示例#1
0
  /* Create a new memory stream from a buffer and a size. */
  static FT_Error
  new_memory_stream( FT_Library           library,
                     FT_Byte*             base,
                     FT_ULong             size,
                     FT_Stream_CloseFunc  close,
                     FT_Stream*           astream )
  {
    FT_Error   error;
    FT_Memory  memory;
    FT_Stream  stream;


    if ( !library )
      return FT_Err_Invalid_Library_Handle;

    if ( !base )
      return FT_Err_Invalid_Argument;

    *astream = 0;
    memory = library->memory;
    if ( FT_NEW( stream ) )
      goto Exit;

    FT_Stream_OpenMemory( stream, base, size );

    stream->close = close;

    *astream = stream;

  Exit:
    return error;
  }
示例#2
0
FT_New_Memory_Stream(FT_Library library,
                     FT_Byte * base,
                     FT_ULong size,
                     FT_Stream stream)
{
    FT_UNUSED(library);

    FT_Stream_OpenMemory(stream, base, size);
}
示例#3
0
文件: pngshim.c 项目: ONLYOFFICE/core
  Load_SBit_Png( FT_GlyphSlot     slot,
                 FT_Int           x_offset,
                 FT_Int           y_offset,
                 FT_Int           pix_bits,
                 TT_SBit_Metrics  metrics,
                 FT_Memory        memory,
                 FT_Byte*         data,
                 FT_UInt          png_len,
                 FT_Bool          populate_map_and_metrics )
  {
    FT_Bitmap    *map   = &slot->bitmap;
    FT_Error      error = FT_Err_Ok;
    FT_StreamRec  stream;

    png_structp  png;
    png_infop    info;
    png_uint_32  imgWidth, imgHeight;

    int         bitdepth, color_type, interlace;
    FT_Int      i;
    png_byte*  *rows = NULL; /* pacify compiler */


    if ( x_offset < 0 ||
         y_offset < 0 )
    {
      error = FT_THROW( Invalid_Argument );
      goto Exit;
    }

    if ( !populate_map_and_metrics                   &&
         ( x_offset + metrics->width  > map->width ||
           y_offset + metrics->height > map->rows  ||
           pix_bits != 32                          ||
           map->pixel_mode != FT_PIXEL_MODE_BGRA   ) )
    {
      error = FT_THROW( Invalid_Argument );
      goto Exit;
    }

    FT_Stream_OpenMemory( &stream, data, png_len );

    png = png_create_read_struct( PNG_LIBPNG_VER_STRING,
                                  &error,
                                  error_callback,
                                  warning_callback );
    if ( !png )
    {
      error = FT_THROW( Out_Of_Memory );
      goto Exit;
    }

    info = png_create_info_struct( png );
    if ( !info )
    {
      error = FT_THROW( Out_Of_Memory );
      png_destroy_read_struct( &png, NULL, NULL );
      goto Exit;
    }

    if ( ft_setjmp( png_jmpbuf( png ) ) )
    {
      error = FT_THROW( Invalid_File_Format );
      goto DestroyExit;
    }

    png_set_read_fn( png, &stream, read_data_from_FT_Stream );

    png_read_info( png, info );
    png_get_IHDR( png, info,
                  &imgWidth, &imgHeight,
                  &bitdepth, &color_type, &interlace,
                  NULL, NULL );

    if ( error                                        ||
         ( !populate_map_and_metrics                &&
           ( (FT_Int)imgWidth  != metrics->width  ||
             (FT_Int)imgHeight != metrics->height ) ) )
      goto DestroyExit;

    if ( populate_map_and_metrics )
    {
      FT_Long  size;


      metrics->width  = (FT_Int)imgWidth;
      metrics->height = (FT_Int)imgHeight;

      map->width      = metrics->width;
      map->rows       = metrics->height;
      map->pixel_mode = FT_PIXEL_MODE_BGRA;
      map->pitch      = map->width * 4;
      map->num_grays  = 256;

      size = map->rows * map->pitch;

      error = ft_glyphslot_alloc_bitmap( slot, size );
      if ( error )
        goto DestroyExit;
    }

    /* convert palette/gray image to rgb */
    if ( color_type == PNG_COLOR_TYPE_PALETTE )
      png_set_palette_to_rgb( png );

    /* expand gray bit depth if needed */
    if ( color_type == PNG_COLOR_TYPE_GRAY )
    {
#if PNG_LIBPNG_VER >= 10209
      png_set_expand_gray_1_2_4_to_8( png );
#else
      png_set_gray_1_2_4_to_8( png );
#endif
    }

    /* transform transparency to alpha */
    if ( png_get_valid(png, info, PNG_INFO_tRNS ) )
      png_set_tRNS_to_alpha( png );

    if ( bitdepth == 16 )
      png_set_strip_16( png );

    if ( bitdepth < 8 )
      png_set_packing( png );

    /* convert grayscale to RGB */
    if ( color_type == PNG_COLOR_TYPE_GRAY       ||
         color_type == PNG_COLOR_TYPE_GRAY_ALPHA )
      png_set_gray_to_rgb( png );

    if ( interlace != PNG_INTERLACE_NONE )
      png_set_interlace_handling( png );

    png_set_filler( png, 0xFF, PNG_FILLER_AFTER );

    /* recheck header after setting EXPAND options */
    png_read_update_info(png, info );
    png_get_IHDR( png, info,
                  &imgWidth, &imgHeight,
                  &bitdepth, &color_type, &interlace,
                  NULL, NULL );

    if ( bitdepth != 8                              ||
        !( color_type == PNG_COLOR_TYPE_RGB       ||
           color_type == PNG_COLOR_TYPE_RGB_ALPHA ) )
    {
      error = FT_THROW( Invalid_File_Format );
      goto DestroyExit;
    }

    switch ( color_type )
    {
    default:
      /* Shouldn't happen, but fall through. */

    case PNG_COLOR_TYPE_RGB_ALPHA:
      png_set_read_user_transform_fn( png, premultiply_data );
      break;

    case PNG_COLOR_TYPE_RGB:
      /* Humm, this smells.  Carry on though. */
      png_set_read_user_transform_fn( png, convert_bytes_to_data );
      break;
    }

    if ( FT_NEW_ARRAY( rows, imgHeight ) )
    {
      error = FT_THROW( Out_Of_Memory );
      goto DestroyExit;
    }

    for ( i = 0; i < (FT_Int)imgHeight; i++ )
      rows[i] = map->buffer + ( y_offset + i ) * map->pitch + x_offset * 4;

    png_read_image( png, rows );

    FT_FREE( rows );

    png_read_end( png, info );

  DestroyExit:
    png_destroy_read_struct( &png, &info, NULL );
    FT_Stream_Close( &stream );

  Exit:
    return error;
  }
示例#4
0
文件: ftmac.c 项目: 32767/libgdx
  /* Create a new FT_Face from an SFNT resource, specified by res ID. */
  static FT_Error
  FT_New_Face_From_SFNT( FT_Library  library,
                         ResID       sfnt_id,
                         FT_Long     face_index,
                         FT_Face*    aface )
  {
    Handle     sfnt = NULL;
    FT_Byte*   sfnt_data;
    size_t     sfnt_size;
    FT_Error   error  = FT_Err_Ok;
    FT_Memory  memory = library->memory;
    int        is_cff, is_sfnt_ps;


    sfnt = GetResource( TTAG_sfnt, sfnt_id );
    if ( sfnt == NULL )
      return FT_Err_Invalid_Handle;

    sfnt_size = (FT_ULong)GetHandleSize( sfnt );
    if ( FT_ALLOC( sfnt_data, (FT_Long)sfnt_size ) )
    {
      ReleaseResource( sfnt );
      return error;
    }

    ft_memcpy( sfnt_data, *sfnt, sfnt_size );
    ReleaseResource( sfnt );

    is_cff     = sfnt_size > 4 && !ft_memcmp( sfnt_data, "OTTO", 4 );
    is_sfnt_ps = sfnt_size > 4 && !ft_memcmp( sfnt_data, "typ1", 4 );

    if ( is_sfnt_ps )
    {
      FT_Stream  stream;


      if ( FT_NEW( stream ) )
        goto Try_OpenType;

      FT_Stream_OpenMemory( stream, sfnt_data, sfnt_size );
      if ( !open_face_PS_from_sfnt_stream( library,
                                           stream,
                                           face_index,
                                           0, NULL,
                                           aface ) )
      {
        FT_Stream_Close( stream );
        FT_FREE( stream );
        FT_FREE( sfnt_data );
        goto Exit;
      }

      FT_FREE( stream );
    }
  Try_OpenType:
    error = open_face_from_buffer( library,
                                   sfnt_data,
                                   sfnt_size,
                                   face_index,
                                   is_cff ? "cff" : "truetype",
                                   aface );
  Exit:
    return error;
  }
示例#5
0
文件: sfobjs.c 项目: johndpope/Medusa
  static FT_Error
  woff_open_font( FT_Stream  stream,
                  TT_Face    face )
  {
    FT_Memory       memory = stream->memory;
    FT_Error        error  = FT_Err_Ok;

    WOFF_HeaderRec  woff;
    WOFF_Table      tables  = NULL;
    WOFF_Table*     indices = NULL;

    FT_ULong        woff_offset;

    FT_Byte*        sfnt        = NULL;
    FT_Stream       sfnt_stream = NULL;

    FT_Byte*        sfnt_header;
    FT_ULong        sfnt_offset;

    FT_Int          nn;
    FT_ULong        old_tag = 0;

    static const FT_Frame_Field  woff_header_fields[] =
    {
#undef  FT_STRUCTURE
#define FT_STRUCTURE  WOFF_HeaderRec

      FT_FRAME_START( 44 ),
        FT_FRAME_ULONG ( signature ),
        FT_FRAME_ULONG ( flavor ),
        FT_FRAME_ULONG ( length ),
        FT_FRAME_USHORT( num_tables ),
        FT_FRAME_USHORT( reserved ),
        FT_FRAME_ULONG ( totalSfntSize ),
        FT_FRAME_USHORT( majorVersion ),
        FT_FRAME_USHORT( minorVersion ),
        FT_FRAME_ULONG ( metaOffset ),
        FT_FRAME_ULONG ( metaLength ),
        FT_FRAME_ULONG ( metaOrigLength ),
        FT_FRAME_ULONG ( privOffset ),
        FT_FRAME_ULONG ( privLength ),
      FT_FRAME_END
    };


    FT_ASSERT( stream == face->root.stream );
    FT_ASSERT( FT_STREAM_POS() == 0 );

    if ( FT_STREAM_READ_FIELDS( woff_header_fields, &woff ) )
      return error;

    /* Make sure we don't recurse back here or hit TTC code. */
    if ( woff.flavor == TTAG_wOFF || woff.flavor == TTAG_ttcf )
      return FT_THROW( Invalid_Table );

    /* Miscellaneous checks. */
    if ( woff.length != stream->size                              ||
         woff.num_tables == 0                                     ||
         44 + woff.num_tables * 20UL >= woff.length               ||
         12 + woff.num_tables * 16UL >= woff.totalSfntSize        ||
         ( woff.totalSfntSize & 3 ) != 0                          ||
         ( woff.metaOffset == 0 && ( woff.metaLength != 0     ||
                                     woff.metaOrigLength != 0 ) ) ||
         ( woff.metaLength != 0 && woff.metaOrigLength == 0 )     ||
         ( woff.privOffset == 0 && woff.privLength != 0 )         )
      return FT_THROW( Invalid_Table );

    if ( FT_ALLOC( sfnt, woff.totalSfntSize ) ||
         FT_NEW( sfnt_stream )                )
      goto Exit;

    sfnt_header = sfnt;

    /* Write sfnt header. */
    {
      FT_UInt  searchRange, entrySelector, rangeShift, x;


      x             = woff.num_tables;
      entrySelector = 0;
      while ( x )
      {
        x            >>= 1;
        entrySelector += 1;
      }
      entrySelector--;

      searchRange = ( 1 << entrySelector ) * 16;
      rangeShift  = woff.num_tables * 16 - searchRange;

      WRITE_ULONG ( sfnt_header, woff.flavor );
      WRITE_USHORT( sfnt_header, woff.num_tables );
      WRITE_USHORT( sfnt_header, searchRange );
      WRITE_USHORT( sfnt_header, entrySelector );
      WRITE_USHORT( sfnt_header, rangeShift );
    }

    /* While the entries in the sfnt header must be sorted by the */
    /* tag value, the tables themselves are not.  We thus have to */
    /* sort them by offset and check that they don't overlap.     */

    if ( FT_NEW_ARRAY( tables, woff.num_tables )  ||
         FT_NEW_ARRAY( indices, woff.num_tables ) )
      goto Exit;

    FT_TRACE2(( "\n"
                "  tag    offset    compLen  origLen  checksum\n"
                "  -------------------------------------------\n" ));

    if ( FT_FRAME_ENTER( 20L * woff.num_tables ) )
      goto Exit;

    for ( nn = 0; nn < woff.num_tables; nn++ )
    {
      WOFF_Table  table = tables + nn;

      table->Tag        = FT_GET_TAG4();
      table->Offset     = FT_GET_ULONG();
      table->CompLength = FT_GET_ULONG();
      table->OrigLength = FT_GET_ULONG();
      table->CheckSum   = FT_GET_ULONG();

      FT_TRACE2(( "  %c%c%c%c  %08lx  %08lx  %08lx  %08lx\n",
                  (FT_Char)( table->Tag >> 24 ),
                  (FT_Char)( table->Tag >> 16 ),
                  (FT_Char)( table->Tag >> 8  ),
                  (FT_Char)( table->Tag       ),
                  table->Offset,
                  table->CompLength,
                  table->OrigLength,
                  table->CheckSum ));

      if ( table->Tag <= old_tag )
      {
        FT_FRAME_EXIT();
        error = FT_THROW( Invalid_Table );
        goto Exit;
      }

      old_tag     = table->Tag;
      indices[nn] = table;
    }

    FT_FRAME_EXIT();

    /* Sort by offset. */

    ft_qsort( indices,
              woff.num_tables,
              sizeof ( WOFF_Table ),
              compare_offsets );

    /* Check offsets and lengths. */

    woff_offset = 44 + woff.num_tables * 20L;
    sfnt_offset = 12 + woff.num_tables * 16L;

    for ( nn = 0; nn < woff.num_tables; nn++ )
    {
      WOFF_Table  table = indices[nn];


      if ( table->Offset != woff_offset                         ||
           table->CompLength > woff.length                      ||
           table->Offset > woff.length - table->CompLength      ||
           table->OrigLength > woff.totalSfntSize               ||
           sfnt_offset > woff.totalSfntSize - table->OrigLength ||
           table->CompLength > table->OrigLength                )
      {
        error = FT_THROW( Invalid_Table );
        goto Exit;
      }

      table->OrigOffset = sfnt_offset;

      /* The offsets must be multiples of 4. */
      woff_offset += ( table->CompLength + 3 ) & ~3U;
      sfnt_offset += ( table->OrigLength + 3 ) & ~3U;
    }

    /*
     * Final checks!
     *
     * We don't decode and check the metadata block.
     * We don't check table checksums either.
     * But other than those, I think we implement all
     * `MUST' checks from the spec.
     */

    if ( woff.metaOffset )
    {
      if ( woff.metaOffset != woff_offset                  ||
           woff.metaOffset + woff.metaLength > woff.length )
      {
        error = FT_THROW( Invalid_Table );
        goto Exit;
      }

      /* We have padding only ... */
      woff_offset += woff.metaLength;
    }

    if ( woff.privOffset )
    {
      /* ... if it isn't the last block. */
      woff_offset = ( woff_offset + 3 ) & ~3U;

      if ( woff.privOffset != woff_offset                  ||
           woff.privOffset + woff.privLength > woff.length )
      {
        error = FT_THROW( Invalid_Table );
        goto Exit;
      }

      /* No padding for the last block. */
      woff_offset += woff.privLength;
    }

    if ( sfnt_offset != woff.totalSfntSize ||
         woff_offset != woff.length        )
    {
      error = FT_THROW( Invalid_Table );
      goto Exit;
    }

    /* Write the tables. */

    for ( nn = 0; nn < woff.num_tables; nn++ )
    {
      WOFF_Table  table = tables + nn;


      /* Write SFNT table entry. */
      WRITE_ULONG( sfnt_header, table->Tag );
      WRITE_ULONG( sfnt_header, table->CheckSum );
      WRITE_ULONG( sfnt_header, table->OrigOffset );
      WRITE_ULONG( sfnt_header, table->OrigLength );

      /* Write table data. */
      if ( FT_STREAM_SEEK( table->Offset )     ||
           FT_FRAME_ENTER( table->CompLength ) )
        goto Exit;

      if ( table->CompLength == table->OrigLength )
      {
        /* Uncompressed data; just copy. */
        ft_memcpy( sfnt + table->OrigOffset,
                   stream->cursor,
                   table->OrigLength );
      }
      else
      {
#ifdef FT_CONFIG_OPTION_USE_ZLIB

        /* Uncompress with zlib. */
        FT_ULong  output_len = table->OrigLength;


        error = FT_Gzip_Uncompress( memory,
                                    sfnt + table->OrigOffset, &output_len,
                                    stream->cursor, table->CompLength );
        if ( error )
          goto Exit;
        if ( output_len != table->OrigLength )
        {
          error = FT_THROW( Invalid_Table );
          goto Exit;
        }

#else /* !FT_CONFIG_OPTION_USE_ZLIB */

        error = FT_THROW( Unimplemented_Feature );
        goto Exit;

#endif /* !FT_CONFIG_OPTION_USE_ZLIB */
      }

      FT_FRAME_EXIT();

      /* We don't check whether the padding bytes in the WOFF file are     */
      /* actually '\0'.  For the output, however, we do set them properly. */
      sfnt_offset = table->OrigOffset + table->OrigLength;
      while ( sfnt_offset & 3 )
      {
        sfnt[sfnt_offset] = '\0';
        sfnt_offset++;
      }
    }

    /* Ok!  Finally ready.  Swap out stream and return. */
    FT_Stream_OpenMemory( sfnt_stream, sfnt, woff.totalSfntSize );
    sfnt_stream->memory = stream->memory;
    sfnt_stream->close  = sfnt_stream_close;

    FT_Stream_Free(
      face->root.stream,
      ( face->root.face_flags & FT_FACE_FLAG_EXTERNAL_STREAM ) != 0 );

    face->root.stream = sfnt_stream;

    face->root.face_flags &= ~FT_FACE_FLAG_EXTERNAL_STREAM;

  Exit:
    FT_FREE( tables );
    FT_FREE( indices );

    if ( error )
    {
      FT_FREE( sfnt );
      FT_Stream_Close( sfnt_stream );
      FT_FREE( sfnt_stream );
    }

    return error;
  }