kc3-lang/freetype/src/type1/t1objs.c

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• Hash : 6930b45f
  Author :
  Date : 2000-07-19T17:13:03
  

  - introduced FT_Get_Glyph_Name (see freetype.h) to access individual glyph names. Changed some drivers to support it through a new interface named "glyph_name". - introduced FT_Get_Sfnt_Name (see ftnames.h) to access the SFNT name table in a TrueType/OpenType file..

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• src/type1/t1objs.c

• /***************************************************************************/
  /*                                                                         */
  /*  t1objs.c                                                               */
  /*                                                                         */
  /*    Type 1 objects manager (body).                                       */
  /*                                                                         */
  /*  Copyright 1996-2000 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 <freetype/internal/ftdebug.h>
  #include <freetype/internal/ftstream.h>
  
  
  #ifdef FT_FLAT_COMPILE
  
  #include "t1gload.h"
  #include "t1load.h"
  #include "t1afm.h"
  
  #ifndef T1_CONFIG_OPTION_DISABLE_HINTER
  #include "t1hinter.h"
  #endif
  
  #else /* FT_FLAT_COMPILE */
  
  #include <type1/t1gload.h>
  #include <type1/t1load.h>
  #include <type1/t1afm.h>
  
  #ifndef T1_CONFIG_OPTION_DISABLE_HINTER
  #include <type1/t1hinter.h>
  #endif
  
  #endif /* FT_FLAT_COMPILE */
  
  
  #include <freetype/internal/psnames.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                             */
    /*                                                                       */
    /*************************************************************************/
  
  
    /*************************************************************************/
    /*                                                                       */
    /* <Function>                                                            */
    /*    T1_Done_Size                                                       */
    /*                                                                       */
    /* <Description>                                                         */
    /*    The Type 1 size object destructor.  Used to discard a given size   */
    /*    object.                                                            */
    /*                                                                       */
    /* <Input>                                                               */
    /*    size :: A handle to the target size object.                        */
    /*                                                                       */
    LOCAL_FUNC
    void  T1_Done_Size( T1_Size  size )
    {
      if ( size )
      {
  
  #ifndef T1_CONFIG_OPTION_DISABLE_HINTER
        T1_Done_Size_Hinter( size );
  #endif
  
        size->valid = 0;
      }
    }
  
  
    /*************************************************************************/
    /*                                                                       */
    /* <Function>                                                            */
    /*    T1_Init_Size                                                       */
    /*                                                                       */
    /* <Description>                                                         */
    /*    The size object initializer.                                       */
    /*                                                                       */
    /* <Input>                                                               */
    /*    size :: A handle to the target size object.                        */
    /*                                                                       */
    /* <Return>                                                              */
    /*    FreeTrue error code.  0 means success.                             */
    /*                                                                       */
    LOCAL_DEF
    FT_Error  T1_Init_Size( T1_Size  size )
    {
      FT_Error  error;
  
  
      size->valid = 0;
  
  #ifndef T1_CONFIG_OPTION_DISABLE_HINTER
      error = T1_New_Size_Hinter( size );
  
      return error;
  #else
  
      FT_UNUSED( error );
  
      return T1_Err_Ok;
  
  #endif
    }
  
  
    /*************************************************************************/
    /*                                                                       */
    /* <Function>                                                            */
    /*    T1_Reset_Size                                                      */
    /*                                                                       */
    /* <Description>                                                         */
    /*    Resets an instance to a new pointsize/transform.  This function is */
    /*    in charge of resetting the blue zones,a s well as the stem snap    */
    /*    tables for a given size.                                           */
    /*                                                                       */
    /* <Input>                                                               */
    /*    size :: The target size object.                                    */
    /*                                                                       */
    /* <Output>                                                              */
    /*    FreeType error code.  0 means success.                             */
    /*                                                                       */
    LOCAL_FUNC
    FT_Error  T1_Reset_Size( T1_Size  size )
    {
      /* recompute ascender, descender, etc. */
      T1_Face           face    = (T1_Face)size->root.face;
      FT_Size_Metrics*  metrics = &size->root.metrics;
  
  
      if ( metrics->x_ppem < 1 || metrics->y_ppem < 1 )
        return FT_Err_Invalid_Argument;
  
      /* Compute root ascender, descender, test height, and max_advance */
      metrics->ascender    = ( FT_MulFix( face->root.ascender,
                                          metrics->y_scale ) + 32 ) & -64;
      metrics->descender   = ( FT_MulFix( face->root.descender,
                                          metrics->y_scale ) + 32 ) & -64;
      metrics->height      = ( FT_MulFix( face->root.height,
                                          metrics->y_scale ) + 32 ) & -64;
      metrics->max_advance = ( FT_MulFix( face->root.max_advance_width,
                                          metrics->x_scale ) + 32 ) & -64;
  
  #ifndef T1_CONFIG_OPTION_DISABLE_HINTER
      return T1_Reset_Size_Hinter( size );
  #else
      return 0;
  #endif
    }
  
  
    /*************************************************************************/
    /*                                                                       */
    /*                            FACE  FUNCTIONS                            */
    /*                                                                       */
    /*************************************************************************/
  
  
    /*************************************************************************/
    /*                                                                       */
    /* <Function>                                                            */
    /*    T1_Done_Face                                                       */
    /*                                                                       */
    /* <Description>                                                         */
    /*    The face object destructor.                                        */
    /*                                                                       */
    /* <Input>                                                               */
    /*    face :: A typeless pointer to the face object to destroy.          */
    /*                                                                       */
    LOCAL_FUNC
    void  T1_Done_Face( T1_Face  face )
    {
      FT_Memory  memory;
      T1_Font*   type1 = &face->type1;
  
  
      if ( face )
      {
        memory = face->root.memory;
  
        /* 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->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_Init_Face                                                       */
    /*                                                                       */
    /* <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.                             */
    /*                                                                       */
    LOCAL_FUNC
    FT_Error  T1_Init_Face( FT_Stream      stream,
                            T1_Face        face,
                            FT_Int         face_index,
                            FT_Int         num_params,
                            FT_Parameter*  params )
    {
      T1_Tokenizer        tokenizer;
      FT_Error            error;
      PSNames_Interface*  psnames;
  
      FT_UNUSED( num_params );
      FT_UNUSED( params );
      FT_UNUSED( face_index );
      FT_UNUSED( face );
  
  
      face->root.num_faces = 1;
  
      psnames = (PSNames_Interface*)face->psnames;
      if ( !psnames )
      {
        psnames = (PSNames_Interface*)
                   FT_Get_Module_Interface( FT_FACE_LIBRARY( face ),
                                            "psnames" );
  
        face->psnames = psnames;
      }
  
      /* open the tokenizer, this will also check the font format */
      error = New_Tokenizer( stream, &tokenizer );
      if ( error )
        goto Fail;
  
      /* if we just wanted to check the format, leave successfully now */
      if ( face_index < 0 )
        goto Leave;
  
      /* check the face index */
      if ( face_index != 0 )
      {
        FT_ERROR(( "T1_Init_Face: invalid face index\n" ));
        error = T1_Err_Invalid_Argument;
        goto Leave;
      }
  
      /* Now, load the font program into the face object */
      {
        T1_Parser  parser;
  
  
        Init_T1_Parser( &parser, face, tokenizer );
        error = Parse_T1_FontProgram( &parser );
        if ( error )
          goto Leave;
  
        /* Init the face object fields */
        /* Now set up root face fields */
        {
          FT_Face   root  = (FT_Face)&face->root;
          T1_Font*  type1 = &face->type1;
  
  
          root->num_glyphs   = type1->num_glyphs;
          root->num_charmaps = 1;
  
          root->face_index = face_index;
          root->face_flags = FT_FACE_FLAG_SCALABLE;
  
          root->face_flags |= FT_FACE_FLAG_HORIZONTAL;
  
          root->face_flags |= FT_FACE_FLAG_GLYPH_NAMES;
          
          if ( type1->font_info.is_fixed_pitch )
            root->face_flags |= FT_FACE_FLAG_FIXED_WIDTH;
  
          /* XXX: TODO -- add kerning with .afm support */
  
          /* get style name - be careful, some broken fonts only */
          /* have a `/FontName' dictionary entry!                */
          root->family_name = type1->font_info.family_name;
          if ( root->family_name )
          {
            char*  full   = type1->font_info.full_name;
            char*  family = root->family_name;
  
  
            while ( *family && *full == *family )
            {
              family++;
              full++;
            }
  
            root->style_name = ( *full == ' ' ? full + 1
                                              : (char *)"Regular" );
          }
          else
          {
            /* do we have a `/FontName'? */
            if (type1->font_name)
            {
              root->family_name = type1->font_name;
              root->style_name  = "Regular";
            }
          }
  
          /* no embedded bitmap support */
          root->num_fixed_sizes = 0;
          root->available_sizes = 0;
  
          root->bbox         = type1->font_bbox;
          root->units_per_EM = 1000;
          root->ascender     =  (FT_Short)type1->font_bbox.yMax;
          root->descender    = -(FT_Short)type1->font_bbox.yMin;
          root->height       = ( ( root->ascender + root->descender) * 12 )
                               / 10;
  
          /* now compute the maximum advance width */
  
          root->max_advance_width = type1->private_dict.standard_width[0];
  
          /* compute max advance width for proportional fonts */
          if ( !type1->font_info.is_fixed_pitch )
          {
            FT_Int  max_advance;
  
  
            error = T1_Compute_Max_Advance( face, &max_advance );
  
            /* in case of error, keep the standard width */
            if ( !error )
              root->max_advance_width = max_advance;
            else
              error = 0;   /* clear error */
          }
  
          root->max_advance_height = root->height;
  
          root->underline_position  = type1->font_info.underline_position;
          root->underline_thickness = type1->font_info.underline_thickness;
  
          root->max_points   = 0;
          root->max_contours = 0;
        }
      }
  
      /* charmap support - synthetize unicode charmap when possible */
      {
        FT_Face     root    = &face->root;
        FT_CharMap  charmap = face->charmaprecs;
  
  
        /* synthesize a Unicode charmap if there is support in the `PSNames' */
        /* module..                                                          */
        if ( face->psnames )
        {
          PSNames_Interface*  psnames = (PSNames_Interface*)face->psnames;
  
  
          if ( psnames->unicode_value )
          {
            error = psnames->build_unicodes(
                      root->memory,
                      face->type1.num_glyphs,
                      (const char**)face->type1.glyph_names,
                      &face->unicode_map );
            if ( !error )
            {
              root->charmap        = charmap;
              charmap->face        = (FT_Face)face;
              charmap->encoding    = ft_encoding_unicode;
              charmap->platform_id = 3;
              charmap->encoding_id = 1;
              charmap++;
            }
  
            /* simply clear the error in case of failure (which really) */
            /* means that out of memory or no unicode glyph names       */
            error = 0;
          }
        }
  
        /* now, support either the standard, expert, or custom encodings */
        charmap->face        = (FT_Face)face;
        charmap->platform_id = 7;  /* a new platform id for Adobe fonts ?? */
  
        switch ( face->type1.encoding_type )
        {
        case t1_encoding_standard:
          charmap->encoding    = ft_encoding_adobe_standard;
          charmap->encoding_id = 0;
          break;
  
        case t1_encoding_expert:
          charmap->encoding    = ft_encoding_adobe_expert;
          charmap->encoding_id = 1;
          break;
  
        default:
          charmap->encoding    = ft_encoding_adobe_custom;
          charmap->encoding_id = 2;
          break;
        }
  
        root->charmaps     = face->charmaps;
        root->num_charmaps = charmap - face->charmaprecs + 1;
        face->charmaps[0]  = &face->charmaprecs[0];
        face->charmaps[1]  = &face->charmaprecs[1];
      }
  
    Leave:
      Done_Tokenizer( tokenizer );
  
    Fail:
      return error;
    }
  
  
    /*************************************************************************/
    /*                                                                       */
    /* <Function>                                                            */
    /*    T1_Done_GlyphSlot                                                  */
    /*                                                                       */
    /* <Description>                                                         */
    /*    The glyph slot object destructor.                                  */
    /*                                                                       */
    /* <Input>                                                               */
    /*    glyph :: The glyph slot handle to destroy.                         */
    /*                                                                       */
    LOCAL_FUNC
    void  T1_Done_GlyphSlot( T1_GlyphSlot  glyph )
    {
  #ifndef T1_CONFIG_OPTION_DISABLE_HINTER
  
      T1_Done_Glyph_Hinter( glyph );
  
  #else
  
      FT_UNUSED( glyph );
  
  #endif
    }
  
  
    /*************************************************************************/
    /*                                                                       */
    /* <Function>                                                            */
    /*    T1_Init_GlyphSlot                                                  */
    /*                                                                       */
    /* <Description>                                                         */
    /*    The glyph slot object constructor.                                 */
    /*                                                                       */
    /* <Input>                                                               */
    /*    glyph :: The glyph slot handle to initialize.                      */
    /*                                                                       */
    LOCAL_FUNC
    FT_Error  T1_Init_GlyphSlot( T1_GlyphSlot  glyph )
    {
      FT_Error    error = FT_Err_Ok;
  
  
  #ifndef T1_CONFIG_OPTION_DISABLE_HINTER
  
      error = T1_New_Glyph_Hinter( glyph );
  
  #else
  
      FT_UNUSED( glyph );
  
  #endif
  
      return error;
    }
  
  
  /* END */
  

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