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273 lines
11 KiB
Text
273 lines
11 KiB
Text
1.2.0
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=====
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[1] Fixed build issue with YASM on Unix systems (the libjpeg-turbo build system
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was not adding the current directory to the assembler include path, so YASM
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was not able to find jsimdcfg.inc.)
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[2] Fixed out-of-bounds read in SSE2 SIMD code that occurred when decompressing
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a JPEG image to a bitmap buffer whose size was not a multiple of 16 bytes.
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This was more of an annoyance than an actual bug, since it did not cause any
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actual run-time problems, but the issue showed up when running libjpeg-turbo in
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valgrind. See http://crbug.com/72399 for more information.
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[3] Added a compile-time macro (LIBJPEG_TURBO_VERSION) that can be used to
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check the version of libjpeg-turbo against which an application was compiled.
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[4] Added new RGBA/BGRA/ABGR/ARGB colorspace extension constants (libjpeg API)
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and pixel formats (TurboJPEG API), which allow applications to specify that,
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when decompressing to a 4-component RGB buffer, the unused byte should be set
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to 0xFF so that it can be interpreted as an opaque alpha channel.
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[5] Fixed regression issue whereby DevIL failed to build against libjpeg-turbo
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because libjpeg-turbo's distributed version of jconfig.h contained an INLINE
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macro, which conflicted with a similar macro in DevIL. This macro is used only
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internally when building libjpeg-turbo, so it was moved into config.h.
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[6] libjpeg-turbo will now correctly decompress erroneous CMYK/YCCK JPEGs whose
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K component is assigned a component ID of 1 instead of 4. Although these files
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are in violation of the spec, other JPEG implementations handle them
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correctly.
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[7] Added ARM v6 and ARM v7 architectures to libjpeg.a and libturbojpeg.a in
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the official OS X distribution package, so that those libraries can be used to
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build both OS X and iOS applications.
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1.1.90 (1.2 beta1)
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==================
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[1] Added a Java wrapper for the TurboJPEG API. See java/README for more
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details.
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[2] The TurboJPEG API can now be used to scale down images during
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decompression.
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[3] Added SIMD routines for RGB-to-grayscale color conversion, which
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significantly improves the performance of grayscale JPEG compression from an
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RGB source image.
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[4] Improved the performance of the C color conversion routines, which are used
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on platforms for which SIMD acceleration is not available.
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[5] Added a function to the TurboJPEG API that performs lossless transforms.
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This function is implemented using the same back end as jpegtran, but it
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performs transcoding entirely in memory and allows multiple transforms and/or
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crop operations to be batched together, so the source coefficients only need to
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be read once. This is useful when generating image tiles from a single source
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JPEG.
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[6] Added tests for the new TurboJPEG scaled decompression and lossless
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transform features to tjbench (the TurboJPEG benchmark, formerly called
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"jpgtest".)
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[7] Added support for 4:4:0 (transposed 4:2:2) subsampling in TurboJPEG, which
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was necessary in order for it to read 4:2:2 JPEG files that had been losslessly
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transposed or rotated 90 degrees.
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[8] All legacy VirtualGL code has been re-factored, and this has allowed
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libjpeg-turbo, in its entirety, to be re-licensed under a BSD-style license.
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[9] libjpeg-turbo can now be built with YASM.
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[10] Added SIMD acceleration for ARM Linux and iOS platforms that support
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NEON instructions.
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[11] Refactored the TurboJPEG C API and documented it using Doxygen. The
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TurboJPEG 1.2 API uses pixel formats to define the size and component order of
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the uncompressed source/destination images, and it includes a more efficient
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version of TJBUFSIZE() that computes a worst-case JPEG size based on the level
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of chrominance subsampling. The refactored implementation of TurboJPEG/OSS
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now uses the libjpeg memory source and destination managers, which allows the
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TurboJPEG compressor to grow the JPEG buffer as necessary.
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[12] Eliminated errors in the output of jpegtran on Windows that occurred when
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the application was invoked using I/O redirection
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(jpegtran <input.jpg >output.jpg).
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[13] The inclusion of libjpeg v7 and v8 emulation as well as arithmetic coding
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support in libjpeg-turbo v1.1.0 introduced several new error constants in
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jerror.h, and these were mistakenly enabled for all emulation modes, causing
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the error enum in libjpeg-turbo to sometimes have different values than the
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same enum in libjpeg. This represents an ABI incompatibility, and it caused
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problems with rare applications that took specific action based on a particular
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error value. The fix was to include the new error constants conditionally
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based on whether libjpeg v7 or v8 emulation was enabled.
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[14] Fixed an issue whereby Windows applications that used libjpeg-turbo would
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fail to compile if the Windows system headers were included before jpeglib.h.
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This issue was caused by a conflict in the definition of the INT32 type.
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[15] Fixed 32-bit supplementary package for amd64 Debian systems, which was
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broken by enhancements to the packaging system in 1.1.
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[16] When decompressing a JPEG image using an output colorspace of
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JCS_EXT_RGBX, JCS_EXT_BGRX, JCS_EXT_XBGR, or JCS_EXT_XRGB, libjpeg-turbo will
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now set the unused byte to 0xFF, which allows applications to interpret that
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byte as an alpha channel (0xFF = opaque).
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1.1.1
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=====
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[1] Fixed a 1-pixel error in row 0, column 21 of the luminance plane generated
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by tjEncodeYUV().
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[2] libjpeg-turbo's accelerated Huffman decoder previously ignored unexpected
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markers found in the middle of the JPEG data stream during decompression. It
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will now hand off decoding of a particular block to the unaccelerated Huffman
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decoder if an unexpected marker is found, so that the unaccelerated Huffman
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decoder can generate an appropriate warning.
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[3] Older versions of MinGW64 prefixed symbol names with underscores by
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default, which differed from the behavior of 64-bit Visual C++. MinGW64 1.0
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has adopted the behavior of 64-bit Visual C++ as the default, so to accommodate
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this, the libjpeg-turbo SIMD function names are no longer prefixed with an
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underscore when building with MinGW64. This means that, when building
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libjpeg-turbo with older versions of MinGW64, you will now have to add
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-fno-leading-underscore to the CFLAGS.
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[4] Fixed a regression bug in the NSIS script that caused the Windows installer
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build to fail when using the Visual Studio IDE.
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[5] Fixed a bug in jpeg_read_coefficients() whereby it would not initialize
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cinfo->image_width and cinfo->image_height if libjpeg v7 or v8 emulation was
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enabled. This specifically caused the jpegoptim program to fail if it was
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linked against a version of libjpeg-turbo that was built with libjpeg v7 or v8
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emulation.
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[6] Eliminated excessive I/O overhead that occurred when reading BMP files in
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cjpeg.
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[7] Eliminated errors in the output of cjpeg on Windows that occurred when the
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application was invoked using I/O redirection (cjpeg <inputfile >output.jpg).
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1.1.0
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=====
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[1] The algorithm used by the SIMD quantization function cannot produce correct
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results when the JPEG quality is >= 98 and the fast integer forward DCT is
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used. Thus, the non-SIMD quantization function is now used for those cases,
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and libjpeg-turbo should now produce identical output to libjpeg v6b in all
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cases.
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[2] Despite the above, the fast integer forward DCT still degrades somewhat for
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JPEG qualities greater than 95, so TurboJPEG/OSS will now automatically use the
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slow integer forward DCT when generating JPEG images of quality 96 or greater.
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This reduces compression performance by as much as 15% for these high-quality
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images but is necessary to ensure that the images are perceptually lossless.
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It also ensures that the library can avoid the performance pitfall created by
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[1].
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[3] Ported jpgtest.cxx to pure C to avoid the need for a C++ compiler.
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[4] Fixed visual artifacts in grayscale JPEG compression caused by a typo in
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the RGB-to-luminance lookup tables.
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[5] The Windows distribution packages now include the libjpeg run-time programs
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(cjpeg, etc.)
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[6] All packages now include jpgtest.
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[7] The TurboJPEG dynamic library now uses versioned symbols.
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[8] Added two new TurboJPEG API functions, tjEncodeYUV() and
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tjDecompressToYUV(), to replace the somewhat hackish TJ_YUV flag.
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1.0.90 (1.1 beta1)
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==================
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[1] Added emulation of the libjpeg v7 and v8 APIs and ABIs. See
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README-turbo.txt for more details. This feature was sponsored by CamTrace SAS.
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[2] Created a new CMake-based build system for the Visual C++ and MinGW builds.
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[3] Grayscale bitmaps can now be compressed from/decompressed to using the
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TurboJPEG API.
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[4] jpgtest can now be used to test decompression performance with existing
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JPEG images.
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[5] If the default install prefix (/opt/libjpeg-turbo) is used, then
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'make install' now creates /opt/libjpeg-turbo/lib32 and
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/opt/libjpeg-turbo/lib64 sym links to duplicate the behavior of the binary
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packages.
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[6] All symbols in the libjpeg-turbo dynamic library are now versioned, even
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when the library is built with libjpeg v6b emulation.
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[7] Added arithmetic encoding and decoding support (can be disabled with
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configure or CMake options)
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[8] Added a TJ_YUV flag to the TurboJPEG API, which causes both the compressor
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and decompressor to output planar YUV images.
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[9] Added an extended version of tjDecompressHeader() to the TurboJPEG API,
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which allows the caller to determine the type of subsampling used in a JPEG
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image.
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[10] Added further protections against invalid Huffman codes.
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1.0.1
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=====
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[1] The Huffman decoder will now handle erroneous Huffman codes (for instance,
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from a corrupt JPEG image.) Previously, these would cause libjpeg-turbo to
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crash under certain circumstances.
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[2] Fixed typo in SIMD dispatch routines that was causing 4:2:2 upsampling to
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be used instead of 4:2:0 when decompressing JPEG images using SSE2 code.
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[3] configure script will now automatically determine whether the
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INCOMPLETE_TYPES_BROKEN macro should be defined.
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1.0.0
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=====
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[1] 2983700: Further FreeBSD build tweaks (no longer necessary to specify
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--host when configuring on a 64-bit system)
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[2] Created sym. links in the Unix/Linux packages so that the TurboJPEG
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include file can always be found in /opt/libjpeg-turbo/include, the 32-bit
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static libraries can always be found in /opt/libjpeg-turbo/lib32, and the
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64-bit static libraries can always be found in /opt/libjpeg-turbo/lib64.
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[3] The Unix/Linux distribution packages now include the libjpeg run-time
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programs (cjpeg, etc.) and man pages.
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[4] Created a 32-bit supplementary package for amd64 Debian systems, which
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contains just the 32-bit libjpeg-turbo libraries.
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[5] Moved the libraries from */lib32 to */lib in the i386 Debian package.
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[6] Include distribution package for Cygwin
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[7] No longer necessary to specify --without-simd on non-x86 architectures, and
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unit tests now work on those architectures.
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0.0.93
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======
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[1] 2982659, Fixed x86-64 build on FreeBSD systems
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[2] 2988188: Added support for Windows 64-bit systems
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0.0.91
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======
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[1] Added documentation to .deb packages
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[2] 2968313: Fixed data corruption issues when decompressing large JPEG images
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and/or using buffered I/O with the libjpeg-turbo decompressor
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0.0.90
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======
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Initial release
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