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Latest News Approved - With Summaries
libredwg-0.9 released
     posted by reini_urban, Sun 06 Oct 2019 03:21:48 PM UTC - 0 replies

This is a major release, the first beta,
adding the new dxf importer, and dxf2dwg (experimental),
the first usage of the new dynapi and the encoder.

More here: and ...

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libredwg-0.8 released
     posted by reini_urban, Tue 25 Jun 2019 09:55:44 AM UTC - 0 replies

This is a major release, adding the new dynamic API, read and write
all header and object fields by name. Many of the old dwg_api.h field
accessors are deprecated.
More here: and ...

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libredwg-0.7 released
     posted by reini_urban, Thu 06 Dec 2018 12:07:23 AM UTC - 0 replies

See and

new API:
  * add dwg_get_OBJECT(dwg) API for all objects in a DWG.
    analog to dwg_get_ENTITY, but including all objects, tables, ...

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libredwg-0.6.2 released
     posted by reini_urban, Wed 07 Nov 2018 10:51:55 AM UTC - 0 replies

Important bugfixes:
  * Fixed several out_dxf segfaults (#39)
  * Enhanced the section size limit from 2032 to 2040.
    There were several DWG files with a section size of 2035
    in the wild. (PR #41, Denis Pryt)
  * Fixed EED realloc on decoding when end - dat->byte == 1 ...

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libredwg-0.6.1 released [alpha]
     posted by reini_urban, Mon 05 Nov 2018 01:07:32 PM UTC - 0 replies

This is a minor bugfix release, fixing
mostly a decoding error with LWPOLYLINE points.

Here are the compressed sources:   (9.8MB)   (3.7MB) ...

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libredwg-0.6 released [alpha]
     posted by reini_urban, Mon 13 Aug 2018 09:48:15 AM UTC - 0 replies


API breaking changes:
  * Removed dwg_obj_proxy_get_reactors(), use dwg_obj_get_reactors() instead.
  * Renamed SORTENTSTABLE.owner_handle to SORTENTSTABLE.owner_dict.
  * Renamed all -as-rNNNN program options to --as-rNNNN. ...

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Revealing unknown DWG classes (2)
     posted by reini_urban, Fri 27 Jul 2018 09:55:16 AM UTC - 0 replies

I've added more solver code and a more detailled explanation to the  HACKING file, to find the binary layout of unknown DWG classes, in reference to public docs and generated DXF files. See for the first part. ...

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Revealing unknown DWG classes
     posted by reini_urban, Fri 13 Jul 2018 10:11:01 PM UTC - 0 replies

I implemented three major buzzwords today in some trivial ways.

  • massive parallel processing
  • asynchronous processing
  • machine-learning: a self-improving program

The problem is mostly trivial, and the solutions also.  I need to
reverse-engineer a binary closed file-format, but got some hints from ...

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Major speedup for big DWG's
     posted by reini_urban, Mon 11 Jun 2018 06:15:49 PM UTC - 0 replies

Thanks to David Bender and James Michael DuPont for convincing me that we need a hash table  for really big DWGs. I got a DWG example with 42MB, which needed 2m to process and then 3m to free the dwg struct. I also had to fix a couple of internal problems. ...

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Older News Approved
Enabled r2018 support posted by reini_urban, Mon 04 Jun 2018 08:40:47 AM UTC - 0 replies
Smokers and mirrors posted by reini_urban, Tue 08 May 2018 04:13:26 PM UTC - 0 replies
New hackers' wiki posted by pitanga, Wed 13 Jan 2010 01:41:11 AM UTC - 0 replies
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