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1.2.2 (not yet released)
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========================
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[1] The tjDecompressToYUV() function now supports the TJFLAG_FASTDCT flag.
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[2] The 32-bit supplementary package for amd64 Debian systems now provides
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[1] 'make test' now works properly on FreeBSD, and it no longer requires the
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md5sum executable to be present on other Un*x platforms.
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[2] Overhauled the packaging system:
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-- To avoid conflict with vendor-supplied libjpeg-turbo packages, the
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official RPMs and DEBs for libjpeg-turbo have been renamed to
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"libjpeg-turbo-official".
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-- The TurboJPEG libraries are now located under /opt/libjpeg-turbo in the
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official Linux and Mac packages, to avoid conflict with vendor-supplied
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packages and also to streamline the packaging system.
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-- Release packages are now created with the directory structure defined
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by the configure variables "prefix", "bindir", "libdir", etc. (Un*x) or by the
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CMAKE_INSTALL_PREFIX variable (Windows.) The exception is that the docs are
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always located under the system default documentation directory on Un*x and Mac
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systems, and on Windows, the TurboJPEG DLL is always located in the Windows
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-- To avoid confusion, official libjpeg-turbo packages on Linux/Unix platforms
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(except for Mac) will always install the 32-bit libraries in
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/opt/libjpeg-turbo/lib32 and the 64-bit libraries in /opt/libjpeg-turbo/lib64.
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-- Fixed an issue whereby, in some cases, the libjpeg-turbo executables on Un*x
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systems were not properly linking with the shared libraries installed by the
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-- Fixed an issue whereby building the "installer" target on Windows when
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WITH_JAVA=1 would fail if the TurboJPEG JAR had not been previously built.
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-- Building the "install" target on Windows now installs files into the same
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places that the installer does.
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[3] Fixed a Huffman encoder bug that prevented I/O suspension from working
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[1] Added support for additional scaling factors (3/8, 5/8, 3/4, 7/8, 9/8, 5/4,
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11/8, 3/2, 13/8, 7/4, 15/8, and 2) when decompressing. Note that the IDCT will
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not be SIMD-accelerated when using any of these new scaling factors.
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[2] The TurboJPEG dynamic library is now versioned. It was not strictly
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necessary to do so, because TurboJPEG uses versioned symbols, and if a function
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changes in an ABI-incompatible way, that function is renamed and a legacy
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function is provided to maintain backward compatibility. However, certain
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Linux distro maintainers have a policy against accepting any library that isn't
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[3] Extended the TurboJPEG Java API so that it can be used to compress a JPEG
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image from and decompress a JPEG image to an arbitrary position in a large
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[4] The tjDecompressToYUV() function now supports the TJFLAG_FASTDCT flag.
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[5] The 32-bit supplementary package for amd64 Debian systems now provides
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symlinks in /usr/lib/i386-linux-gnu for the TurboJPEG libraries in /usr/lib32.
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This allows those libraries to be used on MultiArch-compatible systems (such as
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Ubuntu 11 and later) without setting the linker path.
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[6] The TurboJPEG Java wrapper should now find the JNI library on Mac systems
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without having to pass -Djava.library.path=/usr/lib to java.
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[7] TJBench has been ported to Java to provide a convenient way of validating
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the performance of the TurboJPEG Java API. It can be run with
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'java -cp turbojpeg.jar TJBench'.
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[8] cjpeg can now be used to generate JPEG files with the RGB colorspace
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(feature ported from jpeg-8d.)
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[9] The width and height in the -crop argument passed to jpegtran can now be
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suffixed with "f" to indicate that, when the upper left corner of the cropping
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region is automatically moved to the nearest iMCU boundary, the bottom right
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corner should be moved by the same amount. In other words, this feature causes
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jpegtran to strictly honor the specified width/height rather than the specified
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bottom right corner (feature ported from jpeg-8d.)
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[10] JPEG files using the RGB colorspace can now be decompressed into grayscale
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images (feature ported from jpeg-8d.)
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[11] Fixed a regression caused by 1.2.1[7] whereby the build would fail with
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multiple "Mismatch in operand sizes" errors when attempting to build the x86
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SIMD code with NASM 0.98.
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[12] The in-memory source/destination managers (jpeg_mem_src() and
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jpeg_mem_dest()) are now included by default when building libjpeg-turbo with
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libjpeg v6b or v7 emulation, so that programs can take advantage of these
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functions without requiring the use of the backward-incompatible libjpeg v8
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ABI. The "age number" of the libjpeg-turbo library on Un*x systems has been
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incremented by 1 to reflect this. You can disable this feature with a
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configure/CMake switch in order to retain strict API/ABI compatibility with the
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libjpeg v6b or v7 API/ABI (or with previous versions of libjpeg-turbo.) See
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README-turbo.txt for more details.
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[13] Added ARM v7s architecture to libjpeg.a and libturbojpeg.a in the official
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libjpeg-turbo binary package for OS X, so that those libraries can be used to
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build applications that leverage the faster CPUs in the iPhone 5 and iPad 4.
added
removed
ChangeLog.txt
