OptiPNG / News: Recent posts

OptiPNG 0.7.5 released

Dear OptiPNG users,

OptiPNG version 0.7.5, a maintenance update that contains compatibility fixes regarding libpng-1.5 and libpng-1.6, as well as a few other minor additions, has been released. See the HISTORY document for more information.

http://optipng.sourceforge.net/
https://sourceforge.net/projects/optipng/files/OptiPNG/optipng-0.7.5/

Posted by Cosmin Truta 2014-03-25

OptiPNG 0.7.4 released

Dear OptiPNG users,

OptiPNG version 0.7.4, containing a security fix for all previous 0.7.x versions, has been released. (This is a follow-up on the fix issued in version 0.7.3.) We strongly recommend upgrading.

Version Hg has been fixed also.

Version 0.6.5 and earlier are not affected.

See the Security Information section for more details.
http://optipng.sourceforge.net/
https://sourceforge.net/projects/optipng/files/OptiPNG/optipng-0.7.4/

Posted by Cosmin Truta 2012-10-22

OptiPNG 0.7.3 released

Dear OptiPNG users,

OptiPNG version 0.7.3, containing an important security fix for all previous 0.7.x versions, has been released. We strongly recommend upgrading.
Version Hg has been fixed also.

Version 0.6.5 and earlier are not affected.

See the Security Information section for more details.
http://optipng.sourceforge.net/
https://sourceforge.net/projects/optipng/files/OptiPNG/optipng-0.7.3/

Posted by Cosmin Truta 2012-09-17

Lossless PNG image reductions

[This announcement is for the developers of libpng-based PNG encoders.]

The lossless PNG image reduction code (opngreduc) is now available as a top-level module. Making your PNG encoder more efficient is as easy as an #include "opngreduc.h" and a call to opng_reduce_image().

The principle behind image reductions is explained in detailed in the PNG optimization guide, section 2.1 "The PNG image type".
http://optipng.sourceforge.net/pngtech/png_optimization.html

Posted by Cosmin Truta 2012-08-25

OptiPNG 0.7.2 released

Dear users,

OptiPNG version 0.7.2, a maintenance release that contains minor fixes and library updates, has been released. See the HISTORY document for more information.

http://optipng.sourceforge.net/
https://sourceforge.net/projects/optipng/files/OptiPNG/optipng-0.7.2/

Posted by Cosmin Truta 2012-08-25

OptiPNG 0.7.1 released

Dear OptiPNG users,

An important image-altering regression, affecting version 0.7, has been fixed. We strongly recommend upgrading to version 0.7.1, which is now available.

Version Hg has been fixed also.

Version 0.6.5 and earlier are not affected.

http://optipng.sourceforge.net/
https://sourceforge.net/projects/optipng/files/OptiPNG/optipng-0.7.1/

Many thanks to Adam Ciarciński for discovering and fixing this defect.

Posted by Ramona Truta 2012-03-20

OptiPNG available on Mercurial repo

Dear faithful OptiPNG users,

It is my pleasure to announce the publication of my development branch to a Mercurial repository at SourceForge. You may browse, build, enhance, fork, distribute for free, or make money out of this bleeding-edge (but well-tested!) code, in any way you see fit, as long as you comply to the terms of its license. Should you write code that eventually lands in the main source tree, you will become a contributing author, unless you decline and prefer to assign your copyright to me instead.... read more

Posted by Cosmin Truta 2012-03-06

OptiPNG 0.6.5 released

Dear OptiPNG users,

As version 0.7 was being developed and is nearing public release, many of the fixes have been back-ported to the 0.6 line. OptiPNG 0.6.5 is mostly a fix-only, recommended release. Details are available in the HISTORY document.

OptiPNG home page:
http://optipng.sourceforge.net/

OptiPNG license:
http://optipng.sourceforge.net/LICENSE.txt

OptiPNG history:
http://optipng.sourceforge.net/HISTORY.txt... read more

Posted by Cosmin Truta 2011-01-25

OptiPNG 0.6.4 released

Dear OptiPNG users,

OptiPNG version 0.6.4 is being released in order to catch up with the latest and greatest versions of the supporting libraries, zlib version 1.2.4, and libpng version 1.4.1. There are a few features added as well. Check out the HISTORY document for more information.

OptiPNG home page:
http://optipng.sourceforge.net/

OptiPNG license:
http://optipng.sourceforge.net/LICENSE.txt

OptiPNG history:
http://optipng.sourceforge.net/HISTORY.txt... read more

Posted by Cosmin Truta 2010-03-16

OptiPNG 0.6.3 released

OptiPNG is a PNG optimizer that recompresses image files to a smaller size, without losing any information. The program also converts external formats (BMP, GIF, PNM and uncompressed TIFF) to optimized PNG, and performs PNG integrity checks and corrections.

OptiPNG 0.6.3 is a maintenance release that contains important fixes, including a security fix. Check out the HISTORY document for more information.... read more

Posted by Cosmin Truta 2009-05-19

OptiPNG 0.6.2 released

OptiPNG is a PNG optimizer that recompresses image files to a smaller size, without losing any information. The program also converts external formats (BMP, GIF, PNM and uncompressed TIFF) to optimized PNG, and performs PNG integrity checks and corrections.

OptiPNG 0.6.2 is a maintenance release that contains important fixes. Check out the HISTORY document for more info.

OptiPNG home page:
http://optipng.sourceforge.net/... read more

Posted by Cosmin Truta 2008-11-11

OptiPNG 0.6.1 released

OptiPNG is a PNG optimizer that recompresses image files to a smaller size, without losing any information. The program also converts external formats (BMP, GIF, PNM and uncompressed TIFF) to optimized PNG, and performs PNG integrity checks and corrections.

OptiPNG 0.6.1 is a maintenance release. Check out the HISTORY document for more info.

OptiPNG home page:
http://optipng.sourceforge.net/

OptiPNG license:
http://optipng.sourceforge.net/LICENSE.txt... read more

Posted by Cosmin Truta 2008-07-21

OptiPNG 0.6 released

OptiPNG is a PNG optimizer that recompresses image files to a smaller size, without losing any information. The program also converts external formats (BMP, GIF, PNM and uncompressed TIFF) to optimized PNG, and performs PNG integrity checks and corrections.

We are happy to announce the release of OptiPNG 0.6. This version provides a suite of new features, as well as defect fixes.
Check out the HISTORY document for more information.... read more

Posted by Cosmin Truta 2008-06-16

OptiPNG 0.5.5 released

OptiPNG is a PNG optimizer that recompresses image files to a smaller size, without losing any information. The program also converts external formats (BMP, GIF, PNM and uncompressed TIFF) to optimized PNG, and performs PNG integrity checks and corrections.

OptiPNG 0.5.5 is a maintenance release. Check out the HISTORY document for more info.

OptiPNG home page:
http://optipng.sourceforge.net/

OptiPNG downloads:
http://sourceforge.net/project/showfiles.php?group_id=151404

Posted by Cosmin Truta 2007-01-29

OptiPNG 0.5.4 released

OptiPNG is a PNG optimizer that recompresses image files to a smaller size, without losing any information. The program also converts external formats (BMP, GIF, PNM and uncompressed TIFF) to optimized PNG, and performs PNG integrity checks and corrections.

OptiPNG 0.5.4 is a maintenance release. Check out the HISTORY document for more info.

OptiPNG home page:
http://optipng.sourceforge.net/

OptiPNG downloads:
http://sourceforge.net/project/showfiles.php?group_id=151404

Posted by Cosmin Truta 2006-08-11

OptiPNG 0.5.3 released

OptiPNG is a PNG optimizer that recompresses image files to a smaller size, without losing any information. The program also converts external formats (BMP, GIF, PNM and uncompressed TIFF) to optimized PNG, and performs PNG integrity checks and corrections.

OptiPNG 0.5.3 is a maintenance release, with added TIFF support and a speed improvement. Check out the HISTORY document for more info.

OptiPNG home page:
http://optipng.sourceforge.net/... read more

Posted by Cosmin Truta 2006-07-24

OptiPNG 0.5.2 released

OptiPNG is a PNG optimizer that recompresses image files to a smaller size, without losing any information. The program also converts external formats (BMP, GIF, PNM; TIFF support is coming up) to optimized PNG, and performs PNG integrity checks and corrections.

OptiPNG 0.5.2 is a maintenance release, with minor improvements and a typo correction.

OptiPNG home page:
http://optipng.sourceforge.net/... read more

Posted by Cosmin Truta 2006-05-08