Hash :
29f718ee
Author :
Date :
2019-12-31T00:06:11
README.md, package specs: Various tweaks
- Don't enumerate the types of SIMD instructions that libjpeg-turbo
supports, as this can change without notice.
- Use more clear terminology when describing support for libjpeg v7/v8
features ("libjpeg" is, colloquially but not officially, the name for
the IJG's software, whereas the "libjpeg API" refers to our emulation
of said software.)
- "PhotoShop" = "Photoshop" (StudLy Caps Police)
- Adjust dynamic library versions to reflect the addition of
jpeg_read_icc_profile() and jpeg_write_icc_profile() in
libjpeg-turbo 2.0.x.
Package: {__PKGNAME}
Version: @VERSION@-@BUILD@
Section: misc
Priority: optional
Architecture: {__ARCH}
Essential: no
Maintainer: @PKGVENDOR@ <@PKGEMAIL@>
Homepage: @PKGURL@
Installed-Size: {__SIZE}
Description: A SIMD-accelerated JPEG codec that provides both the libjpeg and TurboJPEG APIs
libjpeg-turbo is a JPEG image codec that uses SIMD instructions to accelerate
baseline JPEG compression and decompression on x86, x86-64, ARM, PowerPC, and
MIPS systems, as well as progressive JPEG compression on x86 and x86-64
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.