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

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• Hash : 16586859
  Author :
  Date : 2020-06-13T21:15:45
  

  Remove redundant inclusion of `ft2build.h'. * */*: Remove `#include <ft2build.h>' where possible. * include/freetype/freetype.h: Remove cpp error about missing inclusion of `ft2build.h'.

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• src/type1/t1objs.c

• /****************************************************************************
   *
   * t1objs.c
   *
   *   Type 1 objects manager (body).
   *
   * Copyright (C) 1996-2020 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/ftcalc.h>
  #include <freetype/internal/ftdebug.h>
  #include <freetype/internal/ftstream.h>
  #include <freetype/ttnameid.h>
  #include <freetype/ftdriver.h>
  
  #include "t1gload.h"
  #include "t1load.h"
  
  #include "t1errors.h"
  
  #ifndef T1_CONFIG_OPTION_NO_AFM
  #include "t1afm.h"
  #endif
  
  #include <freetype/internal/services/svpscmap.h>
  #include <freetype/internal/psaux.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  t1objs
  
  
    /**************************************************************************
     *
     *                           SIZE FUNCTIONS
     *
     */
  
  
    static PSH_Globals_Funcs
    T1_Size_Get_Globals_Funcs( T1_Size  size )
    {
      T1_Face           face     = (T1_Face)size->root.face;
      PSHinter_Service  pshinter = (PSHinter_Service)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( FT_Size  t1size )          /* T1_Size */
    {
      T1_Size  size = (T1_Size)t1size;
  
  
      if ( t1size->internal->module_data )
      {
        PSH_Globals_Funcs  funcs;
  
  
        funcs = T1_Size_Get_Globals_Funcs( size );
        if ( funcs )
          funcs->destroy( (PSH_Globals)t1size->internal->module_data );
  
        t1size->internal->module_data = NULL;
      }
    }
  
  
    FT_LOCAL_DEF( FT_Error )
    T1_Size_Init( FT_Size  t1size )      /* T1_Size */
    {
      T1_Size            size  = (T1_Size)t1size;
      FT_Error           error = FT_Err_Ok;
      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 )
          t1size->internal->module_data = globals;
      }
  
      return error;
    }
  
  
    FT_LOCAL_DEF( FT_Error )
    T1_Size_Request( FT_Size          t1size,     /* T1_Size */
                     FT_Size_Request  req )
    {
      T1_Size            size  = (T1_Size)t1size;
      PSH_Globals_Funcs  funcs = T1_Size_Get_Globals_Funcs( size );
  
  
      FT_Request_Metrics( size->root.face, req );
  
      if ( funcs )
        funcs->set_scale( (PSH_Globals)t1size->internal->module_data,
                          size->root.metrics.x_scale,
                          size->root.metrics.y_scale,
                          0, 0 );
  
      return FT_Err_Ok;
    }
  
  
    /**************************************************************************
     *
     *                           SLOT  FUNCTIONS
     *
     */
  
    FT_LOCAL_DEF( void )
    T1_GlyphSlot_Done( FT_GlyphSlot  slot )
    {
      slot->internal->glyph_hints = NULL;
    }
  
  
    FT_LOCAL_DEF( FT_Error )
    T1_GlyphSlot_Init( FT_GlyphSlot  slot )
    {
      T1_Face           face;
      PSHinter_Service  pshinter;
  
  
      face     = (T1_Face)slot->face;
      pshinter = (PSHinter_Service)face->pshinter;
  
      if ( pshinter )
      {
        FT_Module  module;
  
  
        module = FT_Get_Module( slot->face->driver->root.library,
                                "pshinter" );
        if ( module )
        {
          T1_Hints_Funcs  funcs;
  
  
          funcs = pshinter->get_t1_funcs( module );
          slot->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( FT_Face  t1face )         /* T1_Face */
    {
      T1_Face    face = (T1_Face)t1face;
      FT_Memory  memory;
      T1_Font    type1;
  
  
      if ( !face )
        return;
  
      memory = face->root.memory;
      type1  = &face->type1;
  
  #ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT
      /* release multiple masters information */
      FT_ASSERT( ( face->len_buildchar == 0 ) == ( face->buildchar == NULL ) );
  
      if ( face->buildchar )
      {
        FT_FREE( face->buildchar );
  
        face->buildchar     = NULL;
        face->len_buildchar = 0;
      }
  
      T1_Done_Blend( face );
      face->blend = NULL;
  #endif
  
      /* release font info strings */
      {
        PS_FontInfo  info = &type1->font_info;
  
  
        FT_FREE( info->version );
        FT_FREE( info->notice );
        FT_FREE( info->full_name );
        FT_FREE( info->family_name );
        FT_FREE( info->weight );
      }
  
      /* release top dictionary */
      FT_FREE( type1->charstrings_len );
      FT_FREE( type1->charstrings );
      FT_FREE( type1->glyph_names );
  
      FT_FREE( type1->subrs );
      FT_FREE( type1->subrs_len );
  
      ft_hash_num_free( type1->subrs_hash, memory );
      FT_FREE( type1->subrs_hash );
  
      FT_FREE( type1->subrs_block );
      FT_FREE( type1->charstrings_block );
      FT_FREE( type1->glyph_names_block );
  
      FT_FREE( type1->encoding.char_index );
      FT_FREE( type1->encoding.char_name );
      FT_FREE( type1->font_name );
  
  #ifndef T1_CONFIG_OPTION_NO_AFM
      /* release afm data if present */
      if ( face->afm_data )
        T1_Done_Metrics( memory, (AFM_FontInfo)face->afm_data );
  #endif
  
      /* release unicode map, if any */
  #if 0
      FT_FREE( face->unicode_map_rec.maps );
      face->unicode_map_rec.num_maps = 0;
      face->unicode_map              = NULL;
  #endif
  
      face->root.family_name = NULL;
      face->root.style_name  = NULL;
    }
  
  
    /**************************************************************************
     *
     * @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,
                  FT_Face        t1face,          /* T1_Face */
                  FT_Int         face_index,
                  FT_Int         num_params,
                  FT_Parameter*  params )
    {
      T1_Face             face = (T1_Face)t1face;
      FT_Error            error;
      FT_Service_PsCMaps  psnames;
      PSAux_Service       psaux;
      T1_Font             type1 = &face->type1;
      PS_FontInfo         info = &type1->font_info;
  
      FT_UNUSED( num_params );
      FT_UNUSED( params );
      FT_UNUSED( stream );
  
  
      face->root.num_faces = 1;
  
      FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );
      face->psnames = psnames;
  
      face->psaux = FT_Get_Module_Interface( FT_FACE_LIBRARY( face ),
                                             "psaux" );
      psaux = (PSAux_Service)face->psaux;
      if ( !psaux )
      {
        FT_ERROR(( "T1_Face_Init: cannot access `psaux' module\n" ));
        error = FT_THROW( Missing_Module );
        goto Exit;
      }
  
      face->pshinter = FT_Get_Module_Interface( FT_FACE_LIBRARY( face ),
                                                "pshinter" );
  
      FT_TRACE2(( "Type 1 driver\n" ));
  
      /* open the tokenizer; this will also check the font format */
      error = T1_Open_Face( face );
      if ( error )
        goto Exit;
  
      FT_TRACE2(( "T1_Face_Init: %08p (index %d)\n",
                  face,
                  face_index ));
  
      /* if we just wanted to check the format, leave successfully now */
      if ( face_index < 0 )
        goto Exit;
  
      /* check the face index */
      if ( ( face_index & 0xFFFF ) > 0 )
      {
        FT_ERROR(( "T1_Face_Init: invalid face index\n" ));
        error = FT_THROW( Invalid_Argument );
        goto Exit;
      }
  
      /* now load the font program into the face object */
  
      /* initialize the face object fields */
  
      /* set up root face fields */
      {
        FT_Face  root = (FT_Face)&face->root;
  
  
        root->num_glyphs = type1->num_glyphs;
        root->face_index = 0;
  
        root->face_flags |= FT_FACE_FLAG_SCALABLE    |
                            FT_FACE_FLAG_HORIZONTAL  |
                            FT_FACE_FLAG_GLYPH_NAMES |
                            FT_FACE_FLAG_HINTER;
  
        if ( info->is_fixed_pitch )
          root->face_flags |= FT_FACE_FLAG_FIXED_WIDTH;
  
        if ( face->blend )
          root->face_flags |= FT_FACE_FLAG_MULTIPLE_MASTERS;
  
        /* The following code to extract the family and the style is very   */
        /* simplistic and might get some things wrong.  For a full-featured */
        /* algorithm you might have a look at the whitepaper given at       */
        /*                                                                  */
        /*   https://blogs.msdn.com/text/archive/2007/04/23/wpf-font-selection-model.aspx */
  
        /* get style name -- be careful, some broken fonts only */
        /* have a `/FontName' dictionary entry!                 */
        root->family_name = info->family_name;
        root->style_name  = NULL;
  
        if ( root->family_name )
        {
          char*  full   = info->full_name;
          char*  family = root->family_name;
  
  
          if ( full )
          {
            FT_Bool  the_same = TRUE;
  
  
            while ( *full )
            {
              if ( *full == *family )
              {
                family++;
                full++;
              }
              else
              {
                if ( *full == ' ' || *full == '-' )
                  full++;
                else if ( *family == ' ' || *family == '-' )
                  family++;
                else
                {
                  the_same = FALSE;
  
                  if ( !*family )
                    root->style_name = full;
                  break;
                }
              }
            }
  
            if ( the_same )
              root->style_name = (char *)"Regular";
          }
        }
        else
        {
          /* do we have a `/FontName'? */
          if ( type1->font_name )
            root->family_name = type1->font_name;
        }
  
        if ( !root->style_name )
        {
          if ( info->weight )
            root->style_name = info->weight;
          else
            /* assume `Regular' style because we don't know better */
            root->style_name = (char *)"Regular";
        }
  
        /* compute style flags */
        root->style_flags = 0;
        if ( info->italic_angle )
          root->style_flags |= FT_STYLE_FLAG_ITALIC;
        if ( info->weight )
        {
          if ( !ft_strcmp( info->weight, "Bold"  ) ||
               !ft_strcmp( info->weight, "Black" ) )
            root->style_flags |= FT_STYLE_FLAG_BOLD;
        }
  
        /* no embedded bitmap support */
        root->num_fixed_sizes = 0;
        root->available_sizes = NULL;
  
        root->bbox.xMin =   type1->font_bbox.xMin            >> 16;
        root->bbox.yMin =   type1->font_bbox.yMin            >> 16;
        /* no `U' suffix here to 0xFFFF! */
        root->bbox.xMax = ( type1->font_bbox.xMax + 0xFFFF ) >> 16;
        root->bbox.yMax = ( type1->font_bbox.yMax + 0xFFFF ) >> 16;
  
        /* Set units_per_EM if we didn't set it in t1_parse_font_matrix. */
        if ( !root->units_per_EM )
          root->units_per_EM = 1000;
  
        root->ascender  = (FT_Short)( root->bbox.yMax );
        root->descender = (FT_Short)( root->bbox.yMin );
  
        root->height = (FT_Short)( ( root->units_per_EM * 12 ) / 10 );
        if ( root->height < root->ascender - root->descender )
          root->height = (FT_Short)( root->ascender - root->descender );
  
        /* now compute the maximum advance width */
        root->max_advance_width =
          (FT_Short)( root->bbox.xMax );
        {
          FT_Pos  max_advance;
  
  
          error = T1_Compute_Max_Advance( face, &max_advance );
  
          /* in case of error, keep the standard width */
          if ( !error )
            root->max_advance_width = (FT_Short)FIXED_TO_INT( max_advance );
          else
            error = FT_Err_Ok;   /* clear error */
        }
  
        root->max_advance_height = root->height;
  
        root->underline_position  = (FT_Short)info->underline_position;
        root->underline_thickness = (FT_Short)info->underline_thickness;
      }
  
      {
        FT_Face  root = &face->root;
  
  
        if ( psnames )
        {
          FT_CharMapRec    charmap;
          T1_CMap_Classes  cmap_classes = psaux->t1_cmap_classes;
          FT_CMap_Class    clazz;
  
  
          charmap.face = root;
  
          /* first of all, try to synthesize a Unicode charmap */
          charmap.platform_id = TT_PLATFORM_MICROSOFT;
          charmap.encoding_id = TT_MS_ID_UNICODE_CS;
          charmap.encoding    = FT_ENCODING_UNICODE;
  
          error = FT_CMap_New( cmap_classes->unicode, NULL, &charmap, NULL );
          if ( error                                      &&
               FT_ERR_NEQ( error, No_Unicode_Glyph_Name ) &&
               FT_ERR_NEQ( error, Unimplemented_Feature ) )
            goto Exit;
          error = FT_Err_Ok;
  
          /* now, generate an Adobe Standard encoding when appropriate */
          charmap.platform_id = TT_PLATFORM_ADOBE;
          clazz               = NULL;
  
          switch ( type1->encoding_type )
          {
          case T1_ENCODING_TYPE_STANDARD:
            charmap.encoding    = FT_ENCODING_ADOBE_STANDARD;
            charmap.encoding_id = TT_ADOBE_ID_STANDARD;
            clazz               = cmap_classes->standard;
            break;
  
          case T1_ENCODING_TYPE_EXPERT:
            charmap.encoding    = FT_ENCODING_ADOBE_EXPERT;
            charmap.encoding_id = TT_ADOBE_ID_EXPERT;
            clazz               = cmap_classes->expert;
            break;
  
          case T1_ENCODING_TYPE_ARRAY:
            charmap.encoding    = FT_ENCODING_ADOBE_CUSTOM;
            charmap.encoding_id = TT_ADOBE_ID_CUSTOM;
            clazz               = cmap_classes->custom;
            break;
  
          case T1_ENCODING_TYPE_ISOLATIN1:
            charmap.encoding    = FT_ENCODING_ADOBE_LATIN_1;
            charmap.encoding_id = TT_ADOBE_ID_LATIN_1;
            clazz               = cmap_classes->unicode;
            break;
  
          default:
            ;
          }
  
          if ( clazz )
            error = FT_CMap_New( clazz, NULL, &charmap, NULL );
        }
      }
  
    Exit:
      return error;
    }
  
  
    /**************************************************************************
     *
     * @Function:
     *   T1_Driver_Init
     *
     * @Description:
     *   Initializes a given Type 1 driver object.
     *
     * @Input:
     *   driver ::
     *     A handle to the target driver object.
     *
     * @Return:
     *   FreeType error code.  0 means success.
     */
    FT_LOCAL_DEF( FT_Error )
    T1_Driver_Init( FT_Module  module )
    {
      PS_Driver  driver = (PS_Driver)module;
  
      FT_UInt32  seed;
  
  
      /* set default property values, cf. `ftt1drv.h' */
  #ifdef T1_CONFIG_OPTION_OLD_ENGINE
      driver->hinting_engine = FT_HINTING_FREETYPE;
  #else
      driver->hinting_engine = FT_HINTING_ADOBE;
  #endif
  
      driver->no_stem_darkening = TRUE;
  
      driver->darken_params[0] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_X1;
      driver->darken_params[1] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y1;
      driver->darken_params[2] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2;
      driver->darken_params[3] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y2;
      driver->darken_params[4] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3;
      driver->darken_params[5] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y3;
      driver->darken_params[6] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_X4;
      driver->darken_params[7] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y4;
  
      /* compute random seed from some memory addresses */
      seed = (FT_UInt32)( (FT_Offset)(char*)&seed          ^
                          (FT_Offset)(char*)&module        ^
                          (FT_Offset)(char*)module->memory );
      seed = seed ^ ( seed >> 10 ) ^ ( seed >> 20 );
  
      driver->random_seed = (FT_Int32)seed;
      if ( driver->random_seed < 0 )
        driver->random_seed = -driver->random_seed;
      else if ( driver->random_seed == 0 )
        driver->random_seed = 123456789;
  
      return FT_Err_Ok;
    }
  
  
    /**************************************************************************
     *
     * @Function:
     *   T1_Driver_Done
     *
     * @Description:
     *   Finalizes a given Type 1 driver.
     *
     * @Input:
     *   driver ::
     *     A handle to the target Type 1 driver.
     */
    FT_LOCAL_DEF( void )
    T1_Driver_Done( FT_Module  driver )
    {
      FT_UNUSED( driver );
    }
  
  
  /* END */
  

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