etlegacy-libs/jpegturbo/release
2017-07-01 16:55:13 +02:00
..
deb-control.tmpl libs: updated to libjpeg-turbo 1.5.1 2017-07-01 16:55:13 +02:00
Distribution.xml updated to jpeg-turbo 1.4.0 2015-01-24 22:50:55 +01:00
libjpeg-turbo.nsi.in libs: updated to libjpeg-turbo 1.5.1 2017-07-01 16:55:13 +02:00
libjpeg-turbo.spec.in libs: updated to libjpeg-turbo 1.5.1 2017-07-01 16:55:13 +02:00
libjpeg.pc.in libs: updated to libjpeg-turbo 1.5.1 2017-07-01 16:55:13 +02:00
libturbojpeg.pc.in libs: updated to libjpeg-turbo 1.5.1 2017-07-01 16:55:13 +02:00
License.rtf imported libjpeg-turbo version 1.3.1 2014-11-21 21:33:36 +01:00
makecygwinpkg.in imported libjpeg-turbo version 1.3.1 2014-11-21 21:33:36 +01:00
makedpkg.in updated to jpeg-turbo 1.4.0 2015-01-24 22:50:55 +01:00
makemacpkg.in updated to jpeg-turbo 1.4.0 2015-01-24 22:50:55 +01:00
ReadMe.txt libs: updated to libjpeg-turbo 1.5.1 2017-07-01 16:55:13 +02:00
uninstall.in libs: updated to libjpeg-turbo 1.5.1 2017-07-01 16:55:13 +02:00
Welcome.rtf imported libjpeg-turbo version 1.3.1 2014-11-21 21:33:36 +01:00

libjpeg-turbo is a JPEG image codec that uses SIMD instructions (MMX, SSE2, NEON, AltiVec) to accelerate baseline JPEG compression and decompression on x86, x86-64, ARM, and PowerPC systems.  On such systems, libjpeg-turbo is generally 2-6x as fast as libjpeg, all else being equal.  On other types of systems, libjpeg-turbo can still outperform libjpeg by a significant amount, by virtue of its highly-optimized Huffman coding routines.  In many cases, the performance of libjpeg-turbo rivals that of proprietary high-speed JPEG codecs.

libjpeg-turbo implements both the traditional libjpeg API as well as the less powerful but more straightforward TurboJPEG API.  libjpeg-turbo also features colorspace extensions that allow it to compress from/decompress to 32-bit and big-endian pixel buffers (RGBX, XBGR, etc.), as well as a full-featured Java interface.

libjpeg-turbo was originally based on libjpeg/SIMD, an MMX-accelerated derivative of libjpeg v6b developed by Miyasaka Masaru.  The TigerVNC and VirtualGL projects made numerous enhancements to the codec in 2009, and in early 2010, libjpeg-turbo spun off into an independent project, with the goal of making high-speed JPEG compression/decompression technology available to a broader range of users and developers.