ChangeLog.txt - third_party/libjpeg-turbo - Git at Google

 1.1.90 (1.2 beta1)
 ==================

 [1] Added a JNI wrapper for TurboJPEG/OSS.  See java/README for more details.

 [2] TurboJPEG/OSS can now scale down images during decompression.


 1.1.0
 =====

 [1] The algorithm used by the SIMD quantization function cannot produce correct
 results when the JPEG quality is >= 98 and the fast integer forward DCT is
 used.  Thus, the non-SIMD quantization function is now used for those cases,
 and libjpeg-turbo should now produce identical output to libjpeg v6b in all
 cases.

 [2] Despite the above, the fast integer forward DCT still degrades somewhat for
 JPEG qualities greater than 95, so TurboJPEG/OSS will now automatically use the
 slow integer forward DCT when generating JPEG images of quality 96 or greater.
 This reduces compression performance by as much as 15% for these high-quality
 images but is necessary to ensure that the images are perceptually lossless.
 It also ensures that the library can avoid the performance pitfall created by
 [1].

 [3] Ported jpgtest.cxx to pure C to avoid the need for a C++ compiler.

 [4] Fixed visual artifacts in grayscale JPEG compression caused by a typo in
 the RGB-to-chrominance lookup tables.

 [5] The Windows distribution packages now include the libjpeg run-time programs
 (cjpeg, etc.)

 [6] All packages now include jpgtest.


 1.0.90 (1.1 beta1)
 ==================

 [1] Added emulation of the libjpeg v7 and v8 APIs and ABIs.  See
 README-turbo.txt for more details.  This feature was sponsored by CamTrace SAS.

 [2] Created a new CMake-based build system for the Visual C++ and MinGW builds.

 [3] TurboJPEG/OSS can now compress from/decompress to grayscale bitmaps.

 [4] jpgtest can now be used to test decompression performance with existing
 JPEG images.

 [5] If the default install prefix (/opt/libjpeg-turbo) is used, then
 'make install' now creates /opt/libjpeg-turbo/lib32 and
 /opt/libjpeg-turbo/lib64 sym links to duplicate the behavior of the binary
 packages.

 [6] All symbols in the libjpeg-turbo dynamic library are now versioned, even
 when the library is built with libjpeg v6b emulation.

 [7] Added arithmetic encoding and decoding support (can be disabled with
 configure or CMake options)

 [8] Added a TJ_YUV flag to TurboJPEG/OSS which causes both the compressor and
 decompressor to output planar YUV images.

 [9] Added an extended version of tjDecompressHeader() to TurboJPEG/OSS which
 allows the caller to determine the type of subsampling used in a JPEG image.

 [10] Added further protections against invalid Huffman codes.


 1.0.1
 =====

 [1] The Huffman decoder will now handle erroneous Huffman codes (for instance,
 from a corrupt JPEG image.)  Previously, these would cause libjpeg-turbo to
 crash under certain circumstances.

 [2] Fixed typo in SIMD dispatch routines which was causing 4:2:2 upsampling to
 be used instead of 4:2:0 when decompressing JPEG images using SSE2 code.

 [3] configure script will now automatically determine whether the
 INCOMPLETE_TYPES_BROKEN macro should be defined.


 1.0.0
 =====

 [1] 2983700: Further FreeBSD build tweaks (no longer necessary to specify
 --host when configuring on a 64-bit system)

 [2] Created sym. links in the Unix/Linux packages so that the TurboJPEG
 include file can always be found in /opt/libjpeg-turbo/include, the 32-bit
 static libraries can always be found in /opt/libjpeg-turbo/lib32, and the
 64-bit static libraries can always be found in /opt/libjpeg-turbo/lib64.

 [3] The Unix/Linux distribution packages now include the libjpeg run-time
 programs (cjpeg, etc.) and man pages.

 [4] Created a 32-bit supplementary package for amd64 Debian systems which
 contains just the 32-bit libjpeg-turbo libraries.

 [5] Moved the libraries from */lib32 to */lib in the i386 Debian package.

 [6] Include distribution package for Cygwin

 [7] No longer necessary to specify --without-simd on non-x86 architectures, and
 unit tests now work on those architectures.


 0.0.93
 ======

 [1] 2982659, Fixed x86-64 build on FreeBSD systems

 [2] 2988188: Added support for Windows 64-bit systems


 0.0.91
 ======

 [1] Added documentation to .deb packages

 [2] 2968313: Fixed data corruption issues when decompressing large JPEG images
 and/or using buffered I/O with the libjpeg-turbo decompressor


 0.0.90
 ======

 Initial release
	1.1.90 (1.2 beta1)
	==================

	[1] Added a JNI wrapper for TurboJPEG/OSS. See java/README for more details.

	[2] TurboJPEG/OSS can now scale down images during decompression.


	1.1.0
	=====

	[1] The algorithm used by the SIMD quantization function cannot produce correct
	results when the JPEG quality is >= 98 and the fast integer forward DCT is
	used. Thus, the non-SIMD quantization function is now used for those cases,
	and libjpeg-turbo should now produce identical output to libjpeg v6b in all
	cases.

	[2] Despite the above, the fast integer forward DCT still degrades somewhat for
	JPEG qualities greater than 95, so TurboJPEG/OSS will now automatically use the
	slow integer forward DCT when generating JPEG images of quality 96 or greater.
	This reduces compression performance by as much as 15% for these high-quality
	images but is necessary to ensure that the images are perceptually lossless.
	It also ensures that the library can avoid the performance pitfall created by
	[1].

	[3] Ported jpgtest.cxx to pure C to avoid the need for a C++ compiler.

	[4] Fixed visual artifacts in grayscale JPEG compression caused by a typo in
	the RGB-to-chrominance lookup tables.

	[5] The Windows distribution packages now include the libjpeg run-time programs
	(cjpeg, etc.)

	[6] All packages now include jpgtest.


	1.0.90 (1.1 beta1)
	==================

	[1] Added emulation of the libjpeg v7 and v8 APIs and ABIs. See
	README-turbo.txt for more details. This feature was sponsored by CamTrace SAS.

	[2] Created a new CMake-based build system for the Visual C++ and MinGW builds.

	[3] TurboJPEG/OSS can now compress from/decompress to grayscale bitmaps.

	[4] jpgtest can now be used to test decompression performance with existing
	JPEG images.

	[5] If the default install prefix (/opt/libjpeg-turbo) is used, then
	'make install' now creates /opt/libjpeg-turbo/lib32 and
	/opt/libjpeg-turbo/lib64 sym links to duplicate the behavior of the binary
	packages.

	[6] All symbols in the libjpeg-turbo dynamic library are now versioned, even
	when the library is built with libjpeg v6b emulation.

	[7] Added arithmetic encoding and decoding support (can be disabled with
	configure or CMake options)

	[8] Added a TJ_YUV flag to TurboJPEG/OSS which causes both the compressor and
	decompressor to output planar YUV images.

	[9] Added an extended version of tjDecompressHeader() to TurboJPEG/OSS which
	allows the caller to determine the type of subsampling used in a JPEG image.

	[10] Added further protections against invalid Huffman codes.


	1.0.1
	=====

	[1] The Huffman decoder will now handle erroneous Huffman codes (for instance,
	from a corrupt JPEG image.) Previously, these would cause libjpeg-turbo to
	crash under certain circumstances.

	[2] Fixed typo in SIMD dispatch routines which was causing 4:2:2 upsampling to
	be used instead of 4:2:0 when decompressing JPEG images using SSE2 code.

	[3] configure script will now automatically determine whether the
	INCOMPLETE_TYPES_BROKEN macro should be defined.


	1.0.0
	=====

	[1] 2983700: Further FreeBSD build tweaks (no longer necessary to specify
	--host when configuring on a 64-bit system)

	[2] Created sym. links in the Unix/Linux packages so that the TurboJPEG
	include file can always be found in /opt/libjpeg-turbo/include, the 32-bit
	static libraries can always be found in /opt/libjpeg-turbo/lib32, and the
	64-bit static libraries can always be found in /opt/libjpeg-turbo/lib64.

	[3] The Unix/Linux distribution packages now include the libjpeg run-time
	programs (cjpeg, etc.) and man pages.

	[4] Created a 32-bit supplementary package for amd64 Debian systems which
	contains just the 32-bit libjpeg-turbo libraries.

	[5] Moved the libraries from /lib32 to /lib in the i386 Debian package.

	[6] Include distribution package for Cygwin

	[7] No longer necessary to specify --without-simd on non-x86 architectures, and
	unit tests now work on those architectures.


	0.0.93
	======

	[1] 2982659, Fixed x86-64 build on FreeBSD systems

	[2] 2988188: Added support for Windows 64-bit systems


	0.0.91
	======

	[1] Added documentation to .deb packages

	[2] 2968313: Fixed data corruption issues when decompressing large JPEG images
	and/or using buffered I/O with the libjpeg-turbo decompressor


	0.0.90
	======

	Initial release