cffobjs.c

奇趣公司比较新的qt/emd版本

/***************************************************************************/
/*                                                                         */
/*  cffobjs.c                                                              */
/*                                                                         */
/*    OpenType objects manager (body).                                     */
/*                                                                         */
/*  Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007 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.                                        */
/*                                                                         */
/***************************************************************************/


#include <ft2build.h>
#include FT_INTERNAL_DEBUG_H
#include FT_INTERNAL_CALC_H
#include FT_INTERNAL_STREAM_H
#include FT_ERRORS_H
#include FT_TRUETYPE_IDS_H
#include FT_TRUETYPE_TAGS_H
#include FT_INTERNAL_SFNT_H
#include FT_SERVICE_POSTSCRIPT_CMAPS_H
#include FT_INTERNAL_POSTSCRIPT_HINTS_H
#include "cffobjs.h"
#include "cffload.h"
#include "cffcmap.h"
#include "cfferrs.h"


  /*************************************************************************/
  /*                                                                       */
  /* The macro FT_COMPONENT is used in trace mode.  It is an implicit      */
  /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log  */
  /* messages during execution.                                            */
  /*                                                                       */
#undef  FT_COMPONENT
#define FT_COMPONENT  trace_cffobjs


  /*************************************************************************/
  /*                                                                       */
  /*                            SIZE FUNCTIONS                             */
  /*                                                                       */
  /*  Note that we store the global hints in the size's `internal' root    */
  /*  field.                                                               */
  /*                                                                       */
  /*************************************************************************/


  static PSH_Globals_Funcs
  cff_size_get_globals_funcs( CFF_Size  size )
  {
    CFF_Face          face     = (CFF_Face)size->root.face;
    CFF_Font          font     = (CFF_FontRec *)face->extra.data;
    PSHinter_Service  pshinter = (PSHinter_Service)font->pshinter;
    FT_Module         module;


    module = FT_Get_Module( size->root.face->driver->root.library,
                            "pshinter" );
    return ( module && pshinter && pshinter->get_globals_funcs )
           ? pshinter->get_globals_funcs( module )
           : 0;
  }


  FT_LOCAL_DEF( void )
  cff_size_done( FT_Size  cffsize )        /* CFF_Size */
  {
    CFF_Size  size = (CFF_Size)cffsize;


    if ( cffsize->internal )
    {
      PSH_Globals_Funcs  funcs;


      funcs = cff_size_get_globals_funcs( size );
      if ( funcs )
        funcs->destroy( (PSH_Globals)cffsize->internal );

      cffsize->internal = 0;
    }
  }


  FT_LOCAL_DEF( FT_Error )
  cff_size_init( FT_Size  cffsize )         /* CFF_Size */
  {
    CFF_Size           size  = (CFF_Size)cffsize;
    FT_Error           error = CFF_Err_Ok;
    PSH_Globals_Funcs  funcs = cff_size_get_globals_funcs( size );


    if ( funcs )
    {
      PSH_Globals    globals;
      CFF_Face       face    = (CFF_Face)cffsize->face;
      CFF_Font       font    = (CFF_FontRec *)face->extra.data;
      CFF_SubFont    subfont = &font->top_font;

      CFF_Private    cpriv   = &subfont->private_dict;
      PS_PrivateRec  priv;


      /* IMPORTANT: The CFF and Type1 private dictionaries have    */
      /*            slightly different structures; we need to      */
      /*            synthetize a type1 dictionary on the fly here. */

      {
        FT_UInt  n, count;


        FT_MEM_ZERO( &priv, sizeof ( priv ) );

        count = priv.num_blue_values = cpriv->num_blue_values;
        for ( n = 0; n < count; n++ )
          priv.blue_values[n] = (FT_Short)cpriv->blue_values[n];

        count = priv.num_other_blues = cpriv->num_other_blues;
        for ( n = 0; n < count; n++ )
          priv.other_blues[n] = (FT_Short)cpriv->other_blues[n];

        count = priv.num_family_blues = cpriv->num_family_blues;
        for ( n = 0; n < count; n++ )
          priv.family_blues[n] = (FT_Short)cpriv->family_blues[n];

        count = priv.num_family_other_blues = cpriv->num_family_other_blues;
        for ( n = 0; n < count; n++ )
          priv.family_other_blues[n] = (FT_Short)cpriv->family_other_blues[n];

        priv.blue_scale = cpriv->blue_scale;
        priv.blue_shift = (FT_Int)cpriv->blue_shift;
        priv.blue_fuzz  = (FT_Int)cpriv->blue_fuzz;

        priv.standard_width[0]  = (FT_UShort)cpriv->standard_width;
        priv.standard_height[0] = (FT_UShort)cpriv->standard_height;

        count = priv.num_snap_widths = cpriv->num_snap_widths;
        for ( n = 0; n < count; n++ )
          priv.snap_widths[n] = (FT_Short)cpriv->snap_widths[n];

        count = priv.num_snap_heights = cpriv->num_snap_heights;
        for ( n = 0; n < count; n++ )
          priv.snap_heights[n] = (FT_Short)cpriv->snap_heights[n];

        priv.force_bold     = cpriv->force_bold;
        priv.language_group = cpriv->language_group;
        priv.lenIV          = cpriv->lenIV;
      }

      error = funcs->create( cffsize->face->memory, &priv, &globals );
      if ( !error )
        cffsize->internal = (FT_Size_Internal)(void*)globals;
    }

    size->strike_index = 0xFFFFFFFFUL;

    return error;
  }


#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS

  FT_LOCAL_DEF( FT_Error )
  cff_size_select( FT_Size   size,
                   FT_ULong  strike_index )
  {
    CFF_Size           cffsize = (CFF_Size)size;
    PSH_Globals_Funcs  funcs;


    cffsize->strike_index = strike_index;

    FT_Select_Metrics( size->face, strike_index );

    funcs = cff_size_get_globals_funcs( cffsize );

    if ( funcs )
      funcs->set_scale( (PSH_Globals)size->internal,
                        size->metrics.x_scale,
                        size->metrics.y_scale,
                        0, 0 );

    return CFF_Err_Ok;
  }

#endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */


  FT_LOCAL_DEF( FT_Error )
  cff_size_request( FT_Size          size,
                    FT_Size_Request  req )
  {
    CFF_Size           cffsize = (CFF_Size)size;
    PSH_Globals_Funcs  funcs;


#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS

    if ( FT_HAS_FIXED_SIZES( size->face ) )
    {
      CFF_Face      cffface = (CFF_Face)size->face;
      SFNT_Service  sfnt    = (SFNT_Service)cffface->sfnt;
      FT_ULong      strike_index;


      if ( sfnt->set_sbit_strike( cffface, req, &strike_index ) )
        cffsize->strike_index = 0xFFFFFFFFUL;
      else
        return cff_size_select( size, strike_index );
    }

#endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */

    FT_Request_Metrics( size->face, req );

    funcs = cff_size_get_globals_funcs( cffsize );

    if ( funcs )
      funcs->set_scale( (PSH_Globals)size->internal,
                        size->metrics.x_scale,
                        size->metrics.y_scale,
                        0, 0 );

    return CFF_Err_Ok;
  }


  /*************************************************************************/
  /*                                                                       */
  /*                            SLOT  FUNCTIONS                            */
  /*                                                                       */
  /*************************************************************************/

  FT_LOCAL_DEF( void )
  cff_slot_done( FT_GlyphSlot  slot )
  {
    slot->internal->glyph_hints = 0;
  }


  FT_LOCAL_DEF( FT_Error )
  cff_slot_init( FT_GlyphSlot  slot )
  {
    CFF_Face          face     = (CFF_Face)slot->face;
    CFF_Font          font     = (CFF_FontRec *)face->extra.data;
    PSHinter_Service  pshinter = (PSHinter_Service)font->pshinter;


    if ( pshinter )
    {
      FT_Module  module;


      module = FT_Get_Module( slot->face->driver->root.library,
                              "pshinter" );
      if ( module )
      {
        T2_Hints_Funcs  funcs;


        funcs = pshinter->get_t2_funcs( module );
        slot->internal->glyph_hints = (void*)funcs;
      }
    }

    return 0;
  }


  /*************************************************************************/
  /*                                                                       */
  /*                           FACE  FUNCTIONS                             */
  /*                                                                       */
  /*************************************************************************/

  static FT_String*
  cff_strcpy( FT_Memory         memory,
              const FT_String*  source )
  {
    FT_Error    error;
    FT_String*  result;


    result = ft_mem_strdup( memory, source, &error );

    return result;
  }


  FT_LOCAL_DEF( FT_Error )
  cff_face_init( FT_Stream      stream,
                 FT_Face        cffface,        /* CFF_Face */
                 FT_Int         face_index,
                 FT_Int         num_params,
                 FT_Parameter*  params )
  {
    CFF_Face            face = (CFF_Face)cffface;
    FT_Error            error;
    SFNT_Service        sfnt;
    FT_Service_PsCMaps  psnames;
    PSHinter_Service    pshinter;
    FT_Bool             pure_cff    = 1;
    FT_Bool             sfnt_format = 0;


#if 0
    FT_FACE_FIND_GLOBAL_SERVICE( face, sfnt,     SFNT );
    FT_FACE_FIND_GLOBAL_SERVICE( face, psnames,  POSTSCRIPT_NAMES );
    FT_FACE_FIND_GLOBAL_SERVICE( face, pshinter, POSTSCRIPT_HINTER );

    if ( !sfnt )
      goto Bad_Format;
#else
    sfnt = (SFNT_Service)FT_Get_Module_Interface(
             cffface->driver->root.library, "sfnt" );
    if ( !sfnt )
      goto Bad_Format;

    FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );

    pshinter = (PSHinter_Service)FT_Get_Module_Interface(
                 cffface->driver->root.library, "pshinter" );
#endif

    /* create input stream from resource */
    if ( FT_STREAM_SEEK( 0 ) )
      goto Exit;

    /* check whether we have a valid OpenType file */
    error = sfnt->init_face( stream, face, face_index, num_params, params );
    if ( !error )
    {
      if ( face->format_tag != 0x4F54544FL )  /* `OTTO'; OpenType/CFF font */
      {
        FT_TRACE2(( "[not a valid OpenType/CFF font]\n" ));
        goto Bad_Format;
      }

      /* if we are performing a simple font format check, exit immediately */
      if ( face_index < 0 )
        return CFF_Err_Ok;

      /* UNDOCUMENTED!  A CFF in an SFNT can have only a single font. */
      if ( face_index > 0 )
      {
        FT_ERROR(( "cff_face_init: invalid face index\n" ));
        error = CFF_Err_Invalid_Argument;
        goto Exit;
      }

      sfnt_format = 1;

      /* now, the font can be either an OpenType/CFF font, or an SVG CEF */
      /* font; in the latter case it doesn't have a `head' table         */
      error = face->goto_table( face, TTAG_head, stream, 0 );
      if ( !error )
      {
        pure_cff = 0;

        /* load font directory */
        error = sfnt->load_face( stream, face,
                                 face_index, num_params, params );
        if ( error )
          goto Exit;
      }
      else
      {
        /* load the `cmap' table explicitly */
        error = sfnt->load_cmap( face, stream );
        if ( error )
          goto Exit;

        /* XXX: we don't load the GPOS table, as OpenType Layout     */
        /* support will be added later to a layout library on top of */
        /* FreeType 2                                                */
      }

      /* now load the CFF part of the file */
      error = face->goto_table( face, TTAG_CFF, stream, 0 );
      if ( error )
        goto Exit;
    }
    else
    {
      /* rewind to start of file; we are going to load a pure-CFF font */