kc3-lang/freetype/src/cid/cidobjs.c

Branch : - branch - master v2.13 - tag -

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• Author : Alexei Podtelezhnikov
  Date : 2023-03-03 17:21:10
  Hash : 5ac6276a
  Message : [cff,cid,type1] Shorten de-referencing. * src/cff/cffobjs.c (cff_clot_init): Use immediate library reference. * src/cid/cidobjs.c (cid_slot_init): Ditto. * src/type1/t1objs.c (T1_GlyphSlot_Init): Ditto.

• src/cid/cidobjs.c

• /****************************************************************************
   *
   * cidobjs.c
   *
   *   CID objects manager (body).
   *
   * Copyright (C) 1996-2023 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>
  
  #include "cidgload.h"
  #include "cidload.h"
  
  #include <freetype/internal/services/svpscmap.h>
  #include <freetype/internal/psaux.h>
  #include <freetype/internal/pshints.h>
  #include <freetype/ftdriver.h>
  
  #include "ciderrs.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  cidobjs
  
  
    /**************************************************************************
     *
     *                           SLOT  FUNCTIONS
     *
     */
  
    FT_LOCAL_DEF( void )
    cid_slot_done( FT_GlyphSlot  slot )
    {
      if ( slot->internal )
        slot->internal->glyph_hints = NULL;
    }
  
  
    FT_LOCAL_DEF( FT_Error )
    cid_slot_init( FT_GlyphSlot  slot )
    {
      CID_Face          face;
      PSHinter_Service  pshinter;
  
  
      face     = (CID_Face)slot->face;
      pshinter = (PSHinter_Service)face->pshinter;
  
      if ( pshinter )
      {
        FT_Module  module;
  
  
        module = FT_Get_Module( slot->library, "pshinter" );
        if ( module )
        {
          T1_Hints_Funcs  funcs;
  
  
          funcs = pshinter->get_t1_funcs( module );
          slot->internal->glyph_hints = (void*)funcs;
        }
      }
  
      return 0;
    }
  
  
    /**************************************************************************
     *
     *                          SIZE  FUNCTIONS
     *
     */
  
  
    static PSH_Globals_Funcs
    cid_size_get_globals_funcs( CID_Size  size )
    {
      CID_Face          face     = (CID_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 )
    cid_size_done( FT_Size  cidsize )         /* CID_Size */
    {
      CID_Size  size = (CID_Size)cidsize;
  
  
      if ( cidsize->internal->module_data )
      {
        PSH_Globals_Funcs  funcs;
  
  
        funcs = cid_size_get_globals_funcs( size );
        if ( funcs )
          funcs->destroy( (PSH_Globals)cidsize->internal->module_data );
  
        cidsize->internal->module_data = NULL;
      }
    }
  
  
    FT_LOCAL_DEF( FT_Error )
    cid_size_init( FT_Size  cidsize )     /* CID_Size */
    {
      CID_Size           size  = (CID_Size)cidsize;
      FT_Error           error = FT_Err_Ok;
      PSH_Globals_Funcs  funcs = cid_size_get_globals_funcs( size );
  
  
      if ( funcs )
      {
        PSH_Globals   globals;
        CID_Face      face = (CID_Face)cidsize->face;
        CID_FaceDict  dict = face->cid.font_dicts + face->root.face_index;
        PS_Private    priv = &dict->private_dict;
  
  
        error = funcs->create( cidsize->face->memory, priv, &globals );
        if ( !error )
          cidsize->internal->module_data = globals;
      }
  
      return error;
    }
  
  
    FT_LOCAL_DEF( FT_Error )
    cid_size_request( FT_Size          size,
                      FT_Size_Request  req )
    {
      FT_Error  error;
  
      PSH_Globals_Funcs  funcs;
  
  
      error = FT_Request_Metrics( size->face, req );
      if ( error )
        goto Exit;
  
      funcs = cid_size_get_globals_funcs( (CID_Size)size );
  
      if ( funcs )
        funcs->set_scale( (PSH_Globals)size->internal->module_data,
                          size->metrics.x_scale,
                          size->metrics.y_scale,
                          0, 0 );
  
    Exit:
      return error;
    }
  
  
    /**************************************************************************
     *
     *                          FACE  FUNCTIONS
     *
     */
  
    /**************************************************************************
     *
     * @Function:
     *   cid_face_done
     *
     * @Description:
     *   Finalizes a given face object.
     *
     * @Input:
     *   face ::
     *     A pointer to the face object to destroy.
     */
    FT_LOCAL_DEF( void )
    cid_face_done( FT_Face  cidface )         /* CID_Face */
    {
      CID_Face      face = (CID_Face)cidface;
      FT_Memory     memory;
      CID_FaceInfo  cid;
      PS_FontInfo   info;
  
  
      if ( !face )
        return;
  
      cid    = &face->cid;
      info   = &cid->font_info;
      memory = cidface->memory;
  
      /* release subrs */
      if ( face->subrs )
      {
        FT_UInt  n;
  
  
        for ( n = 0; n < cid->num_dicts; n++ )
        {
          CID_Subrs  subr = face->subrs + n;
  
  
          if ( subr->code )
          {
            FT_FREE( subr->code[0] );
            FT_FREE( subr->code );
          }
        }
  
        FT_FREE( face->subrs );
      }
  
      /* release FontInfo strings */
      FT_FREE( info->version );
      FT_FREE( info->notice );
      FT_FREE( info->full_name );
      FT_FREE( info->family_name );
      FT_FREE( info->weight );
  
      /* release font dictionaries */
      FT_FREE( cid->font_dicts );
      cid->num_dicts = 0;
  
      /* release other strings */
      FT_FREE( cid->cid_font_name );
      FT_FREE( cid->registry );
      FT_FREE( cid->ordering );
  
      cidface->family_name = NULL;
      cidface->style_name  = NULL;
  
      FT_FREE( face->binary_data );
      FT_FREE( face->cid_stream );
    }
  
  
    /**************************************************************************
     *
     * @Function:
     *   cid_face_init
     *
     * @Description:
     *   Initializes a given CID face object.
     *
     * @Input:
     *   stream ::
     *     The source font stream.
     *
     *   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 newly built face object.
     *
     * @Return:
     *   FreeType error code.  0 means success.
     */
    FT_LOCAL_DEF( FT_Error )
    cid_face_init( FT_Stream      stream,
                   FT_Face        cidface,        /* CID_Face */
                   FT_Int         face_index,
                   FT_Int         num_params,
                   FT_Parameter*  params )
    {
      CID_Face          face = (CID_Face)cidface;
      FT_Error          error;
      PSAux_Service     psaux;
      PSHinter_Service  pshinter;
  
      FT_UNUSED( num_params );
      FT_UNUSED( params );
      FT_UNUSED( stream );
  
  
      cidface->num_faces = 1;
  
      psaux = (PSAux_Service)face->psaux;
      if ( !psaux )
      {
        psaux = (PSAux_Service)FT_Get_Module_Interface(
                  FT_FACE_LIBRARY( face ), "psaux" );
  
        if ( !psaux )
        {
          FT_ERROR(( "cid_face_init: cannot access `psaux' module\n" ));
          error = FT_THROW( Missing_Module );
          goto Exit;
        }
  
        face->psaux = psaux;
      }
  
      pshinter = (PSHinter_Service)face->pshinter;
      if ( !pshinter )
      {
        pshinter = (PSHinter_Service)FT_Get_Module_Interface(
                     FT_FACE_LIBRARY( face ), "pshinter" );
  
        face->pshinter = pshinter;
      }
  
      FT_TRACE2(( "CID driver\n" ));
  
      /* open the tokenizer; this will also check the font format */
      if ( FT_STREAM_SEEK( 0 ) )
        goto Exit;
  
      error = cid_face_open( face, face_index );
      if ( error )
        goto Exit;
  
      /* if we just wanted to check the format, leave successfully now */
      if ( face_index < 0 )
        goto Exit;
  
      /* check the face index */
      /* XXX: handle CID fonts with more than a single face */
      if ( ( face_index & 0xFFFF ) != 0 )
      {
        FT_ERROR(( "cid_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 */
      {
        CID_FaceInfo  cid  = &face->cid;
        PS_FontInfo   info = &cid->font_info;
  
  
        cidface->num_glyphs   = (FT_Long)cid->cid_count;
        cidface->num_charmaps = 0;
  
        cidface->face_index = face_index & 0xFFFF;
  
        cidface->face_flags |= FT_FACE_FLAG_SCALABLE   | /* scalable outlines */
                               FT_FACE_FLAG_HORIZONTAL | /* horizontal data   */
                               FT_FACE_FLAG_HINTER;      /* has native hinter */
  
        if ( info->is_fixed_pitch )
          cidface->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!                   */
        cidface->family_name = info->family_name;
        /* assume "Regular" style if we don't know better */
        cidface->style_name = (char *)"Regular";
        if ( cidface->family_name )
        {
          char*  full   = info->full_name;
          char*  family = cidface->family_name;
  
  
          if ( full )
          {
            while ( *full )
            {
              if ( *full == *family )
              {
                family++;
                full++;
              }
              else
              {
                if ( *full == ' ' || *full == '-' )
                  full++;
                else if ( *family == ' ' || *family == '-' )
                  family++;
                else
                {
                  if ( !*family )
                    cidface->style_name = full;
                  break;
                }
              }
            }
          }
        }
        else
        {
          /* do we have a `/FontName'? */
          if ( cid->cid_font_name )
            cidface->family_name = cid->cid_font_name;
        }
  
        /* compute style flags */
        cidface->style_flags = 0;
        if ( info->italic_angle )
          cidface->style_flags |= FT_STYLE_FLAG_ITALIC;
        if ( info->weight )
        {
          if ( !ft_strcmp( info->weight, "Bold"  ) ||
               !ft_strcmp( info->weight, "Black" ) )
            cidface->style_flags |= FT_STYLE_FLAG_BOLD;
        }
  
        /* no embedded bitmap support */
        cidface->num_fixed_sizes = 0;
        cidface->available_sizes = NULL;
  
        cidface->bbox.xMin =   cid->font_bbox.xMin            >> 16;
        cidface->bbox.yMin =   cid->font_bbox.yMin            >> 16;
        /* no `U' suffix here to 0xFFFF! */
        cidface->bbox.xMax = ( cid->font_bbox.xMax + 0xFFFF ) >> 16;
        cidface->bbox.yMax = ( cid->font_bbox.yMax + 0xFFFF ) >> 16;
  
        if ( !cidface->units_per_EM )
          cidface->units_per_EM = 1000;
  
        cidface->ascender  = (FT_Short)( cidface->bbox.yMax );
        cidface->descender = (FT_Short)( cidface->bbox.yMin );
  
        cidface->height = (FT_Short)( ( cidface->units_per_EM * 12 ) / 10 );
        if ( cidface->height < cidface->ascender - cidface->descender )
          cidface->height = (FT_Short)( cidface->ascender - cidface->descender );
  
        cidface->underline_position  = (FT_Short)info->underline_position;
        cidface->underline_thickness = (FT_Short)info->underline_thickness;
      }
  
    Exit:
      return error;
    }
  
  
    /**************************************************************************
     *
     * @Function:
     *   cid_driver_init
     *
     * @Description:
     *   Initializes a given CID driver object.
     *
     * @Input:
     *   driver ::
     *     A handle to the target driver object.
     *
     * @Return:
     *   FreeType error code.  0 means success.
     */
    FT_LOCAL_DEF( FT_Error )
    cid_driver_init( FT_Module  module )
    {
      PS_Driver  driver = (PS_Driver)module;
  
      FT_UInt32  seed;
  
  
      /* set default property values, cf. `ftt1drv.h' */
      driver->hinting_engine = FT_HINTING_ADOBE;
  
      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:
     *   cid_driver_done
     *
     * @Description:
     *   Finalizes a given CID driver.
     *
     * @Input:
     *   driver ::
     *     A handle to the target CID driver.
     */
    FT_LOCAL_DEF( void )
    cid_driver_done( FT_Module  driver )
    {
      FT_UNUSED( driver );
    }
  
  
  /* END */