Changes from v2.0-rc8 → v2.0 (2008-05-26)

• Remove undocumented low-pass filter code
• Add missing PngConfig documentation
• Remove use of ProGuard

Changes from v2.0-rc6 → v2.0-rc8 (2008-04-10)

• Fix bug skipping over extra IDAT data
• Fix bug with tRNS chunk in paletted images
• Fix CRC calculation bug
• Allow multiple private chunks
• Some low-level changes needed by APNG code

(skipped rc7)

Changes from v2.0-rc5 → v2.0-rc6 (2006-12-01)

• Fix bugs found by FindBugs
• Change chunk read method to use DataInput instead of PngInputStream
• Fix stereo chunk parsing
• Fix compressed iTXt parsing
• Remove PngChunk, fold constants into PngConstants
• Add suite of broken images, for test coverage

Changes from v2.0-rc4 → v2.0-rc5 (2006-06-12)

• Added PngConfig.READ_EXCEPT_METADATA
• Better progressive performance
• Support image source region
• Reduced number of classes to make jar smaller
• Use ProGuard to make jar smaller
• Eliminate all use of reflection
• Combine ext package into main package
• Support new sTER registered chunk
• Performance improvements
• Removed get/setUserExponent from configuration
• Removed support for limiting pass decoding
• Use Builder pattern for PngConfig to make configuration immutable

Changes from v2.0-rc3 → v2.0-rc4 (2006-04-05)

• Java IIO-compatible plugin (thanks to Dimitri Koussa)
• Change sBIT to use byte[] instead of int
• Support decimation subsampling
• Support limiting decoding of passes to a particular range

Changes from v2.0-rc2 → v2.0-rc3 (2005-10-07)

• Fix decoding when there is leftover IDAT data
• Move some methods from PngConfig to PngImage
• Add handleProgress methods to PngImage
• Support abort from handleFrame, handleProgress

Changes from v2.0-rc1 → v2.0-rc2 (2005-09-14)

• Fixed a buffering bug in PngInputStream
• Made PngImage implement java.awt.Transparency

Changes from v1.3.0 → v2.0-rc1 (2005-08-05)

• Complete rewrite, now requires Java 1.2 or higher
• Uses the modern BufferedImage-based Java APIs
• Decoded images use less memory
• Smaller jar file (under 35K)
• Access to raw image data
• 16-bit images do not have to be reduced to 8-bit
• Faster decoding
• License changed from LGPL to GPL-with-library-exception (the same as the GNU Classpath project)