| 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. |
| |
| [3] Added SIMD routines for RGB-to-grayscale color conversion, which |
| significantly improves the performance of grayscale JPEG compression from an |
| RGB source image. |
| |
| [4] Improved performance for non-x86 machines. |
| |
| [5] Added a function to the TurboJPEG API which performs lossless transforms. |
| This function uses the same back end as jpegtran, but it performs transcoding |
| entirely in memory and allows multiple transforms and/or crop operations to be |
| batched together, so the source coefficients only need to be read once. This |
| is useful when generating image tiles from a single source JPEG. |
| |
| [6] Modified jpgtest to benchmark the new scaled decompression and lossless |
| transform features in TurboJPEG/OSS. |
| |
| [7] Added support for 4:4:0 (transposed 4:2:2) subsampling in TurboJPEG, which |
| was necessary in order for it to read 4:2:2 JPEG files that had been losslessly |
| transposed or rotated 90 degrees. |
| |
| [8] Fixed a regression bug in the NSIS script that caused the Windows installer |
| build to fail when using the Visual Studio IDE. |
| |
| |
| 1.1.1 |
| ===== |
| |
| [1] Fixed a 1-pixel error in row 0, column 21 of the luminance plane generated |
| by tjEncodeYUV(). |
| |
| [2] Fixed the accelerated Huffman decoder so that it mimics the behavior of |
| the unaccelerated decoder and throws a warning if an unexpected marker is found |
| in the middle of the JPEG data stream. |
| |
| [3] Older versions of MinGW64 prefixed symbol names with underscores by |
| default, which differed from the behavior of 64-bit Visual C++. MinGW64 1.0 |
| has adopted the behavior of 64-bit Visual C++ as the default, so to accommodate |
| this, the libjpeg-turbo SIMD function names are no longer prefixed with an |
| underscore when building with MinGW64. This means that, when building |
| libjpeg-turbo with older versions of MinGW64, you will now have to add |
| -fno-leading-underscore to the CFLAGS. |
| |
| |
| 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. |
| |
| [7] The TurboJPEG dynamic library now uses versioned symbols. |
| |
| [8] Added two new TurboJPEG API functions, tjEncodeYUV() and |
| tjDecompressToYUV(), to replace the somewhat hackish TJ_YUV flag. |
| |
| |
| 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 |