[XaraXtreme-dev] Some question about XARFormatDocument

[Eric Suen <eric_suen_cn@xxxxxxxxxxxx>]

Hi,

  I have some question about XARFormatDocument.pdf.
  
1. Is xara an open standard file format? for examples:
  SWF is not, you can read the Specification, but you can't
  use it to create software which supports SWF file playback.
  can I use xar do anything I wanted? like extend it and create
  my own drawing software?
  
2. found some bugs in XARFormatDocument.pdf:
(1) page 70 bottom,  it said for relative path, the data is:
  number of coords(4bytes) + <verb, coords list>(9bytes), but 
  for two points path, I got size is 18 which can divid by 9,
  so, the Data should not include number, because the
  number = record size / 9
(2) same page: the relative co-ordinate (0x11223344, 0xAABBCCDD)
  will be stored as the following stream of bytes:
  0x44, 0xDD, 0x33, 0xCC, 0x22, 0xBB, 0x11, 0xAA
  but the actuly sequence I got is:
  [0x0, 0x0, 0x0, 0x0, 0x0, 0x1, 0x0, 0x77]
  [0xff, 0x0, 0xfe, 0x0, 0xdb, 0x0, 0x8, 0x0]
  which present: (0, 375) (-75000, 0)
3. page 265 said TAG_REGULAR_SHAPE_PHASE_2 has been deprecated
  in favour of TAG_POLYGON_COMPLEX_ROUNDED_STELLATED_REFORMED.
  but why Rectangle & Ellipse all saved as TAG_REGULAR_SHAPE_PHASE_2
  
Regards

Eric


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