C++ FT_MEM_ZERO函数代码示例

tt_glyphzone_new( FT_Memory     memory,
                  FT_UShort     maxPoints,
                  FT_Short      maxContours,
                  TT_GlyphZone  zone )
{
    FT_Error  error;


    FT_MEM_ZERO( zone, sizeof ( *zone ) );
    zone->memory = memory;

    if ( FT_NEW_ARRAY( zone->org,      maxPoints   ) ||
            FT_NEW_ARRAY( zone->cur,      maxPoints   ) ||
            FT_NEW_ARRAY( zone->orus,     maxPoints   ) ||
            FT_NEW_ARRAY( zone->tags,     maxPoints   ) ||
            FT_NEW_ARRAY( zone->contours, maxContours ) )
    {
        tt_glyphzone_done( zone );
    }
    else
    {
        zone->max_points   = maxPoints;
        zone->max_contours = maxContours;
    }

    return error;
}

  FT_Alloc( FT_Memory  memory,
            FT_Long    size,
            void*     *P )
  {
    FT_ASSERT( P != 0 );

    if ( size > 0 )
    {
      *P = memory->alloc( memory, size );
      if ( !*P )
      {
        FT_ERROR(( "FT_Alloc:" ));
        FT_ERROR(( " Out of memory? (%ld requested)\n",
                   size ));

        return FT_Err_Out_Of_Memory;
      }
      FT_MEM_ZERO( *P, size );
    }
    else
      *P = NULL;

    FT_TRACE7(( "FT_Alloc:" ));
    FT_TRACE7(( " size = %ld, block = 0x%08p, ref = 0x%08p\n",
                size, *P, P ));

    return FT_Err_Ok;
  }

/* return the glyph's control box */
static void
ft_raster1_get_cbox( FT_Renderer   render,
                     FT_GlyphSlot  slot,
                     FT_BBox*      cbox )
{
    FT_MEM_ZERO( cbox, sizeof ( *cbox ) );

    if ( slot->format == render->glyph_format )
        FT_Outline_Get_CBox( &slot->outline, cbox );
}

  ft_mem_alloc( FT_Memory  memory,
                FT_Long    size,
                FT_Error  *p_error )
  {
    FT_Error    error;
    FT_Pointer  block = ft_mem_qalloc( memory, size, &error );

    if ( !error && size > 0 )
      FT_MEM_ZERO( block, size );

    *p_error = error;
    return block;
  }

  t42_loader_init( T42_Loader  loader,
                   T42_Face    face )
  {
    FT_UNUSED( face );

    FT_MEM_ZERO( loader, sizeof ( *loader ) );
    loader->num_glyphs = 0;
    loader->num_chars  = 0;

    /* initialize the tables -- simply set their `init' field to 0 */
    loader->encoding_table.init = 0;
    loader->charstrings.init    = 0;
    loader->glyph_names.init    = 0;
  }

  static void
  cf2_outline_init( CF2_Outline  outline,
                    FT_Memory    memory,
                    FT_Error*    error )
  {
    FT_MEM_ZERO( outline, sizeof ( CF2_OutlineRec ) );

    outline->root.memory = memory;
    outline->root.error  = error;

    outline->root.moveTo = cf2_builder_moveTo;
    outline->root.lineTo = cf2_builder_lineTo;
    outline->root.cubeTo = cf2_builder_cubeTo;
  }

static FT_MemTable
ft_mem_table_new( FT_Memory  memory )
{
    FT_MemTable  table;


    table = (FT_MemTable)memory->alloc( memory, sizeof ( *table ) );
    if ( table == NULL )
        goto Exit;

    FT_MEM_ZERO( table, sizeof ( *table ) );

    table->size  = FT_MEM_SIZE_MIN;
    table->nodes = 0;

    table->memory = memory;

    table->memory_user = memory->user;

    table->alloc   = memory->alloc;
    table->realloc = memory->realloc;
    table->free    = memory->free;

    table->buckets = (FT_MemNode *)
                     memory->alloc( memory,
                                    table->size * sizeof ( FT_MemNode ) );
    if ( table->buckets )
        FT_MEM_ZERO( table->buckets, sizeof ( FT_MemNode ) * table->size );
    else
    {
        memory->free( memory, table );
        table = NULL;
    }

Exit:
    return table;
}

static void
ft_mem_table_resize( FT_MemTable  table )
{
    FT_ULong  new_size;


    new_size = ft_mem_closest_prime( table->nodes );
    if ( new_size != table->size )
    {
        FT_MemNode*  new_buckets ;
        FT_ULong     i;


        new_buckets = (FT_MemNode *)
                      ft_mem_table_alloc( table,
                                          new_size * sizeof ( FT_MemNode ) );
        if ( new_buckets == NULL )
            return;

        FT_MEM_ZERO( new_buckets, sizeof ( FT_MemNode ) * new_size );

        for ( i = 0; i < table->size; i++ )
        {
            FT_MemNode  node, next, *pnode;
            FT_ULong    hash;


            node = table->buckets[i];
            while ( node )
            {
                next  = node->link;
                hash  = FT_MEM_VAL( node->address ) % new_size;
                pnode = new_buckets + hash;

                node->link = pnode[0];
                pnode[0]   = node;

                node = next;
            }
        }

        if ( table->buckets )
            ft_mem_table_free( table, table->buckets );

        table->buckets = new_buckets;
        table->size    = new_size;
    }
}

  static void
  cff_index_done( CFF_Index  idx )
  {
    if ( idx->stream )
    {
      FT_Stream  stream = idx->stream;
      FT_Memory  memory = stream->memory;


      if ( idx->bytes )
        FT_FRAME_RELEASE( idx->bytes );

      FT_FREE( idx->offsets );
      FT_MEM_ZERO( idx, sizeof ( *idx ) );
    }
  }

  static void
  cff_make_private_dict( CFF_SubFont  subfont,
                         PS_Private   priv )
  {
    CFF_Private  cpriv = &subfont->private_dict;
    FT_UInt      n, count;


    FT_MEM_ZERO( priv, sizeof ( *priv ) );

    count = priv->num_blue_values = cpriv->num_blue_values;
    for ( n = 0; n < count; n++ )
      priv->blue_values[n] = (FT_Short)cpriv->blue_values[n];

    count = priv->num_other_blues = cpriv->num_other_blues;
    for ( n = 0; n < count; n++ )
      priv->other_blues[n] = (FT_Short)cpriv->other_blues[n];

    count = priv->num_family_blues = cpriv->num_family_blues;
    for ( n = 0; n < count; n++ )
      priv->family_blues[n] = (FT_Short)cpriv->family_blues[n];

    count = priv->num_family_other_blues = cpriv->num_family_other_blues;
    for ( n = 0; n < count; n++ )
      priv->family_other_blues[n] = (FT_Short)cpriv->family_other_blues[n];

    priv->blue_scale = cpriv->blue_scale;
    priv->blue_shift = (FT_Int)cpriv->blue_shift;
    priv->blue_fuzz  = (FT_Int)cpriv->blue_fuzz;

    priv->standard_width[0]  = (FT_UShort)cpriv->standard_width;
    priv->standard_height[0] = (FT_UShort)cpriv->standard_height;

    count = priv->num_snap_widths = cpriv->num_snap_widths;
    for ( n = 0; n < count; n++ )
      priv->snap_widths[n] = (FT_Short)cpriv->snap_widths[n];

    count = priv->num_snap_heights = cpriv->num_snap_heights;
    for ( n = 0; n < count; n++ )
      priv->snap_heights[n] = (FT_Short)cpriv->snap_heights[n];

    priv->force_bold     = cpriv->force_bold;
    priv->language_group = cpriv->language_group;
    priv->lenIV          = cpriv->lenIV;
  }

  ft_mem_realloc( FT_Memory  memory,
                  FT_Long    item_size,
                  FT_Long    cur_count,
                  FT_Long    new_count,
                  void*      block,
                  FT_Error  *p_error )
  {
    FT_Error  error = FT_Err_Ok;

    block = ft_mem_qrealloc( memory, item_size,
                             cur_count, new_count, block, &error );
    if ( !error && new_count > cur_count )
      FT_MEM_ZERO( (char*)block + cur_count * item_size,
                   ( new_count - cur_count ) * item_size );

    *p_error = error;
    return block;
  }

  ft_mem_realloc( FT_Memory  memory,
                  FT_Long    item_size,
                  FT_Long    cur_count,
                  FT_Long    new_count,
                  void*      block,
                  FT_Error  *p_error )
  {
    FT_Error  error = FT_Err_Ok;

    block = ft_mem_qrealloc( memory, item_size,
                             cur_count, new_count, block, &error );
    //if ( !error && new_count > cur_count )
    if ( !error && (FT_ULong)new_count > (FT_ULong)cur_count ) /* cast to ulong because otherwise the compiler may warn that it's assuming signed integers can't overflow. */
      FT_MEM_ZERO( (char*)block + cur_count * item_size,
                   ( new_count - cur_count ) * item_size );

    *p_error = error;
    return block;
  }

  t1_decoder_init( T1_Decoder           decoder,
                   FT_Face              face,
                   FT_Size              size,
                   FT_GlyphSlot         slot,
                   FT_Byte**            glyph_names,
                   PS_Blend             blend,
                   FT_Bool              hinting,
                   FT_Render_Mode       hint_mode,
                   T1_Decoder_Callback  parse_callback )
  {
    FT_MEM_ZERO( decoder, sizeof ( *decoder ) );

    /* retrieve PSNames interface from list of current modules */
    {
      FT_Service_PsCMaps  psnames = 0;


      FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );
      if ( !psnames )
      {
        FT_ERROR(( "t1_decoder_init: " ));
        FT_ERROR(( "the `psnames' module is not available\n" ));
        return PSaux_Err_Unimplemented_Feature;
      }

      decoder->psnames = psnames;
    }

    t1_builder_init( &decoder->builder, face, size, slot, hinting );

    decoder->num_glyphs     = (FT_UInt)face->num_glyphs;
    decoder->glyph_names    = glyph_names;
    decoder->hint_mode      = hint_mode;
    decoder->blend          = blend;
    decoder->parse_callback = parse_callback;

    decoder->funcs          = t1_decoder_funcs;

    return 0;
  }

  FT_Realloc( FT_Memory  memory,
              FT_Long    current,
              FT_Long    size,
              void**     P )
  {
    void*  Q;


    FT_ASSERT( P != 0 );

    /* if the original pointer is NULL, call FT_Alloc() */
    if ( !*P )
      return FT_Alloc( memory, size, P );

    /* if the new block if zero-sized, clear the current one */
    if ( size <= 0 )
    {
      FT_Free( memory, P );
      return FT_Err_Ok;
    }

    Q = memory->realloc( memory, current, size, *P );
    if ( !Q )
      goto Fail;

    if ( size > current )
      FT_MEM_ZERO( (char*)Q + current, size - current );

    *P = Q;
    return FT_Err_Ok;

  Fail:
    FT_ERROR(( "FT_Realloc:" ));
    FT_ERROR(( " Failed (current %ld, requested %ld)\n",
               current, size ));
    return FT_Err_Out_Of_Memory;
  }

  static FT_Error
  ft_bitmap_assure_buffer( FT_Memory   memory,
                           FT_Bitmap*  bitmap,
                           FT_UInt     xpixels,
                           FT_UInt     ypixels )
  {
    FT_Error        error;
    int             pitch;
    int             new_pitch;
    FT_UInt         bpp;
    FT_Int          i, width, height;
    unsigned char*  buffer = NULL;


    width  = bitmap->width;
    height = bitmap->rows;
    pitch  = bitmap->pitch;
    if ( pitch < 0 )
      pitch = -pitch;

    switch ( bitmap->pixel_mode )
    {
    case FT_PIXEL_MODE_MONO:
      bpp       = 1;
      new_pitch = ( width + xpixels + 7 ) >> 3;
      break;
    case FT_PIXEL_MODE_GRAY2:
      bpp       = 2;
      new_pitch = ( width + xpixels + 3 ) >> 2;
      break;
    case FT_PIXEL_MODE_GRAY4:
      bpp       = 4;
      new_pitch = ( width + xpixels + 1 ) >> 1;
      break;
    case FT_PIXEL_MODE_GRAY:
    case FT_PIXEL_MODE_LCD:
    case FT_PIXEL_MODE_LCD_V:
      bpp       = 8;
      new_pitch = ( width + xpixels );
      break;
    default:
      return FT_THROW( Invalid_Glyph_Format );
    }

    /* if no need to allocate memory */
    if ( ypixels == 0 && new_pitch <= pitch )
    {
      /* zero the padding */
      FT_Int  bit_width = pitch * 8;
      FT_Int  bit_last  = ( width + xpixels ) * bpp;


      if ( bit_last < bit_width )
      {
        FT_Byte*  line  = bitmap->buffer + ( bit_last >> 3 );
        FT_Byte*  end   = bitmap->buffer + pitch;
        FT_Int    shift = bit_last & 7;
        FT_UInt   mask  = 0xFF00U >> shift;
        FT_Int    count = height;


        for ( ; count > 0; count--, line += pitch, end += pitch )
        {
          FT_Byte*  write = line;


          if ( shift > 0 )
          {
            write[0] = (FT_Byte)( write[0] & mask );
            write++;
          }
          if ( write < end )
            FT_MEM_ZERO( write, end-write );
        }
      }