Esempio n. 1
0
  FT_Get_Advance( FT_Face    face,
                  FT_UInt    gindex,
                  FT_Int32   flags,
                  FT_Fixed  *padvance )
  {
    FT_Face_GetAdvancesFunc  func;


    if ( !face )
      return FT_THROW( Invalid_Face_Handle );

    if ( !padvance )
      return FT_THROW( Invalid_Argument );

    if ( gindex >= (FT_UInt)face->num_glyphs )
      return FT_THROW( Invalid_Glyph_Index );

    func = face->driver->clazz->get_advances;
    if ( func && LOAD_ADVANCE_FAST_CHECK( flags ) )
    {
      FT_Error  error;


      error = func( face, gindex, 1, flags, padvance );
      if ( !error )
        return _ft_face_scale_advances( face, padvance, 1, flags );

      if ( FT_ERR_NEQ( error, Unimplemented_Feature ) )
        return error;
    }

    return FT_Get_Advances( face, gindex, 1, flags, padvance );
  }
Esempio n. 2
0
  FT_Get_Advances( FT_Face    face,
                   FT_UInt    start,
                   FT_UInt    count,
                   FT_Int32   flags,
                   FT_Fixed  *padvances )
  {
    FT_Face_GetAdvancesFunc  func;
    FT_UInt                  num, end, nn;
    FT_Error                 error = FT_Err_Ok;


    if ( !face )
      return FT_THROW( Invalid_Face_Handle );

    if ( !padvances )
      return FT_THROW( Invalid_Argument );

    num = (FT_UInt)face->num_glyphs;
    end = start + count;
    if ( start >= num || end < start || end > num )
      return FT_THROW( Invalid_Glyph_Index );

    if ( count == 0 )
      return FT_Err_Ok;

    func = face->driver->clazz->get_advances;
    if ( func && LOAD_ADVANCE_FAST_CHECK( flags ) )
    {
      error = func( face, start, count, flags, padvances );
      if ( !error )
        return _ft_face_scale_advances( face, padvances, count, flags );

      if ( FT_ERR_NEQ( error, Unimplemented_Feature ) )
        return error;
    }

    error = FT_Err_Ok;

    if ( flags & FT_ADVANCE_FLAG_FAST_ONLY )
      return FT_THROW( Unimplemented_Feature );

    flags |= (FT_UInt32)FT_LOAD_ADVANCE_ONLY;
    for ( nn = 0; nn < count; nn++ )
    {
      error = FT_Load_Glyph( face, start + nn, flags );
      if ( error )
        break;

      /* scale from 26.6 to 16.16 */
      padvances[nn] = ( flags & FT_LOAD_VERTICAL_LAYOUT )
                      ? face->glyph->advance.y << 10
                      : face->glyph->advance.x << 10;
    }

    return error;
  }
Esempio n. 3
0
  FT_Get_Advances( FT_Face    face,
                   FT_UInt    start,
                   FT_UInt    count,
                   FT_Int32   flags,
                   FT_Fixed  *padvances )
  {
    FT_Face_GetAdvancesFunc  func;
    FT_UInt                  num, end, nn;
    FT_Error                 error = FT_Err_Ok;


    if ( !face )
      return FT_Err_Invalid_Face_Handle;

    num = (FT_UInt)face->num_glyphs;
    end = start + count;
    if ( start >= num || end < start || end > num )
      return FT_Err_Invalid_Glyph_Index;

    if ( count == 0 )
      return FT_Err_Ok;

    func = face->driver->clazz->get_advances;
    if ( func && LOAD_ADVANCE_FAST_CHECK( flags ) )
    {
      error = func( face, start, count, flags, padvances );
      if ( !error )
        goto Exit;

      if ( error != FT_ERROR_BASE( FT_Err_Unimplemented_Feature ) )
        return error;
    }

    error = FT_Err_Ok;

    if ( flags & FT_ADVANCE_FLAG_FAST_ONLY )
      return FT_Err_Unimplemented_Feature;

    flags |= FT_LOAD_ADVANCE_ONLY;
    for ( nn = 0; nn < count; nn++ )
    {
      error = FT_Load_Glyph( face, start + nn, flags );
      if ( error )
        break;

      padvances[nn] = ( flags & FT_LOAD_VERTICAL_LAYOUT )
                      ? face->glyph->advance.x
                      : face->glyph->advance.y;
    }

    if ( error )
      return error;

  Exit:
    return _ft_face_scale_advances( face, padvances, count, flags );
  }