jpeg_upsampler

type jpeg_upsampler = record

  start_pass: procedure(

  cinfo: j_decompress_ptr

);

  upsample: procedure(

  cinfo: j_decompress_ptr;

  input_buf: JSAMPIMAGE;

  var in_row_group_ctr: JDIMENSION;

  in_row_groups_avail: JDIMENSION;

  output_buf: JSAMPARRAY;

  var out_row_ctr: JDIMENSION;

  out_rows_avail: JDIMENSION

);

  need_context_rows: Boolean;

end;