t1objs.c

一个Xpdf应用的例子

/***************************************************************************/
/*                                                                         */
/*  t1objs.c                                                               */
/*                                                                         */
/*    Type 1 objects manager (body).                                       */
/*                                                                         */
/*  Copyright 1996-2001 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_STREAM_H

#include <string.h>         /* strcmp() */

#include "t1gload.h"
#include "t1load.h"

#include "t1errors.h"

#ifndef T1_CONFIG_OPTION_NO_AFM
#include "t1afm.h"
#endif

#include FT_INTERNAL_POSTSCRIPT_NAMES_H
#include FT_INTERNAL_POSTSCRIPT_AUX_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_t1objs


  /*************************************************************************/
  /*                                                                       */
  /*                            SIZE FUNCTIONS                             */
  /*                                                                       */
  /*  note that we store the global hints in the size's "internal" root    */
  /*  field                                                                */
  /*                                                                       */
  /*************************************************************************/


  static PSH_Globals_Funcs
  T1_Size_Get_Globals_Funcs( T1_Size  size )
  {
    T1_Face              face     = (T1_Face)size->root.face;
    PSHinter_Interface*  pshinter = (PSHinter_Interface *)face->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
  T1_Size_Done( T1_Size  size )
  {
    if ( size->root.internal )
    {
      PSH_Globals_Funcs  funcs;
    

      funcs = T1_Size_Get_Globals_Funcs( size );
      if ( funcs )
        funcs->destroy( (PSH_Globals)size->root.internal );

      size->root.internal = 0;
    }
  }


  FT_LOCAL_DEF FT_Error
  T1_Size_Init( T1_Size  size )
  {
    FT_Error           error = 0;
    PSH_Globals_Funcs  funcs = T1_Size_Get_Globals_Funcs( size );
    

    if ( funcs )
    {
      PSH_Globals  globals;
      T1_Face      face = (T1_Face)size->root.face;
      

      error = funcs->create( size->root.face->memory, 
                             &face->type1.private_dict, &globals );
      if ( !error )
        size->root.internal = (FT_Size_Internal)(void*)globals;
    }
    
    return error;
  }


  FT_LOCAL_DEF FT_Error
  T1_Size_Reset( T1_Size  size )
  {
    PSH_Globals_Funcs  funcs = T1_Size_Get_Globals_Funcs( size );
    FT_Error           error = 0;

    
    if ( funcs )
      error = funcs->set_scale( (PSH_Globals)size->root.internal,
                                 size->root.metrics.x_scale,
                                 size->root.metrics.y_scale,
                                 0, 0 );
    return error;
  }


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

  FT_LOCAL_DEF void
  T1_GlyphSlot_Done( T1_GlyphSlot  slot )
  {
    slot->root.internal->glyph_hints = 0;
  }


  FT_LOCAL_DEF FT_Error
  T1_GlyphSlot_Init( T1_GlyphSlot   slot )
  {  
    T1_Face              face;
    PSHinter_Interface*  pshinter;


    face     = (T1_Face) slot->root.face;
    pshinter = (PSHinter_Interface *)face->pshinter;
    if ( pshinter )
    {
      FT_Module  module;
      

      module = FT_Get_Module( slot->root.face->driver->root.library, "pshinter" );
      if (module)
      {
        T1_Hints_Funcs  funcs;
        
        funcs = pshinter->get_t1_funcs( module );
        slot->root.internal->glyph_hints = (void*)funcs;
      }
    }
    return 0;
  }
  
  
  /*************************************************************************/
  /*                                                                       */
  /*                            FACE  FUNCTIONS                            */
  /*                                                                       */
  /*************************************************************************/


  /*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    T1_Face_Done                                                       */
  /*                                                                       */
  /* <Description>                                                         */
  /*    The face object destructor.                                        */
  /*                                                                       */
  /* <Input>                                                               */
  /*    face :: A typeless pointer to the face object to destroy.          */
  /*                                                                       */
  FT_LOCAL_DEF void
  T1_Face_Done( T1_Face  face )
  {
    FT_Memory  memory;
    T1_Font*   type1 = &face->type1;


    if ( face )
    {
      memory = face->root.memory;

#ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT
      /* release multiple masters information */
      T1_Done_Blend( face );
      face->blend = 0;
#endif

      /* release font info strings */
      {
        T1_FontInfo*  info = &type1->font_info;


        FREE( info->version );
        FREE( info->notice );
        FREE( info->full_name );
        FREE( info->family_name );
        FREE( info->weight );
      }

      /* release top dictionary */
      FREE( type1->charstrings_len );
      FREE( type1->charstrings );
      FREE( type1->glyph_names );

      FREE( type1->subrs );
      FREE( type1->subrs_len );

      FREE( type1->subrs_block );
      FREE( type1->charstrings_block );
      FREE( type1->glyph_names_block );

      FREE( type1->encoding.char_index );
      FREE( type1->encoding.char_name );
      FREE( type1->font_name );

#ifndef T1_CONFIG_OPTION_NO_AFM
      /* release afm data if present */
      if ( face->afm_data )
        T1_Done_AFM( memory, (T1_AFM*)face->afm_data );
#endif

      /* release unicode map, if any */
      FREE( face->unicode_map.maps );
      face->unicode_map.num_maps = 0;

      face->root.family_name = 0;
      face->root.style_name  = 0;
    }
  }


  /*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    T1_Face_Init                                                       */
  /*                                                                       */
  /* <Description>                                                         */
  /*    The face object constructor.                                       */
  /*                                                                       */
  /* <Input>                                                               */
  /*    stream     ::  input stream where to load font data.               */
  /*                                                                       */
  /*    face_index :: The index of the font face in the resource.          */
  /*                                                                       */
  /*    num_params :: Number of additional generic parameters.  Ignored.   */
  /*                                                                       */
  /*    params     :: Additional generic parameters.  Ignored.             */
  /*                                                                       */
  /* <InOut>                                                               */
  /*    face       :: The face record to build.                            */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0 means success.                             */
  /*                                                                       */
  FT_LOCAL_DEF FT_Error
  T1_Face_Init( FT_Stream      stream,
                T1_Face        face,
                FT_Int         face_index,
                FT_Int         num_params,
                FT_Parameter*  params )
  {