Version 1.5.0:

    - Separated some of the code into other libraries - IlmBase and

      OpenEXR_Viewers - for easier integration with CTL.

Version 1.4.0a:

    - Fix for Visual Studio .NET 2003 ReleaseDLL builds.

Version 1.4.0:

    - Production release.

    - Bug fix for setFrameBuffer() on a tiled file.

Version 1.3.1:

    - Fixed the ReleaseDLL targets on Visual Studio 2005.

Version 1.3.0:

    - The 1.3.x series is a developer-only release for testing 

      OpenEXR's new multithreaded I/O support.

    - Multithread support for reading and writing an OpenEXR

      file.

    - Support for Intel-based OS X systems.

    - Support for Visual Studio 2005.

    - When compiling against OpenEXR headers, there's no longer any

      need to define any PLATFORM_* or HAVE_* macros; OpenEXR now

      supplies an OpenEXRConfig.h header file which is included by

      the OpenEXR headers that need these special macros.  However,

      on Windows platforms, when using OpenEXR DLLs, you must still

      define the OPENEXR_DLL preprocessor directive in your project.

    - New documentation for multithread support, plus some

      updates and additions.

    - Bug fixes releated to better handling of incomplete/damaged 

      files.

    - Numerous bug fixes and cleanups to the autoconf-based

      build system.

    - Removed support for the following configurations that were

      previously supported.  Some of these configurations may happen

      to continue to function, but we can't help you if they don't,

      largely because we don't have any way to test OpenEXR on these

      configurations.

      	   - IRIX 

      	   - OSF1

	   - SunOS

	   - OS X versions prior to 10.3.

	   - gcc on any platform prior to version 3.3

Version 1.2.2:

    - New build system for Windows; support for DLLs.

    - Imath: Removed TMatrix<T> classes; these classes are still

      under development and are too difficult to keep in sync

      with OpenEXR CVS.

    - IlmImf: support for image layers in ChannelList.

    - IlmImf: added isComplete() method to file classes to check

      whether a file is complete.

    - IlmImf: exposed staticInitialize() in ImfHeader.h in

      order to allow thread-safe library initialization in

      multithreaded applications.

    - IlmImf: New "time code" standard attribute.

    - exrdisplay: support for displaying wrap-around texture map

      images.

    - exrmaketiled: can now specify wrap mode.

    - IlmImf: New "wrapmodes" standard attribute to indicate

      extrapolation mode for mipmaps and ripmaps.

    - IlmImf: New "key code" standard attribute to identify motion

      picture film frames.

Version 1.2.1:

    - reduced memory footprint of exrenvmap and exrmaketiled 

      utilities.

    - IlmImf: new helper functions to determine whether a

      file is an OpenEXR file, and whether it's scanline- or

      tile-based.

    - IlmImf: bug fix for PXR24 compression with ySampling != 1.

    - Imath: a few new enhancements

    - Better support for gcc 3.4.

    - Warning cleanups in Visual C++.

Version 1.2:

    - Production-ready release.

    - Support for gcc 3.4.

    - Supports gcc 2.95 again.

    - IlmImf: bug fix for handling broken OpenEXR files without

      crashing.

Version 1.1.1:

    - Added Pixar's new "slightly lossy" image compression method

      for FLOAT channels, called PXR24.  HALF and UINT channels

      are compressed without loss.

    - Changed top-level LICENSE file to allow for other copyright

      holders for individual files.

    - Reading tiled files with the scanline interface is faster.

    - OpenEXR now supports YCA (luminance/chroma/alpha) images with

      subsampled chroma channels.

    - IlmImf: various bug fixes.

    - The half class is now faster in some expressions.

    - New tiled file format.  The new format is incompatible with

      the format used by 1.1.0.

Version 1.1.0:

    - IlmImfExamples: Updated to include examples of how to use

      the tiling and mip/ripmapping interfaces.

    - exrmakepreview: A new utility for embedding preview images

      in OpenEXR files.

    - exrenvmap: A new utility for creating OpenEXR environment maps.

    - exrstdattr: A new utility for manipulating standard attributes.

    - exrdisplay: Support for tiled, mip/ripmapped images, display

      windows, and preview images.

    - exrmaketiled: A new utility which generates tiled versions

      of OpenEXR images.

    - exrheader: Support for tiles, mipmaps, environment maps.

    - IlmImf: Support for environment maps.

    - IlmImf: Support for abstracted stream I/O.  You can

      wrap the IStream and OStream classes around your API

      of choice (FILE *, fd, even an HTTP 1.1 stream) as long

      as it supports seeking.

    - IlmImf: Support for tiled and mip/ripmapped files.  This

      requires a new file format.  Scanline files generated by

      the 1.1.0 version of the library can be read by older

      versions, but tiled files can only be read by 1.1.0 or

      greater.

    - Imath: added TMatrix*, generic 2D matricies and algorithms.

    - Imath: various updates and bug fixes.

Version 1.0.7:

    - Support for "optional standard" attributes:

	Primary and white point chromaticities.

	Absolute luminance.

	Content owner

	Comments

	Image acquisition time and place

	Focus distance

	Lens aperture

	Film sensitivity

      If you want to use these new attributes in your application, see

      ImfStandardAttributes.h for documentation on what they are and how

      to use them.

    - Bug fix in OpaqueAttributes.

Version 1.0.6:

    - Support for embedded preview images (thumbnails).

    - Automatic frame buffer type conversion.

    - Support for Visual Studio .NET 2003 w/ Microsoft's C++ compiler.

    - Minor bug fixes.

Version 1.0.5:

    - PIZ decoding should be 20-60% faster on Athlon and Pentium 4

      systems.

    - exrdisplay supports hardware rendering with vp30 profile fragment

      shaders.

    - Support for Win32 with Visual Studio 6.0 and Intel C++ compiler

      version 7.0.

    - Support for gcc 2.95.

    - New exrheader utility.

    - exrdisplay works on Win32 and OS X now.

    - Minor bug fixes.

Version 1.0.4:

    - Released under the new modified BSD license.

Version 1.0.3:

    - Even more OS X fixes.

    - Support for Metrowerks Codewarrior compiler.  Enables OpenEXR code

      to be used in a MacOS Photoshop plugin, if someone wants to write

      one. ;)

    - Fixed a bug in Imath, added some new confidence tests to ImathTest.

    - Other minor fixes.

    - Install include files.

    - exrdisplay requires fltk 1.1+ now.

Version 1.0.2:

    - More OS X fixes.

    - Fixed a rotation bug in Imath.

Version 1.0.1:

    - OS X fixes.

    - Removed the example images; these are now distributed separately.

Version 1.0:

    - official release.

Version 0.9:

    - another limited release.

    - included exrdisplay viewer and sample EXR images.

Version 0.8:

    - initial limited release.