structures. (CFF_FontRecDict): Add `vstore_offset' field. (CFF_Private): Add `vsindex' field. (CFF_SubFont): Add fields for blend data. (CFF_Font): Add `vstore' field. * src/truetype/ttgxvar.c (TT_Get_MM_Var): `CFF2' is equal to `gvar', since glyph variation data is directly embedded. (TT_Set_MM_Blend): Don't load `gvar' table for CFF2 fonts.

src/cff/cf2ft.h

/***************************************************************************/
/*                                                                         */
/*  cf2ft.h                                                                */
/*                                                                         */
/*    FreeType Glue Component to Adobe's Interpreter (specification).      */
/*                                                                         */
/*  Copyright 2013 Adobe Systems Incorporated.                             */
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/*  used, modified, and distributed under the FreeType Project License,    */
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/*                                                                         */
/***************************************************************************/


#ifndef CF2FT_H_
#define CF2FT_H_


#include "cf2types.h"


  /* TODO: disable asserts for now */
#define CF2_NDEBUG


#include FT_SYSTEM_H

#include "cf2glue.h"
#include "cffgload.h"    /* for CFF_Decoder */


FT_BEGIN_HEADER


  FT_LOCAL( FT_Error )
  cf2_decoder_parse_charstrings( CFF_Decoder*  decoder,
                                 FT_Byte*      charstring_base,
                                 FT_ULong      charstring_len );

  FT_LOCAL( CFF_SubFont )
  cf2_getSubfont( CFF_Decoder*  decoder );

  FT_LOCAL( CFF_VStore )
  cf2_getVStore( CFF_Decoder*  decoder );

  FT_LOCAL( FT_UInt )
  cf2_getMaxstack( CFF_Decoder*  decoder );

#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
  FT_LOCAL( FT_Error )
  cf2_getNormalizedVector( CFF_Decoder*  decoder,
                           CF2_UInt     *len,
                           FT_Fixed*    *vec );
#endif

  FT_LOCAL( CF2_Fixed )
  cf2_getPpemY( CFF_Decoder*  decoder );
  FT_LOCAL( CF2_Fixed )
  cf2_getStdVW( CFF_Decoder*  decoder );
  FT_LOCAL( CF2_Fixed )
  cf2_getStdHW( CFF_Decoder*  decoder );

  FT_LOCAL( void )
  cf2_getBlueMetrics( CFF_Decoder*  decoder,
                      CF2_Fixed*    blueScale,
                      CF2_Fixed*    blueShift,
                      CF2_Fixed*    blueFuzz );
  FT_LOCAL( void )
  cf2_getBlueValues( CFF_Decoder*  decoder,
                     size_t*       count,
                     FT_Pos*      *data );
  FT_LOCAL( void )
  cf2_getOtherBlues( CFF_Decoder*  decoder,
                     size_t*       count,
                     FT_Pos*      *data );
  FT_LOCAL( void )
  cf2_getFamilyBlues( CFF_Decoder*  decoder,
                      size_t*       count,
                      FT_Pos*      *data );
  FT_LOCAL( void )
  cf2_getFamilyOtherBlues( CFF_Decoder*  decoder,
                           size_t*       count,
                           FT_Pos*      *data );

  FT_LOCAL( CF2_Int )
  cf2_getLanguageGroup( CFF_Decoder*  decoder );

  FT_LOCAL( CF2_Int )
  cf2_initGlobalRegionBuffer( CFF_Decoder*  decoder,
                              CF2_Int       subrNum,
                              CF2_Buffer    buf );
  FT_LOCAL( FT_Error )
  cf2_getSeacComponent( CFF_Decoder*  decoder,
                        CF2_Int       code,
                        CF2_Buffer    buf );
  FT_LOCAL( void )
  cf2_freeSeacComponent( CFF_Decoder*  decoder,
                         CF2_Buffer    buf );
  FT_LOCAL( CF2_Int )
  cf2_initLocalRegionBuffer( CFF_Decoder*  decoder,
                             CF2_Int       subrNum,
                             CF2_Buffer    buf );

  FT_LOCAL( CF2_Fixed )
  cf2_getDefaultWidthX( CFF_Decoder*  decoder );
  FT_LOCAL( CF2_Fixed )
  cf2_getNominalWidthX( CFF_Decoder*  decoder );


  /*
   * FreeType client outline
   *
   * process output from the charstring interpreter
   */
  typedef struct  CF2_OutlineRec_
  {
    CF2_OutlineCallbacksRec  root;        /* base class must be first */
    CFF_Decoder*             decoder;

  } CF2_OutlineRec, *CF2_Outline;


  FT_LOCAL( void )
  cf2_outline_reset( CF2_Outline  outline );
  FT_LOCAL( void )
  cf2_outline_close( CF2_Outline  outline );


FT_END_HEADER


#endif /* CF2FT_H_ */


/* END */

kc3-lang/freetype/src/cff/cf2ft.h

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kc3-lang/freetype /src/cff/cf2ft.h